JP2009078588A - Wiper device control method and wiper control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mitigate communication load; to improve control accuracy; to reduce system cost by slimming communication data transmitted/received between control units of a motor. <P>SOLUTION: A wiper device 1 is equipped with wiper blades 2a, 2b respectively driven by motors 3a, 3b, and the motors 3a, 3b are respectively controlled by control microcomputers 5a, 5b. The control microcomputers 5a, 5b synchronously controls the motors 3a, 3b while exchanging control information of blade positions, etc., via a communication line 7. The control information, comprising Data 1 of arm position data low 8 bits, Data 2 including arm position data high 1 bit and wiper operation mode 6 bits, Data 3 including motor control sequence 6 bits, and Data 4 of check sum, bi-directionally reduces the communication data to 8 bytes. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a data communication technique of a motor used as a drive source of a vehicle wiper device, and more particularly, to a wiper device that drives two wiper arms with separate motors, such as a counter-wiping type wiper device. And effective technology.

  In recent years, a wiper system for a vehicle such as an automobile, especially a wiper system of an opposite wiping type (opposite type), has adopted a method in which each wiper arm on the driver's seat side and on the passenger seat side is individually motor-driven as in Patent Document 1. ing. In such a wiper system, the left and right wiper blades (hereinafter abbreviated as appropriate) are controlled individually by the left and right controllers while monitoring the position and speed of each wiper arm so that they do not interfere on the wiping surface. is doing. In this case, the speed of each arm is calculated based on this angle data by detecting the motor rotation angle by an angle sensor such as an MR sensor arranged in the motor unit. The left and right controllers exchange speed data and position data while communicating with each other, synchronously control the motors, and control the left and right motors so that a predetermined target angle difference between the blades is set.

  FIG. 7 is an explanatory diagram showing a configuration of communication data in such a wiper system. As shown in FIG. 7, in a wiper system in which a motor is synchronously controlled by two controllers, between a driver side (hereinafter abbreviated as DR side) and a passenger seat side (hereinafter abbreviated as AS side) controller. The angle data indicating the arm position, the control state of the motor, and the like are exchanged by signals of 5 bytes (8 bits each). In this case, in the signal from the DR side to the AS side, the angle data of the DR side arm is stored in the first byte and the second byte, and the motor sequence (control mode such as the rotation direction and controller output) is stored in the third byte. ing. The fourth byte stores the speed of the DR motor and the wiper switch state (ON, OFF; HI, Lo, INT), and the fifth byte is a checksum of the data up to that point.

In the signal from the DR side to the AS side, the angle data of the AS side arm is stored in the first byte and the second byte, the motor sequence is stored in the third byte, and the speed of the AS side motor is stored in the fourth byte. The fifth byte is a checksum.
Japanese Patent Laid-Open No. 11-301417 Special table 2004-521004 gazette

  However, in such a wiper system, when the left and right are synchronized by communicating each other's angle data, speed data, etc., as described above, for example, 10-round data communication is required and exchanged between the motors. The number of data to be increased. When the amount of communication data increases, the control load of the controller increases accordingly, and there is a risk that transmission / reception of control data may be delayed, and there is a problem that a delay occurs in motor lock determination. Further, when the communication speed (bps) is increased to cover such a delay, the noise resistance performance is lowered, and when the control cycle is lengthened, the control accuracy is lowered. Furthermore, in order to solve such a problem, if a microcomputer having a higher processing capacity is introduced, there arises a problem that the system cost increases.

  An object of the present invention is to reduce communication load, improve control accuracy, and reduce system cost by reducing communication data transmitted and received between control units of a motor.

  The wiper device control method of the present invention is connected to a first motor driven and controlled by a first control circuit, a first wiper blade driven by the first motor, and the first control circuit via a communication line. A second motor driven and controlled by the second control circuit, and a second wiper blade driven by the second motor, and the communication between the first control circuit and the second control circuit. A wiper device control method for performing drive control of the first and second motors while transmitting / receiving control information via a line, wherein the control information includes position information of the first or second wiper blade, and the first wiper blade It has control data storing the operation mode of the first or second wiper blade within 1 byte.

  In the present invention, by storing the wiper blade position information and operation mode within 1 byte, the amount of communication data between the control circuits is reduced and the communication load is reduced. For this reason, it is possible to cope with a control cycle that is faster than the conventional one, and it is possible to improve the control accuracy such as finer wiper drive control. In addition, a general-purpose microcomputer with low A / D resolution can be adopted, and the system cost can be reduced.

  In the wiper apparatus control method, the control information includes first data including position information of the first or second wiper blade, position information of the first or second wiper blade, and the first or second wiper blade. It is good also as a structure which has 2nd data containing these operation modes. The control information may further include third data including a control sequence of the first or second motor.

  The wiper control device of the present invention is a control device for a wiper device comprising a first wiper blade driven by a first motor and a second wiper blade driven by a second motor, wherein the first motor And a second control circuit connected to the first control circuit via a communication line and controlling the driving of the second motor. The first control circuit includes: A first data buffer unit for storing control data in which position information of one wiper blade and an operation mode of the first wiper blade are stored within 1 byte; and control data in the first data buffer unit are sent to the second control circuit A first transmission buffer unit for transmitting, and the second control circuit stores the positional information of the second wiper blade and the operation mode of the second wiper blade within 1 byte. And having a second data buffer portion for storing control data, and a second transmission buffer unit to transmit control data in said second data buffer unit to the second control circuit.

  In the present invention, a data buffer unit that stores control data in which the position information and the operation mode of the wiper blade are stored within 1 byte are transmitted to each control circuit, and the control data in the data buffer unit is transmitted to the other control circuit. By providing the transmission buffer unit, the communication data amount between the control circuits is reduced, and the communication load is reduced. For this reason, it is possible to cope with a control cycle that is faster than the conventional one, and it is possible to improve the control accuracy such as finer wiper drive control. In addition, a general-purpose microcomputer with low A / D resolution can be adopted, and the system cost can be reduced.

  According to the wiper device control method of the present invention, the first motor driven and controlled by the first control circuit, the first wiper blade driven by the first motor, and the first control circuit are connected via the communication line. A second motor that is driven and controlled by the second control circuit, and a second wiper blade that is driven by the second motor, and a communication line is provided between the first control circuit and the second control circuit. In the wiper apparatus control method for controlling the driving of the first and second motors while transmitting / receiving the control information, the position information of the first or second wiper blade and the operation of the first or second wiper blade are used as the control information. Since the control data storing the mode within 1 byte is used, the communication data amount between the control circuits can be reduced as compared with the conventional control method. For this reason, the communication load between the control circuits can be reduced, and it becomes possible to cope with a control cycle faster than the conventional one. Therefore, finer wiper drive control is possible, and control accuracy can be improved. In addition, a general-purpose microcomputer can be adopted for the control system, and the cost of the wiper system can be reduced.

  According to the wiper control device of the present invention, a wiper device control device comprising a first wiper blade driven by a first motor and a second wiper blade driven by a second motor, A first control circuit that controls the drive of the motor and a second control circuit that is connected to the first control circuit via a communication line and controls the drive of the second motor are provided, and the first control circuit includes a first wiper blade. A first data buffer unit that accommodates control data in which position information and the operation mode of the first wiper blade are stored within 1 byte, and a first transmission buffer unit that transmits control data in the first data buffer unit to the second control circuit The second data buffer unit for storing the control data in which the position information of the second wiper blade and the operation mode of the second wiper blade are stored within 1 byte in the second control circuit Since the second transmission buffer unit for transmitting the control data in the second data buffer unit to the second control circuit is provided, it is possible to reduce the communication data amount between the control circuits as compared with the conventional control device. It becomes. For this reason, the communication load between the control circuits can be reduced, and it becomes possible to cope with a control cycle faster than the conventional one. Therefore, finer wiper drive control is possible, and control accuracy can be improved. In addition, a general-purpose microcomputer can be adopted for the control system, and the cost of the wiper system can be reduced.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory diagram showing a system configuration of a wiper apparatus according to an embodiment of the present invention, to which a control method according to the present invention is applied. The wiper device 1 in FIG. 1 is a so-called counter-wiping type wiper device in which DR-side and AS-side wiper blades 2a (first wiper blades) and 2b (second wiper blades) are arranged to face each other. A DR side motor (first motor) 3a and an AS side motor (second motor) 3b (hereinafter abbreviated as motors 3a and 3b) are separately provided on the DR side and the AS side, respectively. Note that “a, b” in the reference numerals indicates members and portions related to the DR side and the AS side, respectively.

  A blade rubber member (not shown) is attached to the blades 2a and 2b. The rubber member is brought into close contact with the windshield of the vehicle and moved to be present in the wiping areas 11a and 11b indicated by broken lines in FIG. Water droplets to be wiped away. The blades 2a and 2b are supported by wiper arms 13a and 13b fixed to the distal ends of the wiper shafts 12a and 12b, and perform swinging motions left and right by drive systems 14a and 14b using the motors 3a and 3b as drive sources. . The drive systems 14a and 14b are composed of motors 3a and 3b and a link mechanism including crank arms 15a and 15b, connecting rods 16a and 16b, drive levers 17a and 17b, and wiper arms 13a and 13b.

  Driving levers 17a and 17b are further attached to the wiper shafts 12a and 12b to which the wiper arms 13a and 13b are fixed. Connecting rods 16a and 16b are attached to the end portions of the drive levers 17a and 17b. The other ends of the connecting rods 16a and 16b are connected to the tip portions of the crank arms 15a and 15b. The crank arms 15a and 15b are fixed to output shafts (worm shafts) 18a and 18b provided in the speed reduction mechanisms of the motors 3a and 3b. When the motors 3a, 3b are driven and the output shafts 18a, 18b rotate, the crank arms 15a, 15b rotate, and this movement is transmitted to the drive levers 17a, 17b via the connecting rods 16a, 16b. Thereby, the rotational motion of the motors 3a and 3b is converted into the swing motion of the wiper arms 13a and 13b, and the blades 2a and 2b reciprocate between the upside down positions.

  The motors 3a and 3b are accommodated in the motor units 4a and 4b. In the motor units 4a and 4b, an MR sensor (see FIG. 2) 22a (the first sensor) is used as a sensor for detecting the position and speed of the wiper arms 13a and 13b. 1 angle detecting means) and 22b (second angle detecting means) are provided. The MR sensors 22a and 22b are arranged in the vicinity of the output shafts 18a and 18b of the speed reduction mechanism. The magnets 21a and 21b (see FIG. 2) are arranged on the output shafts 18a and 18b so as to face the MR sensors 22a and 22b. ) Is attached. The MR sensors 22a and 22b change the output voltage as the output shafts 18a and 18b rotate, and are set so that the output voltage value becomes maximum when the wiper arms 13a and 13b come to the lower inversion position, for example. . Accordingly, by looking at changes in the output voltage from the MR sensors 22a and 22b, the rotation angles of the output shafts 18a and 18b can be detected, and the current positions of the wiper arms 13a and 13b can be grasped.

  The motor units 4a and 4b further include control microcomputers 5a (first control circuit) and 5b (second control circuit) that calculate position information and speed information of the wiper arms 13a and 13b based on outputs of the MR sensors 22a and 22b. Is provided. The DR-side motor unit 4a is connected to an ECU 6 that is a vehicle-side control device. From the ECU 6 to the motor unit 4a, ON / OFF of the wiper switch, switch information such as LO, HI, INT, vehicle speed information, and the like are input. The motor units 4a and 4b are connected to each other via a communication line 7. The motor 3a connected to the ECU 6 is on the master side, and the motor 3b connected to the motor 3a on the communication line 7 is on the slave side. Both motors are controlled.

  The control microcomputers 5a and 5b of both units 4a and 4b acquire the blade position information of the other party via the communication line 7. Both microcomputers 5a and 5b synchronize the motors 3a and 3b based on the positional relationship and moving speed of both arms while exchanging position data (angle data) and speed data of the wiper arms 13a and 13b via the communication line 7. To drive. That is, the control microcomputers 5a and 5b control the motors 3a and 3b in forward and reverse directions based on their own data while referring to the arm position and speed of the other party, and the blades interfere with each other or the angle difference increases. The wiper device 1 is appropriately controlled so as not to be lost.

  FIG. 2 is an explanatory diagram illustrating the configuration of the control device of the wiper device 1 that employs such a control mode. The control microcomputers 5a and 5b grasp the position data and speed data of the blades 2a and 2b (= wiper arms 13a and 13b) at a predetermined control cycle (for example, 2 ms) by the control system as shown in FIG. Such motor control is performed. As shown in FIG. 2, when the magnets 21a and 21b attached to the output shafts 18a and 18b rotate with the rotation of the motors 3a and 3b, voltage signals corresponding to the magnetic field changes are output from the MR sensors 22a and 22b. The Output signals from the MR sensors 22a and 22b are input to the control microcomputers 5a and 5b via the amplifier circuits 23a and 23b, and converted into digital signals (AD values) by the A / D converters 24a and 24b.

  The AD values created by the A / D conversion units 24a and 24b are sent to the angle calculation processing units 25a and 25b, and the rotation angles of the output shafts 18a and 18b are calculated. There is a predetermined relationship between the MR sensor output value and the output shaft rotation angle, and the angle calculation processing units 25a and 25b calculate the rotation angles of the output shafts 18a and 18b from the AD values based on a preset relationship. To do. The AD value is also sent to the speed calculation processing units 26a and 26b, and the rotation speed of the output shafts 18a and 18b is calculated based on the change of the AD value, that is, the rotation angle and control cycle of the output shafts 18a and 18b. .

  The rotational speeds of the output shafts 18a and 18b and the rotational speeds of the motors 3a and 3b have a certain correlation based on the speed reduction ratio of the speed reduction mechanism. Therefore, the rotational speeds of the motors 3a and 3b can be grasped by obtaining the rotational speeds of the output shafts 18a and 18b. On the other hand, the rotational speed of the output shafts 18a and 18b and the moving speed of the wiper arms 13a and 13b also have a certain correlation based on the link ratio or the like. Therefore, the moving speed of the wiper arms 13a and 13b can be grasped by obtaining the rotational speed of the output shafts 18a and 18b. In the wiper device 1, the rotational speeds of the output shafts 18 a and 18 b are detected using the AD values obtained from the outputs of the MR sensors 22 a and 22 b, thereby grasping the moving speeds of the wiper arms 13 a and 13 b.

  The position data and speed data of the wiper arms 13a and 13b thus calculated are transmitted to the counterpart control microcomputer via the data transmitting / receiving units 27a and 27b. The control microcomputer 5a is also connected to the in-vehicle network via the data transmission / reception unit 27a, and the state of the wiper switch (the distinction between ON, OFF, HI, LO, and INT modes) is input via the control microcomputer 5a. . Such a wiper switch state is also communicated between the control microcomputers 5a and 5b. Both control microcomputers 5a and 5b control the operation of the respective motors 3a and 3b in accordance with the wiper switch state based on the wiper arm data on the own side and the data of the other party's wiper arm obtained through communication.

  FIG. 3 is an explanatory diagram showing the configuration of the data transmitter / receivers 27a and 27b. Although FIG. 3 shows data transmission from the DR side to the AS side, data transmission from the AS side to the DR side is also executed in the same manner. As shown in FIG. 3, in the data transmission / reception units 27a and 27b, a transmission data buffer (first data buffer unit) 31a for storing control information including a wiper switch state, wiper arm position / velocity data, and the like is provided. ing. The transmission data buffer 31a is composed of a plurality (four in this case) of data buffers (1 to 4) according to the number of bytes of transmission data, and each data buffer stores data one byte at a time. . The data stored in the transmission data buffer 31a is sequentially sent from the data buffer 1 to the transmission buffer (first transmission buffer unit) 32a, and then sent to the control microcomputer 5b via the communication line 7.

  On the other hand, the control microcomputer 5b is provided with a reception buffer 33b for receiving transmission data from the control microcomputer 5a. The reception buffer 33b is connected to a reception data buffer 34b composed of a plurality (four in this case) of data buffers (1 to 4), and the data stored in the reception buffer 33b is information of the data buffer 1. Are sequentially sent to the reception data buffer 34b. The control microcomputer 5b grasps the wiper switch state and the condition of the wiper arm 13a on the DR side from this data, and controls the drive of the motor 3b together with the data of the wiper arm 13b.

  The data transmission / reception units 27a and 27b are provided with a reception buffer (not shown) for data transmission from the AS side to the DR side. That is, the data transmission / reception unit 27a is provided with a reception buffer and a reception data buffer, and the data transmission / reception unit 27b is also provided with a transmission data buffer (second data buffer unit) and a transmission buffer (second transmission buffer unit). , Used for transmission / reception of various control information between AS and DR.

  FIG. 4 is a flowchart showing the processing procedure of the control method according to the present invention performed by the data transmitting / receiving units 27a and 27b having such a configuration, and shows the procedure of data transmission processing from the DR side to the AS side. . The data transmission process from the AS side to the DR side is also executed in the same procedure. The process of FIG. 4 is executed for each control cycle, and is executed after grasping that the previous motor control process has been completed in step S1. After the control output process for the motor is completed, the process proceeds to step S2, and data to be transmitted (transmission data) is set to the counterpart microcomputer. After setting the transmission data, the transmission counter is set to 1 in step S3 (n = 1), and the data in the data buffer 1 is sent from the transmission data buffer 31a to the transmission buffer 32a (step S4). When the data in the data buffer 1 is stored in the transmission buffer 32a, the process proceeds to step S5, data transmission is started, and it is confirmed in step S6 whether the transmission process is completed.

  When it is confirmed in step S6 that the data transmission process of the data buffer 1 is completed, the process proceeds to step S7, where the transmission counter is incremented by 1 (n = n + 1), and the counter value updated in step S8 is 5. It is determined whether or not the value has been exceeded. Here, since n = 2, the process returns to step S4, and the data in the data buffer 2 is sent from the transmission data buffer 31a to the transmission buffer 32a. As described above, the data buffers 1 to 4 are provided, and when the data in the data buffer 4 is transmitted, n = 5. That is, when n = 5, all data transmission is completed, the process proceeds from step S8 to step S9, the transmission process is terminated, and the routine is exited.

  FIG. 5 is a flowchart showing the procedure of the transmission data setting process (subroutine) in step S2 of FIG. In the process of FIG. 5, first, in step S11, sampling of data to be transmitted, that is, acquisition of a current AD value on the DR side is performed. After sampling the transmission data in step S11, the process proceeds to step S12, where the lower part of the position data of the wiper arm 13a is stored in the data buffer 1 to create the first data (Data 1 in FIG. 6). In this case, the position data is 9-bit data, and the lower 8 bits are stored in the data buffer 1. Next, proceeding to step S13, the upper position (the remaining 1 bit) of the position data of the wiper arm 13a is stored in the data buffer 2.

  6A and 6B are explanatory diagrams showing the configuration of transmission data in the wiper system, where FIG. 6A shows communication data from the DR side to the AS side, and FIG. 6B shows communication data from the AS side to the DR side. Yes. As shown in FIG. 6, the data buffers 1 and 2 each have an 8-bit configuration, and the data that can be transmitted there is a total of 16 bits. On the other hand, the position data of the wiper arm 13a is actually 9 bits, and when the lower 8 bits are stored in the data buffer 1, the remaining becomes the upper 1 bit. As shown in FIG. There is room for 7 bits. Therefore, in the process according to the present invention, the wiping mode state (wiper switch state, arm speed, etc.) conventionally stored in the data buffer 4 is stored in the margin of the data buffer 2.

  In the wiper system, the wiping mode state is (4 bits: maximum 16 patterns), and a total of 6 bits including a DR side blocking flag 1 bit and a DR side emergency stop flag 1 bit are stored in the data buffer 2. The That is, the 6 bits including the wiping mode state 4 bits are stored in the blank portion of the data buffer 2. Therefore, after storing the upper position data (1 bit) in the data buffer 2 in step S13, the wiping mode state (4 bits) is stored in the remaining area of the data buffer 2 in step S14, and the second data (Data 2 in FIG. 6) is created.

  After storing the wiping mode state, the process proceeds to step S15, where it is determined whether there is an emergency wiper stop condition (motor failure, etc.). If there is an emergency stop condition, 1 is set in bit position 2 (see FIG. 6A) of the data buffer 2 in step S16, and this is displayed. If there is no emergency stop condition, 0 is set in bit position 2 of the data buffer 2 in step S16. After performing these processes, the process proceeds to step S17, and it is determined whether or not the wiper arm 13a is blocked by snow or the like (blocking). If blocking is in progress, 1 is set in bit position 3 of the data buffer 2 in step S19, and this is displayed. At the time of blocking, the wiper arm 13a performs operations such as reversing from the block portion or repeating the block-reversing operation a plurality of times. If it is not blocking, 0 is set in bit position 2 of the data buffer 2 in step S20.

  After determining the emergency stop condition or blocking, the process proceeds to step S21, and motor sequence data (6 bits: maximum 32 patterns) indicating the motor rotation direction, the output state from the control microcomputer, and the like is stored in the data buffer 3. After storing the motor sequence data, the process proceeds to step S22, where the state of the ignition switch is confirmed. If the ignition switch is ON, 1 is set in bit position 7 of the data buffer 3 in step S23, and a message to that effect is displayed. If the ignition switch is not ON (OFF), 0 is set in bit position 7 of the data buffer 3 in step S24.

  After performing these processes, the process proceeds to step S25, and the state of the EEPROM in the control microcomputer 5a is determined. If the EEPROM is abnormal, 1 is set in bit position 4 of the data buffer 3 in step S26, and this is displayed. If the EEPROM is normal, 0 is set in bit position 4 of the data buffer 3 in step S27. As a result, third data (Data 3 in FIG. 6) is created in the data buffer 3.

  After the EEPROM check is completed, the process proceeds to step S28, and checksum data (fourth data: Data4 in FIG. 6) is created. That is, the number of data in the data buffers 1 to 3 is accumulated and the number is stored in the data buffer 4. After storing various data in the data buffers 1 to 4 in this way, the process proceeds to step S29, and the data in the buffer is transmitted to the transmission buffer 32a in order from the data buffer 1, and the routine is exited.

  Thus, in the control method / control apparatus of the present invention, the upper bits of the position data of the wiper arm 13a, the wiping mode state, and the like are stored in the data buffer 2. As described above, in the conventional control mode, the data buffers 1 and 2 are fixed for wiper arm position data. Therefore, the data buffer 2 is actually used for only 1 bit, and accordingly, The amount of data must be large. On the other hand, the control mode according to the present invention flexibly reorganizes the data buffer position (number) conventionally divided according to the data type, and effectively uses the data buffer 2. As a result, the arm position data upper bits and the wiping mode state information can be communicated as 1-byte data, and the number of transmission data can be reduced (5 bytes → 4 bytes).

  Further, in the control method / control apparatus according to the present invention, as shown in FIG. 6B, the data buffer 2 can be effectively used in the transmission data of AS → DR as described above. That is, in AS → DR, the upper 1 bit of the position data of the AS-side wiper arm 13 b and various control information are stored in the data buffer 2. Here, as the control information, information on emergency stop and blocking similar to the case of DR → AS is stored, and the thermal protection state of the motor, the HI mode wiping prohibition on the AS side, the INT mode fixed on the AS side, Stores whether or not reversal is out of the range of the lower reversal S (predetermined area to be wiped) at the time of block detection. As a result, the transmission data number of AS → DR is also reduced from 5 bytes to 4 bytes.

  Therefore, in the wiper device, the number of data exchanged between the control microcomputers 5a and 5b is 8 bytes, and the transmission data is reduced by 2 bytes as a whole (10 bytes → 8 bytes). As a result, the communication load is reduced and a margin is also generated in the control cycle, so that it is possible to cope with a control cycle that is faster than in the past, and finer wiper drive control such as shortening the emergency stop time is possible. In addition, since it is possible to configure the system with a microcomputer having a low A / D resolution, a general-purpose microcomputer can be adopted, system cost can be reduced, and power consumption can be reduced. It is done.

It goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.
For example, in the above-described embodiments, the example in which the present invention is applied to the motor control of the wiper apparatus has been described. However, the present invention can also be applied to the control of a motor used in another apparatus.

It is explanatory drawing which shows the system configuration | structure of the wiper apparatus which is one Example of this invention. It is explanatory drawing which shows the structure of the control system of the wiper apparatus of FIG. It is explanatory drawing which shows the structure of a data transmission / reception part. It is a flowchart which shows the data communication processing procedure performed in a data transmission / reception part. 5 is a flowchart showing a procedure of transmission data setting processing in step S2 of FIG. 2A and 2B are explanatory diagrams illustrating a configuration of transmission data in the wiper apparatus of FIG. 1, in which (a) illustrates communication data from the DR side to the AS side, and (b) illustrates communication data from the AS side to the DR side. It is explanatory drawing which shows the structure of the communication data in the conventional wiper system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wiper apparatus 2a, 2b Wiper blade 3a, 3b Motor 4a, 4b Motor unit 5a, 5b Control microcomputer 6 ECU
7 Communication lines 11a and 11b Wiping areas 12a and 12b Wiper shafts 13a and 13b Wiper arms 14a and 14b Drive systems 15a and 15b Crank arms 16a and 16b Connecting rods 17a and 17b Drive levers 18a and 18b Output shafts 21a and 21b Magnets 22a and 22b MR Sensors 23a, 23b Amplifying circuits 24a, 24b A / D conversion units 25a, 25b Angle calculation processing units 26a, 26b Speed calculation processing units 27a, 27b Data transmission / reception unit 31a Transmission data buffer (first data buffer unit)
32a Transmission buffer (first transmission buffer unit)
33b Receive buffer 34b Receive data buffer

Claims (4)

Drive-controlled by a first motor driven and controlled by a first control circuit, a first wiper blade driven by the first motor, and a second control circuit connected to the first control circuit via a communication line. A second wiper blade driven by the second motor, and transmits / receives control information via the communication line between the first control circuit and the second control circuit. A wiper device control method for controlling the driving of the first and second motors,
The wiper apparatus control method according to claim 1, wherein the control information includes position information of the first or second wiper blade and control data storing an operation mode of the first or second wiper blade within 1 byte.   2. The wiper device control method according to claim 1, wherein the control information includes first data including position information of the first or second wiper blade, position information of the first or second wiper blade, and the first or second wiper blade. And a second data including an operation mode of the second wiper blade.   3. The wiper device control method according to claim 2, wherein the control information further includes third data including a control sequence of the first or second motor. A control device for a wiper device comprising a first wiper blade driven by a first motor and a second wiper blade driven by a second motor,
A first control circuit for driving and controlling the first motor;
A second control circuit connected to the first control circuit via a communication line and drivingly controlling the second motor;
The first control circuit includes a first data buffer unit for storing control data in which position information of the first wiper blade and an operation mode of the first wiper blade are stored within 1 byte, and in the first data buffer unit A first transmission buffer unit for transmitting control data to the second control circuit;
The second control circuit includes a second data buffer unit for storing control data in which the positional information of the second wiper blade and the operation mode of the second wiper blade are stored within 1 byte, and the second data buffer unit And a second transmission buffer unit for transmitting control data to the second control circuit.

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