CN111812665A - Pulse and phase integrated laser ranging device - Google Patents
Pulse and phase integrated laser ranging device Download PDFInfo
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- CN111812665A CN111812665A CN202010683278.9A CN202010683278A CN111812665A CN 111812665 A CN111812665 A CN 111812665A CN 202010683278 A CN202010683278 A CN 202010683278A CN 111812665 A CN111812665 A CN 111812665A
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- speed comparator
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- 238000005259 measurement Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 5
- 238000004026 adhesive bonding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Classifications
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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
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
- G01S17/14—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves wherein a voltage or current pulse is initiated and terminated in accordance with the pulse transmission and echo reception respectively, e.g. using counters
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention discloses a pulse and phase integrated laser ranging device which comprises a control unit, a pulse driving unit, a laser transmitter, a laser receiver, a beam splitter prism, a display unit, an ocular lens, a photoelectric converter, an operational amplifier A, PIN detector, an operational amplifier B, a two-way high-speed comparator and a pulse timing unit, wherein pulse laser light emitted by the laser generator is reflected to the beam splitter prism through a target to be measured, one path of pulse laser light is incident to the ocular lens, the other path of pulse laser light is incident to the laser receiver, and the photoelectric converter is connected with the two-way high-speed comparator through the operational amplifier A; the laser generator sends pulse laser to enter the PIN detector, the PIN detector is connected with the double-path high-speed comparator through the operational amplifier B, the double-path high-speed comparator is connected with the pulse timing unit, and the pulse timing unit is connected with the control unit. The invention utilizes the mode of combining the pulse ranging and the phase ranging, so that the product can measure the distance with high precision, and the invention has convenient operation and simple use.
Description
Technical Field
The invention relates to a laser ranging device, in particular to a pulse and phase integrated laser ranging device.
Background
The common laser range finder measures long distance, generally can measure one thousand to two kilometers, it is farther even, also measure closely, generally within tens meters, also within several meters, the range finding principle that laser range finder is used often contains pulse range finding, phase range finding and triangle method range finding etc. pulse range finding utilizes the propagation flight time of transmitted light and received light to calculate the detection distance, phase range finding utilizes the phase difference that takes place when detecting transmitted light and reverberation and propagate in the space to detect the distance, triangle method range finding utilizes the geometric principle of light, calculate the detection distance according to the position on the photosensitive element of the facula that the testee reflected back. In actual use, different ranging products are selected according to different application requirements, but the ranging requirements of one product on the distance between far and near cannot be met.
Therefore, a need still exists in the art for a pulse and phase integrated laser ranging device.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the pulse and phase integrated laser ranging device, and the product can measure short distance and long distance with high precision by combining the pulse ranging and the phase ranging, and is convenient to operate and simple to use.
In order to solve the technical problem, the invention is solved by the following technical scheme:
a pulse and phase integrated laser distance measuring device comprises a control unit, a pulse driving unit, a laser transmitter, a laser receiver, a beam splitter prism, a display unit, an ocular, a photoelectric converter, an operational amplifier A, PIN detector, an operational amplifier B, a two-way high-speed comparator and a pulse timing unit, wherein the control unit is connected with the laser transmitter through the pulse driving unit, one path of pulse laser light emitted by the laser generator is reflected to the beam splitter prism through a target to be measured and is divided into two paths through the beam splitter prism, one path of pulse laser light is incident to the ocular through the display unit, the other path of pulse laser light is incident to the laser receiver, the laser receiver is connected with the photoelectric converter, the photoelectric converter is connected with the double-path high-speed comparator through the operational amplifier A, and an echo signal is sent to the double-path high-speed comparator; another way pulse laser that laser generator sent incides to the PIN detector, the PIN detector passes through operational amplifier B with the high-speed comparator of double-circuit links to each other, with reference signal send to the high-speed comparator of double-circuit, the high-speed comparator of double-circuit with pulse timing unit links to each other, pulse timing unit with the control unit links to each other, the control unit with the display element links to each other.
Preferably, the laser device further comprises a collimating lens, and pulse laser emitted by the laser emitter irradiates the target to be measured after passing through the collimating lens.
Preferably, the beam splitting prism comprises a first triangular prism, a second triangular prism and a third triangular prism, wherein the first triangular prism is connected with the bottom of the first trapezoidal prism in a gluing mode, and the second triangular prism is connected with the side face of the second trapezoidal prism in a gluing mode.
Preferably, the laser spectrometer further comprises a receiving lens, and the pulsed laser reflected by the target to be measured enters the beam splitting prism through the receiving lens.
Preferably, the receiving lens is a free-form lens composed of an aspherical curved lens and a toroidal lens in combination.
Preferably, the system further comprises a first frequency divider, a second frequency divider and a mixer, wherein one end of the first frequency divider and one end of the second frequency divider are connected with the control unit, the other end of the first frequency divider and the other end of the second frequency divider are connected with the mixer, and the mixer is connected with the control unit; the first frequency divider and the second frequency divider are both connected with the pulse driving unit.
The invention has the beneficial effects that:
the invention has simple structure and convenient use, can measure not only long-distance objects, but also short-distance objects, realizes the integrated measurement from short-distance high-precision measurement to long-distance measurement of products, ensures the measurement precision of the short-distance objects and the long-distance objects, improves the distance measurement capability of a distance measurement system, can realize various application requirements by one product, overcomes the defect of single application requirement of distance measurement of the previous products, and embodies the multifunction of the products.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic diagram of the optical path of the present invention.
FIG. 3 is a schematic diagram of the structure of the receiving lens of the present invention.
Wherein, in the figure,
1-a triangular prism I; 2-a trapezoidal prism; 3-a triangular prism II; 4-aspheric curved lens; 5-a toroidal lens; 6-a laser emitter; 7-a laser receiver; 8-a display unit; 9-ocular lens; 10-collimating lens.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a pulse and phase integrated laser distance measuring device, which comprises a control unit, a pulse driving unit, a laser transmitter 6, a laser receiver 7, a beam splitter prism, a display unit 8, an eyepiece 9, a photoelectric converter, an operational amplifier A, PIN, an operational amplifier B, a two-way high-speed comparator and a pulse timing unit, the control unit is connected with the laser transmitter through the pulse driving unit, one path of pulse laser light emitted by the laser generator is reflected to the beam splitter prism through a target to be measured and is divided into two paths through the beam splitter prism, one path of pulse laser light is incident to an ocular through the display unit, the other path of pulse laser light is incident to the laser receiver, the laser receiver is connected with the photoelectric converter, the photoelectric converter is connected with the two-path high-speed comparator through the operational amplifier A, and an echo signal is sent to the two-path high-speed comparator; the other path of pulse laser emitted by the laser generator is incident to the PIN detector, the PIN detector is connected with the double-path high-speed comparator through the operational amplifier B, the reference signal is sent to the double-path high-speed comparator, the double-path high-speed comparator is connected with the pulse timing unit, the pulse timing unit is connected with the control unit, and the control unit is connected with the display unit.
The laser transmitter sends out two paths of laser, one path is received by the PIN detector, and the other path is received by the laser receiver. After the PIN detector converts the received optical signals into electric signals, the reference signals are output to the two-way high-speed comparator through the operational amplifier B, and the PIN detector is used for providing timing starting signals. The laser receiver converts a received optical signal into an electric pulse signal through a photoelectric converter, then outputs an echo signal carrying time or phase information to a double-path high-speed comparator through an operational amplifier A, the double-path high-speed comparator shapes a waveform into a step signal with a steep rising edge (ns level), laser flight time intervals corresponding to a reference signal and the echo signal are measured through a subsequent pulse timing unit, finally data information is transmitted to a control unit, the distance of a target to be measured is obtained through calculation of the control unit, and the distance is displayed through a display unit.
The invention also comprises a collimating lens 10, and the pulse laser emitted by the laser emitter irradiates on the target to be measured after passing through the collimating lens.
The beam splitting prism comprises a first triangular prism 1, a second triangular prism 2 and a second triangular prism 3, wherein the first triangular prism is connected with the bottom of the first triangular prism in a gluing mode, and the second triangular prism is connected with the side face of the second triangular prism in a gluing mode. One path of reflected pulse laser penetrates through the triangular prism I1, the trapezoidal prism 2 and the triangular prism II 3 and is incident to the display unit; the other path of reflected pulse laser is reflected and transmitted by the surfaces of the triangular prism I1 and the trapezoidal prism 2 and enters the laser receiver.
The invention also comprises a receiving lens, and the pulse laser reflected by the target to be measured is incident to the beam splitting prism through the receiving lens. The receiving lens is a free-form lens composed of an aspherical curved lens 4 and a toroidal lens 5. When a long-distance target is measured, reflected measuring light enters the free-form surface combined lens as parallel light and is focused on the surface of the laser receiver through the aspheric surface curved surface lens 4, and light rays passing through the toroidal lens cannot cover the light receiving surface of the laser receiver, so that interference cannot be generated. When measuring a short distance, the reflected measuring light enters the free-form surface lens and is changed into a fan-shaped beam to cover the surface of the laser receiver through the toroidal lens. The curvature on the meridian plane is smaller, the curvature on the sagittal plane is larger, and the formed three-dimensional fan-shaped light beam covers the light receiving surface of the laser receiver, so that the measuring range is enlarged.
The invention also comprises a first frequency divider, a second frequency divider and a frequency mixer, wherein one end of the first frequency divider and one end of the second frequency divider are connected with the control unit, the other end of the first frequency divider and the other end of the second frequency divider are connected with the frequency mixer, and the frequency mixer is connected with the control unit; and the first frequency divider and the second frequency divider are both connected with the pulse driving unit. After the measurement process is started, the first frequency divider and the second frequency divider generate frequencies with fixed phase difference, and an internal reference signal is generated by the frequency mixer and sent to the control unit. Because the measuring pulse and the reference pulse have time difference on the light sensing element, a pulse sequence with periodic repeatability can be obtained within a sampling time, and the signal is finally sent back to the control unit for algorithm calculation, so that the distance of the measured target is obtained.
The invention has simple structure and convenient use, can measure not only long-distance objects, but also short-distance objects, realizes the integrated measurement from short-distance high-precision measurement to long-distance measurement of products, ensures the measurement precision of the short-distance objects and the long-distance objects, improves the distance measurement capability of a distance measurement system, can realize various application requirements by one product, overcomes the defect of single application requirement of distance measurement of the previous products, and embodies the multifunction of the products.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A pulse-collecting and phase-integrating laser distance measuring device is characterized by comprising a control unit, a pulse driving unit, a laser transmitter, a laser receiver, a beam splitter prism, a display unit, an ocular, a photoelectric converter, an operational amplifier A, PIN detector, an operational amplifier B, a two-way high-speed comparator and a pulse timing unit, wherein the control unit is connected with the laser transmitter through the pulse driving unit, one path of pulse laser light emitted by the laser generator is reflected to the beam splitter prism through a target to be measured and is divided into two paths through the beam splitter prism, one path of pulse laser light enters the ocular through the display unit, the other path of pulse laser light enters the laser receiver, the laser receiver is connected with the photoelectric converter, the photoelectric converter is connected with the two-way high-speed comparator through the operational amplifier A, sending an echo signal to the two-way high-speed comparator; another way pulse laser that laser generator sent incides to the PIN detector, the PIN detector passes through operational amplifier B with the high-speed comparator of double-circuit links to each other, with reference signal send to the high-speed comparator of double-circuit, the high-speed comparator of double-circuit with pulse timing unit links to each other, pulse timing unit with the control unit links to each other, the control unit with the display element links to each other.
2. The pulse and phase integrated laser ranging device as claimed in claim 1, further comprising a collimating lens, wherein the pulsed laser emitted by the laser emitter passes through the collimating lens and then irradiates a target to be measured.
3. The pulse-collecting and phase-integrating laser ranging device as claimed in claim 1, wherein the beam splitter prism comprises a first triangular prism, a second triangular prism and a third triangular prism, wherein the first triangular prism is bonded to the bottom of the first triangular prism, and the second triangular prism is bonded to the side of the second triangular prism.
4. The integrated pulse and phase laser distance measuring device of claim 1, further comprising a receiving lens, wherein the pulse laser reflected by the target is incident to the beam splitter prism through the receiving lens.
5. The laser range finder of claim 4, wherein the receiving lens is a free-form lens composed of an aspheric lens and a toroidal lens.
6. The integrated pulse and phase laser distance measuring device of claim 1, further comprising a first frequency divider, a second frequency divider and a mixer, wherein one end of the first frequency divider and one end of the second frequency divider are connected to the control unit, the other end of the first frequency divider and the other end of the second frequency divider are connected to the mixer, and the mixer is connected to the control unit; the first frequency divider and the second frequency divider are both connected with the pulse driving unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010683278.9A CN111812665B (en) | 2020-07-09 | 2020-07-09 | Pulse and phase integrated laser ranging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010683278.9A CN111812665B (en) | 2020-07-09 | 2020-07-09 | Pulse and phase integrated laser ranging device |
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| CN111812665A true CN111812665A (en) | 2020-10-23 |
| CN111812665B CN111812665B (en) | 2024-08-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115902833A (en) * | 2023-03-10 | 2023-04-04 | 青岛镭测创芯科技有限公司 | Hybrid Doppler laser radar and radar speed measurement system |
| CN117492021A (en) * | 2023-12-20 | 2024-02-02 | 深达威科技(广东)股份有限公司 | Dual-optical-fusion laser range finder |
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2020
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050206872A1 (en) * | 2004-03-17 | 2005-09-22 | Asia Optical Co., Inc. | Optical system for laser range finder |
| US20120176594A1 (en) * | 2009-12-29 | 2012-07-12 | Baiwen Qiao | Phase Measurement Calibrating Method And Calibrating Device Based on Liquid Crystal Light Valve Principle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115902833A (en) * | 2023-03-10 | 2023-04-04 | 青岛镭测创芯科技有限公司 | Hybrid Doppler laser radar and radar speed measurement system |
| CN117492021A (en) * | 2023-12-20 | 2024-02-02 | 深达威科技(广东)股份有限公司 | Dual-optical-fusion laser range finder |
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| CN111812665B (en) | 2024-08-23 |
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