JP7278124B2 - pulsar receiver - Google Patents

Description

The present invention relates to a pulser receiver that wirelessly transmits measurement data acquired by an ultrasonic sensor.

For example, in various plant facilities, a large number of pipes for conveying fluids such as exhaust gas are arranged. In such pipes, thinning phenomenon due to corrosion etc. is well known, and in order to maintain the soundness of the equipment, it is important to monitor the thinning tendency of the pipes. Conventionally, fixed-point measurement of the wall thickness of pipes is carried out periodically based on various standards.

As a thickness measuring device for measuring the wall thickness of a pipe, there is one described in Patent Document 1 below.

JP 2013-190392 A

By the way, it has been proposed to constantly monitor the thinning tendency of pipes in plant facilities using measurement sensors and communication devices instead of periodic inspections. In this case, a monitoring system is formed in which a measurement sensor is attached to the pipe, a communication device is connected to the measurement sensor, and measurement data measured by the measurement sensor is transmitted to a personal computer in a management building or the like via the communication device. In this monitoring system, the measurement sensor measures the plate thickness of the pipe, and the measurement data is constantly or periodically transmitted by the communication device. Therefore, a system that consumes less power and can be used for a long period of time is required.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems and to provide a pulsar receiver that reduces power consumption.

A pulsar receiver for achieving the above object is a pulsar receiver for wirelessly transmitting measurement data acquired from an object to be measured by an ultrasonic sensor, comprising: an ultrasonic pulse generating circuit; an ultrasonic pulse receiving circuit; a digital circuit for digitally processing an ultrasonic pulse received by an ultrasonic pulse receiving circuit to generate measurement data for transmission; a communication circuit for externally transmitting the measurement data for transmission digitally processed by the digital circuit; A control circuit for controlling the pulse generating circuit, the ultrasonic pulse receiving circuit, the digital circuit, and the communication circuit, the ultrasonic pulse generating circuit, the ultrasonic pulse receiving circuit, the digital circuit, the communication circuit, and the control circuit and power from the power supply circuit to the ultrasonic pulse generating circuit, the ultrasonic pulse receiving circuit, the digital circuit, the communication circuit, and the control circuit according to the processing contents of the control circuit. and a switching circuit that individually controls the supply and stop of the

For this reason, power supply and stop to the ultrasonic pulse generation circuit, ultrasonic pulse reception circuit, digital circuit, communication circuit, and control circuit are individually controlled according to the processing content of the control circuit, so the circuits that are not in use Power supply to the device can be stopped, and power consumption can be reduced.

In the pulsar receiver of the present invention, the switching circuit supplies power to the communication circuit during measurement by the ultrasonic sensor and during power supply to the ultrasonic pulse generation circuit, the ultrasonic pulse reception circuit, and the digital circuit. It is characterized by stopping the supply.

Therefore, since power supply to the communication circuit is stopped when power is supplied to the ultrasonic pulse generation circuit, the ultrasonic pulse reception circuit, and the digital circuit, unnecessary communication circuits are stopped during measurement by the ultrasonic sensor. Thus, power consumption can be reduced.

In the pulsar receiver of the present invention, the switching circuit switches power to the ultrasonic pulse generation circuit, the ultrasonic pulse reception circuit, and the digital circuit during measurement by the ultrasonic sensor and power supply to the communication circuit. It is characterized by stopping the supply.

Therefore, when power is supplied to the communication circuit, the power supply to the ultrasonic pulse generator circuit, the ultrasonic pulse receiver circuit, and the digital circuit is stopped. Power consumption can be reduced by stopping the ultrasonic pulse receiving circuit and the digital circuit.

In the pulsar receiver of the present invention, the switching circuit supplies power from the power supply circuit to the control circuit, the digital circuit, the ultrasonic pulse receiving circuit, and the ultrasonic pulse generating circuit in this order during measurement by the ultrasonic sensor. is started, and power supply to the ultrasonic pulse generating circuit, the ultrasonic pulse receiving circuit, and the digital circuit is stopped in this order.

Therefore, power supply is started from necessary devices and power supply is stopped from unnecessary devices, so that power supply efficiency can be improved.

In the pulsar receiver of the present invention, the memory for storing the measurement data for transmission is provided when transmission of the measurement data for transmission by the communication circuit fails, and when the measurement data for transmission is transmitted by the communication circuit, the generated The measurement data for transmission and the previous measurement data for transmission stored in the memory are transmitted.

Therefore, when transmission failure occurs, the measured data for transmission is stored in memory, and when the next measured data for transmission is transmitted, the measured data for transmission this time and the previous measured data for transmission stored in memory are transmitted. Omission of transmission of credit measurement data can be prevented.

In the pulsar receiver of the present invention, the communication circuit transmits ultrasonic waveform data for one cycle out of the measurement data for transmission generated by the digital circuit.

Therefore, since the communication circuit transmits ultrasonic waveform data for one cycle, it is possible to reduce the amount of transmission measurement data to be transmitted, thereby reducing the power consumed by the communication circuit.

In the pulsar receiver of the present invention, the communication circuit transmits the measured value obtained from the ultrasonic waveform data among the measurement data for transmission generated by the digital circuit.

Therefore, since the communication circuit transmits the measured value obtained from the ultrasonic waveform data, it is possible to reduce the transmission amount of the measurement data for transmission and reduce the power consumed by the communication circuit.

In the pulsar receiver of the present invention, the service life of the battery connected to the power supply circuit is predicted according to the operating conditions of the ultrasonic pulse generating circuit, the ultrasonic pulse receiving circuit, the digital circuit, the communication circuit, and the control circuit. characterized by

Therefore, since the life of the battery is predicted according to the operation status of each circuit, the timing of battery replacement can be known in advance, and measurement accuracy can be improved by reducing the period during which measurement is not possible.

In the pulsar receiver of the present invention, a temperature sensor for detecting the temperature of the object to be measured is provided, and the measurement data for transmission generated by the digital circuit is corrected based on the temperature of the object to be measured detected by the temperature sensor. It is characterized by

Therefore, since the measurement data for transmission is corrected based on the temperature of the object to be measured, it is possible to improve the measurement accuracy.

According to the pulsar receiver of the present invention, power consumption can be reduced.

FIG. 1 is a schematic configuration diagram showing a monitoring system to which the pulsar receiver of this embodiment is applied. FIG. 2 is a schematic diagram of measurement data of an ultrasonic sensor. FIG. 3 is a schematic configuration diagram showing the pulser receiver of this embodiment. FIG. 4 is a time chart showing operating states in the pulser receiver of this embodiment. FIG. 5 is a time chart showing another operating state in the pulser receiver of this embodiment. FIG. 6 is a graph for explaining temperature correction by the pulser receiver of this embodiment.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the present invention is not limited by this embodiment, and when there are a plurality of embodiments, the present invention includes a combination of each embodiment.

FIG. 1 is a schematic configuration diagram showing a monitoring system to which the pulser receiver of this embodiment is applied, and FIG. 2 is a schematic diagram of measurement data of an ultrasonic sensor.

A monitoring system 10 of this embodiment includes an ultrasonic sensor 11, a pulsar receiver 12, and a personal computer 13 for data collection. A monitoring personal computer (not shown) may be connected to the data collecting personal computer 13 .

The ultrasonic sensor 11 is attached, for example, in close contact with the outer peripheral surface 102 of the pipe (object to be measured) 101 . In this case, the number of ultrasonic sensors 11 is not limited to one, and a plurality of ultrasonic sensors can be provided. The ultrasonic sensor 11 has a transmitter and a receiver (not shown). The ultrasonic wave S transmitted from the outer peripheral surface of the pipe 101 is reflected by the outer peripheral surface 102 of the pipe 101, and the receiver receives this reflected wave as a primary reflected wave. Also, the ultrasonic wave S emitted from the outer peripheral surface 102 of the pipe 101 is reflected by the inner peripheral surface 103 of the pipe 101, and the receiver receives this reflected wave as a secondary reflected wave. Since the secondary reflected wave is reflected by the inner peripheral surface 103 of the pipe 101 after being reflected by the outer peripheral surface 102 of the pipe 101, the receiver receives this reflected wave as the tertiary reflected wave. The pulsar receiver 12 receives the data of this reflected wave.

That is, as shown in FIG. 2, the measurement data measured by the ultrasonic sensor 11 are the first reflected wave S1, the second reflected wave S2, the third reflected wave S3, the fourth reflected wave S4, and the fifth reflected wave S4 of the ultrasonic wave S. The pulsar receiver 12 receives the reflected waves S5. Although the levels of the reflected waves S1, S2, S3, S4, S5, . . . attenuate and decrease, the intervals T1, T2, T3, T4 are the same. Intervals T1, T2, T3, T4 . . . between the reflected waves S1, S2, S3, S4, S5 . Therefore, the thickness of the pipe 101 is obtained based on the intervals T1, T2, T3, T4, .

FIG. 3 is a schematic block diagram showing the pulser receiver of this embodiment, and FIG. 4 is a time chart showing the operating state of the pulser receiver of this embodiment.

The pulsar receiver 12 includes an ultrasonic pulse generating circuit 21, an ultrasonic pulse receiving circuit (analog circuit) 22, a digital circuit 23, a control circuit 24, a communication circuit 25, a power supply circuit 26, and a switching circuit 27. have.

The ultrasonic sensor 11 is connected to the ultrasonic pulse generating circuit 21 and the ultrasonic pulse receiving circuit 22 . The ultrasonic pulse generation circuit 21 outputs a pulsed voltage to the ultrasonic sensor 11 . The ultrasonic pulse generation circuit 21 is controlled by a control circuit 24 such as the output timing of outputting a voltage.

The ultrasonic pulse receiving circuit 22 has a multiplexer 31 and an amplifier 32 . The multiplexer 31 outputs two or more inputs as one signal. That is, the multiplexer 31 outputs the pulsed voltage output from the ultrasonic pulse generation circuit 21 to the transmitters of the plurality of ultrasonic sensors 11 . Further, the multiplexer 31 receives each electric signal obtained by converting the reflected waves received from the receivers of the plurality of ultrasonic sensors 11 . Amplifier 32 amplifies the electrical signal from multiplexer 31 .

The digital circuit 23 has an AD converter 33 and a digital processing IC (FPGA) 34 . The AD converter 33 converts the analog signal from the ultrasonic pulse receiving circuit 22 into a digital signal. The digital processing IC 34 averages, for example, a plurality of digital signals, that is, measurement data from a plurality of ultrasonic sensors 11 to generate transmission measurement data. In this case, the digital processing IC 34 outputs measurement data for transmission from the plurality of ultrasonic sensors 11 or averaged measurement data for transmission to the control circuit 24 as a waveform with respect to time (see FIG. 2).

The control circuit 24 has a processing unit (CPU) 35 , a memory 36 and a temperature sensor IC 37 . A processing unit (CPU) 35 controls the digital circuit 23, the communication circuit 25, the power supply circuit 26, the switching circuit 27, and the like. The memory 36 stores measurement data for transmission digitally processed and generated by the digital processing IC 34 . The temperature sensor IC 37 receives the temperature of the pipe 101 (see FIG. 1) detected by the connected temperature sensor 14 .

The communication circuit 25 has a wireless communication module 38 and a wired communication module (USB terminal) 39 . The wireless communication module 38 and the wired communication module 39 transmit measurement data for transmission digitally processed and generated by the digital processing IC 34 and measurement data for transmission stored in the memory 36 to the outside.

The power supply circuit 26 is connected to the battery 15 and connected to the ultrasonic pulse generator circuit 21 , the ultrasonic pulse receiver circuit 22 , the digital circuit 23 , the control circuit 24 and the communication circuit 25 via the switching circuit 27 . The power supply circuit 26 supplies the power of the battery 15 to the ultrasonic pulse generating circuit 21 , the ultrasonic pulse receiving circuit 22 , the digital circuit 23 , the control circuit 24 and the communication circuit 25 . The switching circuit 27 cuts off power supply to the ultrasonic pulse generating circuit 21 , the ultrasonic pulse receiving circuit 22 , the digital circuit 23 , the control circuit 24 and the communication circuit 25 according to the processing content of the control circuit 24 . The switching circuit 27 is provided with switches 41, 42, 43, 44, and 45 between the power supply circuit 26, the ultrasonic pulse generating circuit 21, the ultrasonic pulse receiving circuit 22, the digital circuit 23, the control circuit 24, and the communication circuit 25. be done. The switching circuit 27 turns on the switches 41, 42, 43, 44, and 45 when the ultrasonic pulse generating circuit 21, the ultrasonic pulse receiving circuit 22, the digital circuit 23, the control circuit 24, and the communication circuit 25 are in use, and turns them on when not in use. The switches 41, 42, 43, 44 and 45 are turned off. This configuration reduces the power consumption of the pulser receiver 12 .

The thickness measurement of the pipe 101 by the monitoring system 10 of this embodiment has, for example, a continuous monitoring mode and a patrol mode. In the continuous monitoring mode, measurement data measured by the ultrasonic sensor 11 is wirelessly transmitted to the data collection personal computer 13, and continuous monitoring is performed by checking and analyzing the measurement data. On the other hand, in the patrol mode, measurement data measured by the ultrasonic sensor 11 is transmitted wirelessly to the data collection personal computer 13 at predetermined intervals, and the measurement data is checked and analyzed for regular monitoring.

As shown in FIGS. 3 and 4, at the time of the N-th thickness measurement of the pipe 101, the switching circuit 27 turns on the switches 44, 43, 42, and 41 in order based on the information from the control circuit 24, and the control circuit 24, digital circuit 23, ultrasonic pulse receiving circuit 22, and ultrasonic pulse generating circuit 21 are supplied with power in this order. At this time, the switch 45 is turned off to cut off the power supply to the communication circuit 25 . First, when the ultrasonic pulse generating circuit 21 outputs a voltage to the ultrasonic sensor 11, the switch 41 is turned off to cut off the power supply. Next, when the ultrasonic pulse receiving circuit 22 receives an electric signal from the ultrasonic sensor 11, the switch 42 is turned off to cut off the power supply. Subsequently, when the digital circuit 23 generates measurement data for transmission, the switch 43 is turned off to cut off the power supply. At this time, the switch 45 is turned on to start supplying power to the communication circuit 25 . Then, the communication circuit 25 transmits the measurement data for transmission to the outside. Then, the switches 44 and 45 are turned off to cut off the supply of power to the control circuit 24 and the communication circuit 25, thereby entering a standby state. After a predetermined waiting time has elapsed, the N+1-th thickness measurement of the pipe 101 is performed in the same manner as the N-th thickness measurement of the pipe 101 described above.

By the way, when the communication state of the communication circuit 25 becomes poor, the communication circuit 25 cannot transmit the measurement data for transmission to the outside. FIG. 5 is a time chart showing another operating state in the pulser receiver of this embodiment.

As shown in FIGS. 3 and 5, similarly to the above, at the time of the N-th thickness measurement of the pipe 101, the switching circuit 27 switches the switches 44, 43, 42, 41 in order based on the information from the control circuit 24. Power is supplied to the control circuit 24, the digital circuit 23, the ultrasonic pulse receiving circuit 22, and the ultrasonic pulse generating circuit 21 in this order. At this time, the switch 45 is turned off to cut off the power supply to the communication circuit 25 . First, when the ultrasonic pulse generating circuit 21 outputs a voltage to the ultrasonic sensor 11, the switch 41 is turned off to cut off the power supply. Next, when the ultrasonic pulse receiving circuit 22 receives an electric signal from the ultrasonic sensor 11, the switch 42 is turned off to cut off the power supply. Subsequently, when the digital circuit 23 generates measurement data for transmission, the switch 43 is turned off to cut off the power supply. At this time, the switch 45 is turned on to start supplying power to the communication circuit 25 . Then, the communication circuit 25 transmits the measurement data for transmission to the outside.

At this time, if the communication state of the communication circuit 25 becomes unsatisfactory, the communication circuit 25 cannot transmit the measurement data for transmission to the outside, resulting in a communication ERROR. At this time, the control circuit 24 stores the N-th measurement data for transmission generated by the digital circuit 23 in the memory 36 . After that, the switches 44 and 45 are turned off to cut off the supply of power to the control circuit 24 and the communication circuit 25, thereby entering a standby state. After a predetermined waiting time has elapsed, the N+1-th thickness measurement of the pipe 101 is performed in the same manner as the N-th thickness measurement of the pipe 101 described above. When the digital circuit 23 generates measurement data for transmission, the switch 45 is turned on to start supplying power to the communication circuit 25 . Then, the communication circuit 25 transmits the Nth measurement data for transmission stored in the memory 36 to the outside, and then transmits the N+1th measurement data for transmission to the outside. Then, the switches 44 and 45 are turned off to cut off the supply of power to the control circuit 24 and the communication circuit 25, thereby entering a standby state.

As shown in FIG. 3, the communication circuit 25 generates the measurement data for transmission generated by the digital circuit 23 as waveforms of fluctuations of the received ultrasonic waves over time, that is, a plurality of reflected waves S1 and S2 shown in FIG. , S3, S4, and S5 waveforms are transmitted to the outside. However, when a plurality of reflected wave S1, S2, S3, S4, and S5 waveforms are transmitted to the outside, the power consumption increases. Data or measurements obtained from ultrasound waveform data may be transmitted.

That is, as shown in FIGS. 2 and 3, the levels of the reflected waves S1, S2, S3, S4, S5, . Intervals T1, T2, T3, T4, . . . of S4, S5, . Therefore, the communication circuit 25 transmits only the data of the interval T1 between the reflected waves S1 and S2 and the data of the interval T2 between the reflected waves S2 and S3 to the outside. Further, the communication circuit 25 transmits only the wall thickness of the pipe 101 obtained from the intervals T1, T2, T3, T4, . . . of the reflected waves S1, S2, S3, S4, S5, .

Further, as shown in FIG. 3, the pulsar receiver 12 is connected to the power supply circuit 26 according to the operating conditions of the ultrasonic pulse generating circuit 21, the ultrasonic pulse receiving circuit 22, the digital circuit 23, the control circuit 24, and the communication circuit 25. Predict the life of the connected battery 15. Since the voltage of an alkaline battery decreases as the amount of stored electricity decreases, the life of the battery can be predicted by monitoring the voltage. On the other hand, in the lithium-ion battery, which is the battery 15 of the present embodiment, the voltage does not drop as the storage amount decreases, and the voltage suddenly drops when the storage amount drops below a predetermined value. Battery life is difficult to predict.

For example, the power consumption BCn of the battery 15 after n measurements, the power consumption CC as an indicator of the life of the battery 15, the power W consumed in one measurement, the standby power consumption per unit time N, the unit time Assuming that the power consumption M in the maintenance mode per hit, the standby time Tn between the nth and n+1th measurements, and the maintenance time tn between the nth and n+1th measurements, the following formula holds.
BCn+1=BCn+W+N*Tn+M*tn
Here, if BCn+1>CC, an alarm prompting replacement of the battery 15 is issued, and if not BCn+1>CC, n→n+1.

Further, instead of the pulsar receiver 12 predicting the life of the battery 15, the personal computer 13 for data collection or the personal computer for monitoring (not shown) may predict the life of the battery 15 as shown in FIG. However, since the data collecting personal computer 13 (monitoring personal computer) cannot grasp when the pulsar receiver 12 entered the maintenance mode, it predicts the power consumption in the maintenance mode and considers the predicted value of the power consumption. to set the power consumption CCp, which is an index of the life of the battery 15 . For example, the power consumption BCn of the battery 15 after n measurements, the power consumption CCp as an indicator of the life of the battery 15, the power W consumed in one measurement, the standby power consumption per unit time N, the n-th and the standby time Tn between the (n+1)th measurements, the following formula holds.
BCn+1=BCn+W+N×Tn
Here, if BCn+1>CCp, an alarm prompting replacement of the battery 15 is issued, and if not BCn+1>CCp, n→n+1.

In addition, the monitoring system 10 of the present embodiment measures the wall thickness based on the propagation time of ultrasonic waves propagating inside the pipe 101. speed) fluctuates according to the temperature of the pipe 101 . That is, when the temperature of the pipe 101 rises, the propagation speed of the ultrasonic wave decreases, resulting in a longer propagation time and an error in the measurement of the thickness of the pipe 101 . FIG. 6 is a graph for explaining temperature correction by the pulser receiver of this embodiment.

As shown in FIGS. 3 and 6 , the ultrasonic sensor 11 is provided with a temperature sensor (thermocouple) 14 that detects the temperature of the outer peripheral surface 102 of the pipe 101 . The control circuit 24 corrects the measurement data for transmission generated by the digital circuit based on the temperature of the pipe 101 detected by the temperature sensor 14 . That is, as indicated by the solid line in FIG. 6, when the temperature of the pipe 101 fluctuates, the transmission measurement data measured by the ultrasonic sensor 11 and generated by the digital circuit 23 changes to the pipe 101 as indicated by the dotted line in FIG. It fluctuates in proportion to the temperature of In this embodiment, the control circuit 24 corrects the transmission measurement data generated by the digital circuit based on a preset correction value. Then, as indicated by the one-dot chain line in FIG. 6, the measurement data for transmission after correction becomes constant regardless of the temperature of the pipe 101 . The correction value for correcting the measurement data for transmission is calculated in advance from the deviation between the measurement data for transmission before correction based on the temperature of the pipe 101 and the measurement data for transmission after correction based on an incident or simulation. It is preferable to keep

As described above, in the pulsar receiver of the present embodiment, the ultrasonic pulse generator circuit 21, the ultrasonic pulse receiver circuit 22, and the ultrasonic pulse received by the ultrasonic pulse receiver circuit 22 are digitally processed and measured for transmission. A digital circuit 23 that generates data, a communication circuit 25 that transmits measurement data for transmission digitally processed by the digital circuit 23 to the outside, an ultrasonic pulse generation circuit 21, an ultrasonic pulse reception circuit 22, a digital circuit 23, and a communication circuit. 25, a power supply circuit 26 that supplies power to the ultrasonic pulse generating circuit 21, the ultrasonic pulse receiving circuit 22, the digital circuit 23, the communication circuit 25, and the control circuit 24, and the processing contents of the control circuit 24. A switching circuit 27 for individually controlling the supply and stop of power supply from the power supply circuit 26 to the ultrasonic pulse generating circuit 21, the ultrasonic pulse receiving circuit 22, the digital circuit 23, the communication circuit 25, and the control circuit 24 according to the .

Therefore, the supply and stop of power supply to the ultrasonic pulse generation circuit 21, the ultrasonic pulse reception circuit 22, the digital circuit 23, the communication circuit 25, and the control circuit 24 are individually controlled according to the processing contents of the control circuit 24. , power supply to circuits not in use can be stopped, and power consumption can be reduced.

In the pulsar receiver of this embodiment, the switching circuit 27 supplies power to the communication circuit 25 during measurement by the ultrasonic sensor 11 and during power supply to the ultrasonic pulse generation circuit 21, the ultrasonic pulse reception circuit 22, and the digital circuit 23. supply of Therefore, power consumption can be reduced by stopping the communication circuit 25 that is unnecessary during measurement by the ultrasonic sensor 11 .

In the pulsar receiver of this embodiment, the switching circuit 27 supplies power to the ultrasonic pulse generating circuit 21, the ultrasonic pulse receiving circuit 22, and the digital circuit 23 during measurement by the ultrasonic sensor 11 and power supply to the communication circuit 25. supply of Therefore, power consumption can be reduced by stopping the ultrasonic pulse generation circuit 21, the ultrasonic pulse reception circuit 22, and the digital circuit 23, which are unnecessary when transmitting the measurement data for transmission.

In the pulser receiver of this embodiment, the switching circuit 27 supplies power in the order of the power supply circuit 26, the control circuit 24, the digital circuit 23, the ultrasonic pulse receiving circuit 22, and the ultrasonic pulse generating circuit 21 during measurement by the ultrasonic sensor 11. Power supply is started, and power supply to the ultrasonic pulse generating circuit 21, the ultrasonic pulse receiving circuit 22, and the digital circuit 23 is stopped in that order. Therefore, power supply is started from necessary devices and power supply is stopped from unnecessary devices, so that power supply efficiency can be improved.

In the pulsar receiver of the present embodiment, the memory 36 is provided to store the measurement data for transmission when transmission of the measurement data for transmission by the communication circuit 25 fails. The measurement data for transmission that has been received and the measurement data for transmission that was previously stored in the memory 36 are transmitted. Therefore, when transmission of the measured data for transmission is defective, it is stored in the memory 36, and when the next measured data for transmission is transmitted, the measured data for transmission this time and the previous measured data for transmission stored in the memory 36 are transmitted. , transmission omission of transmission measurement data can be prevented.

In the pulsar receiver of this embodiment, the communication circuit 25 transmits one cycle of ultrasonic waveform data among the measurement data for transmission generated by the digital circuit 23 . Therefore, it is possible to reduce the power consumed by the communication circuit 25 by reducing the transmission amount of the measurement data for transmission.

In the pulsar receiver of the present embodiment, the communication circuit 25 transmits the measurement value obtained from the ultrasonic waveform data among the measurement data for transmission generated by the digital circuit 23 . Therefore, it is possible to reduce the power consumed by the communication circuit by reducing the transmission amount of the measurement data for transmission.

In the pulsar receiver of this embodiment, the life of the battery 15 connected to the power supply circuit 26 is determined according to the operating conditions of the ultrasonic pulse generating circuit 21, the ultrasonic pulse receiving circuit 22, the digital circuit 23, the communication circuit 25, and the control circuit 24. to predict. Therefore, it is possible to know in advance when to replace the battery 15 and reduce the period during which measurement is not possible, thereby improving the measurement accuracy.

In the pulsar receiver of this embodiment, the temperature sensor 14 for detecting the temperature of the pipe 101 is provided, and the measurement data for transmission generated by the digital circuit 23 is corrected based on the temperature of the pipe 101 . Therefore, it is possible to improve the measurement accuracy.

Although the pulsar receiver of the present invention is applied to measure the wall thickness of the pipe 101 in the above embodiment, it is not limited to this application. For example, it can be applied to the work of measuring the position of the liquid surface of the fluid inside a pipe or a storage tank, or measuring the position of a damaged part of a member.

REFERENCE SIGNS LIST 10 monitoring system 11 ultrasonic sensor 12 pulsar receiver 13 personal computer for data collection 14 temperature sensor 15 battery 21 ultrasonic pulse generating circuit 22 ultrasonic pulse receiving circuit (analog circuit)
23 digital circuit 24 control circuit 25 communication circuit 26 power supply circuit 27 switching circuit 31 multiplexer 32 amplifier 33 AD converter 34 digital processing IC
35 processor 36 memory 37 temperature sensor IC
38 wireless communication module 39 wired communication module 41, 42, 43, 44, 45 switch 101 piping (object to be measured)
102 outer peripheral surface 103 inner peripheral surface S1, S2, S3, S4, S5 reflected waves T1, T2, T3, T4 intervals

Claims (6)

A pulsar receiver that wirelessly transmits measurement data obtained from an object to be measured by an ultrasonic sensor,
an ultrasonic pulse generating circuit;
an ultrasonic pulse receiving circuit;
a digital circuit that digitally processes the ultrasonic pulse received by the ultrasonic pulse receiving circuit to generate measurement data for transmission;
a communication circuit for externally transmitting measurement data for transmission digitally processed by the digital circuit;
a control circuit that controls the ultrasonic pulse generation circuit, the ultrasonic pulse reception circuit, the digital circuit, and the communication circuit;
a power supply circuit that supplies power to the ultrasonic pulse generation circuit, the ultrasonic pulse reception circuit, the digital circuit, the communication circuit, and the control circuit;
Individually controlling supply and stop of power supply from the power supply circuit to the ultrasonic pulse generating circuit, the ultrasonic pulse receiving circuit, the digital circuit, the communication circuit and the control circuit in accordance with the processing contents of the control circuit. a switching circuit;
with
During measurement by the ultrasonic sensor, the switching circuit starts supplying power from the power supply circuit to the control circuit, the digital circuit, the ultrasonic pulse receiving circuit, and the ultrasonic pulse generating circuit in this order. Power supply is stopped in the order of the pulse generation circuit, the ultrasonic pulse reception circuit, and the digital circuit,
When the digital circuit generates the measurement data for transmission, power is supplied to the communication circuit, and when the communication circuit transmits the measurement data for transmission to the outside, power is supplied to the control circuit and the communication circuit. is shut off and placed in a standby state,
A pulsar receiver characterized by: A memory for storing the measurement data for transmission is provided when transmission of the measurement data for transmission by the communication circuit fails, and when the measurement data for transmission is transmitted by the communication circuit, the measurement data for transmission generated at that time and the memory are provided. 2. The pulsar receiver according to claim 1, wherein the previous transmission measurement data stored in the pulsar receiver is transmitted. 2. The pulsar receiver according to claim 1, wherein said communication circuit transmits one cycle of ultrasonic wave waveform data among transmission measurement data generated by said digital circuit. 2. The pulsar receiver according to claim 1, wherein said communication circuit transmits a measurement value obtained from ultrasonic waveform data among transmission measurement data generated by said digital circuit. The life of the battery connected to the power supply circuit is predicted according to the operation status of the ultrasonic pulse generating circuit, the ultrasonic pulse receiving circuit, the digital circuit, the communication circuit, and the control circuit. A pulsar receiver according to any one of claims 1 to 4. 3. A temperature sensor for detecting the temperature of the object to be measured is provided, and the measurement data for transmission generated by the digital circuit is corrected based on the temperature of the object to be measured detected by the temperature sensor . A pulsar receiver as claimed in any one of claims 1 to 5 .

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