JPH087510Y2 - Door sensor alarm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention detects the entry and exit of a person by a plurality of sensors,
The present invention relates to a door sensor alarm that emits different voice messages depending on the movement of people.

(Prior Art) Conventionally, there is known a door sensor alarm which is provided at a storefront of a store and detects the entry and exit of a person and outputs a voice message corresponding to the entry and exit of the person.

This kind of door sensor alarm usually has multiple sensors,
For example, two infrared sensors are used, and it is configured to detect a person approaching or being present by these sensors, and output different sounds depending on the state of the person. Further, the passing direction of a person can be determined, and in this case, a sound is generated according to the passing direction of the person.

(Problems to be solved by the invention) However, in the conventional door sensor alarm described above, for example, when two sensors are used, when an attempt is made to detect a passing direction of a person between the two sensors, a detection between the two sensors is performed. The area becomes wider as the distance from the sensor increases, and depending on the mounting position of the sensor, when detecting a person passing between the sensors, the sensing time will vary unevenly, resulting in erroneous determination. As a result,
There was a malfunction that caused a malfunction.

Therefore, an object of the present invention is to provide a door sensor alarm capable of preventing erroneous determination due to nonuniform passing speed by allowing the passage time detected by the sensor to be set arbitrarily.

(Means for Solving the Problems) The door sensor alarm of the present invention is a latch circuit that latches sensor signals from a plurality of sensors that respectively detect the passage of a person, and the plurality of sensors. A traveling direction determination circuit that outputs a traveling direction signal based on a sensor signal, counts the time from the first sensor signal to the next sensor signal by the plurality of sensors, and compares the time in a preset storage unit. Based on the outputs of the time determination circuit that outputs a time-over signal, the switch circuit that instructs the storage unit to set the passage time between the plurality of sensors, and the traveling direction determination circuit, the time determination circuit, and the switch circuit, And a voice signal selection circuit that outputs different corresponding voice signals.

(Operation) First, when the switch circuit is set, the voice signal selection circuit outputs, for example, a voice signal "Set", and in this state, a person crosses in front of multiple sensors at a constant speed. Then, this time is stored in the storage unit as the set time, and after that, the voice signal selection circuit outputs a voice signal, for example, "setting is completed".

When a person crosses in front of multiple sensors with the setting completed, these sensor signals are respectively latched by the latch circuit, and the time determination circuit counts the time from the first sensor signal to the next sensor signal. , Is compared with the set time in the storage unit. Then, when the count time is within the set time, the first sensor signal is output to the voice signal selection circuit, for example, a voice signal "Welcome" is output. If the person is passing in the opposite direction, a voice signal "Thank you" is output by the same process as above.

It should be noted that if the count time exceeds the set time, it is different from the expected situation and the sensor signal is not output.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In the door sensor alarm 1 of this embodiment, as shown in FIG. 1, the infrared sensors a and b and the direction of movement of a person who crosses in front of these sensors a and b is the direction A (sensors A to B).
Direction), or a B direction (from sensor B to A), a direction determination circuit 3, a voice synthesis circuit 5 that synthesizes different voices based on the determination outputs V _{1 to} V ₄ of the direction determination circuit 3,
It is configured by a speaker drive circuit 9 which drives the speaker 7 by the voice output of the voice synthesis circuit 5. The first
In the figure, 11 is a clock generator for generating a clock signal, S ₁
Is a set switch, and S ₂ is a speed setting switch.

As shown in FIG. 2, the direction determination circuit 3 includes a latch circuit.
13, a traveling direction determination circuit 19, a time determination circuit 35, a switch circuit 63, an audio signal selection circuit 77, a reset circuit 91 and the like.

The latch circuit 13 is connected to flip-flops 15 or 17 which operate based on the outputs from the sensors a and b when they cross the front of the sensors a and b, respectively.

The traveling direction determination circuit 19 has a one-shot multivibrator 21 or an output side of each flip-flop 15 or 17.
AND circuit 25, 29 and flip-flop 27,
A priority sequence circuit 33 composed of 31 is provided, and both sensors a,
The flip-flop 2 on the sensor side that operated first in b
The traveling direction signal A or B is output according to the output of 7 or 31. The traveling direction signal A is emitted when a person passes from the sensor a to the sensor b. A person is the sensor b for the traveling direction signal B.
Emitted when passing from to a.

The time determination circuit 35, the flip-flop 15 or
Ex that operates when there is output from one of 17
An OR circuit 37 and an AND circuit 39 that operates when outputs of both flip-flops 15 and 17 are provided. Ex above
The OR circuit 37 includes an OR circuit 41, a delay circuit 43, and an AND circuit.
45 are sequentially connected, and the AND circuit 45 is connected to the AND circuit 47.
A storage counter (storage unit) 49 is connected through the, and a down counter 53 is connected through an AND circuit 51. The output side of the OR circuit 41 is an AND circuit 55.
And it is connected to the preset terminal of the down counter 53 through the one-shot multivibrator 57. Further, the output side of the AND circuit 39 is connected to an AND circuit 79 described later via a one-shot multi-vibrator 59.

The switch circuit 63 has a set switch S ₁ and a speed setting switch S ₂ , and a flip-flop 65 is connected to the set switch S _1. The output side of the flip-flop 65 has the above-mentioned AND circuits 47 and 51. On the other hand, it is connected to AND circuits 79 and 87 described later. In addition, this output side is connected to the reset terminal of the storage counter 49 and the audio signal through the one-shot multivibrator 67.
It is connected to the V ₃ terminal, and when the set switch S ₁ is turned on, an audio signal “Set” V ₃ is issued. The speed setting switch S ₂ is connected to the set terminal of the flip-flop 69, while the knot circuit 71 and the OR circuit are connected.
It is connected to the reset terminal through 73. The symbol PC in the figure indicates a power-on clear signal that clears each circuit when the power is turned on. The output Q side of the flip-flop 69 is connected to the AND circuit 55, and the output side is connected to later-described OR circuits 85 and 93 through the one-shot multivibrator 75. After the set switch S ₁ is turned on, the two sensors a are turned on. When it crosses in front of and b, the time between them is recorded in the counter 49, and after the set time (speed) ends, a voice signal V ₄ "Set finished" is issued. Alternatively, after setting switch S ₁ is turned on, speed setting switch S ₂
When is turned on, the on-time of S ₂ is set as the set time.

The audio signal selection circuit 77 has an AND circuit 79, an AND circuit 81 or 83 operated by the output A, B of the flip-flop 27 or 31, an OR circuit 85, and an AND circuit 87. The output A of one flip-flop 27 produces a voice signal V ₁ "Welcome to you" and the output B of the other flip-flop 31 produces a voice signal V ₂ "Thank you".

The reset circuit 91 has an OR circuit 93, a delay circuit 95, a one-shot multivibrator 97, a knot circuit 99, and an OR circuit 101. Depending on various cases, the OR circuit 1
A PC signal that clears each circuit is output from 01.

Next, the operation of the door sensor alarm having the above configuration will be described.

First, when the set switch S ₁ is turned on, it is output from the Q terminal from the flip-flop 65.
The AND circuit 79 becomes inoperative, and even if the direction signals A and B are output, the audio signals V ₁ and V ₂ are not emitted. At the same time, while the AND circuit 47 is in the operable state and the AND circuit 51 is in the inoperative state, the memory counter 49 is reset by the output of the one-shot multivibrator 67 and the audio signal V ₃ is output, and `` set The voice "Masu" is issued.

In this state, the transit time (speed) you want to set
Then, for example, when the sensor a is traversed in the direction of sensor b, that is, in the direction of A, in front of these sensors, the passing time is stored in the storage counter 49 as the set time and, at the same time, via the AND circuit 39 and the AND circuit 87. The V ₄ signal “setting is completed” is output, and the flip-flop 65 is reset via the OR circuits 93 and 101.

In addition, the speed setting switch S ₂ sets the time that the person presses it even if the person does not actually pass it. The output of the OR circuit 41 is "H" by pressing S ₁ and then S _2. Then, the clock φ is input to the counter 49 via the AND circuit 47, and the time is stored. When S ₂ is released, the flip-flop 69 is reset via the inverter 71 and the OR circuit 73, the output becomes H level, a pulse is generated from the one-shot multivibrator 75, and the V ₄ signal is generated as described above. Then, the flip-flop 65 is reset.

After the setting is completed, when a person passes through the sensors a and b in this order from the direction A, the output of the flip-flop 15 of the sensor a causes the AND circuit 55 and the one-shot multivibrator 57.
Through, the down counter 53 loads the data stored in the counter 49, and the down counter 53 starts down counting through the AND circuits 45 and 51. The down counter 53 outputs an H level signal when the count reaches zero. Next, the flip-flop of sensor b
By the output from 17, the V ₁ signal “Welcome” is output via the AND gates 79 and 81 which are in the open state via the AND circuit 39 and the one-shot multivibrator 59. When the count value of the down counter 53 becomes zero and an H level signal is output, the AND circuit 79 is closed and no audio signal is output, and the flip-flops 15, 17, 27 are output via the one-shot multivibrator 97. , 31
Is reset.

On the contrary, when the bit walks in the B direction,
The B signal is output to the AND circuit 83, and the V ₂ voice signal “Thank you” is issued.

(Effect of the Invention) As described above, according to the present invention, the minimum transit time is set by the switch circuit, and when the actual person passes, the actual transit time is counted and compared with the set time, and the actual transit time is set. Only when the time is shorter than the set time, the sound signal based on the first sensor signal of the multiple sensors is output, so there is no malfunction as in the past due to unnecessary passage, and the set time is also set. It can be set arbitrarily, and the set time can be easily changed and set.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a schematic configuration diagram of a door sensor alarm, and FIG. 2 is a circuit diagram showing a direction determination circuit. 1 ... Door sensor alarm 13 ... Latch circuit, 19 ... Travel direction determination circuit 35 ... Time determination circuit, 49 ... Storage unit 63 ... Switch circuit, 77 ... Voice signal selection circuit a, b ... Sensor, V _{1 to} V ₄ ...... Voice signal

Claims (1)

[Scope of utility model registration request] 1. A latch circuit for latching sensor signals from a plurality of sensors for respectively detecting passage of a person, and a process for outputting a traveling direction signal based on a sensor signal output first from the plurality of sensors. A direction determination circuit, a time determination circuit that counts the time from the first sensor signal to the next sensor signal by the plurality of sensors, compares the time of a preset storage unit, and outputs a time-over signal; Switch circuit for instructing the storage unit to set the passage time between the sensors, and a voice signal selection circuit for outputting different voice signals corresponding to the situation based on the outputs of the traveling direction determination circuit, the time determination circuit and the switch circuit. A door sensor alarm characterized by having and.