JPS58123199A - Advance/retreat detector for vehicle - 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 The present invention mainly relates to detection of vehicle entry and exit from gas stations, parking lots, parking lots, and the like.

Conventionally, for example, as a vehicle entry/exit detection device at a gas station, it is dangerous to use an electric switch such as a photoelectric switch or an ultrasonic switch directly at the vehicle detection position, so in general, liquid or A vehicle entry/exit detection device is used in which a pressure detection element is attached to one end of a flexible hose filled with air. The entry and exit of a vehicle is detected by the output, but in this case, with a method in which the hose is filled with liquid, pressure changes can be easily transmitted to the pressure detection element at one end of the hose, which is located far away. In addition to malfunctions due to changes in internal pressure due to changes in pressure, the structure of the entire device is complicated and expensive because it uses liquid as a medium.In addition, the system in which air is sealed in the hose is not easy to handle. On the other hand, pressure fluctuations are significantly attenuated midway through and are transmitted to the pressure detection element at one end of the hose, which also has the disadvantage that malfunctions are likely to occur due to changes in internal pressure due to changes in temperature. In order to prevent the effects of changes, connecting each hose to the atmosphere will reduce the pressure fluctuations within the hose when the hose is contaminated with vehicle stains. There was a drawback that it was extremely difficult to transmit the information to the pressure detection element.

An object of the present invention is to provide a vehicle entry/exit detection device that detects the sound of a vehicle running onto a pipe including flexible and non-flexible pipes by using a sound pressure sensor attached to the pipe. The object is to eliminate the above-mentioned conventional drawbacks.

Next, the configuration of an embodiment of the present invention will be explained with reference to the drawings.

As shown in Figure 1, vehicle entrances and exits 4, 5, and 6, which are formed by placing curb stones 5 at a gas station 2 installed at a corner lot of a road, are provided with entrances and exits 4, 5, and 6 that are stepped on by vehicle tires when entering and exiting the road. Pipes including combustible and non-RJm properties, in this case, flexible hoses Hm1 to Hm3 that are relatively thick and can quickly return to a circular cross-sectional state even if broken. llB1~HB3
are installed in parallel via a hose spand (not shown) and an anchor bolt so that the IC is stepped on by the tire,
These hoses 1 to 3 and H111 to H115 are connected in series via transmission pipes 7 and 7B for the road 1111 and the gas station 211, respectively, and are guided to the relay box 9 on the back side of the firewall 8. , road hoses formed by the transmission pipes 7 of the transmission pipes 1 to 3 of the road 161, and the stand side hoses formed of the transmission pipes 7B and each of the hoses 1111 to 111m3 of the gas station 211. At the inner end of the relay box 9 of the HB, there is a second
As shown in the figure, a capacitor miter M as a sound pressure element
MII is installed.

Next, Fig. 5' shows the electrical circuit of this practical example IIIA, showing the output from the capacitor microphone MII of the road shaft hose II and the condenser lighter MII of the stand side hose 1111.
The output from each channel L1 to L6 and the output from the sensor C
A filter circuit 1° consisting of C1 to C5', a capacitor C4,05, and a Darlington-connected filter circuit pTrl to
Tr4, capacitor C6°C7, D4 circuit Nando Summer 1rD1. Nmu ID2, Invar #1NT1. XMT
NAND5~lA11D through each of 2 and
10 formed flip-flops Fr and rymc are input, and the outputs from the flip-flops FF and FFB are input to an entry/exit discrimination circuit that determines whether a vehicle is entering or exiting according to the output order, in this case, each NAND MA11D.
11-IIA) ID14, Impatae NT5. INT
4, a resistor R1, and a capacitor WaS.

The output from the entry/exit discrimination circuit 11, which inverts the output when a vehicle enters, consists of a diode D1, a resistor R2, a capacitor C9, and an inverter xM〒5゜IN? It is input to the relay circuit 15 via a timer circuit 12 consisting of Darlington-connected transistors Tr5. Relay RL1 is operated via TF6, and buzzer IIz1 is operated via its normally open contact RL1a for a fixed time period determined by the OR timer of time limit circuit 12. In addition, after the fixed time limit of previous v3 time limit circuit 12 has elapsed, diode D2 is activated. ~D5, resistors R5, R4, capacitors 010~C12, NAND NM1 ID15, inverter IN〒7, XN〒8, the timer circuit 14 is activated,
After a certain period of time of this operation, each 7 lip program rrr,!
')' Reset B and each flip-flop FFA, F
F! The actuating portion of 1 is connected to each light emitting diode LleD, LI
Diagnosis can be confirmed by turning on the DI.

In addition, in the figure, 15 is the power adapter 1 for the MU C100 electric wire.
Phase F
1. Power switch 8W1, switch L7. L8 and condensed t015. A power supply circuit that supplies stabilized power to each of the circuits through a power supply circuit 44 and 17 consisting of C14 and 17; 15 to R12 represent resistors forming each circuit; hereinafter, each circuit element etc. will be described as appropriate. Abbreviated using only the code.

Next, the operation of this embodiment will be explained.

In the vehicle entry/exit detection device configured as described above, if the vehicle is not entering or exiting with zero ionization, the input/output level V of each logic element in the electric gIc circuit
is as shown by Ill rIJ in FIG. 3, and the buzzer] IZ1 does not operate.

Next, when a vehicle enters from any entrance/exit in 4.5.6 in this state, first the road side hose m is crushed, and the sound generated by this crushing is transmitted between the hose m and the transmission pipe 7. It is effectively transmitted to the condenser microphone V through the internal air, and from the condenser microphone the output corresponding to the sound generated by squeezing the hose H by the vehicle is transmitted from the road surface etc. through the outer cover of the hose H. Occurs clearly distinct from other incoming sounds.

As a result, C4, Trl, Tr2. 1iA via C6
Both NDI's two power outputs become "1", the output of Frm is reversed from "0" to "1", and the LEDA lights up, etc.]
The output of 1AliD12 is inverted from "1" to "0", and the output of 1IAllD13 is inverted from "0" to "1".

Next, as the vehicle passes, the hose HB is crushed as described above, so that the output of FFB is reversed from "0" to "1" and LID II is lit, and the output of ■mu ND11 is changed from "1" to " At the same time, the output of NALID12 becomes “1” again, and the output of NALID13 becomes “0” again.
As a result, the output of IN〒3 temporarily becomes “1”, and since the output of the previous IcFF is “1”, the output of IN〒3 becomes “1”
The output of D14 is temporarily "0" and the output of IN〒4 is temporarily "1".

Therefore, 1M terrorism is xM terrorism during the time period that is the sum of the output reversal time of IN〒4 and the time period until the output of the 09, 12 time constant circuit of the time limit edge becomes below the threshold voltage of IN〒5. maintains the inverted state of the output "1" and operates the buzzer 11z1 via the relay RL1, and after the output of the NT6 is inverted to "0", the charging energy V is replenished from C10 and the C11 , R5 When the output of the time constant circuit is lower than the V1 hold voltage of shoulder ND15, first input via D5 to D5 causes
The output of 〒7 was 1-0'' in the summer when it was inverted to 1'' level.
The output of the engineering MT8 temporarily becomes "1" and each PF and FFB are reset, and all circuits return to the state III before the vehicle entered. In this return state, the vehicle Upon entry through doorway 4.5.6, the same operating forces as described above are repeated again.

Next, when the vehicle that has entered the gas station 2 in this manner exits from the arbitrary entrance/exit h& in 4.5.6, the station-side hose 51 is crushed first, contrary to the case of entering. After the output of FFII is inverted from “0” to “1”, the output of Fr is inverted from “0” to “1”, and NA
When the output force of ID11 is inverted from "1" to "0", the input from the FF of Inm1D12 is "1" from iJ.
, the output of wing mod MD 12 is 11 of "1".
Therefore, the buzzer 11z1 does not operate, and D5. yT7 by input via D4
Since the output of the capacitor microphone is inverted to "1", the output from the condenser microphone M and MB disappears, and the time constant of C11 and R5 is
The output of the ik circuit is lower than the Schereshi 1 hold voltage of the ym ND15 (the output of the IMT7 is again inverted to "0", and the output of the IN〒8 is temporarily changed to "1"). Therefore, the vehicle entry/exit detection device does not operate the buzzer BZ1 in the case of vehicle exit, and all circuits are connected to vehicle exit 1. When the vehicle returns to the above state and enters or exits from any entrance/exit 4, 5, or 6 in this state, the same approach or exit operation as described above is repeated.

Next, FIGS. 4 and 5 show the hoses H and H of the above embodiment.
B, capacitor miter M, and Mll detect the distance between the vehicles, and the bathtub 2 is connected via pipe 18 and capacitor miter 19.
This is an example in which the dry battery 1 is used as a power source when used for level detection to detect the amount of water poured into the water, and in this case,
By moving the control panel main body 22 from side to side via the wing nut 21, the control panel 2! Attach the control panel main body 22 to the bathtub 20 together with S, and attach the lower end of the pipe 18 to the ring-shaped frame 24 formed at the tip of the bracket 25 through the elastic force applied to the frame 24. By adjusting the pipe 18 up and down to match the required amount of water to the taper position, water is injected in this state and when the water reaches the bottom end of the pipe 18, the bottom end of the pipe 18 is electrified by the water, and the sound at this time is captured by a condenser microphone. 19 is detected, the flipflop 1i'FC of FIG. stops.

It should be noted that when the water level reaches the lower end position from the upper part of the pipe 18, it operates in the same manner as described above, and in this way, any microphone including a condenser microphone can be attached to any flexible or non-flexible pipe including a hose. By attaching a microphone and detecting the sound transmitted only through the air inside the pipe,
In addition to the methods described above, the method for detecting vehicles and water can also be used for detecting the presence or absence of a workpiece at the lower end of a pipe for automatic door foot switches or for industrial use.

Next, the effects of the present invention will be explained.

The present invention provides a sound pressure sensor that detects changes in the sound pressure inside the pipes when a vehicle runs into or out of at least two pipes on the floor surface of a vehicle entrance and exit, and when a vehicle runs over each pipe. is installed, and further provided with a discrimination circuit that discriminates whether a vehicle is entering or exiting based on the order in which outputs are generated from the sound pressure sensors for each pipe, and an alarm that notifies at least the entry of a vehicle based on the output from the discrimination circuit. A vehicle entry/exit detection device is provided.

As a result, the present invention has a simple structure, is easy to use, and can detect the entry of a vehicle in a stable state without being influenced by changes in the atmosphere.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the usage state of one embodiment of the present invention, Fig. 2 is a detailed view of its main parts, Fig. 5 is its electric circuit diagram, and Fig. 4
The figure is a front view of another embodiment of the present invention, and FIG. 5 is a schematic diagram of its electrical diagram. 4.5.6--Entrance/exit 11-Entry/exit discrimination circuit Hm, H1m-Hose M1M--Condenser microphone 11Z1--Buzzer

Claims (1)

[Claims] At least two pipes are installed in parallel on the floor of the vehicle entrance/exit so that the vehicle can run onto it in the order of its traveling direction when the vehicle enters or exits, and each pipe has a sound pressure inside the pipe that is measured when the vehicle runs over the vehicle. A sound pressure sensor for detecting changes is installed, and a discrimination circuit for determining whether a vehicle is entering or leaving based on the order in which outputs are generated from each pipe-specific sound pressure sensor;
1. A vehicle entry/exit detection device, characterized in that the vehicle entry/exit detection device is provided with an alarm that notifies at least the entry of a vehicle based on an output from a direction determining circuit.