Information acquisition system

Abstract

To provide an information acquisition system capable of efficiently reading data from a wireless tag.SOLUTION: There is provided an information acquisition system, in which a data acquisition device moves near a plurality of wireless tags and the data acquisition device acquires information from the wireless tags. The information acquisition system includes: a storage unit that stores position data about objects to which the plurality of wireless tags are attached, respectively; an identification unit that identifies a communication range of each of the plurality of wireless tags on the basis of the position data about the wireless tags stored in the storage unit; a creation unit that creates, on the basis of the communication range of each of the wireless tags identified by the identification unit, a route along which the data acquisition device should move; and a drive unit that drives an actuator for moving the data acquisition device along the route created by the creation unit.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an information acquisition system. [Background technology]

[0002] Conventionally, a technique for reading identification information of an object using a radio frequency identification (RFID) tag is known. For example, in Patent Document 1, a wireless tag is attached to a box-shaped object, and a tag reader device is flown by a drone or the like to read the identification information from the wireless tag. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-035276 Summary of the Invention [Problem to be solved by the invention]

[0004] According to the technology described in Patent Document 1, it is possible to read identification information from a wireless tag attached to a box-shaped item using a tag reader device. However, depending on the object to which the wireless tag is attached, a moving tag reader device may collide with the object, leaving room for improvement in efficiently reading identification information from wireless tags.

[0005] The present invention has been made in view of the above, and an object of the present invention is to provide an information acquisition system capable of efficiently reading data from a wireless tag. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the objective, an information acquisition system according to one aspect of the present disclosure is an information acquisition system in which a data acquisition device moves in the vicinity of a plurality of wireless tags and acquires information from the wireless tags, and includes a memory unit that stores position data relating to objects to which each of the plurality of wireless tags is attached, an identification unit that identifies the communication range of each of the plurality of wireless tags based on the position data of the wireless tags stored in the memory unit, a creation unit that creates a route along which the data acquisition device should move based on the communication range of each of the wireless tags identified by the identification unit, and a drive unit that drives an actuator to move the data acquisition device along the route created by the creation unit.

[0007] It is preferable that the storage unit of the wireless tag further stores position data of the object, and the creation unit creates a route that does not pass through the position of the object.

[0008] The wireless tag preferably has an identification information memory unit that stores identification information, a communication unit that transmits the identification information, and a sensor that detects the temperature of the object and outputs temperature data corresponding to the temperature, and the communication unit transmits the temperature data output by the sensor and the identification information.

[0009] It is preferable that the device further includes an input unit for inputting the position data, and the storage unit stores the position data inputted by the input unit.

[0010] It is preferable that the data acquisition device further includes an arm for moving the data acquisition device along the path created by the creation unit, and the arm is operated by an actuator driven by the drive unit. Effect of the Invention

[0011] According to the information acquisition system of the present disclosure, data can be efficiently read from wireless tags. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram showing an information acquisition system according to a first embodiment of the present disclosure. [Diagram 2] FIG. 2 is a diagram showing an example of a monitored object to which a wireless tag is attached. [Diagram 3] FIG. 3 is a diagram showing an example of the arrangement of wireless tags for the machine parts in FIG. [Figure 4] FIG. 4 is a diagram showing an example of a communication range of a wireless tag. [Diagram 5] FIG. 5 is a flowchart showing an operation example of the information acquisition system. [Figure 6] FIG. 6 is a diagram showing an example of location data indicating the location of a wireless tag. [Figure 7] FIG. 7 is a diagram showing an example of position data indicating the position of a monitored object. [Figure 8] FIG. 8 is a flowchart showing an operation example of the information acquisition system according to the first embodiment. [Figure 9] FIG. 9 is a diagram illustrating an information acquisition system according to the second embodiment of the present disclosure. [Figure 10] FIG. 10 is a flowchart showing an operation example of the information acquisition system according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. In the following description of each embodiment, the same or equivalent components as those in other embodiments are given the same reference numerals, and their description will be simplified or omitted. The present invention is not limited to each embodiment. In addition, the components of each embodiment include those that are replaceable and easy for a person skilled in the art, or those that are substantially the same. The configurations described below can be combined as appropriate. The configurations can be omitted, replaced, or modified within the scope of the invention. Note that in the second and subsequent embodiments, the description of matters common to the first embodiment will be omitted as appropriate, and differences will be mainly described. In particular, similar effects due to similar configurations will not be mentioned one after another for each embodiment.

[0014] (First embodiment) Fig. 1 is a diagram showing an information acquisition system according to a first embodiment of the present disclosure. In Fig. 1, the information acquisition system 100 includes a wireless tag 10, a tag reader device 20, and a monitoring terminal device 30. The wireless tag 10 is provided as an information acquisition target by the information acquisition system 100. The tag reader device 20 can acquire data from the wireless tag 10. The tag reader device 20 can also write data to the wireless tag 10. The tag reader device 20 corresponds to a data acquisition device of the present disclosure.

[0015] (Radio tag) The wireless tag 10 includes an antenna 11, a sensor 12, a control unit 13, and a power supply unit 14. The control unit 13 includes a communication unit 131 and a storage unit 132. The wireless tag 10 is, for example, an RFID tag.

[0016] The antenna 11 is a transmitting / receiving antenna, i.e., the antenna 11 functions as both a transmitting antenna and a receiving antenna.

[0017] Sensor 12 detects a physical quantity related to the object to which wireless tag 10 is attached. Sensor 12 is, for example, a temperature sensor that detects temperature. Below, a case where sensor 12 is a temperature sensor will be described. Sensor 12 detects the temperature of the object to which wireless tag 10 is attached. The temperature detected by sensor 12 is stored as temperature data in memory unit 132 of control unit 13. In other words, sensor 12 outputs temperature data according to the temperature. In this example, the object to be monitored is a bearing device that supports a roller. In other words, wireless tag 10 is attached to the bearing device, which is the object to be monitored.

[0018] The communication unit 131 can receive data wirelessly via the antenna 11. The communication unit 131 can transmit data wirelessly via the antenna 11.

[0019] The storage unit 132 stores identification information 1320 for identifying the wireless tag 10 itself. The storage unit 132 also stores the temperature detected by the sensor 12 as temperature data. The data stored in the storage unit 132 can be read out.

[0020] The power supply unit 14 supplies power to each unit in the wireless tag 10. The power supply unit 14 is, for example, a primary battery. Since power is supplied from the power supply unit 14, the wireless tag 10 can detect temperature using the sensor 12 and store the temperature data in the memory unit 132.

[0021] When a data read signal is transmitted from tag reader device 20, wireless tag 10 reads the data stored in memory unit 132 and transmits it to tag reader device 20. At this time, communication unit 131 of wireless tag 10 transmits the temperature data and identification information 1320 to tag reader device 20 in association with each other.

[0022] (Tag reader device) The tag reader device 20 includes an antenna 21, a control unit 22, a power supply unit 23, an input unit 24, and motors 25 and 26.

[0023] The antenna 21 is a transmitting / receiving antenna, i.e., the antenna 21 functions as both a transmitting antenna and a receiving antenna.

[0024] The control unit 22 has a communication unit 221, a storage unit 222, a reading unit 223, and a writing unit 224. The communication unit 221 of the control unit 22 can wirelessly transmit and receive data to and from the wireless tag 10 via the antenna 21. The communication unit 221 can also transmit and receive data to and from the monitoring terminal device 30 via the network NW. The tag reader device 20 can transmit temperature data detected by the sensor 12 of the wireless tag 10 to the monitoring terminal device 30.

[0025] The storage unit 222 stores data acquired by the communication unit 221. The storage unit 222 stores data acquired by the communication unit 221 in association with the identification information 1320. The storage unit 222 also stores various data necessary for the operation of the tag reader device 20. The storage unit 222 stores position data 2220, position data 2221, and route data 2222. The position data 2220 is data indicating the position of an object. The position data 2221 is data indicating the position of the wireless tag 10. The position data 2221 and 2221 are, for example, coordinate values ​​based on a predetermined origin, that is, coordinate values ​​in the X-axis direction, the Y-axis direction, and the Z-axis direction. The route data 2222 is data indicating a route along which the tag reader device 20 should move.

[0026] The reading unit 223 can receive data transmitted from the wireless tag 10 using the antenna 21 and the communication unit 221, and can read the data stored in the wireless tag 10. This allows the tag reader device 20 to obtain data from the wireless tag 10.

[0027] Reading unit 223 can simultaneously perform wireless communication with multiple wireless tags 10, and can simultaneously acquire temperature data from multiple wireless tags 10. At this time, the temperature data is acquired in a state in which identification information 1320 is associated with the temperature data. Therefore, tag reader device 20 acquires data from each sensor of multiple wireless tags 10 in a relatively short time. Tag reader device 20 transmits the temperature data detected by each of multiple sensors 12 to monitoring terminal device 30.

[0028] The writing unit 224 can transmit data to the wireless tag 10 using the antenna 21 and the communication unit 221. This allows the tag reader device 20 to write data to the wireless tag 10.

[0029] The identification unit 225 identifies the communication range of each of the multiple wireless tags 10 based on the position data 2221 of the wireless tags 10 stored in the memory unit 222. The communication range of the wireless tag 10 is a range in which the tag reader device 20 can wirelessly acquire the data stored in the wireless tag 10 memory unit 132.

[0030] The creation unit 226 creates a route along which the tag reader device 20 should move, based on the communication range of each wireless tag 10 identified by the identification unit 225. When creating this route, the creation unit 226 creates a route that does not pass through the position of the target object. A route is created that avoids objects and passes through the communication range of each wireless tag 10. The created route does not collide with objects and allows data to be acquired efficiently in a short time from each wireless tag 10. Tag reader device 20 stores the route created by creation unit 226 in memory unit 222 as route data 2222. By reading out route data 2222 from memory unit 222 and using it, tag reader device 20 can be moved along the same route from the next time onwards.

[0031] Driving unit 227 drives motors 25 and 26. Motors 25 and 26 correspond to actuators in the present disclosure. That is, driving unit 227 drives actuators for moving tag reader device 20 according to the path created by creation unit 226.

[0032] Power supply unit 23 supplies power to each unit in tag reader device 20. Power supply unit 23 is, for example, a primary battery.

[0033] Input unit 24 is a section for inputting data relating to the position of an object. Input unit 24 is, for example, a keyboard. Tag reader device 20 stores the data input by input unit 24 in storage unit 222 as position data 2220.

[0034] As will be described later, motor 25 is a power source for moving an arm that supports antenna 21. Motor 26 is a power source for rotating wheels provided on the base of tag reader device 20.

[0035] (Monitoring terminal device) Monitoring terminal device 30 includes a communication unit 31, a storage unit 32, a control unit 33, and a power supply unit 34. Communication unit 31 can transmit and receive data to and from tag reader device 20 via network NW. Monitoring terminal device 30 may be provided near tag reader device 20, or may be provided in a remote location.

[0036] The storage unit 32 stores data acquired by the tag reader device 20 from the wireless tag 10. The control unit 33 includes, for example, a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), an input interface, and an output interface, all of which are not shown. The CPU, ROM, and RAM are connected by an internal bus, all of which are not shown. Programs such as BIOS are stored in the ROM. The CPU uses the RAM as a work area and executes programs stored in the ROM or the storage unit 32 to realize various functions. The control unit 33 can perform editing, such as classification and sorting, on the data stored in the storage unit 32. The power supply unit 34 supplies power to each unit of the monitoring terminal device 30.

[0037] (Examples of objects) Fig. 2 is a diagram showing an example of a monitored object to which a wireless tag 10 is attached. Fig. 2 shows a case in which a bearing device of a mechanical device 200 is the monitored object.

[0038] 2, the machine 200 is, for example, a roller conveyor that transports industrial products (not shown) along a transport direction. The machine 200 includes a support base 70 and a plurality of roller devices 60-1 to 60-5. Hereinafter, the roller devices 60-1 to 60-5 may be collectively referred to as "roller device 60." In this embodiment, the number of roller devices 60 is five, but is not limited to this number.

[0039] The roller device 60-1 includes a roller member 50-1, a pair of mechanical parts 40-1 and 40-2, and a shaft member 41-1. The pair of mechanical parts 40-1 and 40-2 are provided on both ends of the roller member 50-1. The shaft member has a cylindrical shape extending along the central axis. The roller member 50-1 has a cylindrical shape and is disposed on the circumferential side surface of the shaft member 41-1, and rotates integrally with the shaft member 41. Both ends of the shaft member 41-1 are exposed from the roller member 50-1.

[0040] The pair of mechanical parts 40-1, 40-2 support the roller member 50-1 so as to be rotatable relative to one another. Specifically, the pair of mechanical parts 40-1, 40-2 support both ends of the shaft member 41-1 so as to be rotatable relative to one another. The mechanical parts 40-1, 40-2 are, for example, plummer blocks. The mechanical parts 40-1, 40-2 are fixed to the support base 70, for example, by bolts (not shown).

[0041] Similarly, the roller devices 60-2 to 60-5 include roller members 50-2 to 50-5 and a pair of mechanical parts 40-3 to 40-10. The mechanical parts 40-3 to 40-10 are provided on both ends of the roller members 50-2 to 50-5. The mechanical parts 40-3 to 40-10 support the roller members 50-2 to 50-5 so that they can rotate relative to each other.

[0042] Hereinafter, the roller members 50-1 to 50-5 in Fig. 2 may be collectively referred to as "roller members 50." Hereinafter, the mechanical components 40-1 to 40-10 in Fig. 2 may be collectively referred to as "mechanical component 40."

[0043] Tag reader device 20 is provided near roller device 60. Tag reader device 20 includes antenna 21, arm 27, base portion 29, and wheels 28a and 28b. Base portion 29 includes motor 26.

[0044] Arm 27 supports antenna 21 of tag reader device 20. Arm 27 is rotationally driven by motor 25. This allows arm 27 to move as shown by arrow 80. As a result, the movement of arm 27 allows the position of antenna 21 in the Z-axis direction, i.e., the height, to be changed.

[0045] Wheels 28a and 28b provided on base portion 29 of tag reader device 20 are driven by motor 26. Tag reader device 20 can be moved by rotation of wheels 28a and 28b as indicated by dashed arrows 81, 82 and 83. This allows the position of antenna 21 of tag reader device 20 to be changed in the X-axis and Y-axis directions.

[0046] Motor 26 rotates, for example, an axle (not shown) provided on base portion 29 of tag reader device 20, thereby rotating wheels 28a and 28b. This makes it possible to change the position of antenna 21 of tag reader device 20 in the X-axis and Y-axis directions.

[0047] The position of the monitored object to which each wireless tag 10 is attached is stored as position data 2220 in memory unit 222 of tag reader device 20. For example, with origin P as a reference, coordinate values ​​in the X-axis direction, Y-axis direction, and Z-axis direction indicating the position of the object are stored as position data 2220 in memory unit 222.

[0048] The position of each wireless tag 10 is stored as position data 2221 in the memory unit 222 of the tag reader device 20. For example, with respect to the origin P, coordinate values ​​in the X-axis direction, the Y-axis direction, and the Z-axis direction indicating the position of the wireless tag 10 are stored as the position data 2221 in the memory unit 222.

[0049] Fig. 3 is a diagram showing an example of the arrangement of wireless tags with respect to the machine components in Fig. 2. Fig. 4 is a diagram showing an example of the communication range of wireless tag 10. Hereinafter, wireless tags 10-1 to 10-10 in Fig. 2 may be collectively referred to as "wireless tag 10". Hereinafter, shaft members 41-1 to 41-10 may be collectively referred to as "shaft member 41". Hereinafter, bearings 42-1 to 42-10 in Fig. 2 may be collectively referred to as "bearings 42".

[0050] In Fig. 3, the mechanical component 40 has a bearing 42. The bearing 42 has a through hole into which an end of a shaft member 41 of a roller member (see Fig. 2) is inserted. The shaft member 41 is provided to extend in the Y-axis direction. The bearing 42 rotatably supports the shaft member 41. As shown in Fig. 3, in this example, a wireless tag 10 is attached to a side surface of the mechanical component 40.

[0051] In the case where the mechanical part 40 is made of a conductive material such as metal, when the wireless tag 10 is attached to the mechanical part 40, a range is generated in which it is difficult to exchange data between the wireless tag 10 and the tag reader device 20 (see FIG. 2). That is, in the space blocked by the mechanical part 40, it is difficult to exchange data between the wireless tag 10 and the tag reader device 20. For example, the range of angle θ in FIG. 3 is an angle range in which the communication distance can be made longer, and the range other than angle θ is a range in which it is difficult to exchange data between the wireless tag 10 and the tag reader device 20. In this example, the communication range in which the communication distance between the wireless tag 10 and the tag reader device 20 can be set longer is set to the path along which the antenna 21 of the tag reader device 20 moves. For example, the path is set so that the antenna 21 passes above each wireless tag 10 while driving the arm 27. By setting the path in this way, it is possible to pass through and patrol while acquiring data of all monitored objects without omission, while keeping a large distance from the bearing device.

[0052] In Fig. 4, when the mechanical part 40 is not provided, the communication range H of the wireless tag 10 is, for example, a substantially spherical range centered on the wireless tag 10. In Fig. 4, the communication range H is viewed from the Y-axis direction, so the communication range H is circular. In contrast, the space blocked by the mechanical part 40 is excluded from the communication range H, so the communication range C of the wireless tag 10 is, for example, approximately 1 / 4 of the sphere as shown in Fig. 4.

[0053] Returning to FIG. 2, communication ranges C1 to C10 are generated corresponding to the wireless tags 10-1 to 10-10. When the antenna 21 of the tag reader device 20 is within the communication range C1, the tag reader device 20 can acquire data of the wireless tag 10-1. Similarly, for the other communication ranges C2 to C10, when the tag reader device 20 is within the communication ranges C2 to C10, the tag reader device 20 can acquire data of the wireless tags 10-2 to 10-10. Therefore, by moving the tag reader device 20 so that the antenna 21 passes through the communication ranges C1 to C10, the data of the wireless tags 10-1 to 10-10 can be acquired efficiently. Specifically, the motor 26 rotates the wheels 28a and 28b, and the tag reader device 20 is moved in the direction of the dashed arrow 81, then in the direction of the dashed arrow 82, and further in the direction of the dashed arrow 83. While the tag reader device 20 is moving along the path in this manner, the motor 25 drives the arm 27 to adjust the height of the antenna 21. In this way, by controlling the two motors 25 and 26 which are actuators, the moving antenna 21 can pass through the communication ranges C1 to C10 in sequence. In other words, by adjusting the height of the antenna 21 while the tag reader device 20 moves along the route, the data of the wireless tags 10-1 to 10-10 can be efficiently acquired.

[0054] When the positions of wireless tags 10-1 to 10-10 in the Z-axis direction, i.e., in the height direction, are the same, the positions of the communication ranges in the Z-axis direction are the same. In that case, tag reader device 20 may be moved while arm 27 is fixed at a constant height.

[0055] On the other hand, if the positions of wireless tags 10-1 to 10-10 in the Z-axis direction are not the same, the positions of the communication ranges in the Z-axis direction will be different. In that case, as described above, arm 27 is driven by motor 25 to adjust the position of antenna 21 in the Z-axis direction, i.e., the height, while tag reader device 20 is moved. By moving tag reader device 20 while adjusting the height of antenna 21 in this way, the data of wireless tags 10-1 to 10-10 can be acquired efficiently.

[0056] In addition, when the tag reader device 20 is moved, it is necessary to prevent a part of the tag reader device 20, such as the antenna 21, from colliding with the mechanical components 40-1 to 40-10. In this example, position data 2220 indicating the positions of the mechanical components 40-1 to 40-10 is stored in advance in the storage unit 222. Then, the creation unit 226 creates a route for the tag reader device 20 to move so as not to collide with the mechanical components 40-1 to 40-10, and moves the tag reader device 20 along the route. Regardless of the positions of the mechanical components 40-1 to 40-10, the creation unit 226 can create an appropriate route by storing the positions of the mechanical components 40 in advance and using the stored positions. Even if the position of the mechanical component 40 is changed, the creation unit 226 can create an appropriate route by storing the changed position and using the stored positions.

[0057] Further, a wireless tag 10 is attached to the mechanical component 40. The wireless tag 10 is provided, for example, on a side surface of the mechanical component 40. The wireless tag 10 is attached, for example, by an adhesive tape to the surface of the mechanical component 40. The wireless tag 10 has the sensor 12 (see FIG. 1 ) as described above. Temperature data detected by the sensor 12 is stored in a memory unit 132 in the wireless tag 10, and the temperature data is transmitted to the tag reader device 20 together with identification information 1320.

[0058] 2, one tag reader device 20 is provided for one mechanical device 200. One mechanical device 200 has five roller members 50-1 to 50-5, and wireless tags 10-1 to 10-10 are attached to a total of ten mechanical components 40-1 to 40-10 provided at both ends of each of the roller members 50-1 to 50-5. The tag reader device 20 moves as indicated by dashed arrows 81, 82, and 83, and can thereby acquire identification information 1320 and temperature data from each of the ten wireless tags 10-1 to 10-10.

[0059] It is also possible to provide a wireless tag 10 on one of the mechanical components 40 at both ends of the roller member 50, and not provide a wireless tag 10 on the other mechanical component 40. Wireless tags 10 may be provided on only some of the multiple mechanical components 40 provided in the mechanical device 200, and these may be monitored.

[0060] (Example of operation) 5 is a flow chart showing an example of the operation of the information acquisition system 20. FIG. 5 shows preparation processing before information acquisition by tag reader device 20.

[0061] 5, first, position data 2220 indicating the position of an object and position data 2221 of each wireless tag 10 are input by input unit 24 of tag reader device 20 (step S21). Tag reader device 20 stores input position data 2220, 2221 in storage unit 222 (step S22). Identification unit 225 of tag reader device 20 identifies the communication range of each of the multiple wireless tags 10 based on the position data 2221 stored in storage unit 222 (step S23).

[0062] The creation unit 226 creates a route along which the tag reader device 20 should move, based on the communication range of each wireless tag 10 identified by the identification unit 225 and the position data 2220 of each object (step S24). The route created by the creation unit 226 is stored in the storage unit 222 as route data 2222 (step S25).

[0063] Fig. 6 is a diagram showing an example of position data 2221 indicating the position of the wireless tag 10. In Fig. 6, the position data 2221 of this example includes wireless tag identification information 1320 (rfid0001, rfid0002, ...) and coordinate values ​​indicating the installation position of the wireless tag. The coordinate values ​​indicating the installation position of the wireless tag are coordinate values ​​in the X-axis direction, the Y-axis direction, and the Z-axis direction (X, Y, Z ...) based on the origin P in Fig. 2.

[0064] Fig. 7 is a diagram showing an example of position data 2220 indicating the position of a monitored object. In Fig. 7, the position data 2220 in this example includes information (J0001, J0002, ...) that identifies the bearing that is the object, and coordinate values ​​that indicate the installation position of the bearing. The coordinate values ​​that indicate the installation position of the bearing are coordinate values ​​(x, y, z ...) in the X-axis direction, Y-axis direction, and Z-axis direction, based on the origin P in Fig. 2.

[0065] 8 is a flowchart showing an example of the operation of the information acquisition system 100 according to the first embodiment.

[0066] 8, steps S101 to S106 show an example of the operation of the wireless tag 10, steps S200 to S204 show an example of the operation of the tag reader device 20, and steps S301 to S302 show an example of the operation of the monitoring terminal device 30. In FIG.

[0067] In FIG. 8, the wireless tag 10 acquires temperature data from the sensor 12 in advance (step S101), and stores the data in the storage unit 132 (step S102).

[0068] Tag reader device 20 starts moving along the route (step S200). At this time, the height of antenna 21 is adjusted by arm 27. When a data read signal is transmitted from tag reader device 20 to wireless tag 10 (step S201), wireless tag 10 receives the read signal (step S103). Then, wireless tag 10 acquires temperature data from sensor 12 (step S104) and reads out identification information 1320 stored in memory unit 132 (step S105). Wireless tag 10 transmits the temperature data together with the identification information (step S106), and tag reader device 20 receives it (step S202).

[0069] Tag reader device 20 stores the received temperature data and identification information 1320 in storage unit 222 (step S203). Thereafter, tag reader device 20 transmits the temperature data and identification information 1320 (step S204), which is received by monitoring terminal device 30 (step S301). Monitoring terminal device 30 stores the received temperature data and identification information 1320 in storage unit 32 (step S302). Through the above process, monitoring terminal device 30 can acquire the temperature data and identification information 1320, and can edit the data stored in storage unit 32, such as by classifying and sorting the data. By utilizing the data stored in storage unit 32, the monitoring target can be monitored.

[0070] According to the information acquisition system of the first embodiment, tag reader device 20 moves along a route created by the tag reader device, and data can be acquired efficiently without colliding with monitored objects.

[0071] Second embodiment Fig. 9 is a diagram showing an information acquisition system according to a second embodiment of the present disclosure. In Fig. 9, the information acquisition system 100a according to the second embodiment differs from the information acquisition system 100 according to the first embodiment in that the information acquisition system 100a according to the second embodiment includes a wireless tag 10a that does not include a power supply unit. The wireless tag 10a operates with power based on electromagnetic waves transmitted by a tag reader device 20. That is, when the antenna 11 of the wireless tag 10a receives electromagnetic waves transmitted from the tag reader device 20, a current flows due to induction by the received electromagnetic waves. The wireless tag 10a operates using this current as a power source.

[0072] In the information acquisition system according to the above-described first embodiment, the temperature is detected by the sensor 12 of each wireless tag 10 at a predetermined cycle, for example, and is stored sequentially in the storage unit 132. When a data read signal is transmitted from the tag reader device 20 to the wireless tag 10, the stored temperature data and identification information 1320 are transmitted from the wireless tag 10 to the tag reader device 20.

[0073] In contrast, in the information acquisition system 100a according to the second embodiment, when a data read signal is transmitted from the tag reader device 20 to the wireless tag 10a, the temperature is detected by the sensor 12. That is, the wireless tag 10a operates by power based on the electromagnetic waves of the read signal, and the temperature is detected by the sensor 12. Other operations of the information acquisition system 100a are similar to those of the information acquisition system 100 according to the first embodiment.

[0074] (Example of operation) Fig. 10 is a flow chart showing an example of the operation of the information acquisition system 100a according to the second embodiment. Fig. 10 shows the operation of the wireless tag 10a, the tag reader device 20, and the monitoring terminal device 30 of the information acquisition system 100a.

[0075] 10, steps S103 to S106 show an example of the operation of the wireless tag 10a, steps S200 to S204 show an example of the operation of the tag reader device 20, and steps S301 to S302 show an example of the operation of the monitoring terminal device 30. In FIG.

[0076] 10, when a data read signal is transmitted from tag reader device 20 to wireless tag 10a (step S201), wireless tag 10a receives the read signal (step S103). Wireless tag 10a then acquires temperature data from sensor 12 (step S104) and reads out the temperature data and identification information 1320 stored in memory unit 132 (step S105). Wireless tag 10a transmits the temperature data together with identification information 1320 (step S106), which is received by tag reader device 20 (step S202).

[0077] The subsequent operations are the same as those of the information acquisition system 100 described with reference to Fig. 8. That is, the tag reader device 20 stores the received temperature data and identification information 1320 in the storage unit 222 (step S203). Thereafter, the tag reader device 20 transmits the temperature data and identification information 1320 (step S204), and the monitoring terminal device 30 receives it (step S301). The monitoring terminal device 30 stores the received temperature data and identification information 1320 in the storage unit 32 (step S302). The monitoring terminal device 30 can acquire the temperature data and identification information 1320 by the above process, and can edit the data stored in the storage unit 32, such as by classifying and sorting. By utilizing the data stored in the storage unit 32, the object to be monitored can be monitored.

[0078] According to the information acquisition system of the second embodiment, tag reader device 20 moves along a route created by the tag reader device, and thus data can be acquired efficiently without colliding with monitored objects.

[0079] (Modification) Although the above describes a case where the physical quantity detected by the sensor 12 is temperature, other physical quantities may be detected. The sensor 12 may be, for example, an acceleration sensor that detects vibration. By detecting vibration, it is possible to detect bearing defects at an early stage.

[0080] In addition, although the above uses rectangular coordinate values ​​with the origin P as a reference as the position data, polar coordinate values ​​with the origin P as a reference may be used instead as the position data.

[0081] (summary) According to the information acquisition system 100 of the first embodiment or the information acquisition system 100a of the second embodiment described above, in production facilities such as a factory site, data can be acquired efficiently and production facilities can be monitored without a maintenance inspector having to go directly to the vicinity of the machinery. Specifically, it is possible to realize a sign of an abnormality caused by a temperature change and to identify the bearing. For example, it is possible to monitor and process the temperature in a remote control room. In each of the above embodiments, the bearing is the object of monitoring, but this is not limited thereto, and for example, it is possible to monitor shaft elongation due to heat, rated motor operation, etc. [Explanation of symbols]

[0082] 10, 10a Wireless tag 11, 21 Antenna 12 Sensors 13, 22, 33 Control section 14, 23, 34 Power supply section 20 Tag reader device 24 Input section 25, 26 Motor 27 Arm 28a, 28b wheels 29 Base 30 Monitoring terminal device 31, 131, 221 Communications Department 32, 132, 222 storage section 40-1~40-10 Machine parts 41-1~41-10 Shaft member 42-1~42-10 Bearings 50-1~50-5 Roller member 60-1~60-5 Roller device 70 Support stand 100, 100a Information Acquisition System 200 Mechanical equipment 223 Reading Unit 224 Writing section 225 Specific part 226 Creation Department 227 Drive Unit 1320 Identification Information 2220, 2221 Location Data 2222 Route Data C, C1~C10, H Communication range

Claims

1. An information acquisition system in which a data acquisition device moves in the vicinity of a plurality of wireless tags and acquires information from the wireless tags, a memory unit that stores position data relating to objects to which the plurality of wireless tags are attached, an identification unit that identifies a communication range for each of the plurality of wireless tags based on the position data of the wireless tags stored in the memory unit, a creation unit that creates a route along which the data acquisition device should move based on the communication range for each of the wireless tags identified by the identification unit, and a drive unit that drives an actuator to move the data acquisition device along the route created by the creation unit. An information acquisition system including:

2. the storage unit of the wireless tag further stores position data of the object; The creation unit creates a path that does not pass through the position of the object. The information acquisition system according to claim 1 .

3. The wireless tag includes: an identification information storage unit that stores identification information; A communication unit that transmits the identification information; a sensor that detects a temperature of the object and outputs temperature data corresponding to the temperature; having The communication unit transmits the temperature data output by the sensor and the identification information. The information acquisition system according to claim 2 .

4. further comprising an input unit for inputting the position data; The storage unit stores the position data input by the input unit.

4. An information acquisition system according to claim 1.

5. The data acquisition device further includes an arm for moving the data acquisition device along the path created by the creation unit; The arm is operated by an actuator driven by the drive unit.

4. An information acquisition system according to claim 1.

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