SU458008A1 - Converter angular position of the shaft in the code - Google Patents

Description

one

The invention relates to automation and computing and can be used, in particular, in two-digit tracking systems.

A known converter of the angular position of the shaft into a code containing coarse and accurate coded code sensors interconnected by a gearbox, reading, and elements located in one precision sensor in one row along the read line, and in a coarse sensor in two rows a shift relative to the read line to the side of the leading and lagging codes, and a read row selector unit connected to the scanners of the coarse readout sensor elements, and a code converter — a code connected to the output of the selector block p Yes, readouts and outputs of reading elements of bits.

The purpose of the invention is to simplify the converter circuit.

This is achieved by introducing the "OR" circuit into the converter, and the reading row selection block contains the circuit "NOT, a delay line connected to the polling window of the precision counting sensor, two circuits" AND, one of whose inputs are connected to the output of the delay line, the output of the first And circuits are connected to the interrogation bus of one row of coarse-counting sensor readout elements, and the output of the second circuit is And with the interrogation rate of another row of coarse-counting sensor readings, and the second input of the first AND circuit is connected to the high-resolution output of the sensor

the exact readout directly, the second input of the second circuit “AND - through the circuit“ is NOT, and the outputs of the reading elements of each bit of the coarse sensor are pairwise connected and connected to the inputs of the circuit “OR.

The drawing shows the structural scheme of the proposed converter.

It consists of a coarse coded sensor 1, a coarse encoder 2, a reducer 3, OR 4 schemes, an input shaft 5,

coarse-count output channels 6, precise-count output channels 7, precision-count code sensor interrogation bus 8 and read-out counting unit 9 performed in the circuit "NOT 10, delay lines 11 and

schemes "And 12 and 13, as well as tires 14 poll

left p and yes 15 survey right p yes

reading sensor code elements

rough countdown.

The Converter operates as follows.

When a polling pulse arrives on the bus 8, the precision encoder code 2 generates a n-bit code corresponding to the angle of rotation of its shaft, which goes to the outfits 7 and is younger.

the bits of the rotation angle of the input shaft 5. If the high-order digit of the exact code reads the digit "1, the first input of the AND 12 circuit is prepared, the second input of which via a delay line 11 from the bus 8 receives a polling pulse (delay line 11 is determined by the time generating a code by code sensor 2 when a polling pulse arrives on it). The circuit “And 12 forms a pulse, which is fed to the bus 14 of the survey of the left row of reading: their elements of the coder 1 encoder. Code sensor 1 forms a parallel n-bit code corresponding to the angle of rotation of its shaft and representing the highest bits of the code of the angle of rotation of the input shaft 5, which from the left row of reading elements through the OR 4 scheme enters the output tires 6.

If the high-order code contains an exact reference “About the circuit“ NOT 10 prepares the first input of the circuit “And 13 and the polling pulse from bus 8 through delay line 11 and the circuit“ And 13 enters the bus 15 of polling of the right row of reading elements of the code sensor 1 rough countdown. Code sensor 1 generates a parallel p-bit code corresponding to the angle of rotation of its shaft and representing the higher bits of the code of the angle of rotation of the input shaft 5, which from the right row of reading elements through the OR 4 scheme enters the output tires 6.

Thus, the selection control of the desired number of read elements in the coarse code sensor 1 is controlled by the block 9 of the selection of the read series by the value of the high bit of the exact count code. When the input shaft 5 rotates in the direction of increasing the code at the moment of completing a full revolution with the accurate counting code sensor 2, the coarse reference code is read from the left row of reading elements of the encoder 1. After the complete encoder 2 completes its full rotation in the high order code the figure is "O" and the reading of the coarse reference code begins with the right row of reading elements of the coarse code sensor 1.

When the input shaft 5 rotates in the direction of decreasing the coarse reference code at the moment

the completion of a full revolution by the code sensor 2 of the exact counting, the reading of the coarse counting code is carried out from the right row of reading elements of the code sensor I. After the completion of the full rotation by the code sensor 2, as indicated by the appearance of the digit "I in its highest order, the reading of the coarse counting code starts from the left row of the read code elements

coarse count sensor 1

With this organization of code reading from the coarse code sensor, the ambiguity of reading the coarse code is eliminated at the time of the completion of a complete revolution by the code sensor of the exact readout caused by the mismatch of the coils of the coarse and exact code sensors.

Subject invention

Shaft angular position transducer into a code containing coarse and fine coded code sensors interconnected by a gearbox, reading elements located in the one-off sensor in one row along the read line, and in the coarse sensor in two rows with a shift relative to the line readout the leading and lagging codes, and the reading row selection unit connected to the polling buses of the reading elements of the coarse sensor, characterized in that, in order to simplify the converter circuit, you enter The “OR” circuits, and the read row selection block contains the “NOT” circuit, a delay line connected to the polling bus of the precision sensor, two AND circuits, one of whose inputs is connected to the output of the delay line, the output of the first AND circuit to the polling bus.

one row of readout sensor elements of a coarse readout, and the output of the second “I” circuit with a polling bus of another row of readout sensor elements of a coarse readout, the second input of the first “And” circuit connected to

to the output of the higher bit of the sensor of the exact counting directly, the second input of the second circuit “I - through the circuit“ NOT, and the outputs of the reading elements of each bit of the coarse count sensor are pairwise combined and

connected to the inputs of the circuits "OR.