SU60700A1 - Device for transmitting measuring instrument readings - Google Patents

Description

The proposed device is intended to telemetry different quantities using two different frequencies for transmission.

Telemetry devices based on the transmission but the frequency difference line of two generators, the frequency of one of which is constant and the frequency of the other varies as a function of the measured value, are known. The disadvantage of such devices lies in the complexity of variable frequency generators independent of external conditions, and the accuracy of the system is insufficient.

In the proposed device, when the measured value changes, the ratio of the voltages of two currents of different frequencies changes while the values of the frequencies remain the same. The measurement is also made by the differential method; therefore, the device has greater accuracy.

The device sensor consists of two stationary mutually perpendicularly arranged frame coils 1–2, inside of which there is a third movable frame coil 3. It is fixed on the axis of the primary device, the readings of which need to be transmitted to a distance. The coil is fed with current frequency / 1 from generator A. and coil 2 with current frequency / 2 from generator

-6 scout Release 1 year

G |. Generators fi and A (low power) drive motor M.

The coil 3 is connected to the grid and through the source of grid bias 4 to the cathode of the amplifying lamp 5. The alternating current arising on the secondary winding of the transformer 6 enters the communication channel 7; the latter can be both wired and wireless.

At the receiving end there is a low-frequency amplifier 8. Two resonant filters F and Fg are connected to its output. Filter F is tuned to frequency / s and filter F-, to frequency / 2. The alternating currents of the frequencies Ii and I2 after the filters F and F are fed to the rectifiers B and measured with a meter 9. The scale of the meter 9 is graduated in terms of a telemetry value. When the axis of the primary device is rotated, the ratio of the voltage voltages fi and / 2 changes, which counts the logometer 9.

The advantages of the system are the following: the ability to transmit any primary devices even with a small torque, since the frame 3 is not loaded with current, and the possibility of using any communication line and sealing it (using the F1 and F2 magnetostrictive filters, can be significantly reduced

sew the difference between the frequencies / 1 and / 2); independence of transmission of indications from the state of the communication line and all amplifying devices, since the system is differential; When designing a facility, it is possible to use already available generators and filters, in particular, those used in installations for multiple tone telegraphy.

Subject invention

A device for transmitting measuring instruments readings using a sensor, in which the sensing part is powered by two generators of different frequencies, and the output part contains an amplifying lamp and output transformer, and a receiver in the form of a logometer, the windings of which are connected to the line through filters and rectifiers adapters, characterized in that as the sensing part of the sensor, an instrument is used, consisting of two stationary, perpendicular to each other coils fed by currents different frequencies from said generator and from the movable coil, placed inside the fixed and bonded to the primary axis of the meter readings to be transmitted to a distance.