SU444230A1 - Mechanical displacement transducer to code - Google Patents

Description

The invention relates to the field of auto, matic and computer technology and can be used to relate a measured analog value with a digital computing device.

Mechanical displacement transducers into a code are known, which contain a mechanical displacement transducer whose input and output are connected to the integrator via the first and second keys, a control device connected to a time interval-to-code conversion unit, an integrator and v forwarding keys, a null-organ included between the integrator output and the time interval to code conversion block.

However, the known transducers have significant faults caused by the temperature instability of the null organ, the integrator and the keys.

The aim of the invention is to increase the accuracy of the conversion.

The proposed transducer differs from the known one in that it has a mouth. A square-shaped variable-voltage driver was introduced, the input of which is connected to the control device and the output to the sensor input is mechanical. whom move.

FIG. Figure 1 shows the flowchart of the proposed & transducer into code; 2 shows a temporal diagram of the work of the heat generator.

The mechanical displacement transducer in the code (see Fig. 1) contains the form) - the worldr 1 is a rectangular alternating voltage connected through the key 2 and through a series-connected mechanical displacement sensor 3 and the key 4 to the integrator 5, whose output is zero The organ 6 is connected to a block 7 for converting a time interval into a code, a control device 8 connected to a driver 1, keys 2 and 4, an integrator 5 and a block 7.

The timing diagram shows the output signals A of the control unit, input to the integrator 5 and block 7, output signals B of the control unit, input to key 4, output signals C of the control unit, input to key 2, output signals of the driver, output signals E of the sensor, input integrators C of the integrator, input signals of the null-organ, output signals of the null-organ.

The operation of the mechanical displacement transducer to the code occurs in two cycles. Before each operation cycle, integrator 5 and block 7 are set to the zero state by signal A. Shaper 1 and control devices 8 are synchronized so that in both cycles the voltage conversions from the sensor and from the shaper during their connection to the integrator have opposite signs : ki In addition, in the first and second cycles of operation of the voltage from the sensor (voltage from the driver) also have opposite signs (see Fig. 2) during their connection to the integrator.

In each work cycle, the mechanical movement is converted into a time interval using integrator 5 in two cycles. During the first cycle in both cycles of the converter operation, the B key is opened with the 4j key 2 closed. The input of the integrator 5 comes from sensor 3, the output voltage E, which is integ. Surfed during the station {south of the fixed time interval T, the duration of which is set by control unit 8. During the second clock in both cycles of the converter, signal C opens key 2, key 4 is closed. At the entrance

the integrator 5 receives the voltage D. The conversion cycle ends at the moment when the voltage H becomes slave zero.

Thus, the voltage at the output of the integrator 5 in the first conversion cycle varies in the region of positive

values, and in the second cycle - in the field of negative values. Duration; The time interval proportional to the mechanical displacement is determined between the moment of switching the polarity of the voltage of the shaper 1 and the moment when the output voltage of the integrator 5 is zero. This moment is formed with the help of the zero-organ 6.

The time interval to code converter 7 generates a code equivalent to half the sum of the time intervals obtained in the first and second conversion cycles, i.e. code proportional to the mechanical movement.

Thus, the essence of the work of the proposed conversion; the gap of mechanical mixing into the code consists in the fact that the transformation of the mesanic movement into the code is carried out twice - with the forward and reverse values of the integrated voltages.

Subject invention

Mechanical displacement transducer to the code containing the sensor mechanically;

movements, input and output of which j

connected to integrator through the first and

second key, control unit G pbd

Key to time block. the interval in the code, the integrator to the control inputs of the keys, the null organ connected between the integrator's output and the time interval block in the code, which is designed to improve accuracy; a transformer body, a rectangular AC voltage driver is installed in it, i the input of which is connected to the control device, and the output BxOitjy of the sensor movement.

-i

Rig.

Fy

44423О