JP2001338382A - Measuring instrument and monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring instrument capable of being miniaturized and which can attain its miniaturization and saving the power consumption, and to provide a monitoring system capable of easily collecting the physical quantity. SOLUTION: The information showing the distortion quantity that is measured by a sensor 14 is transmitted as a radio signal to a built-in transmission circuit via a radio transmitter 18 only when the radio signal showing an external radio transmission request is received by a reception circuit that is built into the transmitter 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a measuring device and a monitoring system, and more particularly, to a measuring device for detecting a predetermined physical quantity and a monitoring system to which the measuring device is applied.

[0002]

2. Description of the Related Art Conventionally, as a technique for easily acquiring physical quantities such as temperature and pressure, a measuring device for measuring a physical quantity includes a sensor for detecting a physical quantity, a wireless transmitter, and a wireless transmitter. It is configured integrally with the drive power supply unit,
There is a technique for transmitting information indicating a physical quantity detected by a sensor by a wireless transmitter (Japanese Patent Laid-Open No. 9-2107).
No. 99).

[0003]

However, in the technique described in Japanese Patent Application Laid-Open No. Hei 9-210799, it is necessary to constantly supply power to a radio transmitter that requires relatively large power. There is a problem that it is difficult to reduce the size of the unit (the size of the measuring device) and the power consumption is large.

[0004] That is, for example, when a dry battery is used as the driving power supply unit, it is necessary to use a large-capacity dry battery, and therefore, it is necessary to use a large-sized dry battery.

Therefore, when this measuring device is applied to collect physical quantities at a large number of measuring positions, a large-sized measuring device needs to be installed at each measuring position, which requires a great deal of labor. Will be.

On the contrary, in order to reduce the size of the measuring device,
A method of applying a small driving power supply unit is conceivable. In this case, however, the capacity of the driving power supply unit is reduced, so that the life of the measuring device (measurable period) is shortened, and the measuring device is shortened. Need to be replaced, which also requires a great deal of labor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a measuring device capable of reducing the size and power consumption, and a monitoring system capable of easily collecting physical quantities. The purpose is to provide.

[0008]

According to a first aspect of the present invention, there is provided a measuring apparatus, comprising: a sensor for detecting a predetermined physical quantity and outputting it as a detection signal; a power supply for outputting power; And a wireless transmission function of receiving a wireless transmission request from the outside, and wirelessly transmitting information based on a detection signal output from the sensor when a wireless transmission request is received from the outside by the reception function. And a wireless transmission device having a transmission function.

According to the measuring device of the first aspect, a predetermined physical quantity is detected by the sensor and output as a detection signal. Here, the physical quantities include all physical quantities that can be detected by existing sensors, such as temperature, humidity, pressure, distortion amount, and light amount. Therefore, the above-mentioned sensors include all existing sensors such as a temperature sensor, a humidity sensor, a pressure sensor, a strain sensor, and a light amount sensor.

Further, in the measuring device according to the first aspect, when a wireless transmission request from the outside is received by a receiving function provided in a wireless transmission device driven by power output from a power supply, the output from the sensor is output. Information based on the detected signal is wirelessly transmitted by a transmission function provided in the wireless transmission device. Here, the power source includes all power sources that can supply power, such as solar cells and dry cells.

In general, the power consumed by a transmitting circuit is much larger than that of a receiving circuit. Therefore, claim 1
In the invention described in (1), the power consumption of the wireless transmission is reduced by wirelessly transmitting information based on the detection signal output from the sensor only when a wireless transmission request from the outside is received.

As described above, according to the measuring device of the first aspect, the information based on the detection signal output from the sensor is wirelessly transmitted only when a wireless transmission request is received from the outside. The required power consumption can be suppressed, and as a result, the power supply can be made small with a small capacity, and the device can be downsized.

[0013] According to a second aspect of the present invention, there is provided a measuring device which detects a predetermined physical quantity and outputs the detected physical quantity as a detection signal;
A power supply that generates and outputs power corresponding to the energy of radio waves of a predetermined frequency incident from the outside, and wirelessly transmits information based on a detection signal output from the sensor while being driven by the power output from the power supply. And a wireless transmission device.

According to the measuring device of the present invention, a predetermined physical quantity is detected by the sensor and output as a detection signal. Here, the physical quantities include all physical quantities that can be detected by an existing sensor, such as temperature, humidity, pressure, distortion, and light quantity, as in the first aspect of the present invention. Therefore, the sensors include a temperature sensor, a humidity sensor,
Includes all existing sensors such as pressure sensors, strain sensors, light sensors, etc.

Further, the measuring device according to the present invention is provided with a power supply for generating and outputting power corresponding to the energy of radio waves of a predetermined frequency incident from the outside, and the power output from the power supply is provided. Wirelessly transmits information based on the detection signal output from the sensor. Here, the power supply includes "'SP
Research on rectennas for S (solar power generation satellite) power receiving devices The power receiving elements described in “Technical Research Report of the Institute of Electronics and Communication Engineers, vol.

That is, the radio transmission apparatus according to the present invention
It is driven by power output from a power supply that generates and outputs power corresponding to the energy of radio waves of a predetermined frequency that is incident from the outside. Therefore, when the radio waves of the predetermined frequency do not enter from outside, wireless transmission is performed. Will not be performed. In the present invention, the power consumption for wireless transmission is reduced by such an operation.

Further, since the power supply according to the present invention is of a type that generates and outputs power corresponding to the energy of radio waves of a predetermined frequency incident from the outside, radio waves of energy corresponding to the power required for wireless transmission , From the outside, it is possible to generate relatively large power for wireless transmission. Therefore, the power supply according to the present invention can be small regardless of the amount of generated power.

As described above, according to the measuring apparatus of the second aspect, the power supply for generating and outputting the power corresponding to the energy of the radio wave of the predetermined frequency which is incident from the outside is provided, and the power output from the power supply is provided. Since information based on the detection signal output from the sensor is wirelessly transmitted by electric power, the device can be reduced in size and power consumption.

According to a third aspect of the present invention, as set forth in the first or second aspect, the apparatus further includes a processing device for performing a predetermined process on the detection signal output from the sensor. The wireless transmission device may adopt a mode of wirelessly transmitting information processed by the processing device.

According to the measuring device of the third aspect, in the invention of the first or second aspect, the processing device
A predetermined process is performed on the detection signal output from the sensor, and the information after processing by the processing device is wirelessly transmitted by the wireless transmission device. Here, the predetermined processing includes analog / digital conversion processing when the detection signal output from the sensor is an analog signal, processing according to the signal level of the detection signal, filtering processing for noise removal, and the like. Is included.

As described above, according to the measuring device of the third aspect, the same effect as that of the first or second aspect of the invention can be obtained, and a predetermined value is applied to the detection signal output from the sensor. Is provided, an appropriate detection signal can be obtained according to the measurement target, the measurement environment, and the like.

According to a fourth aspect of the present invention, in the measuring device according to any one of the first to third aspects, the sensor includes a shape memory alloy.
The amount of strain is detected as the physical quantity based on a change in electrical resistance of the shape memory alloy.

That is, there is a characteristic that the electric resistance of the shape memory alloy changes with high accuracy according to the amount of strain, and this characteristic does not depend on the size of the shape memory alloy. Therefore, in the invention according to claim 4, by utilizing the above characteristics, a small-sized shape memory alloy is applied as a sensor for detecting the amount of strain, whereby the size of the sensor can be reduced, and the size of the device can be reduced. Can be realized.

According to a fifth aspect of the present invention, in the measuring device according to any one of the first to fourth aspects, the wireless transmission device stores information based on a detection signal output from the sensor. Storage means for outputting the data to the storage device.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, information based on the detection signal output from the sensor is stored in the storage means. Output to the wireless transmission device.
That is, the information based on the detection signal once stored in the storage unit is wirelessly transmitted from the wireless transmission device of the measuring device according to the present invention.

As described above, according to the measuring device of the fifth aspect, the same effect as the invention of any one of the first to fourth aspects can be obtained, and the detection output from the sensor can be obtained. Since the storage means for storing the information based on the signal is provided, by sequentially storing the sensor outputs in the storage means, when the information based on the detection signal is wirelessly transmitted, the information is stored in the storage means by then. The information can be transmitted all at once.

On the other hand, a monitoring system according to a sixth aspect of the present invention includes a plurality of measuring devices according to the present invention, a receiving device for receiving information wirelessly transmitted from at least one of the plurality of measuring devices, and a receiving device. A monitoring device for monitoring the received information.

According to the monitoring system of the sixth aspect, the information wirelessly transmitted from at least one of the plurality of measuring devices according to the present invention is received by the receiving device, and the received information is monitored by the monitoring device. .
Here, a computer such as a personal computer or a PDA (Personal Data Assi
Communication devices such as stants (portable information communication device for individuals) can be applied.

According to the monitoring system of the sixth aspect, since the physical quantity is collected by applying the plurality of measuring devices according to the present invention capable of reducing the size and power consumption, the measuring device can be used. The labor at the time of installation can be saved, the number of replacements of the measuring device can be reduced, and the collection of physical quantities can be performed easily.

[0030] Further, like the invention according to the seventh aspect, the invention according to the sixth aspect may further include a relay device for relaying the information received by the receiving device to the monitor device. it can.

Thus, the physical quantity measured by the measuring device according to the present invention can be transmitted to a remote place, and the centralized management of the physical quantity can be realized.

[0032]

Embodiments of the present invention will be described below in detail with reference to the drawings. In this embodiment, a case will be described in which the measuring device according to the present invention is applied as a device for measuring the amount of distortion of a beam, a column, or the like of a building.

[First Embodiment] FIG. 1 shows the configuration of a measuring apparatus 10 according to the first embodiment. As shown in FIG. 1, a measuring device 10 according to the first embodiment includes a sensor 14 configured to include a shape memory alloy for detecting a strain amount, and a sensor 14 configured to detect a strain amount detected by the sensor 14. A data processing circuit 16 for performing various operations; a wireless transmitter 18 for wirelessly transmitting data after the arithmetic processing by the data processing circuit 16 to the outside; and a driving device for the sensor 14, the data processing circuit 16, and the wireless transmitter 18. And a power supply 20 for supplying electric power, and the measuring device 10 has a predetermined dimension (in the present embodiment, a width of 60 mm and a height of 20 m).
m, a thickness of 150 μm), a sensor 14, a data processing circuit 16, and a wireless transmitter 18 on a rectangular thin plate-shaped substrate 12.
And a power supply 20 are integrally formed. The substrate 12 according to the present embodiment is mainly made of plastic, but is not limited to this, and may be made of rubber or metal.

The sensor 14 is configured to include a shape memory alloy as described above. In other words, the electrical resistance of the shape memory alloy changes with high precision according to the amount of strain, and the electrical resistance shows a good correlation with the strain up to a large strain range. Does not depend on Therefore, the sensor 14 according to the present embodiment detects the amount of distortion at the installation position of the sensor 14 using such characteristics of the shape memory alloy, and generates an electric signal indicating the detection result (the detection signal of the present invention). ) Is output. In the present embodiment, as shown in FIG. 1, a shape memory alloy is printed at a predetermined position on the substrate 12 by an ion plating method, or an alloy thin film is formed by an alloy thin film manufacturing apparatus or the like, and a predetermined shape is formed. The sensor 14 is formed by, for example, bonding to a substrate after processing.

The data processing circuit 16 includes a memory 17 for performing arithmetic processing on the electric signal input from the sensor 14 as data by a built-in arithmetic process, and sequentially storing the data after the arithmetic processing. 1
7 and outputting the data after the arithmetic processing stored in the memory 17 to the wireless transmitter 18 as an electric signal as main functions.

The arithmetic processing performed by the data processing circuit 16 includes, as shown in FIG. 2A, the maximum amount of the distortion amount for each predetermined measurement time with respect to the electric signal indicating the distortion amount input from the sensor 14. 2B, a process in which only data is selected and processed as data, or as shown in FIG. 2B, an electric signal that exceeds a predetermined threshold level with respect to an electric signal indicating the amount of distortion input from the sensor 14, A mode in which only the number of times exceeding the threshold value is selected and processed as data is exemplified.

The electric signal output from the sensor 14 is directly transmitted to the wireless transmitter 18 without any processing.
In the case of a configuration in which the data processing circuit 1
6 is not particularly required.

Further, the radio transmitter 18 incorporates a transmission circuit and a reception circuit for transmitting and receiving radio signals, an amplifier circuit for supplementing a transmission output, a control circuit for performing data transmission control, and the like. Configured as a module. In the wireless transmitter 18 according to the present embodiment, the data processing circuit 1 is activated only when a wireless signal indicating a wireless transmission request is received from a data collection computer 50 described later.
6 is configured to wirelessly transmit data indicated by the electric signal input from outside to the outside. The wireless transmitter 18
An antenna 19 is provided in a transmission circuit incorporated in the communication device, and the transmission circuit transmits a radio signal via the antenna 19.

Here, the specifications of the wireless transmitter 18 (for example, the intensity of the output radio wave, the frequency band, the data transmission method, etc.) depend on the data transmission distance, the electromagnetic environment of the space in which the measuring device 10 is used, and the like. Determined optimally. Therefore, as the wireless transmitter 18, the wireless LA, which is rapidly spreading in recent years,
A transmission / reception module used in N (local area network), a transmission / reception module used in short-range wireless data communication technology currently being developed by manufacturers, so-called Bluetooth, and the like can be applied.

In the present embodiment, since a plurality of measuring devices 10 are used simultaneously as described later, each measuring device 10 is used for the radio signal transmitted by the wireless transmitter 18 of each measuring device 10. By adding a signal indicating different identification information every time, it is possible to identify which measuring device 10 is the wireless signal transmitted. If the wireless signal transmitted and received by the wireless transmitter 18 is expected to affect other information devices, measures such as making the frequency band of the wireless signal different from that of other information devices should be taken in advance. Implement it.

On the other hand, the power supply 20 has a role of supplying power to the sensor 14, the data processing circuit 16, and the wireless transmitter 18. The power supply 2 according to the present embodiment
Reference numeral 0 indicates that the predetermined power is always supplied to the sensor 14, the data processing circuit 16, and the receiving circuit (not shown) of the wireless transmitter 18, and the transmitting circuit and the amplifier circuit (not shown) of the wireless transmitter 18 are supplied. On the other hand, power is supplied only when a radio signal indicating a radio transmission request described later is received by the receiving circuit. Therefore, data obtained by subjecting the data indicating the amount of distortion measured by the sensor 14 to predetermined arithmetic processing is sequentially stored in the memory 17 of the data processing circuit 16. Further, the power supply 20 according to the present embodiment is configured by a dry battery.

Next, the configuration of the monitoring system 30 according to the present embodiment will be described with reference to FIG. In addition,
In the present embodiment, the measuring device 10 according to the present embodiment
Is applied to a monitoring system for monitoring the amount of distortion of beams 42 and columns 44 in a building 40 having four floors above ground and one floor below ground.

As shown in the figure, in the monitoring system 30 according to the present embodiment, a measuring device 1 is used for a plurality of positions of beams 42 and columns 44 on each floor of a building 40.
0 is set.

The data collecting computer 50 shown in FIG. 1 has a built-in receiving module for receiving a radio signal transmitted from each measuring device 10. The receiving module receives the radio signal and receives the radio signal.
It has a role of separating the distortion amount indicated by the received wireless signal for each measurement position based on the signal indicating the above-mentioned identification information added to the wireless signal, and monitoring by a built-in liquid crystal display.

The data collection computer 50 has a built-in transmission module for transmitting a radio signal indicating the above-mentioned radio transmission request and other various radio waves, and monitors the distortion amount at each measurement position. At this time, a wireless signal indicating the wireless transmission request is transmitted.

The receiving module built in the data collection computer 50 of the present embodiment has a capability of receiving a radio signal transmitted from the measuring device 10 on three floors of the building 40. Therefore, in the present embodiment, two data collection computers 50 are prepared, one of which is provided on the first floor, and the radio signals from the measuring device 10 for three floors, one underground, one above ground, and two above ground, are transmitted. Allocated to receive, the other on the third floor above the ground
It is assigned to receive radio signals from the measuring device 10 for two floors, four floors and four floors above ground.

The measuring device 10 is the measuring device of the present invention, the sensor 14 is the sensor of the present invention, the data processing circuit 16 is the processing device of the present invention, the memory 17 is the storage means of the present invention, and the wireless transmitter 18 is the The wireless transmission device of the present invention has a power supply 2
0 is the power supply of the present invention, the monitoring system 30 is the monitoring system of the present invention, the receiving module built in the data collecting computer 50 is the receiving device of the present invention, and the data collecting computer 50 is the monitoring device of the present invention. , Respectively.

Next, the operation of the first embodiment will be described.
Here, an overall operation when the monitoring system 30 monitors the distortion amount at each measurement position of the building 40 will be described.

The data collection computer 50 first
A built-in transmission module (not shown) transmits a wireless signal indicating a wireless transmission request to each assigned measuring device 10.

On the other hand, when the wireless transmitter 18 in each measuring device 10 receives a wireless signal indicating a wireless transmission request from the data collection computer 50, the wireless transmitter 18 sends a data to a transmission circuit (not shown) of the wireless transmitter 18. The power supply 20 is controlled to supply power for enabling transmission of data indicating the amount of distortion stored in the memory 17 of the processing circuit 16 as a wireless signal.

As a result, a wireless signal indicating the amount of distortion stored in the memory 17 is transmitted from the wireless transmitter 18 of each measuring device 10 to the corresponding data collection computer 50.

When receiving the wireless signal transmitted from each measuring device 10, the data collection computer 50 separates the wireless signal for each measurement position based on the signal indicating the identification information added to the received wireless signal. Separately, the amount of distortion at each measurement position is displayed on a liquid crystal display and stored in a built-in storage device.

When the measuring device 10 breaks down,
Since the wireless signal from the measuring device is not transmitted wirelessly, the data collection computer 50 can immediately determine whether or not the measuring device 10 has failed. In addition, even when the sensor portion is damaged by an excessive load, it is possible to determine the damage state by analyzing the presence or absence of data transmission or the abnormality of the data. Therefore, maintenance of the measuring device 10 is easy. is there.

As described above in detail, in the measuring device according to the first embodiment, information based on the detection signal output from the sensor is wirelessly transmitted only when a wireless transmission request is received from the outside. In addition, power consumption required for wireless transmission can be suppressed, and as a result, the power supply can be reduced in capacity and size, and the device can be reduced in size.

The measuring apparatus according to the first embodiment includes a data processing circuit for performing a predetermined process on the detection signal output from the sensor.
An appropriate detection signal according to the measurement environment or the like can be obtained.

Further, in the measuring device according to the first embodiment, since the small-sized shape memory alloy is applied as a sensor for detecting the amount of strain, the sensor can be downsized, and the measuring device can be downsized. Can be

The measuring device according to the first embodiment has a memory for storing information based on the detection signal output from the sensor, and the sensor output is sequentially stored in the memory. When wirelessly transmitting information based on the information, information stored in the memory up to that time can be transmitted at a time.

Further, in the monitoring system according to the first embodiment, since the physical quantity (distortion amount) is collected by applying a plurality of measuring apparatuses according to the present invention which can be reduced in size and power consumption, the measurement is performed. The labor at the time of installation of the device can be saved, the number of times of replacement of the measuring device can be reduced, and the physical quantity can be easily collected.

In the first embodiment, the measuring device 10
Has described the case where the information indicating the amount of distortion is wirelessly transmitted when a wireless signal indicating a wireless transmission request is received, but the present invention is not limited to this. For example, the data collection computer 50 or another The apparatus is provided with a function of transmitting a radio signal indicating earthquake occurrence information when an earthquake of a predetermined seismic intensity or higher occurs, and the wireless transmitter 1 is only provided when the measuring apparatus 10 receives the radio signal indicating the earthquake occurrence information.
By supplying power to the transmission circuit and the amplifier circuit (not shown) of No. 8, information indicating the amount of distortion can be wirelessly transmitted only when an earthquake of the predetermined seismic intensity or higher occurs. In this case, when an earthquake of a predetermined seismic intensity or higher occurs, the distortion status of each part of the building 40 can be monitored immediately, so that the damage status of the building 40 due to the earthquake can be grasped in a short time.

In the first embodiment, taking into consideration the receiving capability of the data collection computer 50, each measurement device 1 is shared by two data collection computers 50.
Although the case of receiving a radio signal from 0 has been described,
The present invention is not limited to this, and it is also possible to adopt a form in which a relay antenna is provided for every several floors and only one data collection computer 50 receives the data. In this case, although the cost for installing the relay antenna is generated, the number of the data collection computers 50 can be reduced, so that the cost as a whole can be reduced.

[Second Embodiment] First, referring to FIG.
The configuration of the measuring device 10 'according to the second embodiment will be described. The same reference numerals as in FIG. 1 denote the same parts in FIG. 3, and a description thereof will be omitted.

The measuring device 10 ′ according to the second embodiment comprises:
Instead of the wireless transmitter 18 in the first embodiment, a receiving circuit is not incorporated, but a transmitting circuit, an amplifier circuit for supplementing a transmission output, a control circuit for performing data transmission control, and the like are incorporated. Using a wireless transmitter 18 ′ configured as a module and replacing the power supply 20 with a rechargeable secondary battery 20 </ b> A as shown in FIG. 5 and power for supplementary charging of the secondary battery 20 </ b> A, and Power receiving element 20B for supplying power to each part of wireless transmitter 18 '
Only the point that a power supply 20 ′ provided with

Here, the power receiving element 20B has a function of generating and outputting power in accordance with the energy of radio waves of a predetermined frequency input from the outside. As the power receiving element 20B, "'SPS ( Research on rectennas for solar power generation satellites) 'Technical Research Report of the Institute of Electrical Communication, vol.
83, No. 70, p1-5 1983 "and the like.

The secondary battery 20A has a role of supplying power to the sensor 14 and the data processing circuit 16. The power receiving element 20B performs supplementary charging of the secondary battery 20A with power corresponding to the energy of the radio wave when the radio wave of the predetermined frequency is input from the data collection computer 50, and also transmits the radio wave to the wireless transmitter 18 '. It supplies power capable of performing wireless transmission to a built-in transmission circuit (not shown).

Since the configuration other than the measuring device is the same as that of the first embodiment, the description is omitted here.

The measuring device 10 ′ corresponds to the measuring device of the present invention, the wireless transmitter 18 ′ corresponds to the wireless transmitting device of the present invention, and the power supply 20 ′.
Correspond to the power supply of the present invention.

Next, the operation of the second embodiment will be described.
Here, an overall operation when the monitoring system 30 monitors the distortion amount at each measurement position of the building 40 will be described.

The data collection computer 50 firstly
For each assigned measuring device 10 ′, the power receiving element 20 </ b> B of the measuring device 10 ′ has an energy that can supply enough power to perform wireless transmission to a transmission circuit built in the wireless transmitter 18 ′. Transmit radio waves.

As a result, the power receiving element 20 B in each measuring device 10 ′ transmits the power corresponding to the energy of the radio wave from the data collection computer 50 to the radio transmitter 18 ′.
Supply to the transmission circuit is started.

Therefore, the wireless transmitter 1 of each measuring device 10 ′
From 8 ′, a wireless signal indicating the amount of distortion stored in the memory 17 is transmitted to the corresponding data collection computer 50.

When the data collection computer 50 receives the radio signal transmitted from each measuring device 10 ′, the data collection computer 50 transmits the radio signal for each measurement position based on the signal indicating the identification information added to the received radio signal. After sorting, the amount of distortion at each measurement position is displayed on a liquid crystal display and stored in a built-in storage device.

As described in detail above, the measuring apparatus according to the second embodiment includes a power supply for generating and outputting power in accordance with the energy of radio waves of a predetermined frequency incident from the outside. Since the information based on the detection signal output from the sensor is wirelessly transmitted by the power output from the sensor, the power source can be downsized, and as a result, the device can be downsized.

The measuring device according to the second embodiment includes a data processing circuit for performing a predetermined process on the detection signal output from the sensor.
An appropriate detection signal according to the measurement environment or the like can be obtained.

In the measuring device according to the second embodiment, since the small-sized shape memory alloy is used as a sensor for detecting the amount of strain, the sensor can be downsized, and the measuring device can be downsized. Can be

Further, the measuring device according to the second embodiment includes a memory for storing information based on the detection signal output from the sensor, and the sensor output is sequentially stored in the memory. When wirelessly transmitting information based on the information, information stored in the memory up to that time can be transmitted at a time.

In the measuring device according to the second embodiment, a device that generates and outputs power corresponding to the energy of radio waves of a predetermined frequency incident from the outside is applied as a power source. It can be driven continuously for a long time without replacing the battery, and the reliability of measurement can be improved.

Further, in the monitoring system according to the second embodiment, since a plurality of measuring devices according to the present invention capable of miniaturization and power saving are applied to collect a physical quantity (distortion quantity), The labor at the time of installation of the device can be saved, the number of times of replacement of the measuring device can be reduced, and the physical quantity can be easily collected.

In the second embodiment, the measuring device 1
The case where the distortion amount is constantly measured and stored by 0 ′ and the measurement information is wirelessly transmitted when the measuring device 10 ′ receives a radio wave of a predetermined frequency has been described. The present invention is not limited to this, and includes, for example, a function for detecting seismic motion in the data collection computer 50 or another device, and a function of emitting power of a predetermined frequency when the seismic motion is detected by the function. In general, the measuring device does not measure the amount of distortion, but only measures the amount of distortion and wirelessly transmits information indicating the measured amount of distortion only when the radio wave of the predetermined frequency is incident. You can also. In this case, the power source 20 'of the measuring device 10' does not need to supply power in a state where no earthquake has occurred, and in this embodiment, the number of secondary batteries in FIG. 5 can be reduced.

In each of the above embodiments, as shown in FIG. 6A, the case where the amount of distortion is directly monitored by the data collection computer 50 which receives the radio signal from each measuring device 10 (10 '). Although described, the present invention is not limited to this. For example, FIG.
As shown in (B), a function of receiving a wireless signal from each measuring device 10 (10 ') and an instruction signal for instructing each measuring device 10 (10') to perform wireless transmission (first embodiment) A data recording relay device i having a function equivalent to that of the data collection computer 50, such as a function of transmitting a "wireless signal indicating a wireless transmission request", and a function of transmitting a "radio wave of a predetermined frequency" in the second embodiment. A plurality of data recording relay devices i + 1, i + 2,... For relaying information indicated by the radio signal received by the relay device i are provided, and the information is transmitted to the data collection computer 50 via each data recording relay device. May be transmitted. In this case, as shown in the figure, transmission between each data recording relay device or between the last data recording relay device and the data collection computer 50 is performed by either wireless data transmission or wired data transmission. Data transmission is also applicable.

As a development of this form, as shown in FIG. 7, data showing the amount of distortion in a plurality of structures can be centrally managed. That is, as shown in the figure, the measuring device 10 (10 ′) is installed on a target member in a structure such as a building, and each measuring device 1
0 is wirelessly transmitted to the data recording repeater, and the data recording repeater uses the existing optical fiber communication network or the like laid in the area where the structure is located. By transmitting the received data to the (remote base), the state of the structure can be centrally monitored at the data management center. In addition, by applying such a measurement form to a plurality of structures, it becomes possible to centrally monitor structures in the entire area. Furthermore, by integrating data management centers for each region, it is possible to monitor a group of structures on a prefecture-by-prefecture basis.
It is also possible to build a monitoring system for centralized management at several locations.

In each of the above embodiments, the case where the measuring device according to the present invention is applied to a measuring device for measuring a distortion amount has been described. However, the present invention is not limited to this. The present invention can be applied to a measuring device for measuring temperature, humidity, pressure, light amount, and the like. In this case, the sensor 14 in each of the above embodiments is used.
May be replaced with a sensor for measuring the corresponding physical quantity. In this case, substantially the same effects as in the above embodiments can be obtained.

[0082]

As described above, according to the measuring device of the first aspect, the information based on the detection signal output from the sensor is wirelessly transmitted only when a wireless transmission request is received from the outside. In addition, the power consumption required for wireless transmission can be suppressed, and as a result, the power supply can be reduced in capacity and size, and the size of the device can be reduced.

According to the measuring device of the second aspect,
A power source is provided for generating and outputting power corresponding to the energy of radio waves of a predetermined frequency incident from the outside, and wirelessly transmits information based on a detection signal output from a sensor by the power output from the power source. Therefore, the effect that the device can be reduced in size and power consumption can be obtained.

Further, according to the monitoring system according to the present invention, since a plurality of measuring devices according to the present invention capable of miniaturization and power saving are applied to collect physical quantities, the monitoring system at the time of installation of the measuring devices is used. In addition to the labor saving, the number of replacement of the measuring device can be reduced, and the physical quantity can be easily collected.

[Brief description of the drawings]

FIG. 1 is a plan view showing the appearance of a measuring device according to a first embodiment.

FIG. 2 is a graph used for describing arithmetic processing of the data processing circuit according to the embodiment;

FIG. 3 is a schematic side view illustrating a configuration of a monitoring system according to the embodiment.

FIG. 4 is a plan view illustrating an appearance of a measurement device according to a second embodiment.

FIG. 5 is a block diagram illustrating a configuration of a power supply according to a second embodiment.

FIG. 6A is a block diagram illustrating a schematic configuration of a monitoring system according to each embodiment, and FIG. 6B is another example of a data having a function of receiving a wireless signal from each measurement device. FIG. 2 is a block diagram illustrating a configuration example in a case where a recording relay device and a plurality of data recording relay devices that relay information indicated by a wireless signal received by the data recording relay device are provided.

FIG. 7 is a schematic diagram showing a configuration example of a form in which data indicating the amount of distortion in a plurality of structures is centrally managed as a development of the form in FIG. 6B.

[Explanation of symbols]

 10, 10 'measuring device 12 substrate 14 sensor 16 data processing circuit (processing device) 17 memory (storage means) 18, 18' radio transmitter (radio transmission device) 19 antenna 20, 20 'power supply 30 monitoring system 50 for data collection Computer (monitor device)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takahisa Ogawa 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside the Technical Research Institute, Takenaka Corporation (72) Inventor Kenichi Haragawa 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside Takenaka Corporation Technical Research Institute (72) Inventor Satoru Aizawa 1-5-1, Otsuka, Inzai City, Chiba Prefecture F-Term Inside Takenaka Corporation Technical Research Center CC12 CD00 DD06 DD07 DE02 DE13 EE11 EE12 EF09 FF01 FG01 FG02 GG01 GG09

Claims (7)

[Claims] A sensor that detects a predetermined physical quantity and outputs the detected signal as a detection signal; a power supply that outputs power; and a power supply that is driven by the power output from the power supply.
A wireless transmission device having a reception function of receiving a wireless transmission request from the outside and a transmission function of wirelessly transmitting information based on a detection signal output from the sensor when a wireless transmission request is received from the outside by the reception function; A measuring device comprising: 2. A sensor that detects a predetermined physical quantity and outputs the detection signal as a detection signal; a power supply that generates and outputs power corresponding to the energy of radio waves of a predetermined frequency incident from the outside; and a power supply that is output from the power supply. Driven by electric power,
A wireless transmission device for wirelessly transmitting information based on the detection signal output from the sensor. 3. A processing device for performing a predetermined process on a detection signal output from the sensor, wherein the wireless transmission device wirelessly transmits information processed by the processing device. Claim 1 or Claim 2
The measuring device as described. 4. The sensor according to claim 1, wherein the sensor includes a shape memory alloy, and detects a strain amount as the physical quantity based on a change in electric resistance of the shape memory alloy. Item 4. The measuring device according to any one of Items 3. 5. The wireless communication apparatus according to claim 1, further comprising a storage unit configured to store information based on a detection signal output from the sensor and output the information to the wireless transmission device. The measuring device as described. 6. A plurality of measuring devices according to claim 1, a receiving device for receiving information wirelessly transmitted from at least one of the plurality of measuring devices, and a receiving device A monitoring device for monitoring the information received by the monitoring system. 7. The monitoring system according to claim 6, further comprising a relay device for relaying information received by the receiving device to the monitor device.