CN105334350A - Method for testing resolution of high-precision accelerometer for gravimeter - Google Patents
Method for testing resolution of high-precision accelerometer for gravimeter Download PDFInfo
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- CN105334350A CN105334350A CN201510789160.3A CN201510789160A CN105334350A CN 105334350 A CN105334350 A CN 105334350A CN 201510789160 A CN201510789160 A CN 201510789160A CN 105334350 A CN105334350 A CN 105334350A
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- accelerometer
- resolution
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- dividing head
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Abstract
The invention belongs to the technical field of gravimeters and particularly relates to a method for testing the resolution of a high-precision accelerometer for a gravimeter. According to the method provided by the invention, an indexing head is still used for testing, but a test for an input shaft of the accelerometer, carried out near a horizontal line, is changed to a test carried out near a plumb line in conventional tests, and then the sensitive degree of the component change of the gravity acceleration of the input shaft of the accelerometer to the rotation angle of the indexing head is greatly reduced, thereby obviously reducing the influence of the precision of the indexing head to the test result. The method provided by the invention solves the technical problem that the existing method for testing the resolution of the accelerometer is difficult to meet the test requirement of high resolution of an accelerometer for a sea-air gravimeter. By using the method provided by the invention, under the condition that the performance requirement of conventional equipment does not need to be improved, the test precision of the resolution of the high-precision accelerometer is increased to the magnitude superior to 10<7>g, and the test requirement of high resolution of the accelerometer for the sea-air gravimeter can be met.
Description
Technical field
The invention belongs to gravity meter technical field, be specifically related to a kind of gravity meter high-precision accelerometer resolution test method.
Background technology
High-precision accelerometer has wide dynamic range, without advantages such as cross-couplings, progressively replaces traditional spring device and use as gravimeter in novel air-sea gravity meter.But the precision of high accuracy gravimeter is generally better than 1mGal, the accuracy requirement accordingly for gravimeter is also very high, requires that the resolution of accelerometer used at least reaches 10
-7the magnitude of g, this exceeds 1 ~ 2 order of magnitude than the technical indicator of accelerometer used in general inertia system.
For the test of accelerometer resolution, usual way is that degree of will speed up meter is arranged on high precision dividing head, makes accelerometer measures input shaft near surface level.By controlling calibration head-turned angle, the component of fine adjustment acceleration of gravity on accelerometer measures input shaft, as the input reference of accelerometer measures.Testing acceleration meter Output rusults simultaneously, the key between being inputted by the output of contrast accelerometer and benchmark, determines the resolution of accelerometer.According to the method, even not considering the impact of the factor such as ground, installation ideally, the precision of accelerometer resolution be made to reach 10
-7the magnitude of g, then the precision of dividing head is at least better than 0.1 ".And current high precision dividing head precision is generally 1 ", be difficult to reach test request.
Summary of the invention
The technical issues that need to address of the present invention are: existing accelerometer resolution test method is difficult to meet the high-resolution test request of air-sea gravity meter accelerometer.
Technical scheme of the present invention is as described below:
A kind of gravity meter high-precision accelerometer resolution test method, comprises the following steps:
Step 1, by dividing head return to zero, when dividing head angle is zero, installed surface is in surface level;
Step 2, by install frock degree of will speed up meter be arranged on dividing head, make the measurement input shaft of accelerometer parallel with pedal line, forward refers to sky.
Step 3, connection accelerometer power supply, start-up temperature control device and accelerometer, waiting temperature control device is stablized and accelerometer stable output; State temperature control equipment for controlling the ambient temperature-stable of accelerometer at a steady state value.
Step 4, meter initial position dividing head registration are U
0, record the output V of now accelerometer
0+; Make dividing head to rotating forward, making it rest on registration successively is respectively U
i+(i=1,2,3,4,5 ..., N; N>=5) position; During each stop, after accelerometer stable output, the output V of now accelerometer need be recorded
i+, continue a downward position after completing record and rotate, until the record that the accelerometer completing all N number of positions exports;
Step 5, dividing head is returned to initial position U
0, the output V of record accelerometer
0-; Dividing head is rotated to negative sense, and making it rest on registration successively is respectively U
i-(i=1,2,3,4,5 ..., N; N>=5) position; During each stop, after accelerometer stable output, the output V of now accelerometer need be recorded
0-, continue a downward position after completing record and rotate, until the record that the accelerometer completing all N number of positions exports;
Step 6, closing temperature control device and accelerometer, according to test recorded data, carry out the judgement of resolution;
The described concrete grammar judged as:
Ask for the difference of equidirectional adjacent position test data, and judge according to following formula:
|V
i+-V
(i-1)+|＞0.5Δθ，
|V
i--V
(i-1)-|＞0.5Δθ，
If all test datas all meet above-mentioned two formulas, then judge that accelerometer resolution meets the demands, otherwise then judge that accelerometer resolution does not meet the demands.
Preferably, in step 4 and 5, described turned position U
i+and U
i-determine by following principle:
If resolution index request is Δ θ, then:
|cos(U
i+)-cos(U
(i-1)+)|＝Δθ，(i＝1,2,3,4,5…N)，
|cos(U
i-)-cos(U
(i-1)-)|＝Δθ，(i＝1,2,3,4,5…N)。
Beneficial effect of the present invention is:
Use method of the present invention, when not needing to improve conventional equipment performance requirement, the measuring accuracy of high-precision accelerometer resolution can be promoted to and be better than 10
-7the magnitude of g, can meet the high-resolution test request of air-sea gravity meter accelerometer, for the development and application of gravity meter accelerometer provides technical guarantee.
Embodiment
Gravity meter high-precision accelerometer resolution test method of the present invention, dividing head is still utilized to test, but input axis of accelerometer in conventionally test is carried out near level test to have changed into and testing near pedal line, significantly reduce the sensitivity of input axis of accelerometer gravitational acceleration component change for dividing head rotational angle, thus significantly reduce the impact of dividing head precision for test result.
Its concrete steps are as follows:
Step 1, by dividing head return to zero, when dividing head angle is zero, installed surface is in surface level.
Step 2, by install frock degree of will speed up meter be arranged on dividing head, make the measurement input shaft of accelerometer parallel with pedal line, forward refers to sky.
Step 3, connection accelerometer power supply, start-up temperature control device and accelerometer, waiting temperature control device is stablized and accelerometer stable output; Described temperature control equipment is for controlling the ambient temperature-stable of accelerometer at a steady state value.
Step 4, meter initial position dividing head registration are U
0, record the output V of now accelerometer
0+; Make dividing head to rotating forward, making it rest on registration successively is respectively U
i+(i=1,2,3,4,5 ..., N; N>=5) position.During each stop, after accelerometer stable output, the output V of now accelerometer need be recorded
i+, continue a downward position after completing record and rotate, until the record that the accelerometer completing all N number of positions exports.
If resolution index request is Δ θ, then turned position U
i+determine in such a way:
|cos(U
i+)-cos(U
(i-1)+)|＝Δθ，(i＝1,2,3,4,5…N)。
Step 5, dividing head is returned to initial position U
0, the output V of record accelerometer
0-.Dividing head is rotated to negative sense, and making it rest on registration successively is respectively U
i-(i=1,2,3,4,5 ..., N; N>=5) position.During each stop, after accelerometer stable output, the output V of now accelerometer need be recorded
0-, continue a downward position after completing record and rotate, until the record that the accelerometer completing all N number of positions exports.
If resolution index request is Δ θ, then turned position U
i-determine in such a way:
|cos(U
i-)-cos(U
(i-1)-)|＝Δθ，(i＝1,2,3,4,5…N)。
Step 6, closing temperature control device and accelerometer, according to test recorded data, carry out the judgement of resolution.The described concrete grammar judged as:
Ask for the difference of equidirectional adjacent position test data, and judge according to following formula:
|V
i+-V
(i-1)+|＞0.5Δθ，(i＝1,2,3,4,5…N)
|V
i--V
(i-1)-|＞0.5Δθ，(i＝1,2,3,4,5…N)
If all test datas all meet above-mentioned two formulas, then judge that accelerometer resolution meets the demands, otherwise then judge that accelerometer resolution does not meet the demands.
Adopt in this way, when resolution index request is 1 × 10
-7during g, as shown in table 1 below according to positive and negative each 5 test positions chosen.
Table 1 dividing head turned position is shown
| U 5+ | U 4+ | U 3+ | U 2+ | U 1+ | U 1- | U 2- | U 3- | U 4- | U 5- |
| -185" | -160" | -130" | -92" | 90° | +92" | +130" | +160" | +185" | -185" |
With said method, 1 " test error that dividing head error is brought is less than 5 × 10
-9g, therefore applies conventional equipment and completes and can meet 1 × 10
-7the test request of g resolution index, does not need to significantly improve the technical requirement for the first-class testing apparatus of calibration.
Claims (2)
1. a gravity meter high-precision accelerometer resolution test method, is characterized in that: comprise the following steps:
Step 1, by dividing head return to zero, when dividing head angle is zero, installed surface is in surface level;
Step 2, by install frock degree of will speed up meter be arranged on dividing head, make the measurement input shaft of accelerometer parallel with pedal line, forward refers to sky;
Step 3, connection accelerometer power supply, start-up temperature control device and accelerometer, waiting temperature control device is stablized and accelerometer stable output; State temperature control equipment for controlling the ambient temperature-stable of accelerometer at a steady state value;
Step 4, meter initial position dividing head registration are U
0, record the output V of now accelerometer
0+; Make dividing head to rotating forward, making it rest on registration successively is respectively U
i+(i=1,2,3,4,5 ..., N; N>=5) position; During each stop, after accelerometer stable output, the output V of now accelerometer need be recorded
i+, continue a downward position after completing record and rotate, until the record that the accelerometer completing all N number of positions exports;
Step 5, dividing head is returned to initial position U
0, the output V of record accelerometer
0-; Dividing head is rotated to negative sense, and making it rest on registration successively is respectively U
i-(i=1,2,3,4,5 ..., N; N>=5) position; During each stop, after accelerometer stable output, the output V of now accelerometer need be recorded
0-, continue a downward position after completing record and rotate, until the record that the accelerometer completing all N number of positions exports;
Step 6, closing temperature control device and accelerometer, according to test recorded data, carry out the judgement of resolution;
The described concrete grammar judged as:
Ask for the difference of equidirectional adjacent position test data, and judge according to following formula:
|V
i+-V
(i-1)+|＞0.5Δθ，
|V
i--V
(i-1)-|＞0.5Δθ，
If all test datas all meet above-mentioned two formulas, then judge that accelerometer resolution meets the demands, otherwise then judge that accelerometer resolution does not meet the demands.
2. gravity meter high-precision accelerometer resolution test method as claimed in claim 1, is characterized in that: in step 4 and 5, described turned position U
i+and U
i-determine by following principle:
If resolution index request is Δ θ, then:
|cos(U
i+)-cos(U
(i-1)+)|＝Δθ，(i＝1,2,3,4,5…N)，
|cos(U
i-)-cos(U
(i-1)-)|＝Δθ，(i＝1,2,3,4,5…N)。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111913229A (en) * | 2020-08-03 | 2020-11-10 | 中国自然资源航空物探遥感中心 | Sea-air gravity network cross point searching method and device |
| CN113566744A (en) * | 2021-07-29 | 2021-10-29 | 大连探索者科技有限公司 | High-precision testing method for resolution of photoelectric angle sensor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090013755A1 (en) * | 2007-07-10 | 2009-01-15 | Polstar Technologies Inc. | Calibration jig and algorithms for accelerometer |
| CN102519487A (en) * | 2011-12-14 | 2012-06-27 | 浙江大学 | Method for evaluating resolution of fiber-optic gyroscope |
| CN102636664A (en) * | 2012-04-23 | 2012-08-15 | 北京航天控制仪器研究所 | Method for dynamically estimating accelerometer resolution |
| CN102788887A (en) * | 2012-08-23 | 2012-11-21 | 北京航空航天大学 | Resolution test method for high-precision accelerometers |
| CN103884870A (en) * | 2014-03-13 | 2014-06-25 | 工业和信息化部电子第五研究所 | Method and device for improving accelerometer calibration accuracy |
| CN104122413A (en) * | 2014-07-31 | 2014-10-29 | 工业和信息化部电子第五研究所 | Accelerometer performance parameter detection method and accelerometer performance parameter detection system |
| CN104914485A (en) * | 2015-06-29 | 2015-09-16 | 中国船舶重工集团公司第七0七研究所 | Resolution test method for accelerometer under 1g input excitation |
-
2015
- 2015-11-17 CN CN201510789160.3A patent/CN105334350B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090013755A1 (en) * | 2007-07-10 | 2009-01-15 | Polstar Technologies Inc. | Calibration jig and algorithms for accelerometer |
| CN102519487A (en) * | 2011-12-14 | 2012-06-27 | 浙江大学 | Method for evaluating resolution of fiber-optic gyroscope |
| CN102636664A (en) * | 2012-04-23 | 2012-08-15 | 北京航天控制仪器研究所 | Method for dynamically estimating accelerometer resolution |
| CN102788887A (en) * | 2012-08-23 | 2012-11-21 | 北京航空航天大学 | Resolution test method for high-precision accelerometers |
| CN103884870A (en) * | 2014-03-13 | 2014-06-25 | 工业和信息化部电子第五研究所 | Method and device for improving accelerometer calibration accuracy |
| CN104122413A (en) * | 2014-07-31 | 2014-10-29 | 工业和信息化部电子第五研究所 | Accelerometer performance parameter detection method and accelerometer performance parameter detection system |
| CN104914485A (en) * | 2015-06-29 | 2015-09-16 | 中国船舶重工集团公司第七0七研究所 | Resolution test method for accelerometer under 1g input excitation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111913229A (en) * | 2020-08-03 | 2020-11-10 | 中国自然资源航空物探遥感中心 | Sea-air gravity network cross point searching method and device |
| CN111913229B (en) * | 2020-08-03 | 2023-03-24 | 中国自然资源航空物探遥感中心 | Sea-air gravity network cross point searching method and device |
| CN113566744A (en) * | 2021-07-29 | 2021-10-29 | 大连探索者科技有限公司 | High-precision testing method for resolution of photoelectric angle sensor |
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