JPH1183684A - Testing method for traveling vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a testing method of a traveling vehicle capable of easily confirming whether or not the vehicle travels on a determined line and easily measuring the relation of the vehicle traveling position of the vehicle and a noise level, when the vehicle without a rail or a track travels on the line determined beforehand. SOLUTION: Markers M installed with a fixed interval are installed on a traveling road surface side so as to confirm whether or not the vehicle K travels on the determined line when the vehicle K without a rail or a track travels on a traveling line X-X determined beforehand. The marker M provided on the road surface side is a reflector, a sensor attached to the vehicle K is the detection sensor of an optical type and it is preferable to select the marker M and the sensor not affected by an environment for measurement outdoors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test method for a traveling vehicle, and more particularly to a method for testing a vehicle having no track when the vehicle travels on a predetermined line. The present invention relates to a method for confirming whether the vehicle is traveling and a method for measuring a relationship between a vehicle traveling position of the vehicle and a noise level.

[0002]

2. Description of the Related Art Conventionally, a method for testing the noise outside a vehicle, such as an automobile, is based on a maximum noise level when the vehicle passes through a predetermined noise measurement section by accelerating, coasting, or traveling at a constant speed. The noise level is set to be measured, and different levels are set for each country.

Further, in order to reduce the passing noise of the vehicle and the tire as a whole, it is known at which position in the noise measurement section the noise of the vehicle and the tire is maximized, and the noise is reduced by a combination thereof. . For this reason, it is necessary to measure at which position the vehicle is maximized. Also,
Although the noise is measured by the left and right microphones grounded at a certain distance from the traveling center line, the vehicle is required to travel on the traveling center line, although it is not specified in the noise measurement test method.

By the way, in a vehicle noise measuring method,
As a method of detecting the position of the vehicle during traveling,. A method using a laser non-contact velocimeter,. A method using a radar type speedometer is known. The method using a laser type non-contact speedometer is to install a laser type non-contact speedometer on the vehicle and use a pulse generated according to the moving distance together with the speed signal as a position pulse, so that it is transmitted to the noise measurement location by radio such as a telemeter It is.

A method using a radar type speedometer is as follows.
In this method, a radar type speedometer is grounded at a remote location so as not to affect the noise to be measured.

[0006]

However, in the former method using a laser type non-contact speed meter, the device has a large wind noise, which may affect the noise.
There is a problem that it is expensive, and a pulse is always generated when the vehicle is moving. Therefore, there is a problem that it is impossible to determine whether or not the vehicle has entered the measurement section using only this signal.

In the latter method using a radar type speedometer, when the position of a vehicle in a measurement section is a problem, it is strictly determined which part of the vehicle is detected by the radar. In this case, too, there is a problem that the vehicle is expensive, and a signal is always generated when the vehicle is moving. Therefore, as in the former case, the vehicle enters the measurement section only with this signal. There was a problem that it could not be confirmed whether or not it was done.

Further, in the above-mentioned test method, it is necessary to travel on the traveling center line, and it is necessary to check whether the center line of the vehicle coincides with the traveling center line, including the above-mentioned conventional method. Instead, the current situation is that the estimation is based on the difference between the left and right noise measurement values. However, there are actually some tires that have a difference in noise level between the left and right depending on the tire.Currently, there is no means to confirm whether the difference between the left and right noises is due to the vehicle being out of alignment with the center line of travel. There was a problem that I could not do it.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a test for a traveling vehicle which can easily confirm whether a vehicle having no track travels on a predetermined line when the vehicle travels on the predetermined line. It is to provide a method. Also,
Another object of the present invention is to provide a test method for a traveling vehicle that can easily measure a relationship between a vehicle traveling position and a noise level when a vehicle having no track travels on a predetermined line. To provide.

[0010]

In order to achieve the above object, a first test method according to the present invention is to provide a vehicle which does not have a track when traveling on a predetermined line. This is a test method of a traveling vehicle for confirming whether or not the vehicle has traveled, wherein a marker installed at regular intervals on a road surface side on which the vehicle travels is detected by a sensor provided on the vehicle side, and the marker position is confirmed in the vehicle. In addition to providing means capable of performing the above, outside the vehicle, the gist is to calculate a signal transmitted from a sensor provided in the vehicle and confirm whether the vehicle has traveled on a predetermined line. .

[0011] The second test method of the present invention is a method for testing a vehicle having no track when traveling on a predetermined line.
A test method for a traveling vehicle that measures a relationship between a vehicle traveling position and a noise level of the vehicle, wherein a marker provided at regular intervals on a road surface side on which the vehicle travels is detected by a sensor provided on the vehicle side, The gist of the present invention is to detect a vehicle position based on a signal transmitted from a sensor provided on a vehicle, transmit the signal to a noise measurement location, and automatically measure a relationship between a measured noise level and the vehicle position. It is.

Thus, according to the present invention, on the vehicle side,
By transmitting the sensor output wirelessly and simultaneously informing the driver in the vehicle (for example, converting to a sound according to a pulse train or counting pulses), it is possible to determine whether the vehicle is traveling on the traveling center line. The driver can know. On the other hand, at the noise measurement location, the number of transmitted pulses was counted, and if it was less than the number of markers installed, it was found that the vehicle ran off the center line,
Noise measurements can be disabled.

As means for detecting the relationship between the position and the noise, markers for position detection are installed at regular intervals (for example, every several tens of cm) on the road surface side in the noise measurement section, and the marker type is determined. A corresponding sensor is provided on the vehicle side, and the sensor output (pulse train of ON and OFF) is wirelessly transmitted to the noise measurement location, thereby sampling the measured noise for each transmitted position pulse. The relationship between the position and the noise level can be easily measured. Furthermore, by measuring the period (time interval) of the transmitted vehicle position pulse, it is also possible to measure the instantaneous vehicle speed for each vehicle position.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a schematic configuration diagram of a measuring device for carrying out a test method for a traveling vehicle according to the present invention, in which a vehicle K having no track has a predetermined traveling line X-
When traveling on X, in order to confirm whether or not the vehicle K has traveled on a predetermined line, markers M are installed at regular intervals (for example, every several tens of cm) on the traveling road surface side. It is.

The marker M provided on the road surface side is a reflecting plate such as a silver tape (or a plate finished with a material having a sufficient amount of reflected light and a glossy surface, such as silver paper and a mirror). As the sensor S to be attached, an optical detection sensor (for example, a photoelectric switch that detects the amount of reflected light, emits an LED light source, laser light, or the like,
In this embodiment, a reflection type photoelectric switch (PZ61L, manufactured by Keyence Corporation) having an infrared LED as a light source is used.

In addition, for measurement outdoors, the environment (sunshine,
It is preferable to select a marker M or a sensor S that is not affected by dust, dust, temperature, etc. (for example, using a sensor for detecting color and a sensor for detecting gloss, the material is finished with a material having a color and gloss corresponding thereto. (A PI-C40 manufactured by Keyence Corporation) is used. In addition, the traveling line X on the road surface side
On -X, a measurement section L1 for measuring the approach speed, a measurement section L2 for measuring the exit speed, and a noise measurement section Lx (about 20 m) are provided therebetween. In this noise measurement section Lx, the noise of the vehicle K is provided. Microphones 1a and 1b to be taken in are arranged.

The traveling vehicle K is shown in FIGS.
An optical sensor S for detecting the marker M is attached to the bumper portion as shown in FIG. 7, and the sensor S is provided with the transmitter 2 mounted on the vehicle K and the means 3 capable of confirming the position of the marker M (for example, It is connected to a pulse counter and a sounding body (buzzer). Further, a receiver 4 and a waveform shaper 5 are installed outside the travel line XX where the vehicle K travels as shown in FIGS.
The microphones 1a and 1b that take in the noise of the
It is connected to the.

The noise analyzer 6 receives a signal from the waveform shaper 5 and receives the signal from the waveform shaper 5 and the noise analyzer 6.
Is connected to the period measuring instrument 7 (counter) and the computer 8. Next, a first test method for a traveling vehicle according to the present invention based on the above-described configuration will be described.

First, a vehicle M having no track enters a measurement section L1 for measuring an approach speed at a predetermined speed, and travels in a noise measurement section Lx and a measurement section L2 for measuring an exit speed while sequentially accelerating. The markers M installed at regular intervals on the road surface are detected by a sensor S provided on the vehicle K. At the same time, the position of the marker M detected by the sensor S provided on the vehicle K is recognized by the driver in the vehicle by the confirmation means 3 such as a pulse counter and a sounding body (buzzer). A pulse signal is output to the receiver 4, and the waveform shaper 5 counts the pulse signal and performs waveform processing to check whether the vehicle M has traveled on a predetermined line.

Further, according to the second method for testing a traveling vehicle of the present invention, the vehicle M having no track enters the measurement section L1 for measuring the approach speed at a predetermined speed, and sequentially accelerates to measure the noise measurement sections Lx and Lx. While traveling in the measurement section L2 for measuring the escape speed, the markers M installed at regular intervals on the road surface side
Is detected by a sensor S provided on the vehicle K. And
Similarly to the first running test method, the vehicle position is detected by a signal transmitted from a sensor S provided on the vehicle K, and the signal is transmitted to the noise analyzer 6 at the noise measurement location. 6, the noise of the traveling vehicle K is sequentially input. Then, the vehicle position is detected based on the pulse count value of the period measuring device 7 (counter), and the computer 8 automatically measures the relationship between the vehicle position and the noise level measured by the noise analyzer 6.

As described above, in the first method for testing a traveling vehicle according to the present invention, the vehicle K transmits the sensor output wirelessly and simultaneously informs the driver in the vehicle K (for example, the sound according to the pulse train). , Or by counting the pulses) so that the vehicle K
The driver can know whether the vehicle is traveling on -X.

On the other hand, the noise analyzer 6 at the noise measurement location counts the number of transmitted pulses, and if the number is less than the number of markers M installed, the vehicle K has deviated from the center line XX. Understand, noise measurements can be invalidated.

As means for detecting the vehicle position, a marker M for position detection is provided on the road surface side in the noise measurement section Lx.
Are installed at regular intervals, a sensor S according to the type of marker is provided on the vehicle side, and the sensor output (ON / OFF pulse train) is wirelessly transmitted to the noise analyzer 6 at the noise measurement location, and measurement is performed. By sampling the noise that is present for each transmitted position pulse, the relationship between the vehicle position and the noise level can be easily measured. Further, by measuring the period (time interval) of the transmitted vehicle position pulse, it is also possible to measure the instantaneous vehicle speed for each vehicle position.

[0024]

The present invention is configured as described above.
It has the following excellent effects. . Compared to the conventional laser and radar methods used for vehicle exterior noise testing as a position detection means, the equipment is smaller, less wind noise is generated, the effect on noise is extremely small, and the vehicle position can be detected at lower cost. It is. . Whether the center of the vehicle is traveling on the traveling center line can be easily determined, and the accuracy of noise measurement itself can be improved by reducing the width of the roadside sensor. . In the conventional method, it was not possible to determine whether or not the vehicle entered the measurement section with only the signal, and an external signal synchronized with the measurement section was required.In the method of the present invention, only the marker point installed on the road surface was used. Since no signal is generated, other devices and signals are unnecessary. . By extending the marker to the entry / exit speed measurement section of the vehicle provided outside the noise measurement section, a speed measurement device usually installed outside the vehicle becomes unnecessary.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a measuring device for implementing a test method for a traveling vehicle according to the present invention.

FIG. 2 is an explanatory diagram showing a relationship between a transmitter and a receiver of a vehicle.

FIG. 3 is an explanatory diagram of a vehicle sensor and a detection circuit.

FIG. 4 is an explanatory diagram of a control circuit that measures a relationship between a vehicle position and a noise level.

[Explanation of symbols]

1a, 1b Microphone 2 Transmitter 3 Means capable of confirming marker position 4 Receiver 5 Waveform shaper 6 Noise analyzer 7 Period meter (counter) 8 Computer K Vehicle M Marker S Sensor XX Running line L1 Measurement section for measuring approach speed L2 Measurement section for measuring exit speed Lx Noise measurement section Lx

Claims (4)

[Claims] 1. A test method for a traveling vehicle, wherein when a vehicle having no track travels on a predetermined line, it is checked whether or not the vehicle has traveled on the predetermined line. Detecting markers installed on the road surface at regular intervals by a sensor provided on the vehicle side, and providing means that can confirm the marker position inside the vehicle, and outside the vehicle, from the sensor provided on the vehicle A test method for a traveling vehicle that calculates whether a vehicle has traveled on a predetermined line by calculating a transmitted signal. 2. In the vehicle, the marker position can be confirmed by converting the marker position into a pulse sound or counting pulses inside the vehicle, and a sensor provided on the vehicle outside the vehicle. 2. The test method for a traveling vehicle according to claim 1, wherein the position pulse of the marker is transmitted wirelessly from the device, and the pulse is counted at the transmitted position. 3. A test method for a traveling vehicle, comprising: measuring a relationship between a vehicle traveling position of the vehicle and a noise level when the vehicle having no track travels on a predetermined line. Detects markers installed at regular intervals on the road surface side with a sensor provided on the vehicle side, detects the vehicle position by a signal transmitted from the sensor provided on the vehicle, and transmits the signal to the noise measurement location. And a test method for a traveling vehicle that automatically measures a relationship between a measured noise level and a vehicle position. 4. When measuring the relationship between the noise level and the position of the vehicle, a marker installed on the road surface side on which the vehicle runs at regular intervals is detected by a sensor provided on the vehicle side,
In the vehicle, means for confirming the position of the marker is provided. Outside the vehicle, a signal transmitted from a sensor provided in the vehicle is calculated to determine whether the vehicle has traveled on a predetermined line. Item 4. A test method for a traveling vehicle according to item 3.