JP7583120B1 - Sensor device and walking information communication system - Google Patents

Abstract

[Problem] To reduce battery consumption due to communication.
[Solution] A sensor device attached to a person's footwear. The sensor device includes a detection unit that detects human movement, a communication unit that transmits walking information based on the detection information detected by the detection unit to an external terminal, and a control unit that uses the detection information to determine the human movement and controls communication of the communication unit in accordance with the determined human movement. The control unit controls communication of the communication unit to enable communication on the condition that the human movement is different from a human walking movement.
[Selected Figure] Figure 4

Description

The present invention relates to a sensor device that can be attached to footwear and a communication system for walking information collected by the sensor device.

Conventionally, footwear such as shoes is known in which a small sensor device with a built-in sensor and communication device is housed in a recess in the sole. The sensor device can calculate various parameter values related to exercise (e.g., calories burned, running distance, etc.) based on data measured by the sensor, and transmit walking information such as the data measured by the sensor and the calculated parameter values to a terminal such as the user's smartphone. The user can then use the various parameter values related to exercise to help manage their own health, etc. (see, for example, Patent Document 1).

Special Publication No. 2009-535157

The sensor device attached to the footwear is required to be small, and therefore the battery that drives the sensor is also required to be small. On the other hand, the walking information stored in the sensor device needs to be transmitted to a terminal such as a smartphone, and battery consumption due to communication has been an issue.

Therefore, the objective is to provide a sensor device and walking information communication system that can reduce battery consumption due to communication.

One aspect of the present invention is a sensor device that is attached to a person's footwear and includes a detection unit that detects the movement of the person, a communication unit that transmits walking information based on the detection information detected by the detection unit to an external terminal, and a control unit that uses the detection information to determine the movement of the person and controls communication by the communication unit according to the determined movement of the person, where the control unit controls communication by the communication unit to enable communication on the condition that the movement of the person is different from a walking movement of a person.

One aspect of the present invention is a walking information communication system that includes a terminal and a sensor device attached to a person's footwear, the terminal includes a communication unit capable of communicating with the sensor device, the sensor device includes a detection unit that detects human movement, a communication unit that transmits walking information based on the detection information detected by the detection unit to the terminal, and a control unit that uses the detection information to determine the human movement and controls communication by the communication unit in accordance with the determined human movement, and the control unit controls communication by the communication unit of the sensor device to enable communication on the condition that the human movement is different from a human walking motion.

The present invention can reduce the battery consumption of the sensor device due to communication.

FIG. 1 is a left side view of a shoe 1 according to the present embodiment. FIG. 2 is a diagram showing an example of the configuration of the sole 10 and the sensor device 2, and is a plan view of the shoe 1 as viewed from directly above (top view). FIG. 3 is a perspective view of the sensor device 2. As shown in FIG. FIG. 4 is a functional block diagram of the sensor device 2. FIG. 5 is a diagram for explaining the first movement. FIG. 6 is a diagram for explaining the second movement of the first type. FIG. 7 is a diagram for explaining the second type of second movement. FIG. 8 is a diagram for explaining the slots of the memory unit 102. As shown in FIG. FIG. 9 is a schematic diagram of a walking information communication system according to the present embodiment. FIG. 10 is a flowchart showing the operation of the sensor device 2. FIG. 11 is a flowchart showing the operation of the communication process of the sensor device 2. FIG. 12 is a sequence diagram of the pairing process (Step 203) between the sensor device 2 and the wireless terminal 3. FIG. 13 is a sequence diagram of the sensor device 2 and the wireless terminal 3 in the walking information communication process (Step 204).

This section describes an embodiment of the present invention.

<Embodiment>
An embodiment of the present invention will be described. In this embodiment, a shoe 1 will be described as an example of footwear, but other footwear such as sandals may be used. Also, the shoe 1 will be described as a right-foot shoe as an example, but it may be a left-foot shoe. Also, the present invention may be applied to both right-foot and left-foot shoes.

Figure 1 is a left side view of a shoe 1 according to this embodiment. The shoe 1 has a sole 10 and a sensor device 2 that can be attached to and detached from the midfoot when the sole 10 is divided into three parts in the front-rear direction: a forefoot part, a midfoot part, and a heel part.

The sole 10 has a midsole 11 and an outer sole 12. Depending on the manufacturing method of the shoe 1, the two may be an integrated part in which there is no distinction between them. An inner sole 13 may also be provided as appropriate. The sole 10 has a fitting recess 14 on the upper surface side of the midsole 11 that can accommodate the sensor device 2.

Figure 2 shows an example of the configuration of the sole 10 and the sensor device 2, and is a plan view of the shoe 1 viewed from directly above (top view).

When viewed from above, the storage recess 14 has a fitting shape that corresponds to the external shape of the sensor device 2 stored in the midfoot portion of the midsole 11. The midsole 11 is made of, for example, EVA resin (ethylene-vinyl acetate copolymer resin). Since EVA resin is highly flexible, the storage recess 14 can be fixed in place by closely adhering to and enveloping the sensor device 2 when the sensor device 2 is attached. The detailed shape of the storage recess 14 will be described later.

Next, we will explain the sensor device 2.

When the sensor device 2 is housed in the housing recess 14 of the sole 10, it has a contour shape that is asymmetrical about the axis of symmetry A. The "asymmetrical" here refers to the left and right when the sensor device 2 is housed in the housing recess 14. In this embodiment, the shoe 1 is illustrated as being for a right foot, so the axis of symmetry A faces the front-to-rear direction of the shoe 1, with the left corresponding to the inner side of the shoe and the right corresponding to the outer side of the shoe.

Figure 3 is a perspective view of the sensor device 2.

The sensor device 2 has a main body 21 that stores a battery and electronic components, a lid 22 that is removable from the main body 21, and a fastener 23 for fastening the lid 22 to the main body 21. The battery is, for example, a button battery classified as a coin type.

The electronic components include an electronic circuit board equipped with various electronic elements, and the electronic circuit board is equipped with a three-axis acceleration sensor, a microprocessor, an IC memory, a small wireless communication device, etc. Of course, other electronic components and circuit parts can be installed.

Figure 4 is a functional block diagram of the sensor device 2.

The sensor device 2 includes a three-axis acceleration sensor 100, a control unit 101, a memory unit 102, and a wireless communication unit 103.

The three-axis acceleration sensor 100 detects acceleration in each of the three orthogonal axes X, Y and Z. In the description of this embodiment, when the sensor device 2 is attached to the shoe 1 as shown in Figures 1 and 2, the direction of acceleration detected by the three-axis acceleration sensor 100 is described as the X direction, the Y direction, the outward direction relative to the symmetry axis A, and the Z direction, the upward direction of the sensor device 2 attached to the shoe 1.

The control unit 101 is configured with a processor. The control unit 101 determines the user's movement in the shoe 1 from the measurement values of the three-axis acceleration sensor 100. The user's movement to be determined is broadly divided into a first movement and a second movement. The first movement is a normal walking movement of a person, and the second movement is a movement other than the first movement, i.e., a movement other than a normal walking movement of a person.

Figure 5 is a diagram for explaining the first movement. The first movement is a general walking motion of a user. In the case of general walking such as walking or running, the acceleration in the front-to-rear direction of the shoe connecting the forefoot to the heel is continuously detected. For example, acceleration with large values in the X direction is continuously detected. Such user movement in which acceleration with large values in the X direction is continuously detected is defined as the first movement.

The second movement can be of any type as long as it is a movement other than the first movement, i.e., a movement other than the user's general walking movement, but in this embodiment, a first type of second movement and a second type of second movement are given as examples of the second movement.

Figure 6 is a diagram for explaining the first type of second motion. The first type of second motion is a motion in which the user touches the front part (toe) of the shoe to the ground and then lifts it up again, repeating this motion a predetermined number of times. In the case of such motion, a large acceleration and impact is detected in the X direction in a short time. Such a user motion in which a short and large acceleration and impact in the X direction is detected is defined as the first type of second motion. Note that the first type of second motion may not only be a motion in which the user touches the front part (toe) of the shoe to the ground and then lifts it up again, but may also be a motion in the opposite direction, i.e., a motion in which the user touches the heel side of the shoe to the ground and then lifts it up again, repeating this motion a predetermined number of times.

Figure 7 is a diagram for explaining the second type of second movement. The second type of second movement is a movement in which the user lifts the shoe on which the sensor device 2 is attached in an outward direction, then lowers it again and touches it to the other shoe, repeating this action a predetermined number of times. In the case of such a movement, large acceleration and impact in the Z direction and Y direction are detected in a short period of time. This type of user movement is referred to as the second type of second movement.

It should be noted here that the first movement is a normal walking movement of a person, whereas the first type second movement and the second type second movement are not a walking movement of a person. The above-mentioned first type second movement and second type second movement are only examples, and other types of movement may be used as long as they are movements other than the first movement, which is a normal walking movement of a person, and can be easily distinguished from the first movement.

The control unit 101 receives the measurement values from the three-axis acceleration sensor 100 and determines whether the user's movement is a first movement, a first type of second movement, or a second type of second movement. If the movement is the first movement, the control unit 101 calculates the user's walking information from the measurement values of the three-axis acceleration sensor 100 and stores it in the memory unit 102. The walking information is, for example, the number of steps for each speed category (walking, running, galloping).

On the other hand, when the user's movement is the second movement of the first type or the second movement of the second type, the control unit 101 controls the wireless communication unit 103 to enable communication with an external wireless terminal. The control method is, for example, turning on the wireless communication unit 103 or waking up the sleep state of the wireless communication unit 103. In addition, the control unit 101 transmits various information transmitted by the wireless communication unit 103 to the wireless communication unit 103.

The memory unit 102 is a memory in which the walking information of the user is recorded. The memory unit 102 has a number of slots (records). Figure 8 is a diagram for explaining the slots of the memory unit 102. In the example of Figure 8, the memory unit 102 has 256 slots, and initially, each slot is assigned a slot identification number (SID) from 0 to 255. Each slot has a field for walking (Walk), running (Run), or dashing (Dash) according to the measurement date and time and the speed, and the measurement date and time and the number of steps taken by the user are recorded in each field.

The wireless communication unit 103 is a wireless device capable of communicating with a wireless terminal. The wireless terminal may be a smartphone carried by the user, or a wearable computer with a communication function such as a smart watch or smart glasses. The wireless communication method may be, for example, Bluetooth (registered trademark). The wireless communication unit 103 is controlled by the control unit 101 to be in a state in which it can communicate with the wireless terminal. Unless the wireless communication unit 103 is controlled by the control unit 101 to be in a state in which it can communicate, it is turned off or in a sleep state to reduce power consumption.

Next, we will explain the operation of the sensor device 2 to record walking information and the operation of communication between the sensor device 2 and the user's terminal.

Figure 9 is a schematic diagram of the walking information communication system in this embodiment. As shown in Figure 9, the walking information communication system in this embodiment is configured with a sensor device 2 attached to a user's shoe 1, the user's wireless terminal 3, and a server 4 on which the user's walking information is recorded. The wireless terminal 3 and the server 4 can be connected to a communication line N and can communicate with each other.

The communication line N refers to a communication path that allows data communication. In other words, the communication line N includes a dedicated line (dedicated cable) for direct connection, a LAN such as Ethernet (registered trademark), a telephone communication network, a cable network, the Internet, and other communication networks, regardless of whether the communication method is wired or wireless.

The wireless terminal 3 is a wireless terminal capable of acquiring walking information of the user from the sensor device 2 by a proximity wireless method such as Bluetooth (registered trademark) and transmitting the acquired walking information to the server 4. The wireless terminal 3 is, for example, a smartphone, a mobile phone, a personal computer, a tablet computer, etc.

The server 4 is a server system including one or more server devices and storage devices. The server 4 provides a service for recording the user's walking information, and can manage data necessary for operating the service and provide a service for viewing walking information from the wireless terminal 3.

Next, the operation of the sensor device 2 will be described. FIG. 10 is a flowchart showing the operation of the sensor device 2. Note that the memory unit 102 has 256 slots as shown in FIG. 8, and each slot is initially assigned a slot identification number (SID) ranging from 0 to 255 (Step 100).

First, the control unit 101 sets the slot number for recording walking information to N and sets the initial value to zero (Step 101).

The control unit 101 receives the measurement values from the three-axis acceleration sensor 100, detects the user's movement (Step 102), and determines the movement (Step 103).

If the user's movement is other than the first movement (second movement) (Step 104), the control unit 101 performs communication processing (Step 112). The communication processing (Step 112) will be described later.

If the user's movement is the first movement (Step 104), the control unit 101 acquires the detection date and time of the measurement information (Step 105). Then, measurement of the detection time begins (Step 106). If the detection time is within one hour (Step 107), the control unit 101 calculates the user's walking information from the measurement values acquired from the 3-axis acceleration sensor 100, and records the user's walking information in the slot with slot number N (Step 113).

When the detection time exceeds one hour (Step 107), the control unit 101 adds 1 to the slot number N (Step 112). If the slot number N is smaller than 255 (Step 109), the control unit 101 records the user's walking information in the slot with slot number N (Step 113).

On the other hand, if the slot number N is greater than 255 (Step 109), the control unit 101 overwrites and records the user's walking information in the slot with the smallest slot number (Step 110). The control unit 101 then sets the slot number of the overwritten slot to N (Step 111) and continues motion detection (Step 102).

In this way, the sensor device 2 records the user's walking information every day. Note that the detection time written to one slot is one hour, but this is merely an example and other times may be used.

Next, the communication process (Step 112) of the sensor device 2 will be described. FIG. 11 is an operational flowchart of the communication process of the sensor device 2.

The control unit 101 of the sensor device 2 determines the movement based on the measurement values from the three-axis acceleration sensor 100 (Step 200).

When the user's movement is the second movement of the first type (Step 201), the control unit 101 performs a pairing process (Step 203). The pairing process (Step 203) will be described later.

If the user's movement is the second movement of the second type (Step 202), the control unit 101 performs walking information communication processing (Step 204). The walking information communication processing (Step 204) will be described later.

Next, the pairing process (Step 203) will be described. FIG. 12 is a sequence diagram of the sensor device 2 and the wireless terminal 3 in the pairing process (Step 203).

First, the user launches the application (Step 400).

When the control unit 101 of the sensor device 2 detects a second motion of the first type (Step 300), it transitions the wireless communication unit 103 to a state in which it can communicate with the wireless terminal 3 (Step 301). For example, it turns on the power of the wireless communication unit 103 and cancels the sleep state. Then, the control unit 101 starts pairing with the wireless terminal 3 (Step 302). The information transmitted from the sensor device 2 to the wireless terminal 3 is the identification information of the sensor device 2.

The application of the wireless terminal 3 detects the identification information of the sensor device 2 received from the sensor device 2 (Step 401) and displays the identification information of the sensor device 2 (Step 402). When the user selects the displayed identification information of the sensor device 2 (Step 403), the application of the wireless terminal 3 stores the identification information of the sensor device 2 and transmits the identification information of the wireless terminal 3 to the sensor device 2, thereby performing pairing processing (Step 404).

The control unit 101 of the sensor device 2 receives the identification information of the wireless terminal 3, stores the identification information of the wireless terminal 3, and performs pairing processing (Step 303). Then, when the pairing processing is completed, the control unit 101 transitions the wireless communication unit 103 to a state in which communication with the wireless terminal 3 is not possible (Step 304). For example, the wireless communication unit 103 is powered off and transitions to a sleep state.

This operation reduces the power consumption of the wireless communication unit 103 and reduces the battery consumption of the sensor device 2.

Next, the operation of the walking information communication process (Step 204) will be described. FIG. 13 is a sequence diagram of the sensor device 2 and the wireless terminal 3 in the walking information communication process (Step 204).

To acquire walking information from the sensor device 2, the user starts the application (Step 600) and selects to acquire walking information (Step 601).

On the other hand, when the user performs a second type of second movement, the control unit 101 of the sensor device 2 detects the second type of second movement (Step 500), and transitions the wireless communication unit 103 to a state in which communication with the wireless terminal 3 is possible (Step 501). For example, the wireless communication unit 103 is turned on and the sleep state is canceled. Then, when the control unit 101 receives a request to obtain walking information from the wireless terminal 3 (Step 502), it reads the walking information from the memory unit 102 and transmits the walking information to the wireless terminal 3 via the wireless communication unit 103 (Step 503).

The application of the wireless terminal 3 receives the walking information from the sensor device 2 (Step 602). Then, the wireless terminal 3 transmits a notification of completion of reception of the walking information to the sensor device 2 (Step 603). In addition, the wireless terminal 3 transmits the received walking information to the server 4.

The control unit 101 of the sensor device 2 that has received the reception completion notification transitions the wireless communication unit 103 to a state in which communication with the wireless terminal 3 is not possible (Step 504). For example, the wireless communication unit 103 is powered off and transitions to a sleep state. The control unit 101 then resets the slot number of the memory unit 102 to its initial state (Step 505).

This operation reduces the power consumption of the wireless communication unit 103 and reduces the battery consumption of the sensor device 2.

In this embodiment, communication via the wireless communication unit is controlled so that it is possible, provided that the person's movement is a movement (second movement) different from walking (first movement), thereby making it possible to reduce battery consumption of the sensor device.

In addition, by defining multiple movements (e.g., a first type of second movement, a second type of second movement) that are different from the walking movement (first movement), and determining the communication process to be executed based on that movement, the sensor device can identify which communication process is being requested to be executed.
<Modification of this embodiment>
In the above-described embodiment, the first type of second movement and the second type of second movement are defined as movements other than the first movement, which is a walking movement of a person. However, only one of the movements may be defined, and both of the pairing process and the walking information communication process may be controlled to be possible.

In other words, when a first type of second movement is detected, control may be performed to enable both the pairing process and the walking information communication process. Also, when a second type of second movement is detected, control may be performed to enable both the pairing process and the walking information communication process.

By configuring it this way, users will no longer have to worry about which action to take.

In addition, some or all of the above embodiments can be described as follows, but are not limited to the following:

[Appendix 1]
A sensor device attached to a person's footwear,
A detection unit that detects human movement;
a communication unit that transmits walking information based on the detection information detected by the detection unit to an external terminal;
a control unit that determines a movement of a person using the detection information and controls communication of the communication unit in accordance with the determined movement of the person;
Equipped with
The control unit controls the communication unit to enable communication on the condition that the movement of the person is a movement different from a walking movement of a person.
Sensor device.

[Appendix 2]
The control unit uses the detection information to determine whether the movement of the person is a first movement that is a walking movement of the person or a second movement that is a movement other than the walking movement of the person, and controls the communication unit to enable communication on the condition that the movement of the person is the second movement.
2. The sensor device of claim 1.

[Appendix 3]
The second movement is at least one of a first type of second movement, which is a movement of bringing a tip portion of the footwear to which the sensor device is attached into contact with the ground, and a second type of second movement, which is a movement of bringing an inner surface of the footwear to which the sensor device is attached into contact with an inner surface of another shoe.
3. The sensor device of claim 2.

[Appendix 4]
the second movement of the first type is a movement of contacting a tip portion of the footwear to which the sensor device is attached with the ground a plurality of times;
The second type of second movement is a movement of bringing an inner surface of the footwear to which the sensor device is attached into contact with an inner surface of another shoe multiple times.
4. The sensor device of claim 3.

[Appendix 5]
The detection unit is capable of detecting acceleration of a person's movement,
The control unit determines a first movement when it detects acceleration in the person's walking direction continuously, and determines a second movement when it detects acceleration other than the first movement.
5. The sensor device according to claim 2,

[Appendix 6]
The control unit determines the motion as the first type of second motion when it detects acceleration and impact in a vertical direction relative to the person, and determines the motion as the second type of second motion when it detects acceleration and impact in an outward direction relative to the person's walking direction.
6. The sensor device according to claim 2,

[Appendix 7]
The control unit enables communication by the communication unit on the condition that the movement of the person is the second movement, and performs a pairing process with the terminal or a transmission process of the walking information to the terminal.
7. The sensor device according to claim 2,

[Appendix 8]
The control unit is
On the condition that the motion of the person is a second motion of the first type, enabling communication by the communication unit and performing a pairing process with the terminal;
enabling communication by the communication unit and transmitting the walking information to the terminal on condition that the movement of the person is a second movement of the second type;
8. The sensor device of claim 7.

[Appendix 9]
The control unit controls the communication unit not to transmit walking information when the movement of the person is a walking motion.
9. The sensor device according to claim 1 ,

[Appendix 10]
The walking information is at least one of step number information, speed information, and acceleration information.
10. The sensor device according to any one of claims 1 to 9.

[Appendix 11]
The sensor device is attached to only one of the pair of footwear.
11. A sensor device according to any one of claims 1 to 10.

[Appendix 12]
The sensor device is attached to a sole of one of the pair of footwear so as not to be rotatable.
11. The sensor device according to claim 1.

[Appendix 13]
A terminal and a sensor device attached to a person's footwear,
The terminal includes:
A communication unit capable of communicating with the sensor device,
The sensor device includes:
A detection unit that detects human movement;
a communication unit that transmits walking information based on the detection information detected by the detection unit to the terminal;
a control unit that determines a movement of a person using the detection information and controls communication of the communication unit in accordance with the determined movement of the person;
Equipped with
The control unit controls communication by a communication unit of the sensor device to be enabled on condition that the movement of the person is a movement different from a walking movement of a person.
Pedestrian information and communication system.
Although the present invention has been described above with reference to preferred embodiments, the present invention is not necessarily limited to the above-described embodiments, and can be modified and embodied in various ways within the scope of the technical concept thereof.

Reference Signs List 1 Shoe 2 Sensor device 3 Wireless terminal 4 Server 10 Sole 11 Midsole 12 Outer sole 13 Inner sole 14 Storage recess 21 Main body 22 Lid 23 Fastening part 100 Three-axis acceleration sensor 101 Control part 102 Memory part 103 Wireless communication part

Claims (12)

A sensor device attached to a person's footwear,
A detection unit that detects human movement;
a communication unit that transmits walking information based on the detection information detected by the detection unit to an external terminal;
a control unit that determines a movement of a person using the detection information and controls communication of the communication unit in accordance with the determined movement of the person;
Equipped with
The control unit controls the communication unit to enable transmission of walking information on condition that the movement of the person is a movement different from a walking movement, and controls the communication unit not to transmit the walking information on condition that the movement of the person is a walking movement.
Sensor device. The control unit uses the detection information to determine whether the movement of the person is a first movement that is a walking movement of the person or a second movement that is a movement other than the walking movement of the person, and controls the communication unit to enable communication on the condition that the movement of the person is the second movement.
The sensor device according to claim 1 . The second movement is at least one of a first type of second movement, which is a movement of bringing a tip portion of the footwear to which the sensor device is attached into contact with the ground, and a second type of second movement, which is a movement of bringing an inner surface of the footwear to which the sensor device is attached into contact with an inner surface of another shoe.
The sensor device according to claim 2 . the second movement of the first type is a movement of contacting a tip portion of the footwear to which the sensor device is attached with the ground a plurality of times;
The second type of second movement is a movement of bringing an inner surface of the footwear to which the sensor device is attached into contact with an inner surface of another shoe multiple times.
The sensor device according to claim 3 . The detection unit is capable of detecting acceleration of a person's movement,
The control unit determines that the motion is a first motion when the acceleration in the walking direction of the person is continuously detected,
If any other acceleration is detected, it is determined to be a second movement.
The sensor device according to claim 2 or 3. The control unit determines the motion as the first type of second motion when it detects acceleration and impact in a vertical direction relative to the person, and determines the motion as the second type of second motion when it detects acceleration and impact in an outward direction relative to the person's walking direction.
The sensor device according to claim 3 . The control unit enables communication by the communication unit on the condition that the movement of the person is the second movement, and performs a pairing process with the terminal or a transmission process of the walking information to the terminal.
The sensor device according to claim 2 or 3. The control unit is
On the condition that the motion of the person is a second motion of the first type, enabling communication by the communication unit and performing a pairing process with the terminal;
enabling communication by the communication unit and transmitting the walking information to the terminal on condition that the movement of the person is a second movement of the second type;
The sensor device according to claim 3 . The walking information is at least one of step number information, speed information, and acceleration information.
The sensor device according to claim 1 . The sensor device is attached to only one of the pair of footwear.
The sensor device according to claim 1 . The sensor device is attached to a sole of one of the pair of footwear so as not to be rotatable.
The sensor device according to claim 10 . A terminal and a sensor device attached to a person's footwear,
The terminal includes:
A communication unit capable of communicating with the sensor device,
The sensor device includes:
A detection unit that detects human movement;
a communication unit that transmits walking information based on the detection information detected by the detection unit to the terminal;
a control unit that determines a movement of a person using the detection information and controls communication of the communication unit in accordance with the determined movement of the person;
Equipped with
The control unit controls the communication unit of the sensor device to enable transmission of walking information on condition that the movement of the person is in a direction different from the direction of walking, and controls the communication unit of the sensor device not to transmit walking information on condition that the movement of the person is in the same direction as the direction of walking.
Pedestrian information and communication system.

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