RU1066355C - Optoelectronic converter - Google Patents

Description

The invention relates to automation and computer technology and can be used in the control systems of the executive bodies of aircraft.

S main invention auth.St. Ns 5; 925195 describes an optical motion converter to code containing a binary code scale, V-arranged emitters and photodetectors, and a V-code conversion unit, while the cathodes and 0 anodes of the photo-receivers are respectively combined and connected to the information inputs of the V-code conversion unit, control The outlets of which are connected to the cathodes of the emitters, the cathode of the radiators in each discharge, beginning with the second, are interconnected, the anodes of the radiators are combined in the section of advance, lagging and lagging areas 4en to the corresponding inputs of the conversion unit 20. In the described movement to code converter, the V-code conversion unit contains a generator, a driver, a shift register, a block of key elements, juices, 25 trigger, an inverter and a comparator, the inputs of which are connected to the information inputs of the block V-code conversion, and the comparator output is connected to the direct one and through inverter-with inverse trigger inputs, 30 of which are direct and inverse outputs are connected to the control inputs of the first and second key respectively elements, the outputs of the key elements are connected to the corresponding inputs of the V-icod conversion unit, the output of the generator is connected to the input of the former, the installation output of which is connected to the installation (trigger and shift register inputs, the outputs of which are connected to the inputs of the key elements , the outputs of the key-element block are connected to the control inputs of the V-code conversion block, the clock output of the driver is connected to the clock inputs of the shift register and the trigger, the control output, Atel connected to the data input of the shift register.

The specified transducer transducer converts the angular or linear displacement into a normal binary code with a minimum consumption of electrical energy necessary for illumination of V-arranged 55 emitters and the volume of electronic circuits needed to convert the mask code read by V-located photoreceivers into normal binary code.

The disadvantage of this optoelectronic displacement transducer to the code is the reduced speed caused by the parallel connection of a large number of photoreceivers, and, accordingly, an increase in the capacitance included at the input of the comparators, which increases the rise and fall times of the voltage at the comparator input. In order to maintain high speed with an increase in the number of photodetectors, a corresponding decrease in the input resistance of the comparator is required. At the same time, the level of the signal removed from the photodetectors decreases, which, as the optoelectronic transducer to the code increases, becomes comparable with the noise level, which makes such a converter practically inoperative when operating at higher frequencies of information retrieval.

The purpose of the invention is to increase the speed and noise immunity by increasing the ratio of useful signal to noise.

The goal is achieved by the fact that the optoelectronic transducer translates into a code according to the author. N.925195 introduced an additional trigger, a key element, an emitter and a photodetector connected in the opposite polarity of the main photodetectors to the information inputs of the V-code conversion unit, the installation output of which is connected to the information input of the additional trigger, the output of the additional trigger is connected to the input of the additional key element, connected in parallel to an additional radiator, optically connected to an additional photodetector, synchronizing the output of the conversion unit V-code is connected to the synchronization input of an additional trigger.

The drawing shows a functional diagram of an optoelectronic displacement transducer to a code.

Claims (2)

The displacement transducer to the code contains a binary code scale 1 with V located radiators 2 and photodetectors 3, a V-code conversion unit 4, including a block of 5 key elements, whose codes are connected to the shift register 6, and the output is minus the power source 7, shaper 8, generator 9, 10 comparato, trigger 11, key elements 12 and 13, leading lines 14 and lagging 15 sub sections. In addition, the converter contains an additional photodetector 16, a key element 17, a trigger 18 and an additional radiator 19. In the initial state, the key element 17 is open, and the radiator 19 does not shine. The motion to code converter operates as follows. When the supply voltage is turned on, the shaper 8 generates a pulse. The setting O is applied to the R inputs of the shift register 6 and trigger 11, which is reset and QTKpMBaeT key element 12 through which the power source 7 connects to the t4 forward V line emitters 2. At the same time, the 8th first bit of the shift register 6 is recorded 1 and one of the key elements of the block 5 opens, connecting the minus of the power source 7 to the first-order emitter, which is turned on. Depending on the position of the binary code scale 1, the first-bit cell receiver will be illuminated or dimmed, and at the input of the comparator 10 in the event of illumination by: Wits voltage, which will trigger it and the appearance of 1 at the output and at the trigger inputs 11, as well as the set R-input of the trigger 18. At the same time, at the falling edge of the read clock pulse arriving: From the generator 8 to the information input Tf irrepa18, it is set to the position, n |) and which its output is connected to the input of the key element 17, closes it and through isl ents 2 begins to flow current, which causes it to glow, and the output of optically an associated photodetector 16 is EMC voltage opposite in EMAA voltage taken from the photodetector: 1st discharge. The input voltage of the comparator 10 begins to quickly drop to cool. When the level of comparing is reached, the comparator returns to the initial state, and an O. is set at its output; ,, ; Formula of the Invention. Optoelectronic OREOBRAZOVATEL DISPLACEMENT 8 code, s, N 925 195, characterized in that in order to improve performance and noise immunity by increasing otnoiveni useful smgnal-noise 8 has introduced additional trigger key element, the emitter and photodetector podkl1Ochenny in opposite sex rnosSh basic Photo detectors for information "1 Simultaneously, the appearance of O at the installation R input of trigger 18 returns it to its original state, and key element 17 opens, stopping the luminescence of the emitter 19, which, in turn, It leads to the disappearance of the offset voltage on the electrodes of photodetector 16. When a first clock input pulse. 1grigger 1 1 will turn on the key element 13, which connects plus the power source 7 to the treater and 2 lagging areas. Each oscillating clock of the generator 9 shifts in the shift register. 6 in the next bit, depending on the value of the signal. At the input of the comparator 10, the trigger 11 is switched, which switches the key elements 12, 13 in the above way. In this case, from the output of the comparator 10 binary serial code goes to the consumer. Through the number of ticks providing polling of all bits, the shaping / body generates a new impulse Setting O, and the duty cycle repeats, Thus, the introduction of the scheme ––; Voltage on an additional optically coupled emitter and photo receiver in an optoelectronic transducer in-code allows you to increase its speed without reducing the input comparator and the comparator and, therefore, maintain a high level of voltage taken from the photodetectors, which increases its optimum resistance. by increasing the ratio the useful signal is noise-. , . ,:; ;. :;,; Economical from the use of the proposed converter is determined by its mechanical advantages. (56) ABTOpckoe in the USSR Ms 925195, cd. 6 08 C 9/06, 1980. -. On the inputs of the conversion unit V code, the installation input of which is connected to the informational input of the additional trigger, the output of the additional trigger is connected to the input of the additional key element connected in parallel to the additional emitter, pnfjweckrf connected to the additional photo-receiver, the synchronizing output of the V-code conversion unit is connected to the synchronizer that is connected to the additional photo-receiver. . f f5 / J f // h It W / L