Power supply system

Abstract

To provide a power supply system that allows for wireless power transfer to the inside of a chassis, offering greater flexibility in placement within the chassis than conventional systems. [Solution] The power supply system of the embodiment comprises a housing, a transmitting antenna, and a receiving antenna. The housing has the transmitting antenna and the receiving antenna inside. The transmitting antenna is an antenna that transmits a first electromagnetic wave for wireless power supply. The receiving antenna is an antenna that receives the first electromagnetic wave. At least one of the transmitting antenna and the receiving antenna may be omnidirectional.

Description

Technical Field

[0001] The present invention relates to a power supply system.

Background Art

[0002] Electronic devices such as various sensors may be used inside a housing of industrial machinery or the like. Such an electronic device operates, for example, by a battery. Therefore, battery replacement is required.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] If power is supplied to the electronic device by wireless power supply, battery replacement becomes unnecessary. However, when using wireless power supply, it is necessary to arrange an antenna, an electronic device, etc. so that radio waves for wireless power supply can be efficiently transmitted and received.

[0005] The problem to be solved by the embodiment of the present invention is to provide a power supply system that performs wireless power supply into a housing, with a higher degree of freedom in arrangement inside the housing than in the prior art.

Means for Solving the Problems

[0006] The power supply system of the embodiment includes a housing, a power transmission antenna, and a power reception antenna. The housing has the power transmission antenna and the power reception antenna inside. The power transmission antenna is an antenna that emits a first electromagnetic wave for wireless power supply. The power reception antenna is an antenna that receives the first electromagnetic wave.

Brief Description of the Drawings

[0007] [Figure 1]A diagram showing an example of the control system according to the embodiment and the main components of the elements included in the control system. [Modes for carrying out the invention]

[0008] The control system according to the embodiment will be described below with reference to the drawings. Note that the scale of each part in the drawings used in the description of the embodiment below may have been changed as appropriate. Also, for illustrative purposes, some components may be omitted in the drawings used in the description of the embodiment below. Furthermore, in the drawings and this specification, the same reference numerals indicate the same elements.

[0009] Figure 1 shows an example of the main components of a control system 1 and its constituent elements according to an embodiment. The control system 1 is a system that performs wireless power supply using a receiving antenna 310 and a transmitting antenna 400 located inside a housing 110. The control system 1 includes, as an example, an industrial machine 100, a numerical control device 200, an electronic device 300, a transmitting antenna 400, a transmitter 500, and a receiver 600. The control system 1 may include only a part of these components. The control system is an example of a power supply system.

[0010] Industrial machine 100 is a machine that operates by numerical control or the like. Industrial machine 100 is, for example, a machine tool, a machining center, an industrial robot, or other industrial machine. A machine tool, for example, performs predetermined machining based on an operation command. Industrial machine 100 includes, as an example, a housing 110, a control unit 120, and a machining unit 130.

[0011] The housing 110 is, for example, a box-shaped part that houses various parts of the industrial machine 100. If the industrial machine 100 is a machine tool, these parts are, for example, a control unit 120 and a processing unit 130. However, parts of the industrial machine 100 may be outside the housing 110. The housing 110 also houses an electronic device 300, a power transmission antenna 400, a power transmitter 500, and a receiver 600. In Figure 1, one of each of the electronic device 300, power transmission antenna 400, power transmitter 500, and receiver 600 is shown inside the housing 110, but the number of each is not limited. The housing 110 preferably has few holes and gaps to prevent leakage of internal electromagnetic waves, and more preferably has no holes and gaps. However, the housing 110 may have openings that can be opened and closed. The housing 110 includes, as an example, a base 111. The housing 110 also preferably includes an electromagnetic wave absorbing layer 112 and an electromagnetic wave reflecting layer 113. The base 111, the electromagnetic wave absorbing layer 112, and the electromagnetic wave reflecting layer 113 are stacked in the order of electromagnetic wave absorbing layer 112, base 111, and electromagnetic wave reflecting layer 113 from the outside of the housing 110. The housing 110 is an example of a housing that has a power transmitting antenna and a power receiving antenna inside.

[0012] The base 111 is, for example, a rigid part that forms the housing 110. The base 111 is an example of a housing that has a transmitting antenna and a receiving antenna inside.

[0013] The electromagnetic wave absorbing layer 112 is laminated on the outside of the base 111. The electromagnetic wave absorbing layer 112 is formed using, for example, a radio wave absorbing material that readily absorbs electromagnetic waves. The electromagnetic wave absorbing layer 112 is, for example, attached to or coated onto the base 111. Alternatively, the electromagnetic wave absorbing layer 112 may be formed in a shape that readily absorbs radio waves. In this case, the electromagnetic wave absorbing layer 112 and the base 111 may be integrated. The electromagnetic wave absorbing layer 112 absorbs electromagnetic waves that leak from the electromagnetic wave reflecting layer 113 and the base 111, thereby suppressing the leakage of electromagnetic waves to the outside of the housing 110. Note that the electromagnetic wave absorbing layer 112 is an example of an absorbing part that is provided on the outside of the housing and absorbs electromagnetic waves.

[0014] The electromagnetic wave reflective layer 113 is laminated on the inside of the base 111. The electromagnetic wave reflective layer 113 is formed using, for example, a radio wave reflective material that easily reflects electromagnetic waves. The electromagnetic wave reflective layer 113 is, for example, attached to or coated on the base 111. Alternatively, the electromagnetic wave reflective layer 113 may be formed in a shape that easily reflects radio waves. In this case, the electromagnetic wave reflective layer 113 and the base 111 may be integrated. The electromagnetic wave reflective layer 113 reflects electromagnetic waves inside the housing 110. The base 111 may also be formed of a radio wave reflective material. In this case, the housing 110 does not need to have the electromagnetic wave reflective layer 113. The electromagnetic wave reflective layer 113 is an example of a reflective part that is provided on the inside of the housing and reflects electromagnetic waves.

[0015] The control unit 120 is a computer that performs calculations and control processes necessary for the operation of the industrial machine 100. The control unit 120 controls the industrial machine 100 based on instructions from the numerical control device 200. The control unit 120 can acquire information such as measured values ​​or signals obtained from the electronic device 300 via the receiver 600. The control unit 120 can use the acquired information to control the industrial machine 100. The control unit 120 can also control the power transmitter 500.

[0016] The machining section 130 includes tools, motors, spindles, feed axes, and jigs for machining workpieces and the like.

[0017] The numerical control device 200 is a device that performs numerical control on industrial machinery 100 and the like. The numerical control device 200 controls industrial machinery 100 and the like according to a processing program. The numerical control device 200 can be realized, for example, by having a computer device having a processor such as a CPU (central processing unit), a memory device, an input / output interface, etc., execute an appropriate control program.

[0018] Furthermore, the numerical control device 200 can also perform numerical control and other forms of control on the power transmitter 500. The control unit 120 or the numerical control device 200 controls the power transmitter 500. Through this control, the control unit 120 or the numerical control device 200 can switch the power of the power transmitter 500 on and off. For example, the control unit 120 or the numerical control device 200 starts supplying power from the power transmitter 500 to the electronic device 300 by turning on the power of the power transmitter 500 at the same time as the industrial machine 100 is started up. Furthermore, the numerical control device 200 can also perform numerical control and other forms of control on the receiver 600. Through this control, the numerical control device 200 can switch the power of the receiver 600 on and off.

[0019] Furthermore, the numerical control device 200 can acquire information such as measured values ​​or signals from the electronic device 300 via the receiver 600. The numerical control device 200 can then perform numerical control using the acquired information.

[0020] The electronic device 300 is a wireless communication device. The electronic device 300 can communicate with the receiver 600 via the first communication antenna 330. The electronic device 300 can also communicate with the control unit 120 and the numerical control device 200 via the first communication antenna 330 and the receiver 600. The electronic device 300 is, for example, a touch probe, a touch switch, a tool length measuring sensor, a temperature sensor, a position sensor, a general-purpose sensor, or other sensor. The electronic device 300 may be a device other than a sensor. The position of the electronic device 300 is not fixed within the housing 110. The electronic device 300 includes, as an example, a power receiving antenna 310, a power receiver 320, a first communication antenna 330, a first communication unit 340, a signal processing unit 380, a remaining charge detection unit 360, a battery 370, and a switch mechanism 350.

[0021] The power receiving antenna 310 is an antenna that receives the electromagnetic wave E1 for power transmission sent from the power transmitting antenna 400. The power receiving antenna 310 is preferably omnidirectional. The power receiving antenna 310 converts the received electromagnetic wave E1 into current (power) and outputs it. The electromagnetic wave E1 is preferably a radio wave. The radio wave is preferably a microwave. The frequency band of the microwave is, for example, the 920 MHz band, the 2.4 GHz band, or the 5.7 GHz band. The frequency is preferably different from the frequency of the electromagnetic wave E2 described later. Since the frequency of the electromagnetic wave E2 is preferably the 2.4 GHz band, the frequency of the electromagnetic wave E1 is preferably the 920 MHz band or the 5.7 GHz band. Also, the electromagnetic wave E1 is preferably a circularly polarized wave. However, the electromagnetic wave E1 may be a linearly polarized wave such as a horizontally polarized wave or a vertically polarized wave. The current output from the power receiving antenna 310 is input to the conversion unit 321 of the power receiver 320. The current is an alternating current.

[0022] Note that the electromagnetic wave E1 is an example of the first electromagnetic wave. Therefore, the power receiving antenna 310 is an example of a power receiving antenna that receives the first electromagnetic wave.

[0023] The power receiver 320 rectifies the current output from the power receiving antenna 310 and inputs it to the battery 370. The input. The power receiver 320 includes, as an example, a conversion unit 321 and a charging unit 322. Note that the electronic device 300 may be one in which the power supply of the existing electronic device 300 is replaced with the power receiving antenna 310, the power receiver 320, and the battery 370. Therefore, in the control system 1, the existing electronic device 300 can also be used.

[0024] The conversion unit 321 includes, for example, a rectifier circuit that rectifies the input alternating current and converts it into a direct current and outputs it. The conversion unit 321 may be a circuit that converts the frequency. Also, the conversion unit 321 may include a circuit that converts the voltage.

[0025] The charging unit 322 charges the battery 370 with the current (power) output from the conversion unit 321.

[0026] The first communication antenna 330 is an antenna that transmits and receives electromagnetic waves E2 for communication with the receiver 600. The first communication antenna 330 may be omnidirectional or directional. The first communication antenna 330 converts the received electromagnetic waves E2 into an electric current and inputs it to the first communication unit 340. The first communication antenna 330 also converts the electric current input from the first communication unit 340 into electromagnetic waves E2 and transmits it to the second communication antenna 610. Electromagnetic waves E2 are typically radio waves. The frequency band is preferably the 2.4 GHz band. Microwaves in the 2.4 GHz band are suitable for communication because they have more wave propagation than those in the 5.7 GHz band. It is also preferable that the frequency band of electromagnetic waves E2 is different from the frequency band of electromagnetic waves E1. This is because if the frequency bands of electromagnetic waves E1 and E2 are the same or close, it will affect communication between the electronic device 300 and the receiver 600. However, the frequency bands of electromagnetic wave E1 and electromagnetic wave E2 may be the same. In this case, time division is used to prevent them from affecting the communication. That is, the electronic device 300, the transmitter 500, and the receiver 600 cooperate to control the transmission of electromagnetic wave E2 and electromagnetic wave E1 so that they do not overlap.

[0027] The first communication unit 340 communicates with the receiver 600 by transmitting and receiving electromagnetic waves E2 using the first communication antenna 330. The first communication unit 340 transmits information by modulating a current and inputting it to the first communication antenna 330. The first communication unit 340 also acquires information by demodulating the current input from the first communication antenna 330. The electronic device 300 transmits information, including various measured values, on the electromagnetic waves E2 via the first communication unit 340 and the first communication antenna 330. The measured values ​​indicate values ​​measured by the electronic device 300, which is a sensor. This information may also include the remaining charge of the battery 370. The electronic device 300 also receives information transmitted from the receiver 600 on the electromagnetic waves E2 via the first communication unit 340 and the first communication antenna 330. This information includes, for example, control signals for the electronic device 300.

[0028] The switch mechanism 350 has an electrical contact mechanism and detects the timing when the switch mechanism comes into contact with the object. The switch mechanism 350 transmits the detection result to the signal processing unit 380.

[0029] The remaining charge detection unit 360 is a circuit that detects the remaining charge of the battery 370. The remaining charge detection unit 360 outputs a signal indicating the result of the detection to the signal processing unit 380.

[0030] Battery 370 is a secondary battery and power source that supplies power to various parts of the electronic device 300.

[0031] The signal processing unit 380 receives commands carried on electromagnetic waves E2 transmitted from the receiver 600 via the first communication antenna 330 and the first communication unit 340. When the signal processing unit 380 receives a command to start monitoring, it starts monitoring the contact state of the switch mechanism 350. When the signal processing unit 380 detects contact operation by the switch mechanism 350, it transmits electromagnetic waves E2 carrying the result of the detection to the receiver 600 via the first communication unit 340 and the first communication antenna 330. The signal processing unit 380 also monitors the remaining charge of the battery 370 using the remaining charge detection unit 360 and transmits electromagnetic waves E2 carrying the remaining charge to the receiver 600 via the first communication unit 340 and the first communication antenna 330.

[0032] The transmitting antenna 400 is an antenna that converts the current (power) input from the transmitter 500 into electromagnetic waves E1 and transmits them. The transmitting antenna 400 is preferably omnidirectional. The electromagnetic waves E1 are transmitted in various directions, for example, as shown in Figure 1 as electromagnetic waves E1-1, E1-3, and E1-4. Figure 1 shows electromagnetic waves E1-1 to E1-4 as examples of electromagnetic waves E1. A portion of the electromagnetic waves E1 are transmitted from the transmitting antenna 400, reflected once by the housing 110, and then received by the receiving antenna 310, for example, as shown in electromagnetic waves E1-1 and E1-2. Electromagnetic wave E1-1 represents the incident wave. Electromagnetic wave E1-2 represents the reflected wave. The incident wave E1-1 is reflected by the housing 110 to become the reflected wave E1-2. Furthermore, as shown in electromagnetic wave E1-3, a portion of electromagnetic wave E1 is received directly by the receiving antenna 310 without being reflected by the housing 110 or the like. Also, as shown in electromagnetic wave E1-4, a portion of electromagnetic wave E1 is transmitted in a direction that does not reach the receiving antenna 310 with one or fewer reflections. A portion of electromagnetic wave E1-4 is received by the receiving antenna 310 after being reflected two or more times by the housing 110 or the like.

[0033] The power transmission antenna 400 is preferably installed on the ceiling surface of the housing 110, and more preferably at the four corners of the ceiling surface. This is because emitting electromagnetic waves from the ceiling surface is thought to reduce leakage of electromagnetic waves outside the housing 110. Furthermore, emitting electromagnetic waves from the four corners of the ceiling surface is thought to further reduce leakage of electromagnetic waves outside the housing 110.

[0034] The power transmission antenna 400 is an example of a power transmission antenna that emits a first electromagnetic wave for wireless power transmission.

[0035] The power transmitter 500 outputs current to the power transmitting antenna 400 based on control by, for example, a numerical control device 200. The power transmitter 500 includes, as an example, a power transmission unit 510 and a power supply control unit 520.

[0036] The power transmission unit 510 outputs current to the power transmission antenna 400 according to the control of the power supply control unit 520. This control determines, for example, the power, energy amount, and transmission timing to be output by the power transmission unit 510.

[0037] Furthermore, at least one of the transmitter 500 and the receiver 600 may have a function to switch the frequency of electromagnetic wave E1. This is because the frequency of electromagnetic wave E1 that is most easily received varies depending on the environment. By switching the frequency, the transmitter 500 or the receiver 600 can switch to another frequency if transmission at a certain frequency is unsuccessful, thereby enabling smooth power supply. In addition, by switching the frequency, the transmitter 500 or the receiver 600 can select and supply power at the frequency with the best power supply efficiency. Here, power supply efficiency refers to the ratio of the energy of electromagnetic wave E1 received by the receiving antenna 310 to the energy of electromagnetic wave E1 transmitted by the transmitting antenna 400.

[0038] Furthermore, the electronic device 300 and the receiver 600 may have a function to switch the frequency of the electromagnetic wave E2.

[0039] The power supply control unit 520 performs processing such as calculations and control necessary for the operation of the power transmitter 500. The power supply control unit 520 is a computer, processor, or circuit that controls the power transmission unit 510 based on control by the numerical control device 200 or the operation control unit 630, etc.

[0040] Receiver 600 receives electromagnetic waves E2 transmitted from the first communication antenna 330 with the second communication antenna 610. Receiver 600 also transmits the information carried on the electromagnetic waves E2 to the numerical control device 200 and the like. Receiver 600 also transmits information carried on the electromagnetic waves E2 to the first communication antenna 330 based on the control of the numerical control device 200. The numerical control device 200 transmits control signals for controlling the electronic device 300 to the electronic device 300 via receiver 600, carried on the electromagnetic waves E2. The numerical control device 200 also receives information carried on the electromagnetic waves E2 transmitted from the electronic device 300 via receiver 600. Receiver 600 includes, as an example, a second communication antenna 610, a second communication unit 620, and an operation control unit 630.

[0041] The second communication antenna 610 is an antenna that transmits and receives electromagnetic waves E2 for communication with the electronic device 300. The second communication antenna 610 may be omnidirectional or directional. The second communication antenna 610 converts the received electromagnetic waves E2 into an electric current and inputs it to the second communication unit 620. The second communication antenna 610 also converts the electric current input from the second communication unit 620 into electromagnetic waves E2 and transmits it to the second communication antenna 610.

[0042] The second communication unit 620 communicates with the electronic device 300 by transmitting and receiving electromagnetic waves E2 using the second communication antenna 610. The second communication unit 620 transmits information by modulating an electric current and inputting it to the second communication antenna 610. The second communication unit 620 also acquires information by demodulating the electric current input from the second communication antenna 610.

[0043] Note that electromagnetic wave E2 is an example of a second electromagnetic wave. Furthermore, the combination of the first communication antenna 330 and the second communication antenna 610 enables wireless communication between the electronic device and the receiver 600. Therefore, the combination of the first communication antenna 330 and the second communication antenna 610 is an example of a wireless communication unit that performs wireless communication between the electronic device and the receiver using a second electromagnetic wave. Note that this wireless communication unit may also include a first communication unit 340 and a second communication unit 620.

[0044] The operation control unit 630 is, for example, a computer, processor, or circuit that performs calculations and control necessary for the operation of the receiver 600. The operation control unit 630 controls the second communication unit based on instructions from the numerical control unit 200. The operation control unit 630 may also control the power supply control unit 520.

[0045] The control system 1 of this embodiment comprises a receiving antenna 310, a transmitting antenna 400, and a housing 110 that houses these internally. In the control system 1 of this embodiment, because the receiving antenna 310 and the transmitting antenna 400 are located inside the housing 110, at least a portion of the electromagnetic waves for wireless power transmission emitted from the transmitting antenna 400 are reflected by the housing 110 and reach the receiving antenna 310. As a result, the control system 1 of this embodiment can increase the power transmission efficiency compared to conventional systems. Furthermore, the control system 1 of this embodiment can suppress the decrease in power transmission efficiency when the antenna orientation is shifted compared to conventional systems. In addition, since the control system 1 of this embodiment also uses reflected waves, electromagnetic waves can easily reach the receiving antenna 310. Therefore, the control system 1 of this embodiment offers a high degree of freedom in the installation position of the receiving antenna 310 and the transmitting antenna 400. Furthermore, since the control system 1 of this embodiment uses reflected waves, it offers a high degree of freedom in the installation position of the receiving antenna 310 and the transmitting antenna 400. Furthermore, in the control system 1 of this embodiment, since reflected waves are used, components other than the receiving antenna 310 and the transmitting antenna 400 do not need to be as concerned with shielding electromagnetic waves as in conventional systems, thus offering greater flexibility in installation location.

[0046] Furthermore, in the control system 1 of this embodiment, at least one of the receiving antenna 310 and the transmitting antenna 400 is omnidirectional. When the receiving antenna 310 is omnidirectional, it is easier to receive electromagnetic waves reflected by the housing 110. Therefore, an omnidirectional receiving antenna 310 can improve the power supply efficiency when there are many electromagnetic waves that are emitted from the transmitting antenna 400 and do not directly reach the receiving antenna 310. Also, when the transmitting antenna 400 is omnidirectional, at least a portion of the electromagnetic waves emitted by the transmitting antenna 400 are reflected by the housing 110 and reach the receiving antenna 310. Therefore, the control system 1 of this embodiment is capable of wireless power supply using an omnidirectional transmitting antenna 400. In addition, by using an omnidirectional antenna, the control system 1 of this embodiment can suppress the decrease in power supply efficiency when the direction of the antenna is shifted. Also, omnidirectional antennas are often less expensive because their design is simpler than that of directional antennas. Therefore, the control system 1 of this embodiment can reduce costs compared to conventional systems.

[0047] Furthermore, in the control system 1 of this embodiment, the receiving antenna 310 and the transmitting antenna 400 are omnidirectional. When the transmitting antenna 400 is omnidirectional, a larger proportion of the electromagnetic waves transmitted by the transmitting antenna 400 are reflected by the housing 110 and reach the receiving antenna 310 compared to when the transmitting antenna 400 is directional. By having the receiving antenna 310 also be omnidirectional, these reflected waves can be received efficiently. In addition, when transmitting and receiving electromagnetic waves with a directional antenna, it is necessary to set the direction of the antenna. If both the receiving antenna 310 and the transmitting antenna 400 are omnidirectional, this hassle is unnecessary. Moreover, because both the receiving antenna 310 and the transmitting antenna 400 of this embodiment are omnidirectional, the control system 1 can reduce costs compared to when only one of them is omnidirectional.

[0048] Furthermore, the control system 1 of this embodiment has an electromagnetic wave absorbing layer 112 on the outside of the housing 110. As a result, the control system 1 of this embodiment can reduce electromagnetic wave leakage, thereby reducing the impact of the housing 110 on the human body and other objects.

[0049] Furthermore, the control system 1 of this embodiment has an electromagnetic wave reflection layer 113 inside the housing 110. As a result, the control system 1 of this embodiment reduces the attenuation of electromagnetic waves E1 during reflection. Therefore, the power supply efficiency of the control system 1 of this embodiment is increased.

[0050] Furthermore, the housing 110 of the control system 1 in this embodiment is the housing of an industrial machine. The power transmission in this embodiment is particularly suitable for use in industrial machines having a housing, because the wireless power transfer of this embodiment can be applied with few design changes or modifications.

[0051] Furthermore, the control system 1 of this embodiment transmits power using microwaves. In the power transmission of this embodiment, microwaves are considered preferable from the viewpoint of power supply efficiency.

[0052] Furthermore, the control system 1 of this embodiment includes an electronic device 300 that operates on power converted from electromagnetic waves E1 received by the receiving antenna 310. The electronic device 300 is also capable of wireless communication. Since the electronic device 300 operates by wireless power supply in this embodiment and can be controlled and information acquired via wireless communication, it offers a high degree of flexibility in its installation location. In addition, many conventional electronic devices 300 operate on power supplies using batteries. In the control system 1 of this embodiment, since it is wirelessly powered, battery replacement is unnecessary. Therefore, the installation location of the electronic device 300 offers a high degree of flexibility.

[0053] Furthermore, the control system 1 of this embodiment includes multiple power receiving antennas 310. In the control system 1 of this embodiment, electromagnetic waves E1 are reflected inside the housing 110 and reach many locations inside the housing 110, so that multiple power receiving antennas 310 can be supplied with power simultaneously.

[0054] Furthermore, the control system 1 of this embodiment includes a plurality of electronic devices 300. Therefore, if the electronic devices 300 are, for example, sensors, the control system 1 of this embodiment can utilize multiple sensors.

[0055] Furthermore, according to the control system 1 of this embodiment, the electronic device 300 is a sensor. This allows the control system 1 of this embodiment to measure various conditions within the housing 110, such as the status of the industrial machine 100. The numerical control device 200 can then perform control based on these measurements. In addition, sensors for machine tools may be stored in an ATC (automatic tool changer), etc. The control system 1 of this embodiment can supply power even in such cases.

[0056] Furthermore, the electronic device 300 in the control system 1 of this embodiment may be an existing electronic device 300 with its power supply replaced by a receiving antenna 310 and a power receiver 320. Also, the power transmitter 500 in the control system 1 of this embodiment may be an existing industrial machine 100 that has been added later. Therefore, according to the control system 1 of this embodiment, the wireless power supply function of this embodiment can be easily used using existing electronic devices 300 and existing industrial machine 100.

[0057] The above embodiment can also be modified as follows:

[0058] In the above embodiment, the electronic device 300, the transmitter 500, and the receiver 600 are located inside the housing 110. However, all or part of the electronic device 300, excluding the receiving antenna 310, may be located outside the housing 110. Similarly, all or part of the transmitter 500 may be located outside the housing 110. Similarly, all or part of the receiver 600 may be located outside the housing 110. However, it is preferable that the first communication antenna 330 and the second communication antenna 610 are located inside the housing 110. Furthermore, if the first communication antenna 330 and the second communication antenna 610 are located outside the housing 110, it is preferable that both the first communication antenna 330 and the second communication antenna 610 are located outside the housing 110.

[0059] The numerical control device 200 may be a component of the industrial machine 100. Alternatively, the numerical control device 200 may be located inside the housing 110.

[0060] At least one of the electronic device 300, the power transmission antenna 400, the power transmitter 500, and the receiver 600 may be a component of the industrial machine 100.

[0061] At least one of the receiving antenna 310 and the transmitting antenna 400 may be a directional antenna instead of an omnidirectional antenna. Even if a directional antenna is used as at least one of the receiving antenna 310 and the transmitting antenna 400, it is thought that the electromagnetic wave E1 will reach the transmitting antenna 400 more easily due to reflection of the electromagnetic wave E1 by the housing 110. Therefore, the degree of freedom in the arrangement within the housing is higher than in the conventional design.

[0062] Each device in the embodiment may consist of multiple devices. The numerical control device 200 may be implemented using cloud computing.

[0063] The embodiments of the present invention have been described above, but these are merely examples and do not limit the scope of the invention. Embodiments of the present invention can be implemented in various ways without departing from the spirit of the invention. [Explanation of Symbols]

[0064] 1. Control System 100 Industrial Machinery 110 cabinets 111 Base 112 Electromagnetic wave absorption layer 113 Electromagnetic wave reflective layer 120 Control Unit 130 Processing Department 200 Numerical control device 300 Electronic Devices 310 Receiving Antenna 320 Power receiver 321 Conversion Unit 322 Live parts 330 First Communications Antenna 340 First Communications Department 350 Switch mechanism 360 Remaining amount detection unit 370 Battery 380 Signal Processing Unit 400 Power transmission antenna 500 Power Transmitters 510 Power Transmission Section 520 Power supply control unit 600 Receiver 610 Second communications antenna 620 Second Communications Department 630 Operation Control Unit

Claims

1. A housing having a transmitting antenna and a receiving antenna inside, The power transmission antenna emits a first electromagnetic wave for wireless power transmission, A power supply system comprising a receiving antenna that receives the first electromagnetic wave.

2. The power supply system according to claim 1, wherein at least one of the transmitting antenna and the receiving antenna is omnidirectional.

3. The aforementioned power transmission antenna is omnidirectional, The power supply system according to claim 1, wherein the power receiving antenna is omnidirectional.

4. The power supply system according to claim 1, further comprising an absorbing part provided on the outside of the housing for absorbing electromagnetic waves.

5. The power supply system according to claim 1, further comprising a reflective part provided inside the housing that reflects electromagnetic waves.

6. The power supply system according to claim 1, wherein the housing is the housing of an industrial machine.

7. The power supply system according to claim 1, wherein the first electromagnetic wave is a microwave.

8. An electronic device that operates using power converted from the first electromagnetic wave received by the receiving antenna, The power supply system according to claim 1, further comprising a wireless communication unit that performs wireless communication between the electronic device and the receiver using a second electromagnetic wave.

9. The power supply system according to claim 8, wherein the electronic device is a sensor.

10. The power supply system according to claim 1, comprising a plurality of the aforementioned power receiving antennas.

Images