CN115327519A - Ranging error detection system and method of handheld laser range finder - Google Patents
Ranging error detection system and method of handheld laser range finder Download PDFInfo
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- CN115327519A CN115327519A CN202211258914.9A CN202211258914A CN115327519A CN 115327519 A CN115327519 A CN 115327519A CN 202211258914 A CN202211258914 A CN 202211258914A CN 115327519 A CN115327519 A CN 115327519A
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- 238000012795 verification Methods 0.000 description 2
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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
- G01S7/497—Means for monitoring or calibrating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a distance measuring error detection system and method of a handheld laser distance measuring instrument, wherein the system comprises a handheld laser distance measuring instrument fixing device, a laser interferometer, a camera, an error detection processor, a memory, a reflection module and a mobile device; the handheld laser range finder fixing device is provided with a laser interferometer fixing position and a plurality of handheld laser range finder fixing positions; the reflecting module comprises a reflecting plate and a reflecting prism which are fixed on the mobile device; the mobile device is used for driving the reflection module to move when error detection is carried out; and the error detection processor is used for reading the measurement data of each handheld laser range finder according to the shooting result transmitted by the camera, storing the measurement data and the data output by the laser interferometer into the memory, and performing error detection according to the data stored in the memory. The ranging error detection system and method provided by the invention effectively improve the detection efficiency and the detection accuracy.
Description
Technical Field
The invention relates to laser ranging, in particular to a ranging error detection system and method of a handheld laser range finder.
Background
The handheld laser range finder measures distance by taking a laser as a light source, plays an important role in industrial production and engineering distance calibration, and has very important influence on the application process due to the accuracy of the handheld laser range finder, so that the handheld laser range finder often needs to detect the distance measurement error before being put into use;
however, in terms of the present, each distance meter needs to measure data of not less than 13 points on a baseline with a certain length according to measurement requirements, and currently, more than half an hour is needed for detecting one handheld laser distance meter, which seriously affects verification efficiency, and it is seen that detection of the handheld laser distance meter faces question and answer questions such as low efficiency and inaccurate detection data.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a distance measuring error detection system and method of a handheld laser distance measuring instrument, and effectively improves the detection efficiency and the detection accuracy.
The purpose of the invention is realized by the following technical scheme: a distance measuring error detection system of a handheld laser distance measuring instrument comprises a handheld laser distance measuring instrument fixing device, a laser interferometer, a camera, an error detection processor, a memory, a reflection module and a moving device;
the handheld laser range finder fixing device is provided with a laser interferometer fixing position and a plurality of handheld laser range finder fixing positions, each range finder fixing position is used for fixing a handheld laser range finder to be detected, and the laser interferometer fixing position is used for fixing the laser interferometer;
the reflection module comprises a reflection plate and a reflection prism which are fixed on the mobile device, and the reflection plate is used for reflecting emergent light of the handheld laser range finder to be measured, so that the handheld laser range finder to be measured can receive the reflected light of the emergent light of the handheld laser range finder to be measured and measure the distance; the reflecting prism is used for reflecting the emergent light of the laser interferometer, so that the laser interferometer can receive the reflected light of the emergent light of the laser interferometer and measure the distance;
the mobile device is used for driving the reflection module to adjust the distance between the reflection module and the fixing device of the handheld laser range finder during error detection;
the camera is used for shooting the ranging display panel of each handheld laser range finder and transmitting the shooting result to the error detection processor; the data output end of the laser interferometer is connected with the error detection device;
and the error detection processor is used for reading the measurement data of each handheld laser range finder according to the shooting result transmitted by the camera, storing the measurement data and the data output by the laser interferometer into the memory, and performing error detection according to the data stored in the memory.
A distance measurement error detection method of a handheld laser distance meter comprises the following steps:
s1, controlling each handheld laser range finder and each laser interferometer to output emergent light, receiving reflected light of a transmitting plate by the handheld laser range finders to measure distances, and receiving the reflected light of a reflecting prism by the laser interferometers to measure the distances;
s2, repeatedly executing the step S1 for n times, recording data measured by the laser interferometer and each handheld laser range finder, and deleting abnormal parameters;
s3, after the measurement data of the laser interferometer are abnormally deleted, averaging the rest measurement data to be used as the current standard distance measurement;
s4, after data measured by any one handheld laser range finder is abnormally deleted, averaging the rest measured data to serve as a ranging result of the handheld laser range finder, and subtracting the current standard ranging data from the ranging result of the handheld laser range finder to obtain an error detection result of the handheld laser range finder;
s5, for each handheld laser range finder, repeatedly executing the step S4 to obtain error detection results of all the handheld laser range finders;
and S6, controlling the mobile device to drive the transmitting plate to move, adjusting the distance between the reflecting plate and the fixing device of the handheld laser range finder, and repeatedly executing the steps S1-S5 after the mobile device stops moving to obtain error detection results of different distances.
The step S2 includes the following substeps:
s201, setting the result obtained by ranging of a laser interferometer or any one handheld laser range finder as x1, x2,.. And xn, and calculating the average value x of the ranging result;
s202, for each ranging result, calculating a residual error, wherein the residual error vi of the ith ranging result xi is as follows:
vi=xi-x，i=1,2，...,n
s203, if the residual error vi, i =1,2, of a certain measured value xi, n satisfies the following formula
|vi|=|xi-x|>3σ
Considering xi as a bad value containing a coarse error value, and removing xi from the bad value, wherein sigma represents a standard deviation;
and S204, for each handheld laser range finder and each laser interferometer, repeatedly executing the step S203 to delete the abnormal parameters.
The standard deviation is calculated as follows:
for the laser interferometer or any one of the handheld laser range finders in the step, if the result obtained by the ranging is x1, x 2.
Wherein s (x) is the deviation of the measured value x,
is the average of x1, x 2., xn,
the calculated deviation s (x) is expressed as a standard deviation σ.
The invention has the beneficial effects that: the invention is provided with the fixed positions of the plurality of handheld laser range finders, can simultaneously carry out error detection on the plurality of handheld laser range finders, and effectively improves the detection efficiency; when each laser detector is subjected to error detection, abnormal data are removed, and the accuracy of the detected data is ensured; and error detection can be carried out based on different actual distances, and the detection accuracy is further improved.
Drawings
Fig. 1 is a schematic diagram of the principle of the present invention.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1, a ranging error detection system of a handheld laser range finder comprises a handheld laser range finder fixing device, a laser interferometer, a camera, an error detection processor, a memory, a reflection module and a mobile device;
the handheld laser range finder fixing device is provided with a laser interferometer fixing position and a plurality of handheld laser range finder fixing positions, each range finder fixing position is used for fixing a handheld laser range finder to be detected, and the laser interferometer fixing position is used for fixing the laser interferometer;
the reflection module comprises a reflection plate and a reflection prism which are fixed on the mobile device, and the reflection plate is used for reflecting emergent light of the handheld laser range finder to be measured, so that the handheld laser range finder to be measured can receive the reflected light of the emergent light of the handheld laser range finder to be measured and measure the distance; the reflecting prism is used for reflecting the emergent light of the laser interferometer, so that the laser interferometer can receive the reflected light of the emergent light of the laser interferometer and measure the distance;
the mobile device is used for driving the reflection module to adjust the distance between the reflection module and the fixing device of the handheld laser range finder during error detection;
the camera is used for shooting the ranging display panel of each handheld laser range finder and transmitting the shooting result to the error detection processor; the data output end of the laser interferometer is connected with the error detection device;
and the error detection processor is used for reading the measurement data of each handheld laser range finder according to the shooting result transmitted by the camera, storing the measurement data and the data output by the laser interferometer into the memory, and performing error detection according to the data stored in the memory.
In the embodiment of the application, after the laser interferometer and each handheld laser range finder are fixed, the distance measuring reference surfaces of the laser interferometer and each handheld laser range finder are in the same plane. The emergent light transmission direction of each handheld laser range finder is vertical to the reflecting plate; the reflecting plate is used for receiving emergent light of each handheld laser range finder and completing reflection; the transmission direction of the emergent light of the laser interferometer is perpendicular to the reflection surface of the reflection prism, and the reflection surface of the reflection prism is used for receiving the emergent light of the laser interferometer and completing reflection. The ranging error detection system further comprises a wireless transmission module, wherein the wireless transmission module is connected with the error detection processor and used for transmitting the error detection result to a remote detection background. The distance from the handheld laser range finder to the reflecting surface is equal to the distance from the laser interferometer to the reflecting surface of the reflecting prism. The moving device drives the reflecting module to move in a direction parallel to the emergent light transmission direction of the laser interferometer and each handheld laser range finder; the mobile device is a transmission belt driven by a stepping motor or a support plate driven by a cylinder.
A distance measurement error detection method of a handheld laser distance meter comprises the following steps:
s1, controlling each handheld laser range finder and each laser interferometer to output emergent light, receiving reflected light of a transmitting plate by the handheld laser range finders to measure distances, and receiving the reflected light of a reflecting prism by the laser interferometers to measure the distances;
s2, repeating the step S1 for n times, recording data measured by the laser interferometer and each handheld laser range finder, and deleting abnormal parameters;
the step S2 includes the following substeps:
s201, setting the result obtained by ranging of a laser interferometer or any one handheld laser range finder as x1, x2,.. And xn, and calculating the average value x of the ranging result;
s202, calculating a residual error for each ranging result, wherein the residual error vi of the ith ranging result xi is as follows:
vi=xi-x，i=1,2，...,n
s203, if the residual error vi, i =1,2, of a certain measured value xi, n satisfies the following formula
|vi|=|xi-x|>3σ
Then xi is considered as a bad value containing a coarse error value, and is removed, wherein sigma represents the standard deviation;
s204, for each handheld laser range finder and each laser interferometer, the step S203 is repeatedly executed, and abnormal parameter deletion is achieved.
The standard deviation is calculated as follows:
for the laser interferometer or any one of the handheld laser range finders in the step, if the result obtained by the ranging is x1, x 2.
Wherein s (x) is the deviation of the measured value x,
is an average of x1, x 2.,. Xn,
as a residual, n-1 is a degree of freedom, and the calculated deviation s (x) is expressed as a standard deviation σ.
S3, after the measurement data of the laser interferometer are abnormally deleted, averaging the rest measurement data to be used as the current standard distance measurement;
s4, after data measured by any one handheld laser range finder is abnormally deleted, averaging the rest measured data to serve as a ranging result of the handheld laser range finder, and subtracting the current standard ranging data from the ranging result of the handheld laser range finder to obtain an error detection result of the handheld laser range finder;
s5, for each handheld laser range finder, repeatedly executing the step S4 to obtain error detection results of all the handheld laser range finders;
and S6, controlling the mobile device to drive the transmitting plate to move, adjusting the distance between the reflecting plate and the fixing device of the handheld laser range finder, and repeatedly executing the steps S1-S5 after the mobile device stops moving to obtain error detection results of different distances.
In the embodiment of the application, each time of error detection data can be stored in the memory, and meanwhile, the model data of each handheld laser range finder can be stored, so that the accuracy grade of the same model range finder can be counted conveniently. Or counting data of the same model for many years to obtain a stability conclusion; then, the average value of the ranging errors of the handheld laser range finders of the same model is counted, the accuracy level is determined according to the average value of the ranging errors of the model, and in the embodiment, the corresponding error ranges of different accuracy levels are obtained through preset or known verification standards.
In the embodiment of the application, the error detection processor transmits the detection result of each time to the remote detection background through the wireless communication module, so that remote monitoring is facilitated.
The foregoing description shows and describes a preferred embodiment of the invention, but as aforementioned, it is to be understood that the invention is not limited to the form disclosed herein, but is not to be construed as excluding other embodiments and from various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a range finding error detecting system of hand-held type laser rangefinder which characterized in that: the device comprises a handheld laser range finder fixing device, a laser interferometer, a camera, an error detection processor, a memory, a reflection module and a mobile device;
the handheld laser range finder fixing device is provided with a laser interferometer fixing position and a plurality of handheld laser range finder fixing positions, each range finder fixing position is used for fixing a handheld laser range finder to be detected, and the laser interferometer fixing position is used for fixing the laser interferometer;
the reflection module comprises a reflection plate and a reflection prism which are fixed on the mobile device, and the reflection plate is used for reflecting emergent light of the handheld laser range finder to be measured, so that the handheld laser range finder to be measured can receive reflected light of the emergent light of the handheld laser range finder to be measured and measure the distance; the reflecting prism is used for reflecting the emergent light of the laser interferometer, so that the laser interferometer can receive the reflected light of the emergent light of the laser interferometer and measure the distance;
the mobile device is used for driving the reflection module to adjust the distance between the reflection module and the fixing device of the handheld laser range finder during error detection;
the camera is used for shooting the ranging display panel of each handheld laser range finder and transmitting the shooting result to the error detection processor; the data output end of the laser interferometer is connected with the error detection device;
and the error detection processor is used for reading the measurement data of each handheld laser range finder according to the shooting result transmitted by the camera, storing the measurement data and the data output by the laser interferometer into the memory, and performing error detection according to the data stored in the memory.
2. A range error detection system of a hand-held laser range finder as claimed in claim 1, wherein: after the laser interferometer and each handheld laser range finder are fixed, the distance measuring reference surfaces of the laser interferometer and each handheld laser range finder are in the same plane.
3. A range error detection system of a hand-held laser range finder as claimed in claim 1, wherein: the emergent light transmission direction of each handheld laser range finder is vertical to the reflecting plate; the reflecting plate is used for receiving emergent light of each handheld laser range finder and completing reflection;
the transmission direction of the emergent light of the laser interferometer is perpendicular to the reflection surface of the reflection prism, and the reflection surface of the reflection prism is used for receiving the emergent light of the laser interferometer and completing reflection.
4. A range error detection system of a hand-held laser range finder as claimed in claim 1, wherein: the ranging error detection system further comprises a wireless transmission module, wherein the wireless transmission module is connected with the error detection processor and used for transmitting the error detection result to the remote detection background.
5. A range error detection system of a hand-held laser range finder as claimed in claim 3, wherein: the distance from the handheld laser range finder to the reflecting surface is equal to the distance from the laser interferometer to the reflecting surface of the reflecting prism.
6. A range error detection system of a hand-held laser range finder as claimed in claim 1, wherein: the moving device drives the reflecting module to move in a direction parallel to the emergent light transmission direction of the laser interferometer and each handheld laser range finder.
7. A range error detection system of a hand-held laser range finder as claimed in claim 1, wherein: the mobile device is a transmission belt driven by a stepping motor or a support plate driven by a cylinder.
8. A distance measurement error detection method of a handheld laser distance meter, based on the system of any one of claims 1 to 7, characterized in that: the method comprises the following steps:
s1, controlling each handheld laser range finder and the output light of a laser interferometer, receiving reflected light of a transmitting plate by the handheld laser range finders for ranging, receiving reflected light of a reflecting prism by the laser interferometer for ranging;
s2, repeating the step S1 for n times, recording data measured by the laser interferometer and each handheld laser range finder, and deleting abnormal parameters;
s3, after the measurement data of the laser interferometer are abnormally deleted, averaging the rest measurement data to be used as the current standard distance measurement;
s4, after data measured by any one handheld laser range finder is abnormally deleted, averaging the rest measured data to serve as a ranging result of the handheld laser range finder, and subtracting the current standard ranging data from the ranging result of the handheld laser range finder to obtain an error detection result of the handheld laser range finder;
s5, for each handheld laser range finder, repeatedly executing the step S4 to obtain error detection results of all the handheld laser range finders;
and S6, controlling the mobile device to drive the transmitting plate to move, adjusting the distance between the reflecting plate and the fixing device of the handheld laser range finder, and repeatedly executing the steps S1-S5 after the mobile device stops moving to obtain error detection results of different distances.
9. The method of claim 8, wherein the step of detecting the range error comprises: the step S2 includes the following substeps:
s201, for a laser interferometer or any one handheld laser range finder, setting the result obtained by ranging as x1, x2, a.
S202, calculating a residual error for each ranging result, wherein the residual error vi of the ith ranging result xi is as follows:
vi=xi-x，i=1,2，...,n
s203, if the residual error vi, i =1,2, of a certain measured value xi, n satisfies the following formula
|vi|=|xi-x|>3σ
Then xi is considered as a bad value containing a coarse error value, and is removed, wherein sigma represents the standard deviation;
and S204, for each handheld laser range finder and each laser interferometer, repeatedly executing the step S203 to delete the abnormal parameters.
10. The method of claim 9, wherein the step of detecting the range error comprises: the standard deviation is calculated as follows:
for the laser interferometer or any one of the handheld laser range finders in the step, if the result obtained by the ranging is x1, x 2.
Wherein s (x) isThe deviation of the magnitude x is such that,
is an average of x1, x 2.,. Xn,
as a residual, n-1 is a degree of freedom, and the calculated deviation s (x) is expressed as a standard deviation σ.
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| CN202211258914.9A CN115327519A (en) | 2022-10-14 | 2022-10-14 | Ranging error detection system and method of handheld laser range finder |
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| CN111458696A (en) * | 2020-05-14 | 2020-07-28 | 厦门通测电子有限公司 | Calibration method for indication error of handheld laser range finder |
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2022
- 2022-10-14 CN CN202211258914.9A patent/CN115327519A/en active Pending
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| CN111458696A (en) * | 2020-05-14 | 2020-07-28 | 厦门通测电子有限公司 | Calibration method for indication error of handheld laser range finder |
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