CN104198115A - Calibration device for detecting vacuum gauges with relative errors of indicating values no less than 30% - Google Patents
Calibration device for detecting vacuum gauges with relative errors of indicating values no less than 30% Download PDFInfo
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- CN104198115A CN104198115A CN201410488942.9A CN201410488942A CN104198115A CN 104198115 A CN104198115 A CN 104198115A CN 201410488942 A CN201410488942 A CN 201410488942A CN 104198115 A CN104198115 A CN 104198115A
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Abstract
The invention discloses a calibration device for detecting vacuum gauges with relative errors of indicating values no less than 30%. The calibration device comprises a vacuum pump, a standard vacuum gauge, a calibrated vacuum gauge, a calibration room and connection pipelines. The vacuum pump is connected with the calibration room through a pipeline provided with a control valve, the connection pipeline is communicated with the calibration room, and the standard vacuum gauge and the calibrated vacuum gauge are mounted at ports of the connection pipelines. The calibration device is simple in structure, convenient to operate and low in cost; due to the fact that the plurality of connection pipelines are welded to two ends of the calibration room, a plurality of calibrated vacuum gauges can be detected at the same time, and accordingly detection efficiency is improved.
Description
Technical field
The present invention relates to a kind of calibrating installation that is not less than 30% vacuum meter for detection of relative error of indicating value.
Background technology
Vacuum meter is the monitoring instrument in motor vacuum paint dipping process, and whether it accurately directly affects the effect of dipping lacquer, is related to the quality of motor.Motor manufacturing technology files specify: in the motor production run more than 6kv, fixed subcoil insulating must carry out strict vacuum paint dipping in manufacture process.In the process of vacuum paint dipping, adopt vacuum meter to monitor vacuum tightness.Whether vacuum meter is accurately directly connected to dipping lacquer effect.If vacuum meter indicating value is inaccurate, the air in stator and coil air gap cannot extract completely, cause dipping lacquer not in place.Such motor is on-stream, and too high electric field will produce corona on these air, destroys insulation, finally causes motor to burn out.Quality in order to ensure motor just needs to guarantee accuracy and the reliability of vacuum meter in dipping lacquer process, therefore must carry out measurement and calibration to vacuum meter.The leading products of motor Shi Wo company and the relative error of indicating value of resistance vacuum gauge used are 30% at present, because company there is no calibrating installation, and province, this metering of city metrological service belong to blank, must send someone vacuum meter to send Beijing China metering universities and colleges accurate, need back and forth half wheat harvesting period, instrument has the possibility of damage on the way at any time, if vacuum meter goes wrong in alignment epoch, cannot calibrate at any time, to production, has brought great inconvenience; And the relative error of indicating value of my company's vacuum meter used is 30%, also can be without the Stage Calibration Equipments such as high precision of Beijing China metering institute.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of simple in structure, with low cost, easy to operate, detect reliable, efficiency is high for detection of relative error of indicating value, is not less than the calibrating installation of 30% vacuum meter.
The technical solution used in the present invention is: a kind of calibrating installation that is not less than 30% vacuum meter for detection of relative error of indicating value, comprise vacuum pump, standard vacuum gauge, by school vacuum meter, calibration chamber and take over pipeline, described vacuum pump is connected with calibration chamber by pipeline, the pipeline that vacuum pump is connected with calibration chamber is provided with by-pass valve control, described adapter pipeline is communicated with calibration chamber, described standard vacuum gauge with by school vacuum meter, be arranged at the port of taking over pipeline.
In the above-mentioned calibrating installation that is not less than 30% vacuum meter for detection of relative error of indicating value, described calibration chamber is cylindrical, the two ends of calibration chamber are welded with adapter pipeline, the middle part of the side of calibration chamber is welded with valve, fine tuning valve and connecting interface, and connecting interface is connected with vacuum pump by pipeline.
In the above-mentioned calibrating installation that is not less than 30% vacuum meter for detection of relative error of indicating value, described standard vacuum gauge adopts capacitor thin film vacuum meter, and its relative error of indicating value is not more than 10%, and the described relative error of indicating value by school vacuum meter is not less than 30%.
In the above-mentioned calibrating installation that is not less than 30% vacuum meter for detection of relative error of indicating value, described calibration chamber two ends are welded with a plurality of adapter pipelines.
In the above-mentioned calibrating installation that is not less than 30% vacuum meter for detection of relative error of indicating value, the right cylinder that the ratio that is shaped as height and internal diameter of described calibration chamber is 1～3/1.
Compared with prior art, beneficial effect of the present invention is:
1) device that the present invention selects only has vacuum pump, calibration chamber, standard vacuum gauge, connecting tube, fine tuning valve and valve, and wherein the specification of standard vacuum gauge can be calculated and determine according to the relative error of indicating value value by school vacuum meter, and cost is very low.
2) the present invention requires low, simple, convenient to measurement environment.
3) calibration chamber of the present invention two ends are welded with a plurality of adapter pipelines, can detect simultaneously a plurality of by school vacuum meter, thereby improved detection efficiency.
4) the present invention is by taking into account standard vacuum by the uncertainty evaluation of the relative error of indicating value of school vacuum meter, press again the uncertainty of formula calculating synthetic standards, according to result of calculation, can verify that this calibrating installation can meet the calibration that relative error of indicating value used is not less than 30% vacuum meter completely.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As shown in Figure 1, the present invention includes vacuum pump 1, standard vacuum gauge 4, by school vacuum meter 9, calibration chamber 6 and take over pipeline 5.Described calibration chamber 6 be shaped as the right cylinder that height and the ratio of internal diameter are 1～3/1, the two ends of calibration chamber 6 are welded with respectively two adapter pipelines 5, the middle part of the side of calibration chamber 6 is welded with valve 7, fine tuning valve 8 and connecting interface, connecting interface is connected with vacuum pump 1 by pipeline 2, and pipeline 2 is provided with by-pass valve control 3.Described standard vacuum gauge 4 with by school vacuum meter 9, be arranged on respectively at the port of taking over pipeline 5.
Principle of the present invention is as follows: the present invention adopts running balancing principle and gas continuity principle, inject the gas of constant basis to calibration chamber 6, when the pump speed balance with vacuum pump 1, when the even and stable transient equilibrium pressure of the interior formation of calibration chamber 6, to being arranged on the standard vacuum gauge 4 at calibration chamber 6 two ends and being compared by school vacuum meter 9, reach being calibrated by school vacuum meter 9, guarantee by the monitoring quality of school vacuum meter 9.Concrete operations are as follows:
First the connecting pipe of standard vacuum gauge 4 is arranged on the port of adapter pipeline 5 on calibration chamber 6 left sides, by the connecting pipe of school vacuum meter 9, be arranged on the port of adapter pipeline 5 on calibration chamber 6 the right, because calibration chamber 6 two ends are welded with a plurality of adapter pipelines 5, therefore, can detect simultaneously respective numbers by school vacuum meter 9.Closing control valve 3 and fine tuning valve 8, open valve 7, and making the vacuum tightness in calibration chamber 6 is atmospheric pressure 100,000 handkerchiefs, is connected to the standard vacuum gauge 4 at calibration chamber 6 two ends and shown a standard atmospheric pressure by school vacuum meter 9 simultaneously; Now write down data, then valve 7 is closed, open by-pass valve control 3, opening power is evacuated to the interior vacuum tightness of calibration chamber 6 below 5 handkerchiefs from 100,000 handkerchiefs with vacuum pump 1 within 10min again, (according to the demonstration data judging of standard vacuum gauge 4), rear closing control valve 3, after ten minutes, the vacuum pressure changing value of calibration chamber 6 is not more than 1%(according to the demonstration data judging of standard vacuum gauge 4), now write down standard vacuum gauge 4 and all by the data of school vacuum meter 9; Open fine tuning valve 8, atmosphere is passed into calibration chamber 6, make the vacuum tightness in calibration chamber 6 drop to certain value by certain requirement, and the vacuum pressure of variation is presented at and is allly arranged on vacuum meter 4 in calibration chamber and by school vacuum meter 9, contrast standard vacuum meter 4 and by the demonstration data of school vacuum meter 9 again, revise again, reach the object of calibration.
Calibration is during by school vacuum meter 9, standard vacuum gauge 4 adopts capacitor thin film vacuum meter, and its relative error of indicating value is not more than 10%, by the relative error of indicating value of school vacuum meter 9, is not less than 30%, by the evaluation of the relative error of indicating value uncertainty to two vacuum meters, then press formula
calculate the uncertainty of synthetic standards, the detecting reliability of pick-up unit is verified.
Formula
in:
----expression combined standard uncertainty.
the uncertainty that-------expression input quantity alignment standard meter causes.
the uncertainty that-------expression input quantity alignment standard meter error of indication causes.
the not repeated uncertainty causing of tested instrument measurement in-------expression input quantity.
In actual applications, have been found that pick-up unit according to the present invention detects and has significant advantage, very simple and reliable.
Be more than one embodiment of the present invention, a preferred demonstration example.The scope that the present patent application is asked for protection has more than and is limited to described embodiment.All and technical scheme the present embodiment equivalence all belongs to protection scope of the present invention.
Claims (5)
1. a calibrating installation that is not less than 30% vacuum meter for detection of relative error of indicating value, it is characterized in that: comprise vacuum pump, standard vacuum gauge, by school vacuum meter, calibration chamber and take over pipeline, described vacuum pump is connected with calibration chamber by pipeline, the pipeline that vacuum pump is connected with calibration chamber is provided with by-pass valve control, described adapter pipeline is communicated with calibration chamber, described standard vacuum gauge with by school vacuum meter, be arranged at the port of taking over pipeline.
2. in the calibrating installation that is not less than 30% vacuum meter for detection of relative error of indicating value according to claim 1, it is characterized in that: described calibration chamber is cylindrical, the two ends of calibration chamber are welded with adapter pipeline, the middle part of the side of calibration chamber is welded with valve, fine tuning valve and connecting interface, and connecting interface is connected with vacuum pump by pipeline.
3. in the calibrating installation that is not less than 30% vacuum meter for detection of relative error of indicating value according to claim 1, it is characterized in that: described standard vacuum gauge adopts capacitor thin film vacuum meter, its relative error of indicating value is not more than 10%, and the described relative error of indicating value by school vacuum meter is not less than 30%.
4. in the calibrating installation that is not less than 30% vacuum meter for detection of relative error of indicating value according to claim 1, it is characterized in that: described calibration chamber two ends are welded with a plurality of adapter pipelines.
5. in the calibrating installation that is not less than 30% vacuum meter for detection of relative error of indicating value according to claim 1, it is characterized in that: the right cylinder that the ratio that is shaped as height and internal diameter of described calibration chamber is 1～3/1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410488942.9A CN104198115A (en) | 2014-09-23 | 2014-09-23 | Calibration device for detecting vacuum gauges with relative errors of indicating values no less than 30% |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410488942.9A CN104198115A (en) | 2014-09-23 | 2014-09-23 | Calibration device for detecting vacuum gauges with relative errors of indicating values no less than 30% |
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| CN104198115A true CN104198115A (en) | 2014-12-10 |
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| CN201410488942.9A Pending CN104198115A (en) | 2014-09-23 | 2014-09-23 | Calibration device for detecting vacuum gauges with relative errors of indicating values no less than 30% |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136388A (en) * | 2015-05-26 | 2015-12-09 | 芜湖致通汽车电子有限公司 | Batch debugging system for vacuum pressure sensors |
| CN107885178A (en) * | 2017-12-22 | 2018-04-06 | 温州瓯云科技有限公司 | A kind of detection means of electronic type vacuum pressure controller |
| CN107894301A (en) * | 2017-12-15 | 2018-04-10 | 芜湖致通汽车电子有限公司 | A kind of vacuum pressure sensor experimental rig and method |
| CN108062090A (en) * | 2017-12-22 | 2018-05-22 | 温州瓯云科技有限公司 | A kind of detection device of electronic type vacuum pressure controller |
| CN114018474A (en) * | 2021-09-16 | 2022-02-08 | 兰州空间技术物理研究所 | Capacitance signal adjusting and measuring device before packaging of capacitance film vacuum gauge |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN200955987Y (en) * | 2006-09-27 | 2007-10-03 | 西安航空发动机（集团）有限公司 | Portable vacuum gauge calibrating device |
| CN202216802U (en) * | 2011-09-27 | 2012-05-09 | 江苏东方航天校准检测有限公司 | Wide-range in-situ calibrating device for vacuum gauge |
| CN203191151U (en) * | 2012-12-21 | 2013-09-11 | 黄鸣 | Vacuum gauge automatic calibrating device |
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2014
- 2014-09-23 CN CN201410488942.9A patent/CN104198115A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200955987Y (en) * | 2006-09-27 | 2007-10-03 | 西安航空发动机（集团）有限公司 | Portable vacuum gauge calibrating device |
| CN202216802U (en) * | 2011-09-27 | 2012-05-09 | 江苏东方航天校准检测有限公司 | Wide-range in-situ calibrating device for vacuum gauge |
| CN203191151U (en) * | 2012-12-21 | 2013-09-11 | 黄鸣 | Vacuum gauge automatic calibrating device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136388A (en) * | 2015-05-26 | 2015-12-09 | 芜湖致通汽车电子有限公司 | Batch debugging system for vacuum pressure sensors |
| CN107894301A (en) * | 2017-12-15 | 2018-04-10 | 芜湖致通汽车电子有限公司 | A kind of vacuum pressure sensor experimental rig and method |
| CN107885178A (en) * | 2017-12-22 | 2018-04-06 | 温州瓯云科技有限公司 | A kind of detection means of electronic type vacuum pressure controller |
| CN108062090A (en) * | 2017-12-22 | 2018-05-22 | 温州瓯云科技有限公司 | A kind of detection device of electronic type vacuum pressure controller |
| CN114018474A (en) * | 2021-09-16 | 2022-02-08 | 兰州空间技术物理研究所 | Capacitance signal adjusting and measuring device before packaging of capacitance film vacuum gauge |
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Application publication date: 20141210 |