JPH0330860Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a speedometer inspection display device,
Specifically, the present invention relates to a speedometer inspection display device for inspecting whether a speedometer mounted on a vehicle such as a car or a train has desired accuracy and followability according to acceleration/deceleration.

(Prior Art) Conventionally, a speedometer inspection display device for inspecting a vehicle-mounted speedometer has been designed to display a standard pattern of acceleration/deceleration used for speedometer inspection as a graph on a board, and to display a lamp along the graph. A speedometer inspection display device is known in which a speedometer is embedded and a lamp is turned on every fixed number of seconds.

This device is installed near a speedometer inspection point on an automobile assembly line. At the same point, the assembled car is placed on a drum that can accelerate and decelerate at the desired speed transmitted from the tires, and the number of rotations of the drum (actually measured speed of the car) is
is displayed on the outside speedometer.

That is, when inspecting a vehicle-mounted speedometer, the inspector accelerates or decelerates the vehicle moment by moment to a speed according to an instruction by lighting a lamp on a board displaying a standard pattern. And at the same time as acceleration and deceleration,
The inspector visually checks the followability and accuracy of the speedometer outside the vehicle, which displays the actual speed of the vehicle detected by the number of rotations of the drum, and the speedometer installed inside the vehicle.

The accuracy of the on-vehicle speedometer was tested by performing this kind of work using one standard pattern.

(Problems to be Solved by the Invention) In the conventional speedometer inspection display device, the inspector has to check the speedometer inspection display device, which consists of a board that displays acceleration/deceleration patterns in a graph, and
This method is complicated because it is necessary to simultaneously visually check the external speedometer and the on-vehicle speedometer that display the actual measurement of the vehicle being inspected. There was also the problem of creating a time lag for adjustments.

(Means for Solving the Problems) This invention consists of an external speedometer that displays the actual measured speed of the car on which the speedometer is installed, a speedometer that is installed close to the speed display of the external speedometer, and a specified time after the start of measurement. A first display that is sequentially displayed at the standard speed display position after the elapse of time, and a standard speed display that is provided in proximity to the speed display of the speedometer outside the vehicle and the first display and that is displayed after a predetermined period of time that the first display clearly indicates. The problems of conventional speedometer inspection display devices are solved by providing a speedometer inspection display device characterized by comprising a second display that is sequentially displayed depending on the position.

(Function) The speedometer to be measured is installed so that the actual measured speed of the car on which it is mounted can be displayed on the speedometer outside the vehicle. Next, measurement is started by starting to clearly indicate the first display and the second display. The first display shows the standard speed after a certain period of time according to the standard driving pattern.
This is clearly indicated by the relevant speed display position on the speedometer outside the vehicle. The second display indicates the standard speed according to the standard driving pattern at a time point a predetermined time before the time indicated by the first display, by clearly indicating it at the standard speed display position.

Therefore, the vehicle-mounted speedometer inspector should accelerate and decelerate the vehicle to the speed specified by the first display, prepare for the next acceleration/deceleration according to the standard speed specified by the second display after a predetermined time, and then drive the vehicle. Trace according to the standard driving pattern. Then, by checking the followability and accuracy of the on-vehicle speedometer with respect to the outside speedometer during that time, the accuracy of the on-vehicle speedometer in use is determined.

(Example) Fig. 1 is a front view of an embodiment of this invention, Fig. 2 is a front view of an embodiment of this invention;
FIG. 3 is an enlarged sectional view of the same part, FIG. 4 is a schematic diagram of the state of use, and FIG. 5 is a running pattern diagram.

1 is a car, which in this embodiment is a front wheel drive passenger car. The car 1 has a speedometer mounted thereon at least on an assembly line or the like. Reference numeral 2 denotes a running drum, which is provided under the corresponding position of the tire 3 of the car 1 installed at the measurement position so as to be rotatable according to the rotation of the wheel. 4 is a speedometer outside the vehicle. The vehicle exterior speedometer 4 calculates the rotational speed of the tires 3 sensed by the running drum 2 into a running speed and displays the result. The calculation may be performed mechanically or electrically, and the display may be a liquid crystal display.

Reference numeral 5 denotes a display board made of a black acrylic plate, which is fixed to the surface of the outside speedometer 4 so as not to obstruct the visibility of the speed display of the outside speedometer 4. 0 of each speed display on the external speedometer 4
Two rows of lamps 6 and 7 are embedded in the display board 5 located outside every 10 km/h starting from Km/h. The lamp 6 is dark colored and the lamp 7 is light colored. The inner row of lamps 6 forms a first display C and the outer row of lamps 7 forms a second display D.

FIG. 5A shows a standard running pattern at the time of measurement. B represents a standard driving pattern that precedes A by 2 seconds. In this embodiment, the advance is 2 seconds, but other seconds such as 3 seconds may be used. The first display C shows the lamp 6 at the position according to the pattern shown in FIG. 5A after the start of measurement.
The second display is provided with lamps 7 at positions corresponding to the pattern shown in FIG. 5B so as to be lightable. The lamp lighting method is to read the standard driving pattern from the storage device 8 (RAM in this embodiment) after the start of the measurement, turn on the lamps 6 and 7 based on the read signal, and display the first display C, This is done by activating the second display D.

Therefore, the tires 3 of the automobile 1 are respectively installed on the running drums 2, 2 provided at measurement positions on the automobile assembly line. Next, the first display and the second display are activated by turning on the lamps 6 and 7 using the switch 9. The inspector located in the driver's seat of car 1,
Acceleration and deceleration are applied to the lamp position by operating the accelerator and brake. At this time, the second display lamp 7 clearly indicates the next speed in 2 seconds, so it is possible to prepare for the next operation. While accelerating and decelerating according to the display, the accuracy and followability of the on-vehicle speedometer are tested by comparing the on-vehicle speedometer with an external speedometer 4 that displays the actual speed calculated from the drive of the tires 3.

(Effect of the invention) Therefore, this speedometer inspection display device is less complicated and reduces the time lag for adjustment compared to the conventional speedometer inspection display device.

[Brief explanation of the drawing]

Figure 1 is a front view of an embodiment of this invention; Figure 2 is a front view of an embodiment of this invention;
FIG. 3 is an enlarged sectional view of the same part, FIG. 4 is a schematic diagram of the same in use, and FIG. 5 is a running pattern diagram. 1... Car, 2... Running drum, 3... Tire,
4...External speedometer, 5...Display board, 6,
7... Lamp, C... First display, D... Second display.

Claims (1)

[Scope of utility model registration request] An external speedometer that displays the actual measured speed of a vehicle equipped with a speedometer, and a speedometer that is installed close to the speed display of the external speedometer and that is sequentially displayed at the standard speed display position after a specified period of time has passed after the start of measurement. 1 display, a speed display on the speedometer outside the vehicle, and a second display which is provided in close proximity to the first display and which is sequentially indicated at the standard speed display position after a predetermined time period has elapsed from the time indicated by the first display.
A speedometer inspection display device comprising: a display.