JP4868057B2 - Meter system - Google Patents

Description

  The present invention relates to a meter system including a vehicle indicating instrument that swings a pointer by a step motor.

  Conventionally, there has been known a vehicle indicating instrument that rotates a pointer by applying a drive signal alternating according to an electrical angle to a field winding of a step motor to indicate a vehicle state value according to the rotation position of the pointer. It has been.

  In the vehicle indicating instrument of Patent Document 1, the pointer is returned to the zero position indicating the zero value of the vehicle state value by the rotation in the return zero direction. Then, by controlling the drive signal applied to the field winding of the stepper motor so as to rotate the pointer in the nulling direction by a nulling angle of a predetermined electrical angle corresponding to a graduation angle equal to or greater than the maximum graduation angle, The stopper mechanism stops at a stopper position within a predetermined range from the position to the zero return direction (zero point stopper position detection operation of the forced zero return method), and the electrical angle corresponding to the stopper position is used as a reference for drive signal control.

  Further, in the vehicle indicating instrument of Patent Document 2, the induced voltage generated in the field winding is controlled while controlling the drive signal applied to the field winding of the step motor so as to rotationally drive the pointer in the nulling direction. Detected. As a result, an induced voltage is generated in the field winding while the pointer is rotating, and when the pointer is stopped, the induced voltage generated in the field winding is lowered. Therefore, when the detection voltage of the induced voltage generated in the field winding is lower than the set value, it is assumed that the pointer has stopped at the stopper position (voltage detection type zero stopper position detection operation), and the stopper The electrical angle corresponding to the position is updated and set. According to such a series of processing, even if the stepping motor steps out due to disturbances such as vibration before starting the indicator instrument and the rotational position of the pointer is shifted, the drive signal is accurately calculated based on the updated electrical angle. It becomes possible to control.

JP-A-6-38593 Japanese Patent No. 3770095

  By the way, the meter system has a flasher device that performs turn lamps (hazard lamps), buzzers, and flashing control of the buzzer that blows in conjunction with the flashing of the lamp, in addition to the above-mentioned vehicle indicating instrument. I have. In recent years, it has been considered to integrate the system by incorporating such a function of the flasher device (flasher function) into the above-mentioned indicator for a vehicle and reduce the production cost of the vehicle.

  However, when the flasher function is incorporated into the vehicle indicating instrument, the field winding of the vehicle indicating instrument and the flasher semiconductor switch for flashing the flasher may be close to each other in the meter system. Further, in order to blink the flasher, it is necessary to turn on and off the semiconductor switch, and induction noise is generated by turning on and off the semiconductor switch.

  For this reason, if the semiconductor switch of the flasher function unit operates during the zero-point stopper position detection operation of the voltage detection method, erroneous detection of the stopper position may occur due to the induced noise, and the stopper position may be shifted. As a result, there is a possibility that a problem that the vehicle state value cannot be correctly indicated can occur.

  On the other hand, even if the semiconductor switch of the flasher function part operates during the zero-stop position detection operation of the forced zero return method, the stopper position is erroneously detected due to the induction noise, and the stopper position shifts. There is no. However, in the forced zero return type zero point stopper position detection operation, the step out and zero return are repeated while the pointer is stopped at the stopper position, and the pointer vibrates and looks bad or abnormal noise is generated. Therefore, the user may feel uncomfortable.

  The present invention has been made in view of the above circumstances, and an object thereof is to reduce the occurrence of an inaccurate indication of the vehicle state value and the user's uncomfortable feeling while integrating the system. It is to provide a meter system that can be used.

  In order to achieve such an object, in the first aspect of the invention, the drive control unit is controlled to turn on and off the flasher semiconductor switch so that the flasher blinks when the stopper position detection operation execution condition is satisfied. In this case, a forced zero return type zero stopper position detection operation is executed. On the other hand, if the flasher semiconductor switch is not controlled to be turned on and off to blink the flasher, the voltage detection type zero stopper position detection operation is performed. I decided to do it.

  According to the configuration of the first aspect, in the state where the induced voltage of the field winding is not likely to be affected by the induced noise generated by turning on and off the flasher semiconductor switch, the zero point stopper position detecting operation of the voltage detecting system is performed. The electrical angle corresponding to the stopper position detected by the zero-point stopper position detection operation of the voltage detection method executed in the low state can be set as the zero point. In addition, according to the configuration of the first aspect, in the state where the induced voltage of the field winding is highly likely to be affected by the induced noise generated by the on / off of the flasher semiconductor switch, the zero point stopper of the forced nulling method is used. The zero point can be set by executing the position detection operation, and the on / off control of the flasher semiconductor switch is controlled in conjunction with the zero point stopper position detection operation of the forced zero return method. As a result, it becomes difficult to notice the vibration of the pointer and the feeling of discomfort is reduced. Therefore, according to the first aspect of the present invention, it is possible to reduce the occurrence of an inaccurate indication of the vehicle state value and the user's uncomfortable feeling while integrating the system.

  In the first aspect of the present invention, in the invention according to the second aspect, the drive control unit switches on / off of the flasher semiconductor switch in order to blink the flasher while executing the zero point stopper position detection operation of the voltage detection method. When controlled, the zero point stopper position detection operation of the voltage detection method is completed without setting the electrical angle corresponding to the detected stopper position as the zero point by executing the zero point stopper position detection operation of the voltage detection method. Later, a forced zero return type zero stopper position detection operation was executed. As a result, even when the on / off control of the flasher semiconductor switch is controlled during the voltage detection type zero stopper position detection operation, an inaccurate indication of the vehicle state value is generated and the user Can be reduced from feeling uncomfortable.

  In addition, according to the second aspect of the present invention, only when the on / off control of the flasher semiconductor switch is controlled during a short period in which the voltage detection type zero-point stopper position detection operation is performed, Even if the on / off control of the flasher semiconductor switch is controlled during the period in which the zero point stopper position detection operation is executed and the above-mentioned pointer swinging operation is executed, the zero point stopper position detection operation of the forced zero return method is not executed for that reason. Therefore, it is possible to effectively use the period during which the needle swinging operation is executed.

  In the configuration according to the second aspect, when the on / off control of the flasher semiconductor switch is controlled while the zero point stopper position detection operation of the voltage detection method is being performed, the drive control unit After the zero point stopper position detection operation has been completed, the zero point stopper position detection operation of the forced nulling method has been executed, but the present invention is not limited to this. The drive control unit may execute the zero-stop stopper position detection operation of the zero return method immediately when the on / off of the flasher semiconductor switch is switched while the zero-stop position detection operation of the voltage detection method is being executed. .

  In the configuration according to claim 1 or 2, the system is integrated by arranging the field windings of the flasher semiconductor switch and the step motor on the same substrate as in the invention according to claim 3. Also good. Alternatively, in the configuration according to claim 1 or 2, the drive control unit and the flasher on / off switching control unit are configured by the same control device as in the invention according to claim 4, thereby integrating the system. Also good. The invention described in claim 4 can be used in combination with the invention described in claim 3.

  Note that the flasher function unit may include not only the flasher but also a buzzer that sounds in conjunction with the flashing of the flasher. In this case, as in the fifth aspect of the invention, in order to integrate the vehicle indicating instrument and the flasher function unit as a meter system, at least one of the flasher semiconductor switch and the buzzer semiconductor switch constituting the flasher function unit. And the field winding of the step motor may be arranged close to each other.

  Therefore, in the configuration according to claim 5, the drive control unit applies the field winding of the flasher semiconductor switch and the buzzer semiconductor switch to operate the flasher or the buzzer when the stopper position detection operation execution condition is satisfied. When ON / OFF of semiconductor switches arranged in close proximity is controlled to switch, a zero-stopper position detection operation of forced zeroing is performed, while a flasher semiconductor switch and buzzer semiconductor are used to operate the flasher or buzzer. When the on / off control of the semiconductor switch arranged close to the field winding in the switch is not controlled to switch, the zero point stopper position detection operation of the voltage detection method is executed.

  According to the configuration described in claim 5, the induced noise generated by the on / off of the semiconductor switch disposed in the state where the induced voltage of the field winding is close to the field winding among the flasher semiconductor switch and the buzzer semiconductor switch. In a state where there is a low possibility of being affected by this, the zero-stopper position detection operation of the voltage detection method can be executed, and the stopper position detected by the zero-stopper position detection operation of the voltage detection method executed in the low state The electrical angle corresponding to can be set as a zero point. According to the configuration of the fifth aspect, the induced voltage of the field winding is generated by turning on and off the semiconductor switch arranged in the state close to the field winding among the flasher semiconductor switch and the buzzer semiconductor switch. In a state where there is a high possibility of being affected by induced noise, the zero point stopper position detection operation of the forced nulling method can be executed to set the zero point. Since the on / off control of the switch is controlled, the user is distracted by the flashing of the flasher or the sound of the buzzer, and is less likely to notice the vibration and abnormal noise of the pointer, thereby reducing a sense of discomfort. Therefore, according to the fifth aspect of the present invention, it is possible to reduce the occurrence of an inaccurate indication of the vehicle state value and the user feeling uncomfortable while integrating the system.

  In the fifth aspect of the present invention, in the invention according to the sixth aspect, the dynamic control unit is configured to operate the flasher semiconductor switch and the buzzer so as to operate the flasher or the buzzer while performing the zero point stopper position detection operation of the voltage detection method. Corresponding to the stopper position detected by executing the zero point stopper position detection operation of the voltage detection method when the on / off control of the semiconductor switch arranged in the state close to the field winding among the semiconductor switches is controlled. Without setting the electrical angle to be zero as the zero point stopper position detecting operation of the forced zeroing method after the zero point stopper position detecting operation of the voltage detecting method is completed. As a result, even when the on / off control of the semiconductor switch arranged in the close state is controlled while the voltage detection type zero stopper position detection operation is being performed, the vehicle state value is inaccurate. It is possible to reduce the generation of instructions and the user's feeling of discomfort.

  In addition, according to the sixth aspect of the present invention, when the on / off control of the semiconductor switch arranged in the proximity state is controlled during a short period of time when the zero-stopper position detection operation of the voltage detection method is executed. However, even if the on / off control of the semiconductor switch arranged in the proximity state is controlled during the period in which the forced zeroing type zero stopper position detection operation is performed and the pointer swinging operation is performed, for that reason Since the zero point stopper position detection operation of the forced nulling method is not executed, the period during which the needle swinging operation is executed can be used effectively.

  In the configuration according to the sixth aspect, the drive control unit turns on and off the semiconductor switch disposed in the state of being close to the field winding while performing the zero-point stopper position detection operation of the voltage detection method. When the switching control is performed, the forced zero return type zero stopper position detection operation is executed after the voltage detection type zero stopper position detection operation is completed, but the present invention is not limited to this. If the on / off control of the semiconductor switch arranged in the state close to the field winding is controlled while the voltage detection type zero-point stopper position detection operation is being performed, the drive control unit immediately A zero-point stopper position detection operation of a zero method may be executed.

  In the configuration according to claim 5 or 6, as in the invention according to claim 7, at least one of the flasher semiconductor switch and the buzzer semiconductor switch and the field winding of the step motor are arranged on the same substrate. The system may be integrated by arranging in the system. Alternatively, in the configuration described in claim 5 or 6, as in the invention described in claim 8, the drive control unit and at least one of the flasher on / off switching control unit and the buzzer on / off switching control unit are controlled by the same control. The system may be integrated by configuring the apparatus. The invention described in claim 7 can be used in combination with the invention described in claim 8.

It is a front view which shows the front structure about 1st Embodiment of the meter system which concerns on this invention. It is sectional drawing along the II-II line | wire in FIG. It is a block diagram which shows the electric circuit structure about the meter system of 1st Embodiment. It is a perspective view which shows the principal part from a perspective direction about the meter system of 1st Embodiment. It is a top view which shows the principal part from the plane direction about the meter system of 1st Embodiment. It is a characteristic view which shows an example of the drive signal applied to the field winding of the step motor about the meter system of 1st Embodiment. It is a front view which shows the state which the pointer stopped in the stopper position about the meter system of a 1st embodiment from the front direction. It is a flowchart which shows an example of the process sequence about the meter starting process which the meter system of 1st Embodiment performs. It is a flowchart which shows an example of the process sequence about the meter starting process which the meter system of 2nd Embodiment performs. (A) is a timing chart showing the transition of the pointer when the on / off switching of the semiconductor switch is not controlled during the voltage detection type ZPD process in the operation example of the meter system according to the second embodiment. (B) is a timing chart showing the on / off switching timing of the semiconductor switch when the on / off switching of the semiconductor switch is not controlled during the voltage detection type ZPD process. (A) is a timing chart showing the transition of the pointer when the on / off switching of the semiconductor switch is controlled during the voltage detection type ZPD process in the operation example of the meter system according to the second embodiment. (B) is a timing chart showing the on / off switching timing of the semiconductor switch when the on / off switching of the semiconductor switch is controlled during the ZPD processing of the voltage detection method.

(First embodiment)
Hereinafter, a first embodiment of a meter system according to the present invention will be described with reference to FIGS. In the present embodiment, the meter system 1 is assumed to be installed in front of the driver's seat in the vehicle as a speedometer.

  As shown in FIGS. 1 to 3, the meter system 1 includes a vehicle indicating instrument 1 a having an instrument panel 10, a pointer 20, a rotary inner unit 30, a substrate 40, and a control unit 60. .

  As shown in FIG. 1, the instrument panel 10 has a vehicle speed display unit 11 for displaying a vehicle speed value on a display surface 10 a, and the display surface 10 a is arranged toward the driver's seat side. The vehicle speed display unit 11 has a plurality of vehicle speed values (0 km / h, 20 km / h,..., 160 km / h) from a zero value (0 km / h) as a reference of the vehicle speed value to an upper limit value (180 km / h). 180 km / h) is displayed in an arc shape. The vehicle speed value corresponds to the vehicle state value described in the claims, and the instrument panel 10 corresponds to the scale plate described in the claims.

  As shown in FIGS. 1 and 2, the pointer 20 is connected to the pointer shaft 30 b of the rotary inner unit 30 on the base end 21 side, and is opposite to the nulling direction X and the nulling direction X. It is possible to rotate along the display surface 10a of the instrument panel 10 in the zero-separation direction Y which is the direction. The pointer 20 indicates a value corresponding to the rotational position among the vehicle speed values displayed on the vehicle speed display unit 11 by rotating in the nulling direction X or the zeroing direction Y. The pointer 20 can be returned to the zero position indicating the zero value by rotating in the return zero direction X. In the present embodiment, the nulling direction X is a direction from the upper limit value toward the zero value, and the separation zero direction Y is a direction from the zero value toward the upper limit value.

  As shown in FIG. 2, the turning inner unit 30 includes an inner unit main body 30a, a pointer shaft 30b, and a casing 30c. The internal unit main body 30 a is disposed on the back side of the substrate 40 substantially parallel to the instrument panel 10. The internal machine main body 30a incorporates a two-phase step motor M, a reduction gear mechanism G, and a stopper mechanism S (FIG. 4) in a casing 30c. The pointer shaft 30 b is supported by a casing 30 c fixed to the back surface of the substrate 40, and supports the proximal end portion 21 of the pointer 20 through the substrate 40 and the instrument panel 10. The internal machine main body 30a rotationally drives the pointer shaft 30b coaxially with the output stage gear 34 of the reduction gear mechanism G and consequently the pointer 20 by the reduction rotation of the reduction gear mechanism G interlocking with the rotation of the step motor M.

  As shown in FIGS. 4 and 5, the step motor M is configured by combining a stator Ms and a magnet rotor Mr. The stator Ms has a yoke 31 and two-phase field windings 32 and 33. The yoke 31 has a pair of magnetic poles 31a and 31b having a pole shape, and an A-phase field winding 32 is wound around the magnetic pole 31a, while a B-phase field winding 33 is wound around the magnetic pole 31b. It is wound. The magnet rotor Mr is coaxially fixed to the rotation shaft 35a of the reduction gear mechanism G. N poles and S poles as magnetic poles are alternately formed in the rotation direction on the outer circumferential surface of the magnet rotor Mr that opens a gap between the magnetic poles 31a and 31b of the yoke 31.

  In the step motor M having such a configuration, as shown in FIG. 6, an AC A-phase drive signal whose voltage alternates in a cosine function according to the electrical angle is applied to the A-phase field winding 32. On the other hand, an alternating B-phase drive signal whose voltage alternates in a sine function according to the electrical angle is applied to the B-phase field winding 33. When such A-phase and B-phase drive signals that are 90 degrees out of phase with each other are applied, an alternating magnetic flux is generated in each of the field windings 32 and 33, and the generated alternating magnetic flux is converted into the yoke 31 and the magnet rotor Mr. Pass between the magnetic poles. The magnet rotor Mr rotates in accordance with the voltage change of the A-phase and B-phase drive signals according to the electrical angle.

  As shown in FIG. 4, the reduction gear mechanism G has a plurality of gears 34 to 37 made of spur gears. The output stage gear 34 is coaxially connected to the pointer shaft 30b, and the input stage gear 35 is coaxially fixed to the rotary shaft 35a supported by the casing 30c. The intermediate gears 36 and 37 are coaxially supported by a rotating shaft 36a fixed to the casing 30c, so that they can rotate integrally. The intermediate gear 36 meshes with the output stage gear 34, and the intermediate gear 37 meshes with the input stage gear 35.

  With this configuration, the reduction gear mechanism G reduces the rotation of the magnet rotor Mr of the step motor M and transmits the reduced rotation to the pointer 20. Therefore, when the rotational position of the magnet rotor Mr changes according to the change of the A-phase and B-phase drive signals according to the electrical angle, the rotational position of the pointer 20 also changes. In the present embodiment, the direction in which the electrical angle is decreased corresponds to the zero return direction X of the pointer 20, and the direction in which the electrical angle is increased corresponds to the zeroing direction Y of the pointer 20.

  As shown in FIG. 4, the stopper mechanism S includes a contact member 38 and a stopper member 39. The abutting member 38 is formed in a strip plate shape protruding from the output stage gear 34, and can rotate integrally with the gear 34. The stopper member 39 is formed in an L shape that protrudes inward from the casing 30 c, and the protruding end 39 a is on the side corresponding to the return zero direction X with respect to the contact member 38 on the rotation track of the contact member 38. Is located.

  As shown in FIG. 7, the pointer 20 has a predetermined range from the zero position to the zero return direction X in a state where the contact member 38 is locked to the tip end portion 39 a of the stopper member 39 by the rotation in the zero return direction X. It stops at the inner stopper position. In the present embodiment, in the ZPD process described later, the electrical angle corresponding to the stopper position is updated and set as the zero point θ0 (0 degree). Incidentally, when the meter system 1 is manufactured, the stopper position is set within a range of, for example, 450 degrees in terms of the electrical angle of the step motor M from the zero position of the pointer 20 to the zero return direction X.

  As shown in FIG. 3, the meter system 1 includes a flasher function unit 50 having an indicator 51, a flasher semiconductor switch 52, a buzzer 53, and a buzzer semiconductor switch 54.

  Among these, the indicator 51 is disposed on the display surface 10 a (not shown in FIG. 1), and is connected to the control unit 60 via the flasher semiconductor switch 52. When the flasher semiconductor switch 52 is turned on, the indicator 51 is supplied with power from the control unit 60 and is lit. On the other hand, when the flasher semiconductor switch 52 is turned off, the power from the control unit 60 is turned on. It is shut off and turned off. Then, the on / off switching of the flasher semiconductor switch 52 is controlled by the control unit 60, so that the indicator 51 blinks.

  Further, the buzzer 53 is connected to the control unit 60 via the buzzer semiconductor switch 54. When the buzzer semiconductor switch 54 is turned on, the buzzer 53 is supplied with power from the control unit 60, and when the buzzer semiconductor switch 54 is turned off, the buzzer 53 is powered by the control unit 60. It is blocked and does not sound. The control unit 60 controls the on / off of the buzzer semiconductor switch 54 in conjunction with the on / off of the flasher semiconductor switch 52, so that the buzzer 53 sounds in conjunction with the indicator 51.

  Note that the indicator 51 is illustrated as a single indicator in FIG. 3 for the sake of convenience, but actually, the right turn blinks in synchronization with the blinking of a turn lamp for right turn (not shown) to indicate that the vehicle turns right. And a left turn indicator that blinks in synchronization with blinking of a left turn turn lamp (not shown) for indicating that the vehicle makes a left turn. The indicator 51 corresponds to the flasher described in the claims.

  The control unit 60 is mainly composed of a microcomputer having a memory 61, and is mounted on the substrate 40 (FIG. 2). The memory 61 includes an execution program for executing a meter start-up process S1 (including a voltage detection type zero-point stopper position detection operation, a forced zero-type zero point stopper position detection operation, a zero point setting operation, a ZPD process, etc.) S1 described later. Is stored, and the latest zero point θ0 set (updated) by executing the meter activation process S1 is also stored. In addition, the memory 61 has a storage area for a ZPD flag indicating that the ZPD processing has been executed while the control unit 60 is being activated.

  The control unit 60 is electrically connected to the flasher function unit 50, a vehicle door sensor 70, a vehicle speed sensor 71, a vehicle side device (not shown), an ignition switch IG, and a battery power source B which will be described later. The control unit 60 is activated by direct power supply from the battery power supply B when the door sensor 70 detects the opening of the vehicle door or when an unlock signal or a lock signal is input from the vehicle side device. In addition, when the ignition switch IG is turned on until a set time (for example, 2 minutes) elapses after activation, the control unit 60 maintains the activation state by power supply from the battery power supply B, and thereafter the ignition unit IG When the switch IG is turned off, it sleeps. On the other hand, the control unit 60 sleeps when the ignition switch IG is not turned on until the set time elapses after activation, and restarts when the ignition switch IG is turned on after the sleep. The restart after the sleep may be performed, for example, when the vehicle door is opened or when the brake pedal is depressed, in addition to when the ignition switch IG is turned on. The control unit 60 sets the ZPD flag when the ZPD process is executed during the activation, and resets the ZPD flag immediately before going to sleep.

  When a predetermined stopper position detection operation execution condition is satisfied, the control unit 60 first determines whether or not the flasher driving condition is satisfied, and then determines that the flasher driving condition is satisfied. If the zero return stopper position detection operation of the forced return zero method is executed and it is not determined that the flasher drive condition is satisfied, the pointer swinging operation and the voltage detection method The zero point stopper position detection operation is executed.

  Here, the outline of the zero point stopper position detection operation of the forced zeroing method will be described briefly. The field windings 32 and 33 of the step motor M are arranged so that the pointer 20 rotates in the zeroing direction X by a predetermined nulling angle. This is a zero-point stopper position detection operation in which the pointer 20 is stopped at the stopper position by controlling the A-phase and B-phase drive signals applied to. The predetermined zero return angle is an electrical angle corresponding to a graduation angle equal to or greater than the maximum graduation (in this embodiment, “180 km / h”). Further, since the zero point stopper position detection operation of the voltage detection method is known, a detailed description thereof is omitted here.

  The outline of the needle swinging operation will be described. The A phase and B applied to the field windings 32 and 33 of the step motor M so that the pointer 20 once stops in the zero-separating direction Y and then stops. This is an operation for controlling the phase drive signal. The outline of the zero point stopper position detection operation of the voltage detection method will be briefly described. After the end of the above-described pointer swinging operation, the field of the step motor M is controlled so that the pointer 20 continues to rotate in the return zero direction X. When the induced voltage generated in the field windings 32 and 33 is detected while controlling the A-phase and B-phase drive signals applied to the magnetic windings 32 and 33, and this detected voltage is below the set value. This is an operation of estimating that the pointer 20 has stopped at the stopper position (detecting that the pointer 20 has stopped at the stopper position). Since the needle swing-up operation and the voltage detection type zero-point stopper position detection operation are also known, detailed description thereof is omitted here.

  Further, the stopper position detection operation execution condition is that the control unit 60 is activated. For example, the control unit 60 opens the vehicle door, turns on the ignition switch IG, or depresses the brake pedal. Start with that. Further, the control unit 60 executes a zero point setting operation which is an operation for setting (updating) the electrical angle corresponding to the stopper position detected by executing the stopper position detecting operation as the zero point θ0. Therefore, the control unit 60 corresponds to the zero point setting means described in the claims. The forced zero return type zero stopper position detection operation and the zero point setting operation are also referred to as forced zero return type ZPD processing, and the voltage detection type zero stopper position detection operation and the zero point setting operation are combined. Thus, it is also referred to as a ZPD process of voltage return zero method. The control unit 60 applies the A-phase and B-phase drive signals to the field windings 32 and 33 of the step motor M with reference to the zero point θ0 set by executing the ZPD process. The control unit 60 corresponds to a stopper position detection operation execution means, a zero point setting means, an application means, a drive control unit, and a control device described in the claims.

  The control unit 60 detects the vehicle speed sensor 71 by controlling the A-phase and B-phase drive signals based on the zero point θ0 of the electrical angle stored in the memory 61 in the start-up state after execution of the ZPD process. The vehicle speed value is instructed to the pointer 20.

  Further, the control unit 60 determines whether or not a predetermined flasher driving condition based on a manual operation of the user is satisfied, and when determining that the flasher driving condition is satisfied, the control unit 60 responds to the flasher driving condition determined to be satisfied. In order to blink the flasher in this manner, the on / off control of the flasher semiconductor switch 52 and the buzzer semiconductor switch 54 is controlled.

  Specifically, in the flasher driving condition, a right turn turn lamp disposed on the right side in the forward direction of the vehicle on which the meter system 1 is mounted blinks, or a left turn turn lamp disposed on the left side in the forward direction of the vehicle. It includes that the combination lever (not shown) that blinks is set to a turn lamp blinking position (a position shifted by a predetermined angle in the vertical direction from the reference position).

  The flasher driving condition includes a hazard lamp switch that blinks both a right turn turn lamp disposed on the right side in the forward direction of the vehicle on which the meter system 1 is mounted and a left turn turn lamp disposed on the left side in the forward direction of the vehicle. Is set to the hazard blinking position (position pushed from the reference position).

  Further, the flasher driving condition includes that a command signal is input to the control unit 60 from a portable device (not shown) that remotely controls the vehicle using wireless communication with the vehicle. Specifically, in the portable device, an unlock button for unlocking the vehicle door, a lock button for locking the vehicle door, and the like are arranged, and when these unlock button and lock button are pushed, An unlock signal and a lock signal indicating that are transmitted from the portable device. These unlock signals and lock signals are received by a vehicle-side device (not shown) mounted on the vehicle and input to the control unit 60. The flasher driving condition includes that such an unlock signal or lock signal is input to the control unit 60.

  Then, when the combination lever is set at a position where the right turn turn lamp blinks, the control unit 60 flashes so that the right turn indicator blinks and the buzzer 53 sounds in conjunction with the blinking of the right turn turn lamp. On / off control of the semiconductor switch 52 and the buzzer semiconductor switch 54 is controlled. Similarly, when the combination lever is set at a position where the left turn turn lamp blinks, the control unit 60 causes the left turn indicator to blink in conjunction with the blinking of the left turn turn lamp and the buzzer 53 to sound. On / off control of the flasher semiconductor switch 52 and the buzzer semiconductor switch 54 is controlled. Further, when the hazard lamp switch is set to the on state, the control unit 60 flashes so that the indicator 51 blinks and the buzzer 53 sounds in conjunction with blinking of both the right turn turn lamp and the left turn turn lamp. On / off control of the semiconductor switch 52 and the buzzer semiconductor switch 54 is controlled. In addition, when an unlock signal or a lock signal is input from the portable device, the control unit 60 interlocks with blinking of both the right turn turn lamp and the left turn turn lamp to indicate to the user that these signals have been input. Thus, a so-called answerback is performed in which the on / off control of the flasher semiconductor switch 52 and the buzzer semiconductor switch 54 is controlled so that the indicator 51 blinks and the buzzer 53 sounds. The control unit 60 corresponds to a flasher on / off switching control unit and a buzzer on / off switching control unit described in the claims.

  Here, in the meter system 1 of the present embodiment, the field windings 32 and 33 constituting the step motor M are arranged on the substrate 40, and the flasher semiconductor switch 52 and the buzzer constituting the flasher function unit 50 are arranged. The semiconductor switch 54 is also disposed on the same substrate 40, and is disposed on the same substrate 40.

  In the meter system 1 according to the present embodiment, the same control unit 60 executes the ZPD process and the on / off switching control of both the flasher semiconductor switch 52 and the buzzer semiconductor switch 54.

  Thus, by integrating the vehicle indicating instrument 1a and the flasher function unit 50 as the meter system 1, the system cost of the vehicle can be reduced. The field windings 32 and 33, the flasher semiconductor switch 52, and the buzzer semiconductor switch 54 are arranged close to each other.

  When the field windings 32 and 33, the flasher semiconductor switch 52, and the buzzer semiconductor switch 54 are arranged close to each other, when the flasher function unit 50 operates when the ZPD processing of the step motor M is performed, the flasher semiconductor switch 52 and the buzzer semiconductor switch 54 may cause erroneous detection of the stopper position due to induction noise generated by the on / off switching control of the buzzer semiconductor switch 54, and the stopper position may be shifted. As a result, there is a possibility that the vehicle speed value cannot be correctly indicated.

  Therefore, the control unit 60 executes the meter activation process S1 shown in FIG. 8 immediately after the activation. As described above, the stopper position detection operation execution condition is that the control unit 60 is activated. Therefore, the stopper position detection operation execution condition is satisfied when the control unit 60 is activated.

  When starting the meter activation process S1, the control unit 60 first determines whether or not the flasher drive condition is satisfied as a determination process in step S11. Here, if it is determined that the flasher driving condition is satisfied (“Yes” in the determination process of step S11), the control unit 60 determines that the ZPD flag stored in the memory 61 is the determination process of step S12. By determining whether it is set or reset, it is determined whether the ZPD process has been executed.

  Here, when it is determined that the ZPD flag is set and the ZPD process has been executed (“Yes” in the determination process of step S11), the control unit 60 is established as the subsequent process of step S13. The flasher semiconductor switch 52 and the buzzer semiconductor switch 54 are switched on and off in order to cause the indicator 51 to flash in a manner corresponding to the flasher driving condition determined as above and to sound the buzzer 53 in conjunction with the flashing. When the on / off control of the semiconductor switches 52 and 54 is controlled, the control unit 60 shifts to the determination process of the previous step S11 and executes the determination process of step S11 again.

  On the other hand, in the determination process of step S11, if the ZPD flag is reset and it is not determined that the ZPD process has been executed ("No" in the determination process of step S11), the control unit 60 proceeds to step S14. In order to cause the indicator 51 to blink in a manner corresponding to the flasher driving condition that is determined to be established, and to sound the buzzer 53 in conjunction with the blinking, the flasher semiconductor switch 52 and the buzzer semiconductor switch 54 are processed. ON / OFF switching control. In addition, the control unit 60 executes forced zero return type ZPD processing in conjunction with the on / off switching control of the semiconductor switches 52 and 54. When the on / off control of the semiconductor switches 52 and 54 is controlled and the forced nulling ZPD process is executed, the control unit 60 proceeds to the determination process of the previous step S11, and the determination process of step S11 is performed again. Execute.

  If it is not determined in the determination process of step S11 that the flasher driving condition is satisfied (“No” in the determination process of step S11), the control unit 60 performs a memory process as a determination process of subsequent step S15. By determining whether the ZPD flag stored in 61 is set or reset, it is determined whether the ZPD process has been executed.

  Here, when it is determined that the ZPD flag is set and the ZPD process has been executed (“Yes” in the determination process of step S15), the control unit 60 proceeds to the determination process of the previous step S11. The determination process in step S11 is executed again. On the other hand, if the ZPD flag is reset and it is not determined that the ZPD process has been executed in the determination process of step S15 ("No" in the determination process of step S15), the control unit 60 proceeds to step S16. As the process, a voltage detection type ZPD process is executed. When the voltage detection type ZPD process is executed, the control unit 60 proceeds to the determination process of the previous step S11 and executes the determination process of step S11 again.

In this way, when the control unit 60 controls the on / off of the flasher semiconductor switch 52 and the buzzer semiconductor switch 54 in order to blink the indicator 51 and to sound the buzzer 53 in conjunction with the blinking of the indicator 51. On the other hand, when the ZPD processing of the forced nulling method is executed and the on / off control of these semiconductor switches 52 and 54 is not controlled, the ZPD processing of the voltage detection method is executed. As a result, in a state where the induced voltage of the field windings 32 and 33 is unlikely to be affected by the induced noise generated by the on / off of the semiconductor switches 52 and 54, the voltage detection type ZPD process can be executed. The electrical angle corresponding to the stopper position detected by the ZPD process of the voltage detection method executed in the low state can be set as the zero point θ0. In a state where the induced voltage of the field windings 32 and 34 is highly likely to be affected by the induced noise generated by turning on and off the semiconductor switches 52 and 54, the forced nulling ZPD process is executed to set the zero point θ0. Since the on / off switching of the semiconductor switches 52 and 54 is controlled in conjunction with the ZPD processing of the forced nulling method, the user is distracted by the blinking of the indicator 51 and the sound of the buzzer 53. This makes it difficult to notice vibrations and abnormal sounds, and reduces the feeling of discomfort. Therefore, it is possible to reduce the occurrence of an inaccurate indication of the vehicle speed value and the user's uncomfortable feeling while integrating the system.
(Second Embodiment)
Next, a second embodiment of the meter system according to the present invention will be described with reference to FIGS. Since the second embodiment also has a configuration according to the first embodiment, only the parts different from the first embodiment will be described.

  In the first embodiment, immediately after the activation, the control unit 60 determines whether or not the flasher driving condition is satisfied (the determination process in step S11), and the voltage detection type ZPD process (step S16). The ZPD process of either the ZPD process of the forced nulling method (the process of step S14) or the ZPD process of the voltage detection system is being performed (during the process of step S16). In some cases, the flasher driving condition is satisfied and the semiconductor switches 52 and 54 are switched on and off. In this case, the voltage detection type ZPD process may not be executed in a state where the induced voltage of the field windings 32 and 33 is unlikely to be affected by the induced noise generated by turning on and off the semiconductor switches 52 and 54. There is also sex.

  Therefore, in the present embodiment, the control unit 60 executes the meter activation process S2 shown in FIG. 9 as a diagram corresponding to the meter activation process S1 shown in FIG. Hereinafter, only the part different from the meter activation process S1 in the meter activation process S2 will be described.

  When the control unit 60 executes / ends the voltage detection type ZPD process as the process of step S16, the control unit 60 performs the voltage detection type ZPD process (particularly the voltage detection type zero stopper position detection operation) as the determination process of step S27. It is determined whether or not the semiconductor switches 52 and 54 are switched on and off during the execution of the above.

  Here, if it is not determined that the on / off switching of the semiconductor switches 52 and 54 has been controlled during the voltage detection type ZPD process (“No” in the determination process of step S27), the control unit 60 performs the process of step S16. After setting the electrical angle corresponding to the detected stopper position as the zero point θ0, the process proceeds to the determination process in step S11, and the determination process in step S11 is executed again.

  On the other hand, if it is determined that the on / off switching of the semiconductor switches 52 and 54 has been controlled during the voltage detection type ZPD process (“Yes” in the determination process of step S27), the control unit 60 performs the forced process as the subsequent process of step S28. Zero-return type ZPD processing is executed. When this forced nulling ZPD process is executed, the control unit 60 sets the electrical angle corresponding to the stopper position detected by executing this forced nulling ZPD process as the zero point θ0, and then in step S11. The process proceeds to the determination process, and the determination process in step S11 is executed again.

  In this way, when the control unit 60 controls the on / off of the semiconductor switches 52 and 54 during the voltage detection type ZPD process through the processes of steps S27 and S28, the control unit 60 executes the voltage detection type ZPD process. Thus, without setting the electrical angle corresponding to the detected stopper position as a zero point, the ZPD process of the forced nulling method is executed after the ZPD process of the voltage detection method is completed. As a result, even when the on / off switching of the semiconductor switches 52 and 54 is controlled during the voltage detection type ZPD processing, it is possible to reduce the occurrence of an inaccurate indication of the vehicle speed value.

  FIG. 10 shows an operation example of the meter system 1 when the on / off switching of the semiconductor switch is not controlled during the voltage detection type ZPD processing.

  In this operation example, it is assumed that the control unit 60 is activated from the sleep state with the opening of the vehicle door, and starts executing the voltage detection ZPD process at time t10. In this operation example, since the hazard lamp switch was turned on after time t10, the control unit 60 controlled the on / off of the semiconductor switches 52 and 54, but the zero point stopper in the voltage detection type ZPD processing. Assume that the on / off control of the semiconductor switches 52 and 54 is not controlled while the position detection operation is being performed.

  Specifically, since the vehicle door has been opened before time t10, the control unit 60 starts from the sleep state at time t10 and starts executing the pointer raising operation in the voltage detection type ZPD process.

  When the control unit 60 starts executing the pointer swinging operation, the pointer 20 rotates in the zero-separation direction Y at a constant speed by an amount corresponding to a predetermined electrical angle (for example, “273 degrees”), and stops at time t12. Wait until time t14 when a predetermined time elapses. Incidentally, when the control unit 60 also controls other pointers (not shown), the predetermined time includes all other pointers and the plurality of pointers including the pointers 20 at a predetermined electrical angle from the time t12 when the pointer 20 is swung up and stopped. Is the time until a fixed time elapses after rotating in the zero-separating direction Y and stopping. The section in which the pointer 20 is swung up (from t10 to t12) and the section in which the pointer 20 is on standby (from t12 to t14) are defined as the swing-up section TU1.

  Next, at a time t14 when a predetermined time has elapsed from the time t12, the control unit 60 starts executing a zero point stopper position detection operation in the voltage detection type ZPD process. When the control unit 60 starts executing the voltage detection type zero-point stopper position detection operation, the pointer 20 rotates in the zero return direction X at a constant speed faster than the above-described pointer swing-up operation, and stops at the stopper position at time t15. To do. Note that the time t14 at which the zero point stopper position detection operation of the voltage detection method is started is set as the detection section start point, and the time t15 at which the pointer 20 stops at the stopper position is set as the stopper position detection point, from the detection section start point t14 to the stopper. A section up to the position detection point t15 is defined as a detection section TD1.

  Further, since the hazard lamp switch is turned on after time t10, the control unit 60 switches the semiconductor switches 52 and 54 from off to on at time t11, and turns on the semiconductor switches 52 and 54 at time t13. The semiconductor switches 52 and 54 are switched on and off after the time t13.

  Then, the control unit 60 determines whether or not the semiconductor switches 52 and 54 are switched on and off during the detection interval TD1 at time t15 when the zero point stopper position detection operation is completed in the ZPD processing of the voltage detection method. To do. Here, the control unit 60 determines that the on / off switching of the semiconductor switches 52 and 54 is not controlled during the detection interval TD1, and sets the electrical angle corresponding to the stopper position detected by the ZPD processing of this voltage detection method to the zero point. Set as θ0.

  FIG. 11 shows an example of the operation of the meter system 1 when the on / off switching of the semiconductor switch is controlled during the voltage detection type ZPD process.

  In this operation example, it is assumed that the control unit 60 is activated from the sleep state with the opening of the vehicle door, and starts executing the voltage detection type ZPD process at time t20. In this operation example, since the hazard lamp switch is turned on after time t20, the control unit 60 switches on / off of the semiconductor switches 52 and 54, and the zero point stopper position in the voltage detection type ZPD processing. It is assumed that the on / off control of the semiconductor switches 52 and 54 is controlled while the detection operation is being performed.

  Specifically, since the vehicle door has been opened before time t20, the control unit 60 starts from the sleep state at time t20 and starts executing the needle swinging operation in the voltage detection type ZPD process.

  When the control unit 60 starts executing the pointer swinging operation, the pointer 20 rotates in the zero-separation direction Y at a constant speed by an amount corresponding to a predetermined electrical angle (for example, “273 degrees”), and stops at time t22. Wait until time t23 when a predetermined time elapses. The section in which the pointer 20 is swung up (from t20 to t22) and the section in which the pointer 20 is on standby (from t22 to t23) are defined as the swing-up section TU2.

  Next, at a time t23 when a predetermined time has elapsed from the time t22, the control unit 60 starts executing a zero point stopper position detection operation in the voltage detection type ZPD process. When the control unit 60 starts executing the voltage detection type zero-point stopper position detection operation, the pointer 20 rotates in the zero return direction X at a constant speed faster than the above-described pointer swing-up operation, and stops at the stopper position at time t25. To do. It should be noted that the time t23 at which the voltage detection type zero stopper position detection operation is started is set as the detection section start point, and the time t25 at which the pointer 20 stops at the stopper position is set as the stopper position detection point, from the detection section start point t23 to the stopper. A section up to the position detection point t25 is defined as a detection section TD2.

  Further, since the hazard lamp switch is turned on after time t20, the control unit 60 switches the semiconductor switches 52 and 54 from off to on at time t21, and turns on the semiconductor switches 52 and 54 at time t24. From time t24, the semiconductor switches 52 and 54 are switched on and off after the time t24 (not shown in FIG. 11).

  Then, the control unit 60 determines whether or not the semiconductor switches 52 and 54 are switched on and off during the detection interval TD2 at the time t25 when the zero point stopper position detection operation is completed in the ZPD processing of the voltage detection method. To do. Here, the control unit 60 determines that the on / off switching of the semiconductor switches 52 and 54 has been controlled during the detection interval TD2, and corresponds to the stopper position detected by the ZPD processing of this voltage detection method (at time t25). The ZPD process of the forced nulling method is started without setting the electrical angle as the zero point θ0.

  The control unit 60 starts execution of the forced nulling-type ZPD process at time t25, so that the A-phase and B-phase driving signals that cause the pointer 20 to rotate in the nulling direction X by a predetermined nulling angle are step motors. Applied to M field windings 32 and 33. Since the voltage detection type ZPD processing is executed from time t20 to time t25 and the pointer 20 is almost at the stopper position, the pointer 20 is in the vicinity of the stopper position until time t26 at which the forced nulling type ZPD processing ends. Vibration and abnormal noise occur. Note that a section from time t25 to time t26 is defined as an execution section T3.

  Then, the control unit 60 sets the electrical angle corresponding to the detected lower stopper position (at time t26) as the zero point θ0 at time t26 when the forced nulling-type ZPD processing ends.

  As described with reference to FIGS. 10 and 11, the period for detecting the zero point stopper position detection operation of the voltage detection method (detection sections TD1 and TD2) is the period for executing the pointer swinging operation (lifting sections TU1 and TU2). ) Is often shorter. In the meter system 1, the ZPD process of the forced nulling method is executed only when the on / off switching of the semiconductor switches 52 and 54 is controlled in the short detection sections TD1 and TD2, and the semiconductor switch 52 is used in the long swing sections TU1 and TU2. For this reason, the ZPD process of the forced nulling method is not executed even if the on / off switching of the control units 54 and 54 is switched, so that the swing-up sections TU1 and TU2 can be used effectively.

  The meter system 1 according to the present invention is not limited to the configuration exemplified in the above embodiment, and can be implemented with various modifications without departing from the gist of the present invention. . In other words, for example, the following embodiment can be implemented by appropriately changing the above embodiment.

  In the meter system 1 of the above embodiment, both the field windings 32 and 33 and both the flasher semiconductor switch 52 and the buzzer semiconductor switch 54 are arranged on the same substrate 40 and have the same control. The unit 60 is configured to execute the ZPD processing and the on / off switching control of both the flasher semiconductor switch 52 and the buzzer semiconductor switch 54, but is not limited thereto. Although both the field windings 32 and 33 and both the flasher semiconductor switch 52 and the buzzer semiconductor switch 54 are arranged on the same substrate 40, the control unit for performing the ZPD processing, the semiconductor switch 52, The control unit that performs both on / off switching control of 54 may be a separate control device, and the same control unit 60 controls on / off switching of both the ZPD processing and the flasher semiconductor switch 52 and the buzzer semiconductor switch 54. However, both the field windings 32 and 33 and the flasher semiconductor switch 52 and the buzzer semiconductor switch 54 may not be arranged on the same substrate.

  The field windings 32 and 33 and both the flasher semiconductor switch 52 and the buzzer semiconductor switch 54 are not limited to be arranged on the same substrate 40, and either the field windings 32 or 33 are used. And only one of the flasher semiconductor switch 52 and the buzzer semiconductor switch 54 may be arranged on the same substrate 40.

  The control unit 60 may be configured to execute at least one of the ZPD processing and the on / off switching control of both the flasher semiconductor switch 52 and the buzzer semiconductor switch 54.

DESCRIPTION OF SYMBOLS 1 ... Meter system, 1a ... Indicator instrument for vehicles, 10 ... Instrument board, 10a ... Display board, 20 ... Pointer, 30 ... Turning inner machine, 30a ... Inner machine main body, 32, 33 ... Field winding, 40 ... Substrate, 50 ... flasher function unit, 51 ... indicator (flasher), 52 ... flasher semiconductor switch, 53 ... buzzer, 54 ... buzzer semiconductor switch, 60 ... control unit (control device), 61 ... memory, 71 ... door sensor, 71 ... Vehicle speed sensor, G ... reduction gear mechanism, M ... step motor, S ... stopper mechanism, X ... zero return direction, Y ... zero release direction, .theta.0 ... zero point

Claims (8)

A pointer that indicates the vehicle state value according to the rotation position by rotating along a display surface of a scale plate that displays the vehicle state value;
A step motor that rotationally drives the pointer by applying a drive signal alternating according to the electrical angle to the field winding;
A stopper mechanism that stops the pointer that rotates in the zero return direction from a zero position that indicates a zero value of the vehicle state value to a stopper position that is within a predetermined range in the zero return direction;
Based on the fact that a predetermined stopper position detection operation execution condition is satisfied, a pointer swinging operation is performed to control the drive signal so that the pointer rotates in a zero-zero direction that is opposite to the return-to-zero direction. Then, an induced voltage generated in the field winding is detected while controlling the drive signal so that the pointer rotates in the return-to-zero direction, and the pointer is moved to the stopper position using the detected induced voltage. Stopper position detection operation executing means for detecting the zero point stopper position detection operation of the voltage detection method for detecting the stop at the zero point, and an electrical angle corresponding to the stopper position detected by executing the zero point stopper position detection operation And zero point setting means for setting the driving signal based on the zero point set by the zero point setting means to the field winding. A dynamic control unit, provided with a indicating instrument for a vehicle having a,
A flasher semiconductor switch,
A flasher that blinks when on / off of the flasher semiconductor switch is controlled to be switched;
It is determined whether or not a predetermined flasher driving condition based on a manual operation by a user is satisfied, and when it is determined that the flasher driving condition is satisfied, the flasher is operated in a manner corresponding to the flasher driving condition determined to be satisfied. A flasher on / off switching control unit for switching on / off of the flasher semiconductor switch for blinking, a meter system including a flasher function unit,
The flasher semiconductor switch and the field winding are arranged close to each other,
The stopper position detection operation execution means not only can execute the pointer swing-up operation and the zero-point stopper position detection operation of the voltage detection method, but also rotates the pointer in the return-zero direction by a predetermined return-zero angle. In addition, by controlling the drive signal applied to the field winding of the stepper motor, it is possible to execute a zero point stopper position detection operation of a forced nulling method in which the pointer is stopped at the stopper position.
If the on / off control of the flasher semiconductor switch is controlled so as to cause the flasher to blink when the stopper position detection operation execution condition is satisfied, the drive control unit performs the zero return stopper of the forced nulling method. A meter that performs a position detection operation and performs a zero point stopper position detection operation of the voltage detection method when the on / off control of the flasher semiconductor switch is not controlled to blink the flasher. system. The meter system according to claim 1,
When the on / off control of the flasher semiconductor switch is controlled so as to blink the flasher while performing the zero point stopper position detection operation of the voltage detection method, the drive control unit Without setting the electrical angle corresponding to the stopper position detected by executing the zero stopper position detection operation as the zero point, after the zero stopper position detection operation of the voltage detection method is completed, the zero point stopper position of the forced return zero method A meter system that performs a detection operation. The meter system according to claim 1 or 2,
The meter system, wherein the flasher semiconductor switch and the field winding of the step motor are arranged on the same substrate. In the meter system according to any one of claims 1 to 3,
The drive system and the flasher on / off switching control unit are configured by the same control device. A pointer that indicates the vehicle state value according to the rotation position by rotating along a display surface of a scale plate that displays the vehicle state value;
A step motor that rotationally drives the pointer by applying a drive signal alternating according to the electrical angle to the field winding;
A stopper mechanism that stops the pointer that rotates in the zero return direction from a zero position that indicates a zero value of the vehicle state value to a stopper position that is within a predetermined range in the zero return direction;
Based on the fact that a predetermined stopper position detection operation execution condition is satisfied, a pointer swinging operation is performed to control the drive signal so that the pointer rotates in a zero-zero direction that is opposite to the return-to-zero direction. Then, an induced voltage generated in the field winding is detected while controlling the drive signal so that the pointer rotates in the return-to-zero direction, and the pointer is moved to the stopper position using the detected induced voltage. Stopper position detection operation executing means for detecting the zero point stopper position detection operation of the voltage detection method for detecting the stop at the zero point, and an electrical angle corresponding to the stopper position detected by executing the zero point stopper position detection operation And zero point setting means for setting the driving signal based on the zero point set by the zero point setting means to the field winding. A dynamic control unit, provided with a indicating instrument for a vehicle having a,
A flasher semiconductor switch,
A flasher that blinks when on / off of the flasher semiconductor switch is controlled to be switched;
It is determined whether or not a predetermined flasher driving condition based on a manual operation by a user is satisfied, and when it is determined that the flasher driving condition is satisfied, the flasher is operated in a manner corresponding to the flasher driving condition determined to be satisfied. A flasher on / off switching control unit for controlling on / off of the flasher semiconductor switch to blink
Buzzer semiconductor switch,
A buzzer that blows by turning on and off the buzzer semiconductor switch,
A buzzer on / off switching control unit for switching on / off of the buzzer semiconductor switch in conjunction with on / off of the flasher semiconductor switch, and a meter system comprising a flasher function unit,
At least one of the flasher semiconductor switch and the buzzer semiconductor switch and the field winding are arranged in close proximity,
The stopper position detection operation execution means not only can execute the pointer swing-up operation and the zero-point stopper position detection operation of the voltage detection method, but also rotates the pointer in the return-zero direction by a predetermined return-zero angle. In addition, by controlling the drive signal applied to the field winding of the stepper motor, it is possible to execute a zero point stopper position detection operation of a forced nulling method in which the pointer is stopped at the stopper position.
The drive control unit is in a state of being close to the field winding of the flasher semiconductor switch and the buzzer semiconductor switch to operate the flasher or the buzzer when the stopper position detection operation execution condition is satisfied. When the ON / OFF of the arranged semiconductor switch is controlled to be switched, the zero-stopper position detecting operation of the forced nulling method is executed, while the flasher semiconductor switch and the buzzer are operated to operate the flasher or the buzzer. A meter that performs zero-point stopper position detection operation of the voltage detection method when switching on / off of a semiconductor switch arranged in the state of being close to the field winding among the semiconductor switches is not controlled. system. The meter system according to claim 5,
The drive control unit includes the field winding of the flasher semiconductor switch and the buzzer semiconductor switch to operate the flasher or the buzzer while performing the zero point stopper position detection operation of the voltage detection method. When the on / off switching of the semiconductor switch arranged in the vicinity of the switch is controlled, the electric angle corresponding to the detected stopper position is set as the zero point by executing the zero point stopper position detecting operation of the voltage detection method. The meter system is characterized in that, after the voltage detection type zero stopper position detection operation is completed, the forced nulling type zero stopper position detection operation is executed. The meter system according to claim 5 or 6,
The meter system, wherein at least one of the flasher semiconductor switch and the buzzer semiconductor switch and the field winding of the step motor are arranged on the same substrate. In the meter system according to any one of claims 5 to 7,
The meter system, wherein the drive control unit and at least one of the flasher on / off switching control unit and the buzzer on / off switching control unit are configured by the same control device.

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