SU1624692A1 - Optoelectronic voltage-to-number converter - Google Patents

Abstract

The invention relates to computing and can be used in information-measuring systems. The aim of the invention is to increase speed and expand functionality. The electronic voltage converter in the code contains a pulse generator, a discrete deflector, a unit for converting the beam coordinates into a code made in the form of a coding mask with photodetectors, a digital-to-analog converter and a comparator. 1 hp ff, 2 ill.

Description

The invention relates to computing and can be used in information-measuring systems.

The purpose of the invention is to increase speed and enhance functionality.

FIG. 1 shows a block diagram of the device; in fig. 2 - discrete deflector circuit is functional ..

The optoelectronic voltage converter in the code (Fig. 1) contains a pulse generator 1, a discrete deflector 2, a block 3 converting the beam coordinates into a code made in the form of a coding mask with photo detectors, a digital-analog converter 4, a comparator 5. The output of the pulse generator 1 is connected with the input of the discrete deflector 2, the auxiliary input of which is connected to the output of the comparator 5. The first input of the comparator 5 is the input b of the device and the second input of the comparator 5 is connected to the output of the digital-to-analog converter 4 The group of inputs of which is connected to the group of electrical outputs of the unit 3 converting the beam coordinates into a code and forms the group of electrical outputs 7 of the devices. The group of optical outputs of the discrete deflector 2 is a group of optical outputs of the device 8 and is connected to the group of optical inputs of a unit 3 that converts the beam coordinates into a code.

The discrete deflector 2 contains (FIG.

2) 2 N bits 9.1,9.29.2p reversible

optoelectronic shift register, trigger 10, the first and second elements AND-NOT 11 and 12, the inverter 13, the trigger LED 14 and the first, second and third limiting resistors 15,16 and 17. Reversible Optoelectronic shift register in each bit contains indication

LEDs 18.1,18.218.1, ... 18.2p, first

the LEDs 19.1, 19.2 19119.2p, phototeristors 20.1, 20.220.2p, the second LEDs 21.1. 21,221.2p and third

LEDs 22.1, 22.222.2p in each i-th

-G

Yo

about

hO

ON Oh

Yu

the discharge of the reversible optoelectronic shift register (where I 1.22p) the cathode of the indication LED 181 is connected to the anode of the first LED 191, the cathode of which is connected to the anode of the photothyristor 201 and the cathodes of the second and third LEDs 211 and 22. The input 23 of the discrete deflector 2 is connected to the counting input of the trigger 10, the auxiliary input 24-to the input of the inverter 13 and the anodes of the third LEDs 22 in all discharge reversible optoelectronic shift register, and the input 25 of the installation in the initial state - to the second inputs of the first and second ele ENTOV AND-NO element 11 and 12, the entry in the initial setting of the trigger sosto- cathode 1 and the triggering of the LED 14. The output of inverter 13 is connected to anodes of second LEDs 211 in each discharge optoelectronic reversible shift register. The anode of the triggering LED 14 through the first limiting resistor 15 is connected to the power bus 26 and the anodes of the indicator LEDs 181 in all bits of the reversible optoelectronic shift register. The single output of the trigger 10 is connected to the first input of the first element AND-NO 11, the zero output to the first input of the second element AND-NO 12, while the output of the first element AND-NOT 11 through the second limiting resistor 16 is connected to the cathodes photothyristors 20 in all the odd bits of the reversible optoelectronic shift register, and the output of the second element, AND-NOT 12 through the third limiting resistor 17, to the cathodes of the photothyristors 20 in all the even bits of the reversible optoelectronic register. The triggering LED 14 is optically coupled to a first-discharge photo-thyristor of a reversible optoelectronic shift register, in which the optical outputs of the first LEDs 19i in all bits are a group of optical outputs 8 of the discrete deflector 2, each third LED 22i of the previous discharge is optically connected It is connected with the photothyristor 20 (I + 1) of the incoming cascade, and each photothyristor 20i of the previous discharge - with the second LED 21 (i + 1) of the next discharge.

The voltage converter in the code works as follows

When clock pulses are supplied from the output of the pulse generator 1 to the input 23 of the discrete deflector 2, the light point shifts to discrete distances (length quanta). Depending on the location of the light point, the light beam from one of the outputs 8 of the discrete deflector 2 is fed on

one of the optical inputs of the unit 3 converts the coordinates of the beam into a code. The beam coordinate conversion unit 3 generates a digital code on a group of electrical outputs corresponding to the coordinate of a light point on a discrete deflector 2, which is fed to a group of electrical outputs 7 of the device and to a group of inputs of digital-to-analog converter 4. Digital-to-analog converter 4 converts the code received to its inputs, to the analog signal, which is fed from its output to the second input of the comparator 5. If the magnitude of the voltage 1) e present on the second input of the comparator 5 is less than the input voltage UBX, (Us UBX) arriving at this moment of time at the device input 6, the voltage level corresponding to 1 is formed at the output of the comparator 5, which is fed to the auxiliary input 24 of the discrete deflector 2.

1 at the auxiliary input of the discrete deflector 2 provides in the discrete deflector 2 a shift of the light point to the right when the clock pulses come from the pulse generator 1. Moreover, the shift of the light point to the right in the discrete deflector 2 will be carried out until those nopv while the polarity of the voltages on the first and second inputs of the comparator 5 does not change to the opposite, i.e. 1) e UBX. It should be noted that, until this ratio is established at the inputs of the comparator 5, the code value on the group of electrical outputs 7 of the device is continuously increasing.

As soon as the Wee UBX ratio is established at the first and second inputs of the comparator 5, a voltage level corresponding to the value O is formed at its output. In this case, the auxiliary input of the discrete deflector 2 receives the level O, which ensures that when the clock pulses come from the generator 1 pulses shift the light from the point to the left until the ratio U3 UBX comes to the inputs of the comparator 5. That is, when the light point in the discrete deflector 2 is shifted to the left, the code value on the group of electrical outputs 7 of the device will decrease until the onset of the ratio U3 UBx.

Thus, this voltage to code converter operates as a tracking type converter and represents the converted signal both in the form of a code (a group of electrical outputs 7 of the device) and in the form of a coordinate

points (group of optical outputs 8 devices),

Consider the operation of the discrete deflector 2, shown in FIG. 2.

At the initial time, the supply bus 26 is supplied with a positive voltage, and the setup input 25 is supplied with a low voltage level, which enters the installation input of the trigger 10, the cathode of the triggering LED 14 and the second inputs of the first and second elements AND-NOT 11 and 12.

In this case, the trigger 10 is set to one state, i.e. at its single output there is 1, which is fed to the first input of the first element AND-NOT 11, and at zero output, which is fed to the first input of the second element M-NOT 12. However, due to the fact that at the second inputs of the first and second elements, And -NOT 11 and 12 are present at this moment of time the low voltage level O from the input 25 of the installation to the initial state of the device, at the outputs of the first and second elements AND-NOT 11 and 12 at this time there will be simultaneously high levels of voltage 1. In addition In addition, under the action of a low level The starting LED 14 turns on from the input 25 of the setup to the initial state of the device, the optical signal from which the photothyristor 20.1 of the first bit 9.1 of the reverse opto-electrone shift register converts to the forward bias. After removing the low voltage O from the input 25 of the installation into the initial state of the device at the output of the first element AND-NOT 11 forms a low voltage level corresponding to the value O, which is fed through the second limiting resistor 16 to the cathodes of the photothyristors 20i of all odd numbers bits of the reverse opto-electronic shift register. In this case, the photothyristor 20.1 of the first bit 9.1 goes into the conducting state, the first LED 19.1 emits light to the first output of the group of optical outputs 8 of the device, and the indicator LED 18.1 of the first bit 9.1 of the reverse optical shift register visually informs that the first bit 9.1 of the discrete deflector 2 is in an excited state,

For definiteness, let us assume that for the time period considered at the present moment, at the additional input 24 of the discrete deflector 2 there is 1, which is fed to the third LED diodes 22 of all bits 91 of the reverse optoelectronic shift register. Moreover, only the third LED 22.1 of the first bit 9.1 emits light to the photo thyristor 20.2 of the second bit 9.2, since only the photo thyristor

20.1 of the first bit 9.1 is in the conducting state.

After setting the trigger 10 to one state and the arrival of the first pulse from the pulse generator 1 to the input 23

0 discrete deflector 2 and the counting input of the trigger 10, it switches to the opposite (zero) state, i.e. a voltage level corresponding to O is formed at its single output, and at its output

5 zero output - voltage level corresponding to 1. At the output of the second element AND-NOT 12, a voltage level appears corresponding to O, which is fed through the third limiting resistor 17 to the cathodes of the photo thyristors 20i of all even bits 9i reversible opto - electron shift register.

Due to the presence of the optical signal on the photothyristor 20.2 of the second bit

5 9.2 from the third light-emitting diode 22.1 of the first discharge 9.1 the photo-thyristor 20.2 goes into the conducting state, as a result of which the second discharge 9.2 of the reversible optoelectronic shift register is excited and its first discharge is reset to 9.1. The first discharge is zeroed due to the arrival of the first 10.1 first discharge photodiode 20.1 at the cathode of a high voltage level from the first AND-HE element 11, which is turned off by a low voltage level at the first input from the single output of the trigger 10. With the arrival of the second pulse to the counting input of the trigger 10 from switches again to

0 unit state, which will lead to the initiation of the third bit 9.3 of the reverse optoelectronic shift register and zeroing of its second bit 9.2.

After the arrival of five pulses at the input

5 23 discrete deflector 2 in the excited state will be only the sixth bit 9.6 of the reverse optoelectronic shift register, and hence the discrete deflector 2.

0 At this time, let the auxiliary input 24 of the discrete deflector 2 be supplied O), which is fed to the input of the inverter 13. In this case, the high voltage level from the output of the inverter 13 goes to

5 anodes of the second LEDs 211 of all bits 91 of the reverse optoelectronic shift register and ensure the inclusion of the second LED 21.6 of its sixth bit 9.6. Further, the included second LED 21.6 of the sixth bit 9.6 gives light

The photothyristor is 20.5 p of that bit 9.5, while the third LED 22.6 of the sixth bit 9.6 turns off due to the occurrence of its anode O from the auxiliary input 24 of the discrete deflector 2. When the sixth pulse arrives at the counting input of the trigger 10, it switches. excitation of the fifth bit 9.5 of the reversible optoelectronic shift register due to the optical signal present on its photo thyristor 20.4 from the second LED 21.6 and due to the arrival of the second element AND-HE 12 at its cathode O from the output of the second element.

Upon the arrival of the seventh pulse at the input 23 of the discrete deflector 2, the fourth bit 9.4 of the discrete deflector 2 is excited and the fifth bit 9.5 is zeroed. When the pulses enter the input 23 of the discrete deflector 2 and the voltage levels change at the additional input 24 of the discrete deflector 2, it functions as described above.

Claims (1)

1. An optoelectronic voltage converter into a code containing a generator, the output of which is connected to the input of a discrete deflector, characterized in that, in order to increase speed and enhance functionality, a beam coordinate conversion unit is inserted into the code executed as an encoding mask with photodetectors, a digital-to-analogue converter and a comparator, the first input of which is connected to the input of the entire device, the second input is connected to the output of the digital-analogue converter, and the output to an additional the input of the discrete deflector, the group of optical outputs of which is the group of optical outputs of the entire device and is optically connected with the group of optical inputs of the unit for converting beam coordinates to code, the group of electrical outputs of which is connected to the group of inputs of the digital-analog converter and is the group of electrical outputs of the entire device. 2, the Converter according to claim 1, that is, with the fact that the discrete deflector contains a counting trigger, two elements IS-NOT, an inverter that triggers the LED, three the limit register and the reversible optoelectronic shift register for 2N bits, in each discharge of which the cathode of the indication LED is connected to the anode of the first LED, the cathode of which is connected to the anode of the photothyristor and the cathodes of the second and third LEDs, while the anodes of the indication LEDs in all of the reverse the optoelectronic shift register is connected to the power bus and through the first limiting resistor to the anode of the triggering LED, the anodes of the second LEDs are connected to the output and nvertor, the anodes of the third LEDs - with the input of the LEDs, while the anodes of the indicator LEDs of all bits of the reverse optoelectronic shift register are connected to the power bus and through the first the limiting resistor - with the anode of the triggering LED, the anodes of the second LEDs are combined and connected to the inverter output, the anodes of the third LEDs are combined and connected to the input of the inverter and the auxiliary input of the discrete deflector, the cathodes of the photothyristors of all the odd bits through the second limiting resistor are connected to the output of the first AND – NES element, and the cathodes photothyristors of all even bits through the third limiting resistor - with the output of the second NAND element, the first input of which is connected to the zero output of the counting trigger, whose single output connected to the first input of the first NAND element, and the counting input of the counting trigger is connected to the input of the discrete deflector, the installation input in the initial state of which is connected to the input setting the counting trigger to the initial state, with the second inputs of the AND-NOT elements and the cathode of the triggering LED, optically coupled to the first discharge photo thyristor of the reverse optoelectronic shift register, in which the optical outputs of the first LEDs in all bits are a group of optical outputs of the discrete deflector the third led of the previous bit optically associated with the photothyristor of the subsequent discharge, and each photothyristor of the previous discharge with the second LED of the subsequent discharge. u FIG. one