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PSD accurate measurements with low-reflective material of soft

Position. PSD and CCD compared with the fast response, continuous sampling, high position resolution, position output and light intensity, spot size has nothing to do with the spot center is only relevant, but does not require complicated optical focusing system and so on. Therefore, by a wide range of applications. PSD is suitable for use in infrared light and low-resolution soft materials detection. The use of PSD measurement system has some of the advantages mentioned above,[link widoczny dla zalogowanych], makes PSI) in recent years, soft materials with low reflectivity of the detection. Increasingly wide range of applications, showing that it is in the industrial field has broad application prospects. 74 Sichuan University (Engineering Science Edition) 32, PSD when used with the semiconductor laser, focusing lens,[link widoczny dla zalogowanych], imaging lens composed of non-contact laser triangulation position sensor system. The use of semiconductor lasers, so that the whole measurement system is small, while the direction of a good semiconductor laser, optical power high, so high resolution measurement system, as used in conjunction with the computer,[link widoczny dla zalogowanych], can be composed of a high degree of automation, intelligent measurement system. Is testing a car air filter paper corrugation depth, full-height, for example, that it works. Shown in Figure 1, the semiconductor laser light emitted by 2,6 3,5 condenser lens focus to test the filter paper surface, is reflected by the imaging lens 811 on the PSD. Symmetrically placed two PSD, when measured with the table moving filter paper, filter paper formed on the surface laser scanning, PSD filter paper to determine the peaks and troughs, the test pieces of the peaks and troughs of the changes into electrical signals, into the computer processing, which measured the depth of the corrugated filter paper and full height. Corrugation depth = / n = full height. / Where. Point group for the first corrugation depth f,[link widoczny dla zalogowanych], '= (1 a f-1 a f +2 a f-2 one. A _ called �� i + Vx ... + as the first point of the whole group of corrugated high, n is the sensor 1 i-a great value. ... The first one for the sensor minimum 1, ... f the sensor 2, a maximum value of the first, 2 for the sensor 2, the first a minimum, K is the structure constant, the number of groups . l, 7 power; 2,[link widoczny dla zalogowanych],6. Semiconductor laser; 3,5. focus lens; 4. the workpiece 8,�� lens; 9,12 PsD; lO13.PsD processing circuit; 14�� 5 shows the computer system: 16 Print Schematic diagram 1P print job singing Yu m0f ng.1Theh swollen blood lIedi Rights detection accuracy with 2 precision measurement repeatability and error of indication that shown in Figure 2, Figure 3: We do use the PSD detector equipment. filter paper and corrugated depth and full-height detector, the instrument's measurement range 120rflm �� 40rflm. instrument resolution +5 nun, measurement repeatability of <1%. of automotive filter paper filter to do 1O times, and the results for the average waviness 0.353, 0.8%, the average full-high 0.878 at 1.2%. can be seen from the above description, with the PSD instruments to measure the composition of low reflectivity measurement t Figure 2 filter paper plant refolding �� .2 Repe-mail Xiu Xiu Ml rate of soft material with many advantages compared to other measurement methods and reliable measurement accuracy, the testing industry in the future will have broader prospects. l0l0r �� the amount of {1006 �� 1002 din * 0998 051 015 one by one the number of loop 3 filter paper measurement error of indication Yuan pull measurement repeatability �� .3 Error deleting cut butterfly ty0fM bird's-eye view of arsenic used to stare at 3 Conclusion Detection of soft materials under test conditions due to the restrictions, generally unexpected, or Gaigu, Even if the measurement is to use simple methods, such as projection, etc., detection accuracy is very low. With the development of science and technology, the use of soft materials, more and more broad, also called for improved detection accuracy. such as automotive gasoline, oil filter filter paper, in the production process requires its detection, we use the PSD system designed testing equipment for the production of filter paper addresses the testing requirements, the instrument resolution of 5 arsenic, filter paper measurement repeatability < 1% but the article on the reflectivity of strong materials detection is not fully applicable, according to the specific conditions to improve, to achieve the requirements. References: [1] later linked to the pure, Zhou Weidong filter ripple depth and full-height analyzer [J] , Automotive Technology .1994, (6): 23 ~ 27 [2] Chi Kwai pure. Zhouzhao Fei, Zhou Weidong. Laser in Measurement and Testing Technology Application [M], Chengdu: Chengdu Science and Technology Press, 1994. [3] Cheng Road. laser diffuse scattering on the surface - a simplified statistical model [J]. Physics, 1978, (1��) :35-39. (Editor HE Wei) �� few ��. A �� iv \ Butterfly Lei + shouted + n ('__ a ~

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