JPS6014113A - Method for measuring wiping ratio of windshield of car - Google Patents

Abstract

PURPOSE:To measure a wiping rate with a high precision by inputting coordinate values of the outline of a windshield and the outline of the wiping range of a windshield wiper to a position coordinate input device along these outlines and calculating the area of the wiping range and a wiping ratio on a basis of these inputted data. CONSTITUTION:A plan 3 where a windshield 1 and a wiping range 2 of the windshield wiper are indicated is fixed onto a writing surface 4 of a graphic tablet. Magnetostrictive wires are stretched in X and Y directions into a lattice shape under the writing surface, and electromagnetic waves are moved along this lattice. When a cursor 5 provided with a pickup coil at the tip is moved, a change of the magnetic field due to moving electromagnetic waves of the writing surface 4 is taken out by the pickup coil and is converted to coordinate data and is sent to an electronic computer 6. On a basis of this coordinate data, areas of the front window glass and the wiping range and a ratio of the area of the latter to the area of the former are calculated by the electronic computer.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an unmeasured force method for wiping a windshield of a motor vehicle.

In order to measure the wiping rate of IJ window glass by an automobile window cleaning device, the area of the area wiped by the conventional beam 1 and the front window plus and the window cleaning device was measured using a Branimeter (n11).
1 was constant 1, but the front window solas was l+n
I'm about X2 m long, so I'm from Buranimeter! '
It was too thick to be used with a trowel, requiring a lot of effort and repeated measurements, and had the disadvantage that the measurement accuracy also depended on the skill of the operator.

The present invention provides a method that makes it possible to easily and accurately measure the wiping rate, and the coordinate values are located along the contour of the front window glass and the contour of the wiping range of the window cleaning device in the drawing. The information is input to a coordinate input device and converted into coordinate data, and from this coordinate data, an electronic computer divides the areas of the front windshield and the wiping range and the ratio of the areas of the two.

Embodiments of the invention are described below with reference to the drawings.

As the position coordinate input device, for example, a 4953 type or 4954 type graphic tablet manufactured by Chic I-Lonics may be used. First, in FIG. 1, the crotch drawing 3 showing the front window glass J and the wiping range 2 of the window cleaning device is fixed to the lighten buzzer face 4-H of the graphic tablet. Beneath the surface of this writing surface, magnetic φ lines are forced along the grid in the X and Y directions, and electromagnetic waves move along these grids. When the cursor 5, which has a pickup coil at its tip, is moved along the front windshield 1 and the wiping range 2, the change in fMW caused by the moving electromagnetic waves of Leitenku's Leaf Ace 4 is picked up by the pickup coil, and the cursor 5 It is converted into digital information (coordinate data) corresponding to the position of and sent to the electronic subtraction machine 6.

In this h1 calculator 6, the coordinate values χj, Yi (j-]...) of the outline of the front window crow 1 are set by the cursor 5 to I
B' is inserted (step 11 in FIG. 2). This month TM includes all points f119 of a predetermined number M selected on the contour.
This is done and repeated until i = H (steps J2 and +3), where the first and second F(^
Step]/I from the target value Xi+Yi, the surface apex S of the front windshield 1 is reduced by 11% and is stored in the random access memory 11F in the range 11, =+, M'>i 6. Similarly, cursor 5
Accordingly, the ring ν1s of the wiping range 2 of the window cleaning device is j91 of
Coordinate values Xj of all points of constant N.

Yj (j=1...) is fetched (step] 5~)
7), in step 18, the area S' of this wiping range 2 is subtracted. Then, in step 19, the wiping rate CW = S' / S, which is the ratio of both areas S' and 5, is subtracted. At 20, this wiping rate Cw is displayed by an appropriate means.

To explain how to calculate the area, for example, in Figure 3, to calculate the area S of the front window glass, the coordinate value (Xi + Yi) on the contour is subtracted from the origin 0 of an appropriate rectangular coordinate system, and the vector is , let V be the vector subtracted from the coordinate values (Xi, Vi) to the next coordinate values (Xi+], Yin-]), and calculate the vector 2v×U. If the ordinal index I117Z of this W on the Z axis is positive, the vector is on the right side of the origin 0, and in this case, the area S has the surface I
? jl) Add S. Conversely, when the coordinate value Z of n is negative, I)S is subtracted from S. This is i21...M
If we iterate over this, we will find the area S.

Now, move the cursor around /E as shown in Figure 1.
In Figure 4, step 2
If ■ corresponding to 1 is O and S is 0-C, proceed to step 22, T+1. Baku1 in step 23
- the vector ht?
=-y: Increase Vxi.

Furthermore, in step 25, the area of the triangle 1) S is WIWed. In step 26, the coordinate value Z of Vx completion of the solid product is j
Determine whether it is E, and if it is 1F, this jrii
Add day aios to S (step 27), if negative]
) Subtract S from S. In this way, until ■ becomes M? t19
(Step 2C)). (2) Find the area S of +"+i+window glass with =M (step 110).

Note that the area S' of the wiping range 2 is also obtained in the same manner.

In this way, move the cursor of the craft tablet 1- to OiJ window glass and window covering + along the outline of the wiping range of 7, The machine subtracts the area of each area and uses the ratio to interpret the area, so unlike repeated measurements using a conventional planimeter, it can be measured in one operation regardless of the skill of the operator. Accurate eradication rate can be determined.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a flowchart thereof, FIG. 3 is a simple explanatory diagram, and FIG. 4 is a flowchart of area calculation. 1...Front window glass, 2...Wiping range, 3...Window drawing, 4...Writing→)゛-Face, 5...
Cursor, 6...electronic word IW8! . Patent Applicant: Toyota Motor Corporation Agent: Patent Attorney Heiji Donaka ""P.-7 Figure 1

Claims (1)

[Claims] On the construction drawing, manually convert the coordinate value into the position coordinate input device along the contour of the wiping range in 1. An automatic method for measuring the wiping rate of window glass, characterized in that the area of the window glass and the area to be wiped and the ratio of the areas of the two are calculated by an electronic depository machine from the coordinate data.