CN101960941A - Laser control land leveling receiver circuit - Google Patents
Laser control land leveling receiver circuit Download PDFInfo
- Publication number
- CN101960941A CN101960941A CN 201010262459 CN201010262459A CN101960941A CN 101960941 A CN101960941 A CN 101960941A CN 201010262459 CN201010262459 CN 201010262459 CN 201010262459 A CN201010262459 A CN 201010262459A CN 101960941 A CN101960941 A CN 101960941A
- Authority
- CN
- China
- Prior art keywords
- circuit
- laser
- comparator
- links
- gain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a laser control land leveling receiver circuit which comprises a multiple-laser detection circuit and a gain automatic adjusting circuit, wherein the multiple-laser detection circuit is used for converting light signals into digital signals of a logic gating circuit; and the gain automatic adjusting circuit is connected with the multiple-laser detection circuit and used for automatically adjusting the gain of the multiple-laser detection circuit according to outside light intensity. According to the laser control land leveling receiver circuit, a functional module for automatically adjusting and amplifying the gain according to the outside light intensity is additionally provided, the adaptability of the receiver circuit to the outside light intensity is enhanced, and the stability and the automation of the receiver circuit are improved. The laser control flat receiver circuit ensures that a land leveling efficiency and the leveling precision are improved when applied to the land leveling.
Description
Technical field
The invention belongs to the smooth technical field in farmland, relate to a kind of laser pickoff circuit, particularly relate to a kind of a kind of laser controlled leveling acceptor circuit that in laser leveling system, uses.
Background technology
The conduct of laser controlled leveling technology is state-of-the-art in the world land readjustment technology at present, has obtained using widely in developed countries such as America and Europe, Japan in recent decades.Laser leveling system is mainly shoveled etc. pacifically by generating laser, laser pickoff, controller, hydraulic system to be formed.Laser pickoff is the key components of laser leveling system.Laser pickoff is to receive transposition by the signal that the photoelectric sensor that a series of vertical symmetry with control point, center distribute constitutes.Laser pickoff is vertically mounted on the level land and produces on the mast of equipment, bridge as transmitter that connects that excuse me and controller, receive laser signal in real time from generating laser, thereby determine the instantaneous position deviation at laser reference plane and control point, center, and send corrected signal to controller, lifting by controller control Leveling implements is positioned within the laser reference plane control point, center of receiver.Laser pickoff mainly is made up of optical system, photodetector, low-noise amplifier, shaping and widening circuit etc., be mainly used in opto-electronic conversion and the transmission finished laser pulse signal, its comprehensive technical indexes is mainly determined by the performance indications of detector and amplifier.
The laser leveling system general work is in the wild environment of complexity, when ambient light is shone by force, light intensity adaptability is relatively poor to external world for present laser pickoff circuit, the circuit saturated phenomenon often appears, cause system's cisco unity malfunction, need just to carry out work after artificially light intensity or circuit parameter are intervened to external world, this just makes that the operating efficiency of system and work quality are seriously influenced.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: how to improve the laser controlled leveling acceptor circuit adaptability of light intensity to external world, the stability and the automaticity of laser controlled leveling acceptor circuit place laser leveling system are improved.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of laser controlled leveling acceptor circuit, it comprises:
The multi-path laser testing circuit is used for optical signal is converted to the logic gates data signal;
Gain Automatic adjustment circuit links to each other with described multi-path laser testing circuit, is used for regulating automatically according to extraneous light intensity the gain of described multi-path laser testing circuit.
In the above-mentioned laser controlled leveling acceptor circuit, each the road laser sensor circuit in the described multi-path laser testing circuit comprises:
Optical-electrical converter is used for optical signal is converted to the signal of telecommunication;
Preamplifier and main amplifier, described preamplifier links to each other with described optical-electrical converter, and described main amplifier links to each other with described preamplifier, is used to amplify the described signal of telecommunication;
Shaping circuit and widening circuit, described shaping circuit links to each other with described main amplifier, and described widening circuit links to each other with described shaping circuit, is used for the signal of telecommunication after the described amplification is converted to the logic gates data signal.
In the above-mentioned laser controlled leveling acceptor circuit, described Gain Automatic adjustment circuit comprises:
Optical-electrical converter is used for external optical signals is converted to current signal;
Amplifier links to each other with described optical-electrical converter, described current signal is amplified and be converted to voltage signal and export;
Comparator links to each other with described amplifier, also is connected with reference voltage on it, and the voltage signal of more described reference voltage of comparator and amplifier output is exported high/low level;
Analog switch links to each other respectively with described preamplifier with described comparator;
Gain-adjusted resistance links to each other respectively with described preamplifier with described analog switch.
In the above-mentioned laser controlled leveling acceptor circuit, described Gain Automatic adjustment circuit comprises the described analog switch of multi-channel parallel, and the analog switch of described multi-channel parallel links to each other with described comparator respectively.
In the above-mentioned laser controlled leveling acceptor circuit, the way of described analog switch is identical with the way of described laser sensor circuit.
In the above-mentioned laser controlled leveling acceptor circuit, the way of described gain-adjusted resistance is identical with the way of described analog switch.
In the above-mentioned laser controlled leveling acceptor circuit, described comparator is set to one or more parallel connection.
In the above-mentioned laser controlled leveling acceptor circuit, in the comparator of described multi-channel parallel, an end of each road comparator links to each other with described amplifier, and the other end links to each other with described analog switch.
In the above-mentioned laser controlled leveling acceptor circuit, the reference voltage that the comparator of described multi-channel parallel connects is different.
In the above-mentioned laser controlled leveling acceptor circuit, in the reference voltage that the comparator of described multi-channel parallel connects, when Vi＞Vj, Ri＜Rj, wherein, the reference voltage that the two-way comparator that Vi, Vj are respectively in parallel connects, Ri, Rj are respectively the corresponding gain-adjusted resistance with reference voltage V i, Vj, 1≤i≤n, 1≤j≤n, and i ≠ j, n are the way of the comparator of parallel connection.
(3) beneficial effect
Compare with existing laser controlled leveling acceptor circuit, increased the functional module that to adjust gain amplifier according to extraneous light intensity automatically in the laser controlled leveling acceptor circuit of the present invention, strengthened the adaptability of system for extraneous light intensity, the stability and the automaticity of system have been improved, be applied in the land readjustment, make land readjustment efficient and smooth precision be improved.
Description of drawings
Fig. 1 is a laser sensor circuit functional block diagram in the laser controlled leveling acceptor circuit of the present invention;
Fig. 2 is a Gain Automatic adjustment circuit function block diagram in the laser controlled leveling acceptor circuit of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
Laser controlled leveling acceptor circuit of the present invention comprises multi-path laser testing circuit and Gain Automatic adjustment circuit.
Laser sensor circuit comprises optical-electrical converter, preposition amplification appliance, main amplifier, shaping circuit and widening circuit as shown in Figure 1.At first, incident light is through the influence of combination filtering apparatus with the weakening bias light, through opto-electronic conversion optical signal is converted to the faint signal of telecommunication then, realize the amplification of small-signal again by preamplifier and main amplifier, (Transistor-Transistor Logic, TTL) data signal sends controller to by shaping and widening circuit pulse signal to be converted to logic gates at last.
Gain Automatic adjustment circuit comprises optical-electrical converter, amplifier, comparator, analog switch and gain-adjusted resistance as shown in Figure 2.Optical-electrical converter is used to detect external optical signals and is converted to current signal, amplifier amplifies current signal, and the voltage signal that is converted to certain amplitude is exported, this voltage signal input comparator and positive reference voltage compare, the high-low level of comparator output is used to control the break-make of analog switch, decide gain-adjusted resistance whether in parallel with the feedback resistance in the preamplifier of above-mentioned multi-path laser testing circuit, thereby realize the automatic adjusting of feedback resistance size, the automatic adjusting of gain amplifier just.When extraneous light intensity surpassed certain intensity, the output voltage of amplifier was during greater than reference voltage, comparator output high level, the analog switch closure, gain-adjusted resistance is in parallel with the feedback resistance of preamplifier, causes the feedback resistance of preamplifier to diminish, and gain diminishes; Otherwise, the comparator output low level, the control analog switch disconnects, and keeps the feedback resistance size of preamplifier constant, and gain remains unchanged.When ambient light was shone by force, the pregain of laser pickoff can diminish automatically, has prevented the saturated of amplifier, has guaranteed system stability work.At the output of comparator, according to the analog switch and the gain-adjusted resistance of the way of laser sensor circuit identical way in parallel, to realize the automatic adjusting of all laser sensor circuits gains.
For improving degree of regulation, can be at the comparator of the output of amplifier different reference voltages in parallel, the output of every road comparator, analog switch and gain-adjusted resistance according to the way of laser sensor circuit identical way in parallel, the resistance of gain-adjusted resistance reduces along with the increase of front end reference voltage, be in the reference voltage that connects of the comparator of multi-channel parallel, when Vi＞Vj, Ri＜Rj, wherein, Vi, the reference voltage that the two-way comparator that Vj is respectively in parallel connects, Ri, Rj is respectively and reference voltage V i, the corresponding gain-adjusted resistance of Vj, 1≤i≤n, 1≤j≤n, and i ≠ j, n are the way of the comparator of parallel connection, thereby guarantee the enhancing along with the ambient light line strength, circuit gain descends gradually.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and replacement, these improvement and replacement also should be considered as protection scope of the present invention.
Claims (10)
1. a laser controlled leveling acceptor circuit is characterized in that, comprising:
The multi-path laser testing circuit is used for optical signal is converted to the logic gates data signal;
Gain Automatic adjustment circuit links to each other with described multi-path laser testing circuit, is used for regulating automatically according to extraneous light intensity the gain of described multi-path laser testing circuit.
2. laser controlled leveling acceptor circuit as claimed in claim 1 is characterized in that, each the road laser sensor circuit in the described multi-path laser testing circuit comprises:
Optical-electrical converter is used for optical signal is converted to the signal of telecommunication;
Preamplifier and main amplifier, described preamplifier links to each other with described optical-electrical converter, and described main amplifier links to each other with described preamplifier, is used to amplify the described signal of telecommunication;
Shaping circuit and widening circuit, described shaping circuit links to each other with described main amplifier, and described widening circuit links to each other with described shaping circuit, is used for the signal of telecommunication after the described amplification is converted to the logic gates data signal.
3. laser controlled leveling acceptor circuit as claimed in claim 2 is characterized in that, described Gain Automatic adjustment circuit comprises:
Optical-electrical converter is used for external optical signals is converted to current signal;
Amplifier links to each other with described optical-electrical converter, described current signal is amplified and be converted to voltage signal and export;
Comparator links to each other with described amplifier, also is connected with reference voltage on it, and the voltage signal of more described reference voltage of comparator and amplifier output is exported high/low level;
Analog switch links to each other respectively with described preamplifier with described comparator;
Gain-adjusted resistance links to each other respectively with described preamplifier with described analog switch.
4. laser controlled leveling acceptor circuit as claimed in claim 3 is characterized in that, described Gain Automatic adjustment circuit comprises the described analog switch of multi-channel parallel, and the analog switch of described multi-channel parallel links to each other with described comparator respectively.
5. laser controlled leveling acceptor circuit as claimed in claim 4 is characterized in that, the way of described analog switch is identical with the way of described laser sensor circuit.
6. laser controlled leveling acceptor circuit as claimed in claim 4 is characterized in that, the way of described gain-adjusted resistance is identical with the way of described analog switch.
7. as claim 3 or 4 described laser controlled leveling acceptor circuits, it is characterized in that described comparator is set to one or more parallel connection.
8. laser controlled leveling acceptor circuit as claimed in claim 7 is characterized in that, in the comparator of described multi-channel parallel, an end of each road comparator links to each other with described amplifier, and the other end links to each other with described analog switch.
9. laser controlled leveling acceptor circuit as claimed in claim 8 is characterized in that, the reference voltage that the comparator of described multi-channel parallel connects is different.
10. laser controlled leveling acceptor circuit as claimed in claim 9, it is characterized in that, in the reference voltage that the comparator of described multi-channel parallel connects, when Vi＞Vj, Ri＜Rj, wherein, the reference voltage that the two-way comparator that Vi, Vj are respectively in parallel connects, Ri, Rj are respectively the corresponding gain-adjusted resistance with reference voltage V i, Vj, 1≤i≤n, 1≤j≤n, and i ≠ j, n are the way of the comparator of parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102624590A CN101960941B (en) | 2010-08-25 | 2010-08-25 | Laser control land leveling receiver circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102624590A CN101960941B (en) | 2010-08-25 | 2010-08-25 | Laser control land leveling receiver circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101960941A true CN101960941A (en) | 2011-02-02 |
| CN101960941B CN101960941B (en) | 2012-04-18 |
Family
ID=43514141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102624590A Expired - Fee Related CN101960941B (en) | 2010-08-25 | 2010-08-25 | Laser control land leveling receiver circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101960941B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103959944A (en) * | 2013-04-19 | 2014-08-06 | 常州华达科捷光电仪器有限公司 | Laser receiver for laser land leveling machine |
| CN110768395A (en) * | 2019-09-16 | 2020-02-07 | 南京航空航天大学 | Remote laser automatic charging system with protection function |
| CN110940987A (en) * | 2018-09-20 | 2020-03-31 | 欧姆龙(上海)有限公司 | Control device and method for photoelectric detection system and photoelectric detection system |
| CN112994633A (en) * | 2021-02-25 | 2021-06-18 | 中国空气动力研究与发展中心超高速空气动力研究所 | Photoelectric induction circuit and device for wind tunnel ballistic target free flight model detection |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0852901B1 (en) * | 1996-07-05 | 2002-04-03 | Sugano Farm Machinery Mfg. Co. Ltd. | Bottom cultivating machine & field cultivating machine for forming soil layer having uniform field |
| CN2720787Y (en) * | 2004-06-17 | 2005-08-31 | 中国农业大学 | Laser receiver for levelling ground system controlled by laser |
-
2010
- 2010-08-25 CN CN2010102624590A patent/CN101960941B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0852901B1 (en) * | 1996-07-05 | 2002-04-03 | Sugano Farm Machinery Mfg. Co. Ltd. | Bottom cultivating machine & field cultivating machine for forming soil layer having uniform field |
| CN2720787Y (en) * | 2004-06-17 | 2005-08-31 | 中国农业大学 | Laser receiver for levelling ground system controlled by laser |
Non-Patent Citations (2)
| Title |
|---|
| 《中国农业大学学位论文》 20070612 吕庆飞 激光控制平地系统的改进设计与试验研究 全文 1-10 , 2 * |
| 《中国农业大学硕士毕业论文》 20040331 林建涵 激光控制平地系统接收和控制装置的研究与开发 全文 1-10 , 2 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103959944A (en) * | 2013-04-19 | 2014-08-06 | 常州华达科捷光电仪器有限公司 | Laser receiver for laser land leveling machine |
| CN110940987A (en) * | 2018-09-20 | 2020-03-31 | 欧姆龙(上海)有限公司 | Control device and method for photoelectric detection system and photoelectric detection system |
| CN110768395A (en) * | 2019-09-16 | 2020-02-07 | 南京航空航天大学 | Remote laser automatic charging system with protection function |
| CN112994633A (en) * | 2021-02-25 | 2021-06-18 | 中国空气动力研究与发展中心超高速空气动力研究所 | Photoelectric induction circuit and device for wind tunnel ballistic target free flight model detection |
| CN112994633B (en) * | 2021-02-25 | 2022-06-03 | 中国空气动力研究与发展中心超高速空气动力研究所 | Photoelectric induction circuit and device for wind tunnel ballistic target free flight model detection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101960941B (en) | 2012-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101228915B1 (en) | Device and method for optimally adjusting transmitter parameters | |
| CN101960941B (en) | Laser control land leveling receiver circuit | |
| EP3917037A1 (en) | Optical receiving device | |
| CN105547470A (en) | Self-cancellation single photon detection system | |
| CN1581735A (en) | Optical receiving device for realizing luminous power adaptation of different inputs | |
| CN102098016A (en) | Avalanche photodiode gain stabilization control device and method | |
| CN103929139B (en) | The transimpedance preamplifier of the photoreceiver of High Precision Automatic gain control | |
| EP3680633A1 (en) | Optical power detection device and apparatus | |
| CN105044568B (en) | The fiber ultrasonic detecting system and detection method of self-adaptation type partial discharge of transformer | |
| JP5183288B2 (en) | Optical receiver | |
| CN101145851B (en) | Device and method for optimizing and adjusting determination level of receiver | |
| CN205120534U (en) | Dust detection device | |
| CN106341189B (en) | Optical module | |
| CN203135890U (en) | Light receiver | |
| CN204597973U (en) | Optical fiber communication experimental optical receiver module | |
| CN102594448B (en) | Extinction ratio measurement device | |
| CN105068059B (en) | A kind of photoelectric signal process equipment of laser guidance system | |
| CN103119866A (en) | Optoelectronic device for differential photoreception, with automatic compensation of phase and amplitude imbalances | |
| CN103532636A (en) | Optical module and receiving unit thereof | |
| CN203310514U (en) | Photoelectric detection and control circuit | |
| CN207717224U (en) | A kind of novel luminous power meter | |
| CN203632683U (en) | Loss of optical signal reception-hysteresis parameter adjusting circuit and optical module | |
| CN202026306U (en) | Photoelectric current monitoring circuit | |
| CN201063634Y (en) | Light receiver | |
| CN201886055U (en) | Full-range high-linearity analog signal buffer circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120418 Termination date: 20210825 |