JP2608834B2 - Moving person detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving person detecting apparatus of the type which measures the height of a person passing through an entrance such as a passage and outputs a detection signal when the height is higher than a predetermined reference value. When a failure occurs in the device, the device can be immediately notified of the failure, so that a quick and appropriate countermeasure can be taken.

[0002]

2. Description of the Related Art The invention of Japanese Patent Application No. 3-114194 has been proposed as an invention capable of separating and counting individual persons from a group of persons passing through an entrance of a building or the like in a dense state. In addition, even when the mover moves alone at the entrance / exit, this can naturally be detected.

As shown in FIG. 6, a distance meter (13) is provided on the ceiling (11) of the entrance of the passage (1) to measure the distance to the target point by receiving the reflected light of the light applied to the space below. ) Is provided, and the output of the distance meter (13) is applied to a control circuit (3) incorporating a microcomputer (hereinafter, referred to as a microcomputer). Further, a level setting device (39) and a display device (4) are connected to the control circuit (3).

Next, a description will be given of the above-described prior art moving person detection operation. First, the minimum height of the moving person to be detected is set by the level setting device (39), and a start switch (not shown) is turned on. When the moving person (M) passes through the entrance (A) of the passage (1), the distance between the head of the moving person (M) and the distance meter (13) is measured by the distance meter (13). Then, the height D of the moving person (M) determined as the difference between the measured distance R and the installation height S of the distance meter (13) stored in advance in the microcomputer of the control circuit (3) is calculated. If D is greater than the minimum height set by the level setting device (39), the count value of the mobile (M) is increased and the count value is displayed on the display (4). A function unit of the microcomputer for storing the distance from the distance meter (13) to the floor surface or a function unit instead thereof (for example, a dip switch type setting device) is hereinafter referred to as a “height setting device (31)”. That.

However, in the above prior art,
Even if the rangefinder (13) or the electronic circuit for processing its output is faulty, the occurrence of the fault cannot be found quickly,
There has been a problem that the mobile (M) is left uncountable for a long time in a state where counting of the mobile (M) is impossible, so that prompt and accurate measures cannot be taken when the trouble occurs. That is, the indicator (4) is
3) In many cases, the indicator is turned on when the detector is operated because it is often installed in a control room etc. at a location away from the entrance (A) where the In such a case, the user mistakenly recognizes that the entire apparatus is in a normal operation state. Therefore, even if the range finder (13) or the like is out of order, it cannot be immediately detected, and the above-mentioned prompt measures cannot be performed. [Regarding the invention of claim 1] The invention of claim 1 has been made in view of the above-mentioned point, and is described as "Migrating through a monitoring space (M)".
The reflected light of the light irradiated from above
(M) and a distance meter (13) for measuring a distance R with the distance meter (13).
Is provided with a height setting device (31) for storing the installation height S at which the device (M) is installed, and from the installation height S stored in the height setting device (31) and the distance meter (13), the moving person (M). To determine whether the height D of the moving person (M) obtained by calculating the difference from the distance R to the moving object is within a predetermined range and detect the moving person (M). " If a part such as the distance meter (13) is out of order at the time of operation, it is necessary to promptly notify the user of the failure, so that prompt and appropriate measures can be taken. I do.

[0006]

According to a first aspect of the present invention, there is provided a technique for comparing a distance measured by a distance meter (13) at power-on and an output from a height setting device (31). A comparator (32) that outputs a failure signal when they do not match, and an alarm (33) that operates on the failure signal output from the comparator (32). "

[0007]

The above technical means operates as follows. Migrants
If the detection device is turned on and started to operate before the monitoring of (M) is started, the distance meter (13) starts measuring the distance between the detection device and the floor surface in the space below the detection device. Then, the measured distance to the floor and the stored value of the height setting device (31) (the installation height S at which the distance meter (13) is installed) are compared by the comparator (32). Then
If the distance meter (13) or the like is out of order and it does not measure the distance to the floor, that is, the installation height S of the distance meter (13) stored in the height setting device (31) and the distance If the actual outputs of the total (13) do not match, a fault signal is output from the comparator (32). Also, when the distance meter (13) does not output any signal, the two input values of the comparator (32) do not match.
A failure signal is output from the comparator (32). Then, the annunciator (33) operates according to the failure signal, thereby notifying the administrator of the device or the like that the detection device has failed.

[0008]

The invention of claim 1 has the following unique effects. When a component such as the distance meter (13) breaks down, the fault state can be quickly known by the notifying operation of the alarm (33), so that prompt and accurate treatment can be performed in the event of the fault. [Regarding the invention of claim 2] The invention of claim 2 is based on
It is an object of the present invention to notify a user of a failure of a component such as the distance meter (13) while monitoring (M).

[0009]

The technical means of the present invention for solving the above problem will be described with reference to the conceptual diagram of FIG.
The technical means of the invention of the present invention is based on "a distance for receiving the reflected light of the light radiated to the moving person (M) passing from above the passage (1) to the moving person (M) and measuring the distance R to the moving person (M). (13) and the distance meter
Height setting device (31) for storing the installation height S where (13) is installed
And the installation height S stored in the height setting device (31).
And the height D obtained by calculating the difference between the distance R from the distance meter 13 to the mobile person M is determined to be within a predetermined range, and the mobile user detecting the mobile body M is determined. The detecting device compares the installation height S of the distance meter (13) stored in the height setting device (31) with the measurement distance of the distance meter (13), and outputs a mismatch signal when the two are in a mismatch state. Output mismatch signal generation circuit (34)
A timer (T) that measures the duration of the mismatch signal and outputs a time-up signal when the time exceeds a predetermined time limit; and an alarm (33) that operates when the time-up signal is applied. ) Was provided. "

[0010]

[Operation and effect] The above technical means operates as follows.
When the distance meter (13) measures the distance to the floor of the passage (1), the measured distance and the value stored in the height setting device (31) (the distance meter)
Since the installation height S) of (13) matches, no mismatch signal is output from the mismatch signal generation circuit (34).

Next, the space below the distance meter (13) is moved by the moving person (M).
Is passed, the distance meter (13) measures the distance to the mobile (M). Then, the installation height S of the distance meter (13) stored in the height setting device (31) and the measurement distance of the distance meter (13) do not match, thereby causing the mismatch signal generation circuit (34) to The mismatch signal is output, and the timer (T) starts measuring the duration of the mismatch signal. That is, the distance meter (13)
When the user starts measuring the distance to the part other than the floor of the passage (1), the timer (T) starts measuring the elapsed time thereafter.

When the mobile unit (M) finishes passing through the space below the rangefinder (13) and the rangefinder (13) starts measuring the distance to the floor again, the measured distance is set to the height. And the mismatch signal generation circuit (34) does not output the mismatch signal, and the duration of the mismatch signal is determined by a timer (T).
Stops measuring and the whole returns to the initial state. next,
The case where the distance meter (13) or the like breaks down is described.

When the distance meter (13) or the like fails, the distance meter (13)
Outputs an abnormal value or the signal from the distance meter (13) disappears, and the output of the distance meter (13) and the height setting device (3
The value set in 1) (the installation height S of the distance meter (13)) does not match. Then, the mismatch signal is continuously output from the mismatch signal generation circuit (34), and the timer (T) starts measuring the duration as in the case where the mobile (M) passes.
Then, when the output of the distance meter (13) and the value set in the height setting device (31) do not match, the above-described state continues, and when the duration exceeds a predetermined time limit, the timer (T) is activated. Send out a time-up signal. That is, when a predetermined time limit elapses after the distance meter (13) or the like fails, a time-up signal is output from the timer (T). Then, the alarm (33) operates by the time-up signal to notify the occurrence of a failure. Therefore, quick and accurate processing can be performed based on the notification.

[0014]

Next, an embodiment of the present invention will be described.
As shown in FIG. 2, this embodiment is one in which the present invention is applied to an entrance / exit portion of a train. Entrance (A) (A) ceiling
(11) (11) are provided with distance meters (13) and (13), and outputs of the distance meters (13) and (13) are applied to a control circuit (3). Also, the control circuit (3) includes a height setting device (31) for manually setting the installation height of the distance meter (13), that is, the distance between the ceiling (11) and the floor (14), and An alarm (33) for notifying the crew member or the like of the occurrence is connected to a display (4).

The range finder (13) has a structure as shown in FIG. 3, specifically, a conversion lens (42) for converting a light beam emitted from the light emitting diode (41) into a parallel light beam, and a reflected light. Focusing lens (4
5) and further, the output of the position detecting element (44) is controlled by a control circuit (3).
And an arithmetic circuit (46) for converting the signal into a signal that can be processed by the microcomputer. Then, by the arithmetic circuit (46),
The distance between the point to be measured and the distance meter (13) is calculated.

As shown in FIG. 3, the height of a passenger (M) who enters and exits the train entrance (A) is h, the distance between the distance meter (13) and the floor (14) is S, and Let L be the distance between the measurement target point existing on the body of the moving person (M) and the conversion lens (42) and L be the conversion lens (4).
The distance between 2) and the condenser lens (45) is B, the condenser lens (45)
Assuming that the distance between the optical axis (C) and the image forming point D of the moving person (M) on the position detecting element (44) is X, and the width of the position detecting element (44) is 2A, L is as follows. Is required. The position detecting element (44) is placed at the focal point (the focal length is f) of the condenser lens (45).

Since L: B = f: X (1), L = (f · B) / X (2) On the other hand, assuming that the currents taken from the two output terminals (48) and (49) of the position detecting element (44) are I1 and I2, respectively, from the characteristics of the position detecting element (44), (I2 -I1) / ( I1 + I2) = X / A (3) Therefore, from the equations [2] and [3], L = (I1 + I2) .f.B / ((I2-I1) .A) ... [4].

Accordingly, when the measured I1 and I2 are substituted into the above equation [4], the irradiation point (measurement target point) of the light applied from the light emitting diode (41) to the moving person (M) and the distance meter (13) are obtained. The distance L between them is obtained. An arithmetic circuit indicating the distance L;
The output of (46) and the distance meter (13) set on the height setting device (31)
Installation height S (set to 2 m in this embodiment)
(The height from the floor (14) to the point to be measured) is calculated by the microcomputer of the control circuit (3). Control circuit (3)
The processing program having the contents shown in the flowchart of FIG. 4 is written in the microcomputer constituting the program, and the contents of the program will be described with reference to the flowchart of FIG.
In this embodiment, in addition to detecting the passage of the mobile (M), the number of the mobile (M) can be counted and displayed using the detection signal. . First, when a power switch (not shown) is turned on, the step of drawing code (80) is executed to determine the output of the distance meter (13), and the distance measured by the distance meter (13) is set to the height setting device (31). It is checked whether or not it is equal to the installation height S of the distance meter (13) set in (1). When these two values are not equal, it is determined that there is a failure in the rangefinder (13) and its attached electronic components, etc., and the step of drawing code (95) is executed, and the alarm (33) is operated to activate the alarm. Notify the crew room (not shown) of the occurrence of the failure. As a result, prompt and appropriate response to the failure is possible. In this embodiment, a functional unit in the microcomputer for comparing the measured distance of the distance meter (13) with the output of the height setting device (31) corresponds to the comparator (32) according to claim 1. I have. . On the other hand, as a result of performing the above steps, if it is confirmed that there is no failure in the distance meter (13) at the time of turning on the power,
The steps of the drawing symbols (81) and (82) are executed to perform an initial setting operation. That is, the number N of the movers is set to "0", the convex height memory Y1 for storing the height of the head of the mover (M) to be detected, and the timer (T) are each set to "0". set. . Next, the measurement distance of the distance meter (13) is determined in the same manner as in the above process (see the step of drawing code (821)), and this is set by the height setting device (31). If it is equal to the height S, that is, if it is determined that the mobile (M) has not yet entered or exited the entrance (A), the step of drawing code (82) is executed again, and each time the timer ( T) is reset to "0".

On the other hand, the measuring distance and height setting device of the distance meter (13)
When the output of (31) is in a mismatched state, the steps following "" described below are executed. In this embodiment, the functional unit in the microcomputer for executing the step of the above-mentioned reference numeral (821) corresponds to the mismatch signal generating circuit (34) described in the technical means of the second aspect. . . When the above steps were performed, the distance meter (13)
If the distance to the position higher than 4) is being measured, it is determined that a mobile (M) has occurred, and the steps of the drawing symbols (83) and (833) are executed. That is, the difference between the installation height S set on the height setting device (31) and the measurement distance of the distance meter (13) is read into the height memory (J), and thereafter, the step of the above-mentioned reference numeral (82) is performed. Then, it is determined whether or not the timer (T) reset to "0" has counted one hour. When the timer (T) has already counted the above time, that is, when the distance meter (13) continuously detects a position higher than the floor surface (14), a failure occurs in the distance meter (13) or the like. It is determined that there is, and the step of drawing code (95) is executed. This notifies that there is a failure in the distance meter (13) or the like. . On the other hand, if the measurement time of the timer (T) is less than one hour (when the timer (T) has not timed out) when the step of the above-mentioned reference numeral (833) is executed, the height memory ( The contents of J) are compared with the contents of the protrusion height memory Y1. That is, the distance (stored in the height memory (J)) between the measurement target point detected by the distance meter (13) and the floor surface (14) is compared with the contents of the convex portion height memory Y1. is there.
As shown by the imaginary line in FIG. 5, when the moving object (M) starts to pass and the distance meter (13) detects the height along the uneven curve (W) in FIG. 46) output (distance meter
(Distance between (13) and the measurement target point) continues to decrease. Then
In this state, the contents of the height memory (J) (the distance between the measurement target point measured by the distance meter (13) and the floor surface (14)) become larger than the contents of the convex portion height memory Y1. Is the drawing code (8
As shown in step 5), the value of the height memory (J) is written to the convex height memory Y1. . Subsequently, by executing the step of drawing code (86) and confirming whether the content of the height memory (J) is “0”,
It is determined whether the moving person (M) has passed or not, and the above-mentioned reference numerals (83) and (83) are used until the contents of the height memory (J) become "0".
3) Repeat steps (84) to (86). When this step is repeated and this is completed, the height of the moving person (M) is stored in the convex part height memory Y1. Also, the height memory (J) value is "0" after the mover (M) has passed.
Then, the steps of drawing symbols (86) to (89) are executed to determine whether or not the height of the moving person (M) stored in the protrusion height memory Y1 is larger than the separately determined height K to be detected. to decide. Next, if the height of the moving person (M) is larger than the height K to be detected by executing the step of drawing code (90), the value of the number of moving persons N is increased by "1" and displayed. Display on the container (4).

In the above embodiment, the timer (T) is reset when the output of the distance meter (13) is equal to the installation height S. However, the current time is measured by the timer (T). You may do so. In this case, both values (range meter (1
When the output of 3) is equal to the installation height S), the time at that time is stored again in a specific memory each time, and when the two values become inconsistent, the stored time and the subsequent timer ( T) Calculate the difference between the outputs (which output the current time). Then, the duration of the output of the distance meter (13) and the installation height S in a mismatch state are determined.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of the invention of claim 2;

FIG. 2 is an explanatory view of an embodiment showing an installation state of a distance meter (13).

FIG. 3 is a diagram illustrating the principle of measuring the distance between the distance meter (13) and the mobile (M).

FIG. 4 is a flowchart of a control program incorporated in the microcomputer of the control circuit (3) below.

[Fig. 5] A range finder (1) output with the passage of the mobile (M)
3) Detection signal

FIG. 6 is an explanatory diagram of prior art.

[Explanation of symbols]

 (1) ・ ・ ・ Passage (13) ・ ・ ・ Distance meter (31) ・ ・ ・ Height setter (32) ・ ・ ・ Comparator (33) ・ ・ ・ Alarm (34) ・ ・ ・ Disagreement signal generation Circuit (36) ・ ・ ・ Time comparator (37) ・ ・ ・ AND circuit (M) ・ ・ ・ Transfer (T) ・ ・ ・ Timer

Claims (2)

(57) [Claims] 1. A range finder (13) for receiving reflected light of light radiated from above onto a moving person (M) passing through a monitoring space and measuring a distance R to the moving person (M); A height setting device (31) for storing the installation height S on which the total (13) is installed is provided, and the installation height S and the distance meter (13) stored in the height setting device (31) are provided.
The height of the mobile (M) calculated by calculating the difference between the distance (R) and the height (D) of the mobile (M) is determined to be within a predetermined range. In the detection device, a comparator (32) that compares a measurement distance of the distance meter (13) at the time of power-on and an output of the height setting device (31) and outputs a failure signal when the two do not coincide with each other; A mobile detection device provided with an alarm (33) that operates on a failure signal output from (32). 2. A range finder (13) for receiving reflected light of light radiated from above the passageway (1) to a moving person (M) passing therethrough and measuring a distance R to the moving person (M). And a height setting device (31) for storing an installation height S on which the distance meter (13) is installed, and the installation height S stored in the height setting device (31) and the distance meter (31). 13) The height D obtained by calculating the difference between the distance R to the mobile (M) and the height D is determined to be within a predetermined range.
(M), the height setting device (3
The installation height S of the distance meter (13) stored in 1) and the distance meter (13)
A mismatch signal generation circuit (34) that compares the measured distances and outputs a mismatch signal when the two are in a mismatch state, and when the duration of the mismatch signal is measured and becomes longer than a predetermined time limit, Timer (T) that issues a time-up signal
And a notifying device (33) that operates when the time-up signal is applied.