CN212646806U - Current-adjustable loop resistance tester - Google Patents
Current-adjustable loop resistance tester Download PDFInfo
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- CN212646806U CN212646806U CN201922108172.1U CN201922108172U CN212646806U CN 212646806 U CN212646806 U CN 212646806U CN 201922108172 U CN201922108172 U CN 201922108172U CN 212646806 U CN212646806 U CN 212646806U
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- 238000005070 sampling Methods 0.000 claims abstract description 13
- 239000013307 optical fiber Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of loop resistance test, in particular to a loop resistance tester with adjustable current, which comprises a shell, wherein a tester body is arranged in the shell; the utility model discloses an optic fibre and device hardware carry out the communication, the main effect is the parameter setting signal that receives the host computer and send, and the sampling signal of sampling system conveying, generate modulation signal and carry out the protection of device, sampling system mainly passes through hall voltage, current sensor gathers analog signal transfer to control system, hardware system comprises H bridge rectification topological structure, mainly accept and come from the control system signal, generate appointed current volume signal, and carry out hardware protection according to control system protection instruction, communication module passes through the serial ports and links to each other with control system, through wifi and host computer system interconnection, mainly be responsible for the normal communication between control system and the host computer system, the accuracy of test data has been improved.
Description
Technical Field
The utility model belongs to the technical field of the loop resistance test, concretely relates to electric current adjustable loop resistance tester.
Background
The used maximum output current of loop resistance tester at present experimental scene is 200A, and to the loop resistance test of general switch class project, can carry out the precision measurement, nevertheless to large-scale loop resistance test project, like GIS loop resistance state aassessment, because measuring line is longer, voltage loss is great, and its electric current can't satisfy the on-the-spot demand, and it is great to lead to the on-the-spot measuring error, the utility model provides a current adjustable loop resistance tester mainly realizes the continuous regulation of heavy current through power electronic topological structure, realizes the current output more than 200A, can apply to the loop resistance test under the different environment of scene, has improved test data's accuracy.
SUMMERY OF THE UTILITY MODEL
To solve the problems set forth in the background art described above. The utility model provides a current adjustable return circuit resistance tester has the characteristics of measuring the accuracy height, simple structure.
In order to achieve the above object, the utility model provides a following technical scheme: a loop resistance tester with adjustable current comprises a shell, a tester body is arranged in the shell, the tester body is provided with a current display screen and a resistance display screen, a first socket and a second socket are respectively arranged below the current display screen and the resistance display screen, a first control button and a second control button are respectively arranged on the two sides of the first socket and the second socket, the tester body is provided with a power switch, one side of the power switch is provided with a grounding interface, one side of the grounding interface is provided with a power socket, one side of the power socket is provided with a test switch, the tester body is internally provided with a control system and a sampling system, the control system is connected with a communication system through a serial port line, the communication system is interconnected with an upper computer system through Wifi, and the control system is connected with a hardware system through optical fibers.
Preferably, the shell is provided with two handle grooves, and the two handle grooves are respectively positioned on two sides of the shell.
Preferably, one side of the upper surface of the shell is movably connected with a cover plate through a hinge.
Preferably, a DSP chip is arranged in the control system, and the upper computer system is composed of upper computer software.
Preferably, the hardware system main topology adopts an H-bridge IGBT power unit module.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses, control system communicates with communication module through the serial ports, communicate with device hardware through optic fibre, the main effect is to receive the parameter setting signal that the host computer sent, and the sampling signal that sampling system conveys, generate modulation signal and carry out the protection of device, sampling system mainly passes through hall voltage, current sensor acquisition analog quantity signal conveys to control system, hardware system comprises H bridge rectification topological structure, mainly accept comes from control system signal, generate appointed current quantity signal, and protect the hardware according to control system protection instruction, communication module links to each other with control system through the serial ports, through wifi and host computer system interconnection, be responsible for the normal communication between control system and the host computer system, host computer system comprises host computer software, can operate on cell-phone or flat board, the main function is to carry out device parameter setting, and the current signals are sent to a control system to produce corresponding current signals, and the actual output current and the states of all parts of the device are displayed, so that the accuracy of the test data is improved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a front view of the present invention;
FIG. 2 is a circuit diagram of the DC voltage output circuit of the present invention;
FIG. 3 is a schematic diagram of the structure of the module connection of the resistance tester of the present invention;
in the figure: 1. a housing; 2. a handle groove; 3. a hinge; 4. a cover plate; 5. a current display screen; 6. a resistance display screen; 7. a first control button; 8. a test switch; 9. a power outlet; 10. a ground interface; 11. a power switch; 12. a second socket; 13. a second control button; 14. a first socket; 15. a tester body; 16. a control system; 17. a communication system; 18. an upper computer system; 19. a hardware system; 20. a sampling system.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides the following technical solutions: a loop resistance tester with adjustable current comprises a shell 1, wherein a tester body 15 is arranged in the shell 1, a current display screen 5 and a resistance display screen 6 are arranged on the tester body 15, a first socket 14 and a second socket 12 are respectively arranged below the current display screen 5 and the resistance display screen 6, a first control button 7 and a second control button 13 are respectively arranged on two sides of the first socket 14 and the second socket 12, a power switch 11 is arranged on the tester body 15, a grounding interface 10 is arranged on one side of the power switch 11, a power socket 9 is arranged on one side of the grounding interface 10, a test switch 8 is arranged on one side of the power socket 9, a control system 16 and a sampling system 20 are arranged in the tester body 15, and the sampling system 20 mainly collects analog quantity signals through Hall voltage and current sensors and transmits the analog quantity signals to the control system 16, the hardware system 19 is composed of an H-bridge rectification topological structure, and mainly receives signals from the control system 16 to generate specified current magnitude signals, the hardware protection upper computer system 18 is composed of upper computer software according to protection instructions of the control system 16 and can be operated on a mobile phone or a flat panel, the main function is to set device parameters and send the device parameters to the control system 16 to produce corresponding current signals, meanwhile, the display device actually outputs current and states of all parts, the control system 16 is connected with the communication system 17 through serial port lines, the communication system 17 is connected with the upper computer system 18 through Wifi, and the control system 16 is connected with the hardware system 19 through optical fibers.
Specifically, handle grooves 2 are formed in the shell 1, the number of the handle grooves 2 is two, and the two handle grooves 2 are located on two sides of the shell 1 respectively.
Specifically, one side of the upper surface of the shell 1 is movably connected with a cover plate 4 through a hinge 3.
Specifically, a DSP chip is provided in the control system 16, and the upper computer system 18 is composed of upper computer software, and is intended to perform main control of the device, communicate with the communication module through a serial port, communicate with device hardware through an optical fiber, and mainly function to receive a parameter setting signal sent by the upper computer and a sampling signal transmitted by the sampling system 20, generate a modulation signal, and perform protection of the device.
Specifically, the main topology of the hardware system 19 adopts an H-bridge IGBT power unit module, and C1 and C2 are direct-current electrolytic capacitors and play a role in storing direct current; r1 and R2 are voltage-sharing resistors and play a role in voltage sharing at the direct current side; TA1, TA2, TA3, and TA4 are IGBT elements, and mainly convert an alternating voltage into a direct voltage; c3 is buffer absorption capacitor, which plays the circuit protection role; LV is a voltage Hall sensor and is mainly used for collecting direct-current side voltage; the CT is a Hall current sensor and is mainly used for collecting voltage and current at a direct current side.
The utility model discloses a theory of operation and use flow: the utility model discloses, during the use, be connected this power socket 9 and ground connection interface 10 with external power supply and earth respectively through the wire, later will look sideways at the circuit board pass through connecting conductor respectively with first socket 14 and second socket 12 electric connection, connect the back that finishes, according to the measuring different conditions, adjust first control button 7 and second control button 13, the data that the measurement obtained show respectively on current display screen 5 and resistance display screen 6 to the data that obtains the measurement are taken notes.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a current adjustable return circuit resistance tester, includes casing (1), its characterized in that: a tester body (15) is arranged in the shell (1), a current display screen (5) and a resistance display screen (6) are arranged on the tester body (15), a first socket (14) and a second socket (12) are respectively arranged below the current display screen (5) and the resistance display screen (6), a first control button (7) and a second control button (13) are respectively arranged on two sides of the first socket (14) and the second socket (12), a power switch (11) is arranged on the tester body (15), a grounding interface (10) is arranged on one side of the power switch (11), a power socket (9) is arranged on one side of the grounding interface (10), a test switch (8) is arranged on one side of the power socket (9), a control system (16) and a sampling system (20) are arranged in the tester body (15), the control system (16) is connected with a communication system (17) through a serial port line, the communication system (17) is connected with an upper computer system (18) through Wifi, and the control system (16) is connected with a hardware system (19) through an optical fiber.
2. The loop resistance tester with adjustable current of claim 1, wherein: the handle groove (2) is formed in the shell (1), the number of the handle grooves (2) is two, and the two handle grooves (2) are located on two sides of the shell (1) respectively.
3. The loop resistance tester with adjustable current of claim 1, wherein: one side of the upper surface of the shell (1) is movably connected with a cover plate (4) through a hinge (3).
4. The loop resistance tester with adjustable current of claim 1, wherein: a DSP chip is arranged in the control system (16), and the upper computer system (18) is composed of upper computer software.
5. The loop resistance tester with adjustable current of claim 1, wherein: the main topology of the hardware system (19) adopts an H-bridge IGBT power unit module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922108172.1U CN212646806U (en) | 2019-11-29 | 2019-11-29 | Current-adjustable loop resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922108172.1U CN212646806U (en) | 2019-11-29 | 2019-11-29 | Current-adjustable loop resistance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212646806U true CN212646806U (en) | 2021-03-02 |
Family
ID=74767105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922108172.1U Active CN212646806U (en) | 2019-11-29 | 2019-11-29 | Current-adjustable loop resistance tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212646806U (en) |
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2019
- 2019-11-29 CN CN201922108172.1U patent/CN212646806U/en active Active
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