JPH041479Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention [Field of Industrial Application] The present invention relates to an apparatus for inspecting the operation of an anti-skid control system.

[Prior Art] Conventionally, the following devices are known as devices for inspecting the operation of an anti-skid control system mounted on a vehicle.

(1) Actual driving test on the test course As shown in Figure 6, a rug m made of a material with a small friction coefficient, such as a rug made of synthetic resin such as vinyl, or a stainless steel board, is spread on the test course r. The operation of the anti-skid control system is tested by driving the vehicle CA at a speed of several 10 km/h and checking whether the wheels lock up when the brakes are applied suddenly while the vehicle is running.

(2) Mock test using a drum tester As shown in Figures 7 and 8, the rear drum rd,
Place the vehicle ca on the drum tester dt, which consists of the front wheel drum FD and the power transmission part PT, and then test the vehicle on this drum tester DT.
The operation of the anti-skid control system is tested by driving the CA in a simulated manner and checking whether the wheels lock up when the brakes are suddenly applied. The driving force of the rear drum RD, which is rotated by the rear wheel RT, which is the drive wheel of the vehicle ca, is transmitted to the front wheel FT on the front drum FD via the two gearboxes GB of the power transmission section PT, the spline section SP, etc. communicated.

[Problems that the invention attempts to solve] (1) Actual driving test on a test course or
(2) Although tests such as mock tests using a drum tester can suitably test whether the anti-skid control system is operating,
However, the following problems were considered. In other words, in the actual driving test on the test course, (1)-a The judgment of whether or not the wheels are locked is based on the senses of the occupants, so there is a risk that the test results may lack reliability due to variations in the judgment results. Problem (1)-b: When a synthetic resin rug such as vinyl is used as a material with a small coefficient of friction, the durability of the vinyl becomes a problem and it is difficult to maintain it. When stainless steel materials are used, the initial cost increases; (1)-c In order to test the operation of the anti-skid control system, it is necessary to actually drive the vehicle on a test course each time. On the other hand, in a mock test using a drum tester, (2)-a: Problems caused by the senses of the occupants as in (1)-a above; (2)-b: Simulation The drum tester that performs the test is also a device that performs vibration and noise tests on vehicles, etc.
The so-called equivalent inertia weight of the rear wheel drum and the front wheel drum is increased (normally, the combined weight of the rear wheel and front wheel drum is 500Kg to 1500Kg). This results in
During rotation, a fairly large moment of inertia is generated in the rear and front drums. For this reason, when braking suddenly, each tire of the vehicle being braked attempts to stop the rear wheels and front wheel drums, which have a large moment of inertia, but since there are differences in the braking timing and braking force of each tire of the vehicle. , large torsional torque is generated in the shafts and power transmission parts of the rear wheels and front wheel drums. This torsional torque can cause damage to the gearbox, spline, etc. of the power transmission section, which are considered to have the weakest mechanical strength. The problem is that it is difficult to judge the operation of the anti-skid control system for each tire individually because the anti-skid control system is mounted on the rear and front drums. Therefore, there has been a desire for further improvement in the equipment for inspecting the operation of anti-skid control systems.

Configuration of the Invention [Means for Solving the Problems] The anti-skid control system operation inspection device of the present invention is constructed as follows in order to solve the above-mentioned problems.

The anti-skid control system operation inspection device of the present invention is a device for inspecting the operation of the anti-skid control system that is mounted on a vehicle and controls the braking force of the wheels based on the wheel speed. a drum roller that rotates, a drum roller drive means that drives at least one of the drum rollers on which an idler wheel of the vehicle is mounted, and a drum that is driven by the drum roller drive means and/or the drive wheel of the vehicle. rotation speed detection means for detecting the rotation speed of the wheels of the vehicle based on the rotation speed of the rollers; and after the detected rotation speed of each of the drum rollers exceeds a predetermined rotation speed, braking is performed by a braking device of the vehicle. and an operation determining means for determining the operation of the anti-skid control system of the vehicle based on the detected rotational speed of each wheel.

Here, the term "drum rollers" refers to any number of drum rollers that are provided in a number corresponding to each wheel of a vehicle, each wheel of the vehicle is placed on it, and each drum roller can rotate independently of the other drum rollers. It may be of any shape or material.

The drum roller driving means is a means for driving at least one of the drum rollers on which an idler wheel of a vehicle is mounted, and various types such as a so-called electric motor and an internal combustion engine can be considered. Note that this drum roller driving means may be provided one by one for each drum roller, or only one drum roller driving means may be provided for a plurality of drum rollers. Moreover, this drum roller driving means is not limited to the idler wheel, but may be configured to drive a drum roller on which the driving wheel of the vehicle is mounted.

The rotation speed detection means is a means for detecting the rotation speed of the vehicle wheel based on the rotation speed of the drum roller driven by the drum roller drive means and/or the drive wheels of the vehicle, and is a so-called rotation speed sensor. For example, it may be constructed using a rotary encoder or the like. Note that this rotational speed detection means does not necessarily have to be provided on all drum rollers, and the rotational speed of the drum roller on which the driving wheels of the vehicle are mounted can be determined using a tachometer or the like normally provided on the front panel of the vehicle. You can. Furthermore, there is no problem with a configuration in which the rotation speed of the wheels of the vehicle is directly detected by a rotation speed sensor or the like.

The operation determination means means that after the detected number of rotations of each drum roller exceeds a predetermined number of rotations, the vehicle's braking device is activated by, for example, a brake pedal being depressed by an occupant, and each of the drum rollers is braked by this braking device. means for determining the operation of the vehicle's anti-skid control system based on the rotational speed detected from the wheels of the vehicle. This operation determining means may be configured as a discrete circuit, a logic operation circuit, or the like.

[Operation] The anti-skid control system operation inspection device of the present invention operates as follows.

The anti-skid control system operation inspection device of the present invention detects the rotation speed of a vehicle wheel by a rotation speed detection means based on the rotation speed of a drum roller driven by a drum roller drive means and/or a drive wheel of a vehicle. After the detected number of rotations of each drum roller exceeds a predetermined number of rotations, the anti-skid control system of the vehicle is activated by the operation determining means based on the number of rotations detected from each wheel braked by the braking device of the vehicle. It works to determine.

[Embodiments] Next, preferred embodiments will be described with reference to the drawings in order to further clarify the structure of the anti-skid control system operation inspection device of the present invention.

Fig. 1 is a block diagram showing the configuration of an anti-skid control system operation inspection device 1 according to an embodiment of the present invention, and Fig. 2 shows a rear wheel equipped with an anti-skid control system in the anti-skid control system operation inspection device 1 according to the present embodiment. FIG. 2 is an explanatory diagram showing a state in which a driving vehicle (hereinafter referred to as a vehicle) is mounted and the operation of the anti-skid control system of the vehicle C is inspected.

The anti-skid control system operation detection device 1 of this embodiment includes a right front wheel inspection section 3 on which the right front wheel of a vehicle C is placed and rotates the right front wheel, a left front wheel inspection section 4 on which the left front wheel is placed and rotated, and a left front wheel inspection section 4 on which the left front wheel is placed and rotated. It is comprised of a right rear wheel inspection section 5 on which the vehicle is placed, a left rear wheel inspection section 6 on which the left rear wheel is placed, and the like.

The right front wheel inspection section 3 and the left front wheel inspection section 4 include
Twin rollers 8R, 8L, twin rollers 8R, on which the right front wheel and left front wheel, which are the idle wheels of vehicle C, are placed, respectively.
Drive motors 9R and 9L that rotate 8L, respectively;
Belts 10R and 10 transmit the driving force of the drive motors 9R and 9L to the twin rollers 8R and 8L, respectively.
Pulse encoders 11R, 11L, etc. are provided for detecting the rotation speed N of each of the rollers 8RR, 8LR on the rear side of each of the twin rollers 8R, 8L. As a result, the right front wheel and the left front wheel of the vehicle C placed on the twin rollers 8R and 8L are rotated by the drive motors 9R and 9L, respectively, and the rotation speeds of the right front wheel and the left front wheel are the same as those of the right front wheel and the left front wheel. Roller 8RR rotates at the same speed as each front wheel.
Pulse encoder 11R attached to 8LR,
This can be detected by counting the number of pulses generated by 11L.

The right rear wheel inspection section 5 and the left rear wheel inspection section 6 include
Twin rollers 14R, 14L and twin rollers 14R, 1 each carry the right rear wheel and left rear wheel, which are the drive wheels of the vehicle C, and are rotated by the right rear wheel and left rear wheel, respectively.
Pulse encoders 15R, 15L, etc. are provided for detecting the rotational speed N of each of the rear rollers 14RR, 14LR of the rollers 4L. The roller bearings 17 attached to each of the twin rollers 8R, 8L, 14R, and 14L are as follows:
This is for each roller bearing. Further, the equivalent inertia weight of each of these rollers is approximately 5 to 10 kg.

The pulse encoders 11R, 11L, which generate a number of pulses proportional to the number of rotations of each wheel of the vehicle C;
15R and 15L are pass/fail determiners 2 for determining the operation of the anti-skid control system shown in FIG.
0, respectively. This pass/fail judge 20
are the above pulse encoders 11R, 11L, 15
Each wheel speed V of the right front wheel, left front wheel, right rear wheel, and left rear wheel of vehicle C is determined according to the number of pulses generated by R and 15L.
is displayed on the vehicle speed display section 21. The pass/fail determiner 20 also includes an upper/lower limit speed setting section 22 that determines the upper limit speed Vh and lower limit speed Vl of each wheel speed V, a judgment display section 23 that displays the judgment result of the operation of the anti-skid control system, and the like. ing. Above above・
Upper limit speed set in the lower limit speed setting section 22
Vh and the lower limit speed Vl are calculated when the driver of the vehicle C depresses the brake pedal and decelerates by braking after each wheel speed V displayed on the vehicle speed display section 21 exceeds the upper limit speed Vh. It is used to measure the time Tm until each wheel speed V is decelerated from the upper limit speed Vh to the lower limit speed Vl. In addition, in this embodiment, the vehicle speed display section 21
is configured to display the wheel speed V as a three-digit digital value, and the upper/lower limit speed setting section 22 is configured to set the upper limit speed Vh and lower limit speed Vl using a so-called digital switch. Further, the determination display section 23 is configured to display the determination result by lighting a lamp.

Next, the operation of the anti-skid control system operation inspection apparatus 1 of this embodiment having the above configuration will be explained with reference to the graph of FIG. 4.

As shown in the inspection diagram in Fig. 2, the right front wheel, left front wheel, right rear wheel, and left rear wheel of vehicle C are placed on each of the twin rollers 8R, 8L, 14R, and 14L. The front right wheel and front left wheel of the
It is rotated by drive motors 9R and 9L via the drive motors 9R and 9L. On the other hand, the right rear wheel and left rear wheel of the driving wheels are
When the driver of the vehicle C depresses the accelerator, the vehicle C is rotated on the twin rollers 14R and 14L. The wheel speed V of each of these wheels is
Pulse encoders 11R, 11L, 15R, attached to RR, 8LR, 14RR, 14LR, respectively.
15L and displayed on the vehicle speed display section 21 of the pass/fail determiner 20 shown in FIG.

Next, when the wheel speed V of each wheel displayed on the vehicle speed display section 21 exceeds the preset upper limit speed Vh, as shown in the graph of FIG. 4, the driver of the vehicle C releases the accelerator pedal. At the same time, the inspector operates an electromagnetic clutch (not shown) to separate the drive motors 9R, 9L from the twin rollers 8R, 8L. ). After the above operation, the driver of vehicle C depresses the brake pedal to brake each wheel. At this time, the wheel speed V of each wheel is decelerated as shown in the graph of FIG. 4, but the braking time Tm from the preset upper limit speed Vh to the lower limit speed Vl is It is measured by The pass/fail determiner 20 is
This measured braking time Tm is compared with a predetermined standard braking time Ts, and if Ts≦Tm, it is determined that the anti-skid control system of vehicle C is activated, and if Ts>Tm, it is determined that it is not activated, and the determination result is is output to the judgment display section 23. This determination is based on the following reasons. That is, when the wheels of vehicle C are braked, if the wheels become locked, the twin rollers corresponding to the wheels are also suddenly braked together with the wheels, and the braking time Tm until the wheels are decelerated to the lower limit speed Vl is equal to the standard braking time Ts.
This is because it is shorter than .

In addition, the operation of the anti-skid control system can be determined by calculating the braking deceleration αm as follows using the measured braking time Tm, and comparing this braking deceleration αm with the standard braking deceleration αs. You may do so.

αm=(Vh-Vl)/(3600×9.8×Tm) αs=(Vh-Vl)/(3600×9.8×Ts) Therefore, when using braking deceleration αm, αs≧
When αm holds true, the anti-skid control system is operating.

Note that this braking deceleration αm has the advantage that it is not affected by changes in the speed V of each wheel at the start of braking, the upper limit speed Vh, and the lower limit speed Vl.

Furthermore, in addition to this, it is also possible to determine the area S as shown in the following equation using the upper speed limit Vh, the lower speed limit Vl, and the braking time Tm, and use this area S to determine the operation of the anti-skid control system.

S=(Vh-Vl)×Tm/2 In this case, since the calculated value to be determined is two-dimensional (area: time Tm×vehicle speed), it is possible to improve the determination accuracy.

According to the anti-skid control system operation inspection device 1 of the present embodiment described in detail above, the vehicle C
The wheel speed V can be detected for each wheel. This has the effect that the operation of the anti-skid control system mounted on the vehicle C can be determined for each wheel, and the operation of the anti-skid control system can be determined by measuring values (for example, as described above) without relying on the inspector's senses. This has an excellent effect in that it can be determined as the braking time Tm or the braking deceleration αm). Therefore, it is possible to obtain consistent and extremely reliable judgment results regarding the operation of the anti-skid control system. In addition, the anti-skid control system operation inspection device 1 of the present embodiment also uses driving motors 9R and 9L to drive the idle wheels of the vehicle C.
It is rotated using This eliminates the need for a device for transmitting the driving force of the drive wheels to the idle wheels, allowing for a simple configuration, and the twin roller 8
Since the equivalent inertia weight of R, 8L, 14R, and 14L is reduced (approximately 1/100 equivalent inertia weight of the conventional one), the moment of inertia of each roller when braking the wheels is reduced, increasing the durability of this device. It also shows an excellent effect in that it can be significantly improved. Furthermore, in this embodiment, the rollers on which each wheel of the vehicle C is mounted are Twirler rollers. Thereby, the simulated running of the vehicle C can be made stable, and safety can be improved without causing the wheels to protrude from above the twin rollers even during sudden braking. Furthermore, although the vehicle moves somewhat backwards during braking, since the pulse encoder is attached to the rear roller of each twin roller, there is also the effect that the wheel speed during braking can be accurately measured.

In addition, in this embodiment, the twin rollers 14R, 14
L is configured to be rotated by the drive wheels of the vehicle C, but as shown in FIG.
25L may be configured to rotate each of them. Thereby, it becomes unnecessary to perform work to make the wheel speed of the driving wheels caused by the amount of depression of the accelerator pedal of the vehicle C and the wheel speed of the idle wheels caused by the drive motor at the same level.

Effects of the Invention The anti-skid control system operation inspection device of the present invention has the effect of being able to determine the operation of the anti-skid control system mounted on a vehicle for each wheel, and also allows the inspector to check the operation of the anti-skid control system. It has the excellent effect of being able to be determined as a measured value without relying on senses. Therefore, it is possible to obtain consistent and extremely reliable judgment results regarding the operation of the anti-skid control system. Additionally, there is no need for a device for transmitting the driving force of the driving wheels to the idler wheels, and the structure can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing the configuration of an anti-skid control system operation inspection device according to an embodiment of the present invention;
FIG. 2 is an explanatory diagram of an inspection showing a vehicle placed on the same device, FIG. 3 is an explanatory diagram showing the pass/fail determiner 20, and FIG. 4 is an explanatory diagram of an inspection using the same device. FIG. 5 is a graph showing an example of the vehicle speed V when the vehicle's driving wheels are mounted. FIG. Figure 6 is an explanatory diagram showing how the operation of the anti-skid control system is inspected on a conventional test course.
7 and 8 are a perspective view and a top view showing the structure of a conventionally used drum tester. 1...Anti-skid control system operation inspection device, 3...Right front wheel inspection section, 4...Left front wheel inspection section,
5... Right rear wheel inspection section, 6... Left rear wheel inspection section, 20
...pass/fail judge, 21...vehicle speed display section, 22...
Upper/lower limit speed setting section, 23... Judgment display section, C...
...vehicle, ca...vehicle, dt...drum tester, fd...
...front wheel drum, ft...front wheel, m...rug, pt...
Power transmission section, r...test course, rd...rear wheel drum, rt...rear wheel.

Claims (1)

[Claims for Utility Model Registration] A device for inspecting the operation of an anti-skid control system mounted on a vehicle and controlling the braking force of the wheels based on the wheel speed, which is equipped with each wheel of the vehicle and rotates independently. a drum roller; a drum roller drive means for driving at least one of the drum rollers on which an idler wheel of the vehicle is mounted; rotation of the drum roller driven by the drum roller drive means and/or the drive wheel of the vehicle; rotation speed detection means for detecting the rotation speed of the wheels of the vehicle based on the number of rotations of the wheels of the vehicle; and after the detected rotation speed of each of the drum rollers exceeds a predetermined rotation speed, each of the drum rollers is braked by a braking device of the vehicle. An anti-skid control system operation inspection device comprising: operation determining means for determining the operation of the anti-skid control system of the vehicle based on the detected rotational speed of the wheels of the vehicle.