CN113791401A - Method for verifying distance measuring capability of laser distance measuring machine - Google Patents
Method for verifying distance measuring capability of laser distance measuring machine Download PDFInfo
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- CN113791401A CN113791401A CN202111057584.2A CN202111057584A CN113791401A CN 113791401 A CN113791401 A CN 113791401A CN 202111057584 A CN202111057584 A CN 202111057584A CN 113791401 A CN113791401 A CN 113791401A
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- 238000012360 testing method Methods 0.000 claims abstract description 79
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- 230000000694 effects Effects 0.000 claims description 4
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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
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Abstract
The invention discloses a method for verifying the distance measuring capability of a laser distance measuring machine, which comprises the following steps: a transmitting end in the laser range finder transmits a first laser pulse, and the first laser pulse is received by a receiving system after being reflected for multiple times; after receiving the first laser pulse signal, the receiving system controls the long-distance test transmitting system or the short-distance test transmitting system to transmit laser pulses with the power being a set value after a set time delay, and the laser pulses are received by a receiving end in the laser range finder after being reflected for multiple times; the laser distance measuring machine feeds back the measured value, and the distance measuring capability of the laser distance measuring machine can be obtained according to the existence and the size of the measured value. The invention greatly reduces the field required by the test, ensures that the distance measuring capability verification of the laser distance measuring machine can be carried out indoors and is not influenced by outdoor aiming precision, field, weather, atmospheric visibility and the like, thereby improving the production efficiency.
Description
Technical Field
The invention relates to the technical field of distance measuring machine performance testing, in particular to a method for verifying distance measuring capability of a laser distance measuring machine.
Background
The laser range finder has the advantages of small volume, simple operation, high measurement precision and the like, and is widely applied to various aspects such as military, scientific technology, production, construction and the like. At present, when the measuring distance of a laser distance measuring machine is verified, a simulated target needs to be established outdoors by selecting proper weather, then the target is measured, and if the detected distance is consistent with the actual distance, the verification is qualified. The direct range finding ability of verifying to the target of laser range finder receives many-sided influence and restriction such as aiming accuracy, place, weather, atmospheric visibility, is difficult for verifying at any time, verifies inefficiency, can lead to the acceptance of laser range finder, deliver and receive the influence to influence production efficiency.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method for verifying the distance measuring capability of a laser distance measuring machine, which greatly reduces the field required by the test, ensures that the verification of the distance measuring capability of the laser distance measuring machine can be carried out indoors and is not influenced by outdoor aiming precision, field, weather, atmospheric visibility and the like, and further improves the production efficiency;
the technical scheme adopted by the invention for solving the technical problems is as follows: a method for verifying the distance measurement capability of a laser distance measuring machine comprises the following steps:
the method comprises the following steps: installing a laser range finder, a receiving system and a remote test transmitting system;
step two: the transmitting end of the laser range finder transmits a first laser pulse to a receiving system;
step three: after the receiving system receives the first laser pulse signal, the intensity of the received first laser pulse signal is taken as a reference, the preset transmitting power is gradually reduced in a set second delay period according to the attenuation amplitude in the laser pulse propagation process so as to simulate the attenuation of the first laser pulse signal within a certain distance, the remote test transmitting system is controlled to transmit a second laser pulse to the laser range finder according to the reduced preset transmitting power, and whether the distance ranging can meet the ranging requirement of the simulated distance is judged according to whether the laser range finder feeds back a distance measurement value or not;
step four: and adjusting the set value of the second delay, and repeating the second step and the third step until the maximum measuring range of the laser distance measuring machine is determined.
Has the advantages that: through multiple reflections of laser pulses and set time delay, the field required by the test is greatly reduced; meanwhile, the distance measuring capability verification of the laser distance measuring machine can be carried out indoors and is not influenced by outdoor aiming precision, sites, weather, atmospheric visibility and the like, so that the production efficiency is improved; the power and the time delay of the laser pulse emitted by the long-distance test emission system can be adjusted, the laser ranging of different measuring ranges can be simulated, the range measurement verification coverage range is wide, and the actual maximum measuring range of the laser ranging machine can be obtained through the long-distance test emission system.
Furthermore, the receiving system comprises a photoelectric detector and a receiving circuit electrically connected with the photoelectric detector, the photoelectric detector is used for converting the received laser pulse signal into an electric signal, and the receiving circuit is electrically connected with the control system.
Further, after the second step, after the receiving system receives the first laser pulse signal, the intensity of the received first laser pulse signal is used as a reference, the predetermined transmitting power is gradually reduced during a set third delay period according to the attenuation amplitude in the laser pulse propagation process to simulate the attenuation of the first laser pulse signal within a certain distance, the short-distance test transmitting system is controlled to transmit a third laser pulse according to the reduced predetermined transmitting power, the third laser pulse is received by a receiving end in the laser range finder after being reflected for multiple times, the laser range finder feeds back a measured value, and the measured value is compared with an actual distance theoretical value, so that the short-distance ranging accuracy of the laser range finder can be obtained.
Has the advantages that: the accuracy of short-distance measurement of the laser distance measuring machine can be obtained through the short-distance test emission system, the measurement is convenient, and the limitation of a field is avoided.
Furthermore, a reflection assembly and a focus assembly are installed, the first laser pulse is reflected by the reflection assembly, then received by the focus assembly and reflected to the reflection assembly, and the first laser pulse reflected again by the reflection assembly is finally received by a receiving system.
Furthermore, a delay circuit and a transmitting power regulating circuit are sequentially arranged in the control system, the long-distance test transmitting system and the short-distance test transmitting system are respectively and electrically connected with the transmitting power regulating circuit, and the receiving system can drive the delay circuit to start after receiving the first laser pulse signal, so that the delay time and the power of the laser pulse transmitted by the long-distance test transmitting system or the short-distance test transmitting system can be regulated through the delay circuit and the transmitting power regulating circuit.
Has the advantages that: the delay time and the power of the laser pulse emitted by the long-distance test emission system or the long-distance test emission system can be preset through the delay circuit and the emission power adjusting circuit, and the set value is convenient to modify.
Furthermore, a comparator is arranged in the control system, the comparator is electrically connected with the delay circuit to adjust relevant parameters of the delay circuit, and the laser range finder is electrically connected with the comparator.
Has the advantages that: the comparator sends a signal to the delay circuit, the delay circuit automatically adjusts the related parameters, and the transmitting power adjusting circuit connected with the delay circuit adjusts the parameters according to the related parameters of the delay circuit, so that the delay time and the power of the laser pulse transmitted by the long-distance test transmitting system are automatically adjusted, the adjustment is convenient and accurate, and manual adjustment is not needed.
Furthermore, the reflection assembly comprises a vertical fixed support and a Newton mirror installed on the fixed support, the Newton mirror is vertically arranged, and the Newton mirror is used for reflecting the laser pulse converged thereon.
Furthermore, the focus assembly comprises a small aperture diaphragm and a total reflection mirror, and the first laser pulse is converged to the small aperture diaphragm after being reflected by the Newton mirror and then is reflected by the total reflection mirror through the small aperture diaphragm.
Furthermore, the remote test emission system comprises a driving circuit and a laser diode electrically connected with the driving circuit, the driving circuit is electrically connected with the emission power regulating circuit, and the laser diode can emit pulse laser.
Has the advantages that: the laser diode has small volume, light weight, low power consumption, simple driving circuit, convenient modulation, mechanical impact resistance and vibration resistance.
Furthermore, a first laser pulse emitted by a transmitting end in the laser range finder is reflected by the reflecting assembly after passing through the attenuation sheet, and a second laser pulse or a third laser pulse also needs to pass through the attenuation sheet before being received by a receiving end in the laser range finder, wherein the attenuation sheet is used for simulating the attenuation effect of atmosphere on laser.
Has the advantages that: the attenuation piece can simulate the attenuation effect of atmosphere on laser, and the attenuation amount can be adjusted by changing the number of the attenuation pieces, so that different measuring ranges can be simulated.
Drawings
FIG. 1 is a schematic view of the whole of an apparatus used in example 1 of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 with the hood and table legs removed;
FIG. 3 is a schematic view of a partial structure of an apparatus used in embodiment 1 of the present invention;
FIG. 4 is a schematic front view of FIG. 3;
fig. 5 is a schematic structural diagram of a receiving system according to embodiment 1 of the present invention;
FIG. 6 is a schematic structural diagram of a remote test transmission system according to embodiment 1 of the present invention;
FIG. 7 is a schematic structural view of a focus module according to embodiment 1 of the present invention;
fig. 8 is a schematic structural view of an attenuation sheet holder and an attenuation sheet cassette according to embodiment 1 of the present invention;
FIG. 9 is a schematic structural view of a reflection assembly according to embodiment 1 of the present invention;
FIG. 10 is a schematic sectional view taken along line A-A of FIG. 9;
fig. 11 is a control block diagram of a control system of embodiment 1 of the present invention;
fig. 12 is a schematic diagram of simulated laser beam emission and reception in embodiment 1 of the present invention.
The labels in the figure are: 1. the device comprises a workbench, 2, a protective cover, 3, a control panel, 4, a reflecting assembly, 41, a fixed support, 42, a mounting block, 43, a Newtonian mirror, 44, a pressing sheet, 5, a laser range finder, 6, a long-distance test emission system, 61, a driving circuit, 62, a laser diode, 63, an emission optical system, 64, an emission shell, 7, a focus assembly, 71, a total reflection mirror, 72, an aperture diaphragm, 73, a mounting seat, 74, a light emitting diode, 75, a rear cover, 8, a receiving system, 81, a receiving circuit, 82, a photoelectric detector, 83, a receiving optical system, 84, a receiving shell, 85, a light filter, 9, a short-distance test emission system, 10, an attenuation sheet box, 11, an attenuation sheet bracket, 12, an azimuth pitching platform, 13, a bracket, 14, a sighting mirror, 15, an attenuation sheet, 16 and a simulated laser beam.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the technical solutions in the embodiments of the present invention will be described below in detail with reference to the accompanying drawings. It should be noted that the described embodiments are only for illustrating the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification made to the embodiments according to the technical spirit of the present invention fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first", "second", and the like are only used for distinguishing one entity or operation from another entity or operation, and are not to be construed as implying any such relationship or order between such entities or operations. Furthermore, the terms "comprising," "including," and the like, include not only those elements recited, but also other elements not expressly listed. The terms "top," "bottom," "upper," "lower," and the like refer to an orientation or positional relationship depicted in the drawings, and do not imply a particular orientation, nor should be inferred to limit the invention.
The invention is described in further detail below with reference to the figures and the embodiments.
Example 1 of the invention:
a method for verifying the distance measuring capability of a laser distance measuring machine is disclosed, and equipment using the method is shown in figures 1-11 and comprises a support 13 for mounting the laser distance measuring machine 5, a reflection assembly 4 arranged at one side position of the support 13, a focus assembly 7, a receiving system 8, a long-distance test transmitting system 6, a short-distance test transmitting system 9, an attenuation sheet support 11 and a control panel 3.
The focus assembly 7, the receiving system 8, the distance test emission system 6 and the close test emission system 9 are all located between the support 13 and the reflection assembly 4. The reflection assembly 4 is installed on the workbench 1, the support 13, the attenuation sheet support 11, the long-distance test emission system 6, the focus assembly 7 and the receiving system 8 are sequentially installed on a bottom plate, the bottom plate is installed on the workbench 1, and a certain distance is reserved between the bottom plate and the reflection assembly 4. The control panel 3 is arranged on the bottom plate at a position close to the bracket 13, and the short-distance test transmitting system 9 is arranged on the bottom plate at a position close to the receiving system 8. The position department outside bottom plate and the reflection assembly outside on 1 upper base plate of workstation is equipped with protection casing 2 respectively, and protection casing 2 is used for protecting inner structure and avoids the collision, makes the inside cleanness that keeps of equipment, avoids the parasitic light to disturb simultaneously.
The laser range finder 5 comprises a body, a transmitting end and a receiving end, wherein the transmitting end is used for transmitting laser pulses, and the receiving end is used for receiving the laser pulses. The laser range finder 5 is connected for dismantling with the connected mode between the support 13, still is equipped with position every single move platform 12 below the support 13, and position every single move platform 12 passes through the erection support to be installed on the bottom plate, and position every single move platform 12 accessible is above that horizontal and vertical adjust knob carry out the angular adjustment of level and vertical direction to adjust the position of laser range finder 5. A viewing mirror 14 is further arranged at one side of the laser range finder 5 on the support 13, and the viewing mirror 14 is coaxial with the transmitting end of the laser range finder 5.
The attenuation piece support 11 comprises an upper mounting frame and a lower mounting frame, the upper mounting frame and the lower mounting frame are both of semicircular tubular structures, the upper mounting frame and the lower mounting frame can cover the whole semicircular tubular structure, the upper mounting frame is hinged to the lower mounting frame, and a plurality of clamping grooves of the semicircular structures are formed in the upper mounting frame and the lower mounting frame. The attenuation sheet bracket 11 is further provided with an attenuation sheet box 10, and the attenuation sheet box 10 is used for storing a plurality of attenuation sheets 15. When the attenuation sheet 15 is used, the attenuation sheet is taken out of the attenuation sheet box 10, the upper mounting frame is opened again, the attenuation sheet 15 is inserted into the clamping groove in the lower mounting frame, and then the mounting frame is covered. The attenuation sheet 15 can simulate the attenuation effect of atmosphere on laser, and the attenuation amount can be adjusted by changing the number of the attenuation sheets 15, so that different measuring ranges can be simulated.
The focus assembly 7 is used for receiving and transmitting the laser pulse reflected from the reflection assembly 4, the focus assembly 7 comprises an aperture diaphragm 72 and a total reflection mirror 71, and the specification of the aperture diaphragm 3 is phi 0.5 mm. The total reflection mirror 71 is a flat mirror, the laser of the specific laser band emitted by the laser range finder 5, the long-distance test emission system 6 and the short-distance test emission system 9 can be totally reflected by the total reflection mirror 71, and the total reflection mirror 71 can transmit white light. The aperture diaphragm 72 and the total reflection mirror 71 are both mounted on a mounting base 73, the mounting base 73 is vertically arranged on a bottom plate, a rear cover 75 is further arranged on the mounting base 73, a light emitting diode 74 is arranged in the rear cover 75, and the rear cover 75 is used for protecting the light emitting diode 74. The led 74 is used to emit light, and the white light emitted therefrom passes through the all-reflecting mirror 71, so that the aperture 72 becomes a bright spot to facilitate the alignment of the sighting telescope 14. The rear cover 75, the aperture diaphragm 72 and the total reflection mirror 71 are sequentially arranged on the mounting base 73 in the order of the aperture diaphragm 72, the total reflection mirror 71 and the rear cover 75. In the verification process, the first laser pulse emitted by the emitting end of the laser range finder 5 is reflected by the newton mirror 43 and then converged to the aperture 72, and then reflected by the total reflection mirror 71 through the aperture 72.
The receiving system 8 can receive the first laser pulse emitted from the emitting end of the laser range finder 5 after the third reflection of the reflection assembly 4, the focus assembly 7 and the reflection assembly 4, the receiving system 8 includes a receiving housing 84, a receiving circuit 81 arranged at one end of the receiving housing 84, a photodetector 82 electrically connected with the receiving circuit 81 and a receiving optical system 83 arranged in the receiving housing 84, and an optical filter 85 is further arranged at one end of the receiving housing 84 far away from the photodetector 82. The receive optics 83 shapes and focuses the first laser light pulse into the receive housing 84 so that the first laser light pulse is focused onto the photodetector 82. The photodetector 82 is an avalanche photodiode, and is configured to convert the received laser pulse signal into an electrical signal and send the electrical signal to the receiving circuit 81.
The control panel 3 is internally provided with a controller, the receiving system 8 is electrically connected with the control system, the control system is internally provided with a sampling circuit, a delay circuit and a transmitting power regulating circuit in sequence, and the long-distance test transmitting system 6 and the short-distance test transmitting system 9 are respectively and electrically connected with the transmitting power regulating circuit. The receiving system 8 drives the sampling circuit to start after receiving the first laser pulse signal, then the sampling circuit drives the delay circuit to start, and after the delay circuit works, the transmitting power adjusting circuit starts, so that the power and the delay time of the laser pulse transmitted by the long-distance testing transmitting system 6 or the short-distance testing transmitting system 9 are adjusted. The relevant parameters of the transmitting power regulating circuit are changed according to the parameter change of the delay circuit, and the longer the corresponding delay time is, the smaller the transmitting power value is.
After the laser range finder 5 is assembled, an estimated maximum range can be obtained according to the relevant parameters of the laser range finder and the actual atmospheric environment, and a second delay required when the estimated maximum range is simulated can be obtained according to the estimated maximum range and the position information of the newton mirror 43, the total reflection mirror 71 and the photodetector 82 in this embodiment, and the predetermined transmitting power of the second laser pulse can be obtained by using the intensity of the first laser pulse signal received by the receiving system 8 as a reference and combining the second delay. The second delay is the set second delay. And the third delay time range of the short-distance test transmitting system 9 during working is 0-set second delay.
The control system is also internally provided with a comparator which is electrically connected with the delay circuit to adjust the relevant parameters of the delay circuit, the laser range finder 5 is electrically connected with the comparator, the control panel 3 is also provided with a plurality of control keys, and the transmission power adjusting circuit can be manually adjusted through the control keys to be communicated and electrically connected with one of the long-distance test transmitting system 6 and the short-distance test transmitting system 9. The control panel 3 is also provided with a restart key for re-verification during remote testing.
The remote test emission system 6 comprises an emission shell 64, a driving circuit 61 arranged at one end of the emission shell 64, a laser diode 62 electrically connected with the driving circuit 61, and an emission optical system 63 arranged in the emission shell 64, wherein the driving circuit 61 is electrically connected with an emission power regulating circuit, the laser diode 62 can emit laser pulses, and the emission optical system 63 is used for shaping and diverging the laser pulses emitted by the laser diode 62.
The structure of the short-distance test emission system 9 is the same as that of the long-distance test emission system 6, except that the third delay time of the short-distance test emission system 9 is shorter than the second delay time of the long-distance test emission system 6, and the predetermined emission power of the third laser pulse emitted by the short-distance test emission system 9 is higher than the predetermined emission power of the second laser pulse emitted by the long-distance test emission system 6. The position of the long-distance test emission system 6 or the short-distance test emission system 9 when being installed needs to ensure that the laser pulses emitted by the long-distance test emission system are just converged at the aperture diaphragm 72 after being reflected by the Newton mirror 43.
Laser pulses emitted by the long-distance test emission system 6 or the short-distance test emission system 9 are reflected for three times by the reflection assembly 4, the focus assembly 7 and the reflection assembly 4 and then are finally received by a receiving end in the laser range finder 5, the laser range finder 5 feeds back a measured value, and the distance measurement capability of the laser range finder 5 can be known according to the existence and the size of the measured value. Fig. 12 is a schematic diagram showing the transmission and reception of the simulated laser beam 16 when the control system controls the remote test transmission system 6 to operate, wherein the simulated laser beam 16 comprises a simulated first laser pulse and a simulated second laser pulse.
The method comprises the following specific implementation steps:
the method comprises the following steps: debugging and coaxializing a first laser pulse emitted by the sighting telescope 14 and the emitting end of the laser range finder 5, and then fixing the laser pulse to the azimuth pitching table 12;
step two: observing the position of the small-hole diaphragm 72 imaged in the Newton's mirror 43 through the sighting telescope 14, and adjusting the azimuth pitching table 12 to enable the cross hairs of the sighting telescope 14 to be superposed with the center of the small-hole diaphragm 72;
step three: a first laser pulse is emitted by an emitting end in the laser range finder 5, the first laser pulse is reflected by the Newton mirror 43 and then converged at the small aperture diaphragm 72, the laser pulse penetrating through the small aperture diaphragm 72 is reflected by the total reflection mirror 71 and is reflected by the Newton mirror 43 again, and finally the laser pulse is received by the receiving system 8;
step four: after the receiving system 8 receives the first laser pulse, the photoelectric detector 82 converts the optical signal into an electrical signal and sends the electrical signal to the receiving circuit 81, and then the receiving circuit 81 sends a signal to the sampling circuit, so that the remote testing transmitting system 6 is controlled to work through the delay circuit and the transmitting power adjusting circuit, that is, after a set second delay, the remote testing transmitting system 6 is controlled to transmit a second laser pulse with preset transmitting power, and the second laser pulse is received by a receiving end in the laser distance measuring machine 5 after being reflected for three times by the reflecting assembly 4, the focus assembly 7 and the reflecting assembly 4;
step five: after a certain time, the distance measuring capability can be verified according to whether the laser distance measuring machine 5 feeds back the measured value; if the laser range finder 5 feeds back the measured value, it indicates that the range finding capability of the laser range finder 5 can reach the displayed measured value, and the comparator does not work at this time; pressing a restart key of the control panel 3, adjusting parameters of the delay circuit to increase second delay, and repeating the third step and the fourth step until the laser range finder 5 does not feed back a measured value, wherein the measured value fed back by the laser range finder 5 for the last time is an actual maximum measuring range;
if the laser range finder 5 does not feed back the measured value, the comparator works to send a signal to the delay circuit, the parameter of the delay circuit is adjusted to reduce the second delay, so that the second laser pulse power and the second delay time emitted by the remote test emission system 6 are adjusted, the second step and the third step are repeated until the laser range finder 5 feeds back the measured value, and the displayed measured value is the actual maximum measuring range of the laser range finder 5;
after the third step, after the receiving system 8 receives the first laser pulse signal, the short-distance test transmitting system 9 can be controlled to work through the delay circuit and the transmitting power adjusting circuit, namely, after the set third delay, the short-distance test transmitting system 9 is controlled to transmit a third laser pulse with preset transmitting power, the third laser pulse is reflected for three times by the reflecting assembly 4, the focus assembly 7 and the reflecting assembly 4 and then received by a receiving end in the laser range finder 5, the laser range finder 5 feeds back a measured value, and the measured value is compared with an actual distance theoretical value, so that the short-distance measuring precision of the laser range finder 5 can be obtained.
Wherein the measured value fed back by the laser rangefinder 5 is the measured distance value displayed thereon. When short-distance measurement is carried out, the calculation method of the actual distance theoretical value comprises the following steps: the delay time is multiplied by the speed of light plus the distance traveled by the laser pulse in the device, and half of the obtained value is the actual distance theoretical value. Wherein the distance travelled by the laser within the apparatus is the sum of the distances travelled by the first laser pulse and the third laser pulse within the apparatus. The difference between the measured value fed back by the laser range finder 5 and the actual distance theoretical value is the precision of the short-distance ranging of the laser range finder 5, and the smaller the value is, the higher the precision is.
Example 2 of the invention:
the difference between this embodiment and embodiment 1 is that in this embodiment, an emission attenuation sheet is further disposed at an end of the emission housing away from the laser diode to adjust the energy of the laser pulse emitted from the remote test emission system.
Example 3 of the invention:
the difference between this embodiment and embodiment 1 is that, when the installation position of the long-distance test emission system or the short-distance test emission system is determined in this embodiment, the test card can be used to observe the position of the light spot, so as to adjust the long-distance test emission system or the short-distance test emission system, and the laser pulse emitted by the long-distance test emission system or the short-distance test emission system is just converged at the aperture stop after being reflected by the newton mirror.
Example 4 of the invention:
the difference between this embodiment and embodiment 1 is that the distance test is performed after the third step in embodiment 1, and the close test is performed after the distance test is completed. In this embodiment, the third step is followed by the near distance test, and then the long distance test is performed after the near distance test is completed.
Claims (10)
1. A method for verifying the distance measurement capability of a laser distance measuring machine is characterized by comprising the following steps:
the method comprises the following steps: a laser range finder (5), a receiving system (8) and a remote test transmitting system (6) are installed;
step two: the transmitting end of the laser range finder (5) transmits a first laser pulse to a receiving system (8);
step three: after the receiving system (8) receives the first laser pulse signal, the intensity of the received first laser pulse signal is taken as a reference, the preset transmitting power is gradually reduced in a set second delay period according to the attenuation amplitude in the laser pulse propagation process so as to simulate the attenuation of the first laser pulse signal within a certain distance, the long-distance test transmitting system (6) is controlled to transmit a second laser pulse to the laser range finder (5) according to the reduced preset transmitting power, and whether the distance measurement value can meet the distance measurement of the simulated distance is judged according to whether the laser range finder (5) feeds back the distance measurement value;
step four: and adjusting the set value of the second delay, and repeating the second step and the third step until the maximum measuring range of the laser distance measuring machine (5) is determined.
2. The method for verifying the ranging capability of the laser ranging machine as claimed in claim 1, wherein: the receiving system (8) comprises a photoelectric detector (82) and a receiving circuit (81) electrically connected with the photoelectric detector (82), the photoelectric detector (82) is used for converting a received laser pulse signal into an electric signal, and the receiving circuit (81) is electrically connected with a control system.
3. The method for verifying the ranging capability of the laser ranging machine as claimed in claim 1, wherein: after the second step, after the receiving system (8) receives the first laser pulse signal, the intensity of the received first laser pulse signal is taken as a reference, the preset transmitting power is gradually reduced during a set third delay period according to the attenuation amplitude in the laser pulse propagation process to simulate the attenuation of the first laser pulse signal within a certain distance, the short-distance test transmitting system (9) is controlled to transmit a third laser pulse according to the reduced preset transmitting power, the third laser pulse is received by the receiving end of the laser range finder (5) after being reflected for multiple times, the laser range finder (5) feeds back a measured value, and the measured value is compared with an actual distance theoretical value, so that the short-distance measuring precision of the laser range finder (5) can be obtained.
4. The method for verifying the ranging capability of the laser ranging machine as claimed in claim 1, wherein: the reflection assembly (4) and the focus assembly (7) are installed, the first laser pulse is reflected by the reflection assembly (4), then received by the focus assembly (7) and reflected to the reflection assembly (4), and finally received by the receiving system (8) after being reflected again by the reflection assembly (4).
5. The method for verifying the ranging capability of the laser range finder as claimed in claim 2, wherein: the control system is internally and sequentially provided with a delay circuit and a transmitting power regulating circuit, the long-distance test transmitting system (6) and the short-distance test transmitting system (9) are respectively and electrically connected with the transmitting power regulating circuit, and the receiving system (8) can drive the delay circuit to start after receiving a first laser pulse signal, so that the delay time and the power of the laser pulse transmitted by the long-distance test transmitting system (6) or the short-distance test transmitting system (9) can be regulated through the delay circuit and the transmitting power regulating circuit.
6. The method for verifying the ranging capability of the laser range finder as claimed in claim 5, wherein: a comparator is arranged in the control system, the comparator is electrically connected with the delay circuit to adjust relevant parameters of the delay circuit, and the laser range finder (5) is electrically connected with the comparator.
7. The method for verifying the ranging capability of the laser range finder as claimed in claim 4, wherein: the reflection assembly (4) comprises a vertical fixed support (41) and a Newton mirror (43) installed on the fixed support (41), the Newton mirror (43) is vertically arranged, and the Newton mirror (43) is used for reflecting laser pulses converged on the Newton mirror.
8. The method for verifying the ranging capability of the laser range finder as claimed in claim 4, wherein: the focus assembly (7) comprises a small-hole diaphragm (72) and a total reflection mirror (71), the first laser pulse is converged to the small-hole diaphragm (72) after being reflected by the Newton mirror (43), and then is reflected by the total reflection mirror (71) through the small-hole diaphragm (72).
9. The method for verifying the ranging capability of the laser range finder as claimed in claim 5 or 6, wherein: the remote test emission system (6) comprises a driving circuit (61) and a laser diode (62) electrically connected with the driving circuit (61), the driving circuit (61) is electrically connected with an emission power regulating circuit, and the laser diode (62) can emit pulse laser.
10. The method for verifying the ranging capability of the laser range finder as claimed in claim 4, wherein: the first laser pulse emitted by the emitting end in the laser range finder (5) is reflected by the reflecting component (4) after passing through the attenuation sheet (15), the second laser pulse or the third laser pulse also needs to pass through the attenuation sheet (15) before being received by the receiving end in the laser range finder (5), and the attenuation sheet (15) is used for simulating the attenuation effect of atmosphere on laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111057584.2A CN113791401A (en) | 2021-09-09 | 2021-09-09 | Method for verifying distance measuring capability of laser distance measuring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111057584.2A CN113791401A (en) | 2021-09-09 | 2021-09-09 | Method for verifying distance measuring capability of laser distance measuring machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114324837A (en) * | 2021-12-30 | 2022-04-12 | 山东大学 | Contact method concrete expansion and contraction detection device and method based on laser ranging |
| CN115901194A (en) * | 2023-02-20 | 2023-04-04 | 深圳市华怡丰科技有限公司 | Emitter production detection method and system of correlation type photoelectric sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324837A (en) * | 2021-12-30 | 2022-04-12 | 山东大学 | Contact method concrete expansion and contraction detection device and method based on laser ranging |
| CN115901194A (en) * | 2023-02-20 | 2023-04-04 | 深圳市华怡丰科技有限公司 | Emitter production detection method and system of correlation type photoelectric sensor |
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