53results about How to "Realize the self-test function" patented technology

The invention discloses a UAV identification system, which includes at least one UAV, a remote control device and a management platform. The UAV includes a flight control module, a UAV identity control information module and a UAV position positioning module. The flight control module and the UAV position positioning module are respectively electrically connected to the UAV identity management and control information module; the UAV identity management and control information module and the management platform perform signal transmission through waves. The UAV identity control information module is used as a transfer station between the flight control module and the remote control device. The UAV identity control information module records the identity information of the UAV. Once the UAV identity control information module is artificially destroyed, the remote control device It is impossible to control the flight of the drone.

The invention discloses an overvoltage protection configuration system of a unified power flow controller. The system comprises a direct-current overvoltage protection device, a valve overvoltage protection device and a sub-module overvoltage protection device. The relation of protection action constant values can be expressed by a relational expression that (N*Vov2)>(N*Vov1)>Uov1>...>Uovm>Unom. The cooperative relation of protection action delay can be expressed by a relational expression that Tvo2<Tvo1<Tuo1...<Tuom. Lightning arresters and by-pass switches which are in bridge joint are configured at two ends of the circuit-side winding of a series transformer; grounding lightning arresters are respectively configured at the near bus-bar end and near circuit end of the circuit-side winding of the series transformer; grounding lightning arresters are configured at the alternating-current power grid side and converter side of a parallel transformer; and grounding lightning arresters areconfigured at the alternating current-direct current side and valve bottom of a converter. With the overvoltage protection configuration system of the invention adopted, the converter can act reliably when the system is disturbed or the sub-modules of the converter fail, and therefore, the reliability of the unified power flow controller can be improved.

The invention relates to the technical field of electric power detection, in particular to an insulation monitoring device with self-inspection and ground connection location functions. According to the insulation monitoring device, a host is connected with multiple detection modules and each detection module is connected with 16 current transformers, so that the need of long haul communication due to different protection chambers in the field is met; meanwhile, current transformers can be additionally arranged at different positions of the same feeder line, the host judges ground fault pointpositions of a field direct current system according to a signal situation that whether the current transformers at different positions are detected or not, so that an automatic precise location function when a ground fault occurs is realized, a manual troubleshooting range is shortened, and a fault point can be conveniently and quickly found; besides, the device performs self-inspection on all the current transformers regularly everyday, whether the current transformers are normal or not is monitored, and abnormal current transformers are displayed by virtue of an LCD display unit.

The invention belongs to the technical field of simultaneous hierarchical measurement of sludge and water levels and provides a device for simultaneous hierarchical measurement of water level and water-mud mixture level. The device is capable of realizing real-time detection in complex environments, high in measurement precision and safe and convenient to use. The technical scheme includes an infrared emitter and an infrared receiver are fixed between a first mounting fixing plate and a second mounting fixing plate by screws, the infrared emitter is connected with a power line through a mainframe, the infrared receiver is connected with the mainframe through a signal line, and the mainframe is connected with external equipment through the power line and the signal line. The device for simultaneous hierarchical measurement of the water level and the water-mud mixture level is applicable to the field of coal mines.

The invention discloses an 18-30 GHz front-end receiving component. The receiving component comprises a millimeter wave front-end circuit, a local oscillator circuit, a frequency mixer, intermediate-frequency circuits, and SDLVA detection circuits, the millimeter wave front-end circuit comprises four channels of a coupler, a first-level switch, a first low-noise amplifier, a second-level switch, ahigh-pass filter, a second low-noise amplifier, a front-end low-pass filter and a programmable attenuator connected in sequence, the local oscillator circuit comprises a phase-locked source, a firstbandpass filter, a first-level frequency multiplexer, a second bandpass filter and a local oscillator four-channel power divider connected in sequence, four output terminals of the local oscillator four-channel power divider are separately connected with a second-level frequency multiplexer and a third bandpass filter in sequence, each channel of the intermediate-frequency circuit comprises an intermediate-frequency low-noise amplifier and an intermediate-frequency low-pass filter connected in sequence, and each channel of the SDLVA detection circuit comprises an SDLVA and an operation amplification circuit connected in sequence. The receiving component is advantaged by high integration degree and wide operating temperature range, and the application prospect is wide.

The invention relates to a partial discharge detection pulse current sensor with a self correcting function, belonging to the technical field of sensors for detection. The technical scheme of the partial discharge detection pulse current sensor is as follows: a closed-loop magnetic core (5), an output coil and a correcting coil are arranged in a shell, the output coil wound on the closed-loop magnetic core is used for inducing a current flowing through the closed-loop magnetic core to carry out partial detection, the correcting coil is additionally arranged on the closed-loop magnetic core so as to be used for realizing self correcting and self detection functions, and the partial discharge detection pulse current sensor is provided with a correcting interface (1) and an output interface (6), the correcting interface is connected with the correcting coil, and the output interface is connected with the output coil. The shell is of various structures, comprising an opening rectangle structure and a closed round structure, and is suitable for partial discharge online routing inspection or local discharge online monitoring. The partial discharge detection pulse current sensor disclosed by the invention has the beneficial effects of realizing self correcting and self detecting functions, being suitable for local discharge online inspection or partial discharge online monitoring, and being convenient and exact.

The invention relates to the field of rail transit locomotive vehicle control electric appliances, in particular to a driver controller based on Ethernet control to solve the problem that an existing driver controller is incapable of carrying out Ethernet communication with a vehicle system. The driver controller comprises a control handle assembly, a cam assembly, a direction switch, quick-action switches, optical-electricity encoders and an Ethernet controller. The Ethernet controller comprises a shell assembly, first connectors, second connectors, a third connector, a signal conditioning circuit board assembly, a power supply circuit board assembly and a control circuit board assembly. The first connectors are connected with the quick-action switches; the signal conditioning circuit board assembly and the power supply circuit board assembly are connected with the first connectors; the second connectors are connected with the optical-electricity encoders; the control circuit board assembly is connected with the second connectors; the signal conditioning circuit board assembly and the power supply circuit board assembly are both connected with a single chip microcomputer; and the third connector is in communication with an upper computer. The driver controller based on Ethernet control is used for rail locomotives, motor train units and the like.

The invention belongs to the data acquisition technological field and discloses a multi-channel-isolated data acquisition system. The system comprises a signal conditioning circuit, an analog-to-digital conversion circuit, a power source circuit and a bus interface circuit; acquired signals are inputted through the bus interface circuit, and sequentially enter the signal conditioning circuit and the analog-to-digital conversion circuit so as to be processed by the signal conditioning circuit and the analog-to-digital conversion circuit; output signals are outputted through the bus interface circuit; the signal conditioning circuit is used for attenuating, isolating, and strobing the acquired signals under the control of channel selection signals; the analog-to-digital conversion circuit isused for performing analog signal-to-digital signal conversion on signals outputted by the signal conditioning circuit; the bus interface circuit is used for implementing the input and output of theacquired signals; and the power source circuit is used for providing required voltage signals for the signal conditioning circuit and the analog-to-digital conversion circuit. According to the multi-channel-isolated data acquisition system of the invention, the signals of various channels can be isolated from each other by means of strobing isolation and signal input and output isolation, and therefore, mutual interference between the channels and the interference of a host computer circuit connected with the channels can be eliminated.

The invention provides a switch matrix comprising a line input signal set, a column input signal set, a relay matrix array, a column relay array, a line relay array, a current source module, a MCU module, a communication module, an ADC acquisition module, and a display / upper camera stand interface module; the display / upper camera stand interface module, the ADC acquisition module and the communication module are respectively connected with the MCU module; the ADC acquisition module, the communication module, the column relay array and the line relay array are respectively connected with the current source module; each relay of the column relay array is correspondingly connected with the line input signal set and the relay matrix array one by one; each relay of the line relay array is correspondingly connected with the column input signal set and the relay matrix array one by one. The invention also provides a switch matrix self-check method so as to fast check the switch matrix problems.

The invention provides a chopper self-inspection method for a wind generator converter, and a controller. The chopper self-inspection method comprises the steps of controlling a direct current voltage loop to stop working after a starting instruction is received and after the grid side part of the wind generator converter controls a direct current bus voltage to be stable; next, controlling the grid side part of the wind generator converter to work to enable a power grid to charge the direct current side of the wind generator converter at a preset current value within a preset time so as to enable the direct current bus voltage to be greater than or equal to the switch-on voltage of the chopper; judging whether the direct current bus voltage exceeds a test protection normal range or not within a preset time in real time; and if the direct current bus voltage exceeds the test protection normal range within the preset time, controlling the wind generator converter to stop or outputting an alarming signal. Therefore, the chopper self-inspection function after startup in each time of the wind generator converter is realized, so that it is ensured that the chopper can work as normal after startup in each time of the wind generator converter; and compared with the prior art, operational reliability is improved.

The invention provides an intelligent current transformer polarity tester which is easy to operate, stable in operation and visual in test result. A reverse connection prompting circuit is connected between positive and negative signal voltage input ends, and an in-phase proportion amplifier U is connected between the positive and negative signal voltage input ends through a current-limiting resistor Rs and a resistor R2 is connected between the anti-phase input end of the in-phase proportion amplifier U and a system grounding end. The resistor R2 is connected with the negative signal voltage input end through a reverse connection diode D1. A resistor R1 is connected between the positive signal voltage input end and the negative end of the resistor R2. The output end of the in-phase proportion amplifier U is connected with the anti-phase input end of the in-phase proportion amplifier U through a feedback resistor Rf. A resistor R4 and a dry battery E1 are connected in series between the positive and negative power supply ends of the in-phase proportion amplifier U. A self-checking button AN and a dry battery E2 are connected in series between the positive and negative signal power supply input ends. A lighting indication circuit and a sound prompting circuit having a reset function are connected with the output end of the in-phase proportion amplifier U. A voltage stabilizing tube D2 is connected between the positive power supply input end of the in-phase proportion amplifier U and the system grounding end.

The invention discloses a 6-18GHz multi-channel front-end receive and transmit system. The system includes a receiving and transmitting part, a front part, an azimuth measuring part, a frequency measuring part, a transmitting source part, a self-detecting source part and a shielding box. Firstly, outer frequency signals in the range of 6-18GHz are received to the receiving and transmitting part through four antennas. And then the four signals are filtered, clipped, amplified and power distributed through the front part, some of them enter the azimuth measurement part, and the azimuth information is extracted after signal processing. The other part of the signal enters the frequency measurement part and extracts the frequency information after signal processing. Finally, the transmitting source part generates the signal with the same characteristics, and transmits the signal through the receiving and transmitting part to achieve the interference effect. The self-test source section provides a self-test signal to check that the main channel is functioning properly. The invention has the advantages of high integration, wide working frequency band and high index consistency, and has wide application prospect.

The invention discloses a remote automatic management method for a shipborne positioning terminal, and the method comprises the following steps: S1, building a national fishery radio management service platform, and customizing an encryption transmission protocol; S2, inserting the shipborne positioning terminal into AIS equipment; after being powered on, enabling the shipborne positioning terminal to carry out module initialization, module self-inspection and anomaly detection; S3, connecting the shipborne positioning terminal with a national fishery radio management service platform, and completing module filing; S4, enabling the shipborne positioning terminal to obtain the wake-up frequency in the active state from the nationwide fishery radio service platform; S5, enabling the shipborne positioning terminal to initiate a clock synchronization request to the national fishery radio management service platform; and S6, enabling the shipborne positioning terminal to obtain the card reading key from the national fishery radio service platform. According to the invention, through customization of encryption protocol transmission data information and implementation logic of the shipborne positioning terminal, all-around self-inspection and abnormity monitoring and reporting are realized, and the supervision target of one ship, one code and one device is realized.

The invention discloses a motor vehicle brake block monitoring device which comprises a control module, a display module, a warning module and a brake block working condition monitoring module, wherein the display module, the warning module and the brake block working condition monitoring module are respectively connected with the control module. Compared with the prior art, the motor vehicle brake block monitoring device achieves the function of self-detection of the motor vehicle brake block, can timely provide the working condition information for a driver, and warns the driver when the brake block is badly worn, so as to ensure normal operation of a brake braking system of a motor vehicle, reduce traffic accidents caused by brake failure, and avoid damage to safety of the lives and property of drivers and passengers.

The invention discloses a maritime search and rescue positioning terminal based on Beidou satellite communication, and the terminal automatically gives an alarm when a person falls into water or a ship is in distress. The ship name, personal information, position, time and other help seeking information are automatically sent to a search and rescue center server through the Beidou satellite according to a set period and displayed on an electronic chart, and a search and rescue center can timely organize recent search and rescue power for search and rescue after checking the dangerous situation. The positioning and communication functions of the terminal are completed based on a Beidou communication satellite, domestic autonomous controllability is realized, and the communication safety is guaranteed; in the alarm information sending and receipt receiving process, two-way transmission of search and rescue signals is achieved, and the rescue efficiency is improved; two power-on modes of alarm self-starting and manual starting can be adopted. The system is stable and reliable. The indicating lamp can display the information receiving receipt and flicker to prompt the position of a person, and functions are rich. And the equipment adopts a miniaturized design and is convenient to use.

The invention discloses a small pixel transmission and multi-information fusion high-speed security check system and a recognition method thereof. The high-speed security check system is formed by a halved belt type high-speed sorting machine and a control device for controlling the halved belt type high-speed sorting machine, wherein the halved belt type high-speed sorting machine comprises a classification device, a convey device and a sorting crossing; the control device comprises an all-dimensional bar code scanner, an X-ray check device, a light barrier switch detection subsystem, an external image collection subsystem and a physical parameter collection subsystem which are all communicated with a main control subsystem. The invention also provides a method for recognizing parcels through the small pixel transmission and multi-information fusion high-speed security check system; the system achieves a self-check function of a state of hazardous article check tester equipment and has a function of performing scientific area segment on organic matter, inorganic matter and mixture.

Disclosed is a digital magnetron power supply. The digital magnetron power supply comprises a communication module (1), a control module (2), a voltage regulation module (3), an output module (4), an input protection module (5) and a detection module (6), wherein the communication module (1) adopts a standard MODBUS-RTU communication protocol; the control module (2) is used for receiving a control instruction from the communication module (1) to regulate and control the voltage regulation module in real time, and to receive and process detection data from the detection module (6) in real time; the voltage regulation module (3) is used for receiving a real-time adjustment control instruction from the control module (2), and receiving a voltage supplied by the input protection module (5) and outputting the voltage the output module (4); the communication module (1) and the control module (2) are in bidirectional communication, so that the digital control of the magnetron power supply is realized; a PID algorithm in the control module (2) can improve stability of output power; the input protection module (5) realizes protection of mains supply input and output; and real-time fault detection for fault problems in a circuit can be realized through the detection module (6).

The invention relates to a maintenance method of an intelligent transformer station protective relaying device. The method comprises a self-maintenance process of the intelligent transformer station protective relaying device and a maintenance process of an external detection apparatus. The external maintenance process comprises arranging at least one detection interface on the intelligent protective relaying device and connecting the detection interface of the intelligent protective relaying device with a current simulation system through a cable. According to the invention, through arranging the detection interface on the intelligent protective relaying device and connecting the detection interface with the current simulation system, the state of the intelligent protective relaying device can be detected under the condition that the intelligent protective relaying device works normally.

The invention relates to an active plugging device of a connector, wherein the device is applied to a connector plug. The device comprises a direct current motor and a controller, a lead screw transmission assembly is arranged on the direct current motor, and a guide assembly is further arranged between the direct current motor and the connector plug. The active plugging device has the advantages that the lead screw transmission assembly connected with the connector plug is arranged on the direct-current motor, rotation of the direct-current motor is converted into linear motion of the lead screw through the lead screw transmission assembly, and due to the fact that the connector plug is arranged on the lead screw transmission assembly, the connector plug can be effectively controlled to carry out active plugging or active separation only by controlling the rotation direction of the direct current motor to control the motion direction of the lead screw sensing assembly, and the active plugging and active separation of the connector can be rapidly realized by adopting a direct current motor driving mode. The connector can realize the function of repeated plugging and unplugging autonomously, and is wide in application range.

The invention relates to the technical field of infrared detection, and discloses a thermopile infrared detector and a preparation method thereof. The detector comprises a silicon substrate, a first supporting layer and an absorbing material supporting layer which are sequentially arranged from bottom to top, wherein a plurality of thermocouple strips are arranged on the absorbing material supporting layer, the thermocouple strips are arranged in a double-row mode in a shape like a Chinese character 'fei' to form a thermocouple strip area, a passivation heat absorption layer is deposited on the thermocouple strips and extends downwards to the upper surface of the absorbing material supporting layer, and the edge of the thermocouple strip area is not covered with the passivation heat absorption layer; the outer sides of the thermocouple strips in the first row and the tail row are respectively provided with a heat insulation groove parallel to the thermocouple strips, and the heat insulation grooves extend downwards from the absorbing material supporting layer and penetrate through the first supporting layer; and a U-shaped platinum resistor is arranged on the passivation heat absorption layer, and two arms of the platinum resistor are perpendicular to the thermocouple strips and are respectively positioned above the inner ends of the two columns of thermocouple strips, so thatthe responsivity of the infrared detector is improved.

The invention relates to the technical field of HMDS treatment equipment, and particularly relates to an HMDS leakage-proof protection device for a spin coating developer. The device comprises an HMDS tank, a sealing protection cover, a nitrogen feeding mechanism, a rack, an air exhaust mechanism mounted on the rack, an absorption mechanism, an automatic recovery mechanism, a controller, a leakage detection sensor and an alarm, wherein the air exhaust end of the air exhaust mechanism is arranged in the sealing protection cover; the absorption mechanism is arranged on the air exhaust mechanism; the automatic recovery mechanism is arranged on the rack, and the air exhaust end of the automatic recovery mechanism is in sealing connection with the top end of the inner side of the sealing protection cover; the controller is arranged on the outer side wall of the sealing protection cover; the leakage detection sensor is arranged on the inner side of the sealing protection cover, and the leakage detection sensor is electrically connected with the controller; and the alarm is installed on the outer side wall of the sealing protection cover and electrically connected with the leakage detection sensor and the controller. Safety accidents caused by HMDS leakage can be completely eradicated, if leakage occurs, an alarm signal is sent out, raw material supply is cut off, continuous leakage is avoided, and leaked HMDS is collected.

The invention provides a cleaning type anti-mixing butterfly valve with a single butterfly plate. The cleaning type anti-mixing butterfly valve comprises the butterfly plate, two valve bodies, a sealing ring and an outer cleaning circulating system. Grooves are respectively formed in two peripheral sides of the butterfly plate, adjacent ends of the two grooves are communicated with each other, the other ends of the two grooves are respectively communicated with an inlet cleaning tube and an outlet cleaning tube via first microporous cavities, and the inlet cleaning tube and the outlet cleaning tube are respectively arranged on the two valve bodies and are communicated with the outer cleaning circulating system. The cleaning type anti-mixing butterfly valve has the advantages that residual liquid in a channel can be cleaned, sealing leak liquid also can be cleaned and can be drained from the cleaning circulating channel if leakage occurs, a self-inspection function can be realized, requirements of various driving modes such as a manual driving mode, an electric driving mode and a pneumatic driving mode can be met by driving energy of the butterfly plate, and a driving form of the cleaning type anti-mixing butterfly valve can be interchanged with a conventional butterfly valve driving form.

The invention discloses an auxiliary memory education learning device. The auxiliary memory education learning device comprises a bottom plate; the top of the bottom plate is fixedly connected with asleeve; a vertical rod is arranged in a cavity of the sleeve; the top of the vertical rod penetrates to the top of the sleeve; grooves are formed in the left side of the vertical rod; the top of the left side of the sleeve is fixedly connected with a horizontal plate; and the top of the horizontal plate is fixedly connected with a casing pipe. The auxiliary memory education learning device includes the bottom plate, the sleeve, the vertical rod, the grooves, the horizontal plate, the casing pipe, a horizontal rod, a spring, a baffle block, a pulling block, a display plate, a sliding groove, and a stretching plate which cooperate with each other; and the problem that a student holds a book to cover the content of answers while learning by using the existing learning display plate so as to achieve a self-test function and deepening the memory, but the method is inconvenient and affects the learning efficiency can be solved. The auxiliary memory education learning device can enable the stretch plate with answers to stretch and retract, and is worthy of promotion and use.

The invention relates to protective equipment of an electric power capacitor, in particular to a protector of an electronic type electric power capacitor. The invention is characterized in that a current transformer, and an electronic component are installed in a casing body; wherein, the electronic component comprises an electrical current signal detecting circuit, a power supply indication circuit, an overcharging control circuit, a severe overcharging and manual resetting control circuit, phase protecting control circuit, a driving output circuit and a power supply circuit, and other a plurality of circuits. The electrical current signal on the electric power capacitor is detected by the current transformer in a splitting phase, divided into four circuits and outputs to the power supply indication circuit, the overcharging control circuit, the severe overcharging and manual resetting control circuit and the phase protecting control circuit after being enlarged by an operational amplifier UIA and being detected, and then connected to the driving output circuit; the power supply circuit is divided into three voltage classes and connected with the inlet wire terminals and the grounding terminals of the power supplies of the four circuits. The invention has the advantages of complete protection performance, high precision and scientific control and rationalized self-returning and self-locking properties, and the invention is widely applied to the complete set of the reactive power compensation equipment.

The invention relates to the technical field of protective electric appliances, in particular to a piezoresistor with a self-checking function and a surge protector thereof. The piezoresistor with theself-checking function comprises a piezoresistor body and at least one color-changing body, wherein a color-changing body is in heat conduction connection with the piezoresistor body, the color-changing body changes color by sensing a temperature and marks the temperature condition of the piezoresistor body, so that when the temperature of the piezoresistor changes, the color of the color-changing body changes, so that the self-checking function of the piezoresistor is achieved, and workers can determine the thermal damage condition of the piezoresistor according to the color change conditionof the color-changing body, it is achieved that the piezoresistor is replaced in time after thermal damage and the normal use of the surge protector with the piezoresistor with the self-checking function is guaranteed, a circuit is cut off in time, the temperature control protection effect is achieved, the defect that fault indication is achieved mechanically in the prior art is overcome, the fault rate is lower, and the use safety of the surge protector is improved.

The invention discloses a communication method for a security and stability control system device, and the method is executed by a substation and comprises the following steps: determining a corresponding relationship between an identity label of a generator tripping execution station and a framing sequence number in a communication protocol; during power-on, judging an identity identifier of a generator tripping execution station which is put into work of the substation; if it is judged that the first all-machine execution station is put into work, determining that the data of the first all-machine execution station is included in a sub-frame corresponding to the first all-machine execution station; if it is judged that the second generator tripping execution station does not work, deleting the sub-frame corresponding to the second generator tripping execution station in the data packet to be sent to the master station; and sending the data packet to a master station. The method is improved on the basis of the communication mechanism of the current stability control device, firstly, whether useless sub-frames exist in sub-frames can be automatically identified according to the channel switching information of the device, so the sub-frames are eliminated, the total number of the sub-frames is reduced, and the communication real-time performance is improved.

The invention provides a wind turbine generator blade and bearing crack monitoring system. The system at least comprises a sensing layer and a broken line monitoring device which are arranged on the circumferential outer wall of the root of each blade and are connected through a wire, and is also provided with a wireless receiving device and an I / O interface. Each broken line monitoring device comprises a shell, an energy storage module, an on-off monitoring module and a wireless transmitting module, wherein the wireless transmitting module is connected with the on-off monitoring module and transmits signals monitored by the on-off monitoring module; and the wireless receiving device comprises a wireless receiving module and a fault state relay connected with the I / O interface, and the I / O interface is connected with a master control PLC in a cabin. The system can directly detect the blade crack condition and send out an alarm or shutdown instruction, due to a waterproof and dustproof structure of the broken line monitoring devices, the broken line monitoring devices are not prone to being affected by the environment, the detection result is accurate, various severe environment conditions can be met, and meanwhile the system has the advantages of being simple in installation process and convenient to operate.

The invention discloses a rail transit infrastructure detection child-mother group robot, belongs to the technical field of rail transit maintenance, and realizes access of a large number of detection modules by utilizing modular design of the detection modules and corresponding arrangement of a rotating cabin and an access mechanical arm; meanwhile, through corresponding arrangement of the three-dimensional storage rack, the sub-inspection robots and the receiving and sending assembly, matching of the detection modules on the corresponding sub-inspection robots is accurately achieved, rapid putting and recycling of the multiple sub-inspection robots in the operation area are achieved, and conditions are provided for conducting different operation contents in the operation area. The rail transit infrastructure detection child-mother group robot is simple in structure and easy and convenient to set, detection of different operation contents in an operation area can be achieved, the flexibility and comprehensiveness of rail transit infrastructure detection are improved, the detection efficiency and precision are improved, the infrastructure detection cost is reduced, and higher application prospects and popularization values are realized.

The invention provides a distributed-network automatic irrigation control system and an irrigation control method thereof, wherein the system carries out automatic irrigation control on agricultural, forest, commercial, industrial or urban green areas by using the combined technical means such as intensively setting and monitoring a distributed irrigation process by a central control computer, controlling the distributed irrigation process by a wireless terminal controller, a wireless network communication technique and the like; and in addition, the system also enables the data processing pressure of the central control computer to be decomposed by using a distributed irrigation control method which is implemented through the steps of intensively setting the irrigation process by the central control computer, and independently controlling each unit irrigation process by the wireless terminal controllers according to the setting, thereby avoiding a mass of real-time communication datatransmission, ensuring that the system can smoothly carry out data processing and communication, improving the execution efficiency and management efficiency of the system, decreasing the construction requirements of system hardware and wireless communication networks, and enhancing the economical efficiency and feasibility of the system applied in large-scale irrigations.

The invention discloses a self-inspection circuit and a self-inspection method of a signal acquisition loop of a vacuum degree monitoring device, which belongs to the technical field of online monitoring of electrical equipment, and includes a vacuum degree monitoring device and a self-inspection device connected to a core processing unit circuit of the vacuum degree monitoring device unit; the self-test unit includes a self-test button, a reset button, a self-test control relay, an alarm control relay, an optocoupler, a high-pass filter circuit, and a sensitivity adjustment circuit. Both the self-test button and the reset button are connected to the self-test control relay, and the self-test control The relay, the alarm control relay, the optocoupler and the alarm control module are connected in sequence, the self-check control relay controls the pulse generation module to send a pulse signal, the pulse signal enters the pulse counting module through the high-pass filter circuit and the sensitivity adjustment circuit, and the signal of the pulse counting module and the alarm control module connect. The invention can verify the effectiveness of the vacuum degree online monitoring system of the vacuum circuit breaker, avoid false alarms and missed guarantees, and ensure the reliability of power supply.