CN103760566A - Laser ranging system - Google Patents
Laser ranging system Download PDFInfo
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- CN103760566A CN103760566A CN201410007313.XA CN201410007313A CN103760566A CN 103760566 A CN103760566 A CN 103760566A CN 201410007313 A CN201410007313 A CN 201410007313A CN 103760566 A CN103760566 A CN 103760566A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/42—Simultaneous measurement of distance and other co-ordinates
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- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention provides a laser ranging system. According to the laser ranging system, two signal generating circuits including the sine wave modulation laser drive circuit and the pulse laser drive circuit are simultaneously arranged on a transmitting module. The two circuits are connected with a laser diode through a double-pole double-throw relay so that the laser ranging system can switch between the phase method for ranging and the pulse method for ranging through control over the double-pole double-throw relay, and therefore a user can select the phase method for ranging or the pulse method for ranging through the double-pole double-throw relay according to the specific requirements for the resolution, the ranging speed and the ranging distance. According to the laser ranging system, the comprehensive laser ranging method integrating the phase method and the pulse method is adopted, the advantages of the laser phase method for ranging and the advantages of the laser pulse method for ranging are given play to, complementary advantages are achieved, the system cost is low, and adopted electronic elements are ordinary, easy to purchase and simple in optical structure.
Description
Technical field
The present invention relates to laser ranging technique field, a kind of especially resolution, test the speed, laser distance measuring system that ranging is variable.
Background technology
Phase-shift laser rangefinder method is by laser, as light source, target range to be carried out a kind of method of Accurate Measurement, and laser ranging at present mainly realizes by interferometric method, phase method, three kinds of modes of impulse method.Wherein interferometric method laser ranging is very sensitive to shaking, and is only suitable for measuring relative shift, in precision measurement shockproof, that ranging is very short, can be suitable for, and therefore this laser distance measurement method range of application is narrower, can not obtain applying comparatively widely.Impulse method laser ranging is to find range by being converted into the mode of ranging the laser pulse flight time, because generating laser can be exported in moment the laser pulse of super superpower infrared band, and lasting time of single pulse is very short, so the advantage of this distance-finding method is: very-long-range, stronger etc. without injury, antijamming capability to human body; Shortcoming is that Measurement Resolution is low.Phase laser distance measurement mode is to calculate ranging by calculating the phase differential of the measuring-signal that two frequencies are higher, generating laser transmitting be modulated visible ray, so the advantage of this distance-finding method is: Measurement Resolution is high, applying flexible; Shortcoming is: ranging is short, and single measurement speed is slower, due to what use, is visible ray, the ability that anti-visible-light disturbs.
People, carry out in the process of range finding activity, the distance of measurement is shorter, and the resolution of requirement is just higher, and the speed of range finding also requires comparatively fast, and the distance of measurement is far away, and the resolution of requirement is just lower, and the rate request of range finding is not high.Our situation of requiring in most of practical applications that Here it is.Such as, we in interior decoration or construction account, ranging generally in 100 meters, but Measurement Resolution have relatively high expectations, in millimetre-sized level; For another example, motor vehicle safety apart from the application detecting in, measuring distance is in certain scope time, Measurement Resolution requires at grade, measuring speed also requires comparatively fast, and when measuring distance is beyond certain scope, it is unimportant that the resolution of measurement just seems.In the practical application of range-finding telescope, can accomplish that closely resolution is higher, and blind area is less, this range-finding telescope just seems and more has superiority so.Therefore for laser distance measuring system, the resolution that preferably can accomplish to measure, test the speed, ranging flexibility and changeability, yet with regard to prior art, realize this mode and will make the cost of laser distance measuring system significantly raise.
Summary of the invention
The shortcoming of prior art in view of the above, the laser distance measuring system of the object of the present invention is to provide a kind of resolution, test the speed, ranging is variable.
For achieving the above object and other relevant objects, the invention provides laser distance measuring system, it comprises: transmitter module, described transmitter module comprises the sine wave formation circuit that transmits, sine wave modulation laser drive circuit, pulse laser driving circuit, dpdt relay, laser diode, diversing lens and singlechip microcontroller circuit, sine wave transmits and forms circuit and be connected with sine wave modulation laser drive circuit, described sine wave modulation laser drive circuit, pulse laser driving circuit is connected with two input ends of described dpdt relay respectively, the output terminal of described dpdt relay is connected with described laser diode, described laser diode sends light and becomes directional light through diversing lens, described singlechip microcontroller circuit is connected with described dpdt relay, the described dpdt relay of described control makes sine wave modulation laser drive circuit or pulse laser driving circuit to described laser diode transmitted signal, receiver module, the described module of accepting comprises that receiver lens, APD avalanche photodide, APD bias voltage self-mixing discharge circuit, local oscillator coupling APD bias circuit, described receipts lens are for receiving reflected light and being radiated at APD avalanche photodide, on APD avalanche photodide, be connected with APD bias voltage self-mixing discharge circuit, APD bias voltage self-mixing discharge circuit is connected with local oscillator coupling APD bias circuit, mixting circuit, the signal input part of described mixting circuit is connected with the signal output part of laser diode driver circuit, the local frequency input end of mixting circuit forms circuit with sinusoidal wave local oscillator and is connected, and described sinusoidal wave local oscillator forms circuit and is also connected with the local frequency input end of local oscillator coupling APD bias circuit, the output terminal of described mixting circuit is connected with a timing circuit by amplifier shaping circuit, and described APD bias voltage self-mixing discharge circuit is connected with described timing circuit by amplifier shaping circuit.
Preferably, described timing circuit is realized by a CPLD logical device.
Preferably, described local oscillator coupling APD bias circuit is that multiplication of voltage is boosted and local oscillator coupling APD bias circuit, described multiplication of voltage is boosted and local oscillator coupling APD bias circuit is connected with PWM buffering drive circuit, described multiplication of voltage is boosted and local oscillator coupling APD bias circuit passes through the Duty ratio control boost value of pwm signal, described multiplication of voltage is boosted and local oscillator coupling APD bias circuit is also connected with an APD bias voltage sample circuit, described APD bias voltage sample circuit is connected with described singlechip microcontroller circuit, described singlechip microcontroller circuit is connected with described CPLD logical device, described CPLD logical device is connected with described PWM buffering drive circuit, the signal that singlechip microcontroller circuit is controlled PWM buffering drive circuit according to APD bias voltage sample circuit feedback signal size by described CPLD logical device is exported.
Preferably, described sinusoidal wave local oscillator forms circuit for the sinusoidal wave local oscillator formation of buffering circuit, this signal input part that cushions sinusoidal wave local oscillator formation circuit is connected with described CPLD logical device, and described CPLD logical device output local oscillator square-wave signal forms circuit to the sinusoidal wave local oscillator of described buffering.
Preferably, described pulse laser driving circuit is also connected with a pulse laser control circuit, described pulse laser control circuit is connected with described CPLD logical device, and described CPLD logical device is controlled the pulse output frequency of described pulse laser driving circuit by described pulse laser control circuit.
Preferably, described singlechip microcontroller circuit is connected with described dpdt relay by a relay drive circuit.
Preferably, described singlechip microcontroller circuit is provided with external reset, RS232 interface and ISP interface.
Preferably, described APD bias voltage self-mixing discharge circuit is APD bias voltage self-mixing and high-accuracy discharge circuit.
As mentioned above, laser distance measuring system of the present invention has following beneficial effect: this laser distance measuring system arranges sine wave modulation laser drive circuit and two kinds of signal generating circuits of pulse laser driving circuit on transmitter module simultaneously, two circuit are connected with laser diode by dpdt relay, so just can this laser distance measuring system be transformed between ranging phase method and impulse method by controlling dpdt relay, user just can be according to concrete resolution like this, test the speed, ranging requires to find range by the range finding of dpdt relay selected phase method or impulse method.The comprehensive laser distance measurement method that the present invention adopts phase method and impulse method to unite two into one, brought into play the advantage separately of laser phase method and laser pulse method range finding, form and have complementary advantages, and system cost is lower, the electronic devices and components that use are more common, and easily, optical texture is also more succinct in buying, can be widely used in the stadimeter of building, repairs profession, can also be for golf stadimeter and field hunting stadimeter.In anticollision of motor vehicles range measurement system, also can use, can also, for robot system and industrial automation system, in military field, also can use.
Accompanying drawing explanation
The system chart of Fig. 1 embodiment of the present invention.
Fig. 2 is the principle of work schematic diagram of the embodiment of the present invention.
Embodiment
Below, by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this instructions.The present invention can also be implemented or be applied by other different embodiment, and the every details in this instructions also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.
Refer to Fig. 1.It should be noted that, the diagram providing in the present embodiment only illustrates basic conception of the present invention in a schematic way, satisfy and only show with assembly relevant in the present invention in graphic but not component count, shape and size drafting while implementing according to reality, during its actual enforcement, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may be more complicated.
As shown in Figure 1, this laser ranging instrument system comprises and mainly comprises several parts of transmitter module, receiver module and mixting circuit.Wherein transmitter module comprises that buffering and sine wave transmit and forms circuit 16, sine wave modulation laser drive circuit 4, pulse laser driving circuit 30, dpdt relay 31, power valve 21, diversing lens 22 and singlechip microcontroller circuit 1.Buffering and sine wave transmit and form circuit 16 and be connected with sine wave modulation laser drive circuit 4, sine wave modulation laser drive circuit 4, pulse laser driving circuit 30 are connected with two input ends of dpdt relay 31 respectively, the output terminal of dpdt relay 31 is connected with power valve 21, power valve 21 is light emitting diode, sends light become directional light through diversing lens 22 through this laser diode.Singlechip microcontroller circuit 1 is connected with dpdt relay 31, and dpdt relay 31 is controlled dpdt relay makes sine wave modulation laser drive circuit or pulse laser driving circuit to power valve 21 transmitted signals.
Sine wave modulation laser drive circuit 4 is phase method Laser emission driving circuits, and the signal that this circuit adopts sine wave modulation and has certain power goes driving laser power valve in Measuring Time, to send the infrared light of 905 nanometers of a period of time.Pulse laser driving circuit 30 is impulse method Laser emission driving circuits, this circuit adopts capacitance energy storage element, by the method that the energy moment (in 100 nanoseconds) being stored in high-voltage capacitance is discharged by LASER Discharge Tube, make LASER Discharge Tube in moment, send the infrared light of the high power that wavelength is 905nm (more than tens watts).Dpdt relay 31 is for switching sine wave modulation laser drive circuit 4 and pulse laser driving circuit (30), when using ranging phase method, dpdt relay 31 is connected sine wave modulation laser drive circuit 4 to power valve 21, when using pulse ranging, dpdt relay 31 make pulse laser drive circuits 30 are to power valve 21.
Sine wave modulation laser drive circuit 4 is connected with IF1 mixting circuit 13, the signal input part of IF1 mixting circuit 13 is connected with the signal output part of sine wave modulation laser drive circuit 4, and the local frequency input end of IF1 mixting circuit 13 forms circuit 15 with buffering and sinusoidal wave local oscillator and is connected.Buffering and sinusoidal wave local oscillator formation circuit 15 also boost with multiplication of voltage and the local frequency input end of local oscillator coupling APD bias circuit 8 is connected; The output terminal of IF1 mixting circuit 13 is connected with a timing circuit by amplifier shaping circuit, and this timing circuit is realized by CPLD logical device 1.From sine wave modulation laser drive circuit 4, take out that riches all the way and penetrate signal and go IF1 mixting circuit 13 to carry out down coversion to obtain emission medium-frequency signal IF1, the local frequency of IF1 mixting circuit 13 forms circuit 15 from buffering and sinusoidal wave local oscillator.
Receiver module comprises receiver lens 24, receiving tube 23, APD bias voltage self-mixing and high-accuracy discharge circuit 9, multiplication of voltage is boosted and local oscillator coupling APD bias circuit 8.Receiver lens 24 is for receiving reflected light and being radiated at receiving tube 23, receiving tube 23 adopts APD avalanche photodide, receiving tube 23 boosts with multiplication of voltage and local oscillator coupling APD bias circuit 8, multiplication of voltage boost and local oscillator coupling APD bias circuit 8 for providing APD bias voltage to receiving tube 23, multiplication of voltage is boosted and local oscillator coupling APD bias circuit 8 is also connected with APD bias voltage self-mixing and high-accuracy discharge circuit 9.9 pairs of receiving tubes of APD bias voltage self-mixing and high-accuracy discharge circuit 23 current signal that form and that transmit same frequency carries out mixing down coversion and becomes voltage signal IF2 intermediate-freuqncy signal, and carry out high-accuracy amplification, the anti-phase bias voltage of APD of this circuit boosts from multiplication of voltage and local oscillator coupling APD bias circuit 8, multiplication of voltage is boosted and local oscillator coupling APD bias circuit 8 adopts multiplication of voltage booster circuit, by regulating the dutycycle of PWM can change boost value, wherein pwm signal is from PWM buffering drive circuit 7, this multiplication of voltage is boosted and local oscillator coupling APD bias circuit 8 is also coupled to the local oscillation signal from buffering and sinusoidal wave local oscillator formation circuit 15 on APD bias voltage, APD bias voltage self-mixing and high-accuracy discharge circuit 9 have just been realized the function of mixing down coversion like this.APD bias voltage self-mixing and high-accuracy discharge circuit 9 are connected with the timing circuit in CPLD logical device 1 by amplifier shaping circuit.
As shown in Figure 1, the transmitting and receiving module that transmitter module in dotted line frame and receiver module are combined into one, realize combining closely of optical texture and power valve, receiving tube and small-signal high-frequency circuit, the degree of distortion of high frequency small-signal can effectively be reduced, guaranteed the precision of measuring.
First describe workflow and the principle of single-frequency ranging phase method below in detail.
When dpdt relay 31 is connected sine wave modulation laser drive circuit 4 to power valve 21, LASER Discharge Tube 21 work, send the infrared light of the sine wave modulation of 905nm, by diversing lens 22, becoming tuftlet parallel laser launches, the about 5mw of the luminous power left and right of LASER Discharge Tube output, because luminous power is very little, so be safe to human body.Simultaneously from sine wave modulation laser drive circuit 4, take out that riches all the way and penetrate signal and go IF1 mixting circuit 13 to carry out down coversion to obtain emission medium-frequency signal IF1, the local frequency of IF1 mixting circuit 13 forms circuit 15 from buffering and sinusoidal wave local oscillator.9 pairs of receiving tubes of APD bias voltage self-mixing and high-accuracy discharge circuit 23 current signal that form and that transmit same frequency carries out mixing down coversion and becomes voltage signal IF2 intermediate-freuqncy signal, and carry out high-accuracy amplification, the anti-phase bias voltage of APD of this circuit boosts from multiplication of voltage and local oscillator coupling APD bias circuit 8, multiplication of voltage is boosted and local oscillator coupling APD bias circuit 8 adopts multiplication of voltage booster circuit, by regulating the dutycycle of PWM can change boost value, wherein pwm signal is from PWM buffering drive circuit 7, this circuit is also coupled to the local oscillation signal from buffering and sinusoidal wave local oscillator formation circuit 15 on APD bias voltage, APD bias voltage self-mixing and high-accuracy discharge circuit 9 have just been realized the function of mixing down coversion like this.
APD bias voltage sample circuit is realized boosting from multiplication of voltage and the APD bias voltage signal of local oscillator coupling APD bias circuit 8 samples and be sent to the ADC port of singlechip microcontroller circuit 1, monolithic function obtains the actual size of APD bias voltage like this, and then the pwm control signal by CPLD logical device 2 output regulates multiplication of voltage to boost and the size of the APD bias voltage of local oscillator coupling APD bias circuit 8 outputs.10 pairs of the IF2 amplifiers IF2 intermediate-freuqncy signal from APD bias voltage self-mixing and high-accuracy discharge circuit 9 is amplified for the second time, and IF2 signal just can reach larger amplitude like this, for subsequent treatment, uses.
The active crystal oscillator of high precision 17 produce errors be less than 5ppm compared with the high-frequency square-wave signal of high stability, this signal outputs to buffering and sine wave and transmits and form circuit 16, by cushion and sine wave transmit form circuit 16 by square-wave signal after phase inverter buffering, by LC wave filter, filter higher harmonic components, become the sine wave signal of a standard, this sine wave signal outputs to sine wave modulation laser drive circuit 4, and formation transmits.The exportable local oscillator square-wave signal of CPLD logic module 2 exports buffering to and sinusoidal wave local oscillator forms circuit 15, buffering and sinusoidal wave local oscillator form circuit 15 by square-wave signal after phase inverter buffering, by LC wave filter, filter higher harmonic components, become the sine wave signal of a standard, this sine wave signal is as local oscillation signal, output to that multiplication of voltage is boosted and local oscillator coupling APD bias circuit 8 and IF1 mixting circuit 13, for mixing down coversion.
IF2 square-wave signal: the sinusoidal wave IF2 signal of the desirable amplitude of IF2 amplifier 10 output is to IF2 zero-crossing comparator shaping circuit 11, and IF2 zero-crossing comparator shaping circuit 11 output IF2 square-wave signals are to the timing circuit of CPLD logic module 2 after shaping.The sinusoidal wave IF1 signal of IF1 amplifier 5 outputs is also delivered to detecting circuit 14, the DC level signal that output and sinusoidal wave IF1 signal amplitude are directly proportional after detection carries out AD conversion to the ADC port of singlechip microcontroller circuit 1, and singlechip microcontroller recently regulates the size of APD bias voltage by the duty of the pwm signal of CPLD logic module 2 outputs according to the size of sinusoidal wave IF1 signal amplitude.
Describe again workflow and the principle of impulse method range finding below in detail.
When dpdt relay 31 make pulse laser drive circuits 30 are during to power valve 21, power valve 21 work, the moment luminous power of sending the single duration 100ns left and right of 905nm can reach the pulsed infrared light of tens watts, by diversing lens 22, becoming tuftlet parallel laser launches, because the duration of single pulse light is very short, and be the infrared light of 905nm, so this laser is safe to human body.When target object reflects 905nm infrared laser echo to receiving tube 23, the echo-pulse current signal that 9 pairs of receiving tubes of APD bias voltage self-mixing and high-accuracy discharge circuit 23 form converts pulse voltage signal to and carries out high-accuracy amplification, and the anti-phase bias voltage of APD of APD bias voltage self-mixing and high-accuracy discharge circuit 9 boosts from multiplication of voltage and local oscillator coupling APD bias circuit 8.10 pairs of the IF2 amplifiers echo-pulse voltage signal from APD bias voltage self-mixing and high-accuracy discharge circuit 9 amplifies for the second time, and echo-pulse voltage signal just can reach larger amplitude like this, for subsequent treatment, uses.
The echo-pulse voltage signal of the larger amplitude of IF2 amplifier 10 outputs is to IF2 zero-crossing comparator shaping circuit 11, and after shaping, IF2 zero-crossing comparator shaping circuit 11 output echo-pulse square-wave signals are to the timing circuit of CPLD logic module 2.The timing circuit of CPLD logic module 2 relatively transmits and the forward position of echo-pulse square-wave signal, just can draw the time that laser experiences from being transmitted into reception, the timing circuit of CPLD logic module 2 is informed singlechip microcontroller circuit 1 by this time, according to the aerial velocity of propagation of light, singlechip microcontroller circuit 1 just can calculate the distance between laser distance measuring system and target object again.Pulse laser driving circuit 30 is also connected with a pulse laser control circuit 33, pulse laser control circuit 33 is connected with CPLD logical device 2, and singlechip microcontroller circuit 1 is by the pulse output frequency of CPLD logical device 2, pulse laser control circuit 33 gating pulse laser drive circuits 33.
The external power source interface of this system adopts the mode of external 12V direct supply by 12V power input interface 18 access 12V direct supplys.12V direct current for whole system, is mainly that artificial circuit part is used through the little 5V direct current of 5V mu balanced circuit 19 output ripples.5V direct current again through the little direct current of 3.3V mu balanced circuit 20 output 3.3V ripples for the digital circuit of system partly.In a word, CPLD module 2 is responsible for implementing the detection of IF1, IF2 square-wave signal phase differential and echo pulse signal and the control function of the comparison in the forward position that transmits and transmitting, reception.Singlechip microcontroller circuit 1 is responsible for implementing the AD conversion of feedback sample signal and the function of phase place/distance conversion computing function and PERCOM peripheral communication, and in addition, external interface function is also responsible for enforcement by singlechip microcontroller circuit 1.
The comprehensive laser distance measurement method that the present invention adopts single-frequency phase method and impulse method to unite two into one, has brought into play the advantage separately that laser phase method and laser pulse method are found range, and forms and has complementary advantages.Distinguishing feature of the present invention is, according to people under various range finding situations to Measurement Resolution, test the speed and feature that the requirement of ranging changes to some extent, adopt the combination of two kinds of comparatively popular and general laser distance measurement methods, it is the combination of single-frequency phase laser distance method and pulsed laser ranging method, to reach, use a kind of range measurement system just can meet various Measurement Resolution, test the speed and the various combination requirement of ranging, so adopt the product of the method principle exploitation to have advantages of that cost performance is high, and system cost is lower, the electronic devices and components that use are more common, buying easily, optical texture is also more succinct, can be widely used in building, the stadimeter of repairs profession, can also be for golf stadimeter and field hunting stadimeter.In anticollision of motor vehicles range measurement system, also can use, can also, for robot system and industrial automation system, in military field, also can use.So the present invention has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (8)
1. a laser distance measuring system, is characterized in that, it comprises:
Transmitter module, described transmitter module comprises the sine wave formation circuit that transmits, sine wave modulation laser drive circuit, pulse laser driving circuit, dpdt relay, laser diode, diversing lens and singlechip microcontroller circuit, sine wave transmits and forms circuit and be connected with sine wave modulation laser drive circuit, described sine wave modulation laser drive circuit, pulse laser driving circuit is connected with two input ends of described dpdt relay respectively, the output terminal of described dpdt relay is connected with described laser diode, described laser diode sends light and becomes directional light through diversing lens, described singlechip microcontroller circuit is connected with described dpdt relay, the described dpdt relay of described control makes sine wave modulation laser drive circuit or pulse laser driving circuit to described laser diode transmitted signal,
Receiver module, the described module of accepting comprises that receiver lens, APD avalanche photodide, APD bias voltage self-mixing discharge circuit, local oscillator coupling APD bias circuit, described receipts lens are for receiving reflected light and being radiated at APD avalanche photodide, on APD avalanche photodide, be connected with APD bias voltage self-mixing discharge circuit, APD bias voltage self-mixing discharge circuit is connected with local oscillator coupling APD bias circuit;
Mixting circuit, the signal input part of described mixting circuit is connected with the signal output part of laser diode driver circuit, the local frequency input end of mixting circuit forms circuit with sinusoidal wave local oscillator and is connected, and described sinusoidal wave local oscillator forms circuit and is also connected with the local frequency input end of local oscillator coupling APD bias circuit;
The output terminal of described mixting circuit is connected with a timing circuit by amplifier shaping circuit, and described APD bias voltage self-mixing discharge circuit is connected with described timing circuit by amplifier shaping circuit.
2. laser distance measuring system according to claim 1, is characterized in that: described timing circuit is realized by a CPLD logical device.
3. laser distance measuring system according to claim 2, it is characterized in that: described local oscillator coupling APD bias circuit is that multiplication of voltage is boosted and local oscillator coupling APD bias circuit, described multiplication of voltage is boosted and local oscillator coupling APD bias circuit is connected with PWM buffering drive circuit, described multiplication of voltage is boosted and local oscillator coupling APD bias circuit passes through the Duty ratio control boost value of pwm signal, described multiplication of voltage is boosted and local oscillator coupling APD bias circuit is also connected with an APD bias voltage sample circuit, described APD bias voltage sample circuit is connected with described singlechip microcontroller circuit, described singlechip microcontroller circuit is connected with described CPLD logical device, described CPLD logical device is connected with described PWM buffering drive circuit, the signal that singlechip microcontroller circuit is controlled PWM buffering drive circuit according to APD bias voltage sample circuit feedback signal size by described CPLD logical device is exported.
4. laser distance measuring system according to claim 3, it is characterized in that: described sinusoidal wave local oscillator forms circuit for the sinusoidal wave local oscillator formation of buffering circuit, this signal input part that cushions sinusoidal wave local oscillator formation circuit is connected with described CPLD logical device, and described CPLD logical device output local oscillator square-wave signal forms circuit to the sinusoidal wave local oscillator of described buffering.
5. laser distance measuring system according to claim 3, it is characterized in that: described pulse laser driving circuit is also connected with a pulse laser control circuit, described pulse laser control circuit is connected with described CPLD logical device, and described CPLD logical device is controlled the pulse output frequency of described pulse laser driving circuit by described pulse laser control circuit.
6. laser distance measuring system according to claim 2, is characterized in that: described singlechip microcontroller circuit is connected with described dpdt relay by a relay drive circuit.
7. laser distance measuring system according to claim 2, is characterized in that: described singlechip microcontroller circuit is provided with external reset, RS232 interface and ISP interface.
8. laser distance measuring system according to claim 1, is characterized in that: described APD bias voltage self-mixing discharge circuit is APD bias voltage self-mixing and high-accuracy discharge circuit.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106054204A (en) * | 2016-07-26 | 2016-10-26 | 北京邮电大学 | Long distance and high accuracy oriented compound laser range finding method and system |
| CN106249227A (en) * | 2016-07-22 | 2016-12-21 | 华北水利水电大学 | A kind of mapping infrared ambulator |
| CN108646230A (en) * | 2018-05-16 | 2018-10-12 | 北京观详光电技术有限公司 | A kind of hybrid Doppler lidar and its application method |
| CN111880183A (en) * | 2020-07-28 | 2020-11-03 | 武汉大学 | Ultrasonic transducer ranging system with multiple working modes |
| US11016182B2 (en) | 2016-10-04 | 2021-05-25 | Laser Technology, Inc. | Through-the-lens, co-aligned optical aiming system for a phase-type, laser-based distance measuring device |
| CN113422645A (en) * | 2021-07-30 | 2021-09-21 | 吉林大学 | Pulse width modulation system and method |
| CN113567995A (en) * | 2021-09-28 | 2021-10-29 | 武汉普赛斯电子技术有限公司 | Laser ranging method and device |
| CN116990826A (en) * | 2023-09-26 | 2023-11-03 | 北京航空航天大学 | High dynamic precision laser phase range finder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05333151A (en) * | 1992-05-29 | 1993-12-17 | Nec Corp | Range finding device |
| EP1903302A2 (en) * | 2006-09-20 | 2008-03-26 | Hokuyo Automatic Co., Ltd. | Rangefinder |
| CN101799536A (en) * | 2010-04-02 | 2010-08-11 | 深圳市度彼电子有限公司 | Method and equipment for improving accuracy of laser distance measuring instrument |
| CN103226200A (en) * | 2013-03-22 | 2013-07-31 | 浙江理工大学 | Handheld laser ranging device |
| JP2013195117A (en) * | 2012-03-16 | 2013-09-30 | Ricoh Co Ltd | Distance measurement device |
-
2014
- 2014-01-08 CN CN201410007313.XA patent/CN103760566A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05333151A (en) * | 1992-05-29 | 1993-12-17 | Nec Corp | Range finding device |
| EP1903302A2 (en) * | 2006-09-20 | 2008-03-26 | Hokuyo Automatic Co., Ltd. | Rangefinder |
| CN101799536A (en) * | 2010-04-02 | 2010-08-11 | 深圳市度彼电子有限公司 | Method and equipment for improving accuracy of laser distance measuring instrument |
| JP2013195117A (en) * | 2012-03-16 | 2013-09-30 | Ricoh Co Ltd | Distance measurement device |
| CN103226200A (en) * | 2013-03-22 | 2013-07-31 | 浙江理工大学 | Handheld laser ranging device |
Non-Patent Citations (5)
| Title |
|---|
| 万小强: "基于AD500型APD的激光测距硬件电路的研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
| 任晓东 等: "宽动态范围连续可调APD高压偏压电路", 《北京石油化工学院学报》 * |
| 叶云燕: "低噪声APD偏置电源的设计", 《电源世界》 * |
| 赵希 等: "一种高性能APD反向偏压控制电路的实现", 《吉林工程技术师范学院学报》 * |
| 郭永帅 等: "基于DSP的雪崩光电二极管数控偏压源设计", 《工业控制计算机》 * |
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| CN106054204A (en) * | 2016-07-26 | 2016-10-26 | 北京邮电大学 | Long distance and high accuracy oriented compound laser range finding method and system |
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| CN113567995A (en) * | 2021-09-28 | 2021-10-29 | 武汉普赛斯电子技术有限公司 | Laser ranging method and device |
| CN113567995B (en) * | 2021-09-28 | 2021-12-21 | 武汉普赛斯电子技术有限公司 | Laser ranging method and device |
| CN116990826A (en) * | 2023-09-26 | 2023-11-03 | 北京航空航天大学 | High dynamic precision laser phase range finder |
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