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82results about How to "Timely alert" patented technology

Multi-rotor type unmanned aircraft system with fire detecting function

The invention provides a multi-rotor type unmanned aircraft system with a fire detecting function. Six engine arms and a frame form a body frame of the multi-rotor type unmanned aircraft system; a motor and an electronic speed regulator are connected with each other to control the rotation speed of propeller blades; a landing gear is used for an aircraft to stably land during landing; an unmanned aircraft flight control system is used for controlling stable postures of the aircraft; a sensor is connected with the unmanned aircraft flight control system; a small-sized control computer is connected with laser distance measuring sensors through communication; a processed signal is input into the unmanned aircraft flight control system to control three-dimensional positions and postures of the aircraft indoors; high-definition cameras are connected with an image transmitting device to collect video images of environment; and the image transmitting device is used for transmitting a video image signal to a ground station device so as to realize real-time observation. The multi-rotor type unmanned aircraft system with the fire detecting function, provided by the invention, is advantaged in that the multi-rotor type unmanned aircraft system can autonomously fly under a complicated environment, automatically detect fires in real time, automatically avoid obstacles and protect personal safety; remote monitoring and remote real-time communication are realized; data can be saved and replayed and so on.
Owner:湖北省机电研究设计院股份公司

Automatic monitoring and alarming system for vehicle traffic safety

The invention relates to an automatic monitoring and alarming system for vehicle traffic safety. The automatic monitoring and alarming system comprises a vehicle-mounted system, a group vehicle monitoring system and a wireless communication system, wherein the vehicle-mounted system is arranged inside a vehicle, the group vehicle monitoring system administrates vehicles, and the wireless communication system keeps real-time communication between the vehicle-mounted system and the group vehicle monitoring system. The vehicle-mounted system is connected with a camera module, a sound pickup, a flammable and combustible material detection module, a GPS module, a vehicle control unit, an alarming system and the wireless communication system. When the vehicle-mounted system finds that the vehicle is about to or has been stolen, the group vehicle monitoring system is automatically informed through the wireless communication system, and the group vehicle monitoring system is made to inform the public security and group related personnel while the alarming system is made to work; the group vehicle monitoring system achieves vehicle control in an automatic intelligence or artificial direct intervention mode through the wireless communication system in necessity, and safety of a driver and safety of legal workers on the vehicle are protected to the maximum extent. The automatic monitoring and alarming system can rescue vehicles in danger through the group and the public security in time.
Owner:FUZHOU UNIVERSITY

Sea environment quality monitoring system based on Phidgets sensing control

InactiveCN102307399AAchieve standard evaluationTimely analysis and forecastNetwork topologiesNetwork terminationLongitude
The invention provides a sea environment quality monitoring system based on Phidgets sensing control. The system comprises a Phidgets sensor network terminal node, a gathering node, a gate node, a background monitoring system and a client. The Phidgets sensor network terminal node collects data through a sensor adapter, and transmits the data to the gate node through an adaptive router and a multi-hop relay. The gate node packing the data after gathering the data by the gathering node, and forwards the data to a background database of the background monitoring system, and outputting a result by the client in a mode of latitude and longitude coordinates by utilizing Gmap technology. According to the invention, the Phidgets sensing control is employed, and through the sensor adapter, sea environment information is displayed through latitude and longitude coordinates. The invention has the following main innovations: (1) simulating a real sea geographical environment; (2) simplifying traditional sea environment monitoring and evaluation business working modes and methods; (3) constructing a sea environment monitoring database, issuing sea natural environment and calamity analysis forecasts and alarms timely, and automatically analyzing a sea red tide monitoring index.
Owner:DALIAN YACHUANG TECH

Device for measuring scouring depth of pier downstream river bed

The embodiment of the invention provides a device for measuring a scouring depth of a pier downstream river bed. The device comprises a floating body, an anchoring system, a positioning system, a propulsion system and a control system. The floating body floats on the water surface above a measured bed surface, an ultrasonic distance measurement instrument on the floating body measures the height value between the floating body and a measuring point on the surface of the measured river bed and transmits the height value to the control system. The positioning system is arranged on the anchoring system and the floating body, calculates three-dimensional space coordinates of the floating body and transmits the three-dimensional space coordinates to the control system. The control system calculates three-dimensional space coordinates of the measuring point on the surface of the measured river bed. According to the device, the floating body replaces a ship to serve as a carrier for measuring the local scouring depth, the device has the advantages of being fully automatic and running in all weather, and all-day 24-hour continuous autonomous measurement can be performed. The safety of operators or the instrument is not endangered when the measurement is performed under the flood conditions. Therefore, it is guaranteed that prior to the scouring endangering bridge safety, an alarm is given timely, and the basis is provided for bridge protection and traffic control.
Owner:BEIJING JIAOTONG UNIV

Water and fertilizer control system based on Internet of things

The invention provides a water and fertilizer control system based on the Internet of things. The system comprises a power supply, a control unit, a monitoring module, a storage module and a construction module; the power supply is electrically connected with the control unit, the control unit is electrically connected with the monitoring module, the storage module and the construction module, and the monitoring module comprises a humidity monitoring sensor, a temperature sensor and a soil measuring unit; the soil measuring unit comprises a soil moisture sensor, a soil hygronom, a soil temperature sensor and a soil salinity sensor; the storage module comprises a central management database, a data management server and a data management platform, the construction module comprises a water pump, a fertilizer spraying machine, an alarm and a signal lamp, the control unit comprises a controller and a control switch, and the control unit is electrically connected with a remote control end through a wireless receiving and transmitting device. According to the water and fertilizer control system based on the Internet of things, the design is reasonable, convenience is brought to agricultural water and fertilizer control, and the system is more suitable for modern agricultural planting.
Owner:北京中农绿源智慧农业有限公司

Auxiliary drainage structure and building drainage system

The invention relates to the technical field of drainage, in particular to an auxiliary drainage structure and a building drainage system. The auxiliary drainage structure comprises a shell, an innertube and a reaming and cutting device. A first butt joint structure and a second butt joint structure are correspondingly arranged at the upper end and the lower end of the shell. The inner tube is disposed in the shell. The reaming and cutting device is disposed on the inner wall of the inner tube, and the reaming and cutting device comprises reaming and cutting tracks and reaming and cutting blades. The reaming and cutting tracks are fixedly disposed on the inner wall of the inner tube, and each of the reaming and cutting tracks is provided with at least one reaming and cutting blade and thereaming and cutting blades are movable on the reaming and cutting tracks. An excitation structure is further disposed between the inner tube and the shell, and the excitation structure includes a plurality of sets of excitation teeth. The auxiliary drainage structure can ream and cut and break solid wastes in a drain pipe through the reaming and cutting device, and occurrence of problems such asblockage of the drain pipe can be avoided; and the building drainage system is convenient to use, intelligent and efficient, can effectively monitor the entire drain pipe, and can prevent blockage andraise an alarm in time.
Owner:SHAOXING UNIV YUANPEI COLLEGE

Monitoring method for detecting meat cooking degree in real time and wireless thermometer

The invention provides a monitoring method for detecting meat cooking degree in real time and a wireless thermometer. According to meat varieties and cooking degrees, first temperature values and first barbecue time which are corresponding are set, the preset first temperature values and the preset first barbecue time are different for different meat varieties with the same cooking degree; the first temperature values and first barbecue time automatically obtained are different for the same meat variety with different cooking degrees; real-time second temperature values and second barbecue time of a meat block can be obtained according to temperature changes of a temperature detection point; and when the second temperature values are equal to the first temperature values or the second barbecue time is equal to the first barbecue time, the wireless thermometer issues an alarm prompt; the wireless thermometer includes a probe component, a transmitter and a receiver; and the probe component is used for detecting temperature signals of baked food in an oven. The method can realize setting of food cooking degrees, and has advantages of monitoring food temperature in real time, detectingfood cooking degrees and timely alarming.
Owner:佛山市双阳电子有限公司

Optical-cable cross-connecting box door lock system

ActiveCN104217481AGuarantee the safety of unlockingSimple structureIndividual entry/exit registersPower switchingRemote control
The invention provides an optical-cable cross-connecting box door lock system. The optical-cable cross-connecting box door lock system comprises a lock body, a cabinet door touch switch, a door lock instruction transmitting unit, a controller, a short message communication module, a data server and a remote control terminal; the lock body comprises a mechanical lock body, a power supply switch and an electromagnet; the door lock instruction transmitting unit is installed on a mobile terminal of a user and used for transmitting an unlocking instruction to the controller. The optical-cable cross-connecting box door lock system is simple in structure and convenient to use, not only can an optical-cable cross-connecting box be opened by directly opening the mechanical lock body, but also the unlocking instruction can be directly transmitted by utilizing Bluetooth through the mobile terminal of the user, after the unlocking instruction is compared with pre-stored user information, the unlocking operation is actuated under the situation that the user information is correct, and the remote unlocking also can be carried out through the remote control terminal. Whether an optical-cable cross-connecting box door is illegally opened or not is monitored by utilizing the cabinet door touch switch, a monitoring early warning effect is achieved, and the safety of equipment can be guaranteed.
Owner:北京立成通科技有限公司

Security early warning system for pipe gallery well lid movement

The invention provides a security early warning system for pipe gallery well lid movement. The security early warning system comprises a driven mechanism, a vibration mechanism and a detection opticalcable used for detecting vibration; the driven mechanism comprises a traction rope; the vibration mechanism comprises a cable reeling pin ratchet wheel, a first torsional spring hinge joint and a first knocking rod; the cable reeling pin ratchet wheel comprises a center shaft, a drum which is connected with the center shaft in a sleeving manner and a turntable arranged on one side of the drum; the drum is wound with one end of the traction rope; the turntable comprises multiple bulges; the first end of the first knocking rod is hinged to the first torsional spring hinge joint; the first knocking rod clings to the bulges of the turntable through the first torsional spring hinge joint; and the detection optical cable is in a movement range of the first knocking rod. By adopting the securityearly warning system provided by the invention, a weak movement signal is amplified into a regular frequency vibration signal through the vibration mechanism to be transferred to the detection optical cable, the detection optical cable transfers the vibration signal to a remote optical fiber vibration detection system, and thus the purpose of accurately and timely performing alarm is achieved.
Owner:GUANGDONG FUAN TECH DEV

Hand-held metal detector with emergency calling function and metal detection method

The invention discloses a hand-held metal detector with an emergency calling function and a metal detection method, belongs to the field of metal detectors and aims at solving the technical problem that security personnel cannot carry out emergency calling in an emergency. The hand-held metal detector structurally comprises a shell, a detection assembly, a controller, an alarm apparatus, a wireless communication module, a locating assembly, a battery assembly, an audio and video assembly, a touch display assembly and an emergency calling button, wherein the detection assembly, the controller, the alarm apparatus, the wireless communication module, the locating assembly and the battery assembly are arranged in the shell; the audio and video assembly, the touch display assembly and the emergency calling button are arranged on the shell; the audio and video assembly is used for collecting current video and audio; the touch display assembly can be used for touch regulation and control and can be used for displaying the video, the audio, the locating signal intensity and the wireless signal intensity; and the audio and video assembly, the touch display assembly and the emergency calling button all are connected with the controller. According to the method, metal detection is carried out by adopting the hand-held metal detector. Through the hand-held metal detector, the security personnel can carry out emergency calling, and fast alarming is achieved.
Owner:JINAN ZHIAN TECH DEV +2

Urban alarm situation monitoring system based on IoT (Internet of Things)

The invention relates to an urban alarm situation monitoring system based on the IoT (Internet of Things), which comprises a central server. The central server is connected with a manager mobile phone, a cloud server and a LoRa gateway; the LoRa gateway is connected with an urban monitoring terminal; the urban monitoring terminal is connected with a power supply module; the LoRa gateway comprisesan embedded microprocessor; the embedded microprocessor is connected with an RS485 serial port, a second LoRa radio frequency transceiving module and a network communication module; the urban monitoring terminal comprises an MCU; the MCU is connected with a camera, a temperature monitoring module, a humidity detection module, an air quality detection module, a first LoRa radio frequency transceiving module, a positioning module, a state indication lamp, a power supply interface and an alarm button; the power supply module comprises a power supply switching module; the power supply switching module is connected with a high power lithium battery and a municipal power supply interface; and the high power lithium battery is connected with a solar panel assembly and a wind power generation assembly. The urban alarm situation monitoring system has the advantages of safety, reliability, convenience in information remote transmission and convenience in alarm situation disposal.
Owner:河南汇纳科技有限公司

Instant rockburst monitoring and early warning system and method

The invention discloses an instant rockburst monitoring and early warning system and method. The system comprises an infrasound microphone, a central processing module, a data acquisition unit and a microcomputer, the infrasound microphone is movably arranged on the to-be-monitored working face and used for receiving rockburst inoculation infrasound signals of the to-be-monitored working face andthe vicinity of the to-be-monitored working face and converting the rockburst inoculation infrasound signals into electric signals; the central processing module is connected with the infrasound microphone and is used for amplifying and filtering the electric signal after receiving the electric signal; the data acquisition unit is connected with the central processing module and is used for converting the electric signal processed by the central processing module into a digital signal; and the microcomputer is connected with the data acquisition unit and is used for analyzing and processing the digital signal after receiving the digital signal and sending an alarm instruction according to a processing result. The movable monitoring infrasound microphone is used for collecting rock mass fracture state infrasound signals in the rock burst inoculation process, more accurate monitoring data can be obtained, and rock burst can be accurately monitored.
Owner:JIANGXI UNIV OF SCI & TECH

Low-power consumption multifunctional fall detection alarm system

The invention relates to a low-power consumption multifunctional fall detection alarm system. The system includes a pose detection belt unit, a multifunctional detection vest unit, a left foot multipoint pressure detection insole unit, a right foot multipoint pressure detection insole unit and a mobile application client; the pose detection belt unit is used for controlling corresponding detection devices according to different working modes selected by a user, and carrying out sleep respiration detection and giving an alarm according to detection results; the multifunctional detection vest unit is in wireless connection with the pose detection belt unit and is used for detecting whether a person falls down according to the change of acceleration and pressure; the left foot multipoint pressure detection insole unit and the right foot multipoint pressure detection insole are used for detecting whether the person falls down according to the change of pressure; and the mobile application client is used for the user to select different detection modes. With the low-power consumption multifunctional fall detection alarm system of the invention adopted, whether a wearer in a house falls down can be detected and judged; respiration monitoring can be performed on the sleep of the wearer; alarm information can be emitted to a guardian or the wearer through a positioning module, an alarm module and a mobile communication module; when the wearer falls down, timely rescue can be provided; and when the respiration of the wearer in sleep stops temporarily, timely warning can be provided.
Owner:INST OF BIOMEDICAL ENG CHINESE ACAD OF MEDICAL SCI

State analysis method for transformer in power grid based on weighted Mahalanobis distance discrimination

The present invention relate to a state analysis method for a transformer in a power grid based on weighted Mahalanobis distance discrimination, and belongs to the monitoring control and early-warningfield of power supply units. The gas contents of H<2>, CH<4>, C<2>H<6>, C<2>H<4> and C<2>H<2> during operation of the transformer are collected to reflect the signals of medium-low temperature faults, high temperature faults, low energy discharge, high energy discharge or a normal state of the transformer. According to the obtained H<2>, CH<4>, C<2>H<6>, C<2>H<4> and C<2>H<2> gas contents, a reference vector is established; different weights are assigned to different elements in the detected gas content vector; then state categories of the gas contents are discriminated by the weighted Mahalanobis distance, which can be divided into a medium-low temperature fault, a high temperature fault, low energy discharge, high energy discharge and a normal state. The invention can accurately judge the working condition of the transformer by collecting and analyzing the contents of different gases in transformer oil, and can timely give an early warning or alarm for the fault state of the transformer.
Owner:INST OF BIG DATA RES AT YANCHENG OF NANJING UNIV OF POSTS & TELECOMM

Human body temperature measuring system based on face recognition

The invention discloses a human body temperature measuring system based on face recognition. The human body temperature measuring system comprises a base and a supporting rod; the bottom of the supporting rod is fixedly installed on the base; a gravity sensor is mounted in front of the supporting rod; a control box is fixedly mounted at the top of the supporting rod; a main board is arranged in the control box; an MCU is arranged in the main board; and a positioning camera, an infrared thermometer and a signal indicator lamp are arranged outside the control box. The human body temperature measuring system can strictly identify the identity of a user, automatically measure and record data and provide traceable data information when unattended. A human body temperature measuring method comprises the steps of starting a whole temperature measuring device by sensing the gravity of a person through the gravity sensor; determining a face position through the positioning camera; measuring thebody temperature of the human body through the infrared thermometer; and classifying and storing the body temperature data of each person through a storage module. Therefore, the identity of each human face is accurately recognized, and the beneficial effect of solving the problem of replacing temperature measurement of other people with fake names is achieved.
Owner:HEBEI TIMES ELECTRONICS LTD

Sleep monitoring and sleep regulation-and-control device based on human body multimode signals

The present invention relates to a sleep monitoring and sleep regulation-and-control device based on human body multimode signals. The sleep monitoring and sleep regulation-and-control device comprises a sleep regulation-and-control bed, and a sleep monitoring unit and a sleep regulation-and-control unit arranged on the sleep monitoring unit in a matching manner; the sleep monitoring unit comprises a signal measuring sensor, a sensor state detection circuit, an analog signal amplifying and filtering circuit, a first analog-to-digital converter and a multi-core digital processor; one end of thesignal measuring sensor is connected with the sleep regulation-and-control bed, and the other end of the signal measuring sensor is electrically connected with the sensor state detection circuit; thesensor state detection circuit is electrically connected with the analog signal amplifying and filtering circuit; the analog signal amplifying and filtering circuit is electrically connected with thefirst analog-to-digital converter; the first analog-to-digital converter is electrically connected with the multi-core digital processor; the multi-core digital processor is electrically connected with the sleep regulation-and-control unit; and the sleep regulation-and-control unit comprises a micro-current stimulation module, a light regulation module, a somatosensory vibration module and a temperature control module. The sleep monitoring and sleep regulation-and-control device can detect sleep and improve sleep quality of users.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA

Sulfuric acid cooler circulating water pH detecting equipment

The invention relates to sulfuric acid cooler circulating water pH detecting equipment which is simple in structure and capable of giving an alarm in time. The sulfuric acid cooler circulating water pH detecting equipment is composed of a sulfuric acid cooler, a pH meter, a PLC system, an alarm, an electromagnetic valve and a detecting water circulating device; the PLC system is provided with a threshold setting unit; the electromagnetic valve is arranged between a sulfuric acid cooler circulating water outlet and a pipeline branch connected with the pH meter and connected with the signal output end of the PLC system; the detecting water circulating device is formed by sequentially connecting a recycle water pool, a recycle water pump, a circulating water pool and a circulating water pump; a pH meter detecting water outlet is connected with the recycle water pool. According to the sulfuric acid cooler circulating water pH detecting equipment, acid water is prevented from flowing into other equipment, corrosion to the other equipment and pipelines is prevented, the reaction speed and maintenance speed of a sulfuric acid cooler fault are increased, the maintenance efficiency is improved, about 100 tons of circulating water can be recycled every day through the arranged pH meter detecting water circulating device, and therefore not only is environmental protection achieved, but also benefits are created for enterprises.
Owner:TIANJIN BODA SULFURIC ACID IND

Multi-target respiratory heart rate monitoring method and system based on millimeter wave radar technology

The present invention relates to a multi-target breathing and heart rate monitoring method and system based on millimeter-wave radar. The millimeter-wave radar module performs non-contact heart rate and respiration rate detection, which avoids cumbersome contact monitoring procedures and does not offend the detected ones. user's privacy. Compared with the non-contact detection technology in the prior art, the present invention improves the detection accuracy and greatly enhances the reliability of the measurement. The present invention monitors and analyzes the breathing and heart rate data of the monitoring object in real time through the vital signs monitoring platform, which can prevent the monitoring object from sudden unexpected diseases, or provide timely alarms in the event of an emergency; medical staff can timely monitor the vital signs through the vital signs monitoring platform Master the vital signs data of the monitoring object, timely evaluate the physical condition of the monitoring object and give professional opinions and suggestions; the family members of the monitoring object can obtain the health report of the monitoring object through the vital signs monitoring platform, and follow the professional guidance. Nursing the monitoring objects.
Owner:HUAQIAO UNIVERSITY

LED lamp line assembling machine

The invention relates to an LED lamp line assembling machine. The LED lamp line assembling machine comprises a machine tool plate, a line peeling structure, a grabbing structure, a welding structure, a glue sealing structure, a glue solidifying structure, a line unreeling mechanism and a line reeling mechanism, wherein the line peeling structure is arranged on one side of the machine tool plate; the grabbing structure is arranged on one side of the line peeling structure; one side of the grabbing structure is connected with the machine tool plate through a line shaft, and the welding structure is arranged on the other side of the grabbing structure; the other side of the welding structure is connected with the glue sealing structure through a shaft pipe; one side of the glue sealing structure is connected with the glue solidifying structure through the shaft pipe; the line unreeling mechanism is arranged on one side of the line peeling structure; and the line peeling structure, the grabbing structure, the welding structure, the glue sealing structure, the glue solidifying structure, the line unreeling mechanism and the line reeling mechanism are respectively and fixedly connected with the machine tool plate, and are respectively and horizontally connected through the shaft pipe.
Owner:东莞市高龙电子科技有限公司

Intelligent call-for-help device and implementation method thereof

The invention relates to an intelligent call-for-help device and an implementation method thereof. The intelligent call-for-help device comprises a gyroscope, an acceleration detection module, a data processing module, a call-for-help module and a display module, the gyroscope is used for detecting the posture of a user, detecting a magnitude of angular velocity in real time and sending the posture of the user and the magnitude of angular velocity to the data processing module; the acceleration detection module is used for detecting acceleration magnitude in real time and sending the acceleration magnitude to the data processing module, the data processing module is used for judging whether the acceleration magnitude exceeds a preset acceleration magnitude, calling the call-for-help module to send a call-for-help message to an emergency contact according to the contact information of the pre-stored emergency contact and calling for the display module to display the pre-stored basic information of the user and a pre-stored emergency treatment method of the user in real time when the acceleration magnitude exceeds the preset acceleration magnitude. The display module displays the basic information of the user and the emergency treatment method of the user, to guarantee the smooth treatment and cure.
Owner:MICRO CLOUD WUHAN TECH CO LTD

Somatosensory-based drowning alarm device and method thereof

The invention relates to an alarming device, in particular to a drowning alarming device and the method of the drowning alarming device, and designs a drowning alarming device based on body feeling and the method of the drowning alarming device in detail. The drowning alarming device based on body feeling comprises a power supply module providing power for the drowning alarming device, an acceleration sensor module, a water pressure sensor, a microprocessor and an alarming unit, wherein the acceleration sensor module is used for detecting the acceleration of human motion and judging the motion range of human body, the water pressure sensor is used for detecting the pressure of the human body in water and judging the depth of the human body in the water, the microprocessor is used for reading and processing the data detected by the acceleration sensor module and the water pressure sensor and judging whether drowning exists, and the alarming unit is used for sending alarms according to the judging result of the microprocessor. The method of the drowning alarming device based on body feeling comprises the following steps that whether the depth of human body in water larger than 50 centimeters is detected; the accelerated speeds in three directions of the human body in the water are detected and processed through a three-axis acceleration sensor, and whether a user is in a drowning state is judged; alarming information is given out through an alarming unit.
Owner:ZHEJIANG UNIV CITY COLLEGE

Power system database data exception monitoring method and device and electronic equipment

The invention is suitable for the technical field of power data processing, and provides a power system database data exception monitoring method and device and electronic equipment, wherein the method comprises the steps of obtaining a to-be-monitored data table in a data table of a power system and a source business system database corresponding to the to-be-monitored data table; determining a business relationship of the to-be-monitored data table according to a source business system database corresponding to the to-be-monitored data table; and according to a preset monitoring condition corresponding to the service relationship with the to-be-monitored data table, monitoring each piece of data in the to-be-monitored data table, and when it is monitored that a certain piece of data in the to-be-monitored data table is abnormal, sending an abnormality prompt message indicating that the piece of data is abnormal to the terminal equipment. According to the invention, the to-be-monitored data table is monitored based on the business relationship of the to-be-monitored data table, the abnormal monitoring result can be obtained in time, and alarm and correction can be carried out based on the abnormal monitoring result, so that the accuracy of the data in the data table in the data-in-station is improved.
Owner:STATE GRID HEBEI ELECTRIC POWER CO LTD +1

Electromechanically-integrated gas density relay and system

The invention discloses an electromechanically-integrated gas density relay and system. The gas density relay comprises a mechanical part and an electronic part. The mechanical part comprises a pressure detector, a temperature compensation element and a signal generator. The electronic part comprises a pressure sensor, a temperature sensor, a microprocessor and a first electronic signal contact. The first electronic signal contact is connected with the signal generator in series or in parallel, or is connected to a control loop corresponding to the signal generator in series or in parallel. The microprocessor is connected with the pressure sensor and the temperature sensor to obtain a pressure value and a temperature value and process the pressure value and the temperature value to obtaina gas density value; the microprocessor is further connected with the electronic signal contact, and when the monitored gas density value is smaller than or larger than a set density value, the microprocessor receives a first notice contact signal output when the first electronic signal contact acts. By means of the gas density relay, the gas density value of electrical equipment can be accuratelymonitored to find gas leakage in time, and thus the safe operation of a power grid is guaranteed.
Owner:SHANGHAI ROYE ELECTRICAL CO LTD
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