CN215728567U - Ultrasonic detection device is put in high tension cable office - Google Patents
Ultrasonic detection device is put in high tension cable office Download PDFInfo
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- CN215728567U CN215728567U CN202121450334.0U CN202121450334U CN215728567U CN 215728567 U CN215728567 U CN 215728567U CN 202121450334 U CN202121450334 U CN 202121450334U CN 215728567 U CN215728567 U CN 215728567U
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- voltage cable
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Abstract
A high-voltage cable partial discharge ultrasonic detection device is characterized by comprising a sensor module, a signal processing module and a control module, wherein the sensor module is an ultrasonic sensor arranged outside the high-voltage cable partial discharge ultrasonic detection device; the signal processing module comprises an amplifying circuit, a filter, a level lifting circuit and an A/D conversion circuit which are sequentially connected in series, the level lifting circuit is also connected with a standard voltage source, and the amplifying circuit is connected with the output end of the ultrasonic sensor; the control module comprises a main controller, a communication circuit, a memory and a control interface, wherein the communication circuit, the memory and the control interface are respectively connected with the main controller, and the main controller is also connected with the output end of the A/D conversion circuit.
Description
Technical Field
The utility model relates to a link of high-voltage power transmission in electric power systems and other fields, in particular to a high-voltage cable partial discharge ultrasonic detection device.
Background
Reliability and stability of power systems are the most basic requirements of each power utilization department for the power industry. The high-voltage cable has high transmission voltage, and frequent partial discharge of the cable can cause insulation breakdown and failure, so that serious power failure is caused, and the high-voltage cable partial discharge online detection has great significance. However, the partial discharge online detection technology in the prior art has poor strong electromagnetic interference resistance, high cost and larger volume.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems, the utility model provides a high-voltage cable partial discharge ultrasonic detection device, which adopts the following technical scheme:
an ultrasonic detection device for partial discharge of a high-voltage cable comprises a sensor module, a signal processing module and a control module,
the sensor module is an ultrasonic sensor arranged outside the high-voltage cable partial discharge ultrasonic detection device;
the signal processing module comprises an amplifying circuit, a filter, a level lifting circuit and an A/D conversion circuit which are sequentially connected in series, the level lifting circuit is also connected with a standard voltage source, and the amplifying circuit is connected with the output end of the ultrasonic sensor;
the control module comprises a main controller, a communication circuit, a memory and a control interface, wherein the communication circuit, the memory and the control interface are respectively connected with the main controller, and the main controller is also connected with the output end of the A/D conversion circuit.
Further, the main controller is an STM32 processor, and the filter is a band-pass filter.
Further, the amplifying circuit is coupled with the output end of the ultrasonic sensor through a non-polar capacitor.
Further, the communication circuit transmits the detection data to the remote host by using a LORA technology or a Nb-IOT technology.
Further, the control interface is a keyboard interface or a USB data interface.
Furthermore, the signal processing module, the main controller, the communication circuit and the memory are integrally arranged in a shell, and the shell is provided with a handheld device.
By adopting the high-voltage cable partial discharge ultrasonic detection device, the high-voltage cable partial discharge ultrasonic detection device can realize low cost of strong electromagnetic interference resistance, small size, portability, low cost and high non-contact safety factor, is suitable for online detection of electrical equipment such as high-voltage cables and the like, and has wide application prospect.
Drawings
Fig. 1 is a system schematic diagram of a high voltage cable partial discharge ultrasonic detection device according to the present application.
Fig. 2 is an amplifying circuit schematic diagram of the high-voltage cable partial discharge ultrasonic detection device according to the present application.
Fig. 3 is a schematic diagram of a filter circuit of the high-voltage cable partial discharge ultrasonic detection device according to the present application.
Detailed Description
The high-voltage cable partial discharge ultrasonic detection device shown in fig. 1 comprises a sensor module, a signal processing module and a control module, wherein the sensor module is an ultrasonic sensor arranged outside the high-voltage cable partial discharge ultrasonic detection device; the signal processing module comprises an amplifying circuit, a filter, a level lifting circuit and an A/D conversion circuit which are sequentially connected in series, the level lifting circuit is also connected with a standard voltage source, and the amplifying circuit is connected with the output end of the ultrasonic sensor; control module includes main control unit, communication circuit, memory and control interface, and main control unit is STM32 treater, communication circuit, memory and control interface are connected with main control unit respectively, main control unit still with AD converting circuit's output is connected, control interface is keyboard interface or USB data interface for the input detects the parameter.
The filter of the present application is a band-pass filter, as shown in fig. 3, the front end is a second-order low-pass filter, and the front end and the second-order high-pass filter with the same parameters form a butterworth band-pass filter together, so the design can make the amplitude-frequency characteristic of the filter in the pass band flatter, because the ultrasonic signal generated by the partial discharge has a wider frequency range, a broadband type filter is correspondingly needed, and the bandwidth of the filter is generally set to 30-200kHz for eliminating the high and low frequency interference existing in the field environment.
As shown in fig. 2, the amplification circuit is ac-coupled to the output terminal of the ultrasonic sensor through non-polar capacitors C41 and C44, so as to remove the influence of dc voltage, and at the same time, the C41 and C44 and ground resistors R38 and R39 form a high-pass filter at the input port, so that low-frequency interference in the field environment can be effectively suppressed. A ceramic capacitor C50 and an electrolytic capacitor C52 are connected in parallel between the power supply pin and the ground, so that the introduction of power supply end noise can be avoided. The gain adjusting resistor between the pin 1 and the pin 8 of the chip can be selected by program control, the gain is divided into 8 grades totally, and the gain can be adjusted according to the detection requirement.
The communication circuit of the application adopts LORA technology or Nb-IOT technology to send detection data to the remote host, the remote host can analyze the detection data to judge the aging condition of the high-voltage cable, the communication technology is low in power consumption, transmission distance is not limited, and communication can be carried out by utilizing the existing mobile communication network.
This application signal processing module, main control unit, communication circuit and memory an organic whole set up in the casing, the casing is equipped with hand-held device, like handle etc. portable.
When the device is used, the ultrasonic sensor end of the high-voltage cable partial discharge ultrasonic detection device is aligned to the periphery of the high-voltage cable, and therefore the partial discharge of the high-voltage cable can be detected in real time.
The above description is only an embodiment of the present invention, and the modifications that can be easily conceived by those skilled in the art within the scope of the present invention are all covered within the protection scope of the present invention.
Claims (6)
1. An ultrasonic detection device for partial discharge of a high-voltage cable is characterized by comprising a sensor module, a signal processing module and a control module,
the sensor module is an ultrasonic sensor arranged outside the high-voltage cable partial discharge ultrasonic detection device;
the signal processing module comprises an amplifying circuit, a filter, a level lifting circuit and an A/D conversion circuit which are sequentially connected in series, the level lifting circuit is also connected with a standard voltage source, and the amplifying circuit is connected with the output end of the ultrasonic sensor;
the control module comprises a main controller, a communication circuit, a memory and a control interface, wherein the communication circuit, the memory and the control interface are respectively connected with the main controller, and the main controller is also connected with the output end of the A/D conversion circuit.
2. The ultrasonic testing device for the partial discharge of the high-voltage cable according to claim 1, wherein: the main controller is an STM32 processor, and the filter is a band-pass filter.
3. The ultrasonic testing device for the partial discharge of the high-voltage cable according to claim 1, wherein: the amplifying circuit is coupled with the output end of the ultrasonic sensor through a non-polar capacitor.
4. The ultrasonic testing device for the partial discharge of the high-voltage cable according to claim 1, wherein: the communication circuit transmits the detection data to the remote host by adopting LORA technology or Nb-IOT technology.
5. The ultrasonic testing device for the partial discharge of the high-voltage cable according to claim 1, wherein: the control interface is a keyboard interface or a USB data interface.
6. The ultrasonic testing device for the partial discharge of the high-voltage cable according to any one of claims 1 to 5, wherein: the signal processing module, the main controller, the communication circuit and the memory are integrally arranged in a shell, and the shell is provided with a handheld device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121450334.0U CN215728567U (en) | 2021-06-28 | 2021-06-28 | Ultrasonic detection device is put in high tension cable office |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121450334.0U CN215728567U (en) | 2021-06-28 | 2021-06-28 | Ultrasonic detection device is put in high tension cable office |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215728567U true CN215728567U (en) | 2022-02-01 |
Family
ID=80045639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121450334.0U Expired - Fee Related CN215728567U (en) | 2021-06-28 | 2021-06-28 | Ultrasonic detection device is put in high tension cable office |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215728567U (en) |
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2021
- 2021-06-28 CN CN202121450334.0U patent/CN215728567U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |