JP2014046882A - Wiper control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper control device whose memory capacity is prevented from expanding.SOLUTION: The wiper control device comprises: a sensors group (10) for detecting a plurality of different physical quantities; and a control section (20) for controlling based on the output signals from the sensors group the wiping speed of a wiper mounted to a vehicle. The control section has: a memory section (21)in which the function of the wiping speed having the plurality of different physical quantities as variables stored; and an arithmetic operation section (22) for arithmetically operating the wiping speed by assigning the output signals of the sensors group to the variables for the function.

Description

  The present invention relates to a wiper control device having a sensor group that detects a plurality of different physical quantities and a control unit that controls a wiping speed of a wiper provided in a vehicle based on an output signal of the sensor group. .

  2. Description of the Related Art Conventionally, as shown in Patent Document 1, for example, a vehicle wiper control device has been proposed that has different wiper operating speeds and rainfall-related curves for each vehicle speed. This vehicle wiper control device determines the wiper operating speed by shifting to a curve corresponding to the vehicle speed as the vehicle speed changes.

JP-A-6-171469

  As described above, the vehicle wiper control device disclosed in Patent Document 1 has a plurality of curves. Therefore, there is a problem that the memory capacity for storing this curve increases.

  In view of the above problems, an object of the present invention is to provide a wiper control device in which an increase in memory capacity is suppressed.

  In order to achieve the above object, the present invention provides a sensor group (10) for detecting a plurality of different physical quantities and a control for controlling the wiping speed of a wiper provided in the vehicle based on an output signal of the sensor group. A wiper control device having a unit (20), wherein the control unit includes a storage unit (21) in which a function of a wiping speed having a plurality of different physical quantities as variables is stored, and a group of sensors as a function variable. It has the calculating part (22) which calculates a wiping speed by substituting the output signal of.

  Thus, according to the present invention, one wiping speed function with a plurality of different physical quantities as variables is stored in the storage unit (21). Therefore, an increase in memory capacity is suppressed compared to a configuration in which a plurality of wiping speed functions (curves) having one physical quantity as a variable are stored in the storage unit.

  Incidentally, when the sensor group (10) detects two different physical quantities, the curved surface MAP related to the wiping speed is stored in the storage unit (21). The curved surface MAP is different from the curved surface MAP formed by discretely arranging a plurality of curves in the axial direction of a certain variable, and has continuous values for all variables. Therefore, the wiping speed can be determined more finely as compared with the comparative configuration described above.

  In the present invention, it is preferable that the calculation unit change the coefficient of the function in accordance with the preference of the user who gets on the vehicle. According to this, since there are few coefficients compared with the structure which changes the coefficient of a some curve (function), the update of the function according to a user preference becomes easy. Note that the user's preference is the tendency of the user's preference for wiping speed at a certain physical quantity. The calculation unit changes the coefficient of the function based on the adjustment amount by the user's operation of the controller (30) for adjusting the wiper wiping speed and the physical amount detected by the sensor group at the time of adjustment of the controller.

  Incidentally, the sensor group detects the rainfall and the vehicle speed as physical quantities. In this case, the storage unit (21) stores a function of the wiping speed (curved surface MAP) using the rainfall amount and the vehicle speed as variables. The sensor group may detect, as a physical quantity, at least one of the amount of solar radiation, the outside air temperature, the glass temperature, the time, and the brightness of the light provided in the vehicle, in addition to the rainfall amount and the vehicle speed. good. In this case, the storage unit (21) stores a function of the wiping speed using at least one of the above-described physical quantities as a variable in addition to the rainfall amount and the vehicle speed.

It is a block diagram showing a schematic structure of a wiper control device concerning a 1st embodiment. It is an image figure which shows a wiping function. It is a flowchart which shows the update of a wiping function, and calculation of the wiping speed. It is a block diagram which shows the modification of a wiper control apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
A wiper control device according to the present embodiment will be described with reference to FIGS. In addition to the wiper control device, FIG. 1 shows a controller 30 and a motor 40 attached to the vehicle.

  As shown in FIG. 1, the wiper control device 100 includes a sensor group 10 and a control unit 20 as main parts. The sensor group 10 detects a plurality of different physical quantities, and the control unit 20 controls a motor 40 of a wiper (not shown) based on the output signal of the sensor group 10. The control unit 20 according to the present embodiment also has a learning function of changing the current supplied to the motor 40 (wiping speed of the wiper) according to the operation of the controller 30 of the user who gets on the vehicle, that is, the user's preference.

  The sensor group 10 includes a rainfall amount detection unit 11 and a vehicle speed detection unit 12. Therefore, the sensor group 10 detects the rainfall per unit time and the vehicle speed as physical quantities. These physical quantities are output to the control unit 20 as output signals of the detection units 11 and 12.

  The control unit 20 includes a storage unit 21 in which a wiping speed function (hereinafter, referred to as a wiping function) using a plurality of physical quantities detected by the sensor group 10 as a variable, and a variable of the wiping function as a sensor group 10. And a calculation unit 22 for calculating the wiping speed by substituting the physical quantity detected in step (b). As described above, the sensor group 10 includes the rainfall amount detection unit 11 and the vehicle speed detection unit 12. Therefore, the storage unit 21 stores a wiping function (curved surface MAP shown in FIG. 2) having the rainfall amount and the vehicle speed as variables. The calculation unit 22 reads the wiping function from the storage unit 21, and then calculates the wiping speed by substituting the rainfall amount and the vehicle speed detected by the detection units 11 and 12 into the variable of the wiping function.

ここで、ｆは、払拭速度を示し、ｐは、変数を示している。 Incidentally, when the sensor group 10 detects m different physical quantities, the wiping function is expressed as follows.

Here, f indicates the wiping speed, and p indicates a variable.

ここで、ａ_ｉｊは、払拭関数に含まれる係数であり、後述するように、ユーザーの嗜好に合わせて、調整される。 More specifically, the wiping function is expressed as follows.

Here, a _ij is a coefficient included in the wiping function, and is adjusted according to the user's preference as described later.

この関数を具体的に表すと、下記のように表される。

Wiping function according to the present embodiment, variable p ₁ about rainfall, the p ₂ variables relating to the vehicle speed, when n = 3, are expressed as follows.

This function is specifically expressed as follows.

When this function is expanded, it is expressed as follows.

この係数ｃ_１〜ｃ_１６が、ユーザーの嗜好によって、変更される。なお、もちろんではあるが、係数ｃ_１〜ｃ_１６の全てを変更する必要はなく、最低、１つの係数ｃが変更されれば、払拭関数は更新されることとなる。ちなみに、払拭関数ｆが３次式で表される場合、係数ｃ_８、ｃ_１１〜ｃ_１２，ｃ_１４〜ｃ_１６はゼロとなる。 In Equation 2, the wiping function is simply expressed, but is stored in the storage unit 21 in the form of Equation 5. In Equation 5, the coefficient is represented by multiplication of two a, and the multiplication of the two a is stored in the storage unit 21 as one coefficient c. Using c, Equation 5 is expressed as follows.

The coefficients c _{1 to} c ₁₆ are changed according to the user's preference. Of course, it is not necessary to change all of the coefficients c _{1 to} c ₁₆ , and at least if one coefficient c is changed, the wiping function is updated. Incidentally, when the wiping function f is expressed by a cubic expression, the coefficients c ₈ , c _{11 to} c ₁₂ , and c _{14 to} c ₁₆ are zero.

  The controller 30 is for adjusting the wiping speed of a wiper by a user's operation. The controller 30 is electrically connected to the control unit 20, and the control unit 20 adjusts the wiper wiping speed according to the adjustment amount of the controller 30. Further, the control unit 20 adjusts the wiper wiping speed, and learns the user's preference based on the adjustment of the controller 30 and the output signal of the sensor group 10. Then, the learning content is reflected in the wiping function by updating the coefficient included in the wiping function.

  The motor 40 is for driving the wiper, and is driven and controlled by the control unit 20. The control unit 20 adjusts the motor 40 step by step, and the adjustment amount of the wiper wiping speed between the first step and the first step is a fine adjustment amount that the user cannot perceive. As described above, the control unit 20 adjusts the wiper in a stepless manner.

  Next, the update of the wiping function and the calculation of the wiping speed will be described with reference to FIG. First, in step S10, the control unit 20 determines whether or not the controller 30 has been operated by the user. When determining that the controller 30 has been operated, the control unit 20 stores the adjustment amount and proceeds to step S20. When determining that the controller 30 has not been operated, the control unit 20 proceeds to step S50.

  If transfering it to step S20, the control part 20 will acquire the rainfall and vehicle speed (vehicle speed) detected in the sensor group 10, and will transfer to step S30.

  If transfering to step S30, the control part 20 will update the coefficient of a wiping function based on the adjustment amount of the controller 30 memorize | stored in step S10, the rainfall amount and vehicle speed (vehicle speed) which were acquired in step S20. . By doing so, the wiping function is updated to the user's preference. The user's preference (preference) is a tendency of how much the user prefers wiping speed at a certain rainfall and vehicle speed.

  When the process proceeds from step S30 to step S40, the control unit 20 calculates the wiping speed by substituting the rainfall amount and the vehicle speed acquired in step S20 into the updated wiping function, and then the calculated wiping speed is obtained. The motor 40 is controlled.

  Next, step S50 will be described. If transfering it to step S50, the control part 20 will acquire the rainfall amount and vehicle speed which were detected in the sensor group 10, and will transfer to step S60.

  If transfering to step S60, the control part 20 will read a wiping function from the memory | storage part 21, and will substitute the rainfall amount and vehicle speed which were acquired in step S20 to the read wiping function. In this way, the wiping speed is calculated, and the process proceeds to step S40.

  If it transfers to step S40 from step S60, the control part 20 will control the motor 40 so that it may become the wiping speed calculated in step S40.

  Next, the effect of the wiper control device 100 according to the present embodiment will be described. As described above, the storage unit 21 stores one wiping function (curved surface MAP shown in FIG. 2) having the rainfall amount and the vehicle speed as variables. Therefore, an increase in memory capacity is suppressed as compared with a configuration in which a plurality of wiping functions (curves) having rainfall as a variable are stored in the storage unit.

  As described above, the storage unit 21 stores the curved surface MAP related to the wiping speed. Unlike the curved surface MAP configured by discretely arranging a plurality of wiping functions (curves) having a rainfall amount as a variable in the axial direction of the vehicle speed, the curved surface MAP has continuous values for all variables. Therefore, the wiping speed can be determined more finely as compared with the comparative configuration described above.

  In this embodiment, the control unit 20 adjusts the motor 40 step by step. The adjustment amount of the wiper wiping speed between the first step and the first step is an adjustment amount that is so fine that the user cannot perceive it. To do. According to this, the wiping speed of the wiper can be controlled so as to reflect the wiping speed calculated by the wiping function in which all variables are continuous values.

  The coefficient of the wiping function is changed in accordance with the preference of the control unit 20 and the user who gets on the vehicle. According to this, since there are few coefficients compared with the structure which changes the coefficient of a several wiping function (curve), the update of the wiping function according to a user preference becomes easy.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In this embodiment, the sensor group 10 has the rainfall amount detection part 11 and the vehicle speed detection part 12, and showed the example which detects a rainfall amount and a vehicle speed as a physical quantity. However, the sensor group 10 may include a detection unit that detects at least one of the amount of solar radiation, the outside air temperature, the glass temperature, the time, and the brightness of the light provided in the vehicle as a physical quantity. In this case, the storage unit 21 stores a wiping speed function using at least one of the above-described physical quantities as a variable in addition to the rainfall amount and the vehicle speed. As an example, FIG. 4 illustrates a wiper control device 100 when the sensor group 10 includes a solar radiation amount detection unit 13.

  Of course, in addition to the above-described physical quantities, if the physical quantity is useful for controlling the wiping speed of the wiper, the sensor group 10 has a detection unit for detecting the useful physical quantity. A configuration in which the variable is included in the wiping function can be adopted. The numerous physical quantities described above are merely examples.

DESCRIPTION OF SYMBOLS 10 ... Sensor group 20 ... Control part 21 ... Memory | storage part 22 ... Calculation part 100 ... Wiper control apparatus

Claims (7)

A sensor group (10) for detecting a plurality of different physical quantities;
A control unit (20) for controlling a wiping speed of a wiper provided in a vehicle based on an output signal of the sensor group, and a wiper control device comprising:
The control unit has a storage unit (21) in which a function of the wiping speed is stored with a plurality of different physical quantities as variables, and the output signal of the sensor group is substituted into the variable of the function. A wiper control device comprising: a calculation unit (22) for calculating a speed.   The wiper control device according to claim 1, wherein the calculation unit changes a coefficient of the function in accordance with a preference of a user who gets on the vehicle.   The calculation unit changes the coefficient of the function based on an adjustment amount by a user operation of the controller (30) that adjusts the wiper wiping speed and a physical quantity detected by a sensor group at the time of adjustment of the controller. The wiper control device according to claim 2.   The wiper control device according to claim 1, wherein the sensor group detects a rainfall amount and a vehicle speed as the physical quantity.   The sensor group detects, as the physical quantity, at least one of the amount of solar radiation, the outside air temperature, the glass temperature, the time, and the brightness of a light provided in the vehicle, in addition to the rainfall amount and the vehicle speed. The wiper control device according to claim 4.   The wiper control device according to claim 4 or 5, wherein the sensor group includes a rainfall amount detection unit (11) and a vehicle speed detection unit (12).   The wiper control device according to any one of claims 1 to 6, wherein the control unit controls the wiping speed by controlling a motor (40) that drives the wiper.

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