JP7453878B2 - Physical quantity measurement system - Google Patents

Description

The present invention relates to a physical quantity measuring system, and in particular, the present invention includes a tag device in which physical quantity information detected by a sensor unit is stored, and a mobile information terminal device that reads the physical quantity information stored in the tag device by wireless communication. The present invention relates to a physical quantity measurement system constructed.

There are many problems described below when measuring physical quantities such as strain, displacement, acceleration, and temperature at the site of infrastructure structures such as tunnels and bridges.
For example, there is a lot of equipment such as measuring instruments and batteries, and it takes a lot of effort and time to transport these to and from the measurement site.
In addition, the above problems can be solved by constantly installing measuring equipment such as monitoring equipment at the site, but the batteries installed cannot withstand long-term use due to spontaneous discharge. There's a problem.
There are examples of using solar panels instead of batteries, but there are restrictions on where they can be installed, and there is a problem that, for example, measurements cannot be taken inside tunnels that are not exposed to direct sunlight or at night.

In addition, when taking measurements, a measurement worker goes to the measurement site with a dedicated measuring device, connects the sensor cable and the dedicated measuring device, takes measurements, and records the connected sensor label and measured value in a memo pad. There is a hassle of having to do this.
As described above, when writing down sensor labels and measured values used during measurement as memos, there is a problem that the values are not continuous and are difficult to understand intuitively.

By the way, as conventional techniques related to the above-mentioned problem, Patent Document 1 (Japanese Patent Laid-Open No. 2008-145403) and Patent Document 2 (Japanese Patent Laid-Open No. 2011-179817) are known.
For example, Patent Document 1 aims to enable non-destructive and non-contact measurement of strain occurring in buildings, etc., and specifically describes an IC tag embedded inside a structural member of a building. and a readout device that reads information from the IC tag, the IC tag includes a sensor for detecting strain in a portion of a structural member in which the IC tag is embedded, and a sensor that wirelessly transmits the output signal of the sensor. The reading device is equipped with a receiving circuit that receives a signal transmitted from the IC tag, and the reading device is equipped with a receiving circuit that receives a signal transmitted from the IC tag. The antenna is configured to include an antenna for generating electric power.

Furthermore, in Patent Document 2, in order to achieve the purpose of providing a highly sensitive strain measurement system while wirelessly monitoring strain occurring in a structure, a strain sensor is attached to a metal plate and a strain sensor is attached to the structure. The strain information of the structure from the metal plate attached with rivets and the strain sensor is transmitted by wireless communication via RFID tag. It must be made of iron with a certain size and a thickness of 0.08 mm or more and 2 mm or less, and uses a passive RFID that is driven by radio waves from a reader/writer for wireless communication, and is used as a bridge circuit for strain measurement. After canceling the resistance of the strain gauge using a variable resistor in advance, the RFID tag is coated with a resin, and the resin coat is covered with a soft resin material such as silicone rubber or butyl rubber, and then coated with epoxy resin. A strain measuring device for a structure characterized by being formed by pouring and molding is described.

Japanese Patent Application Publication No. 2008-145403 Japanese Patent Application Publication No. 2011-179817

In both of the measurement systems disclosed in Patent Documents 1 and 2, strain information is read and recorded using an external reading/recording device (reader/writer) using a wireless communication system called RFID.
However, the following problems remain in the reading/recording devices of any of the above measurement systems.
As a first issue, Patent Documents 1 and 2 describe strain measurement systems that transfer information from an information reading/recording device (reader/writer) to a personal computer. The problem is that it takes a lot of time and effort to bring in equipment such as power supplies and equipment.

In addition, as a second issue, in both Patent Documents 1 and 2, the information reading/recording device (reader/writer) performs calculations and records based on information obtained from the strain sensor tag (RF tag). However, the problem is that it cannot perform functions such as recording and analyzing various types of information related to measurement, such as special measurement conditions, measurement location information, measurement time information, and a wide variety of other information. is left behind.
Additionally, the third problem with any of the above measurement systems is that, without a computer, there is a limit to the storage capacity of the reader/writer alone. .
The fourth issue is that in any of the above measurement systems, the strain sensor tag (RF tag) is integrated with the sensor, so it must be installed in high places where the information reading/recording device (reader/writer) cannot be held over. The problem is that it is difficult.
A fifth problem is that constructing a measurement system that can solve all of the first to fourth problems above requires a considerable amount of cost.

The present invention has been made in view of the above-mentioned problems, and its first purpose is to eliminate the need to bring large measuring equipment such as a personal computer to measurement sites such as tunnels and bridges, and to be lightweight and economical. The purpose of the present invention is to provide a space-saving, portable physical quantity measurement system.
The second objective is to provide a physical quantity measuring system that can record a wide variety of information regarding measurements.
A third objective is to provide a physical quantity measuring system that allows conversion into physical quantities by increasing the storage capacity of a portable information terminal device.
The fourth objective is to eliminate restrictions on installation locations and provide a measurement system in which measurement locations are not limited.
The fifth objective is to provide a relatively inexpensive physical quantity measuring system while achieving the first to fourth objectives above.

In order to achieve the above first to fifth objects, the physical quantity measuring system of the present invention according to claim 1 includes: a first communication terminal including a tag device in which physical quantity information detected by a sensor unit is stored; A physical quantity measurement system comprising: a second communication terminal including a mobile information terminal device that reads physical quantity information stored in the tag device by wireless communication;
The tag device includes:
a measurement circuit that appropriately amplifies and performs arithmetic processing on information from the sensor unit;
a first storage unit that sequentially stores measurement value information from the measurement circuit and stores at least a unique ID, an initial value, a calibration coefficient, measurement time information, and position information of the tag device;
a first control unit that controls the measurement circuit and the first storage unit;
a first communication unit that transmits the measurement value information as a proximity wireless signal in response to a request from the mobile information terminal device;
an inductive power receiving unit that receives inductive power emitted from the mobile information terminal device;
It has
The mobile information terminal device includes:
In addition to being equipped with mobile phone functions and mobile information terminal functions ,
a second communication unit capable of communicating with the first communication unit without contacting the tag device;
an operation display unit that controls input/output and image display of the mobile information terminal device;
a second control unit that controls the operation display unit and processes information obtained from the tag device;
a second storage unit that stores information processed by the second control unit;
It has
Further, an inductive power transmitting unit is provided integrally with the portable information terminal device as the second communication terminal and performs inductive power feeding to the inductive power receiving unit on the tag device side,
The inductive power transmission section is provided in a convex portion provided in a casing of the mobile information terminal device, and the inductive power receiving portion is provided in a concave portion provided in a casing of the tag device,
When the convex portion of the mobile information terminal device is fitted into contact with the concave portion of the tag device, the second communication unit of the mobile information terminal device and the first communication unit of the tag device are connected. are arranged so that they are in corresponding positions,
By fitting and abutting the convex portion of the mobile information terminal device with the concave portion of the tag device, power is supplied to the tag device side and detection is performed by the tag device side through non-contact communication. The present invention is characterized in that it is configured to stably transmit measurement value information to the portable information terminal device side.

In the physical quantity measuring system of the invention according to claim 2, the inductive power receiving unit in the tag device includes a power receiving antenna and a first RF circuit, and the inductive power transmitting unit attached to the mobile information terminal device transmits power. A power signal sent from an antenna by inductive power feeding is received by the power receiving antenna, and the first RF circuit demodulates the power signal so that it can be used as a power source according to a predetermined standard, and supplies power to the power source circuit. It is characterized by its composition.

In the physical quantity measuring system of the invention according to claim 3, the inductive power transmission unit attached to the mobile information terminal device includes a battery and a second RF circuit that converts the current supplied from the battery into a high frequency signal, The mobile information terminal device and the inductive power transmission unit integrated therewith are configured to include a power transmission antenna that receives a high frequency signal and supplies power to the power reception antenna, and are capable of close proximity wireless communication with the tag device. When within the range, the power transmission antenna automatically starts power transmission, and the second communication unit automatically starts communication,
On the other hand, when the tag device moves out of the range where close proximity wireless communication is possible, the power transmission antenna automatically ends power transmission, and the second communication unit automatically ends communication. It is characterized by being configured to do so.

In the physical quantity measurement system of the invention according to claim 4, the sensor power supply circuit provided in the tag device smoothes the power demodulated by the first RF circuit and includes a strain gauge type transducer or a strain gauge. It is characterized in that it is configured to supply a bridge voltage consisting of a direct current to a Wheatstone bridge circuit formed by.
The sensor unit in the physical quantity measuring system of the invention according to claim 5 is any one of a strain gauge that detects the physical quantity of the object to be measured, a strain gauge transducer including the strain gauge, a voltage output sensor, and a temperature sensor. It is characterized by being configured to include a sensor consisting of.

The mobile information terminal device in the physical quantity measurement system of the invention according to claim 6 includes: a position information acquisition unit that is controlled by a second control unit and acquires current position information; and a time information acquisition unit that acquires current time. , further having
The second control unit associates the measurement value information transmitted from the tag device with measurement time information and GPS position information acquired from the time information acquisition unit and the position information acquisition unit, and displays the resultant information on the operation display unit. It is characterized by being configured so that it can be displayed.

In the physical quantity measuring system of the invention according to claim 7 , the information recorded in the second storage unit can be stored on a cloud server using a mobile information terminal line of the mobile information terminal device. It is characterized by its composition.
The tag device and the sensor unit in the physical quantity measuring system of the present invention are preferably covered with waterproof means.

According to the invention described in claim 1, there is provided a first communication terminal including a tag device in which physical quantity information detected by a sensor unit is stored, and a mobile information device that reads physical quantity information stored in the tag device by wireless communication. A physical quantity measurement system comprising a second communication terminal including a terminal device,
The tag device includes:
a measurement circuit that appropriately amplifies and performs arithmetic processing on information from the sensor unit;
a first storage unit that stores measurement value information from the measurement circuit and also stores at least a unique ID, an initial value, a calibration coefficient, measurement, time information, and position information of the tag device;
a first control unit that controls the measurement circuit and the storage unit;
a first communication unit that transmits the measurement value information as a proximity wireless signal in response to a request from the mobile information terminal device;
an inductive power receiving unit that receives inductive power emitted from the mobile information terminal device;
It has
The mobile information terminal device includes:
In addition to being equipped with mobile phone functions and mobile information terminal functions ,
a second communication unit capable of communicating with the first communication unit without contacting the tag device;
an operation display unit that controls input/output and image display of the mobile information terminal device;
a second control unit that controls the operation display unit and processes information obtained from the tag device;
a second storage unit that stores information processed by the second control unit;
It has
Further, an inductive power transmitting unit is provided integrally with the portable information terminal device and performs inductive power feeding to the inductive power receiving unit on the tag device side,
The inductive power feeding power transmitting section is provided in a convex portion provided in a casing of the mobile information terminal device, and the inductive power receiving portion is provided in a concave portion provided in a casing of the tag device,
When the convex portion of the mobile information terminal device is fitted into the concave portion of the tag device, the second communication unit of the mobile information terminal device and the first communication unit of the tag device are connected. are arranged so that they are in corresponding positions,
By fitting and abutting the convex portion of the mobile information terminal device with the concave portion of the tag device , power is supplied to the tag device side through non-contact communication, and detection is performed on the tag device side. By configuring the system to stably transmit measurement value information to the mobile information terminal device,
Firstly, by making the measuring equipment lightweight and compact, it is extremely easy to transport and install it to the measurement site, and secondly, it is possible to perform various analyzes based on a wide variety of information. Thirdly, the storage content and storage capacity of the portable information terminal device can be significantly increased.Fourthly, there are no restrictions on the installation location and the measurement location is not limited.Fifthly, It is possible to provide a physical quantity measurement system that can stably transmit measurement value information detected by a tag device to a mobile information terminal device side while obtaining the above effects, and is relatively inexpensive compared to conventional devices. can.

1 is a block diagram showing the overall configuration of a physical quantity measuring system according to a first embodiment of the present invention. 2 is a flowchart showing time-series processing of a first communication terminal and a second communication terminal in the physical quantity measurement system shown in FIG. 1. FIG. FIG. 2 is a front view showing an example of the display form of the operation display section of the portable information terminal device in the physical quantity measurement system shown in FIG. 1; FIG. 2 is a perspective view showing the external configuration of a tag device and a sensor unit that constitute a first communication terminal of the physical quantity measurement system according to the present invention, viewed from the front side. FIG. 2 is a perspective view showing the external configuration of a portable information terminal device and an inductive power transmission section, which constitute a second communication terminal of the physical quantity measurement system according to the present invention, as viewed from the front side.

Hereinafter, the present invention will be explained through embodiments of the present invention, but the following embodiments do not limit the claimed invention, and the combinations of features described in the embodiments are not limited to the following embodiments. Not all of them are essential to the solution of the invention.
[First embodiment]

Next, embodiments of the physical quantity measuring system according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing the overall configuration of a physical quantity measuring system according to a first embodiment of the present invention.
The physical quantity measurement system of this embodiment includes a tag device 110 and a sensor unit 140 that constitute a first communication terminal 100, and a mobile information terminal device and an inductive power transmission section 220 that constitute a second communication terminal 200.
Among these, the mobile information terminal device 210 is an information processing device that can be carried and used by a user, and includes, for example, a mobile communication terminal such as a smartphone or a mobile phone, or a slate terminal such as a PDA (Personal Digital Assistant). etc. are included in this category. Among such portable information terminal devices, smartphones are suitable for implementing the present invention because they are small and have a wide range of performance. Note that a smartphone is a general term for mobile phones equipped with a mobile operating system.

Therefore, in the following explanation, the portable information terminal device is replaced with a smartphone, which is a representative example thereof.
First, the first communication terminal 100 will be explained.
Of the tag device 110 and sensor unit 140 that constitute the first communication terminal 100, the sensor unit 140 is configured such that, for example, an accelerometer, which is one of the sensors, is housed inside the casing of the tag device 110. In this case, it is integrated with the tag device 110, but strain gauges, displacement transducers, pressure transducers, torque transducers, load transducers, etc. installed directly on the object to be measured are separate from the tag device 110. The two will be connected via a connection cable 141.

In FIG. 1, of the first communication terminal 100, the tag device 110 includes an inductive power receiving section 120, a power supply circuit 111, a sensor power supply circuit 116, a measurement circuit 115, a first control section 113, a first The storage unit 114 includes a storage unit 114 and a first communication unit 112.
The inductive power receiving unit 120 includes a power receiving antenna 123 and a first RF (Radio Frequency) circuit 122, and the power receiving antenna 123 receives inductive power from a power transmitting antenna 223 of an inductive power transmitting unit 220, which will be described later. Receive power.
As an inductive power supply technology, there is an international standard called Qi, which can transmit power through a non-metallic shield of about 10 mm, so that power can be supplied without contact.
Since the power received by the power receiving antenna 123 is modulated according to the Qi standard, the first RF circuit 122 of the inductive power receiving unit 120 rectifies the high frequency signal so that it can be used as a power source, and supplies the power to the next tag device. Power is supplied to circuit 111.

The power supply circuit 111 converts the voltage of the power received from the first RF circuit into a required voltage using a DC/DC converter, and connects each part of the internal circuit of the tag device 110, that is, the first control unit 113, and the measurement circuit. 115, etc., respectively.
The sensor power supply circuit 116 adjusts the voltage received from the power supply circuit 111 and supplies sensor power to the sensor unit 140.
The sensor unit 140 may be used not only as a strain gauge, but also as a variety of transducers using strain gauges, such as a displacement transducer, an acceleration transducer, a pressure transducer, a torque transducer, a load transducer, etc. It will be done.
When using a strain gauge, the configuration differs depending on the 1-gauge method 2-wire mode, 1-gauge method 3-wire mode, 2-gauge method mode, full bridge mode, etc., but it is built into a Wheatstone bridge and has a bridge power supply at its input end. (BV) is applied.

Furthermore, when the sensor is a temperature sensor or a voltage output sensor, a Wheatstone bridge is not assembled and a separate circuit is constructed.
In this way, the sensor unit 140 includes an input/output component including a sensor.
The measurement circuit 115 includes an amplifier circuit (not shown) that receives the output of the sensor unit 140 as a voltage signal based on a change in the resistance value of a strain gauge from the output end of a Wheatstone bridge, and amplifies it, or amplifies the output from the amplifier circuit. It has the function of an A/D conversion circuit (not shown) that quantizes the received measurement value (analog signal) and converts it into a digital signal.
The first control unit 113 is composed of, for example, an MCU (Memory Control Unit), and controls the built-in memory, and receives a measurement value (measured value) made of, for example, a digital signal, from the measurement circuit 115. is written in the first storage unit 114, and is further controlled to be transmitted to a second control unit 213 of the smartphone 210, which will be described later, via the first communication unit 112 and the second communication unit 212.

Furthermore, the first control unit 113 uses a filter to remove noise from the measured value consisting of the digital signal received from the measurement circuit 115, and determines whether the measured value after applying the filter is within a normal range. do. If it is within the measurement range, it is determined that the measurement was performed normally, and the measurement value information is written into the first storage unit 114, which is made of, for example, an EEPROM as a non-luminescent memory.
If the measurement is performed normally, the first control unit 113 measures, for example, six times, removes the maximum value and the minimum value, and calculates the average value based on the intermediate four measured values. It is configured to calculate and write the result to the first storage unit 114.
If the measured value is abnormal, a quantization request is issued to the measurement circuit 115 again, and the measured value is received again.
This operation is repeated, but it is measured by a built-in timer, and if the measured value is abnormal even after a certain period of time (for example, about 10 seconds, but not limited to), the measurement is stopped. do.

The measurement value information output from the first control section 113 is written to the first storage section 114 and is transmitted from the first communication section 112 to the second communication section 212 of the smartphone 210.
The first storage unit 114 sequentially stores measurement value information from the first control unit 113, and at least the unique ID of the tag device 110, initial values, calibration coefficients, measurement time information, position information, etc. is memorized.
Next, the second communication terminal 200 will be explained with reference to FIG. 1.
The second communication terminal 200 includes a smartphone 210 and an inductive power transmitting unit 220 that is integrally attached to the smartphone 210 and performs inductive power supply to the inductive power receiving unit 120 on the tag device 110 side. .

The smartphone 210 includes an operation display section 211, a second communication section 212, a second control section 213, a second storage section 214, a time information acquisition section 215, and a location information acquisition section 216. has been done.
The inductive power transmission unit 220 includes a battery 221, a second RF circuit 222, and a power transmission antenna 223.
The operation/display unit 211 is generally composed of a liquid crystal touch panel, and has a so-called input/display function in which necessary information is input by touching the liquid crystal screen with a fingertip, touch pen, etc., and information corresponding to the operation result is displayed. It is a device that combines two functions.

In the present invention, as shown in the front view of FIG. 3, the operation display section 211 displays measurement date and time, measurement value, sensor ID, sensor information, installation location, location information (latitude, longitude), etc. However, the present invention is not limited thereto, and may have a function of displaying operation information for realizing existing functions such as a mobile phone function and a mobile information terminal function.
The second communication unit 212 receives information wirelessly from the first communication unit 112 based on, for example, a near field communication standard called NFC (Near Field Communication).
When using the above-mentioned standard called NFC, close proximity communication is possible within a range of about 10 mm, and when the smartphone 210 of the second communication terminal 200 is held over (brings close to) the tag device 110 of the first communication terminal 100, , the second communication unit 212 and the first communication unit 112 operate to automatically start close proximity wireless communication.

The second control section 213 reads information such as measured values from the first storage section 114 via the first communication section 112 and the second communication section 212 sequentially, and writes the information to the second storage section 214. In addition to executing the above operations, the second control unit 213 also acquires the current time (measurement time) from the time information acquisition unit 215, acquires position information from the position information acquisition unit 216 consisting of GPS, Both are written to the second storage unit 214.
The inductive power transmission unit 220 that constitutes the second communication terminal includes a battery 221, a second RF circuit 222, and a power transmission antenna 223. Then, the current supplied from the battery 221 is converted into a high frequency signal of, for example, 110 KHz to 205 KHz in the second RF circuit 222, and power is transmitted from the power transmitting antenna 223 by inductive power feeding. There is.

FIG. 4 is a perspective view showing the external configuration of a tag device and a sensor unit that constitute the first communication terminal of the physical quantity measurement system according to the present invention, as viewed diagonally from the front.
In FIG. 4, the tag device 110 is housed inside a housing 110A having a vertically long and relatively thin rectangular shape. In the lower half of the housing 110A, a concave portion 110B consisting of an asymmetrical octagonal groove is formed.
The base end of a connection cable 141 is connected to the upper end of the housing 110A of the tag device 110, and the distal end of the connection cable 141 is connected to the sensor unit 140 (in this embodiment, a displacement transducer is exemplified). )It is connected to the.
In addition, in FIG. 4, the triple circle portion indicated by a broken line in the upper half of the casing 110A corresponds to the location where the first communication unit 112 is disposed, and the five-fold circle portion indicated by a broken line in the lower half of the casing 110A. indicates that it corresponds to the power receiving antenna 123 of the inductive power receiving unit 120.

FIG. 5 is a perspective view showing an external configuration of a smartphone as a portable information terminal device constituting a second communication terminal of the physical quantity measuring system according to the present invention, and an inductive power feeding transmitting unit, as viewed obliquely from the rear side.
In FIG. 5 , an inductive power feeding transmitting unit 220 is integrally provided on the rear side of a housing 210A of a smartphone 210 constituting the second communication terminal 200.
Specifically, a housing 220A of the inductive power feeding transmission unit 220 is provided to protrude slightly downward from the rear side of a housing 210A of the smartphone 210.
The housing 220A has two convex portions 220B and 220C that protrude a predetermined distance and are connected to each other.
Of the two convex portions 220B and 220C, the upper convex portion 220B has a similar shape to but is slightly smaller than the concave portion 110B of the tag device 110 in FIG. 4 described above, and is formed so as to be able to fit into said concave portion 110B.

In FIG. 5, the triple circle portion shown by a broken line near the upper end of the housing 210A of the smartphone 210 corresponds to the location where the second communication unit 212 is disposed, and the upper side of the housing 220A of the inductive power transmission unit 220 A five-fold circle indicated by a broken line in the center of the convex portion 220B corresponds to the power transmission antenna 223 of the inductive power transmission section 220.
Although the case 210A of the smartphone 210 and the case 220A of the inductive power transmission unit 220 have been described as separate bodies, they may be formed as an integrated case.
Next, the operation of the physical quantity measuring system according to the first embodiment of the present invention will be explained with reference to the flowchart shown in FIG.

In FIG. 2, first, when the smartphone 210 is powered on, the OS starts up (step S301), and the second communication unit 212 operates based on the NFC standard to prepare for operation (step S302). Thereafter, the device shifts to a normal use state in which close proximity wireless communication is possible (step S303).
On the other hand, when the power of the inductive power transmission section 220 is turned on in parallel with this (step S401), the current supplied from the battery 221 is converted into a high frequency signal of, for example, 110 KHz to 205 KHz in the second RF circuit 222. It is converted and preparations are made to supply power (step S402), and the inductive power transmission unit 220 enters a standby state (step S403).
Therefore, when the smartphone 210 of the second communication terminal 200 is approached (held over) the tag device 110 together with the inductive power transmitting unit 220, the upper convex shape provided on the casing 220A of the inductive power transmitting unit 220 shown in FIG. The portion 220B is fitted into a concave portion 110B formed in the housing 110A of the tag device 110 shown in FIG.

Then, power is supplied from the power transmitting antenna 223 of the inductive power transmitting unit 220 to the power receiving antenna 123 of the inductive power receiving unit 120 (step S404). As a result, the inductive power receiving unit 120 receives power (step S501) and starts operating (step S502). In the inductive power receiving unit 120, the first RF circuit 122 rectifies the high frequency signal (step S503) and supplies power to the power supply circuit 111 (step S504).
The power supply circuit 111 of the tag device 110 that received the power starts up (step S651), supplies power to the first control unit 113 side (step S601), and supplies power to the sensor power supply circuit 116 (step S601). Step S701).
Upon receiving power supply from the power supply circuit 111, the first control unit 113 starts up (step S601), and the first control unit 113 saves the previous measurement information stored in the first storage unit 114 to the first control unit 113. is transmitted to the second communication unit 212 of the smartphone 210 via the communication unit 112 of the smartphone 210 (step S602).

The previous measurement information includes information regarding the sensor, such as a unique ID, initial value, calibration coefficient, and previous measurement value.
After transmitting the previous measurement information, the first control unit 113 of the tag device 110 performs measurement pre-processing in the first storage unit 114 (for example, amplifier gain setting of the first control unit 113, A/D conversion). Startup preparations such as setting the sampling time constant of the device are performed (step S603).
On the other hand, the second control unit 213 of the smartphone 210 receives and reads the previous measurement information stored in the first storage unit 114 via the first communication unit 112 and the second communication unit 212. (Step S304).
Further, the second control unit 213 of the smartphone 210 acquires GPS position information from the position information acquisition unit 216 and writes it into the second storage unit 214 (step S305).

In parallel with the operations of steps S602, S603, S304, and S305 described above, the sensor power supply circuit 116 of the tag device 110 converts the power supplied from the power supply circuit 111 into a voltage suitable for the sensor unit 140. For example, if the sensor unit 140 is a strain gauge type transducer and a bridge circuit is formed, a predetermined bridge voltage is applied to the input terminal of the bridge circuit (step S701).
Then, the voltage output from the sensor unit 140 is A/D converted by the measurement circuit 115 and sent to the first control section 113 (step S702).
The first control unit 113 of the tag device 110 writes the measurement value obtained from the measurement circuit 115 to the first storage unit 114 (step S604), and writes the measurement value obtained from the measurement circuit 115 to the first storage unit 114 via the first communication unit 112 and the second communication unit 212. The information is transmitted to the second control unit 213 of the smartphone 210 (step S605), and the smartphone 210 enters a sleep state (step S606).

On the other hand, the second control unit 213 of the smartphone 210 reads the information of the measured values from the first storage unit 114 transmitted as described above, and furthermore, the second control unit 213 of the smartphone 210 reads the information of the measured value transmitted from the first storage unit 114 as described above, and furthermore, the second control unit 213 reads the information of the measured value transmitted from the first storage unit 114 as described above, and furthermore, the second control unit 213 reads the information of the measured value transmitted from the first storage unit 114 as described above, and further, the The current time is acquired from the acquisition unit 215 and both are written into the second storage unit 214 (step S306).
Thereafter, the second control unit 213 uses the information written in the second storage unit 214 to perform arithmetic processing on the numerical value to be displayed on the operation display unit 211 (step S307).
The measured value displayed on the operation display section 211 here refers to, for example, a value obtained by subtracting an initial value from a measured value (measured value), or a value converted into a physical quantity (for example, displacement, acceleration, pressure, torque, load, physical quantity values such as voltage and temperature).
Then, the second control unit 213 of the smartphone 210 displays the current time, measurement position information, etc. in addition to the above-mentioned measured values and physical quantity values on the operation display unit 211 (step S308).
FIG. 3 is a diagram simulating the screen displayed on the operation display section 211.

Note that when the power of the inductive power transmission section 220 is turned off (step S405), power transmission to the inductive power reception section 120 is stopped, and the operation of the tag device 110 ends (step S607).
Furthermore, power transmission to the inductive power receiving unit 120 is also stopped by moving the second communication terminal 200 away from the tag device 110 by a predetermined distance or more.
Further, communication between the second communication unit 212 of the smartphone 210 and the first communication unit 112 of the tag device 110 is similarly stopped by separating the smartphone 210 from the tag device 110 by a predetermined distance or more.
The gist of the physical quantity measuring system according to the present invention is summarized as follows.

The physical quantity measuring system according to the present invention includes a first communication terminal 100 including a tag device 110 in which physical quantity information detected by a sensor unit 140 is stored, and a first communication terminal 100 that reads the physical quantity information stored in the tag device 110 by wireless communication. The second communication terminal 200 includes a mobile information terminal device (also referred to as a smartphone) 210.
The tag device 110 then includes:
a measurement circuit 115 that appropriately amplifies and processes information from the sensor unit 140;
a first storage unit 114 that sequentially stores measurement value information from the measurement circuit 115 and stores at least a unique ID, initial value, calibration coefficient, measurement, measurement time information, and position information of the tag device 110;
a first control unit 113 that controls the measurement circuit 115 and the first storage unit 114;
a first communication unit 112 that transmits the measurement value information as a proximity wireless signal in response to a request from the mobile information terminal device 210;
an inductive power receiving unit 120 that receives inductive power emitted from the mobile information terminal device 210 side;
I have it.

Then, the mobile information terminal device 210
In addition to being equipped with mobile phone functions and mobile information terminal functions ,
a second communication unit 212 capable of communicating with the first communication unit 112 without contacting the tag device 110;
an operation display unit 211 that controls input/output and image display of the mobile information terminal device 210;
a second control unit 213 that controls the operation display unit 211 and processes information obtained from the tag device 110;
a second storage unit 214 that stores information processed by the second control unit 213;
It has
Furthermore, an inductive power transmitting section 220 is provided which is integrally attached to the portable information terminal device 210 as the second communication terminal 200 and performs inductive power feeding to the inductive power receiving section 120 on the tag device 110 side. the law of nature,
Further, the inductive power transmission unit 220 is provided in a convex portion 220B provided in the casing 210A of the mobile information terminal device 210, and the inductive power transmission portion 220 is provided in the concave portion 110B provided in the casing 110A of the tag device 110. A power receiving unit 120 is provided,
When the convex portion 220B of the mobile information terminal device 210 is fitted into the concave portion 110B of the tag device 110, the second communication unit 212 of the mobile information terminal device 210 and the tag device 110 are connected to each other. The first communication unit 112 is arranged at a corresponding position.

By fitting and abutting the convex portion 220B of the mobile information terminal device 210 configured as described above into the concave portion 110B of the tag device 110, the tag device 110 side can be connected to the tag device 110 side through non-contact communication. It is characterized in that it is configured to supply power and stably transmit measurement value information detected on the tag device 110 side to the mobile information terminal device 210 side (corresponding to claim 1).
By configuring as above,
Firstly, by making the measuring equipment lightweight and compact, it is extremely easy to transport and install it to the measurement site, and secondly, it is possible to perform various analyzes based on a wide variety of information. Thirdly, the storage content and storage capacity of the portable information terminal device can be significantly increased.Fourthly, there are no restrictions on the installation location and the measurement location is not limited.Fifthly, While obtaining the above effects, it is possible to provide a physical quantity measuring system that is relatively inexpensive compared to conventional devices.

The inductive power receiving section 120 in the tag device 110 includes a power receiving antenna 123 and a first RF circuit 122, and the inductive power receiving section 120 of the inductive power transmitting section 220 attached to the mobile information terminal device (smartphone 210) includes a power receiving antenna 123 and a first RF circuit 122. The power receiving antenna 123 receives a power signal sent from 223 by inductive power feeding, demodulates the power signal in the first RF circuit 122 so that it can be used as a power source according to a predetermined standard, and supplies the power to the power supply circuit 111. The present invention is characterized in that it is configured to supply (corresponding to claim 2).
With this configuration, there is no need to incorporate a battery that naturally discharges inside the tag device 110, and the trouble of replacing the battery can be eliminated. This has the advantage of not requiring the use of solar panels, which would have limited measurements.

The inductive power transmission section 220 attached to the mobile information terminal device (smartphone 210) includes a battery 221, a second RF circuit 222 that converts the current supplied from the battery 221 into a high frequency signal, and a second RF circuit 222 that converts the high frequency signal into a high frequency signal. The mobile information terminal device 210 and the inductive power transmission unit 220 integrated therewith are connected to the tag device 110 by close proximity wireless communication. If it is within a possible range, the power transmission antenna 223 automatically starts power transmission, and the second communication unit 212 automatically starts communication,
On the other hand, when the tag device 110 moves (separates) from the range where close proximity wireless communication is possible, the power transmission antenna 223 automatically ends power transmission, and the second communication unit 212 The present invention is characterized in that the communication is configured to automatically end (corresponding to claim 3).

With this configuration, transmission of power from the inductive power transmitting unit 220 to the inductive power receiving unit 120 and communication between the second communication unit 212 and the first communication unit 112 can be performed with the smartphone 210. , and the tag device 110 can be started at the same time by simply approaching them, and can be terminated at the same time by simply moving them apart, which greatly simplifies the operation.
Further, the sensor power supply circuit 116 provided in the tag device 110 smoothes the power demodulated by the first RF circuit 122, and generates a Wheatstone bridge circuit formed by a strain gauge type transducer or including a strain gauge. (corresponding to claim 4).
With this configuration, a predetermined bridge voltage can be supplied to at least the input end of the bridge circuit including the strain gauge type transducer and strain gauge forming the bridge circuit as the sensor unit 140, A voltage signal based on a change in the resistance value of the strain gauge can be extracted from the output end of the bridge circuit.

Further, the sensor unit 140 is configured to include a strain gauge that detects a physical quantity of the object to be measured, a strain gauge transducer including the strain gauge, a voltage output sensor, or a temperature sensor. (corresponding to claim 5).
The sensor unit 140 is not limited to a strain gauge type transducer in which a bridge circuit is formed by including a strain gauge, but a wide variety of sensors such as a voltage output sensor and a temperature sensor without a bridge circuit can be used.
The mobile information terminal device 210 further includes a location information acquisition unit 216 that is controlled by the second control unit 213 and acquires current location information, and a time information acquisition unit 215 that acquires the current time,
The second control unit 213 links the measurement value information transmitted from the tag device 110 with the current time information and GPS position information acquired from the time information acquisition unit 215 and the position information acquisition unit 216, and It is characterized in that it is configured so that it can be displayed on the operation display section 211 (corresponding to claim 6).
With this configuration, in addition to measurement value information, a wide variety of information such as measurement time information and measurement position information can be obtained, and compared to the conventional recording method using notes, etc., it is possible to obtain more accurate information. can be obtained simultaneously and easily, which is extremely convenient for various analyses.

Further, the information recorded in the second storage unit 214 of the mobile information terminal device 210 may be stored on a cloud server using the mobile information terminal line of the mobile information terminal device 210. (corresponding to claim 7).
In this way, by using a cloud server, as long as there is an Internet environment, initial costs such as equipment costs can be kept low, and the storage is highly expandable, so it is possible to increase a huge amount of storage capacity in a wide variety of ways. be able to.
Further, it is preferable that the tag device 110 and the sensor unit 140 are coated with waterproof means and subjected to waterproof treatment.
With this configuration, even if it is raining at the time of measurement, moisture is prevented from entering through the connection portions of the housing 110A of the tag device 110, the sensor unit 140, and the connection cable 141, and the internal configuration is Corrosion of parts and deterioration of electrical system insulation can be prevented, and measurement stability and durability can be improved.

Further, on the back side of the mobile information terminal device 210, a convex portion 220B from which the inductive power transmission section 220 projects by a predetermined amount is formed, and on one surface side of the tag device 110, the inductive power transmission section 220 is formed. A concave portion 110B that can be loosely fitted into the convex portion 220B of the tag device is formed, and when the convex portion 220B is close to or fitted into the concave portion 110B, the tag device can be connected to the tag device through non-contact communication. By supplying power to the tag device 110 side and stably transmitting measurement value information detected by the tag device 110 side to the mobile information terminal device 210 side, the concave portion 110B of the tag device 110 is With a simple operation of fitting and holding the upper convex portion 220B of the inductive power transmitting unit 220 in contact with each other, power can be supplied from the inductive power transmitting unit 220 to the inductive power receiving unit 120 of the tag device 110, and the smartphone 210 and the first communication unit 112 of the tag device 110 is achieved stably, and the distance between the two is kept constant. This is extremely effective in stably transmitting measurement value information to the smartphone 210 side.

100 First communication terminal 110 Tag device 110A Housing 110B Concave portion 111 Power supply circuit 112 First communication unit 113 First control unit 114 First storage unit 115 Measurement circuit 116 Sensor power supply circuit 120 Inductive power receiving unit 122 1 RF circuit 123 Power receiving antenna 140 Sensor unit 141 Connection cable 200 Second communication terminal 210 Smartphone (mobile information terminal device)
210A Housing 211 Operation display unit 212 Second communication unit 213 Second control unit 214 Second storage unit 215 Time information acquisition unit 216 Position information acquisition unit 220 Inductive power transmission unit 220A Housing of induction power supply unit 220B Upper convex shaped portion 220C lower convex portion 221 battery 222 second RF circuit 223 power transmission antenna

Claims (7)

A first communication terminal including a tag device in which physical quantity information detected by a sensor unit is stored, and a second communication terminal including a mobile information terminal device that reads physical quantity information stored in the tag device by wireless communication. A physical quantity measurement system comprising:
The tag device includes:
a measurement circuit that appropriately amplifies and performs arithmetic processing on information from the sensor unit;
a first storage unit that sequentially stores measurement value information from the measurement circuit and stores at least a unique ID, an initial value, a calibration coefficient, measurement time information, and position information of the tag device;
a first control unit that controls the measurement circuit and the first storage unit;
a first communication unit that transmits the measurement value information as a proximity wireless signal in response to a request from the mobile information terminal device;
an inductive power receiving unit that receives inductive power emitted from the mobile information terminal device;
It has
The mobile information terminal device includes:
In addition to being equipped with mobile phone functions and mobile information terminal functions,
a second communication unit capable of communicating with the first communication unit without contacting the tag device;
an operation display unit that controls input/output and image display of the mobile information terminal device;
a second control unit that controls the operation display unit and processes information obtained from the tag device;
a second storage unit that stores information processed by the second control unit;
It has
Further, an inductive power transmission unit is provided integrally with the portable information terminal device as the second communication terminal and performs inductive power supply to the inductive power receiving unit on the tag device side,
The inductive power feeding power transmitting section is provided in a convex portion provided in a casing of the mobile information terminal device, and the inductive power receiving portion is provided in a concave portion provided in a casing of the tag device,
When the convex portion of the mobile information terminal device is fitted into the concave portion of the tag device, the second communication unit of the mobile information terminal device and the first communication unit of the tag device are connected. are arranged so that they are in corresponding positions,
By fitting and abutting the convex portion of the mobile information terminal device with the concave portion of the tag device, power is supplied to the tag device side through non-contact communication, and detection is performed on the tag device side. A physical quantity measuring system, characterized in that it is configured to stably transmit measurement value information to the portable information terminal device side. The inductive power receiving section in the tag device includes a power receiving antenna and a first RF circuit, and receives a power signal sent by inductive power feeding from the power transmitting antenna of the inductive power transmitting section attached to the mobile information terminal device. 2. The power signal is received by a power receiving antenna, the power signal is demodulated by the first RF circuit so that it can be used as a power source according to a predetermined standard, and the power signal is supplied to a power source circuit. Physical quantity measurement system described. The inductive power transmission section attached to the mobile information terminal device includes a battery, a second RF circuit that converts the current supplied from the battery into a high frequency signal, and a second RF circuit that receives the high frequency signal and directs it toward the power receiving antenna. The portable information terminal device and the inductive power transmission unit integrated therewith are configured to include a power transmission antenna that supplies power, and when the tag device is within a range where close proximity wireless communication is possible, the portable information terminal device and the inductive power transmission unit integrated therewith While automatically starting power transmission, the second communication unit automatically starts communication,
On the other hand, when the tag device moves out of the range where close proximity wireless communication is possible, the power transmission antenna automatically ends power transmission, and the second communication unit automatically ends communication. 3. The physical quantity measuring system according to claim 2 , wherein the physical quantity measuring system is configured to do so. The sensor power supply circuit provided in the tag device smoothes the power demodulated by the first RF circuit and supplies direct current to a strain gauge type transducer or a Wheatstone bridge circuit formed including a strain gauge. The physical quantity measuring system according to claim 2 , characterized in that it is configured to supply a bridge voltage. The sensor unit includes a strain gauge that detects the physical quantity of the object to be measured, a strain gauge transducer including the strain gauge, a voltage output sensor, and a temperature sensor. The physical quantity measuring system according to claim 1. The mobile information terminal device further includes a location information acquisition unit that is controlled by the second control unit and acquires current location information, and a time information acquisition unit that acquires current time,
The second control unit associates the measurement value information transmitted from the tag device with the current time information and GPS position information acquired from the time information acquisition unit and the position information acquisition unit, and displays the resultant information on the operation display unit. The physical quantity measuring system according to claim 1, wherein the physical quantity measuring system is configured to be able to display the physical quantity. The physical quantity according to claim 1, wherein the information recorded in the second storage unit is configured to be stored on a cloud server using a mobile information terminal line of the mobile information terminal device. measurement system.

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