CN1782664A - Laser position judging system and method - Google Patents
Laser position judging system and method Download PDFInfo
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- CN1782664A CN1782664A CN 200410097766 CN200410097766A CN1782664A CN 1782664 A CN1782664 A CN 1782664A CN 200410097766 CN200410097766 CN 200410097766 CN 200410097766 A CN200410097766 A CN 200410097766A CN 1782664 A CN1782664 A CN 1782664A
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Abstract
The present invention provides a kind of laser position judging system and method for judging laser irradiation position. The system includes a photosensitive unit with photodiode to convert received laser beam into electric signal; a signal amplifier unit to amplify electric signal; a signal rectifying unit to convert the rectified signal into positive output signal; a voltage comparison unit with one input end connected to the output of the signal rectifying unit and one other reference voltage input end; and a judging response unit including a responder to the output signal of the voltage comparison unit. When the output signal of the voltage comparison unit is high level, the responder responses to represent sensed laser and two sensing points are found out successively to find the connection line as the horizontal laser position. The present invention completes laser position judgment with photodiodes and simple circuit, and is simple, feasible, low in cost and high in precision.
Description
[technical field]
The present invention relates to a kind of laser detection system, refer to a kind of system and method for judging the irradiation position of the laser that laser beam emitting device sends especially.
[background technology]
In engineering fields such as building, assembling and positioning calibration, mechanical machine tool track calibration, need utilize laser to do horizontal line, perpendicular line or level of corrections face usually.Laser often is applied in these two kinds of optical devices of laser leveler and laser range finder according to its concrete purposes.All be provided with laser beam emitting device on above-mentioned two kinds of optical devices, it no matter is the position of the laser that sent for the exploring laser light level meter or for measuring the detection range of laser range finder, in actual applications, all be to send laser, and judge the irradiation position of laser through artificial or optical device by laser beam emitting device.For the judgement of laser position, early the method that adopts is a manual method, promptly utilizes the laser observer to estimate.This method must be estimated by the operator, not only increase human cost, and operator's operating experience is had relatively high expectations, a prior drawback is when laser range is far away, people's naked eyes can't be seen the position of light beam clearly at all, thereby make judged result inaccurate.Therefore, this traditional laser position determination methods range of application is very limited, and it can not be used for remote detection, can not be used for the measurement that degree of accuracy is had relatively high expectations.
Afterwards, the research staff developed all kinds of optical sensing systems that use with the laser beam emitting device collocation again, utilizes a large amount of optical modules to receive laser, and the light position is accurately judged.The Taiwan patent announcement has promptly disclosed a kind of laser sensing system No. 365560, and it utilizes optical modules such as spectroscope, leaded light mirror decay laser, and makes 1% of luminous energy after the decay reflex to light sensing apparatus.Light sensing apparatus includes copper disk, focus lamp and high-speed light sensor.The slit that one retrofit (wide about 1mm) arranged on the copper disk, allow a fraction of laser energy line focus mirror to reach OPTICAL SENSORS, this laser energy convert through OPTICAL SENSORS that electric signal amplifies to and digitizing after, collect and with the position of personal computer analytical calculation laser with data collecting card.Though this method can compare accurate position judgment to high power laser light, but because of it has used the optical module of a large amount of precisions and the assistant analysis of computing machine, thereby make this laser sensing system bulky, use inconvenience, cost higher, be not suitable for promoting the use of.
In view of the foregoing, the invention provides the laser position judging system that a kind of volume is little, cost is low, degree of accuracy is high and easy to use, and a kind of simple laser position determination methods.
[summary of the invention]
The object of the present invention is to provide a kind of determination methods simple, and have the laser position judging system and a method of low-cost and pinpoint accuracy characteristics, it can judge the particular location of the laser radiation that laser beam emitting device sends, and also can judge the horizontal level of laser radiation accurately.
For achieving the above object, the present invention adopts following technical scheme: laser position judging system of the present invention comprises the photosensitive unit that is used to receive laser, and it can convert the laser that receives to electric signal output; The signal amplification unit that is connected with photosensitive unit is used for input electric signal is wherein amplified; The signal rectification unit that is connected with signal amplification unit is the output of unidirectional voltage signal with input conversion of signals wherein; Voltage comparison unit comprises two input ends and an output terminal, and one of them input end links to each other with signal rectification unit, and another input end is imported predefined reference voltage, and the signal comparison of two input ends is after signal is judged in output terminal output; And the judgement response unit, comprise the responding device of being judged that signal drives.
Laser position determination methods of the present invention comprises the steps: that two groups of photoreceptors are subjected to laser radiation respectively and produce electric current; Two groups of electric currents are inputed to signal amplification unit and signal rectification unit successively carry out electricity and handle, obtain the forward voltage signal of two groups of specific enlargement factors; Two groups of forward voltage signal difference input voltage comparing units compare with the reference voltage that produces through electric resistance partial pressure in advance, and greater than reference voltage, then voltage comparison unit is exported high level as if applied signal voltage, otherwise, output low level; The judgement display unit is made response under high level drives, thereby can judge that this system senses laser, notes the position of this sensitivity speck; Repeat said process, find the position of second sensitivity speck, can draw the horizontal level of laser again according to the principle that two points make a line.
Compared with prior art, the optical module that laser position judging system of the present invention and method are used is few, and the follow-up treatment circuit of sensitization is simple, and deterministic process is simple, is convenient to realize, and has reduced system cost widely.
[description of drawings]
Fig. 1 is the composition configuration diagram of laser position judging system of the present invention.
Fig. 2 is the circuit diagram of the photosensitive unit of laser position judging system of the present invention.
Fig. 3 is the signal amplification unit of laser position judging system of the present invention and the circuit diagram of signal rectification unit.
Fig. 4 is the circuit diagram of the voltage comparison unit of laser position judging system of the present invention.
Fig. 5 is the outside drawing of laser position judging system of the present invention.
[embodiment]
Please refer to shown in Figure 1ly, laser position judging system 1 of the present invention mainly comprises photosensitive unit 10, two signal amplification units 20, two signal rectification unit 30, two voltage comparison units 40 and judges display unit 50.
Please refer to Fig. 2 and shown in Figure 5, photosensitive unit 10 is used for the laser that sensing laser beam emitting device (not shown) is sent, it mainly comprises four arranged side by side and photodiodes 101,102,103 and 104 that closely discharge, wherein two photodiodes 101 are in parallel with 102 as first photoreceptor 110, and two other photodiode 103 is in parallel with 104 as second photoreceptor 120.The sensitive surface of first photoreceptor 110 is used to accept the irradiation of lasing light emitter (not shown), thereby receives laser, and electrically connects with first resistance 105.The sensitive surface of second photoreceptor 120 is used to accept the irradiation of lasing light emitter (not shown), thereby receives laser, and electrically connects with second resistance 106.In the present embodiment, the resistance of first resistance 105 and second resistance 106 is 1.2 kilohms.Usually, the optical maser wavelength that laser beam emitting device sent is 635 nanometers, so laser position judging system 1 of the present invention also is provided with optical filter 504 between the sensitive surface of photodiode 101,102,103 and 104 and incident laser, be used for the light of other unnecessary wave band of filtering.When laser is radiated on photodiode 101,102,103 and 104 by optical filter 504, photodiode 101,102,103 and 104 is understood the photocurrent that produces varying strength according to the intensity of the laser that senses separately, thereby distinguishes output current I at the output terminal of first photoreceptor 110 and second photoreceptor 120
10And I
20If a certain photodiode does not sense laser in the photodiode 101,102,103 and 104, then it can not produce photocurrent, thereby will can output current on the parallel branch at its place.Above-mentioned electric current I
10And I
20In circuit, convert voltage signal U to via first resistance 105 and second resistance 106 respectively
10And U
20 First photoreceptor 110 and signal amplification unit 20, signal rectification unit 30, voltage comparison unit 40 and display unit 50 are formed first circuit, and second photoreceptor 120 is formed second circuits with another signal amplification unit 20, another signal rectification unit 30, another voltage comparison unit 40 and display unit 50.
Voltage signal U
10And U
20Respectively via first circuit and second circuit input signal amplification unit 20 correspondingly.Because the internal circuit configuration of two signal amplification units 20 is identical on first circuit and the second circuit, so to locate be that example describes with the signal amplification unit on first circuit 20 only.
Please refer to shown in Figure 3ly, signal amplification unit 20 mainly comprises operational amplifier 21 and the capacitance 22 that links to each other with the negative signal input end of operational amplifier 21.Because photodiode 101 and 102 also can receive natural light when receiving laser, and natural light intensity remains unchanged within a certain period of time substantially, therefore, electric current I
10In receive the alternating component that laser produced except including, also include and receive the flip-flop that natural light produced, thereby make in the voltage signal that inputs to signal amplification unit 20 dc noise is arranged.The effect of capacitance 22 is exactly the filtering dc noise, only makes the alternating component signal input to operational amplifier 21.Voltage signal U after operational amplifier 21 amplifies
11Import corresponding signal rectification unit 30.U
11It is the alternating voltage signal.In the present embodiment, operational amplifier 21 adopts LMC660.The enlargement factor of operational amplifier 21 is by resistance 210 and 211 decisions, and the resistance that changes resistance 210 and 211 can be adjusted the enlargement factor of operational amplifier 21.Signal after 212 pairs of amplifications of electric capacity has attenuation, so that filtering noise makes output signal more stable.
Each signal rectification unit 30 includes the diode 31 and the direct earth capacitance 32 of forward conduction.Be that example describes equally, only with the signal rectification unit on first circuit 30.Because 31 of diodes end old friend's time variant voltage signal U to reverse voltage to the forward voltage turn-on
11Voltage signal U through signal rectification unit 30 back outputs
12Be the forward voltage signal.
Voltage U by rectification unit 30 outputs
12Input voltage comparing unit 40 compares.Please refer to shown in Figure 4ly, each voltage comparison unit 40 includes two input ends and an output terminal 43.Two input ends are respectively signal input part 41 to be compared and reference voltage input terminal 42.First circuit is identical with voltage comparison unit internal circuit configuration on the second circuit, so to locate be that example describes with the voltage comparison unit on first circuit 40 only.Voltage U
12By 40, one pre-set reference voltage U of signal input part 41 input voltage comparing units to be compared
rBy reference voltage input terminal 42 input voltage comparing units 40, reference voltage U
rCan produce by the specific electrical resistance dividing potential drop.Reference voltage U
rThe selection of size will guarantee to need only first photoreceptor 110 and sense laser, then the electric current I of its generation
10After signal amplification unit 20 on first resistance 105, first circuit and 30 processing of the signal rectification unit on first circuit, the voltage that enters voltage comparison unit 40 is bound to greater than reference voltage U
r, the voltage of other noise generation then necessarily is lower than reference voltage U simultaneously
rSignal by output terminal 43 outputs is the first judgement signal (not shown), when voltage U to be compared
12Greater than reference voltage U
rThe time, first judges that voltage of signals is first level (high level or a low level).Otherwise, when voltage U to be compared
12Less than reference voltage U
rThe time, first judges that voltage of signals is second level (low level or a high level).
Processing procedure for second photoreceptor 120 is similar to the above.Second photoreceptor, 120 sensing laser and through the output voltage behind second resistance 106, through signal amplification unit 20, signal rectification unit 30 and the voltage comparison unit 40 on the second circuit, output high level or low level second is judged signal (not shown).For simplicity, in the following description, first level and second level replace with high level and low level respectively, and vice versa.
Please refer to shown in Figure 5, judge that display unit 50 comprises that first display device 501 that is connected with the first judgement signal is (as LCDs, LED), second display device 502 that is connected with the second judgement signal is (as LCDs, LED), and judge that with first, second main display device 503 that signal all is communicated with is (as LCDs, LED).Above-mentioned first and second display device 501,502 and main display device 503 drive by high level.By the foregoing circuit analytic process as can be known, when first photoreceptor 110 senses laser, and second photoreceptor 120 is not when sensing laser, and first judges that signal is a high level, second judges that signal is a low level, thereby only can drive first display device 501 and make it luminous.In like manner, when second photoreceptor 120 senses laser, and first photoreceptor is not when sensing laser, and first judges that signal is a low level, and second judges that signal is a high level, thereby only can drive second display device 502 and make it luminous.When laser radiation during in photodiode 102 and 103 middles, 110, the 120 equal sensitization of first and second photoreceptors, first and second judge that signals are high level, and this moment, the master of system display device 503 will be luminous, and laser is found in expression.When laser did not shine on any photodiode, first and second judged that signal is low level, and then first and second display device 501,502 all can be not luminous, and main display device 503 can be not luminous yet, and the expression system does not find laser.For whether better expression senses laser, can also be at hummer of main display device 503 next doors polyphone, then hummer sounds when main display device 503 is luminous.Listed under the different sensitization situations of first and second photoreceptors 110,120 several situations that first, second display device 501,502, main display device 503 and hummer also can occur in the following table:
| First judges signal | Second judges signal | Accordingly result |
| Low level | Low level | No display device lights, and hummer does not ring |
| Low level | High level | Second display device lights, and hummer does not ring |
| High level | Low level | First display device lights, and hummer does not ring |
| High level | High level | Main display device lights, and hummer sounds |
In addition, also be provided with horizontal alignment device (as the leveling bubble instrument) 505 in the laser position judging system 1 of the present invention, before sensing laser, can itself and laser beam emitting device be positioned on the same surface level for adjusting laser position judging system 1.Also offer scale groove 506 on the laser position judging system 1, when main display device 503 lights, the user can note the position of first sensitivity speck in scale groove 506, then mobile laser position judging system 1, when treating that above-mentioned main display device 503 lights once again, note the position of second sensitivity speck, then, can draw the horizontal level at laser place according to 2 principles in line.
From above-mentioned analysis as can be known, laser position determination methods of the present invention utilizes 1 pair of laser position of above-mentioned laser position judging system to judge, this method comprises the steps: the first step, provide horizontal alignment device 505,506, two photoreceptors of scale groove 110,120, two resistance 105,106,30, two voltage comparison units of 20, two signal rectification unit of two signal amplification units 40 and judgement display unit 50; In second step, the adjustment level makes laser position judging system 1 be in horizontality than standard apparatus 505; In the 3rd step, two photoreceptors 110,120 are sensing laser and produce electric current I respectively
10, I
20The 4th step, electric current I
10, I
20Convert voltage signal U to through resistance 105,106 respectively
10, U
20And input to corresponding signal amplification unit 20 respectively; The 5th step, 20 pairs of inputs of each signal amplification unit voltage signal U wherein
10Or U
20Amplify and export corresponding signal rectification unit 30 to; In the 6th step, the conversion of signals that each signal rectification unit 30 will be imported wherein becomes the forward voltage signal and exports correspondent voltage comparing unit 40 to; The 7th step, 40 pairs of inputs of each voltage comparison unit forward voltage signal wherein and another input predefined reference voltage U wherein
rCompare, when forward voltage voltage of signals during greater than reference voltage, the judgement signal of one first level of voltage comparison unit 40 outputs, when forward voltage voltage of signals during less than reference voltage, the judgement signal of one second level of voltage comparison unit 40 outputs, and should judge that signal exported judgement display unit 50 to; The 8th step, judge that display unit 50 provides main response device 503, main response device 503 is made response under first level signal drives, can't make response under second level signal drives, if responding device 503 is made response, then finds sensitivity speck; The 9th goes on foot, and notes the position of this sensitivity speck (first sensitivity speck) by scale groove 506; In the tenth step, mobile laser position judging system 1, and repeat above-mentioned steps one to step 8 is noted the position of this sensitivity speck (second sensitivity speck) by scale groove 506, thereby connects first sensitivity speck and second sensitivity speck draws the horizontal level at laser place.
Claims (31)
1. laser position judging system comprises: be used to receive the photosensitive unit of incident laser, it can convert the laser that receives to electric signal output; The signal amplification unit that is connected with photosensitive unit is used for input electric signal is wherein amplified; It is characterized in that: described laser position judging system also comprises the signal rectification unit that is connected with signal amplification unit, and input conversion of signals wherein is the output of unidirectional voltage signal; Voltage comparison unit comprises two input ends and an output terminal, and one of them input end links to each other with signal rectification unit, and another input end is imported predefined reference signal, and the signal comparison of two input ends is after signal is judged in output terminal output; And the judgement response unit, comprise the responding device of being judged that signal drives.
2. laser position judging system as claimed in claim 1, it is characterized in that: described photosensitive unit comprises by several photodiodes and making up mutually and a plurality of photoreceptors of constituting, after photodiode receives laser, be that unit externally exports electric signal with the photoreceptor.
3. laser position judging system as claimed in claim 2 is characterized in that: the electric signal of each photoreceptor output all can be by input signal amplifying unit behind the voltage conversion device.
4. laser position judging system as claimed in claim 2 is characterized in that: described several photodiodes discharge side by side and closely.
5. laser position judging system as claimed in claim 2, it is characterized in that: described photosensitive unit comprises two photoreceptors, each photoreceptor is formed in parallel by two photodiodes, form photocurrent after each photodiode sensitization, and the total current after the two photocurrent parallel connections is as the output current of this photoreceptor.
6. as claim 1 or 5 described laser position judging systems, it is characterized in that: described signal amplification unit comprises operational amplifier and the capacitance that links to each other with the operational amplifier signal input part, and this isolation capacitance is used for the filtering photosensitive unit output flip-flop that electric signal comprised.
7. as claim 1 or 5 described laser position judging systems, it is characterized in that: described signal rectification unit comprises the diode of forward conduction and with the electric capacity of diode ground connection.
8. laser position judging system as claimed in claim 1, it is characterized in that: the selection of described reference voltage need guarantee if photosensitive unit senses arrives laser, the voltage that inputs to voltage comparison unit after electric signal process signal amplification unit that then it produced and the signal rectification unit is greater than reference voltage, thereby the assurance voltage comparison unit is output as first current potential.
9. laser position judging system as claimed in claim 1 is characterized in that: this system comprises multiplex circuit, is equipped with signal amplification unit, signal rectification unit, voltage comparison unit and responding device on the circuit of every road.
10. laser position judging system as claimed in claim 9 is characterized in that: described responding device also comprise with each circuit in the main response device that all links to each other of the output terminal of voltage comparison unit.
11. as claim 1 or 4 or 5 described laser position judging systems, it is characterized in that: be provided with optical filter between described photosensitive unit and the laser, be used for the light of the unnecessary wave band of filtering.
12. laser position judging system as claimed in claim 1 is characterized in that: this system also comprises the horizontal alignment device that is available for users to adjust horizontality.
13. laser position judging system as claimed in claim 12 is characterized in that: this system also comprises the scale groove that is available for users to the recording laser position.
14. a laser position judging system is characterized in that, comprising: at least one photodiode is used to receive laser, and the laser that receives is converted to electric signal; Signal processing unit comprises input end and output terminal, and input end receives described electric signal, an output terminal high level of output or low level judgement signal; And responding device, when judging that signal is high level, responding device is made response.
15. laser position judging system as claimed in claim 14 is characterized in that: described photodiode comprises a plurality of arranged side by side and photodiodes that closely discharge.
16. as claim 14 or 15 described laser position judging systems, it is characterized in that: described signal processing unit comprises the signal rectification unit that input conversion of signals wherein can be become forward signal and export.
17. laser position judging system as claimed in claim 16, it is characterized in that: described signal processing unit also comprises voltage comparison unit, it comprises the first input end of the output signal of received signal rectification unit, second input end and the output terminal of the predefined reference voltage of reception, when the voltage of the input signal of first input end during greater than reference voltage, output terminal output high level.
18. laser position judging system as claimed in claim 17 is characterized in that: described signal processing unit also comprises the voltage conversion device that the electrical signal conversion of photodiode output can be become voltage signal and export.
19. laser position judging system as claimed in claim 18 is characterized in that: described signal processing unit also comprises can be with the voltage signal amplifying signal amplifying unit of voltage conversion device output.
20. as claim 14 or 15 described laser position judging systems, it is characterized in that: this system is provided with optical filter between photodiode and incident laser, is used for the light of the unnecessary wave band of filtering.
21. laser position judging system as claimed in claim 14 is characterized in that: this system also comprises the horizontal alignment device that is available for users to adjust horizontality.
22. laser position judging system as claimed in claim 21 is characterized in that: this system also comprises the scale groove that is available for users to the recording laser position.
23. a laser position determination methods is characterized in that this method comprises the steps:
Step 1: at least one photoreceptor, voltage conversion device, signal amplification unit, signal rectification unit, voltage comparison unit and responding device are provided;
Step 2: photoreceptor sensing laser and produce electric current, electric current converts voltage signal to and exports signal amplification unit to through voltage conversion device and amplifies;
Step 3: the signal after signal amplification unit will amplify exports signal rectification unit to, and signal rectification unit will be imported and export voltage comparison unit to after wherein conversion of signals becomes the unidirectional voltage signal;
Step 4: to reference voltage of voltage comparison unit input, above-mentioned unidirectional voltage signal and reference voltage are judged signal through behind the voltage comparison unit by one of voltage comparison unit output; And
Step 5: responding device is made response under the judgement signal drives.
24. laser position determination methods as claimed in claim 23 is characterized in that: this method also comprises before step 1 provides the horizontal alignment of calibrated horizontal state device.
25. laser position determination methods as claimed in claim 23 is characterized in that: described step 1 also provides first circuit and second circuit, first circuit is provided with first photoreceptor, and second circuit is provided with second photoreceptor.
26. laser position determination methods as claimed in claim 25 is characterized in that: comprise a voltage conversion device, a signal amplification unit, a signal rectification unit and a voltage comparison unit on described first circuit and the second circuit respectively.
27. as claim 24 or 26 described laser position determination methods, it is characterized in that: in the described step 4 when unidirectional voltage voltage of signals during greater than reference voltage, judge that signal is first level,, judge that signal is second level when unidirectional voltage voltage of signals during less than reference voltage.
28. laser position determination methods as claimed in claim 27 is characterized in that: when photoreceptor sensed laser, the unidirectional voltage voltage of signals was higher than reference voltage.
29. laser position determination methods as claimed in claim 27 is characterized in that: the responding device that described step 1 provided can be made response under first level signal drives, and can't make response under second level signal drives.
30. as claim 23 or 28 or 29 described laser position determination methods, it is characterized in that: this method also comprises step 6: provide the scale groove, for the position of user according to the responsive state record sensitivity speck of responding device in the step 5.
31. laser position determination methods as claimed in claim 30 is characterized in that: repeating step two is noted the position of another sensitivity speck to step 6, thereby and connects two sensitivity specks and draw the horizontal level at laser place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410097766 CN1782664A (en) | 2004-11-30 | 2004-11-30 | Laser position judging system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410097766 CN1782664A (en) | 2004-11-30 | 2004-11-30 | Laser position judging system and method |
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| CN1782664A true CN1782664A (en) | 2006-06-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323110A (en) * | 2013-06-05 | 2013-09-25 | 深圳市创鑫激光技术有限公司 | Photoelectric detection control circuit |
| CN103383255A (en) * | 2012-05-04 | 2013-11-06 | 施塔比拉-测量工具古斯塔夫乌尔里希公司 | Arrangement and method for detecting and indicating laser radiation |
| CN104729487A (en) * | 2013-12-19 | 2015-06-24 | 上海诺司纬光电仪器有限公司 | Laser swinger detector |
| CN109798881A (en) * | 2019-01-28 | 2019-05-24 | 安徽智训机器人技术有限公司 | Novel map mapping system |
-
2004
- 2004-11-30 CN CN 200410097766 patent/CN1782664A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383255A (en) * | 2012-05-04 | 2013-11-06 | 施塔比拉-测量工具古斯塔夫乌尔里希公司 | Arrangement and method for detecting and indicating laser radiation |
| US9927290B2 (en) | 2012-05-04 | 2018-03-27 | Stabila Messgerate Gustav Ullrich Gmbh | Arrangement and method for detecting and indicating laser radiation |
| CN103323110A (en) * | 2013-06-05 | 2013-09-25 | 深圳市创鑫激光技术有限公司 | Photoelectric detection control circuit |
| CN104729487A (en) * | 2013-12-19 | 2015-06-24 | 上海诺司纬光电仪器有限公司 | Laser swinger detector |
| CN109798881A (en) * | 2019-01-28 | 2019-05-24 | 安徽智训机器人技术有限公司 | Novel map mapping system |
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Open date: 20060607 |