JP2010188997A - Opening/closing control device for opening covering material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening/closing control device for an opening covering material for obtaining high position-detecting accuracy even when merely using a sensor to generate pulses depending on rotation of a motor. <P>SOLUTION: A drive unit 3, controlling the opening/closing of a sunroof, includes the motor 4 for driving the sunroof, and the control device 10. Two pulse signals, delivered from two Hall ICs 11 and 12 in different phases and varying in proportion to the number of revolutions of the motor 4, are input to a microcomputer 13, which allows a position counter 32 to measure a sunroof position based on the two pulse signals in consideration of a rotational direction of the motor. Even if a stop mode is present with both relays 15 and 16 turned off, the position counter 32 continues counting during a period of inertia rotation of the motor 4. Even if an inversion mode is present with the relays 15 and 16 reversely switched in turn-on/turn-off, further, the position counter 32 continues counting with the same direction as that before being inverted for a period in which no inversion is detected in determination based on the pulse signals. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an opening / closing control device for an opening covering member that controls opening / closing of a covering member such as a sunroof or a power window provided in an opening of an automobile window, for example.

  For example, some automobiles include an opening cover opening / closing control device that controls opening / closing of a sunroof or a power window according to a driver's switch operation. For example, a sunroof opening / closing control device is known that opens and closes a sunroof and slides the sunroof (for example, Patent Document 1). Further, in recent years, there are some which have a pinching prevention function that detects that a person or an object has been caught in the sunroof or the power window and stops or reverses the operation of the sunroof or the power window.

  In this type of opening / closing control device, it is necessary to detect the position of the covering material in order to control opening / closing of the covering material such as a sunroof and a power window. Conventionally, as a method for detecting the position of a covering material, for example, a Hall IC (rotational speed sensor) that detects a magnet attached to a rotating shaft of a motor is used, and the edge of a pulse signal input from the Hall IC is counted to detect the sunroof. Some performed position detection. In this position detection method, the sunroof opening / closing direction is determined by checking the ON / OFF state of the relay that controls forward / reverse rotation / stop of the motor, and the position counter while grasping the stop of the motor and switching of the rotation direction. The counting process was performed. A position detection method that does not use a Hall IC is also known, which uses a ripple pulse obtained by shaping a signal that detects the current of a DC motor, and detects the position of the covering (sunroof) by counting the edges of the input pulse. Is also known (Patent Document 2). In this case as well, the above method has been adopted for determining the opening / closing direction of the sunroof.

Japanese Patent Publication No. 5-25686 JP-A-10-109534

  However, in the conventional position detection method, the motor stop / reverse timing is determined based on the on / off status of the relay when the stop instruction / reverse instruction is issued. Even after that, the motor actually rotates inertially for a short period, and this inertial rotation amount may not be counted by the position counter. In addition, there is a concern about a counting error that erroneously counts noise on the pulse signal.

  For this reason, in addition to sensors that generate pulse signals such as Hall ICs, a position detection switch that detects the absolute position of the sunroof is provided, and the count value (sunroof position) of the position counter is corrected based on the detection signal of the position detection switch. I was trying to do it. In particular, position correction sensors such as position detection switches are often arranged at positions away from the arrangement positions of the motor and the control unit, and not only the number of position detection switches but also a long harness is required. As described above, in the conventional apparatus, a position correction sensor must be provided in addition to the sensor such as the Hall IC. Therefore, the apparatus is complicated and enlarged due to an increase in the number of assembly points of sensors (an increase in harnesses and the like). However, there is a problem that it is easy to cause inconveniences such as complicated control contents and a decrease in manufacturing efficiency due to an increase in assembly man-hours.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to open and close an opening covering material that can obtain high position detection accuracy only by using a sensor that generates a pulse corresponding to the rotation of a motor. It is to provide a control device.

  In order to achieve the above object, an invention according to claim 1 generates an electric motor for driving a covering member for opening and closing an opening, and a pulse signal having a frequency different in phase proportional to the rotation speed of the electric motor. At least a pair of rotation speed sensors; and a position detection means for determining a moving direction of the covering material based on a pulse signal from the pair of rotation speed sensors and detecting a position of the covering material; The gist of the invention is that, even if an instruction to stop the electric motor for stopping the covering material is issued, the counting of the position counter constituting the position detecting means is continued while the electric motor is moving due to inertia. To do.

  According to this invention, the position detecting means determines the moving direction of the covering material based on at least the pulse signals having different phases from the pair of rotation speed sensors, and detects the position of the covering material. Even if a stop instruction is issued to the electric motor to stop the covering material that is moving (for example, even if the switch of the electric motor is switched to the stop position), the position detection means that the electric motor is moving due to inertia While being judged, the position counter continues counting. For this reason, it is possible to accurately detect the position of the covering material.

  According to a second aspect of the present invention, in the first aspect of the invention, the position detecting means detects the reversal of the covering material even when a reversal instruction is issued to the electric motor for reversing the covering material. If not, the gist is to continue counting of the position counter in the direction before inversion.

  According to the present invention, in addition to the operation of the first aspect of the present invention, even if an inversion instruction for the electric motor is issued, the position detecting means detects the position counter in the direction before the inversion if the inversion of the covering material is not detected. Continue counting. Then, after the reversal of the covering material is detected, the position counter starts counting in the reversal direction.

  According to the first aspect of the present invention, even when a stop instruction is issued to the electric motor, the position counter continues counting while the electric motor is moving due to inertia, so a pulse corresponding to the rotation of the electric motor is generated. If there is at least a pair of rotation speed sensors, high position detection accuracy can be obtained. For example, the combined use of the position correction sensor can be eliminated.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, if the reversal of the covering material is not detected even if the reversal instruction is issued to the electric motor, the position counter counts in the direction before the reversal. Since it continues, it is possible to obtain high position detection accuracy with only at least a pair of rotation speed sensors that generate pulses according to the rotation of the electric motor.

The block diagram which shows schematic structure of the sunroof opening-and-closing control apparatus in one Embodiment. Explanatory drawing which shows the example of a setting of a control position and pinching control. The perspective view of a sunroof is shown, (a) shows a state in which the sunroof is chilled up, and (b) shows a state in which the sunroof is fully opened. The timing chart explaining the relationship between a closing direction and an opening direction about two pulse signals. The flowchart which shows a main routine. The flowchart which shows a slide close process. Same flowchart. The flowchart which shows a reverse action process. The flowchart which shows a rising edge process. The flowchart which shows a falling edge process. The flowchart which shows a rising edge process. The flowchart which shows a falling edge process.

Hereinafter, an embodiment in which the present invention is embodied in an automobile sunroof opening / closing control apparatus will be described with reference to FIGS.
FIG. 3 shows a sunroof opening / closing control device provided on the roof 1 of the automobile AM. The roof 1 of the automobile AM is provided with an opening 1a, and a sunroof (roof glass) 2 as a covering material is provided so as to open and close the opening 1a. The sunroof 2 is slid in the front-rear direction by a known slide mechanism (not shown) and tilted by a known tilt mechanism (not shown). A drive unit (gear assembly) 3 for driving the sunroof 2 is disposed in a state of being embedded in the roof 1 at a front portion of the opening 1a. The drive unit 3 has a configuration in which an electric motor (hereinafter simply referred to as a motor) 4 and a gear unit 5 are assembled together, and an output shaft of the gear unit 5 is operatively connected to the slide mechanism and the tilt mechanism. When the motor 4 is driven, the sunroof 2 is tilted between a tilt-up position and a fully-closed position shown in FIG. 3A, a fully-closed position, and a fully-open position shown in FIG. Slide open / close operation. In this example, when the motor 4 is driven forward from the tilt-up position, the sunroof 2 is tilted down and fully closed, and further slides rearward and fully opened. When the motor 4 is reversely driven from the fully open position, the sunroof 2 moves along a path opposite to that during forward rotation.

  As shown in FIG. 3 (b), the roof 1 is equipped with a wind deflector 6 on the inner front side of the opening 1a. The wind deflector 6 is supported by the left and right arms 7 and 7 while being urged by a spring (not shown) in the direction of rising upward from the opening 1a. When the sunroof 2 is opened, the wind deflector 6 is automatically pushed up by the urging force of the spring. Conversely, when the sunroof 2 is closed, the arms 7 and 7 are pushed against the urging force of the spring against the sunroof 2 so that the wind deflector 6 is Stored.

FIG. 1 shows an electrical configuration diagram of a sunroof opening / closing control device.
The drive unit 3 includes a control device (control circuit board) 10 that drives and controls the motor 4. The control device 10 includes a pair of Hall ICs 11 and 12 as rotation speed sensors, a microcomputer (hereinafter simply referred to as a microcomputer) 13 as position detection means and pinching detection means, a relay drive circuit 14, relays 15 and 16, and various types. Input interface circuits 17 to 19 and a power supply circuit 20 are provided.

  The positive potential of the battery 21 mounted on the automobile is applied to various circuits such as the power supply circuit 20 and the relay drive circuit 14, and a predetermined drive voltage is supplied to the microcomputer 13 and the Hall ICs 11 and 12. . A signal from the ignition switch 22 is input to the microcomputer 13. The operation switch 23 is provided in the interior of the automobile AM and is operated when the sunroof 2 is opened and closed. The neutral position where the open / down SW or the close / up SW is turned on according to the operation direction and the switch is not operated. Then both switches are turned off. A signal from the operation switch 23 is input to the microcomputer 13 via the input interface circuit 17, and the microcomputer 13 drives the relays 15 and 16 via the relay drive circuit 14 in response to this signal to control the rotation of the motor 4.

  A magnet 25 is attached to the rotating shaft 4a of the motor 4. When the motor 4 rotates, the magnetic flux crossing the Hall ICs 11 and 12 changes, and the outputs of the Hall ICs 11 and 12 pass through the input interface circuits 18 and 19, respectively. To the microcomputer 13. Here, the Hall ICs 11 and 12 are arranged so as to obtain an output as shown in FIG. The microcomputer 13 detects the position of the sunroof 2 based on the pulse signals input from the Hall ICs 11 and 12. In this embodiment, no position correction sensor is used. In addition, the sunroof automatic opening / closing device according to the present embodiment employs a pinching prevention function. When a change in load applied to the motor 4 is detected and it is detected that a person or an object has been pinched in the sunroof 2, the motor 4 rotates. The sunroof 2 is reversed so as to be reversed by a predetermined amount (for example, about 20 cm). The microcomputer 13 also performs processing for this pinching prevention function based on pulse signals input from the Hall ICs 11 and 12.

  The microcomputer 13 includes a central processing unit (CPU) 30 and a memory 31, and the memory 31 stores various program data shown in flowcharts in FIGS. Based on these programs, the CPU 30 executes drive control processing for the motor 4, position detection processing for the sunroof 2, and pinching prevention processing. The CPU 30 also includes a position counter 32 and timers (time counters) 33 and 34 as time measuring means. The position counter 32 is for counting the number of pulses (pulse edges in this example) of the pulse signals input from the Hall ICs 11 and 12 in order to detect the position of the sunroof 2 in consideration of the motor rotation direction. The timer 33 is for measuring the pulse interval time of the pulse signal (in this example, the pulse edge interval), and is used for pinching detection processing and the like. The timer 33 is for measuring the elapsed time after the motor stops.

FIG. 2 shows an example of setting the sunroof control position and the pinching threshold (load).
The sunroof 2 has an openable / closable region between a tilt mechanical lock position (a position where the tilt is mechanically fully opened and opened by the stopper) and a slide mechanical lock position (a position where the slide is mechanically fully opened and locked by the stopper). The position where the motor 4 has pulled the drive rod (not shown) the most (maximum reverse rotation position) is the tilt mechanical lock position, and the position where the motor 4 has pushed the drive rod (not shown) the most (maximum forward rotation position). Slide mechanical lock position.

  The sunroof position (hereinafter simply referred to as the roof position) is indicated by a position within the range of D0 to D11. Positions D0 to D11 are set as control positions that appear in order in the motor forward rotation direction (opening direction) from the tilt mechanical lock position to the slide mechanical lock position. D0 is a tilt mechanical lock position, and D11 is a slide mechanical lock position. The tilt area is D0 to D3, the fully closed area is D3 to D5, and the slide area is D5 to D11. In addition, a tilt-up stop position D1, a fully closed stop position D4, and a fully open stop position D10 are set as target values for controlling the stop position. For example, in the case of full-close, if the full-close stop position D4 is the target stop position for control and is within the full-close sections D3 to D5, it is considered to be in the full-close stop position. Each area is divided into 8 sections of 2 types of tilt sections, fully closed sections, and 4 types of slide sections, as shown in the figure, and D0 to D11 other than the stop positions D1, D4, and D10. The position of indicates the boundary position of these sections. Each roof position D0 to D11 is set to a value corresponding to the count value of the position counter 32. The position counter 32 is incremented ("+1" is counted) when the motor is rotating forward (moving in the sunroof opening direction), and decremented ("-1" is counted) when the motor is rotating backward (moving in the sunroof closing direction).

  Further, as shown in FIG. 2, the pinching load (pinching threshold value) is set in a section where pinching detection is necessary. In this example, a section from D6 to D10 is a pinching detection execution section. As the sandwiching threshold value, a value A is set in D6 to D7 and D8 to D9 ("slide section 1"). In the deflector push-down areas D7 to D8 ("slide section 2") where an extra force is required to push the deflector 6 against the biasing force of the spring when the sunroof 2 is closed, the threshold is higher than the threshold value A. The value B is set (A <B). The pinching prevention function is locked in the sections D0 to D6 and D10 to D11 ("slide sections 3, 4", "fully closed sections", tilt sections 1, 2 ") where there is no concern about pinching of fingers or the like from the room. . Further, since the slide sections 3 and 4 are loaded by resistance with the seal attached to the window frame of the opening 1a, pinching detection is not performed so that the load is not erroneously detected as pinching.

  The pinch detection is performed by looking at the amount of drop in the rotational speed of the motor 4 that occurs when the moving speed of the sunroof 2 drops due to the pinching load. Specifically, the pulse period is calculated from the time interval of the pulse edge timed by the timer 33, and when the pulse period exceeds the threshold value, it is determined that the jamming has occurred. The sandwiching thresholds A and B are set to values corresponding to the pulse period when a sandwiching load is applied to the sunroof 2, and the battery voltage is determined as a parameter considering that the motor rotation speed varies depending on the battery voltage. I have to. It is also possible to adopt a detection method in which the change rate of the pulse period is viewed and the change rate is determined to be caught when the change rate is larger than the threshold value.

  The CPU 30 recognizes whether the current motor 4 is rotating forward, stopped, or rotating backward by looking at the on / off states of the relays 15 and 16. That is, the CPU 30 determines that the motor 4 has entered the stop mode and has switched to the reverse mode by looking at the on / off states of the relays 15 and 16. Further, in order to perform the counting process of the position counter 32, it is necessary to grasp the rotation direction of the motor 4, but in this embodiment, the actual rotation of the motor 4 is compared by comparing the output pulses of the pair of Hall ICs 11 and 12. The direction is determined, and the counting process is performed based on the rotation direction.

FIG. 4 is a timing chart of pulse signals output from the two Hall ICs 11 and 12.
As shown in FIG. 4A, the pulse signals output from the Hall ICs 11 and 12 have the same period and the phase is shifted by a quarter period. As shown in FIG. 4B, the relationship between the level of two pulse signals output from the Hall ICs 11 and 12 and the edge depending on whether the movement of the sunroof 2 is a closing direction (reverse direction) or an opening direction (forward direction) Therefore, the motor rotation direction is determined from the relationship between the level of the two pulse signals and the edge. In FIG. 4B, “↑” indicates a rising edge and “↓” indicates a falling edge.

  The programs shown in the flowcharts of FIGS. 5 to 12 stored in the memory 31 are related to the position detection process and the pinching control. FIG. 5 is a main routine, FIGS. 6 and 7 are slide close process routines, and FIG. The operation processing routines, FIGS. 9 to 12, are the routines of the rising edge processing and the falling edge processing for each of the Hall ICs 11 and 12.

Next, each program will be described with reference to FIGS. First, the main routine of FIG. 5 will be described.
In step (hereinafter, “step” will be referred to as “S”) 101, initialization processing of the memory (such as RAM) 31 and the port of the microcomputer 13 is performed.

  In S102, it is determined whether or not the open / down SW is on. If the open / down SW is on, the process proceeds to S107, and the operation is determined from the roof position in S107. If the roof position is in the range of D0 ≦ X ≦ D3, since the tilt is fully closed in FIG. 2, the process proceeds to S109, and tilt down processing is performed in S109. If the roof position is not in the range of D0 ≦ X ≦ D3, since it is a fully closed section or a slide section in FIG. 2, the process proceeds to S108, and a slide open process is performed in S108.

  If the open / down SW is off in S102, the process proceeds to S103, and it is determined in S103 whether the close / up SW is on. If the close / up switch is off, the process returns to S102. If the close / up SW is on, the process proceeds to S104, and the operation is determined based on the roof position in S104. If the roof position is in the range of D5 ≦ X ≦ D11, since it is a slide section in FIG. 2, the process proceeds to S105, and a slide close process is performed in S105. If the roof position is not in the range of D5 ≦ X ≦ D11, since it is the fully closed section or tilt section in FIG. 2, the process proceeds to S106, and the tilt-up process is performed in S106. When the processes of S105 to S108 are completed, the process returns to S102.

Next, as an example of the operation of the sunroof, details of the slide close process in S105 will be described.
First, in S201, the current state of the Hall ICs 11 and 12 is acquired. In the next S202, a sandwiching threshold value (see FIG. 2) corresponding to the roof position is set. That is, the threshold A is set when the roof position is in the “slide section 1”, the threshold B is set when the roof position is in the “slide section 2”, and the pinch prevention function is locked when it is in any other section. Set. These threshold values A and B are set according to the battery voltage at that time with the battery voltage value as a parameter.

  In the next S203, the relay 15 is turned on via the relay drive circuit 14 to drive the motor 4 in the reverse direction. In S204, the timer 33 for detecting motor lock due to a person or an object being caught is started.

  In S205 to S208, it is determined whether a rising edge or a falling edge has occurred in one of the pulse signals of the two Hall ICs 11 and 12. If there is no edge in either pulse signal of the Hall ICs 11 and 12, the process proceeds to S213. If there is an edge in either of the Hall ICs 11 and 12, the respective edge processing is performed in S209 to S212, and the process proceeds to S213.

  In S213, it is determined whether or not the motor 4 is stopped (the relay 15 is turned off). If the motor 4 is stopped, the process proceeds to S214, and it is determined whether or not T2 time has elapsed after the motor is stopped in S214. This is determined by looking at the time measured by the timer 34. If the time T2 has not elapsed, the process returns to S205, and if the time T2 has elapsed, the slide close processing routine is terminated and the process returns to S102 of the main routine. Here, the time T2 is set to a time with a little allowance for the time required for the motor 4 to stop completely after the inertial rotation of the motor 4 is finished after the motor 4 is stopped (both relays 15 and 16 are turned off). On the other hand, if the motor 4 is not stopped in S213, the process proceeds to S215, and it is determined in S215 whether or not there is an edge this time. If there is no edge this time, the process proceeds to S216.

  In S216, it is determined whether or not the edge is T1 time. If the edge is not T1 time, it is determined that the motor is locked, and the process proceeds to S224. In S224, a reverse operation is commanded. That is, the relay 15 is turned off and the relay 16 is turned on to reverse the rotation of the motor 4. On the other hand, if the time T1 has not elapsed since the previous edge detection, the process returns to S205.

  On the other hand, if there is an edge in S215, it is determined in S217 whether or not the current roof position is D4 from the position counter 32. If the roof position is D4, it is a fully closed position, so the process proceeds to S219, where the motor 4 is stopped (relay 15 is turned off). On the other hand, if the roof position is not D4, the process proceeds to S218, in which it is determined whether the close / up SW is on. If the close / up SW is off, the process proceeds to S219, and the motor 4 is stopped (relay 15 is turned off) in S219. On the other hand, if the close / up SW is on, the process proceeds to S220.

  In S220, it is determined whether or not the roof position crosses the section shown in FIG. If the section has changed, the process proceeds to S221. In S221, the sandwiching threshold value is reset, and the process proceeds to S222. On the other hand, if the section has not changed, the process proceeds to S222 with the threshold value unchanged.

  In S222, the period is calculated from the previous and current edges. That is, the period of the pulse signal is calculated from the time measured by the timer 33 (1/4 period) when the current edge is detected. In the next S223, it is determined whether or not the cycle exceeds the sandwiching threshold value. If the cycle exceeds the sandwiching threshold value, the process proceeds to S224, and a reverse operation is commanded in S224. This reversal operation process will be described with reference to FIG. 8, but the main process turns off the relay 15 and turns on the relay 16 to reverse the rotation of the motor 4. On the other hand, if the period does not exceed the sandwiching threshold value, the process returns to S205. Note that the pinching detection may be performed by looking at the change rate of the cycle. In this case, the pinch is determined to be pinched when the cycle change rate is large enough to exceed the threshold value.

Next, details of the reversing operation processing in S224 will be described with reference to FIG.
In S301, the motor 4 during the slide closing is stopped (the relay 15 is turned off). In S302, the motor 4 is operated (relay 16 is turned on) in the reverse (slide open) direction. In S303 to 306, it is determined whether one of the two Hall ICs 11 and 12 has a rising edge or a falling edge. If neither of the Hall ICs 11 and 12 has an edge, the process proceeds to S311. If there is an edge in either of the Hall ICs 11 and 12, the edge processing is performed in S307 to S310, and the process proceeds to S311.

  In S311, it is determined whether or not the motor 4 is stopped (the relay 16 is turned off). If the motor 4 is stopped, the time measured by the timer 34 is observed in S312, and it is determined whether or not T2 time has elapsed after the motor is stopped. If T2 time has not elapsed, the process returns to S303, and if T2 time has elapsed, the reverse operation processing routine is terminated and the process returns to S102. If the motor 4 is not stopped in S311, it is determined in S313 whether there is no T1 time edge. If there is no T1 time edge, it is determined that the motor is locked, and the process proceeds to S316. In S316, the motor 4 is stopped (relay 16 is turned off). On the other hand, if the time T1 has not elapsed, it is determined in S314 whether or not the current roof position is D11 from the value of the position counter 32. If the roof position is D11, it is the fully open stop position, so the process proceeds to S316, where the motor 4 is stopped (relay 16 is turned off). If the roof position is not D11, the process proceeds to S315. In S315, it is determined whether or not the sunroof 2 is reversed by a predetermined amount (for example, about 20 cm). If the sunroof 2 is reversed by a predetermined amount, the process proceeds to S316, and the motor 4 is stopped (relay 16 is turned off) in S316. If the inversion of the sunroof 2 has not reached the predetermined amount, the process returns to S303.

  Therefore, after the sunroof 2 is reversed, the sunroof 2 stops when it becomes D11 (fully opened), the motor is locked, or when the predetermined amount has been reversed. Even after the motor 4 is stopped (both relays 15 and 16 are off), the position detection process is continued until the time T2 elapses. Therefore, inertial rotation after the motor stops is also counted correctly.

  Next, edge processing (S209 to S212 in FIG. 6, S307 to S310 in FIG. 8) when an edge occurs in the Hall IC will be described. Since the flowcharts of FIGS. 9 to 12 are similar to each other, here, processing when a rising edge occurs in the Hall IC 11 of FIG. 9 will be described. 9 to 12 are used when the sunroof 2 moves in the closing direction (motor reverse rotation direction) (when the relay 15 is on), and the processing contents of S209 to S212 in FIG. 6 are used.

  First, in S401, it is determined whether or not it is the first edge after activation. If it is the first edge, since the edge interval cannot be measured, the process proceeds to S403. If it is not the first edge, the process proceeds to S402. In S402, it is determined whether the edge interval is equal to or shorter than T3 time. The time T3 is set to a value less than or equal to the period obtained when the motor 4 rotates at the maximum possible speed during normal operation of the sunroof 2. If the time is equal to or less than T3 time, the current edge is regarded as noise and discarded, and the process is terminated. If it is not less than T3 time, it progresses to S403.

  In S403, it is determined whether or not the previous Hall IC signal is at L level. If it is L level, it can be seen from the output pulse pattern of the Hall IC shown in FIG. If the pattern is H level, it is a pattern that is not normally possible (for example, when noise is judged and an edge is discarded in S402 and an edge on the noise return side is detected), the edge is discarded and the process is terminated. In other words, when inversion is detected despite the fact that the mode is not switched to the inversion mode (the relay 15 remains on) (when the pulse signal of the Hall IC 12 becomes H level when the rising edge of the pulse signal of the Hall IC 11 is detected), The signal (edge) causing the inversion is determined as noise and is not counted by the position counter 32.

  In S404, since it is determined as a valid edge, the motor lock detection timer 33 is restarted. In next step S405, it is determined whether or not the signal of the Hall IC 12 is at the L level. If it is L level, since it is the closing direction from the output pulse pattern of the Hall IC shown in FIG. 4, the process proceeds to S406, and in S406, the position counter 32 is decremented by “−1”. If it is at the H level, the direction is the open direction, so the process proceeds to S407, and in S407, the position counter 32 is incremented by "+1" (increment). The basic processing is the same for each edge processing of FIGS. 10 to 12 except that the Hall IC and signal level to be determined are different. In S307 to S310 in FIG. 8, since the movement of the sunroof during the edge processing is in the open direction, the signal level H / L of the pulse signal to be determined in S403, S503, S603, and S703 in FIGS. It is just the opposite.

  In this way, not only the energization direction of the motor 4 but also the operation direction of the sunroof 2 is discriminated from the output signal pattern of the Hall ICs 11 and 12, and the count of the position counter 32 is continued for a certain time after the energization of the motor 4 is stopped. Thereby, even when the sunroof 2 is moving by inertia when the sunroof 2 is stopped or reversed, the roof position can be accurately counted. Further, since noise superimposed on the output signals of the Hall ICs 11 and 12 can be removed, control without positional deviation is possible even without an absolute position detection switch.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) The opening / closing direction of the sunroof 2 is determined based on two pulse signals with different phases input from the pair of Hall ICs 11 and 12, and the position of the sunroof 2 is counted. Even if both the relays 15 and 16 are turned off and the motor 4 enters the stop mode, the roof position counting process continues until the timer 34 counts the time T2, so that the inertial rotation of the motor 4 is also set as the position. Can be counted. For this reason, the position of the sunroof 2 can be detected accurately. Therefore, the position of the sunroof 2 can be controlled more accurately.

  (2) Even if the relays 15 and 16 are switched on and off in reverse while the sunroof 2 is moving to switch to the inversion mode (S301 and S302), the inversion of the sunroof 2 is detected based on the comparison of the two pulse signals. If not (S405, etc.), position detection in the forward direction before inversion is continued as it is. Then, after the inversion of the sunroof 2 is detected, position detection in the opposite direction (inversion direction) is started. For this reason, the position of the sunroof 2 can be detected accurately.

  (3) When the inversion of the sunroof 2 is detected based on the comparison of the two pulse signals in spite of not switching to the inversion mode for inverting the sunroof 2, the signal (edge) that causes the inversion to be detected (determined) Is treated as noise. For this reason, the mistake that the position counter 32 counts noise can be avoided, and the position of the sunroof 2 can be accurately detected.

  (4) If the pulse period calculated from the time measured by the timer 33 is smaller than a predetermined period and takes a value that cannot occur, the signal (edge) that determines the period is processed as noise. Since the mistake that the position counter 32 counts noise can be avoided, the position of the sunroof 2 can be accurately detected. Therefore, the position of the sunroof 2 can be controlled more accurately.

  (5) Since the position of the sunroof 2 can be accurately detected by the effects (1) to (4), the combined use of the position correction sensor (position detection switch) can be eliminated. Therefore, it is possible to simplify the structure of the sunroof opening / closing control device and to make it more compact along with the reduction of sensor parts, and to simplify the contents of the position detection processing of the microcomputer 13.

  (6) The sunroof 2 is detected to be caught based on the pulse signal. That is, when the period calculated from the time measured by the timer 33 exceeds the threshold value, it is determined that the object is caught. Therefore, since the pair of Hall ICs 11 and 12 can be used for both position detection and pinching detection, it is not necessary to separately provide a pinion detection sensor. That is, even if the pinch prevention function is provided, only the Hall ICs 11 and 12 can cope.

  (7) In the pinching detection process, if the next signal (edge) for viewing the cycle of the pulse signal is not input even after the set time T1, it is determined that pinching has occurred. Therefore, even if the motor is completely locked and the period of the pulse signal cannot be obtained, the pinching can be reliably detected.

  (8) Since the timer 33 is used in combination with the time measurement for obtaining the pulse period for the pinching detection and the time measurement for the noise processing described in the above (4), the number of counters used for the timer can be reduced. In addition, the counter processing by the CPU 30 is not time-consuming.

In addition, embodiment is not limited to said structure, It can implement also in the following aspect.
・ Noise processing may be eliminated. Even in the inertial rotation section, the position of the sunroof 2 can be counted even if the position of the sunroof 2 is continuously counted, or even if the reversal mode is entered, the position detection process for reversing the position counting direction after the motor reversal is actually confirmed. The position can be detected sufficiently accurately.

  -Although applied to the opening / closing control apparatus whose covering material is a sunroof, you may apply to the opening / closing control apparatus whose covering material is a power window. In this case, the position of the power window can be accurately detected only with the pair of rotation speed sensors, and for example, the position correction sensor can be eliminated. Of course, it is possible to provide a position correction sensor to make the position accuracy more accurate.

-It can be applied to a cover opening / closing control device that does not employ a pinching prevention function. Even in this case, the position of the covering material such as the sunroof can be accurately detected.
In the embodiment, two Hall ICs 11 and 12 are used, but three or more Hall ICs may be used. A configuration having at least two rotation speed sensors is sufficient.

In the above-described embodiment, the sunroof 2 operates only while the operation switch 23 is being pressed. However, the operation may be continued automatically even if the switch is once pressed and then released.
-The rotation speed sensor is not limited to the Hall IC. For example, a limit switch, a proximity sensor, a photocoupler, or the like may be used. In short, any sensor that can generate a pulse signal corresponding to the rotation of the motor is sufficient. At this time, the sensor may be an analog signal output, or may be configured to convert the sensor output signal into a pulse signal (digital signal) through an A / D converter before input to the CPU.

  ・ It is not limited to the adoption of automobiles. The present invention can be widely applied to an opening / closing control device for a covering material for opening / closing an opening such as various vehicles and building windows.

  DESCRIPTION OF SYMBOLS 2 ... Sunroof as a covering material, 4 ... Electric motor, 11, 12 ... Hall IC as a rotation speed sensor, 13 ... Microcomputer as a position detection means and a pinch detection means, 30 ... CPU which comprises a position detection means, 32... Position counter constituting position detecting means, 33... Position detecting means and timer as time measuring means, 34... Timer constituting position detecting means.

Claims (2)

An electric motor that drives a covering for opening and closing the opening;
At least a pair of rotation speed sensors for generating pulse signals having different frequencies in phase proportional to the rotation speed of the electric motor;
A position detecting means for determining a moving direction of the covering material based on a pulse signal from the pair of rotation speed sensors and detecting a position of the covering material;
The position detecting means continues counting of a position counter constituting the position detecting means while the electric motor is moving due to inertia even when a stop instruction is issued to the electric motor for stopping the covering material. Opening / closing control device for opening covering material. The position detecting means continues counting of the position counter in the direction before reversal even if a reversal instruction to the electric motor for reversing the covering material is issued, if reversal of the covering material is not detected. The opening / closing control device for an opening covering member according to claim 1.

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