JP2737222B2 - Graphic display of chassis dynamometer test vehicle - Google Patents

Description

The present invention relates to an apparatus for graphically displaying a test vehicle in a chassis dynamometer on a CRT screen.

B. Summary of the Invention The present invention relates to a graphic display device of a chassis dynamometer test vehicle, wherein when performing a running test of the vehicle with a flat belt type chassis dynamometer, the test vehicle on the belt is graphically displayed on a CRT display device. By performing vehicle tests while observing the CRT screen, the information necessary for driving the test vehicle can be obtained visually, so that the vehicle test can be performed safely.

C. Conventional technology Conventionally, a chassis dynamometer adopts a configuration in which the driving wheels of a vehicle are mounted on a cylindrical rotating drum to test the running performance of the vehicle, as described in Japanese Utility Model Publication No. 53-28881. Was.
However, a so-called flat belt-type chassis dynamometer has been developed in which an endless metal belt is hung between a pair of rotating drums juxtaposed recently, and a vehicle is mounted on the metal belt to perform a running performance test. Was.

D. Problems to be Solved by the Invention When a vehicle is tested using the flat belt-type chassis dynamometer, the test vehicle is moved in the width direction of the belt, and the operator determines the traveling angle position of the vehicle under test. You need to know. As a means for knowing this angle, it is detected by a rotation angle detector provided in a vehicle mounting device described later. As shown in FIGS. 3 and 4, the vehicle mounting device 1 includes a vehicle support rod 5 supported on both sides of a flat belt 2 by columns 3, 4. The vehicle support rod 5 is provided with a rotating part 8 attached to a support 7 of the vehicle 6. The rotating unit 8 is provided with a rotation angle detector (not shown), and the rotating unit 8 is configured to be movable along the vehicle support rod 5.

The flat belt type chassis dynamometer configured as described above has the following problems.

(1) An analog type detector or a digital type detector is usually used as a rotation angle detector used to know the running angle position of a vehicle, but both detectors can grasp the angle as a numerical value. However, it is difficult to intuitively grasp the state of the vehicle on the belt as an image.

(2) Since the vehicle travels on the belt, the possible steering wheel angle is determined by the vehicle angle and the traveling speed.
For this reason, an accident may occur if the angle is incorrect. In particular, at the start of traveling, it is necessary to know the tire angle and the vehicle angle, but if both angles are known only as numerical values, the same problem as described above occurs.

(3) Just knowing the running speed as a simple numerical value may cause an accident if the driver turns the steering wheel suddenly.

E. Means for Solving the Problems The present invention relates to a chassis dynamometer in which an endless metal belt is hung between a pair of side-by-side rotating drums, a vehicle is mounted on the metal belt, and a running performance test of the vehicle is performed. A mounting device for rotatably and movably supporting the vehicle is provided, vehicle angle information is obtained from a vehicle angle information detector provided in the mounting device, and the center of gravity of the vehicle is determined based on a relative positional relationship between the mounting device and the center of gravity. Tire angle information is obtained from the tire angle detection mechanism attached to the vehicle, and the information is used to graphically display the vehicle on a CRT display device and the metal belt width indicating the range in which the vehicle can move in the lateral direction. Is also graphically displayed.

F. Function Information on the center of gravity of the vehicle, vehicle speed, and tire angle is obtained from the vehicle on the flat belt, and then the graphic display of the vehicle is displayed on the CRT display device. Since the vehicle is graphically displayed on the CRT display device, the driving direction, the vehicle angle, the steering wheel angle, and the like of the vehicle can be visually obtained even when the vehicle dynamometer is driven to perform a vehicle performance test.
Therefore, a safe vehicle running performance test can be performed even with a flat belt type chassis dynamometer.

G. Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 11 denotes a CRT display device, 12 denotes a vehicle angle detector, and the vehicle angle detector 12 is a rotating unit 8 shown in FIG.
Is used. Reference numeral 13 denotes a center-of-gravity position calculator, which calculates the relative position relationship between the mounting device 1 and the center of gravity 9 shown in FIG. 3 and FIG. Reference numeral 14 denotes a tire angle detector, and this detector 14 is provided in a tire angle detection mechanism attached to the vehicle 6. Reference numeral 15 denotes a reference point position calculator which calculates the relative position relationship between the mounting device 1 and the reference point.

Each output information of the detectors 12 and 14 and the arithmetic units 13 and 15 is a CRT.
It is input to the display device 11. When the above information is input, the CRT display device 11 graphically displays the vehicle on the CRT screen as shown in FIG. At this time, the width of the flat belt 1 is also displayed on the CRT screen, and on both sides in the width direction of the displayed belt, danger range identification display sections 16 and 17 indicating that there is a risk of the vehicle falling off the belt. Attention display units 18 and 19 are also displayed graphically inside display units 16 and 17.

When the display units 16, 17 and 18, 19 are color-coded, the CRT screen becomes more visible.

In the embodiment configured as described above, when the driving performance test of the vehicle is performed by driving the flat belt type chassis dynamometer and the vehicle, the detectors 12 and 14
From the information of the arithmetic units 13 and 15, the CRT display device 11 displays a graphic display of the vehicle, the belt width, and the display units 16 to 19 as shown in FIG. The operator can drive the vehicle without falling off the belt width while watching the graphic display of the vehicle shown in FIG. In order to prevent the vehicle from dropping off the belt, the driving unit can be driven more safely by providing the rotation unit 8 with a regulation sensor.

During the driving, the tire angle, the vehicle angle, and the traveling speed are input to an arithmetic device such as a computer (not shown) to calculate the traveling direction of the vehicle, the steering wheel operable angle, and the caution range, and display the calculation results. At this time, the traveling direction of the vehicle is indicated by an arrow 20 shown in FIG.

As a result of the above calculation, the attention range display sections 18 and 19 are formed so as to expand and contract separately on the left and right in accordance with the left and right positions of the vehicle. Then, when a vehicle enters the caution range display section 18, 19, the color of the display section is changed. Further, when a vehicle enters the dangerous area identification display sections 16 and 17, an alarm output is transmitted.

In the above embodiment, the vehicle width and the vehicle length can be set arbitrarily.

H. Effects of the Invention As described above, according to the present invention, when an operator drives a vehicle on a flat belt, the operator can drive the vehicle while looking at the screen of the CRT, and can determine the traveling direction of the vehicle, the angle of the vehicle, and the operation of the vehicle. It is possible to visually confirm the proper steering wheel angle and the lateral position of the vehicle, and to drive safely. This security is CR
This is possible because the dangerous driving range is apparent from the caution range displayed on the T screen, and also possible by calculating and displaying the driving speed, tire angle and vehicle angle. Further, at the start of traveling, it becomes possible because the vehicle travels in any direction. In addition, there is an advantage that the vehicle can be prevented from causing an accident due to excessive turning of the steering wheel during traveling.

[Brief description of the drawings]

FIG. 1 is a schematic structural explanatory view showing one embodiment of the present invention, FIG. 2 is an explanatory view when a graphic display is performed on a CRT display device, and FIGS. 3 and 4 are vehicles in a flat belt type chassis dynamometer. It is the top view and perspective view which show an attachment apparatus. 1 mounting device 2 flat belt 6 vehicle
8 ... rotating part, 9 ... center of gravity, 11 ... CRT display device, 12 ...
… Vehicle angle detector, 13… Center of gravity position calculator, 14 …… Tire angle detector, 15 …… Reference point position calculator, 16,17 …… Dangerous area identification display part, 18,19 …… Caution area display Department, 20 ……
Vehicle travel direction arrow, 21 ... Steering wheel operable angle display.

Claims (1)

(57) [Claims] 1. A chassis dynamometer for hanging an endless metal belt between a pair of side-by-side rotating drums, placing the vehicle on the metal belt, and testing the running performance of the vehicle, wherein the vehicle rotates and moves. A mounting device for freely supporting the vehicle; obtaining vehicle angle information from a vehicle angle information detector provided in the mounting device; calculating a center of gravity position of the vehicle from a relative positional relationship between the mounting device and the center of gravity; The tire angle information is obtained from the tire angle detection mechanism attached to the vehicle, and the information is used to graphically display the vehicle on the CRT display device and the metal belt width that indicates the range in which the vehicle can move in the lateral direction. Graphic display of test vehicle for chassis dynamometer.