JP5233055B2 - Moving object passage detection device - Google Patents

Description

  The present invention relates to a moving body passage detection device that is installed in a place where a moving body such as a pedestrian or a vehicle passes and detects a passing state of the moving body.

  When counting the number of visitors to the building or event venue, or counting passing vehicles on the road, the pedestrians are detected using an infrared sensor, and the images captured by the surveillance camera are analyzed and counted. It has been proposed to do. However, in the case of such optical detection and counting, if a moving body such as a pedestrian is overlapped in the detection direction, a detection error may occur. Further, in order to analyze the captured image and count the moving bodies, there is a problem that an analysis process of the image is necessary, and it takes a processing time and the development cost increases.

Therefore, it has been proposed to detect a change in pressure due to a load applied when the moving body passes and detect the passage of the moving body. For example, in Patent Document 1, a large number of pressure sensitive element groups arranged in a matrix are provided, and are installed so as to form a floor surface in each predetermined distance range in two directions, a direction in which a person passes and a direction perpendicular thereto. The pedestrian's footprint information is detected using a distributed pressure sensor, and the number of people who have passed through the floor is determined by identifying the footprint information indicating the same person and the footprint information that is not the same person from the footprint information that changes in time series. A counting device for counting people is described. Further, in Patent Document 2, a mat-like matrix sensor for detecting the position and shape of a person's shoe sole passing by pressure change is laid at a place where the number of passing persons is to be counted, and based on detection data from the matrix sensor. A passing person counting device is described that counts passing persons when it is determined that a shoe sole or the like having the same shape detected in this way proceeds in one direction and disappears completely outside the one direction. Further, in Patent Document 3, the bottom shape pattern of footwear that is stepped on is recognized from the distribution of the stepping pressure by the person on the passing surface in a certain area, and is stored in association with the attribute information of the person set in advance. Is compared with the stored data, and a number counter is described that outputs the number of people passing through the passage plane in association with the attribute information of the person who passed. Further, in Patent Document 4, each floor tile in a partial area of the floor A has a function capable of detecting the number of steps, and a display unit that displays a count amount in response to a detection signal from the floor tile is provided in the room. The point which is provided inside or outside the section is described.
JP-A-5-324955 JP-A-6-309536 Japanese Patent Laid-Open No. 9-231343 JP 2003-239510 A

  In Patent Documents 1 to 3 described above, the pedestrian's footprint is analyzed based on the detection pattern of the pressure sensor to detect the number of passing people, but complicated processing is performed to analyze the detection pattern. Since it is necessary and processing time is required to analyze various footprint patterns, a detection error may occur when a plurality of pedestrians pass in parallel.

  Moreover, in patent document 4, since a passing direction cannot be detected, there exists a problem that a passing / exiting person cannot be detected correctly.

  Therefore, an object of the present invention is to provide a moving body passage detection device that can detect a passing state of a moving body with a simple configuration.

A mobile body passage detection device according to the present invention is configured by dividing a pressure-sensitive sheet in which a number of pressure-sensitive sensors that detect pressure applied when passing through a mobile body are arranged, and the pressure sensor into three or more types of regions. An area detection unit that repeatedly sets an area and detects a pressure-sensitive state in each type of area via a common wiring, and an area detection pattern in which the detection timing of each area detected by the area detection unit is arranged in time series And a determination unit that determines a passing state of the moving body in comparison with a region detection pattern stored in advance . Furthermore, the pressure-sensitive sensor includes a fiber structure using conductive fibers. Further, the pressure-sensitive sheet includes a plurality of types of pressure-sensitive sensors having different sensitivities. Furthermore, a counting unit that counts the number of passages in each passing direction based on the determined passing state is provided.

  The present invention has the above-described configuration, so that the pressure-sensitive sensor of the pressure-sensitive sheet is divided into three or more regions, the pressure-sensitive state in each region is detected, and the moving body passes based on the region detection pattern. Since the state is determined, the passing state of the moving body can be detected accurately and quickly with a simple configuration.

  In other words, since the pressure-sensitive state of each area is detected rather than the pressure-sensitive state of each pressure sensor, the acquired detection data is reduced, the processing time is shortened, and the passing state is determined based on the area detection pattern. Therefore, it is possible to accurately determine the passing state such as the passing direction.

  Hereinafter, embodiments according to the present invention will be described in detail. The embodiments described below are preferable specific examples for carrying out the present invention, and thus various technical limitations are made. However, the present invention is particularly limited in the following description. Unless otherwise specified, the present invention is not limited to these forms.

  FIG. 1 is a schematic configuration diagram relating to an embodiment of the present invention. The moving body passage detection device includes a pressure-sensitive sheet 1 in which a large number of pressure-sensitive sensors are arranged, and an information processing device 2 that detects a pressure-sensitive state from the pressure-sensitive sheet 1 and determines a passing state of the moving body. ing.

  The pressure-sensitive sheet 1 is configured by dividing a number of pressure-sensitive sensors into four types of regions R1 to R4, and each region is set as a belt-like region with a constant length over the entire width. The region is set repeatedly in the order of R1, R2, R3, and R4, and the length of one set from the region R1 to R4 is set according to the transition of the pressure distribution applied to the pressure sensitive sheet when the moving body passes. Is done. For example, when detecting the passage of a pedestrian, it may be set to be slightly smaller than or substantially the same as the length of an average footprint of the pedestrian. Specifically, the length of one set is 15 to 30 cm, and is divided into four to set the regions R1 to R4. The width of each region may be set as appropriate according to the transition of the pressure distribution, or may be set by equally dividing.

  A plurality of pressure-sensitive sensors are arranged in each divided area, and when any of the pressure-sensitive sensors detects a predetermined pressure, a detection signal is processed via the common wirings 10 to 13 connected to each area. It is input to the device 2.

  The common wiring 10 is connected to all the regions R1, and when the pressure sensor detects pressure in any region R1, a detection signal is transmitted to the information processing apparatus 2 through the common wiring 10. Similarly, the common wiring 11 is connected to all the regions R2, and when the pressure sensor in any one of the regions R2 detects pressure, a detection signal is transmitted to the information processing device 2, and the common wiring 12 is connected to all the regions R3. When the pressure sensor in any one of the regions R3 is connected and detects a pressure, a detection signal is transmitted to the information processing device 2, and the common wiring 13 is connected to all the regions R4 and the pressure sensor in any one of the regions R4. When pressure is detected, a detection signal is transmitted to the information processing apparatus 2.

  FIG. 2 is a schematic perspective view illustrating an example of the pressure-sensitive sheet 1. The pressure-sensitive sheet 1 is composed of a two-layer fabric composed of an upper surface portion 100 and a lower surface portion 101, and the upper surface portion 100 and the lower surface portion 101 are integrated along the warp direction at predetermined intervals to form a large number of cylindrical spaces. Is formed inside. In the upper surface portion 100 of the pressure-sensitive sheet 1, conductive connecting yarns 15a to 15d are woven in the warp direction and conductive yarns 16a to 16d are woven in the weft direction, and the lower surface portion 101 is indicated by a dotted line. The conductive connecting yarn 14 is woven in the weft direction, and the conductive yarn 17 is woven in the warp direction.

  A plurality of conductive yarns 16a to 16d are arranged in each of the regions R1 to R4, and a plurality of conductive yarns 17 are arranged along the cylindrical space portion of the pressure sensitive sheet 1 so as to intersect the conductive yarns 16a to 16d. The book is arranged.

  In addition, the conductive yarn 16a is set in a state in which the conductive connecting yarn 15a is woven into the upper surface portion 100 in the cylindrical space portion in which the conductive connecting yarn 15a is woven, and the conductive yarn 16a is woven into which the conductive connecting yarns 15b to 15d are woven. The space portion is woven into the lower surface portion 101 and is set in an electrically non-conductive state. Similarly, the conductive yarn 16b is set in an electrically conductive state only with the conductive connecting yarn 15b, the conductive yarn 16c is set in an electrically conductive state only with the conductive connecting yarn 15c, and the conductive yarn 16d is Only the conductive connecting thread 15d is set in an electrically conductive state.

  The conductive connecting yarns 15a to 15d are connected to the common wires 10 to 13, respectively.

  Further, the conductive yarn 17 is woven so as to cross the conductive connecting yarn 14 in the lower surface portion 101 and is set in an electrically conductive state.

  FIG. 3 is a cross-sectional view in the weft direction regarding the cylindrical space portion of the pressure-sensitive sheet. The cylindrical space portion has a woven structure in which a warp made of conductive yarn 17 and nonconductive yarn 18 and a weft made of conductive yarn 16 and nonconductive yarn 19 are woven by double weaving. In a state where no pressure is applied, a state where the upper surface portion 100 and the lower surface portion 101 are separated as shown in FIG. 3 is maintained. When a predetermined pressure is applied, the upper surface portion 100 is deformed into a state of being in close contact with the lower surface portion 101, and the conductive yarn 16 on the upper surface portion 100 comes into contact with the conductive yarn 17 on the lower surface portion 101, thereby being electrically conductive. It becomes a pressure sensitive state. For this reason, the predetermined signal input to the conductive connecting thread 14 flows to the portion where the conductive threads 16 and 17 are brought into contact and become conductive, and the corresponding conductive connecting thread 15 outputs one of the common wires 10 to 13. Is output as a detection signal.

  Therefore, when even one pressure sensor is in a pressure-sensitive state in each region, a detection signal is output from the common wiring corresponding to each region.

  As described above, the intersecting portions of the conductive yarns 16 and 17 function as pressure sensors, and a plurality of pressure sensors are arranged in a matrix in the regions R1 to R4 of the pressure sensitive sheet 1. It becomes like this.

  The sensitivity of the pressure detected by each pressure sensor is determined by the strength of the woven structure in the cylindrical space portion. Therefore, it is possible to set so as to detect a plurality of different pressures by changing the material of the yarn used for the cylindrical space portion for each location to form portions having different strengths. For example, if a plurality of types of pressure-sensitive sensors having different sensitivities in each region are scattered, different pressures can be detected in each region.

  When the pressure sensitivity of the pressure sensor is set to be different, a spacer made of a linear material may be inserted into a part of the cylindrical space to change the sensitivity. Further, the pressure sensitivity of the pressure sensor may be set differently by changing the woven structure, the thickness of the yarn, and the shape of the yarn constituting the cylindrical space portion.

  In addition, the setting of each area may be set continuously other than in the case where they are set apart as shown in FIG. 2, and it is possible to reliably detect one landing operation during movement. If it is, it will not specifically limit.

  The pressure-sensitive sheet 1 can improve durability by forming a film on the surface by coating or the like. Examples of the coating material include polyurethane, vinyl chloride, rubber, polyester elastomer, and silicon materials.

  Lamination or pasting may be performed as a method other than coating. Examples of the material for the laminate include thermoplastic films, woven and knitted fabrics, nonwoven fabrics, paper, artificial leather, foams and the like.

  The information processing apparatus 2 includes a control unit 20 that performs information processing for passage detection, a storage unit 21 that stores data necessary for processing, an operation input unit 22 for inputting data, and a display for displaying data. The unit 23 is provided. The operation input unit 22 and the display unit 23 do not have to be connected to the information processing device 2 by wire, and when displaying the moving object passage state at a remote place, the display unit 23 and the information processing device 2 are connected by wireless or the like. do it.

  The control unit 20 includes a region detection unit 200 that detects pressure-sensitive states of the regions R1 to R4 of the pressure-sensitive sheet 1, a determination unit 201 that determines the passage state of the moving body based on the region detection pattern, and the determined passage state. A counting unit 202 is provided that counts the number of passages in each direction based on the number of passages.

  The region detection unit 20 detects in which region the pressure-sensitive state is generated based on the detection signal transmitted from the common wires 10 to 13. The determining unit 201 determines the passing state of the moving body based on the time-series transition of the region where the pressure sensitive state is detected.

  FIG. 4 is an explanatory diagram showing the pressure-sensitive state of the pressure-sensitive sensor when a pedestrian walks on the pressure-sensitive sheet 1. In this example, the walking operation is performed along the warp direction (direction of the conductive yarn 17).

  The conductive yarns 16a to 16d corresponding to the regions R1 to R4 are all in a non-conductive state separated from the conductive yarn 17 in a state where the shoe sole of the pedestrian does not land (FIG. 4A). First, when the heel portion of the shoe sole lands, the portion of the conductive yarn 16a corresponding to the landing portion is deformed and becomes conductive with the conductive yarn 17 (FIG. 4B). In the process of further depressing from the heel portion, pressure is applied to the shoe sole at the portion of the conductive yarn 16b, and the conductive yarn 16b is also brought into conduction with the conductive yarn 17 (FIG. 4C). And in the state which landed in the whole shoe sole, a pressure is applied also about the conductive yarns 16c and 16d, and it will be in a conductive state with the conductive yarn 17 (FIG.4 (d)).

  As described above, the pressure-sensitive states of the regions R1 to R4 change in time series according to the passing direction of the pedestrian, so that the passing direction can be reliably determined based on such time-series changes. .

For example, when a pedestrian moves in the right direction in FIG. 4, the following area detection pattern is generated.
R1 → R2 → R3
R1 → R2 → R4
R1 → R3 → R4
R2 → R3 → R4
R2 → R3 → R1
R2 → R4 → R1
R3 → R4 → R1
R3 → R4 → R2
R3 → R1 → R2
R4 → R1 → R2
R4 → R1 → R3
R4 → R2 → R3

In addition, when the pedestrian proceeds in the left direction in FIG. 4, the following area detection pattern is generated.
R1 → R4 → R3
R1 → R4 → R2
R1 → R3 → R2
R2 → R1 → R4
R2 → R1 → R3
R2 → R4 → R3
R3 → R2 → R1
R3 → R2 → R4
R3 → R1 → R4
R4 → R3 → R2
R4 → R3 → R1
R4 → R2 → R1

  The case where the region detection patterns are not continuous is included, for example, in the case of a shoe sole such as high heels, where it is assumed that one region is detected in a jump. The area detection pattern may determine the moving direction based on the detection signals of the four areas. Although it is conceivable to determine the moving direction based on the detection signals of the two regions, there is a possibility that the detection signal is output at the same time, and the detection accuracy is lowered.

  As described above, the moving direction can be accurately determined by detecting the pressure-sensitive states of three or more regions.

  The above-described area detection pattern may be obtained by trying the area detection pattern according to the passing direction in advance and stored in the storage unit 21. Then, the passage direction can be determined by comparing the region detection pattern detected by the region detection unit 200 with the pattern stored in the determination unit 201.

  The counting unit 202 counts the number of moving bodies in each passing direction based on the passing direction determined by the determining unit. When counting the number of visitors to the event venue, etc., lay a pressure sensitive sheet at the entrance and count the number of visitors and attendees. It becomes possible to grasp.

  Further, even when the passage of the vehicle is detected, a detection signal for each region can be obtained in the same manner, and the vehicle passing direction can be determined based on the region detection pattern.

  FIG. 5 is a processing flow for detecting the passage of the moving object. First, it is checked whether or not a detection signal based on the pressure sensor is output from each region (S100). If a detection signal is output, the detection timing from each region is acquired (S101). Then, an area detection pattern in which the detection timings of the areas are arranged in time series is created, and the area detection patterns stored in advance are compared and collated (S102). The passage direction is determined based on the pattern matched as a result of the collation (S103), and the passage number is counted based on the determined passage direction (S104).

  As described above, each time a detection signal from each area is output, the passage direction is determined and the number of passages is counted, so that the number of passages can be counted in real time by high-speed processing. It can be installed simply by laying one pressure sheet at the doorway, and it can be used for a wide range of purposes such as counting the number of people entering and leaving the event venue, the number of people staying in the venue, and counting the number of vehicles passing on the road. Can do.

  Polyester false twisted yarn (250 dtex / 48f) is used for the warp yarn and polyester false twisted yarn (250 dtex / 48f) is used for the weft for the fibers constituting the upper surface portion and the lower surface portion of the pressure sensitive sheet. As a conductive yarn composing the common wiring part, double covered with a polyester false twisted yarn (250 dtex / 48 f) and two copper fibers (Riken Co., Ltd., Φ = 0.05 mm) wound spirally in different twist directions. The yarn was used to weave the pressure-sensitive sheet shown in FIG.

  The created pressure-sensitive sheet has a width of 680 mm, and the pressure-sensitive sensors are arranged in a matrix at intervals of 22.5 mm, and each of the four regions R1 to R4 is a belt-like region (length 68 mm × width 680 mm). Was set to

  When a pressure sensitive sheet was installed at the entrance of a public institution building and the number of people passing was counted, the passing direction could be determined almost accurately and the number of people passing could be counted. In addition, since the pressure-sensitive sheet can be made of a flexible and durable material, it can be easily installed in an uneven installation place or an inclined place to detect passage.

  The mobile body passage detection device according to the present invention is simple and can be easily installed, so it can be installed in an event venue that is held for a limited time and used for managing the number of visitors. it can. Moreover, it can be used also for cases other than pedestrians such as managing the number of parked vehicles such as temporary parking lots or investigating traffic conditions on roads.

It is a schematic block diagram regarding embodiment which concerns on this invention. It is a schematic perspective view which shows an example of a pressure sensitive sheet. It is sectional drawing of the weft direction regarding the cylindrical space part of a pressure sensitive sheet. It is explanatory drawing which shows the pressure-sensitive state of a pressure-sensitive sensor in case a pedestrian walks on a pressure-sensitive sheet. It is a processing flow for performing passage detection of a mobile.

Explanation of symbols

1 Pressure sensitive sheet 2 Information processing device
10 Common wiring
11 Common wiring
12 Common wiring
13 Common wiring
14 Conductive connection thread
15 Conductive connection thread
16 Conductive yarn
17 Conductive yarn
100 Top surface
101 Bottom surface

Claims (4)

A pressure-sensitive sheet in which a large number of pressure-sensitive sensors that detect pressure applied when passing through the moving body are arranged, and the pressure-sensitive sensor is divided into three or more types of regions and set repeatedly, and each type of region is Compare the area detection unit that detects the pressure-sensitive state via the common wiring, the area detection pattern in which the detection timing of each area detected in the area detection unit is arranged in time series, and the previously stored area detection pattern A moving body passage detection device comprising: a determining unit that determines a passing state of the moving body.   The moving body passage detection device according to claim 1, wherein the pressure sensor includes a fiber structure using conductive fibers.   The moving body passage detection device according to claim 1, wherein the pressure-sensitive sheet includes a plurality of types of the pressure-sensitive sensors having different sensitivities.   The mobile body passage detection device according to claim 1, further comprising a counting unit that counts the number of passages in each passage direction based on the determined passage state.

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