CS265770B1 - Device for automatic determination of vehicle axle distances - Google Patents

Abstract

The device solves the automatic determination of the axle distances of vehicles moving on the road. A moving vehicle successively activates two sensors firmly connected to the road with its first axis, between which there is a constant distance. From the time of passage and the known distance of the sensors, the speed of the moving object can be determined. The second and further axes of the vehicle are activated on the first sensor, from where we determine their mutual distances from the known time intervals and speeds. The attached figure clearly shows this measurement principle. The device finds its full application in the investigation of axle loads of vehicles passing on roads or bridges. Its use can also be applied in other areas of transport engineering.

Description

265770 2

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a device for automatically determining the axial distances of vehicles that need to be recognized when measuring their axial loads that act on the road.

They are used to determine vehicle spacing! two ways. Indirect - with known vehicle types, the axial distance is accused! from the catalog values given by the manufacturer, which is then inserted into the evaluation device of axial loads. For atypical vehicles, which may be unknown to foreign trucks, axial data should be measured. It is a so-called direct mode. The vehicle is allowed to stop and then detects the distances between the centers of the individual axes, or between the corresponding points of contact between the tires and the road.

Such a method of obtaining axial distance data brings with it drawbacks. First, the measurement inaccuracy is due to the fact that the centers of individual axes cannot always be accurately determined. An important disadvantage, however, is that the vehicles under investigation need to be stopped even if dynamic weights are used to measure axial loads, i.e. we can weigh the driving time. The vehicles thus stopped increase the risk of collision. In addition, the obtained spacing data has yet to be inserted into the evaluation device, thereby significantly extending the time required for the overall calculation.

The above drawbacks are eliminated by the automatic axle distance determination device of the vehicles being examined, measured according to the invention, the principle of which is that the two sensors are fixed in the transverse direction of the road at their constant distance, the first sensor being connected to the first input of the source via the first signal former. the time pulse, and at the same time the second sensor is connected via a second signal former to its second input, the output of which is connected to the register input which connects to the input of the arithmetic unit, the output of which is connected to the display unit, the first output control unit being connected with a controlled input of the arithmetic unit, its second output with a controlled register input, and a third output with a controlled input of a time pulse source.

Automating the entire process of retrieving axle distance data brings benefits. Investigated vehicles do not have to stop, which not only accelerates the measurement process, but also reduces the risk of collision, especially in heavy traffic. It removes the self-reflective factor that can adversely affect measurement accuracy while reducing the number of people needed to operate the device. Axial spacing data is automatically transferred to the axial load evaluation device. As vehicles are measured on the road, the idling of the engines is eliminated, thereby substantially increasing the degree of hygiene in the workplace.

The accompanying figure shows a device according to the invention. In the left part of the individual blocks, there are inputs, in the right outputs and in the lower part of the blocks 5, 6, T, the control inputs or outputs are shown. outputs.

The two sensors 1 and 2 are fixed in the transverse direction of the road at their constant distance, the first sensor 2 being connected to the first input of the time pulse source 5 via the first signal former 3, and the second sensor 2 being connected to the other by the second signal shaper. the input of the source 5 being connected to the input of the register 16, which connects to the input of the arithmetic unit 1, the output of which is connected to the display unit f1, the first output of the control unit 9 being connected to the controlled input of the arithmetic unit 2 »3e3 the second output of controlled register input 6 and third output with controlled input of source5. time pulses.

The forward car activates its first axis with a first sensor 1 which triggers a time pulse source 5 via a first signal former 3. By passing the vehicle, the timing of the transition of the other axes through the first sensor 2 ' After passing all axes through the first sensor 1, the first vehicle axis activates the second sensor 2, which stops the time pulse source 5 via the second signal former 2. This is also the instruction for the control unit 9 to enable the operation of the arithmetic unit 7, which through the register

Claims (1)

OBJECT OF THE INVENTION ' Apparatus for automatically determining the axial spacing of vehicles when measuring their axial loads, characterized in that two sensors (1) and (2) are fixed in the transverse direction of the road at their constant distance, the first sensor (1) being through the first molder ( 3) the signals connected to the first input of the time pulse source (5) and at the same time the second sensor (2) is connected to its second input via the second signal former (4), the output of this source (5) being connected to the register input (6); which is connected to the input of the arithmetic unit (7), the output of which is connected to the display unit (8), wherein the first * output of the control unit (9) is connected to the controlled input of the arithmetic unit (7); 6) and a third output with a controlled input of the time pulse source (5).