JPH0248240A - Indicator - Google Patents

Abstract

PURPOSE:To inform a following vehicle or the like of the degree of accel operation by a method wherein a plurality of indicator sections are cyclically formed so that an indicator part looks rotating according to the degree of accel operation. CONSTITUTION:When voltage corresponding to a state that an accel pedal is most strongly trod is supplied, an output port P9 is set to level H, and an MPU supplies a shift pulse of highest frequency from an output port P11 to a shift register of a driver 7. An indicator a-2 looks rotating at highest speed, accordingly. When the accel pedal is trod less intensively, frequency of the shift pulse to be output from the output port P11 is weakened so that rotation speed of an outer indicator K is slowed down. When the accel pedal is trod slightly, only the center indicator J is indicated as shown by a-1. When the accel pedal is not trod, an output port P14 is set to level L and an output port P12 is set to level H and yellow LED 19 lights up.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a display body useful for preventing the occurrence of vehicle accidents, and is particularly applicable to automobiles, etc., and is applicable to display devices such as accelerator pedal depression or accelerator grip of motorcycles, etc. This relates to a display body that can externally display the degree of rotation.

[Prior art and its issues]

2. Description of the Related Art Display devices that are installed at the rear of automobiles, motorcycles, and the like and illuminate when brake pedals, brake levers, etc. are operated to prevent rear-end collisions have been known. However, since such lights turn on when the brakes are operated, if the following distance is insufficient and sudden braking is applied, a rear-end collision may occur. By the way, recently, when I drive a car with a sufficient following distance to ensure safety, I often find myself being cut into by a car following me, and I am forced to drive with an insufficient following distance. There is a problem.

[Means to solve the problem]

The present invention was made in view of such circumstances, and its purpose is to notify the following vehicle of the degree of accelerator operation, so that the following vehicle knows the degree and selects a necessary and sufficient following distance to ensure safety. In an accelerator operation degree display device that is equipped with a sensor that detects the degree of accelerator operation and a display means that displays the degree of operation based on the detection of the sensor, the accelerator operation degree display device is designed to enable the driver to maintain driving. The display body used in the display means is characterized in that a plurality of partition display parts are formed in series in a circular manner so that the display part appears to rotate in accordance with the degree of operation.

[For production]

When the accelerator is not operated, the display device indicating the degree of accelerator operation is off, and when the accelerator is depressed, part of it lights up, and when the accelerator is depressed further, the outer ring of the display device lights up. As the pedal is further depressed, the outer ring portion appears to rotate faster and faster.

〔Example〕

Embodiments will be described below with reference to the drawings.

FIG. 1 is a block diagram of an accelerator operation degree display device according to the present invention. In the figure, a microprocessor unit (hereinafter referred to as MPU) 1 is a so-called one-chip microprocessor that incorporates a CPtJSRAM, a parallel input/output board, a timer clock oscillation circuit, and the like. A program related to the operation of the MPU 1 is written in a ROM 2, and the ROM 2 is connected to the MPUI via a data bus of the MPUI.

A 1-bit output port of the MPU 1 supplies a drive pulse to a sensor 3 that detects the degree of accelerator pedal depression. Further, the sensing output of the acid sensor 3 is supplied to a comparator 5 via a rectifying and smoothing detection circuit 4. The output of the comparator 5 is then supplied to the 1-bit input port of the MPUI.

On the other hand, the output port (for example, 9 bits) of the MPUI is connected to a controller 6, and the 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, etc., as shown in FIG. 3, which will be described later, and changes the reference voltage of the comparator 5 in various ways by selecting the switching elements using the MPUI.

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

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

The coil 9 is formed into a flat shape with a diameter of approximately ioam, has a diameter of approximately Q, is wound with a 5 mm wire approximately 30 times, is attached with the capacitor 11 and the resistor 12, is housed in a suitable protective body, and is attached to the accelerator pedal. It is constructed as shown in FIG. 1 by being fixed to the lower floor or the like and using lead wires, etc. and,
A rectangular wave of approximately 5 KHz is generated by the program in the MPL 11, and this is supplied to the parallel resonant circuit from the 1-bit output port of the MPUI.

FIG. 3 is a circuit diagram showing an example of a detailed configuration of the controller 6. As shown in FIG. In the figure, the resistor R0 includes resistors R1 to R9 and switching elements S such as transistors and FETs.
It is grounded (connected to the negative power terminal) via I to S. Each control terminal, such as a gate, of the switching element is connected to the output port PI to P of the MPUI, and any one of these output ports P to P is connected to the output port PI to P of the MPUI.
By setting the resistor R1 to H'' level, any one of the resistors R1 to R3 can be selected, and a divided voltage output between the resistor R0 and any one of the resistors R1 to R1 can be obtained across the terminal. A voltage stabilized by, for example, a Zener diode is supplied between the terminal and ground.The voltage generated across the terminal is also supplied as a reference voltage to the comparator 5 shown in FIG.

FIG. 4 is a circuit diagram showing an example of a detailed configuration of the driver 7 and the display 8. In the same figure, the driver 7 is composed of a ring counter formed by a combination of an amplifier formed by transistors Trl to TrIl, a presettable shift register SR, SR, and a NAND gate G, and the base of each transistor is connected to a resistor R19 to R26.
said shift register SR, via a corresponding one of said shift registers SR,.

Parallel output terminals QA to Q of SR2. The base of the transistor Tr is connected to the MP through a resistor R2.
It is connected to the output port P1□ of the UI.

The emitters of the transistors are both grounded, and the collectors of the transistors Tr are connected to one of the light emitting elements LED1 to LED8 via a corresponding one of the resistors R1 to R17. Connect to one terminal of the two. The other terminals of these light emitting elements LEDI to LED8 are connected to the light emitting elements LEDI to LED8.
It is connected to a positive terminal of a power source (not shown) via a corresponding one of the LEDs 17 to 17. Further, the collector of the transistor Tr is connected to the positive terminal of the power source via the light emitting element LED9.

The preset terminals A to A of the shift registers SRI and SR1 are normally configured to set the leftmost bit to "H" and alternately repeat "L" and "H" from there to the right, but the operation described below The present terminals A and C of the shift registers SR+ and SRz are connected to the MP
The shift register S R is connected to the output port PI5 of the UI.
The second preset terminal is the output port P of the MPUI.
+a respectively. Also, one of the mode selection terminals S.

is connected to the positive power supply terminal (5■), and the other mode selection terminal S1 is connected to the output port P1° of the MPUI. The clock input terminal CK and clear terminal CL are connected to the output ports pH and PI3 of the MPUI, respectively.

The parallel output terminal Q0 of the shift register SR1 is connected to the serial input terminal R of the shift register SRz.
and the shift registers SR, SR
The parallel output terminals QA and Qc of 2 are connected to the gate G.
and its output is the shift register S R+
It is connected to serial input terminal R of . Note that the output port P+.

A buffer amplifier may be provided between P IlI P+3I Pea, P +s and the shift register.

5 to 8 are plan views showing essential parts of the display body of the present invention. The display body shown in each figure is the central display part J.
, and is provided with an outer ring display section K surrounding the central display section J. The outer ring display section includes section display sections 20 to 27 (fifth
(Fig.) are formed by continuing them in a circular manner. The light-emitting element has a large number of light-emitting elements, for example, those emitting green, yellow, and red light, arranged on a substrate having a shape substantially corresponding to the shape of the display section shown in each figure, with adjacent comrades having different colors, The substrate is housed in a container made of, for example, a metal material, a plastic material, wood, or the like, and a light-emitting surface formed by the light-emitting element is exposed on one side of the container so as to be visible from the outside. When configured as described above, any one of a (a-1゜a-2) to C shown in FIGS. 5 to 8
Displays can be made in various colors using two identical display sections, but as in the case of a (a-1, a2) to C in each of the above figures, each can be formed with a monochromatic light emitting element, for example horizontally or vertically. They can also be arranged and displayed separately.

Note that the plurality of light emitting elements facing the display section may be directly exposed, but if necessary, a decorative board with partition lines etc. drawn thereon, such as a milky white translucent board, etc., may be attached, thereby making it possible to The light emitting element may be hidden.

The display body of the present invention is configured as described above, and the light emitting elements indicating the accelerator operation degree among the light emitting elements to which each section display section belongs are the transistors Tr1 to Tr.
t (FIG. 4), and among the light emitting elements of the center display section J, a light emitting element indicating the degree of accelerator operation is connected so as to be displayed by the transistor Trs.

In FIGS. 5 to 8, the display section a-1 shows a mode in which the accelerator pedal is slightly depressed, and the display section a-1 displays a mode in which the accelerator pedal is depressed a little more. -2. The purpose of the arrow is to indicate that the more the accelerator pedal is depressed, the faster the outer wheel display section K appears to rotate.

The display section A-2 shows the state when the accelerator is not operated, that is, when no force is applied to the accelerator pedal, and the part of the display section a-2 that appears to be in a state where rotation has stopped is colored yellow or orange. 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 the display section C has a configuration similar to the circuit configuration shown in the fourth diagram. By using the other driving source, it is possible to display a rotating red color in conjunction with the operation of the brake pedal, in the same way as displaying the degree of operation of the accelerator pedal. The transistor Tr9 is responsible for driving the light emitting elements involved in this mode of display.

The accelerator operation degree display device for operating the display of the present invention constructed as described above and the operation of the display according to the present invention will be described below.

The drive signal for the sensor 3 is generated into a rectangular wave of approximately 5 KHz by executing a timer interrupt routine, for example, and is supplied to the parallel resonant circuit. As a result, the sensor outputs a sine wave signal that is maximized at its resonant 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 passed through a filter (not shown). etc., and becomes a substantially DC voltage, which is input to the comparator 5 as a signal to be compared.

On the other hand, the MPUI operates the controller 6 by executing other programs. Referring to FIG. 3, for example, first the ratio capo) p+ to P.

Output port P is changed from "L" level to "H" level. Then, the switching element S1 becomes conductive, and the terminal voltage of the resistor R1 is supplied to the comparator 5 as a reference voltage. The output of the comparator 5 is supplied to the input port of the MPUI, and the MPUI uses a program to check whether the state of the input port has changed from, for example, the "L" level to the "H" level.If it has not changed, the The output port P is returned to the original "L" level, the output port P2 is changed from the "L" level to the "H" level, and the MPUI checks the status of the input port in the same manner as above.

If the state of the input port has not changed, the output port Pz is returned to the original "L" level, the output port P3 is changed from the "L" level to the "H" level, and the state of the input port is checked. . From now on, such operations will be performed on output port P.
9, and the time required for the operation to complete one cycle is about 500 μs. The operation is performed such that the reference voltage of the comparator 5 changes stepwise from a high voltage to a low voltage. If the state of the input port, that is, the output of the comparator 5 changes to "H" level, it is determined which of the output ports PI to P is set to "H" level, and based on this, it is determined which of the output ports PI to P is set to "H" level. Output port Pl+ outputs to the dry half
The frequency of the clock to be supplied to the shift transistors SR, SR, is determined from the above, and is executed accordingly.

The compared signal of the comparator 5 is adjusted to the frequency of the drive signal of the sensor or the parallel resonance so that the sensor 3 becomes maximum when the accelerator pedal is not depressed when the sensor 3 is fixed to the lower part of the accelerator pedal, for example. Determine the resonant frequency of the circuit in advance. Then, the difference between the voltage of the compared signal when the accelerator pedal is fully depressed and the maximum voltage is determined, and in the case of the embodiment, this is divided into nine stages, and each voltage is set by the comparator 5. The resistors Ro to R5 of the controller 6 are determined so that the voltage is supplied as a reference voltage. For example, if the maximum voltage is 5.times. and the voltage of the compared signal when the accelerator pedal is fully depressed is 0.6 V, then the difference is 4.4.times.. Therefore, by operating the output ports P to P9, the comparator 5 receives reference voltages of 4.4 V, 3.91 V, and 3.42 V.
, 2.93V, 2.44■, 1.96V・, 1.47V
, 0.98V, and 0.49V are sequentially supplied. If the compared signal is supplied with a voltage corresponding to the most depressed state of the accelerator pedal, that is, 0.6 cm, then the output port pq is at "H" level, that is, the reference voltage of the comparator 5. When the voltage is 0.49V, the output of the comparator 5 becomes "H" level.

Accordingly, the MPUI supplies the shift register of the driver 7 with the highest frequency shift pulse from the output port P l'l. Immediately before this, the MPUI
sets the output port PUS to the 6H" level, sets the output port P+4 to the "L" level, sets the output port P1 to the "H" level, and then outputs the shift registers SR, SR.
The parallel output of , is set so that the leftmost bit is "H" and "L" and "H" are alternately repeated from there to the right. Therefore, when the accelerator pedal is depressed all at once, , display section a-2 in FIGS. 5 to 8
In this state, it appears to rotate at maximum speed.

When the accelerator pedal is depressed less than in this state, the frequency of the shift pulse outputted from the output port Pz is lowered, and as a result, the rotational speed of the outer wheel display section becomes slower.

Further, when the accelerator pedal is slightly depressed and, for example, 4.2V is supplied as the signal to be compared, the output port P2 is at "H" level and the reference voltage of the comparator 5 is 3.91V. At this time, the output of the comparator 5 becomes "H" level.As a result, the MPUI outputs a "L" level control signal from the output port to the clear terminal of the shift registers SR, SR2, , SR, is cleared once. Next, the output port P14 is set to "H" level, and then the output port P15 is set to "L" level.
” level, a one-shot pulse of “H” level is sent to the mode selection terminal S1 via the output capacitor (P+).As a result, the transistor T
r, is conductive, and in this case, the output port P11
No shift pulse is supplied from. Therefore, in this state, only the central display section J displays as shown in a-1 of FIGS. 5 to 8. When the accelerator pedal is not depressed, the output capo P+4 is "L".
” level, the output port P1□ is set to the “H” level, and the yellow LED 9 lights up. At that time, the display is displayed as shown in the above display section. Note that this LED 9 is set to the “H” level.
When turning on the ED, that is, when the accelerator pedal is depressed, the output capo P+2 is set so that it turns off when the accelerator pedal is depressed.
The light emitting element is set to the L level. In the embodiment described above, the light emitting element is an LED, but an incandescent light bulb may be used as the light emitting element.

In FIG. 4, the number of light emitting elements driven by the transistors Tr+ to Tr of the driver 7 is one for each transistor.
Although not shown, when driving the display bodies shown in FIGS. 5 to 8, the number can be increased appropriately by connecting them in parallel or the like.

In addition, although Fig. 4 shows a ring counter configured with two ICs, a ring counter with three ICs may be used, and the state of the preset terminals may be changed as appropriate to suit the display method. do. Note that it is also possible to rotate and display the output port by operating the output port using software instead of using the ring counter.

〔Effect of the invention〕

As explained in detail above, according to the present invention, a plurality of section display sections are connected in a circular manner to form a display body, so that as the accelerator pedal is depressed, the outer wheel display section speeds up (seems to rotate). This is very useful because it can reliably notify the following vehicle of the accelerator depression state and contributes to maintaining safe driving such as preventing rear-end collisions.

[Brief explanation of the drawing]

Fig. 1 is a block configuration diagram of an accelerator operation degree display device that operates the display of the present invention, Fig. 2 is a circuit diagram of the sensor, Fig. 3 is a circuit diagram of the controller, and Fig. 4 is a circuit diagram of the driver and display. , FIGS. 5 to 8 are plan views showing essential parts of the display body according to the present invention. 1...MPU. 2...ROM. 3...Sensor, 4...Detection circuit, 5...Comparator, 6...Controller, 7...Driver, 8...Display, 20.27...Division display section, J...・Central display section, K ・Outer ring display section.

Claims (1)

[Claims] In an accelerator operation degree display device that is equipped with a sensor that detects the degree of accelerator operation and a display means that displays the degree of operation based on the detection of the sensor, a plurality of display parts are provided so that the display portion appears to rotate in accordance with the degree of accelerator operation. A display body for use in the display means, characterized in that the division display portions are formed in series in a circular manner.