SU1488962A2 - Shaft-angle encoder - Google Patents

Description

The invention relates to automation and computing and can be used to connect analog sources of information with a digital computing device. In order to increase reliability by monitoring the operation of part of its blocks into a shaft angle converter into a code containing a generator

, 1 pulses, power supply unit 2, phase shifter 3, zero-organs 4-6, shapers 7-9 pulses, counters

2

10 and 11, trigger 12, register 13, multiplexer 14, entered counter 15, block 16 elements EXCLUSIVE OR, element EXCLUSIVE OR I7, element OR 18, element AND 19, trigger 20 and a signaling device 21, code bus 22,

Unit 2 generates a two-phase supply voltage of the phase shifter 3. In register 13, a rotation angle code of the phase shifter 3 is formed with a conversion error equal to half the sum of the phase errors of the signals on the secondary windings of the phase shifter 3, the counter angle 15 produces the same angle code, but with a higher error. Senior output digits register codes 13 and counter 15 are compared with each other. With the help of a set of elements 16-20. The mismatch of the codes indicates a possible malfunction of the converter and is recorded in the signaling device 21. 1 and l

15

511 1488962 A 2

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The invention relates to automation and computing, can be used to connect analog sources of information with a digital computing device and is an improvement of the invention by Avtosv. No. 1365355.

The aim of the invention is to increase the reliability of the Converter by monitoring the operation of part of its blocks.

The drawing shows a structural diagram of the Converter.

The converter contains a generator-15 torus 1 pulses, power supply unit 2, phase shifter 3, zero-organs 4-6, drivers 7-9 pulses, counters 10 and 11, trigger 12, register 13, multiplexer 14, counter 15, block ^ 0 16 elements EXCLUSIVE OR, element EXCLUSIVE OR 17, element OR 18, element AND 19, additional trigger 20 and signaling device 21, code bus 22.

The Converter operates as follows.

From the outputs of block 2, the primary windings of the phase shifter 3 receive sinusoidal voltages of equal amplitude and with a relative phase shift ^ / 2. The phase shift of the voltages on the secondary windings of the phase shifter 3 relative to the voltages on the respective primary windings 35 is proportional to the angle of rotation of the phase shifter 3. At the outputs of the zero-organs 4-6, meanders are formed whose fronts coincide with the passage of the zero level by the corresponding input voltages ⁴ θ. The phase shift between the signals at the outputs of the zero-bodies 4 and 6 is proportional to the angle of rotation of the rotor of the phase shifter 3. The signal at the output of the zero-body 5 lags in phase from the signal at the output of the zero-body 4 by ^ / 2.

At the outputs of the formers 7-9 pulses on the negative front of the input signal short pulses are formed. 50

I

The clock input of the v-bit counter 11 from the generator I receives frequency pulses 1. The impulse of the driver 9, the counter 11 is reset to zero, thereby setting the origin. On the negative front of the signal at the output of the zero-body 4 at the output of the trigger 12, a potential is established that permits filling the (η-1) -bit counter 10. While from the zero-body 5, the unit input of the multiplexer 14 receives a single signal from the generator 1 to the clock input counter 10 comes the frequency pulses £. When the zero signal at the output of the zero organ is set to zero, the clock input of the counter 10 receives pulses of frequency 2 £. When the counter 10 overflows, the pulse of the driver 8 is generated by the negative edge of the high-order bit and the counter code 11 is entered into the register 13, the output 12 of the trigger 12 is set and the signal is set to zero. The code in the register 13 is proportional to the rotation angle of the rotor of the phase shifter 3, and the conversion error is equal to the half-sum of the phase errors of the signals on the secondary windings of the phase shifter 3.

I

The pulse shaper 9 in the counter 15 for the code bus 22 is entered code number 3/4. Since the pulses of the formers 7 and 8 are out of phase relative to each other by 3/41 ", then at the moment of formation of the pulse at the input of the former 7, the outputs of the counter 15 will be set to the same code as the outputs of the counter 11 at the moment of formation of the pulse at the output of the former 8 If the half-sum code of two samples, that is, more accurate, is written to register 13. These codes may differ by several lower-order units. If the codes in the high-order bits coincide, the signals with zero level are set at the outputs of all elements of block 16 Ntov 18 and 19 to the inputs of the element 17 receives a signal with a zero level, from element 17 to the information input of the trigger 20 receives a signal with a zero level, a pulse from the driver 7 to the trigger 20 is recorded a zero signal, and the detector 21 does not work. the most significant digits of one of the compared codes are all ones, and the other is zero, that is, these codes differ from zero by several ones, the output of all elements of block 16 are set to signals with a unit level, from elements 18 and 19 to the inputs of the element 5

That 17 signals are received with a single level, from element 17 to the information input of the trigger 20 a signal with a zero level is received, a zero signal is written to the trigger 20 by a pulse from the driver 7 and the alarm 21 does not activate.

If the codes in the higher digits do not match, the converter is faulty, a signal with a unit level arrives at the inputs of element 17, element 18, a signal with a zero level comes from element 19, and a signal with a single level, pulse from a driver, comes from element 17 to information input of the trigger 20 7, a single signaling signaling device 21 is activated in the trigger 20.

As a result, the converter performs automatic control of the health of a part of its elements, which ensures the positive effect of increasing its reliability.

Claims (1)

Claim The converter of an angle of rotation of a shaft in a code on an auth. St. № 1365355, about tl i 1488962 ⁶ . with the aim of increasing the reliability of the converter, a third counter, an additional trigger, an EXCLUSIVE OR block, an EXCLUSIVE OR element, an AND element, an OR element, a signaling device, and a code bus which is connected to the installation inputs of the third counter, the synchronization input and the information input of the third counter are connected respectively to the output of the third pulse shaper and the second output of the pulse generator 15, and the high-end outputs are connected to the first group of inputs of the elec cops EXCLUDING OR, the second group of inputs of which is connected to the outputs of senior bits 20 registers, and the outputs are connected to the inputs of the AND and OR elements, the outputs of the AND and OR elements are connected to the outputs of the EXCLUSIVE OR element, whose output is connected to the additional trigger information input, the additional trigger synchronization input is connected to the output of the first pulse shaper, and the output is connected to alarm input.