SU819385A2 - Apparatus for diagnosis of transport vehicle technical condition - Google Patents

Description

(54) TOOL FOR THE DIAGNOSIS OF THE TECHNICAL CONDITION OF VEHICLES

The invention relates to the diagnosis of the technical condition of vehicles, in particular tractors, and can be used in the maintenance of a machine and tractor fleet.

On the basis of the auth. St. МБ 737641 a device is known for diagnosing the technical condition of vehicles, which contains a sensor unit for the parameters of operation of nodes and an information processing unit that includes a serially connected normalizer, k.

connected to the oscilloscope and interconnected memory unit and comparison unit, light panel connected to the comparison unit, sighting line and marker generators and controllable potential iometric transducers, the outputs of the latter connected to the input of the comparison unit and the sighting line generator inputs and a marker, the outputs of which are connected to the input of the oscilloscope 1.

The operator processes the signal displayed on the screen of the osilposcope with the help of the sighting line and marker, which are set at the required points of the signal under study. As a result of this, an equivalent electric value of g n is obtained.

However, when performing adjustment work, the operator is forced to repeatedly set the sighting line at the top of the signal to be examined in order to control the correctness of the adjustment, which leads to additional time costs.

The purpose of the invention is to reduce the measurement capacity during adjustment work.

This goal is achieved by the fact that the device for diagnosing the technical condition of vehicles is equipped with a multichannel signal recorder connected between the outputs of the memory unit, the sighting line generators and the marker and the normalizer and the input of the osiloscope.

FIG. 1 is a functional diagram of the device predicted in FIG. 2 signaling on the oscilloscope screen.

The device consists of a block of 1 sensor parameters of the nodes, connected to the normalizer 2, one of the outputs is connected to the first 3 signal input of the three-channel switch, and the other to block 4 of the comparison associated with block 5 of memory and the light board 6 The output of the multichannel switch is connected to an oscilloscope 7. The device also contains a generator 8 of the sight line 9 and a marker generator 10 of the marker connected to the second switch of the switch and controlled by teniometric converters 13 and 14 s with organs 11 and 12 accordingly. The last svva with outputs of block 4 of the comparison. The output of memory block 5 is connected to the third input of switch 3.

The signal switch alternately supplies the input of the oscilloscope 7, the signal under study 15, the signals of the upper 16 and lower 17 permissible values of the parameter, as well as the signal from the sighting generator 8 LIN II 9. Thanks to this on the screen. The oscilloscope does not produce images of the examined signal of the line of sight, as well as the upper and lower allowable values of the signal and eliminates the need for repeated measurements of the investigated signal during adjustment work, since the limits of adjustment are limited by the lines of the upper and lower allowable values on the screen of the oscilloscope.

When examining the parameters of a complex waveform and adjusting them, the voltage from block 1 through the normalizer 2 and the first input of multichannel switch 3 is fed to the input of the oscilloscope 7. In the first sweep period of the oscilloscope, an image of the signal under study appears on its screen 15. In the subsequent sweep periods To the oscilloscope input from block 5, voltage ursils are successively supplied corresponding to the upper and lower permissible values of the measured and controlled parameter of the signal under study, as well as the signal from the generator ora 8vizirnoy line 9. As a result etogo.na oscilloscope screen image 7 except issleduel1 th image signal there are upper 16 and lower 17, the parameter of the signal and target linii9.Glaz operator perceives all pixels on the screen as simultaneous.

If the vertex of the signal under investigation is between the upper and lower lines of permissible values, then the adjustment is not carried out, and the imposition of the sighting line 9 on the vertex determines the amplitude of the signal. If the signal top is above the top or below the bottom lines of permissible values, the operator changes the value of the signal with the help of an on-vehicle control on the vehicle so that its top takes up the position in the interval between the top and bottom lines of permissible values . Thereafter, the signal amplitude is measured using the sight line 9. When the upper and lower pines are allowed, the operator is prevented from repeatedly measuring the amplitude of the signal during the adjustment.

The use of the proposed device, for example, when adjusting the fuel injection pressure by a diesel engine injector, will reduce the total flow rate adjustment by 1.5–2 times.

Claims (1)

Invention Formula A device for diagnosing the technical condition of vehicles according to the author, St. No. 737641, which differs from the fact that, due to the reduction in the laboriousness of measurements during adjustment work, it is equipped with a multichannel signal generator connected between the outputs of the memory block, the sighting line and marker generators and the normalizer and the input of the oscilloscope. Sources of information taken into account in the examination 1. USSR author's certificate № 737641-, cl. Р 02 Р 17/00, 04/06/07 (prototype). Ampaishuda O