85 results about "Pressure sensor" patented technology

A detection device for internal combustion engines exhaust gases post-treatment systems has a casing (2, 3) housing a circuit arrangement (21, 31) including humidity sensor means (32), for measuring the humidity of the gas. The circuit arrangement further comprises temperature sensor means (33) and pressure sensor means (22), for detecting a gas temperature value and a gas pressure value, respectively. The gas temperature value can be used for compensating the humidity value obtained through the humidity sensor means (32) and the pressure value can be used for deducing the clogging degree of a filter of the post-treatment system. Preferably the pressure sensor means (22) are housed in a first chamber (8) of the casing (2-3) while the humidity sensor means (32) and the temperature sensor means (33) are housed in a second chamber (10b) of the casing (2, 3).

The invention provides a hydraulic reciprocating seal dynamic property detection device and design. The device comprises a dynamic friction property detection module, an inner leakage detection module and an outer leakage detection module which share a part of a testing device. When a hydraulic cylinder (1) is connected with a first testing cylinder (2) through an S-shaped tension pressure sensor (4), the S-shaped tension pressure sensor only achieves a connection effect, and thus the structure of the outer leakage detection module and the structure of the dynamic friction property detection module are similar. As long as an oil level sensor (8) is additionally arranged on a left gland of the first testing cylinder, the oil level sensor is welded to the left gland of the first testing cylinder through a supporting steel tube. According to the detection device, under the premise that the function requirements of a hydraulic reciprocating structure and a hydraulic execution element are not changed, detection of the dynamic friction property and the leakage property of a hydraulic reciprocating seal in application is conducted according to the normal operation condition of the hydraulic execution element. According to the hydraulic reciprocating seal dynamic property detection device and design, analysis and evaluation of the dynamic property of the hydraulic reciprocating seal can be achieved.

A control system and method for detecting a hydraulic system leak in an engine includes a pressure sensor that senses a first pressure reading of a hydraulic fluid supply at a first time and a second pressure reading of said hydraulic fluid supply at a second time. A comparison module calculates a pressure ratio based on the first and second pressure readings and signals a fault condition based on a relationship between the pressure ratio and a pressure threshold.

The invention discloses an electric power overhaul lifting platform. The electric power overhaul lifting platform comprises a platform base and a lifting table arranged above the platform base. At least four pressure sensors are arranged on the lifting table at equal intervals. A control box is arranged on the platform base. A control circuit is arranged in the control box. The pressure sensors are connected with the control circuit through wires. According to the electric power overhaul lifting platform, four hydraulic cylinders are adopted to push a support to move in the direction of a diagonal line of the platform base, when the pressure sensors detect that the weight on the lifting table is not even, the supporting position can be adjusted by adjusting the position of the support, and therefore potential safety hazards caused by the unstable gravity center of the lifting table can be avoided.

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.

The invention discloses a listening position adjusting method and system for an automobile sound box, belonging to the field of automobiles. The method comprises the following steps: acquiring a voltage value output by a pressure sensor under each seat in an automobile; determining the number and positions of passengers in the automobile according to the voltage value output by the pressure sensor; determining an optimal listening position scheme which corresponds to the number and positions of passengers in the automobile; controlling loudspeakers in the automobile to sound according to the optimal listening position scheme. According to the method, the number and positions of the passengers in the automobile are determined according to the voltage value output by the pressure sensor under each seat in the automobile, and the loudspeakers in the automobile are controlled to sound according to the optimal listening position scheme which corresponds to the number and positions of passengers in the automobile, thereby realizing automatic control of the listening positions of the automobile, realizing automatic adjustment of the optimal listening positions of the entire automobile according to the number and positions of passengers, improving the overall feel of the passengers on the sound effect of the entire automobile, and enhancing the intelligence and scientific degree of the automobile.

The invention provides an operation monitoring system of a hot-line working robot. Monitoring objects include a first mechanical arm, a second mechanical arm, an auxiliary mechanical arm, a storage battery and an operation scene. Monitoring equipment of the monitoring system includes a temperature and humidity sensor, a pressure sensor, a current collector, a voltage collector, a data collection card, a panoramic camera, a binocular camera and a depth camera, data which are collected by the temperature and humidity sensor, the pressure sensor, the current collector and the voltage collector are compared with corresponding safe range values, if the current collected data are within corresponding safe ranges, the hot-line working robot is normally operated, and if the current collected data are not within the corresponding safe ranges, corresponding warning messages are sent. According to the operation monitoring system, operation personnel can remotely monitor the robot to work on line through the monitoring system, so that the safety of the operation personnel is guaranteed.

A subcooling heat exchanger and subcooling expansion valve in a refrigeration system provide subcooling of a pre-subcooled portion, for refrigerating a thermal load, of condensed refrigerant liquid by a pre-subcooling portion of the condensed refrigerant liquid. The amount of subcooling of the pre-subcooled portion is determined by measuring, with a pressure sensor, refrigerating suction pressure exerted by refrigerating compressors of the system. A controller then controls, based on the refrigerating suction pressure, modulation of mass of pre-subcooling portion, relative pre-subcooled portion, and expansion thereof in the subcooling expansion valve, which controls the amount of refrigerant heat exchanged, and therefore subcooling of pre-subcooled portion, between the pre-subcooling portion and the pre-subcooled portion in the subcooling heat exchanger. The pre-subcooling portion is then subsequently compressed by a subcooling compressor.

A pressure sensor includes a sensor chip for detecting pressure; a casing for accommodating the sensor chip; and an atmosphere introduction port for introducing an atmosphere pressure as a reference pressure into the sensor chip. The atmosphere introduction port is disposed on the casing. The casing includes a groove for discharging a water drop adhering around the atmosphere introduction port to an outside of the casing. The sensor without any filter can prevent the water drop from penetrating into the atmosphere introduction port.

The invention relates to the technical field of automobiles, in particular to a composite tire pressure monitoring method and a tire pressure monitoring device. The composite tire pressure monitoringmethod comprises: acquiring a first rotational speed of a first tire in which a pressure sensor is installed, and a second rotational speed of a second tire in which a pressure sensor is not installed; reading a first tire pressure value of the first tire detected by the pressure sensor; adjusting an initial tire pressure rotational speed relationship according to the first rotational speed and the first tire pressure value, to obtain a real-time tire pressure rotational speed relationship, wherein the initial tire pressure rotational speed relationship is calibrated as the corresponding relationship between the tire pressure value and the rotational speed in the initial state; obtaining a second tire pressure value of the second tire using the second rotational speed and the real-time tire pressure rotational speed relationship. In the scheme, the tire pressure value of each tire can be obtained in real time and accurately, and the corresponding relationship between the tire pressurevalue and the rotational speed can be obtained by calibrating the tire pressure value and the rotational speed in advance, thereby reducing the complexity of obtaining the second tire pressure and further reducing the energy consumption of the system.

The invention discloses a key-dialing switch testing device and a testing method thereof. The key-dialing switch testing device comprises a product fixing mechanism, a testing mechanism, a control system and a slide rail driving mechanism electrically connected with the control system; the testing mechanism is installed on the slide rail driving mechanism, the testing mechanism and the product fixing mechanism are opposite to each other; the testing mechanism comprises a bent fixing plate, a bent sliding plate, a first connector, a second connector and a dual-way pull-pressure sensor electrically connected with the control system. The key-dialing switch testing device and the testing method thereof replace the traditional manual detection mode, the switch sliding force and the switch travel of the key-dialing switch can be accurately detected, the detection is reliable, the manpower is saved, and the detection cost is low.

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 discloses a band sawing machine and belongs to the field of band sawing machines. The band sawing machine comprises a machine bed. The machine bed is composed of a fixed mchine bed body and a movable machine bed body, and the height of the fixed machine bed body is consistent with the height of the movable machine bed body. Stand columns are arranged on the fixed machine bed body and the movable machine bed body respectively. Saw frames are arranged on the stand columns. Belt wheels are arranged in the saw frames. A band saw blade is wound on the belt wheels. Pressure sensors are arranged at the positions wherein the belt wheels make contact with the band saw blade. A workpiece storage table is arranged on the portion, on the inner sides of the stand columns, of the fixed machine bed body. A clamping device is arranged on the workpiece storage table. A cylinder driving device is connected to and arranged on the clamping device. A numerical-control device is arranged on the fixed machine bed body. According to the band sawing machine, the band saw blade can be mounted conveniently and rapidly; in addition, damage to the band saw blade is avoided during mounting, and cost for purchasing band saw blades is reduced.

A three-dimensional pressure sensor detecting granary reserves comprises a shell, at least three pressure sensor units and a circuit board. The shell possesses an X direction, a Y direction and a Z direction. At least one of the at least three pressure sensor units is arranged along the X direction, at least one unit is arranged along the Y direction and at least one unit is arranged along the Z direction. The circuit board is arranged in the shell. Each pressure sensor unit comprises an elastic membrane sheet and a substrate. The substrate and the elastic membrane sheet are fixed to the elastic membrane sheet with an interval. The substrate is provided with a thick membrane electrode. The thick membrane electrode is two annular conduction bands which are printed on the substrate. The two annular conduction bands are used as an inner electrode and an outer electrode. The elastic membrane sheet and the inner electrode form a reference capacitor and the elastic membrane sheet and the outer electrode form a work capacitor. The circuit board comprises a demodulator module, an adjusting amplification circuit, a single chip microcomputer and a 485 output module. The sensor of the invention can simultaneously detect three stress information of a three-dimensional space.

The invention provides an electronic pressure controller, comprising a box body component and a flexible joint which are mutually and fixedly connected. Flow valve assemblies capable of oppositely and axially moving are arranged inside the box body component and the flexible joint; an inducting circuit board assembly and a main control circuit board assembly are fixed on the box body component (6); the inducting circuit board assembly is internally provided with a Hall switch and a pressure sensor; the main control circuit board is internally provided with an LED and a control button; and the electronic pressure controller can be conveniently installed by using a threaded clamping ring and a rubber gasket which are arranged in the flexible joint. The invention has the advantages that the flexible joint is convenient to install and the pressure sensor can accurately display pressure change of a water pump system through an LED display panel; a user can autonomously set the starting pressure through the LED display; a control circuit adopts a singlechip circuit, can be additionally provided with other functions according to the requirements of customers without changing the design of the circuit board; and the service of the water pump system can be prolonged by the temperature control protection.

The invention provides a method, device and system for identifying front and rear wheel positions of tire pressure sensors. The method includes the steps that first sensing signals used for representing the first angle positions of the tire pressure sensors, second sensing signals used for representing the second angle positions of the tire pressure sensors and corresponding tire pressure sensor identification codes are obtained; a first frequency of the obtained first sensing signals, a second frequency of the obtained second sensing signals and the corresponding tire pressure sensor identification codes are recorded; and according to the first frequency of the obtained first sensing signals, the second frequency of the obtained second sensing signals and the corresponding tire pressure sensor identification codes, the front and rear wheel positions of the tire pressure sensors corresponding to the identification codes are determined. Therefore, under the condition that cost is not increased, the complexity degree of processing of identified data of the front and rear wheel positions of the tire pressure sensors is reduced.

The invention relates to a system of power test, and the objective is to provide an air-fuel mixed power test system. In the test system, an eddy current dynamometer is connected with a pneumatic engine, a hydraulic dynamometer is connected with an internal combustion engine; and the test system also includes a gas tank for storing high pressure gas, the gas tank is connected with a heat exchanger, a stable pressure box and a pneumatic engine in order via pipelines; high-temperature discharging pipelines of the internal combustion engine is connected with the heat exchanger, exchanging heat with high pressure gas by the heat exchanger and communicationg with the atmosphere; a pressure sensor is provided on the stable pressure box, pipelines of the gas tank outlet is provided with an air flow meter, high pressure gas pipelines of both sides of the heat exchanger is provided with a thermocouple respectively; and all the pressure sensor, the air flow meter and the thermocouple are connected with a computer. The invention provides feasible test system for verifying validity of the air-fuel mixed power test system theoretical derivation, being able to provide reliable experimental parameters for implementation of more advanced air-fuel mixed power system in the future.

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.