SU964493A2 - Device for effecting transmission of measurement information out of rotating parts - Google Patents

Description

DEVICE FOR IMPLEMENTATION OF MEASURING TRANSMISSION

(54) INFORMATION WITH ROTATING PARTS

The invention relates to a measurement technique and can be used to transfer measurement information from parametric sensors located on rotating parts, in tests and studies of agricultural or other equipment;

According to the main author. St. No. 773431 known. a device for carrying out the transmission of measurement information from rotating parts from parametric sensors, comprising a feeding rotary transformer, a strain gauge bridge, a C-chain phase-shifting and an output rotary transformer.

However, this device has temporal and temperature instability due to aging and temperature drift of the elements of the phase-shifting circuit, which causes a drift of the information parameter of the output signal.

The aim of the invention is to improve the accuracy.

This goal is achieved by inserting a transistor switch, a transformer, into the device.

2

-filter capacitor, diode, resistance and amplitude discriminator consisting of successively connected two zener diodes connected inversely, and the primary winding of the transformer, the secondary winding of which through a diode is connected to the filter capacitor and through a resistance to a transistor switch that is connected to the transient switch diagonal strain gauge bridge.

to

The drawing shows the proposed device.

The device contains a supplying rotating transformer 1, having a winding 2 on its movable part intended

t5 for supplying bridge 3 and winding 4 forming with resistor 5 and. the capacitor 6 phase-shifting circuit, and the common point of the resistor 5 and the capacitor 6 is connected to one end of the output diagonal of the bridge 3,

Claims (1)

20 the second end, through which the winding 7 of the output rotary transformer 8, is connected to the secondary output winding 4, the amplitude discriminator consisting of sequentially connected Zener diodes 9 and 10, the primary winding 11, the transformer 12 is connected to the winding 2 of the powering rotating transformer 1, and The secondary winding 13 of the transformer 12 is connected via diode 14 to filtering capacitor 15 and through resistance 16 to key transistors 17, which are connected to the output diagonal of bridge 3 with their collectors. The device works in the following way. When the power supply voltage of the bridge 3 is lower by the stabilization voltage of the Zener diodes 9 and 10, the current through the winding 11 is absent and the transistor switch 17 is closed, in this case the imbalance of the bridge 3, adding to the voltage of the phase-shifting circuit, forms a phase-modulated voltage on the winding 7 of the output rotary Transformer 8 the information parameter-phase of the output signal does not depend on the voltage applied to the supplying rotating transformer. Increase the voltage applied to the supplying rotating transformer so that the supply voltage of bridge 3 becomes greater than the voltage stabilizing the diodes 9 and 10, then a current flows through the winding 11, the voltage drop across it across the winding 13, the voltage from which Mits diode 14, is filtered by a capacitor 15 and opens transistor switch 17 through resistance 16. In this case, the output diagonal of the bridge 3 is shorted, and the phase-shifting circuit is applied to the winding 7, at which the phase of the output signal corresponds to Nya Ullevi unbalance the bridge 3. Thus, the feeding amplitude shift keying of the power circuit may be performed only zero correction of the measuring path. The device for carrying out the transmission of measurement information from rotating parts improves the accuracy, reliability and reduces the cost of multi-channel measurement systems. The invention is a device for the transfer of measurement information from rotating parts by author. St. N 773431, characterized in that, in order to increase accuracy, a transistor switch, a transformer, a filter capacitor, a diode, a resistance and an amplitude discriminator consisting of two zener diodes connected inversely, and the primary winding of the transformer whose secondary winding it is connected through a diode to a filtering capacitor and through a resistance to a transistor key, which is connected to the output diagonal of the strain-resistant bridge. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 773431, cl. G 01 L 3/10, 1978.