JPH10221193A - Gas pressure tabulation system, and gas pressure measuring device and tabulation device used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas pressure tabulation system which can tabulate easily the measuring results of gas pressure in a gas conduit in various areas. SOLUTION: A gas pressure measuring device 1 detects gas pressure with inner pressure sensor by connecting a rubber hose 13 to the nipple of a gas cock, samples gas pressure values with a specified interval of time, and stores the sampled gas pressure values and their measuring times as a measuring data in its RAM. A tabulation device 2 collects the measuring data through a communication cable 3, prepares a data for creating a graph on the basis of the data, and indicates a polygonal-line graph showing the change with time elapse of gas pressure together with related data such as measuring date, measuring site, etc. In this case, the peak position of the maximum and minimum gas pressure values in the graph is added with a mark, analysis is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas pressure counting system for counting changes in gas pressure, particularly gas pressure in a low-pressure gas pipe such as city gas, a gas pressure measuring device used in the system, and a counting device therefor. About.

[0002]

_2. Description of the Related Art In order to prevent extinction and the like, city gas companies provide gas supply destinations such as homes with a specified gas pressure (specified by each company, about 150 to 220 mmH ₂ O, and further referred to as “mmH " ₂ O" indicates a unit of measurement of gas pressure that can raise a water column to a height of mm.) In order to confirm whether gas is supplied or not, a gas pipe at a place specified by a prescribed government agency is used. It is obliged to measure the gas pressure inside and notify the relevant government office,
In addition, gas pressures are measured at locations that are voluntarily selected by each business operator to enhance safety even at locations other than those specified by the designated government offices.

Conventionally, a measuring device such as a chart type pressure gauge is used as a gas pressure measuring device for this purpose. The chart type pressure gauge is configured such that a concentrically scaled disk-shaped chart paper is slowly rotated by a rotating mechanism powered by a mainspring, and the recording pen is radiused by a displacement mechanism that is displaced in accordance with gas pressure. , And changes over time of the gas pressure are recorded on the chart paper. This displacement mechanism has, for example, a simple configuration for introducing gas in a gas conduit through a gas hose into a bellows-shaped closed container formed of an elastic member. Is displaced to record the gas pressure.

By the way, from the above-mentioned point of preventing the disappearance at the supply destination, it is desirable to measure the gas pressure at a position as close as possible to the supply destination. For this reason, the measurement is usually performed using water collectors installed at various places in the gas conduit. This water removal device is provided for the purpose of preventing blockage of the gas conduit due to stagnation of water generated by condensation of water vapor in the gas,
A concave portion for storing water is provided at the bottom of the center of the tubular member provided in the middle of the gas conduit, and a standing pipe extending close to the ground surface is provided at the upper portion thereof. A plug of a plug member is fastened with a screw to a socket attached to the uppermost portion of the standing pipe, and a cover is further provided by a protector on the ground surface of the standing hole in which the standing pipe is embedded.

[0005] When water is removed from the gas conduit by an operator, the protector on the ground surface is opened, the plug of the socket is removed, the pipe is inserted into the upright, and the water collected in the internal recess is pumped out. By using such a water drainer, a person who measures the gas pressure can measure the gas pressure of the supply destination without providing any special facility.

[0006] On the other hand, in heavy snowfall areas, the surface of the water collector may be covered with thick snow due to the snow and measurement outdoors may not be possible. The water collector may be submerged, making it difficult to measure the gas pressure. In such a case, with the cooperation of gas consumers, a chart type pressure gauge is connected to the gas cock of each household to measure the gas pressure.

[0007] After measuring the gas pressure in this way, the measurer takes the chart paper back to the business office and manually counts the changes in gas pressure in various places, especially the minimum gas pressure and the maximum gas pressure. Safety management of gas supply is performed based on pressure.

[0008]

However, the above-described gas counting system has the following problems. First, there is a measurement problem. That is, the chart type pressure gauge has a large space due to its mechanical configuration,
It is difficult to store in the vertical hole of the above-mentioned water drainer, and therefore, the measurer must perform measurement with the chart type pressure gauge placed on the surface of the ground, and the water drainer is installed under the road. In many cases, the measurement work is very dangerous, and also causes traffic obstruction. On the other hand, when measuring from a household gas cock, the chart-type pressure gauge is large and takes up space, and because it is driven by a mainspring, the abnormal noise (sound of a clock ticking) during measurement is unexpectedly loud. If the time extends into the middle of the night, there is a risk that the sleep of the home may be affected, and there is a problem that it is difficult to obtain cooperation.

Second, there is a problem in counting the gas pressure in each place. As described above, the measurer takes the chart paper recorded in each place back to the office or the like, and manually observes the trend of gas pressure over time and the minimum and maximum gas pressures individually while looking at the recorded data. This is a very time-consuming task, and is not always desirable from the viewpoint of quick safety management and work efficiency.

The present invention has been made in view of the above problems, and is a gas pressure totalizing system which solves a problem in measuring gas pressure and a problem in totalizing, a gas pressure measuring device and a totalizing device used in the system. The purpose is to provide.

[0011]

To achieve the above object, a gas pressure totalizing system according to the present invention comprises a gas pressure measuring device for measuring gas pressure and a totalizing device for totalizing the measured data. A pressure totalizing system, wherein the gas pressure measuring device is a pressure sensor that detects a gas pressure; a storage unit that stores, as measurement data, a result of the detection by the pressure sensor and information about a measurement time thereof; Control means for controlling the writing of the measurement data to the storage means, and first communication means for performing data communication with the counting device, wherein the counting device performs data communication with the gas pressure measuring device. Second communication means for calculating the pressure of the gas based on the measurement data received from the gas pressure measuring device; Based on the calculation result of the means, characterized in that it comprises a display means for displaying the graph.

Further, in the gas pressure totalizing system according to the present invention, the totaling device includes a measuring condition setting means for setting a measuring condition of the gas pressure measuring device, and the data of the set measuring condition is transmitted to the second device. And transmitting the measurement condition data to the gas pressure measurement device via the first communication device and controlling the writing of the measurement data based on the measurement condition. It is characterized by the following.

Further, the gas pressure measuring device according to the present invention is
A gas pressure measuring device capable of transmitting measured gas pressure data to a totaling device, comprising: a pressure sensor for detecting a gas pressure; and storage means for storing, as measurement data, a result of detection by the pressure sensor and information on a measurement time thereof. Control means for controlling writing of measurement data to the storage means,
Input means for instructing the start and end of measurement of gas pressure, wherein the control means changes the storage area of the measurement data in the storage means separately each time receiving an instruction to start measurement from the input means. The writing control is performed so as to create a recording file.

Further, a gas pressure measuring device according to the present invention is a gas pressure measuring device capable of transmitting measured gas pressure data to a compiling device, wherein the pressure sensor detects a gas pressure, and the pressure sensor detects the gas pressure. Storage means for storing information about the detection result and the measurement time as measurement data,
Control means for controlling writing of measurement data to the storage means, and the measurement data of the gas pressure measurement device is transmitted to the aggregation device via a communication cable connected by a connector, and the control means Detecting means for detecting the connection of the communication cable, whereby when the connection of the communication cable is detected, the measurement data stored in the storage means is set to a data transmission mode for reading and transmitting the measurement data to the counting device. It is characterized by.

[0015] Further, a totalizing device according to the present invention is a device for totalizing measurement data of gas pressure measured by a gas pressure measuring device, wherein a gas is measured based on the measurement data received from the gas pressure measuring device. Calculating means for generating data of a graph indicating a change over time in pressure, and display means for displaying the graph based on the calculation result of the calculating means, wherein the calculating means further includes a gas pressure based on the measurement data. The maximum value or the minimum value is extracted, and the display means displays the position of the maximum value or the minimum value on the graph based on these values.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas pressure totalizing system according to the present invention will be described below with reference to the drawings. (1) Configuration of Entire Gas Pressure Tallying System FIG. 1 is a diagram showing a configuration of a gas pressure tallying system when a household gas pressure measuring device is used.

As shown in FIG. 1, this gas pressure totalizing system is arranged in a home to be measured, detects the terminal gas pressure in a gas cock of the home by a built-in pressure sensor, and converts the detection signal into a digital signal. And a digital gas pressure measuring device 1 which stores the data in a memory and reads the gas pressure measurement data stored in the gas pressure measuring device 1 via a communication cable 3 and processes the data by an internal spreadsheet program. And a totaling device 2 for creating and displaying a graph showing the change over time of the gas pressure.

FIG. 2 is a front view of the gas pressure measuring device 1. As shown in FIG.
1 and an input unit 12 are provided. LCD panel 11 is 8
Characters can be displayed, and a power key 121, a measurement key 122, an end key 123, and a setting key 124 are arranged on the input unit 12 from the left. The indication on the liquid crystal display panel 11 in FIG. 2 indicates that the gas pressure measured at 18:25 is 225 mmH ₂ O.

A nipple 14 for attaching a rubber hose 13 is fixed to the left side of the main body of the gas pressure measuring device 1. The nipple 14 is connected to a pressure sensor 16 (FIG. 3) via a tube inside the device or directly. ) Is air-tightly connected to the sensor surface, and the other end of the rubber hose 13 is attached to the nipple of the gas cock to open the gas plug, so that the gas pressure is detected by the internal pressure sensor 16. .

On the right side of the apparatus main body, a measuring apparatus side connector 15 for connecting the cable side connector 31 of the communication cable 3 (FIG. 1) when performing data communication with the counting apparatus 2 is installed. The counting device 2 (FIG. 1) is composed of a general-purpose personal computer, and includes a CPU main body 21 having a floppy disk drive device and the like,
A display display 22 made of T, a keyboard 23 for input, a mouse 24, and a printer 25 for printing out a created graph and the like are provided. This CP
A program for totalizing gas pressure is installed in the U body 21. Based on this program, gas pressure data from the gas pressure measuring device 1 is read out, graph data is created and displayed on a display, and an operator's instruction is given. The printer 25 prints out when necessary. Details will be described later. (2) Configuration of Control Unit 100 Inside Gas Pressure Measuring Device 1 Next, the configuration of the control unit 100 inside the gas pressure measuring device 1 will be described with reference to the block diagram of FIG. The measuring device is portable and uses a battery as a power source, but is not shown in FIG.

As shown in FIG. 1, the control unit 100 is based on an A / D converter 101 for converting a gas pressure detected by a pressure sensor 16 made of a semiconductor or the like into a digital signal, and a program stored in an internal memory. A CPU 102 for controlling a gas pressure measurement operation, a clock IC 103 for measuring a measurement time and a preset sampling interval,
RAM 104 for temporarily storing measurement results, communication interface 105 for performing data communication with totaling device 2 and communication cable 3, and measuring device side connector 1
5 is a connector connection detecting section 10 for detecting whether or not the cable side connector 31 of the communication cable 3 is connected to
6

The detected value of the gas pressure by the pressure sensor 16 is
The signal is converted into a digital signal by the A / D converter 101,
Input to the PU 102. A sampling interval (hereinafter, referred to as a “sampling interval”) is set in advance in the internal memory of the CPU 102 by an input operation from the input unit 12, and the first sampling is performed in response to a measurement start instruction from a measurer. The detected value is converted into a gas pressure value of a designated unit, and the value (sampling value) and the measurement time (hereinafter, the information of the sampling value and the measurement time are referred to as “measurement data”) are stored in the RAM 104. .

Thereafter, sampling is performed at the set sampling intervals based on the timing of the clock IC 103,
The measurement data is stored in the RAM 104 until the measurement end instruction is given by operating the input unit 12. The measurement time may include year, month, and day data in addition to normal time data represented by hours and minutes, or as measurement data at the time of sampling, time data of only hours and minutes may be used. Only when the measurement is started and when the measurement is completed, the date data may be stored as accompanying data.

When the measurer installs the gas pressure measuring device 1 at another measurement place and operates the input unit 12 to start measurement, sampling is started as described above, and the CPU 102
Calculates the sampling value and the measurement data of the measurement time as R
The storage area at this time is different from the storage area at the previous measurement location. That is,
The storage area of the measurement data in the RAM 104 is made different for each operation of starting the measurement from the input unit 12, so that a separate recording file is automatically created for each measurement location and programmed so as to number the file. This eliminates the need for a troublesome recording file setting every time the measurer changes the gas pressure measurement location.

When the measurer finishes the measurement at the target measurement place, takes the gas pressure measuring device 1 back to the business office, and connects the cable connector 31 of the communication cable 3 to the measuring device connector 15, the connector The connection detection unit 106 detects this and sends a signal to that effect to the CPU 102,
In response to this, the CPU 102 switches its control mode to the data transmission mode, receives a read request from the tallying device 2, and transfers the measurement data and other accompanying data stored in the RAM 104 via the communication interface 105 to the tallying device 2. Send to The accompanying data includes the date and time of the measurement start / end and the device number of the gas pressure measuring device 1 and the like.

As the connector connection detecting section 106, for example, two idle pins are provided on the cable side connector 31 to short-circuit them, and the connection of the socket corresponding to the short-circuited pin on the measuring apparatus side connector 15 is performed. Or a simple configuration that directly detects the insertion of the cable-side connector 31 into the measuring-device-side connector 15 using a limit switch, or is transmitted from the aggregation device 2 via the communication cable 3. It may detect a specific signal. (3) Processing in Tabulation Device 2 The CPU main body 21 of the tabulation device 2 receives the above-described measurement data and the like transmitted from the gas pressure measurement device 1 via an internal communication interface and stores the data in a hard disk.

When an operator gives an instruction to create a graph,
Based on the measurement data, the data of the graph showing the time-dependent change of the gas pressure and the respective values of the minimum gas pressure, the maximum gas pressure and the average gas are obtained and displayed on the display 22. FIG. 4 is a diagram showing an example of the graph display. The horizontal axis of the graph is the measurement time, and the vertical axis is the gas pressure value in mm.
The values are shown in units of H ₂ O, so that changes over time in gas pressure can be instantaneously understood. In this graph, the peak value of the gas pressure, that is, the peak position of the maximum gas pressure and the peak position of the minimum gas pressure are marked with □ and x, respectively, so that the gas pressure can be easily analyzed. It is devised to become.

In addition, above the graph, a measurement location,
Recorder (gas pressure measurement device) number, measurement start date, measurement end date, interval (sampling interval), number of recorded data, minimum gas pressure value and its measurement time, average gas pressure, and maximum gas pressure value and its measurement Data such as time is displayed. The measurement location is separately input by the operator based on the device number of the gas pressure measurement device that has collected the data and the number of the recording file, by referring to the measurement schedule of the operator.

The measurement conditions such as the sampling interval in the gas pressure measuring device 1 can be set by an operation from the input unit 12, but can also be set in the gas pressure measuring device 1 by transmitting data from the totaling device 2. It is. That is, the communication cable 3 is connected to the gas pressure measuring device 1 and the setting key 124 of the input unit 12 is pressed to set the gas pressure measuring device 1 to the measurement condition setting mode, while the keyboard 23 and the like of the counting device 2 are operated. By operating and inputting measurement conditions such as the device number, sampling interval, and pressure unit (mmH ₂ O or kPa), and instructing data transmission,
The setting data and the time data (year, month, day, time) stored in the CPU main body 21 are transmitted to the control unit 100 of the gas pressure measuring device 1 and set in the internal memory of the CPU 102. May be configured. In this way, it is very convenient to eliminate the trouble of individually setting measurement conditions from a small number of keys of the gas pressure measuring device 1. (4) Next, the gas pressure measurement operation in the gas pressure measurement device and the aggregation operation in the aggregation device 2 will be described in detail with reference to flowcharts. (4-1) Gas Pressure Measuring Operation FIG. 5 is a flowchart showing the gas pressure measuring operation.

First, the operator operates the power key 1 of the input unit 12.
Press 21 (FIG. 2) to turn on the power and perform zero adjustment (steps S1, S2). This zero adjustment is performed by pressing the power key 121 while pressing the setting key 124 before connecting the rubber hose 13 to the nipple of the gas cock (that is, when the pressure sensor 16 is open to the atmosphere). The gas pressure is automatically set to 0 mmH ₂ O at the detection value of the pressure sensor 16 at the atmospheric pressure.

At the same time as this setting, the mode is switched to the span adjustment mode, and the span is adjusted (step S3). In this span adjustment, the rubber hose 13 is connected to the nipple of the gas cock to open the gas stopper, and at this time, the gas pressure displayed on the liquid crystal display panel 11 is equal to the accurate gas pressure measured by the pressure calibrator in advance. It is adjusted to be a value. That is, when the span adjustment mode is set, the measurement key 122
When the display key is pressed, the display value increases, and when the end key 123 is pressed, the display value decreases. When the display value becomes equal to the value indicated by the pressure calibrator, the setting key 124 is pressed. Accordingly, the ratio of the gas pressure change to the change in the detection value of the pressure sensor 16 is set correctly.

Thereafter, other contents are set (step S4). This means that every time the setting key 124 is pressed, the display screen of the liquid crystal display panel 11 changes the sampling interval,
Switch to a screen such as the time, and in each display screen, press the measurement key 122 and the end key 123 as described above to change the corresponding numerical value to a desired value, and finally press the setting key 124 to CPU 10
2 is set in the internal memory. Note that, as described above, this setting operation can be executed by data transmission from the aggregation device 2.

The "zero adjustment", "span adjustment", and "other settings" in steps S2 to S4 do not necessarily need to be performed at the measurement site, but may be performed periodically or before going to the measurement site. Is also good. Now, after setting the above-mentioned contents, the rubber hose 13 is inserted into the nipple of the household gas cock. Connection), measurement key 122
Is pressed to start measurement (step S
5).

First, the address of the storage area in the RAM 104 for storing the measurement result at the measurement location is specified (step S6). At this time, an address different from the storage area of the measurement result at the previous measurement location is designated, and a recording file with a different number is formed. Then, the detection value of the pressure sensor 16 is sampled, and the detection value is converted into a gas pressure value of a designated unit,
The value and the measurement time are stored in the corresponding address of the RAM 104, and thereafter, sampling is performed at predetermined sampling intervals, and the measurement result and the measurement time are stored in the RAM 104 as measurement data (step S).
7, S8, S9).

These sampling operations are continued until the measurer presses the end key 123 to instruct the end of the measurement (step S9). When the measurer further presses the power key 121, the power is turned off (step S12). ), A series of measurement operations ends. Note that power is supplied to the RAM 104 irrespective of whether the power is on or off, and care is taken so that stored measurement data is not lost. (4-2) Aggregation Operation in Aggregation Device 2 FIG. 6 is a flowchart showing the operation of the aggregation device 2 after the activation of the aggregation program.

First, the measurement data stored in the RAM 104 of the gas pressure measuring device 1 is downloaded to the counting device 2 (step S21). The cable side connector 31 of the communication cable 3 is connected to the measuring device side connector 15 of the gas pressure measuring device 1 and the power key 121 of the input section 12 is connected.
Is pressed, the connection of the cable side connector 31 is detected by the connector connection detection unit 106, and the control unit 10
0 is automatically set to the measurement data transmission mode.

Therefore, when a key is operated by the keyboard 23 of the counting device 2 or a predetermined icon on the menu screen is clicked by the mouse 24 and a data read request is sent to the gas pressure measuring device 1, the measurement stored in the RAM 104 is performed. The data and the accompanying data are read out and transferred to the CPU main body 21 of the counting device 2, and the measurement data and the like are downloaded. Note that the measurement data and the like in the RAM 104 are automatically deleted when the transfer to the counting device 2 is completed, and are programmed in the internal memory of the CPU 102 so as to prepare for the subsequent measurement.

When the CPU main unit 21 downloads the measured data from the gas pressure measuring device 1, it stores the data in the internal hard disk for each recording file (step S2).
2). When the operator selects and specifies what he or she wants to graph from the stored recording files (step S2).
3) Read out the measurement data of the file (step S24), and based on these measurement data,
Create chart data by performing spreadsheets,
The minimum and average gas pressure values are obtained (step S26), and a graph as shown in FIG. 4 is displayed on the display 22 (step S27).

Thereafter, if there is a printout instruction from the operator, the display data on the display 22 is transferred to the printer 25 and printed out (step S2).
8, S29), and if there is an instruction to save the graph, the display data is stored in the internal hard disk (steps S30, S31), and the counting operation ends. As described above, according to the gas pressure totalizing system in the present embodiment, since the gas pressure measuring device is a digital measuring device, the device itself can be formed compactly and can be installed at home without taking up space. There is no occurrence. Further, since the measured data is electrically stored in the RAM 104, the measured data can be downloaded to a tallying device, and a change in gas pressure can be automatically graphed by a tallying program, which makes the analysis extremely easy. This enables quick and accurate gas pressure management. (5) Modifications The technical scope of the present invention is not limited to the above-described embodiment, and for example, the following modifications can be considered.

(5-1) In the gas pressure measuring device 1, the detection value of the pressure sensor 16 is converted into a gas pressure value, and this is stored in the RAM 104 as a detection result. The values may be stored as they are, and may be converted into gas pressure values in a designated unit when the data is converted into graph data by the aggregation device 2. (5-2) In addition, the gas pressure measuring device 1 described above measures the gas pressure from a household gas cock. However, when the gas pressure is measured from an outdoor water collector, a gas having a shape as shown in FIG. The pressure measuring device 200 may be used.

The gas pressure measuring device 200 includes a measuring device main body 210 housed in a disc-shaped container and a pressure sensor section 22.
0 and both are connected by a connection cable 230. A liquid crystal display panel 211 and an input unit 212 are provided on the upper surface of the measuring apparatus main body 210, and the diameter thereof is set to about 8 cm so that the liquid crystal display panel 211 and the input unit 212 can be accommodated in a vertical hole for a water collector. A battery case 213 is vertically attached to the periphery of the bottom surface of the measuring device main body 210, and the lid member 214 is opened to accommodate two dry cells of a predetermined size (AAA) in series. Power to the control unit.

On the other hand, the pressure sensor section 220 has a base 221.
And a screw portion 222 formed below the base portion 221. Inside the screw portion 222, a pressure sensor 224 is provided.
Is buried with its sensor surface exposed to the atmosphere,
The detection signal is sent to the measurement device main body 210 via the connection cable 230. The screw portion 222 of the pressure sensor portion 220 is formed with a screw groove having the same diameter and the same pitch as the plug screwed into the socket of the vertical hole of the water drainer, so that the screw hole is screwed into the socket in an airtight manner. It has become. An annular seal member 223 made of an elastic material such as rubber is fitted into the base of the screw portion 222, and completely prevents gas leakage when the pressure sensor portion 220 is attached to the water drainer. I do.

At the time of gas pressure measurement, the pressure sensor 22
The screw portion 222 of 0 is fixed in place of the plug of the water drainer, and the control unit in the measuring device main body 210 measures the lowest gas based on the detection value detected by the pressure sensor 224. The configuration of the control unit is the same as that of the gas pressure measuring device 1 described above.
It is almost the same as
Measuring device body side connector connected to 1 (not shown)
Is also used as a connector for data communication with the counting device 2, and is provided with a selector for switching the internal connection according to the type of the connector to be connected. That is, when the measurement data is downloaded to the aggregation device 2, the cable-side connector 231 is disconnected and the cable-side connector 31 (FIG. 1) of the communication cable 3 is connected.
At this time, the control mode of the CPU 102 is automatically switched to the data transmission mode and the selector is switched to the data transmission side by the detection operation of the connector connection detection unit 106 (FIG. 3) described above. In this case, for example, the connector connection detection unit 106 is configured to detect a short-circuit pin of the connector on the cable side.
A short-circuit pin is provided on the cable-side connector 31 of the communication cable 3 for communication with the counting device 2, and a short-circuit pin is not provided on the cable-side connector 231 for sensor input (or the short-circuit pin is provided at a different position. ), It is easy to distinguish between the two connectors.

According to such a gas pressure measuring device 200, since the measuring device main body 210 is formed in a compact disk shape in accordance with the vertical hole of the water drainer, it can be easily housed in the vertical hole. Also, there is no need for the measurer to be present at all times, and the danger of measurement on the road and traffic obstruction can be extremely reduced. Further, the mode can be automatically switched according to the type of the connector to be connected, so that the operation is very easy.

(5-3) In the gas pressure measuring device 1, the measurement time is sequentially stored in the RAM 104 together with the detection result by the pressure sensor 16, but the measurement time is always stored for each sampling. There is no need to store, for example, three data of the measurement start date and time, the measurement end date and time, and the sampling interval for each record file created for each measurement value as information on the measurement time, and the totaling device 2 graphs the data. At the time of conversion, a time may be given to each gas pressure measurement value from the measurement start time and the sampling interval. In this case, there is an effect that the storage area of the RAM 104 can be saved.

(5-4) In the above-described embodiment, the gas pressure measuring device 1 is brought back to the office or the like, and the measured data is read into the totaling device 2 via the communication cable 3. The device 1 is fixed to each measurement place,
It is also possible to configure so that the measurement data is transmitted to the counting device 2 online via a telephone line or the like.

[0047]

As described above, according to the gas pressure totalizing system according to the present invention, the gas pressure measuring device electrically stores the detection result obtained by the pressure sensor in the storage means, so that the gas pressure measuring device can be made compact. It is possible to measure the gas pressure by storing it in the vertical hole of the water drainer, which reduces traffic obstruction and danger during measurement. In addition, even when installed in a home, there is no measurement sound, so that it is easy to obtain cooperation from each home. Further, the stored measurement data is sent to the tabulation device by data communication, and the graph data is created and displayed on the display means, so that the analysis becomes extremely easy.

Further, according to the gas pressure totalizing system of the present invention, the measuring conditions of the gas pressure measuring device can be set from the measuring condition setting means of the totaling device, and can be set in the gas pressure measuring device by data communication. Therefore, it is not necessary to set detailed measurement conditions with the gas pressure measuring device. Further, the gas pressure measuring device according to the present invention is a gas pressure measuring device capable of transmitting gas pressure data to a totaling device, and each time a measurement start instruction is received from an input unit, the measurement data in the storage unit is read. Since the storage area is changed so as to create separate recording files, the measurement data obtained at a plurality of measurement locations can be distinguished and stored without any complicated operation.

Further, the gas pressure measuring device according to the present invention is a gas pressure measuring device capable of transmitting measured gas pressure data to a compiling device, and the measured data is transmitted via a communication cable connected by a connector. When the connection of the communication cable is detected by the detecting means for detecting the connection of the communication cable, the measurement data in the storage means is automatically read out and transmitted to the totaling apparatus. Since the mode is set to the data transmission mode, a complicated operation for changing the mode is not required.

Further, the counting device according to the present invention extracts the maximum value or the minimum value of the gas pressure based on the measurement data and displays the position of the maximum value or the minimum value on the graph as a mark. The operator can easily determine the pressure peak time, and quick analysis becomes possible.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a gas pressure totalizing system according to the present invention.

FIG. 2 is a front view of the gas pressure measuring device.

FIG. 3 is a block diagram showing a configuration of a control unit installed inside the gas pressure measuring device.

FIG. 4 is a diagram showing an example of a graph showing a change in gas pressure displayed by a totaling device.

FIG. 5 is a flowchart showing an operation of gas pressure measurement by the gas pressure measurement device.

FIG. 6 is a flowchart illustrating a tallying operation in the tallying device.

FIG. 7 is a diagram showing another example of the gas pressure measuring device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 gas pressure measuring device 2 totaling device 3 communication cable 11 liquid crystal display panel 12 input unit 13 rubber hose 14 nipple 15 measuring device side connector 16 pressure sensor 100 control unit 101 A / D converter 102 CPU 103 clock IC 104 RAM 105 communication interface 106 Connector connection detector

Claims (5)

[Claims] 1. A gas pressure totaling system comprising: a gas pressure measuring device for measuring gas pressure; and a totaling device for totalizing the measured data, wherein the gas pressure measuring device has a pressure for detecting gas pressure. A sensor, storage means for storing the detection result of the pressure sensor and information on the measurement time as measurement data, control means for controlling writing of the measurement data to the storage means based on predetermined measurement conditions, First communication means for performing data communication;
And a second communication unit for performing data communication with the gas pressure measurement device, and a graph showing a change over time in gas pressure based on measurement data received from the gas pressure measurement device. A gas pressure totalizing system, comprising: a calculation unit for generating data; and a display unit for displaying the graph based on a calculation result of the calculation unit. 2. The apparatus according to claim 1, further comprising: a measuring condition setting unit configured to set a measuring condition of the gas pressure measuring device. The data of the set measuring condition is measured via a second communication unit. The apparatus according to claim 1, wherein the gas pressure measuring device receives the measurement condition data via a first communication unit, and controls writing of the measurement data based on the measurement condition. Gas pressure counting system. 3. A gas pressure measuring device capable of transmitting measured gas pressure data to a totaling device, comprising: a pressure sensor for detecting a gas pressure; and information on a result of detection by the pressure sensor and a measurement time thereof. A control unit that controls writing of measurement data to the storage unit; and an input unit that instructs start and end of measurement of gas pressure. Each time a measurement start instruction is received from the storage device, the writing control is performed such that the storage area of the measurement data in the storage means is changed to create a separate recording file. 4. A gas pressure measuring device capable of transmitting measured gas pressure data to a totaling device, comprising: a pressure sensor for detecting a gas pressure; and information about a result of detection by the pressure sensor and a measurement time. And a control unit for controlling writing of measurement data to the storage unit. The measurement data of the gas pressure measurement device is stored in the storage device via a communication cable connected by a connector. The control means includes a detection means for detecting the connection of the communication cable, and when detecting the connection of the communication cable, reads out the measurement data stored in the storage means and transmits the measurement data to the totaling device. A gas pressure measuring device set in a data transmission mode. 5. An apparatus for summarizing measurement data of gas pressures measured by a gas pressure measurement device, comprising: a graph showing a change over time in gas pressure based on measurement data received from the gas pressure measurement device. An arithmetic unit for generating data; and a display unit for displaying the graph based on the arithmetic result of the arithmetic unit. The arithmetic unit further extracts a maximum value or a minimum value of the gas pressure based on the measurement data. And a display device for displaying the position of the highest value or the lowest value on a graph based on these values.