Electrical fault detection device and electrical fault detection system based on single-chip microcomputer

Abstract

The utility model relates to the field of electrical fault detection, and specifically discloses an electrical fault detection device and an electrical fault detection system based on a single-chip microcomputer. Comprising a shell, a single chip microcomputer chip, an analog quantity signal input device, an analog quantity signal output device, a switching value signal input device, a switching value signal output device, an AD signal conversion circuit, a DA signal conversion circuit and a display device. The analog quantity signal input device is electrically connected with the AD signal conversion circuit; the single-chip microcomputer chip is electrically connected with the AD signal conversion circuit, the DA signal conversion circuit, the switching value signal input device and the switching value signal output device. The DA signal conversion circuit is electrically connected with the analog quantity signal output device; the analog quantity signal and the switching value signal are transmitted to the display device through the single-chip microcomputer chip, and when an electrical fault occurs, a worker can obtain the change condition of the analog quantity signal and the switching value signal in a fault state at the first time through the display device and search and lock a fault point, so that the efficiency and the accuracy of electrical fault troubleshooting are improved.

Description

Technical Field

[0001] The utility model relates to the field of electrical fault detection, in particular to an electrical fault detection device based on a single chip microcomputer, and also to an electrical fault detection system. Background Art

[0002] An electrical control cabinet is a device that assembles switchgear, measuring instruments, protective electrical appliances and auxiliary equipment in a closed or semi-closed metal cabinet or on a screen according to electrical wiring requirements. Its layout should meet the requirements for normal operation of the power system, facilitate maintenance, and not endanger the safety of people and surrounding equipment.

[0003] When an electrical control cabinet fails, commonly used electrical fault detection instruments include multimeters, megohmmeters, shaking meters, clamp ammeters, etc. These instruments can detect relatively obvious faults, but in the actual electrical fault detection process, the electrical control cabinet sometimes encounters some difficult-to-find faults, such as electrical tripping caused by frequent contactor jumping. These faults are not obvious or are intermittent, and there are usually no staff on site when the fault occurs, resulting in low troubleshooting efficiency for the staff. It is not convenient to obtain the changes in analog signals and switch signals in the fault state in the first time, and to find and lock the fault point, thereby affecting normal production. Therefore, people in this field are in urgent need of finding a new technical solution to solve the above problems. Utility Model Content

[0004] In view of the technical problems in the prior art, the utility model provides an electrical fault detection device based on a single chip microcomputer.

[0005] The utility model provides an electrical fault detection device based on a single-chip microcomputer, comprising: a housing, a single-chip microcomputer chip, an analog signal input device, an analog signal output device, a switch signal input device, a switch signal output device, an AD signal conversion circuit, a DA signal conversion circuit, and a display device, wherein:

[0006] The single-chip microcomputer chip is connected to the display device;

[0007] The output end of the analog signal input device is electrically connected to the input end of the AD signal conversion circuit; the output end of the AD signal conversion circuit is electrically connected to the single-chip microcomputer chip, and the single-chip microcomputer chip is electrically connected to the input end of the DA signal conversion circuit; the output end of the DA signal conversion circuit is electrically connected to the input end of the analog signal output device; the output end of the switch signal input device is electrically connected to the single-chip microcomputer chip, and the single-chip microcomputer chip is electrically connected to the input end of the switch signal output device.

[0008] Furthermore, the display device includes a camera, a video recording display screen, and a waveform recording display screen; the camera is electrically connected to the video recording display screen and the single-chip microcomputer chip; the video recording display screen is electrically connected to the single-chip microcomputer chip; the waveform recording display screen is electrically connected to the single-chip microcomputer chip; the camera is arranged on the outside of the shell, and the video recording display screen and the waveform recording display screen are arranged on the shell.

[0009] Furthermore, the switch signal input device inputs a switch signal, and the switch signal includes two states: power-off and power-on.

[0010] Furthermore, when the switch signal is in a power-off state, the single-chip microcomputer chip outputs a high-level signal.

[0011] Furthermore, when the switch signal is in a power-on state, the single-chip microcomputer chip outputs a low-level signal.

[0012] Furthermore, it also includes a power supply, which includes a battery, a first voltage conversion circuit, a second voltage conversion circuit, a first voltage stabilizing circuit, and a second voltage stabilizing circuit, wherein: the battery is electrically connected to the first voltage conversion circuit and the second voltage conversion circuit; the output end of the first voltage conversion circuit is electrically connected to the first voltage stabilizing circuit, and the output end of the first voltage stabilizing circuit is electrically connected to the single-chip microcomputer chip; the output end of the second voltage conversion circuit is electrically connected to the second voltage stabilizing circuit, and the output end of the second voltage stabilizing circuit is electrically connected to the camera, the video recording display screen, and the waveform recording display screen.

[0013] The utility model provides an electrical fault detection system, comprising the above-mentioned electrical fault detection device, and also comprising an analog quantity device and a switch quantity device, wherein the analog quantity device is connected to the input end of the analog quantity signal input device, and the switch quantity device is connected to the input end of the switch quantity signal input device.

[0014] Furthermore, the switching device includes one or more of a push button switch, a contactor, a relay, and a solenoid valve.

[0015] Furthermore, the plurality of switch quantity devices are respectively connected to different signal receiving ends of the switch quantity signal input device.

[0016] Furthermore, the analog quantity device includes one or more of a voltmeter, an ammeter, a temperature sensor, a pressure sensor, and a rotation speed sensor.

[0017] The utility model provides an electrical fault detection device based on a single-chip microcomputer, comprising a housing, a single-chip microcomputer chip, an analog signal input device, an analog signal output device, a switch signal input device, a switch signal output device, an AD signal conversion circuit, a DA signal conversion circuit, and a display device, wherein: the output end of the analog signal input device is electrically connected to the input end of the AD signal conversion circuit, the analog signal input device receives the analog signal and transmits it to the AD signal conversion circuit, the AD signal conversion circuit converts the analog signal into a digital signal and outputs it; the output end of the AD signal conversion circuit is electrically connected to the single-chip microcomputer chip, the single-chip microcomputer chip is electrically connected to the input end of the DA signal conversion circuit, the AD signal conversion circuit transmits the digital signal to the single-chip microcomputer chip for processing, and then transmits the digital signal to the DA signal conversion circuit; the DA signal conversion circuit The output end of the circuit is electrically connected to the input end of the analog signal output device, the DA signal conversion circuit converts the digital signal into an analog signal, and then transmits the analog signal to the analog signal output device; the output end of the switch signal input device is electrically connected to the single-chip microcomputer chip, the single-chip microcomputer chip is electrically connected to the input end of the switch signal output device, the switch signal input device receives the switch signal and transmits it to the single-chip microcomputer chip for processing, and then transmits the switch signal to the switch signal output device after processing; the single-chip microcomputer chip is connected to the display device, the analog signal and the switch signal are transmitted to the display device through the single-chip microcomputer chip for display, when an electrical fault occurs, the staff can obtain the changes of the analog signal and the switch signal in the fault state through the display device in the first time, and find and lock the fault point, thereby improving the efficiency and accuracy of electrical fault detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a structural diagram of an electrical fault detection device based on a single chip microcomputer of the utility model;

[0020] Figure 2 This is a structural diagram of a power supply of an electrical fault detection device based on a single chip microcomputer of the utility model;

[0021] Among them: 10-single chip microcomputer chip, 20-analog signal input device, 30-analog signal output device, 40-switch signal input device, 50-switch signal output device, 60-AD signal conversion circuit, 70-DA signal conversion circuit, 80-camera, 90-video recording display screen, 100-waveform recording display screen, 110-battery, 111-first voltage conversion circuit, 112 second voltage conversion circuit, 113 first voltage stabilizing circuit, 114-second voltage stabilizing circuit. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model.

[0023] In an electrical fault detection device based on a single chip microcomputer in an embodiment of the utility model, Figure 1As shown, it includes a housing, a single-chip microcomputer chip 10, an analog signal input device 20, an analog signal output device 30, a switch signal input device 40, a switch signal output device 50, an AD signal conversion circuit 60, a DA signal conversion circuit 70, and a display device, wherein: the output end of the analog signal input device 20 is electrically connected to the input end of the AD signal conversion circuit 60, the analog signal input device 20 receives the analog signal and transmits it to the AD signal conversion circuit 60, the AD signal conversion circuit 60 converts the analog signal into a digital signal and outputs it; the output end of the AD signal conversion circuit 60 is electrically connected to the single-chip microcomputer chip 10, the single-chip microcomputer chip 10 is electrically connected to the input end of the DA signal conversion circuit 70, the AD signal conversion circuit 60 transmits the digital signal to the single-chip microcomputer chip 10 for processing, and then transmits the digital signal to the DA signal conversion circuit 70; the DA signal conversion circuit 70 The output end is electrically connected to the input end of the analog signal output device 30, and the DA signal conversion circuit 70 converts the digital signal into an analog signal, and then transmits the analog signal to the analog signal output device 30; the output end of the switch signal input device 40 is electrically connected to the single-chip microcomputer chip 10, and the single-chip microcomputer chip 10 is electrically connected to the input end of the switch signal output device 50. After receiving the switch signal, the switch signal input device 40 transmits it to the single-chip microcomputer chip 10 for processing, and then transmits the switch signal to the switch signal output device 50 after processing; the single-chip microcomputer chip 10 is connected to the display device, and the analog signal and the switch signal are transmitted to the display device through the single-chip microcomputer chip 10 for display. When an electrical fault occurs, the staff can obtain the changes of the analog signal and the switch signal in the fault state through the display device in the first time, and find and lock the fault point, thereby improving the efficiency and accuracy of electrical fault detection.

[0024] Specifically, Figure 1 As shown, the display device includes a camera 80, a video recording display screen 90, and a waveform recording display screen 100; the camera 80 is electrically connected to the video recording display screen 90 and the single-chip microcomputer chip 10; the video recording display screen 90 is electrically connected to the single-chip microcomputer chip 10; the waveform recording display screen 100 is electrically connected to the single-chip microcomputer chip 10; the camera 80 is arranged on the outside of the shell, and the video recording display screen 90 and the waveform recording display screen 100 are arranged on the shell.

[0025] In the embodiment of the utility model, the camera 80 is used to record the status of the analog device and the switch device and transmit the image data to the camera recording display screen 90, and store it in the single-chip microcomputer chip 10 in the form of an image. The camera recording display screen 90 is used to display the status of the analog device and the switch device. When a fault occurs, the staff can determine the time when the fault occurs through the camera recording display screen 90, and determine the device where the fault occurs through the status of the analog device and the switch device; the waveform recording display screen 100 is used to record the waveform changes of the analog signal and the switch signal. For example, the waveform of the analog signal is generally a continuous irregular figure, and the waveform of the switch signal is generally a concave or convex shape. When a fault occurs, the staff can view the waveform changes of the analog signal and the switch signal through the waveform recording display screen 100 to further determine the device where the fault occurs, and can analyze the cause of the fault through the waveform changes, thereby improving the efficiency and accuracy of electrical fault detection.

[0026] Specifically, the switch signal input device 40 inputs a switch signal, and the switch signal includes two states: power-off and power-on. When the switch signal is in the power-off state, the microcontroller chip 10 outputs a high-level signal; when the switch signal is in the power-on state, the microcontroller chip 10 outputs a low-level signal.

[0027] In the embodiment of the utility model, the output end of the switch signal input device 40 is connected to the single-chip microcomputer chip 10. When the single-chip microcomputer chip 10 detects that the switch signal is in the power-off state, the single-chip microcomputer chip 10 outputs a high-level signal; when the single-chip microcomputer chip 10 detects that the switch signal is in the power-on state, the single-chip microcomputer chip 10 outputs a low-level signal; at the same time, the high-level signal and the low-level signal will be transmitted by the single-chip microcomputer chip 10 to the waveform recording display screen 100 and expressed by waveform changes.

[0028] Specifically, Figure 2As shown, it also includes a power supply, which includes a battery 110, a first voltage conversion circuit 111, a second voltage conversion circuit 112, a first voltage stabilizing circuit 113, and a second voltage stabilizing circuit 114, wherein: the battery 110 is electrically connected to the first voltage conversion circuit 111 and the second voltage conversion circuit 112, and the battery 110 is used to supply power to the first voltage conversion circuit 111 and the second voltage conversion circuit 112; the output end of the first voltage conversion circuit 111 is electrically connected to the first voltage stabilizing circuit 113, and the output end of the first voltage stabilizing circuit 113 is electrically connected to the single-chip microcomputer chip 10, The first voltage conversion circuit 111 is used to supply power to the first voltage stabilizing circuit 113, and the first voltage stabilizing circuit 113 is used to supply power to the single-chip microcomputer chip 10; the output end of the second voltage conversion circuit 112 is electrically connected to the second voltage stabilizing circuit 114, and the output end of the second voltage stabilizing circuit 114 is electrically connected to the camera 80, the video recording display screen 90, and the waveform recording display screen 100, the second voltage conversion circuit 112 is used to supply power to the second voltage stabilizing circuit 114, and the second voltage stabilizing circuit 114 is used to supply power to the camera 80, the video recording display screen 90, and the waveform recording display screen 100.

[0029] In the embodiment of the utility model, the battery 110 is used to power the device, and no external power supply is required. It can provide power when no external power supply is available, which is convenient for staff to carry with them. When electrical faults are detected, it will also be more convenient for staff to operate, thereby improving the efficiency of fault detection.

[0030] An embodiment of the utility model also includes an electrical fault detection system, which also includes an analog quantity device and a switch quantity device. The analog quantity device is connected to the input end of the analog quantity signal input device 20, and the switch quantity device is connected to the input end of the switch quantity signal input device 40; the analog quantity device outputs an analog quantity signal and transmits it to the analog quantity signal input device 20, and the switch quantity device outputs a switch quantity signal and transmits it to the switch quantity signal input device 40.

[0031] Specifically, the switch quantity device includes one or more of a push button switch, a contactor, a relay, and a solenoid valve.

[0032] Specifically, multiple switch quantity devices are respectively connected to different signal receiving ends of the switch quantity signal input device 40, and the switch quantity signal input device 40 can simultaneously receive switch quantity signals output by multiple switch quantity devices, so as to simultaneously record the status of multiple switch quantity devices.

[0033] Specifically, the analog quantity device includes one or more of a voltmeter, an ammeter, a temperature sensor, a pressure sensor, and a rotation speed sensor.

[0034] The utility model is further described above with the help of specific embodiments, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the utility model. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the utility model.

Claims

1. An electrical fault detection device based on a single chip microcomputer, characterized in that: include: Housing, single-chip microcomputer chip, analog signal input device, analog signal output device, switch signal input device, switch signal output device, AD signal conversion circuit, DA signal conversion circuit, display device, wherein: The single-chip microcomputer chip is connected to the display device; The output end of the analog signal input device is electrically connected to the input end of the AD signal conversion circuit; the output end of the AD signal conversion circuit is electrically connected to the single-chip microcomputer chip, and the single-chip microcomputer chip is electrically connected to the input end of the DA signal conversion circuit; the output end of the DA signal conversion circuit is electrically connected to the input end of the analog signal output device; the output end of the switch signal input device is electrically connected to the single-chip microcomputer chip, and the single-chip microcomputer chip is electrically connected to the input end of the switch signal output device.

2. The electrical fault detection device based on a single chip microcomputer as claimed in claim 1, characterized in that: The display device includes a camera, a video recording display screen, and a waveform recording display screen; the camera is electrically connected to the video recording display screen and the single-chip microcomputer chip; the video recording display screen is electrically connected to the single-chip microcomputer chip; the waveform recording display screen is electrically connected to the single-chip microcomputer chip; the camera is arranged on the outside of the shell, and the video recording display screen and the waveform recording display screen are arranged on the shell.

3. The electrical fault detection device based on a single chip microcomputer as claimed in claim 1, characterized in that: The switch signal input device inputs a switch signal, and the switch signal includes two states: power-off and power-on.

4. The electrical fault detection device based on a single chip microcomputer as claimed in claim 3, characterized in that: When the switch signal is in a power-off state, the single-chip microcomputer chip outputs a high-level signal.

5. The electrical fault detection device based on a single chip microcomputer as claimed in claim 3, characterized in that: When the switch signal is in a power-on state, the single-chip microcomputer chip outputs a low-level signal.

6. The electrical fault detection device based on a single chip microcomputer as claimed in claim 2, characterized in that: It also includes a power supply, which includes a battery, a first voltage conversion circuit, a second voltage conversion circuit, a first voltage stabilizing circuit, and a second voltage stabilizing circuit, wherein: the battery is electrically connected to the first voltage conversion circuit and the second voltage conversion circuit; the output end of the first voltage conversion circuit is electrically connected to the first voltage stabilizing circuit, and the output end of the first voltage stabilizing circuit is electrically connected to the single-chip microcomputer chip; the output end of the second voltage conversion circuit is electrically connected to the second voltage stabilizing circuit, and the output end of the second voltage stabilizing circuit is electrically connected to the camera, the video recording display screen, and the waveform recording display screen.

7. An electrical fault detection system, characterized in that: The electrical fault detection device detection device comprises the detection equipment of any one of claims 1 to 6, and also comprises an analog quantity device and a switch quantity device, wherein the analog quantity device is connected to the input end of the analog quantity signal input device, and the switch quantity device is connected to the input end of the switch quantity signal input device.

8. An electrical fault detection system as claimed in claim 7, characterized in that: The switching quantity device includes one or more of a push button switch, a contactor, a relay, and a solenoid valve.

9. An electrical fault detection system as claimed in claim 7, characterized in that: The plurality of switch quantity devices are respectively connected to different signal receiving ends of the switch quantity signal input device.

10. An electrical fault detection system as claimed in claim 7, characterized in that: The analog quantity device includes one or more of a voltmeter, an ammeter, a temperature sensor, a pressure sensor, and a rotation speed sensor.

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