SU1224628A1 - Device for testing tyre pressure in motor car wheels - Google Patents

Abstract

The invention relates to a measurement technique, namely, devices serving to monitor the air pressure in automobile tires when driving. The purpose of the invention is to simplify and expand the functionality of the device. When the pressure in one of the tires decreases, the filling time of counter 3 changes (increases), which overflows until the end of the measured interval and generates an even signal. the cut element OR 4 to the signal device 5, which is triggered, signals a decrease in pressure in the shield of any of the wheels. 1 il. (L with:

Description

The invention relates to a measurement technique, and specifically to devices used to monitor the air pressure in tires of automobile wheels when driving.

The purpose of the invention is to simplify and expand the functionality of the device.

The drawing shows a block diagram of the device.

The control device contains four sensors 1, the generator 2 of the reference frequency, four counters 3 pulse- ,. ow, element OR 4, alarm device 5.

The sensors 1 of the rotational speeds of the wheels are connected to the inputs. Resetting the corresponding counters of 3 pulses, the outputs of which through the element OR 4 are connected to the signaling device 5. The output of the generator 2 is the reference one. frequency is connected to the signal device 5. The output of the generator 2 reference frequency is connected to the counting inputs of the counters 3 pulses.

The device works as follows.

In the initial state, the counters of the 3 pulses are in the zero state. When the vehicle is moving, the sensors 1 generate signals representing a pulse voltage, the frequency of which is exactly proportional to the speed of rotation of the wheels without any errors, and the time interval for filling the counters with 3 pulses of the reference frequency generator 2 is determined.

12246281

The pressure control in the tires of each wheel is built on the basis of a continuous counting by the counter 3 of the number of pulses arriving at the counting input 5 from the generator 1 of the reference frequency for a fixed interval of the way (time),

When the pressure in one of the tires decreases, the interval of filling-in time of counter 3 changes (increases). Counter 3 of pulses overflows until the end of the measured interval and outputs a signal through the OR 4 element to the signaling device 5, (5 which is triggered, indicating a decrease in pressure in the tire of any of the wheels or several wheels at the same time. below the established norm.

Claims (1)

20 claims 25 thirty 35 40 A tire pressure monitor device containing the first, second, third and fourth wheel speed sensors, first and second pulse counters, an OR element whose output is connected in series with a signaling device, characterized in that, in order to simplify and expand the scope , the third and fourth pulse counters and the reference frequency generator are entered into it, with the first, second, third and fourth wheel speed sensors being connected to each of the control inputs Vågå, second, third and fourth pulse counters, counting inputs of which are connected to the reference oscillator. A tire pressure monitor device containing the first, second, third and fourth wheel speed sensors, first and second pulse counters, an OR element whose output is connected in series with a signaling device, characterized in that, in order to simplify and expand the scope , the third and fourth pulse counters and the reference frequency generator are entered into it, with the first, second, third and fourth wheel speed sensors being connected to each of the control inputs Vågå, second, third and fourth pulse counters, counting inputs of which are connected to the reference oscillator.