JP2017173135A - Straight tube type gas meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a straight tube type gas meter capable of displaying information appropriately in accordance with its attachment state.SOLUTION: In a straight tube type gas meter 1, a gas flow inlet for introducing a gas and a gas flow outlet for discharging the gas, which are formed on a meter body, and a flow velocity sensor 5 for measuring a flow rate of the gas flowing in a flow channel from the gas flow inlet to the gas flow outlet are arranged linearly, and a display panel 2 for displaying an integrated value of the gas flow rate based on a measurement value measured by the flow velocity sensor 5 is provided. The straight tube type gas meter comprises: an acceleration sensor 9 which outputs at least a signal according to a gravity direction; and a display control unit 101 which controls an orientation of display information displayed on the display panel 2, in accordance with the gravity direction based on the signal from the acceleration sensor 9.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a straight pipe type gas meter.

  Conventionally, a gas meter has a structure in which a gas inlet and outlet are provided in the upper part of the meter, and a U-shaped flow path is formed inside, and a display unit that displays an integrated value of the gas flow rate in the center of the front (For example, refer to Patent Document 1).

JP 2006-292377 A

  Here, the present applicant has proposed a straight pipe gas meter in which the gas meter described in Patent Document 1 is improved and the flow path inside the meter is formed in a substantially linear shape. Such a straight pipe type gas meter can be installed in various orientations such as portrait orientation and landscape orientation, but the front display part may not have display contents corresponding to each such orientation. There is sex.

  The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a straight tube type gas meter capable of performing an appropriate display according to the mounting state. There is.

  The straight pipe type gas meter according to the present invention includes a gas inlet formed in the meter body for introducing gas, a gas outlet for discharging gas, and a straight gas passage extending from the gas inlet to the gas outlet. A straight pipe type gas meter comprising: a flow rate sensor for measuring a flow rate of the gas flowing through the gas flow path; and a display unit for displaying an integrated value of the gas flow rate based on a measurement value measured by the flow rate sensor. An acceleration sensor that outputs at least a signal corresponding to the direction of gravity, and a display control unit that controls the direction of display information displayed on the display unit according to the direction of gravity based on the signal from the acceleration sensor. It is characterized by providing.

  This straight tube type gas meter controls the direction of display information displayed on the display unit according to the direction of gravity. Therefore, the orientation of the display information can be controlled even if it is installed vertically or horizontally. It is possible to display appropriately according to the attachment state.

  Further, in the straight pipe type gas meter of the present invention, a shutoff valve for closing the gas flow path, and a valve control means for opening the shutoff valve when a predetermined operation is performed when the shutoff valve is in a valve closed state. And the valve control means determines that the predetermined operation has been performed when the acceleration sensor detects an acceleration corresponding to a knock on the meter body when the shut-off valve is in a valve-closed state. Is preferred.

  According to this straight pipe type gas meter, the valve control means for opening the shut-off valve when a predetermined operation is performed when the shut-off valve is in the valve-closed state is detected, and acceleration corresponding to knocking to the meter body is detected. If it is, it is determined that a predetermined operation has been performed. For this reason, it is not necessary to provide the straight pipe type gas meter with a shut-off valve return button (push-type return button) similar to the conventional one. In particular, there are some users who feel anxious or scared about the act of pressing the push-in return button, but this may lead to a reduction in anxiety and fear. it can.

  The straight tube type gas meter according to the present invention further includes storage means for storing a plurality of pieces of information that can be displayed on the display unit, and the display control means displays information from the plurality of pieces of information stored by the storage means. Is selected and displayed, and when acceleration corresponding to knocking to the meter body is detected by the acceleration sensor, it is preferable to select information to be displayed next according to the knocking direction.

  According to this straight pipe type gas meter, information to be displayed is selected and displayed from a plurality of stored information, and when acceleration corresponding to knocking to the meter body is detected by the acceleration sensor, according to the knocking direction. Next, select the information to be displayed. For this reason, it is possible to select a variety of information that is sensuous to the user according to the knocking direction (for example, four directions) compared to the push-in type return button.

  Further, in the straight tube type gas meter of the present invention, the acceleration sensor detects acceleration in at least three axis directions orthogonal to each other, and the valve control means detects the acceleration with an indefinite period by the acceleration sensor. It is preferable to close the shut-off valve when detected in the axial direction.

  According to this straight pipe type gas meter, the acceleration sensor detects acceleration in at least three axis directions, and when the acceleration sensor detects acceleration with an indefinite period on three axes, the shutoff valve is closed. Further, by using an acceleration sensor installed to realize display optimization and an operation function, it is possible to perform earthquake detection similar to that of a conventional seismoscope.

  ADVANTAGE OF THE INVENTION According to this invention, the straight pipe | tube type gas meter which can perform an appropriate display according to an attachment state can be provided.

It is an external appearance perspective view of the straight pipe type gas meter concerning this embodiment. FIG. 2 is a control block diagram of the straight pipe type gas meter shown in FIG. 1. It is a 1st flowchart which shows the processing content of the straight pipe | tube type gas meter which concerns on this embodiment. It is a front view of the straight tube | pipe type gas meter which shows the division of a gravitational direction. It is a 2nd flowchart which shows the processing content of the straight pipe | tube type gas meter which concerns on this embodiment. It is a conceptual diagram which shows the mode of the information selection in step S17 shown in FIG.

  Hereinafter, the present invention will be described according to preferred embodiments. Note that the present invention is not limited to the embodiments described below, and can be appropriately changed without departing from the spirit of the present invention. Further, in the embodiment described below, there is a part where illustration or description of a part of the configuration is omitted, but details of the omitted technology are within a range in which there is no contradiction with the contents described below. Needless to say, known or well-known techniques are applied as appropriate.

  FIG. 1 is an external perspective view of a straight tube type gas meter according to the present embodiment, and FIG. 2 is a control block diagram of the straight tube type gas meter shown in FIG.

  As shown in FIG. 1, the straight tube type gas meter 1 includes a meter body 10 that is a casing formed of a metal material such as aluminum or an aluminum alloy. The meter body 10 has a substantially quadrangular prism-shaped outer shape, and has a straight tube shape that is long in the height direction of the quadrangular column. In the example shown in FIG. 1, the meter body 10 is installed such that its longitudinal direction coincides with the vertical direction (gravity direction).

  The meter body 10 includes a gas inlet 11 that introduces gas into one end 10a in the longitudinal direction, and a gas outlet 12 that discharges gas into the other end 10b in the longitudinal direction. The gas inlet 11 is connected to a gas supply source via an upstream pipe 200, and the gas outlet 12 is connected to a gas supply destination via a downstream pipe 201. For the connection between the gas inlet 11 and the upstream pipe 200 and the connection between the gas outlet 12 and the downstream pipe 201, a joint structure 15 that can be disconnected by a one-touch operation (that is, only pushing operation) is used. Yes.

  Inside the meter body 10, one gas flow path 13 extending from the gas inlet 11 to the gas outlet 12 is formed. In the present embodiment, the gas flow path 13 has a straight shape extending from the gas inlet 11 to the gas outlet 12 in a substantially linear shape.

  Further, as shown in FIG. 2, a straight pipe type gas meter 1 according to the present embodiment includes a display panel (display unit) 2, a flow velocity sensor 5, a pressure sensor 6, a shutoff valve 7, a communication unit 8, and a microcomputer (microcomputer). 100.

  The display panel 2 is configured by an LCD or the like, and is provided on the front portion 10 c of the meter body 10. The display panel 2 is controlled by the microcomputer 100 and displays information processed by the microcomputer 100. Typical information displayed on the display panel 2 is an integrated value (integrated flow rate) of the gas flow rate based on the measurement value measured by the flow velocity sensor 5.

  The flow rate sensor 5 is provided in the gas flow path 13 inside the gas meter 1. The flow rate sensor 5 measures a gas flow (specifically, a flow rate) passing through the gas flow path 13 and outputs a signal corresponding to the flow rate. A signal output from the flow velocity sensor 5 is input to the microcomputer 100. As the flow rate sensor 5, for example, an ultrasonic sensor or a flow sensor can be used.

  Here, in the straight pipe type gas meter 1 according to the present embodiment, since the gas flow path 13 is substantially straight, the gas inlet 11, the gas outlet 12, and the flow velocity sensor 5 are arranged in a straight line. Structure.

  The pressure sensor 6 is provided in the gas flow path 13 inside the gas meter 1. The pressure sensor 6 measures the gas pressure in the gas flow path 13 and outputs a signal corresponding to the pressure. A signal output from the pressure sensor 6 is input to the microcomputer 100. As the pressure sensor 6, a piezoresistive type or a capacitance type sensor can be used.

  The shut-off valve 7 is provided in the gas flow path 13 inside the gas meter 1, and shuts off the gas flow path 13. As the shut-off valve 7, for example, a solenoid valve, a motor valve or a ball valve can be used. The ball valve is provided with a ball-shaped valve body having a through-flow passage in a valve body so as to be rotatable, and the gas is released or cut off by rotating the valve body about a valve shaft. By using a ball valve as the shut-off valve 7, the shut-off valve 7 itself can be reduced in size, and as a result, the meter body 10 can be reduced in size and pressure loss can be reduced.

  The communication unit 8 is for the microcomputer 100 of the straight tube type gas meter 1 to communicate with external devices (setting device, meter-reading device and center device). The communication unit 8 includes terminals for inputting and outputting various signals (for example, an N line terminal for a telephone line, a terminal for connecting to a gas leak alarm, a terminal for connecting to a carbon monoxide alarm, etc.). It can be composed of a terminal block or a wireless communication device using radio waves or light.

  The microcomputer 100 is a control unit that controls the entire straight pipe type gas meter 1. The microcomputer 100 is mounted on, for example, a control board, and the control board is accommodated in the meter body 10.

  Here, the straight pipe type gas meter 1 according to the present embodiment can be installed not only vertically but also horizontally as shown in FIG. However, the display panel 2 of the front portion 10c may not have display contents corresponding to each of such orientations. For example, the display with the gas inlet 11 on the upper side is always performed, and when it is installed sideways, there is a possibility that the numbers and the like may be displayed in a state of falling sideways.

  Therefore, the straight pipe type gas meter 1 according to the present embodiment further includes an acceleration sensor 9, and the microcomputer 100 executes a program in a ROM (not shown), thereby causing the display control unit (display control means) 101 to operate. Make it work.

  The acceleration sensor 9 is a sensor that outputs a signal corresponding to at least the direction of gravity. More specifically, the acceleration sensor 9 detects acceleration in three axial directions orthogonal to each other, and outputs a signal corresponding to the acceleration in the other direction in addition to the gravity direction in the real space. A signal output from the acceleration sensor 9 is input to the microcomputer 100.

  The display control unit 101 controls the display content of the display panel 2, and in particular controls the direction of display information displayed on the display panel 2 in accordance with the direction of gravity based on the signal from the acceleration sensor 9. is there. That is, the display control unit 101 displays the display information so that the upper side of the letters and numbers displayed on the display panel 2 is directed vertically upward regardless of whether the straight tube type gas meter 1 is installed vertically or horizontally. Control the orientation. Thereby, it can be set as a suitable display state irrespective of an attachment attitude | position.

  Furthermore, the straight pipe type gas meter 1 according to the present embodiment does not include a push-in type return button for returning the shutoff valve 7 when the shutoff valve 7 is closed, and shuts off using a signal from the acceleration sensor 9. The valve 7 is returned.

  More specifically, in the microcomputer 100, the valve control section (valve control means) 102 functions by executing a program in a ROM (not shown). The valve control unit 102 opens the shut-off valve 7 when a predetermined operation is performed when the shut-off valve 7 is in the valve closed state. In the present embodiment, the valve control unit 102 determines that a predetermined operation has been performed when the acceleration sensor 9 detects acceleration corresponding to knocking on the meter body 10 when the shutoff valve 7 is closed. That is, the shutoff valve 7 is opened. Here, the knocking is an operation of hitting the meter body 10 so as not to damage it, for example, an operation of hitting with a forefinger.

  Here, there is a user who feels uneasy or afraid about whether or not to return the action of pressing the push-type return button. With the above-described return configuration, it is possible to reduce anxiety and fear for such a user. The straight pipe type gas meter 1 according to this embodiment may include a push-in type return button in addition to the above-described return configuration. Moreover, it is preferable that the display control part 101 performs the display which shows which part of the meter body 10 should be knocked.

  Furthermore, in the present embodiment, the microcomputer 100 includes a storage unit (storage unit) 103. The storage unit 103 stores a plurality of information that can be displayed on the display panel 2. Specifically, the storage unit 103 stores, for example, individual integrated values, pressure information, meter information, and the like. The individual integrated value is an integrated value of the flow rate for each flow rate, an integrated value of the gas flow rate used continuously, an integrated value of the flow rate in a specified time zone, or the like. The pressure information includes a current pressure value, a maximum value and a minimum value of the adjustment pressure, and an occlusion pressure. The meter information includes the number of days remaining after the battery voltage drop of the straight tube type gas meter 1 is determined to be shut off, the number of days elapsed since the detection of the minute leak, and information related to the shut-off event of the shut-off valve 7. . The information related to the blocking event is composed of information indicating which function has been blocked and date / time information when the blocking is performed.

  Furthermore, the display control unit 101 according to the present embodiment selects and displays information to be displayed from among a plurality of information stored in the storage unit 103, and also displays the meter body 10 by the acceleration sensor 9 during display control of the information. When acceleration corresponding to knocking is detected, information to be displayed next is selected according to the knocking direction.

  Here, as described above, a large amount of information is stored in the storage unit 103. Conventionally, information to be displayed is selected by operating a push-type return button, but it cannot be said that the operability is good. For this reason, in this embodiment, by selecting the information to be displayed next in accordance with the knock direction, a variety of information that is sensory for the user is selected.

  In addition, the valve control unit 102 causes the shutoff valve 7 to close when the acceleration sensor 9 detects at least three axes of indefinite periodic acceleration. During an earthquake, acceleration with an indefinite period is detected on at least three axes. On the other hand, when a certain object hits the straight pipe type gas meter 1, the acceleration that the straight pipe type gas meter 1 vibrates and periodically attenuates is detected. The valve control unit 102 detects the occurrence of an earthquake when an indefinite period of acceleration is detected, and closes the shut-off valve 7. Thereby, the earthquake detection using the acceleration sensor 9 can be performed, and a seismic device can be made unnecessary. In addition, in addition to said structure, the straight pipe | tube type gas meter 1 which concerns on this embodiment may be further provided with a seismic device.

  Next, the operation of the straight pipe type gas meter 1 according to the present embodiment will be described. FIG. 3 is a first flowchart showing the processing contents of the straight pipe type gas meter 1 according to the present embodiment. As shown in FIG. 3, the microcomputer 100 first inputs a signal from the acceleration sensor 9 (S1). Next, the microcomputer 100 determines the direction of gravity from the signal from the acceleration sensor 9 (S2). At this time, when the microcomputer 100 detects acceleration in a certain direction for a certain time or more, the microcomputer 100 determines that the direction is the direction of gravity. Next, the display control unit 101 determines which of the first to fourth sections the gravity direction detected in step S2 belongs (S3).

  FIG. 4 is a front view of the straight tube type gas meter 1 showing the sections in the direction of gravity. In the present embodiment, as shown in FIG. 4, when the straight pipe type gas meter 1 is viewed from the front, a range of 45 ° on both sides centered on the one end 10 a is defined as the first section, and both sides centered on the other end 10 b. The range of 45 ° is the second section. Further, when the straight pipe type gas meter 1 is viewed from the front, the third segment is a range adjacent to the first segment in the clockwise direction and sandwiched between the first segment and the second segment, and is opposed to the third segment. This is the fourth category. The display control unit 101 determines which of the first to fourth sections the gravity direction belongs to.

  FIG. 3 will be referred to again. After the category determination (after S3), the display control unit 101 controls the orientation of the display information displayed on the display panel 2 according to the category determined in step S3 (S4). That is, when it is determined in step S3 that the direction of gravity is the second section, the display control unit 101 causes the lower end of the display information DD such as letters and numbers to face the second section as shown in FIG. In addition, the direction of the display information DD is controlled. Similarly, in other sections, the direction of the display information DD is controlled so that the lower end of the display information DD faces the section determined in step S3. Thereafter, the process shown in FIG. 3 ends. Note that the process shown in FIG. 3 is repeatedly executed at all times or every predetermined time.

  FIG. 5 is a second flowchart showing the processing contents of the straight pipe type gas meter 1 according to the present embodiment. Further, the microcomputer 100 also executes the process shown in FIG. That is, the microcomputer 100 determines whether a knock operation has been performed (S11). At this time, the microcomputer 100 determines that the knocking operation has been performed, for example, when a periodic acceleration of a predetermined value or more and less than a specified value is detected.

  When it is determined that the knock operation has been performed (S11: YES), the valve control unit 102 determines whether or not the shutoff valve 7 is in the closed state (S12). When it is determined that the shut-off valve 7 is in a closed state (S12: YES), the valve control unit 102 determines that a predetermined valve opening operation has been performed and opens the shut-off valve 7 (S13). Thereafter, the process shown in FIG. 5 ends.

  On the other hand, when it is determined that the shutoff valve 7 is not in the closed state (S12: NO), the display control unit 101 determines whether information display control is being performed (S14). At this time, the display control unit 101 displays a control state (described later) that displays information stored in the storage unit 103 by an operation (including an operation through another device such as a setting device) on the straight pipe gas meter 1. Whether any information D11 to D15, D21 to D24, D31 to D34 of the information D1 to D3 shown in FIG. 6 is displayed is determined.

  If it is determined that the information display control is not in progress (S14: NO), the processing shown in FIG. 5 ends. When it is determined that the display control of information is being performed (S14: YES), the display control unit 101 determines the knocking direction of the knocking operation detected in step S11 (S15). The display control unit 101 determines the knock direction based on, for example, an initial acceleration direction generated by a knock operation. That is, the display control unit 101 determines the knock direction based on which of the first to fourth sections the first acceleration direction corresponds to.

  Next, the display control unit 101 selects information to be displayed based on the knock direction determined in step S16 (S16), and displays the selected information (S17). Thereafter, the process shown in FIG. 5 ends.

  By the way, when it is determined that there has been no knocking operation (S11: NO), the valve control unit 102 determines whether or not an acceleration with an indefinite period has been detected on three axes (S18). If it is determined that no detection has been made (S18: NO), the processing shown in FIG. 5 ends.

  On the other hand, when it is determined that the acceleration of the indefinite period has been detected on the three axes (S18: YES), the valve control unit 102 determines that it is an earthquake and closes the shutoff valve 7 (S19). Thereafter, the process shown in FIG. 5 ends.

  FIG. 6 is a conceptual diagram showing how information is selected in step S17 shown in FIG. First, as shown in FIG. 6, it is assumed that the storage unit 103 stores individual integrated value information D1, pressure information D2, and meter information D3. Further, the individual integrated value information D1 is composed of flow rate integrated values D11 to D13 for each flow rate category, continuously used gas flow rate integrated value D14, and flow rate integrated value D15 information in a specified time zone. Shall. Furthermore, it is assumed that the pressure information D2 includes information on the current pressure value D21, the maximum value D22 and the minimum value D23 of the adjustment pressure, and the closing pressure D24. In addition, the meter information D3 includes the number of remaining days D31 from when a decrease in the battery voltage of the straight tube type gas meter 1 is determined until it is shut off, the number of days D32 and D33 since the minute leak is detected, and the shut-off valve 7 It is assumed that it is composed of information on the interruption event D34.

  6 shows an example in which each information D1 to D3 is configured by four or five pieces of information D11 to D15, D21 to D24, D31 to D34, respectively, for convenience of illustration. D3 may be composed of six or more pieces of information. Moreover, you may have information other than the information D1-D3.

  In such a case, conventionally, the individual integrated value information D1, pressure information D2, and meter information D3 can be switched by long-pressing a push-type return button. That is, when the return button is pressed for a long time during display of any information D11 to D15 of the individual integrated value information D1, the display is switched to the display of the pressure information D2. Similarly, when the return button is pressed for a long time during display of any of the information D21 to D24 of the pressure information D2, the display is switched to the display of the meter information D3, and any of the information D31 to D34 of the meter information D3 is being displayed. When the return button is pressed for a long time, the display is switched to the display of the individual integrated value information D1.

  Conventionally, the information D11 to D15, D21 to D24, and D31 to D34 can be switched by pressing the push type return button for a short time. For example, when the return button is pressed for a short time while the information of the extra large flow rate integrated value D11 is displayed, the display is switched to the information of the large flow rate integrated value D12. Thereafter, similarly, the information of the integrated flow rate value D13 of the medium flow rate, the information of the integrated value D14 of the continuous use flow rate, and the information of the integrated flow rate value D15 in the designated time zone are switched in this order. If the return button is pressed for a short time while is displayed, the flow returns to the information of the integrated flow value D11 of the extra large flow rate. The same applies to the pressure information D2 and the meter information D3.

  However, the conventional push-type return button can only perform the one-way display switching as described above (the switching of the symbol A2 cannot be performed only by the switching of the symbol A1), and is not convenient. On the other hand, in the present embodiment, since information to be displayed is selected based on the knock direction, it is possible to select sensory and diverse information.

  For example, when the straight pipe type gas meter 1 is viewed from the front and knocked from the right side of the meter body 10, the selected information can be switched to the reverse of the conventional push-type return button. That is, when the information of the integrated value D14 of the continuous use flow rate is displayed, if the knock operation is performed from the right side of the meter body 10, the information of the integrated flow rate value D13 of the medium flow rate is selected as shown by reference numeral A2. You can switch to Similarly, when the straight pipe type gas meter 1 is viewed from the front and knocked from the lower side of the meter body 10, the selected information can be switched to the reverse of the conventional push-type return button. That is, when a knock operation is performed from the lower side during display of any one of the pieces of information D21 to D24 of the pressure information D2, it is possible to switch so as to select the individual integrated value information D1 as indicated by reference numeral A2.

  Further, when the straight tube type gas meter 1 is viewed from the front and knocked from the upper side or the left side of the meter body 10, as shown by reference numeral A1, display switching similar to switching of a conventional push-in return button can be performed. it can.

  By selecting such display information, sensory and diverse information can be selected.

  In this way, according to the straight pipe type gas meter 1 according to the present embodiment, in order to control the direction of the display information displayed on the display panel 2 according to the direction of gravity, it is installed vertically or horizontally. Even if it is, the direction of the display information can be controlled, and an appropriate display can be performed according to the attachment state.

  The valve control unit 102 opens the shut-off valve 7 when a predetermined operation is performed when the shut-off valve 7 is closed. When acceleration corresponding to knocking to the meter body 10 is detected, the predetermined operation is performed. Judge that there was. For this reason, it is not necessary to provide the straight pipe type gas meter 1 with the same shut-off valve return button (push-type return button) as in the prior art. In particular, there are some users who feel anxious or scared about the act of pressing the push-in return button, but this may lead to a reduction in anxiety and fear. it can. Further, the straight pipe type gas meter 1 is compact because it is configured to extend in one direction, and there is a problem in space to install the push-in type return button, which causes an increase in size. Since there is no need to provide a button, it is possible to provide a return configuration of the shut-off valve 7 suitable for the straight pipe gas meter 1.

  The acceleration sensor 9 detects acceleration in three axis directions. When the acceleration sensor 9 detects acceleration with an indefinite period on three axes, the shut-off valve 7 is closed to optimize the display. In addition, by using the acceleration sensor 9 installed to realize the operation function, it is possible to perform the same earthquake detection as that of the conventional seismoscope.

  Information to be displayed is selected and displayed from a plurality of stored information, and when acceleration corresponding to knocking to the meter body 10 is detected by the acceleration sensor 9, information to be displayed next according to the knocking direction. Select. For this reason, it is possible to select a variety of information that is sensuous to the user according to the knocking direction (for example, four directions) compared to the push-in type return button.

  As described above, the present invention has been described based on the embodiments, but the present invention is not limited to the above-described embodiments, and may be modified without departing from the spirit of the present invention, and may be appropriately changed within a possible range. These techniques may be combined.

  For example, in the above-described embodiment, the gas flow path 13 is illustrated with a broken line as a complete straight shape. Even if it has such a degree of bending and bending, there is no hindrance to making the gas meter a straight pipe type, so such a gas flow path 13 is also included in the concept of a straight shape. Further, bending for providing a solenoid valve or a motor valve is allowed.

  In the above description, it is determined which of the four categories the gravity direction corresponds to, and the direction of the display information is controlled according to this. However, the number of categories is not limited to four, and any number may be used. In particular, the number of sections may be 360 or more, and even when the straight pipe type gas meter 1 is installed in an oblique direction, the lower end of the letters and numbers may be in the direction of gravity.

  Further, in the present embodiment, the acceleration sensor 9 detects acceleration in the three-axis direction. However, when the earthquake detection is not performed based on the acceleration sensor 9, the three axes are not necessary and the two axes may be used. Good. Further, when earthquake detection is performed based on the acceleration sensor 9, not only three axes but also a sensor capable of detecting acceleration of four or more axes such as a six-axis sensor may be used.

1: Straight pipe type gas meter 2: Display panel (display unit)
5: Flow velocity sensor 6: Pressure sensor 7: Shut-off valve 8: Communication unit 9: Acceleration sensor 10: Meter body 10a: One end 10b: Other end 10c: Front portion 11: Gas inlet 12: Gas outlet 13: Gas Flow path 100: Microcomputer 101: Display control unit (display control means)
102: Valve control unit (valve control means)
103: Storage unit (storage means)

Claims (4)

A gas inlet for introducing gas, a gas outlet for discharging gas, a straight gas passage extending from the gas inlet to the gas outlet, and a gas flowing through the gas passage. A straight pipe type gas meter having a flow rate sensor for measuring the flow rate of the gas and a display unit for displaying an integrated value of the gas flow rate based on a measurement value measured by the flow rate sensor,
An acceleration sensor that outputs a signal corresponding to at least the direction of gravity;
Display control means for controlling the direction of display information displayed on the display unit in accordance with the direction of gravity based on a signal from the acceleration sensor;
A straight pipe type gas meter comprising: A shut-off valve for closing the gas flow path; and valve control means for opening the shut-off valve when a predetermined operation is performed when the shut-off valve is in a valve-closed state, and
The valve control means determines that the predetermined operation has been performed when acceleration corresponding to knocking to the meter body is detected by the acceleration sensor when the shut-off valve is in a valve-closed state. Item 2. A straight pipe type gas meter according to item 1. The acceleration sensor detects acceleration in at least three axis directions orthogonal to each other,
The straight pipe type gas meter according to claim 2, wherein the valve control means closes the shut-off valve when an acceleration with an indefinite period is detected in the three-axis direction by the acceleration sensor. A storage means for storing a plurality of information that can be displayed on the display section;
The display control means selects and displays information to be displayed from a plurality of information stored by the storage means, and when acceleration corresponding to knocking to the meter body is detected by the acceleration sensor, the display control means The straight pipe type gas meter according to any one of claims 1 to 3, wherein information to be displayed next is selected accordingly.

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