Wireless system

Abstract

SOLUTION: A wireless system 10 includes a first base wireless device 14B, a first sensor device 18B that wirelessly communicates with the first base wireless device, and a first wireless power supply device 20D that wirelessly supplies power to the first sensor device by using microwaves, wherein a wireless communication link paired in advance is established between the first base wireless device and the first sensor device, The first sensor device outputs a signal corresponding to the stroke position of the actuator 72, and the sensor element 60 included in the first sensor device includes a magnetic sensor.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to wireless systems. [Background technology]

[0002] Japanese Patent No. 5497730 discloses an FA system in which a PC and a controller are connected via a field network. In Japanese Patent No. 5497730, wireless messages are sent and received. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5497730 Summary of the Invention [Problem to be solved by the invention]

[0004] Recently, there has been a demand for a better system.

[0005] The present invention aims to solve the above-mentioned problems. [Means for solving the problem]

[0006] A wireless system according to one embodiment of the present invention comprises a first base wireless device, a first sensor device that communicates wirelessly with the first base wireless device, and a first wireless power supply device that wirelessly supplies power to the first sensor device using microwaves, wherein a pre-paired wireless communication link is established between the first base wireless device and the first sensor device, the first sensor device outputs a signal corresponding to the stroke position of an actuator, and the sensor element provided in the first sensor device includes a magnetic sensor. [Effects of the Invention]

[0007] According to the present invention, a good wireless system can be provided. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing the configuration of a wireless system according to the first embodiment. [Figure 2] FIG. 2 is a block diagram showing a wireless system according to the first embodiment. [Figure 3] FIG. 3 is a diagram illustrating an example of production equipment. [Figure 4] FIG. 4 is a diagram showing the configuration of a wireless system according to the second embodiment. [Figure 5] FIG. 5 is a block diagram showing a wireless system according to the second embodiment. [Figure 6] FIG. 6 is a diagram showing the configuration of a wireless system according to the third embodiment. [Figure 7] FIG. 7 is a diagram showing a part of a wireless system according to the third embodiment. [Figure 8] FIG. 8 is a diagram showing a part of a wireless system according to the fourth embodiment. [Figure 9] FIG. 9 is a diagram showing the configuration of a wireless system according to the fifth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] [First embodiment] A wireless system according to a first embodiment will be described with reference to Fig. 1 to Fig. 3. Fig. 1 is a diagram showing the configuration of a wireless system according to this embodiment. Fig. 2 is a block diagram showing a wireless system according to this embodiment. Fig. 3 is a diagram showing an example of production equipment.

[0010] 1, a wireless system 10 according to this embodiment may include a computer 12, a base wireless device 14, a remote wireless device 16, a sensor device 18, and a wireless power supply device 20. The wireless system 10 may include multiple base wireless devices 14. One computer 12 and multiple base wireless devices 14 may be connected via a field bus 21. Two of the multiple base wireless devices 14 are shown in FIG. 1.

[0011] The base radio device 14 and the remote radio device 16 may be paired in advance. A synchronous connection may be established between the paired base radio device 14 and the remote radio device 16. A plurality of remote radio devices 16 may be synchronously connected to one base radio device 14. The base radio device 14 may wirelessly transmit and receive signals to and from a plurality of remote radio devices 16.

[0012] Pairing may be performed in advance between the remote radio device 16 and the sensor device 18. A synchronous connection may be performed between the paired remote radio device 16 and the sensor device 18. A plurality of sensor devices 18 may be synchronously connected to one remote radio device 16. The remote radio device 16 may wirelessly transmit and receive signals to and from a plurality of sensor devices 18.

[0013] A network 22 can be configured by synchronously connecting the base radio device 14 and the remote radio device 16, and by synchronously connecting the remote radio device 16 and the sensor device 18. A plurality of networks 22 can be configured in the radio system 10. Two of the plurality of networks 22 are shown in FIG. 1 .

[0014] The computer 12 may monitor and control a production facility (industrial facility) 70 (see FIG. 3). For example, a programmable logic controller (PLC) may be used as the computer 12, but is not limited to this. As shown in FIG. 2, the computer 12 may include, for example, a calculation unit 24 and a storage unit 26.

[0015] The calculation unit 24 may include a processor such as a CPU (Central Processing Unit). That is, the calculation unit 24 may include processing circuitry. The calculation unit 24 may be equipped with a control unit 30. The calculation unit 24 may also include components other than the control unit 30; however, for simplicity of explanation, components other than the control unit 30 are omitted here. The control unit 30 is responsible for overall control of the computer 12. The control unit 30 may monitor and control the production equipment 70. The control unit 30 may be realized by the calculation unit 24 executing a program stored in the memory unit 26. Note that at least a portion of the control unit 30 may be realized by an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array). At least a portion of the control unit 30 may be an electronic circuit including discrete devices.

[0016] The storage unit 26 may include a volatile memory (not shown) and a non-volatile memory (not shown). Examples of the volatile memory include a random access memory (RAM). The volatile memory is used as a working memory for the processor and temporarily stores data necessary for processing or calculation. Examples of the non-volatile memory include a read-only memory (ROM) and a flash memory. The non-volatile memory is used as a storage memory and stores programs, tables, maps, etc. At least a portion of the storage unit 26 may be included in the processor, integrated circuit, etc. described above. The storage unit 26 may further include a hard disk drive (HDD), a solid state drive (SSD), etc.

[0017] The computer 12 may further include an input / output interface 28 for implementing a Fieldbus connection. The computer 12 may communicate with the base radio device 14 via the Fieldbus 21.

[0018] The base radio device 14 may include, for example, a calculation unit 32 and a storage unit 34 .

[0019] The calculation unit 32 may include a processor such as a CPU. That is, the calculation unit 32 may include a processing circuit. The calculation unit 32 may be equipped with a control unit 36 ​​and a transmission / reception processing unit 38. The calculation unit 32 may also include components other than these components, but for simplicity of explanation, these components will be omitted here. The control unit 36 ​​and the transmission / reception processing unit 38 may be implemented by the calculation unit 32 executing a program stored in the memory unit 34. The control unit 36 ​​is responsible for overall control of the base radio device 14. Note that at least a portion of the control unit 36 ​​and the transmission / reception processing unit 38 may be implemented by an integrated circuit such as an ASIC or FPGA. At least a portion of the control unit 36 ​​and the transmission / reception processing unit 38 may be implemented by an electronic circuit including discrete devices.

[0020] The storage unit 34 may include a volatile memory (not shown) and a non-volatile memory (not shown). Examples of the volatile memory include RAM. The volatile memory is used as a working memory for the processor and temporarily stores data necessary for processing or calculation. Examples of the non-volatile memory include ROM and flash memory. The non-volatile memory is used as a storage memory and stores programs, tables, maps, etc. At least a portion of the storage unit 34 may be provided in the processor, integrated circuit, etc. described above.

[0021] The base radio 14 may further include an input / output interface 40 for implementing a Fieldbus connection. The base radio 14 may be connected to the computer 12 by the Fieldbus 21, as described above.

[0022] The base radio device 14 may further include a communication unit 42 for performing wireless communication. The base radio device 14 may perform wireless communication with the remote radio device 16 using the communication unit 42.

[0023] The remote radio device 16 may include, for example, a processing unit 44 and a storage unit 46 .

[0024] The calculation unit 44 may include a processor such as a CPU. That is, the calculation unit 44 may include a processing circuit. The calculation unit 44 may include a control unit 48 and a transmission / reception processing unit 50. The calculation unit 44 may also include components other than these components, but for simplicity of explanation, these components will be omitted here. The control unit 48 and the transmission / reception processing unit 50 may be implemented by the calculation unit 44 executing a program stored in the storage unit 46. The control unit 48 is responsible for overall control of the remote radio device 16. Note that at least a portion of the control unit 48 and the transmission / reception processing unit 50 may be implemented by an integrated circuit such as an ASIC or FPGA. At least a portion of the control unit 48 and the transmission / reception processing unit 50 may be implemented by an electronic circuit including discrete devices.

[0025] The storage unit 46 may include a volatile memory (not shown) and a non-volatile memory (not shown). Examples of the volatile memory include RAM. The volatile memory is used as a working memory for the processor and temporarily stores data necessary for processing or calculation. Examples of the non-volatile memory include ROM and flash memory. The non-volatile memory is used as a storage memory and stores programs, tables, maps, etc. At least a portion of the storage unit 46 may be provided in the processor, integrated circuit, etc. described above.

[0026] The remote radio device 16 may further include communication units 52A and 52B for wireless communication. The remote radio device 16 may use the communication unit 52A to perform wireless communication with the base radio device 14. The remote radio device 16 may also use the communication unit 52B to perform wireless communication with the sensor device 18. The wireless communication between the base radio device 14 and the remote radio device 16 and the wireless communication between the remote radio device 16 and the sensor device 18 do not need to be synchronized. The protocol for the wireless communication between the base radio device 14 and the remote radio device 16 may be the same as or different from the protocol for the wireless communication between the remote radio device 16 and the sensor device 18. Using different protocols for the wireless communication between the base radio device 14 and the remote radio device 16 and the wireless communication between the remote radio device 16 and the sensor device 18 may contribute to reducing the amount of data in wireless communication. Furthermore, the frequency band used in the wireless communication between the base radio device 14 and the remote radio device 16 may be the same as or different from the frequency band used in the wireless communication between the remote radio device 16 and the sensor device 18. Making the frequency band used in the wireless communication between the base radio device 14 and the remote radio device 16 different from the frequency band used in the wireless communication between the remote radio device 16 and the sensor device 18 can contribute to reducing the amount of data in the wireless communication, etc.

[0027] The sensor device 18 may include, for example, a calculation unit 56 , a storage unit 58 , and a sensor element 60 .

[0028] The calculation unit 56 may include a processor such as a CPU. That is, the calculation unit 56 may include a processing circuit. The calculation unit 56 may include a control unit 62 and a transmission / reception processing unit 64. The calculation unit 56 may include components other than these components, but for simplicity of explanation, these components will be omitted here. The control unit 62 and the transmission / reception processing unit 64 may be implemented by the calculation unit 56 executing a program stored in the storage unit 58. The control unit 62 is responsible for overall control of the sensor device 18. Note that at least a portion of the control unit 62 and the transmission / reception processing unit 64 may be implemented by an integrated circuit such as an ASIC or FPGA. At least a portion of the control unit 62 and the transmission / reception processing unit 64 may be implemented by an electronic circuit including discrete devices.

[0029] The storage unit 58 may include a volatile memory (not shown) and a non-volatile memory (not shown). Examples of the volatile memory include RAM. The volatile memory is used as a working memory for the processor and temporarily stores data necessary for processing or calculation. Examples of the non-volatile memory include ROM and flash memory. The non-volatile memory is used as a storage memory and stores programs, tables, maps, etc. At least a portion of the storage unit 58 may be provided in the processor, integrated circuit, etc. described above.

[0030] The sensor element 60 is, for example, a magnetic sensor, but is not limited to this.

[0031] 3 is a diagram showing an example of a production facility. The production facility 70 may be equipped with an actuator 72. The sensor device 18 may be equipped in the actuator 72, for example, but is not limited to this. The actuator 72 may be equipped with, for example, but is not limited to, a cylinder device. The sensor device 18 may output a signal corresponding to, for example, but is not limited to, the stroke position of the actuator 72. The actuator 72 may be equipped with one sensor device 18 or multiple sensor devices 18.

[0032] 2, the sensor device 18 may further include a communication unit 66 for wireless communication. The sensor device 18 may use the communication unit 66 to perform wireless communication with the remote wireless device 16.

[0033] The sensor device 18 may further include a wireless power receiving unit 68. The wireless power receiving unit 68 may receive power supplied wirelessly from the wireless power supply device 20. The wireless power receiving unit 68 receives the power supplied from the wireless power supply device 20 via an antenna (not shown). The wireless power receiving unit 68 may include a rectifier circuit (not shown) and the like. The rectifier circuit rectifies the AC power received from the wireless power supply device 20 to generate DC power. The wireless power receiving unit 68 may supply DC power to each component of the sensor device 18.

[0034] The wireless power supply device 20 can supply power wirelessly. The wireless power supply device 20 can supply power wirelessly to a plurality of sensor devices 18, but is not limited to this. The wireless power supply device 20 can supply power wirelessly via an antenna 74 (see FIG. 7). The wireless power supply device 20 can supply power wirelessly using electromagnetic waves. For example, microwaves can be used as such electromagnetic waves. The frequency band of microwaves used for wireless power supply is, for example, the 920 MHz band, but is not limited to this. For example, microwaves in the 2.4 GHz frequency band can be used for the wireless power supply. Furthermore, for example, microwaves in the 5.7 GHz frequency band can be used for the wireless power supply.

[0035] As described above, wireless communication can be performed between the sensor device 18 and the remote wireless device 16. The frequency band used in the wireless communication between the sensor device 18 and the remote wireless device 16 is, for example, the Industry-Science-Medical Band (ISM band).

[0036] As described above, wireless communication can be performed between the remote radio device 16 and the base radio device 14. The frequency band used in the wireless communication between the remote radio device 16 and the base radio device 14 is, for example, the industrial, scientific, and medical frequency band.

[0037] The computer 12, the base radio 14, and the remote radio 16 may be powered by wires.

[0038] In this way, the wireless system 10 according to this embodiment is configured.

[0039] As described above, according to the present embodiment, power can be supplied to the sensor device 18 by the wireless power supply device 20. Furthermore, the sensor device 18 and the remote wireless device 16 can perform wireless communication. Therefore, according to the present embodiment, no wiring is required to supply power to the sensor device 18, etc. Therefore, according to the present embodiment, breaks in such wiring cannot occur. Furthermore, since no such wiring is required, according to the present embodiment, the degree of freedom in arranging the sensor device 18, etc. can be improved. As described above, according to the present embodiment, a good wireless system 10 can be provided.

[0040] [Second embodiment] A wireless system according to the second embodiment will be described with reference to Fig. 4. Fig. 4 is a diagram showing the configuration of a wireless system according to this embodiment. Fig. 5 is a block diagram showing a wireless system according to this embodiment. The same components as those in the wireless system according to the first embodiment shown in Figs. 1 to 3 are given the same reference numerals, and their description will be omitted or simplified.

[0041] In this embodiment, not only can the sensor device 18 be wirelessly powered, but the remote wireless device 16 can also be wirelessly powered.

[0042] As shown in FIG. 5 , the remote radio device 16 may include a wireless power receiving unit 54. The wireless power receiving unit 54 may receive power supplied wirelessly from the wireless power supply device 20. The wireless power receiving unit 54 may receive power supplied wirelessly from the wireless power supply device 20. The wireless power receiving unit 54 receives power supplied from the wireless power supply device 20 via an antenna (not shown). The wireless power receiving unit 54 may include a rectifier circuit (not shown) and the like. The rectifier circuit (not shown) rectifies AC power received from the wireless power supply device 20 to generate DC power. The wireless power receiving unit 54 may supply DC power to each component of the remote radio device 16.

[0043] In the example shown in FIG. 5, the wireless power supply device 20 can wirelessly supply power to both the remote wireless device 16 and the sensor device 18.

[0044] The computer 12 and base radio 14 may be powered by wire.

[0045] In this way, the wireless system 10 according to this embodiment is configured.

[0046] As described above, according to this embodiment, power can be wirelessly supplied not only to the sensor device 18 but also to the remote radio device 16. According to this embodiment, power can be wirelessly supplied to the remote radio device 16, so that wiring for supplying power to the remote radio device 16 is not required. Therefore, according to this embodiment, disconnection of the wiring for supplying power to the remote radio device 16 is unlikely to occur. Furthermore, according to this embodiment, the degree of freedom in arranging the remote radio device 16 can be improved. As described above, according to this embodiment, a better wireless system 10 can be provided.

[0047] [Third embodiment] A wireless system according to the third embodiment will be described with reference to Figures 6 and 7. Figure 6 is a diagram showing the configuration of a wireless system according to this embodiment. The same components as those in the wireless system according to the first or second embodiment shown in Figures 1 to 5 are given the same reference numerals, and their description will be omitted or simplified.

[0048] In this embodiment, wireless power feeding to the remote wireless device 16 can be performed by a wireless power feeding device 20B that is separate from the wireless power feeding device 20A that feeds wireless power to the sensor device 18.

[0049] 6, the wireless system 10 may include a wireless power supply device 20A and a wireless power supply device 20B. The wireless power supply device 20A may wirelessly supply power to a sensor device 18. The wireless power supply device 20B may wirelessly supply power to a remote wireless device 16. When describing the individual wireless power supply devices without distinguishing them, the symbol 20 is used, and when describing the individual wireless power supply devices with distinction, the symbols 20A and 20B are used.

[0050] 7 is a diagram showing a part of a wireless system according to this embodiment, and shows an example of antenna connections.

[0051] As shown in Fig. 7, the wireless power supply device 20A may be provided with an antenna 74A. The wireless power supply device 20B may be provided with an antenna 74B. The antennas 74A and 74B are used for wireless power supply. When describing the individual antennas without distinguishing them, the reference numeral 74 is used, and when describing the individual antennas with distinction, the reference numerals 74A and 74B are used. As shown in Fig. 7, separate antennas 74A and 74B may be provided in each of the wireless power supply devices 20A and 20B.

[0052] In this way, wireless power feeding to the remote wireless device 16 may be performed by a wireless power feeding device 20B that is separate from the wireless power feeding device 20A that feeds wireless power to the sensor device 18.

[0053] [Fourth embodiment] A wireless system according to the fourth embodiment will be described with reference to Fig. 8. Fig. 8 is a diagram showing a part of the wireless system according to this embodiment. An example of antenna connections is shown in Fig. 8. The same components as those in the wireless systems according to the first to third embodiments shown in Figs. 1 to 7 are given the same reference numerals, and their description will be omitted or simplified.

[0054] 8 , in this embodiment, a plurality of antennas 74 are connected to the wireless power supply device 20. The wireless power supply device 20 can supply power wirelessly via the plurality of antennas 74. For example, one of the plurality of antennas 74 is used to supply power wirelessly to the sensor device 18, and the other of the plurality of antennas 74 is used to supply power wirelessly to the remote wireless device 16, but this is not limitative. Furthermore, three or more antennas 74 may be connected to the wireless power supply device 20.

[0055] In this way, multiple antennas 74 may be connected to the wireless power supply device 20.

[0056] [Fifth embodiment] A wireless system according to the fifth embodiment will be described with reference to Fig. 9. Fig. 9 is a diagram showing the configuration of the wireless system according to this embodiment. The same components as those in the wireless systems according to the first to fourth embodiments shown in Figs. 1 to 8 are given the same reference numerals, and their description will be omitted or simplified.

[0057] In this embodiment, wireless communication can occur between the base radio device 14B and the sensor device 18B without going through the remote radio device 16.

[0058] As shown in Fig. 9, in network 22A, wireless communication can be performed between base radio device 14A and remote radio device 16. Also, in network 22A, wireless communication can be performed between remote radio device 16 and sensor device 18A. When describing the individual base radio devices without distinction, reference numeral 14 is used, and when describing the individual base radio devices with distinction, reference numerals 14A and 14B are used. When describing the individual sensor devices without distinction, reference numeral 18 is used, and when describing the individual sensor devices with distinction, reference numerals 18A and 18B are used.

[0059] In network 22B, wireless communication can occur between base radio device 14B and sensor device 18B without going through remote radio device 16.

[0060] The wireless power supply device 20C can wirelessly supply power to the sensor device 18 constituting the network 22A. The wireless power supply device 20C may not only wirelessly supply power to the sensor device 18A constituting the network 22A, but also wirelessly supply power to the remote wireless device 16 constituting the network 22A. Furthermore, wireless power supply device (not shown) separate from the wireless power supply device 20C may wirelessly supply power to the remote wireless device 16 constituting the network 22A.

[0061] The wireless power supply device 20D can wirelessly supply power to the sensor device 18B that constitutes the network 22B.

[0062] As described above, according to this embodiment, in the network 22B, wireless communication can be performed between the base radio device 14B and the sensor device 18B without going through the remote radio device 16. According to this embodiment, since wireless communication can be performed between the base radio device 14B and the sensor device 18B without going through the remote radio device 16, the network 22B does not require the remote radio device 16. Therefore, according to this embodiment, it is possible to reduce the cost of the wireless system 10, etc.

[0063] The invention that can be understood from the above-described embodiments will be described below.

[0064] The wireless system (10) includes a base wireless device (14), a remote wireless device (16) that wirelessly communicates with the base wireless device, a sensor device (18) that wirelessly transmits signals to the remote wireless device, and a wireless power supply device (20) that wirelessly supplies power to at least the sensor device. This configuration eliminates the need for wiring to supply power to the sensor device. Therefore, this configuration prevents breaks in the wiring. Furthermore, because this configuration eliminates the need for wiring, this configuration improves the flexibility of the placement of the sensor device, etc. This configuration provides a good wireless system.

[0065] In the above wireless system, the remote wireless device may be wirelessly powered by the wireless power supply device. With this configuration, power can be wirelessly supplied to the remote wireless device, eliminating the need for wiring to supply power to the remote wireless device. Therefore, with this configuration, disconnection of the wiring for supplying power to the remote wireless device is unlikely to occur. Furthermore, with this configuration, the degree of freedom in arranging the remote wireless device can be improved. With this configuration, a better wireless system can be provided.

[0066] The wireless system may further include another wireless power supply device (20B) that wirelessly supplies power to the remote wireless device.

[0067] In the wireless system, the frequency of an electromagnetic wave used in the wireless power feeding performed by the wireless power feeding device may be the same as the frequency of an electromagnetic wave used in the wireless power feeding performed by the other wireless power feeding device.

[0068] In the wireless system, a frequency of an electromagnetic wave used in the wireless power feeding performed by the wireless power feeding device may be different from a frequency of an electromagnetic wave used in the wireless power feeding performed by the other wireless power feeding device.

[0069] In the wireless system, the wireless power supply device may perform the wireless power supply using a plurality of antennas (74).

[0070] In the wireless system described above, a plurality of base radio devices may be provided, and the system may further include a computer (12) connected to the plurality of base radio devices via a field bus (21), and at least one base radio device (14B) of the plurality of base radio devices may wirelessly receive a signal transmitted from another sensor device (18B) without passing through a remote radio device, and the other sensor device may be wirelessly powered by another wireless power supply device (20D). With this configuration, the signal transmitted from the other sensor device can be wirelessly received by the base radio device without passing through a remote radio device, which may contribute to cost reduction.

[0071] In the wireless system described above, the sensor device may detect the state of the actuator 72. Since wiring between the sensor device that detects the state of the actuator and the remote wireless device is not required, the risk of failure due to disconnection can be significantly reduced.

[0072] In the wireless system, the actuator may be provided in the production facility 70. Such a configuration can contribute to improving productivity.

[0073] In the wireless system, a plurality of the sensor devices may be provided for one of the actuators.

[0074] In the wireless system, one of the remote wireless devices may wirelessly receive signals transmitted from each of the plurality of sensor devices.

[0075] In the above wireless system, one of the base wireless devices may perform wireless communication with a plurality of the remote wireless devices.

[0076] In the above wireless system, a protocol for wireless communication between the base wireless device and the remote wireless device may be different from a protocol for wireless communication between the remote wireless device and the sensor device.

[0077] In the above wireless system, the frequency band used in the wireless communication between the base wireless device and the remote wireless device may be different from the frequency band used in the wireless communication between the remote wireless device and the sensor device.

[0078] The wireless system (10) includes a computer (12), a first base radio device (14A) connected to the computer by a field bus (21), a first remote radio device (16) that wirelessly communicates with the first base radio device, a first sensor device (18A) that transmits a signal to the first remote radio device, a second base radio device (14B) connected to the computer by the field bus, a second sensor device (18B) that wirelessly transmits a signal to the second base radio device, a wireless power supply device (20C) that wirelessly supplies power to at least the first sensor device, and another wireless power supply device (20D) that wirelessly supplies power to the second sensor device. With this configuration, a signal transmitted from the second sensor device can be wirelessly received by the second base radio device without passing through a remote radio device, which can contribute to reducing the cost of the wireless system. [Explanation of symbols]

[0079] 10: Radio system 12: Computer 14, 14A, 14B: Base radio device 16: Remote radio device 18, 18A, 18B: Sensor device 20, 20A to 20D: Wireless power supply device 21: Fieldbus 22, 22A, 22B: Network 24, 32, 44, 56: Arithmetic section 26, 34, 46, 58: Storage section 28, 40: Input / output interface 30, 36, 48, 62: Control unit 38, 50, 64: Transmission and reception processing section 42, 52A, 52B, 66: Communication section 54, 68: Wireless power receiving unit 60: Sensor element 70: Production equipment 72: Actuator 74, 74A, 74B: Antenna

Claims

1. a first base radio device; a first sensor device that wirelessly communicates with the first base radio device; a first wireless power supply device that wirelessly supplies power to the first sensor device using microwaves; Equipped with a pre-paired wireless communication link is established between the first base wireless device and the first sensor device; the first sensor device outputs a signal corresponding to a stroke position of the actuator; A wireless system, wherein the sensor element provided in the first sensor device includes a magnetic sensor.

2. 2. The wireless system according to claim 1, a computer connected to the first base radio device by a fieldbus; a second base radio device connected to the computer by the field bus; a remote radio device that wirelessly communicates with the second base radio device; a second sensor device that wirelessly communicates with the remote wireless device; a second wireless power supply device that wirelessly supplies power to the second sensor device using microwaves; Further provided with A wireless system, wherein pre-paired wireless communication links are established between the second base wireless device and the remote wireless device, and between the remote wireless device and the second sensor device.

3. 3. The wireless system according to claim 2, A wireless system, wherein the remote wireless device is wirelessly powered by the second wireless power supply device.

4. 3. The wireless system according to claim 2, The wireless system further comprises a third wireless power supply device that wirelessly supplies power to the remote wireless device.

5. 5. The wireless system according to claim 4, a frequency of a microwave used for wireless power supply from the second wireless power supply device to the second sensor device and a frequency of a microwave used for wireless power supply from the third wireless power supply device to the remote wireless device are different from each other.

6. In the wireless system according to any one of claims 2 to 5, The remote wireless device wirelessly receives signals transmitted from each of the plurality of second sensor devices.

7. In the wireless system according to any one of claims 2 to 6, The second base radio device communicates wirelessly with a plurality of the remote radio devices.

8. The wireless system according to any one of claims 2 to 7, A wireless system in which a protocol for wireless communication between the second base wireless device and the remote wireless device is different from a protocol for wireless communication between the remote wireless device and the second sensor device.

9. In the wireless system according to any one of claims 2 to 8, A wireless system in which the frequency band used in wireless communication between the second base wireless device and the remote wireless device is different from the frequency band used in wireless communication between the remote wireless device and the second sensor device.

10. The wireless system according to any one of claims 1 to 9, A wireless system, wherein the first wireless power supply device performs the wireless power supply using a plurality of antennas.

11. The wireless system according to any one of claims 1 to 10, The actuator is installed in a production facility.

12. The wireless system according to any one of claims 1 to 11, A wireless system in which a plurality of the first sensor devices are provided for one of the actuators.

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