JPH08289376A - Equipment operation data measurement monitoring system - Google Patents

Abstract

(57) [Summary] [Purpose] To realize a highly accurate measurement and monitoring system by keeping the collected data and commands from each sensor in high quality without adversely affecting the equipment in the field by noise. To reduce the labor of workers involved in data measurement and improve safety. [Structure] A sensor block 10 having sensors 11a to 11d for collecting operation data such as temperature, vibration, and current of equipment on site, and data for analyzing the operation state of the equipment by processing the operation data and monitoring the data. A data processing block 30 including a processing unit 31, and a transmission block for transmitting and receiving the operation data and commands necessary for data collection between the sensor block 10 and the data processing block 30 by wireless communication using a spread spectrum communication method. And 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an equipment operation data measurement / monitoring system for measuring and monitoring operation data of various equipment such as pumps, motors, cranes, etc. provided in, for example, nuclear power plants, thermal power plants, hydraulic power plants, and oil plants. In particular, the present invention relates to a measurement and monitoring system used for performing a test operation of a pump, a motor, etc. after a periodic inspection of a nuclear power plant etc. and confirming the soundness of equipment from test operation data such as temperature, vibration and current.

[0002]

2. Description of the Related Art Normally, in a nuclear power plant, after a periodic inspection, a test operation of a pump, a motor, etc. is performed to measure and record voltage, current, temperature, vibration, etc. before and after the power is turned on, and operation data of these is recorded. After confirming the soundness of the equipment based on the above, the equipment is connected to the grid. Here, the operation data is collected by several workers carrying a plurality of sensors according to the measurement items and entering the site, and attaching each sensor to a device such as a pump or a motor to visually observe the indicated value. ,
The measurement data is recorded in a document, and such data collection work is repeatedly performed at predetermined time intervals.

For example, in measuring the temperature of a device, the operation of fixing a rod-shaped thermometer to the casing of the device with putty or the like and reading the indicated value is repeated at intervals of 5 to 10 minutes. Regarding the current of the equipment, the operator uses the peak hold function of the clamp meter to read the peak value of the starting current of each phase within 1-2 seconds after the power is turned on, and then confirms that the temperature has stabilized by the above temperature measurement. After that, the current during steady operation is measured.

The vibration of the equipment is measured at intervals of 30 minutes immediately after startup and during steady operation after the rotation speed of the motor is stabilized. Specifically, a vibrometer is applied to several points in the axial direction of the equipment. Vibration data (needle deflection) in the V (vertical), H (horizontal), and A (axis) directions are measured, and the average value is visually read. As information other than the collected data, if abnormal noises, odors, stains, etc. occur at the site, these are also recorded as necessary. The operation data collected in this way is organized after the test operation is completed, and a report is created, and the state (health / fault, etc.) of various devices is analyzed based on this report.

[0005]

According to the above-mentioned conventional technique, an operator must enter the site every time operation data is collected or continuously, which requires a lot of labor and time, and various Carrying and mounting the sensor was extremely complicated. In addition, depending on the site, because it goes in and out of the high dose equivalent area, this leads to an increase in dose equivalent, and when the equipment is installed at a high place, it is necessary to reciprocate to the equipment and install sensors around the equipment. Measurement work is dangerous. Furthermore, since the equipment under operation is the measurement target,
There was a risk of electric shock and injury to workers, and there was room for improvement in terms of safety.

In addition, temperature data and vibration data are 5 to 1
Since the sample data has a relatively long time interval such as 0 minutes or 30 minutes, it is not possible to grasp a continuous change tendency or a sudden change in the data that has occurred between measurement points. Further, some sensors require some tips and skills for mounting, and there is a possibility that the mounting state varies depending on the worker, so there is a problem that the collected data lacks reliability. . At the same time, data reading mistakes, recording mistakes, transcription mistakes, etc. are fully expected.

Therefore, ideally, it is desirable to always attach various sensors to the equipment and process the measured data of these with a predetermined cycle by wire transmission or wireless transmission communication to the outside of the site. However, it is uneconomical to lay a cable for collecting data on-site only for the trial run of the equipment after the completion of the periodic inspection, and a lot of labor is required for the work. Further, when the operation data is wirelessly communicated, there is a risk that the communication radio waves may cause noise to cause various equipments (for example, a radiation monitor) to malfunction, and as a result, the entire equipment may be disturbed. Furthermore, there is a problem to be solved such as so-called multipath fading or superposition of noise from the outside, which deteriorates the quality of transmitted / received data and prevents accurate measurement and monitoring.

The present invention has been made to solve the above-mentioned problems, and its purpose is to attach a plurality of sensors to a device to be measured, and to collect operation data and measurement operation collected by these sensors. Spread spectrum (hereinafter, as a wireless communication method for transmitting and receiving necessary commands)
By using the communication method (abbreviated to SS as necessary), the labor of workers is reduced, safety and economy are improved, and malfunctions of other equipment and deterioration of quality of transmitted / received data are prevented. An object of the present invention is to provide a device operation data measurement / monitoring system capable of measuring and monitoring accuracy.

[0009]

In order to achieve the above-mentioned object, the invention according to claim 1 is a sensor block provided with a sensor for collecting operation data such as temperature, vibration, and current of equipment in the field; Spread spectrum communication of the operation data and commands necessary for data collection between the sensor processing block and the data processing block, which includes a data processing unit that processes the operation data and analyzes the operation state of the device. And a transmission block for transmitting and receiving by wireless communication according to the method. According to a second aspect of the present invention, in addition to the above configuration, the sensor block is provided with a data input section capable of inputting detection data based on the five senses of an operator.

[0010]

In the present invention, the operation data collected by the various sensors and the command for starting, ending the measurement, data transmission, etc. are transmitted and received by the SS communication, so that it is not affected by the noise from other equipments. Realize a communication system without multipath fading or noise interference to other equipment. Also, since various sensors can be attached to the equipment and operation data can be automatically collected from the outside of the site at a predetermined cycle, the labor of the worker associated with the measurement work can be reduced, and the exposure and radiation during operation can be reduced. The safety of the device is improved.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a functional block diagram showing the configuration of the embodiment,
This equipment operation data measurement and monitoring system includes a sensor block 10, a transmission block 20, and a data processing block 3.
0.

In the sensor block 10, 11a is a temperature sensor such as a thermocouple and a radiation thermometer, 11b is a vibration sensor such as an electrodynamic vibrometer, 11c is a current sensor such as a clamp type current transformer, and 11d is also for a meter. It is a voltage sensor such as a transformer, and these sensors can be attached to a device (not shown) such as a motor or a pump, which is a measurement target. The type of sensor is not limited to the above, and a sensor for detecting the pump discharge pressure, the flow rate, or the like may be provided according to the measurement item.
Further, the temperature sensor 11a may include a room temperature sensor.

Reference numeral 12 is an A / D converter, which is used for each sensor 11.
The analog output signals a to 11d are appropriately amplified and converted into digital signals. Reference numeral 14 denotes a control unit including a CPU, which receives a command from a data processing unit 31 described later and transmits the output data of the A / D conversion unit 12 and the data input unit 13 described below to the data processing unit 31 side. Control actions for executing.

The data input unit 13 is composed of, for example, a notebook personal computer. The data input unit 13 is used to identify the number data and current of the device being measured, the identification data of each phase of the power supply (U, V, W phases) at the time of voltage measurement, the instruction value read from the meter of the device, and Input data to the worker as necessary, which is data detected by the five senses of the worker other than those detected by the sensors 11a to 11d and in which an unpleasant odor, abnormal sound, dirt on the device, etc. are associated with an appropriate code. It is for making it.

Next, the transmission block 20 includes a communication section 21 installed near equipment such as a motor and a pump, and a communication section 22 installed outside the vicinity of these equipment (for example, outside the pump room). And these communication parts 2
Data for a plurality of channels and commands such as measurement start and end are wirelessly transmitted and received between the first and second stations by the SS communication method.

FIG. 2A shows the main parts of the communication units 21 and 22. Reference numerals 211 and 221 denote SS modulation / demodulation units, 212 and 222 denote PN code (reference code or pseudo code) generation units, 223. Is a filter such as a bandpass filter. Here, the SS modulation / demodulation unit 211 and the PN code generation unit 212 are provided in the communication unit 21 near the device,
On the other hand, the SS modulator / demodulator 221, the PN code generator 222, and the filter 223 are provided in the other communication unit 22.

The principle of SS communication in this embodiment will be described with reference to FIGS. 2 (a) and 2 (b). The collected data by the sensors 11a to 11d and the input data from the data input unit 13 (herein, collectively referred to as operation data) are PN codes from the PN code generation unit 212 in the SS modulation / demodulation unit 211 in the communication unit 21. Is used for Fourier transform (SS modulation). 2 (b) is the original operation data, and is the SS modulated signal after the Fourier transform. The SS-modulated signal thus spectrum-spread over a wide band is transmitted to the communication unit 22 via the antenna.

In this communication section 22, as shown in the figure, noises from other devices and interference waves due to multipath fading are superimposed on the signal received via the antenna. This received signal is input to the SS modulator / demodulator 221 and Fourier inverse transform (correlation processing) is performed using the PN code from the PN code generator 222 that is the same as and synchronized with the transmitter side, and becomes an SS demodulated signal as shown in the figure. .

At this time, since the noise and the interference wave are not subjected to SS modulation, the bandwidth is diffused by the SS demodulation process from to, and the noise and the interference wave are converted into noise with extremely low power density. On the other hand, although the power density of the operation data itself is small, it has a large level in a narrow band. Therefore,
By passing this SS demodulated signal through the filter 223, only the operation data can be taken out as shown in. This operation data is appropriately amplified and sent to the data processing unit 31 described later to be used for analyzing the operation state of the device. Although not described in detail, commands for starting and ending a series of measurement operations and performing data transmission are also transmitted from the communication unit 22 to the communication unit 21 by the SS communication.

According to this SS communication system, the influence of noise and multipath fading can be removed on the receiving side, and since the power density of the transmission signal is low, it becomes a noise source or crosstalk to surrounding equipment. There is no inconvenience that causes In the present embodiment, for example, the radio frequency band is 2.4 GHz and the antenna power is 10 mW /
MHz or less, half-duplex communication method, communication speed 256
Kbps.

Next, the data processing block 3 in FIG.
0 is configured by a data processing unit 31, a file device 32, and a printer 33. The data processing unit 31 is composed of a notebook personal computer or the like, and inputs a command for collecting operation data, edits the operation data output from the communication unit 22, displays the operation data digitally, graphs, communication control, file control, and prints. Control and, if necessary, voice input / output control and the like. The file device 32 is a hard disk or the like for storing the collected operation data and the like, and the printer 33 is for printing and outputting the operation data and the like in a form.

FIG. 3 shows a usage state of this embodiment, and is an example in which test operation data of a device 61 such as a motor installed in the pump room 40 at the site is measured. In the pump chamber 40, 15 is the A / D converter 1 in FIG.
2. Control that combines the control unit 14 and the communication unit 21
It is a communication unit.

Reference numeral 50 denotes an office room outside the pump room, which is separated by walls 42 and 52, and the communication section 22 provided in the office room 50.
Operation data and commands are transmitted / received between the control and communication unit 15 and the control / communication unit 15 by SS communication. In the office 50, the file device 32 and the printer 3 shown in FIG.
3 is not shown for convenience. Here, the operation data processed by the data processing unit 31 in the office 50 may be transmitted to a higher-order host computer via the communication unit 22.

In the illustrated example, the operator 41 in the pump room and the operator 51 in the office room are equipped with the voice input / output devices 16 and 34, each of which is composed of a microphone and headphones (speakers). , Information such as reports can be transmitted to each other. Sending and receiving this voice data,
It can be performed by SS communication.

Here, an example will be described in detail with respect to the measuring method, the processing method and the like of each operation data. First, regarding the temperature data, the surface temperature and the room temperature of the device 61 are measured at intervals of 1 to 2 seconds by the plurality of temperature sensors 11a except during the measurement of the starting current and the vibration, and to the office 50 side each time. Send. In the office 50, the data processing unit 31 sets a time interval (for example, 5 to 10 minutes) longer than the data transmission interval described above to display a trend, a simultaneous display with a previous measurement value, and a set value for alarm output. Make comparisons.

The current data is measured for each phase (U, V, W phase) of the power source of the equipment 61 at the time of startup and steady operation. At the time of startup, in order to reliably detect the peak value of the startup current, the measurement data of the current sensor 11c is measured for several msec.
It samples at intervals and sends these current data through the buffer at 1 second intervals. The entire start-up current measurement time is a few seconds after the power is turned on. During this period, temperature changes can be ignored, so temperature data is not transmitted.

At the time of steady operation, it is sufficient to sample and transmit at a cycle longer than the above time interval, and these starting current and steady current are displayed and output by the data processing unit 31. During steady operation, current data as well as temperature data and vibration data can be transmitted at the same time.

As for the vibration data, immediately after the start-up, vibrations in the V (vertical), H (horizontal), and A (axis) directions at a plurality of measurement points of the equipment 61 are measured at intervals of several tens of microseconds.
Sampling is performed for 2 seconds, and these vibration data are collectively transmitted via the buffer. In the data processing unit 31, the average value, peak value, PP (peak-peak) as necessary
Values are calculated, and arithmetic processing such as fast Fourier transform is performed and the results are displayed and output.

Next, in Table 1, the temperature sensor 11a, the vibration sensor 11b and the current sensor 11c having a display window are used. Processing unit 31
It shows the result of comparison with the measured value (screen display value) displayed on the screen.

[0030]

[Table 1]

As is clear from Table 1, the indicated value of each sensor and the screen display value are almost the same within the range of accuracy of the A / D converter, and SS communication is used for wireless communication of operation data. However, it was confirmed that there was no problem in terms of accuracy.

Further, the control / communication unit 1 in FIG.
A plurality of radiation monitors (γ-ray monitors) were placed around 5 and the difference with the background value of the monitor output was investigated at the start of transmission of operation data, during transmission, and after the end of transmission. Was not seen. That is, it can be seen that the radio wave used for SS communication does not cause noise interference to equipment such as a radiation monitor. Furthermore, even if there is a device (welding machine, etc.) that is a source of noise around the control / communication unit 15, SS communication is not affected at all, and the device can be operated over a considerable distance regardless of the arrangement of the device or the structure of the building. It has also been confirmed that data can be transmitted accurately.

[0033]

INDUSTRIAL APPLICABILITY As described above, the present invention is present in the field because the operating data such as the temperature, vibration, and current of the equipment and the commands such as the start, end, and data transmission of the measurement are transmitted and received by the SS communication. Not affected by noise from other equipment,
It is possible to realize a highly reliable measurement and monitoring system without multipath fading or noise interference to other equipment. Further, since a communication cable is not required, it is economical, and the cable laying work is not complicated in a relatively poor field environment such as a nuclear power plant or various plants.

Furthermore, since various sensors can be attached to the equipment and operation data can be automatically collected from the outside of the site at a predetermined cycle, an operator must enter the site and attach the sensor each time measurement is performed. It is not necessary to perform the actual measurement work, and the labor of the worker is reduced, and the safety of the device during exposure and during operation is dramatically improved. Furthermore, it is possible to construct a highly accurate measurement and monitoring system that enables continuous measurement in a short cycle without a measurement error caused by variations in the mounting state of temperature sensors and the like.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an SS communication system according to an embodiment.

FIG. 3 is a diagram showing a usage state of the embodiment.

[Explanation of symbols]

 10 sensor block 11a-11d sensor 12 A / D converter 13 data input unit 14 control unit 15 control / communication unit 16 voice input / output device 20 transmission block 21,22 communication unit 211,221 SS modulation / demodulation unit 212,222 PN code generation Part 223 Filter 30 Data processing block 31 Data processing part 32 File device 33 Printer 34 Voice input / output device 40 Pump room 41 Worker 42 Wall 50 Office room 51 Operator 52 Wall 61 Equipment

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Mizutani Oshima, Oi-machi, Oi-gun, Fukui Kaneden Kogyo Co., Ltd. Oi Sales Office (72) Inventor Katsunori Nishii Oi-machi, Oi-gun, Fukui Oden Kanko Kogyo Co., Ltd. Ohan Sales In-house (72) Yuuki Fujimoto 1-21-6-306, Kojima-cho, Chofu-shi, Tokyo (72) Inventor Yu Yoshiki Seki 5-3, Kojimachi, Chiyoda-ku, Tokyo Inside S & Co., Ltd. (72) Invention Person Takanori Toyokichi 1-1, Tanabe Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Electric Co., Ltd. (72) Inventor Kozo Ogushi 1-1, Tanabe Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Electric Co., Ltd.

Claims (2)

[Claims] 1. A sensor block having a sensor for collecting operation data such as temperature, vibration, and current of equipment on site, and a data processing unit for processing the operation data to analyze and monitor the operation state of the equipment. And a transmission block for transmitting and receiving the operation data and commands necessary for data collection by wireless communication using a spread spectrum communication method between the sensor block and the data processing block. Equipment operation data measurement and monitoring system characterized by. 2. The equipment operation data measurement / monitoring system according to claim 1, wherein the sensor block includes a data input unit capable of inputting detection data based on the five senses of an operator. system.