SU687356A1 - Device for the diagnosis of pressure in pneumatic tyres of vehicles - Google Patents

Description

(54) DEVICE FOR DIAGNOSTING PRESSURE

IN PNEUMATIC TIRES OF WHEELED VEHICLES

one

The invention relates to process equipment for diagnosing the technical condition of wheeled vehicles, namely for diagnosing internal pressure in pneumatic tires.

Devices are known for diagnosing internal pressure in pneumatic tires of wheeled vehicles by indirect measures, comprising a support plate, a measuring element and recording equipment l | However, these devices have a complex structure and provide low accuracy of measurements.

It is also known a device that is closest in technical essence to the present invention, intended for diagnosing internal pressure in pneumatic tires, comprising a supporting surface made with a number of parallel slots, and a measuring element in the form of discs fixed on one axis and mounted

In the slots of the slab with the possibility of re-placing along them -2. The axis of the disks in the device is equipped with a friction brake, and the recording equipment has an axis rotation angle converter. Moreover, the angle angle converter is designed as a photocell connected to the pulse counter of the photocell, a light bulb is mounted opposite the Joro TC, and between them is a disk with slots fixed on the axis .

Such an embodiment of the device allows to simplify the design and improve the accuracy of diagnosis, however, the noBbh accuracy is limited by the long spot of contact of the tire with the supporting surface.

The aim of the invention is to improve the accuracy of diagnosing internal pressure in pneumatic tires, 0

This is ensured by the fact that in a device for diagnosing internal pressure in pneumatic tires of wheeled vehicles containing a bearing surface with a number of parallel slots, a measuring element made in the form of coaxially arranged disks mounted in the slots of the supporting surface and recording equipment, Each disk is mounted on a separate swivel bracket and is equipped with a rotation angle transducer; an adder is inserted into the device, the inputs of which are connected to the transducer outputs Atelier rotation angles, and the output - to the recording equipment. The rotation angle transducer can be made in the form of a magnetic track with magnetic marks deposited on the lateral surface of the disk along a concentric circle and a magnetic reading head. FIG. 1 shows a schematic diagram of the plan; in fig. 2 - the same, longitudinal section. The device for diagnosing the internal pressure contains a support surface 1 with a series of parallel slots 2, each of which contains a measuring element consisting of a disk 3 made of a dielectric material and hinged on the bracket 4. The brackets 4 are fixed on the carriage 5, the support the rollers 6 of which are mixed; they are located in the guides 7. The movable part of the device is connected with the help of the cable 8 and the cable 9 with the mechanical drive of the longitudinal movement of the trolley 5. The lever 10 of the fricks is fixed to the trolley 5 Ion torus mosaic 11, which is pressed by means of a spring 12 to the end surfaces of each disk 3. On the side surface of each disk there is a track 13 made of ferromagnetic material, on which magnetic labels are applied by magnetic recording, magnetic readings are pressed to the ferromagnetic tracks of each disk heads 14, the winding pins of which are connected to the counter 15 pulses. The output of each pulse counter is fed to an adder 16 which performs the function of adding the number of pulses. The output of the adder 16 is connected to the indicating device 17 via a scale converter 18. A device for diagnosing the internal pressure works as follows. After the pneumatic tire is installed on the supporting surface 1, the driving yci effect acts on the pull 8 and moves the trolley 5, and hence the measurement element relative to the bridging 7. When the measuring disks 3 are brought into contact by the tire, the latter rotate relative to their c. When the disks 3 come out of the contact area with the tire, their rotation stops. Accidental turning of the discs is prevented by a friction brake. The angle of rotation of each disk 3 is proportional to the length of the contact of the disk with the tire, which is equal to the length of contact of the tire with the supporting surface in the given longitudinal section. The angle of rotation of the disk 3 is fixed by a pulse counter 15, to the input of which pulses are received from the magnetic head. The number of pulses is determined by the number of intersections by the magnetic head during the rotation of the disk of magnetic tags on the ferromagnetic track. The signals from each counter 15 pulses are fed to the adder 16, summed up, and a signal appears at its output equal to the sum of the longitudinal dimensions of the spot of contact between the surface and the reference surface in different sections. The output signal from the adder 16 is multiplied by a scale converter 18 by a factor , proportional to the distance between two disks. The resulting product is proportional to the area of contact of the tire with the surface and is recorded using your device 17. Formula of the invention 1. A device for diagnosing pressure in pneumatic tires of wheeled transport vehicles containing a bearing surface with a number of parallel slots, a measuring element made in the form of coaxially arranged disks installed in the slots of the bearing surface, and recording equipment, characterized in that, in order to improve the accuracy of pressure diagnostics, the disk is set flax on a separate pivoting arm and is provided with a rotation angle transmitter, the device is introduced into an adder having inputs connected to the outputs of the rotation angle transducers, and the output - to the recording equipment. 2. The device according to claim 1, characterized in that the converter

the rotation angle is made in the form of a magnetic track with magnetic markings applied on the lateral surface of the disk along a concentric circle, and a magnetic reading head.

Sources of information taken into account in the examination

1. USSR author's certificate .4. 540752, class, G 01 L 17/00, 1976. 52. USSR author's certificate

N9 469623, cl. G 01 L 17 / OO, 1975.