CN209590275U - Pulse type laser range-measurement system - Google Patents
Pulse type laser range-measurement system Download PDFInfo
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- CN209590275U CN209590275U CN201920074564.8U CN201920074564U CN209590275U CN 209590275 U CN209590275 U CN 209590275U CN 201920074564 U CN201920074564 U CN 201920074564U CN 209590275 U CN209590275 U CN 209590275U
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Abstract
The utility model discloses a kind of pulse type laser range-measurement systems, including emitter, reception device, optical routing device and data processing equipment；Emitter emits Gaussian pulse signal to object；Optical routing device is arranged between emitter and object, handles the Gaussian pulse signal of emitter transmitting, so that the portion of energy of single Gaussian pulse signal enters interior optical path, portion of energy enters outer optical path；Reception device receives the second echo signal after being reflected in first echo signal and outer optical path in interior optical path by object；Data processing equipment calculates testing distance according to the time difference for receiving first echo signal and second echo signal.It the use of Gaussian pulse signal that is continuous in time domain, being superimposed on frequency domain is ranging lightwave signal, it can reduce ranging cost and design complexities under the premise of ensuring range accuracy and accuracy, pulse is sent, the received mode of pulse can reduce the difficulty to parts selection.
Description
Technical field
The utility model relates to electro-optical distance measurement fields, and in particular to a kind of pulse type laser range-measurement system.
Background technique
Phase laser distance measurement is the laser beam irradiation measured target object with modulation, and laser beam is anti-through measured target object
It turns back after penetrating, the phase change generated in laser beam two-way process is converted into the distance of measured target object, the standard of measurement
True property and precision are influenced by ranging internal system component characteristics, such as fever, ambient temperature and humidity and the photoelectricity of photoelectric device
Influence of the aging of device to photoelectric device performance causes device to generate phase drift etc. in turn.In order to solve phase type Laser Measuring
The technical issues of aging and ambient temperature and humidity away from middle photoelectric device influence the measuring precision and accuracy, Chinese patent is public
It accuses in number patent document for being CN204044355U, CN102540170B and discloses the inside and outside optical path of laser ranging, emitter
The light wave of transmitting is received device through interior optical path by light path switching device switching rear portion and receives, and another part is through tested mesh
It turns back after mark object reflection and is received device second and receives, the time difference of reception device receives echo-signal twice has excluded system
The influence of error, the aging of photoelectric device and ambient temperature and humidity to system.The light wave as used in phase laser distance measurement is
Sine wave, so that reception device must configure two, is respectively used to receive interior optical path since sine wave cannot be superimposed in frequency
Echo-signal and outer optical path echo-signal, and so on photoelectric conversion device must also configure two, form single-emission and double-receiving
Or double double range-measurement systems received of hair, structure is complicated, it is at high cost to build, on the other hand, the consistency of two reception devices, two photoelectricity
The consistency of conversion equipment is required to very high, could eliminate because of inherent parameters difference bring common mode phase error, to device
Type selecting put forward higher requirements again.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of pulse type laser range-measurement systems, are ensuring range accuracy
With can reduce ranging cost and design complexities under the premise of accuracy, pulse is sent, the received mode of pulse can
Reduce the difficulty to parts selection.
In order to solve the above-mentioned technical problem, the utility model provides a kind of pulse type laser range-measurement system, including transmitting
Device, reception device, optical routing device and data processing equipment；The emitter is used for laser ranging to object transmitting
Gaussian pulse signal；The optical routing device is arranged between emitter and object, the optical routing device pair
The Gaussian pulse signal of emitter transmitting is handled so that the portion of energy of single Gaussian pulse signal enter interior optical path,
Portion of energy enters outer optical path；The reception device receives first echo signal and Gauss of the Gaussian pulse signal in interior optical path
Pulse signal reflected in outer optical path by object after second echo signal；The data processing equipment is returned according to reception first
The time difference of wave signal and second echo signal calculates testing distance.
It further comprise the timing the system also includes time set in one preferred embodiment of the utility model
Device record is emitted to time interval T1 that first echo signal is received from Gaussian pulse signal and sends out from Gaussian pulse signal
It is mapped to the time interval T2 that second echo signal is received.
In one preferred embodiment of the utility model, further comprise the optical routing device be half-reflecting half mirror.
In one preferred embodiment of the utility model, further comprise the emitter be pulse type laser diode.
The pulse type laser range-measurement system of the utility model, by that can be folded on continuous, frequency domain in emitter transmitting time domain
The Gaussian pulse signal added be used for laser ranging, by measure light wave be issued to echo be received between time difference come measure hair
The distance between injection device and object.It the use of Gaussian pulse signal that is continuous in time domain, being superimposed on frequency domain is ranging light
Wave signal receives the echo-signal in interior optical path and outer optical path sequentially in the same reception device, with this
Ensure to can reduce ranging cost and design complexities under the premise of range accuracy and accuracy, pulse is sent, pulse connects
The mode of receipts can reduce the difficulty to parts selection.
Detailed description of the invention
Fig. 1 is the structural block diagram of pulsed laser ranging system in the preferred embodiment in the utility model；
Fig. 2 is the structural schematic diagram of the Gaussian pulse signal for laser ranging.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, so that those skilled in the art
The utility model may be better understood and can be practiced, but illustrated embodiment is not as the restriction to the utility model.
Embodiment
As shown in Figure 1, present embodiment discloses a kind of pulse type laser range-measurement system, including emitter, reception device,
Optical routing device, data processing equipment and time set, optical routing device setting emitter and measured target object it
Between.In the present embodiment technical solution, it is preferable to use pulse type laser diode, pulse type laser diodes to exist for above-mentioned emitter
Emit Gaussian pulse signal as shown in Figure 2 under the driving of laser driver；Above-mentioned reception device it is preferable to use photodiode,
Electric signal is converted into after receiving optical signal.It is preferable to use half-reflecting half mirrors for above-mentioned optical routing device, expose to half-reflecting half mirror
On signal portions expose to measured target object through mirror surface, device reception is received after being partially specularly reflected.
Above-mentioned emitter emits Gaussian pulse signal as shown in Figure 2, the height of emitter transmitting to measured target object
This pulse signal has the characteristic that can continuously, on frequency domain be superimposed in time domain.
The Gauss that the optical routing device being arranged between above-mentioned emitter and measured target object emits emitter
Pulse signal is handled, so that single Gaussian pulse signal section enters interior optical path, partially enters outer optical path；It needs to infuse herein
Meaning, optical routing device handle Gaussian pulse signal, so that the portion of energy of single Gaussian pulse signal is by light
Road selection device is reflected into interior optical path, and portion of energy enters outer optical path through optical routing device.
Above-mentioned reception device receives first echo signal and Gaussian pulse signal of the Gaussian pulse signal in interior optical path and exists
Second echo signal after being reflected in outer optical path by object；
Above-mentioned time set record is emitted to first echo signal from Gaussian pulse signal and is received the device received time
It is spaced T1 and is emitted to second echo signal from Gaussian pulse signal and be received the received time interval T2 of device.
Above-mentioned data processing equipment calculates testing distance D according to formula one:
Wherein, C is the light velocity.
Portion of energy is received device into interior optical path and receives for the first time after single Gaussian pulse signal issues, portion of energy
Measured target object is exposed into outer optical path, second of device is received after the reflection of measured target object and is received, time set note
The time difference Δ t (=T2-T1) for recording reception device first time receives echo-signal and second of receives echo-signal, according to formula
The distance of Δ t2*c calculating measured target object.
In the present embodiment technical solution, by optical path and outer optical path in designing, systematic error, photoelectric device can be excluded
The influence of aging and ambient temperature and humidity to range-measurement system, it is ensured that the range accuracy and accuracy of laser ranging.
On the other hand, use Gaussian pulse signal as the lightwave signal of laser ranging, Gaussian pulse signal is in the time domain
The characteristic that can be superimposed with continuity, on frequency domain, so that pulse type laser range-measurement system is the range-measurement system that single-shot list is received,
Compared to conventional phase formula laser ranging system, can reduce under the premise of ensuring precision of laser ranging and accuracy ranging at
This and design complexities, pulse transmission, the received mode of pulse can reduce the difficulty to parts selection.
Embodiment described above is only preferred embodiments for fully illustrating the utility model, the utility model
Protection scope it is without being limited thereto.Those skilled in the art made equivalent substitute or change on the basis of the utility model
It changes, both is within the protection scope of the present invention.The protection scope of the utility model is subject to claims.
Claims (4)
1. a kind of pulse type laser range-measurement system, it is characterised in that: including emitter, reception device, optical routing device and
Data processing equipment；The emitter is used for the Gaussian pulse signal of laser ranging to object transmitting；The optical path selection
Device is arranged between emitter and object, the Gaussian pulse signal that the optical routing device emits emitter into
Row processing, so that the portion of energy of single Gaussian pulse signal enters interior optical path, portion of energy enters outer optical path；The reception dress
Set receive Gaussian pulse signal in interior optical path first echo signal and Gaussian pulse signal it is anti-by object in outer optical path
Second echo signal after penetrating；The data processing equipment is according to the time difference for receiving first echo signal and second echo signal
Value calculates testing distance.
2. pulse type laser range-measurement system as described in claim 1, it is characterised in that: the system also includes time set,
Time set record from Gaussian pulse signal is emitted to time interval T1 that first echo signal is received and from Gauss arteries and veins
It rushes signal and is emitted to the time interval T2 that second echo signal is received.
3. pulse type laser range-measurement system as described in claim 1, it is characterised in that: the optical routing device is half anti-half
Lens.
4. pulse type laser range-measurement system as described in claim 1, it is characterised in that: the emitter is pulse type laser
Diode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920074564.8U CN209590275U (en) | 2019-01-17 | 2019-01-17 | Pulse type laser range-measurement system |
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| CN201920074564.8U CN209590275U (en) | 2019-01-17 | 2019-01-17 | Pulse type laser range-measurement system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633672A (en) * | 2019-01-17 | 2019-04-16 | 杜鑫 | Pulse type laser range-measurement system and its distance measuring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633672A (en) * | 2019-01-17 | 2019-04-16 | 杜鑫 | Pulse type laser range-measurement system and its distance measuring method |
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