CN220064233U - Wireless distributed loop resistance tester - Google Patents
Wireless distributed loop resistance tester Download PDFInfo
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- CN220064233U CN220064233U CN202321527949.8U CN202321527949U CN220064233U CN 220064233 U CN220064233 U CN 220064233U CN 202321527949 U CN202321527949 U CN 202321527949U CN 220064233 U CN220064233 U CN 220064233U
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- 239000002699 waste material Substances 0.000 abstract description 3
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Abstract
The utility model belongs to the technical field of resistance testing, and provides a wireless distributed loop resistance tester which comprises a current output unit and a plurality of voltage measurement units, wherein during testing, two current output ends of the current output unit are respectively connected with the outermost ends of series resistors to be tested, each voltage measurement unit is respectively connected with different resistors to be tested in the series resistors to be tested, a measurement result of each resistor in the series resistors can be obtained by means of wireless connection between the current output unit and each voltage measurement unit, aiming at an object to be tested which is connected in series with a plurality of resistors, only the voltage measurement line can be moved, wiring work is reduced, the problem that one disconnection is needed for each resistor to be measured is avoided, the plurality of voltage measurement units can be used for simultaneously measuring the plurality of resistors, and the problem that the traditional loop resistance tester wastes time and labor when testing the series structure of the plurality of resistors is greatly shortened is solved.
Description
Technical Field
The utility model belongs to the technical field of resistance testing, and particularly relates to a wireless distributed loop resistance tester.
Background
The resistance test of the conductive loop of various switch devices, the test current of which is not less than 100A. The contact resistance increases due to oxidation of the contact surface, poor contact fastening and the like, and when a large current flows, the temperature of the contact point increases, so that the contact resistance further increases due to oxidation of the contact surface, serious accidents continue to occur, and therefore, the contact resistance needs to be measured frequently or regularly.
The inventor finds that when a traditional loop resistance tester is used for loop test, a current output line and a voltage measurement line are required to be clamped at two ends of a resistor to be tested for test; when the object to be measured is in a multi-resistor serial structure, each resistor is measured, one disconnecting is needed, and time and labor are wasted; the structure of multi-resistor series connection is quite common in the use field, such as GIS gas insulated switchgear, so in the actual resistor test, the frequent disconnection problem of the series resistor is common.
Disclosure of Invention
In order to solve the problems, the utility model provides a wireless distributed loop resistance tester, which can realize rapid measurement of series resistance.
According to some embodiments, the utility model provides a wireless distributed loop resistance tester, which adopts the following technical scheme:
a wireless distributed loop resistance tester comprises a current output unit and a plurality of voltage measurement units;
two current output ends of the current output unit are respectively connected with the outermost ends of the series resistors to be tested; each voltage measuring unit is respectively connected with different resistors to be measured in the series resistors to be measured, and specifically, two voltage input ends of each voltage measuring unit are respectively connected with two ends of each resistor to be measured; the current output unit is connected with each voltage measurement unit in a wireless mode.
Further, the current output unit comprises a current processor, and the current processor is connected with a constant current source and a current divider.
Further, the current output unit is also connected with a wireless radio frequency module.
Further, an A/D conversion module is connected between the current processor and the current divider.
Further, the current processor is set as an STM32F103RCT6 chip.
Further, the voltage measuring unit comprises a voltage processor, and the voltage processor is connected with a voltage sampling module.
Further, the voltage processor is connected with the voltage sampling module through an A/D conversion module.
Further, the voltage processor is also connected with a wireless radio frequency module.
Further, the voltage processor is also connected with an address setting module.
Further, the voltage processor is set as an STM32F103RCT6 chip.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model comprises a current output unit and a plurality of voltage measurement units, wherein during testing, two current output ends of the current output unit are respectively connected with the outermost ends of the series resistors to be tested, each voltage measurement unit is respectively connected with different resistors to be tested in the series resistors to be tested, the measurement result of each resistor in the series resistors can be obtained by means of wireless connection between the current output unit and each voltage measurement unit, aiming at the object to be tested of multi-resistor series connection, the current output line can be removed, only the voltage measurement line can be removed, the wiring work is reduced, the problem that one-time disconnection is needed for each resistor to be measured is avoided, the plurality of voltage measurement units can be used for simultaneously measuring the plurality of resistors, the measurement time is greatly shortened, and the problem that the traditional loop resistance tester wastes time and labor when testing the multi-resistor series structure is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
FIG. 1 is a schematic structural view of embodiment 1 of the present utility model;
FIG. 2 is a schematic diagram showing the connection of the modules in embodiment 1 of the present utility model;
fig. 3 is a circuit diagram of a current output unit of embodiment 1 of the present utility model;
fig. 4 is a circuit diagram of a voltage measurement unit of embodiment 1 of the present utility model;
fig. 5 is a schematic diagram of a current output unit according to embodiment 2 of the present utility model;
FIG. 6 is a schematic side view of a current measuring unit according to embodiment 2 of the present utility model; a step of
FIG. 7 is a schematic diagram of a voltage measurement unit according to embodiment 2 of the present utility model;
wherein: 11. a current output housing; 12. two current terminals; 13. a current main board; 21. a voltage measurement housing; 22. two voltage terminals; 23. and a voltage main board.
The specific embodiment is as follows:
the utility model will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
Example 1:
when the traditional loop resistance tester tests a multi-resistance serial structure, each time one resistor is measured, the disconnection is needed, the problem of time and labor waste exists, and aiming at an object to be tested of multi-resistance serial connection, the design of the loop resistance tester which is quick and convenient to use is necessary; as shown in fig. 1, the present embodiment provides a wireless distributed loop resistance tester, which includes a current output unit and a plurality of voltage measurement units;
two current output ends of the current output unit are respectively connected with the outermost ends of the series resistors to be tested; each voltage measuring unit is respectively connected with different resistors to be measured in the series resistors to be measured, and specifically, two voltage input ends of each voltage measuring unit are respectively connected with two ends of each resistor to be measured; the current output unit is connected with each voltage measurement unit in a wireless mode.
During testing, two current output ends of the current output unit are respectively connected to the outermost ends of the series resistors to be tested, each voltage measurement unit is respectively connected to different resistors to be tested in the series resistors to be tested, the measurement result of each resistor in the series resistors can be obtained by means of wireless connection between the current output unit and each voltage measurement unit, the problem that one disconnection is needed for each resistor to be measured is avoided, and the problem that time and labor are wasted when a traditional loop resistance tester tests a multi-resistor series structure is solved.
The current processor is connected with the constant current source, and can control the constant current source to output direct current and constant current, and the output current is not less than 100A. The shunt is connected in series with one output line of the constant current source and can detect the output current. The current divider is connected with the A/D conversion module, and the A/D conversion module converts the current value into digital quantity. The A/D conversion module is connected with the current processor and transmits the A/D conversion result of the current value to the current processor. The wireless radio frequency module is connected with the current processor and can perform wireless communication. The current processor optionally uses STM32F103RCT6 chip, and the A/D conversion module uses AD7686 chip.
As shown in fig. 2, the current output unit includes a current processor to which a constant current source and a shunt are connected. The current output unit is also connected with a wireless radio frequency module, and a 433 wireless radio frequency module can be adopted. An A/D conversion module is connected between the current processor and the current divider, and the A/D conversion module can convert the current value into digital quantity. The current processor is set as an STM32F103RCT6 chip.
Specifically, as shown in fig. 3, a signal amplifying module is arranged between the current processor and the current divider, and the current processor and the signal amplifying module can be connected through pins such as pgai_cs, pgai_dio, pgai_sclk, and the like; the current processor and the A/D conversion module can be connected through pins such as ADI_SCLK, ADI_SDO and ADI_CNV; the current processor and the wireless radio frequency module can be connected through pins such as TXDI, RXDI and 433 SETI.
As shown in fig. 2, the voltage measurement unit includes a voltage processor, and the voltage processor is connected with a voltage sampling module. The voltage processor is connected with the voltage sampling module through an A/D conversion module, and the A/D conversion module can convert the voltage value into digital quantity. The voltage processor is also connected with a wireless radio frequency module, and a 433 wireless radio frequency module can be adopted. The voltage processor is also connected with an address setting module. The voltage processor is set as an STM32F103RCT6 chip.
The voltage sampling module is connected with the A/D conversion module, and the A/D conversion module converts the voltage value into digital quantity. The A/D conversion module is connected with the voltage processor and transmits the A/D conversion result of the voltage value to the voltage processor. 433 wireless radio frequency module is connected with the voltage processor, can carry out wireless communication. The address setting module is a group of dial switches, and can set the communication address of the voltage measuring units for distinguishing different voltage measuring units. Alternatively, the voltage processor may use an STM32F103RCT6 chip and the A/D conversion module an AD7686 chip.
Specifically, as shown in fig. 4, a signal amplifying module is disposed between the voltage processor and the voltage sampling module, and the voltage processor and the signal amplifying module may be connected through pins such as pgav_cs, pgav_dio, pgav_sclk, etc.; the voltage processor and the A/D conversion module can be connected through pins such as ADV_SCLK, ADV_SDO, ADV_CNV and the like; the voltage processor and the wireless radio frequency module can be connected through pins such as TXDV, RXDV and 433 SETV; the voltage processor and the address setting module can be connected through pins such as ADDR1, ADDR2, ADDR3 and ADDR 4.
One of the working principles or processes of this embodiment is:
the current output unit communicates with a plurality of voltage measurement units through the wireless radio frequency. The current output unit can be used as a communication host, and optionally, a polling response mode is adopted to communicate with the voltage measurement units with different addresses one by one. The current output unit can acquire voltage measurement data of the voltage measurement unit, then calculate voltage and current data through the prior art, and obtain the resistance value of the test point where the voltage measurement unit is located.
Taking the test using 3 sets of voltage measurement units as an example, the address setting modules in the voltage measurement units are optionally set to addresses 0x01, 0x02 and 0x03, respectively, and the 3 addresses are address identification codes of 433 radio frequency communication.
When in wiring, the current output units need to connect two current output ends at the outermost ends of the whole series resistor respectively, and the 3 groups of voltage measurement units select resistance points to be measured respectively and obtain voltage signals of the resistors to be measured.
The current output unit starts current output, and the current processor controls the constant current source to output constant direct current. The current value is sampled by the current divider and is converted into digital quantity by the A/D conversion module to be transmitted to the current processor. In this way, the current output unit obtains the actual current output value of the entire loop.
The voltage measuring unit starts real-time measurement, and the voltages at two ends of the resistor to be measured enter the A/D conversion module through the voltage sampling module, and the A/D conversion module converts the voltages into digital values and transmits the digital values to the voltage processor. Thus, the voltage measurement unit obtains the voltage value across the resistor to be measured.
The current output unit reads data from the voltage measuring unit with the address number of 0x01 through the 433 wireless radio frequency module, and the voltage measuring unit with the address number of 0x01 returns the current measured voltage value data to the current output unit. After the current output unit obtains the voltage measured value, the current output unit calculates the current value measured by the current output unit, and the resistance value of the voltage measuring unit with the address number of 0x01 is obtained. According to the above process, the resistance values of the voltage measurement units with the address numbers of 0x02 and 0x03 are sequentially obtained.
After obtaining the measurement data of 3 groups of resistance values, 3 groups of voltage measurement units can be moved, the wiring of the current output unit is kept unchanged, and then the simultaneous measurement of the next 3 groups of resistance is carried out. This achieves a fast operation of only the moving voltage measurement line without reconnecting the current output line.
Example 2:
the embodiment provides a wireless distributed loop resistance tester, which comprises a current output unit and a voltage measurement unit;
as shown in fig. 5 and 6, the current output unit includes a current output housing 11, two current terminals 12, and a current main board 13. The current main board 13 is electrically connected with two current terminals 12, and can output current to the outside, and the current main board 13 and the two current terminals 12 are arranged on the current output shell 11; the structural form of the current terminals 12, and the installation manner of the current main board 13 and the two current terminals 12 can be realized by conventional technologies, and are not described in detail herein; it can be understood that the circuit diagram on the current main board 13 in this embodiment is shown in fig. 3 in embodiment 1.
As shown in fig. 7, the voltage measuring unit includes a voltage measuring housing 21, two voltage terminals 22, and a voltage main board 23. The voltage main board 23 is electrically connected to two voltage terminals 22, and can measure external voltage signals. The voltage main board 23 and the two voltage terminals 22 are mounted on the voltage measurement housing 21, and the structural form of the voltage terminals 22, and the mounting manner of the voltage main board 23 and the two voltage terminals 22 may be implemented by conventional techniques, which will not be described in detail herein; it can be understood that the circuit diagram on the voltage main board 23 in this embodiment is shown in fig. 4 in embodiment 1.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The wireless distributed loop resistance tester is characterized by comprising a current output unit and a plurality of voltage measurement units;
two current output ends of the current output unit are respectively connected with the outermost ends of the series resistors to be tested; each voltage measuring unit is respectively connected with different resistors to be measured in the series resistors to be measured, and specifically, two voltage input ends of each voltage measuring unit are respectively connected with two ends of each resistor to be measured; the current output unit is connected with each voltage measurement unit in a wireless mode.
2. The wireless distributed loop resistance tester of claim 1, wherein said current output unit comprises a current processor, said current processor being connected to a constant current source and a shunt.
3. The wireless distributed loop resistance tester according to claim 2, wherein the current output unit is further connected with a wireless radio frequency module.
4. The wireless distributed loop resistance tester according to claim 2, wherein an a/D conversion module is connected between the current processor and the shunt.
5. A wireless distributed loop resistance tester as claimed in claim 2, wherein the current processor is provided as an STM32F103RCT6 chip.
6. The wireless distributed loop resistance tester of claim 1, wherein the voltage measurement unit comprises a voltage processor, and wherein the voltage processor is connected to a voltage sampling module.
7. The wireless distributed loop resistance tester of claim 6, wherein said voltage processor is coupled to said voltage sampling module via an a/D conversion module.
8. The wireless distributed loop resistance tester of claim 6, wherein the voltage processor is further coupled to a wireless radio frequency module.
9. The wireless distributed loop resistance tester of claim 6, wherein said voltage processor is further coupled to an address setting module.
10. A wireless distributed loop resistance tester as recited in claim 6, wherein said voltage processor is configured as an STM32F103RCT6 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321527949.8U CN220064233U (en) | 2023-06-14 | 2023-06-14 | Wireless distributed loop resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321527949.8U CN220064233U (en) | 2023-06-14 | 2023-06-14 | Wireless distributed loop resistance tester |
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| Publication Number | Publication Date |
|---|---|
| CN220064233U true CN220064233U (en) | 2023-11-21 |
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| CN202321527949.8U Active CN220064233U (en) | 2023-06-14 | 2023-06-14 | Wireless distributed loop resistance tester |
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- 2023-06-14 CN CN202321527949.8U patent/CN220064233U/en active Active
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