JP2004067075A - Grip heater control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grip heater control device capable of easy visual recognition of results of energization control commands with tactility in an energization control command operation to a heater. <P>SOLUTION: This grip heater control device 10 controls energization from a battery 11 to a heater 15 built in a grip installed to a steering handle. In this device, light-on numbers of light emitting diodes LED1-LED4 substantially arranged in line are controlled on the basis of the ON number of times of an up switch SW1, and light-off numbers of the light emitting diodes LED1-LED4 are controlled on the basis of the ON number of times of a down switch SW2, so as to control a number of light emitting diodes to be lit on, and control on/off of a switching circuit 14 at an energization rate defined according to the number of the light emitting diodes to be lit on. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a grip heater control device, and more particularly, to a grip heater control device that controls a grip heater provided on a steering handle of a motorcycle, a snowmobile, a personal watercraft, or the like.
[0002]
[Prior art]
Conventionally, in vehicles such as motorcycles and snowmobiles, a heater is provided on the grip to keep the grip provided on the steering wheel, and the grip is heated by controlling the energization of the heater, so that the driver can be heated. Provides a comfortable driving environment.
[0003]
Such a vehicle grip heater control device is already known, for example, from Patent Documents 1 and 2.
[0004]
A conventional vehicle grip heater control device uses an output voltage from a potentiometer as a comparison voltage in order to adjust energization of the heater by operating a potentiometer integrally formed with a power switch, and the comparison voltage and a predetermined periodic voltage. The switching circuit is turned on and off by a PWM output generated by comparing the level with a wave, for example, a triangular wave, and the heater is heated by controlling the energization from the battery to the heater by the switching circuit. .
[0005]
On the other hand, the grip heater control is incidental to the vehicle, and when the battery voltage falls below the minimum voltage for driving the starter motor to prioritize the running of the vehicle, the battery from the heater to the heater is controlled. It is necessary to stop the power supply. Therefore, when the battery voltage is detected and the battery voltage approaches the minimum voltage required for driving the starter motor, the switching circuit is forcibly controlled to the OFF state regardless of the value of the comparison voltage. A circuit is provided, and a fail-safe circuit is provided for forcibly controlling the switching circuit to an off state when the comparison voltage becomes unstable.
[0006]
Further, in the battery voltage monitoring circuit, when the voltage value based on the battery voltage supplied to the battery voltage monitoring circuit is less than the first voltage threshold VS1, the switching circuit is controlled to be in the power-supply prohibited state and is supplied to the battery voltage monitoring circuit. When the voltage value based on the battery voltage is larger than the second voltage threshold VS2 (VS2> VS1), the switching circuit is controlled to be in the energizable state.
[0007]
In this case, the minimum voltage value required by the battery is V _N When the voltage drop due to the wiring resistance between the battery and the battery voltage monitoring circuit is Δv1, and the maximum detection error voltage assumed in the battery voltage monitoring circuit is Δv2, the first voltage threshold VS1 is VS1 = V _N Hysteresis between the first voltage threshold VS1 and the second voltage threshold VS2 is provided by setting -.DELTA.v1 + .DELTA.v2. When the battery voltage drops, the power supply is prohibited when the battery voltage falls below the first voltage threshold VS1, and when the battery voltage rises, the second voltage threshold is applied. When the voltage becomes equal to or higher than the voltage threshold VS2, the power supply is set to the power supply enabled state, so that frequent repetition of power supply inhibition and power supply prevention is prevented, and the battery minimum voltage is maintained.
[0008]
[Patent Document 1]
JP-A-10-79284
[Patent Document 2]
Japanese Patent No. 3231247
[0009]
[Problems to be solved by the invention]
However, when using the conventional vehicle grip heater control device, there is a problem that there is no click feeling in the operation of the potentiometer for instructing the energization adjustment, and the driver cannot easily recognize the adjustment designation result.
[0010]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a grip heater control device that has a feeling of operation in energization adjustment instruction operation for a heater and allows the user to easily visually recognize the energization adjustment instruction result.
[0011]
[Means for Solving the Problems]
The grip heater control device according to the present invention is a grip heater control device including a switching unit that turns on / off power supply from a battery to a grip heater provided on a steering handle.
A lighting light emitting diode that controls the number of light emitting diodes among a plurality of light emitting diodes based on the number of times the up switch means is turned on, and controls the number of light emitting diodes by controlling the number of light emitting diodes based on the number of times the down switch means is turned on. Number control means;
Switching control means for controlling the switching means to a duty ratio determined according to the number of light emitting diodes,
It is characterized by having.
[0012]
According to the grip heater control device of the present invention, the number of light emitting diodes is determined under the control of the number of light emitting diodes control means based on the number of times the up switch means and the number of times the down switch means are turned on. Therefore, the ON operation of the up switch means and the ON operation of the down switch have an operational feeling, and the energization adjustment instruction specified by the operation of the up switch and the down switch can be easily visually recognized from the number of light emitting diodes. Further, since the duty ratio for the heater corresponds to the number of light emitting diodes, the heater temperature based on the control can be easily predicted. In this case, for example, if the light emitting diodes are provided in a line, the number of lighted light emitting diodes can be easily recognized.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
A grip heater control device according to the present invention will be described with reference to an embodiment. FIG. 1 is a block diagram showing a configuration of an embodiment of a grip heater control device according to the present invention, and FIG. 2 is a block diagram showing functions of a control circuit in an embodiment of the grip heater control device according to the present invention. FIG. 3 is an installation explanatory view of the grip heater control device according to the embodiment of the present invention.
[0014]
As shown in FIG. 3, a front fork 25 composed of a pair of pipes for suspending a front wheel (not shown) is provided at a front end of a body frame of the motorcycle, and an upper end of the front fork 25 steers the front wheel. Cylindrical steering handle 27 is provided so as to separately extend left and right via a steering stem. A left grip 17 made of rubber or the like is attached to the left end of the steering handle 27. Similarly, a right grip made of rubber or the like is attached to the right end of a steering handle (not shown).
[0015]
Further, a cowling 29 made of a resin material is mounted integrally with the vehicle body outside the vehicle body, and the cowling 29 reduces air resistance during traveling. The cowling 29 includes a left cowling 24 provided on the left side of the vehicle body and a right cowling (not shown) provided on the right side of the vehicle body.
[0016]
The grip heater control device 10 displays a heater 15 made of a flexible printed circuit board or the like built in the left grip 17 and a right grip (not shown), and displays a setting state of the heater 15 and sets a current amount to the heater 15. And a switch unit 16.
[0017]
As shown in FIG. 3, the switch unit 16 is buried in the left cowling 24, and the upper part thereof slightly protrudes from the surface of the left cowling 24.
[0018]
As shown in FIG. 1, the grip heater control device 10 divides a battery voltage supplied from a battery 11 mounted on a motorcycle via a main switch 23 by a battery voltage dividing circuit 12, and The circuit 12 outputs the divided voltage Vb based on the battery voltage. On the other hand, the voltage from the battery 11 via the main switch 23 is supplied to the constant voltage circuit 13 to make it a constant voltage. _DD Output. On the other hand, the battery voltage supplied via the main switch 23 is switched by the switching circuit 14, and by this switching, the energization of the heater 15 from the battery 11 and the interruption of the energization are controlled to control the heat generation amount of the heater 15. .
[0019]
The battery voltage dividing circuit 12 divides the battery voltage by the resistors R1, R2 and the variable resistor VR connected in series, and outputs a divided voltage Vb via the resistor R3. Here, the capacitor C1 is a smoothing capacitor, and the diode D1 is a constant voltage V _DD This is a diode for preventing a backflow from flowing from the capacitor and for forming a discharge path of the capacitor C1. ZD1 is a Zener diode for limiting the upper limit voltage, and limits the upper limit voltage of the divided voltage Vb to the Zener voltage.
[0020]
The constant voltage circuit 13 converts the battery voltage rectified by the diode D2 and smoothed by the capacitor C2 into a constant voltage V2 in addition to the rectifying diode D2 and the smoothing capacitor C2. _DD And a capacitor C3 for smoothing the output of the three-terminal regulator 131. Constant voltage V _DD Are used as power supplies for the switch unit 16, control circuit 18, light emitting diode unit (also referred to as LED unit) 19, EEPROM 20, and watchdog circuit (WD) 21 provided in the grip heater control device 10.
[0021]
The switching circuit 14 receives a voltage obtained by rectifying the battery voltage supplied from the battery 11 via the main switch 23 by the diode D2 and smoothing the battery voltage by the capacitor C2, and is controlled on / off by an output from the terminal OUT0 of the control circuit 18. A transistor Q1 that forms a preamplifier, a transistor Q2 that forms a driver that is turned on and off by the collector output of the transistor Q1, and a power transistor Q3 that is turned on and off by the transistor Q2. The power supply from the battery 11 to the heaters 151 and 152 which are separately provided on the handles of the heater 15 and are connected in series to constitute the heater 15 is controlled on / off by the power transistor Q3.
[0022]
Here, the resistors R6 and R7 in the switching circuit 14 are bias resistors of the transistor Q1. The resistors R4 and R5 are collector load resistors of the transistor Q1, and the capacitor C4 is a smoothing capacitor. The resistors R8 and R9 are bias resistors of the transistor Q3, and the output of the transistor Q2 drives the output transistor Q3 on / off. The Zener diode ZD2 is a Zener diode for limiting voltage, and the Zener diode ZD3 is a surge absorber.
[0023]
Therefore, while the terminal OUT0 of the control circuit 18 is at a high potential, the transistors Q1 to Q3 are controlled to be in an ON state, and the heater 15 is energized from the battery 11 via the main switch 23. While the terminal OUT0 of the control circuit 18 is at a low potential, the transistors Q1 to Q3 are controlled to be in an off state, and the power supply to the heater 15 is cut off.
[0024]
The switch unit 16 has a constant voltage V _DD Is output to the control circuit 18 when it is pulled up and pressed, and an up switch SW1 for instructing an increase in the energizing period to the heater 15 and a constant voltage V by a resistor R11. _DD And a down switch SW2 for sending an output when the signal is pulled up and pressed to the control circuit 18 and instructing the heater 15 to reduce the power supply period.
[0025]
The light-emitting diode unit 19 includes light-emitting diodes LED1 to LED4 that are controlled to be turned on and off by the outputs from the terminals OUT1 to OUT4 of the control circuit 18, and the light-emitting diodes LED1 to LED4 are adjacent to each other, substantially in a line, and integrally. It is arranged.
[0026]
By driving the light emitting diodes LED4, LED3, LED2, and LED1, the energization period is sequentially instructed to increase in the order of lighting only the light emitting diode LED4, lighting the light emitting diodes LED4 and LED3,. To indicate that The resistors R12 to R15 in the light emitting diode unit 19 are current limiting resistors for the light emitting diodes LED1 to LED4.
[0027]
The EEPROM 20 is a storage device that receives and outputs an output from the control circuit 18 and stores and updates a count value of a stage counter described later. The stored content is used as an initial value of the count value of the stage counter at the time of restart. use.
[0028]
The watchdog circuit 21 detects whether or not the control circuit 18 is malfunctioning by looking at the output potential (high potential / low potential) from the terminal PO1 of the control circuit 18 output from the operating control circuit 18, and When is not normal, the operation of the control circuit 18 is initialized by resetting the control circuit 18.
[0029]
The control circuit 18 is composed of a computer that operates by receiving the oscillation output from the crystal oscillator 31. Basically, the control circuit 18 receives the output from the up switch SW1 and the down switch SW2 and determines whether or not the switch has been pressed for a predetermined period. Switch output processing means 180 for performing switch processing such as determination when both the switch SW1 and the down switch SW2 are pressed, receives the divided voltage Vb, detects the battery voltage, and the battery voltage is necessary for driving the starter motor. Battery voltage detection determining means 181 for determining whether or not the minimum voltage value is exceeded (see FIG. 2).
[0030]
Further, the control circuit 18 basically determines the ON period and the number of ON times of the up switch SW1 and the ON period and the number of ON times of the down switch SW2 in response to the outputs from the up switch SW1 and the down switch SW2. Based on the outputs from the up / down instruction period determining unit 182, the up / down instruction period determining unit 182, and the battery voltage detection determining unit 181, energization to the heater 15 and energization duty ratio setting unit 183 for substantially setting the duty ratio thereof. And a pulse generating means 185 for generating a pulse for controlling the control circuit 18 from the terminal PO1 to indicate whether the control circuit 18 is normal or abnormal.
[0031]
Further, the battery voltage detection determination means 181 averages the corrected battery voltage obtained by adding the voltage drop generated when the wiring 22 connecting the heater 15 and the battery 11 is energized to the battery voltage detected every time the battery voltage is detected. Means for determining the battery voltage.
[0032]
More specifically, the up / down instruction period determining means 182 controls the number of light emitting diodes based on the number of times the up switch SW1 is turned on and controls the number of light emitting diodes based on the number of times the down switch SW2 is turned on. Means for controlling the number.
[0033]
The energization duty ratio setting means 183 sets (1) a threshold obtained by adding a predetermined voltage to a lower limit setting threshold for prohibiting energization to the heater 15 as an upper limit setting threshold, and after the battery voltage reaches the upper limit setting threshold, Means for controlling on / off of the switching circuit 14 to a duty ratio determined by means for controlling the number of light emitting diodes until the lower limit setting threshold is reached; and (2) an upper limit setting threshold first from the time of battery voltage application. After a predetermined period of time, the number of light emitting diodes controlled by the means for controlling the number of lighting light emitting diodes is turned on, and after the predetermined period elapses, the battery voltage reaches an upper limit setting threshold and then reaches a lower limit. During a period until the set threshold value is reached, the number of light emitting diodes determined by the means for controlling the number of light emitting diodes is controlled to be lit, and the battery power is controlled. Means for controlling to turn off all the light emitting diodes during the period from when the threshold value is less than the lower limit setting threshold to the next upper limit setting threshold, and (3) a predetermined voltage is applied to the lower limit setting threshold for prohibiting the energization of the heater 15. With the threshold value as the upper limit setting threshold, during the period from the time when the average correction battery voltage to be described later reaches the next upper limit setting threshold to the time when the average correction battery voltage reaches the upper limit setting threshold, the energization of the heater 15 by the switching circuit 14 is prohibited, and the average correction battery voltage becomes During the period from when the upper limit setting threshold is reached to when the next lower limit setting threshold is reached, an energization enable / disable control unit that enables the switching circuit 14 to energize the heater 15 is included.
[0034]
Here, the up / down instruction period determination unit 182 and the energization duty ratio setting unit 183 substantially function as the PWM unit 184.
[0035]
Next, the operation of the grip heater control device 10 will be described based on the flowcharts shown in FIGS.
[0036]
FIG. 4 shows a general flowchart of the grip heater control device 10.
[0037]
When the operation of the grip heater control device 10 is started, the count value of the stage counter written in the EEPROM 20 at the end of the previous operation, that is, the driving state of the grip heater, is read, the time of the interrupt timer is set, and the flag is set. Initial settings such as setting or clearing of classes are made (step S1). Here, the time of the interrupt timer is set to, for example, 10 ms.
[0038]
Subsequent to the initial setting in step S1, it is checked whether an interrupt flag based on an interrupt timer is set (step S2). Here, an interrupt flag is set, for example, every 10 ms.
[0039]
If it is determined in step S2 that the interrupt flag has not been set, the control circuit determination processing routine is executed (step S3), and the process is executed again from step S2.
[0040]
In the control circuit determination processing routine, the watchdog circuit 21 receives an output from the terminal PO1 of the control circuit 18, and outputs a high potential and a low potential alternately and continuously from the terminal PO1. Is determined to be normal. Specifically, as shown in FIG. 5, the count value of the internal counter is cleared (step S31), and the counting of the internal counter is started (step S32). Subsequent to step S32, it is checked whether or not the count value of the internal counter has reached 10, and waits until the count reaches 10 (step S33). If the count has reached 10 in step S33, it is checked after step S33 whether the output of the terminal PO1 of the control circuit 18 is at a high potential (HIGH) (step S34). If it is determined in step S33 that the output of the terminal PO1 is at a high potential, the output of the terminal PO1 is set to a low potential (LOW) (step S35). If it is determined in step S33 that the output of the terminal PO1 has a low potential, the output of the terminal PO1 is set to a high potential (step S36). By executing steps S35 and S36, the control circuit determination processing routine ends.
[0041]
Here, in step S33, for example, if the increment of the internal counter is performed every 0.1 ms, the 10 count is 1 ms, and when the control circuit 18 is normal, steps S35 and S36 are performed every 1 ms. Repeatedly, a high potential of 1 ms and a low potential of 1 ms are alternately output from the terminal PO1 of the control circuit 18. When the control circuit 18 is not normal, the execution of step S35 or step S36 is continued for more than 1 ms, and the high potential or low potential output from the terminal PO1 of the control circuit 18 is output for a predetermined processing time (steps S4 to S11 described later). , S14, S15 and the processing time of step S3).
[0042]
As described above, when the output from the terminal PO1 of the control circuit 18 receives the output of the high potential and the low potential alternately and continuously, the watchdog circuit 21 determines that the control circuit 18 is normal. I do. When the high-potential or low-potential output is continuously transmitted from the terminal PO1 of the control circuit 18 for the predetermined processing time or longer, the watchdog circuit 21 determines that the watchdog circuit 21 is not normal. Then, a reset output is sent to the reset terminal of the control circuit 18, and the control circuit 18 resets.
[0043]
If the interrupt flag is set in step S2, the interrupt flag is cleared following step S2 (step S4). Subsequent to step S4, an up switch ON determination processing routine is executed (step S5). In the up switch on determination processing routine, it is determined whether or not the up switch SW1 has been turned on for a predetermined period or more, for example, 30 ms or more when the battery voltage is equal to or higher than a predetermined voltage. When it is determined that the up switch SW1 has been turned on for a predetermined period or more when the battery voltage is equal to or higher than the predetermined voltage, it is determined that the up switch SW1 has been turned on. The switch-on flag is set. As described above, the up switch on determination processing routine is a routine for determining whether the up switch SW1 is on. Even if the up switch SW1 is turned on when the battery voltage is lower than the predetermined voltage, the up switch SW1 The operation of the up switch SW1 is also invalidated when it is determined that the switch SW1 has been turned on for less than a predetermined period.
[0044]
Subsequent to step S5, a down switch ON determination processing routine is executed (step S6). In the down switch ON determination processing routine, when the battery voltage is equal to or higher than a predetermined voltage, it is determined whether the down switch SW2 has been turned on for a predetermined time or more, for example, 30 ms or more. When it is determined that the down switch SW2 has been turned on for a predetermined period or more when the battery voltage is equal to or higher than the predetermined voltage, it is determined that the down switch SW2 has been turned on. The down switch on flag is set. As described above, the down switch on determination processing routine is a routine for determining whether the down switch SW2 is turned on. When the battery voltage is lower than a predetermined voltage, the down switch SW2 is turned on, Even when it is determined that the switch SW2 has been turned on for less than the predetermined period, the operation of the down switch SW2 is invalidated.
[0045]
Subsequent to step S6, a switch state determination processing routine is executed (step S7). In the switch state determination processing routine, the set state of the up switch on flag and the set state of the down switch on flag are checked, and when the up switch SW1 and the down switch SW2 are simultaneously pressed, that is, the up switch on flag When both the down switch on flag and the down switch on flag are set, both switch on flags are set. When only one of the up switch on flag and the down switch on flag is set, and when neither the up switch on flag nor the down switch on flag is set, both switch on flags are cleared.
[0046]
As described above, by executing steps S5 to S7, when only the up switch SW1 is turned on for a predetermined period or more when the battery voltage is higher than a predetermined voltage, the up switch SW1 is turned on. When it is determined that the down switch SW2 has been turned on and only the down switch SW2 has a battery voltage equal to or higher than a predetermined voltage, and when the down switch SW2 has been turned on for a predetermined period or more, it is determined that the down switch SW2 has been turned on. Is done.
[0047]
Subsequent to step S7, an up output determination processing routine is executed (step S8). When entering the up output determination processing routine, as shown in FIG. 6, it is checked whether or not both switch-on flags are cleared (step S81). If it is determined in step S81 that both switch-on flags have not been cleared, the up output determination processing routine ends.
[0048]
If it is determined in step S81 that both switch-on flags have been cleared, it is checked after step S81 whether the up-switch-on flag has been set (step S82).
[0049]
If it is determined in step S82 that the up switch on flag is set, the up output determination time counter is incremented (step S83), and it is checked whether the up output determination time, for example, 130 ms has elapsed (step S84). ). If it is determined in step S84 that the up output determination time has not elapsed, the up output determination processing routine ends.
[0050]
If it is determined in step S84 that the up output determination time has elapsed, it is checked whether the push-release flag has been cleared (step S85). If it is determined that the push-release flag has been cleared, the stage counter has been cleared. It is checked whether or not the count value of (STCNT) is less than 4 (step S86). If it is determined in step S86 that the count value is less than 4, the stage counter (STCNT) is incremented (step S87). Here, the count value of the stage counter indicates the number of light emitting diodes to be turned on.
[0051]
When it is determined in step S86 that the count value is not less than 4, the count value is set to 4 when the count value of the stage counter is 5 or more (step S88). Here, whether the count value of the stage counter is less than 4 is because the number of light emitting diodes is four from the light emitting diodes LED1 to LED4, and when the count value of the stage counter is 5 or more, The reason for setting to 4 is the same for the same reason.
[0052]
Following steps S87 and S88, a push-release flag is set (step S901). Subsequent to step S901, the up output determination time counter is cleared (step S90), and the up output determination processing routine ends. If it is determined in step S85 that the release flag has not been cleared, the process is executed from step S90.
[0053]
If it is determined in step S82 that the up-switch-on flag has not been set, the push-release flag is cleared following step S82 (step S89), and the process is executed from step S90. When both switch-on flags are not cleared in step S81, it means that the up switch SW1 and the down switch SW2 are turned on at the same time, and the up output determination processing routine ends.
[0054]
As described above, in the up output determination processing routine (step S8), when the up switch SW1 is released, the release flag is set to prevent the release. When the up switch SW1 is not pressed and released, that is, when the release flag is cleared, the on time of the up switch SW1 is counted by the up output determination time counter, and the up switch SW1 is turned on once after the output determination time elapses. Each time, the count value of the stage counter is sequentially incremented. As described above, in the up output determination processing routine (step S8), when the up switch SW1 is turned on for the output determination time or longer, it is determined that the up switch SW1 has been turned on once, and the up switch SW1 has been turned on. Each time, the count value of the stage counter is incremented.
[0055]
Subsequent to step S8, a down output determination processing routine is executed (step S9). When entering the down output determination processing routine, as shown in FIG. 7, it is checked whether both switch-on flags are cleared as in step S81 (step S91). If it is determined in step S91 that both switch-on flags have not been cleared, the down output determination processing routine ends.
[0056]
If it is determined in step S91 that both switch-on flags have been cleared, it is checked after step S91 whether a down switch-on flag has been set (step S92).
[0057]
If it is determined in step S92 that the down switch ON flag is set, the down output determination time counter is incremented (step S93), and it is checked whether the down output determination time has elapsed (step S94). If it is determined in step S94 that the down output determination time has not elapsed, the down output determination processing routine ends.
[0058]
If it is determined in step S94 that the down output determination time has elapsed, it is checked whether the push-release flag has been cleared (step S95). If it is determined in step S95 that the release flag has been cleared, it is checked whether the count value of the stage counter is not 0 (step S96). When it is determined in step S96 that the count value of the stage counter is not 0, the count value of the stage counter is decremented (step S97).
[0059]
Subsequent to step S97, the down output determination time counter is cleared (step S98), and the down output determination processing routine ends. If it is determined in step S96 that the count value of the stage counter is 0, step S97 is skipped and step S98 is performed. If it is determined in step S95 that the release flag has not been cleared, step S96 and step S97 are skipped, and step S98 is executed.
[0060]
If it is determined in step S92 that the down switch on flag has not been set, the release flag is cleared (step S99), and step S98 is executed.
[0061]
As described above, in the down output determination processing routine (step S9), when the down switch SW2 is depressed, the depressed flag is set, and the depressed release is prevented. When the down switch SW2 is not pressed and released, that is, when the release flag is cleared, the on time of the down switch SW2 is counted by the down output determination time counter, and each time the down switch SW2 is turned on once the output determination time elapses. Then, the count value of the stage counter is sequentially decremented. As described above, in the down output determination processing routine (step S9), when the down switch SW2 is turned on for the output determination time or longer, it is determined that the down switch SW2 has been turned on once, and the down switch SW2 has been turned on. Each time, the count value of the stage counter is decremented.
[0062]
Here, as is clear from the LED lighting control processing routine (step S11) and the switching circuit control processing routine (step S14) described later, the stage counter determines the number of lighted LEDs and the number of lighted LEDs based on the count value. This is a counter for controlling and controlling the power supply ON / OFF period of the heater 15 by the switching circuit 14.
[0063]
Subsequent to step S9, a battery voltage detection processing routine is executed (step S10). When entering the battery voltage detection processing routine, as shown in FIG. 8, the divided voltage Vb obtained by A / D conversion based on the battery voltage (hereinafter, in the step S10 and its related description, unless the confusion occurs, the battery voltage Is read (step S101), and it is checked after step S101 whether the energization flag is set (step S102).
[0064]
A correction voltage value for compensating for a voltage drop due to the wiring 22 connecting the heater 15, the battery 11, and the grip heater control device 10 due to energization is obtained in advance by actual measurement. In the grip heater control device 10, this measured value is 0.7 V, but this value varies depending on the type of electric wire, the current flowing, and the like, and the type of vehicle. The correction voltage value is converted to a correction voltage value based on the voltage division ratio of the voltage division circuit 12 (hereinafter, also referred to as a correction voltage value or simply a correction value unless confusion occurs in step S10 and the related description), and, for example, the control circuit 18 Is stored in a built-in ROM.
[0065]
If it is determined in step S102 that the energization flag is set, the correction value is read from the ROM built in the control circuit 18 (step S103), and the read correction value and the A / D-converted voltage division The voltage Vb is added to obtain a corrected battery voltage (step S104). The output voltage of the battery 11 at the terminal position of the battery 11 is substantially detected by the addition processing in step S104.
[0066]
Subsequent to step S104, the corrected battery voltage is added to the accumulated value of the corrected battery voltage obtained in the previous processing (step S105). If it is determined in step S102 that the energization flag is not set, steps S103 and S104 are skipped, and steps S102 to S105 are executed. Subsequent to step S105, the count value of the A / D counter indicating the number of times of accumulation is incremented (step S106). Next, it is checked whether the count value of the A / D counter is a predetermined value, for example, 16 (step S107). When it is determined in step S107 that the count value of the A / D counter is not the predetermined value, the battery voltage detection processing routine ends.
[0067]
When it is determined in step S107 that the count value of the A / D counter is a predetermined value, a battery voltage flag indicating whether or not the battery voltage is greater than a set value described later is set subsequent to step S107. It is checked whether or not it has been performed (step S108).
[0068]
If it is determined in step S108 that the battery voltage flag is set, the lower limit setting threshold value (= set value) of the battery voltage for prohibiting power supply to the heater 15 and stored in the built-in ROM is determined in advance. It is read (step S109). Here, the lower limit setting threshold value is a value obtained by dividing the minimum voltage value required for the battery 11 based on the voltage dividing ratio of the voltage dividing circuit 12. When it is determined in step S108 that the battery voltage flag has not been set, the voltage set as the hysteresis is added to the lower limit setting threshold following step S108, and the upper limit of the battery voltage previously stored in the internal ROM is set. The threshold value (set value) is read (step S1010). Here, the upper limit setting threshold is also a value obtained by dividing the voltage based on the voltage dividing ratio of the voltage dividing circuit 12. For example, a value obtained by dividing 0.5 V based on the voltage dividing ratio of the voltage dividing circuit 12 is used as a hysteresis voltage. The upper limit setting threshold is added to the lower limit setting threshold.
[0069]
Subsequent to the execution of steps S109 and S1010, it is determined whether or not a predetermined accumulated value of the battery voltage to which the correction value has been added, for example, an average corrected battery voltage obtained by averaging 16 accumulated values is larger than a set value. The battery voltage flag is set (step S1011). If it is determined in step S1011 that the battery voltage is large, the battery voltage flag is set (step S1012). Then, the count value and the accumulated value of the A / D counter are cleared (step S1014). The voltage detection processing routine ends. If it is not determined in step S1011, the battery voltage flag is cleared (step S1013), the count value and the accumulated value of the A / D counter are cleared (step S1014), and the battery voltage detection processing routine ends. .
[0070]
In the above, steps S105 to S107 are executed to accumulate the divided voltage Vb to which the correction voltage value has been added a predetermined number of times, for example, 16 times. In step S1010, the average value of the accumulated value is taken to obtain the average correction battery. The reason for obtaining the voltage and comparing the average corrected battery voltage with the set value is to obtain the output voltage at the terminal position of the battery 11 more accurately by obtaining the average corrected battery voltage while reducing the influence of noise. It is.
[0071]
In the above-described battery voltage detection processing routine (step S10), the battery voltage flag is not set at the beginning of the application of the voltage of the battery 11, and step S1010 is executed following step S108, and the battery voltage flag is cleared in step S1013. Also, at the beginning of the application of the voltage of the battery 11, the battery voltage is not yet stable, the battery voltage is lower than the upper limit setting threshold read in step S1010, the battery voltage flag is cleared in step S1013, and the The calculated value is cleared (steps S1010, S1013, S1014). When the execution of this step continues and the battery voltage increases above the upper limit setting threshold, the battery voltage flag is set in step S1012.
[0072]
Since the battery voltage flag is set in the execution of this step, in the execution from the next step S108, step S109 is executed following step S108, and the lower limit setting threshold read out in step S109 is set in step S1010. The setting of the battery voltage flag is continued until the battery voltage falls to the lower limit setting threshold. When the battery voltage falls to the lower limit setting threshold, steps S1010 to S1013 are executed, and the battery voltage flag is set. The flag is cleared.
[0073]
As a result, the battery voltage flag corresponds to the set values having the hysteresis (lower limit setting threshold and upper limit setting threshold), and as shown schematically in FIG. Done. FIG. 14A shows a change in battery voltage, and FIG. 14B shows a state in which a battery voltage flag is set and cleared.
[0074]
As described above, only when the energization flag is set, the correction value which is a voltage drop due to the resistance of the wiring 22 when energizing the heater 15 is added to the detected battery voltage. Will be compensated for by the voltage drop due to the resistance. Further, since the accumulated value of the predetermined number of times is used, noise at the time of detecting the battery voltage can be smoothed, and a dedicated low-pass filter or the like for detecting the battery voltage becomes unnecessary.
[0075]
In the above, the case where the average corrected battery voltage value obtained by calculating the average value based on the number of repetitions in step S1010 is compared with the set value is exemplified. The calculated value may be used. In this case, as indicated by (× 16) in step S109 and step S1010, the upper limit setting threshold and the lower limit setting threshold may be multiplied by 16 to obtain the set value. Also in this case, the effect of noise is substantially reduced, and a low-pass filter is not required.
[0076]
Subsequent to step S10, an LED lighting control processing routine is executed (step S11). When entering the LED lighting control processing routine, it is checked whether or not the on-delay timer counter is counting as shown in FIGS. 9 and 10 (step S111). Immediately after the application of the battery voltage, it is determined in step S111 that the on-delay timer counter is not counting, and it is checked whether the initial energization flag is set (step S112).
[0077]
The initial energization flag is set in the initial setting, and it is checked whether or not the battery voltage flag is set after checking the initial energization flag (step S113). At the beginning of energization, the battery voltage flag is not set (that is, the upper limit setting threshold has not been reached), and the on-delay timer counter is cleared in step S122, and all of the light emitting diodes LED1 to LED4 are turned off (step S132). ).
[0078]
Next, when the battery voltage rises and the battery voltage flag is set in step S113, the on-delay timer flag is set (step S114), and the on-delay timer counter is incremented (step S115). Subsequently, it is checked whether or not a time set by the on-delay timer counter, for example, 10 seconds, has elapsed (step S116).
[0079]
Until the set time (10 sec) elapses after the battery voltage flag is set, the count value of the stage counter is checked following step S116, and the number of light emitting diodes LED based on the count value of the stage counter is turned on. When the count value of the stage counter is 0, all the light emitting diodes LED1 to LED4 are turned off (step S123 and step S132). When the count value of the stage counter is 1, only the light emitting diode LED4 is turned on (steps S124 and S125).
[0080]
When the count value of the stage counter is 2, only the light emitting diodes LED3 and LED4 are turned on (step S126 and step S127). When the count value of the stage counter is 3, only the light emitting diodes LED2, LED3 and LED4 are turned on (steps S128 and S129). When the count value of the stage counter is 4, all the light emitting diodes LED1 to LED4 are turned on (steps S130 and S131).
[0081]
In step S113, it is determined that the battery voltage flag is set, and the on-delay timer counter is counting by executing step S114. When the next step S111 is executed, execution is performed from step S114 following step S111. Is done.
[0082]
If it is determined in step S116 that the set time (10 seconds) has elapsed, the initial energization flag is cleared following step S116 (step S117), and the on-delay timer flag is cleared (step S118). Next, the on-delay timer counter is cleared (step S119), and the process is executed from step S123. By this execution, the number of light emitting diodes LED based on the count value of the stage counter is turned on (steps S124 to S132).
[0083]
By executing step S118, it is determined that the on-delay timer counter is not counting from the time of the check in the next step S111, and the initial energization flag is checked subsequent to step S111 (step S112). In this case, the initial energization flag has been cleared by executing step S117, and it is checked after step S112 whether the battery voltage flag has been set (step S121).
[0084]
If it is determined in step S121 that the battery voltage flag is set, step S116 is not executed, and step S117 is executed after step S121. If it is determined in step S121 that the battery voltage flag has not been set, step S122 is executed following step S121.
[0085]
The setting and clearing of the battery voltage flag is as described with reference to the battery voltage detection processing routine and FIG. 14. Referring to the setting and clearing of the battery voltage flag, by executing the LED lighting control processing routine, (a) of FIG. ) And (c), all the light-emitting diodes LED1 to LED4 are turned off from the start of the application of the battery voltage until the battery voltage first rises to the upper limit setting threshold, and are set from when the upper limit setting threshold is first reached. During the time, for example, for 10 seconds, the number of light emitting diodes LED based on the count value of the stage counter is turned on. When the battery voltage drops during the set time (10 sec) and drops to the lower limit set threshold, after the set time (10 sec) elapses, all the light emitting diodes LED1 to LED4 are turned off until the battery voltage next reaches the upper limit set threshold. You. Thus, when the battery voltage recovers and reaches the upper limit setting threshold value, the on-delay timer counter becomes irrelevant thereafter, and the number of light emitting diodes LED based on the count value of the stage counter is turned on until the battery reaches the lower limit setting threshold value.
[0086]
In this way, the battery voltage that forms the threshold for turning on and off the light emitting diode LED is provided with 0.5 V of hysteresis, and the stage counter is controlled only in the range from when the upper limit setting threshold is reached to when the next lower limit setting threshold is reached. The number of light emitting diodes LED based on the count value is turned on. Further, the light emitting diode LED is turned on for a period previously set in the on-delay timer counter, for example, for 10 seconds after the upper limit threshold is first reached from the start of the application of the battery voltage. The reason for this is that the blinking of the light emitting diode LED is not repeated during a period preset in the on-delay timer counter, for example, a period of 10 seconds.
[0087]
Subsequent to step S11, a switching circuit control processing routine is executed (step S14). Upon entering the switching circuit control processing routine, the cycle time counter is incremented as shown in FIGS. 11 to 13 (step S141). The cycle time corresponds to one cycle of (on period + next off period) of the switching circuit 14, and the set time of the cycle time is set to, for example, 100 ms.
[0088]
Subsequent to step S141, it is checked whether the set time (100 ms) has elapsed (step S142). If it is determined in step S142 that the set time (100 ms) has elapsed, the cycle time counter is cleared (step S143), and it is checked whether the battery voltage flag is set (step S144). If it is determined in step S144 that the battery voltage flag has been set, it is checked after step S144 whether the count value of the stage counter is 0 (step S145).
[0089]
If it is determined in step S145 that the count value of the stage counter is 0, 0 is set as the PWM duty following step S145 (step S151). By the setting in step S151, the transistors Q1 to Q3 are controlled to be in the off state during the set time of the cycle time, and the heater 15 is controlled to be in the off state during the set time of the cycle time. That is, the duty ratio is controlled to 0%.
[0090]
If it is determined in step S145 that the count value of the stage counter is not 0, it is checked after step S145 whether the count value of the stage counter is 1 (step S152). If it is determined in step S152 that the count value of the stage counter is 1, 4 is set as the PWM duty (step S153). By the setting in step S153, the transistors Q1 to Q3 are controlled to be in the on state for a period of 40% during the set time of the cycle time, and the heater 15 is controlled to be in the on state for the period of 40% during the set time of the cycle time. That is, the duty ratio is controlled to 40%.
[0091]
When it is determined in step S152 that the count value of the stage counter is not 1, it is checked whether the count value of the stage counter is 2 following step S152 (step S154). If it is determined in step S154 that the count value of the stage counter is 2, 6 is set as the PWM duty (step S155). By the setting in step S155, the transistors Q1 to Q3 are controlled to be in the ON state for a period of 60% during the set time of the cycle time, and the heater 15 is controlled to be in the ON state for the period of 60% during the set time of the cycle time. That is, the duty ratio is controlled to 60%.
[0092]
When it is determined in step S154 that the count value of the stage counter is not 2, it is checked whether the count value of the stage counter is 3 following step S154 (step S156). If it is determined in step S156 that the count value of the stage counter is 3, 8 is set as the PWM duty (step S157). By the setting in step S157, the transistors Q1 to Q3 are controlled to be in the ON state during the period of 80% during the set time of the cycle time, and the heater 15 is controlled to be in the ON state during the period of 80% during the set time of the cycle time. That is, the duty ratio is controlled to 80%.
[0093]
When it is determined in step S156 that the count value of the stage counter is not 3, it is checked whether the count value of the stage counter is 4 following step S156 (step S158). If it is determined in step S158 that the count value of the stage counter is 4, F is set as the PWM duty (step S159). With the setting in step S159, the transistors Q1 to Q3 are controlled to be on during the set time of the cycle time, and the heater 15 is controlled to be on during the set time of the cycle time. That is, the duty ratio is controlled to 100%.
[0094]
When it is determined in step S158 that the count value of the stage counter is not 4, the processing is executed from step S151.
[0095]
If it is determined in step S142 that the set time has not elapsed, it is checked following step S142 whether the PWM duty is shorter than the set time (step S146). If it is determined in step S146 that the PWM duty is shorter than the set time, the energization flag is set (step S148), and the switching circuit control processing routine ends. If it is determined in step S146 that the PWM duty is not shorter than the set time, the energization flag is cleared (step S150), and the switching circuit control processing routine ends.
[0096]
After step S151, step S153, step S155, step S157, and step S159, it is checked whether the PWM duty is 0 (step S160). Cleared (step S162), the switching circuit control processing routine ends. When it is determined in step S160 that the PWM duty is not 0, the energization flag is set (step S164), and the switching circuit control processing routine ends.
[0097]
Here, based on the setting and clearing of the battery voltage flag, the battery voltage, the power-supply prohibited section, and the power-suppliable section are as schematically shown in FIGS. 15A and 15B. That is, a threshold obtained by adding a predetermined voltage to a lower limit setting threshold for prohibiting energization of the heater 15 is set as an upper limit setting threshold, and the average corrected battery voltage in FIG. During the period until the voltage reaches the maximum value, the power supply to the heater 15 by the switching circuit 14 is prohibited, and during the period from when the average corrected battery voltage reaches the upper limit setting threshold to when the average correction battery voltage next reaches the lower limit setting threshold, the heater 15 by the switching circuit 14 is supplied to the heater 15. To enable the power supply. In this case, the energizable section is a section in which the heater 15 can be energized. In the section in which energization is enabled by the battery voltage flag, energization of the heater 15 is controlled during the period of the cycle time of% corresponding to the count value of the stage counter as described above.
[0098]
Following the switching circuit control processing routine, an EEPROM write processing routine is executed (step S15). In the EEPROM write processing routine, the updated count value is written to a predetermined address of the EEPROM 20 only when the count value of the stage counter is updated. The count value of the stage counter written in the EEPROM 20 is used as an initial value of the stage counter.
[0099]
Therefore, when writing the count value of the stage counter, the counter values are written oddly consecutively at different predetermined addresses, and at the time of reading, the read count values of the three stage counters are read, and the read count of the stage counter is read. It is also possible to search for a value having the same count value as the value and use that value as the initial value. Alternatively, the initial value may be determined by a majority decision.
[0100]
Next, a connection structure of the grip heater control device 10 in a vehicle will be described with reference to FIG. In FIG. 16, reference numerals a to g indicate connection terminals, and reference numerals h to k and m indicate fuses, but detailed description thereof will be omitted.
[0101]
The output from the battery 11 is supplied to the heater 152, the heater 151, and the grip heater control device 10 through the connection lines 22a, 22b, 22c, 22d, 22e, 22f, and 22g via the main switch 23. Here, the connection lines 22 a, 22 b, 22 c, 22 d, 22 e, 22 f, and 22 g constitute the wiring 22. The connection line 22f is a connection line for connecting the heater 152 and the heater 151 in series. The connection line 22f receives the battery voltage at the input terminal x of the voltage dividing circuit 12 and divides the voltage via the wiring 22. Note that reference numeral 226 is a ground wire.
[0102]
As described above, the detection position of the battery voltage in the grip heater control device 10 is far from the installation position of the battery 11, and the detected battery voltage is affected by the voltage drop due to the wiring 22.
[0103]
The output from the battery 11 is supplied to the starter motor 203 via the relay switch 202 which is turned on when the starter switch 209 is turned on. On the other hand, the AC power obtained by the AC generator 204 is supplied to the charging device 205 to rectify the AC power and charge the battery 11 with the rectified output.
[0104]
The output from the battery 11 via the main switch 23 is supplied to the relay coil 210 via the starter switch 209, and when the starter switch 209 is turned on, the relay coil 210 is excited and the starter motor is driven via the relay switch 202. I have to do it.
[0105]
The output from the battery 11 via the main switch 23 is supplied to the headlamp 213 via the headlamp switch 212 so that the headlamp 213 is turned on when the headlamp switch 212 is turned on. The stop lamp 215 is supplied to the stop lamp 215 via the 214, and the stop lamp 215 is turned on when the stop switch 214 is turned on.
[0106]
The output from the battery 11 via the main switch 23 is supplied to the turn signal lamps 223R and 223L via the turn signal relay 220 and the turn signal switch 221, and the turn signal lamp specified by the turn signal switch 221 is turned on. The blinking is repeated at a cycle based on.
[0107]
On the other hand, in the LED lighting control processing routine (step S11), as described above, light emission is performed for a period preset by the on-delay timer counter, for example, for 10 seconds from when the upper limit setting threshold is first reached from the start of the application of the battery voltage. The case where the diode LED is turned on (see step S116 and the like) is illustrated. The reason for this is that the light-emitting diode LED is not repeatedly turned on and off during the period set by the on-delay timer counter, for example, 10 seconds, from the first lighting of the light-emitting diode LED.
[0108]
This is because, even when the battery 11 is new or not new, the battery voltage exceeds the upper limit setting threshold when power is supplied from the battery 11, but the battery voltage fluctuates for a short period from the time of power supply and the upper limit setting threshold and the lower limit are set. In some cases, the threshold value may be crossed, and if the process of continuing the lighting is not performed, the blinking of the light-emitting diode LED will be repeated during this time. The light emitting diode LED is turned on during the preset period, for example, a period of 10 seconds.
[0109]
In particular, when the battery 11 is not new, a sudden change in the load of the battery 11 at the time of startup, a ripple of a rectified output obtained by rectifying the output of the AC generator 204, a voltage drop in the wiring 22, and the like are schematically illustrated by a curve b in FIG. As shown in (2), the battery voltage increases while fluctuating from the start time T0. As a result, the battery voltage crosses the upper limit setting threshold and the lower limit setting threshold a plurality of times. Incidentally, the straight line a in FIG. 17 schematically shows the battery voltage when the battery 11 is new.
[0110]
Therefore, by releasing the function of turning on the light emitting diode LED for a period set in advance by the above-described on-delay timer counter, the light emitting diode LED blinks repeatedly immediately after startup. In this way, by stopping the light emitting diode LED from being kept on for the period of the set time (10 sec) of the on-delay timer counter, the battery 11 becomes old when the blinking of the light emitting diode LED is repeated from the application of the battery voltage. Can be determined to be.
[0111]
【The invention's effect】
As described above, according to the grip heater control device of the present invention, there is an operational feeling in the ON operation of the up switch means, and the energization adjustment instruction designated by the operation of the up switch and the down switch can be easily obtained from the number of light emitting diodes. Can be visually recognized. In this case, since the light emitting diodes are provided in a line, it is easy to visually recognize the number of lighting light emitting diodes, and since the energization rate for the heater corresponds to the number of lighting light emitting diodes, the heater temperature based on the control is controlled. Can be easily predicted.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a grip heater control device according to an embodiment of the present invention.
FIG. 2 is a block diagram showing functions of a control circuit in the grip heater control device according to the embodiment of the present invention.
FIG. 3 is an explanatory view of installation of a grip heater control device according to one embodiment of the present invention.
FIG. 4 is a general flowchart for explaining the operation of the grip heater control device according to the embodiment of the present invention;
FIG. 5 is a flowchart of a control circuit determination process routine for explaining the operation of the grip heater control device according to the embodiment of the present invention;
FIG. 6 is a flowchart of an up output determination processing routine for explaining the operation of the grip heater control device according to the embodiment of the present invention;
FIG. 7 is a flowchart of a down output determination processing routine for explaining the operation of the grip heater control device according to the embodiment of the present invention;
FIG. 8 is a flowchart of a battery voltage detection processing routine for explaining the operation of the grip heater control device according to the embodiment of the present invention.
FIG. 9 is a flowchart of an LED lighting control processing routine for explaining the operation of the grip heater control device according to the embodiment of the present invention.
FIG. 10 is a flowchart of an LED lighting control processing routine for explaining the operation of the grip heater control device according to the embodiment of the present invention;
FIG. 11 is a flowchart of a switching circuit control processing routine for explaining the operation of the grip heater control device according to the embodiment of the present invention;
FIG. 12 is a flowchart of a switching circuit control processing routine for explaining the operation of the grip heater control device according to the embodiment of the present invention;
FIG. 13 is a flowchart of a switching circuit control processing routine for explaining the operation of the grip heater control device according to the embodiment of the present invention;
FIG. 14 is a schematic diagram illustrating a relationship between a battery voltage and a battery voltage flag for describing an operation of the grip heater control device according to the embodiment of the present invention;
FIG. 15 is a schematic diagram showing the relationship between battery voltage, LED lighting, and heater energization control for explaining the operation of the grip heater control device according to the embodiment of the present invention.
FIG. 16 is a connection diagram illustrating a connection structure of the grip heater control device according to the embodiment of the present invention in a vehicle.
FIG. 17 is a schematic diagram for explaining a change in battery voltage immediately after startup.
[Explanation of symbols]
10: grip heater control device 11: battery
12: battery voltage dividing circuit 13: constant voltage circuit
14 switching circuit 15, 151, 152 ... heater
16 Switch unit 18 Control circuit
19: Light emitting diode unit 20: EEPROM
21 Watchdog circuit 22 Wiring
31 ... Crystal oscillator SW1 ... Up switch
SW2 ... Down switch

Claims (1)

In a grip heater control device including a switching unit for turning on / off power supply from a battery to a grip heater provided on a steering handle,
A lighting light emitting diode that controls the number of light emitting diodes among a plurality of light emitting diodes based on the number of times the up switch means is turned on, and controls the number of light emitting diodes by controlling the number of light emitting diodes based on the number of times the down switch means is turned on. Number control means;
Switching control means for controlling the switching means to a duty ratio determined according to the number of light emitting diodes,
A grip heater control device comprising:

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