SU1246048A1 - Contactless channel switching device for two-channel system - Google Patents

Abstract

The invention relates to the field of instrumentation and automation and can be used in high-precision two-channel tracking systems and measuring complexes with sinus-cosine rotating transformers (SCWT) as sensors for switching the operation of precise and coarse control or measurement channels. It allows you to stabilize the angle (zone of angles) at which the channel is switched, and to ensure its independence from the characteristics used in the SCRT system, due to the fact that the output signal of the SCRT coarse channel through the upper distributor 1 and the amplifier 2 goes to the input of the first key 1 and the input of the first rectifier 3. The output of the latter is fed to the input of the converter 4 connected by the outputs with the control inputs of the keys 5 and 6, the outputs of which are combined and are the output of the device. Signals with the sine and cosine windings of a SCRT coarse channel are fed through a successively connected repeater 11 and a quadratic detector 12 and a serially connected repeater 13 and a quadratic detector 14 to the inputs of the adder 10. The output signal of the latter through the extraction unit 9 and the second terminal 8 goes to the control input of the attenuator 7, the information input of which receives the output signal of the reference voltage source 15. The output signal of the attenuator 7 is fed to the second input of the converter. I il. a (l fg

Description

The invention relates to the field of instrumentation and automation and can be widely used in two-dimensional tracking systems, in non-specialized devices, etc.

G (purpose of the invention is to simplify the device.

The drawing is a block diagram of the device.

The device contains a limiter 1 above, an amplifier 2, the first rectifier 3, the converter 4, the first and second keys 5 and 6, the attenuator 7, the second amplifier 8, the square-root extraction unit 9, the transmitter 10, the first repeater 11, the first detector 12, the second repeater 13, second detector 14, source 15 reference. voltages, limiting resistor 16, first and second resistors 17 and 18, and thermistor 19, first 20, second 21, third 22 and fourth 23 inputs and output 24 of the device, field. Howling transistor 25.

The attenuator 7 includes a field-effect transistor 25, a limiting resistor 16, first and second resistors 17, 18, and a thermistor 19.

The first and second detectors 12 and 14 have quadratic characteristics. The device works as follows.

The output voltage of the coarse channel of the two-channel tracking system comes from the input 20 of the device to the input of the limiter 1 from above, which is limited in magnitude from above. Output the voltage of limiter 1 is fed from above to the signal input of the first key 5 and to the input of the first rectifier 3. The last output amplifies the output voltage of the coarse channel of the two-channel system, and the value of its output voltage depends only on the value of its input voltage and does not depend from its phase. The voltage from the output of the first top of the mi-3 goes to the first input of the converter 4, the second input of which receives the reference voltage from the output of the source 15 of the reference voltage via an attenuator 7 controlled by the output voltage of the second rectifier 8,

The magnitude of the reference voltage at the output of the source voltage of the reference voltage 15 is a step. Depends on the required level of the switch. 1.ch channels. If the output

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the voltage of the coarse channel of the two-channel system is greater than a predetermined value, then the first switch 5 is opened and the output voltage of the amplifier 2 5 is fed to the output 24 of the device. In this case, the second switch 6 is closed and the output voltage of the exact channel of the two-channel system to the device output 24 does not pass.

When; || Reducing the output voltage of the coarse channel of the two-channel system below a predetermined value, the first key 5 closes and the second key 6 opens, passing the output voltage of the exact channel of the two-channel system to the device input 20 at the device output 24.

The channel switching mode of the two-channel system is stabilized by changing the value of the reference voltage coming from the output of the source 5 of the reference voltage through the attenuator 7 to the second input of the converter 4, the attenuator 7 controlling the output voltage of the second rectifier 8 proportional to the slope of the output voltage of the coarse channel dvzhkhkanalny system. In order to implement this mode, the voltage proportional to the sine of the angle of rotation of the coarse channel sensor is controlled from the input 22 of the device to the input of the first repeater 11, the output voltage of which is fed to the input of the first detector 12, the output of which is a voltage proportional to the square of the sine of the angle rotation sensor coarse channel system.

A voltage proportional to the cosine of the angle of rotation of the coarse channel sensor of the system is supplied from the device input 23 to the input of the second repeater 13, whose input voltage nocT imaeT to the input of the second detector 14, the output of which is a voltage proportional to the square of the coarse channel encoder angle system.

The output voltages of the first and second detectors 12 and 14 are fed to the inputs of the adder 10, the output of which forms a voltage proportional to the square of the steepness of the output voltage of the coarse channel and is independent of the angle of rotation of the coarse angle sensor of the two-channel system.

This voltage is applied to the input of the square root extraction unit 9.

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the output voltage of which enters the input of the second rectifier 8, at the output of which a voltage is formed proportional to the steepness of the output voltage of the coarse channel of the two-channel system. With increasing steepness, the voltage at the output of the second rectifier 8 increases and, conversely, with decreasing voltage decreases.

The output voltage of the second voltage of the sensor 8 is the control voltage for the attenuator 7. It enters the gate of the field-effect transistor 25 of the attenuator 7 through the limiting resistor 16. The voltage of the field-effect transistor 25 receives a reference voltage from the output of the voltage source at the output of the coarse channel a two-channel system, the output voltage of the first voltage of the motor 3 increases, i.e. the voltage at the first input of the switch 4, and the output voltage of the second voltage of the sensor 8. This leads to an increase in voltage on the gate of the field-effect transistor 25, which, in turn, decreases the voltage drop across the drain-junction voltage of the transistor 25, which leads an increase in voltage at the output of the attenuator 7, i.e. at the second input of the converter 4, by an amount equal to the value of the voltage increase at the first input of the converter 4.

When the steepness of the coarse channel output voltage decreases, the opposite occurs. Therefore, converter 4 switches keys 5 and 6 at a constant angle of rotation of the coarse channel sensor, regardless of the change in the steepness of the output voltage of the coarse channel of the two-channel system.

Compiled by Yu. Gladkov Editor N, Egorova Tehred I.Popovich Proofreader A, Zimokosov

Order 3996/39 Circulation 836 Subscription

VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5

) 11ol, polytechnic enterprise, Uzhgorod, st. Project, 4

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Thus, by introducing and in a contactless channel switching device for a two-channel attenuator system controlled by a voltage proportional to the steepness of the output voltage of the coarse channel, and excluding the reference voltage source, the comparator unit and the second adder, with a corresponding change in the connections inside the device, a functional simplification of the device is achieved while maintaining the stability of the channel switching zone (angle),

Claims (1)

Invention Formula A contactless channel switching device for a two-channel 0 system, containing a source of reference voltage, a series-connected top limiter, an amplifier, a first rectifier and a converter connected by outputs to the control inputs of the first and second keys connected by different codes, sequentially connected the first repeater, the first detector, the adder, the root extraction unit and the second rectifier connected in series the second repeater and the second detector, connected by the output to the second input of the adder, and the output of the amplifier is connected to the information input of the first key, so that, in order to simplify the device, it has an attenuator connected by an information input to the output of the reference voltage source the control input — with the output of the second rectifier, and the output — with the second input — transformed 1 e. five 0 five