CN2375947Y - Dimensional measuring instrument using linear parallel laser light source and linear array detector - Google Patents
Dimensional measuring instrument using linear parallel laser light source and linear array detector Download PDFInfo
- Publication number
- CN2375947Y CN2375947Y CN 98225931 CN98225931U CN2375947Y CN 2375947 Y CN2375947 Y CN 2375947Y CN 98225931 CN98225931 CN 98225931 CN 98225931 U CN98225931 U CN 98225931U CN 2375947 Y CN2375947 Y CN 2375947Y
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- array detector
- linear array
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- light source
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- Length Measuring Devices By Optical Means (AREA)
- Laser Beam Processing (AREA)
Abstract
The utility model discloses a dimension measuring instrument which adopts a linear parallel laser light source and a linear array detector and which is composed of a laser beam expansion unit, a linear array detector receiving unit, and a signal processing, analyzing and displaying unit. The magnification factor of a beam-expanding optical system of the utility model can be optionally changed without any aberration, and the divergence angle of the linear parallel light source can reach diffraction limit. The utility model has the advantages of convenient adjustment, low cost and good application.
Description
The utility model relates to laser measuring technique.
The laser measurement size belongs to non-cpntact measurement, and this measurement is the precision height not only, and can measure in real time moving object, therefore aspect automatic detection of industry and the control high practical value is being arranged.At present, the domestic laser scanning method production dimensional measurement instrument that still abroad mainly all adopts, its structure is seen accompanying drawing 2, mainly is by laser scan unit, photoelectricity receiving element and signal Processing, analysis and display unit are formed.The gauging instrument of this structure needs to expand bundle and imaging optical system, and its measuring accuracy is also mainly by expanding the decision of bundle and imaging optical system enlargement factor and aberration (as the curvature of field, aberration, astigmatism, distortion); This gauging instrument will be with custom-designed multi-disc compound lens and non-spherical lens, will be above the requirement of measuring accuracy otherwise expand the measuring error that bundle and imaging optical system cause.And expand not only cost height of bundle and imaging optical system, and large-sized expansion bundle and imaging system (diameter is above 300 millimeters) process also very difficult, Here it is have laser scanning method production gauging instrument the defective that can't overcome.
The purpose of this utility model just provides a kind of gauging instrument that adopts linear parallel LASER Light Source and linear array detector, and its manufacturing process is simple, low price.
Below in conjunction with accompanying drawing, the utility model is elaborated.
Structure of the present utility model is as shown in Figure 1: be by laser beam expanding unit (9), these three unit of linear array detector receiving element (10) and signal Processing, analysis and display unit (11) are formed.Laser beam expanding unit (9) restraints little prism (2) by laser instrument (1) and in the expansion that beam direction is placed, expand that bundle big prism (3) and cover glass window (4) form; Linear array detector receiving element (10) is made up of cover glass window (5), linear array detector (6) and the linear array detector driving circuit (7) placed on same horizontal line with cover glass window (4); The circuit of linear array detector driving circuit (7) and signal Processing, analysis and display unit (11) is seen accompanying drawing 3: the signal adjustment is amplified (21) and is connect A/D conversion (22), connects data buffer (23) again, connects random access memory (24) again; Logic control element (25) connects A/D conversion (22), also links to each other with processor controls (27); Processor controls (27) also is connected with data device (29); Data device (29) connects computing machine (30), also amplifies (21) with signal condition and links to each other; Processor controls (27) is amplified (21) with bus driver (28), signal condition and is connected.
During the utility model work; workpiece to be measured (8) is placed between cover glass window (4) and (5); start laser instrument; laser beam expands into the linear parallel light source through expanding bundle low-angle prism (2) and expanding bundle big prism (3) with laser beam, and these directional lights shine on the workpiece to be measured (8); again through CCD receiving element (10) received signal; generally just can reach the requirement of required precision,, adopt 2 line array CCDs to get final product the measurement of large scale workpiece for measurement with a slice line array CCD chip.The video level of ccd detector (6) output amplifies (21) through signal condition and becomes with A/D conversion (22) incoming level and be complementary.Amplify the vision signal of (21) through signal condition and send into the high-speed data acquistion system that A/D conversion (22) constitutes for core, become digital signal and deposit random access memory (24) in, send data output again, after long line sends computing machine (30) to and analyzes, show physical size, the error of measuring workpieces, and provide control signal and dimension overproof warning.
The utility model has the advantages that the enlargement factor of beam expander optical system is arbitrarily variable and do not have any aberration; The angle of divergence of linear parallel light source can reach diffraction limit, and easy to adjust, and low price (price only be lens beam expander optical system 1/7th) for this reason, has fabulous application prospect.
Description of drawings:
Fig. 1 is a structural drawing of the present utility model;
Fig. 2 is a prior art laser scanning method gauging instrument;
Fig. 3 is the circuit diagram of linear array detector driving circuit and signal Processing, analysis and display unit.
Among the figure: 1, laser instrument; 2, expand the little prism of bundle; 3, expand the big prism of bundle; 4,5, cover glass window; 6, linear array detector; 7, linear array detector driving circuit; 8, workpiece for measurement; 9, laser beam expanding unit; 10, linear array detector receiving element; 11, signal Processing, analysis and display unit; 12, rotating mirror; 13, extender lens; 14, imaging lens; 15, photodetector; 16, laser scan unit; 17, photoelectricity receiving element; 21, signal condition amplifies; 22, A/D conversion; 23, data buffer; 24, random access memory; 25, logic control element; 26, address generator; 27, processor controls; 28, bus driver; 29, data device; 30, computing machine.
Claims (2)
1. a gauging instrument that adopts linear parallel LASER Light Source and linear array detector is characterized in that, is by the laser beam expanding unit, linear array detector receiving element and signal Processing, analysis and display unit, and these three unit are formed.
2. gauging instrument as claimed in claim 1 is characterized in that,
A. the laser beam expanding unit is by laser instrument, and restraints little prism in the expansion that beam direction is placed, and expansion big prism of bundle and cover glass window are formed;
B. the linear array detector receiving element is by another cover glass window of placing on same horizontal line with the cover glass window, and linear array detector and linear array detector driving circuit are formed;
C. the circuit of linear array detector driving circuit and signal Processing, analysis and display unit is: signal adjustment amplification connects the A/D conversion, connects data buffer again, connects random access memory again; Logic control element connects the A/D conversion, also links to each other with processor controls; Processor controls also is connected with the data device; The data device connects computing machine, also amplifies with signal condition to link to each other; Processor controls and bus driver, signal condition amplifies connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98225931 CN2375947Y (en) | 1998-01-24 | 1998-01-24 | Dimensional measuring instrument using linear parallel laser light source and linear array detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98225931 CN2375947Y (en) | 1998-01-24 | 1998-01-24 | Dimensional measuring instrument using linear parallel laser light source and linear array detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2375947Y true CN2375947Y (en) | 2000-04-26 |
Family
ID=33976527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98225931 Expired - Fee Related CN2375947Y (en) | 1998-01-24 | 1998-01-24 | Dimensional measuring instrument using linear parallel laser light source and linear array detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2375947Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957184A (en) * | 2010-10-15 | 2011-01-26 | 南京信息工程大学 | Generation device and method of parallel light path in vertical direction |
| CN103438805A (en) * | 2013-08-19 | 2013-12-11 | 长春理工大学 | Refraction-amplifying optical displacement sensor |
| CN106124562A (en) * | 2016-06-22 | 2016-11-16 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of Liquid water content measuring method |
-
1998
- 1998-01-24 CN CN 98225931 patent/CN2375947Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957184A (en) * | 2010-10-15 | 2011-01-26 | 南京信息工程大学 | Generation device and method of parallel light path in vertical direction |
| CN103438805A (en) * | 2013-08-19 | 2013-12-11 | 长春理工大学 | Refraction-amplifying optical displacement sensor |
| CN106124562A (en) * | 2016-06-22 | 2016-11-16 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of Liquid water content measuring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |