JP2739326B2 - Accelerator operation degree display device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accelerator operation degree display device useful for preventing the occurrence of a vehicle accident, and more particularly to an accelerator operation degree display device applied to an automobile or the like, such as an accelerator pedal or a motorcycle. The present invention relates to an accelerator operation degree display device capable of displaying the degree of rotation of an accelerator grip to the outside.

[Conventional technology and its problems]

2. Description of the Related Art A display device which is provided at a rear portion of an automobile, a motorcycle, or the like and is illuminated when a brake petal, a brake lever, or the like is operated so as to prevent a rear-end collision is known. However, since such a device is lit when the brake is operated, a rear-end collision occurs if the inter-vehicle distance is insufficient and sudden braking is applied. By the way, recently, if you are driving with enough distance between vehicles to ensure safety, you often experience being interrupted by following vehicles, and you are forced to run with insufficient distance between vehicles There is a problem.

[Means for solving the problem]

The present invention has been made in view of such a situation, and an object of the present invention is to provide an accelerator operation degree including a sensor for sensing the degree of operation of an accelerator and a display means for displaying the degree of operation based on the sensor. In the display device,
A central display section and a plurality of section display sections surrounding the center display section are formed so as to be continuous in a loop; each of the center display section and the plurality of section display sections includes an appropriate number of light emitting elements, and an accelerator pedal Immediately after the start of the operation, the light emitting element of the central display unit is turned on, and further, as the operation of the accelerator pedal progresses, the display of the plurality of partition display units is displayed so that the display of the partition display unit appears to rotate. An accelerator operation degree display device includes light emitting element control means for controlling the light emitting element to blink.

[Action]

When the accelerator pedal is depressed, the central display section lights up, and when the accelerator pedal is depressed further, the section display section of the outer ring section of the display body lights up, and as the accelerator pedal is further depressed, the section display of the outer ring section. The lighting indication of the part gradually appears to rotate.

〔Example〕

 Hereinafter, an embodiment will be described with reference to the drawings.

FIG. 1 is a block diagram of the accelerator operation degree display device of the present invention. In FIG. 1, a microprocessor unit (hereinafter referred to as an MPU) 1 is a so-called one-chip microprocessor having a CPU, a RAM, a parallel input / output port, a timer, a clock oscillation circuit, and the like. The program involved in the operation of the MPU1 is written in ROM2,
ROM2 is connected to the MPU1 via a data bus or the like of the MPU1.

A drive pulse is supplied from a 1-bit output port of the MPU 1 to a sensor 3 for sensing the depression of the accelerator. The output of the sensor 3 is supplied to a comparator 5 via a detection circuit 4 for rectification and smoothing. The output of the comparator 5 is supplied to the 1-bit input port of the MPU1.

On the other hand, an output port (for example, 9 bits) of the MPU 1 is connected to a controller 6, and an output of the controller 6 is supplied to the comparator 5 as a reference voltage.

The controller 6 has a plurality of resistors, switching elements, and the like, as shown in FIG. 3 described later. The switching elements are selected by the MPU 1 and variously change the reference voltage of the comparator 5.

The other output port of the MPU1 is supplied to a driver 7,
The output of the driver 7 is supplied to a display 8. Note that the crystal oscillator 9 is provided for clock oscillation.

FIG. 2 is a circuit diagram showing a detailed configuration of the sensor 3. In the figure, the sensor 3 forms a parallel resonance circuit of a coil 10 and a capacitor 11, a terminal B is connected to the detection circuit 4, and an output of a 1-bit output port of the MPU 1 is a resistor 12 from a terminal A. And supplied to the parallel resonance circuit through the parallel resonance circuit. Note that the terminal C is kept at the ground potential.

The coil 9 is formed in a flat shape having a diameter of about 10 cm, and is wound around a wire having a diameter of about 0.6 mm about 30 times.
The resistor 12 is mounted and accommodated in an appropriate protective body, which is fixed to a floor or the like below the accelerator pedal, and configured as shown in FIG. 1 by a lead wire or the like. Then, a rectangular wave of about 5 KHz is generated by the MPU1 by a program and supplied to the parallel resonance circuit from a 1-bit output port of the MPU1.

FIG. 3 is a circuit diagram showing an example of a detailed configuration of the controller 6. In the figure, the resistor R ₀ through resistor R ₁
R ₉ and switching elements S _{1 to} S ₉ such as transistors and FETs
Is grounded (connected to the negative power supply terminal).
Each control terminal of the switching element, for example, the gate is
Is connected to the output port P ₁ to P ₉ of the MPU 1, and selects one of the resistors R ₁ through R ₉ by the "H" level one of these output ports P ₁ to P ₉ , The resistor
A divided output of R ₀ and any one of the resistors R _{1 to} R ₉ can be obtained at the terminal E. Note that a voltage stabilized by, for example, a Zener diode is supplied between the terminal D and the ground. The voltage generated at the terminal E is supplied to the comparator 5 shown in FIG. 1 as a reference voltage.

FIG. 4 is a circuit diagram showing an example of a detailed configuration of the driver 7 and the display 8. In the figure, the driver 7 is constituted by a ring counter by the combination of the transistor T _r1 through amplifier and presettable shift register SR ₁ by T _r8, SR ₂ and the gate G of the NAND operation, the base of each transistor resistors R ₁₉ through R corresponding via any one connected to the shift register SR _1, parallel output terminals of the SR ₂ Q _a to Q _D of _26, based output of said via a resistor R ₂₇ MPU 1 of the transistor Tr ₉ It is connected to the port P _12. The emitters of the transistors are both grounded, the collector of the transistor Tr ₁ to Tr ₈ the resistance R ₁₀
Or it is connected to a corresponding one of the one terminal of the corresponding through one of the light emitting element LED1 to LED8 of R _17. And these light emitting elements LED1 to
The other terminal of the LED 8 is connected to a positive terminal of a power supply (not shown) via a corresponding one of the light emitting elements LED10 to LED17. The collector of the transistor Tr ₉ is coupled to the positive terminal of the power supply through the light emitting element LED 9.

Normally, the preset terminals A to D of the shift registers SR ₁ and SR ₂ are configured such that the left end bit is set to “H” and “L” and “H” are alternately repeated rightward from this. The preset terminals A and C of the shift registers SR ₁ and SR ₂ are connected to the output port P ₁₅ of the MPU 1
The preset terminal D of the shift register SR ₂ is MPU1
The output port P ₁₄ of are connected respectively. Also, one of the mode selection terminals S ₀ is connected to the positive power supply terminal (5 V),
Output port P ₁₀ of the other S ₁ of the mode selection terminal is the MPU1
Connected to A clock input terminal CK and a clear terminal CL is are respectively connected to the output port P ₁₁ and P ₁₃ of the MPU 1.

The parallel output terminal Q of the shift register SR _1
0 Yes be connected to the serial input terminal R of the shift register SR _2, also the parallel output terminals Q _A and Q _C of the shift register SR _1, SR ₂ is input to the gate G, whose output is the the shift register SR ₁ is connected to the serial input terminal R. The output ports P ₁₀ , P ₁₁ , P ₁₃ , P ₁₄ ,
Between the shift register and P ₁₅ is also be provided a buffer amplifier.

5 to 8 are plan views showing the main part of the display body of the display 8 in the accelerator operation degree display device of the present invention. The display shown in each figure is the center display J
And an outer ring display portion K surrounding the center display portion J. The outer ring display section K is formed by continuously connecting the section display sections 20 to 27 (FIG. 5). The light-emitting elements are arranged on a substrate having a shape substantially corresponding to the shape of the display section shown in each figure, and a number of light-emitting elements, for example, green, yellow, and red, which are adjacent to each other, are arranged in different colors. The substrate is housed in a container made of, for example, a metal material, a plastic material, wood, or the like, and has a light-emitting surface formed by the light-emitting element on one surface of the container so that the light-emitting surface can be viewed from the outside. In the case of the above configuration, the display is performed in various colors by the same display unit of one of a (a-1, a-2) to c shown in FIGS. 5 to 8. However, each of them can be formed of a single-color light-emitting element and displayed separately, for example, horizontally or vertically, as in a (a-1, a-2) to c of each of the above drawings. Can also. The plurality of light emitting elements facing the display unit may be directly exposed, but if necessary, a decorative plate such as a milky white translucent plate or the like with a demarcation line attached thereto is attached, The light emitting element may be hidden.

Display of the present invention, the configured as light-emitting element showing the accelerator operation degree of its belonging emitting element for each of the partition display unit the transistor Tr ₁ to Tr
₇ is connected to be driven respectively (FIG. 4), the light-emitting element showing the accelerator operation degree of the light-emitting element of the central display portion J is connected to be displayed by the transistor Tr ₈ .

5 to 8, the display unit a-1 shows a mode in which the accelerator pedal is slightly depressed, and a mode in which the accelerator pedal is further depressed is displayed in the display unit a. -2. The meaning of the arrow is to indicate that the outer wheel display portion appears to rotate faster as the accelerator pedal is depressed.

The display part b shows a mode of displaying a state in which the accelerator is not operated, that is, a state in which no force is applied to the accelerator pedal. Display in color. The display section c shows a mode in which the state when the brake is applied is displayed by a drive source (not shown), and the entire display section is displayed almost uniformly in red, or has the same configuration as the circuit configuration shown in FIG. In addition to the operation degree of the accelerator petal, the other driving source may display the rotation in red in conjunction with the operation of the brake petal.
Driving Cal emitting element given to the display of this embodiment the transistor Tr ₉ is responsible.

The operation of the accelerator operation degree display device of the present invention configured as described above will be described below.

The drive signal of the sensor 3 is formed into a rectangular wave of about 5 KHz by executing a timer interrupt routine or the like, and is supplied to the parallel resonance circuit. As a result, the sensor outputs a sine wave signal that becomes maximum at its resonance frequency due to the flywheel effect, and the sine wave signal is rectified by a diode (not shown) of the detection circuit 4, and the rectified output is a filter (not shown) And the like, and becomes almost a DC voltage, which is input to the comparator 5 as a signal to be compared.

On the other hand, the MPU 1 operates the controller 6 by executing another program. Referring to FIG. 3, for example,
Change to "H" level output port P ₁ from "L" level of the first the output port P ₁ to P _9. Then, since the switching element S ₁ is turned, the terminal voltage of the resistor R ₁ is supplied as a reference voltage to the comparator 5.
The output of the comparator 5 is supplied to the input port of the MPU1, and the MPU1 checks by a program whether or not the state of the input port has changed from "L" level to "H" level, for example. If not, the output port
Returned to P ₁ based on the "L" level, and change the output port P ₂ of the "L" level to "H" level, the said similar MPU1 examines the state of the input port. Still unless Hen' the state of the input port back to the output port P ₂ to the original "L" level, and changes to "H" level output port P ₃ from the "L" level, the state of said input ports Find out. Since such operations sequentially repeated until the output port P _9, the time required for the operation to round is about 500 .mu.s. The operation is performed such that the reference voltage of the comparator 5 changes stepwise from a high voltage to a low voltage. if,
If changes to the state, that the output is "H" level of the comparator 5 of the input port, which is what is in the "H" level of the output port P ₁ to P ₉ is determined, based on this Output port P outputting to the driver 7
_{From 11,} the frequency of the clock supplied to the shift registers SR ₁ and SR ₂ is determined and executed as such.

The signal to be compared by the comparator 5 is, for example, in a state where the sensor 3 is fixed to a lower part of an accelerator pedal, for example.
The frequency of the drive signal of the sensor or the resonance frequency of the parallel resonance circuit is determined in advance so as to be maximum when the accelerator pedal is not depressed. Then, a difference between the voltage of the signal to be compared when the accelerator pedal is fully depressed and the maximum voltage is obtained, and in the case of the embodiment, each voltage is divided into nine steps and the respective voltages are supplied to the comparator 5. resistor R ₀ to R ₉ of the controller 6 so as to be supplied as the reference voltage is determined. For example, if the maximum voltage is 5 V and the voltage of the compared signal when the accelerator pedal is fully depressed is 0.6 V, the difference is 4.4 V. Therefore, as the reference voltage to the comparator 5 by the operation of the output port P ₁ to P ₉ 4.4
V, 3.91V, 3.42V, 2.93V, 2.44V, 1.96V, 1.47V, 0.98
V and 0.49V are sequentially supplied. If a voltage corresponding to the state where the accelerator pedal is fully depressed, that is, 0.6 V, is supplied as the compared signal, the output port P ₉ is at “H” level, that is, the reference voltage of the comparator 5 is When the voltage is 0.49 V, the output of the comparator 5 becomes "H" level. Thus, the MPU1 supplies a shift pulse of the highest frequency from the P ₁₁ output ports to the shift register of the driver 7. Just before this,
The MPU 1 sets the output port P ₁₅ to “H” level,
Output port P ₁₄ is "L" after setting the output port P ₁₀ of the level "H" at the left end bit parallel outputs of the shift register SR _1, SR ₂ as a level "H" and then, it "alternately from the right L "and" H "are repeatedly set. Therefore, when the accelerator pedal is fully depressed, the display unit a-2 shown in FIGS. It appears to rotate at high speed. When depression of the accelerator pedal is relaxed than this state, the output frequency of the shift pulse outputted from the port P ₁₁ is lowered, the rotational speed of a result the outer display unit K is delayed. Further, when the accelerator pedal is slightly depressed, for example, when 4.2 V is supplied as the compared signal, the output port P ₂ is at “H” level, that is, the reference voltage of the comparator 5 is 3.91 V. At this time, the output of the comparator 5 becomes "H" level. Thus, the MPU1 is the shift register SR _1, from the output port to the clear terminal of the SR ₂ "L" issues a level control signal, once clear parallel output state of the shift register SR _1, SR _2. Then to the output port P ₁₄ "H" level, and then after setting the "L" level to the output port P _15, via the output port P ₁₀ to the mode selection terminal S ₁ "H" level A one-shot pulse is sent. As a result, the only transistor Tr ₈ is turned, the shift pulse is not supplied from the output port P ₁₁ in this case. Therefore, in this state, only the center display section J displays as shown in a-1 of FIGS. 5 to 8. When the accelerator pedal is not depressed, the output port
P ₁₄ is "L" is the output port P ₁₂ to level "H" LED 9 of the level eg yellow lights. At that time, it is displayed as in the display section b. Note that this LED9 is the output port P ₁₂ is "L" level to turn off to when being depressed i.e. the accelerator pedal when lighting the other the LED. In the above embodiment, the light emitting element is constituted by an LED, but may be constituted by an incandescent lamp.

FIG. 4 shows the transistors Tr _{1 to} T ₁ of the driver 7.
Although the light emitting elements driven by r ₉ are not shown only one or two for each transistor, the case of driving the display body shown in FIG. 5 to FIG. 8, the number of suitable and the like connected in parallel To be increased. FIG. 4 shows a ring counter composed of two ICs. However, a ring counter composed of three ICs may be used, and the state of the preset terminal may be appropriately changed according to the display method. I do. The output port can be rotated and displayed by operating the output port without using the ring counter.

〔The invention's effect〕

As described in detail above, according to the present invention, since the display body is formed by continuously forming a plurality of partitioned display portions on the display, the outer ring display portion appears to rotate quickly as the accelerator pedal is depressed. It is possible to reliably inform the following vehicle or the like of the running state of the depression of the accelerator and to contribute to maintenance of safe driving such as prevention of a rear-end collision accident, which is extremely useful.

[Brief description of the drawings]

FIG. 1 is a block diagram of an accelerator operation degree display device for operating a display body of the present invention, FIG. 2 is a circuit diagram of a sensor, FIG. 3 is a circuit diagram of a controller, and FIG. 4 is a circuit diagram of a driver and a display. 5 to 8 are plan views showing the main parts of the display according to the present invention. 1 ... MPU, 2 ... ROM, 3 ... Sensor, 4 ... Detector circuit, 5 ... Comparator, 6 ... Controller, 7 ... Driver, 8 ... Display, 20,27 ... Segment display unit, J: Central display unit, K: Outer ring display unit.

Claims (1)

(57) [Claims] 1. An accelerator operation degree display device comprising: a sensor for detecting an operation degree of an accelerator; and a display means for displaying an operation degree based on the detection of the sensor. The section display section is formed so as to be continuous in a circle, and each of the center display section and the plurality of section display sections includes an appropriate number of light-emitting elements, and immediately after the operation of the accelerator pedal is started, the center display section is formed. And a light-emitting element control unit that controls the light-emitting elements of the plurality of section display units to blink so that the display of the section display unit appears to rotate as the operation of the accelerator pedal progresses. An accelerator operation degree display device, characterized in that: