CN112240760A - Laser swinger detector assembly and method for estimating swinger laser position - Google Patents
Laser swinger detector assembly and method for estimating swinger laser position Download PDFInfo
- Publication number
- CN112240760A CN112240760A CN202011100770.5A CN202011100770A CN112240760A CN 112240760 A CN112240760 A CN 112240760A CN 202011100770 A CN202011100770 A CN 202011100770A CN 112240760 A CN112240760 A CN 112240760A
- Authority
- CN
- China
- Prior art keywords
- laser
- swinger
- photoelectric detection
- detection units
- estimating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/002—Active optical surveying means
Abstract
The invention provides a laser swinger detector assembly and a method for estimating the swinger laser position. The laser swinger detector assembly is formed by four photoelectric detection units which are vertically arranged in pairs around a supporting frame in 360 degrees. The laser swinger detector component estimates the distance of the swinger laser through the pulse time interval and the scanning period of two adjacent photoelectric detection units; receiving an optical signal output by the laser swinger through a photoelectric detection unit, outputting light intensity information and light intensity variable quantity through a data processing module, and calculating to obtain azimuth information of the swinger laser; and estimating the height of the sweeping laser by a gravity center method according to the elevation function of the photoelectric detection unit. The laser leveling instrument has the leveling function, can estimate the distance, the azimuth, the height and other information of the leveling laser, reduces additional measuring instruments, improves the accurate control degree of engineering operation equipment, and has the advantages of simple operation, high work efficiency and the like.
Description
Technical Field
The invention belongs to the technical field of building measurement and detection instruments, and particularly relates to a laser swinger detector assembly and a method for estimating the swinger laser position.
Background
The laser leveling instrument is driven by a quick rotating shaft to enable a visible laser spot to sweep out light rays at the same level height, so that engineering personnel can conveniently position the level height.
The laser swinger is a surveying and mapping instrument integrating optical, mechanical and electronic technologies, can provide a horizontal reference surface for engineering application, is matched with a detector, can control the horizontal height of any measuring point in a test range, can combine measurement and construction together, and realizes construction automation, so that the laser swinger is widely applied to the aspects of building construction, flat ground, airport building and the like.
However, in order to realize accurate control of engineering operation equipment, information such as target height, direction, distance and the like is generally required to be mastered, the laser swinger detector only has a height measurement function, additional instruments are often required to measure the target direction and distance, and the number of the instruments is increased, so that the operation is complex, and the engineering operation is not facilitated.
Therefore, how to enable the laser leveling instrument to have the leveling function and simultaneously integrate azimuth estimation, distance estimation and height estimation, the quantity of instruments required in the construction process is reduced, the construction process is simplified, the construction efficiency and quality are improved, the labor cost and the labor intensity are reduced, and the technical problem to be solved is needed urgently.
Disclosure of Invention
To solve the above technical problem, the present invention provides a laser swinger detector assembly and a method for estimating the swinger laser position. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
The invention adopts the following technical scheme:
in some alternative embodiments, there is provided a laser swinger detector assembly comprising: the photoelectric detection units are uniformly arranged around the support frame, adjacent photoelectric detection units are vertical to each other, and each photoelectric detection unit consists of a circuit board and a row of silicon photocells.
In some alternative embodiments, there is provided a method of estimating a swept laser position, comprising:
placing the laser scanner probe assembly of claim 1 within a laser scan plane generated by a laser scanner;
a photoelectric detection unit in the laser swinger detector assembly receives an optical signal output by the laser swinger and converts the optical signal into an electric signal;
estimating a sweeping laser distance according to the pulse time interval detected by two adjacent photoelectric detection units and the scanning period of the laser sweeping instrument;
estimating the azimuth of the sweeping laser according to the light intensity information detected by the two adjacent photoelectric detection units;
and estimating the height of the sweeping laser by a gravity center method through the elevation function of the photoelectric detection unit.
In some optional embodiments, the estimating of the sweeping laser distance according to the pulse time interval detected by two adjacent photodetecting units and the scanning period of the laser scanner includes:
two adjacent photoelectric detection units receive the optical signal output by the laser swinger, and in a pulse cycle, the time difference of pulse starting points of the two adjacent photoelectric detection units output by the data processing module is t1；
Acquiring the sweep period of the laser sweep instrument as T and the duty ratio as T
The scanning surface radius L of the laser swinger corresponding to the positions of the two adjacent photoelectric detection units obtains that the circumference of the scanning surface of the laser swinger is 2 pi L;
the distance between two adjacent photoelectric detection units is D, and the ratio of the obtained scanning distance is D
The duty ratio is equal to the scanning distance, which can be given by:
obtaining the distance between the laser swinger and the laser swinger detector component, which is as follows:
in some optional embodiments, the estimating the azimuth of the sweeping laser according to the light intensity information detected by two adjacent photoelectric detection units includes:
the data processing module outputs light intensity information collected by the two adjacent photoelectric detection units, and the light intensity information is respectively marked as P1 and P2;
the azimuth angle θ is obtained according to the following equation:
P2＝P1(1-cos2θ)；
the azimuth angle theta is an included angle between visible laser emitted by the laser swinger and a photoelectric detection unit which firstly receives laser spots in the two adjacent photoelectric detection units and is irradiated by the visible laser.
The invention has the following beneficial effects: compared with the prior art, the laser leveling instrument has the leveling function, and meanwhile, the height, distance and direction of the leveling laser can be estimated, so that extra measuring instruments in the construction process are reduced, the construction process is simplified, and the construction efficiency is improved; the estimation method is simple, reliable and low in cost.
Drawings
FIG. 1 is a top view of the laser scanner probe assembly of the present invention;
FIG. 2 is a schematic diagram of the distance estimation of the detector assembly of the laser swinger according to the present invention;
FIG. 3 is a schematic diagram of the azimuth estimation of the laser swinger detector assembly according to the present invention;
FIG. 4 is a schematic diagram of the laser scanner probe assembly height estimation of the present invention;
fig. 5 is a schematic diagram of the pulse time intervals detected by two adjacent photoelectric detection units and the scanning period of the laser scanner.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others.
As shown in fig. 1, in some illustrative embodiments, there is provided a laser-scanner probe assembly comprising: a shell 1, a support frame 4 and a photoelectric detection unit 5. The number of the photoelectric detection units 5 is four, the photoelectric detection units are arranged around the support frame 4, the four photoelectric detection units 5 are uniformly arranged around the support frame 4, the adjacent photoelectric detection units are mutually perpendicular, namely every two of the four photoelectric detection units 5 are perpendicular to each other and form 360 degrees around the support frame 4, and the configuration can detect the sweeping laser position by 360 degrees.
The photoelectric detection unit 5 is composed of a circuit board 2 and a row of silicon photocells 3.
In the specific implementation of the invention, the laser swinger detector assembly is matched with a bubble type laser swinger, an automatic leveling laser swinger and an electronic automatic leveling swinger for use.
The laser swinger detection assembly capable of estimating the swinger laser position specifically estimates the swinger laser distance through the pulse time interval and the scanning period of two adjacent photoelectric detection units 5; according to the light intensity information and the light intensity variable quantity of the photoelectric detection unit output by the data processing module, the azimuth of the sweeping laser is obtained after resolving; and estimating the height of the sweeping laser by a gravity center method according to the elevation function of the photoelectric detection unit.
The laser swinger detector assembly provided by the invention can be used for realizing the estimation of the azimuth, the distance and the height of the laser swinger through the following processes, namely, a method for estimating the swinger laser position is provided.
In some illustrative embodiments, the method of estimating the swept laser position comprises:
firstly, the laser scanning plane detector assembly is placed in a laser scanning plane generated by the laser scanning plane 10, namely, the laser scanning plane 10 is placed at any position of the detectable range of the laser scanning plane detector assembly.
Then, the photoelectric detection unit 5 in the laser swinger detector assembly receives the optical signal output by the laser swinger 10, converts the optical signal into an electrical signal, and amplifies and controls the electrical signal according to the strength of the received signal. When the laser swinger 10 works, a visible laser beam is projected, the visible laser beam is deflected by a rotating pentaprism for 90 degrees and is emitted, so that a laser scanning surface is generated, two photoelectric detection units 5 which directly face the laser beam continuously receive laser spots emitted by the laser swinger 10, and the adjacent photoelectric detection units 5 which receive the laser spots are recorded as a first detection unit 6 and a second detection unit 7.
And then, estimating the sweeping laser distance according to the pulse time interval detected by two adjacent photoelectric detection units and the scanning period of the laser scanner. As shown in fig. 2, 3 and 5, the specific process of estimating the sweeping laser distance is as follows:
two adjacent photovoltaicsThe detection unit receives the optical signal output by the laser swinger, and in a pulse cycle, the data processing module outputs the time difference from the pulse starting point of the first detection unit 6 to the pulse starting point of the second detection unit 7 as t1；
The sweep period of the laser swinger is T and the duty ratio is T according to the rotating speed gear setting of the laser swinger 10
The distance between the laser swinger 10 and the photoelectric detection unit 5 in the laser swinger detector assembly is L, and L is the radius of the laser scanning surface of the laser swinger 10, namely the radius of the scanning surface of the laser swinger corresponding to the positions of two adjacent photoelectric detection units 5 is recorded as L, and the circumference of the scanning surface of the laser swinger is 2 pi L;
the distance between two adjacent photoelectric detection units is D, that is, the mechanical structure of the laser scanner 10 can obtain the distance between the first detection unit 6 and the second detection unit 7 as D, and obtain the scanning distance ratio as D
The duty ratio is equal to the scanning distance ratio, and the following formula can be obtained:
the distance between the laser swinger 10 and the laser swinger detector assembly is obtained as follows:
fig. 2 shows that the laser swinger is in an ideal position, that is, the laser swinger is in a central position of an adjacent photoelectric detection unit of the laser swinger detector assembly, and both the theoretical scanning distance from the first detection unit 6 to the second detection unit 7 and the projection distance of the detector distance in the azimuth are D.
When the laser swinger is located at a position other than the central position of the first detection unit 6 and the second detection unit 7, as shown in fig. 3, in the theoretical scanning distance ratio, the scanning perimeter of the laser swinger is 2 pi L, and the scanning distance between adjacent detection units within the scanning perimeter is D1. In the actual scanning distance ratio, the scanning perimeter of the laser swinger is 2 pi L, and the scanning distance between two adjacent photoelectric detection units is D.
At this time, the theoretical scanning distance from the first detection unit 6 to the second detection unit 7 is D1, and after azimuth correction, that is, when the laser swinger is in an ideal position, the projection distance of the detector distance on the azimuth is D, and D is equal to D1.
The method can estimate the azimuth of the sweeping laser while estimating the distance of the sweeping laser, and specifically estimates the azimuth of the sweeping laser according to the light intensity information detected by two adjacent photoelectric detection units, and the specific process is as follows:
as shown in fig. 3, the first detection unit 6 to the second detection unit 7 continuously receive the optical signals output by the laser swinger 10, and the light intensity information P of the first detection unit 6 is output through the data processing module1And light intensity information P of the second detection unit 72The light intensity information of the adjacent photoelectric detection units can be obtained, and at the moment, three special positions exist, namely:
first, the light intensity P of the first detection unit1With the light intensity P of the second detection unit2Meanwhile, the laser swinger 10 is positioned in the center of the first detection unit 6 to the second detection unit 7 of the laser swinger detector assembly;
in the second case, the light intensity P of the first detection unit1Reaching the peak value 1, the light intensity P of the second detection unit2When the number is 0, the laser swinger 10 is positioned right above the first detection unit 6 in the laser swinger detector assembly;
in the third case, the first detection unit has a light intensity P10, light intensity P of the second detection unit2When the peak value 1 is reached, the laser swinger 10 is positioned right above the second detection unit 7 of the laser swinger detector assembly.
Therefore, the light intensity variation of each photoelectric detection unit 5 of the laser swinger detector assembly ideally has a cosine function.
When the laser swinger 10 is in between the second and third situation, i.e. the laser swinger 10 is located in the 90 ° included angle region directly above the first detection unit 6 and directly above the second detection unit 7. During this period, the light intensity variation functions of the first detection unit 6 and the second detection unit 7 are overlapped, i.e. P exists1And P2All of which are not 0, the azimuth angle theta and the light intensity P of the first detection unit1With the light intensity P of the second detection unit2The variation is related by the following formula:
P2＝P1(1-cos2θ)。
therefore, when the sweeping laser azimuth is estimated, the data processing module outputs the light intensity information collected by two adjacent photoelectric detection units, which are respectively marked as P1And P2；
The azimuth angle θ is obtained according to the following equation:
P2＝P1(1-cos2θ)；
the azimuth angle theta is an included angle between visible laser emitted by the laser swinger and a photoelectric detection unit which receives laser spots firstly when the visible laser irradiates two adjacent photoelectric detection units.
According to the invention, the light intensity information of different adjacent photoelectric detection units 5 is processed by the data processing module, the approximate direction of the laser swinger 10 in the laser swinger detector assembly can be judged, and the specific direction angle theta is estimated according to the light intensity information of the photoelectric detection units.
As shown in fig. 4, when estimating the laser azimuth and the laser distance, the laser height of the sweeping laser can be estimated, specifically, the laser height of the sweeping laser is estimated by the gravity center method through the elevation function of the photoelectric detection unit, and the specific calculation process is as follows:
each photoelectric detection unit consists of a row of silicon photocells which are tightly arranged on the PCB, and if the size of the silicon photocell is B, the distance between the silicon photocells is D, and the size of the laser spot is R, the central position Xc of the laser spot can be calculated according to a gravity center method, which is as follows:
wherein x is the position coordinate of the silicon photocell,
is the photocurrent generated by the x-silicon photocell when being irradiated by laser.
The laser swinger 10 is matched with the laser swinger detector assembly for use, so that the laser swinger 10 has a swinger function, and meanwhile, distance, direction and height information of swinger laser is estimated, redundant measuring instruments in construction engineering are reduced, construction steps are simplified, and work efficiency is improved.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
Claims (4)
1. Laser swinger detector assembly, its characterized in that includes: the photoelectric detection units are uniformly arranged around the support frame, adjacent photoelectric detection units are vertical to each other, and each photoelectric detection unit consists of a circuit board and a row of silicon photocells.
2. A method of estimating a swept laser position, comprising:
placing the laser scanner probe assembly of claim 1 within a laser scan plane generated by a laser scanner;
a photoelectric detection unit in the laser swinger detector assembly receives an optical signal output by the laser swinger and converts the optical signal into an electric signal;
estimating a sweeping laser distance according to the pulse time interval detected by two adjacent photoelectric detection units and the scanning period of the laser sweeping instrument;
estimating the azimuth of the sweeping laser according to the light intensity information detected by the two adjacent photoelectric detection units;
and estimating the height of the sweeping laser by a gravity center method through the elevation function of the photoelectric detection unit.
3. The method for estimating the position of the sweeping laser according to claim 2, wherein the process of estimating the distance of the sweeping laser according to the pulse time interval detected by two adjacent photoelectric detection units and the scanning period of the laser sweeping instrument comprises:
two adjacent photoelectric detection units receive the optical signal output by the laser swinger, and in a pulse cycle, the time difference of pulse starting points of the two adjacent photoelectric detection units output by the data processing module is t1；
Acquiring the sweep period of the laser sweep instrument as T and the duty ratio as T
The scanning surface radius L of the laser swinger corresponding to the positions of the two adjacent photoelectric detection units obtains that the circumference of the scanning surface of the laser swinger is 2 pi L;
the distance between two adjacent photoelectric detection units is D, and the ratio of the obtained scanning distance is D
The duty ratio is equal to the scanning distance, which can be given by:
obtaining the distance between the laser swinger and the laser swinger detector component, which is as follows:
4. the method for estimating the position of the sweeping laser according to claim 3, wherein the process of estimating the azimuth of the sweeping laser according to the light intensity information detected by two adjacent photoelectric detection units comprises:
the data processing module outputs light intensity information collected by the two adjacent photoelectric detection units, and the light intensity information is respectively marked as P1 and P2;
the azimuth angle θ is obtained according to the following equation:
P2＝P1(1-cos2θ)；
the azimuth angle theta is an included angle between visible laser emitted by the laser swinger and a photoelectric detection unit which firstly receives laser spots in the two adjacent photoelectric detection units and is irradiated by the visible laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011100770.5A CN112240760A (en) | 2020-10-15 | 2020-10-15 | Laser swinger detector assembly and method for estimating swinger laser position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011100770.5A CN112240760A (en) | 2020-10-15 | 2020-10-15 | Laser swinger detector assembly and method for estimating swinger laser position |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112240760A true CN112240760A (en) | 2021-01-19 |
Family
ID=74169022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011100770.5A Pending CN112240760A (en) | 2020-10-15 | 2020-10-15 | Laser swinger detector assembly and method for estimating swinger laser position |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112240760A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201233534Y (en) * | 2007-10-15 | 2009-05-06 | 顾杰 | Precise automatic tracking system for sun |
| CN104181547A (en) * | 2014-08-26 | 2014-12-03 | 西安交通大学 | Three-dimensional laser imaging system and method based on array detection unit |
| CN105572683A (en) * | 2016-02-03 | 2016-05-11 | 深圳市镭神智能***有限公司 | Laser radar acquisition and ranging apparatus and working method thereof |
| CN105652336A (en) * | 2016-01-14 | 2016-06-08 | 东南大学 | Pyramid-type light source tracking detector |
| CN107219532A (en) * | 2017-06-29 | 2017-09-29 | 西安知微传感技术有限公司 | Three-dimensional laser radar and distance-finding method based on MEMS micro scanning mirrors |
| US20190195809A1 (en) * | 2017-12-22 | 2019-06-27 | Regents Of The University Of Minnesota | 3d graphene optical sensors and methods of manufacture |
-
2020
- 2020-10-15 CN CN202011100770.5A patent/CN112240760A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201233534Y (en) * | 2007-10-15 | 2009-05-06 | 顾杰 | Precise automatic tracking system for sun |
| CN104181547A (en) * | 2014-08-26 | 2014-12-03 | 西安交通大学 | Three-dimensional laser imaging system and method based on array detection unit |
| CN105652336A (en) * | 2016-01-14 | 2016-06-08 | 东南大学 | Pyramid-type light source tracking detector |
| CN105572683A (en) * | 2016-02-03 | 2016-05-11 | 深圳市镭神智能***有限公司 | Laser radar acquisition and ranging apparatus and working method thereof |
| CN107219532A (en) * | 2017-06-29 | 2017-09-29 | 西安知微传感技术有限公司 | Three-dimensional laser radar and distance-finding method based on MEMS micro scanning mirrors |
| US20190195809A1 (en) * | 2017-12-22 | 2019-06-27 | Regents Of The University Of Minnesota | 3d graphene optical sensors and methods of manufacture |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101663561B (en) | Multiple-point measuring method and survey instrument | |
| CN108426526B (en) | Space multi-target vertical target parameter testing device and testing method | |
| EP1024342B1 (en) | Automatic surveying equipment and three-dimensions measuring method | |
| CN108332708B (en) | Automatic detection system and detection method for laser level meter | |
| JP2013190272A (en) | Three-dimensional laser measuring apparatus and three-dimensional laser measuring method | |
| CN110208771B (en) | Point cloud intensity correction method of mobile two-dimensional laser radar | |
| CN108981589B (en) | Device and method for measuring cup rim height | |
| EP3435028B1 (en) | Live metrology of an object during manufacturing or other operations | |
| CN102455425A (en) | Panoramic photoelectric radar and scanning method utilizing ground object image positioning | |
| CN109416252B (en) | Method for comparing a received radiation incident on a laser receiver with a rotating received radiation | |
| CN109313027B (en) | Method for comparing a received beam projected onto a laser receiver with a rotating laser beam | |
| CN107345789A (en) | A kind of pcb board hole location detecting device and method | |
| CN112595236A (en) | Measuring device for underwater laser three-dimensional scanning and real-time distance measurement | |
| CN101726316A (en) | Element of interior orientation and distortion tester | |
| KR900006577B1 (en) | Checking device of shape | |
| CN112240760A (en) | Laser swinger detector assembly and method for estimating swinger laser position | |
| Valocký et al. | Measure distance between camera and object using camera sensor | |
| CN201277864Y (en) | Inner orientation element and distortion test instrument | |
| TW201940840A (en) | Appearance inspection device | |
| CN115902816A (en) | Automatic measuring system for engineering measurement | |
| US5321495A (en) | Optical detecting system for determining particle position on a substrate | |
| CN104697487B (en) | A kind of plane normal azimuth measuring method and its application | |
| JPH116711A (en) | Method for measuring calibration value of image pickup unit for measurement | |
| CN112557769A (en) | On-chip antenna test system and test method | |
| CN111130456B (en) | Method and system for detecting buoyancy loss of overwater photovoltaic array |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210119 |