KR20200068820A - People counter for improving accuracy - Google Patents

Abstract

The present invention relates to a human body detecting device with increased accuracy which analyzes a detection signal output by each depth sensor to determine whether the moving direction of a human body is ′confirmed entrance′ and ′exit′ or ′unconfirmed entrance and exit′ and classifies a status as ′ZERO′ step, ′CHECK′ step, ′WAIT′ step, ′AOL′ step, and ′IOL′ step based on a determination result so that the human body detecting device detects various unexpected actions that humans can perform in the detection area of the depth sensors, thereby having accuracy of calculating the number of people inside rooms and an excellent correction rate.

Description

People counter for improving accuracy

The present invention relates to a people counter with increased accuracy, and in detail, a plurality of depth sensors are used to accurately count the number of occupants located in the sensing area and accurately turn lights on and off according to the number of occupants. It's about the raised people counter.

The human body sensor is a sensor that determines the presence or absence of a human body within a predetermined area, and an infrared sensor that detects the presence or absence of a human body by detecting infrared rays generated by the human body and a radar sensor that uses reflection of microwaves are mainly used. At this time, the infrared sensor determines the presence or absence of the human body by using the fine infrared rays emitted from the body by using a human body having a body temperature of approximately 36 to 37° C. to emit far infrared rays having a peak of approximately 9 to 10 μm. The sensor detects the movement of the object by comparing the transmitted and reflected waveforms of microwaves in the approximately 2.4 to 24 GHz band.

In addition, with the advent of the automation age, a human body detecting device that automatically performs a specific function according to the result of the detection or presence of a human body is used in various aspects such as human body detection lighting, air purifiers, and intrusion alarm security devices. Accordingly, the unmanned human body detecting device performing a specific function is being used more and more due to convenience, manpower, and advantages of reducing power consumption.

1 is an exemplary view for explaining a problem of a conventional human body sensing device.

As shown in FIG. 1, the conventional human body detection device 100 is installed on a door and calculates the occupancy level using a sensor 101 that performs one-dimensional sensing and a detection signal sensed from the sensor 101. It consists of a control unit (not shown).

In addition, the conventional human body detecting device 100 is usually installed in the door 104 to correspond to the position of the waist portion of the human body, and is mainly used for the door 104 such as the toilet and office due to low manufacturing cost.

However, in the conventional human body sensing device 100, since the sensor 101 is capable of only one-dimensional sensing, as shown in (a) of FIG. 1, the pedestrian 105 changes the path from the sensing section of the sensor 101. In this case, an error occurs that does not accurately recognize this.

In addition, the conventional human body sensing device 100 is capable of fluid response to sudden movements of the human body when the pedestrian 105 moves irregularly in the sensing section of the sensor 101, as shown in FIG. 1(b). The problem is that the accuracy of calculating occupancy is poor.

In addition, the conventional human body detecting device 100, as shown in (c) of Figure 1 (105) as well as the passer (105) when entering and exiting the door 104 with a large luggage (107) carrying a large luggage (107) Even (107) is judged by the human body to calculate the degree of occupancy.

As described above, the conventional human body detection device 100 does not flexibly respond to various unexpected actions that the human body can perform, and thus the reliability of the output value of the occupancy is very low, and the detection rate of such inaccurate occupancy is waiting inside. If is present, the lighting lamp suddenly goes out and can instantly cause a threat to the human body.

In addition, the conventional human body detecting device 100 increases the power consumption by continuously lighting the lighting lamp because it is difficult to accurately determine the occupancy level when there is no waiting inside because the occupancy level detection rate is low. Causing adverse effects.

The present invention is to solve such a problem, and the problem of the present invention is to analyze each detection signal detected by a plurality of depth sensors that sense a predetermined area two-dimensionally in a plurality of analysis modules having different algorithms. It analyzes and determines the direction of movement of the human body, and determines the direction of movement of the human body according to the determined movement direction as determined and exited or undecided admission and exit, and determines the current occupancy status according to the determined movement direction as'ZERO','CHECK' It is classified as'step,''WAIT','AOL', and'IOL' to calculate the number of occupants, so it accurately detects the entrance and exit of the human body for various unexpected actions performed by the human body and turns on and off the lighting. It is intended to provide a people counter with an increase in.

The solution of the present invention for solving the above problems is in a people counter for detecting a human body existing in a preset detection area: the people counter is a depth sensor for detecting an object as a human body moving inward from the doorway of the detection area field; By analyzing the detection signals detected by the depth sensors, it is determined whether the moving direction of the object is the entrance or exit, and if the movement directions determined during the predetermined period are all the same, the final moving direction is confirmed entrance or final exit. A moving direction determining module for determining; And a count and correction module that increases the number of occupants when the final movement direction is confirmed by the movement direction determination module and decreases the number of occupants by 1 when the final movement direction is confirmed exit, and determines the movement direction The module outputs an'unspecified entry' signal when the determined movement direction does not coincide during the period, but the determined movement direction has many'entrances', and outputs an'unspecified exit' signal when the number of'exit' directions is large. Then, the count and correction module calculates the'unconfirmed number of unemployed persons' by subtracting 1 from the number of unoccupied persons when receiving the'indeterminate admission' signal, and subtracting 1 from the number of unaccompanied persons when receiving the'unspecified exit' signal. In the meantime, while the detection signal is not generated, the'number of unconfirmed unemployed persons' is decreased by 1 for each predetermined IDLE time to correct and calculate the number of unconfirmed unemployed persons. It is to decrease the number of unconfirmed unemployed persons by 1 according to the signals of undecided leave and to increase the number of unconfirmed unemployed persons by 1 according to the signals of'determinate positions' and'undetermined positions'.

In addition, in the present invention, the people counter further includes a power supply and cutoff unit for supplying or shutting off power to the indoor space, and the count and correction module is configured to cut off the power supply and cutoff signal when the occupancy is zero. Further comprising a power supply and a blocking unit for supplying or blocking power to the indoor space, and the counting and correction module generates the detection signal for a predetermined weight time after the'indeterminate number of unattended occupants' becomes zero. If not, it is preferable to cut off the power by sending a control signal to the power supply and cut-off unit.

According to the present invention having the above problems and solutions, the people counter includes a plurality of analysis modules in which the movement direction determination module is composed of different algorithms, and the plurality of analysis modules are configured to receive detection signals detected by depth sensors using different algorithms. The direction of movement is determined by determining the direction of movement as'determinate position','determinate exit','undetermined position', and'undetermined exit' depending on whether the movement directions determined by the analysis modules are identical or inconsistent. Make accurate calculations.

In addition, the count and correction module of the people counter displays the current occupancy status according to the movement direction data received from the movement direction determination module in the'ZERO' stage, the'CHECK' stage, the'WAIT' stage, the'AOL' stage, and the'IOL' stage. By classifying them into stages, the number of occupants calculated by'confirmed position and exit' and'unconfirmed position and exit' is calculated differently.

In addition, the count and correction module deducts 1 from the current number of occupants if no motion is detected by the depth sensor until the preset IDLE time elapses if the occupancy level is 0 when the current occupancy status is'unspecified entry and exit'. When this operation is repeated and the current number of unconfirmed unemployed persons becomes 0, the state may be shifted to the'WAIT' step to correct errors that may occur due to'unspecified entry and exit'.

In addition, the count and correction module measures the elapsed time in the'WAIT' phase, and if no movement is detected by the depth sensor until the elapsed time reaches the preset WAIT time, it is determined as the lighting is turned off, resulting in'unspecified entry and exit' Correct any possible errors.

1 is an exemplary view for explaining a problem of a conventional human body sensing device.
2 is a block diagram showing a people counter according to an embodiment of the present invention.
3 is an exemplary view showing detection areas of depth sensors of a people counter, which is an embodiment of the present invention.
FIG. 4 is a block diagram showing the movement direction determination module of FIG. 2.
5 is a relationship diagram showing the count and correction module of FIG. 2.
6 is a flowchart showing an operation process of the people counter according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

2 is a block diagram showing a people counter according to an embodiment of the present invention.

The control unit 3 of the people counter 1 of FIG. 2 includes a control module 31, a memory 32, a signal conversion module 33, a movement direction determination module 35, a count and correction module 37, and a timer The first depth sensor 5 and the first depth sensor 5 detect the movement of the human body in the area adjacent to the door (not shown), including (39), the entrance and exit of the human body. The second depth sensor 7 for detecting the inside of the area, the third depth sensor 9 for detecting the inside of the detection area sensed by the second depth sensor 7, and the lighting lamp 13 by supplying or blocking power ) To connect the power supply and cut-off parts 11 for controlling the lighting and the light-off, these control objects (5), (7), (9), (11) are controlled by the control module (31).

In this case, the first depth sensor 5, the second depth sensor 7, and the third depth sensors 9 may be composed of sensors of various configurations capable of detecting the entrance and exit of the human body in a predetermined area, and the human body It is preferable that it consists of an infrared sensor that detects the presence or absence of the human body by sensing the infrared rays generated from the.

3 is an exemplary view showing detection areas of depth sensors of a people counter, which is an embodiment of the present invention.

As illustrated in FIG. 3, the first depth sensor 5, the second depth sensor 7, and the third depth sensor 9 of the people counter 1, which is an embodiment of the present invention, are indoor spaces from the door 6. It detects the entrance and exit of the human body within an area that is sequentially set inward. At this time, the first depth sensor 5 detects the movement of the human body in the first detection area 15 formed in the area adjacent to the entrance door 6, and the second depth sensor 7 has the first detection area 15 The movement of the human body is sensed in the second sensing region 17 that is continuously formed inside of the third depth sensor 9, and the third sensing region 19 that is continuously formed inside the second sensing region 17 is detected. ) Is configured to detect the movement of the human body.

In addition, the first depth sensor 5, the second depth sensor 7, and the third depth sensor 9 are detected when sensing the entrance and exit of the human body in the corresponding detection areas 15, 17, 19 The data is output and transmitted to the control unit 3.

In addition, in FIG. 3, the first depth sensor 5, the second depth sensor 7, and the third depth sensor 9 enter the human body in the sensing regions 15, 17, and 19, respectively. As an example, the first depth sensor 5, the second depth sensor 7, and the third depth sensor 9 are configured as an infrared sensor capable of detecting exit, but the movement of the human body within a preset sensing area It can be applied in a variety of configurations and methods that can detect.

In addition, in FIG. 3, the depth sensors 5, 7, and 9 have been described as three, but the number of depth sensors is not limited to this, but at least three are required to accurately determine the movement state of the human body. It is preferably composed of.

In addition, the first depth sensor 5, the second depth sensor 7, and the third depth sensor 9 detects the infrared rays generated by the human body of each of the detection areas 15, 17, 19 The detection data is transmitted to the control unit 3.

The power supply and blocking unit 11 includes a lighting lamp 13 that emits light in a predetermined area, and when a power cut control signal is transmitted from the control unit 3, the power supplied to the lighting lamp 13 is cut off to turn on the lighting lamp ( In 13), make sure that no light is emitted.

The control module 31 of the control unit 3 is an operating system (OS) of the control unit 3, and controls each of the configuration modules 32, 33, 35, 37, and 39.

Further, the control module 31 transmits the sensed signals to the signal conversion module 33 when the sensed signals are received from the first, second, and third depth sensors 5, 7, and 9, respectively. .

In addition, when the count and correction module 37 determines that the current occupancy is '0', the control module 31 transmits a power supply and power off control signal to the power supply and shutoff unit 11 to turn on the lighting lamp 13 And lights out.

The memory 32 is a preset detection area 15, 17, 19 detected by the depth sensors 5, 7 and 9, and the current received from the count and correction module 37. Store the number of occupants.

The signal conversion module 33 amplifies the weak detection signal transmitted from each of the first depth sensor 5, the second depth sensor 7, and the third depth sensors 9 under the control of the control module 31. And convert it into a recognizable signal.

That is, the signal conversion module 33 is composed of a commonly used electric circuit, and in detail, an amplifier (not shown) that amplifies the weak detection signal transmitted from each of the depth sensors 5, 7 and 9 ), and a filter (not shown) that removes noise of a signal output through an amplifier (not shown), wherein the converted data (signal) is a moving direction determining module under the control of the control module 31 ( 35).

FIG. 4 is a block diagram showing the movement direction determination module of FIG. 2.

The movement direction determination module 35 of FIG. 4 analyzes signals received from the signal conversion module 33, that is, detection signals output from the depth sensors 5, 7 and 9, respectively, Determine the entrance and exit directions.

In addition, the movement direction determination module 35 includes a plurality of analysis modules (51-1), (51-2), ..., (51-(N-1)), (51-N), each of The analysis modules 51-1, ..., (51-N) analyze the detection signals output from the depth sensors 5, 7, and 9 to determine the entrance and exit directions of the human body. However, since it is configured to analyze the detection signal in different ways, when one signal is input, each of the analysis modules 51-1, ..., (51-N) analyzes the signal according to the algorithm configured in each of the human body. Determine the direction of entry and exit. At this time, since the method of detecting the moving direction of the human body using the detection data is a technique commonly used in the people counter, the detailed description will be omitted, and the analysis modules 51-1, ..., (51-N) By determining the position and exit direction of the human body using different algorithms, it is possible to analyze various unexpected actions that can be performed by humans within the detection areas 15, 17, and 19.

In addition, the movement direction determination module 35 is a respective analysis module (51-1) for outputting the movement direction data of the human body in each area by the signal input by the signals received from the signal conversion module 33, ..., (51-N), and each of the analysis modules (51-1), ..., (51-N) determines the movement direction according to the movement direction data of the human body.

In addition, the movement direction determination module 35 receives the detection signal from the signal conversion module 33, each of the analysis modules (51-1), ..., (51-N) of the human body according to the algorithm configured in each In this case, when each of the analysis modules 51-1, ..., (51-N) judges the direction of movement of the human body as'the position of the human body', the movement direction determination module 35 is' Determining position', and when each of the analysis modules 51-1, ..., (51-N) determines that the moving direction of the human body is'out of the human body', the moving direction determination module 35 Is judged as'determinate exit'.

In addition, the movement direction determination module 35, the movement direction of the human body toward the predominant determination result when the movement direction data of the human body determined by the respective analysis modules 51-1, ..., (51-N) do not match The decision is made, but it is judged as'unconfirmed position' or'unconfirmed exit'. For example, the analysis modules (51-1), (51-3) determine the direction of movement of the human body as the exit, and other analysis modules (51-2), (51-4), ..., (51 In the case of -N), when the movement direction of the human body is judged as the position, the movement direction determination module 35 does not match the movement direction determined by the respective analysis modules 51-1, ..., (51-N). It is judged as'unconfirmed position' because a plurality of analysis modules 51-2, (51-4), ..., (51-N) have judged the'entrance' of the human body.

In addition, the movement direction determination module 35 transmits the detected movement direction data to the count and correction module 37 under the control of the control module 31.

5 is a relationship diagram showing the count and correction module of FIG. 2.

The count and correction module 37 counts the current number of occupants when the movement direction data is received from the movement direction determination module 35 and transmits the lights out data to the control module 31 when the current occupancy is '0'. When the number of occupants is calculated to be greater than '0', the lighting data is transmitted to the control module 31. At this time, the control module 31 transmits the received data to the power supply and shut-off unit 11 so that the lighting lamp 13 is turned on and off flexibly according to the presence or absence of occupants.

In addition, the count and correction module 37 uses the movement direction data received from the movement direction determination module 35, that is,'confirmed position','confirmed exit','unconfirmed admission' and'unconfirmed exit' data to determine the number of occupants. In addition to the calculation, it is possible to calculate the exact number of occupants without error for various unexpected actions that can be performed by humans within the detection areas 15, 17, and 19.

In addition, in the count and correction module 37,'confirmed admission' data is AOL+ (Accurate Occupation in),'confirmed exit' data is AOL-(Accurate Occupation out), and'unconfirmed admission' data is IOL+ for convenience of explanation. (Inaccurate Occupation in),'Undecided exit' data will be called IOL-(Inaccurate Occupation out), currently confirmed number of unoccupied occupants as AOL (Accurate Occupation Level), and currently undecided unemployed people will be named IOL (Inaccurate Occupation Level). do.

In addition, as shown in FIG. 5, the counting and correction module 37 classifies the number of definite occupants or undecided occupants by classifying the data in 5 steps according to the movement direction data received from the movement direction determination module 35, wherein the 5 The steps consist of the'ZERO' step 61, the'CHECK' step 63, the'WAIT' step 65, the'AOL' step 67, and the'IOL' step 69. That is, when the count and correction module 37 receives AOL+ or AOL- data from the movement direction determination module 35, it adds and subtracts '1' from AOL (determined number of confirmed occupants), and IOL+ from the movement direction determination module 35 Alternatively, upon receiving IOL-data, the number of unoccupied persons (A0L) is determined by adding and subtracting '1' from the IOL (unconfirmed number of unoccupied persons), depending on whether the movement direction determined by the movement direction determination module 35 is confirmed and exited or undecided and exited. And IOL).

The'ZERO' step 61 determines that the current occupancy number is '0' and outputs lights-out data, and corresponds to the case where the current occupied occupancy level (AOL) is '0'.

In addition, the'ZERO' step 61 is moved to the'CHECK' step 63 when the detection data is output from any one of the depth sensors 5, 7 and 9.

In addition, the count and correction module 37 moves to the'CHECK' step 63 and operates the timer 39 at the same time.

In the'CHECK' step 63, if no detection data is output from the depth sensors 5, 7, 9 until the elapsed time measured in the timer 39 becomes a preset CHECK time, the'ZERO' 'Go to step 61.

In addition, in the'CHECK' step 63, if the'AOL+' data or the'AOL-' data is transmitted from the movement direction determination module 35 before the elapsed time measured in the timer 39 reaches a preset CHECK time, the'AOL' Go to step 67, and if'IOL+' data or'IOL-' data is received from the movement direction determination module 35, the process moves to'IOL' step 69.

For example, when the human body enters the first detection area 15, the count and correction module 37 detects the movement of the sensor in the'ZERO' step 61 and transitions the state to the'CHECK' step 63 The elapsed time is measured, and if the human body enters the first sensing area 15 for a while and then goes outside the door 6, the count and correction module 37 transitions to the'CHECK' step 63 and then depths. The sensors (5), (7), and (9) do not detect any movement of the human body until the elapsed time reaches the CHECK time, so the state transitions back to the'ZERO' step (61). (6) When the detection data is output from the second depth sensor 7 or the third depth sensor 9 by moving inward, the state is shifted to the next step ('AOL' step 67 or'IOL' step 69). Transition makes it possible to accurately detect human sudden behavior.

The'AOL' step 67 is a movement in which the human body is detected in the detection areas 15, 17, and 19 and the detection signals output from the depth sensors 5, 7, 9 are transmitted. When the direction determination module 35 determines the direction of movement of the human body as'determinate position' or'determinate exit', it is a moving step, and when'AOL+' and'AOL-' data are transmitted from the movement direction determination module 35 AOL adds and subtracts '1'.

In addition, when'IOL+' and'IOL-' data are received from the movement direction determination module 35 in the'AOL' step 67, the'IOL' step 69 proceeds after adding and subtracting '1' from the AOL. , The value added or subtracted from '1' in AOL is replaced by the IOL value.

In addition, since the'AOL' step 67 is calculated according to the correct entry and exit when the AOL reaches 0, no other correction work is required, and the lighting lamp 13 is turned off by moving directly to the'ZERO' step 61. do.

In the'IOL' step 69, the human body is detected in the detection areas 15, 17 and 19, and the detection signal output from the depth sensors 5, 7 and 9 is transmitted. When the direction determining module 35 determines the direction of movement of the human body as unspecified entrance and exit, it is a moving step, and the timer 39 is operated at the same time as the movement to measure the elapsed time t.

Further, the count and correction module 37 measures the elapsed time t by operating the timer 39 when the occupancy state transitions to the'IOL' step 69, and the elapsed time t is a preset correction time (hereinafter If no detection signal is detected by the depth sensors (5), (7), (9) until IDLE time), IOL is subtracted from 1, and this operation is repeated for each correction time to return an IOL value of '0. When it becomes', the occupancy status transitions from the'IOL' step 69 to the'WAIT' step 65.

Also, in the'IOL' step 69, when'AOL+' or'IOL+' data is transmitted from the movement direction determination module 35, '1' is summed in the IOL, and'AOL-' from the movement direction determination module 35, When'IOL-' data is received, '1' is subtracted from the IOL, and when the IOL value becomes '0', the process moves to the'WAIT' step 65.

That is, in the'IOL' step 69, if the detection data is not output until the elapsed time becomes the IDLE time, 1 is subtracted from the IOL, and when the IOL value becomes '0' due to repetition of the subtraction, the status is'WAIT'. Since the transition to step 65, errors that may occur due to unconfirmed entry (IOL+) and exit (IOL-) are corrected in the'WAIT' step 65.

The'WAIT' step 65 is a step that is moved when the number of unoccupied unemployed persons (IOL) is currently '0', and corrects inaccurate data that may occur due to the undecided position (IOL+) and undecided exit (IOL-). It is a step.

In addition, the'WAIT' step 65 measures the elapsed time t by operating the timer 39, and the depth sensors 5, 7 and 9 until the measured elapsed time reaches a preset WAIT time. ), if no detection data is output, the process moves to'ZERO' step 61.

In addition, the'WAIT' step 65 moves to the'AOL' step 67 when the AOL+ or AOL- data is transmitted from the moving direction determination module 35 before the measured elapsed time becomes the WAIT time, and the'AOL' step (67) The subsequent process is to be performed again. At this time, it is preferable to significantly change the correction time since the number of undecided unemployed persons is not '0' when receiving the final exit (AOL-) or the final exit (IOL-) data in the'WAIT' step 65.

In addition, if IOL+ or IOL- data is received from the movement direction determination module 35 before the WAIT time in the'WAIT' step 65, the process moves to the'IOL' step 69, and after the'IOL' step 69 Let the process run again.

6 is a flowchart showing an operation process of the people counter according to an embodiment of the present invention.

When the human body enters and exits the preset sensing regions 15, 17, and 19, the depth sensors 5, 7, and 9 detect movement of the human body (S10). Depth sensors (5), (7), (9) transmits a detection signal to the control unit (3) (S20).

The signal conversion module 33 of the control unit 3 amplifies the sensed signals received from the depth sensors 5, 7 and 9, and converts them into recognizable signals. Remove noise. At this time, the amplified signal is transmitted to the movement direction determination module 35 (S30).

When the detection signal is transmitted from the signal conversion module 33, the movement direction determination module 35 analyzes the detection signal received from the analysis modules 51-1, ..., (51-N) composed of different algorithms. Then, it is determined whether the movement of the human body is left or left. At this time, the movement direction determination module 35 determines the movement direction of the human body as'confirmed position' and'if the movement directions of the human body determined by the respective analysis modules 51-1, ..., (51-N) match. Determined exit' is determined, and if the direction of movement of the human body is inconsistent, the direction of movement of the human body is determined as'unspecified position' and'unspecified exit' (S40).

The count and correction module 37 according to the movement direction data received from the movement direction determination module 35, the'ZERO' step (61),'CHECK' step (63),'WAIT' step (65),'AOL' Step 67,'IOL' to transition to step 69, and each of the steps 61, 63, 65, 67 and 69 are driven as described above, AOL and IOL values Calculate (S50).

The count and correction module 37 determines whether the current occupancy state is the AOL state 67 or the IOL state 69 (S60).

The count and correction module 37 determines whether the AOL value is O when the current occupancy state is the AOL state 67 (S70). If the count and correction module 37 has a non-zero AOL value, it sends a power supply control signal to the power supply and cutoff unit 11 under the control of the control module 31, and the power supply and cutoff unit 11 When the power supply control signal is received, power is supplied to the lighting lamp 13 so that the lighting lamp is turned on, and then the process after step 10 (S10) is performed again after returning to step 10 (S10) (S80). If the AOL value is 0, the count and correction module 37 sends a power cut control signal to the power supply and cutoff unit 11 so that the lighting lamp 13 is turned off (S90).

If the count and correction module 37 is the current state of the IOL state 69, it is determined whether the IOL value is 0. At this time, if the count and correction module 37 is not 0, the process returns to step 80 (S80) and the process after step 80 (S80) is performed again (S100).

If the IOL value is 0, the count and correction module 37 determines whether the elapsed time t at which the detection signal is not detected from the depth sensors 5, (7), (9) is greater than the WAIT time. . At this time, if the elapsed time t is less than the WAIT time, it is kept on (S80), and when the elapsed time t exceeds the WAIT time, the power is cut off to turn off (S90).

1: People counter 3: Control unit
5: 1st depth sensor 7: 2nd depth sensor
9: Third depth sensor 11: Power supply and cut-off part
13: Lighting lamp 31: Control module
32: memory 33: signal conversion module
35: Movement direction determination module 37: Count and correction module
39: Timer

Claims (2)

In the people counter that detects the human body existing in the preset sensing area:
The People Counter
Depth sensors for sensing an object as a human body moving inward from the entrance of the detection area;
By analyzing the detection signals detected by the depth sensors, it is determined whether the moving direction of the object is the entry or exit, and if all of the movement directions determined during the predetermined period are the same, the final moving direction is determined or exited. A moving direction determining module for determining;
The counting and correction module increases the number of occupants when the final movement direction is confirmed by the movement direction determination module by 1, and decreases the number of occupants by 1 when the final movement direction is confirmed exit,
The movement direction determination module
The movement direction determined during the period does not coincide, but when the determined movement direction has a large number of'entrances', an'unspecified entry' signal is output, and when the number of'exit' directions is large, an'unspecified exit' signal is output,
The count and correction module
When the'unspecified admission' signal is input, 1 is added to the number of unoccupied persons, and when the'undecided exit' signal is received, 1 is subtracted from the number of unoccupied personnel to calculate the'undecided number of unaccompanied persons', and then the detection signal is not generated. During the predetermined IDLE time, the number of unconfirmed unemployed persons is decreased by 1 for each predetermined IDLE time, and the number of unconfirmed unemployed persons is corrected and calculated. The people counter characterized in that the number of unoccupied persons is decreased by 1, and the number of undecided persons is increased by 1 according to the signals of'confirmed position'and'indeterminateposition'. In claim 1, The People Counter
Further comprising a power supply and cut-off unit for supplying or blocking power to the indoor space, the counting and correction module transmits a power cutoff signal to the power supply and cut-off unit when the occupancy number becomes 0, and the indoor space Further comprising a power supply and cut-off unit for supplying or shutting off the power, the count and correction module if the detection signal is not generated for a predetermined weight time after the'unconfirmed number of unoccupied personnel' becomes 0, the power supply and cut-off unit People counter, characterized in that to cut the power by sending a control signal.

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