JPS619355A - Flashing control circuit for brake lamp - Google Patents

Abstract

PURPOSE:To mutually recognize a braking state in one's own car and another as well as to make smooth driving for vehicles performable, by controlling the on-off operation of a brake lamp in a way of generating a control signal of frequency corresponding to the detected brake pedal reverse. CONSTITUTION:When a brake pedal is operated and the pedal reverse goes beyond a range of play, a control signal of frequency corresponding to the pedal reverse is outputted out of a frequency control circuit 13. Therefore, when braking is poor, a brake lamp 15 is driven for flashing with relatively week frequency, and in proportion as braking comes strong, the on-off frequency of the brake lamp 15 becomes higher in consecutive order whereby it comes into a state of being continuously lighted at a time when the pedal reverse is in the strongest time of braking. Therefore, a succeeding car observes the brake lamp 15 of a preceding car whereby strength of the braking is judgeable, and is able to pay attention to flashing of the brake lamp 15 of the preceding car at a superhighway or the like, so that the succeeding car is followable to a sudden speed change in the preceding car, thus a rear-end collision or a near miss is avoidable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a flashing control circuit for a brake lamp for a vehicle, and particularly to a circuit that changes the flashing state depending on whether or not the brake pedal is depressed.

[Technical Background of the Invention] Conventionally, the brake lamps of automobiles and the like are turned on when the brake pedal is depressed to a certain extent, and remain lit even when the brake pedal is depressed further. That is, conventionally, the brake lamp is continuously turned on.

[Problems with Background Art] Conventionally, brake lamps are turned on continuously during braking, so it is not possible to judge the strength of braking by observing only the brake lamps of the preceding vehicle. Therefore, even if you pay attention to the brake lights of the vehicle in front, especially on expressways, you will not be able to keep up with the sudden deceleration of the vehicle in front, and you will not be able to avoid a rear-end collision or an abnormally close situation. This caused the vehicle to brake suddenly due to a mistaken recognition (which caused danger to J-connected vehicles, etc.) and hindered smooth driving.

[Object of the Invention] This invention was made in consideration of the above circumstances, and its purpose is to control the flashing of a brake lamp at a frequency corresponding to the amount of depression of the brake pedal (depression distance),
To provide a brake lamp flashing system + ffO circuit that allows a vehicle to run smoothly by making other vehicles recognize the braking state of its own weight or by recognizing the braking state of other vehicles. .

[Summary of the Invention] In order to achieve the above object, the present invention detects the travel distance of the brake pedal, generates a control signal having a frequency corresponding to this travel distance, and uses this control signal. The flashing of the brake lights is controlled by the brake lights.

[Embodiment of the invention] An embodiment of the invention will be described below with reference to the drawings.
I will clarify.

FIG. 1 is a circuit diagram showing the configuration of a brake lamp blinking control circuit according to the present invention. In the figure, reference numeral 11 indicates a braking state, that is, a pedal travel detecting section that detects the brake pedal travel. The pedal travel detection unit 11 is equipped with a distance sensor that detects the amount of depression of the brake pedal (stroke distance) as a change in distance, a pressure sensor that detects the pressure of brake oil, etc., and detects a DC voltage corresponding to the brake pedal travel distance. Occur. This DC voltage is supplied to the signal processing circuit 12. The signal processing circuit 12 is a stepping margin detection section 1
The DC voltage obtained in step 1 is subjected to signal processing such as amplification, waveform shaping, and noise removal, and then converted to a digital signal.

The converted digital signal is supplied to the frequency control circuit 13. This frequency control circuit 13 is composed of, for example, a microcomputer equipped with a processor, and outputs a control signal that shows a frequency change as shown in FIG. live. In other words, this frequency control circuit 13 controls the braking when the brake pedal is pressed down relatively little.
- The pedal travel distance is the so-called play range, the travel distance is 0.
In the range from A control signal with a DC level corresponding to the voltage amplitude (with a frequency of 0) is generated when the stepping distance exceeds a predetermined value P2. signal).

A control signal generated by the frequency control circuit 13 is supplied to an output control circuit 14. This output control circuit 14 is comprised of a power transistor or relay whose switching is controlled based on a control signal generated by the frequency control circuit 13, and a switching transistor or transistor which controls the excitation of the excitation coil of this relay. .

Reference numeral 15 denotes a brake lamp, one end of which is connected to a battery 16, and the other end connected to a reference voltage application point via the output control circuit 14.

In this configuration, step on the brake pedal,
When the travel distance exceeds the play range P1, the frequency control circuit 13 outputs a control signal having a frequency corresponding to the travel distance of the brake pedal.

Therefore, if the braking is weak, the brake light 15
The brake lamp 15 is driven to blink at a relatively low frequency, and as the braking becomes stronger, the blinking frequency of the brake lamp 15 gradually increases, and when the braking is at its strongest when the pedal stroke exceeds P2 in FIG. .

Therefore, the following vehicle can judge the strength of braking by observing the brake lamp 15 of the preceding vehicle. Therefore, by paying attention to the flashing state of the brake lamp 15 of the preceding vehicle on a highway or the like, it is possible to follow the rapid deceleration of the preceding vehicle and avoid a rear-end collision or an abnormally close situation. Furthermore, there is no possibility that the gradual deceleration of the preceding vehicle will be mistakenly recognized as a sudden deceleration, and it is possible to prevent the vehicle from applying sudden brakes and endangering the following vehicle.

By controlling the brake lamp 15 to flash at a frequency corresponding to the braking state in this manner, smooth running of the vehicle can be achieved.

Figure 3 shows the processing operation applied to the frequency control circuit above.
It is a version of Kojit7-1.

Note that the present invention is not limited to the above-described embodiments, and various modifications are possible. For example, in the above embodiment circuit, the DC voltage obtained by the stepping distance detection section 11 is input to the signal processing circuit 1.
2 and the frequency control circuit 13 to obtain a control signal with a frequency corresponding to the braking state. A control signal may also be obtained.

[Effects of the Invention] As explained above, according to the present invention, the travel distance of the brake pedal is detected, a control signal having a frequency corresponding to this travel distance is generated, and the brake lamp is blinked using this control signal. Since the brake lamps are controlled, it is possible to provide a brake lamp blinking control circuit that allows the vehicle to run smoothly.

[Brief explanation of drawings]

FIG. 1 is a circuit configuration diagram of an embodiment of a brake lamp flashing control circuit according to the present invention, FIG. 2 is a characteristic diagram of a frequency control circuit in the above embodiment circuit, and FIG. 3 is a frequency control diagram in the above embodiment circuit. Flowchart 1 showing the operation of the circuit
It is. 11...Tread margin detection section, 12...Signal processing circuit, 1
3... Frequency control circuit, 14... Output control circuit, 1
5...Brake light, 16...Battery. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2 Pi P2 □ Michiyo Figure 3

Claims (2)

[Claims] (1) A travel distance detection means for detecting the travel distance of the brake pedal, a control signal generation means for generating a control signal having a frequency corresponding to the travel distance detected by the travel distance detection means, and the control signal generation means. A brake lamp blinking control circuit comprising: a brake lamp whose blinking is controlled based on a control signal generated by a brake lamp. (2) The control signal generating means generates a control signal whose frequency increases in accordance with an increase in the stepping distance until the stepping distance detected by the stepping distance detection means reaches a predetermined value. 2. The brake lamp blinking control circuit according to claim 1, wherein the brake lamp blinking control circuit is configured to generate a DC level control signal after reaching the predetermined value.