CN205722026U - A kind of APD Laser Detecting Set being used in guest flow statistics - Google Patents
A kind of APD Laser Detecting Set being used in guest flow statistics Download PDFInfo
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- CN205722026U CN205722026U CN201620134025.5U CN201620134025U CN205722026U CN 205722026 U CN205722026 U CN 205722026U CN 201620134025 U CN201620134025 U CN 201620134025U CN 205722026 U CN205722026 U CN 205722026U
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Abstract
This utility model provides a kind of APD Laser Detecting Set being used in guest flow statistics, including: temperature-compensation circuit, APD detector, front electric discharge road, main discharge road, it is converted into the signal of telecommunication after APD detector exploring laser light, make the faint signal of telecommunication carry out first order amplification through front electric discharge road, be delivered to main discharge road；Main discharge road makes the signal of telecommunication amplify further, is filtered signal, and the signal of telecommunication of standard is sent in shaping, processes for subsequent processing units；Temperature-compensation circuit, when temperature changes, by compensating the high voltage level of APD, makes APD be in preferable duty all the time.This utility model reasonable in design, it is achieved the accurate statistics to the volume of the flow of passengers.This utility model uses APD detector to coordinate laser beam emitting device to carry out passenger flow statistics, is greatly improved accuracy rate.
Description
Technical field
This utility model relates to technical field of laser detection, concrete, relates to a kind of APD Laser Detecting Set being used in guest flow statistics.
Background technology
Infrared and the Visible Light Camera technology that at present passenger flow statistics uses carries out the statistics of passenger flow, but all to there is accuracy rate low for both statisticals, high in cost of production feature, not large-scale promotion.
Through retrieval, the Chinese patent application of Application No. CN201110412776.0, this application discloses a kind of passenger flow statistical method based on laser ranging and device, including: laser scanner launches laser beam according to the sampling period set to the surface channel of pedestrian, receive the packet of the positional information comprising reverberation reflected light beam being reflected back from described surface channel, by packet carries out resolving the coordinate data of the described reverberation of acquisition；Coordinate data according to described reverberation and the decision threshold of setting, it is judged that described reverberation is pedestrian；Difference between the coordinate datas of the pedestrian comprised in the quantity of the convex curve that coordinate data according to the pedestrian comprised in one group of packet that described laser scanner received in the same sampling period is corresponding and the different group packets that receive in the neighbouring sample cycle distinguishes pedestrian one by one, carries out guest flow statistics.
The Chinese patent application of Application No. CN201110219594.1, the invention provides a kind of laser passenger flow detection method and device, including: in the horizontal plane away from ground level altitude, mobile vertical two-dimensional laser is scanned to the other end back and forth from three-dimensional spatial area one end, it is thus achieved that each laser scanning cross section information；Acquired each laser scanning cross section information is spliced, obtains the splicing cross section information of three-dimensional spatial area；Splicing cross section information obtained by analysis, obtains passenger flow information.
Above-mentioned patent use three dimensions modeling achieve to passenger flow statistics, need space travel mechanism to be scanned back and forth from the one of three-dimensional spatial area section to the other end, be unfavorable for promoting.
APD (avalanche photodide) laser acquisition has all played significant role in the every field such as range finder, laser warning, but yet there are no report in passenger flow statistics field.
Utility model content
For defect of the prior art, the purpose of this utility model is to provide a kind of APD Laser Detecting Set being used in guest flow statistics, this device uses high sensitivity APD detector exploring laser light echo-signal to carry out the accurate statistics volume of the flow of passengers, has compact structure, low in energy consumption, the feature of low cost.
For achieving the above object, this utility model is by the following technical solutions:
This utility model provides a kind of APD Laser Detecting Set being used in guest flow statistics, including: APD detector, front electric discharge road, main discharge road and temperature-compensation circuit, wherein:
Described APD detector, detection, after the laser that pedestrian reflects, is converted into the signal of telecommunication and exports to described front electric discharge road；
Electric discharge road before described, carries out first order amplification to the signal of telecommunication of described APD detector output, and after amplification, output is to described main discharge road；
Described main discharge road, amplifies further to the signal of telecommunication after the first order of electric discharge road output is amplified before described, and signal is filtered, the signal of telecommunication of standard is sent in shaping, for subsequent treatment；
Described temperature-compensation circuit, for compensating when temperature changes, makes APD detector be in preferable duty all the time.
Preferably, described temperature-compensation circuit is that bias high voltage compensates circuit, and when temperature changes, this circuit, by compensating the high voltage level of the APD (avalanche photodide) of APD detector, makes APD detector be in preferable duty all the time.
Preferably, described APD detector is provided with increase noise suppressed and gain control circuit, to improve detection sensitivity.
Preferably, described front electric discharge road is provided with direct current and eliminates circuit, and the signal of telecommunication of described APD detector output eliminates circuit by described direct current and filters the direct current component of photoelectric current, obtains a measurable differential voltage.
Preferably, described main discharge route a series of continuous print amplifiers composition, and the measurable differential voltage exporting front electric discharge road carries out the voltage amplification of continuous print, high-gain, until reaching required signal amplitude.
Compared with prior art, this utility model has a following beneficial effect:
The laser straight sending and receiving that this utility model uses are penetrated, and receive the laser mode realization statistics to passenger flow with APD, it is not necessary to are scanned back and forth from the one of three-dimensional spatial area section to the other end, therefore save space travel mechanism, are more conducive to promote.
The application of APD laser acquisition module at present is also not directed to passenger flow statistics field, and uses infrared and Visible Light Camera statistics accuracy rate relatively low.This utility model uses APD detector to coordinate laser beam emitting device to carry out passenger flow statistics, is greatly improved accuracy rate.This utility model uses the APD detector of large photosensistive surface high sensitivity (-50dBm) can accurately detect the personnel in passenger flow, and rate of accuracy reached is to more than 95%, and range accuracy reaches 5cm.
Accompanying drawing explanation
The detailed description with reference to the following drawings, non-limiting example made by reading, other features, objects and advantages of the present utility model will become more apparent upon:
Fig. 1 is this utility model device composition frame chart；
In figure: APD detector 1, front electric discharge road 2, main discharge road 3, temperature-compensation circuit 4.
Detailed description of the invention
Below in conjunction with specific embodiment, this utility model is described in detail.Following example will assist in those skilled in the art and are further appreciated by this utility model, but limit this utility model the most in any form.It should be pointed out that, to those skilled in the art, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement.These broadly fall into protection domain of the present utility model.
As it is shown in figure 1, a kind of APD Laser Detecting Set being used in guest flow statistics, this device coordinates laser beam emitting device to use, and with laser beam emitting device transmitting laser to pedestrian, APD Laser Detecting Set detects.
Specifically, described APD Laser Detecting Set includes: APD detector 1, front electric discharge road 2, main discharge road 3, temperature-compensation circuit 4；The input of described APD detector accepts optical signal, is simultaneously connected with temperature-compensation circuit；The outfan of described APD detector connects the input on front electric discharge road, and the outfan on front electric discharge road connects the input on main discharge road, and the outfan on main discharge road is connected to subsequent processing device, wherein:
Described APD detector 1, detection, after the laser that pedestrian reflects, is converted into the signal of telecommunication and exports to described front electric discharge road 2；
Electric discharge road 2 before described, carries out first order amplification to the signal of telecommunication of described APD detector 1 output, and after amplification, output is to described main discharge road 3；
Described main discharge road 3, amplifies further to the signal of telecommunication after the first order of electric discharge road 2 output is amplified before described, and signal is filtered, the signal of telecommunication of standard is sent in shaping, for subsequent treatment；
Described temperature-compensation circuit 4, for compensating when temperature changes, makes APD detector 1 be in preferable duty all the time.
In one embodiment, described temperature-compensation circuit 4 compensates circuit for bias high voltage, and when temperature changes, this circuit, by compensating the high voltage level of the APD of APD detector, makes APD detector be in preferable duty all the time.Described temperature-compensation circuit 4 uses temperature-compensating snowslide pipe bias techniques, makes the bias voltage of snowslide pipe change with the change of ambient temperature, to keep the signal to noise ratio of whole reception channel to be in more satisfactory state.
In one embodiment, described APD detector 1, use the device of domestic maturation, its response frequency range is 400～1100nm.
In one embodiment, described APD detector 1 is further provided with increasing noise suppressed and gain control circuit, to improve detection sensitivity.
In one embodiment, described front electric discharge road 2 is provided with direct current and eliminates circuit, and the signal of telecommunication of described APD detector 1 output eliminates circuit by described direct current and filters the direct current component of photoelectric current, obtains a measurable differential voltage.
Described measurable differential voltage is to eliminate circuit by direct current to filter the direct current component of photoelectric current, the real differential voltage be given, thus the receiving portion of whole APD Laser Detecting Set signal is the most no longer affected by direct current bias light, and decrease the distortion of pulse width.The PECL level of the standard required for smaller measurable differential voltage transition one-tenth that front electric discharge road 2 is exported by described main discharge road 3.
In one embodiment, described main discharge road 3 is made up of a series of continuous print amplifiers, and the measurable differential voltage exporting front electric discharge road 2 carries out the voltage amplification of continuous print, high-gain, until reaching required signal amplitude.
The work process of said apparatus is as follows:
1, System self-test
Before work, whole device is carried out self-inspection, if self-inspection is abnormal, then provide indicating fault, it is provided that warning message；
2, APD detector 1 receives laser signal, carries out opto-electronic conversion, makes laser signal be converted into the signal of telecommunication, and the signal of telecommunication after conversion is exported to front electric discharge road；
4, the signal of telecommunication that APD detector 1 is exported by front electric discharge road carries out first order amplification, and flows to main discharge road；
5, the signal of telecommunication that the premenstrual electric discharge road first order is amplified is amplified by main discharge road further, the signal of telecommunication of outputting standard, processes for subsequent processing device；
6, when environment temperature change, the own temperature that requires more than the APD of APD detector 1 time, temperature-compensation circuit starts working, and makes the running voltage of APD go to mate the temperature at place all the time, makes APD detector 1 always work in preferable state；
7, other circuit or equipment is coordinated to calculate range information and the quantity information of target.
In another embodiment, this utility model APD Laser Detecting Set and Gao Zhongying laser beam emitting device with the use of, Gao Zhongying laser instrument is used to launch, the detection of this utility model APD Laser Detecting Set is from the laser of pedestrian's reflection, by calculating flight time and the quantity of laser during measurement, carry out passenger flow statistics.Gao Zhongying laser beam emitting device in this embodiment may include that LD laser instrument, and the input of described LD laser instrument connects LD driver part, the outfan of LD temperature-controlled member, and described LD laser output connects the input of LD collimating components；The TTL signal of standard is exported described LD laser instrument by described LD driver part；Laser launched by described LD laser instrument, and laser is transmitted on pedestrian by described LD collimating components, and LD temperature-controlled member is used for making LD laser instrument remain in a temperature range.
This utility model saves space travel mechanism, be conducive to promoting, high sensitivity APD detector exploring laser light echo-signal is used to add up the volume of the flow of passengers, there is compact structure, low in energy consumption, the feature of low cost, and the personnel in passenger flow can accurately be detected by APD detector, rate of accuracy reached is to more than 95%, and range accuracy reaches 5cm.
Coordinate between each several part of above-described embodiment, reasonable in design, realize the accurate statistics problem etc. to the volume of the flow of passengers, above-mentioned each parts (temperature-compensation circuit, APD detector, front electric discharge road, main discharge road) all can use prior art to realize, can select according to practical situation and needs, as long as each above-mentioned technical purpose can be realized, this does not affect for essence of the present utility model.
Above specific embodiment of the utility model is described.It is to be appreciated that this utility model is not limited to above-mentioned particular implementation, those skilled in the art can make various deformation or amendment within the scope of the claims, and this has no effect on flesh and blood of the present utility model.
Claims (6)
1. the APD Laser Detecting Set for guest flow statistics, it is characterised in that including: APD detector, front
Electric discharge road, main discharge road and temperature-compensation circuit, wherein:
Described APD detector, detection after the laser that pedestrian reflects, be converted into the signal of telecommunication and export extremely the most described before
Electric discharge road；
Described before electric discharge road, to described APD detector output the signal of telecommunication carry out first order amplification, export after amplification to
Described main discharge road；
Described main discharge road, amplifies further to the signal of telecommunication after the first order amplification of described front electric discharge road output, and to letter
Number be filtered, the signal of telecommunication of standard is sent in shaping, for subsequent treatment；
Described temperature-compensation circuit, for compensating when temperature changes, makes APD detector locate all the time resonable
The duty thought.
A kind of APD Laser Detecting Set for guest flow statistics the most according to claim 1, it is characterised in that
Described temperature-compensation circuit is that bias high voltage compensates circuit, and when temperature changes, this circuit is by compensating APD
The high voltage level of the APD of detector, makes APD detector be in preferable duty all the time.
A kind of APD Laser Detecting Set for guest flow statistics the most according to claim 1, it is characterised in that
Described APD detector, its response frequency range is 400～1100nm.
A kind of APD Laser Detecting Set for guest flow statistics the most according to claim 3, it is characterised in that
Described APD detector is provided with increase noise suppressed and gain control circuit.
5. according to a kind of APD Laser Detecting Set for guest flow statistics described in any one of claim 1-4, its
Being characterised by, described front electric discharge road is provided with direct current and eliminates circuit, and the signal of telecommunication of described APD detector output passes through institute
State direct current elimination circuit and filter the direct current component of photoelectric current, obtain a measurable differential voltage.
A kind of APD Laser Detecting Set for guest flow statistics the most according to claim 5, it is characterised in that
Described main discharge route a series of continuous print amplifiers composition, carries out measurable differential voltage of front electric discharge road output
Continuous print, the voltage amplification of high-gain, until reaching required signal amplitude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620134025.5U CN205722026U (en) | 2016-02-22 | 2016-02-22 | A kind of APD Laser Detecting Set being used in guest flow statistics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620134025.5U CN205722026U (en) | 2016-02-22 | 2016-02-22 | A kind of APD Laser Detecting Set being used in guest flow statistics |
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| CN205722026U true CN205722026U (en) | 2016-11-23 |
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| CN201620134025.5U Expired - Fee Related CN205722026U (en) | 2016-02-22 | 2016-02-22 | A kind of APD Laser Detecting Set being used in guest flow statistics |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362393A (en) * | 2017-12-21 | 2018-08-03 | 北京航天控制仪器研究所 | A kind of low noise APD photoelectric conversion devices |
| CN108508429A (en) * | 2018-03-28 | 2018-09-07 | 上海融军实业有限公司 | Highly sensitive large photosensistive surface APD detecting modules in laser radar |
| CN112925363A (en) * | 2019-12-05 | 2021-06-08 | 上海北分科技股份有限公司 | Online temperature compensation method and system, controller and online temperature compensation device thereof |
-
2016
- 2016-02-22 CN CN201620134025.5U patent/CN205722026U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362393A (en) * | 2017-12-21 | 2018-08-03 | 北京航天控制仪器研究所 | A kind of low noise APD photoelectric conversion devices |
| CN108508429A (en) * | 2018-03-28 | 2018-09-07 | 上海融军实业有限公司 | Highly sensitive large photosensistive surface APD detecting modules in laser radar |
| CN112925363A (en) * | 2019-12-05 | 2021-06-08 | 上海北分科技股份有限公司 | Online temperature compensation method and system, controller and online temperature compensation device thereof |
| CN112925363B (en) * | 2019-12-05 | 2022-05-17 | 上海北分科技股份有限公司 | Online temperature compensation method and system, controller and online temperature compensation device thereof |
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| 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: 20161123 |