JPH0666952A - Equipment for detecting moving person - Google Patents

Abstract

PURPOSE:To know a state of failure quickly and to enable execution of a rapid and appropriate process by comparing the measured distance by a distance meter with the output of a height setting unit when a power source is closed and by delivering a failure signal when the distance and the output do not coincide with each other. CONSTITUTION:A distance meter 13 is disposed at a ceiling part of a doorway A of an electric railroad car or the like, and the output of the distance meter 1 is impressed on a control circuit 3. The control circuit 3 is connected with a height setting unit 31 for setting manually a setting height of the distance meter, i.e., the distance between the ceiling part and a floor surface 14, and alarm 33 for communicating occurrence of a failure and a display unit 4. When the distance meter 13 fails, it occurs that the distance meter 13 outputs an abnormal value or that a signal therefrom vanishes, and the output of the distance meter 13 and the value set in the height setting unit 31 does not coincide with each other. Consequently, a noncoincidence signal is outputted in continuity from a noncoincidence signal generating circuit in the same way as in the case when a moving person M passes through. When the time of this continuity exceeds a limit time set beforehand, the alarm 33 operated and reports occurrence of the failure.

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 device of a type which measures the height of a person who passes through an entrance / exit of a passage and outputs a detection signal when the height is higher than a predetermined reference value. When a failure occurs in the device, this can be promptly notified, so that a quick and appropriate countermeasure can be taken.

[0002]

2. Description of the Related Art An invention of Japanese Patent Application No. 3-114194 has been proposed as an invention capable of separating and counting individual migrants from a migrant group that passes through entrances and exits of buildings and the like in a dense state. Of course, even when the moving person moves alone at the entrance / exit, this can be detected.

As shown in FIG. 6, in the ceiling portion (11) of the entrance / exit of the passage (1), a distance meter (13) for measuring the distance to the target point by receiving the reflected light of the light irradiated to the space below it. ) Is provided, and the output of the range finder (13) is applied to a control circuit (3) incorporating a microcomputer (hereinafter referred to as a microcomputer). The level setting device (39) and the display device (4) are connected to the control circuit (3).

Next, the movement detecting operation of the above prior art will be described. 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 mover (M) passes through the entrance (A) of the passage (1), the distance between the head of the mover (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 range finder (13) stored in advance in the microcomputer of the control circuit (3) is calculated, and the height D is calculated. When D is larger than the minimum height set by the level setting device (39), the count value of the mover (M) is increased and the count value is displayed on the display device (4). In addition, the functional unit of the microcomputer or a functional unit (for example, a dip switch type setting device) that stores the distance from the range finder (13) to the floor is referred to as a "height setting device (31)". Say.

However, in the above prior art,
Even if the range finder (13) or the electronic circuit that processes its output fails, it is not possible to quickly find the occurrence of the failure,
There has been a problem that the number of migrants (M) is left uncountable for a long period of time, and quick and appropriate treatment cannot be performed when the failure occurs. That is, the indicator (4) is a rangefinder (1
When the indicator (4) is lit when the detector is operated, it is often installed in a control room, etc., away from the entrance (A) where 3) etc. are installed. Apparently mistakenly thinks that the entire device is in a normal operating state. Therefore, even if the range finder (13) or the like is out of order, it cannot be found immediately, and the above-mentioned quick treatment becomes impossible. [Invention of Claim 1] The invention of Claim 1 is made in view of the above-mentioned point.
The person receiving the reflected light of the light emitted from above
(M) A distance meter (13) for measuring a distance R, and the distance meter (13)
A height setting device (31) for memorizing the installation height S installed is provided, and the moving person (M) is determined from the installation height S and the distance meter (13) stored in the height setting device (31). A moving person detecting device for detecting the moving person (M) by determining whether or not the height D of the moving person (M) calculated by calculating the difference from the distance R to If a part such as the range finder (13) is out of order when it is operated, it should be possible to promptly notify this, and the problem is to be able to take prompt and appropriate measures. To do.

[0006]

[Means for Solving the Problems] The technical means of the invention of claim 1 for solving the above-mentioned problem is that "the distance measured by the range finder (13) at power-on is compared with the output of the height setting device (31) The comparator (32) which outputs a failure signal when they do not match and the alarm (33) which operates by the failure signal output from the comparator (32) are provided ”.

[0007]

The above technical means operates as follows. Migrant
If the detector is powered on and started to operate before the monitoring of (M) is started, the range finder (13) starts measuring the distance between it and the floor surface of the space below it. Then, the measured distance to the floor surface 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,
When the distance meter (13) or the like is broken and this does not measure the distance to the floor surface, that is, the installation height S of the distance meter (13) stored in the height setter (31) and the distance If the actual outputs of the total (13) do not match, the comparator (32) outputs a failure signal. Further, even when the range finder (13) does not output any signal, the values of the two inputs of the comparator (32) do not match, and in this case also,
A failure signal is output from the comparator (32). Then, the alarm signal (33) is activated by the failure signal, thereby notifying the administrator of the apparatus that the detection apparatus has a failure.

[0008]

The invention of claim 1 has the following unique effect. When a part such as the range finder (13) fails, the alarm state of the alarm device (33) can be used to promptly know the failure state, so that a prompt and appropriate action can be taken at the time of the failure. [Invention of Claim 2] The invention of Claim 2 is a moving person.
If a component such as the range finder (13) fails during the monitoring of (M), its problem is to be notified.

[0009]

The technical means of the invention of claim 2 for solving the above problems will be described with reference to the conceptual diagram of FIG.
The technical means of the invention of "is a distance for measuring the distance R between the moving person (M) by receiving the reflected light of the light irradiated to the moving person (M) passing from above the passage (1) to below it. Meter (13) and the distance meter
Height setting device (31) that stores the installation height S at which (13) is installed
And the installation height S stored in the height setting device (31).
A moving person that detects the moving person (M) by determining whether or not the height D obtained by calculating the difference between the distance meter (13) and the distance R from the moving person (M) is within a predetermined range. In the detection device, the installation height S of the range finder (13) stored in the height setter (31) is compared with the measured distance of the range finder (13), and a mismatch signal is generated when the two are in a mismatched state. Disagreement signal generation circuit to output (34)
A timer (T) for measuring the duration of the disagreement signal and outputting a time-up signal when it exceeds a predetermined time limit, and an alarm device (33) which operates when the time-up signal is applied. ) Is provided ”.

[0010]

[Operation / Effect] The above technical means operates as follows.
When the distance meter (13) is measuring the distance to the floor of the aisle (1), the measured distance and the value stored in the height setter (31) (distance meter
Since the installation heights S of (13) are the same, the mismatch signal generation circuit (34) does not output the mismatch signal.

Next, in the space below the rangefinder (13), the person moving (M)
When the vehicle passes, the range finder (13) measures the distance to the moving person (M). Then, the installation height S of the range finder (13) stored in the height setter (31) and the measured distance of the range finder (13) do not match, which causes 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, rangefinder (13)
When the person starts to measure the distance to the part other than the floor of the passage (1), the timer (T) starts to measure the elapsed time after that.

Then, when the migrant (M) finishes passing through the space below the range finder (13) and the range finder (13) starts to measure the distance to the floor again, the measured distance is set to the height. (31) and the mismatch signal generation circuit (34) does not output the mismatch signal, the timer (T)
No longer measures and the whole returns to the initial state. next,
Describe the case where the distance meter (13) etc. fails.

When the rangefinder (13) or the like fails, the rangefinder (13)
Outputs an abnormal value or the signal from the rangefinder (13) disappears, and the output of the rangefinder (13) and the height setter (3
The value set in 1) (installation height S of the distance meter (13)) does not match. Then, the disagreement signal generation circuit (34) continuously outputs the disagreement signal as in the case where the moving person (M) has passed, and the timer (T) starts measuring the duration.
Then, the output of the distance meter (13) and the value set in the height setter (31) do not match, the above state continues, and when the duration exceeds a predetermined time limit, the timer (T) Send a time-up signal. That is, the timer (T) outputs a time-up signal when a predetermined time limit elapses after the distance meter (13) or the like has failed. Then, the alarm (33) operates by the time-up signal to notify the occurrence of the failure. Therefore, it is possible to perform a quick and appropriate process based on the notification.

[0014]

EXAMPLES Next, examples of the invention of the present application will be described.
As shown in FIG. 2, in this embodiment, the present invention is applied to the entrance / exit of a train. Doorway (A) (A) Ceiling
Distance meters (13) and (13) are arranged at (11) and (11), and outputs of the distance meters (13) and (13) are applied to the control circuit (3). Further, in the control circuit (3), a height setting device (31) for manually setting the installation height of the range finder (13), that is, the distance between the ceiling part (11) and the floor surface (14), and a failure An alarm (33) that informs the crew cabin of the occurrence and a display (4) are connected.

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

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

Since L: B = f: X ... [1], L = (fB) / X ... [2] On the other hand, assuming that the currents drawn 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] is satisfied, so from the equations [2] and [3], L = (I1 + I2) .f.B / ((I2-I1) .A)・ ・ ・ [4]

Therefore, by substituting the measured I1 and I2 into the above equation [4], the light irradiation point (measurement target point) of the light emitted from the light emitting diode (41) to the moving person (M) and the distance meter (13). The distance L between them is obtained. Also, an arithmetic circuit showing the above distance L
Output of (46) and range finder (13) set in height setter (31)
Installation height S (set to 2 m in this embodiment)
And the difference (height from the floor surface (14) to the point to be measured) is calculated by the microcomputer of the control circuit (3). Also, the control circuit (3)
A processing program having the contents shown in the flowchart of FIG. 4 is written in the microcomputer constituting the above, and the contents of the program will be described with reference to the flowchart of FIG.
In this embodiment, not only the passage of the moving person (M) is detected, but also the number of moving persons (M) can be counted and displayed by using the detection signal. ． First, when a power switch (not shown) is turned on, the step of drawing symbol (80) is executed to judge the output of the distance meter (13), and the distance measured by the distance meter (13) is the height setter (31). It is confirmed whether or not it is equal to the installation height S of the range finder (13) set to. Then, when these two values are not equal, it is determined that there is a failure of the range finder (13) and its attached electronic components, and the steps of the reference numeral (95) are executed, and the alarm (33) is operated to Notify the crew cabin (not shown) of the failure. As a result, a prompt and appropriate response to the failure can be achieved. In this embodiment, the functional unit in the microcomputer that compares the measured distance of the rangefinder (13) with the output of the height setter (31) corresponds to the comparator (32) according to claim 1. There is. ． On the other hand, as a result of performing the above steps, if it can be confirmed that the range finder (13) etc. does not have a failure when the power is turned on,
Initialization work is performed by executing the steps indicated by reference numerals (81) and (82). That is, the number N of moving persons is set to "0", and the convex portion height memory Y1 for storing the height of the head of the moving person (M) to be detected and the timer (T) are set to "0" respectively. set. ． Next, the distance to be measured by the distance meter (13) is determined in the same manner as in the above step (see the step of drawing code (821)), and this is set by the height setting device (31). When it is equal to the height S, that is, when it is determined that the mover (M) has not entered or exited the entrance (A), the step of drawing code (82) is executed again, and 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) does not match, the process following "" described below is executed. Further, in this embodiment, the functional unit in the microcomputer for executing the step indicated by the reference numeral (821) corresponds to the disagreement signal generating circuit (34) described in the technical means of claim 2. . ． When the above steps were performed, the rangefinder (13)
When the distance to a position higher than 4) is being measured, it is determined that a mover (M) has occurred, and the steps indicated by reference numerals (83) (833) are executed. That is, the difference between the installation height S set in the height setter (31) and the measured distance of the rangefinder (13) is read into the height memory (J), and then the step of the above-mentioned drawing code (82) is read. Then, it is judged whether or not the timer (T) which has been reset to "0" has counted one hour. Then, when the timer (T) has already counted the above time, that is, when the range finder (13) continuously detects a position higher than the floor surface (14), the range finder (13) is out of order. It is determined that there is, and the step of drawing code (95) is executed. As a result, the fact that the distance meter (13) or the like has failed is notified. ． On the other hand, if the time measured by the timer (T) is less than 1 hour when the step of the above-mentioned drawing code (833) is executed (when the timer (T) has not timed up), the height memory ( The contents of J) and the contents of the convex height memory Y1 are compared. That is, the distance between the measurement target point detected by the distance meter (13) and the floor surface (14) (stored in the height memory (J)) is compared with the contents of the convex height memory Y1. is there.
Then, as shown by the imaginary line in FIG. 5, when the moving person (M) begins to pass and the range finder (13) detects the height along the uneven curve (W) in the figure, the arithmetic circuit ( 46) output (distance meter
The distance between (13) and the measurement point) continues to decrease. Then,
In this state, the contents of the height memory (J) (the distance between the measurement point measured by the distance meter (13) and the floor surface (14)) becomes larger than the contents of the convex height memory Y1. Is the drawing code (8
As shown in step 5), the value of the height memory (J) is written in the convex portion height memory Y1. ． Then, by executing the step of drawing code (86) and checking whether the content of the height memory (J) is "0",
It is judged whether or not the moving person (M) has finished passing, and the above-mentioned drawing symbols (83) (83) are displayed until the contents of the height memory (J) become "0".
3) Repeat steps (84) to (86). When the steps are repeated and completed, the height of the moving person (M) is stored in the convex height memory Y1. Also, the value of the height memory (J) is "0" after the moving person (M) has finished passing.
Then, it is determined whether or not the height of the moving person (M) stored in the convex portion height memory Y1 is larger than the detection target height K which is separately determined by executing the steps (86) to (89). to decide. Next, if the height of the moving person (M) is larger than the detection target height K by executing the step of drawing code (90), the value of the number N of moving persons 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 range finder (13) is equal to the installation height S, but the timer (T) measures the current time. You may do it. In this case, both of the above values (distance 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 above two values become inconsistent, the above stored time and the subsequent timer ( T) Calculate the output difference (current time is output). Then, the duration of time when the output of the range finder (13) and the installation height S thereof do not match is determined.

[Brief description of drawings]

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

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

[Figure 3] Principle explanatory diagram for measuring the distance between the distance meter (13) and the moving person (M)

[Fig. 4] Flow chart of the control program embedded in the microcomputer of the control circuit (3) below.

[Fig. 5] A range finder (1 that is output as a moving person (M) passes
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)

[Claims] 1. A range finder (13) for measuring a distance R between a moving person (M) passing through a surveillance space and receiving reflected light of light emitted from above the moving person (M), and the distance. A height setting device (31) for storing the installation height S at which the meter (13) is installed is provided, and the installation height S and the distance meter (13) stored in the height setting device (31) are stored.
A person who detects the moving person (M) by determining whether or not the height D of the moving person (M) calculated by calculating the difference from the distance R from the moving person (M) to the moving person (M) is within a predetermined range. In the detection device, a comparator (32) that compares the measured distance of the distance meter (13) when the power is turned on and the output of the height setter (31) and outputs a failure signal when the two do not match, and the comparator. A moving person detection device provided with an alarm device (33) which operates in response to a failure signal output from (32). 2. A range finder (13) for measuring a distance R to a moving person (M) by receiving reflected light of a light emitted to the moving person (M) passing from above the passage (1) to below the passage (1). And a height setting device (31) for storing the installation height S at which the range finder (13) is installed, and the installation height S and the range finder (31) stored in the height setter (31) are provided. 13) to the moving person (M) The difference between the distance R and the height D calculated by calculating the difference is judged whether or not the moving person moves
In the moving person detection device that detects (M), the height setting device (3
Installation height S of the distance meter (13) stored in 1) and the distance meter (13)
A mismatch signal generation circuit (34) that outputs a mismatch signal when the two are in a mismatch state by comparing the measurement distances of the two, and when the duration of the mismatch signal is measured and this exceeds a predetermined time limit, Timer (T) that outputs a time-up signal
And a moving person detecting device provided with an alarm device (33) which is activated when the time-up signal is applied.