Fluid meter with standby output circuit

Abstract

A fluid meter configured to perform metrological measurements in a fluid circulation pipe, comprising: - an electric generator (12) configured to be driven by the fluid circulation, - at least one metrological sensor (4) configured to perform metrological measurements in the fluid pipe (2), - a control block (6) configured to receive the metrological measurements, - a first standby output circuit (20) coupled to the electric generator (12) at a first end (22) and to the control block (6) at a second end (24), and configured to generate an edge on a first electrical signal (INT1) at the second end in response to the establishment of a voltage at the first end caused by the driving of the electric generator by the fluid circulation, the control block being configured to implement a standby output of the fluid meter in response to the edge on the first electrical signal.Figure 1.

Description

Title of the invention: Fluid meter with standby output circuit Technical field

[0001] The invention belongs to the technical field of fluid meters. A fluid meter is a metrology device configured to perform metrological measurements in a fluid circulation pipeline. The fluid may be liquid, such as water or oil, or gaseous, such as a gaseous mixture of hydrocarbons consisting mainly of methane such as natural gas. The metrological measurements are generally a volume or a flow rate relative to the fluid circulating in the pipeline. Technological background

[0002] In order to know certain metrological data concerning the circulation of a fluid in a pipeline, a fluid meter is usually used to generate and make available metrological measurements. In order to record these metrological measurements, fluid meters equipped with means for communicating information relating to said metrological data have been developed. These communication means can be adapted for remote communication, and for example allow wired or wireless transmission of this information. The communication means can also present several pieces of information in a display, organized according to menus. In all cases, these metrological meters require a power supply.However, the meters may be located in locations that do not allow easy connection to the electricity network, so they must have an independent power supply, not connected to the electricity network.

[0003] The simplest way to supply electricity autonomously to a fluid meter is to equip it with an electric battery, that is to say an energy storage element that cannot be recharged in situ. The energy storage capacity must, however, be sufficient to allow a power supply for a long period (typically 20 years), which results in the use of very large batteries. In addition, the battery life depends on the electricity consumption of the meter, which can significantly reduce the battery life, which in any case eventually runs out and must be changed, a tedious operation requiring monitoring of the battery's condition.

[0004] In order to overcome these drawbacks, it has been proposed to replace the electric battery with a rechargeable battery, for example powered by an electric generator configured to be driven by the circulation of the fluid in the pipe and generate electricity recharging the battery. However, the potentially intermittent aspect of fluid circulation requires a battery with a large electrical storage capacity, which results in high bulk and costs. Presentation of the invention

[0005] The invention therefore aims to propose a fluid meter equipped with a standby entry and exit functionality which makes it possible to significantly reduce the electrical consumption of the fluid meter without altering the responsiveness of the fluid meter.

[0006] To this end, the invention proposes a fluid meter configured to carry out metrological measurements in a fluid circulation pipe and to communicate information relating to said metrological data, comprising: - an electric generator configured to be driven by the circulation of the fluid in the fluid pipe and generate electricity, - at least one metrological sensor configured to perform metrological measurements in the fluid pipeline, - a control block configured to receive metrological measurements and to communicate information relating to said metrological data, and the fluid meter includes a first wake-up circuit coupled to the electrical generator at a first end and to the control unit at a second end, the first circuit configured to generate an edge on a first electrical signal at the second end in response to the establishment of a voltage at the first end caused by the driving of the electrical generator by the circulation of the fluid in the pipeline, the control unit configured to implement a wake-up of the fluid meter in response to the edge on the first electrical signal at the second end.

[0007] Thanks to the first standby exit circuit, the fluid meter can be in deep standby, in a very energy-efficient manner since the first standby exit circuit does not include any active component consuming electrical energy, and can however exit standby immediately at the appropriate time, namely when metrological measurements are to be made, i.e. when the circulation of fluid in the pipeline resumes.

[0008] The fluid meter is advantageously supplemented by the following different characteristics taken alone or according to their different possible combinations: - the fluid meter is configured to perform metrological measurements in the fluid pipeline following exit from standby, and to return to standby depending on the circulation of fluid in the pipeline; - the fluid meter is configured to return to standby when measurements metrological data indicate a zero flow rate for a given initial time or when the electric generator is no longer driven by the circulation of the fluid in the fluid pipe; - the first circuit comprises a transistor configured to turn on in response to the voltage being established at the first end; - the transistor has its gate or base connected to the first end and to a first resistor, and is connected to a working voltage by a second resistor, the second end to which the first electrical signal is applied being connected between the transistor and the second resistor; -the fluid meter further comprises a second standby output circuit comprising a controller coupled to the control block by a third end, the controller being configured so that its actuation causes an edge on a second electrical signal at the third end, the control block being configured to implement a standby output of the fluid meter in response to the edge on the second electrical signal at the third end - the control block is configured to implement human-machine interface management comprising the communication of information relating to said metrological data following the exit from standby of the fluid meter, the fluid meter being configured to return to standby when a human-machine interface standby criterion is met; - the human-machine interface standby criterion is an absence of actuation of the control device for a given second time; - the communication of information relating to metrological data is carried out by display on a screen and / or by transmission of said metrological data - the front is a falling front.

[0009] The invention also relates to a method for managing the monitoring of a fluid meter configured to carry out metrological measurements in a fluid circulation pipe and to communicate information relating to said metrological data according to the invention, the method comprising: - during a standby of the fluid meter during which a metrological sensor configured to perform metrological measurements in the fluid pipe does not perform metrological measurements, monitoring by a control block of the occurrence of an edge on a first electrical signal at a second end of a first standby output circuit coupled at a first end to an electrical generator configured to be driven by the circulation of the fluid in the fluid pipe and generate electricity, - following detection by the control block of an edge on the first electrical signal at the second end, the implementation by the control block of a waking up the fluid meter in response to the edge on the first electrical signal at the second end, and - the control unit causes the fluid meter to go into standby mode depending on the fluid circulation in the pipeline.

[0010] Preferably, the control block: - monitors during a standby of the fluid meter the occurrence of an edge on a second electrical signal at a third end of a second standby output circuit, - implements a standby output of the fluid meter in response to an edge on the second electrical signal at the third end, - implements human-machine interface management including the communication of information relating to said metrological data following the fluid meter coming out of standby mode, - causes the fluid meter to go into standby mode when a human-machine interface standby criterion is met.

[0011] The invention also relates to a computer-readable computer program product comprising instructions which, when the program is executed by a control block of a fluid meter according to the invention, cause said control block to implement the steps of the method according to the invention. The computer program product is typically a non-transitory computer-readable medium comprising instructions which, when the program is executed by a control block of a fluid meter according to the invention, cause said control block to implement the steps of the method according to the invention. Such a computer-readable medium may be, for example, a hard disk, an SSD disk, a flash memory, or an optical disk. Presentation of figures

[0012] Other characteristics, aims and advantages of the invention will emerge from the following description, which is purely illustrative and non-limiting, and which must be read in conjunction with the appended drawings in which:

[0013] - [Fig.l] is a schematic overview of a fluid meter according to a possible embodiment of the invention;

[0014] - [Fig.2] is a diagram of exit from standby by the turbine of a counter of fluid according to a possible embodiment of the invention;

[0015] - [Fig.3] is a diagram of exiting standby by pressing the control member of a fluid meter according to a possible embodiment of the invention. Detailed description

[0016] [Fig.l] shows a fluid meter configured to perform metro- logic in a fluid circulation pipe 2 and to communicate information relating to said metrological data. Typically, the fluid circulation pipe 2 is part of the fluid meter in the sense that the fluid meter comprises a portion of pipe in which the fluid circulates, which is integrated into the fluid circulation network. To carry out metrological measurements, the fluid meter comprises at least one metrological sensor 4 configured to carry out metrological measurements in the fluid pipe 2. The metrological sensor 4 is preferably arranged in the fluid pipe 2. The type of metrological sensor 4 depends on the technology used to carry out the measurements, which may be ultrasonic, electromagnetic, thermal or Coriolis effect technology.In the example illustrated, two ultrasonic transducers are arranged opposite each other in the pipeline in order to carry out metrological measurements by ultrasound, in a known manner. The metrological measurements are generally a volume or a flow rate relative to the fluid circulating in the pipeline 2, derived from the data collected by the metrological sensor(s) 4.

[0017] The fluid meter comprises a control unit 6 comprising at least one processor and one memory, and which is configured to receive the metrological measurements from the metrological sensor 4, and to communicate the information relating to said metrological data. Typically, the metrological sensor 4 can be connected to the control unit 6, for example by a wired connection, and transmits the metrological measurements to the control unit 6.

[0018] The communication of the information relating to the metrological data is carried out by display on a screen and / or by transmission. The fluid meter may have a display screen 7 where the information relating to the metrological data can be displayed. The fluid meter may be provided with a human-machine interface such as a button making it possible to cause the display of this information relating to the metrological data, and possibly to vary this display, for example by making it possible to scroll through different types on the display screen 7. The information relating to the metrological data may be transmitted outside the fluid meter, preferably by a wireless link, in which case the fluid meter may comprise an antenna and any other known element making it possible to establish remote communication with the fluid meter.Information relating to metrological data can for example be an instantaneous flow rate, a cumulative flow rate (a volume), an average flow rate, etc.

[0019] Preferably, the fluid meter complies with European Union Directive 2014 / 32 / EU on measuring instruments, better known by the English acronym MID for "Measuring Instruments Directive". In particular, the fluid meter must be able to continuously communicate information. training in metrological data. Similarly, the fluid meter must be able to perform metrological measurements at any time. Therefore, the fluid meter must have a permanent power supply.

[0020] For this purpose, the fluid meter comprises a power supply unit 10 configured to permanently supply electricity to the control unit 6. The power supply unit 10 comprises at least one energy storage element, and in particular at least one battery or cell. A battery (or "primary cell" in English) is understood to mean an electrical energy storage element which cannot be recharged, or whose configuration in the power supply unit makes charging within this power supply unit impossible. The battery preferably has a maximum energy reserve of less than 100 Wh, such as for example 30.6 Wh (8.5 Ah on 3.6 V) or 68.4 Wh (19 Ah on 3.6 V).

[0021] The fluid meter also comprises an electrical generator 12 configured to be driven by the circulation of the fluid in the pipe and generate electricity. Preferably, the electrical generator 12 is coupled to the control unit 6, for example to the power supply unit 10. At least a portion of the electrical generator 12 is arranged in the pipe 2 in contact with the fluid in order to take mechanical energy and convert it into electricity. Typically, this electrical generator 12 is a turbine, preferably with blades, integrating a rotor and a stator. The electrical generator 12 provides electricity available outside the pipe 2. Preferably, the electrical generator 12 is arranged downstream, in the direction of circulation of the fluid, relative to the metrological sensor 4 in the fluid pipe 2, so as not to disturb these metrological measurements.

[0022] In addition to or as an alternative to the battery, the power supply unit 10 may comprise an electrical energy storage element rechargeable by the electrical generator 12. In this case, the electrical generator 12 may be coupled to the power supply unit 10 of the control unit 6 to power the rechargeable electrical energy storage element. The rechargeable electrical energy storage element may for example be a rechargeable battery or a capacitor, preferably having a maximum energy reserve Emax greater than or equal to 0.5 Wh, and more preferably greater than or equal to 0.8 Wh. The capacitor is preferably a supercapacitor. Typically, the capacitor may be a hybrid layer supercapacitor, or HLC for the English “Hybrid Layer Capacitor”, but may also be any type of supercapacitor making it possible to offer a maximum energy reserve Emax greater than or equal to 0.5 Wh.Preferably, the maximum energy Emax of the capacitor is at least 20 times lower than the maximum energy of a battery if one is present. For example, the rechargeable electrical energy storage element can deliver a . electric charge of 0.222 Ah on 3.6 V.

[0023] In standby mode, the fluid meter does not implement metrological measurements in the fluid pipe. For example, when the metrological sensor 4 comprises ultrasonic transducers, these do not emit ultrasound when the fluid meter is in standby mode. Similarly, in standby mode, there is no communication of information relating to the metrological data, for example by display on a screen and / or by transmission of said metrological data. All or most of the functions of the fluid meter can be deactivated during standby mode. The electrical consumption is then zero or almost zero, which makes it possible not to consume the energy of the electrical storage element such as the battery or the capacitor. The electrical storage element can then be chosen with a lower storage capacity, reducing its volume and its cost.

[0024] However, it is appropriate to be able to wake up the fluid meter from standby as efficiently as possible. With reference to [Fig.l] and [Fig.2], the fluid meter comprises a first electrical circuit 20 coupled to the electrical generator 12 at a first end 22 and to the control unit 6 at a second end 24. In the absence of fluid circulation in the fluid pipe 2, the electrical generator 12 does not rotate and there is no voltage across the first end 22 coupled to the electrical generator. When the electrical generator 12 is driven by the circulation of the fluid in the fluid pipe 2, a non-zero voltage V1 appears across the first end 22, which reflects the electricity generated by the electrical generator 12. A first electrical signal INT1 is applied to the second end 24.The first electrical circuit 20 is configured to generate an edge on the first electrical signal INT1 at the second end 24 in response to the establishment of a voltage VI at the first end caused by the driving of the electrical generator by the circulation of the fluid in the fluid pipe 2.

[0025] The first electrical circuit 20 comprises a transistor Q1 configured to turn on in response to the establishment of the voltage VI at the first end 22. Preferably, the transistor is an NPN rather than a PNP transistor. More specifically, the transistor Q1 has its gate or base connected to the first end 22 and to a first resistor RI connected to ground, and is connected to a working voltage Vcc by a second resistor R2, the second end 24 to which the first signal INT1 is applied being connected between the transistor Q1 and the second resistor R2. The working voltage Vcc is typically chosen to allow the various powered components to operate, and may be between 3 V and 4 V, and is for example 3.3 V. The resistors RI and R2 may for example have resistance values ​​between 0.5 and 10 kΩ.

[0026] In this example, transistor Q1 is an NPN bipolar transistor whose base is coupled to the first end 22, while its emitter is connected to ground (or to any other voltage different from the working voltage and allowing the transistor Q1 to become conductive), and that its collector is coupled both to the second resistor R2, and to the second end 24. Other configurations could be envisaged, such as for example the use of an insulated gate field effect transistor (or "MOSFET"), with the gate replacing the base, the source the emitter, and the drain the collector.

[0027] As long as transistor V1 is blocking, the first electrical signal at the second end maintains a constant voltage imposed by the working voltage Vcc. When a non-zero voltage VI is established at the first end 22 following the driving of the electrical generator 12, transistor Q1 becomes conducting, connecting the second end 24 to ground via transistor Q1. The second end 24 therefore undergoes a sudden voltage variation, and the first electrical signal has an edge. Preferably, the edge is a falling edge as in the example illustrated but could be a rising edge in another configuration.

[0028] The control block 6 is configured to implement a standby exit of the fluid meter in response to the edge on the first electrical signal INT1 at the second end 24. As illustrated in [Fig.2], starting from an initial state S0, the fluid meter is in standby, and the control block 6 monitors the first electrical signal INT1 to detect an edge therein (step S1). In the absence of an edge on the first electrical signal INT1, the fluid meter remains in the standby state. If an edge on the first electrical signal INT1 is detected, the control block causes the fluid meter to exit standby (step S2). The exit from standby involves the reactivation of functions of the standby meter that were not active during the standby, and in particular the implementation of metrological measurements, but possibly other functions such as data recording.The fluid meter is therefore configured to perform metrological measurements (step S21) in the fluid pipe 2 following the exit from standby. The fluid meter can also be configured to carry out the communication of information relating to the metrological data following the exit from standby.

[0029] The control block 6 controls the return to standby of the fluid meter as a function of the circulation of fluid in the pipe 2, and more precisely the standby is caused by the absence of the circulation of fluid in the pipe 2. Preferably, the return to standby is done on the basis of the results of the metrological measurements. The fluid meter can be configured to return to standby when metrological measurements indicate a zero or insufficient flow rate (typically under a single flow rate) for a first given time T1 (step S22). This first given time T1 is preferably between 1s and 30s, and is for example 5s.

[0030] The fluid meter can be configured to return to standby when the electrical generator 12 is no longer driven by the circulation of the fluid in the fluid pipe 2, for example when a voltage across the terminals of the electrical generator becomes almost zero, below a threshold. In fact, in the absence of circulation of fluid in the pipe 2, the voltage VI at the first end 22 becomes zero again, and the transistor Q1 becomes blocking again. The second end 24 is thus isolated from ground, and returns to a voltage linked to the working voltage Vcc. The first electrical signal INT1 then has an edge, typically rising as here, indicating the absence of fluid circulation. The detection of this edge on the first electrical signal INT1 by the control block 6 can be used to cause the meter to go to standby.

[0031] When the absence of circulation of fluid in the pipe 2 has been noted by the control block 6, the fluid meter goes into standby mode (step S3), and the control block 6 starts monitoring the first electrical signal INT1 again to detect an edge therein (step S1).

[0032] The first electrical circuit 20 makes it possible to limit the metrological measurements to only those times when they are relevant and useful, namely when fluid is circulating in the pipe 2. The first electrical circuit 20 allows the exit from standby as soon as the electric generator 12 is driven by the circulation of the fluid, thus ensuring that any circulation of fluid will be measured. Furthermore, the first electrical circuit 20 does not consume any electricity in standby, unlike systems which, for example, would rely on sensors.

[0033] In order to ensure that a user can exit standby mode at any time, in particular to enable the communication of information relating to metrological data, the fluid meter comprises a second standby exit circuit 30 comprising a control member B1 coupled to the control block S1 by a third end 32. The control member B1 is configured so that its actuation causes an edge on a second electrical signal INT2 at the third end 32. In particular, the control member B1 can keep the second circuit 30 open when it is not actuated, and closes the second circuit 30 when it is actuated. The control member B1 is preferably a pre-positioned switch, the contacts and the operating member of which return to an open position when the operating member is released following a command. For example, the control member B1 can be a push button.The B1 control unit can be part of the human-machine interface mentioned above.

[0034] In the example illustrated, the control member B1 is connected to a working voltage Vcc, via a third resistor R3, and ground, or any other voltage different from the working voltage Vcc. The third end 32 is connected to the control unit B1 and to the third resistor R3. The third resistor R3 can for example have a resistance value between 0.5 and 10 kΩ.

[0035] When a user actuates the control member B1, for example by pressing the push button, the third end 32 becomes connected to ground, and the third end 32 therefore undergoes a sudden voltage variation, and the second electrical signal INT2 has an edge. Preferably, the edge is a falling edge as in the example illustrated but could be a rising edge in another configuration.

[0036] The control block 6 is configured to implement a standby exit of the fluid meter in response to the edge on the second electrical signal at the third end 32. As illustrated in [Fig. 3], starting from an initial state S0, the fluid meter is in standby, and the control block 6 monitors the second electrical signal INT2 to detect an edge therein (step S10). In the absence of an edge on the second electrical signal INT2, the fluid meter remains in the standby state. If an edge on the second electrical signal INT2 is detected, the fluid meter exits standby (step S20).

[0037] The control block 6 is configured to implement a human-machine interface management (step S210) comprising the communication of information relating to said metrological data following the exit from standby of the fluid meter. The communication of the information relating to the metrological data is for example carried out by display on the screen 7 and / or by transmission of the metrological data. Thus, the user, by actuating the control member B1, can access the information relating to the metrological data, and to other possible information, such as for example a meter number. The human-machine interface management can involve input-output peripherals such as for example one or more buttons, with which the user can interact to control the fluid meter. For example, the user can modify the display on the screen 7, typically to navigate between menus or change the data displayed.The user can also modify information relating to metrological data, such as resetting a flow or volume accumulation.

[0038] The fluid meter is configured to return to standby when a human-machine interface standby criterion is met (step S220). Preferably, the standby criterion is based on an interaction with a user. For example, the human-machine interface standby criterion is an absence of actuation of the control member B1 for a second given duration T2. ​​This second given duration T2 is preferably between 1s and 30s, and is for example 5s. If the human-machine interface standby criterion is not met, for example because the control member B1 has been actuated for less than the second duration T2, the fluid meter fluid continues the management of the human-machine interface (step S210). If, on the other hand, the human-machine interface standby criterion is met, for example because the control member B1 has not been actuated for at least the second duration T2, the fluid meter returns to standby (step S30), and interrupts the management of the human-machine interface.

[0039] The fluid meter returns to standby depending on the circulation of fluid in the pipe 2 or rather is caused by the absence of the circulation of fluid in the pipe 2. Preferably, the return to standby is done on the basis of the results of the metrological measurements. The fluid meter can be configured to return to standby when metrological measurements indicate a zero or insufficient flow rate (typically under a single flow rate) for a first given time T (step S22). The fluid meter can be configured to return to standby when the electric generator 12 is no longer driven by the circulation of the fluid in the fluid pipe 2, for example when a voltage at the terminals of the electric generator becomes almost zero, below a threshold.

[0040] Thus, the fluid meter is able to respond immediately to any request from a user actuating the control member B1 without, however, consuming electricity in standby mode to ensure exit from standby.

[0041] The first standby output circuit 20 and the second standby output circuit 30 make it possible to provide a very deep and therefore very energy-efficient standby, being devoid of active components requiring a power supply, and yet allow the fluid meter to perfectly and reactively fulfill its metrological measurement and human-machine interface management functions. The electrical storage element is therefore less stressed and can be chosen with a lower energy storage capacity, with consequently a reduced size and a lower cost, while preserving or increasing its service life.

[0042] The invention is not limited to the embodiment described and shown in the attached figures. Modifications remain possible, in particular from the point of view of the constitution of the various technical characteristics or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

Claims

1. Fluid meter configured to perform metrological measurements in a fluid circulation pipe and to communicate information relating to said metrological data, comprising: - an electric generator (12) configured to be driven by the circulation of the fluid in the fluid pipe (2) and to generate electricity, - at least one metrological sensor (4) configured to perform metrological measurements in the fluid pipe (2), - a control unit (6) configured to receive the metrological measurements and to communicate information relating to said metrological data, characterized in that the fluid meter comprises a first standby output circuit (20) coupled to the electric generator (12) at a first end (22) and to the control unit (6) at a second end (24),the first circuit (20) being configured to generate an edge on a first electrical signal (INT1) at the second end (24) in response to the establishment of a voltage at the first end caused by the driving of the electrical generator (12) by the circulation of the fluid in the pipe (2), the control block being configured to implement a standby output of the fluid meter in response to the edge on the first electrical signal (INT1) at the second end (24).,

2. A fluid meter according to claim 1, wherein the fluid meter is configured to perform metrological measurements in the fluid pipeline (2) following exit from standby, and to return to standby depending on the circulation of fluid in the pipeline (2).

3. Fluid meter according to claim 2, in which the fluid meter is configured to return to standby when metrological measurements indicate a zero flow rate for a first given time or when the electric generator (12) is no longer driven by the circulation of the fluid in the fluid pipe (2).

4. A fluid meter according to any preceding claim, wherein the first circuit (20) comprises a transistor (Ql) configured to turn on in response to the voltage being turned on at the first end (22).

5. Fluid meter according to the preceding claim, wherein the transistor (Ql) has its gate or base connected to the first end (22) and to a first resistor (RI), and is connected to a working voltage (Vcc) by a second resistor (R2), the second end (24) to which the first electrical signal (INT1) is applied being connected between the transistor (Ql) and the second resistor (R2).

6. A fluid meter according to any preceding claim, further comprising a second standby output circuit (30) comprising a controller (B1) coupled to the control block (6) by a third end (32), the controller (B1) being configured so that its actuation causes an edge on a second electrical signal (INT2) at the third end (32), the control block (6) being configured to implement a standby output of the fluid meter in response to the edge on the second electrical signal (INT2) at the third end (32).

7. Fluid meter according to the preceding claim, in which the control block (6) is configured to implement human-machine interface management comprising the communication of information relating to said metrological data following the exit from standby of the fluid meter, the fluid meter being configured to return to standby when a human-machine interface standby criterion is met.

8. Fluid meter according to the preceding claim, in which the human-machine interface standby criterion is an absence of actuation of the control member (Bl) for a given second time.

9. Fluid meter according to any one of the preceding claims, wherein the communication of information relating to the metrological data is carried out by display on a screen (7) and / or by transmission of said metrological data.

10. A fluid meter according to any preceding claim, wherein the edge is a falling edge.

11. Method for managing the standby of a fluid meter configured to carry out metrological measurements in a fluid circulation pipe and to communicate information relating to said metrological data according to any one of the preceding claims, the method comprising: - during a standby of the fluid meter during which a sensor metrological (4) configured to perform metrological measurements in the fluid pipe (2) does not perform metrological measurements, monitoring (SI) by a control block (6) of the occurrence of an edge on a first electrical signal (INT1) at a second end (24) of a first standby output circuit (20) coupled at a first end (22) to an electrical generator (12) configured to be driven by the circulation of the fluid in the fluid pipe (2) and generate electricity, - following the detection by the control block (6) of an edge on the first electrical signal (INT1) at the second end (24), the implementation by the control block (6) of a standby output (S2) of the fluid meter in response to the edge on the first electrical signal (INT1) at the second end (24), and - the control block (6) causes the fluid meter to go into standby (S3) depending on the circulation of fluid in the pipe (2).

12. Method according to claim 11, in which the control block (6): - monitors (S 10) during a standby of the fluid meter the occurrence of an edge on a second electrical signal (INT2) at a third end (32) of a second standby exit circuit (30), - implements a standby exit of the fluid meter in response to an edge on the second electrical signal (INT2) at the third end (32), - implements a human-machine interface management (S210) comprising the communication of information relating to said metrological data following the exit from standby of the fluid meter, - causes the fluid meter to go into standby (S30) when a human-machine interface standby criterion is met.

13. A computer-readable computer program product comprising instructions which, when the program is executed by a control block (6) of a fluid meter according to any one of claims 1 to 10, cause said control block (6) to implement the steps of the method according to one of claims 11 or 12.

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