CN103322920A - Measuring method for expanding measuring range of laser displacement sensor - Google Patents
Measuring method for expanding measuring range of laser displacement sensor Download PDFInfo
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- CN103322920A CN103322920A CN2013102134400A CN201310213440A CN103322920A CN 103322920 A CN103322920 A CN 103322920A CN 2013102134400 A CN2013102134400 A CN 2013102134400A CN 201310213440 A CN201310213440 A CN 201310213440A CN 103322920 A CN103322920 A CN 103322920A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 76
- 230000005693 optoelectronics Effects 0.000 claims abstract description 15
- 238000005259 measurement Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 238000010998 test method Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
Provided is a measuring method for expanding the measuring range of a laser displacement sensor. Light-sensitive surfaces of the laser displacement sensor are arranged on two equal sides of an isosceles triangle for test; the range of linear displacement of an object to be tested is less than or equal to L, and the measuring range of the laser displacement sensor is S'; the isosceles triangle for test is mounted on the object to be tested; the base side of the isosceles triangle for test is parallel to the motion trail of the object to be tested; the laser displacement sensor is fixed above the isosceles triangle for test and is fixed in the middle position within the moving range of the isosceles triangle for test; the measuring direction of the laser displacement sensor is perpendicular to the base side of the isosceles triangle for test; the distance between the laser displacement sensor and the base side of the isosceles triangle for test is S which is less than or equal to the S'; the laser displacement sensor can accurately measure the height H from a test point to the sloping side of the isosceles triangle for test; an optoelectronic switch is mounted at the position which is a half of the L away from the motion starting point of the object to be tested. The measuring method for expanding the measuring range of the laser displacement sensor is simple in structure, accurate in result, fast in response speed and wide in testing range.
Description
Technical field
The present invention relates to the laser displacement sensor technology, especially a kind of measuring method of expansion of laser light displacement transducer range.
Background technology
Laser displacement sensor is the variation such as position, displacement of non-cpntact measurement testee accurately, and advantages such as laser displacement sensor is good with its linearity, response time weak point, high-frequency, high precision are widely used in every field.
Laser displacement sensor is also different because of different its measurement ranges of model, when exceeding the range of current laser displacement sensor, then can't measure measured body, must change the higher laser displacement sensor of range, but the laser displacement sensor price is higher relatively, then can cause great waste.On the other hand, when needs are surveyed two kinds of different displacements with same laser displacement sensor, need to adopt wide range to meet the demands simultaneously, when still surveying little displacement with the laser displacement sensor of wide range, resolution is low, low precision.
Summary of the invention
In order to solve laser displacement sensor relatively poor problem of range applicability when measuring ohject displacement, the invention provides the measuring method of the stronger expansion of laser light displacement transducer range of a kind of applicability.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of measuring method of expansion of laser light displacement transducer range, the proving installation of realizing this method of testing comprises test isosceles triangle device, described test is L with isosceles triangle device bottom side length, highly be S, the angle on waist and base is β, and described test is with on the isosceles triangle two waist limits laser displacement sensor light-sensitive surface being arranged;
The scope of object under test straight-line displacement is smaller or equal to L, described laser displacement sensor range is S', described test is installed on the object under test with isosceles triangle, described test is parallel with the object under test movement locus with the isosceles triangle base, described laser displacement sensor is fixed on the top that isosceles triangle is used in test, described laser displacement sensor is fixed on test and uses the interior centre position of isosceles triangle moving range, described laser displacement sensor direction of measurement is perpendicular to the base of test with isosceles triangle, described laser displacement sensor distance test is S and S≤S' with the height on isosceles triangle base, described laser displacement sensor can accurately measure test point to the height H between the isosceles triangle hypotenuse, described optoelectronic switch is installed in the 1/2L place apart from object under test motion starting point, described optoelectronic switch basis has the exportable positive negative value of no signal, and is specific as follows:
(1) when optoelectronic switch has signal, the displacement D=(S-H of object under test)/tan β.
(2) when the optoelectronic switch no signal, the displacement D=L-(S-H of object under test)/tan β.
Mentality of designing of the present invention: utilize a known angle and the right-angle triangle of short right-angle side length can accurately calculate the principle of its long right-angle side, thereby employing has laser displacement sensor to measure the length that short right-angle side length calculates long right-angle side, thereby increased the measurement range of laser displacement sensor, in the middle of the test, only need to an auxiliary triangle of using is installed on the object under test, the angle of long right-angle side and hypotenuse is known, short right-angle side is the range value of laser displacement sensor, long right-angle side is the shift value of object under test, the intersection point of long right-angle side and hypotenuse is the test starting point, described auxiliaryly move with object under test with triangle, can accurately measure laser displacement sensor apart from the vertical height of hypotenuse by laser displacement sensor, deduct the laser displacement sensor measured value with the short right angle of triangle boundary values and can obtain the current location base apart from the height value of hypotenuse with auxiliary again, can calculate the auxiliary leg-of-mutton displacement of using according to Pythagorean theorem.
Machinery is installed for convenience, to assist with triangular design is isosceles triangle, it is identical to be positioned at two hypotenuse measured values for fear of laser displacement sensor in the test process, be used as sign bit by optoelectronic switch, have or not reflected signal can judge that current laser displacement sensor is positioned at left side or the right side of testing with isosceles triangle, calculates the displacement of object under test again according to measuring principle according to installation situation and optoelectronic switch.
Beneficial effect of the present invention is: simple in structure, the result is accurate, response speed is fast, test specification is wide.
Description of drawings
Fig. 1 is the isosceles triangle synoptic diagram of using to be tested.
Fig. 2 is measuring principle figure.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
See figures.1.and.2, a kind of measuring method of expansion of laser light displacement transducer range, the proving installation of realizing this method of testing comprises test isosceles triangle 1, described test is L with isosceles triangle device bottom side length, highly be S, the angle on waist and base is β, and described test is with on 1 liang of waist limit of isosceles triangle the laser displacement sensor light-sensitive surface being arranged;
The scope of described object under test straight-line displacement is smaller or equal to L, and described laser displacement sensor range is S'.Described test is installed on the object under test with isosceles triangle 1, described test is parallel with the object under test movement locus with isosceles triangle 1 base, as shown in Figure 2, described test moves to C point with object under test from the B point with isosceles triangle, described laser displacement sensor is fixed on the top that isosceles triangle 1 is used in test, it is the A point with the centre position in isosceles triangle 1 moving range that described laser displacement sensor is fixed on test, described laser displacement sensor direction of measurement is perpendicular to the base of test with isosceles triangle 1, described laser displacement sensor distance test is S with the height on isosceles triangle base, S≤S';
In the object under test motion process, described laser displacement sensor can accurately measure test point to the height H between the isosceles triangle hypotenuse, laser displacement sensor deducts H apart from the height S on base and namely obtains testing with the vertical height h of isosceles triangle base apart from waist, i.e. h=S-H; Move to from the B point the process that A orders at object under test, object under test displacement D, h and test are formed a right-angle triangle with the isosceles triangle hypotenuse, so D=h/tan β, i.e. D=(S-H)/tan β; Move to from the A point the process that C orders at object under test, the object under test displacement is L-h/tan β, be D=L-(S-H)/tan β, the 1/2L place that described optoelectronic switch is installed in apart from object under test motion starting point is the D point, described optoelectronic switch is according to the exportable positive negative value of no signal is arranged.When optoelectronic switch has signal, the displacement D=(S-H of object under test)/tan β; When the optoelectronic switch no signal, the displacement D=L-(S-H of object under test)/tan β.
Claims (1)
1. the measuring method of an expansion of laser light displacement transducer range, it is characterized in that: the proving installation of realizing this method of testing comprises test isosceles triangle device, described test is L with isosceles triangle device bottom side length, highly be S, the angle on waist and base is β, and described test is with on the isosceles triangle two waist limits laser displacement sensor light-sensitive surface being arranged;
The scope of object under test straight-line displacement is smaller or equal to L, described laser displacement sensor range is S', described test is installed on the object under test with isosceles triangle, described test is parallel with the object under test movement locus with the isosceles triangle base, described laser displacement sensor is fixed on the top that isosceles triangle is used in test, described laser displacement sensor is fixed on test and uses the interior centre position of isosceles triangle moving range, described laser displacement sensor direction of measurement is perpendicular to the base of test with isosceles triangle, described laser displacement sensor distance test is S and S≤S' with the height on isosceles triangle base, described laser displacement sensor can accurately measure test point to the height H between the isosceles triangle hypotenuse, described optoelectronic switch is installed in the 1/2L place apart from object under test motion starting point, described optoelectronic switch basis has the exportable positive negative value of no signal, and is specific as follows:
(1) when optoelectronic switch has signal, the displacement D=(S-H of object under test)/tan β.
(2) when the optoelectronic switch no signal, the displacement D=L-(S-H of object under test)/tan β.
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| CN201310213440.0A CN103322920B (en) | 2013-05-31 | 2013-05-31 | A kind of measuring method of expansion of laser light displacement sensor measurement range |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106441112A (en) * | 2016-11-04 | 2017-02-22 | 杭州电子科技大学 | Range-variable laser trigonometry displacement measuring device and method |
| CN110398203A (en) * | 2019-08-14 | 2019-11-01 | 东风设备制造有限公司 | Long range laser length measurement method and device |
| CN111215771A (en) * | 2020-03-04 | 2020-06-02 | 北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所） | Laser processing device and processing method |
| CN112946673A (en) * | 2021-01-29 | 2021-06-11 | 上海睿钰生物科技有限公司 | Laser ranging method, focusing method, laser ranging system and focusing system |
| CN114151136A (en) * | 2021-11-04 | 2022-03-08 | 天地（常州）自动化股份有限公司 | Personnel protection method of reversed loader |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441112A (en) * | 2016-11-04 | 2017-02-22 | 杭州电子科技大学 | Range-variable laser trigonometry displacement measuring device and method |
| CN106441112B (en) * | 2016-11-04 | 2017-08-15 | 杭州电子科技大学 | A kind of Tilt In The Laser Triangulation Disp, Lacement apparatus and method of changeable fluid |
| CN110398203A (en) * | 2019-08-14 | 2019-11-01 | 东风设备制造有限公司 | Long range laser length measurement method and device |
| CN111215771A (en) * | 2020-03-04 | 2020-06-02 | 北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所） | Laser processing device and processing method |
| CN112946673A (en) * | 2021-01-29 | 2021-06-11 | 上海睿钰生物科技有限公司 | Laser ranging method, focusing method, laser ranging system and focusing system |
| CN114151136A (en) * | 2021-11-04 | 2022-03-08 | 天地（常州）自动化股份有限公司 | Personnel protection method of reversed loader |
| CN114151136B (en) * | 2021-11-04 | 2024-02-20 | 天地（常州）自动化股份有限公司 | Personnel protection method of reversed loader |
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| CN103322920B (en) | 2016-03-30 |
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Address after: No.58, Humen Tuanjie Road, Humen Town, Dongguan City, Guangdong Province 523000 Patentee after: Shendawei Technology (Guangdong) Co.,Ltd. Address before: No.58, Humen Tuanjie Road, Humen Town, Dongguan City, Guangdong Province 523000 Patentee before: DONG GUAN SNDWAY CO.,LTD. |