JP3628314B2 - Grip heater control device - Google Patents

Description

[0001]
BACKGROUND 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 in a steering handle of a motorcycle, a snowmobile, a water bike, 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 handle warm, and the grip is heated by controlling the energization of the heater to the driver. It provides a comfortable driving environment.
[0003]
This type of vehicle grip heater control device is already known, for example, from Japanese Patent Application Laid-Open No. 10-79284 and Japanese Patent No. 3323247.
[0004]
A conventional vehicle grip heater control apparatus uses a potentiometer output voltage from a potentiometer as a comparison voltage in order to adjust the energization of the heater by operating a potentiometer integrated with a power switch. The switching circuit is turned on / off by PWM output generated by level comparison with a wave, for example, a triangular wave, and the heater is heated by controlling 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. In order to prioritize the vehicle running, before the battery voltage drops below the minimum voltage for driving the starter motor, It is necessary to stop the power supply from the battery. Therefore, when the battery voltage is close to the minimum voltage required for driving the starter motor by detecting the battery voltage, the battery voltage monitoring forcibly controls the switching circuit to the off state regardless of the comparison voltage value. A circuit is provided, and further, a fail-safe circuit for forcibly controlling the switching circuit to an OFF state when the comparison voltage becomes indefinite.
[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 value VS1, the switching circuit is controlled to be in the energization prohibited state and supplied to the battery voltage monitoring circuit. When the voltage value based on the battery voltage is larger than the second voltage threshold value VS2 (VS2> VS1), the switching circuit is controlled to be energized.
[0007]
In this case, the minimum required voltage value required for 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 set to VS1 = V _N By setting −Δv1 + Δv2, hysteresis is caused by the first voltage threshold value VS1 and the second voltage threshold value VS2, and when the battery voltage drops, the energization prohibition state is set when the battery voltage drops below the first voltage threshold value VS1. When the voltage threshold value VS2 or higher is reached, the energization is enabled, the energization is prohibited, frequent repetition of energization is prevented, and the minimum battery voltage is maintained.
[0008]
[Problems to be solved by the invention]
However, when using the conventional vehicle grip heater control device, the voltage fluctuation of the AC generator appears strongly at the beginning of the battery voltage application, the battery voltage is not stable, and the light emitting diode repeatedly blinks, causing anxiety There was a problem of letting.
[0009]
SUMMARY OF THE INVENTION An object of the present invention is to provide a grip heater control device that can remove anxiety caused by blinking of a light emitting diode when a battery voltage is unstable immediately after application of a battery voltage.
[0010]
[Means for Solving the Problems]
The grip heater control device of the present invention is a grip heater control device including switching means for turning on / off the energization from the battery to the grip heater provided in the steering handle.
The number of lit light emitting diodes in a plurality of light emitting diodes is controlled based on the number of times the up switch means is turned on, and the number of lit light emitting diodes is controlled by controlling the number of turned off light emitting diodes based on the number of times the down switch means is turned on. Number control means;
The number of light-emitting diodes that illuminate during the period from when the battery voltage reaches the upper limit setting threshold to the next lower limit setting threshold, with the threshold set by adding a predetermined voltage to the lower limit setting threshold prohibiting energization of the heater as the upper limit setting threshold An energization control means for controlling on / off of the switching means to an energization rate determined by the control means;
The number of light emitting diodes determined by the lighting light emitting diode number control means is turned on for a predetermined period after the upper limit setting threshold is first reached after the application of the battery voltage, and the battery voltage is set to the upper limit after the predetermined period has elapsed. Light emitting diode lighting control means for turning on the number of light emitting diodes determined by the lighting light emitting diode number control means during the period from reaching the threshold value to the next lower limit setting threshold value,
It is provided with.
[0011]
According to the grip heater control device according to the present invention, the number of light emitting diodes is determined based on the number of times the up switch means is turned on and the number of times the down switch means is turned on. Therefore, there is a feeling of operation in the ON operation of the up switch means and the ON operation of the down switch means, and further, the instruction by the ON operation of the up switch means and the down switch means can be easily visually recognized from the number of light emitting diodes. In this case, for example, if the light emitting diodes are provided in a line, it is easy to visually recognize the number of the light emitting diodes.
[0012]
Further, according to the grip heater control device according to the present invention, the switching means is switched to the energization rate determined by the lighting light emitting diode number control means during the period from when the battery voltage reaches the upper limit setting threshold to the next lower limit setting threshold. ON / OFF is controlled. Since the energization rate for the heater corresponds to the number of lighting light emitting diodes, the heater temperature based on the on / off control can be easily predicted from the number of lighting light emitting diodes.
[0013]
Further, according to the grip heater control device of the present invention, the number of light emitting diodes determined by the lighting light emitting diode number control means is lit for a predetermined period after the upper limit setting threshold is first reached after the battery voltage is applied. Therefore, there is no anxiety when the battery voltage is not stable in the initial application of the battery voltage. After the predetermined period has elapsed, the number of light emitting diodes determined by the lighting light emitting diode number control means is turned on during the period from when the battery voltage reaches the upper limit setting threshold to the next lower limit setting threshold, The energization control can be visually recognized.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
A grip heater control device according to the present invention will be described according 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 a function of a control circuit in the 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.
[0015]
As shown in FIG. 3, a front fork 25 comprising a pair of pipes for suspending a front wheel (not shown) is provided at the front end of the body frame of the motorcycle, and the front wheel is steered at the upper end of the front fork 25. A cylindrical steering handle 27 is provided so as to extend separately to the left and right via the 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).
[0016]
In addition, a cowling 29 made of a resin material is attached to the outside of the vehicle body integrally with 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.
[0017]
The grip heater control device 10 displays a heater 15 composed of a flexible printed wiring board or the like built in the left grip 17 and a right grip (not shown), the setting status of the heater 15, and sets the current amount to the heater 15. And a switch unit 16 for
[0018]
As shown in FIG. 3, the switch unit 16 is embedded in the left cowling 24, and its upper part slightly protrudes from the surface of the left cowling 24.
[0019]
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, thereby dividing the battery voltage. A divided voltage Vb based on the battery voltage is output from the circuit 12. 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 the voltage constant, and the constant voltage V 13 _DD Is 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 from the battery 11 to the heater 15 and the energization interruption are controlled to control the heat generation amount of the heater 15. .
[0020]
The battery voltage dividing circuit 12 divides the battery voltage by the resistors R1 and R2 and the variable resistor VR connected in series, and outputs the divided voltage Vb via the resistor R3. Here, the capacitor C1 is a smoothing capacitor, and the diode D1 has a constant voltage V _DD This is a diode for preventing a backflow 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.
[0021]
In addition to the rectifying diode D2 and the smoothing capacitor C2, the constant voltage circuit 13 supplies the battery voltage rectified by the diode D2 and smoothed by the capacitor C2 to the constant voltage V. _DD A three-terminal regulator 131 and a capacitor C3 for smoothing the output of the three-terminal regulator 131. Constant voltage V _DD Is used as a power source for a switch unit 16, a control circuit 18, a light emitting diode unit (also referred to as an LED unit) 19, an EEPROM 20, and a watchdog circuit (WD) 21 provided in the grip heater control device 10.
[0022]
The switching circuit 14 receives the voltage obtained by rectifying the battery voltage supplied from the battery 11 via the main switch 23 by the diode D2 and smoothing it by the capacitor C2, and is controlled to be turned on / off by the output from the terminal OUT0 of the control circuit 18. A steering amplifier, a transistor Q1 constituting a preamplifier, a transistor Q2 constituting a driver driven on / off by the collector output of the transistor Q1, and a power transistor Q3 driven on / off by the transistor Q2, The power transistor Q3 controls on / off of energization from the battery 11 to the heaters 151 and 152 that are separately provided on the steering wheel and connected in series to form the heater 15.
[0023]
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. A resistor R8 and a resistor R9 are bias resistors of the transistor Q3, and drive the output transistor Q3 on and off with the output of the transistor Q2. The Zener diode ZD2 is a voltage limiting Zener diode, and the Zener diode ZD3 is a surge absorber.
[0024]
Therefore, during the period when the terminal OUT0 of the control circuit 18 is at a high potential, the transistors Q1 to Q3 are controlled to be turned on, and the heater 15 is energized from the battery 11 via the main switch 23. During the period when 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 energization to the heater 15 is cut off.
[0025]
The switch unit 16 has a constant voltage V by a resistor R10. _DD Output to the control circuit 18 by being pulled up and pressed, and an up switch SW1 for instructing an increase in the energization 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 switch is pulled up and pressed to the control circuit 18 to instruct a decrease in the energization period of the heater 15.
[0026]
The light-emitting diode unit 19 includes light-emitting diodes LED1 to LED4 that are controlled to be turned on and off by 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 in approximately one row and integrally. It is arranged.
[0027]
By driving the light emitting diodes LED4, LED3, LED2, and LED1, the energization period is instructed to increase sequentially in the order of lighting of only the light emitting diode LED4, lighting of the light emitting diodes LED4 and LED3,... Indicates that Resistors R12 to R15 in the light emitting diode unit 19 are current limiting resistors to the light emitting diodes LED1 to LED4.
[0028]
The EEPROM 20 is a storage device that receives the output from the control circuit 18 and stores and updates the count value of the stage counter, which will be described later. The stored content is used as the initial value of the count value of the stage counter at the time of restart. use.
[0029]
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 control circuit 18 in operation. In the case of malfunction, the control circuit 18 is reset to reset the operation of the control circuit 18.
[0030]
The control circuit 18 is composed of a computer that operates in response to 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 it has been pressed for a predetermined period. Switch output processing means 180 that performs switch processing such as determination when both the switch SW1 and the down switch SW2 are pressed, detects the battery voltage by receiving the divided voltage Vb, and is necessary for the battery voltage to drive the starter motor The battery voltage detection determination means 181 for determining whether or not the minimum voltage value is exceeded is functionally provided (see FIG. 2).
[0031]
Further, the control circuit 18 basically receives the outputs from the up switch SW1 and the down switch SW2, determines the ON period and the ON number of the up switch SW1, and determines the ON period and the ON number of the down switch SW2. Based on the outputs from the up / down instruction period determining means 182, the up / down instruction period determining means 182 and the battery voltage detection determining means 181, the energization duty ratio setting means 183 for substantially setting the energization to the heater 15 and its duty ratio. , Functionally provided with pulse generation means 185 for generating a pulse for control indicating whether the control circuit 18 is normal or abnormal from the terminal PO1.
[0032]
Furthermore, the battery voltage detection determination means 181 averages a correction battery voltage obtained by adding a 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.
[0033]
Further, the up / down instruction period determining means 182 controls the number of light-emitting light emitting diodes based on the number of times that the up switch SW1 is turned on and controls the number of light-off light emitting diodes based on the number of times that the down switch SW2 is turned on. Including means for controlling the number.
[0034]
The energization duty ratio setting means 183 uses the threshold obtained by adding a predetermined voltage to the lower limit setting threshold for prohibiting energization of the heater 15 as the upper limit setting threshold, and then the lower limit setting threshold after the battery voltage reaches the upper limit setting threshold. Means for controlling on / off of the switching circuit 14 at a current rate determined by means for controlling the number of light-emitting light emitting diodes, and predetermined after reaching the upper limit threshold value for the first time from the application of the battery voltage. The number of light-emitting diodes that are determined by the means for controlling the number of light-emitting light-emitting diodes is turned on for a predetermined period, and after the predetermined period has elapsed, the battery voltage reaches the upper limit setting threshold and then reaches the lower limit setting threshold. Controls lighting of the number of light emitting diodes determined by the means for controlling the number of light emitting diodes during the period, and the battery voltage is set to the lower limit During the period from less than the value until the next reaches the upper limit setting threshold includes means for turning off control of all light-emitting diodes.
[0035]
Here, the up / down instruction period determination unit 182 and the energization duty ratio setting unit 183 substantially function as the PWM unit 184.
[0036]
Next, the operation of the grip heater control device 10 will be described based on the flowcharts shown in FIGS.
[0037]
FIG. 4 shows a general flowchart of the grip heater control device 10.
[0038]
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 grip heater driving state is read, the interrupt timer time is set, and the flag An initial setting such as setting or clearing a class is made (step S1). Here, the time of the interrupt timer is set to 10 ms, for example.
[0039]
Following the initial setting in step S1, it is checked whether an interrupt flag based on the interrupt timer is set (step S2). Here, for example, an interrupt flag is set every 10 ms.
[0040]
If it is determined by the check in step S2 that the interrupt flag is not set, a control circuit determination processing routine is executed (step S3), and then executed again from step S2.
[0041]
When the control circuit determination processing routine is entered, the watchdog circuit 21 receives the output from the terminal PO1 of the control circuit 18, and when the high potential and the low potential are alternately sent continuously from the terminal PO1, the control circuit Is determined to be normal. Specifically, as shown in FIG. 5, the count value of the internal counter is cleared (step S31), and the count 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). When the count reaches 10 in step S33, it is checked after step S33 whether or not 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 terminal PO1 is at a low potential, the output of terminal PO1 is set to a high potential (step S36). The control circuit determination routine is completed by executing steps S35 and S36.
[0042]
Here, in step S33, if the internal counter is incremented every 0.1 ms, for example, 10 count is 1 ms. When the control circuit 18 is normal, steps S35 and S36 are performed every 1 ms. The high potential of 1 ms and the low potential of 1 ms are alternately output from the terminal PO1 of the control circuit 18 repeatedly. When the control circuit 18 is not normal, the execution of step S35 or step S36 is continued for more than 1 ms, and a high potential or low potential output is output from the terminal PO1 of the control circuit 18 for a predetermined processing time (steps S4 to S11 described later). , S14 and S15, and the total processing time of step S3).
[0043]
As described above, when the output from the terminal PO1 of the control circuit 18 is received and the high potential and the low potential are alternately sent continuously, the control circuit 18 determines that the control circuit 18 is normal by the watch dog circuit 21. To 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. Thus, a reset output is sent to the reset terminal of the control circuit 18, and the control circuit 18 is reset.
[0044]
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, when the battery voltage is equal to or higher than a predetermined voltage, it is determined whether or not the up switch SW1 is turned on for a predetermined period, for example, 30 ms or longer. When it is determined that the up switch SW1 has been turned on for a predetermined period or longer when the battery voltage is equal to or higher than a 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 when the up switch SW1 is turned on when the battery voltage is lower than a predetermined voltage, the up switch SW1 is turned on. The operation of the up switch SW1 is also invalidated when it is determined that SW1 has been turned on for a predetermined period.
[0045]
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 or not the down switch SW2 has been turned on for a predetermined period or longer, for example, 30 ms or longer. When it is determined that the down switch SW2 has been turned on for a predetermined period or longer when the battery voltage is equal to or higher than a predetermined voltage by this determination, 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 on. Even if the down switch SW2 is turned on when the battery voltage is lower than a predetermined voltage, the down switch ON2 Even when it is determined that the switch SW2 has been turned on for less than a predetermined period, the operation of the down switch SW2 is invalidated.
[0046]
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 pressed simultaneously, that is, the up switch on. When both the 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 the switch on flags are cleared.
[0047]
As described above, when only the up switch SW1 is in the on state for a predetermined period or longer when only the up switch SW1 is at a predetermined voltage or higher by executing the steps S5 to S7, the up switch SW1 is turned on. When it is determined that the switch has been turned on, and only the down switch SW2 has a battery voltage that is equal to or higher than a predetermined voltage, it is determined that the down switch SW2 has been turned on when the battery has been turned on for a predetermined period. Is done.
[0048]
Subsequent to step S7, an up output determination processing routine is executed (step S8). When the up output determination processing routine is entered, as shown in FIG. 6, it is checked whether or not both switch-on flags are cleared (step S81). When it is determined in step S81 that the both switch-on flags are not cleared, the up output determination processing routine is terminated.
[0049]
If it is determined in step S81 that both switch-on flags are cleared, it is checked whether or not the up switch-on flag is set following step S81 (step S82).
[0050]
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 or not the up output determination time, for example, 130 ms has passed (step S84). ). When it is determined in step S84 that the up output determination time has not elapsed, the up output determination processing routine is terminated.
[0051]
If it is determined in step S84 that the up output determination time has elapsed, it is checked whether or not the release flag is cleared (step S85). If it is determined that the release flag is cleared, the stage counter is checked. It is checked whether or not the count value of (STCNT) is less than 4 (step S86). If it is determined that the count value is less than 4 in step S86, 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 lit.
[0052]
If 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 greater than or equal to the count value 5 (step S88). Here, the reason why 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. When the count value of the stage counter is 5 or more, The reason 4 is also for the same reason.
[0053]
Subsequent to step S87 and step S88, the release flag is set (step S901). Following step S901, the up output determination time counter is cleared (step S90), and the up output determination processing routine is terminated. If it is determined in step S85 that the release flag is not cleared, the process is executed from step S90.
[0054]
If it is determined in step S82 that the up switch on flag is not set, the 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, the up switch SW1 and the down switch SW2 are turned on at the same time, and the up output determination processing routine is terminated.
[0055]
As described above, in the up output determination processing routine (step S8), when the up switch SW1 is released, the release flag is set and the release is prevented. When the up switch SW1 is not released, that is, when the release flag is cleared, the on time of the up switch SW1 is counted by the up output judgment time counter, and the up switch SW1 is turned on once when the output judgment time elapses. The count value of the stage counter is sequentially incremented every time. Thus, 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 is turned on once, and the up switch SW1 is turned on. Every time the count value of the stage counter is incremented.
[0056]
Subsequent to step S8, a down output determination processing routine is executed (step S9). When the down output determination processing routine is entered, as shown in FIG. 7, it is checked whether or not both switch-on flags are cleared as in step S81 (step S91). When it is determined in step S91 that the both switch-on flags are not cleared, the down output determination processing routine is terminated.
[0057]
If it is determined in step S91 that both switch-on flags are cleared, it is checked whether or not the down switch-on flag is set following step S91 (step S92).
[0058]
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 or not the down output determination time has elapsed (step S94). When it is determined in step S94 that the down output determination time has not elapsed, the down output determination processing routine is terminated.
[0059]
If it is determined in step S94 that the down output determination time has elapsed, it is checked whether the release flag is cleared (step S95). If it is determined in step S95 that the release flag is 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).
[0060]
Subsequent to step S97, the down output determination time counter is cleared (step S98), and the down output determination processing routine is ended. 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 executed. If it is determined in step S95 that the release flag has not been cleared, steps S96 and S97 are skipped and step S98 is executed.
[0061]
If it is determined in step S92 that the down switch on flag is not set, the release flag is cleared (step S99), and step S98 is executed.
[0062]
As described above, in the down output determination processing routine (step S9), when the down switch SW2 is released, the release flag is set and the release is prevented. When the down switch SW2 is not released, that is, when the release flag is cleared, the on time of the down switch SW2 is counted by the down output judgment time counter, and every time the down switch SW2 is turned on once the output judgment time elapses. The count value of the stage counter is sequentially decremented. Thus, 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 is turned on once, and the down switch SW2 is turned on. Every time the count value of the stage counter is decremented.
[0063]
Here, as is apparent from the LED lighting control processing routine (step 11) and the switching circuit control processing routine (step S14) described later, the stage counter controls the number of LEDs that are turned on and off based on the count value. In addition, it is a counter for controlling the energization on / off period of the heater 15 by the switching circuit 14.
[0064]
Subsequent to step S9, a battery voltage detection processing routine is executed (step S10). When the battery voltage detection processing routine is entered, as shown in FIG. 8, the A / D converted divided voltage Vb based on the battery voltage (hereinafter, the battery voltage unless otherwise confused in step S10 and the related description). Is also read (step S101), and after step S101, it is checked whether or not the energization flag is set (step S102).
[0065]
A correction voltage value for compensating for a voltage drop due to the wiring 22 connecting between the heater 15, the battery 11, and the grip heater control device 10 by energization is obtained in advance by actual measurement. In the grip heater control device 10, this measured value was 0.7V, but this value varies depending on the vehicle type, such as the type of electric wire and the energization current. For example, the control circuit 18 converts the correction voltage value based on the voltage division ratio of the voltage dividing circuit 12 (hereinafter, also referred to as a correction voltage value or simply as a correction value unless confusion occurs in step S10 and the related description). Is stored in a built-in ROM.
[0066]
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 partial pressure are read. The corrected battery voltage is obtained by adding the voltage Vb (step S104). By the addition process in step S104, the output voltage of the battery 11 at the terminal position of the battery 11 is substantially detected.
[0067]
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 accumulation is incremented (step S106). Next, it is checked whether or not 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 a predetermined value, the battery voltage detection processing routine is terminated.
[0068]
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. Is checked (step S108).
[0069]
When it is determined in step S108 that the battery voltage flag is set, a battery voltage lower limit setting threshold (= set value) for prohibiting energization of the heater 15 that is predetermined and stored in the built-in ROM is set. Read (step S109). Here, the lower limit setting threshold value is a value obtained by dividing the minimum voltage value required by 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 is not set, the voltage set as hysteresis is added to the lower limit setting threshold following step S108, and the upper limit setting of the battery voltage stored in the built-in ROM in advance is set. A threshold value (set value) is read (step S1010). Here, the upper limit setting threshold is also a value divided based on the voltage dividing ratio of the voltage dividing circuit 12, and 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 the hysteresis voltage. In addition to the lower limit setting threshold, the upper limit setting threshold is set.
[0070]
Following execution of steps S109 and S1010, whether or not a predetermined accumulated value of the battery voltage to which the correction value is added, for example, an average corrected battery voltage obtained by averaging 16 accumulated values is greater than a set value. When it is checked (step S1011) and determined to be large in step S1011, a battery voltage flag is set (step S1012), and then the count value and 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), then the count value and accumulated value of the A / D counter are cleared (step S1014), and the battery voltage detection processing routine is terminated. .
[0071]
In the above, step S105 to step S107 are executed, the divided voltage Vb to which the correction voltage value is added is accumulated a predetermined number of times, for example, 16 times, and the average value of the accumulated value is taken in step S1010 to obtain the average correction battery. The voltage is obtained and the average corrected battery voltage is compared with the set value in order to obtain the output voltage at the terminal position of the battery 11 more accurately by reducing the influence of noise by obtaining the average corrected battery voltage. It is.
[0072]
In the battery voltage detection processing routine (step S10), the battery voltage flag is not set at the beginning of voltage application to the battery 11, and step S1010 is executed following step S108, and the battery voltage flag is cleared in step S1013. In addition, at the beginning of voltage application of the battery 11, the battery voltage is not yet stable, the battery voltage is lower than the upper limit setting threshold value read in step S1010, and the battery voltage flag is cleared in step S1013. The calculated value is cleared (steps S1010, S1013, S1014). When the battery voltage increases above the upper limit setting threshold due to the continuation of this step execution, the battery voltage flag is set in step S1012.
[0073]
Since the battery voltage flag is set in the execution of this step, in the subsequent execution from step S108, step S109 is executed subsequent to step S108, and the lower limit setting threshold value read in step S109 is set in step S1010. The battery voltage flag is continuously set until the battery voltage drops to the lower limit setting threshold. When the battery voltage drops to the lower limit setting threshold, steps S1010 to S1013 are executed, and the battery voltage The flag is cleared.
[0074]
As a result, the battery voltage flag corresponds to the set values having hysteresis (lower limit setting threshold and upper limit setting threshold), and as shown schematically in FIG. Done. FIG. 14A shows the change of the battery voltage, and FIG. 14B shows the set / clear state of the battery voltage flag.
[0075]
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 the heater 15 is energized, is added to the detected battery voltage, so the wiring 22 when the heater 15 is energized. The voltage drop due to the resistance is compensated. In addition, since a predetermined number of accumulated values are used, noise at the time of battery voltage detection can be smoothed, and a dedicated low-pass filter or the like for battery voltage detection becomes unnecessary.
[0076]
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 has been illustrated. 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. Even in this case, the influence of noise is substantially reduced and no low-pass filter is required.
[0077]
Following step S10, an LED lighting control processing routine is executed (step S11). When the LED lighting control processing routine is entered, as shown in FIGS. 9 and 10, it is checked whether the on-delay timer counter is counting (step S111). Immediately after 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).
[0078]
The initial energization flag is set in the initial setting, and after the initial energization flag is checked, it is checked whether or not the battery voltage flag is set (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), the on-delay timer counter is cleared in step S122, and all the light emitting diodes LED1 to LED4 are turned off (step S132). ).
[0079]
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 set time by the on-delay timer counter, for example, 10 seconds has elapsed (step S116).
[0080]
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 (step S124 and step S125).
[0081]
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 (step S130 and step S131).
[0082]
When it is determined in step S113 that the battery voltage flag is set and step S114 is executed, the on-delay timer is being counted, and when executing from the next step S111, it is executed from step S114 following step S111. The
[0083]
If it is determined in step S116 that the set time (10 sec) 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. As a result of this execution, a number of LEDs based on the count value of the stage counter are turned on (steps S124 to S132).
[0084]
By executing step S118, it is determined that the on-delay timer is not being counted from the time of the next check in step S111, and the initial energization flag is checked following step S111 (step S112). In this case, the initial energization flag is cleared by the execution of step S117, and it is checked whether or not the battery voltage flag is set following step S112 (step S121).
[0085]
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 is not set, step S122 is executed subsequent to step S121.
[0086]
The setting and clearing of the battery voltage flag are as described with reference to the battery voltage detection processing routine and FIG. 14. With reference to the setting and clearing of the battery voltage flag, the execution of the LED lighting control processing routine causes the ) And (c), all the light emitting diodes LED1 to LED4 are extinguished until the battery voltage first rises to the upper limit setting threshold from the beginning of battery voltage application, and the setting is made when the upper limit setting threshold is first reached. During the time, for example, 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 falls to the lower limit setting threshold, after the set time (10 sec) has elapsed, all the light emitting diodes LED1 to LED4 are turned off until the battery voltage reaches the upper limit set threshold next time. The When the battery voltage recovers and reaches the upper limit setting threshold, the on-delay timer 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 lower limit setting threshold is reached.
[0087]
In this way, the battery voltage that forms the threshold value for turning on and off the light emitting diode LED has a hysteresis of 0.5 V, and the stage counter is only in the range from reaching the upper limit setting threshold to the next lower limit setting threshold. The number of light emitting diodes LED based on the count value is turned on. Further, after reaching the upper limit setting threshold for the first time from the start of application of the battery voltage, the light emitting diode LED is turned on for a period set in advance in the on-delay timer, for example, 10 seconds. This is because the light emitting diode LED is not repeatedly blinked during a period set in advance in the on-delay timer, for example, a period of 10 seconds.
[0088]
Subsequent to step S11, a switching circuit control processing routine is executed (step S14). When the switching circuit control processing routine is entered, the cycle time counter is incremented as shown in FIGS. 11 to 13 (step S141). The cycle time corresponds to one cycle of the switching circuit 14 (ON period + next subsequent OFF period), and the set time of the cycle time is set to 100 ms, for example.
[0089]
Following step S141, it is checked whether a 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 is set, it is checked after step S144 whether the count value of the stage counter is 0 (step S145).
[0090]
When it is determined in step S145 that the count value of the stage counter is 0, following step S145, 0 is set as the PWM duty (step S151). By the setting of step S151, the transistors Q1 to Q3 are controlled to be turned off during the set time of the cycle time, and the heater 15 is controlled to be turned off during the set time of the cycle time. That is, the energization rate is controlled to 0%.
[0091]
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 an on state for a period of 40% during the set time of the cycle time, and the heater 15 is controlled to be in an on state for a period of 40% during the set time of the cycle time. That is, the energization rate is controlled to 40%.
[0092]
If it is determined in step S152 that the count value of the stage counter is not 1, it is checked after step S152 whether the count value of the stage counter is 2 (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 an ON state during a period of 60% during the set time of the cycle time, and the heater 15 is controlled to be in an ON state for a period of 60% during the set time of the cycle time. That is, the energization rate is controlled to 60%.
[0093]
If it is determined in step S154 that the count value of the stage counter is not 2, whether or not the count value of the stage counter is 3 is checked 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 of step S157, the transistors Q1 to Q3 are controlled to be in an ON state for 80% of the cycle time setting time, and the heater 15 is controlled to be in the ON state for 80% of the cycle time setting time. That is, the current supply rate is controlled to 80%.
[0094]
If it is determined in step S156 that the count value of the stage counter is not 3, whether or not the count value of the stage counter is 4 is checked 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). By the setting of step S159, the transistors Q1 to Q3 are controlled to be on during the cycle time setting time, and the heater 15 is controlled to be on during the cycle time setting time. That is, the energization rate is controlled to 100%.
[0095]
If it is determined in step S158 that the count value of the stage counter is not 4, the process is executed from step S151.
[0096]
If it is determined in step S142 that the set time has not elapsed, it is checked after step S142 whether the PWM duty is shorter than the set time (step S146). When 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 is ended. When 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 is ended.
[0097]
Following 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 is terminated. 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 is ended.
[0098]
Here, based on the setting and clearing of the battery voltage flag, the battery voltage, the energization prohibition section and the energization possible section are as schematically shown in FIGS. 15A and 15B. 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, the energization of the heater 15 is controlled during the cycle time of% corresponding to the count value of the stage counter as described above.
[0099]
Following the switching circuit control processing routine, an EEPROM writing processing routine is executed (step S15). When the EEPROM writing routine is entered, 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 the initial value of the stage counter.
[0100]
Therefore, at the time of writing the count value of the stage counter, it is written to the predetermined addresses different from each other odd number of times, and at the time of reading, the count values of the three stage counters that have been written are read, and the count of the read stage counters A value having the same count value may be searched and used as an initial value. Alternatively, the initial value may be determined by majority determination.
[0101]
Next, a connection structure of the grip heater control device 10 in the vehicle will be described with reference to FIG. In FIG. 16, reference symbols a to g indicate connection terminals, reference symbols h to k and reference symbol m indicate fuses, and description thereof is omitted.
[0102]
The output from the battery 11 is supplied via the main switch 23 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. 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 22 f is a connection wiring that connects the heater 152 and the heater 151 in series, and receives and divides the battery voltage at the input end x of the voltage dividing circuit 12 via the wiring 22. Reference numeral 226 is a ground wire.
[0103]
Thus, the battery voltage detection position 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 caused by the wiring 22.
[0104]
The output from the battery 11 is supplied to the starter motor 203 via the relay switch 202 that is turned on when the starter switch 209 is turned on. On the other hand, 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 a rectified output.
[0105]
The output from the battery 11 via the main switch 23 is supplied to the relay coil 210 via the starter switch 209, the relay coil 210 is excited when the starter switch 209 is turned on, and the starter motor is driven via the relay switch 202. I have to do it.
[0106]
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 214, and the stop lamp 215 is turned on when the stop switch 214 is turned on.
[0107]
The output from the battery 11 via the main switch 23 is supplied to the winker lamps 223R and 223L via the winker relay 220 and the winker switch 221 so that the winker lamp on the side specified by the winker switch 221 is supplied to the winker relay 220. The blinking is repeated at a cycle based on.
[0108]
On the other hand, in the LED lighting control processing routine (step S11), as described above, the light emitting diode is used for a period preset by the on-delay timer from the time when the upper limit setting threshold is first reached from the start of battery voltage application, for example, for 10 seconds. The case where the LED is turned on (see step S116 and the like) is exemplified. This is because the light-emitting diode LED does not blink repeatedly during the period set in advance by the on-delay timer, for example, for 10 seconds, from the first lighting of the LED.
[0109]
Even if the battery 11 is new or not new, the battery voltage exceeds the upper limit setting threshold when the power supply from the battery 11 is started. When the process of continuing the lighting is not performed in some cases, the LED blinks repeatedly during this period, but the on-delay timer prevents the blinking from occurring. The light-emitting diode LED is turned on during the set period, for example, 10 sec.
[0110]
In particular, when the battery is not new, it is schematically shown in FIG. 17b by a sudden change in the load of the battery 11 at startup, a ripple of the rectified output rectified from the output of the AC generator 204, a voltage drop in the wiring 22, and the like. Thus, the battery voltage increases while fluctuating from T0 at startup. As a result, the battery voltage crosses the upper limit setting threshold and the lower limit setting threshold multiple times. Incidentally, in FIG. 17a, the battery voltage when the battery is new is schematically shown.
[0111]
For this reason, the LED blinking is repeated immediately after startup by releasing the function of turning on the LED for a period set in advance by the on-delay timer. In this manner, by stopping the light-emitting diode LED from being turned on during the set time (10 sec) of the on-delay timer, it is indicated that the battery is out of date when the LED blinks repeatedly after the battery voltage is applied. It can be.
[0112]
【The invention's effect】
As described above, according to the grip heater control device of the present invention, the number of light emitting diodes determined by the lighting light emitting diode number control means is lit for a predetermined period after the upper limit threshold is first reached after the battery voltage is applied. The number of light emitting diodes determined by the lighting light emitting diode number control means is lit after the predetermined period has elapsed until the battery voltage reaches the upper limit setting threshold and then reaches the lower limit setting threshold; and Since all the light emitting diodes are turned off during the period from when the battery voltage is less than the lower limit threshold to the next upper limit threshold, the light emitting diodes are turned on during the unstable period of the battery voltage after the battery voltage is applied. Thus, the feeling of instability due to the blinking of the light emitting diode is eliminated.
[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 illustrating functions of a control circuit in the grip heater control device according to the embodiment of the present invention.
FIG. 3 is an installation explanatory diagram of a grip heater control device according to an 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 processing 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 showing a relationship between a battery voltage and a battery voltage flag for explaining the 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 in a vehicle of the grip heater control device according to the embodiment of the present invention.
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 divider 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 having a switching means for turning on / off the energization from a battery to a grip heater provided on a steering handle, the number of lit light emitting diodes in a plurality of light emitting diodes is based on the number of times the up switch means is turned on. And controlling the number of lit light-emitting diodes by controlling the number of light-emitting light-emitting diodes based on the number of times the down switch means is turned on,
The number of light-emitting diodes that illuminate during the period from when the battery voltage reaches the upper limit setting threshold to the next lower limit setting threshold, with the threshold set by adding a predetermined voltage to the lower limit setting threshold prohibiting energization of the heater as the upper limit setting threshold An energization control means for controlling on / off of the switching means to an energization rate determined by the control means;
The number of light emitting diodes determined by the lighting light emitting diode number control means is turned on for a predetermined period after the upper limit setting threshold is first reached after the application of the battery voltage, and the battery voltage is set to the upper limit after the predetermined period has elapsed. Light emitting diode lighting control means for turning on the number of light emitting diodes determined by the lighting light emitting diode number control means during the period from reaching the threshold value to the next lower limit setting threshold value,
A grip heater control device comprising:

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