JPS62140087A - Vehicle invasion alarm - Google Patents

Abstract

PURPOSE:To enable system checking as an alarm, by providing a sensor circuit detecting the moving matter in a vehicle upon the reception of the signal from an ultrasonic transmitter-receiver and a system checking means. CONSTITUTION:An alarm main body A is equipped with a sensor circuit 2 detecting the moving matter in a vehicle upon the reception of the signal from an ultrasonic transmitter-receiver and a system checking means consists of a timer circuit 3, an exclusive OR gate 4, an AND gate 5, a display device 6 displaying that the main body A functions normally and an alarm 7. If the detection signal corresponding to the movement of a driver is present when the output of the circuit 3 is at L-level, the exclusive OR gate 4 outputs a H-level signal to display that the main body A is normal. When a detection signal is outputted from the main body A after the output of the circuit 3 has gone to a H-level after the time-limit operation of the circuit 3, it is judged that there is an invader on the basis of the signal from the AND gate 5 to operate the alarm 7. By this method, the checking of the system can be performed while in use.

Description

[Detailed Description of the Invention] [Technical Field 1] The present invention sends ultrasonic waves into the interior of a vehicle, detects the Doppler component included in the reflected waves in the event of a moving object, and alerts intruders to the interior of the vehicle. This relates to an ultrasonic vehicle intrusion warning device that emits an alarm.

[Background technology J This type of vehicle intrusion using ultrasonic waves has conventionally been used? In the case of a warning device, an abnormality in the main body of the warning device, which is an ultrasonic sensor, would cause the device itself to lose its function6. Some abnormalities in the ultrasonic sensor include damage to the ultrasonic transducer, disconnection of the connecting cable, short circuit, and a sound absorber or reflector attached to the front of the ultrasonic transducer, causing the ultrasonic wave to be transmitted. This may include items that are in a state where they cannot be delivered. Damage to the ultrasonic transducer and disconnection or short circuit of the connecting cable can be detected by detecting the impedance value of the ultrasonic transducer or the level of the output signal of the exciter that excites the ultrasonic transducer. However, as in the case where a sound absorber is attached to the front of the ultrasonic transducer, the alarm body itself is working, but it cannot detect a state in which it cannot detect a moving object, and a true system check is not possible. I wasn't able to do it.

[Objective of the Invention 1] The present invention has been provided in view of the above-mentioned points, and detects not only abnormality in the circuit of the main body of the warning device, but also abnormality in the overall operation of the main body of the IF warning device, and can be used as a warning device. The present invention provides a vehicle intrusion warning device for the purpose of performing system checks.

DISCLOSURE OF THE INVENTION 1 (Example 1) Hereinafter, an example of the present invention will be described with reference to the drawings. Figure 1 shows a block diagram, and Figure 2 (!l shows the time chart in Figure 1.Ultrasonic waves are sent into the car, and when there is a moving object, the Doppler component contained in the reflected wave is detected. The ultrasonic warning device body A that detects moving objects includes an ultrasonic transducer 1 that disables the transmission and reception of foot sound waves, and a signal from the ultrasonic transducer 1 that detects a moving object. It consists of a sensor circuit 2 that detects moving objects inside the vehicle, such as the driver, fellow passengers, and even intruders.System check means is used to check whether the main body A of the g-weapon is working properly. These include a timer circuit 3, exclusive or date 4, and date 5, a display 6 that indicates that the alarm body A is working normally, and an alarm 7 that detects an intruder and issues an IF alarm. Note that points a to d in FIG. 1 correspond to (a) to (d) in FIG. 2, respectively.

Now, when the system is set, power is supplied to each part, and when a set signal is input to the timer circuit 3, the timer circuit 3 is activated. This timer circuit 3 has a delay so that it does not issue an alarm to the outside even if the driver is detected until the driver sets the system, that is, the warning device body A, and exits the vehicle. . If the Nanawa Tsuru and warning device body A are normal, they will always detect the movement of the driver, passenger, etc., so while the timer circuit 3 is working, it will be 1! Alarm body A
'1' If the movement of the driver etc. is detected,! The display B6 indicates that the main body of the weapon A is normal. Figure 2 (a) is! These are detection signals from the main body A of the weapon, where ■■ is a detection signal corresponding to the movement of the driver, and ■ is a detection signal for an intruder. When timer circuit 3 is operating,
As shown in FIG. 2 (11), the output of the timer circuit 3 is at the L level, and when there is a detection signal corresponding to the driver's movement when the output is at the L level, the exclusive or The output of date 4 outputs an H level signal to the display 6 as shown in FIG.
The display 6 indicates that the condition is normal. Note that when the timer circuit 3 is operating, its output is at L level, so the output of AND gate 5 is at L level, so even if a driver or the like is detected, the alarm 7 will not issue an alarm. .

After the time limit operation of the timer circuit 3, when the output of the timer circuit 3 becomes H level, if there is a detection signal ■ from the main body A of the alarm, the H level is detected from AND date 5 to #fJ2 as shown in Figure (d). A signal is output, this signal is determined to be an intruder, and the alarm device 7 outputs an alarm. This alarm is notified by sound or light. Here, if the 11th alarm body A is not working properly and there is no output at point a, there will be no indication on the display 6 that it is normal, so the driver should You realize that something is abnormal. In this embodiment, when the alarm body A is normal, it is displayed to indicate that it is normal, but conversely, only when the alarm body A +,::'f4 abnormality is detected, an output is output and an abnormality is displayed. It may also be possible to display that it is. This embodiment will be explained next.

(Embodiment 2) FIGS. 3 to 5 show another embodiment, in which a notification is made only when there is an abnormality in the main body A of the warning device as described above.

In this embodiment, 1! during the delay time in the timer circuit 3! Even if the detection signal is output from the alarm body A, no alarm output will be output, but if the alarm body A detects movement after the delay time, the alarm 7 will issue an alarm, which is the same as in the example of the song. be. Therefore, only the system check means will be explained here. The system check means is the timer circuit 3
．． 7 lip 70 tube 8, and date 5, 9, alarm 7
, 10, etc. still,! @Figure 3 a2b,
The waveform at point erLd is aHb+e, f in Figures 14 and 5.
Each corresponds to td.

The timer circuit 3 starts working in response to the set signal, and at the same time, the 7 lip 70 knob 8 is set. During the delay time of the timer circuit 3, when the yi device main body up detection signal is output as shown in Figure 4 (a) of PItJ4, the 7 lip 70 knob 8 is reset as shown in Figure 4 (c) and the output is Even if the output of the timer circuit 3 becomes the L level and the output of the timer circuit 3 becomes the H level after the delay time, no signal is output to the output f of the AND gate 9 as shown in FIG. 4(d), and the alarm 10 does not work. . However, as shown in Figure 5(a), even though the IF weapon body A has malfunctioned and the driver is still in the car, no signal is output from the output a, the 7s 2b 70 As shown in FIG. 5(b), the knob 8 remains set at the system cent time and remains at the H level.

Therefore, when the output of the timer circuit 3 becomes H level as shown in Figure 5()+) after the delay time by the timer circuit 3, the output of the AND date 9 becomes H level as shown in Figure 5(f). The alarm 10 will notify that the W-weapon main body A is abnormal. In addition, here are the warnings for intruders and the warnings for abnormalities in the alarm body A. Although they are separated by PN units 7 and 10, they may be the same.

[Effect of the invention 1] As described above, the present invention transmits ultrasonic waves into the interior of the vehicle, detects the Doppler component included in the reflected waves when there is a moving object, and issues an alarm to intruders inside the vehicle. Ultrasonic vehicle intrusion warning devices that emit ultrasonic waves detect the movements of the driver, passengers, etc. from the time the warning device is set and activated until it enters the warning state using the output signal from the warning device. ,
Since the system check means is installed in the main body of the warning device to inform whether or not the main body of the warning device is normal without issuing an alarm, the system check means receives the output signal from the main body of the warning device and allows the driver or By detecting the movements of passengers, etc., and notifying whether the warning device itself is normal or not without issuing an alarm, it is possible to reliably detect vehicle intrusion under actual usage conditions without adding any other special circuits. This has the effect of making it possible to check the system of the warning device.

[Brief explanation of drawings]

Fig. 1 is a block diagram of one embodiment of the present invention, Fig. 2 is a time chart of the same as above, Fig. 3 is a block diagram of another embodiment of the same as above, and Figs. 4 and 5 are time charts of the same as above. be. Δ indicates the ffff1 vessel body. Agent Patent Attorney Ishi 1) Chief 7 Figure 1 Figure 2 Procedural Amendment (Voluntary) February 22, 1986

Claims (3)

[Claims] (1) In an ultrasonic vehicle intrusion warning device that sends out ultrasonic waves into the vehicle interior, detects the Doppler component contained in the reflected waves when a moving object is present, and issues a warning to intruders entering the vehicle interior. After the warning device is set and activated, until the warning state is reached, the movement of the driver, passenger, etc. is detected by the output signal from the warning device, and the warning device operates normally without issuing an alarm. A vehicle intrusion warning device characterized in that a system check means is provided on the main body of the warning device to notify whether or not the vehicle has entered the vehicle. (2) A patent characterized in that when a moving object is detected between the time when the main body of the alarm device is set and the time when the main body of the alarm device is in the alert state, a sound or light is used to notify that the main body of the alarm device is working normally. A vehicle intrusion warning device according to claim 1. (3) If a moving object is not detected between the time the alarm body is set and the alarm state is reached, a sound or light is used to notify that the alarm body is not working properly. A vehicle intrusion warning device according to claim 1.