CN102043154A - Laser distance measuring instrument - Google Patents
Laser distance measuring instrument Download PDFInfo
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- CN102043154A CN102043154A CN2010105651744A CN201010565174A CN102043154A CN 102043154 A CN102043154 A CN 102043154A CN 2010105651744 A CN2010105651744 A CN 2010105651744A CN 201010565174 A CN201010565174 A CN 201010565174A CN 102043154 A CN102043154 A CN 102043154A
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- primary processor
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Abstract
The invention discloses a laser distance measuring instrument which comprises a distance measuring instrument shell, wherein the distance measuring instrument shell internally comprises a main processor, a frequency generator, a laser emitter, a local vibration generator and an avalanche photodiode; the main processor is internally provided with an internal memory; the main processor sends out a signal, and after being subjected to modulation and power amplification through the frequency generator, the signal is transmitted to the laser emitter; the laser emitter is used for emitting out a laser beam, after arriving at the reverse side of a measured object, and the laser beam is reflected to form a reflected laser beam; a local vibration signal generated by the local vibration generator and the reflected laser beam are mixed in the avalanche photodiode, and then a low-frequency measurement signal is generated and transmitted to the main processor; the part close to the emitting end of a laser reflector is provided with a motor; and a reflector capable of rotating is connected to the motor. The instrument has the advantages of saving the manufacturing cost and reducing the manufacturing technical difficulty.
Description
Technical field:
The present invention relates to a kind of laser ranging system, especially a kind of laser range finder with correcting measuring error device.
Background technology:
Laser range finder is because of measuring accuracy height, the fields such as building, indoor decoration that are widely used in easy to use.General laser ranging system selects for use avalanche photodide to be used as receiving the reception components and parts of folded light beam mostly.Avalanche photodide is because of its intrinsic electrical specification, when change of external conditions, such as temperature, when light intensity changes, can produce electrical quantity and change, and such as the variation of multiplication factor, phase place, thereby causes the reduction of measuring accuracy.Simultaneously, the aging reduction that waits other reasons also can cause measuring accuracy of circuit.For this reason, the research and development relative measures is arranged all both at home and abroad, reduce this measuring error.Traditional way increases calibrating installation exactly, mainly contain following several form at present: as shown in Figure 1: utilize reflecting optics, with a part launch light by the machine internal fixation apart from back reflection in another set of avalanche photodide receiving system, measurement data and fixed range relatively after, generate corrected parameter, revise the measurement data of tested distance again with this parameter, thereby improve measuring accuracy.As shown in Figure 2: the error signal that will produce because of avalanche photodide and circuit is launched with laser after ovennodulation, after being received by avalanche photodide, when mixing and intrinsic error signal offset, thereby improve precision.
Summary of the invention:
The objective of the invention is in order to overcome above deficiency, a kind of a kind of laser range finder of saving manufacturing cost, reducing the manufacturing technology difficulty is provided.
Purpose of the present invention is achieved through the following technical solutions: a kind of laser range finder, comprise the stadimeter shell, comprise primary processor in the stadimeter shell, frequency generator, the laser radiation device, local oscillator generator, avalanche photodide, the inside of primary processor is provided with internal storage, primary processor sends signal, signal is modulated through frequency generator, pass to the laser radiation device after the power amplification, the laser reflector outgoing laser beam, laser beam arrives the reflecting surface back reflection of testee and returns, the light beam that reflects is a reflection lasering beam, local oscillation signal that local oscillator generator produces and reflection lasering beam produce a low frequency measurement signal after the mixing in avalanche photodide, the low frequency measurement signal is passed described primary processor back, ejecting end place near laser reflector is provided with motor, is connected with rotatable reflector on the motor.
The present invention compared with prior art has the following advantages:
The present invention utilizes reflector of driven by motor, changes the light path of emission light beam in instrument internal, behind fixed range, makes beam reflection in the avalanche photodide receiving system, measurement data and fixed range relatively after, generate corrected parameter.After reflector recovered, the emission light beam was directly got to testee, generates measurement data in same set of avalanche photodide receiving system, revises this measurement data with corrected parameter again, thereby improved measuring accuracy.
Description of drawings:
Fig. 1 is the structure principle chart with laser range finder of reflecting optics;
Fig. 2 is the structure principle chart with laser range finder of mixer device;
Structure principle chart when Fig. 3 calibrates for the present invention;
Structure principle chart when Fig. 4 surveys for the present invention;
Number in the figure: 1-stadimeter shell, 2-primary processor, 3-internal storage, 4-frequency generator, 5-laser radiation device, 6-local oscillator generator, 7-avalanche photodide, 8-motor, 9-reflector, 10-testee.
Embodiment:
In order to deepen the understanding of the present invention, the invention will be further described below in conjunction with embodiment and accompanying drawing, and this embodiment only is used to explain the present invention, does not constitute the qualification to protection domain of the present invention.
Show a kind of embodiment of a kind of laser range finder of the present invention as Fig. 3 and Fig. 4, comprise stadimeter shell 1, comprise primary processor 2 in the stadimeter shell 1, frequency generator 4, laser radiation device 5, local oscillator generator 6, avalanche photodide 7, the inside of primary processor 2 is provided with internal storage 3, primary processor 2 sends signal, signal is through frequency generator 4 modulation, pass to laser radiation device 5 after the power amplification, laser reflector 5 outgoing laser beams, laser beam arrives the reflecting surface back reflection of testee 11 and returns, the light beam that reflects is a reflection lasering beam, local oscillation signal that local oscillator generator 6 produces and reflection lasering beam produce a low frequency measurement signal after the mixing in avalanche photodide 7, the low frequency measurement signal is passed primary processor 2 back, ejecting end place near laser reflector 5 is provided with motor 8, is connected with rotatable reflector 9 on the motor 8.
The present invention utilizes motor 8 to drive a reflector 9, changes the light path of emission light beam in instrument internal, behind fixed range, makes beam reflection in avalanche photodide 7 receiving systems, measurement data and fixed range relatively after, generate corrected parameter.After reflector 9 recovered, the emission light beam was directly got to testee 10, generates measurement data in same set of avalanche photodide 7 receiving systems, revises this measurement data with corrected parameter again, thereby improved measuring accuracy.
Claims (1)
1. laser range finder, comprise stadimeter shell (1), comprise primary processor (2) in the described stadimeter shell (1), frequency generator (4), laser radiation device (5), local oscillator generator (6), avalanche photodide (7), the inside of described primary processor (2) is provided with internal storage (3), described primary processor (2) sends signal, signal is modulated through described frequency generator (4), pass to described laser radiation device (5) after the power amplification, described laser reflector (5) outgoing laser beam, laser beam arrives the reflecting surface back reflection of testee (11) and returns, the light beam that reflects is a reflection lasering beam, local oscillation signal that described local oscillator generator (6) produces and reflection lasering beam produce a low frequency measurement signal after the mixing in described avalanche photodide (7), the low frequency measurement signal is passed described primary processor (2) back, it is characterized in that: the ejecting end place near described laser reflector (5) is provided with motor (8), is connected with rotatable reflector (9) on the described motor (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105651744A CN102043154A (en) | 2010-11-29 | 2010-11-29 | Laser distance measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105651744A CN102043154A (en) | 2010-11-29 | 2010-11-29 | Laser distance measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102043154A true CN102043154A (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105651744A Pending CN102043154A (en) | 2010-11-29 | 2010-11-29 | Laser distance measuring instrument |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013067711A1 (en) * | 2011-11-11 | 2013-05-16 | 深圳市迈测科技有限公司 | Distance measurement method and system |
| CN103226200A (en) * | 2013-03-22 | 2013-07-31 | 浙江理工大学 | Handheld laser ranging device |
| CN103941262A (en) * | 2014-04-01 | 2014-07-23 | 中国科学院合肥物质科学研究院 | Pulse laser distance-measurement device and pulse laser distance-measurement method using same |
| CN115061147A (en) * | 2022-08-16 | 2022-09-16 | 中交天津港湾工程研究院有限公司 | Underwater laser ranging device for turbid water area |
-
2010
- 2010-11-29 CN CN2010105651744A patent/CN102043154A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013067711A1 (en) * | 2011-11-11 | 2013-05-16 | 深圳市迈测科技有限公司 | Distance measurement method and system |
| CN103226200A (en) * | 2013-03-22 | 2013-07-31 | 浙江理工大学 | Handheld laser ranging device |
| CN103941262A (en) * | 2014-04-01 | 2014-07-23 | 中国科学院合肥物质科学研究院 | Pulse laser distance-measurement device and pulse laser distance-measurement method using same |
| CN115061147A (en) * | 2022-08-16 | 2022-09-16 | 中交天津港湾工程研究院有限公司 | Underwater laser ranging device for turbid water area |
| CN115061147B (en) * | 2022-08-16 | 2023-01-20 | 中交天津港湾工程研究院有限公司 | Underwater laser ranging device for turbid water area |
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Application publication date: 20110504 |