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CN-121978661-A - Ranging calibration equipment and ranging calibration method

CN121978661ACN 121978661 ACN121978661 ACN 121978661ACN-121978661-A

Abstract

The application provides a ranging calibration device and a ranging calibration method, wherein the ranging calibration device comprises a base, a power module, an electric control module and a calibration module, wherein the power module is arranged on the base; the electric control module is arranged on the base and is electrically connected with the power module driver; the power module is used for driving the reflecting plates to rotate in the testing process, so that the reflecting plates are switched from an initial position to a calibration position one by one. The distance measurement calibration equipment provided by the application does not need manual replacement, can realize the arrangement of a plurality of test points, is beneficial to effectively reducing the area of a test site, and realizes the distance measurement calibration of a plurality of test points with high efficiency and area saving.

Inventors

  • PAN ZENGJIAN
  • TAO JUNWEI
  • LI DEAN
  • LIU WENLING
  • SUN DELONG
  • HE JINYANG
  • ZHAO FEIFEI

Assignees

  • 烟台艾睿光电科技有限公司

Dates

Publication Date
20260505
Application Date
20260204

Claims (13)

  1. 1. A ranging calibration device (1) characterized by comprising: A base (10); A power module (20) arranged on the base (10); A calibration module (40) including a plurality of reflecting plates (41), wherein the reflecting plates (41) are connected with the power module (20) and are arranged around the central axis of the output end of the power module (20), the reflectivity of each reflecting plate (41) is different, and The electric control module (30) is arranged on the base (10) and is electrically connected with the power module (20), and the electric control module (30) is used for controlling the power module (20) to drive the reflecting plates (41) to rotate in sequence in a test, so that the reflecting plates (41) are switched to the calibration positions one by one.
  2. 2. The distance measurement calibration device (1) according to claim 1, wherein the reflecting plate (41) has an initial position before calibration, a calibration position for receiving incident light and a waiting position after calibration, the calibration positions of all the reflecting plates (41) are the same, and the electric control module (30) controls the power module (20) to drive the reflecting plates (41) to rotate sequentially during the test process, so that the reflecting plates (41) are switched from the initial position to the calibration position one by one to complete calibration, and then switched to the waiting position in a rotating manner.
  3. 3. The distance measurement calibration device (1) according to claim 2, wherein the base (10) is provided with a limiting structure (15), the limiting structure (15) is at least partially arranged at the calibration position, the calibration module (40) further comprises a plurality of switch keys (42), one switch key (42) is correspondingly arranged on one reflecting plate (41), the switch keys (42) are respectively and independently electrically connected with the electric control module (30), and when the reflecting plate (41) moves to the calibration position, the switch keys (42) are matched with the limiting structure (15) in a positioning mode.
  4. 4. A distance measuring calibration device (1) as claimed in claim 3, characterized in that the limit structure (15) is provided with a recess (151), the switch key (42) is provided with a telescopic clamping column, and the telescopic clamping column is inserted into the recess (151) when the reflecting plate (41) rotates to the calibration position.
  5. 5. Ranging calibration device (1) according to claim 4, characterized in that the number of grooves (151) is a plurality, the number of grooves (151) being equal to or greater than the number of reflecting plates (41), the groove (151) closest to the reflecting plate (41) being in the calibration position, the remaining grooves (151) being in the waiting position.
  6. 6. The distance measuring and calibrating device (1) according to claim 5, characterized in that a plurality of grooves (151) are arranged in an arc shape along the movement track of the reflecting plate (41).
  7. 7. The distance measuring and calibrating device (1) according to claim 6, characterized in that two adjacent grooves (151) respectively form an included angle beta with the vertical connection line of the central axis of the output end of the power module (20), wherein the included angle beta is 5-15 degrees, and/or, An included angle theta between two adjacent reflecting plates (41) is 5-15 degrees.
  8. 8. Ranging calibration device (1) according to claim 1, characterized in that the reflectivity of the reflecting plate (41) increases in a counter-clockwise or clockwise direction and/or, The reflectivity of the reflecting plate (41) is 5% -80%.
  9. 9. The distance measurement calibration device (1) as set forth in claim 1, wherein the power module (20) comprises a driver (21), a rotating shaft (24) and a plurality of clutch units (25), the driver (21) is mounted on the base (10), the rotating shaft (24) is connected with the driver (21), the clutch units (25) are mounted on the rotating shaft (24) and are sequentially arranged along the axis of the rotating shaft (24), the clutch units (25) and the reflecting plates (41) are equal in number and are in one-to-one correspondence connection, and the clutch units (25) are electrically connected with the electronic control module (30) and are used for being disconnected with the rotating shaft (24) or connected with the rotating shaft (24) under the control of the electronic control module (30).
  10. 10. The distance measurement calibration device (1) according to claim 9, wherein the clutch unit (25) comprises a clutch (26) sleeved on the rotating shaft (24), and a clutch adapter plate (27) for connecting the clutch (26) and the reflecting plate (41), and the clutch (26) is electrically connected with the electronic control module (30).
  11. 11. The distance measurement calibration device (1) as claimed in claim 1, wherein the power module (20) further comprises a plurality of bearing assemblies (28) and a plurality of bearing adapter plates (29), one bearing assembly (28) is correspondingly connected with one bearing adapter plate (29), and the bearing adapter plates (29) are respectively connected with the reflecting plates (41) in a one-to-one correspondence.
  12. 12. A ranging calibration method, characterized in that the ranging calibration device (1) according to any one of claims 1-11 is applied to ranging of ranging products, comprising the following steps: Selecting a placement position, and mounting a ranging product on the placement position; Inputting preset parameters into the electronic control module (30), wherein all the reflecting plates (41) are at initial positions; The power module (20) is controlled by the electric control module (30) to drive the first reflecting plate (41) to rotate to a calibration position; Sending a laser signal to the reflecting plate (41) through the ranging product, feeding the laser signal back to the electric control module (30) as a feedback signal by the reflecting plate (41), and collecting first calibration data by the ranging product, wherein the laser signal is reflected to the ranging product through the reflecting plate (41); after the first measurement is finished, the electronic control module (30) receives a feedback signal and controls the power module (20) to drive the first reflecting plate (41) to rotate away from the calibration position; repeating the calibration operation steps of the first transmitting plate for the rest subsequent reflecting plates (41) to sequentially obtain rest calibration data; Fitting is carried out according to the obtained calibration data, a correction coefficient for improving the ranging accuracy of the ranging product is obtained, and the correction coefficient is input into a ranging model formula of the ranging product.
  13. 13. The ranging calibration method according to claim 12, wherein the ranging model formula is y=x 1 +ax 1 +bx 2 +c; wherein y is the corrected distance, x 1 is the measured distance, x 2 is the laser intensity, a is the distance coefficient, b is the laser intensity coefficient, c is a constant; And in the fitting according to the obtained calibration data, dynamically correcting a, b and c in the ranging calibration model formula, wherein the corrected a, b and c are the correction coefficients.

Description

Ranging calibration equipment and ranging calibration method Technical Field The application belongs to the technical field of laser ranging, and particularly relates to ranging calibration equipment and a ranging calibration method. Background The laser radar is one of ranging products, is a radar system for detecting characteristic quantities such as target position, speed and the like by emitting laser beams, emits the laser beams to targets, receives signals reflected by the targets, compares the signals with the emitted signals to obtain target related information, and is widely applied to the fields of geographic mapping, automatic driving and the like according to the characteristics of high precision and high resolution. At present, when the laser radar performs distance measurement calibration, signals are transmitted and received from a plurality of distance test boards with different reflectivities, and then standard distance measurement parameters are obtained through processing, and in the test process, the test boards with different reflectivities are manually switched, so that the laser radar has the advantages of manual occupation and lower efficiency. Therefore, there is a need to develop a ranging device for automatically switching test boards to efficiently realize ranging calibration of multiple test points. Disclosure of Invention The first object of the present application is to provide a ranging calibration device, so as to solve the technical problems of manual switching, labor occupation and low efficiency of test boards with different reflectivities in the test process in the prior art. The second object of the present application is to provide a ranging calibration method, which is a method for applying the ranging calibration device to ranging of ranging products. In order to achieve the above purpose, the application adopts the following technical scheme: Provided is a ranging calibration device including: A base; The power module is arranged on the base; The calibration module comprises a plurality of reflecting plates, a plurality of power modules and a calibration module, wherein the reflecting plates are connected with the power modules and are arranged around the central axis of the output end of the power module, the reflectivity of each reflecting plate is different, and The electric control module is arranged on the base and electrically connected with the power module, and is used for controlling the power module to drive the reflecting plates to rotate in sequence in the test, so that the reflecting plates are switched to the calibration positions one by one. Optionally, the electric control module controls the power module to drive the reflecting plates to rotate sequentially in the test process, and the reflecting plates are switched from the initial position to the calibration position one by one to finish calibration and then switched to the waiting position in a rotating way. Optionally, a limit structure is arranged on the base, the limit structure is at least partially arranged at the calibration position, the calibration module further comprises a plurality of switch keys, one switch key is correspondingly arranged on one reflecting plate, the switch keys are respectively and independently electrically connected with the electric control module, and when the reflecting plate moves to the calibration position, the switch keys are matched with the limit structure in a positioning way. Optionally, the limit structure is equipped with the recess, the switch key has scalable card post, works as the reflecting plate rotates to the calibration position, scalable card post inserts and locates in the recess. Optionally, the number of the grooves is more than or equal to the number of the reflecting plates, the groove closest to the reflecting plates is located at the calibration position, and the rest of the grooves are located at the waiting position. Optionally, the plurality of grooves are arranged in an arc shape along the movement track of the reflecting plate. Optionally, two adjacent grooves respectively form an included angle beta with the vertical connection line of the central axis of the output end of the power module, the included angle beta is 5-15 degrees, and/or, The included angle theta between two adjacent reflecting plates is 5-15 degrees. Alternatively, the reflectivity of the reflective plate increases in a counterclockwise direction or a clockwise direction, and/or, The reflectivity of the reflecting plate is 5% -80%. Optionally, the power module (20) comprises a driver, a rotating shaft and a plurality of clutch units, wherein the driver is installed on the base, the rotating shaft is connected with the driver, each clutch unit is installed on the rotating shaft and sequentially arranged along the axis of the rotating shaft, the clutch units and the reflecting plates are equal in number and are in one-to-one corresponding connection arrangement, an