CN111380486A - High-resolution angular displacement measuring device and method for micro-thrust measurement - Google Patents
High-resolution angular displacement measuring device and method for micro-thrust measurement Download PDFInfo
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- CN111380486A CN111380486A CN202010217268.6A CN202010217268A CN111380486A CN 111380486 A CN111380486 A CN 111380486A CN 202010217268 A CN202010217268 A CN 202010217268A CN 111380486 A CN111380486 A CN 111380486A
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- archimedes
- measuring
- measuring block
- displacement sensor
- angular displacement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
Abstract
The invention discloses a high-resolution angular displacement measuring device and method for measuring micro thrust. The measuring device comprises a laser displacement sensor, a bracket, an Archimedes measuring block and a data acquisition instrument, wherein the Archimedes measuring block coaxially rotates along with a measured target, the outer diameter of the Archimedes measuring block linearly increases along with an azimuth angle, and the angular displacement of the measured target is calculated by measuring the change of the distance between the laser sensor and the side surface of the Archimedes measuring block; the measuring step comprises (1) the laser displacement sensor emits measuring light to measure the distance between the measuring light and the lateral surface of the Archimedes measuring block, (2) the data acquisition instrument acquires and records the analog signal voltage output by the laser displacement sensor, and (3) the angular displacement of the measured target is calculated through the change of the output voltage. The invention has simple principle, fast response speed during measurement and high measurement resolution, and solves the defects of complex principle, high manufacturing cost, high debugging difficulty and the like of the conventional angular displacement measurement method.
Description
Technical Field
The invention relates to the technical field of measurement, in particular to a high-resolution angular displacement measuring device and method for micro-thrust measurement.
Background
The ground thrust measurement of the micro thruster is an essential key link in the development process of the micro thruster, and the precise measurement of the micro thrust can provide necessary reference data for design improvement, parameter selection and performance evaluation of the micro thruster. The thrust of the micro thruster is usually mN level or even mu N level, and is difficult to directly measure through a force sensorSome micro-thrust measuring devices mostly calculate the magnitude of thrust by measuring the displacement or deformation of a rack under the action of thrust. MIT and North navigation respectively provide a micro thrust measurement mode based on a magnetic suspension bearing, and the method calculates the micro thrust by measuring the angular displacement of a suspension rotor under the action of a thruster. However, the thrust-weight ratio of the micro-thruster is very small, usually lower than<10-5The resolution of the angular displacement measurement puts high demands on it.
The invention provides a high-resolution angular displacement measuring device and method for measuring micro thrust, and the device and method have the remarkable advantages of high response speed, high measurement resolution, low manufacturing cost and the like.
Disclosure of Invention
The invention aims to: in view of the above problems, a high resolution angular displacement measuring device for micro thrust measurement and a method thereof are provided. The technical scheme of the invention is as follows:
a high resolution angular displacement measurement device for micro thrust measurements, comprising: the laser displacement sensor can output the displacement change of a measured target as analog signal voltage, the response time of the laser displacement sensor is not more than 5ms, and the measurement resolution can reach 2 mu m; the support is used for fixedly mounting the laser displacement sensor and can adjust the vertical height and the horizontal position of the laser sensor; the data acquisition instrument can receive and record analog signals output by the acquisition laser displacement sensor; the device comprises an Archimedes measuring block, wherein the measuring block is coaxially and fixedly connected with a tested target and synchronously rotates along with the tested target, the outer diameter R (unit: mm) of the measuring block linearly increases along with the increase of an azimuth angle theta (unit: DEG), and the following mathematical relation is satisfied:
R＝72+(1/5)×θ(0≤θ≤360°)
accordingly, the angle change amount Δ θ (unit: °) of the archimedes measurement block satisfies the following mathematical relationship:
Δθ＝5×ΔR
wherein Δ R (unit: mm) is the amount of change in the outer diameter of the Archimedes measuring block. The measurement resolution of the laser displacement sensor is 0.002mm, and the corresponding angular displacement measurement resolution is 0.01 degrees.
A high-resolution angular displacement measurement method for micro-thrust measurement comprises the following steps:
(1) the laser displacement sensor emits measuring light to measure a distance L (unit: mm) between the measuring light and a side surface of the Archimedes measuring block;
(2) the data acquisition instrument acquires and records the analog signal voltage U (unit: V) output by the laser displacement sensor;
(3) and calculating the angular displacement variation delta theta (unit:) of the Archimedes measuring block according to the variation delta U (unit: V) of the analog signal voltage.
Further, in the step (3), a variation Δ U of the analog signal U recorded by the data acquisition instrument satisfies the following mathematical relationship:
ΔU＝ΔL＝ΔR
wherein Δ L (unit: mm) is the amount of change in the distance between the laser displacement sensor and the archimedes measurement block.
At any moment, the angular displacement of the mechanism to be measured is:
Δθ＝5×ΔU
the invention has the advantages that:
1) the principle is simple, and the angular displacement delta theta of the measured target can be solved by measuring only one physical quantity U;
2) the response speed is high, and the response time of the laser displacement sensor is not more than 5 ms;
3) the measurement resolution is high, the measurement resolution of the laser displacement sensor can reach 2 mu m, and the corresponding angular displacement measurement resolution can reach 0.01 degree;
4) the non-contact measurement does not cause any interference to the motion state of the measured target.
Drawings
FIG. 1 is a schematic view of a measuring device according to the present invention;
FIG. 2 is a schematic view of an Archimedes measurement block of the present invention;
FIG. 3 is a schematic view of the measurement principle of the present invention;
FIG. 4 is a flow chart of a measurement method of the present invention.
1-a laser displacement sensor; 2-archimedes measurement block; 3-a scaffold; 4-data acquisition instrument.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The invention relates to a non-contact high-resolution angular displacement measuring device based on a laser displacement sensor, which is shown in figure 1 and comprises a laser displacement sensor 1, an Archimedes measuring block 2, a bracket 3 and a data acquisition instrument 4;
laser displacement sensor 1 can be with the distance change Δ L who detects transform analog signal Δ U output, and every change 1mm apart from, output voltage strain 1V, promptly:
ΔU＝ΔL
the measurement repeatability error of the laser displacement sensor 1 is not more than 2 mu m, and the response time is not more than 5 ms;
the laser displacement sensor 1 is fixed on the bracket 3 through a screw and keeps static during measurement;
the support 3 comprises a vertical linear guide rail and a horizontal linear guide rail, the laser displacement sensor 1 and the Archimedes measuring block 2 are adjusted to keep the same height before measurement, and the transmitting end of the laser displacement sensor 1 is adjusted to be aligned to the circle center of the Archimedes measuring block 2;
the Archimedes measuring block 2 is formed by high-precision linear cutting, a threaded hole is formed in the center, the Archimedes measuring block is coaxially and fixedly connected with a measured target through a screw, the Archimedes measuring block synchronously rotates along with the measured target during measurement, the outer diameter R of the Archimedes measuring block linearly increases along with the increase of an azimuth angle, and the following mathematical relationship is met:
R＝72+(1/5)×θ(0≤θ≤360°)
the data acquisition instrument 4 is connected with a computer and can acquire and record the analog signal voltage output by the laser displacement sensor 1.
The invention discloses a high-resolution angular displacement measuring method for micro-thrust measurement, which comprises the following measuring steps as shown in figure 4:
step one, the laser displacement sensor 1 emits measuring light to measure the distance L between the measuring light and the side surface of the Archimedes measuring block 2;
further, a distance variation Δ L between the laser displacement sensor 1 and a side surface of the archimedes measuring block 2 satisfies the following mathematical relationship:
ΔL＝ΔR＝(1/5)×Δθ
step two, the data acquisition instrument 4 acquires and records the analog signal voltage U output by the laser displacement sensor;
and thirdly, calculating the angular displacement variation delta theta of the Archimedes measuring block according to the variation delta U of the analog signal voltage.
Further, the variation Δ U of the analog signal U recorded by the data acquisition instrument 4 satisfies the following mathematical relationship:
ΔU＝ΔL＝ΔR＝(1/5)×Δθ
therefore, at any time, the angular displacement of the object to be measured is Δ θ equal to 5 × Δ U
The invention provides a high-resolution angular displacement measuring device for measuring micro thrust, and discloses a corresponding measuring method.
Claims (4)
1. The high-resolution angular displacement measuring device for measuring the micro thrust is characterized by comprising a laser displacement sensor, a support for installing and adjusting the height and the horizontal position of the laser sensor, an Archimedes measuring block and a data acquisition instrument for acquiring and recording output signals of the laser sensor.
The laser displacement sensor is fixed on the bracket through a screw, the height of the laser displacement sensor is adjusted by the bracket to be the same as that of the Archimedes measuring block, and the laser emitting end of the laser displacement sensor is aligned to the circle center of the Archimedes measuring block; the Archimedes measuring block is formed by high-precision linear cutting, a threaded hole is formed in the center, the Archimedes measuring block is coaxially and fixedly connected with a measured target through a screw, and the Archimedes measuring block synchronously rotates along with the measured target during measurement; the data acquisition instrument is connected with the computer and can acquire and record the analog signal voltage output by the laser displacement sensor.
2. The high resolution angular displacement measuring device for micro thrust measurement as claimed in claim 1, wherein the outer diameter of the archimedes measuring block increases linearly with azimuth angle, and the outer diameter R and the angle θ satisfy the following mathematical relationship:
R＝72+(1/5)×θ (0≤θ≤360°)
3. a high-resolution angular displacement measurement method for micro-thrust measurement is characterized by comprising the following steps:
(1) the laser displacement sensor emits measuring light to measure the distance between the measuring light and the lateral surface of the Archimedes measuring block;
(2) the data acquisition instrument acquires and records the analog signal voltage output by the laser displacement sensor;
(3) and calculating the angular displacement variable quantity of the Archimedes measuring block according to the variable quantity of the analog signal voltage.
4. The method of claim 3, wherein the specially designed Archimedes measuring block is used to convert the angular displacement change of the measured object into the distance change between the laser displacement sensor and the side surface of the Archimedes measuring block, and the measurement resolution can reach 0.01 °.
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| CN202010217268.6A CN111380486A (en) | 2020-03-25 | 2020-03-25 | High-resolution angular displacement measuring device and method for micro-thrust measurement |
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| CN202010217268.6A CN111380486A (en) | 2020-03-25 | 2020-03-25 | High-resolution angular displacement measuring device and method for micro-thrust measurement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904361A (en) * | 2020-12-10 | 2021-06-04 | 成都飞机工业（集团）有限责任公司 | Engine thrust line accurate measurement method based on laser scanning |
| CN113701608A (en) * | 2021-07-29 | 2021-11-26 | 东风汽车零部件(集团)有限公司刃量具分公司 | Gear timing angle checking fixture |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044708A (en) * | 1989-02-04 | 1990-08-15 | 张建华 | Mutual calibration angle gauge and measuring method thereof |
| US5982479A (en) * | 1997-02-14 | 1999-11-09 | Medar, Inc. | Method for calibrating a tilt inspection system and reference disk assembly for use therein |
| CN202869443U (en) * | 2012-09-29 | 2013-04-10 | 无锡市政设计研究院有限公司 | Integrated displacement and rotation angle sensor with fiber Bragg gratings |
| PL219399B1 (en) * | 2011-12-27 | 2015-04-30 | Politechnika Białostocka | Device for non-contact measurement of elongation and the angle of torsion of structural elements |
| CN204373621U (en) * | 2015-01-08 | 2015-06-03 | 佛山轻子精密测控技术有限公司 | A kind of Novel angle displacement measuring device |
| CN109632252A (en) * | 2018-12-27 | 2019-04-16 | 中国航天空气动力技术研究院 | The vibration angle displacement measuring device and method of outer formula forced vibration dynamic derivative test |
| CN110307789A (en) * | 2019-07-19 | 2019-10-08 | 哈尔滨工业大学 | One kind being based on maglev float circumferential direction angular displacement controllable device |
-
2020
- 2020-03-25 CN CN202010217268.6A patent/CN111380486A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044708A (en) * | 1989-02-04 | 1990-08-15 | 张建华 | Mutual calibration angle gauge and measuring method thereof |
| US5982479A (en) * | 1997-02-14 | 1999-11-09 | Medar, Inc. | Method for calibrating a tilt inspection system and reference disk assembly for use therein |
| PL219399B1 (en) * | 2011-12-27 | 2015-04-30 | Politechnika Białostocka | Device for non-contact measurement of elongation and the angle of torsion of structural elements |
| CN202869443U (en) * | 2012-09-29 | 2013-04-10 | 无锡市政设计研究院有限公司 | Integrated displacement and rotation angle sensor with fiber Bragg gratings |
| CN204373621U (en) * | 2015-01-08 | 2015-06-03 | 佛山轻子精密测控技术有限公司 | A kind of Novel angle displacement measuring device |
| CN109632252A (en) * | 2018-12-27 | 2019-04-16 | 中国航天空气动力技术研究院 | The vibration angle displacement measuring device and method of outer formula forced vibration dynamic derivative test |
| CN110307789A (en) * | 2019-07-19 | 2019-10-08 | 哈尔滨工业大学 | One kind being based on maglev float circumferential direction angular displacement controllable device |
Non-Patent Citations (2)
| Title |
|---|
| 王治衡: "《神奇的数学曲线》", 31 December 2011 * |
| 金正国编: "《大学预科教学》", 31 August 2011 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904361A (en) * | 2020-12-10 | 2021-06-04 | 成都飞机工业（集团）有限责任公司 | Engine thrust line accurate measurement method based on laser scanning |
| CN113701608A (en) * | 2021-07-29 | 2021-11-26 | 东风汽车零部件(集团)有限公司刃量具分公司 | Gear timing angle checking fixture |
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