JPS6395310A - Apparatus for displaying measuring position - Google Patents

Abstract

PURPOSE:To easily stop a tractor at a predetermined measuring position by the judgment of a driver, by providing an encoder to the wheel part of a carrier vehicle and mounting the processing system of the pulse signal outputted therefrom to the tractor. CONSTITUTION:A road surface measuring means 1 is constituted of a transmitter- receiver 10 using laser beam, a drive mechanism 11 for reciprocally moving said transmitter-receiver 10 in the direction crossing the advance direction of a carrier vehicle 2 at a right angle and a data processing system for operationally processing a receiving signal. The transmitter-receiver 10 is constituted by using a laser diode (or a unidimensional CCD sensor) as a signal transmitter (or receiver). An encoder 20 outputting the predetermined pulse signal corresponding to the number of rotations of one wheel 2A of the vehicle 2 is provided to said wheel 2A and constituted so as to be brought into the rolling contact with the outer peripheral part of the wheel 2A. By this constitution, since the encoder measures the moving quantity of the outer periphery of the wheel 2A, even when the outer shape of the wheel 2A changes by abrasion, no effect is exerted on the moving quantity of the outer periphery of the wheel 2A to a road surface E and measurement can be accurately performed. Further, the signal processing system 30 of the output signal of the encoder 20 can be also provided to the driver's cab of the tractor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a measuring device display device, and particularly to a measuring position display device suitable for use in a vehicle for measuring road surface irregularities.

[Conventional technology]

Road surface unevenness measurements have recently been performed at various locations. In this case, when specifying the measurement position, for example, irregularities in the transverse direction are measured at intervals of 10 (m) or 20 (m) in the traveling direction of the vehicle.

On the other hand, identifying the direction in which a vehicle is traveling has an important meaning for subsequent road surface repairs.Currently, workers mark the measurement points on the road surface in advance, and the driver of the towing vehicle can visually determine the measurement location. Therefore, a method is adopted in which a road surface unevenness measuring device is fixed at the mark position, or a towing vehicle is stopped at a predetermined position according to instructions from an outside worker.

[Problem that the invention seeks to solve]

However, in such conventional examples, stopping the towing vehicle accurately at the stopping position often relies on the driver's intuition, and as a result, it is difficult for the operator to stop the towing vehicle at a predetermined stopping position, for example on a slope. This method has the disadvantage of having to cooperate with the driver of the towing vehicle, which requires a lot of time and has poor work efficiency.

[Purpose of the invention]

The present invention improves the disadvantages of the conventional example, and in particular allows the driver of the towing vehicle to very easily stop the towing vehicle for the road surface unevenness measuring device at a predetermined measurement position based on his/her own judgment. Its purpose is to provide a measurement position display device.

[Means for solving problems]

Therefore, in the present invention, an encoder that outputs a predetermined signal corresponding to the rotation of the wheel of the transport vehicle or the amount of movement of the outer circumference of the wheel is attached to the wheel portion of the transport vehicle equipped with the road surface unevenness measuring means and transported. The above objective is achieved by adopting a configuration in which a towing vehicle that pulls the guided vehicle is equipped with a signal processing system that processes the pulse signal output from this encoder, converts it into a predetermined display signal, and displays it. [Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1, 1 indicates a road surface measuring means, and 2 indicates a transport vehicle. The road surface measurement means 1 includes a transmitter/receiver 10 using a laser beam, a drive mechanism 11 that reciprocates the transmitter/receiver 10 in a direction perpendicular to the traveling direction of the carrier vehicle 2, and a data processing system that calculates and processes received signals. (not shown).

Among these, the transceiver IO uses a laser diode as a signal transmitter and a one-dimensional CCD sensor as a signal receiver in this embodiment. The transport vehicle 2 is composed of a four-wheeled truck, and its center portion on the towing vehicle side is towed by the towing vehicle 3.

The minus wheel 2A of the conveyance vehicle 2 is provided with an encoder 2 that outputs a predetermined pulse signal corresponding to the rotation speed of the wheel 2A.
0 is attached. This encoder 20 is connected to the wheel 2A.
Although it may be directly connected to the rotating shaft of the wheel 2A, in this embodiment, the wheel 2A is configured so as to be in rolling contact with the outer circumference of the wheel 2A. Therefore, in this embodiment, the encoder 2
0 measures the amount of movement of the outer periphery of the wheel 2A, not the rotation angle, so even if the wheel 2A wears out due to the movement of the conveyance vehicle and its outer shape (especially diameter) changes, the outer periphery movement of the wheel 2A relative to the road surface E will not change. has no effect. Therefore, this embodiment has the advantage that distance measurement by the encoder 20 can be performed accurately and with high precision.

A signal processing system 30 for processing and displaying pulse signals output from the encoder 20 is provided in the driver's seat of the towing vehicle 3.

This signal processing system 30 includes a counter 31 that counts pulse signals output from the encoder 20 as shown in FIG.
, a signal processing circuit 32 that converts this counter output into a predetermined display signal, a set value input means 33 that regulates the operation of this signal processing circuit 32, and is activated by the output of the signal processing circuit 32. It has a configuration including a display section 34.

Among these, the set value input means 33 can arbitrarily input, for example, 10 (m3 intervals or 20 cm) intervals in the traveling direction of the road, or the total number of measurement points, etc. . Further, the signal processing circuit 32 processes the input signal according to the conditions set by the set value input means 33 and outputs a display signal for the display section 34. This display signal energizes a drive circuit 34A provided at the input stage of the display section 34 to drive the display section 34, which includes a light emitting element, a buzzer, and the like. The display unit 34 is configured to slowly turn on or sound a buzzer, for example, 2 cm before reaching the next measurement position, and to display a continuous display for a certain period of time within a predetermined range when the measurement point is reached.

Therefore, the driver of the tow vehicle 3 can easily recognize the measurement position without having to pay particular attention to the road surface E, and can accurately stop the guided vehicle 2 equipped with the road surface measurement device I at the measurement position. There are advantages.

In the above embodiment, the encoder 20 is connected to the wheel 2.
Although the case where the encoder 20 is configured to output a predetermined signal corresponding to the amount of movement of the outer circumference of wheel A is illustrated, the encoder 20 is
It may also be configured to output a signal corresponding to the rotation angle of. Even in this case, each of the four wheels 2A of the transport vehicle 2 is in rolling contact with the road surface E, so the wheels 2A
Since there is little friction between A and the road surface E and very little slippage, there is an advantage that distance measurement by the encoder 20 can be performed accurately and with high precision.

〔Effect of the invention〕

Since the present invention is configured and functions as described above, the next measurement position can be detected with high precision since the encoder is attached to the wheel of the conveyance vehicle, and errors due to slips etc. can be significantly minimized. Furthermore, by equipping this, the driver of the towing vehicle only needs to align the position at the beginning of the measurement, and from then on, the driver of the towing vehicle can check the road surface without paying special attention to the measurement point on the road surface or relying on cooperation with workers. It is possible to provide an unprecedented and excellent measurement position display device that can accurately stop a conveyance vehicle equipped with a measuring means at a measurement position.

[Brief explanation of the drawing]

Fig. 1 is an overall d diagram showing one embodiment of the present invention;
FIG. 1 is a block diagram showing an example of the signal processing system in FIG. DESCRIPTION OF SYMBOLS 1...Road surface unevenness measuring means, 2...Transportation vehicle, 2A...Wheel part, 3...Tow vehicle, 20...Encoder for, 30 ... Signal processing system, 31 ... Counter, 32 ... Signal processing circuit, 33 ... Set value manual means, 34 ...
...display section.

Claims (2)

[Claims] (1) An encoder that outputs a predetermined signal corresponding to the rotation of the wheel of the transport vehicle or the amount of movement of the outer circumference of the wheel is attached to the wheel of the transport vehicle equipped with the road surface unevenness measuring means. A measurement position display device characterized in that a towing vehicle that pulls the guided vehicle is equipped with a signal processing system that processes a pulse signal output from an encoder, converts it into a predetermined display signal, and displays the signal. (2) The signal processing system includes a counter that counts pulse signals output from the encoder, a signal processing circuit that converts the output of this counter into a predetermined display signal, and settings that regulate the operation of this signal processing circuit. 2. The measurement position display device according to claim 1, comprising a value input means and a display section that is activated by being energized by the output of the signal processing circuit.