JP6675900B2 - Straight pipe gas meter - Google Patents

Description

  The present invention relates to a straight pipe gas meter.

  Conventionally, a gas meter has a structure in which a gas inlet and a gas outlet are provided at an upper portion of the meter, and a U-shaped flow path is formed inside the gas meter. Is provided (for example, see Patent Document 1).

JP 2006-292377 A

  Here, the present applicant has improved the gas meter described in Patent Document 1 and has proposed a straight pipe gas meter in which a flow path inside the meter is formed in a substantially straight line. Such a straight pipe type gas meter can be installed in various orientations such as vertical and horizontal, but the display on the front may not have the corresponding display contents for each of these orientations. There is.

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

  A straight-tube gas meter according to the present invention includes a gas inlet formed in a meter body for introducing a gas, a gas outlet for discharging a gas, and a straight gas passage extending from the gas inlet to the gas outlet. And a flow rate sensor for measuring the 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 the measurement value measured by the flow rate sensor. An acceleration sensor that outputs a signal corresponding to at least a direction of gravity, and a display control unit that controls a direction of display information displayed on the display unit according to a direction of gravity based on a signal from the acceleration sensor. It is characterized by having.

  According to this straight pipe type gas meter, the direction of the display information displayed on the display unit is controlled according to the direction of gravity, so that the direction of the display information is controlled even if the display information is installed vertically or horizontally. It is possible to perform an appropriate display according to the mounting 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. Wherein the valve control means determines that the predetermined operation has been performed when the acceleration sensor detects acceleration corresponding to knock on the meter body when the shutoff valve is in the valve closed state. It is characterized by the following .

  According to this straight pipe type gas meter, there is provided 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, and acceleration corresponding to knock on the meter body is detected. In this case, it is determined that a predetermined operation has been performed. Therefore, it is not necessary to provide a return button (push-in type return button) for the shut-off valve in the straight pipe type gas meter as in the related art. In particular, there is a user who feels anxious or scared about whether or not the act of pressing the push-in return button may be restored, but for such a user, it is possible to reduce anxiety and fear. it can.

In the straight pipe type gas meter of the present invention, the gas meter further includes a storage unit that stores a plurality of pieces of information that can be displayed on the display unit, and the display control unit includes information that is displayed from the plurality of pieces of information stored by the storage unit. When the acceleration sensor detects an acceleration corresponding to a knock with respect to the meter body while the shut-off valve is not in the valve-closed state and the information display control is being performed, the knock direction is displayed. It is preferable to select the information to be displayed next according to.

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

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

  According to this straight pipe type gas meter, the acceleration sensor detects acceleration in at least three axial directions, and closes the shut-off valve when the acceleration sensor detects acceleration with an irregular period in three axes. By using an acceleration sensor installed for realizing the appropriate display and operating functions, it is possible to perform the same earthquake detection as the conventional seismic sensor.

  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 appearance perspective view of a straight pipe type gas meter concerning this embodiment. FIG. 2 is a control block diagram of the straight-tube 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 pipe | tube type gas meter which shows the division of a gravity direction. It is a 2nd flowchart which shows the processing content of the straight pipe | tube type gas meter which concerns on this embodiment. FIG. 6 is a conceptual diagram showing a state of information selection in step S17 shown in FIG.

  Hereinafter, the present invention will be described along 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. In addition, in the embodiments described below, some components are not illustrated or described, but details of the omitted technologies are within a range that does not cause inconsistency with the content described below. Needless to say, a well-known or well-known technique is appropriately applied.

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

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

  The meter body 10 has a gas inlet 11 for introducing gas into one end 10a in the longitudinal direction and a gas outlet 12 for discharging gas from 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 connection between the gas inlet 11 and the upstream pipe 200 and 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 a pushing operation) is used. I have.

  One gas flow path 13 from the gas inlet 11 to the gas outlet 12 is formed inside the meter body 10. In the present embodiment, the gas flow path 13 has a straight shape that extends substantially linearly from the gas inlet 11 to the gas outlet 12.

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

  The display panel 2 is configured by an LCD or the like, and is provided on a front portion 10c of the meter body 10. The display panel 2 is controlled by the microcomputer 100 and displays information processed by the microcomputer 100. Representative 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 rate sensor 5.

  The flow rate sensor 5 is provided in a gas flow path 13 inside the gas meter 1. The flow rate sensor 5 measures the flow (specifically, flow rate) of the gas passing through the gas flow path 13 and outputs a signal corresponding to the flow rate. The signal output from the flow rate 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 passage 13 is substantially straight, the gas inlet 11, the gas outlet 12, and the flow rate 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 sensor or a capacitance sensor can be used.

  The shutoff valve 7 is provided in the gas flow path 13 inside the gas meter 1 and is for shutting off the gas flow path 13. As the shutoff 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 path rotatably in a valve body, and opens or shuts off gas by rotating the valve body around a valve shaft. By using a ball valve as the shutoff valve 7, it is possible to reduce the size of the shutoff valve 7 itself, and thus to reduce the size of the meter body 10 and reduce the pressure loss.

  The communication unit 8 is for the microcomputer 100 of the straight pipe type gas meter 1 to communicate with external devices (setting device, meter reading device or center device). The communication unit 8 includes terminals through which various signals are input / output (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, and the like). It can be configured with a terminal block, a wireless communication device using radio waves or light, or the like.

  The microcomputer 100 is a control unit that controls the entire straight tube gas meter 1. The microcomputer 100 is mounted on, for example, a control board, and the control board is housed inside 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 content of the display panel 2 of the front part 10c may not be corresponding to each of these directions. For example, a display in which the gas inlet 11 is always on the upper side is performed, and if the gas inlet 11 is installed horizontally, there is a possibility that a numeral or the like is displayed in a state where the gas inlet 11 is turned sideways.

  Therefore, the straight pipe type gas meter 1 according to the present embodiment further includes the acceleration sensor 9, and the microcomputer 100 executes the program in the ROM (not shown) to control the display control unit (display control unit) 101. Let 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 accelerations in three axial directions orthogonal to each other, and outputs signals corresponding to accelerations in other directions 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 particularly controls the direction of the display information displayed on the display panel 2 according to the direction of gravity based on the signal from the acceleration sensor 9. is there. That is, regardless of whether the mounting posture of the straight pipe type gas meter 1 is vertical or horizontal, the display control unit 101 transmits the display information such that the upper side of the characters and numerals displayed on the display panel 2 faces vertically upward. Control the orientation. Thus, an appropriate display state can be obtained regardless of the mounting posture.

  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 shut-off valve 7 when the shut-off valve 7 is closed, and shuts off using a signal from the acceleration sensor 9. The structure is such that the valve 7 is returned.

  More specifically, the microcomputer 100 executes a program in a ROM (not shown) so that the valve control unit (valve control means) 102 functions. The valve control unit 102 opens the shut-off valve 7 when a predetermined operation is performed while the shut-off valve 7 is in the valve closed state. In the present embodiment, when the acceleration sensor 9 detects acceleration corresponding to knock on the meter body 10 when the shutoff valve 7 is closed, the valve control unit 102 determines that a predetermined operation has been performed. That is, the shutoff valve 7 is opened. Note that the knock here is an operation of hitting the meter body 10 to such an extent that the meter body 10 is not damaged, for example, an operation of hitting the meter finger 10 with an index finger.

  Here, there is a user who feels uneasy or scared as to whether the act of pressing the push-in type return button may be returned. In the above-described return configuration, it is possible to reduce anxiety and fear for such a user. In addition, the straight pipe type gas meter 1 according to the present embodiment may include a push-in type return button in addition to the above-described return configuration. Further, it is preferable that the display control unit 101 performs display indicating which part of the meter body 10 should be knocked.

  Further, in the present embodiment, the microcomputer 100 includes a storage unit (storage unit) 103. The storage unit 103 stores a plurality of pieces 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 a flow rate for each flow rate category, an integrated value of a gas flow rate used continuously, an integrated value of a flow rate in a designated time zone, and the like. The pressure information includes a current pressure value, a maximum value and a minimum value of the adjustment pressure, a closing pressure, and the like. The meter information includes the number of remaining days from when the battery voltage of the straight pipe type gas meter 1 is judged to be low to when the battery voltage is cut off, the number of days since the minute leak is detected, and information on the shut-off event of the shut-off valve 7. . The information on the interruption event includes information on which function was interrupted and information on the date and time when the interruption was performed.

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

  Here, as described above, the storage unit 103 stores a lot of information. Conventionally, information to be displayed is selected by operating a push-in type return button, but the operability is not always good. For this reason, in the present embodiment, by selecting the information to be displayed next according to the knocking direction, the user can select a variety of information sensuously and sensibly.

  In addition, the valve control unit 102 closes the shutoff valve 7 when the acceleration sensor 9 detects an irregular-period acceleration in at least three axes. At the time of an earthquake, at least three-axis, irregular-cycle acceleration is detected. On the other hand, when an object hits the straight pipe gas meter 1, an acceleration at which the straight pipe gas meter 1 vibrates and attenuates periodically is detected. The valve control unit 102 detects the occurrence of an earthquake when an irregular-cycle acceleration is detected, and closes the shutoff valve 7. Thus, earthquake detection using the acceleration sensor 9 can be performed, and the need for a seismic sensor can be eliminated. In addition, the straight pipe type gas meter 1 according to the present embodiment may further include a seismic sensor in addition to the above configuration.

  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 content of the straight pipe 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 of the acceleration sensor 9 (S2). At this time, if an acceleration in a certain direction is detected 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 to (S3).

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

  FIG. 3 is referred to again. After the classification (after S3), the display control unit 101 controls the direction of the display information displayed on the display panel 2 according to the classification determined in step S3 (S4). That is, when it is determined in step S3 that the direction of gravity is the second division, the display control unit 101 sets the lower end of the display information DD such as characters and numbers to face the second division as shown in FIG. Next, the direction of the display information DD is controlled. Similarly, in other sections, the direction of the display information DD is controlled such that the lower end of the display information DD faces the section determined in step S3. Thereafter, the process illustrated in FIG. 3 ends. Note that the process shown in FIG. 3 is executed constantly or repeatedly at predetermined time intervals.

  FIG. 5 is a second flowchart showing the processing content of the straight pipe gas meter 1 according to the present embodiment. Further, the microcomputer 100 also executes the processing 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 a knock operation has been performed, for example, when a periodic acceleration that is equal to or more than a predetermined value 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 the shut-off valve 7 is in the valve closed state (S12). When determining that the shutoff valve 7 is in the valve closed state (S12: YES), the valve control unit 102 determines that a predetermined valve opening operation has been performed, and opens the shutoff valve 7 (S13). Thereafter, the processing illustrated in FIG. 5 ends.

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

  When it is determined that the information display control is not being performed (S14: NO), the processing illustrated in FIG. 5 ends. If it is determined that information display control is being performed (S14: YES), the display control unit 101 determines the knock direction of the knock operation detected in step S11 (S15). The display control unit 101 determines the knock direction based on, for example, the first 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 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 processing illustrated in FIG. 5 ends.

  By the way, when it is determined that the knocking operation has not been performed (S11: NO), the valve control unit 102 determines whether the acceleration of the irregular cycle is 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 irregular-cycle acceleration is detected on three axes (S18: YES), the valve control unit 102 determines that the earthquake is occurring, and closes the shutoff valve 7 (S19). Thereafter, the processing illustrated 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 information D <b> 1 of the individual integrated value, pressure information D <b> 2, and meter information D <b> 3 are stored in the storage unit 103. Further, the information D1 of the individual integrated value is constituted by information of the integrated value D11 to D13 of the flow rate for each flow rate category, the integrated value D14 of the gas flow rate used continuously, and the integrated value D15 of the flow rate in the designated time zone. Shall be. Further, it is assumed that the pressure information D2 includes information on a current pressure value D21, a maximum value D22 and a minimum value D23 of the adjustment pressure, and a closing pressure D24. In addition, the meter information D3 includes the number of remaining days D31 from when the battery voltage of the straight pipe type gas meter 1 is determined to be cut off to when it is shut off, the number of days D32 and D33 since the minute leak is detected, and the shutoff valve 7. Of the interruption event D34.

  FIG. 6 shows an example in which each of the information D1 to D3 is composed of four or five pieces of information D11 to D15, D21 to D24, and D31 to D34 for convenience of illustration. D3 may be composed of six or more pieces of information. Further, information other than the information D1 to D3 may be included.

  In such a case, the information D1, the pressure information D2, and the meter information D3 of the individual integrated value can be switched by long-pressing the push-in type return button in the related art. That is, if the return button is pressed for a long time while any one of the information D1 to D15 of the individual integrated value information D1 is displayed, the display is switched to the pressure information D2. Similarly, if the return button is held down while any of the information D21 to D24 of the pressure information D2 is displayed, 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 information D1 of the individual integrated value.

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

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

  For example, when the straight pipe type gas meter 1 is knocked from the right side of the meter body 10 when viewed from the front, the selected information can be switched in the opposite manner to the conventional push-in type return button. That is, when the knocking operation is performed from the right side of the meter body 10 while the information of the integrated value D14 of the continuous use flow rate is displayed, the information of the integrated flow rate D13 of the medium flow rate is selected as indicated by reference numeral A2. You can switch to Similarly, when the straight pipe type gas meter 1 is viewed from the front and the knocking operation is performed from below the meter body 10, the selected information can be switched in the opposite manner to the conventional push-in type return button. That is, when the knocking operation is performed from the lower side while any of the information D21 to D24 of the pressure information D2 is displayed, switching can be performed so as to select the information D1 of the individual integrated value as indicated by reference numeral A2.

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

  By selecting such display information, it is possible to select sensory and various information.

  In this way, according to the straight pipe type gas meter 1 according to the present embodiment, since the direction of the display information displayed on the display panel 2 is controlled in accordance with the direction of gravity, it is installed vertically or horizontally. Even if it does, the direction of the display information can be controlled, and an appropriate display can be performed according to the mounting 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 an acceleration corresponding to knock on the meter body 10 is detected, the predetermined operation is performed. Judge that there was. For this reason, there is no need to provide a return button (push-in type return button) for the shut-off valve in the straight pipe gas meter 1 as in the conventional case. In particular, there is a user who feels anxious or scared about whether or not the act of pressing the push-in return button may be returned, but for such a user, it is possible to reduce 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 space problem in installing the push-in type return button, resulting in an increase in size. Since there is no need to provide a button, a return configuration of the shut-off valve 7 suitable for the straight pipe gas meter 1 can be provided.

  Further, the acceleration sensor 9 detects acceleration in three axis directions. When the acceleration sensor 9 detects an indefinite period of acceleration in three axes, the shutoff valve 7 is closed. By using the acceleration sensor 9 installed for realizing the operation function, it is possible to further perform the same earthquake detection as the conventional seismic sensor.

  In addition, when information to be displayed is selected from a plurality of pieces of stored information and displayed, and the acceleration sensor 9 detects an acceleration corresponding to a knock with respect to the meter body 10, information to be displayed next according to the knocking direction is determined. Select For this reason, compared to the push-in type return button, it is possible for the user to select sensibly and various information according to the knock direction (for example, four directions).

  As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and may be modified without departing from the spirit of the present invention. May be combined.

  For example, in the above-described embodiment, the gas flow path 13 is illustrated by a broken line as a completely straight shape, but is not limited thereto. The gas flow path 13 is included in the concept of the straight shape because such gas flow path 13 is acceptable and does not hinder the straightness of the gas meter even if it has such a degree of bending and bending. Further, bending for providing a solenoid valve or a motor valve is also allowed.

  In the above description, it is determined which of the four directions the gravity direction corresponds to, and the direction of the display information is controlled in accordance with the determination. However, the number of the sections is not limited to four and may be any number. In particular, the number of divisions may be 360 or more, and even when the straight pipe type gas meter 1 is installed in an oblique direction, the lower ends of characters and numerals may be in the direction of gravity.

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

1: straight pipe gas meter 2: display panel (display section)
5: Flow velocity sensor 6: Pressure sensor 7: Shutoff valve 8: Communication unit 9: Acceleration sensor 10: Meter body 10a: One end 10b: Other end 10c: Front part 11: Gas inlet 12: Gas outlet 13: Gas Channel 100: microcomputer 101: display control unit (display control means)
102: Valve control unit (valve control means)
103: storage unit (storage means)

Claims (3)

A gas inlet formed in the meter body 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 flow rate sensor for measuring the flow rate of, a straight pipe type gas meter including a display unit that displays an integrated value of the gas flow rate based on the 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 according to the direction of gravity based on a signal from the acceleration sensor,
A shutoff valve closing the gas flow path;
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,
The valve control means determines that the predetermined operation has been performed when the acceleration sensor detects acceleration corresponding to knock on the meter body when the shut-off valve is in the valve closed state. Tube type gas meter. The acceleration sensor detects acceleration in at least three axial directions orthogonal to each other,
2. The straight pipe gas meter according to claim 1, wherein the valve control unit closes the shutoff valve when the acceleration sensor detects irregular-period acceleration in the three-axis directions. 3. A storage unit that stores a plurality of pieces of information that can be displayed on the display unit,
The display control means selects and displays information to be displayed from a plurality of pieces of information stored by the storage means , and when the shut-off valve is not in a valve-closed state and the display control of information is being performed. 3. The linear sensor according to claim 1, wherein when acceleration corresponding to knocking on the meter body is detected by the acceleration sensor, information to be displayed next is selected according to the knocking direction. Tube type gas meter.

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