SU412617A1 - - Google Patents

Description

one

The invention relates to an apparatus for measuring the motion parameters of moving objects and can be used for processing by integrating various physical quantities converted into an oscillation frequency.

The known devices for controlling the speed and movement of an object, comprising an acceleration sensor, a pulse counter, a pulse generator, the input of which is connected to the output of the frequency adjusting unit, a coincidence circuit, an adder, a memory unit, are complex and not reliable enough; in addition, the accuracy of control, provided by known devices, is low.

In the proposed device, in order to simplify it, increase its reliability and control accuracy, in it the output of the acceleration sensor is connected to the input of a pulse counter, the outputs of which are connected to the first inputs of the matching circuits, the output of the pulse generator is connected to the second inputs of the matching circuits connected to the inputs of the adder, the frequency adjusting unit and the memory unit, the other outputs of which are connected to the outputs of the adder.

Ia the drawing shows the block diagram of the proposed device.

The device contains an acceleration sensor I, a pulse counter 2, coincidence circuit 3i-3, a pulse generator 4, a frequency adjustment unit 5, an adder 6, a memory unit 7.

The principle of operation of the device is based on the known ratios between the angular velocity (O and the angle of rotation φ, as well as between the angular velocity (U and the frequency of electrical oscillations

CU

df

2l

It is easy to verify that the integral of the acceleration of the object, expressed as the frequency f, is the phase of the electrical oscillation data f.

To determine the phase f, a binary counter of 2 pulses with module M is used, to the input of which frequency / in is applied. from the sensor

1 speed up. The codes set on the counter 2 pulses periodically change from O to M-1 at a repetition rate.

moreover, the change in phase f frequency from

O to 2 corresponds to the change of codes set on the counter 2 pulses, from O to M-1.

The phase reading f is made by reading the counter of 2 pulses through

circuits 3i-3p coincidence pulses with a frequency fc4., produced by the generator 4 pulses. In other words, the phase count f is carried out without stopping the counter of 2 pulses at times determined by the generator of 4 pulses. Readable codes are proportional to the controlled speed.

If the reading frequency / sc. turns out to be equal to fjssJM, then the read code will not actually change, since over the period of time between adjacent read pulses the code on the counter 2 pulses will change by M times. Before the start of integration there should be a ratio:

/ in / in "- / s, -L1.

When this condition is fulfilled, the values of the integral do not change, which corresponds to the zero value of the acceleration of the object.

Under the influence of various external factors fbx. and fc4. subject to drift, so there is a need to adjust one of these frequencies.

Due to the difficulty of adjusting the frequency / n „

Acceleration sensor 1 adjusts frequency fc4. 4 pulse generator. This function is performed by block 5 of the frequency control. The adjustment is carried out automatically before the start of integration. In addition, the frequency adjustment unit 5, made on the basis of a digital tracking system, issues commands to change the frequency / frequency. 4 pulse generator depending on the read code

With counter 2 pulses. With a code greater than M / 2, a command is issued to increase the frequency fc4., With a code smaller than M / 2, a command is issued to decrease it.

In order to control the movement of the object, i.e., to obtain the second integral from the acceleration of the object, an adder 6 is provided in the device, the input of which receives a code representing the first integral. The obtained information about the speed and movement of the object is recorded in the memory block 7.

Subject invention

A device for monitoring the speed and movement of an object, comprising an acceleration sensor, a pulse counter, a pulse generator, whose input is connected to the output of a frequency control unit, a coincidence circuit, an adder, a memory unit, characterized in that, in order to improve the accuracy of control and reliability of the device , in it the output of the acceleration sensor is connected to the input of a pulse counter, the outputs of which are connected to the first inputs of the matching circuits, the output of the pulse generator is connected to the second inputs of the matching circuits, the outputs of the matching circuits are connected to the inputs of the adder, frequency adjustment block n memory unit, the other outputs are connected to the adder outputs.

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