JP7312482B2 - Natural energy wireless sensor - Google Patents

Description

The present invention relates to a wireless sensor that does not require a battery or power wiring.

In recent years, the sensor market has expanded rapidly due to the growing momentum of IoT, and there is an increasing demand for data analysis and utilization using various sensors such as temperature, humidity, pressure, vibration, acceleration, sound, light, flow velocity, speed, distance measurement, and GPS.
In addition, it is thought that future use will rapidly increase in applications such as safety confirmation and automation.

As a sensor device, it is common to use a two-system wiring method in which power is supplied through a power supply wiring, a microcomputer is used to control the sensor and acquire data, and then data is transmitted through a signal line.
However, wiring to sensor devices poses major challenges, such as high construction costs, a heavy burden of routing and rearranging work, and the need to use shielded wires to prevent crosstalk problems.
In addition, when the number of sensors increases, or when installing in a large area or on a production line, the above problems become even more serious, and maintenance and management problems such as the weight of the entire device due to the weight of the wiring, the difficulty of restoring when the wire is broken, and the difficulty of finding and correcting defective contact and worn points.

In addition, as an IoT response, when sensors are added to aging equipment later to make the performance closer to the latest equipment, or when new equipment is introduced and replaced or rearranged, there are similar sensor wiring problems.
Many of the manufacturing facilities in Japan are aging and not the latest model, so it is necessary to install various sensors for IoT, but with wired sensors, it is difficult to change wiring when changing processes. For this reason, it is said that IoT is difficult, and it is conceivable that it will become an increasingly important issue in the future.

There are also sensor devices equipped with batteries to eliminate wiring for power supply to sensor devices, but due to the production and consumption of a large amount of batteries, we are facing new problems such as replacement work costs, disposal costs, and environmental impact.
In addition, since the battery needs to be replaced, it can only be installed in places where replacement work is possible, and the size and weight of the battery is large and heavy, so the size and weight of the entire sensor device cannot be reduced, limiting the installation location.
Furthermore, since data acquisition is interrupted when the battery is replaced, there is also the problem that it is difficult to use for facilities that require continuous data acquisition and that are difficult to stop.

A method of wirelessly transmitting power has also been considered, but attenuation is large when electromotive force is spatially transmitted, and it is necessary to transmit a large amount of power in order to activate the sensor device. Therefore, it cannot be used in an environment where there is a risk of radio interference, and it cannot be used anywhere.
In addition, when trying to activate a large number of sensor devices by wireless transmission of power, the space will be flooded with radio waves.

As a solution to the above problem, there is known an RFID tag in which sensor data can be written semi-permanently by providing a self-power generation function (for example, Patent Document 1: Japanese Patent Application Laid-Open No. 2006-52742).
In addition, it is known that sensor data acquisition and transmission for belt conveyor abnormality monitoring are wirelessly transmitted without battery replacement by using a vibration self-power generation device using a piezoelectric element (for example, Patent Document 2: JP 2021-1075).

JP-A-2006-52742 Japanese Patent Application Laid-Open No. 2021-1075

However, in the technique of Patent Document 1, a large power of 1 W must be wirelessly transmitted as an electromotive force from the reader/writer equipment to read the RFID tag, and when considering large-scale management of several to several thousand units, there is a problem that it cannot be used in an environment where there is a risk of radio interference. In addition, since the power received by the sensor is very small, long-distance communication is difficult, and it is not suitable for wide-area management. In addition, complex processing such as data calculation is not possible, and it is difficult to use sensors that use a large amount of power other than temperature and humidity.

In the technology of Patent Document 2, self-generated power is weak, and it is necessary to store power for a relatively long time, such as 6 hours, to transmit sensor data, compared to the power consumption of the device, and continuous measurement cannot be performed. Therefore, it cannot be used for applications that require urgency and quick response, such as detecting accidents and troubles.

In addition, as energy harvesting technology known in the past, solar power generation cannot be used in an environment without light, thermoelectric power generation can only be used in an environment with a heat source, and vibration power generation has a small amount of power generation, and if you try to obtain a large amount of power, the size will increase proportionally.

The inventors of the present invention have found that sufficient electric power that can be used by the sensor device is naturally generated on the conductive metal surface of the object to be measured.

That is, the present invention has been made to solve the above problems, and an object of the present invention is to provide a wireless sensor that does not require a battery or power supply wiring to obtain sensor data of an object to be measured in various environments.

According to the spontaneously-generated wireless sensor of the present invention, the spontaneously-generated wireless sensor is used by being attached to an object to be measured whose surface is a conductor such as a metal, and is equipped with a power source unit that collects and uses high-frequency power that is naturally generated by electromagnetic induction with the surrounding electric and magnetic fields in a vibrating object whose surface is a conductor such as a metal. It is characterized in that a terminal for
In addition, the self-power generation wireless sensor is used by being attached to an object to be measured whose surface is a conductor such as metal, and is equipped with a power supply unit that collects and uses high-frequency power that is naturally generated by electromagnetic induction with the surrounding electric field and magnetic field in the vibrating object whose surface is a conductor such as metal. A collection terminal is provided.
By adopting this configuration, it is possible to provide a wireless sensor that does not require a battery and power supply wiring because it uses high-frequency power that is naturally generated in the object to be measured.

Further, the power supply unit may have a surface made of a conductor such as a metal, and have a function of rectifying high-frequency power that is naturally generated by electromagnetic induction with the surrounding electric field and magnetic field in a vibrating object to be measured.
According to this configuration, it is possible to rectify the high-frequency power generated in the conductive metal on the surface of the object to be measured into direct-current power for use.

In addition, the power supply unit may have a surface made of a conductor such as a metal, and have a function of voltage-controlling high-frequency power that is naturally generated by electromagnetic induction with a surrounding electric field and magnetic field in a vibrating object to be measured.
According to this configuration, the collected high-frequency power can be controlled to a predetermined voltage value and used.

Further, the power supply unit may have a surface made of a conductor such as a metal, and have a function of storing high-frequency power that is naturally generated by electromagnetic induction with a surrounding electric field and magnetic field in a vibrating object to be measured.
According to this configuration, it is possible to stably supply power even if there is a fluctuation in the power value that naturally occurs in the object to be measured.

Further, the power supply unit may include a sensor unit that acquires the state of the object to be measured and a transmission/reception unit that externally communicates the data obtained by the sensor unit, and the power supply unit may be characterized in that the surface of the measurement object is a conductor such as a metal, and in the vibrating object to be measured, high-frequency power that is naturally generated by electromagnetic induction with the surrounding electric field and magnetic field is collected, and the collected high-frequency power is supplied to the sensor unit and the transmission/reception unit .
According to this configuration, sensor data can be continuously acquired semipermanently and transmitted wirelessly without requiring a battery and power supply wiring.

Further, it may be characterized by comprising a sensor unit that acquires the state of the object to be measured, a control unit that performs calculation of data obtained by the sensor unit and overall operation management, and a transmission/reception unit that externally communicates the data obtained by the sensor unit.
According to this configuration, sensor data can be continuously acquired semipermanently and transmitted wirelessly without requiring a battery and power supply wiring.

Further, the control unit or the transmission/reception unit may be characterized by managing the data obtained by the sensor unit using an individual identification ID.
According to this configuration, when using a large number of naturally-generated wireless sensors, sensor data can be linked without confusion.

Further, the control unit may be characterized by executing digitization processing of data obtained by the sensor unit.

Further, it may be attached to the conductive metal on the surface of the object to be measured with an adhesive, a screw, a bolt, or an adhesive tape.

It may also be characterized in that it is attached via an intermediate conductor arranged between the object to be measured or on the object to be measured.
By adopting this configuration, even when the conductor metal on the surface of the object to be measured is insulated by painting or the like, the power generated by the intermediate conductor can be used for operation.

Moreover, it may be characterized in that it is attached to the object to be measured with a structure in which an insulator and a conductor metal are combined interposed therebetween.
By adopting this configuration, a capacitor action can be formed between the surface of the conductor metal of the object to be measured and the wireless sensor, and high-frequency power generated on the surface of the conductor metal can be captured.

According to the present invention, it is possible to provide a wireless sensor that does not require a battery and power wiring.

It is a block diagram showing an internal configuration of a natural power generation wireless sensor. FIG. 2 is a schematic explanatory diagram showing a place where a spontaneously-generated wireless sensor is attached to an object to be measured; FIG. 4 is a schematic explanatory diagram showing an example in which a self-generated wireless sensor is attached to an object to be measured with an adhesive tape or an adhesive; FIG. 10 is a schematic explanatory diagram showing another example in which a self-generated wireless sensor is attached to a measurement object with an adhesive tape or an adhesive; FIG. 10 is a schematic explanatory diagram showing an example in which a natural power generation wireless sensor is attached to an object to be measured with screws or bolts; FIG. 4 is a schematic explanatory diagram showing a place where a spontaneously-generated wireless sensor is attached to an object to be measured via an intermediate conductor; FIG. 4 is a schematic explanatory diagram showing an example in which an intermediate conductor is installed at a position separated from a spontaneously-generated wireless sensor; FIG. 4 is a schematic explanatory diagram showing a place where the spontaneous power generation wireless sensor is attached to the measurement object through an insulator; FIG. 2 is a schematic explanatory diagram showing a plurality of spontaneously generating wireless sensors attached to one conductor metal on the surface of the object to be measured;

(overall structure)
The natural power generation wireless sensor in this embodiment will be described below with reference to the drawings. In addition, the spontaneous generation wireless sensor of the present invention is not limited to the following embodiments.
FIG. 1 shows a block diagram of the internal configuration of the naturally-generated wireless sensor, and FIG. 2 shows how the naturally-generated wireless sensor is attached to the object 11 to be measured.

The naturally-generated wireless sensor 10 (hereinafter, sometimes simply referred to as a wireless sensor) in the present embodiment can continuously acquire sensor data obtained by measuring the measurement object 11 in various environments by using the power naturally generated in the measurement object 11, semipermanently and continuously without the need for a battery or power supply wiring, and can transmit the acquired sensor data wirelessly.

The wireless sensor 10 includes a sensor unit 20 that acquires the state of the measurement object 11, a control unit 30 that calculates, records, digitizes, and operates the sensor data obtained by the sensor unit 20, a transmission/reception unit 40 that externally communicates the obtained sensor data, and a power supply unit 50 that supplies operating power to the sensor unit 20, the control unit 30, and the transmission/reception unit 40.
However, the wireless sensor 10 may be configured without the control unit 30 . In this case, a memory for storing sensor data may be provided.

(Sensor part)
The sensor unit 20 can be at least one or more sensors such as a temperature sensor that measures temperature change, an acceleration sensor that measures acceleration change, a humidity sensor that measures humidity change, a pressure sensor that measures pressure change, a magnetic sensor that measures magnetic change, a light intensity sensor that measures light intensity change, a volume sensor that measures sound, a range sensor that measures distance, a flow sensor that measures the flow rate of liquid or gas, a gyro sensor that measures angular velocity, an infrared sensor that measures infrared rays, and a vibration sensor that measures vibration. However, the type of sensor unit 20 is not limited to these sensors.

The sensor unit 20 can be used with high reliability by being built inside the wireless sensor 10, but it may be externally connected according to a request such as connecting only the sensor from a remote location.

(control part)
The control unit 30 has a function of calculating the sensor data from the sensor unit 20 and a function of controlling the operation of the wireless sensor 10 as a whole. Sensor data from the sensor section 20 can also be stored in a storage area within the control section 30 . The sensor data to be stored is data digitized within the control unit 30 . Note that the storage area for storing the sensor data is not limited to the storage area in the control unit 30, and a storage area may be provided in the data transmission/reception unit 40, or other storage memory may be provided.

The control unit 30 digitally processes the sensor data input from the sensor unit 20 and outputs the digitally processed sensor data to the transmission/reception unit 40 . Further, the control unit 30 can manage the operating time of each of the sensor unit 20 and the transmitting/receiving unit 40 and control them to operate appropriately intermittently. As a result, efficient and power-saving operation of the wireless sensor 10 can be realized. As a result, even if the electricity that is naturally generated in the object to be measured is weak, it is possible to perform continuous sensing operations using minute electric power.

The wireless sensor 10 has an identification ID for individual identification. As a result, when a large number of wireless sensors 10 such as several thousand are used, sensor data can be linked without confusion.
The identification ID is held in the control unit 30 and/or the transmission/reception unit 40, but the identification ID may be held using other external memory or the like. In the case of a passive communication method or an active communication method having an identification ID in advance, it is used, and in the case of using another communication method, by adding an identification ID separately, individual identification can be made possible.

(Transceiver)
The transmitter/receiver 40 has a semiconductor for wireless communication, an antenna for external communication, and a memory for storing settings.
The transmitting/receiving unit 40 can use 920 MHz UHF band communication and 2.4 GHz band communication, but communication using frequency bands other than the above may also be used.
In addition, as a communication method of the transmitting/receiving unit 40, it is preferable to adopt a semi-passive communication method when the power naturally generated in the object to be measured is small, and an active communication method can be used when there is sufficient power. This makes it possible to extend the communication distance and increase the degree of freedom of communication.

(Power supply part)
The power supply unit 50 efficiently collects and converts power naturally generated in the measuring object 11 such as machines, production lines, buildings such as steel frames, control equipment such as motors, heaters and control boxes, and vehicles.
The power supply unit 50 supplies power naturally generated in the object 11 to be measured to each component of the sensor unit 20 , the control unit 30 , and the transmission/reception unit 40 . However, the measurement object 11 is not limited to the above.

The power supply unit 50 collects power that is naturally generated in the measurement object 11 and converts it into usable power, and the power supply unit 50 itself does not generate power. The power supply unit 50 also has a function of temporarily storing power naturally generated in the measurement object 11 for power stabilization and applications that require a large amount of power.
Therefore, there is no problem of running out of battery, and the wireless sensor 10 can be used semipermanently while attached to the object to be measured.
The power obtained from the conductive metal on the surface of the measurement object 11 is AC power, and its frequency is high frequency (kHz band to MHz band). This does not match the frequency of vibration of the measurement object.

The surface of the object to be measured to which the wireless sensor 10 is attached is a conductor such as metal. A high frequency is naturally generated in the conductor on the surface of the measurement object 11 . The high-frequency power flowing through the conductor metal on the surface of the measurement object 11 is 0.00 per second. It is on the order of several μW to several tens of thousands of μW, and the power supply section 50 is provided so that the input terminal can come into contact with the conductor on the surface of the measurement object 11 so that this high-frequency power can be collected and used. However, the collection of electric power in the power supply unit 50 is efficiently preferably in contact with the conductor on the surface of the measurement object 11, but may be in a non-contact manner.

Regarding the principle of spontaneous generation of high frequency in the object 11 to be measured, it is considered that it is generated by electromagnetic induction between the vibrating conductor metal in the object 11 to be measured and the electric field (electric field) and magnetic field (magnetic field) around the object 11 to be measured. Metal has a high vibration propagation speed and is easily transmitted, so complex vibrations such as reflection and resonance are generated. As a result, the vibration causes the conductor metal to move in the electric field (electric field) and magnetic field (magnetic field), and it is thought that high frequency is generated.
Moreover, since the generated high-frequency power has a high frequency, most of the power is considered to propagate in a complicated manner on the conductor surface.

Considering that the electric field (electric field) and magnetic field (magnetic field) around the object 11 to be measured is generated when the object 11 to be measured is operated, it is conceivable that a larger amount of electric power can be collected by turning on the power to the object 11 to be driven, such as a machine, equipment, production line, motor, etc., and the vibration increases and the electric field (electric field) and magnetic field (magnetic field) are generated.
In addition, even if the measurement object 11 is a control facility such as a heater or a control box, or a stationary object such as a steel frame building, if an electric field (electric field) and a magnetic field (magnetic field) exist around the measurement object 11, the electric power generated based on this electric field (electric field) and magnetic field (magnetic field) can be used. In this case, the power obtained is smaller than that of the vibrating measurement object 11, but it can be used by storing power in the power storage unit 56, which will be described later. Electric power is also generated by radio waves reaching the surroundings of the measurement object 11 in a stationary state, but the electric power generated in this case is extremely small.

The power supply section 50 includes an AC/DC converter 52 that rectifies high frequency power and converts it to usable DC power.
The power supply unit 50 can also include a DC/DC converter 54 that converts the voltage of the DC power converted by the AC/DC converter 52 . The DC/DC converter 54 can boost the power naturally generated in the object to be measured to a voltage that can be used by the sensor section 20, the control section 30, and the transmitting/receiving section 40, respectively.
The power supply unit 50 also includes an electricity storage unit 56 that stores the collected power. Therefore, even if the power value naturally generated in the object 11 to be measured fluctuates, stable power supply can be performed.

The amount of electric power that can be obtained through the AC/DC converter 52 varies greatly depending on the size of the installed equipment and the amount of electric power used by the equipment. It ranges from several μW to tens of thousands of μW, and in many cases it can be as large as 100 μW or more.
Therefore, the wireless sensor 10 can obtain power from sensing to enable multiple complex operations such as data calculation/recording, digitization processing, and wireless transmission/reception. Alternatively, the wireless sensor 10 may be provided with an LED as a display function to light the LED. Furthermore, the wireless sensor 10 can also have a function of issuing an alarm, for example. Additionally, a GNSS receiver may be provided to allow location determination.

(Attachment to object to be measured)
The measurement object 11 to which the wireless sensor 10 is attached is not limited to equipment such as machines, equipment, production lines, and motors that often generate electric fields (electric fields) and magnetic fields (magnetic fields).

The conductor metal to which the wireless sensor 10 is attached in the object 11 to be measured may be copper, aluminum, titanium, stainless steel, or iron, but is not limited to these materials. As for the conductor metal in the object 11 to be measured, a larger size is more efficient in terms of power generation, but a smaller size can also be used.
Also, the shape of the conductor metal in the object 11 to be measured can be plate-like, cylinder-like, cylindrical, block-like, or bar-like, but is not limited to these shapes.

When the wireless sensor 10 is attached to the conductive metal on the surface of the object to be measured 11, the input terminal of the power supply unit 50 is attached so as to conduct with the conductive metal on the surface of the object to be measured.

FIG. 3 shows an example in which a wireless sensor is attached to an object to be measured using adhesive tape or adhesive.
In this example, the adhesive tape or adhesive 25 is attached or applied to the entire mounting surface of the wireless sensor 10, which is the surface facing the surface of the object 11 to be measured, and the wireless sensor 10 is attached to the conductor metal on the surface of the object 11 to be measured.
The adhesive tape or adhesive 25 is made of an insulating material, and the wireless sensor 10 is attached to the conductive metal on the surface of the measurement object 11 via the insulating material.
Therefore, a capacitor action can be formed between the conductor metal of the measurement object 11 and the wireless sensor 10, and high-frequency power generated on the surface of the conductor metal of the measurement object 11 can be captured.

FIG. 4 shows another example in which a wireless sensor is attached to an object to be measured using an adhesive tape or adhesive.
In this example, an adhesive tape or adhesive 25 is attached or applied to a portion of the mounting surface of the wireless sensor 10, which is the surface facing the surface of the object 11 to be measured, and a power collection terminal 26 is provided where the adhesive tape or adhesive 25 does not exist.
The power collecting terminal 26 is formed to protrude from the mounting surface of the wireless sensor 10 by the thickness of the adhesive tape or adhesive 25 and is electrically connected to the conductive metal on the surface of the measurement object 11 . As a result, the power collecting terminal 26 can take in the high-frequency power generated on the surface of the conductor metal of the object 11 to be measured.
The position of the power collecting terminal 26 is not limited to the position shown in FIG.

FIG. 5 shows an example in which a wireless sensor is attached to an object to be measured using screws or bolts.
The conductive metal on the surface of the measurement object 11 is preliminarily formed with screw grooves to be screwed with fixing screws or bolts 28 . Further, the wireless sensor 10 is also formed with a through hole 35 having a diameter through which the screw or bolt 28 can be inserted so as to penetrate from the upper surface toward the mounting surface.
In the example of FIG. 5, a power collecting terminal 34 is provided at a position in contact with the lower surface of the head 33 of the screw or bolt 28, and the high frequency power naturally generated in the conductive metal on the surface of the measurement object 11 is collected from the power collecting terminal 34 through the screw or bolt 28.
The position of the screw or bolt 28 is not limited to the position shown in FIG.

Further, as shown in FIG. 6, an intermediate conductor 15 may be interposed between the conductive metal on the surface of the measurement object 11 and the wireless sensor 10 . A plate-like shape is preferable for the intermediate conductor 15 because it is efficient, but the shape is not limited to a plate-like shape.
Materials such as copper, aluminum, titanium, stainless steel, and iron can be used as the material of the intermediate conductor 15 . However, the intermediate conductor 15 is not limited to these materials. Also, the intermediate conductor 15 can be fixed between the conductor metal on the surface of the object 11 to be measured and a double-faced tape. The method of fixing the intermediate conductor 15 is not limited to double-sided tape. For example, the wireless sensor 10 and the conductive metal on the surface of the measurement object 11 may be fixed with a bolt or the like and fixed by sandwiching between them.
Further, as shown in FIG. 7, the intermediate conductor 15 may be installed at a position away from the wireless sensor 10, and the intermediate conductor 15 and the power collection terminal 26 may be connected via a conductor 38 that can be electrically connected. As a result, the intermediate conductor 15 can be installed at a place where the power collection efficiency is high, such as when vibration is large, and power can be collected.
By providing the intermediate conductor 15, even if the conductive metal on the surface of the measurement object 11 is coated and insulated, power can be generated in the intermediate conductor 15. This makes it possible to obtain power even from an electrically insulated structure such as a metal column.
For this reason, it is preferable that the size of the intermediate conductor 15 is relatively large in terms of efficiency, but a smaller size can also be used.

Further, as shown in FIG. 8, an intermediate member 18 configured by bonding an insulator 22 and a conductor metal 24 together may be arranged between the conductor metal on the surface of the measurement object 11 and the wireless sensor 10 . By providing the intermediate member 18, a capacitor action is formed between the conductive metal on the surface of the measurement object 11 and the wireless sensor 10 and/or between the conductive metal on the surface of the measurement object 11 and the conductive metal 24 of the intermediate member 18, and high-frequency power generated on the surface of the conductive metal can be captured.
Materials such as copper, aluminum, titanium, stainless steel, and iron can be used as the conductor metal 24 .
As the insulator 22, printed wiring board materials such as phenolic resin and epoxy resin can be used, but the material is not limited to these, and other resins or insulating materials other than resins may be used.
It is preferable that the size of the intermediate member 18 is relatively large in terms of efficiency, but a smaller size can also be used.

With the wireless sensor 10 of the present invention, as a result of obtaining a sufficient amount of power, it is also possible to increase the types and number of sensors that can be used.
In addition, by using naturally generated power, the wireless sensor can be activated without requiring large electromotive force transmission from the reader equipment. As a result, even when a large number of sensors, such as several thousand, are managed by multiple reader equipment in a factory, they can be used safely while solving the conventional problem of the possibility of radio interference.

Furthermore, as shown in FIG. 9, when the wireless sensor 10 is attached to the conductor metal on the surface of the object 11 to be measured, a plurality of wireless sensors can be attached to one conductor metal.
By attaching a plurality of wireless sensors 10 to one conductor metal of the object 11 to be measured in this way, it becomes possible to perform detailed sensing, especially in large-scale equipment, facilities, production lines, and the like.

10 Naturally-generated wireless sensor (wireless sensor)
11 Measurement object 15 Intermediate conductor 18 Intermediate member 20 Sensor part 22 Insulator 24 Conductor metal 25 Adhesive tape or adhesive 26 Power collection terminal 28 Screw or bolt 30 Control part 33 Screw or bolt head 34 Power collection terminal 35 Through hole 38 Lead wire 40 Transceiver part 50 Power supply part 52 AC/DC converter 54 DC/DC converter 56 Power storage part

Claims (10)

A self-powered wireless sensor attached to an object to be measured whose surface is a conductor such as metal,
Equipped with a power supply unit that collects and uses high-frequency power that is naturally generated by electromagnetic induction with the surrounding electric field and magnetic field in a vibrating measurement object whose surface is a conductor such as metal,
An adhesive tape or adhesive is attached or applied to a part of the surface to be attached to the object to be measured, and a power collecting terminal electrically connected to the surface of the object to be measured is provided in a part where the adhesive tape or adhesive is not present. A self-powered wireless sensor attached to an object to be measured whose surface is a conductor such as metal,
Equipped with a power supply unit that collects and uses high-frequency power that is naturally generated by electromagnetic induction with the surrounding electric field and magnetic field in a vibrating measurement object whose surface is a conductor such as metal,
A self-powered wireless sensor characterized by having a through hole through which a screw or bolt for fixing to the object to be measured penetrates from the upper surface toward the mounting surface to the object to be measured, and a power collecting terminal for collecting high-frequency power through the screw or bolt at a position in contact with the lower surface of the head of the screw or bolt. 3. The natural power generation wireless sensor according to claim 1 or claim 2, wherein an intermediate conductor that generates high-frequency power is provided between the surface of the object to be measured whose surface is a conductor such as a metal and is further coated and the mounting surface to the object to be measured. The power supply unit
The naturally occurring wireless sensor according to any one of claims 1 to 3, wherein the surface is a conductor such as a metal, and has a function of rectifying high-frequency power that is naturally generated by electromagnetic induction with the surrounding electric field and magnetic field in a vibrating measurement object. The power supply unit
The spontaneously generated wireless sensor according to any one of claims 1 to 4 , wherein the surface is a conductor such as a metal, and has a function of voltage-controlling high-frequency power that is naturally generated by electromagnetic induction with the surrounding electric field and magnetic field in a vibrating object to be measured. The power supply unit
The naturally occurring wireless sensor according to any one of claims 1 to 5 , wherein the surface is a conductor such as a metal, and has a function of storing high-frequency power that is naturally generated by electromagnetic induction with the surrounding electric field and magnetic field in a vibrating measurement object. a sensor unit that acquires the state of an object to be measured;
a transmitting/receiving unit that externally communicates data obtained by the sensor unit;
The power supply unit
The spontaneously-generated wireless sensor according to any one of claims 1 to 6 , wherein the surface of the object to be measured is a conductor such as a metal, and in which high-frequency power that is naturally generated by electromagnetic induction with the surrounding electric field and magnetic field is collected in a vibrating object to be measured, and the collected high-frequency power is supplied to the sensor unit and the transmitting/receiving unit. a sensor unit that acquires the state of the object to be measured;
a control unit that performs calculation of data obtained by the sensor unit and overall operation management;
a transmitting/receiving unit that externally communicates data obtained by the sensor unit;
The power supply unit
The spontaneously-generated wireless sensor according to any one of claims 1 to 7 , wherein the surface of the object to be measured is a conductor such as a metal, and the naturally generated high-frequency power is collected by electromagnetic induction with the surrounding electric field and magnetic field in a vibrating measurement object, and the collected high-frequency power is supplied to the sensor unit, the transmitting/receiving unit, and the control unit. The control unit or the transmission/reception unit,
9. The natural power generation wireless sensor according to claim 8, wherein the data obtained by said sensor unit is managed by an individual identification ID. The control unit
10. The naturally-generated wireless sensor according to claim 8, wherein data obtained by said sensor unit is digitized.

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