CN204989442U - Contact resistance tester calibrating device - Google Patents
Contact resistance tester calibrating device Download PDFInfo
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- CN204989442U CN204989442U CN201520485286.7U CN201520485286U CN204989442U CN 204989442 U CN204989442 U CN 204989442U CN 201520485286 U CN201520485286 U CN 201520485286U CN 204989442 U CN204989442 U CN 204989442U
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- contact resistance
- resistance tester
- tester
- resistance
- constant current
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Abstract
The utility model relates to a contact resistance tester calibrating device, including the contact resistance tester, constant current source output end positive electrode and the negative pole of contact resistance tester are connected, the perhaps constant current source output connection ampere meter of contact resistance tester, a voltage source is connected to the voltage input end of contact resistance tester. The utility model discloses a set up the standard voltage source, it compares with tester demonstration value to calculate the standard resistance value according to ohm law, the restriction that constant ohmic resistance received the fixed value has been overcome, can't calibrate the all resistance demonstration values in the contact resistance tester full -scale range, with adopt the slide resistance method to receive the contact resistance's of material temperature coefficient's restriction and slipper influence, the unable problem of guaranteeing the calibration accuracy of detector, and then the effect that has reached continuously adjustable pointwise calibration and improved the calibration accuracy.
Description
Technical field
The utility model relates to a kind of calibrating installation, particularly a kind of contact resistance tester calibration device.
Background technology
Bullet train wheel is measure the visual plant of bullet train wheel to contact resistance to contact resistance tester, takes turns and whether meets process specifications to contacting with wheel shaft, realized by measuring wheel to contact resistance.For ensureing its accuracy of measurement, implementing calibration to it is necessary means.
The calibration of bullet train wheel to contact resistance tester, belongs to low-resistance calibration, especially easily introduces error, usually adopts fixed value resistance and slide wire resistance method to carry out.Fixed value resistance, by the restriction of fixed value, cannot be calibrated all indicating values in tester gamut; Although continuous calibration can be realized by slide wire resistance method, due to the impact by the restriction of material temperature coefficient and the contact resistance of slipper, the calibration accuracy of tester cannot be ensured.These methods are all undertaken by the measuring method of school instrument by simulation.
Utility model content
The utility model fundamental purpose is to solve the problem and deficiency, and providing a kind of can calibrate all indicating values in tester gamut, and the contact resistance tester calibration device that calibration accuracy is high.
For achieving the above object, the technical solution of the utility model is:
A kind of contact resistance tester calibration device, comprise contact resistance tester, it is characterized in that: the constant current source output head anode of described contact resistance tester is connected with negative pole, the voltage input end of described contact resistance tester connects a voltage source.
Further, described voltage source is standard voltage source.
Another technical scheme of the present utility model is:
A kind of contact resistance tester calibration device, comprise contact resistance tester, it is characterized in that: the constant current source output terminal of described contact resistance tester connects a reometer, the voltage input end of described contact resistance tester connects a voltage source.
Further, in constant current source output terminal and a protective resistance of connecting between described reometer of described contact resistance tester.
Further, described protective resistance is adjustable resistance.
Further, described voltage source is standard voltage source.
To sum up content, a kind of contact resistance tester calibration device described in the utility model, by arranging standard voltage source, standard electric resistance is calculated compared with tester displayed value according to Ohm law, overcome the restriction of fixed value resistance by fixed value, cannot calibrate by the resistance displayed value all to contact resistance tester, with the impact adopting slide wire resistance method to be subject to the restriction of material temperature coefficient and the contact resistance of slipper, the problem of the calibration accuracy of detector cannot be ensured, and then reach the effect regulating pointwise calibration continuously and improve calibration accuracy.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment one;
Fig. 2 is the structural representation of the utility model embodiment two.
As depicted in figs. 1 and 2, tested contact resistance tester 1, standard voltage source 2, reometer 3, constant current source 4, voltage table 5.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
Embodiment one:
As shown in Figure 1, a kind of contact resistance tester calibration device, comprises tested contact resistance tester 1, and tested contact resistance tester 1 inside is provided with constant current source 4 and voltage table 5.
Constant current source 4 output head anode of tested contact resistance tester 1 is connected with negative pole, and the voltage input end of tested contact resistance tester 1 connects a standard voltage source 2, and standard voltage source 2 is connected with the voltage table 5 in tested contact resistance tester 1.
By the setting value of the magnitude of voltage of standard voltage source 2 and constant current source 4, be divided by according to Ohm law and obtain standard electric resistance; The setting value of the voltage that tested contact resistance tester 1 builtin voltage table 5 detects and constant current source 4, be divided by according to Ohm law and obtain the resistance displayed value of tested contact resistance tester 1, by standard electric resistance compared with resistance displayed value, thus can judge whether the resistance displayed value of tested contact resistance tester 1 exists error.
Tested contact resistance tester 1 can be the tester of digital line pointer-type, also can be that there is the electronic type tester that resistance refers to display screen, change the magnitude of voltage of standard voltage source 2, obtain resistance displayed values all in tested contact resistance tester 1 gamut, and calculate its corresponding standard electric resistance, thus can determine in tested contact resistance tester 1 gamut, whether all resistance displayed values exist error.
Compared with the mode adopting fixed value resistance to calibrate in prior art, this calibrating installation and method save the cost of multiple fixed value resistance, simplify calibration procedure, and can reach the covering completely to tested contact resistance tester 1 gamut calibration.
Compared with the mode adopting slide wire resistance to calibrate in prior art, this calibrating installation and method are not subject to the impact of the restriction of slide wire resistance material temperature coefficient and the contact resistance of slipper, effectively can ensure the calibration accuracy of tested contact resistance tester 1.
The calculating of process to standard uncertainty, verifies this calibrating installation and method meets transmission of quantity value principle, meets alignment requirements.
In sum, this calibrating installation and method solve technical matters of the prior art, reach the effect regulating pointwise calibration continuously and improve calibration accuracy.
Embodiment two:
The present embodiment, compared with embodiment one, further eliminates the error possibility that constant current source 4 brings.
As shown in Figure 2, a kind of contact resistance tester calibration device, comprises tested contact resistance tester 1, and tested contact resistance tester 1 inside is provided with constant current source 4 and voltage table 5.
Constant current source 4 output terminal of tested contact resistance tester 1 connects a reometer 3, and the voltage input end of tested contact resistance tester 1 connects a standard voltage source 2, and standard voltage source 2 is connected with the voltage table 5 in tested contact resistance tester 1.
For protective current table 3 is not damaged, in constant current source 4 output terminal and a protective resistance of connecting between reometer 3 of tested contact resistance tester 1, this protective resistance is adjustable resistance R.
By the measured value of the magnitude of voltage of standard voltage source 2 and reometer 3, be divided by according to Ohm law and obtain standard electric resistance; The setting value of the voltage that tested contact resistance tester 1 builtin voltage table 5 detects and constant current source 4, be divided by according to Ohm law and obtain the resistance displayed value of tested contact resistance tester 1, by standard electric resistance compared with resistance displayed value, thus can judge whether the resistance displayed value of tested contact resistance tester 1 exists error.
Tested contact resistance tester 1 can be the tester of digital line pointer-type, also can be that there is the electronic type tester that resistance refers to display screen, change the magnitude of voltage of standard voltage source 2, obtain resistance displayed values all in tested contact resistance tester 1 gamut, and calculate its corresponding standard electric resistance, thus can determine in tested contact resistance tester 1 gamut, whether all resistance displayed values exist error.
Compared with the mode adopting fixed value resistance to calibrate in prior art, this calibrating installation and method save the cost of multiple fixed value resistance, simplify calibration procedure, and can reach the covering completely to tested contact resistance tester 1 gamut calibration.
Compared with the mode adopting slide wire resistance to calibrate in prior art, this calibrating installation and method are not subject to the impact of the restriction of slide wire resistance material temperature coefficient and the contact resistance of slipper, effectively can ensure the calibration accuracy of tested contact resistance tester 1.
The calculating of process to standard uncertainty, verifies this calibrating installation and method meets transmission of quantity value principle, meets alignment requirements.
In sum, the calibrating installation of the present embodiment and method are by setting up reometer 3, get rid of the error possibility that constant current source 4 brings, can judge whether the resistance displayed value of tested contact resistance tester 1 exists error more accurately, and solve technical matters of the prior art, reach the effect regulating pointwise calibration continuously and improve calibration accuracy.
As mentioned above, plan content given by reference to the accompanying drawings, can derive similar technical scheme.In every case be the content not departing from technical solutions of the utility model, any simple modification done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (5)
1. a contact resistance tester calibration device, comprises contact resistance tester, it is characterized in that: the constant current source output head anode of described contact resistance tester is connected with negative pole, and the voltage input end of described contact resistance tester connects a voltage source.
2. a contact resistance tester calibration device, comprises contact resistance tester, it is characterized in that: the constant current source output terminal of described contact resistance tester connects a reometer, and the voltage input end of described contact resistance tester connects a voltage source.
3. a kind of contact resistance tester calibration device according to claim 2, is characterized in that: in constant current source output terminal and a protective resistance of connecting between described reometer of described contact resistance tester.
4. a kind of contact resistance tester calibration device according to claim 3, is characterized in that: described protective resistance is adjustable resistance.
5. a kind of contact resistance tester calibration device according to claim 1 and 2, is characterized in that: described voltage source is standard voltage source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520485286.7U CN204989442U (en) | 2015-07-08 | 2015-07-08 | Contact resistance tester calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520485286.7U CN204989442U (en) | 2015-07-08 | 2015-07-08 | Contact resistance tester calibrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204989442U true CN204989442U (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520485286.7U Active CN204989442U (en) | 2015-07-08 | 2015-07-08 | Contact resistance tester calibrating device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977557A (en) * | 2015-07-08 | 2015-10-14 | 南车青岛四方机车车辆股份有限公司 | Device and method for calibrating contact resistance tester |
| CN111044961A (en) * | 2018-10-15 | 2020-04-21 | 吴茂祥 | Test machine self-checking system and test method |
| CN115372710A (en) * | 2022-10-21 | 2022-11-22 | 西安创联电气科技（集团）有限责任公司 | Automatic resistance testing device |
-
2015
- 2015-07-08 CN CN201520485286.7U patent/CN204989442U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977557A (en) * | 2015-07-08 | 2015-10-14 | 南车青岛四方机车车辆股份有限公司 | Device and method for calibrating contact resistance tester |
| CN111044961A (en) * | 2018-10-15 | 2020-04-21 | 吴茂祥 | Test machine self-checking system and test method |
| CN115372710A (en) * | 2022-10-21 | 2022-11-22 | 西安创联电气科技（集团）有限责任公司 | Automatic resistance testing device |
| CN115372710B (en) * | 2022-10-21 | 2024-02-06 | 西安创联电气科技（集团）有限责任公司 | Automatic resistor testing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Jihongtan town Chengyang District Shandong city Qingdao province Jinhong road 266111 No. 88 Patentee after: CRRC QINGDAO SIFANG CO., LTD. Address before: Jihongtan town Chengyang District Shandong city Qingdao province Jinhong road 266111 No. 88 Patentee before: CSR Qingdao Sifang Locomotive and Rolling Stock Co., Ltd. |