JPS63244299A - Parking alarm - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention: "Industrial Application Field" The present invention provides a warning horn for encouraging the movement of vehicles in order to allow vehicles to pass through ponds when vehicles are parked on the road for loading and unloading cargo, etc. Install a parking alarm system that can receive sound at a distance from the car.

"Prior Art" Conventionally, when delivering cargo using a car, the car is parked on the road and the cargo is loaded and unloaded. If the road where you park is wide, parking will not affect the traffic of other vehicles in any way, but if you park on a narrow road such as an alley, for example, you may obstruct the traffic of other vehicles. often occurs.

Particularly when it is necessary to leave a parked car, the sound of horns from other passing vehicles continues for a long time, causing problems in the neighborhood.

"Problems to be Solved by the Invention" The present invention provides a way to reliably know the sound of a horn that prompts other vehicles to move when parked on the street, even if the vehicle is far away from the vehicle. This is an attempt to prevent the nuisance of honking horns from causing a nuisance to the neighborhood.

In order to solve the above-mentioned problems, the present invention provides a microphone means for converting sound into an electrical signal, and a band-pass filter connected to the microphone means for selecting and outputting a desired frequency component. circuit, a pulse oscillation circuit, a gate circuit connected to the bandpass filter circuit and controlling conduction by a signal from the pulse oscillation circuit, and a first monostable connected to the gate circuit and outputting a first set time signal. A multivibrator, a second monostable multivibrator that outputs a second set time signal, an AND operation circuit connected to the first and second monostable multivibrators, and a signal from this AND operation circuit to set the time. a low frequency oscillation circuit that outputs a frequency signal of a setting, a high frequency oscillation circuit that outputs a set high frequency signal, a modulation circuit that modulates a signal from the high frequency oscillation circuit with a signal from the low frequency oscillation circuit, and a modulation circuit that modulates the signal from the high frequency oscillation circuit with a signal from the low frequency oscillation circuit; It consists of a transmitter, which serves as a transmitting circuit, and a receiver.

``Example'' The parking warning device according to the present invention will be described based on the drawings. FIG. 1 is a block diagram of an embodiment of a transmitter of a parking warning device according to the present invention, and FIG. 3 is a block diagram of an embodiment of a receiver of the same parking warning device. A microphone 2 that receives the horn sound from the vehicle uses an amplifier to appropriately amplify the horn sound signal. 3 is a band pass filter that selects and passes only the signal component of the horn sound from other vehicles (as shown in FIG. 2, the horn sound is regulated to have a required frequency). 4 is a pulse oscillation circuit which outputs a pulse signal every 0.2 seconds, for example. 6 is a gate circuit, which sends the signal from the filter 3 to the pulse oscillation circuit 4.
Sampling is performed using a pulse signal. Reference numeral 6 denotes a ridrigger type monostable multivibrator, which is set to output a time-open signal slightly longer than 0.2 seconds, for example.

Reference numeral 7 denotes a ridrigger type monostable multivibrator, which is set to output a leap signal of 0.6 seconds, for example.

8 is an AND operation circuit, which is connected to the multivibrator 6.7. Reference numeral 9 denotes a low frequency oscillation circuit which responds to the signal from the AND operation circuit 8 and outputs, for example, a signal of lKH2. 10 is a modulation circuit which frequency-modulates or amplitude-modulates the signal from the high-frequency oscillation circuit 11 that outputs 80 MHz, for example, at IKHz from the low-frequency oscillation circuit 9;
12 is a transmitting circuit.

13 and 14 are transmitting and receiving antennas.

I5 is a tuned/high frequency amplification circuit which is tuned to a required frequency and amplifies the signal. 16 is a mixer circuit, which converts the signal into an intermediate frequency signal at the local oscillation frequency from the local oscillation circuit 17, and outputs a modulated signal from the intermediate frequency amplification/detection circuit 18. A band pass filter 19 selects a modulated low frequency signal (I KHz), amplifies it in an amplifier circuit 20, and then outputs it as an alarm sound from a speaker 21.

"Operation" In the above configuration, in order to load and unload cargo, the user parks the car on the road, turns on the transmitter, and leaves the car with the receiver in hand. Since the vehicles in the pond are parked and cannot pass through, the sound of horns from other vehicles is received by microphone L, and the signal from microphone L is used to encourage the vehicles to move. is suitably amplified by an amplifier circuit 2, and a bandpass filter 3 selects and outputs only the frequency components of the horn sound. On the other hand, the pulse oscillation port ga4 outputs a pulse signal every 0.2 seconds, and the signal of the selected horn sound is sampled by the band pass filter 3 via the gate circuit 5. This sampled signal is applied to a monostable multivibrator 6.7 of the ridriger type, and in the multivibrator 6,
For example, since the signal output time is set to a time slightly longer than 0.2 seconds, the output of the multivibrator 6 is maintained as long as the horn continues for 0.2 seconds or more. On the other hand, the multivibrator 7 has a signal output time of 0, for example.
．． Since the value is set to 6 seconds, the logical product operation circuit 8 has an information that when the horn continues for 0.5 seconds or more, the multivibrator 6 is re-triggered three times to maintain the output, and the multi-vibrator 6 is re-triggered three times to maintain the output. The condition is met by the output of Tough, and a signal is output. The signal from the AND operation circuit 8 acts on the low frequency oscillation circuit 9 to output a signal of, for example, IKHz, and the signal from the high frequency oscillation circuit 11, for example, 8.
The 0MH2 signal is frequency modulated or amplitude modulated, amplified by the transmitting circuit 12, and then transmitted via the antenna 13 as a weak radio wave.

On the other hand, the transmitted signal is received by the antenna 14, selected and amplified by the tuning and high frequency amplification circuit, mixed with the local oscillation frequency from the local oscillation circuit 17 by the mixer 16, and converted into an intermediate frequency signal. , the signal processed and detected by the intermediate frequency amplification/detection circuit 18 is passed through a band pass filter 19, where a modulation signal IKHz is selected and output. This IKHz signal is amplified by an amplifier 20 and then outputted from a speaker as an alarm signal, warning that another vehicle is approaching and that a parked car is moving.

"Effects" As explained above, the parking warning device according to the present invention has the following effects:
This system detects the sound of horns from other vehicles and sends out a warning using weak radio waves, allowing the driver to receive the warning using a receiver. If you do so, please ensure that your request to move your parked car is
And it can be done immediately.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the transmitter of the parking warning device according to the present invention, Fig. 2 is an explanatory diagram of a band pass filter, and Fig. 3 is a block diagram of an embodiment of the receiver of the parking alarm device. It is. In the figure, l is a microphone, 3 is a bandpass filter, and 4
is a pulse oscillation circuit, 5 is a gate circuit, 6°7 is a monostable multivibrator, 9 is a low frequency oscillation circuit, IO is a modulation circuit, 11 is a high frequency oscillation circuit, 12 is a transmitting circuit, 15 is a tuning/high frequency amplification circuit, 6 is a mixer, 17 is a local oscillation circuit, 18 is an intermediate frequency amplification/detection circuit, 19 is a band pass filter, 2o is an amplifier circuit, and 21 is a speaker.

Claims (1)

[Claims] a microphone means for converting sound into an electrical signal; a bandpass filter circuit connected to the microphone means for selecting and outputting a desired frequency component; a pulse oscillation circuit; and a signal from the pulse oscillation circuit connected to the bandpass filter circuit. a first monostable multivibrator connected to the gate circuit and outputting a first set time signal; a second monostable multivibrator outputting a second set time signal; An AND operation circuit connected to the first and second monostable multivibrators, a low frequency oscillation circuit that outputs a set frequency signal based on the signal from this AND operation circuit, and a high frequency oscillation circuit that outputs a set high frequency signal. A parking alarm device comprising: a modulation circuit that modulates a signal from a high-frequency oscillation circuit with a signal from a low-frequency oscillation circuit; a transmitter and a receiver that serve as a transmission circuit that transmits the modulated signal.