CN203100681U - Portable non-contact dimension measuring apparatus - Google Patents
Portable non-contact dimension measuring apparatus Download PDFInfo
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- CN203100681U CN203100681U CN 201320135791 CN201320135791U CN203100681U CN 203100681 U CN203100681 U CN 203100681U CN 201320135791 CN201320135791 CN 201320135791 CN 201320135791 U CN201320135791 U CN 201320135791U CN 203100681 U CN203100681 U CN 203100681U
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- measuring apparatus
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- 238000005259 measurement Methods 0.000 claims abstract description 14
- 239000004973 liquid crystal related substance Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 description 9
- 230000005484 gravity Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model discloses a portable non-contact dimension measuring apparatus. The portable non-contact dimension measuring apparatus is used for acquiring a measured object image by a CCD (Charge Coupled Device) and measuring the dimension by utilizing a DSP (Digital Signal Processor) image processing algorithm. The portable non-contact dimension measuring apparatus is lower in cost, simple to operate and suitable for non-contact high-precision dimension measurement.
Description
Technical field:
The utility model relates to a kind of noncontact dimension measuring device, specifically a kind of portable noncontact dimensional measurement instrument.
Background technology:
Contactless dimension measurement method is commonly used projection gridding method, digital camera method, digital image method etc.Patent 201110124347.3 discloses tower defect length measuring method in a kind of noncontact coils of hot-rolled steel, adopts the projection grid, calculates length by the bright dark frame counter of number, and this method needs artificial counting, can't instrumentation.Patent 201120141911.8 discloses a kind of device of non-cpntact measurement sheet metal strip burr height, and it uses digital camera to take the burr photo, with milscale index dial survey measurements, though this device is portable, and still can't instrumentation.Patent 201110119174.6 discloses a kind of picture size measuring method, and this method utilizes image pick-up card and Matlab Flame Image Process to calculate physical dimension, and this method need dispose computing machine, is not easy to carry.
Summary of the invention:
The purpose of this utility model is to provide a kind of portable non-contact measuring device at the deficiencies in the prior art.This instrument adopts CCD and monolithic DSP microprocessor to carry out non-cpntact measurement, and the measuring accuracy height is easy and simple to handle, is easy to carry.
The technical solution of the utility model:
Put the measured object surface by projection two parallel lasers, CCD gathers two luminous points and measured object surface image, and DSP handles image, looks like to do Pixel Dimensions by dot pattern and demarcates, and calculates the measured object size.
DSP can adopt the TMS320DM642 chip, utilizes grey scale centre of gravity algorithm computation laser spots spot center, again by its size of measured object image calculation.
The measurement result of this instrument also can be transferred in data-carrier store or the database by wired or wireless mode.
The beneficial effects of the utility model are: compared with the prior art, the utility model is a kind of portable non-contact measuring device based on CCD and DSP, adopts common image processing program, algorithm is simple, and the measuring accuracy height is easy and simple to handle, easy to carry, cost is very limited.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Mark among the figure: 1 laser tube, 2CCD, 3DSP image processor, 4 liquid crystal displays, 5 shells, 6 measured objects.
Embodiment:
As shown in Figure 1, portable noncontact dimensional measurement instrument.Comprise 1 laser tube, 2CCD, the 3DSP image processor,
4 liquid crystal displays, 5 shells, 6 measured objects.
Described laser tube 1 sends two parallel lasers, is fixed on the shell 5.
Described DSP image processor 3 can adopt the DSP embedded based on the TMS320DM642 chip, and measurement result is presented on the small size liquid crystal display 4, is convenient to the measurement mechanism instrumentation.Measurement result also can be transferred in data-carrier store or the database in wired or wireless mode by the serial communication interface of DSP, as connect serial ports USB module and can be recorded on the USB flash disk file, connecing serial ports SD module can be recorded on the part of SD Cavan, connect the serial ports wireless module can with the server database wireless connections, also can be connected on the net by the network interface of DSP.
Laser tube 1 sends the directional light of 650nm wavelength, incides on the measured object surface, and the CCD2 images acquired, DSP image processor 3 calculates measured object 6 sizes.Measuring principle is as follows:
As shown in Figure 1, establish two laser spots distance and be d, luminous point spacing pixel on image is s, and measured object pixel on image is a, measured object size b computing formula is then arranged: b=(a*d)/s.
Wherein distance s is obtained by image processing program.Adopt the grey scale centre of gravity formula:
In the formula T be dot pattern as gray threshold, f is each gray values of pixel points, x and y are luminous point gray scale centre coordinates.The difference of two luminous point grey scale centre of gravity coordinates is distance s.
The grey scale centre of gravity arithmetic accuracy is 0.02 pixel, and as corresponding 0.1 millimeter of every pixel in the image processing system, this device luminous point stated accuracy is 0.002 millimeter.
Claims (2)
1. portable noncontact dimensional measurement instrument, it is characterized in that: laser tube (1) is housed on the shell (5), one side is embedded with liquid crystal display (4), opposite side fixation of C CD(2), there is DSP image processor (3) shell (5) inside, and laser tube (1) sends two directional lights, incides on the measured object (6), DSP image processor (3) calculates measured object (6) size, and the result is presented on the liquid crystal display (4).
2. a kind of portable noncontact dimensional measurement instrument according to claim 1, it is characterized in that: measurement result also can be transferred in data-carrier store or the database by wired or wireless mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320135791 CN203100681U (en) | 2013-03-22 | 2013-03-22 | Portable non-contact dimension measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320135791 CN203100681U (en) | 2013-03-22 | 2013-03-22 | Portable non-contact dimension measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203100681U true CN203100681U (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320135791 Expired - Fee Related CN203100681U (en) | 2013-03-22 | 2013-03-22 | Portable non-contact dimension measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203100681U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411535A (en) * | 2013-08-07 | 2013-11-27 | 北京信息科技大学 | Variable weight image point location method for return light reflection marker |
| CN103528522A (en) * | 2013-10-30 | 2014-01-22 | 北京理工大学 | Embedded machine tool cutter image detection device |
| CN104567714A (en) * | 2013-10-15 | 2015-04-29 | 胡长华 | Portable non-contact roundness measurement instrument |
| CN106289064A (en) * | 2016-10-18 | 2017-01-04 | 上海船舶工艺研究所 | A kind of portable boat rib of slab position line detector |
-
2013
- 2013-03-22 CN CN 201320135791 patent/CN203100681U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411535A (en) * | 2013-08-07 | 2013-11-27 | 北京信息科技大学 | Variable weight image point location method for return light reflection marker |
| CN103411535B (en) * | 2013-08-07 | 2015-08-05 | 北京信息科技大学 | A kind of Changeable weight picture point localization method for retro-reflective target |
| CN104567714A (en) * | 2013-10-15 | 2015-04-29 | 胡长华 | Portable non-contact roundness measurement instrument |
| CN103528522A (en) * | 2013-10-30 | 2014-01-22 | 北京理工大学 | Embedded machine tool cutter image detection device |
| CN106289064A (en) * | 2016-10-18 | 2017-01-04 | 上海船舶工艺研究所 | A kind of portable boat rib of slab position line detector |
| CN106289064B (en) * | 2016-10-18 | 2019-10-22 | 上海船舶工艺研究所 | A portable detection device for ship plate rib position line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20160322 |
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| CF01 | Termination of patent right due to non-payment of annual fee |