SU1486952A1 - Adjusting resistor resistance-to-motion converter - Google Patents

Description

The invention relates to instrumentation and can be used in devices operating from sensors with a frequency or code signal to eliminate the variations in the parameters of these sensors. The purpose of the invention is to increase the speed and stability of the conversion results in the code resistance regulating resistors. The device contains a generator 1, voltage controlled counter

25698Η7ΐ5

3

1486952 '

four

2, phase-sensitive detector 3, reference oscillator 4, frequency divider 5, decoder 6, registers 7-1,

7-2, 7-3, 7-4, element 8 OR-NOT, analog storage device 9, electronic switch 10, reference resistor and control resistors Кр 1 < ₃ , К ^. Introduction to the device of a stable reference oscillator, frequency divider, decoder, OR-NOT element and electronic switch allows you to convert resistance into code by converting resistance into frequency using a KS-generator, the frequency resistor of which alternately includes the resistors under study. At the same time, in order to ensure high stability of the conversion, the specified generator is controlled by voltage and is periodically included in the frequency self-regulating circuit when a reference resistor _with 1 slug is turned on in its frequency-generating circuit,

The invention relates to a measuring technique and can be used in digital measuring instruments operating from sensors with frequency or code output signal to eliminate the variation of parameters of these sensors, ¹

The chain of the invention is an increase in the rapidity and stability of the results of the transformation _with

The drawing shows a structural electrical block diagram of the device. thirty

A device for converting control resistors into a code contains a voltage controlled oscillator 1, a counter 2, a phase-sensitive detector 3, a reference oscillator 4, a triggers frequency divider 5, a decoder 6, ralettes 7-1, 7-2, 7-3 and 7 -4, element OR-NOT 8, analog storage device 9, consisting of capacitor C and resistor K., electronic switch 10, resistors: model 1 < ₀ and regulating K ^, K ₂ , K ₃ , K ^,

The operation of the device to convert to the code of resistance regul. resistors takes place in 2 stages: the auto-tuning of the frequency of the controlled generator 1 by the reference frequency ί ₀ , taken from one of the outputs of the trigger divider 5 frequency, and you give the frequencies да _g , T ₃ and ₄ related to the position of the sliders of the control resistors K _{1 #} К ^, К ₃ and К ₄ .

The switching of stages is carried out by the high-order bit of the frequency divider 5, which, being in the state "0", permits the phase-sensitive detector 3 to be charged and discharged ^! press the capacitor

the miner 9 (resistor K. ensures the stability of the system of automatic control of the frequency of the generator 1 by frequency част _ο ) until the frequency of the generator becomes equal to £ ₀ . In this case, the keys of the electronic switch 10 alternately connect the first four of its inputs to a zero potential and during the reference circuit of the voltage-controlled generator, the reference reference resistor K _o is connected, connected to the four inputs of the switch.

During the first stage of the auto-tuning of the frequency of the generator 1 with the frequency G _o , pulses appear at the output of the OR-NOT 8 element, which arrive at the gate input of the decoder 6, the installation input to the "0" counter 3 and the installation input to the initial position of the generator 1, in response impulses arriving at the gate input of the decoder 6, impulses appear alternately on its first, second, third and fourth outputs _with Counter 2 is set to "0", and generator 1 stops the output pulses and occupies the initial state. Phase-sensitive detector during gating pulses ceases to change the voltage at the input of the analog storage device 10.

After the end of the next pulse at the output of the element OR-NOT 8 auto-tuning of the generator 1 frequency

continues when an exemplary resistor is turned on in its timing chain “This continues until during the trailing edge of the next (fourth) pulse at the output of the element OR NOT 8 most significant time5

1A86952

6

the row of divider 5 is not set to state "1".

After this, the second stage of the converter operation begins, the Auto Frequency Tuning stops and the voltage at the output of the analog storage device 9 remains unchanged, ie, when the generator 1, when turned on the resistor K _o in its timing circuit, outputs a signal with a frequency ί ₀ . During the timing circuit of the generator 1, the electronic switch 10 turns on a resistor K ^, and the generator begins to generate a signal with a frequency of £ arriving at counter 2,

The next pulse at the output of element 8 gates the decoder 6 and appears at its fifth output, as a result of which the number from counter 2 is entered into register 7-1, counter 2 is set to "0", and generator 1 is reset, then generator 1 begins to generate a signal with a frequency of £ ^, because in its timed circuit the electronic switch 10 has a resistor 1 <2 <· on. Counter 2 counts the pulses from the frequency ^ ^ for the time until the next pulse at the output of element 8, which transfers the number from counter 2 to the register 7-2 and installs the count IR 2 in "0", Then during the timing chain of the generator 1, the resistor K _{3 is} turned _on and t, d „

Thus, during the issuance stage, generator 1 outputs signals with frequencies specified by resistors K., - K ₊ , which are alternately switched on in its time-determining circuit. After counting the frequency of the generator 1 by the counter 2 for a constant time between two pulses at the output of the element 8, the number from the counter 2 is transferred to one of the registers 7, from where the code corresponding to the value of the regulating resistor is output to the device. After transferring the code from the counter to the register 7-4, the trigger of the senior discharge of the divider 5 is set to "0", and the stage of automatic tuning of the frequency of the generator 1 starts with the resistor K included in its frequency-generating circuit. Then, after the end of the auto-tuning stage, a signal with frequencies £ ₄ , £ ^, £, and £ _{4 is} again generated by the generator 1 and t „d.

The stability of the conversion due to the adjustment of the controlled oscillator becomes comparable with the stability of the master oscillator (for example, a quartz oscillator), which can be very high. Thus, the instability of the conversion resistance of the regulating resistors becomes negligible. The speed is achieved due to the fact that the conversion for several resistors is carried out in one clock cycle.

Claims (1)

Claim A device for converting control resistors into a code containing a controlled generator, the first input of which is connected to the output of an analog storage device, a counter, a reference resistor, the first output of which is connected to the first terminal for connecting a control resistor, characterized in that, in order to improve performance and stability of results — transformations; a phase-sensitive detector, a reference voltage generator, a frequency divider trigger, a decoder, four registers, IPI-NE element, terminals for connection of n-1 regulating resistors and electronic switch, with the reference voltage generator connected to the trigger frequency divider input, three outputs of which are connected to the inputs of the OR-NOT element, the first output of the trigger frequency divider is connected to the second phase-sensitive input the detector, the fourth, fifth and test outputs of the trigger frequency divider are connected to the information inputs of the decoder and to the control inputs of the electronic switch, test the output of the trigger frequency divider connected to the resolution enable of the phase-sensitive detector, the first input of which is connected to the output of the controlled generator, the output of the phase-sensitive detector is connected to the input of the analog storage device, the output of the OR-NOT element is connected to the input of the decoder gating, with the third input of the controlled generator, to the installation input to "0" counter and with gating input 7 1486952 eight a phaeochguide detector, the output of the controlled generator is connected to the counter input, the output data bus of which is connected to the register inputs, the register record inputs are connected to the fifth, sixth, seventh and eighth outputs of the decoder, the second output of the reference resistor is connected to the first four inputs of the electronic switch, the first you · the water of the reference resistor is connected to the second input of the controlled generator and to the p-1 terminals for connecting regulating resistors, the other outputs of which are connected via the "electronic switch a common bus.