Optoelectronic device for measuring the position of the mechanism

 

(57) Abstract:

The invention relates to measurement techniques, in particular, to devices for measuring opto-electronic position mechanisms. The technical result of the use of the invention is to improve the accuracy of position measurement. The technical result is achieved by the fact that in the process of measuring the distance to the object is minimized measurement error occurring due to the presence of the object curvature and spatial angular movements of the mechanism that has opto-electronic measuring device. The device includes an optical transmitting system, receiving system, which includes the lens 6, the spatio-temporal modulator 14 light, Fourier Converter 15, the binary filter 16 spatial frequency, position-sensitive receivers 9, 10, path processing, which includes blocks 7, 11, 12, 19, 20. On an analog switch 20 receives a signal from a channel, organized by blocks 21, 22, 23, 25, and spatio-temporal modulator 14 of the light signal with an additional transducer 26 pulses. On the recording device 8 receives the signal of a given duration in time is related to the measurement technique, in particular, to devices for measuring opto-electronic position mechanisms.

The closest in technical essence and the achieved result of the proposed device is an opto-electronic device for measuring the position of the mechanism containing base, installed the power source, the radiation source and forming a system, additional system-forming lens installed in the reflected light from the object stream, the comparator recording device, two optical receiver, placed in series with the first amplifier and an adder.

A disadvantage of the known opto-electronic device for measuring the position of the mechanism is the low accuracy of the measurement results due to the fact that the mechanism with a pre-installed measuring system performs spatial angular displacement, and the surface of the object, the distance is measured, has a curvature.

The aim of the invention is to improve the accuracy of measuring the position of the mechanism.

The objective is achieved by the fact that the known opto-electronic device for measuring the position of the mechanism containing the basis for the expansion of the system, the lens installed in the reflected light from the object stream, the comparator recording device, two optical receiver, placed in series with the first amplifier and the adder is supplied installed on the basis of the spatial light modulator forming with the light source and forming a system of transmitting optical system, a spatial-temporal light modulator, Fourier Converter and binary filter spatial frequency, mounted in series along the light beam between the lens and the optical receivers and forming with them a receiving optical system, additional radiation source and installed in the course of the light beam turning mirror, installed in front of the lens and optically connected with an additional source of radiation through additional forming system, amplifier-shaper, an analog switch, an accelerometer, a gate pulse shaper, the primary and secondary lines of delay, one-shot and an additional pulse shaper, the output of the accelerometer is connected to the input of the gate pulse shaper, the output of which is connected in parallel with the one-shot control input analog switch, the output of the additional delay line is connected to the input of the pulse shaper, the output of which is connected to the electrical input of the space-time light modulator, optical receivers made position-sensitive, the first of them is designed to determine the coordinates of the center of the spot, the second to determine the spot size and is connected to the input of the comparator, the output of which is connected to the input of the amplifier-shaper, the output of which is connected with the second input of the adder, the output of the adder is connected to the input of analog switch, its output with the input of the recording device, the additional radiation source optically connected to an optical receiver via an additional forming system, swivel mirror, lens, the spatio-temporal light modulator, the Fourier transform of the binary Converter and filter spatial frequency, and the axis of sensitivity of the accelerometer is parallel to the optical axis of the lens.

The drawing shows a diagram of the opto-electronic device for measuring the position of the mechanism.

Optoelectronic device for measuring the position of the mechanism comprises a base 1 installed on it source 2 power, th reflected from an object light flux, the comparator 7, the recording device 8, two optical receiver 9, 10, placed in series with the first amplifier 11 and the adder 12. On the base 1 also has a spatial modulator 13 of the light, forming with the radiation source 3 and a forming system 4 transmits the optical system. Spatio-temporal modulator 14 light, Fourier Converter 15 and the binary filter 16 spatial frequency determined on the basis of successively along the light beam between the lens 6 and the optical receivers 9, 10, forming with them receiving optical system. Also opto-electronic device provides an additional source 17 radiation and installed in the course of the light beam turning mirror 18. It is installed in front of the lens 6 and optically connected with an additional source 17 radiation through additional forming system 5. The device comprises an amplifier-shaper 19, an analog switch 20, the sensor 21 acceleration, the driver 22 and the gate pulse, the core 23 and an additional 24 lines of delay, one-shot 25 and additional shaper 26 pulse. The output of the acceleration sensor 21 is connected to the input of the driver 22 and the gate pulse, the output of which is sequentially and connected to the one-shot 25 and control input analog switch 20, the additional output of the delay line 24 is connected to the input of the shaper 26 pulse, the output of which is connected to the electrical input of the spatio-temporal modulator 14 of the light. Optical receivers 9, 10 made of the position-sensitive. The first receiver 9 is designed to determine the coordinates of the center of the spot, the second 10 - to determine the spot size and is connected to the input of the comparator 7, the output of which is connected to the input of the amplifier-shaper 19, the output of which is connected with the second input of the adder 12, the output of the adder 12 is connected to the input of analog switch 20, the output to the input of the recording device 8. An additional source 17 radiation is optically connected with the optical receivers 9,10 through additional forming system 5, the rotary mirror 18, a lens 6, the spatio-temporal modulator 14 light, Fourier Converter 15 and the binary filter 16 spatial frequency, and the axis of sensitivity of the sensor 21 accelerations parallel to the optical axis of the lens 6. From the power source 2 are provided with necessary food elements.

Optoelectronic device for measuring the position of the mechanism relative to the object (link Executive sistergirls system 4, at the output of which forms a parallel beam of a given diameter is directed to a spatial modulator 13 of the light. A beam of monochromatic light beam spatially modulated in intensity in accordance with the law Sin X-axis and is directed at the surface of the object, the distance to which is measured. The image of the light beam on the object formed by the lens 6 on photocontinental environment spatio-temporal modulator 14 and recorded. At the time of registration on the spatio-temporal light modulator receives a pulse from the secondary shaper 26 pulses whose duration is equal to t/2 (half the duration t gate pulse). When this impulse is delayed an additional line 24 delay time t with respect to the gate pulse.

Spatial angular displacement (with periodic nature of the mechanism that has opto-electronic device for measuring the position of the mechanism, as well as the curvature of the surface of the object, the distance to which is measured, leads to the fact that the period reflected spatially modulated radiation registered spatiotemporal modulat image length of the coherent radiation from the source 17 is converted to plane-parallel beam after forming system 5, mirrors 18 and lens 6.

Plane-parallel beam passes through the spatial-temporal modulator 14 light dirigeret on the spatial charge structure of space-time modulator 14 of the light and goes to the input of the Fourier Converter 15. The charge structure in turn is formed by the image spatial-modulated radiation reflected from the object distance is determined. In the Fourier plane of the transducer 15 are formed of a light diffraction spots 0, +1 and -1 orders.

Binary filter 16 spatial frequency allocates diffraction beams +1 and -1 order, the location of which relative to the optical axis of the Fourier Converter characterizes the distance to the object.

Light diffraction spot +1 order falls on a position-sensitive receiver 9. The displacement of the diffraction spot +1 order with respect to the optical axis is proportional to the distance of the object.

An electrical signal proportional to the displacement of the light spot, from the receiver 9 to the input of the amplifier 11, and with its output to the input of the adder 12. Light diffraction spot -1 order is converted by the optical receiver 10, compartirse angular displacement mechanism, running the device for measuring the distance to the object, and the curvature of the surface of the object.

In the adder 12 is the subtraction of the error signal of the optical receiver 10 of the optical signal receiver 9. Thus, at the output of the adder 12 is a signal proportional to the distance between the mechanism and the object taking into account the curvature of the surface of the object and the spatial angular movements of the mechanism carrying the measuring opto-electronic device. From the output of the adder 12, the signal received at the input of analog switch 20.

The point at which the value of the measured distances is fed to the input of the recording device 8, is determined by introducing into the device measuring path, which includes the elements of the device 21, 22, 23, 25. Information signal from the sensor 21 linear acceleration to the input of the driver 22 and the gate pulse, which is filtered low-frequency component of the spectral density of the active accelerations (arising from the spatial angular movements of the mechanism) and the formation of a rectangular pulse whose duration is equal to the duration t of the negative pauperis is fed to the input of one-shot 25. The duration of the pulse generated by one-shot 25 is determined by the time during which you must have the information signal to a recording device 8. Output the one-shot 25 signal at the control input analog switch 20, and at the input of the recording device 8 is recorded an information signal on the distance to the object.

The registration corresponds to a point in time at which the mechanism has a minimum value of the amplitude of the spatial angular movements that allows the measurement of distances between the mechanism and the object with a high degree of accuracy.

Thus, measuring the distance between the mechanism and the object occurs at a time interval corresponding to the locating mechanism in the area of the minimum values of the amplitudes of the angular displacements.

Opto-electronic device can be used in automated systems in the process synchronize technological operations Executive links mechanisms.

Optoelectronic device for measuring the position of the mechanism containing base, installed the power source, the radiation source and the light flux, two optical receiver and cascaded with the first amplifier and the adder, comparator, register device, characterized in that it has established on the basis of the spatial light modulator forming with the light source and forming a system of transmitting optical system, established on the basis of the spatio-temporal light modulator, Fourier Converter and binary filter spatial frequency, optically coupled and mounted in series along the light beam between the lens and the optical receivers and forming with them a receiving optical system, additional radiation source and installed in the course of the light beam and optically connected via an additional forming system turning mirror in front of the lens and optically connected to it, the amplifier-shaper, an analog switch, an accelerometer, a gate pulse shaper, the primary and secondary lines of delay, one-shot and an additional pulse shaper, the output of the accelerometer is connected to the input of the gate pulse shaper, the output of which is connected in parallel with the one-shot control input analog switch, the output of the additional delay line is connected to the input of the pulse shaper, the output of which is connected to the electrical input of the space-time light modulator, optical receivers made position-sensitive, the first of them is designed to determine the coordinates of the center of the spot, the second is to determine the spot size and is connected to the input of the comparator, the output of which is connected to the input of the amplifier-shaper, the output of which is connected to the second input of the adder, the output of the adder is connected to the input of analog switch, output it to the input of the recording device, the additional radiation source optically connected to an optical receiver via an additional forming system, mirror, lens, the spatio-temporal light modulator, the Fourier transform of the binary Converter and filter spatial frequency, and the axis of sensitivity of the accelerometer is parallel to the optical axis of the object.

 

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