15 results about "Buzzer" patented technology

The invention discloses an intelligent height measuring instrument which comprises a mobile phone terminal 1, a distance measuring device, and a horizontal reference rod 2 installed on the distance measuring device. The distance measuring device is connected with the mobile phone terminal 1, and is a structure according to which a distance measuring processing chip 4, an ultrasonic transducer 6, a buzzer 7, an LED indicator light 8 and a horizontal angle transducer 9 are fixedly installed in a shell 3. The ultrasonic transducer 6, the buzzer 7, the LED indicator light 8 and the horizontal angle transducer 9 are electrically connected with the distance measuring processing chip 4 respectively. The horizontal reference rod 2 is fixedly installed on the shell. The intelligent height measuring instrument has the advantages of being easy to operate, capable of automatically adjusting balance and recording data and high in practicability.

A device includes: a controller that converts a pressure value detected by a pressure detector into visual or aural lingual pressure information changed depending on a magnitude of the pressure value; and an information output unit, such as a buzzer and a color display LED, that outputs the lingual pressure information in response to a signal from the controller. The information output unit outputs lingual pressure information different depending on a pressing force applied on an elastic balloon by a tongue, allowing users such as patients and elderly people to continue a training without being bored.

The invention discloses an outdoor public place pre-ordering apparatus, which belongs to the field of electronic products. The outdoor public place pre-ordering apparatus comprises a microcontroller and peripheral equipment, a liquid crystal display screen, a battery box, a buzzer, a mechanical encryption lock, a housing and five keys; a power supply is connected with the microcontroller and the liquid crystal display screen; the keys are connected with the microcontroller as input ends; the liquid crystal display screen and the buzzer are connected with the microcontroller as output ends; the fives keys, the liquid crystal display screen, the buzzer and the microcontroller are connected and arranged in the housing; and the mechanical encryption lock is fixed on the battery box. The outdoor public place pre-ordering apparatus has pre-ordering, querying, verifying, stopwatch and countdown functions, and can bring great convenience to the life, entertainment, study and scientific research of people.

The invention discloses a squeezing safety and automatic alarm device of a diaphragm filter press. According to the device, a PLC (Programmable Logic Controller) is arranged to automatically control the operation; a digital display pressure controller is arranged on an oil cylinder body of a hydraulic system; an intelligent pressure transmitter is arranged on a diaphragm squeezing water pipeline;the digital display pressure controller and the intelligent pressure transmitter are connected with the PLC; a pressure switch is connected with the intelligent pressure transmitter; a text display device is connected with the PLC; a buzzer alarm is connected with the PLC; a squeezing pump switch is connected with the intelligent pressure transmitter; a hydraulic pump switch is connected with thedigital display pressure controller; the digital display pressure controller is installed on the oil cylinder body of the hydraulic system; and the digital display pressure controller is provided witha pressure contact lower limit, a pressure contact upper limit and a pressure contact ultimate upper limit. According to the invention, the use safety of the whole equipment of the diaphragm filter press is ensured, a burst accident is avoided during squeezing of a diaphragm filter plate, the safety of personnel on a working site is ensured, and the economic benefit is improved.

The invention discloses a water cooling heat dissipation fan which comprises a shell; universal wheels are arranged at the bottom of the shell; a drainage plug is arranged at the bottom in the shell;an air inlet is formed in the right side wall of the shell; an air outlet is formed in the left side wall of the shell; a micro pump is installed at the bottom in the shell; a fan body is installed ina positioning ring and comprises a motor and fan leaves at the output end of the motor; a buoyancy ball switch is installed at the position, close to the bottom of the shell, on inner side wall of the shell; and a buzzer is installed on one side of the top of the shell. For the water cooling heat dissipation fan provided by the invention, the micro pump is utilized to continuously provide water to a wet cloth curtain, so that the wet cloth curtain keeps wet; when the fan body works, external air passes through the air inlet, then passes through the wet cloth curtain and finally flows toward the air outlet through an air outlet pipe, and the air after being wetted and cooled is sprayed out through the air outlet, so that the effect of water cooling is realized, the movability is greatly improved, the water shortage phenomenon is avoided, and the water cooling heat dissipation fan has very high practicability.

The invention relates to an online monitoring and warning device for preventing an electric transmission line from being damaged by an external force. The online monitoring and warning device comprises a laser emitting device and a laser receiving device, wherein the laser emitting device comprises a first host tank, three laser devices are mounted at the top of the first host tank, and a first fixing plate is arranged on the back surface of the first host tank; and the laser receiving device comprises a second host tank, a left auxiliary machine tank and a right auxiliary machine tank, a laser inductor is arranged on the front surface of each of the second host tank, the left auxiliary machine tank and the right auxiliary machine tank, a control panel and a short message module are arranged in the second host tank, a buzzer is arranged close to each laser inductor, and an antenna is arranged outside the second machine tank. According to the online monitoring and warning device, an electrified body safety region is formed as required between two pole towers by virtue of multiple light beams when the wiring and operation states of electrified bodies of equipment and wires of primarypole towers are not changed, laser is received through the induction of the laser inductors and cannot be received because of the invasion of a foreign matter and the out-of-limit of the wire, and the online monitoring and warning device can timely and locally warn, and management staff can be informed through short messages.

The invention discloses an automatic wind energy daily bird repelling device. The device comprises a rod body, wherein a mounting box is fixedly arranged at the top end of the rod body, a mounting cavity is formed in the mounting box, a plurality of main shafts are rotatably arranged in the mounting cavity, two magnets are symmetrically and fixedly arranged on the side walls of the main shafts, and power supply devices are fixedly mounted on the left cavity wall and the right cavity wall of the mounting cavity, each power supply device comprises two fixing rods, one ends of the plurality of fixing rods are fixedly connected with the inner side wall of the mounting cavity, coils are fixedly wound around the plurality of fixing rods, a buzzer is arranged in the mounting cavity, a mounting groove is formed in the upper surface of the mounting box, a photoresistor is arranged in the mounting groove, and the photoresistor is electrically connected with the buzzer and the coils to form a complete current loop. The bird repelling device can automatically work in the daytime and cannot work at night, and the phenomenon that the buzzer makes a sound at night to disturb residents is avoided.

The remote fire composite detector comprises a shell, a battery module, a sensor module and a circuit board, the sensor module comprises a CO sensor, a particulate matter sensor and a TVOC gas sensor, the shell is divided into an upper layer, a middle layer and a lower layer, the battery module is arranged on the upper layer of the shell, and the circuit board is arranged on the lower layer of the shell. The middle layer of the shell is provided with an LED module and a circuit board, and the lower layer of the shell is provided with a CO sensor, a particulate matter sensor, a TVOC gas sensor and a buzzer module. The system can remotely monitor and obtain an environment abnormity alarm sent by the cloud server in real time, carries out monitoring through three parameters of a PM value, a TVOC concentration and a CO concentration, can rapidly detect a signal under the conditions that more CO is generated by smoldering in the initial stage of a fire disaster, and the smoke production amount is small during combustion of part of materials, improves the possibility of fire disaster suppression and extinguishment, and improves the safety of the fire disaster. And the detector is internally provided with a high-capacity rechargeable battery, so that long-time endurance and environmental protection are realized.

The invention discloses a household early earthquake electronic alarm device. The household early earthquake electronic alarm device is characterized by comprising a 6V direct-current power source, two paths of monitor probes, a bridge balance circuit and a buzzer driving circuit. The bridge balance circuit is composed of the two paths of monitor probes, a PNP type transistor VT1, a PNP type transistor VT2, a resistor R3, a resistor R4, a linear potentiometer RP, a resistor R5 and an electrolytic capacitor C1, and a base electrode of the PNP type transistor VT 1 and an emitting electrode of the PNP type transistor VT2 are connected with the two paths of monitor probes respectively. The buzzer driving circuit is composed of an NPN type transistor VT3 and a buzzer HA. According to the technical scheme, the circuit structure is simplified, and the requirements for high monitor sensitivity and reliable work performance are achieved. Once one certain path of monitor probe is triggered, the alarm device gives an alarm through the buzzer immediately, the bridge circuit is automatically kept locked once an alarm signal rings out, and the phenomenon of error alarming or missing alarming can be basically eradicated.

A self-contained turn signal indicator unit for signaling to the hearing impaired driver of a motor vehicle that the vehicle's turn signals are activated. The indicator unit is attached to the cover of the vehicle's steering column and produces a loud audible signal and a light signal when the turn signal lever is moved to the turning position. The circuitry includes a battery, a turn switch activated by movement of the turn signal lever, and a buzzer and a lamp. A volume control, operable by a user, controls the volume of the sound. An optional timed switch for turning off the circuit has a normally closed position and has an open position for a predetermined period of time after the turn switch is closed and remains closed.