33 results about "Force sensor" patented technology

A band saw machine includes a chassis, a motor mounted to chassis, a driving wheel mounted to the chassis and connected with the motor, a driven wheel mounted to the chassis, a band saw running on the driving and driven wheels, a band-saw regulator mounted to the chassis and located between the driving and driven wheels, and a force sensor mounted inside the band-saw regulator for sensing how much a force is applied to the band-saw regulator in the process of cutting and for emitting a sensing signal to a control system. In this way, the control system can control the rotational speed of the motor according to the sensing signal received from the force sensor to automatically regulate the cutting speed.

In a force sensor chip, a semiconductor substrate includes: a plurality of operating parts each including an external-force acting area section and a non-deforming section; a supporting part for supporting the operating parts, and a plurality of connecting parts for connecting the operating parts and the supporting part. Strain resistance elements are provided on deformation-generating sections of the connecting parts. The plurality of operating parts are provided, in corresponding relation to the plurality of connecting parts, between the connecting parts and the supporting part.

A travel scale includes side housings which telescopically connect to a center bridging section that receives signals from load cells located on the bottom side of the side housings. The signals are transmitted to a readout in the bridging section. Upon closing of the housings, the bridging section is protectively covered by the top side of the housings.

In a touch-mode capacitance type pressure sensor, a quartz pressure sensor that can solve difficulty in thickness control on a diaphragm due to a low etching precision which is a drawback in a pressure sensor using a detecting piece made from silicon, and deterioration in a detecting accuracy and poor repetitive reproducibility in elastic deformation due to the difficulty, respectively, is provided by utilizing quartz as a detecting piece for the pressure sensor. The quartz pressure sensor includes a bottom plate made from an insulating material, a lower electrode film and a dielectric film sequentially laminated on a face of the bottom plate, a detecting piece provided at a position thereof opposed to said dielectric film with a thin portion and fixed on the face of the bottom plate, and an upper electrode film formed in at least one portion of the thin portion having a positional relationship thereof opposed to the lower electrode film, in which a fine gap airtight space is provided between a lower face of the detecting piece and the dielectric film is characterized in that the detecting piece is made from a quartz material.

A device for measuring a railway vehicle end relation is characterized in that the device comprises an upper n-shaped frame dovetail guide rail beam device, a lower n-shaped frame dovetail guide rail beam device, a draw gear counter-force hinge base assembly and a vehicle end wall fixing device, the upper n-shaped frame dovetail guide rail beam device is connected with a T-shaped groove guide rail in front of the vehicle end wall fixing device through a pressing bar assembly, the lower n-shaped frame dovetail guide rail beam device is connected with a T-shaped groove guide rail in front of the vehicle end wall fixing device through a pressing bar assembly as well, the parts of the overall device are arranged in pairs oppositely, and vehicle end connecting boards on the front side faces of the upper n-shaped frame dovetail guide rail beam device and the lower n-shaped frame dovetail guide rail beam device are used for clamping a vehicle body in an experiment. According to the device for measuring the railway vehicle end relation, connection can be completed according to different structures and sizes of draw gears, the interference force detection of the draw gears, the detection of the windshield acting force and the force moment of a vehicle end wall and the detection of the acting force and the force moment of a vehicle end electric cable can be completed; disassembly, assembly, combination and adjustment of a door are flexible and convenient, an gantry is large in overall rigidity, the requirements of rigidity tests can be satisfied, the adjustment of electric cable connecting points between trains is convenient, and the installation position of a force cell is conveniently adjusted.

The invention relates to an automotive active engine mount capable of energy regeneration and transmitting force perception. The automotive active engine mount consists of an active engine mount actuator body and a control circuit system, wherein the active engine mount actuator body mainly consists of rubber springs, a base, a position-fixing pin, a metal framework, an electromagnetic linear module and a piezoelectric module; the upper end and the lower end of the active engine mount actuator body are respectively connected with an engine body and an automobile frame through connecting bolts;and an actuator control system mainly consists of an energy recovery module, a controller, a storage battery voltage sensor, a controllable current source, a rotating speed sensor, a force sensor, anactuator energy regeneration voltage sensor and a relay. The invention also relates to a control method of the automotive active engine mount. The automotive active engine mount is novel in structureand high in practicability and is capable of significantly reducing the impact of engine vibration on a chassis and the automobile body, improving the ride comfort of an automobile, reducing the noise in the automobile, recovering the energy of the engine vibration, reducing the energy consumption of the automobile and achieving the purpose of improving the performance of the entire automobile while reducing the energy consumption.

The invention discloses a variable-pitch hydraulic transmission wind turbine. The wind turbine comprises a wind energy acquirer and a variable pump coaxially connected; the variable pump is provided with a variable pump control unit; the variable pump communicates with a hydraulic energy storer, an oil supply system, a high-pressure pressure gauge, a high-pressure pressure sensor and a pilot electric-hydraulic proportional control valve through a one-way valve at the same time; the pilot electric-hydraulic proportional control valve is connected with a permanent magnet synchronous generator through a variable motor; the variable motor is provided with a variable motor control unit; the variable pump communicates with an inlet oil filter; the variable motor communicates with an outlet oil filter; the inlet oil filter communicates with a low-pressure pressure gauge, a low-pressure pressure sensor, an overflow valve and the outlet oil filter at the same time; the overflow valve also communicates with a hydraulic oil tank; and a one-way valve communicates between an outlet end of the one-way valve and an inlet end of the inlet oil filter. The invention further discloses a control method of the variable-pitch hydraulic transmission wind turbine. The device and the method are reliable in work.

The invention provides a wearable type assisted traveling device with adjustable step speed and self-adaptive step pitch. The wearable type assisted traveling device comprises a mechanical assembly and a control assembly, wherein the mechanical assembly comprises a waistband, and the two sides of the waistband are symmetrically equipped with racks; thigh support plates are mounted below the racksin a matched mode; the lower ends of the thigh support plates are equipped with thigh fixing belts in the matched mode, and the lower ends of the thigh support plates are equipped with spring coils; the control assembly comprises a power supply module, a motor driver, a control module, a step speed regulating knob, a power supply switch, a sensor A, a sensor B and film pressure sensors which are connected through cables, and is equipped with an electromagnet A and an electromagnet B, the sensor A and the sensor B are mounted on a protective cover in the matched mode, and the film pressure sensors are arranged at the lower ends of the spring coils. Compared with the prior art, the wearable type assisted travelling device has the beneficial effects of solving the long-time travelling obstacle problem of the old, and has the advantages of being adjustable in step speed, enabling step pitch to automatically adapt to to walking habits of people under different conditions, being safe and reliable, being simple in structure, being low in cost, and the like.

The invention provides a monitor for the stoppage of mechanical filter, belonging to a monitoring device, which comprises a pressure sensor in liquid inlet pipe, another sensor in liquid inlet cavity of mechanical filter, and a third pressure sensor in liquid outlet cavity, every pressure sensor being equipped with the carry-in terminal of micro processor, the outlet of which is separately equipped with a display and a alarm, and the display being used to monitor the stoppage state of mechanical filter continuously and precisely. With the monitor people can control the mechanical filter actively according to the stoppage state.

The invention discloses a dual-motor differential speed control system and method for a surface aircraft. The differential speed control system comprises a controller, two membrane pressure sensors, two signal conversion circuits, two electronic speed regulators, and two motors. The two membrane pressure sensors are installed below two button springs respectively and are used for collecting pressure values of the button springs; the output terminals of the two membrane pressure sensors are connected with the input terminals of the two signal conversion circuits. The output terminals of the twosignal conversion circuits are respectively connected with two AD input pins of the controller. The signal conversion circuits are used for converting the output signals of the membrane pressure sensors into voltage signals. The two control signal output ports of the controller are respectively connected with the input terminals of the two electronic speed regulators; and the output terminals ofthe two electronic speed regulators are connected with the two motors. With the dual-motor differential speed control system and method, the turning directions and speeds of the surface aircraft can be controlled simultaneously.

The invention belongs to the technical field of composite stress and strain measurement, and provides an out-of-surface strain measuring method based on digital image correlation. The out-of-surface strain measuring method comprises the steps of: firstly, conducting a text according to an experimental scheme, correlating a camera with a force sensor in order to ensure that a distance between a lens and a test piece remains unchanged, driving the camera and force sensor to move simultaneously, slowly loading the test piece, and pressing down a camera shutter at the same time, wherein the camerashutter is not loosened during the test process until the end of loading, and images and test data before and after deformation are obtained after the test ends; secondly, writing an algorithm for calculating and searching a position of a point after deformation, so as to obtain deformation information (displacement and strain) of the test piece, and performing bilinear interpolation to obtain astrain value of an arbitrary point of the test piece through dividing regions; and finally, acquiring a strain cloud chart of the test piece through setting shades of colors according to whether the strain value is plus or minus and the magnitude of the strain value. The out-of-surface strain measuring method is convenient to operate, can be applied to deformation measurement of complicated structures, improves the calculation efficiency and expands the applicable range.

The invention discloses a method for detecting the static determinacy degree of a human body in the meditation process and a meditation device. The device comprises a seat for the human body to meditate, a gravity center detection unit and a processing unit, wherein the gravity center detection unit consists of at least two pressure sensors arranged in the seat, and a computer system and is used for detecting the change rate of gravity center movement of the human body; and the processing unit is connected with the gravity center detection unit and is used for evaluating the static determinacy degree of the human body according to the change rate of the gravity center movement of the human body. The method and the device have the advantages that: (1) the static determinacy degree of the human body in the meditation process can be effectively evaluated according to the gravity center change of the human body; (2) the pressure sensors concealedly arranged in the seat are adopted in the process of detecting the gravity center change of the human body, so that the meditation process of the human body cannot be interfered; and (3) the number and distance of the pressure sensors are obtained through experiments, and a simple and high-efficiency algorithm is convenient to adopt.

The invention discloses an energy dissipation property testing device of a bolting connection part, a testing method and a molding method; the testing device comprises a force tensile testing machine, an upper test piece, a lower test piece, a bolt, a strain gage, a bridge, a dynamic strain meter, a signal collecting system and a computer; the upper test piece is fixed with an upper clamp of the force tensile testing machine, and the lower test piece is fixed with a lower clamp of the force tensile testing machine; the upper test piece and the lower test piece are fixed through the bolt; the strain gage is placed in the bolt, and connected with the bridge; the bridge is connected with the signal collecting system through the dynamic strain meter; the force and displacement of the force tensile testing machine are sent to the signal collecting system through the force sensor and the displacement sensor respectively; the signal collecting system is connected with the computer and sends the testing data of the collected bolting combining part force, displacement and bolt pre-tightening force to the computer. The device is simple in structure, convenient to mount and dismount, and easy to repeat test, and solves the problem that the lagged non-linear property of the bolting combining part is hard to test.

The invention discloses a portable online pressure calibration device based on the PXI bus technology, which belongs to the technical field of pressure measurement. The device includes a portable PXIcase, a PXI power supply module, a PXI direct current acquisition module, a PXI direct voltage acquisition module, a display, a keyboard, a controller and a standard force sensor. The controller is connected with the PXI power supply module, the PXI direct current acquisition module, the PXI direct voltage acquisition module, the display and the keyboard through a PXI bus. The display, the keyboard and the controller are integrated in the portable PXI case. The PXI power supply module, the PXI direct current acquisition module and the PXI direct voltage acquisition module are connected with the standard pressure sensor. The portable online pressure calibration device based on the PXI bus technology can realize fast and automatic calibration of pressure sensors, reduce the number and volumeof standard pressure equipment and greatly improve the calibration efficiency of pressure sensors.

Electronic pressure switch comprising a pressure sensor and a circuit provided in turn with a switch for the activation/deactivation of an electric pump, an input terminal and an output terminal for connection to the mains and connection between the pressure switch and the electric pump and a microcontroller for controlling the switch, which receives signals from the pressure sensor, wherein the electric circuit comprises a current sensor connected to the microcontroller, so that it can stop the operation of the electric pump due to overcurrent, thus avoiding having to mount a specific sensor in the electric pump. It also allows, by interacting with the pressure sensor through a programmed logic, an operation of the electric pump in no-load condition, without water, as well as water hammers, to be detected with greater reliability.

The invention relates to a die structure for plate drawing and bulging performance experiments. The die structure comprises an upper die structure, a lower die structure, a force sensor I, a force sensor II and a displacement sensor; the upper die structure comprises an upper die base, a bulging die and a die plate insert; the lower die structure comprises a blank holder, a bottom plate, a bulgingmale die, a drawing male die and a lower die insert; the blank holder and the upper die base can move up and down relatively; the bulging male die extends out of the drawing male die to bulge a plate; the force sensor I is used for outputting bulging force during bulging of the plate in real time; the force sensor II outputs a counter-acting force of the plate to the drawing male die in real timeduring the drawing experiment; the displacement sensor outputs the displacement of the blank holder at the corresponding time; and the maximum height at which cracking does not occur when the plate is subjected to drawing and bulging experiments is obtained according to the time, force and displacement curve. According to the die structure for the plate drawing and bulging performance experiments, bulging and drawing experiments of plates with different plate materials and different plate material thicknesses are realized through one set of die structure, the experiment cost is reduced, and the experiment accuracy and efficiency are improved.

The invention discloses a device and a method for testing a deterioration mechanism of a crack-containing rock under water-rock interaction. The testing device comprises a base and a rock fixing device; the rock fixing device is fixed on the base; a thin film pressure sensor and a vibration sensor are arranged in the rock fixing device; a water deflector is arranged at the upper end of the rock fixing device; the water deflector is connected with a water supply device through a water pipe; both the thin film pressure sensor and the vibration sensor are electrically connected with a dynamic data collector; and the dynamic data collector is electrically connected with a computer. The testing method using the device comprises the steps S1-S6. Through the testing device and the testing method,the property and the structure of the crack-containing rock can be judged, and the probability that the crack-containing rock causes a geological disaster can be known; and the meso-structure and themechanical change process of a rock sample in the water-rock interaction process of the rock can be judged by quantitatively observing the stress strain and the micro-seismic change of the rock sample, and the deterioration process of the crack-containing rock under the water-rock interaction is visualized.

The invention discloses a novel car anti-collision device. The car anti-collision device comprises a left fixed part, a right fixed part and a buffer part which is arranged between the left fixed part and the right fixed part. A plurality of air bags are arranged in the buffer part and comprise the first arc air bag, the second air bag and the cone air bag which is arranged between the first arc air bag and the second air bag. The first auxiliary air bag is arranged in the left fixed part. The second auxiliary air bag is arranged in the right fixed part. Pressure sensors are arranged in all the air bags in which inflation openings are formed. The pressure sensors are in communication connection with a controller. One end of each inflation branch is connected with one inflation opening, and the other end of each inflation branch is connected with a main pipeline which is further connected with an air tank. The novel car anti-collision device is simple in structure and good in anti-collision property, is provided with the air bags, so that the buffer capability can be strong, and meets using demands.

The invention discloses a safety distribution board monitored based on the wireless sensor technology. The safety distribution board comprises a power supply distributor and three power distributors. Each power distributor is composed of an electric control circuit, a frequency conversion controller, a pumping unit intelligent intermittent pumping controller, a wireless sensor module, a data acquisition module, a figure testing sensor, a digital pressure sensor, a digital temperature sensor and a three-phase power acquisition module. The wireless sensor module includes an ARM microprocessor and a remote monitoring center. The ARM microprocessor is connected to a GPRS module through an RS232 interface, and the GPRS module is connected to the remote monitoring center via a GPRS network. The e ARM microprocessor is connected to an Ethernet gateway through an Ethernet interface, and the Ethernet gateway is connected to the remote monitoring center via the Internet. According to the invention, data acquisition is reliable, analysis of the working condition is accurate, frequency adjustment is scientific, and field application is stable. Energy saving is achieved, and the efficiency of the pumping system is improved. Moreover, wireless remote monitoring is realized, and the safety of underground work is ensured.

In one aspect, a load cell includes an elastic body, first optical unit, second optical unit, detector, and computation unit. The first optical unit has a light source, a first diffraction grating on which light from the light source is incident, and a light-receiving unit. The first optical unit is fixed to a first end portion of the elastic body and arranged within a hollow portion of the elastic body. The second optical unit has a second diffraction grating on which diffracted light from the first diffraction grating is incident to generate interference light. The second optical unit is fixed to a second end portion of the elastic body and arranged within the hollow portion. The detector detects the interference light. The computation unit computes a relative displacement amount of the second diffraction grating relative to the first diffraction grating on the basis of a signal obtained by the detector.

The invention discloses an intelligent fume hood system and a control method thereof. The intelligent fume hood system comprises a fume hood body, a glass sliding door, a balance weight mechanism, a vent valve, a lifting driving mechanism and the like, and further comprises a first sensor, a second sensor, a controller and the like. The controller can correspondingly control opening and closing of the glass sliding door and the vent valve according to signals monitored by the first sensor and the second sensor. According to the intelligent fume hood system, the structure of the lifting driving mechanism of the glass sliding door is improved, a human body proximity sensor, a force sensor and/or a gesture recognition sensor, an infrared distance sensor and the like are combined, the opening and closing state of the glass sliding door and the opening and closing state of a valve plate of the vent valve can be automatically controlled, good convenience is provided for experimenters, potential safety hazards caused by gas leakage in a fume hood can be eradicated, energy consumption can be reduced, and the intelligent fume hood system is safer and more environmentally friendly.

The invention belongs to the field of engine performance testing equipment, and discloses a system for controlling the oil quantity of an alcohol consumption instrument. The system comprises a measuring fuel cup, a methanol fuel pump, a weighing sensor, a switching power supply, a switching power supply controller, a first methanol pressure sensor, a second methanol pressure sensor, a safety valve, an overflow pipe and an overflow cup, wherein the measuring fuel cup is provided with a fuel inlet and a fuel outlet. The weighing sensor is installed on the measuring fuel cup. The input end of theswitching power supply is connected with a storage battery, and the output end of the switching power supply is connected to the methanol fuel pump. The overflow pipe and the first methanol pressuresensor are installed on a main pipe. The switching power supply controller is connected with the first methanol pressure sensor, the second methanol pressure sensor and the switching power supply. Thesystem can achieve the adjustment-only function of the fuel quantity of the alcohol consumption instrument, and facilitates the test of an engine under various conditions. Meanwhile, the methanol fuel pump in alcohol consumption instrument does not operate at a full load manner, thereby saving the energy.

The invention discloses a technology for simultaneously identifying rigidity and axial force of a truss structure based on MATLAB-ABAQUS interaction conditions to evaluate structural damage and predict residual bearing capacity, belongs to the field of structural damage identification. The technology mainly comprises the following four steps: establishing a finite element model of a steel truss damage structure; modifying the inp file and establishing a finite element template file; inputting a real to-be-identified quantity and generating an inp file, and calculating and obtaining a corresponding node acceleration and rod strain; simulating the estimated response of the quantity to be identified; and continuously optimizing the to-be-identified quantity by using the target function untila convergence condition is met, and outputting a final result. The method has the main advantages that (1) while the rigidity of a certain rod piece of the steel truss is recognized, the axial force of the same rod piece can also be recognized; (2) the position of the sensor has no special requirement, and the sensor is not required to be installed on a rod piece needing axial force identification; and (3) the number of sensors is less. Therefore, the application prospect of the method is wide.

The invention discloses a high-power charging device used for an electric bus. The device includes a chain bin, a left supporting chain, a right supporting chain, a supporting chain driving mechanismand a charging electrode for being in contact with a bus roof power receiving electrode, wherein the left supporting chain and the right supporting chain are arranged in the chain bin; the supportingchain driving mechanism is positioned in the chain bin, connected with the upper ends of the left supporting chain and the right supporting chain and used for driving the left supporting chain and theright supporting chain to move up and down; two magnetic sensors are arranged on the lower surface of a fixing plate, magnets corresponding to the magnetic sensors are arranged on the upper surface of a mounting plate, a first transmission gear and a second transmission gear are installed at both ends of the outer side surface of a first hanging plate or a second ganging plate respectively, and adriving gear and a driven gear are installed on the outer side surface, corresponding to the first transmission gear, of the first hanging plate or the second hanging plate. According to the device,the space can be effectively saved, and the device is small in size, low in weight, simple in structure and capable of achieving a protection function on a chain and a charging electrode.

The ink jet printer for the labelling of goods has a write head, which comprises at least one outlet opening for ink droplets, a printing mechanism connected to said outlet opening, a pneumatic pump and an electrical control. It has at least one supply tank for fluid flowing through the outlet opening. The supply tank is releasably connected to the write head in a coupling area. In the write head, a first pressure sensor is arranged at the compressed-air line, which detects the air pressure in the compressed-air line and outputs an air pressure signal to the controller. A second pressure sensor is arranged at the ink line, which detects the pressure in the ink line and outputs an ink pressure signal to the controller. Said controller outputs a signal “ink empty”, if the ink pressure signal declines by more than 10% in relation to the air pressure signal.