SU1471166A1 - Device for switching-off light flux - Google Patents

Abstract

The invention relates to optical devices and can be used in optical systems for controlling the spatial position of the beam. The aim of the invention is to expand the range of deviation of the luminous flux. The device contains a source of light 1, mounted on the shaft of a stepper motor 2 mirror 3 and a sensor 26 of the angular position of the shaft, a control unit 4 connected by outputs to the control inputs of the motor 2. The control unit 4 contains first and second 10 and 11 memory blocks, the first and the second converters 12 and 13 of the code, the first and second circuits AND-NOT 14 and 15, the first, second, third and fourth circuits are NOT 16,17,18 and 19, the first, second, third and fourth multiplexers 20,21,22 and 23 , the distributor 24 pulses and the comparator 25. The extension of the range of the deviation of the light This flow is carried out using the pulses 24 entered into the control unit 4 of the distributor, the comparator 25, four multiplexers 20,21,22,23 and the fourth circuit NOT 19 and the shaft 26 of the motor 26 is mounted on the shaft of the electric motor 2. The coarse installation of the mirror 3 in the desired range is performed using the sensor 26 of the angular position of the shaft, the distributor 24 pulses, the comparator 25 and the multiplexers 20,21,22,23. After the completion of the coarse installation of the mirror 3 according to the signal of the comparator 25, the multiplexers 20,21,22,23 shut off the distributor 24 pulses from the control inputs of the electric motor 2 and connect the outputs of the converters 12,13 to them. 1 il.

Description

first stream. The device contains a source of light 1 mounted on the shaft of a stepper motor 2, a mirror 3, and a sensor 26 of the angular position of the shaft, a control unit A connected to the outputs of the control inputs of the electric motor 2. The control unit 4 contains the first and second 10 and 11 memory blocks, the first and the second converters 12 n 13 of the code, the first and second circuits AND-NOT 14 and 15, the first, second, third and fourth circuits are NOT 16, 17, 18 and 19, the first, second, third and fourth multiplexers 20, 21, 22 and 23, the distributor 24 pulses and the comparator 25, the extension of the range of deviation luminous flux is carried out using the injected c.

the control unit 4 of the distributor 24, the pulses, the comparator 25, the four multi-axial switches 20, 21, 22, 23 and the fourth scheme NOT 19 and the installation on the shaft of the electric motor 2. The sensor 26 of the angular position of the shaft. The coarse installation of the mirror 3 in the desired range is performed using the sensor 26 of the coal position of the shaft, the distributor 24 pulses, the comparator 25 and multiplexers 20, 21, 22, 23. After completing the rough installation of the mirror 3 according to the signal of the comparator 25, multiplexers 20, 21, 22, 23 disconnect the distributor 24 pulses from the control inputs of the electric motor 2 and connect the outputs of the converters 12, 13 of the code, 1 sludge to them.

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The invention relates to optical devices and can be used in optical systems for controlling the spatial position of the beam.

The aim of the invention is to expand the range of deviation of the light flux.

The drawing shows a functional diagram of an apparatus for deflecting a light flux.

The device for deflecting the light flux contains a source of light 1 mounted on the shaft of the stepping motor 2 mirror 3, a motor control unit 4 connected to the inputs 5 to the tires 5 to the outputs to the control inputs 6 to 9 of the motor 2, through which the motor 2 is connected to a power source (not shown). The control unit 2 of the motor 2 contains the first 10 and second 11 memory blocks, the first 2 and second 13 code converters, the first 14 and second 15 I-NOT elements, the first 16, the second 17, the third 18 and the fourth 19 NOT circuit, the first 20, second 21, third 22 and fourth 23 multiplexers, pulse distributor 24 and comparator 25. An angular position sensor 26 is mounted on the shaft of electric motor 2.

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The first element AND-NOT 14 is connected by the first input to one of the inputs of the control unit 4 directly and through the first element NOT 16 to the first input of the second element AND-NOT 15 connected by the second input through the serially connected first code converter 12 and memory block 10 to other inputs of control unit 4, connected via serially connected second memory unit 11 and code converter 13 to the second input of the first AND-HAND 14, the output of which is connected directly to the fourth information input of the first multiplex corr 20, the first information input of the second multiplexer 21, the second information input of the third multiplexer 22, the third information input of the fourth multiplexer 23 and through the third scheme NOT with the second information input of the first 20, third information input of the second 21, fourth information input of the third 22, first information input fourth 23 multiplexers. The output of the second IS 15 circuit is connected directly to the third information input of the first 20, fourth information input of the second 21, first information input of the third 22, second information input of the fourth 23 multiplexers, and through the second circuit NOT 17 with the first information input of the first 20, second information input the second 21, the third information input of the third 22 and the fourth information input of the fourth 23 multiplexers. The outputs of each of the multiplexers 20 to 23 are connected to the outputs of the control unit 4, which are connected to the control inputs 6-9 of the electric motor 2. The fifth, sixth, seventh, and eighth information inputs of the first multiplexer 20 are connected to the first address inputs of each of the multiplexers 20 - 23 and connected to the first output of the distributor 24 pulses, the second output of which is connected to the second address inputs of each multiplexer 20–23, as well as the fifth, sixth, seventh and eighth information inputs of the second multiplexer 21. Fifth, sixth, sec the fifth and eighth information inputs of the third multiplexer 22 are connected to the third output of the distributor 24 pulses, the fourth output of which is connected to the fifth, sixth, seventh and eighth information inputs of the fourth multiplexer 23. The third address inputs of each of the multiplexers 20-23 are connected to the output of the fourth HE circuit 19, the input of which is connected to the output Equal to comparator 25, the outputs More and Equal to which are connected respectively to the first (Direction) and second (Stop) inputs of the distributor 24 pulses. The first inputs of the comparator 25 are connected to an angular position sensor 26 mounted on the shaft of the electric motor 2, the second inputs are connected to the inputs of the first 10 and second 11 memory blocks,

The device works as follows.

An input signal is received from the input busbars 5 to the input of the first 10 and second-11 memory blocks, which contains the magnitude of the required deviation of the luminous flux in the form of a parallel multi-digit digital binary code. At the same time, this signal is fed to the first inputs of the comparator 25, to the second inputs of which a signal is received in the form of a binary code from the sensor 26 of the angular position of the motor shaft .2. In the comparator 25, these signals are compared. The sensor 26 of the angular position of the shaft provides information about the angular position of the shaft, and hence the mirror 3 attached to it. The number of bits of the code coming from the sensor 26 of the angular position of the shaft to the second inputs of the comparator 25 is determined by the expression

/. 360 2 about

where n is the number of code bits; oL - the value of the main step of the motor.

If the signals arriving at the first and second inputs of the comparator 25 are not equal, at the output Equal to the last there is a logical O, which is fed to the input of the Stop of the distributor 24 pulses and allows its operation. The latter generates the signals necessary for the rotation of the stepper motor 2. The direction of rotation is determined by the state of the output of More Comparator 25. When there is 1 on it, rotation occurs in one direction, and in the presence of O - in the other. The output state More is determined by which of the two binary signals is larger, from the input bus 5 or from the sensor 26 of the angular position of the shaft. The logical signal O from the output Equals comparator 25 through the fourth circuit NOT 19 establishes the third address inputs of multiplexers 20-23 logical 1.

Thus, depending on the levels at the first and second address inputs of the multiplexers 20-23, the fifth, sixth, seventh or eighth information inputs are connected to their outputs. The signals from the outputs of the 24 impulses arrive at the fifth, sixth, seventh and eighth information inputs of each of the multiplexers 20–23 parallel and then go to the control inputs 6–9 of the pag electric motor 2, ensuring its rotation.

The motor shaft 2 rotates until the signals arriving at the first inputs of the comparator 25 from the input rails 5 and the second inputs from the sensor 26 of the angular position of the shaft are equal. In this case, the output Equals Comparator 25 appears

logical 1, which stops the operation of the pulse distributor 24 and sets the logical O to the third address inputs of multiplexers 20–23. This means that the rough installation of mirror 3 is completed. At the same time, depending on the state of the first and second address inputs, the first, second, third, or fourth information inputs are connected to the outputs of the multiplexers 20-23. The information inputs of multiplexers 20-23 receive signals from the first converter 12 of the code through the second AND 15 circuit and the third KE 17 scheme in the forward motion mode or from the second converter 13 of the code through the first AND 14 scheme and the second HE 18 circuit. in the reverse movement mode The transition from the forward movement to the reverse movement is performed by inputting the first circuit NOT 16 Logic O to the input (in the forward movement mode, logical 1 must be present at its input).

The exact installation of the mirror 3 is carried out as follows. GO and II memory blocks convert the incoming signal to other signals, predetermined binary signals, which are then fed to code converters 12 and 13 (for example, a code converter is a pulse width that converts the code applied to it into a sequence of pulses whose duration is proportional to the code) . Next, the pulses through the first 14 or second 15 EIDs do NOT arrive at the information inputs of multiplexers 20–23 either directly or through the third 17 and the second 18 elements NOT. Depending on the Reverse command, the AND-HE elements 14 and 15 work alternately. If the Reverse signal is 1, the AND-NOT element transmits pulses, and the AND-15 element is not. On his way out

it will always be 1. If the signal is Re- 50 elements are NOT 16 - 18. The switch is equal to O, vice versa.

Thus, the pulse sequence arrives at the first four information inputs of multiplexers 20–23. Depending on 55 over which engine the engine operates, either the first, or second, or third, or exact and exact modes are connected to the outputs of multiplexers 20-23. coarse installation is carried out by multiplexers 20-23 using the sensor 26 of the angular position of the shaft, the comparator 2 and the element 19.

Lormula invention

A device for diverting a light flux containing a source of light

Vertical information inputs. From the outputs of multiplexers 20–23, the signals are fed to control inputs 6–9

From the electric motor 2, This is necessary to obtain a smooth, without breaks, characteristics of the deviation of the luminous flux from the specified code when the luminous flux passes from one step of the engine 2 to the other. At any time, one of the windings of the engine 2 will be fully connected (it is fed .1 from the disconnected element AND NOT 14, 15) to the other winding

5 will be de-energized (O is fed to it from the output of the element HE 17, 18, the input of which is connected to the output of the unused element AND-HE 14, 15). The two remaining windings will be connected alternately, as one of them receives a sequence of pulses, and the other - their inversion from the output of the element HE 17, 18.

Pulse duration determines

5 position of the light flux in space. The duration itself is defined by the code recorded in memory blocks 10, 11. In one of the blocks 10, 11 of the memory, the characteristic of the step motor 2 is recorded when the luminous flux deviates in one direction and in the other in the other. Memory blocks 10, 11 are necessary for obtaining a linear characteristic code — angle of a stepping motor 2. Each combination of signals at the input of blocks 10, 11 of a memory selects such a combination at the output so that the currents through the corresponding windings of motor 2 would cause the required deviation of its rotor . The pulse repetition rate is chosen sufficiently high so that the rotor reacts only to the average values of the currents in the windings.

5 Thus, for coarse installation of the mirror 3, the distributor 24 pulses are used, and for the exact one - blocks 10 and 11 of memory, converters 12 and 13 soda, AND-HE elements 14

  elements are NOT 16 - 18. The switch

Accurate and coarse installation modes are performed by multiplexers 20–23 using a shaft angle encoder 26, a comparator 25 and a HE element 19.

Lormula invention

A device for diverting a light flux containing a light source 20

one mirror mounted on the shaft of a stepper motor; an electric motor control unit connected by outputs to the control inputs of the electric motor and including the first and second memory blocks, the first and second code converters, the first, second and third elements, NOT, the first and second NAND elements, the first input Q of the motor control unit is connected to the first input of the first NAND element and through the first element NOT to the first input of the second NAND element, and the second input of the electric motor control unit is connected Without successively connected the first memory block and the first code converter to the second input of the second NAND element and through the serially connected second memory block and the second code converter to the second input of the first NAND element, .. This is so that, in order to expand the range of deflection of the light flux 25, the device is additionally equipped with an angular position sensor of the shaft mounted on the motor shaft, and an electric motor 1 is additionally inserted into the control unit

comparator, pulse distributor, fourth NOT circuit, as well as first, second, third and fourth multiplexers whose outputs are outputs of the control unit, while the output of the second AND-NOT circuit is connected to the third information input of the first, fourth information input of the second, first information the input of the third and the second information input of the fourth multiplexer, and through the second elements NOT with the first information input of the first, the second information input of the second, the third information input D5 and his fourth invariant

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the fourth multiplex information input, the fourth information input, the first input, the first information input of the first, the first information input of the second, the second information input of the third, and the third information input of the fourth multiplexer are connected to the output of the first AND-N circuit, to which the second information input of the first, the third information input of the second, the fourth information input of the third and the first information input of the fourth multiplexer are connected, fifth, sixth, seventh, in moy data inputs of the first multiplexer are connected to first address inputs and each; multiplexers and connected to the first output of the pulse distributor, to the second output of which the second address inputs of each multiplexer are connected, as well as the fifth, sixth, seventh and eighth information inputs of the second multiplexer, the fifth, sixth, seventh and eighth information inputs of the third multiplexer are connected with the third output of the pulse distributor, with the fourth output of which the fifth, sixth, seventh and eighth information inputs of the fourth multiplexer are connected, the third address inputs of each of the multi Ipexors are connected to the output of the following: a NOT circuit, whose input is connected to the Equals Comparator output, the Outputs More and Equal to which are connected respectively to the first and second inputs of the pulse distributor, the first inputs of the comparator being connected to the angular position sensor of the shaft, and the second to C the inputs of the first and second memory blocks.

Claims (1)

Claim Device for deflecting light flux containing a light source 7 1471–66, a mirror mounted on the shaft of a stepper motor, an electric motor control unit connected by outputs to the control inputs of the electric motor, and including the first and second memory blocks, the first and second code converters, the first, second, and third elements NOT, the first and second elements AND -NOTE, and the first input jg of the motor control unit is connected to the first input of the first NAND element and through the first element NOT to the first input of the second NAND element, and the second input of the motor control unit is connected through the first block connected in series I memory and the first code converter to the second input of the second AND-NOT element and through the second block of memory and the second code converter connected in series 2θ to the second input of the first AND-NOT element, which means that, in order to expand the range deviations of the luminous flux 25, the device is additionally equipped with a shaft angular position sensor mounted on the motor shaft, and the comparator, pulse distributor, the fourth NOT circuit, and the first, second circuit are additionally introduced into the electric motor control unit , the third and fourth multiplexers, the outputs of which are the outputs of the control unit, while the output of the second circuit is NOT connected to the third information input of the first, fourth information input of the second, the first information input of the third and second inddia input of the fourth multiplexers, and through the second NOT elements - with a first input of the first information, second information input of the second, third 45 nym an information input of the third and fourth ^invariant: formational input of the fourth multiplexer, a fourth nformatsionny. the input of the first, the first information input of the first, the first information input of the second, the second information input of the third and the third information input of the fourth multiplexers are connected to the output of the first AND-NOT circuit, to which the second information input of the first, the third information input of the second, fourth are NOT connected through the third circuit the information input of the third and the first information input of the fourth multiplexers, the fifth, sixth, seventh, eighth information inputs of the first multiplexer are connected to the first address inputs the odes of each of the multiplexers and are connected to the first output of the pulse distributor, the second output of which is connected to the second address inputs of each multiplexer, as well as the fifth, sixth, seventh and eighth information inputs of the second multiplexer, the fifth, sixth, seventh and eighth information inputs of the third multiplexer are connected to the third output of the pulse distributor, with the fourth output of which the fifth, sixth, seventh and eighth information inputs of the fourth multiplexer are connected, the third address inputs are each о of the multiplexers are connected to the output of the fourth NOT circuit, the input of which is connected to the output of Equal to the comparator, the outputs of More and Equal to which are connected respectively to the first and second inputs of the pulse distributor, while the first inputs of the comparator are connected by a shaft angle sensor, and the second are connected to the inputs of the first and second memory blocks.