CN103457552A - Amplification circuit for laser distance measuring receiving system - Google Patents
Amplification circuit for laser distance measuring receiving system Download PDFInfo
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- CN103457552A CN103457552A CN2013103869029A CN201310386902A CN103457552A CN 103457552 A CN103457552 A CN 103457552A CN 2013103869029 A CN2013103869029 A CN 2013103869029A CN 201310386902 A CN201310386902 A CN 201310386902A CN 103457552 A CN103457552 A CN 103457552A
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- 239000003990 capacitor Substances 0.000 claims abstract description 34
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Abstract
The invention relates to an amplification circuit for a laser distance measuring receiving system. A power supply VCC and a power supply VDD are respectively a positive power supply and a negative power supply for the work of an operation amplifier U1, the power supply VEE is connected with one end of a magnetic ball L1, the other end of the magnetic ball L1 is connected with one end of a resistor R1, the other end of the resistor R1 is connected with a cathode of a PIN tube D1, an anode of the PIN tube D1 is grounded, a capacitor C2 and a capacitor C3 are connected in parallel between the magnetic ball L1 and the PIN tube D1, the cathode of the PIN tube D1 is connected with one end of the capacitor C1, a resistor R2 is connected in series between the capacitor C1 and the reverse phase input end of the operation amplifier U1, the resistor R3 is connected in series between the reverse phase input end and the output end of the operation amplifier U1, one end of a resistor R4 is connected with the identical phase input end of the operation amplifier U1, and the other end of the resistor R4 is grounded. The amplification circuit is adopted for preventing the saturation phenomenon of the receiving PIN tube, and the normal work of the receiving circuit is ensured, so the function stability of the laser distance measuring system is improved.
Description
Technical field
The present invention relates to a kind of amplifying circuit, especially relate to a kind of amplifying circuit of laser ranging receiving system.
Background technology
At present, laser ranging technique has been widely used in the automobile active safety field.
LDMS mainly comprises radiating portion and receiving unit, and as shown in Figure 1, receiving unit comprises PIN pipe, amplifier, filter circuit and timing chip usually.Generally, the quantity of electric charge flow through in the PIN pipe is to be determined by the voltage difference at intensity of illumination and two ends.In the situation that sunshine is very sufficient, often occur that PIN guarantees adequate food and situation, the electric charge that flows through the PIN pipe no longer changes but a constant value, effectively AC signal has been submerged and can't have extracted, cause receiving unit effectively not work, affect the stability of systemic-function.
Summary of the invention
The present invention has designed a kind of amplifying circuit of laser ranging receiving system, the technical problem of its solution be in the situation that sunshine very sufficient, often occur that PIN guarantees adequate food and situation, effectively AC signal has been submerged, can't extract, cause receiving unit effectively not work, affect the stability of systemic-function.
In order to solve the technical problem of above-mentioned existence, the present invention has adopted following scheme:
A kind of amplifying circuit of laser ranging receiving system, comprise PIN pipe D1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, capacitor C 1, capacitor C 2, capacitor C 3, magnetic bead L1, amplifier U1, power supply VEE, power supply VCC and power vd D, it is characterized in that: power supply VCC and power vd D are respectively work positive supply and the negative supply of amplifier U1, power supply VEE connects the end of magnetic bead L1, the end of the other end connecting resistance R1 of magnetic bead L1, the negative electrode of another termination PIN pipe D1 of resistance R 1, the plus earth of PIN pipe D1, capacitor C 2 and capacitor C 3 are connected in parallel between magnetic bead L1 and PIN pipe D1, the negative electrode of PIN pipe D1 connects an end of capacitor C 1 simultaneously, resistance R 2 is serially connected between the inverting input of capacitor C 1 and amplifier U1, resistance R 3 is serially connected between the inverting input and output of amplifier U1, the in-phase input end of resistance R 4 one termination amplifier U1, other end ground connection.
The amplifying circuit of this laser ranging receiving system is compared with the amplifying circuit of traditional laser ranging receiving system, has following beneficial effect:
(1) the present invention, by means of amplifying circuit, prevents from receiving the PIN pipe and saturated situation occurs, guarantees the receiving circuit normal operation, thereby improves the functional stabilization of LDMS.
(2) circuit of the present invention is simple, is convenient to integrated.
The accompanying drawing explanation
Fig. 1 is existing LDMS receiving unit high-level schematic functional block diagram;
Fig. 2 is the amplification circuit structure schematic diagram of laser ranging receiving system of the present invention.
Embodiment
Below in conjunction with Fig. 2, the present invention will be further described:
As shown in Figure 2, this signal acquisition circuit comprises: PIN pipe D1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, capacitor C 1, capacitor C 2, capacitor C 3, magnetic bead L1, amplifier U1, power supply VEE, power supply VCC and power vd D.Wherein power supply VCC and power vd D are respectively work positive supply and the negative supply of amplifier U1, power supply VEE connects the end of magnetic bead L1, the end of the other end connecting resistance R1 of magnetic bead L1, the negative electrode of another termination PIN pipe D1 of resistance R 1, the plus earth of PIN pipe D1, capacitor C 2 and capacitor C 3 are attempted by between magnetic bead L1 and resistance R 1, the negative electrode of PIN pipe D1 connects an end of capacitor C 1 simultaneously, resistance R 2 is serially connected between the inverting input of capacitor C 1 and amplifier U1, resistance R 3 is serially connected between the inverting input and output of amplifier U1, the in-phase input end of resistance R 4 one termination amplifier U1, other end ground connection.
When the laser echo pulse signal shines PIN pipe D1, at the rising edge of echo pulse signal, PIN pipe D1 conducting gradually, the impedance meeting of PIN pipe D1 changes along with the variation of pulse power.Trailing edge at echo pulse signal, PIN pipe D1 ends gradually, and when PIN pipe D1 cut-off, power supply gives capacitor C 1 charging by resistance R 1, when PIN pipe D1 conducting, capacitor C 1 is managed the D1 electric discharge by PIN, along with the carrying out discharged and recharged, has completed the seizure to echo pulse signal, along with capacitor C 1 discharges and recharges the carrying out of action, the electrical potential difference at its two ends is also changing, and by amplifier U1, this electrical potential difference is amplified, and then obtains more being convenient to the signal of processing.
Magnetic bead L1 and capacitor C 3, capacitor C 2 are used for suppressing the noise carried from power supply VEE, resistance R 1 is current-limiting resistance, can regulate the electric current that flows through PIN pipe D1, the electric charge that flows through PIN pipe D1 can change along with the variation of light intensity, when light intensity is increased to a certain degree, the electric charge flow through in pipe can increase sharply, and this pulse signal as echo-signal is flooded by the electric charge increased gradually, occurs saturated.
The effect of capacitor C 1 is just with solving saturation problem: capacitor C 1 just has electric current to flow through in charge and discharge process, after charging process finishes, capacitor C 1 is can not be by galvanic, characteristic with " logical interchange; resistance direct current ", the background noise signal is managed by PIN the direct current signal that D1 converts to and can be intercepted by capacitor C 1, and echo pulse signal can be admitted to amplifier.
The above has carried out exemplary description to the present invention by reference to the accompanying drawings; obvious realization of the present invention is not subject to the restrictions described above; as long as the various improvement that adopted method design of the present invention and technical scheme to carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all in protection scope of the present invention.
Claims (1)
1. the amplifying circuit of a laser ranging receiving system, comprise PIN pipe D1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, capacitor C 1, capacitor C 2, capacitor C 3, magnetic bead L1, amplifier U1, power supply VEE, power supply VCC and power vd D, it is characterized in that: power supply VCC and power vd D are respectively work positive supply and the negative supply of amplifier U1, power supply VEE connects the end of magnetic bead L1, the end of the other end connecting resistance R1 of magnetic bead L1, the negative electrode of another termination PIN pipe D1 of resistance R 1, the plus earth of PIN pipe D1, capacitor C 2 and capacitor C 3 are connected in parallel between magnetic bead L1 and PIN pipe D1, the negative electrode of PIN pipe D1 connects an end of capacitor C 1 simultaneously, resistance R 2 is serially connected between the inverting input of capacitor C 1 and amplifier U1, resistance R 3 is serially connected between the inverting input and output of amplifier U1, the in-phase input end of resistance R 4 one termination amplifier U1, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310386902.9A CN103457552B (en) | 2013-08-30 | 2013-08-30 | The amplification circuit of a kind of laser ranging receiving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310386902.9A CN103457552B (en) | 2013-08-30 | 2013-08-30 | The amplification circuit of a kind of laser ranging receiving system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103457552A true CN103457552A (en) | 2013-12-18 |
| CN103457552B CN103457552B (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310386902.9A Active CN103457552B (en) | 2013-08-30 | 2013-08-30 | The amplification circuit of a kind of laser ranging receiving system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019258A (en) * | 2016-05-12 | 2016-10-12 | 常州大地测绘科技有限公司 | Laser emission driving circuit for phase-based laser rangefinders |
| CN107482900A (en) * | 2017-10-12 | 2017-12-15 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of circuit for improving DC brushless motor EMC and the blower fan using the circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4939476A (en) * | 1988-12-27 | 1990-07-03 | Crawford Ian D | Laser Rangefinder receiver preamplifier |
| US20020033937A1 (en) * | 2000-09-11 | 2002-03-21 | I-Jen Lai | Light receiving circuit of laser range finder |
| CN201226026Y (en) * | 2008-03-25 | 2009-04-22 | 武汉理工大学 | Anti-collision instrument for ranging laser |
| CN201387487Y (en) * | 2009-03-23 | 2010-01-20 | 山东交通职业学院 | Receiver circuit of laser distance meter |
| CN102323576A (en) * | 2011-05-30 | 2012-01-18 | 北京理工大学 | Gain-adjustable high-bandwidth laser receiving circuit |
-
2013
- 2013-08-30 CN CN201310386902.9A patent/CN103457552B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4939476A (en) * | 1988-12-27 | 1990-07-03 | Crawford Ian D | Laser Rangefinder receiver preamplifier |
| US20020033937A1 (en) * | 2000-09-11 | 2002-03-21 | I-Jen Lai | Light receiving circuit of laser range finder |
| CN201226026Y (en) * | 2008-03-25 | 2009-04-22 | 武汉理工大学 | Anti-collision instrument for ranging laser |
| CN201387487Y (en) * | 2009-03-23 | 2010-01-20 | 山东交通职业学院 | Receiver circuit of laser distance meter |
| CN102323576A (en) * | 2011-05-30 | 2012-01-18 | 北京理工大学 | Gain-adjustable high-bandwidth laser receiving circuit |
Non-Patent Citations (2)
| Title |
|---|
| 段斌: "汽车自动防撞系统的研究", 《中国优秀硕士学位全文数据库 工程科技II辑》, vol. 2012, no. 10, 15 October 2012 (2012-10-15), pages 035 - 265 * |
| 许亮: "基于激光测距和缓速器制动的汽车保护器设计", 《中国优秀硕士学位全文数据库 工程科技II辑》, vol. 2013, no. 2, 15 February 2013 (2013-02-15), pages 035 - 64 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019258A (en) * | 2016-05-12 | 2016-10-12 | 常州大地测绘科技有限公司 | Laser emission driving circuit for phase-based laser rangefinders |
| CN106019258B (en) * | 2016-05-12 | 2018-04-20 | 常州大地测绘科技有限公司 | Phase laser distance measurement instrument Laser emission drive circuit |
| CN107482900A (en) * | 2017-10-12 | 2017-12-15 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of circuit for improving DC brushless motor EMC and the blower fan using the circuit |
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| Publication number | Publication date |
|---|---|
| CN103457552B (en) | 2016-06-01 |
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