JPH10253754A - Radio data collection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for the power supply wiring construction of a sensor circuit by providing a power supply means to a response equipment and supplying a power from a response equipment side to the sensor circuit. SOLUTION: An interrogator 50a modulates a command and the like by a modulation circuit 12 with a transmitter 10 as a carrier and transmits it to a responder 51a via an antenna 3a. The responder 51a demodulates a modulation signal that is received by the antenna 4 by a detector 5 and outputs it to a control circuit 6. The control circuit 6 extracts a command from a signal that is inputted from the detector 5 and interprets data. For example, a command for enabling data to be read from a sensor circuit 16 is issued, the control circuit 6 turns on a switch circuit 15 according to a control signal and supplies a power from a power supply circuit 14 to the sensor circuit 16. When the control circuit 6 reads output data from the sensor circuit 16, it breaks a power supply to the sensor circuit 16 by a control signal, outputs the output data of the sensor circuit 16 to a modulation circuit 8, modulates a non-modulation interrogation signal from an interrogator 50a and reflects it to the interrogator 50a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless data collecting apparatus for collecting data of a device using wireless, and more particularly to a wireless data collecting apparatus capable of supplying power to a sensor circuit.

[0002]

2. Description of the Related Art A conventional wireless data collection device collects an output signal of a sensor circuit attached to a device or the like by an interrogator via a transponder, and uploads measurement data collected by the interrogator to a host computer or the like. And required processing.

[0003] Examples of such prior art are Japanese Patent Application Nos. 7-112216 and 7-185 filed by the present applicant.
No. 629 or Japanese Patent Application No. 8-013993.

FIG. 2 is a block diagram showing an example of a conventional wireless data collecting apparatus disclosed in Japanese Patent Application No. 7-185629.

In FIG. 2, 1 is a signal processing circuit, 2 is a display, 3 and 4 are antennas, 5 is a detector, 6 is a control circuit,
7 is an arithmetic circuit, 8 is a modulation circuit, and 9a and 9b are sensor circuits.

Here, 1 to 3 indicate the interrogator 50 and 4
8 constitute the transponder 51, respectively.

In the interrogator 50, the display 2 is provided in the signal processing circuit 1, and the input and output of the signal processing circuit 1 are connected to the antenna 3.

On the other hand, in the transponder 51, the input / output of the antenna 4 is connected to the input terminal of the detector 5 and the output terminal of the modulation circuit 8, and the output of the detector 5 is connected to the control circuit 6.

The output of the control circuit 6 is output from the sensor circuits 9a and 9
b, the outputs of the sensor circuits 9a and 9b are connected to the arithmetic circuit 7, and the output of the arithmetic circuit 7 is connected to the modulation circuit 8.

Now, the operation of the conventional example shown in FIG. 2 will be described. First, the interrogator 50 transmits a command or the like to the transponder 51 after modulating it with ASK (Amplitude shift keying) modulation or the like.

The transponder 51 receives the modulated signal by the antenna 4, demodulates the signal by the detector 5, and outputs the demodulated signal to the control circuit 6. The control circuit 6 extracts a command from the signal input from the detector 5, interprets the content of the command, and performs necessary processing.

For example, consider a case where the sensor circuit 9a is a pressure sensor and the sensor circuit 9b is a temperature sensor, and temperature compensation is required for output data of the sensor circuit 9a.

If the command from the interrogator 50 is a request to read out temperature-compensated pressure data, the control circuit 6 sends a control signal to the control terminals of the sensor circuits 9a and 9b to send the control signals to the sensor circuits 9a and 9b. To the operating state.

The output data of the sensor circuits 9a and 9b are input to an arithmetic circuit 7, and the arithmetic circuit 7 compensates the output data of the sensor circuit 9a with the output data of the sensor circuit 9b and outputs the output data to the modulation circuit 8.

The modulation circuit 8 converts the unmodulated interrogation wave from the interrogator 50 based on the output of the arithmetic circuit 7 into a BPSK (Binary phas
e shift keying) modulation and the like and reflect it to the interrogator 50.

As a result, the transponder 51 can transmit the operation result to the interrogator 50 after performing necessary arithmetic processing on the output data of the plurality of sensor circuits based on the command transmitted from the interrogator 50. Become.

[0017]

However, in the conventional wireless data collection apparatus, when the sensor circuits 9a and 9b shown in FIG. 2 are thermocouples, piezoelectric elements, or the like, the output signals thereof are measured directly by the transponder 51. However, when the output signal is weak, when a bias is required, or when nonlinear characteristics are compensated, an amplifier or the like is required on the sensor circuit side.

In this case, it is necessary to supply electric power to the sensor circuit from an external power supply, and the installation of the sensor circuit may be restricted depending on the installation site, for example, because it is difficult to install the external power supply.

In addition, there is a problem that power supply wiring work is required at the installation site, which increases installation cost. Therefore, an object of the present invention is to realize a wireless data collection device that does not require power supply wiring work for a sensor circuit.

[0020]

In order to achieve the above object, according to a first aspect of the present invention, an interrogator and a response which modulates an interrogation wave from the interrogator based on data and reflects it as a response wave. In the wireless data collection device composed of a device, an antenna that receives the interrogation wave and reflects the response wave, a detector that detects the interrogation wave, and a modulation circuit that modulates the interrogation wave, are connected. A power supply means for supplying power to the sensor circuit; and a transponder connected to the output of the detector and the sensor circuit and comprising a control circuit for controlling the modulation circuit and the power supply means. It is characterized by the following.

According to a second aspect of the present invention, in order to achieve the above object, in the first aspect of the present invention, the power supply means is shared with the transponder.

In order to achieve the above object, a third aspect of the present invention is characterized in that in the first aspect of the present invention, the power supply means is dedicated to the sensor circuit.

In order to achieve the above object, a fourth aspect of the present invention is characterized in that in the first aspect of the present invention, the power supply means has a power generation function.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the sensor circuit includes a thermometer, a rain / snow gauge, an anemometer, an anemometer, a snow depth gauge, or a solar radiation meter. It is characterized by being a total.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration block diagram showing one embodiment of a wireless data collection device according to the present invention.

In FIG. 1, 2, 4, 5, 6 and 8 correspond to FIG.
And 3a and 3b are antennas, 1
0 is an oscillator for generating carriers, 11 is a distributor, 12
Is a modulation circuit, 13 is a demodulation circuit, 14 is a power supply circuit such as a battery, 15 is a switch circuit, and 16 is a sensor circuit.

Reference numerals 2, 3a, 3b, and 10 to 13 denote an interrogator 50a; 4, 5, 6, 8, 14, and 15 a transponder 51a; 10 to 13, a signal processing circuit 52; Constitute power supply means 53, respectively.

In the interrogator 50a, the output of the oscillator 10 is connected to the distributor 11, and the two outputs of the distributor 11 are connected to the modulation circuit 12 and the demodulation circuit 13, respectively. The output of the modulator 12 is connected to an antenna 3a.
The output of b is connected to the demodulation circuit 13. The output of the demodulation circuit 13 is connected to the display 2.

On the other hand, in the transponder 51a, the input / output of the antenna 4 is connected to the input terminal of the detector 5 and the output terminal of the modulation circuit 8, and the output of the detector 5 is connected to the control circuit 6.

The output of the control circuit 6 is connected to the modulation circuit 8, and the control signal from the control circuit 6 is connected to the control terminal of the switch circuit 15.

The output of the power supply circuit 14 is connected to the power supply terminal of the sensor circuit 16 via the switch circuit 15, and the output from the sensor circuit 16 is connected to the control circuit 6.

Here, the operation of the embodiment shown in FIG. 1 will be described. First, the interrogator 50a modulates a command or the like by ASK modulation or the like in the modulation circuit 12 using the oscillator 10 as a carrier, and transmits it to the responder 51a via the antenna 3a.

The transponder 51a transmits the modulated signal to the antenna 4
And demodulated by the detector 5 and output to the control circuit 6.
The control circuit 6 extracts a command from the signal input from the detector 5, interprets the content of the command, and performs necessary processing.

For example, consider the case where the command is to read data from the sensor circuit 16.

The control circuit 6 turns on the switch circuit 15 according to a control signal and supplies the power from the power supply circuit 14 to the power supply terminal of the sensor circuit 16.

The sensor circuit 16 operates an internal amplifier or the like with the supplied power to amplify an output signal or compensate for non-linear characteristics, and then outputs the output to the control circuit 6 of the transponder 51a.
Output to

When the control circuit 6 reads the data from the sensor circuit 16, it switches the switch circuit 15 to "of" by the control signal.
Then, the power supply from the power supply circuit 14 to the sensor circuit 16 is cut off.

The control circuit 6 outputs the output data of the sensor circuit 16 to the modulation circuit 8, and the modulation circuit 8 converts the unmodulated interrogation wave from the interrogator 50a into BPSK based on the output of the control circuit 6.
The light is modulated by modulation or the like and reflected by the interrogator 50a.

That is, by supplying the necessary power to the sensor circuit 16 from the transponder 51a side, power supply wiring work is not required, and the sensor circuit can be attached regardless of the situation at the installation site.

Further, since there is no need for power wiring work, the installation cost is reduced. Further, since power is supplied to the sensor circuit 16 only when data is read from the sensor circuit 16, the life of the battery or the like serving as the power supply circuit 14 is extended.

As a result, the power supply means 5 is connected to the transponder 51a.
By providing 3, power is supplied to the sensor circuit 16 from the transponder 51a side, so that power supply wiring work for the sensor circuit 16 becomes unnecessary.

In the description of the embodiment shown in FIG. 1, a battery is illustrated as an example of the power supply circuit. However, a power generation means having a power generation capacity such as a solar cell may be used.

When a solar cell is used as the power supply circuit, light may be emitted from the interrogator 50a and supplied as energy.

In the embodiment shown in FIG.
Is illustrated as a dedicated power supply circuit of the sensor circuit 16 independently of the power supply circuit (not shown) of the transponder 51a, but may be shared with the power supply circuit (not shown) of the transponder 51a.

Further, by using a sensor circuit 16 for measuring environmental information such as a thermometer, a rain / snow gauge, an anemometer, an anemometer, a snow depth gauge, a pyranometer, etc., It is also possible to easily observe environmental data at remote locations.

Further, in the interrogator 50a of FIG. 1, two antennas 3a and 3b are used for transmission and reception, respectively, but they may be shared as transmission and reception antennas.

[0047]

As is apparent from the above description,
According to the present invention, the following effects can be obtained. By providing power supply means in the transponder, power is supplied from the transponder side to the sensor circuit, so that it is possible to realize a wireless data collection device that does not require power wiring work for the sensor circuit.

Further, by using a sensor circuit for measuring environmental information such as a thermometer, a rain / snow gauge, an anemometer, an anemometer, a snow depth gauge, a pyranometer, etc. It is also possible to easily observe the environmental data of the place.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram illustrating an embodiment of a wireless data collection device according to the present invention.

FIG. 2 is a configuration block diagram illustrating an example of a conventional wireless data collection device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Signal processing circuit 2 Display 3, 3a, 3b, 4 Antenna 5 Detector 6 Control circuit 7 Arithmetic circuit 8, 12 Modulation circuit 9a, 9b, 16 Sensor circuit 10 Oscillator 11 Distributor 13 Demodulation circuit 14 Power supply circuit 15 Switch circuit 50, 50a Interrogator 51, 51a Transponder 52 Signal processing circuit 53 Power supply means

Claims (5)

[Claims] 1. A wireless data collection device comprising: an interrogator; and a transponder which modulates an interrogation wave from the interrogator based on data and reflects the response wave as a response wave. An antenna for reflecting the interrogation wave, a detector for detecting the interrogation wave, a modulation circuit for modulating the interrogation wave, power supply means for supplying power to a connected sensor circuit, and outputs of the detector and the sensor circuit. And a transponder comprising a control circuit for controlling the power supply means and the modulation circuit. 2. The wireless data collection device according to claim 1, wherein said power supply means is shared with said transponder. 3. The wireless data collection device according to claim 1, wherein said power supply means is dedicated to said sensor circuit. 4. The wireless data collection device according to claim 1, wherein said power supply means has a power generation function. 5. The wireless data collecting apparatus according to claim 1, wherein said sensor circuit is a thermometer, a rain / snow gauge, an anemometer, an anemometer, a snow depth meter, or a pyranometer.