SU362590A1 - Angle-voltage converter - Google Patents

Description

one

The invention relates to automation and measuring technology and can be used in tracking systems, calculating and measuring devices.

An angle-to-voltage converter is known that includes a linear rotary transformer. Such a target has a limited range of linearity conversion.

For the purpose of expanding the linearization conversion range, the transformer or stator winding switch, the threshold device defining the ends of the linear sections, the logic circuit, the displacement device and the summing device are additionally introduced into the proposed converter. Moreover, the input of the threshold device is connected to the input or output of a rotating transformer, the output of the threshold device is connected via logic to the input of the switch and the bias device, the inputs of the summing device are connected to the outputs of the bias device and the rotating transformer.

In order to improve the accuracy of matching the linear sections of the characteristic, the bias device consists of a controlled voltage divider, the input of which is supplied with a positive voltage of a traversing transformer, and a controlled inverter. The input of the latter is connected to the output of the divider, and the output is connected to the input of the summing device. In this case, the control inputs of the inverter i of the inverter are connected to the output of the logic circuit.

FIG. 1 is a block diagram of the proposed angle-voltage converter; in fig. Figure 2 shows the conversion characteristics (output voltage versus rotor angle).

The converter consists of a linear rotary transformer (LVT) 1 with windings 2 of the stator or rotor included in the LVT circuit through switch 3;

. the threshold device 4 connected to the input or output of the LHT; logic circuit 5; displacement device 6 and summing device 7.

Wiring 2 windings between each other

the ends of the linear portions of the characteristics of the LWT allows one to obtain an infinite piecewise linear characteristic of the transformation of the LWT (Fig. 2, a).

The introduction of an offset at the switching points allows the linear conversion characteristic of the transducer to be obtained (Fig. 2.6). In this case, for the fifth switching, the offset is; -Au, where is the bias voltage equal to the output increment

LVT voltages when the rotor angle changes

by 90 °. The input angle is defined by turning the rotor of the LCT The threshold device 4 fixes the ends of the linear sections. It can be made either in the form of an angle sensor, which fixes the zone of rotation of the rotor of the LHT relative to the zero position, or in the form of a device, which fixes the ends of the linear sections according to the value of the output voltage. The threshold device issues a signal to logic circuit 5, which controls the operation of switch 3 and displacement device 6. The bias device consists of a controlled voltage divider, and the input of which. Supplies a power supply voltage of the LHT, and a controlled inverter. The input of the latter is connected to the output of the voltage divider, and the output serves as the output of a controlled offset. The output voltage of the bias device and the voltage of the LHT are summed by device 7, the output voltage of which is the output signal of the converter.

Subject invention

Claims (2)

1. Angle-voltage converter containing a linear rotary transformer, characterized in that the purpose of extending the range of linearity of the transformation, the stator or rotor winding switch is additionally introduced in it, a threshold device determining the ends of the linear sections, the logic circuit, the displacement device and the summing device, the threshold input device being connected to the input or output of the rotating transformer, the output threshold device through a logic circuit connected to the input of the switch and the device bias, the inputs of the summing device are connected to the outputs of the device of the bias and the rotating transformer. 2. The converter according to claim 1, characterized in that, in order to increase the accuracy of matching the linear sections of the characteristic, the bias device consists of a controlled voltage divider, the input of which is supplied with the supply voltage of the rotary transformer and of the guided inverter, the input of which is connected to the outputs of the divider, and the output is connected to the input of the summing device, wherein the control inputs of the divider and inverter are connected to the output of the logic circuit. U- U - Mr. dLBa