SU845101A1 - Method for measuring fluidic medium flow rate - Google Patents

Description

(54) DEVICE FOR MEASURING THE VELOCITY OF GAS FLOW OR LIQUID

one

The invention relates to the field of measurement of motion parameters and can be used to measure speed, leakage angle and other flow parameters.

A device is known for measuring the flow rate of a gas or liquid, containing its source of ion tags, made in the form of an arrester connected to a high-voltage generator, and a receiver of a label connected to a measuring circuit, one of the receivers being made circular, and the second curvilinear particular in the form of the Archimedes spiral 1.

This device does not have sufficient sensitivity to the direction of flow.

The purpose of the invention is to increase the sensitivity to the direction of flow.

For this, the device is equipped with additional curvilinear receivers connected to the measuring circuit, with sector circular receivers inserted into the device connected to the inputs of the logic unit, each connected to a measuring circuit, placed between each curvilinear receiver and the source of tags.

The drawing shows the proposed device.

The device contains a source of labels 1, a receiver 2, having a circular shape, and curvilinear receivers 3, which are shifted relative to each other by the corners JTi, having a shape, for example, of Archimedes spirals. Receivers 2 and 3 through the amplifiers 4 are connected to the measuring circuit 5.

Between the source of labels 1 and receivers 3 additional sector circular receivers 6 are placed, through amplifiers 7 connected to logic block 8, the inputs of which are also connected to the output of the measuring circuit. We are 5.

Receivers 2, 3, and 6 are made as insulated from each other conductors placed in the plane of measurement on the board of a dielectric material.

Claims (1)

Measuring circuit 5 includes circuit 9 for determining the time interval G-, passing the main basic distance from the bit to the receiver 2 by the label, circuit 10 for determining the time interval t2 of passing the auxiliary base distances from the bit to the receiver 3, and circuit 11 which measures the ratio of the intervals t2. The inputs of circuits 9 and 10 are connected to the generator 12 and through amplifiers 4 to receivers 2 and 3, and their outputs are connected to the input of circuit 11. The output of circuit 11 is connected to the inputs of circuits 13 located in logic block 8 and performing logic operations I. The second inputs of the circuit 13 are connected to the outputs of the amplifiers 7, and the outputs are connected to the inputs of the adders 14. The outputs of the adders are connected to the circuit 15 that performs the logical operation OR. The output signals Vj and oij, which determine the velocity vector of the measured flow, are taken, respectively, from the outputs of circuits 9 and 15. The device operates as follows. During the measurement, the generator 12 generates a pulse that is applied to the arrester. The latter, due to the spark sample, creates a mark in the form of a cloud of charged ions, which moves together with the measured flux. A pulse from generator 12 simultaneously starts circuits 9 and 10. When it crosses receiver 2, it outputs a signal to circuit 9, which records the time interval 1g, the passage of the mark of the main base distance J). At the moment of intersection by the label of one of the receivers 3, it outputs a signal to the circuit 10, which fixes the interval TI of the passage of the auxiliary reference distance p R + Kdi (where K is the coefficient determining the Archimedes spiral steepness and, therefore, the receiver's sensitivity to the flow direction) The output signal V of circuit 9, corresponding to the magnitude of the flow rate, goes directly to the consumer and to circuit 11, where the output signal of circuit 10 also arrives. Scheme 11 measures the ratio of the intervals t and T (for example, the ratio Ti / fi), one meaningfully determining the position of the trajectory of the tag relative to one of the receivers 3. The output signal of the circuit 11 is fed to the logic block 8, which, taking into account which of the receivers 3 intersects the mark, forms the output signal ccd determining the direction of the measured flow relative to the specified axis the intersection of the trajectory of the labels of the receiver 3, located in the sector of the angle Y |, C located in the same sector of the receiver 6 through the amplifier 7 to the corresponding input of the logic unit 8 receives a signal corresponding to the angle o t the location of the beginning of the receiver 3 relative to a given axis. This signal is fed to the input of the AND circuit, which, in the presence of the output signal of the circuit 11, opens and delivers both signals to the corresponding adder 14. In the adder-14, the signals determining the ratio of the intervals TI to the initial angle θ (. The location of the corresponding receiver 3 are summed up) dj, which determines the magnitude of the measured angle d of the flow direction. The signal from the output of the corresponding adder through the OR circuit goes to the consumer. When the marker crosses receivers 3 and 6 in the sector with an angle d to the output s The circuit of the circuit 11 is summed up by a signal that determines the sum of the c6 + q shift angle of the beginning of the receivers of this group relative to a given axis, etc. Thus, the introduction of additional spiral receivers allows increasing the steepness of each individual Archimedes spiral, and therefore their sensitivity without increasing the total dimensions of the receiving part of the device. The latter is especially important when using the device on aircraft. Information about which of the spiral receivers intersects with marks form a sector reception nicks and treated in the logic block. Apparatus of the Invention A device for measuring the flow rate of a gas or liquid according to the author. St. JSfo 655975, characterized in that, in order to increase sensitivity to the flow direction, it is equipped with additional curvilinear receivers connected to the measuring circuit, and pie-pie circular receivers inserted into the device are placed between each curvilinear receiver and the source of tags to each of which a measuring circuit is connected. Sources of information taken into account during the examination 1. USSR author's certificate No. 655875, cl. G 01 P 5/18, 1977 (prototype). ffy fJ S7 GTG r 1j  tp fO 5 -II-tJ j