CN205582172U - Laser receiver - Google Patents
Laser receiver Download PDFInfo
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- CN205582172U CN205582172U CN201620344522.8U CN201620344522U CN205582172U CN 205582172 U CN205582172 U CN 205582172U CN 201620344522 U CN201620344522 U CN 201620344522U CN 205582172 U CN205582172 U CN 205582172U
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Abstract
The utility model relates to a laser receiver, include the leading current -voltage conversion circuit, amplifier circuit, the shaping circuit that become the faint light current switchover of photoelectric detector received voltage, leading current -voltage conversion circuit output voltage signal by amplifier circuit handle for central processing unit through shaping circuit plastic then transmission after amplifying, amplifier circuit include cascaded one -level amplifier circuit, second grade amplifier circuit, tertiary amplifier circuit. The signal passes through the third stage amplifier and enlargies, improves the long -time job stabilization nature of transmission distance and system of signal.
Description
Technical field
This utility model relates to safety-security area, particularly to the laser pickoff of a kind of wireless laser anti-theft device.
Background technology
Current wireless laser anti-theft device, one generating laser of general employing and a laser pickoff, utilize the feature of laser straightline propagation, it is arranged on robber porch, when there being robber to swarm into, health blocks and makes the laser of laser transmitter projects not propagate to be irradiated on laser pickoff, in laser pickoff, will appear from laser interrupt and produce such as one pulse signal of output, can be by judging that someone swarms into this pulse signal or other reaction signal on anti theft host, main frame is the most just reminded by modes such as acousto-optic-electrics, indicate that unsafe incidents occurs.Owing to being to use laser intelligence at doorway, holding wire is not the most used to connect, therefore, also referred to as wireless laser anti-theft device.Such wireless laser anti-theft device is typically by the signal of a fixed frequency of a branch of pulse width modulation of laser transmitter projects, laser pickoff is received after laser light signal is converted to the signal of telecommunication by photoelectric device and is demodulated, if sheltered from by light beam, then send alarm signal.
In the receptor of current wireless laser anti-theft signal, there is amplifying device, and amplifying device typically uses preamplifier and first stage amplifier composition, laser signal dress is changed to the signal of telecommunication by preamplifier, then it is transferred to central processing unit by first stage amplifier after being amplified process, its shortcoming is: 1. signal amplification factor is little, it is impossible to long-distance transmissions signal, needs to install more wireless laser anti-theft device in wireless laser theft-prevention applications.2. inconvenience is installed, needs during installation and debugging to turn laser facula down and it needs to laser facula registration signal accurately is received device.3. system long-play stability is bad, owing to working long hours in outdoor, is reported by mistake by after causing laser facula skew little by little under the influence of external force of environment.
Summary of the invention
For in existing wireless laser anti-theft device, the deficiency that amplification anti-theft device signal transmission distance is little, system installation and debugging inconvenient and system long-play is unstable of laser signal receivers, this utility model provides a kind of laser pickoff, this laser pickoff has wireless laser signal receiving and amplifying device, this device can not only improve the transmission range of signal greatly, under identical communication distance, around laser facula, the place in certain distance can receive signal, facilitate installation and debugging, but also the long playing stability of the system that improves.
The technical solution of the utility model is a kind of laser pickoff, being converted into the preposition current-to-voltage converting circuit of voltage, amplifying circuit, shaping circuit including the faint light electric current received by photodetector, the voltage signal of described preposition current-to-voltage converting circuit output is then transferred to central processing unit through shaping circuit shaping after being amplified by described amplifying circuit and processes；Described amplifying circuit includes the one-level amplifying circuit of cascade, second amplifying circuit, three-stage amplifier.
Signal is amplified by third stage amplifier, the stability that the transmission range of raising signal and system work long hours.
Further, in above-mentioned laser pickoff: described one-level amplifying circuit includes operational amplifier T1, resistance R47, resistance R48, resistance R49, resistance R50, electric capacity C27 and electric capacity C30；
The outfan (VOUT1) of described preposition current-to-voltage converting circuit connects the out-phase end of operational amplifier T1 by resistance R48；The positive pole of power supply is followed by the in-phase end of operational amplifier T1 by resistance R50 and resistance R49 dividing potential drop over the ground；Resistance R47 is connected between out-phase end and the outfan of operational amplifier T1；The outfan (VOUT2) of described one-level amplifying circuit is formed after operational amplifier T1 is by electric capacity C30；Electric capacity C27 is arranged between operational amplifier T1 in-phase end and ground.
Further, in above-mentioned laser pickoff: described second amplifying circuit and the 3rd pole amplifying circuit are identical, including operational amplifier T2, resistance R54, resistance R53, resistance R61, electric capacity C29 and electric capacity C33；
The out-phase end of described operational amplifier T2 passes through serial resistance R54 and electric capacity C29 ground connection；The outfan (VOUT2) of described one-level amplifying circuit connects the in-phase end of described operational amplifier T2；Resistance R53 is arranged between out-phase end and the outfan of operational amplifier T2；Operational amplifier T2 outfan is by electric capacity C33 and resistance R61 series winding ground connection, and the connection of electric capacity C33 and resistance R61 goes out the outfan (VOUT3) of the second amplifying circuit described in drawing；Outfan (VOUT2) at described one-level amplifying circuit is additionally provided with voltage pull-up circuit on the connecting line of the in-phase end of described operational amplifier T2.
Further, in above-mentioned laser pickoff: described voltage pull-up circuit includes resistance R55, resistance R51, resistance R52 and electric capacity C28；Positive source passes through resistance R51 and resistance R52 ground connection, is connect the in-phase end of operational amplifier between resistance R51 and resistance R52 by resistance R55；Electric capacity C28 is in parallel with resistance R52.
One, two, three amplifying circuit is simple.
Further, in above-mentioned laser pickoff: described preposition current-to-voltage converting circuit includes operational amplifier T3, resistance R44, resistance R43 and electric capacity C25, voltage pull-up circuit；
The negative electrode of laser pick-off pipe L1 connects the positive pole of power supply, and the anode serial resistance R44 of laser pick-off pipe L1 connects the out-phase end of operational amplifier T3；The anode series capacitance C25 of laser pick-off pipe L1 connects the in-phase end of operational amplifier T3；At the voltage pull-up circuit that the in-phase end of operational amplifier T3 also connects；Resistance R43 is connected across between out-phase end and the outfan of operational amplifier T3, and the outfan of operational amplifier T3 is the outfan (OUT1) of preposition current-to-voltage converting circuit.
Front end circuit uses transimpedance shunt voltage reversed feedback amplifier, and current signal is converted to voltage signal, reduces equivalent input noise current, carries signal and receives high sensitivity.
Further, in above-mentioned laser pickoff: described shaping circuit includes voltage comparator T4, resistance R63, resistance R64, resistance R65 and electric capacity C35；
The output (OUT4) of third level amplifying circuit connects the in-phase end of voltage comparator T4；Positive source connects the out-phase end of voltage comparator T4 by serial resistance R63, voltage comparator T4 out-phase end also by resistance R64 and electric capacity C35 and circuit ground, connected by resistance R65 at the outfan of voltage comparator T4 and draw power supply.
Signal after amplification passes through shaping circuit shaping, it is provided that a complete Transistor-Transistor Logic level signal output, reduces the false alarm that signal noise produces.
Below with reference to drawings and Examples, this utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is this utility model structured flowchart.
Fig. 2 is preposition current-to-voltage converting circuit schematic diagram in this utility model embodiment.
Fig. 3 is first order amplifying circuit schematic diagram in this utility model embodiment.
Fig. 4 is second, third grade of amplifying circuit schematic diagram in this utility model embodiment.
Fig. 5 is voltage pull-up circuit schematic diagram in second, third grade of amplifying circuit and preposition current-to-voltage converting circuit in this utility model embodiment.
Fig. 6 is shaping circuit schematic diagram in this utility model embodiment.
Detailed description of the invention
Embodiment 1, the present embodiment is laser pickoff in a kind of wireless laser anti-theft device, as it is shown in figure 1, wireless laser receptor includes current-to-voltage converting circuit, one-level amplifying circuit, second amplifying circuit, three-stage amplifier and shaping circuit.Wherein current-to-voltage converting circuit is as in figure 2 it is shown, it uses transimpedance shunt voltage reversed feedback amplifier, and the faint light electric current received by photodetector is converted into voltage and is transferred to one-level amplifying circuit after amplifying.Physical circuit is to include operational amplifier T3, resistance R44, resistance R43 and electric capacity C25, voltage pull-up circuit；As in figure 2 it is shown, the negative electrode of laser pick-off pipe L1 connects the positive pole of power supply, the anode serial resistance R44 of laser pick-off pipe L1 connects the out-phase end of operational amplifier T3；The anode series capacitance C25 of laser pick-off pipe L1 connects the in-phase end of operational amplifier T3；At the voltage pull-up circuit that the in-phase end of operational amplifier T3 also connects；Resistance R43 is connected across between out-phase end and the outfan of operational amplifier T3, and the outfan of operational amplifier T3 is the outfan OUT1 of preposition current-to-voltage converting circuit.
First order amplifying circuit is as it is shown on figure 3, include operational amplifier T1, resistance R47, resistance R48, resistance R49, resistance R50, electric capacity C27 and electric capacity C30；
The outfan VOUT1 of preposition current-to-voltage converting circuit connects the out-phase end of operational amplifier T1 by resistance R48；The positive pole of power supply is followed by the in-phase end of operational amplifier T1 by resistance R50 and resistance R49 dividing potential drop over the ground；Resistance R47 is connected between out-phase end and the outfan of operational amplifier T1；The outfan (VOUT2) of described one-level amplifying circuit is formed after operational amplifier T1 is by electric capacity C30；Electric capacity C27 is arranged between operational amplifier T1 in-phase end and ground.
In the present embodiment, second, third grade of amplifying circuit uses identical basic circuit diagram to include operational amplifier T2, resistance R54, resistance R53, resistance R61, electric capacity C29 and electric capacity C33 as shown in Figure 4；
The out-phase end of operational amplifier T2 passes through serial resistance R54 and electric capacity C29 ground connection；The outfan VOUT2 of described one-level amplifying circuit connects the in-phase end of described operational amplifier T2；Resistance R53 is arranged between out-phase end and the outfan of operational amplifier T2；Operational amplifier T2 outfan goes out to draw the outfan VOUT3 of second amplifying circuit by electric capacity C33 and resistance R61 series winding ground connection, the connection of electric capacity C33 and resistance R61；The connecting line of the in-phase end of the outfan VOUT2 and described operational amplifier T2 of described one-level amplifying circuit is additionally provided with voltage pull-up circuit.
If the 3rd pole amplifying circuit then uses the in-phase end of the outfan VOUT3 operational amplifier T2 of second amplifying circuit, outfan VOUT4.
Fig. 5 is the voltage pull-up circuit used in preposition current-to-voltage converting circuit and second, third grade of amplifying circuit, and voltage pull-up circuit includes resistance R55, resistance R51, resistance R52 and electric capacity C28；Positive source passes through resistance R51 and resistance R52 ground connection, is connect the in-phase end of operational amplifier between resistance R51 and resistance R52 by resistance R55；Electric capacity C28 is in parallel with resistance R52.
Shaping circuit includes voltage comparator T4, resistance R63, resistance R64, resistance R65 and electric capacity C35 as shown in Figure 6；The output (OUT4) of third level amplifying circuit connects the in-phase end of voltage comparator T4；Positive source connects the out-phase end of voltage comparator T4 by serial resistance R63, voltage comparator T4 out-phase end also by resistance R64 and electric capacity C35 and circuit ground, connected by resistance R65 at the outfan of voltage comparator T4 and draw power supply.Current-to-voltage converting circuit and one, two, three amplifying circuit use integrated operational amplifier NE5532, and shaping circuit uses LM311 voltage comparator, and power supply is that 12V single supply is powered.
Claims (6)
1. a laser pickoff, being converted into the preposition current-to-voltage converting circuit of voltage, amplifying circuit, shaping circuit including the faint light electric current received by photodetector, the voltage signal of described preposition current-to-voltage converting circuit output is then transferred to central processing unit through shaping circuit shaping after being amplified by described amplifying circuit and processes；It is characterized in that: described amplifying circuit includes the one-level amplifying circuit of cascade, second amplifying circuit, three-stage amplifier.
Laser pickoff the most according to claim 1, it is characterised in that: described one-level amplifying circuit includes operational amplifier T1, resistance R47, resistance R48, resistance R49, resistance R50, electric capacity C27 and electric capacity C30；
The outfan (VOUT1) of described preposition current-to-voltage converting circuit connects the out-phase end of operational amplifier T1 by resistance R48；The positive pole of power supply is followed by the in-phase end of operational amplifier T1 by resistance R50 and resistance R49 dividing potential drop over the ground；Resistance R47 is connected between out-phase end and the outfan of operational amplifier T1；The outfan (VOUT2) of described one-level amplifying circuit is formed after operational amplifier T1 is by electric capacity C30；Electric capacity C27 is arranged between operational amplifier T1 in-phase end and ground.
Laser pickoff the most according to claim 1, it is characterised in that: described second amplifying circuit and the 3rd pole amplifying circuit are identical, including operational amplifier T2, resistance R54, resistance R53, resistance R61, electric capacity C29 and electric capacity C33；
The out-phase end of described operational amplifier T2 passes through serial resistance R54 and capacitance C29 ground connection；The outfan (VOUT2) of described one-level amplifying circuit connects the in-phase end of described operational amplifier T2；Resistance R53 is arranged between out-phase end and the outfan of operational amplifier T2；Operational amplifier T2 outfan is by electric capacity C33 and resistance R61 series winding ground connection, and the connection of electric capacity C33 and resistance R61 goes out the outfan (VOUT3) of the second amplifying circuit described in drawing；Outfan (VOUT2) at described one-level amplifying circuit is additionally provided with voltage pull-up circuit on the connecting line of the in-phase end of described operational amplifier T2.
Laser pickoff the most according to claim 1, it is characterised in that: described preposition current-to-voltage converting circuit includes operational amplifier T3, resistance R44, resistance R43 and electric capacity C25, voltage pull-up circuit；
The negative electrode of laser pick-off pipe L1 connects the positive pole of power supply, and the anode serial resistance R44 of laser pick-off pipe L1 connects the out-phase end of operational amplifier T3；The anode series capacitance C25 of laser pick-off pipe L1 connects the in-phase end of operational amplifier T3；At the voltage pull-up circuit that the in-phase end of operational amplifier T3 also connects；Resistance R43 is connected across between out-phase end and the outfan of operational amplifier T3, and the outfan of operational amplifier T3 is the outfan (OUT1) of preposition current-to-voltage converting circuit.
5. according to the laser pickoff described in claim 3 or 4, it is characterised in that: described voltage pull-up circuit includes resistance R55, resistance R51, resistance R52 and electric capacity C28；Positive source passes through resistance R51 and resistance R52 ground connection, is connect the in-phase end of operational amplifier between resistance R51 and resistance R52 by resistance R55；Electric capacity C28 is in parallel with resistance R52.
Laser pickoff the most according to claim 1, it is characterised in that: described shaping circuit includes voltage comparator T4, resistance R63, resistance R64, resistance R65 and electric capacity C35；
The output (OUT4) of third level amplifying circuit connects the in-phase end of voltage comparator T4；Positive source connects the out-phase end of voltage comparator T4 by serial resistance R63, voltage comparator T4 out-phase end also by resistance R64 and electric capacity C35 and circuit ground, connected by resistance R65 at the outfan of voltage comparator T4 and draw power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620344522.8U CN205582172U (en) | 2016-04-24 | 2016-04-24 | Laser receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620344522.8U CN205582172U (en) | 2016-04-24 | 2016-04-24 | Laser receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205582172U true CN205582172U (en) | 2016-09-14 |
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ID=56860971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620344522.8U Expired - Fee Related CN205582172U (en) | 2016-04-24 | 2016-04-24 | Laser receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205582172U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440780A (en) * | 2019-06-21 | 2019-11-12 | 西安德讯威光电测控技术有限公司 | A kind of big bandwidth, miniaturization laser gyro preamplifier |
-
2016
- 2016-04-24 CN CN201620344522.8U patent/CN205582172U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440780A (en) * | 2019-06-21 | 2019-11-12 | 西安德讯威光电测控技术有限公司 | A kind of big bandwidth, miniaturization laser gyro preamplifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Tianhe District Ji Road 510663 Guangdong street listen new city of Guangzhou Province, No. 8 building two floor 4214K1 room 4 Patentee after: Guangzhou Xiao Gu Chuanqi Communication Technology Co Ltd Address before: Tianhe District Ji Road 510663 Guangdong street listen new city of Guangzhou Province, No. 8 building two floor 4214K1 room 4 Patentee before: Guangzhou Granville Communications Engineering Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160914 Termination date: 20200424 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |