JP4950603B2 - Plant pressure transmitter inspection system - Google Patents

Description

  The present invention relates to a plant pressure transmitter inspection system for detecting main control process values of a plant such as pressure and liquid level.

  Conventionally, among the equipment that makes up a plant, when collecting data for periodic inspections, etc., in the pressure system such as pressure, liquid level, flow rate, etc. It is common to perform inspections by connecting measuring instruments.

  In this case, the operator's experience is a critical factor in the technology for generating the reference pressure, which may cause problems in the time required for inspection, the calibration accuracy of the instrument, the accuracy of the data, etc. Data transfer mistakes may occur.

  In the past, there has been no automated pressure-based instrument inspection system that does not depend on the experience and skill of workers.

In addition, the system which enables the diagnosis of the sensor of a differential pressure and a pressure transmitter is proposed (for example, refer patent document 1).
JP-A-8-247881

  Regarding the pressure transmitter inspection method described above, the time efficiency at the time of inspection and the accuracy of inspection data may be affected by the power, experience and technology of the inspector. There was no system that automatically checked the history and the inspection results on site.

  The present invention has been made to solve the above-described problems, and provides a method for collecting inspection data that does not depend on the experience and technology of the inspector. It is an object of the present invention to provide a plant pressure transmitter inspection system that can be browsed and automatically recorded as electronic data.

In order to achieve the above object, in the present invention, an instrument calibration device terminal applied at the time of inspection of a pressure transmitter constituting a plant, automatic capture of instrument specifications of the pressure transmitter, monitoring of pressurized pressure, automatic inspection data Judgment means for automatic determination of sampling and inspection results, remote server for instrument calibration that creates a result table based on the determination results, and management means for centralized management of instrument specifications, inspection results and inspection history, The instrument calibration device terminal has determination means for automatically taking in the instrument specifications of the pressure transmitter, monitoring pressurized pressure, collecting automatic inspection data, and automatically determining inspection results, and the remote server controls the management means. It has the meter calibration device terminal captures the pressure value from the digital manometer connected to a pressure source supplying a pressure to said pressure transmitter, measuring the rise and fall of the rate of pressure To provide a pressure transmitter inspection system for plants, characterized in that a means for transmitting visual and sound operator to Into.

  According to the present invention, regarding the method of collecting inspection data that does not depend on the experience and technology of the inspector, the data can be collectively managed in a database, and can be browsed and automatically recorded as electronic data. Become.

  Hereinafter, an embodiment of a pressure transmitter inspection system for a plant according to the present invention will be described with reference to the drawings.

  1 and 2 are configuration diagrams showing a plant pressure transmitter inspection system according to a first embodiment of the present invention. In this embodiment, when the pressure transmitter 8 in the plant 10 is inspected, the pressure transmitter inspection system is used to perform wireless communication between the instrument calibration device terminal 1a (personal computer) and the instrument calibration device server 1b (personal computer). A system for performing inspection or updating inspection data with the memory card 11 will be described.

  FIG. 1 shows a work place or office 9 in which all specifications and measurement data of measurement equipment in the plant are stored and managed. FIG. 2 shows an inspection of the pressure transmitter 8 in the plant by the instrument calibration device terminal 1a. The state in which the output value of the pressure transmitter 8 is automatically measured while monitoring the pressure value is shown.

  As shown in FIG. 2, in the present embodiment, a pressure guiding pipe is connected to a pressure transmitter 8 that is a field-installed instrument in the plant 10, and the pressure transmitter 8 is inspected when the pressure transmitter 8 is inspected. The pressure generating source 5 is connected to the pressure application point using a hose 14 or the like, and the hose 14 is also connected to the digital manometer 2.

  Then, the current-voltage converter 4 is attached to the electric signal extraction circuit 15 of the pressure transmitter 8 and a voltage is applied to the digital multimeter 3. The digital manometer 2 and the digital multimeter 3 transmit a digital value to the instrument calibration apparatus terminal 1a through an interface mounted on each measuring instrument.

  The instrument calibration device terminal 1a is connected to a transceiver (PHS, wireless LAN, DSL-LAN) 6 using DSL-LAN using a plant premises PHS, which is an existing technology, a wireless LAN, or a temporary telephone line, and communicates. In addition to the function of providing a function, in a situation where communication is impossible, the memory card 11 can be used to exchange data between the instrument calibration device servers 1b. The above equipment is constructed on the cart “Okamochi” 7 so that it can be easily moved on site.

  In addition, as shown in FIG. 1, in the work place or office 9, the instrument calibration apparatus server 1b uses a plant premises PHS line which is an existing technology, or a DSL-LAN using a wireless LAN or a temporary telephone line. The transmitter / receiver 6 is connected, and in addition to the function of providing a communication function, the memory card 11 can be used to update data between the instrument calibration device terminals 1a.

  The functions and roles played by each device in actual measurement are as follows.

For example, the instrument calibration device terminal 1 a takes in the pressure value from the digital manometer 2, and when operating the pressure generation source 5, the pressure rise, measurement point, and the optimum operation speed when descending are visually and sounded to the worker. Tell.

When the measurement point is reached, the pressure transmitter output signal from the digital multimeter 3 is automatically taken in as inspection data. After data collection, pass / fail judgment is performed on the terminal . Prior to the start of the test, it is desirable to automatically set the measurement range and the like because the specification for each instrument to be measured is taken in from the instrument calibration device server 1b using the communication function. It also has a monitoring function for checking the zero point of the digital manometer 2 at the start of measurement.

  The meter calibration device server 1b is a meter specification for each meter such as Tag No, model, measurement range, temperature correction value, density correction value, specific gravity, set value, allowable accuracy, installation location, etc. of each meter used in the plant 10. Is managed as a database. The instrument calibration device server 1b also has a function of creating a result table of the inspected pressure transmitter 8 from data such as past inspection history, inspection data, and used measuring instrument information.

  The digital manometer 2 is a measuring instrument that can read a pressure signal as a digital value. In the configuration of this embodiment, an interface card is mounted, and the pressure measurement value is transmitted to the instrument calibration device terminal 1a by the transceiver 6. Transmit as a radio signal.

  The digital multimeter 3 reads the output signal of the pressure transmitter 8 as a digital value via the current-voltage converter 4. This digital multimeter 3 is equipped with an interface card, and transmits the pressure transmitter output signal value to the instrument calibration device terminal 1a. In addition, it is desirable to select the measuring instrument to use the thing of a high-speed multichannel specification.

  The current-voltage converter 4 converts the current output signal (4 mA to 20 mA) of the pressure transmitter 8 into a voltage, and applies this voltage to the digital multimeter 3.

  The pressure generation source 5 is a combination of, for example, a manual pump, a nitrogen cylinder, an adjustment valve set, and the like, and an operator operates the pressure generation at the time of inspection in the same manner as before.

  The transmitter / receiver 6 includes an interface for communication using a plant-premises PHS line which is an existing technology, a wireless LAN, or a DSL-LAN using a temporary telephone line.

  The cart 7 is loaded with all the devices used at the above-mentioned site, and is intended to save labor for the movement at the site. In any case, it is desirable to have a level and a horizontal adjustment mechanism (adjustment feet) so that there is no hindrance during measurement. In the present embodiment, the pressure transmitter 8 refers to a measuring device that detects main control process values of the plant such as pressure, liquid level, and flow rate.

  As shown in FIG. 1, the work place or office 9 is applied as an installation place of the instrument calibration data server 1b. Since it operates as a server, it corresponds to a plurality of simultaneous operations of the instrument calibration device terminal 1a. Since relaying in a LAN configuration is also possible, remote management and monitoring are possible.

  In the case where communication between the instrument calibration device terminal 1a and the instrument calibration device server 1b is impossible due to the operation status of the pressure transmitter inspection at the site in the plant 10, the memory card 11 is used. The data is updated between the devices.

  Thus, according to the first embodiment of the present invention, in the inspection of the pressure transmitter 8, it is not necessary to carry individual specifications (range, temperature correction, head correction, specific gravity of the measured object, etc.) with paper, and data A maintenance inspection and support system that eliminates mistakes during posting and human error and can save labor can be constructed.

  3 and 4 show a second embodiment of the present invention. In particular, FIG. 4 shows a situation where the pressure transmitter 8 which is a field-mounted instrument in the plant 10 according to the present embodiment is inspected at the same time by simultaneously pressurizing the pressure transmitter 8 in the same range. Is shown. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals in FIGS. 3 and 4 as in FIGS.

  3 and 4, when the pressure transmitter 8 in the plant 10 is inspected, wireless communication is performed between the instrument calibration device terminal 1a and the instrument calibration device server 1b using the pressure transmitter inspection system, or A configuration for performing inspection by updating the inspection data in the memory card 11 is shown.

  FIG. 3 shows a work place or office 9 in which all the specifications and measurement data of the measuring instruments in the plant are stored and managed. Further, FIG. 4 shows a state in which a plurality of output values of the pressure transmitter 8 are automatically measured simultaneously while monitoring the pressure value pressurized by the instrument calibration device terminal 1a for the inspection of the pressure transmitter 8 in the plant. Yes.

  According to the second embodiment of the present invention, in simultaneous inspection of the pressure transmitter 8, there is no need to carry individual specifications (range, temperature correction, head correction, specific gravity of the measured object, etc.) with paper, and at the time of data transfer Since there are no mistakes or human error, etc., and multiple units can be automatically measured simultaneously, it is possible to construct a pressure transmitter inspection system for a plant that can further save labor.

  5 and 6 show that when the pressure transmitter 8 in the plant 10 according to the third embodiment of the present invention is inspected, the pressure transmitter inspection system is used between the instrument calibration device terminal 1a and the instrument calibration device server 1b. A method is shown in which wireless communication is performed or inspection data is updated by the memory card 11 for inspection.

  FIG. 5 is a block diagram showing the inside of the work place or office 9 where all the specifications and measurement data of the measuring instruments in the plant are stored and managed, and FIG. 6 is an instrument calibration device terminal for checking the pressure switch 13 in the plant. It is a block diagram which shows the state which measures automatically the contact output of the pressure switch 13, monitoring the pressure value which 1a pressurizes.

  FIG. 6 shows a situation when the pressure switch 13 is inspected as a development according to the present embodiment. Note that, as in FIGS. 3 and 4, multiple simultaneous pressurization inspections are possible. The contact-voltage converter 12 converts the contact output signal of the pressure switch 13 into a voltage and is connected to the digital multimeter 3. The pressure switch 13 is a measuring device that detects main control process values of the plant such as pressure and liquid level.

  As described above, according to the third embodiment of the present invention, it is not necessary to carry individual specifications (range, temperature correction, head correction, specific gravity of the measured object, etc.) with paper in the inspection of the pressure switch 13, and data transcription is performed. It is possible to construct a pressure transmitter inspection system for a plant that eliminates time mistakes and human error, and can save labor.

  As described above, according to the present invention, the instrument calibration device terminal 1a (personal computer) is inspected when the pressure transmitter 8 which is a pressure system on-site type instrument such as pressure, liquid level, and flow rate is inspected. , Automatically import the instrument specifications, monitor the pressurized pressure, collect automatic inspection data, automatically determine the inspection results, and create a report on the remote instrument calibration device server 1b (PC). A plant pressure transmitter inspection system for centrally managing inspection results and inspection history is configured.

  Further, among the devices constituting the plant 10, the instrument calibration device terminal 1a is used to check the pressure switch 13 which is a pressure system on-site type instrument such as pressure, liquid level, etc. Monitoring, automatic inspection data collection, and automatic determination of inspection results. That is, a report table is created by a remote personal computer server, and centralized management of instrument specifications, inspection results, and inspection history is performed.

In addition, among the devices constituting the plant 10, when inspecting the pressure system on- site type instrument such as pressure, liquid level, flow rate, etc., the instrument calibration device terminal 1 a and the multi-channel input type digital multimeter 3 are combined, and a plurality of units are combined at a time. A plant pressure transmitter inspection system for performing instrument inspection is configured.

  Then, among the devices constituting the plant 10, the pressure calibration device terminal 1 a, the digital manometer 2, and the digital multimeter 3 are combined at the time of inspection of the pressure system on-site type meter such as pressure, liquid level, flow rate, etc. A pressure transmitter inspection system for a plant having a function of automatically collecting the measured value when the measurement (calibration) point is reached is configured.

Further, among the devices constituting the plant 10, the pressure calibration device terminal 1 a, the digital manometer 2, and the digital multimeter 3 are combined at the time of inspection of the pressure system on- site type instrument such as pressure, liquid level, and flow rate, and the pressurized pressure is monitored. If the measured pressure does not meet the measurement conditions by telling the operator about the pressure increase / decrease speed by visual and sound to the operation (calibration) point. An inspection system for a pressure transmitter for a plant that prevents an erroneous operation is configured.

  Furthermore, of the equipment that constitutes the plant 10, it has a level and a leveling mechanism (adjustment feet) so that it does not interfere with the measurement of a set of inspection equipment used on-site at the time of inspection of the pressure system on-site type meter. It is loaded on the trolley “Okamochi” 7 and can be easily moved on site.

  Moreover, in this embodiment, all the instruments of the apparatus which comprise the plant 10 use the instrument calibration apparatus terminal 1a, and perform automatic acquisition of the said instrument specification, automatic inspection data collection, and the automatic determination of an inspection result. Thereby, a remote instrument calibration apparatus server 1b creates a result table, and a pressure transmitter inspection system for a plant that performs centralized management of instrument specifications, inspection results, and inspection history is configured.

  In addition, an existing PHS system, wired or wireless communication is used for communication of instrument specifications, inspection history, and inspection / collection data between the instrument calibration apparatus terminal 1a and the remote instrument calibration apparatus server 1b used on site to inspect equipment constituting the plant 10. Using a LAN system, or using a temporary telephone line when the plant 10 is inspected, it is possible to perform communication via a wired or wireless LAN from a DSL modem.

  In addition, the memory card 11 can be used to update the instrument specifications, inspection history and inspection / collection data in the instrument calibration apparatus terminal 1a and the remote instrument calibration apparatus server 1b used in the field to inspect the equipment constituting the plant 10. It becomes.

The system block diagram which shows the work place or office by 1st Embodiment of this invention. The system block diagram which shows the plant by 1st Embodiment of this invention. The system block diagram which shows the workplace or office by 2nd Embodiment of this invention. The system block diagram which shows the plant by 2nd Embodiment of this invention. The system block diagram which shows the workplace or office by 3rd Embodiment of this invention. The system block diagram which shows the plant by 3rd Embodiment of this invention.

Explanation of symbols

1a Instrument calibration device terminal (PC)
1b Instrument calibration device server (PC)
2 Digital Manometer 3 Digital Multimeter 4 Current-Voltage Converter 5 Pressure Source 6 Transmitter 7 Transmitter 7 Car 8 Pressure Transmitter 9 Workplace or Office 10 Plant 11 Memory Card 12 Contact-Voltage Converter 13 Pressure Switch 14 Hose 15 Electrical signal extraction circuit

Claims (1)

An instrument calibration device terminal applied at the time of inspection of the pressure transmitter constituting the plant;
Determination means for automatically taking in the instrument specifications of the pressure transmitter, monitoring pressurized pressure, collecting automatic inspection data, and automatically determining inspection results;
A remote server for instrument calibration that creates a gradebook based on the judgment results;
With management means for centralized management of instrument specifications, inspection results and inspection history,
The instrument calibration device terminal has automatic determination of the instrument specifications of the pressure transmitter, monitoring of pressurized pressure, automatic inspection data collection, automatic determination of inspection results,
The remote server has the management means;
The instrument calibration device terminal takes in a pressure value from a digital manometer connected to a pressure source that supplies pressure to the pressure transmitter, and transmits the pressure rise and fall speeds and measurement points to the operator visually and sound. And a pressure transmitter inspection system for a plant.

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