SU1298531A1 - Photopulse method of measuring object dimensions - Google Patents

Abstract

The invention relates to the field of engineering, in particular to the measurement technique. The aim of the invention is to improve the measurement performance due to the simultaneous passage of radiation beams from different parts of the object under test by simultaneous reading of radiation beams. Two narrow, parallel collimated beams of radiation are formed, and a formation scan is performed. in opposite directions parallel to each other. The beams of the optical element 3 are deflected onto the controlled parts of the object 10 and 11. Each of the beams, not shielded by the corresponding part of the object, is projected onto one and the same photodetector 8 by means of one of the mirrors 4, 5 and one of the lenses 6, 7. Light beams at the output of the photodetector create two intervals with different intensity. According to the duration between intervals, taking into account the known constant scanning speed of the beams in the processing unit 9, the difference of the heights of the different parts of the object being monitored is judged. 2 Il. with S (L S

Description

The invention relates to a measuring technique and can be used to measure the linear dimensions of objects and the difference in height of their parts in mechanical engineering and instrument making.

The aim of the invention is to improve the performance of the measurement and also to determine the equal height of the object due to the simultaneous deployment by the intersecting beams of radiation of different parts of the object being monitored.

FIG. 1 is a schematic diagram implementing this method; FIGS. -2 show timing diagrams explaining the definition of the difference in height of the monitored object.

The diagram shows the radiation source 1, the device 2 forming and

Both scanner beams, the projection scanning two parallel narrow 2.0 lines on the same photodetector, radiation beams, the deflecting element create two consecutive time3, for example a prism, mirrors 4 and 5, focusing lenses 6, 7, photoreceiver 8, electronic processing unit 9 and registration.

The diagram also indicates the opposite parts of the object under test 10 and 11 and the extreme positions of the narrow moving beams 12–15 of radiation.

The proposed method is carried out as follows.

From the collimated beams of the radiation source 1, two narrow parallel beams are formed in the device 2 and using the same node, the generated beams are scanned in

25

change the interval (Fig. 2) O - t, LC with radiation intensity 1-1 +1 and tj, -t ;, btj with intensity either 1 or 1, depending on the position of the objects 10, 11 measurements, and

Whatx, a — By the length of the time intervals t, and by the i amplitude of intensity judged by the size being measured. For example, ah is determined by the duration of Atj, i.e. by one measurement at a time, as in the known devices, two measurements are made with an increment of 35 by the following subtraction.

Claims (1)

Claims. thirty opposite directions one parallel to the other. The beams deflect The photopulse method of measurement by the element 3 in opposite directions of the object's dimensions, which consists of controllable parts by the object that forms the radiation beam, that are 10 and 11. Each unshielded part of which is smaller than the size of the horse arms with an object using one. of the object being monitored, scanning the beam from mirrors 4 and 5 directing the object to be monitored, projected onto lens 6 or 7, which is placed on the photodetector, recorded on the photodetector 8, is the duration of time between the moment which is common for them, From the exit of the photos, the beginning of the sweep and the intersection of the receiver 8 is an electrical signal, the pro-beam of one of the object's boundaries and the actual value of the light signal of the size of the product, at its entrance, it is fed to block 9 50, which, in order to increase the efficiency of measurement, form a second beam of radiation, similar to the first, scan them in a direction parallel to processing and registration, where the duration of the signal from each part of the controlled object is judged on ve. the image of their different height. The difference in height between the objects of measurement 55 scanned by the first beam, and it is possible to imagine how, where and h are the distances from the initial position of the scanning radiation 12 and 14 respectively to the upper ends of the parts of the object 10 and 11 measurements. Since the scanning radiation has a constant scanning speed V, we can write: ek where t. H-v ,, (t, -t,) V, ut. f " five the time between the start of scanning of the formed beam 12 and the beginning of its shielding by the controlled object, the time between the start of scanning the second beam and its shielding by another part of the object; where t is the total scan time of the beams. Both scan beams projected at t tc .0 on the same photodetector, create two consecutive in time. change the interval (Fig. 2) O - t, LC with radiation intensity 1-1 +1 and tj, -t ;, btj with intensity either 1 or 1, depending on the position of the objects 10, 11 measurements, and Whatx, a — By the length of the time intervals t, and by the i amplitude of intensity judged by the size being measured. For example, ah is determined by the duration of Atj, i.e. by one measurement at a time, as in the known devices, two measurements are made with an increment of 35 by the following subtraction. Claims. thirty temporarily with it design it on the same photodetector, record the length of time between the moment 3112985314 The beginning of the sweep of the second beam is determined by the difference in the duration of the beam crossing the other time limit of the sweep of its opposite object, and the controlled parameter boundaries.