CN207457504U - Novel photoelectric formula rangefinder - Google Patents
Novel photoelectric formula rangefinder Download PDFInfo
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- CN207457504U CN207457504U CN201621201615.1U CN201621201615U CN207457504U CN 207457504 U CN207457504 U CN 207457504U CN 201621201615 U CN201621201615 U CN 201621201615U CN 207457504 U CN207457504 U CN 207457504U
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- illuminator
- collimation device
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Abstract
The utility model provides a kind of novel photoelectric formula rangefinder, and the rangefinder includes：Light source, the wavelength for the measurement light that the light source is sent are corresponding with the absorption line of the permanent gas having in air；Detector, the detector is used to receive through air and is converted to electric signal by the measurement light that object reflects, and send analysis module；Analysis module, the analysis module using the electric signal and obtain the gas to measure light absorption, and using it is described absorption and light path, the gas concentration C between mapping relations and obtain the distance d between rangefinder and object.The utility model has many advantages, such as that precision is high, simple in structure, inexpensive.
Description
Technical field
The utility model is related to photoelectric analysis, more particularly to novel photoelectric formula rangefinder.
Background technology
At present, laser range finder is mainly based upon pulse ranging method, and principle is：When laser range finder works, pulse is utilized
To objective emission single laser pulse or laser pulse train, counter measures laser pulse reaches target and is returned by target laser
The two-way time of receiver is returned to, thus calculates the distance of target.Ranging formula is：L=ct/2, wherein, L for measurement away from
From c is the light velocity, and t is distance measuring signal two-way time.
The principle of pulse type laser rangefinder is simple, and one-shot measurement be with regard to that can obtain monodrome distance, but major defect is：
Range accuracy is low.The accuracy representing of pulse ranging is：Wherein, L is range accuracy to L=ct/2, and t is time essence
Degree.The many because being known as of pulsed laser ranging precision are influenced, there is the time width of pulse laser, the error of clock frequency, timing
Error etc..In particular, when tested closer to the distance, because the light velocity is very fast, system requires higher to time resolution, is more easy to
Cause range error.In addition impulse method laser ranging is generally larger using solid state lasers, the volumes of instrument such as ruby, YAG.
Utility model content
To solve the deficiency in above-mentioned prior art, it is high, small new that the utility model provides a kind of precision
Type photo-electric rangefinder.
The purpose of this utility model is achieved through the following technical solutions：
A kind of novel photoelectric formula rangefinder, the rangefinder include：
Light source, the wavelength for the measurement light that the light source is sent are corresponding with the absorption line of the permanent gas having in air；
Detector, the detector are used to receive through air and are converted to electricity by the measurement light that object reflects
Signal, and send analysis module；
Analysis module, the analysis module obtain absorption of the gas to measurement light, and profit using the electric signal
With it is described absorption and light path, the gas concentration C between mapping relations and obtain the distance d between rangefinder and object.
According to above-mentioned rangefinder, it is preferable that the distance d is：
K is calibration coefficient；b0For zero point coefficient；V2fThe intensity of second harmonic signal is absorbed for gas；V1fIt is absorbed for gas
The intensity of first harmonic signal；S (T) is the temperature change function of absorption line；B (P, T) is absorption line temperature pressure compensation
Relation function.
According to above-mentioned rangefinder, it is preferable that the light source is semiconductor laser.
According to above-mentioned rangefinder, it is preferable that the gas is oxygen.
Compared with prior art, the utility model have the advantage that for：
1. range accuracy
Absorption spectroscopy techniques are creatively applied in ranging by the utility model, make use of the concentration that there is perseverance in air true
Fixed gas (such as oxygen, carbon dioxide) is to measurement light selective absorbing and gas light path and concentration dependence, spectral technique
Application considerably improve range accuracy, and ranging is from the influence of target object distance, compact-sized, small；
2. the angle between the axis of light collimation device and the optical axis of illuminator emergent light is acute angle, reduce to a certain extent
Optical noise, but also reduce collimating effect；But by rotating the light collimation device,
So that every time measurement when generate optical interference condition it is different, it is complementary relevant between optical interference noise, pass through by
The spectroscopic data multiple averaging that the optical signal of measurement carries, not only can significantly inhibit optical interference noise, but also significantly reduce
The adverse effect that the collimating effect difference band that the light collimation device being obliquely installed is brought comes；
Anti-reflection film is plated on light collimation device surface, reduces further optical noise；
The small above-mentioned light source of optical noise helps to further improve the range accuracy of the rangefinder using the light source；
3. during illuminator light extraction, using piezoelectric material (periodically micron dimension) adjustment light collimation device and
The distance between illuminator so as to eliminating the optical noise of interference fringe, further improves the rangefinder using the light source
Range accuracy
4. the angle of the optical axis of the emergent light of illuminator and the axis of light collimation device can be zero, the standard of emergent light is improved
Straight effect.
Description of the drawings
Referring to the drawings, the disclosure of the utility model will be easier to understand.Skilled addressee readily understands that
It is：These attached drawings are used only for illustrating the technical solution of the utility model, and are not intended to the protection to the utility model
Scope is construed as limiting.In figure：
Fig. 1 is the structure diagram according to the rangefinder of the utility model embodiment 1；
Fig. 2 is the structure diagram according to the light source of the utility model embodiment 1；
Fig. 3 is the structure diagram according to the light source of the utility model embodiment 2；
Fig. 4 is the structure diagram according to the light source of the utility model embodiment 4.
Specific embodiment
Fig. 1-4 and following description describe the optional embodiments of the utility model how to instruct those skilled in the art
Implement and reproduce the utility model.In order to instruct technical solutions of the utility model, simplified or some conventional aspects be omitted.This
Field technology personnel should be appreciated that modification from these embodiments or replacement will be in the scope of the utility model.This field
Technical staff should be appreciated that following characteristics can combine to form multiple modifications of the utility model in various ways.As a result, originally
Utility model is not limited to following optional embodiments, and is only limited by the claims and their equivalents.
Embodiment 1：
Fig. 1 schematically illustrates the structure diagram of the novel photoelectric formula rangefinder of the utility model embodiment, such as Fig. 1 institutes
Show, the rangefinder includes：
Light source, Fig. 2 schematically illustrate the structure diagram of the light source of the present embodiment, as shown in Fig. 2, the light source bag
It includes：
Illuminator 11, the illuminator are semiconductor laser with tunable, and the laser sends measurement light, the measurement
The wavelength of light is corresponding with the absorption line of the permanent gas such as oxygen having in air；The illuminator is fixed in first support；
First support 21, such as circular sleeve, installing plate, for carrying the illuminator, stent is formed with the stent
Suitable for the illuminator emergent light by optical channel；
Light collimation device 81, such as plate-convex lens, the light collimation device is fixed on the light path of the emergent light of the illuminator
On, collimate the emergent light；Angle between the optical axis of the axis of the light collimation device and the emergent light is acute angle, such as 2 degree,
10 degree, 25 degree etc., but no more than 30 degree；
Rotating member 31, the light collimation device are fixed on the rotating member；
Second support 61, the rotating member are rotatably arranged in the second support；
Motor 51, the motor are used to that the rotating member and light collimation device to be driven to rotate.
Detector, after the detector after the interacting with air of collimation by object for that will be reflected
Measurement light be converted to electric signal, and send analysis module；
Analysis module, the analysis module include：Averager (such as circuit), computing module (such as circuit), the averager
For the spectroscopic data that averagely described electric signal carries, computing module obtains the gas such as oxygen using the electric signal after being averaged
Gas utilizes the absorption and light path, the concentration C of the gas to measuring the absorption of light (content of oxygen in air is fixed)
Between mapping relations and obtain the distance d between rangefinder and object, be specially：
K is calibration coefficient；b0For zero point coefficient；V2fThe intensity of second harmonic signal is absorbed for gas；V1fIt is absorbed for gas
The intensity of first harmonic signal；S (T) is the temperature change function of absorption line；B (P, T) is absorption line temperature pressure compensation
Relation function.
The course of work of the above-mentioned rangefinder of the utility model embodiment, comprises the following steps：
(A1) light collimation device that the measurement light that laser is sent is rotated collimates, in the wavelength and air of the measurement light
The absorption line for the gas that perseverance has corresponds to；
(A2) detector will receive through air and be converted to electric signal by the measurement light that object reflects, and transmit
To analysis module；
(A3) spectroscopic data that the average electric signal of averager carries, computing module are obtained using the electric signal after average
The gas such as oxygen to measuring the absorption of light, and utilize the absorption and light path, the concentration C (oxygen in air of the gas
Gas content is fixed) between mapping relations and obtain the distance d between rangefinder and object, be specially：
K is calibration coefficient；b0For zero point coefficient；V2fThe intensity of second harmonic signal is absorbed for gas；V1fIt is absorbed for gas
The intensity of first harmonic signal；S (T) is the temperature change function of absorption line；B (P, T) is absorption line temperature pressure compensation
Relation function.
Embodiment 2：
The novel photoelectric formula rangefinder of the utility model embodiment, as different from Example 1：
As shown in Fig. 2, light source includes：
Illuminator 11 selects semiconductor laser with tunable；
For first support 21 using having radial component, the circular sleeve of axial component, the illuminator is fixed on the footpath
To the center of part；The part 22 of axial component is used as second support；
Rotating member 31 uses bearing, and bearing outer ring is fixed in the second support namely the inside of the axial component；
Fixing piece 41, fixing piece use sleeve, are fixed on rotating member, i.e., on the inner ring of bearing；
Light collimation device 81 uses plate-convex lens, and lens are fixed in the fixing piece, and axis and the laser of lens are sent out
The angle of optical axis of the measurement light gone out is acute angle, such as 5 degree, and lens plating is with the anti-reflection film passed through convenient for the measurement light, convex surface
Back to the laser；
Motor 51, such as the motor driven by electricity, gas, magnetic, hydraulic pressure mode for the fixing piece to be driven to rotate, make
Light collimation device rotation is obtained, but is not occurred along the displacement on measurement light optical path direction.
Embodiment 3：
The novel photoelectric formula rangefinder of the utility model embodiment, as different from Example 2：
1. not using fixing piece, light collimation device is directly anchored on the inner ring of bearing, and motor directly drives inner ring and turns
It is dynamic, utilize frictional force drives inner ring by the driving wheel of motor；
2. second support is separately provided, the outer ring of the bearing is fixed in the second support；The survey that laser is sent
Light is measured through light collimation device, and the angle between optical axis and the axis of light collimation device is acute angle, such as 10 degree, 15 degree, 20 degree, 30
Degree etc..
Embodiment 4：
The novel photoelectric formula rangefinder of the utility model embodiment, the rangefinder include：
Light source, Fig. 4 schematically illustrate the structure diagram of the light source of the present embodiment, as shown in figure 4, the light source bag
It includes：
Illuminator 11, such as semiconductor laser with tunable, the gas that there is perseverance in the wavelength and air of the measurement light sent is such as
The absorption line of oxygen corresponds to；The illuminator is fixed on stent；
Stent 7, such as circular sleeve, for carrying the illuminator, stent is formed with suitable for the illuminator stent
Emergent light by optical channel；
Fixing piece 9, if one end has the circular sleeve of radial component, the fixing piece sets on the bracket, is suitable for
The emergent light passes through；By thread fitting between fixing piece and stent, realize detachable；
Light collimation device 4, such as convex lens, the light collimation device is fixed in the light path of the emergent light, suitable for collimation
The emergent light；
Elastic component 5, such as rubber parts, the elastic component be arranged on the light collimation device along the side on its axis direction
Portion；
Piezoelectric device 3, such as piezoelectric ceramics, the piezoelectric device and elastic component are separately positioned on the edge of the light collimation device
The both sides of its axis direction, the light collimation device, elastic component and piezoelectric device are constrained between the stent and fixing piece,
So that when piezoelectric device is subjected to displacement, the light collimation device moves back and forth therewith, so as to constantly adjust illuminator and light
The distance between collimating element；
Detector, after the detector after the interacting with air of collimation by object for that will be reflected
Measurement light be converted to electric signal, and send analysis module；
Analysis module, such as circuit, the analysis module obtain the gas such as oxygen using the electric signal to measurement
The absorption of light, and using it is described absorption and light path, the gas concentration C (content of oxygen in air is fixed) between mapping
Relation and obtain the distance d between rangefinder and object, be specially：
K is calibration coefficient；b0For zero point coefficient；V2fThe intensity of second harmonic signal is absorbed for gas；V1fIt is absorbed for gas
The intensity of first harmonic signal；S (T) is the temperature change function of absorption line；B (P, T) is absorption line temperature pressure compensation
Relation function.
The course of work of the above-mentioned rangefinder of the utility model embodiment, comprises the following steps：
(A1) emergent light that laser is sent passes through optical channel；Emergent light is collimated by light collimation device；Going out after collimation
Light is penetrated to project from fixing piece；
In above process, piezoelectric device generates displacement so that the light collimation device translates back and forth；
(A2) detector will receive through air and be converted to electric signal by the measurement light that object reflects, and transmit
To analysis module；
(A3) analysis module obtains the gas such as oxygen using the electric signal to measuring the absorption of light, and utilizes institute
It states the mapping relations between the concentration C (content of oxygen in air is fixed) of absorption and light path, the gas and obtains rangefinder
Distance d between object, specially：
K is calibration coefficient；b0For zero point coefficient；V2fThe intensity of second harmonic signal is absorbed for gas；V1fIt is absorbed for gas
The intensity of first harmonic signal；S (T) is the temperature change function of absorption line；B (P, T) is absorption line temperature pressure compensation
Relation function.
Embodiment 5：
According to the application examples of the rangefinder of the utility model embodiment 4.
As shown in figure 4, in the application examples, illuminator 11 selects semiconductor laser with tunable；The stent 7 is using circle
Shape sleeve, the outer diameter for facing one end 72 of fixing piece are smaller (compared with the outer diameter of one end for facing illuminator of stent) but interior
Footpath is larger (compared with the internal diameter of one end for facing illuminator of stent), so as to form ring-shaped step in inside, and with outer spiral shell
Line, it is larger to face the outer diameter of one end 71 of illuminator, but internal diameter is smaller；The outer diameter larger one that the illuminator 11 is fixed on stent
The end at end；Fixing piece 9 has the circular sleeve of radial component 92 using one end, has internal thread in the sleeve, outside described
Screw thread matches；Piezoelectric device 3 uses piezoelectric ceramics, is symmetrically dispersed on the ring-shaped step, the cable of piezoelectric device passes through
Stent, the amplitude micron dimension of piezoelectric ceramics, resonant frequency is up to hundreds of kHz；Pressure along on laser emitting light direction
The one side back to step of electrical part is equipped with light collimation device 4, using plate-convex lens, the axis of lens and the optical axis of emergent light
Between angle be zero, lens are coated with the anti-reflection film passed through convenient for the laser emitting light, and convex surface is back to the laser；Elastic component
5 use rubber material, such as O-ring, and the piezoelectric device, light collimation device and elastic component are in the stent with being arranged in order
The inside of internal diameter smaller portions, in the light path in laser emitting light；The axial component 91 of fixing piece is sleeved on the stent
The outside of outer diameter smaller portions, radial component 92 stop elastic component so that on the direction along laser emitting light, piezoelectricity device
Part, light collimation device and elastic component are compressed between stent and fixing piece.
The working method of above-mentioned light source is：
The laser that laser is sent passes through the optical channel in stent；
Emergent light is collimated by plate-convex lens；
Emergent light after collimation is projected from fixing piece；
In above process, piezoelectric ceramics generates displacement so that plate-convex lens translate back and forth, constantly adjust laser
The distance between lens (but the optical axis of laser and the angle of lens axis remain as zero), eliminate between laser and lens
Due to interference generate optical noise.
Embodiment 6：
According to the application examples of the rangefinder of the utility model embodiment 4, as different from Example 5：
Face the internal diameter smaller portions of laser 1. stent has, face the internal diameter major part of fixing piece, internal diameter is larger
Partial inside has internal thread；
Match with the stent, fixing piece has external screw thread；
2. along on the outgoing light direction of laser, elastic component, light collimation device and piezoelectric device are sequentially arranged in fixation
It on the inside of part, and is squeezed by step and fixing piece, so as to which when piezoelectric device has displacement, light collimation device moves back and forth.
Claims (7)
1. a kind of novel photoelectric formula rangefinder, it is characterised in that：The rangefinder includes：
Light source, the wavelength for the measurement light that the light source is sent are corresponding with the absorption line of the permanent gas having in air；
Detector, the detector are used to receive through air and are converted to telecommunications by the measurement light that object reflects
Number, and send analysis circuit；
Analysis circuit, the analysis circuit obtains the gas using the electric signal to measuring the absorption of light, and utilizes institute
It states the mapping relations between the concentration C of absorption and light path, the gas and obtains the distance d between rangefinder and object：
K is calibration coefficient；b0For zero point coefficient；V2fThe intensity of second harmonic signal is absorbed for gas；V1fIt is absorbed once for gas
The intensity of harmonic signal；S (T) is the temperature change function of absorption line；B (P, T) is absorption line temperature pressure compensation relation
Function.
2. rangefinder according to claim 1, it is characterised in that：The light source is semiconductor laser.
3. rangefinder according to claim 1, it is characterised in that：The gas is oxygen.
4. rangefinder according to claim 1, it is characterised in that：The light source includes：
Illuminator, the illuminator are fixed on stent；
Stent, the stent for carrying the illuminator, stent be formed with suitable for the illuminator emergent light by optics
Passage；
Fixing piece, the fixing piece set on the bracket, are passed through suitable for the emergent light；
Light collimation device, the light collimation device are fixed in the light path of the emergent light, suitable for collimating the emergent light；
Elastic component, the elastic component be arranged on the light collimation device along the side on its axis direction；
Piezoelectric device, the piezoelectric device and elastic component be separately positioned on the light collimation device along the two of its axis direction
Side, the light collimation device, elastic component and piezoelectric device are constrained between the stent and fixing piece.
5. rangefinder according to claim 1, it is characterised in that：The light source includes：
Illuminator, the illuminator are fixed on stent；
First support, the first support are used to carry the illuminator；
Light collimation device, the light collimation device are fixed in the light path of the emergent light of the illuminator, collimate the emergent light；
Angle between the optical axis of the axis of the light collimation device and the emergent light is acute angle；
Rotating member, the light collimation device are fixed on the rotating member；
Second support, the rotating member are rotatably arranged in the second support；
Motor, the motor are used to that the rotating member and light collimation device to be driven to rotate；
The analysis module includes：
Averager, the spectroscopic data entrained by electric signal that the averager comes for the average detector transmission, send afterwards
Computing module；
Computing module, the computing module obtain the gas to measuring light using the electric signal after spectral technique processing averagely
Absorption, and using it is described absorption and light path, the gas concentration C between mapping relations and obtain between rangefinder and object
Distance d.
6. rangefinder according to claim 5, it is characterised in that：The acute angle is less than 30 degree.
7. rangefinder according to claim 5, it is characterised in that：The light source further comprises：
Fixing piece, the light collimation device are arranged on the fixing piece, and the fixing piece is arranged on the rotating member；It is described
Motor drives the fixing piece to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621201615.1U CN207457504U (en) | 2016-11-08 | 2016-11-08 | Novel photoelectric formula rangefinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621201615.1U CN207457504U (en) | 2016-11-08 | 2016-11-08 | Novel photoelectric formula rangefinder |
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| Publication Number | Publication Date |
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| CN207457504U true CN207457504U (en) | 2018-06-05 |
Family
ID=62245622
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621201615.1U Active CN207457504U (en) | 2016-11-08 | 2016-11-08 | Novel photoelectric formula rangefinder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597457A (en) * | 2016-11-08 | 2017-04-26 | 上海禾赛光电科技有限公司 | Spectrum technology-based distance measuring instrument and distance measuring method |
| CN111077530A (en) * | 2019-12-17 | 2020-04-28 | 北京缔科新技术研究院(有限合伙) | Light quantum distance meter with air component measuring function |
-
2016
- 2016-11-08 CN CN201621201615.1U patent/CN207457504U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597457A (en) * | 2016-11-08 | 2017-04-26 | 上海禾赛光电科技有限公司 | Spectrum technology-based distance measuring instrument and distance measuring method |
| CN111077530A (en) * | 2019-12-17 | 2020-04-28 | 北京缔科新技术研究院(有限合伙) | Light quantum distance meter with air component measuring function |
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