JP7282063B2 - detection system - Google Patents

Description

The present invention relates to sensing systems .

As an invention for inspecting water intrusion into a closure that protects a connecting portion of a cable, there is a communication cable closure disclosed in Patent Document 1, for example. This communication cable closure has a cylindrical shape formed by tightening two half-sleeves with a band, and transparent end plates for holding an optical cable are arranged at both ends of the cylindrical shape. According to the communication cable closure disclosed in Patent Document 1, since the end plate is transparent, it is possible to visually confirm water that has entered inside. Note that the closure may also be called a terminal box or junction box.

Japanese Patent No. 6274895

By measuring the environment of the closure with a sensor, it is possible to grasp the state of the closure. However, if the sensor is provided inside the sealed closure, it cannot grasp the environment outside the closure, and if the sensor is provided outside the closure, it will not be possible to grasp the environment inside the closure. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object of the present invention is to easily detect the states inside and outside the closed space.

In order to solve the above-described problems and achieve the object, a detection system according to one aspect of the present invention includes a housing that forms a closed space, an article stored in the closed space, and an article that is placed in the closed space. and a detection device disposed outside the closed space, wherein the sensor module includes a power receiving unit that wirelessly receives power supplied from the detection device; a detection unit that detects the state of the environment in the closed space from the power wirelessly received by the unit; and a transmission unit that wirelessly transmits information indicating the detection result of the detection unit to the detection device, wherein the detection device is A power supply unit that wirelessly supplies power to the sensor module, a sensor that detects the state of the environment outside the closed space, a reception unit that wirelessly receives the information, and a process based on the information received by the reception unit. and a processing unit for predicting the state of the housing or the article based on the state detected by the sensor and the state indicated by the information received by the receiving unit.

A detection system according to an aspect of the present invention is characterized in that the closed space is a space inside a sealed housing.

A detection system according to an aspect of the present invention is characterized in that the housing is a closure that accommodates a connecting portion of a cable.

A detection system according to an aspect of the present invention is characterized in that the detection device determines the presence or absence of water in the closed space according to the information.

In the detection system according to an aspect of the present invention, the sensor detects at least one of the temperature, humidity, atmospheric pressure, or vibration of the surrounding environment, and the sensor module detects at least the temperature, humidity, atmospheric pressure, or vibration of the closed space. Information indicating any of the vibrations is transmitted to the detection device, and the detection device receives the information.

In the detection system according to one aspect of the present invention, the sensor module includes a sensor that detects the state of the environment of the closed space, and the transmitter transmits information indicating the state detected by the sensor. , the sensor and the transmitter are operated by power supply from the detection device.

A detection system according to an aspect of the present invention is characterized in that the detection device includes a battery, and electric power from the battery is used to supply power to the sensor module and to drive a sensor included in the detection device.

In the detection system according to an aspect of the present invention, the sensor provided in the detection device detects at least one of the temperature, humidity, presence or absence of water, air pressure, or vibration of the surrounding environment, and the sensor provided in the detection device detects the A prediction unit that compares the state of the surrounding environment detected by the detection device with the information received by the detection device, and predicts the progress of deterioration of the housing that constitutes the closed space based on the result of the comparison. characterized by

A detection system according to an aspect of the present invention is characterized in that the method of wireless power supply is an electric field resonance method.

In the detection system according to an aspect of the present invention, the sensor module includes a first module that is waterproof and can respond to the detection device when it is submerged and when it is not submerged, and a first module that is non-waterproof and can respond to the detection device when it is not submerged. and a second module that cannot respond to the detection device when flooded, and the detection device responds to information transmitted from the first module and information transmitted from the second module, The presence or absence of water in the closed space is determined.

A detection system according to an aspect of the present invention is characterized in that the sensor of the detection device is waterproof.

In the detection system according to an aspect of the present invention, the detection device transmits the state of the surrounding environment detected by the sensor included in the detection device and the state of the environment in the closed space detected by the sensor module to a data server. It is characterized by comprising communication means for notifying.

A detection device according to an aspect of the present invention includes a power supply unit that wirelessly supplies power to a sensor module arranged in a closed space, a sensor that detects the state of an environment outside the closed space, and a receiving unit that wirelessly receives information indicating a detection result of the environment state of the closed space; and a processing unit that performs processing based on the information received by the receiving unit, wherein the processing unit detects the sensor. The state of the housing forming the closed space or the state of the article stored in the closed space is predicted based on the state indicated by the received state and the state indicated by the information received by the receiving unit.

ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that the state in a closed space and outside a closed space can be detected easily.

FIG. 1 is a diagram showing the configuration of a detection system according to an embodiment. FIG. 2 is a block diagram showing the configuration of the sensor module and detection device. FIG. 3 is a diagram for explaining an arrangement example of electrodes included in the first coupling portion. FIG. 4 is a diagram for explaining an arrangement example of electrodes included in the first coupling portion. FIG. 5 is a diagram showing a configuration related to electric field resonance coupling. FIG. 6 is a flow chart showing the flow of processing in the detection system. FIG. 7 is a flow chart showing the flow of processing performed by the server device 2 .

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by embodiment described below. Moreover, in the description of the drawings, the same or corresponding elements are given the same reference numerals as appropriate. Furthermore, it should be noted that the drawings are schematic, and the dimensional relationship of each element may differ from the actual one. Even between the drawings, there are cases where portions with different dimensional relationships and ratios are included.

FIG. 1 is a diagram showing the configuration of a detection system 1 according to an embodiment of the invention. The sensing system 1 includes a sensor module 10 and a sensing device 20 . The detection system 1 is a system that detects the surrounding state of the connecting portion of the optical fiber cable 61A and the optical fiber cable 61B and the surrounding state of the detection device 20 . Note that the detection system 1 may also include the server device 2 to be described later.

The optical fiber cables 61A and 61B are cables in which a plurality of optical fiber core wires are bundled. The optical fiber cables 61A, 61B are an example of articles. The optical fiber core wire of the optical fiber cable 61A and the optical fiber core wire of the optical fiber cable 61B are fusion-spliced, respectively, and the fusion-spliced portions are accommodated in the splicing portion 50 .

The connecting portion 50 is made of, for example, synthetic resin having water resistance and weather resistance. The splicing part 50 accommodates the fusion-spliced portion of the optical fiber core wire of the optical fiber cable 61A and the optical fiber core wire of the optical fiber cable 61B, and protects the spliced portion. The connecting portion 50 is housed in the closure 40 .

The closure 40 has a sleeve 41 and end plates 42A, 42B. Closure 40 is an example of a housing. The sleeve 41 and the end plates 42A and 42B are made of, for example, synthetic resin having water resistance and weather resistance. The end plate 42A is provided with a hole through which the optical fiber cable 61A passes, and the end plate 42B is provided with a hole through which the optical fiber cable 61B passes. Note that the end plates 42A and 42B do not have to be made of the same material as the sleeve 41 . The sleeve 41 has a cylindrical shape, one longitudinal end of which is closed by an end plate 42A, and one longitudinal end of which is closed by an end plate 42B. A sealed closed space 43 is formed inside the closure 40 by closing both longitudinal ends of the sleeve 41 with end plates 42A and 42B. The connection portion 50 is accommodated in the closed space 43 , and the closure 40 , which accommodates the connection portion 50 in the closed space 43 , is arranged inside the hand hole 30 . The closure 40 is an example of a housing having a sealed closed space.

The handhole 30 is an underground box that is buried underground and houses the closure 40 . The handhole 30 is composed of a lower block 31 , an upper block 32 , a frame portion 33 and a lid 34 .

The lower block 31 is a hollow concrete block having a rectangular parallelepiped outer shape. The hollow portion of the lower block 31 is open on the upper side. The lower block 31 also has holes through which the optical fiber cables 61A and 61B pass. The upper block 32 is a hollow concrete block having a rectangular parallelepiped outer shape. The hollow portion of the upper block 32 is open on the lower side. Also, the upper block 32 has a hole 321 penetrating from the hollow portion to the upper surface. The upper block 32 is arranged on the lower block 31 so that the side faces are connected to the side faces of the lower block 31 . In addition, the material of the lower block 31 and the upper block 32 is not limited to concrete, and synthetic resin having water resistance and weather resistance may be used. The frame portion 33 is made of iron, for example, and has a hole 331 penetrating vertically. The frame portion 33 is fixed to the upper surface of the upper block 32 by bolts (not shown) so that the holes 331 and 321 are connected to each other. The lid 34 is a circular concrete or resin lid that closes the hole 331 . Closing the hole 331 with the lid 34 creates a sealed interior space 35 inside the closure 40 .

The sensor module 10 is a module that detects the internal state of the closure 40, which is an example of the periphery of the connecting portion of the optical fiber cable 61A and the optical fiber cable 61B. The sensor module 10 is arranged inside the closure 40 , that is, in the closed space 43 . The sensor module 10 is wirelessly powered by the detection device 20 and wirelessly transmits information indicating the state of the closed space 43 to the detection device 20 .

The detection device 20 is a device that acquires information indicating the state of the environment inside the closure 40 and detects the state of the environment around the detection device 20 . In this embodiment, the sensing device 20 is arranged on the lid 34 and senses the state of the exterior of the handhole 30 . Note that the detection device 20 may be arranged in the internal space 35 . The detection device 20 also wirelessly supplies power to the sensor module 10 and receives information wirelessly transmitted from the sensor module 10 . In the present invention, wireless power supply refers to a power supply system based on an electric field resonance coupling system that combines capacitance components and inductance components to transmit power in a non-contact manner.

FIG. 2 is a block diagram showing configurations of the sensor module 10 and the detection device 20. As shown in FIG. The detection device 20 includes a device control section 200 , a module coupling section 201 , a battery 202 , a communication section 203 and a sensor 204 . A battery 202 is a power source for the detection device 20, and is, for example, a secondary battery. Note that the battery 202 is not limited to a secondary battery, and may be a primary battery. The communication unit 203 is a communication interface that performs communication via a wireless network such as a mobile communication network, wireless LAN, or LPWA (Low Power Wide Area). Sensor 204 is, for example, a water sensor that detects the presence or absence of water. The presence or absence of water is an example of the state of the surrounding environment. The sensor 204 detects the presence or absence of water, and outputs a signal indicating the presence of water or a signal indicating the absence of water to the device control section 200 according to the detection result. The module coupling unit 201 includes, for example, a pair of electrodes for power transmission by the electric field resonance coupling method, a circuit for power transmission, and a demodulation circuit for wireless communication with the sensor module 10. It is connected to the. The module coupling unit 201 supplies power to the sensor module 10 by wireless power supply using the electric field resonance coupling method, and receives information transmitted from the sensor module 10 by wireless communication using the electric field resonance coupling method. The module coupling unit 201 is an example of a power supply unit that wirelessly supplies power to the sensor module 10 . The communication unit 203 is an example of communication means.

The device control section 200 includes a calculation section and a storage section. Device control unit 200 is driven by power supplied from battery 202 . The arithmetic unit performs various kinds of arithmetic processing for realizing the functions of the detection device 20, and is composed of, for example, a CPU (Central Processing Unit), an FPGA (field-programmable gate array), or both a CPU and an FPGA. be. The storage unit includes, for example, ROM (Read Only Memory) and RAM (Random Access Memory). This ROM stores various programs, data, and the like used by the arithmetic unit to perform arithmetic processing. The RAM is also used as a work space when the arithmetic unit performs arithmetic processing and as a space for storing the results of the arithmetic processing of the arithmetic unit. The device control unit 200 executing the program transmits information indicating the detection result of the sensor 204 to the predetermined server device 2 through the communication unit 203 . In addition, the device control unit 200 acquires information (response) transmitted by the sensor module 10, and transmits information indicating the acquired information or a determination result according to the acquired information (response) to a predetermined server in the communication unit 203. Send to device 2. The server device 2 is an example of a data server. The device control unit 200 is an example of a processing unit that detects the environmental state of the closed space 43 and predicts the states of the closure 40 and the optical fiber cables 61A and 61B according to information (response) from the sensor module 10 . A set of the device control unit 200 and the module coupling unit 201 is an example of a receiving unit that wirelessly receives information (response) transmitted from the sensor module 10 .

The sensor module 10 is an example of a sensor module that detects the environmental state of a closed space, and includes a first module 11 and a second module 12 . The first module 11 and the second module 12 are modules for detecting the presence or absence of water.

The first module 11 includes a first control section 110 , a first coupling section 111 , a first rectification section 112 , a first power storage section 113 and a first stabilized power supply 114 . The first coupling unit 111 includes a pair of electrodes for obtaining AC power transmitted by an electric field resonance coupling method and a modulation circuit for wireless communication using the pair of electrodes. It is connected. First coupling portion 111 is an example of a power receiving portion.

FIG. 3 is a diagram for explaining an arrangement example of the pair of electrodes 1111 and 1112 included in the first coupling portion 111. As shown in FIG. The electrodes 1111 and 1112 are conductive rectangular flat electrodes. The electrodes 1111 and 1112 function as antennas for wireless power reception and wireless communication by an electric field resonance coupling method. The electrodes 1111 and 1112 are arranged parallel to each other on the lower surface of the sub-substrate 1113 at a predetermined interval. The rectangular sub-board 1113 is adhered to the main board 1114 with an adhesive 1115 at the edges of the four sides of the bottom surface. By bonding four edge portions of the lower surface of the sub-board 1113 with an adhesive 1115, the electrodes 1111 and 1112 are sealed and waterproofed between the sub-board 1113 and the main board 1114.

The first control section 110 includes a calculation section and a storage section. The first control unit 110 is driven by the power transmitted to the first coupling unit 111 . The arithmetic unit performs various kinds of arithmetic processing for realizing the functions of the first module 11, and is composed of, for example, a CPU, an FPGA, or both a CPU and an FPGA. The storage unit includes, for example, ROM and RAM. The ROM stores various programs and data used by the arithmetic unit to perform arithmetic processing, an identifier for uniquely identifying the first module 11, and the like. The RAM is also used as a work space when the arithmetic unit performs arithmetic processing and as a space for storing the results of the arithmetic processing of the arithmetic unit. The first control unit 110 that is executing the program transmits the aforementioned identifier stored in advance in the storage unit to the detection device 20 through the first coupling unit 111 . For convenience of explanation, an identifier that uniquely identifies the first module 11 will be referred to as a first identifier.

The first rectifying unit 112 rectifies the AC power supplied from the first coupling unit 111, converts it into DC power, and outputs the DC power. The first power storage unit 113 is configured by, for example, a secondary battery, a supercapacitor, an electrolytic capacitor, or the like, and smoothes and outputs the pulsating current output from the first rectifying unit 112 . First stabilized power supply 114 is configured by, for example, a DC-DC converter or the like, and steps down or boosts the DC power output from first power storage unit 113 to a predetermined voltage and outputs it.

The second module 12 includes a second control section 120 , a second coupling section 121 , a second rectification section 122 , a second power storage section 123 and a second stabilized power supply 124 . The second coupling unit 121 includes a pair of electrodes for obtaining AC power transmitted by the electric field resonance coupling method and a modulation circuit for wireless communication using the pair of electrodes. It is connected. Second coupling portion 121 is an example of a power receiving portion.

FIG. 4 is a diagram for explaining an arrangement example of a pair of electrodes 1211 and 1212 included in the second coupling portion 121. As shown in FIG. The electrodes 1211 and 1212 are conductive rectangular flat electrodes. The electrodes 1211 and 1212 function as antennas for wireless power reception and wireless communication by the electric field resonance coupling method. The electrodes 1211 and 1212 are adhered to the upper surface of the main substrate 1214 in parallel with a predetermined interval. The electrodes 1211 and 1212 are exposed to the closed space 43 because they are not sealed like the electrodes 1111 and 1112 .

The second control section 120 includes a calculation section and a storage section. The second control unit 120 is driven by the power transmitted to the second coupling unit 121 . The arithmetic unit performs various kinds of arithmetic processing for realizing the functions of the second module 12, and is composed of, for example, a CPU, an FPGA, or both a CPU and an FPGA. The storage unit includes, for example, ROM and RAM. This ROM stores various programs and data used by the arithmetic unit to perform arithmetic processing, an identifier for uniquely identifying the second module 12, and the like. The RAM is also used as a work space when the arithmetic unit performs arithmetic processing and as a space for storing the results of the arithmetic processing of the arithmetic unit. The second control unit 120 executing the program transmits the aforementioned identifier stored in advance in the storage unit to the detection device 20 through the second coupling unit 121 . The identifier transmitted by second control unit 120 is an identifier different from the identifier transmitted by first control unit 110 . For convenience of explanation, an identifier that uniquely identifies the second module 12 will be referred to as a second identifier.

The second rectifier 122 rectifies the AC power supplied from the second coupling unit 121, converts it to DC power, and outputs the DC power. The second power storage unit 123 is configured by, for example, a secondary battery, a supercapacitor, an electrolytic capacitor, or the like, and smoothes and outputs the pulsating current output from the second rectifying unit 122 . Second stabilized power supply 124 is configured by, for example, a DC-DC converter or the like, and steps down or boosts the DC power output from second power storage unit 123 to a predetermined voltage and outputs it.

Note that the electrodes 1111, 1112, 1211, and 1212 may have a shape other than a rectangle. may

FIG. 5 is a diagram showing the configuration of the module coupling section 201, the first coupling section 111, and the second coupling section 121 relating to electric field resonance coupling. The module coupling section 201 has electrodes 2011 and 2012 , inductors L1 and L2 and an electric field coupling section 2020 . The electrodes 2011 and 2012 are rectangular flat electrodes having electrical conductivity. The electrodes 2011 and 2012 are formed to have the same size as the electrodes 1111, 1112, 1211 and 1212 and are arranged in parallel with a predetermined interval. The electrodes 2011 and 2012 function as antennas for wireless power feeding and wireless communication by the electric resonance coupling method.

The inductors L1 and L2 are, for example, elements in which conductive wires (for example, copper wires) are spirally wound. Inductor L1 has one end electrically connected to electrode 2011 and the other end connected to electric field coupling section 2020 . Inductor L2 has one end electrically connected to electrode 2012 and the other end connected to electric field coupling section 2020 .

Electric field coupling section 2020 is electrically connected to device control section 200 and inductors L1 and L2. Under the control of device control section 200, electric field coupling section 2020 supplies AC power of a predetermined frequency to electrodes 2011 and 2012 via inductors L1 and L2. Electric field coupling section 2020 also includes a demodulation circuit. The electric field coupling unit 2020 demodulates the signals transmitted from the first module 11 and received by the electrodes 2011 and 2012 and supplies them to the device control unit 200 . Also, the electric field coupling unit 2020 demodulates the signals transmitted from the second module 12 and received by the electrodes 2011 and 2012 and supplies them to the device control unit 200 .

First coupling section 111 has inductors L3 and L4 and power receiving section 1120 in addition to electrodes 1111 and 1112 . The inductors L3 and L4 are, for example, elements in which conductive wires (for example, copper wires) are spirally wound. Inductor L3 has one end electrically connected to electrode 1111 and the other end connected to power receiving unit 1120 . Inductor L4 has one end electrically connected to electrode 1112 and the other end connected to power receiving unit 1120 .

Power receiving unit 1120 is electrically connected to first control unit 110 and inductors L3 and L4. Power reception unit 1120 supplies AC power supplied from electrodes 2011 and 2012 to electrodes 1111 and 1112 to first rectification unit 112 . Power reception unit 1120 also includes a modulation circuit. The power receiving unit 1120 modulates information supplied from the first control unit 110 and transmits the information to the detection device 20 through the electrodes 1111 and 1112 .

Second coupling section 121 has inductors L5 and L6 and power receiving section 1220 in addition to electrodes 1211 and 1212 . The inductors L5 and L6 are, for example, elements in which conductive wires (for example, copper wires) are spirally wound. Inductor L5 has one end electrically connected to electrode 1211 and the other end connected to power receiving unit 1220 . Inductor L6 has one end electrically connected to electrode 1212 and the other end connected to power receiving unit 1220 .

Power receiving unit 1220 is electrically connected to second control unit 120 and inductors L5 and L6. Power reception unit 1220 supplies AC power supplied from electrodes 2011 and 2012 to electrodes 1211 and 1212 to second rectification unit 122 . Power reception unit 1220 also includes a modulation circuit. The power receiving unit 1220 modulates information supplied from the second control unit 120 and transmits the information to the detection device 20 through the electrodes 1211 and 1212 .

In this embodiment, the resonance frequency of the capacitor and inductors L1 and L2 formed between the electrodes 2011 and 2012 and the resonance frequency of the capacitor and inductors L3 and L4 formed between the electrodes 1111 and 1112 are equal. For example, it is set to 13.56 MHz. When electric field coupling section 2020 supplies AC power of 13.56 MHz to electrodes 2011 and 2012 , electrodes 2011 and 2012 and electrodes 1111 and 1112 are electric field resonance coupled, and AC power is transmitted to power receiving section 1220 . Further, when the electrodes 2011 and 2012 and the electrodes 1111 and 1112 are electric field resonance coupled, information is transmitted from the first control unit 110 to the electrodes 2011 and 2012 via the electrodes 1111 and 1112 .

Also, the resonance frequency of the capacitor and inductors L1 and L2 formed between the electrodes 2011 and 2012 and the resonance frequency of the capacitor and inductors L5 and L6 formed between the electrodes 1211 and 1212 are set to be equal. and is set to 13.56 MHz. When electric field coupling section 2020 supplies AC power of 13.56 MHz to electrodes 2011 and 2012 , electrodes 2011 and 2012 and electrodes 1211 and 1212 are electric field resonance coupled, and AC power is transmitted to power receiving section 1220 . Further, when the electrodes 2011 and 2012 and the electrodes 1211 and 1212 are electric field resonance coupled, information is transmitted from the second control unit 120 to the electrodes 2011 and 2012 via the electrodes 1211 and 1212 .

Next, an operation example of the detection system 1 will be described with reference to FIG. FIG. 6 is a flowchart showing the flow of processing in the detection system 1. As shown in FIG. The detection device 20 starts the process shown in FIG. 6, for example, at a predetermined timing. The predetermined timing is, for example, a predetermined time of the day, but may also be the passage of a predetermined period of time (eg, one hour), the passage of a predetermined number of days (eg, one day, one week), or the like. When the predetermined timing comes, the detection device 20 acquires the signal output from the sensor 204 and detects the surrounding state of the detection device 20 (step S101). Here, when the detection device 20 acquires a signal indicating the presence of water from the sensor 204, the detection device 20 determines that there is water outside the handhole 30, and acquires a signal indicating the absence of water from the sensor 204. If so, it is determined that there is no water outside the handhole 30 .

Further, the detection device 20 supplies power to the sensor module 10 from the module coupling portion 201 (step S102). That is, the sensing device 20 supplies power to the first module 11 and the second module 12 . The sensor module 10 detects the state of the closed space 43 in response to power supply, and responds the detected state to the detection device 20 (step S103). Specifically, for example, when water does not enter the closed space 43 , the power supplied by the detection device 20 is received by the first coupling section 111 and the first control section 110 is driven. The first module 11 driven by the first control unit 110 transmits the first identifier. Further, the power supplied by the detection device 20 is received by the second coupling section 121, and the second control section 120 is driven. The second module 12 driven by the second controller 120 transmits the second identifier. That is, the first module 11 and the second module 12 are capable of responding to the detection device 20 . The first identifier and second identifier sent to sensing device 20 are an example of a response from sensor module 10 to sensing device 20 .

On the other hand, when water enters the closed space 43, the electrodes 1211 and 1212 are exposed to the closed space 43 without being sealed as described above, and are therefore soaked in the water. When the electrodes 1211 and 1212 are immersed in water, the dielectric constant of the capacitor formed between the electrodes 1211 and 1212 significantly increases, and the capacitor formed between the electrodes 1211 and 1212 and the inductors L5 and L6 Resonance frequency changes. When the resonance frequency in the second coupling section 121 changes in this way, the electrodes 2011 and 2012 and the electrodes 1211 and 1212 are not electrically coupled, and power is not supplied to the second control section 120, so that the second identifier is detected by the detection device. 20 will not be sent. That is, the second module 12 cannot respond to the detection device 20 .

Since the electrodes 1111 and 1112 are sealed and waterproofed by the adhesive 1115 as described above, even if water enters the closed space 43, the dielectric of the capacitor formed between the electrodes 1111 and 1111 will remain unchanged. The ratio does not change and the resonant frequency due to the capacitor formed between electrodes 1211 and 1212 and inductors L5 and L6 does not change. Even if water enters the closed space 43, the resonance frequency of the capacitor formed between the electrodes 1211 and 1212 and the inductors L5 and L6 does not change. and electrodes 1111 , 1112 are electric field resonant coupled, power is supplied to the first controller 110 and the first identifier is transmitted to the sensing device 20 . That is, the first coupling portion 111 and the second coupling portion 121 function as detection portions that detect the state of the environment in the closed space 43 . In addition, a set of the first control unit 110 and the first coupling unit 111 and a set of the second control unit 120 and the second coupling unit 121 are a response unit that responds to the detection device 20, and a transmission that wirelessly transmits information to the detection device 20. functions as a department.

The detection device 20 receives the response from the sensor module 10 and stops supplying power to the sensor module 10 (step S104). Here, when water does not enter the closed space 43, the detection device 20 responds from the sensor module 10 with the first identifier transmitted from the first module 11 and the identifier transmitted from the second module 12. Receive a second identifier.

On the other hand, the detection device 20 receives the first identifier transmitted from the first module 11 when water enters the closed space 43 . That is, the response from the sensor module 10 is obtained. Further, when water enters the closed space 43 , the detection device 20 does not receive the second identifier because the second identifier is not transmitted from the second module 12 .

Next, the detection device 20 transmits the detection result of the state of the surroundings of the detection device 20 and the detection result of the state of the closed space 43 to the server device 2 and notifies them (step S105). Specifically, when the detection device 20 determines in step S101 that there is water outside the handhole 30, the detection result of the surrounding state of the detection device 20 indicates that there is water outside the handhole 30. When it is determined that there is no water outside the handhole 30, the communication unit 203 transmits information indicating that there is no water outside the handhole 30. Send to the server device 2 . Further, when both the first identifier and the second identifier are received in step S104, the detection device 20 determines that water has not entered the closed space 43, and detects the state of the closed space 43 as the closed space The communication unit 203 transmits to the server device 2 information indicating that there is no water in the device 43 . Further, when the first identifier is received in step S104 and the second identifier is not received, the detection device 20 determines that water has entered the closed space 43, and detects that water is present in the closed space 43. The information shown is transmitted to the server device 2 by the communication unit 203 .

After completing the process of step S105, the detection device 20 shifts to a standby mode (step S106) and waits until a predetermined timing. Note that the detection device 20 may transfer the response (first identifier, second identifier) received from the sensor module 10 to the server device 2 without determining whether water has entered the closed space 43 in step S105. In this case, the server device 2 receives the response transferred from the detection device 20, and determines that water has not entered the closed space 43 when the received response is the first identifier and the second identifier. If the received response is only the first identifier, it may be determined that water has entered the closed space 43 .

As described above, in this embodiment, the sensor module 10 transmits different identifiers to the detection device 20 depending on the presence or absence of water in the closed space 43. It functions as a sensor to detect.

According to this embodiment, the presence or absence of water in the closed space 43 can be detected without opening the lid 34 of the handhole 30, and whether or not water has entered the interior of the closure 40 can be known. Further, according to the present embodiment, since the information indicating the presence or absence of water in the closed space 43 is transmitted from the detection device 20 to the server device 2, the inside of the closure 40 can be detected without going to the place where the handhole 30 is installed. It is possible to know whether or not water has entered. In addition, in the present embodiment, electric power is supplied and communication is performed by electric field resonance coupling. Therefore, even if the cover 34 is thick, power can be supplied to the sensor module 10 and the detection device 20 and the sensor module 10 can communicate with each other. Even if the device 20 and the sensor module 10 are separated from each other, the detection device 20 and the sensor module 10 can communicate with each other by supplying power. Further, for example, when the detection device 20 is installed inside the closure 40 to detect the entry of water into the closed space 43, if the closure 40 and the detection device 20 are flooded, the radio wave of the communication unit 203 will be lost. Although there is a possibility that the detection device 20 will be attenuated by water and communication will not be possible, in this embodiment, since the detection device 20 that communicates with the server device 2 is located outside the handhole 30, the possibility that the detection device 20 will be submerged in water is low. , the server device 2 can be notified that water has entered the interior of the closure 40 .

[Modification]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be implemented in various other forms. For example, the present invention may be implemented by modifying the above-described embodiment as follows. It should be noted that the above-described embodiment and the following modified examples may be combined with each other. The present invention also includes configurations obtained by appropriately combining the constituent elements of the above-described embodiments and modifications. Further effects and modifications can be easily derived by those skilled in the art. Therefore, broader aspects of the present invention are not limited to the above-described embodiments and modifications, and various modifications are possible.

The first module 11 includes, for example, at least one of a sensor that detects temperature, a sensor that detects humidity, a sensor that detects atmospheric pressure, and a sensor that detects vibration. , and the detection device 20 may transmit information indicating the received detection result to the server device 2 . According to this configuration, information indicating at least one of the temperature, humidity, air pressure, and vibration within the closed space 43 is transmitted to the server device 2, and the environment within the closed space 43 can be known in detail.

Further, the detection device 20 may be configured to include the same sensor as the sensor included in the first module 11 . According to this configuration, for example, when the first module 11 and the detection device 20 are provided with temperature sensors, the temperature information of the closed space 43 and the detection device 20 ambient temperature information can be sent to the server device 2 . Further, for example, when the first module 11 and the detection device 20 are provided with an air pressure sensor, information on the air pressure of the closed space 43 as the state of the closed space and the state of the surroundings of the detection device 20 and the air pressure around the detection device 20 information can be transmitted to the server device 2 .

Moreover, when the first module 11 and the detection device 20 are provided with the same sensor, the server device 2 may statistically process the transmitted information. FIG. 7 is a diagram showing an example of a flowchart showing the flow of processing performed by the server apparatus 2. As shown in FIG. The server device 2 calculates a moving average of the state of the closed space and the state of the surroundings of the detection device 20 (step S201). For example, when the server device 2 receives temperature as the state of the closed space and the state of the surroundings of the detection device 20, the moving average of the temperature around the detection device 20 and the moving average of the temperature of the closed space 43 are calculated. . Next, the server device 2 compares the calculated moving average of the state around the detection device 20 with the moving average of the state of the closed space 43 (step S202). The server apparatus 2 notifies the administrator according to the comparison result of step S202 (step S203). For example, if the difference in moving average is less than a predetermined threshold, the server device 2 notifies the administrator. For example, when the hand hole 30 or the closure 40 is damaged, the difference between the temperature around the detection device 20 and the temperature of the closed space 43 becomes small, and the moving average of the temperature around the detection device 20 and the temperature of the closed space 43 The temperature moving average difference is less than a predetermined threshold. Here, by notifying the administrator, the administrator can be notified of the breakage of the handhole 30 or the closure 40 . The server device 2 may predict progress of deterioration of the handhole 30, the closure 40, and the optical fiber cables 61A and 61B from the comparison result of step S202, and notify the prediction result. The server device 2 is an example of a prediction unit. Further, the detection device 20 may perform the processing performed by the server device 2, and progress of deterioration of the handhole 30, the closure 40, and the optical fiber cables 61A and 61B may be predicted from the comparison result of step S202.

Sensing device 20 may, for example, be placed on lid 34 for a predetermined period of time. For example, the detection device 20 may be installed on the lid 34 within a predetermined period of time after the closure 40 is newly installed on the handhole 30 . Further, the detection device 20 may be installed on the lid 34 within a predetermined period after the closure 40 is replaced. In this case, the ingress of water due to the initial failure of the closure 40 can be detected. Alternatively, the detection device 20 may be installed on the lid 34 during the rainy season or when a typhoon occurs, and the detection device 20 may not be installed on the lid 34 during other seasons. In this case, it is possible to detect water intrusion into the closure 40 during times when disasters due to rain are likely to occur. Alternatively, the detection device 20 may be installed on the lid 34 after a predetermined period of time has elapsed since the closure 40 was installed. For example, the detector 20 may be installed on the lid 34 when the number of years that have elapsed since installation reaches the age at which the closure 40 begins to deteriorate. In this case, water intrusion due to deterioration of the closure 40 can be detected. Thus, when the timing for installing the detection devices 20 is limited, the number of the detection devices 20 to be installed can be reduced compared to the case where the detection devices 20 are installed in all the hand holes 30 housing the closures 40. and the installation cost of the detection device 20 can be reduced.

In the above-described embodiment, the sensor module 10 includes the first module 11 and the second module 12, but may be configured without the second module 12. FIG. In the configuration without the second module 12, the first module 11 is configured to include a water sensor for detecting water, and the first module 11 sends the detection result of the presence or absence of water from the water sensor to the detection device 20. Send. With this configuration as well, it is possible to detect the presence or absence of water in the closed space 43 and to know whether or not water has entered the interior of the closure 40 .

Although the detection device 20 includes the sensor 204 in the above-described embodiment, it may be configured without the sensor 204 .

In the above-described embodiments, the sensing device 20 may include, for example, a solar panel and may be configured to charge the battery 202 with the solar panel.

In the above-described embodiment, the closure 40 containing the sensor module 10 is installed inside the hand hole 30. However, the closure 40 containing the sensor module 10 is installed inside a cable trough with a lid to detect the sensor module 10. The device 20 may be installed in the lid of the cable trough. In addition, the installation location of the detection system 1 is not limited to the handhole 30 or cable trough. , the sensor module 10 and the sensor module 10 may be installed at a position where electric field resonance coupling is possible and the communication unit 203 is capable of wireless communication.

In the above-described embodiment, the detection device 20 is installed on the lid 34, but the configuration is not limited to installation on the lid 34. For example, the detection device 20 is mounted on a drone, and the detection device 20 is may be brought closer to the sensor module 10 . According to this configuration, when desired, the detection device 20 can be brought close to the sensor module 10 by a drone to supply power to the first module 11 and the second module 12, and to know whether or not water has entered the closure 40. can be done.

In the above-described embodiment, the detection device 20 supplies power to the first module 11 and the second module 12 at predetermined times. 12 may be powered. Further, the detection device 20 supplies power to the first module 11 and the second module 12 according to an instruction from the server device 2, and detects information transmitted from the first module 11 and the second module 12 to which power is supplied. , information indicating whether or not water has entered the closed space 43 may be transmitted to the server device 2 . Further, when the sensor 204 detects the presence of water, the detection device 20 may supply power to the first module 11 and the second module 12 and obtain a response from the sensor module 10 . Further, in a configuration in which the detection device 20 includes a vibration sensor as the sensor 204, when the sensor 204 detects vibration equal to or greater than a predetermined threshold, power is supplied to the first module 11 and the second module 12, and the sensor module 10 may be obtained.

As described above, in a configuration in which the detection system 1 includes a sensor other than a sensor that detects water, if the detection device 20 and the first module 11 include sensors that detect the same physical quantity, the server device 2 may notify the administrator according to the relationship between the physical quantity detected by the sensor of the detection device 20 and the physical quantity detected by the sensor of the first module 11 . For example, in a configuration in which the detection device 20 and the first module 11 are equipped with humidity sensors, the difference between the humidity detected by the sensor of the detection device 20 and the humidity detected by the sensor provided in the first module 11 is If it is less than a predetermined threshold, the server device 2 that has received these measurement results may notify the administrator. Further, in a configuration in which the detection device 20 and the first module 11 are provided with temperature sensors, the difference between the temperature detected by the sensor of the detection device 20 and the temperature detected by the sensor provided in the first module 11 is If it is equal to or greater than a predetermined threshold, the server apparatus 2 that has received these measurement results may notify the administrator.

Reference Signs List 1 detection system 2 server device 10 sensor module 11 first module 12 second module 20 detection device 30 handhole 31 lower block 32 upper block 33 frame 34 lid 35 internal space 40 closure 41 sleeve 42A, 42B end plate 43 closed space 50 Connectors 61A, 61B Optical fiber cable 110 First control unit 111 First coupling unit 120 Second control unit 121 Second coupling unit 200 Device control unit 201 Module coupling unit 202 Battery 203 Communication unit 204 Sensors 321, 331 Holes 1111, 1112 , 1211, 1212, 2011, 2012 electrode 1113 sub-substrate 1114, 1214 main substrate 1115 adhesive 1120, 1220 power receiving unit 2020 electric field coupling unit L1 to L6 inductor

Claims (12)

a housing forming a closed space;
an article stored in the closed space;
a sensor module arranged in the closed space;
a detection device arranged outside the closed space;
A detection system comprising:
The sensor module is
a power receiving unit that wirelessly receives power supplied from the detection device;
a detection unit that detects the state of the environment in the closed space from the power wirelessly received by the power reception unit;
a transmission unit that wirelessly transmits information indicating the detection result of the detection unit to the detection device;
with
The detection device is
a power supply unit that wirelessly supplies power to the sensor module;
a sensor that detects the state of the environment outside the closed space;
a receiving unit that wirelessly receives the information;
a processing unit that performs processing based on the information received by the receiving unit;
with
The processing unit is
A detection system that predicts the state of the housing or the article based on the state detected by the sensor and the state indicated by the information received by the receiving unit. The detection system according to claim 1, wherein the closed space is a space inside a sealed housing. 3. The detection system according to claim 2, wherein the housing is a closure that accommodates a connecting portion of a cable. The detection system according to any one of claims 1 to 3, wherein the detection device determines presence or absence of water in the closed space according to the information. the sensor detects at least one of temperature, humidity, air pressure or vibration of the surrounding environment;
The sensor module transmits information indicating at least one of the temperature, humidity, air pressure, or vibration of the closed space to the detection device;
5. The sensing system of any one of claims 1-4, wherein the sensing device receives the information. The sensor module is
a sensor that detects the state of the environment in the closed space;
has
The transmission unit transmits information indicating a state detected by the sensor,
The detection system according to any one of claims 1 to 5, wherein the sensor and the transmission unit operate by power supply from the detection device. The detection system according to any one of claims 1 to 6, wherein the detection device includes a battery, and electric power of the battery is used to supply power to the sensor module and to drive a sensor included in the detection device. The sensor provided in the detection device detects at least one of temperature, humidity, presence or absence of water, air pressure or vibration of the surrounding environment,
Comparing the state of the surrounding environment detected by the detection device with the sensor included in the detection device and the information received by the detection device, and progress of deterioration of the housing constituting the closed space based on the comparison result The detection system according to any one of claims 1 to 7, comprising a prediction unit that predicts the . The detection system according to any one of claims 1 to 8, wherein the wireless power feeding method is an electric field resonance method. The sensor module is
a first module that is waterproof and responsive to the sensing device when submerged and when not submerged;
a second module that is non-waterproof and responsive to the detection device when not submerged, and non-responsive to the detection device when submerged;
has
10. The detection device determines presence or absence of water in the closed space according to information transmitted from the first module and information transmitted from the second module. A detection system according to clause. 11. The sensing system of any one of claims 1-10, wherein the sensors of the sensing device are waterproof. The detection device comprises communication means for notifying a data server of the state of the surrounding environment detected by the sensor included in the detection device and the state of the environment of the closed space detected by the sensor module. 12. The sensing system according to any one of Clauses 11 to 12.

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