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

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 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 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 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 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.