JPS5827863Y2 - side monitoring device - Google Patents

Description

[Detailed description of the invention] This invention relates to a side monitoring device that assists in ensuring the safety of the sides of an automobile.

Conventionally, various devices have been proposed that have an obstacle detection means using sound, radio waves, light, etc., and a notification means for notifying the presence of an obstacle.

When such a device is used to monitor the side of a car, with the conventional configuration, the presence of utility poles etc. frequently activates the notification means when driving in a city, making it difficult to drive.

On the other hand, it is often necessary to know whether or not there is an obstacle on the side of the vehicle, such as when making a left turn while driving in a city, when starting, or when attempting to park.

This invention was made in order to solve the above problem, and is used in a side monitoring device that monitors the side of a car, detects the presence or absence of an obstacle, and notifies the user to that effect. It is often necessary to ensure lateral safety by adding a side monitoring control means that activates the lateral monitoring function only when the vehicle is running at low speed based on the signal from the speed detection means. When turning left while driving in the city.

The side monitoring function is activated only when driving at low speeds, such as when starting or parking, to prevent excessive warning of obstacles such as utility poles when driving in a city, for example, when driving at a speed exceeding a predetermined value. It is intended to.

An embodiment of this invention shown in the drawings will be described below.

In FIG. 1 showing the first embodiment, numeral 1 is an obstacle detector mounted on a car and serving as obstacle detection means using ultrasonic waves; 2 is a monitoring area set by the obstacle detector 1; Reference numeral 3 indicates an alarm which serves as an alarm means for notifying obstacles by, for example, lighting a lamp; 4 indicates a vehicle speed sensor which serves as a speed detection means which converts the running speed into a pulse signal according to the rotation of the wheels; and 5 and 6 indicate side sensors. A vehicle speed determination circuit 5 constitutes a monitoring control means and determines whether the traveling speed is below a predetermined value;
6 is a power cutoff circuit that cuts off the power to the alarm 3 when the traveling speed is above a predetermined value, and 7 is a power supply terminal.

As shown in FIG. 2, the obstacle detector 1 includes an ultrasonic transmitter 8,
An oscillator 10 that excites the ultrasonic receiver 9 and the ultrasonic transmitter 8
, a detection signal generator 11 connected to the ultrasonic receiver 9;
It is composed of an output terminal 12.

Further, as shown in FIG. 3, the alarm 3 includes a transistor 13
and a lamp 14.

Furthermore, the vehicle speed determination circuit 5 includes a known OCR oscillator 15, a reset signal generator 16 that outputs a reset signal with a predetermined period, and a latch signal that has the same period as this reset signal and is slightly ahead of the reset signal in time. a launch signal generator 1.7 that counts the number of output pulses of the vehicle speed sensor 4; a binary counter 18 that counts the number of output pulses of the vehicle speed sensor 4;
1 and whose output terminal is connected to the binary counter 18, which controls the pulse signal from the vehicle speed sensor 4, and which is connected to the output terminal Q1 of the binary counter 18 and receives the launch signal from the latch signal generator 17. It consists of a Noritsubu flop 20.

In addition, the power cutoff circuit 6 includes a relay 21a having a normally open contact.
$'' and the transistor 21 that drives this relay 21a.
It consists of

Next, the operation of the embodiment having the above structure will be explained using FIG. 4.

The ultrasonic transmitter 8 excited by the oscillator 10 of the obstacle detector 1 emits ultrasonic waves into space.

When an obstacle exists within the monitoring area 2, the ultrasound is reflected by the obstacle and received by the ultrasound receiver 9, and as a result, the output terminal 12 of the detection signal generator 11 becomes "1".
” level.

At this time, a pulse signal 100 (FIG. 4 1) having a frequency corresponding to the speed V of the vehicle is transmitted from the vehicle speed sensor 4 to the Noah gate 19.
is input.

On the other hand, the binary counter 18 is reset by the reset signal 101 (FIG. 4, 2) of a predetermined period generated by the reset signal generator 16 from the signal of the CR oscillator 15 of the vehicle speed discrimination circuit 5, and the output terminal Q1 is set to "On level". Figure 4 3).

Next, the pulse signal 100 from the vehicle speed sensor 4 is input to the binary counter 18, and when the speed V of the vehicle is equal to or higher than the predetermined value VE, the output terminal Ql of the binary counter 18 becomes "19" before the next reset signal 101 is input. Rubel (4th
3), the pulse signal 100 from the vehicle speed sensor 4 is no longer input to the binary counter 18 by the NOR gate 19, and the output terminal Ql is outputted to the next reset signal 101.
Holds “11 levels” until input.

The output signal 102 (FIG. 4) of this output terminal Q1 is applied to the data terminal of the Noritub flop 20.

- power, launch signal 103 from latch signal generator 17 (
4) is applied to the clock terminal of the flip-flop 20, and as a result, the output terminal of the flip-flop 20 goes to the "on" level, making the transistor 21 of the power cutoff circuit 6 non-conducting and leaving the relay 21a open. Then,
Power from the power supply terminal 7 is not supplied to the transistor 13 of the alarm 3.

Therefore, even if the output terminal 12 of the obstacle detector 1 is "11 lvl", the lamp 14 of the alarm 3 does not light up, and no obstacle is notified.

- When the speed V of the lucky day vehicle is less than the predetermined value vH, the output terminal Q1 of the binary counter 18 is reset before reaching the "In level", so it holds "01 level", and as a result, the output terminal of the flip-flop circuit 20 q becomes the "1" level, making the transistor 21 of the power cutoff circuit 6 conductive, the relay 21a becomes closed, and power is supplied from the power supply terminal 7 to the transistor 13 of the alarm 3.

Therefore, if the output terminal 12 of the obstacle detector 1 is at the lI+ level, the transistor 13 becomes conductive, lighting the lamp 14, and notifying the presence of the obstacle.

FIG. 5 shows a second embodiment of this invention. In addition to the configuration of the first embodiment, the vehicle speed discrimination circuit 5 includes a second binary counter 22 for counting the number of output pulses of the vehicle speed sensor 4, and a binary counter 22 for counting the number of output pulses of the vehicle speed sensor 4. a NOR gate 23 that controls a pulse signal from the vehicle speed sensor 4 that is input to the counter 22; an AND gate 24 that is connected to a predetermined output terminal Q2 of the binary counter 22 and an output terminal Q of the Noritsu flop 20;
It is composed of an OR gate 25 which is connected to the output terminal Q of the first binary counter 18 and an AND gate 24, and whose output terminal is connected to the data terminal of the flip-flop 20.

Note that the output terminal Q2 of the second binary counter 22 is set to reach the "L" level with a smaller number of pulses than the output terminal Q1 of the first binary counter 18.

The configurations of the obstacle detector 1, alarm 3, vehicle speed sensor 4, and power cutoff circuit 6 are the same as in the first embodiment.

The operation of the second embodiment having the above configuration will be explained using FIGS. 5 and 6.

Assuming that the speed of the moving vehicle is accelerated from zero today, the output terminal Q2 of the second binary counter 22 becomes at
When the vehicle speed VL reaches the 1n level (VL<VH), the 1st. Output terminal Ql of the second binary counter 18, 22.

Q2 maintains the "jO" level.

Therefore, the input terminals of the OR gate 25 are both at the "0" level, and the data terminal of the flip-flop 20 is It Oj.
j level, and the output terminal Q of the flip-flop 20 becomes the 'Y level.

The relay 20 of the power cutoff circuit 6 is closed, and power is supplied to the alarm 3.

Next, when the vehicle speed V reaches Vt, the output terminal Ql of the first binary counter 18 is at the '1'' level, but the second
The output terminal Q2 of the second binary counter 22 reaches the 1n level, and the pulse signal from the vehicle speed sensor 4 is no longer inputted by the NOR gate 23, and the output terminal Q2 of the second binary counter 22 maintains the (t1jj level).

However, the output terminal Q of the flip-flop 20 is
level, the output terminal of the AND gate 24 is
0'' level and the state of the flip-flop 20 also does not change.

When the vehicle speed V further increases and exceeds the speed vH at which the output terminal Q1 of the first binary counter 18 reaches the ItlIj level, the output of the OR gate 25 becomes 1 level and the output terminal 0 of the flip-flop 20 becomes the "0" level. The supply of power to the alarm 3 is then stopped.

Next, when the vehicle speed V decreases and VL≦v<vH, the output terminal Q1 of the first binary counter 18 is at the Ojj level, but the output terminal Q2 of the binary counter 22 of the second option is at the ゛°1'' level. becomes.

Moreover, since the output terminal Q of the flip-flop 20 is at the °°1'' level, the output terminal of the AND gate 24 is at the °°1'' level.
The output terminal of the 1" level OR gate 25 also becomes the "1" level, and the output terminal of the flip-flop 20 becomes "0".
Maintain the level.

The power supply to the alarm 3 is stopped at 11.

When the vehicle speed V further decreases and becomes vL>V, power is supplied to the alarm 3 in the same manner as in the initial state.

FIG. 6 shows the relationship between the vehicle speed V and the signal level at the output terminal Q of the flip-flop 20. Hysteresis can be provided in the signal level at the output terminal Q of the flip-flop 20 with respect to the vehicle speed V.

FIG. 7 shows a third embodiment of this invention, in which the power cutoff circuit 6 is removed from the first to second embodiments, and an AND gate 26 is used instead, so that the fault is not affected by the power supply of the alarm 3. The configuration is such that the signal from the object detector 1 is cut off in accordance with the vehicle speed V as in the first or second embodiment.

The detailed operation of each part is the same as in the first or second embodiment.

In the embodiment described above, the operation of the alarm 3 is controlled, but the operation of the obstacle detector 1 or the operation of both the alarm 3 and the obstacle detector 1 may be controlled.

Then, the electric power supplied to the alarm 3 is cut off using a switch that is opened (OFF) when the pointer of the speedometer indicating the traveling speed of the automobile rises at a predetermined position 1;
It is also easy to stop the side monitoring function.

Furthermore, although a sensor for detecting the rotation of the wheels has been described as the vehicle speed sensor 4, the vehicle speed may be detected by a known Doppler radar or the like.

Furthermore, although the obstacle detector 1 has been described as using ultrasonic waves, it is also possible to detect obstacles using radio waves, light, or the like.

As explained in detail above, this invention is a side monitoring device that monitors the side of a vehicle, detects the presence or absence of an obstacle, and notifies the user of the presence or absence of an obstacle. By providing side monitoring control means that activates the side monitoring function only when the vehicle is traveling at low speed based on the signal from this speed detection means, low speed driving such as when turning left or changing course in city driving is provided. The lateral monitoring function can be activated only at certain times, and has the excellent effect of preventing excessive warning of obstacles such as utility poles when traveling at a speed exceeding a predetermined value.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the essentials of the first embodiment of this invention, Fig. 2 is a block diagram showing the structure of the obstacle detector for Fig. 1, and Fig. 3 is the main part shown in Fig. 1. FIG. 4 is a signal waveform diagram of the third circuit, FIG. 5 is a detailed diagram of the second embodiment of this invention, and FIG.
A signal characteristic diagram is provided to explain the operation of the embodiment shown in the figure, and FIG. 7 is a block diagram showing an outline of the third embodiment of this invention. 1... Obstacle detector serving as obstacle detection means, 3...
An alarm serving as a notification means; 4... a vehicle speed sensor serving as a speed detection means; 5... a vehicle speed determination circuit serving as a main part of the side monitoring control means; 6... a main part of the side monitoring control means. 26... AND gate forming the main part of the side monitoring control means.

Claims (1)

[Scope of utility model registration request] A side monitoring device comprising an obstacle detection means for monitoring the side of a vehicle and detecting the presence or absence of an obstacle, and a notification means for receiving a signal from the obstacle detection means and notifying the presence or absence of an obstacle, a speed detecting means for detecting the traveling speed of the vehicle; and a speed detecting means for detecting the obstacle while determining that the traveling speed of the vehicle is in a first speed region for low-speed traveling based on a signal from the speed detecting means. and the notifying means to perform the side monitoring operation, and the side monitoring while determining that the traveling speed of the automobile is in a second speed range having a larger speed value than the first speed range. A side monitoring device characterized by comprising side monitoring control means for prohibiting operation.