JP2001201373A - Embedded type versatile sensor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure an internal condition for a building or the like which is difficult to be nondestructively measured. SOLUTION: This device is composed of an embedded sensor A and an external reader B. The sensor A is composed of a computing part, a memory part, a sensor controlling part, a built-in sensor, an external sensor connecting connector, a modulating and demodulating part, a control part, an antenna part, and a battery charger. The embedded sensor of no battery charger type is also acceptable. The reader B is composed of a modulating and demodulating part, a computing part, a memory part and an external inputting and outputting part.

Description

DETAILED DESCRIPTION OF THE INVENTION

 [Industrial applications]

This apparatus is used by being mixed in or installed outside building materials such as buildings, industrial waste storage facilities, tunnel structures and nuclear reactor facilities.

[0002] This device measures the internal state of a building or the like that has been considered to be difficult to measure up to now because of non-destruction. [Conventional technology]

Conventionally, such a device does not exist. However, non-destructive measurement of the internal state of a building or the like has conventionally been performed by a method such as an X-ray inspection or an ultrasonic search. In some cases, it is not possible to inspect the area, and it is difficult to obtain accurate internal information. [Problems to be solved by the invention]

[0004] In the conventional method, large-scale equipment is required, and since the measurement is local, a wide range of measurement cannot be performed in a short time.

Further, in the conventional method, detailed internal information cannot be directly taken in, and the internal state is estimated from the obtained information, which causes a problem in information reliability.

Furthermore, it is impossible to obtain detailed information on the inside of a structure or underground by the conventional method. [Means for solving the problem]

In order to obtain information on the inside of a structure or underground in detail and in a wide range, an embedded sensor is embedded in advance in a place such as a building where measurement is desired.
There is a method of directly measuring internal information using the sensor.

However, when the sensor is embedded in a structure or in the ground, means for supplying power to the sensor and outputting information from the sensor to the outside must be secured.

The present apparatus can incorporate and externally attach various sensors, and has a power supply unit for the sensors and an external input / output device for wireless sensor information. Detailed information can be collected. In addition, when a sensor is externally attached, the cable and the sensor unit can be separated to a certain extent by a cable, so that it is possible to respond to a certain depth even when it is difficult to externally input and output sensor information by wireless. . [Example]

[0010] For example, this device is used mixed with concrete, like the gravel used when making concrete. Or mixed into industrial waste, or
It is located directly below the water leakage prevention sheet of the accommodation facility.
Fig. 1 embedded in concrete for building tunnels. FIG. 2 shows a block diagram of the apparatus of the invention described above. [The invention's effect]

According to the present invention, it is possible to measure the internal state of a structure or the like which has conventionally been difficult to measure due to non-destruction. Further, by extending the sensor mounted on the device with a cable or the like, the sensor can be attached to a position where wireless communication cannot be performed.

[Brief description of the drawings]

Fig. 1 Example of embedded sensor in tunnel construction

FIG. 2 Embedded sensor device

Claims (2)

[Claims] The present invention relates to an embedded sensor for performing measurement by using a sensor embedded and provided externally in a structure or underground, and an external device for controlling the embedded sensor by using wireless communication and acquiring measurement data. It consists of a reading device, wireless communication between the embedded sensor and the external reading device is two-way communication, all controls of this device including measurement are executed by commands from the outside, and measurement data is not only transmitted to the outside but also The history of the measurement data can be managed by storing it in the internal memory of the embedded sensor, and the power supply of the embedded sensor is performed by charging the built-in rechargeable battery using electromagnetic induction generated by radio waves used for wireless communication. 2. This device does not incorporate a rechargeable battery in the embedded sensor due to environmental considerations, and drives the embedded sensor by electromagnetic induction by the radio wave only when radio wave access is received from an external device, and identifies the sensor. And sensor information can be communicated to an external device.In this case, measurement data is stored in the internal memory of the external device to perform processing such as history management, and the location of the embedded sensor is identified by the radio wave returned from the sensor device. And the direction of radio waves measured from several external locations.