JPS6056654A - Wiper control device - Google Patents

Abstract

PURPOSE:To simplify structure and reduce cost, by selectively and cyclically reading data as set according to a vehicle speed data and a count output from a counter. CONSTITUTION:An A/D converter 1 converts a vehicle speed signal as received to 5 bit digital signals A6-A10 and supplies the digital signals to ROM2. An oscillator 3 generates a pulse signal having a constant period and supplies the same to a counter 4. A count result is supplied as 6 bit count outputs A0-A5 to the ROM2. Some memory areas are addressed by the digital signals from the A/D converter 1, and data is read from the counter 4. The data D0 as read is supplied to a controller 5, and simultaneously supplied as a reset signal to the counter 4. The controller 5 controls to drive a wiper motor 6 according to the data D0 as received.

Description

Description: FIELD OF THE INVENTION The present invention relates to a wiper control tIII device, and more particularly to a wiper control device for controlling the operating interval of a windshield wiper in accordance with, for example, the traveling speed of a motor vehicle.

Description of the Prior Art Windshield wipers on automobiles, etc., are used to remove raindrops that adhere to the windshield during rain.However, when the windshield wiper is operated continuously when there is little rainfall, there are fewer raindrops on the surface of the windshield. This is abnormal because the rubber wiper blade rubs against the glass surface! ! Not only does this generate a grinding noise, but it also causes disadvantages such as accelerating the wear of the wiper blade, and applying a brake to the movement of the wiper blade due to friction and overloading the motor that drives it.

Therefore, as a device to prevent the above-mentioned inconveniences,
Conventionally, devices have been proposed and implemented that operate windshield wipers intermittently when rainfall is low. However, such a conventional control device operates intermittently regardless of the driving condition of the host city, so even if the windshield wiper movement interval is adjusted to match a certain driving speed,
There is a drawback that the operation interval becomes inappropriate due to changes in the running speed. In other words, since the amount of rainfall on the windshield varies greatly depending on the driving speed, it is necessary to set an operation interval appropriate to the driving speed of the vehicle.

In order to eliminate the above-mentioned drawbacks, a control device has been proposed that automatically controls the operation interval of the windshield wiper according to the traveling speed (vehicle speed) of the automobile. As a conventional control device of this type, there has been a control tR1 device composed of discrete components, such as the device disclosed in Japanese Patent Application Laid-open No. 53-11431. However, in such a control device, the circuit configuration becomes complicated, and it is difficult to perform complex control such as non-linearly controlling the operation interval of the window 1 to the wiper with respect to the vehicle speed. was d6. In contrast, other conventional control devices
There was a device that was controlled using a microcomputer. However, although such a control device can perform complex control, it has the disadvantage that the device is expensive and expensive.

OBJECTS OF THE INVENTION Therefore, the main object of the present invention is to provide a wiper control device that can automatically control the operation interval of a windshield wiper according to vehicle speed, and that is simple in construction and inexpensive.

SUMMARY OF THE INVENTION To summarize, the present invention provides a non-volatile memory (ROtv
l), addresses a predetermined storage area of the ROM using the medium-speed data, and counts the J1 frequency signal to obtain data related to the operation interval of the windshield wiper stored in the specified storage area. The reading is performed based on the count output of the counter.

The present invention will be described in more detail below with reference to embodiments shown in the drawings.

DESCRIPTION OF EMBODIMENTS Figure 1 is a 10-dimensional diagram showing an embodiment of this invention.
43, an f-word (analog signal) corresponding to the vehicle speed of the automobile is input to the A/D converter 1.

This vehicle speed signal can be generated by conventionally known methods such as a tachogenerator. To 7,
-''D component t1 converts the given vehicle speed signal into a 5-bit digital (i-th (c, - to 10)) 1, RO
It can be seen on M2. On the other hand, the oscillator 3 oscillates a pulse signal with a constant period.1. 5 degrees is applied to the counter 1, and the counter 4 counts this pulse signal. The count result of the counter 4 is given to the ROM 2 as a count ratio E (Ao =Ag) of 6 bits].

Here, the ROM 2 has a plurality of storage areas, as will be described later, and each storage area stores data regarding the operation interval of the windshield wiper depending on the vehicle speed. And A
One of the storage areas is addressed by the digital signal from the /D converter 1, and the data stored in the designated storage area a is successively output by the number 81 output from the counter 4. The data Do read out in this manner is provided to the controller 5 and also to the counter 4 as a reset signal. The controller 5 controls the wiper to -96 in accordance with the supplied data DO.

FIG. 2 is an illustrative diagram C corresponding to FIG. 1 and showing the recording area of the ROM 2. In the figure, this ROM 2 is configured so that an address can be specified using 11-bit address data (Δo-Alo>).

Here-(, 11 bits (top 5 of the address data of ~)
The bit address data (A6-△1°) is the above-mentioned △/
It is composed of vehicle speed data from the D converter 1.

Therefore, the ROM2 stores O according to this vehicle speed data.
It is divided into 321 designated areas from 3'1 to 3'1. Further, among the 11 bits of address data, the lower 6 bits of address data (Ao to A5) are constituted by the count output from the counter 4 mentioned above. Therefore, each of the 32 m areas IJI, which are addressed by the vehicle speed data, is further divided into 04 areas from O to 63. One area of the data area of ROM 2, which is addressed by L< as described above, is composed of 872 I·(DO-D?). Note that in this embodiment, only the least significant bit D is used, so data is set only in this part, and the other bits D
0 or - is written in all areas 1 to D7. here,
5 bits of J21ffx! 4I'J data area 32 addresses specified by area 4a (J: If you look, the least significant bit DO of the data area is first followed by 0, then changed to 1 in the middle, then 1 continues) What is the summer pattern?The operation interval of the windshield wiper is determined by this pattern, which will be described later.And, t:Therefore, the butter that visits each storage area]/ is the corresponding y5 pattern. 1; The pattern of operation intervals changes depending on the vehicle speed.

Next, the operation of the embodiment shown in FIG. 1 will be explained.

Now, if you are driving at the speed that your car is traveling at,
A vehicle speed signal corresponding to the traveling speed is given to the A7/1 converter 1 and converted into 5-pit vehicle speed data. One of the 32 storage areas of the ROM 2 shown in FIG. 2 is designated by this vehicle speed data.

On the other hand, the counter 4 counts the pulse signals of a certain frequency group given from the oscillator 3, and outputs the count outputs of each of the 6 bits 1 to RO.
Give to M2. As a result, in ROM2, the aforementioned vehicle speed data is stored in the memory area designated as address J.
Addresses of 64 areas are sequentially specified for each block δ and the like.

In Togoro, as mentioned above, data t! ! At the bottom of i1g (Ilhiso:・D,), O is passed in succession after R. Therefore, the old number of counter 4 is incremented sequentially.

Here, when the count value of the counter 4 reaches a certain value, the least significant bit DQ in the data area becomes 1, thereby starting the roller motor 6. Further, the counter 4 is reset by 11''1 of the least significant bit l)r.

Therefore, the C1 counter 4 starts from O again, and the pulse signal becomes 1.
Start number. Such operations are repeated, and the windshield wiper is operated intermittently fj'l in a constant cycle.

'Z - In other words, the first O of the above-mentioned highest position Pi [・ll is read out, and the period between the paralysis from 1 to the first (21 is 7・,) and 1 is one revolution! With S1. On the other hand, if the vehicle speed changes, -
41a) The storage area changes, and the operation of the driver is controlled, and the window wiper's irb changes.
The vehicle speed is 0 when Sakumonyo is 0 (for example, data 1 read from RO1v12 in the 3rd L"l) c 1JffiI i!1
(Reference 1.-(Then) The operation interval of the windshield wiper is adjusted to the optimum side 911 according to the cycle force change 4F, i, %n.

By the way, running speed 1: How long does it take for the windshield wiper to hit the stomach? It is necessary to shorten the I! when driving at high speeds above a certain level. Since the water droplets are blown and flushed at a pressure of 1, there is no need to compare the time of embedding 1 and 1 to know the operation interval of the windshield wiper. That is, 5JA
As shown in FIG. 4, the number of times the wheel is driven per predetermined time increases non-linearly as the vehicle speed increases. Above) In the small actual m11 row (l'1. according to the vehicle speed, f dwarf, ipa v) work) gamma (l), the tel that can be set as a factor, what kind of non-linear changes. On the other hand, you can perform a beautiful five-stroke.

FIG. 5 is a schematic block diagram showing another embodiment of the invention. In each of FIGS. 5A and 5B, parts similar to those in the embodiment shown in FIG. 1 are given the same reference numerals. , in Figure (C), the 1st speed signal detected by the vehicle speed sensor 7 is △
, /[) is applied to the converter 1, converted into digital signal vehicle speed data, and sent to TR0M20 L3. This ROM 201J is also given the output from the counter 4. Furthermore, in ROM20 (j1 download (2 n I)
A sensing signal from t8 is provided. This rainfall sensor 8
is a sensor that detects whether there is a large amount of rainfall, and is a sensor that uses, for example, a millimeter wave radar. In other words, the millimeter-wave raster uses the fact that the spectrum of the received fiN signal widens due to the interference from raindrops.
Droplet detection is possible. Further, an optical water droplet sensor V or a semiconductor water droplet sensor may be used in place of the millimeter wave radar.The ROM 20 has two storage areas as shown in Figure 2;
Including Sada. So, rain rain! In response to the detection signal from I8, one of the 10 regions and 1 field of the 2fli class is selected. In addition, optimal control can be performed depending on the amount of rainfall.

Here, the data area 1 of R(') tvl 2 shown in FIG. 1 was constructed so as to use the least significant bit Do. However, in addition to this example, R
O~・120 is from Do, and all of the eight bits 1~ are used. Therefore, the data is fixed in each bit; '!' in Figure 1. 2 (same as j (just A 'D knee; 1-way data from inverter 1 and h from counter 4
The address of J-)'1ROtvl 20 is specified in the 1 number output. Then, by specifying this address, the ROM
The data read from 20 is applied to the 8-pit all data toggle multiplexer 9 of Do-D7. This multiplayer 9 has data if ill! l! ? The selection command data of 3 pins from path 10 is received in the selection circuit 10t, which is composed of three 2'1' circuits, three resistors, and a power supply, and turns A/OFF of three switches. A predetermined selection 111 order data is provided to the multiplexer 9 by combining the above. In the multi-plexer 9, the 8 hit 1 data from the ROM 20 is selected according to the selection command data from the selection circuit 10.
- Any one bit of data Dt+ to D7 is given to the controller 5 and the counter 4. Therefore, in this embodiment, the selection circuit 10 is
By operating the switch in , stomach data 'Q+
You can control the inter-question interval of the Indian Twipa. Therefore, compared to the embodiment shown in FIG. 1, the operation interval of the windshield wiper can be controlled more precisely.

In addition to the effects of the invention, according to this defense, data related to the operating interval of the windshield wiper for each medium V is preset using a non-volatile memory, and this set data is Since the vehicle speed data can be selectively and cyclically outputted from the counting output from the digital output, the configuration is simplified compared to the conventional control system made of DisnoArchit parts. , also using a micro]nbifuta
N+ control device 1. 1. A control system made up of discrete parts? It is now possible to perform complex control that was difficult to perform, and to deal with the non-linear relationship between vehicle speed and wiper suspension.'', 19f.
+l! You can use 1 tl loading gate.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram showing an embodiment of the present invention. Figure 2 shows the description of ROM 2 shown in Figure 1 ↑0 area 112
1r is an illustrative diagram showing. Fig. 3 is a diagram showing the cycle of data D1. read from R (monthly σ2) shown in Fig. 1 by vehicle speed. Fig. 5 is a block diagram showing another TP example of the present invention. In the figure, 1 is an A/D converter, 2υ and 20 are R
OM, 3 is an oscillator, 4 is a counter, 5 is a controller,
6 is a wiper], 7 is a vehicle speed sensor, 8 is a rain sensor, 9 is a multiplex sensor, and 10 is a selection circuit. Special W1 Applicant Taihatsu J Gyo Co., Ltd. Figure 3 Figure 4 Kenren - Figure 2 〆

Claims (2)

[Claims] (1) A wiper control device that controls the operation interval of windows and rivets in an automobile according to the traveling speed (support) of the automobile, comprising: an oscillator that outputs a reference frequency signal, a counter that counts the reference frequency signal, and the automobile. a vehicle speed data output means for outputting data (vehicle speed data) regarding the traveling speed of the vehicle; and a plurality of storage areas addressed by the vehicle speed data, each storage area containing data regarding the operation interval of the windshield wiper according to the vehicle speed. Driving the windshield wiper based on a non-volatile memory stored in a readable manner according to the counting output of the counter, and data relating to the working 1γ interval of one windshield wiper read from the non-volatile memory. A wiper control device comprising means. (2) Each storage area of the nonvolatile memory stores a plurality of types of data regarding the operation interval of the window wiper, and selects which data from among the several types of data is to be given to the window wiper driving means. The wiper control l according to claim 1, comprising data selection means for
l device. (3) The wiper I!iIJ control device according to claim 2, wherein the data selection means is configured to be selectable by manual operation.