FR3083360A1 - METHOD FOR REMOTE CONSUMPTION OF A RESOURCE, AND ASSOCIATED DEVICE - Google Patents

Abstract

The invention relates to a method and a device for remote reading of a consumption of a resource, for example water, electricity or gas, consumption materialized in the form of a train of pulses, each pulse corresponding to the consumption of one unit of the resource. According to the invention: • ET10: awakened at each reception of a pulse, a master circuit (20) time stamp (ET102) the pulse, stores the time stamp (ET102) then goes out (ET109), the successive time stamps being stored in the form of a train of timestamps, • ET30: woken up on each reception of a transfer instruction produced by the master circuit, a slave circuit (40) transfers the train of timestamps to a remote server (ET302) then goes out (ET309). Application to real-time monitoring of resource consumption.

Description

Technical field and state of the art

The invention relates to a method and a device for remote reading of the instantaneous consumption of a resource, for example water, electricity, gas, etc., consumption materialized in the form of a train. pulses, each pulse corresponding to a consumption of one resource unit. Such remote reading methods and devices are generally used by resource supply network managers, in order to account for the consumption of each consumer.

Such a remote reading device is coupled to a measurement sensor, capable of measuring consumed resource units and of producing a corresponding pulse train. In one example, a sensor is positioned on a water pipe supplying a building, a private residence, ..., and produces an impulse each time a liter of water transits inside the pipe.

Known remote reading devices generally include a counting circuit, configured to increment an index each time it receives a pulse, and to transmit the value of the index occasionally to a server remote from the network manager. These devices are generally supplied with electricity by a battery. As the index transfer is occasional, for example a

times a day, indeed once a month, and that an index East materialized by a given digital of small volume, these devices Telereport easily a autonomy of a few years

Network operators (including consumers) today wish to have a

CONVI5-FR-1_TEXTE DEPOE_GB / SO / AG more complete and precise information on the consumption of the resource, and in particular wish to have real-time information on each resource unit consumed in order to better manage the consumption of the resource on a daily basis. Such detailed information in itself represents a larger volume of data than a simple index. If, in addition, this information must be transmitted in real time, up to many times per minute during consumption peaks, the known remote reading devices see their autonomy drop sharply, to such an extent that it would be necessary to replace the battery after a few days or at best a few months, which is not possible for a network manager. The obvious solution of using a larger capacity battery is also not acceptable, for obvious considerations of cost and size.

The invention aims to provide a new real-time remote reading solution, which in particular is reasonably consuming electrical energy, while providing information on the real-time consumption of the resource.

Description of the invention

The invention proposes a new method for remote reading of a consumption of a resource, for example water, electricity or gas, consumption materialized in the form of a train of pulses, each pulse corresponding to the consumption of one unit of the resource, a process during which:

• ET10: awakened at each reception of a pulse, a master circuit (20) time stamp (ET102) the pulse I (t) and memorizes the time stamp HI (t) (ET102), then turns off (ET109), the successive timestamps being stored in the form of a train of timestamps, • ET30: woken up each time an instruction is received

CONVI5-FR-1_TEXTE DEPOE_GB / SO / AG transfer produced by the master circuit, a slave circuit (40) transfers the train of timestamps to a remote server (ET302) then turns off (ET309).

For the implementation of this new method, the invention also proposes a new electronic device comprising:

• a master circuit (20) configured to, on each reception of a pulse, time stamp the pulse I (t), memorize the time stamp HI (t) then turn off, the successive time stamps being stored in the form of a train of time stamps, • a slave circuit (40) configured to, on each reception of a transfer instruction from the master circuit, transfer the train of time stamps to a remote server then shut down.

The invention thus proposes to time stamp each pulse I (t) and to memorize each corresponding time stamp HI (t), which makes it possible to have information on the instantaneous consumption. The invention proposes, on the other hand, to transmit the time stamps to the remote server not in real time but only at predefined time intervals, which makes it possible to limit the overall consumption of the remote reading device. For implementing the method, the invention provides a remote reading device comprising a master circuit and a slave circuit. The main function of the master circuit is the real-time time stamping of the pulses relating to the consumption of the resource, and the control of the slave circuit for the transfer of time stamps to the remote server at predefined time intervals. These two functions consume little energy in practice. However, in order to limit its energy consumption, the master circuit is voluntarily switched off after each time stamp (ET109). The slave circuit has for its main function the transfer of timestamps to the server

CONVI5-FR-1_TEXTE DEPOE_GB / SO / AG remote on request from the master circuit, in particular at regular time intervals, for example every minute, every hour, every day, .... Outside the transfer steps of given to the remote server, the slave circuit is voluntarily switched off (ET309) so that it does not consume energy. The information transmitted to the remote server is a series (or train) of timestamps, information much more complete than a simple index, since it makes it possible to precisely determine at what times and at what instantaneous rates the resource is consumed. The overall consumption of the remote reading device according to the invention remains reasonable, however, since the slave circuit, the largest consumer of energy, is in operation only occasionally.

It is said here, and more generally throughout this description, that the master circuit is switched off when most of its electronic circuits no longer receive electrical power, the only one possibly remaining on standby a circuit configured to receive the pulses to be time-stamped. Similarly, it is said that the slave circuit is extinguished when most of its electronic circuits no longer receive electrical power, the only one possibly remaining in standby mode a circuit configured to detect an instruction on the bus. Similarly, it is said that the master circuit (or the slave circuit) wakes up when its electronic circuits are supplied again electrically, the supply of electric power causing the start-up of each electronic circuit.

According to one embodiment, the circuit according to the invention comprises a timing circuit configured to measure a predefined time TIME and produce a timeout end signal TIMEOUT, and the master circuit produces (ET20) a transfer instruction each time it receives the TIMEOUT timeout signal (ET202-203). It is

CONVI5-FR-1_TEXTE DEPOE_GB / SO / AG thus possible to choose and / or modify the frequency of the pulse train transfers to the remote server.

According to one embodiment, on each reception of a pulse (ET10), the master circuit also checks a plurality of alert thresholds relating to abnormal consumption of the resource and produces a transfer instruction if at least one threshold of alert is reached (ET104 to 106). The method according to the invention thus makes it possible to detect in real time an abnormal consumption of resource, and to inform the remote server of it in real time, without waiting for a time-out signal.

Preferably, after transfer of a train of timestamps to the remote server, the slave circuit receives from the server a set of parameters comprising in particular updated alert thresholds, and transfers the said set of parameters to the master circuit.

This step can allow the updating of the parameters of the master circuit and / or of the timing circuit, in particular the alert thresholds and the spacing between two data transfers to the remote server, without any physical intervention on the device. is required. This step can also allow updating of the communication protocols between the master circuit and the slave circuit and / or between the slave circuit and the remote server. This step can finally make it possible to synchronize the clock of the timing circuit with a clock signal supplied by the remote server. This updating step also makes it possible to increase the lifetime of the remote reading device according to the invention by providing it with a faculty of adaptation to its environment which makes it more energy efficient while maintaining a level of constant performance.

Brief description of the figures

CONVI5-FR-1_TEXT DEPOE_GB / SO / AG

The invention will be better understood, and other characteristics and advantages of the invention will appear in the light of the following description of examples of method and device according to the invention. These examples are given without limitation. The description should be read in conjunction with the accompanying drawings in which:

• Figure 1 shows an exemplary embodiment of a remote reading device according to the invention, and • Figure 2 shows the steps of an example of a method according to the invention.

In the figures, the circuits and process steps essential to the invention are shown diagrammatically in solid lines. The optional circuits and process steps are shown in dotted lines. They represent interesting improvements of the invention, but are not essential to the essential idea of the invention. Also in FIG. 1, an arrow in thick lines represents a transfer of data, and an arrow in thin lines represents a transfer of instruction.

Description of an embodiment of the invention

As said previously, a remote reading device according to the invention essentially comprises:

• a master circuit (20) configured to, on each reception of a pulse, time stamp the pulse I (t), memorize the time stamp HI (t) then turn off, the successive time stamps being stored in the form of a train of time stamps, • a slave circuit (40) configured to, on each reception of a transfer instruction from the master circuit, transfer the train of time stamps to a remote server then shut down.

In the practical embodiment shown in the figures, the remote reading device also includes a

CONVI5-FR-1_TEXTE DEPOE_GB / SO / AG timer circuit 10 and a bus 60 for information exchange (instructions or data) connecting the master circuit 20 and the slave circuit 40. The remote reading device receives pulses I (t ) a measurement sensor (not shown in fig. 1) of the resource consumption, and regularly transmits to a remote server (not shown in fig. 1) information on the instantaneous consumption of the resource.

The timer circuit 10 is configured to measure a preset time TIME and produce a timeout TIMEOUT signal when the preset time is reached. The timing circuit is implemented in a manner known per se by a clock connected to a pulse counter; the clock produces a pulse at each time unit, the pulse counter is incremented with each pulse of the clock and produces the end of time signal when it has counted a predefined number of pulses. In one example, the preset time TIME is of the order of a few minutes to several tens of minutes, for example of the order of 5 minutes.

According to the embodiment shown in FIG. 1, the master circuit 20 comprises a time stamping circuit 21, a data memory 22 and a control circuit 23. The time stamping circuit is in one example a clock circuit configured to produce a time stamp HI (t), that is to say a data item comprising a date and a time, each time it receives a pulse I (t) corresponding to a consumption of a resource unit. The data memory 22 is a memory making it possible to store and preserve data even when it is not supplied with electric current, it is however erasable and rewritable, for example of EPROM, EEPROM type, ... The storage capacity memory should preferably be sufficient to store information relating to an average consumption of the

CONVI5-FR-1_TEXTE DEPOE_GB / SO / AG resource for at least a few minutes. Average consumption may depend in particular on the number of consumers and their consumption habits. For purely indicative purposes, the memory capacity can be chosen to store a few tens to a few hundred timestamps.

The control circuit 23 is configured to, when it receives a timeout end of TIMEOUT signal, send a transfer instruction on the bus 60 and transfer the train of time stamps HI (t) stored in the memory 22 to the bus. To this end, the control circuit 23 sends the transfer instruction to the memory 22 which transfers the data it contains on the bus 60 to the slave circuit 40. The master circuit 20 is also configured to switch off after receipt on the bus of a transfer confirmation sent by the slave circuit. For this, the control circuit is configured to cut off the electrical supply to the time stamping circuit and to the memory, more generally from any electronic circuit of the master circuit.

The slave circuit 40 is configured for, when it detects a transfer instruction on the bus, transfer the train of time stamps present on the bus to a remote server, send a transfer confirmation on the bus to the circuit master then go out. To this end, the slave circuit 40 notably comprises an interface for connection 41 to the remote server, for example by a wireless link such as a WIFI link, a link via a cellular network, etc. or by a wired link such as '' an ADSL link or a fiber optic link. The slave circuit also includes a control circuit 42 configured to detect the transfer instructions present on the bus 60, and control the connection interface 41 to perform the data transfer according to a communication protocol known per se. The slave circuit can also include a data storage memory 43,

CONVI5-FR-1_TEXTE DEPOE_GB / SO / AG preferably of erasable and rewritable ROM type, to temporarily store data.

The communication protocols between the circuits connected via the data bus 60 as well as the communication protocols between the connection interface 41 and the remote server are not detailed here. They are essentially based on a succession of information transfer steps (instructions or data) each followed by an information acknowledgment step; these protocols are widely known elsewhere.

In the remote reading device according to FIG. 1, the master circuit also comprises a calculation circuit 24 configured to calculate a time D (t) elapsed between the time stamp HI (t) of the pulse I (t) and a time stamp Hl (tl) of the previous pulse I (tl), the data memory 23 being configured to memorize the elapsed time D (t) calculated simultaneously with the corresponding time stamp HI (t), here being a variable identifying the rank d 'an impulse, a timestamp. In a practical embodiment, the calculation circuit is a subtractor with two inputs and an output, a first input being connected to the output of the time stamping circuit, a second input being connected to the output of the subtractor and the output of the subtractor being connected to a data input of the memory 22, the subtractor being clocked by the pulse signal.

Also in the device of FIG. 1, the master circuit comprises an alert circuit 25 configured to check a plurality of alert thresholds relating to abnormal consumption of the resource and to provide an alert signal to the control circuit if at less an alert threshold is reached, the control circuit 23 being configured to, when it receives an alert signal, send a transfer instruction on the bus 60 and transfer the train of time stamps HI (t ) stored in memory 22, then

CONVI5-FR-1_TEXTE DEPOE_GB / SO / AG switch off the master circuit after reception on the bus of a transfer confirmation sent by the slave circuit.

A first alert threshold is for example reached if a sum of the last n times D (t) elapsed is less than a first minimum value Dlmin (n, h), n being an integer greater than or equal to 1. It is recalled that an elapsed time D (t) corresponds to the time elapsed during the consumption of a resource unit, an elapsed time D (t) is thus inversely proportional to the instantaneous flow of the resource; the sum of the last n times D (t) elapsed corresponds to the total time elapsed for the consumption of n resource units and thus gives an indication of the average throughput for the consumption of n resource units; If this average flow rate is greater than a predefined value, that is to say if the average time elapsed for the consumption of a resource unit is less than the first predefined minimum value Dlmin (n, h), then we consider that the consumption is abnormal and an alert is given. As a variant, the first alert threshold can be checked for several values of n, for example n = 1, n = 100, ...

A threshold Dlmin (n, h) for n large, for example for n between 50 and 300 (corresponding to the consumption of 50 to 300 units of resources) allows, by averaging the elapsed times D (t) to take account of a time lag of a use of the resource. For example, if a shower usually taken at 8 p.m. is a particular day postponed to 8:15 p.m., a calculation of the average elapsed time over the period 7:45 p.m. to 8:45 p.m. makes it possible to not unnecessarily alert when a pulse is time stamped at 8:30 p.m., the time at which the shower is usually over.

The particular case of a threshold Dlmin (l, h) with n = 1 corresponds to an elapsed time less than a minimum value, that is to say to an instantaneous flow rate greater than an expected maximum value, which can signify a presence abnormal

CONVI5-FR-1_TEXTE DEPOE_GB / SO / AG of a person at the place of consumption, or a rupture of a water or gas pipe, a rupture of an electric cable, ...

A second alert threshold is for example reached if each of the last m times D (t) elapsed is individually less than a second minimum value D2min (m, h), m being an integer greater than or equal to 1. A threshold D2min (m, h) for m small, for example for m between 5 and 50 (corresponding to the consumption of 5 to 50 units of resources) makes it possible to detect consumption which can be linked to leaks of greater or lesser amplitude over a pipe.

The minimum values Dlmin (n, h) and D2min (m, h) can depend on an associated time stamp h (date + time). Thus, the alert thresholds can be different depending on the time of day, the day of the week, the week of the month,

In a practical embodiment given solely by way of example, the alert circuit 25 can comprise, for monitoring the first alert threshold, a shift register with n memory boxes, a summator, a comparator and a memory of data. The shift register comprises a serial input connected to the output of the calculation device and n parallel outputs each corresponding to an output of the n memory boxes, the n parallel outputs of the register being connected to n inputs of the adder; the register is clocked by the pulses I (t). An output of the adder is connected to a first positive input of the comparator and a minimum value Dlmin (n, h) is applied to a second negative input of the comparator; the alert signal is available on the comparator output; it is positive if the sum of the last n times D (t) elapsed is less than a minimum value Dlmin (n, h). The minimum values Dlmin (h, t) are stored in the data memory of the warning circuit.

CONVI5-FR-1_TEXT DEPOE_GB / SO / AG

The time stamping circuit 21, the calculation circuit 24, the alert circuit 25 and the control circuit 23 of the master circuit are in practice elements of a first part of a microprocessor MP preferably chosen for its low consumption energy. This first part of the microprocessor is voluntarily shut down as soon as possible to limit energy consumption. The data memory 23 of the master circuit is chosen to be small and is also voluntarily switched off as soon as possible to also limit its consumption. The timing circuit is an element of a second part of the microprocessor, which always remains supplied with electrical energy to keep the clock active.

The transfer interface 41 and the control circuit 42 of the slave circuit are for their part elements of a second ESP microprocessor preferably chosen for its performance in terms of speed of execution of the instructions, to the detriment of its energy consumption. Such performance is necessary to be able to transfer large volumes of data to a remote server via a wireless or even wired link. The slave circuit is in practice active for very short times and much less often than the master circuit. The slave circuit is voluntarily shut down as soon as possible to limit its energy consumption. The memory 43 of the slave circuit can be of large capacity; as it is in practice supplied only for short periods, its overall consumption remains low. The memory 43 can be used for example to temporarily store data coming from the data memory 22 while waiting for a next transfer to the remote server.

The circuit of the figure can be used for the

CONVI5-FR-1_TEXTE DEPOE_GB / SO / AG preferred implementation of a method according to the invention which will be described below, in relation to FIG. 2.

As said previously, during a process according to the invention:

• ET10: awakened at each reception of a pulse, a master circuit (20) time stamp (ET102) the pulse I (t), memorizes the time stamp HI (t) (ET102) then goes out (ET109), the successive timestamps being stored in the form of a timestamp train, • ET30: awakened on each reception of a transfer instruction produced by the master circuit, a slave circuit (40) transfers the timestamp train to a remote server ( ET302) then goes out (ET309).

According to the detailed embodiment of FIG. 2, the method comprises the following steps, executed by the master circuit 20 awakened on each reception (ET10) of a pulse I (t):

• ET102: the time stamping circuit 21 time stamps the pulse I (t) that it receives and the data memory 22 stores the time stamp HI (t) obtained, • ET109: the master circuit switches off.

In parallel, the timing circuit 10 measures a predefined time TIME; it produces a TIMEOUT timeout signal when the preset time is reached.

Each time it receives an end of delay signal, the master circuit produces a transfer instruction. For this, in a practical embodiment, when it receives the timeout end timeout signal (ET20), the master circuit 20 wakes up and performs the following steps:

• ET202: the control circuit 23 sends a transfer instruction to a bus 60 and to the memory 22, • ET203: the memory 22 transfers the stored time stamps HI (t) to the bus, and

CONVI5-FR-1_TEXT DEPOE_GB / SO / AG • ET205: the master circuit 20 switches off after reception on the bus of a transfer confirmation sent by the slave circuit 40.

Finally, when it receives a transfer instruction (ET30) present on the bus, the slave circuit wakes up and performs the following steps:

• ET302: the control circuit 42 transfers the time stamps present on the bus to a remote server via the connection interface 41, • ET305: after reception of information from the server indicating that the transfer has been correctly carried out , the control circuit 42 sends a transfer confirmation on the bus to the master circuit, and • ET309: the slave circuit goes out.

It is said here, and more generally throughout this description, that the master circuit switches off when its control circuit cuts off the electrical supply to all of its other circuits (time stamping circuit 21, memory 22, calculation circuit 24, alert circuit 25, etc.) after each circuit has fallen asleep or stopped according to usual protocols known elsewhere, the control circuit remaining in standby, awaiting a pulse. Similarly, it is said that the slave circuit goes out when its control circuit 42 cuts off the electrical supply to all of its other circuits (connection interface 41, memory 43, ...) after each circuit has fallen asleep or stopped, the control circuit remaining on standby awaiting a transfer instruction on the bus. Similarly, we say that the master circuit (or slave circuit) wakes up when its control circuit again supplies electrical power to all the other circuits of the master circuit (or slave circuit), supplying electrical power causing each circuit to be woken up according to known usual start-up protocols

CONVI5-FR-1_TEXTE DEPOE_GB / SO / AG otherwise.

In the example of FIG. 2 again, between the time stamping step ET102 of a pulse I (t) and the step of memorizing the associated time stamp, the calculation circuit 24 (ET103) calculates a time D (t) elapsed between the time stamp of the pulse I (t) and the time stamp Hl (tl) of the previous pulse I (tl) and the memory 22 stores the calculated elapsed time D (t) associated with the time stamp HI (t).

Each time a pulse is received (ET10), the master circuit can also check a plurality of alert thresholds relating to abnormal consumption of the resource and produces a transfer instruction if at least one alert threshold is reached (ET104 to 106). In the example of Figures 1-2, this is done as follows: after the time stamp ET102 of a pulse I (t), the alert circuit 24 checks (ET104) a plurality of relative alert thresholds abnormal consumption of the resource, then:

• ET105: if at least one alert threshold is reached,

ET105a: the alert circuit 24 transmits an alert signal to the control circuit 23 which sends a transfer instruction on the bus and to the memory 22,> ET105b: 1 to memory 22 transfers the time stamps HI (t ) that it memorizes, and

ET105c: the master circuit switches off after reception on the bus of a transfer confirmation sent by the slave circuit, • ET106: otherwise, if no alert threshold is reached, switch off the master circuit.

After the time stamp and the storage of a time stamp (ET102), if the memory 22 is full, specific steps can be carried out. To this end, the memory 22 sends a full memory signal to the control circuit 23 and the following steps are carried out (ET107):

CONVI5-FR-1_TEXT DEPOE_GB / SO / AG

ET107a: the control circuit 23 sends a storage instruction on the bus and to the memory 22,> ET107b: 1 a memory 22 transfers the stored time stamps HI (t) to the bus, and

ET107c: the master circuit switches off after reception on the bus of a storage confirmation sent by the slave circuit

Then, each time a storage instruction is received

present on the bus (ET307), the slave circuit performs the following steps : • ET307a: the circuit of command 42 transfers the

Time stamps present on the bus in the storage memory 43, • ET307b: the control circuit 42 sends a storage confirmation on the bus to the master circuit 20, and • ET307c: the slave circuit goes out.

And finally, during a following step ET302, the slave circuit 20 transfers the timestamps stored in the storage memory and the timestamps present on the bus to the remote server.

These steps make it possible to temporarily unload the data memory of the master circuit into the storage memory of the slave circuit, while waiting for a next data transfer to the remote server. These steps thus allow all timestamps to be kept without using a large memory in the master circuit. This makes it possible not to use a large capacity memory in the master circuit, including for applications where data transfers to the remote server are envisaged only at long or very long time intervals, of the order of a few hours a few days. The overall consumption of the remote reading device is thus still limited.

CONVI5-FR-1_TEXT DEPOE_GB / SO / AG

Also, the method according to the invention can be improved by a step of updating the parameters of the remote reading device: after transfer of a train of timestamps to the remote server, the slave circuit receives from the server a set of parameters comprising in particular updated alert thresholds, and transfers the said set of parameters to the master circuit. According to the embodiment of FIGS. 1-2, the updating step can comprise the following steps, carried out after the completion of an ET302 transfer step:

ET303: the control circuit 42 of the slave circuit receives from the server a set of parameter values via the interface 41, the said set comprising in particular parameter values used by the master circuit, in particular the parameters Dlmin ( n, h) or D2min (m, h), • ET304: the control circuit 42 sends the said set of parameter values on the bus to the master circuit.

The method according to the invention can also be advantageously supplemented by a reinitialization of the data memory 22 of the master circuit and / or of the data memory 43 of the slave circuit. To this end, step ET107c can be completed as follows:

• ET107c: after receipt on the bus of a storage confirmation sent by the slave circuit, initialize the data memory of the master circuit then switch off the master circuit.

Step ET205 can be completed as follows:

• ET205: after reception on the bus of a transfer confirmation sent by the slave circuit, initialize the data memory of the master circuit then switch off the master circuit and / or step ET307c can be completed as follows:

CONVI5-FR-1_TEXTE DEPOE_GB / SO / AG • ET305: initialize the data memory of the slave circuit and send a transfer confirmation on the bus to the master circuit

CONVI5-FR-1_TEXT DEPOE_GB / SO / AG

NOMENCLATURE

Remote reading device comprising:

timing circuit

20 master circuit including:

21 circuit of timestamp 22 memory of data 23 circuit of ordered 24 circuit of calculation 10 25 circuit of alert

slave circuit comprising:

connection interface control circuit data memory

60 information transfer buses

CONVI5-FR-1_TEXT DEPOE_GB / SO / AG

Claims (16)

1. Method for remote reading of a consumption of a resource, for example water, electricity or gas, consumption materialized in the form of a train of pulses, each pulse corresponding to the consumption of a resource unit, a process in which: • ET10: awakened on each reception of a pulse, a master circuit (20) time stamp (ET102) the pulse I (t), memorizes the time stamp HI (t) (ET102) then goes out (ET109), the successive timestamps being stored in the form of a timestamp train, • ET30: awakened on each reception of a transfer instruction produced by the master circuit, a slave circuit (40) transfers the timestamp train to a remote server ( ET302) then goes out (ET309). 2. Method according to claim 1 in which (ET20) the master circuit produces a transfer instruction each time it receives a timeout end timeout signal (ET202-203). 3. Method according to one of claims 1 to 2 wherein, on each reception of a pulse (ET10), the master circuit also checks a plurality of alert thresholds relating to an abnormal consumption of the resource and produces an instruction transfer if at least one alert threshold is reached (ET104 to 106). 4. Method according to claim 3 in which, after transfer of a train of timestamps to the remote server, the slave circuit receives from the server a set of parameters comprising in particular updated alert thresholds, and CONVI5-FR-1_TEXTE DEPOE_GB / SO / AG transfers the said set of parameters to the master circuit. 5. Method according to one of claims 2 to 4 wherein step ET10 comprises the following steps consisting in: • ET102: time stamp the pulse I (t) received and store the time stamp HI (t) obtained in a data memory, • ET109: switch off the master circuit, in which step ET20 comprises the following steps consisting in: • ET202: send a transfer instruction on a bus (60) for exchanging information connected between the master circuit and a slave circuit (40), • ET203: transfer the memorized HI (t) timestamps to the bus, and • ET205: switch off the master circuit after reception on the bus of a transfer confirmation sent by the slave circuit, and in which step ET30 comprises the following steps, consisting in: • ET302: transfer the time stamps present on the bus to a remote server, • ET305: send a transfer confirmation on the bus to the master circuit, and • ET309: turn off the slave circuit. 6. Method according to claim 5, also comprising a step of calculation ET103, executed between the step of time stamping ET102 of a pulse I (t) and the step of memorizing the associated time stamp, step of calculation ET103 consisting calculating a time D (t) elapsed between the time stamp of the pulse I (t) and a time stamp Hl (tl) of a previous pulse I (tl) and memorizing the calculated elapsed time D (t) associated with l 'time stamp HI (t). CONVI5-FR-1_TEXT DEPOE_GB / SO / AG 7. The method as claimed in claim 5 or 6, also comprising the following steps, carried out each time an I (t) pulse is received and after the ET102 time stamp of said I (t) pulse: • ET104: check a plurality of alert thresholds relating to abnormal consumption of the resource and • ET105: if at least one alert threshold is reached, ET105a: send a transfer instruction on the bus, ET105b: transfer the stored HI (t) timestamps to the bus, and ET105c: switch off the master circuit after reception on the bus of a transfer confirmation sent by the slave circuit, • ET106: otherwise, if no alert threshold is reached, switch off the master circuit. 8. The method as claimed in claim 7, in which a first alert threshold is reached if a sum of the last n times D (t) elapsed is less than a first minimum value Dlmin (n, h), n being a greater whole number. or equal to 1. 9. Method according to one of claims 7 or 8, in which a second alert threshold is reached if each of the last m times D (t) elapsed is less than a second minimum value D2min (m, h), m being an integer greater than or equal to 1. 10. Method according to one of claims 8 or 9, in which the first minimum value Dl min (n, h) and / or the second minimum value D2min (m, h) is / are a function of a time stamp h (date + time) associated. CONVI5-FR-1_TEXT DEPOE_GB / SO / AG 11. Method according to one of claims 5 to 10, also comprising the following steps, executed by the circuit master when Memory East full (ET107): > ET107a: send a instruction storage on the bus, > ET107b: to transfer sure the bus time stamps HI (t) stored, and > ET107c: switch off the circuit master after reception on the bus of a storage confirmation sent by the slave circuit, also comprising the following steps, executed by the slave circuit on each reception of a storage instruction present on the bus (ET307): • ET307a: transfer the time stamps present on the bus to the storage memory, • ET307b: send a storage confirmation on the bus to the master circuit, and • ET307c: switch off the slave circuit. and in which, during a following step ET302, the slave circuit transfers the timestamps stored in the storage memory and the timestamps present on the bus to the remote server. 12. Method according to one of the preceding claims, in which, during step ET205, the data memory of the master circuit is reset before the master circuit goes out. 13. Device for remote reading of a consumption of a resource, for example water, electricity or gas, consumption materialized in the form of a train of pulses, each pulse corresponding to the consumption of a resource unit, a device suitable for implementing a process according to one of the CONVI5-FR-1_TEXT DEPOE_GB / SO / AG 2 4 previous claims, electronic device comprising: • a master circuit (20) configured to, on each reception of a pulse, time stamp the pulse I (t), memorize the time stamp HI (t) then turn off, the successive time stamps being stored in the form of a train of time stamps, • a slave circuit (40) configured to, on each reception of a transfer instruction from the master circuit, transfer the train of time stamps to a remote server then shut down. 14. Device according to claim 13 in which the master circuit (20) and the slave circuit (40) are connected by a bus (60) for exchanging information, in which the master circuit comprises: • a time stamping circuit (21) configured to produce a time stamp HI (t) on each reception of a pulse I (t) corresponding to a consumption of a resource unit, • a data memory (22) configured for memorize the timestamps produced by the timestamping circuit, and • a control circuit (23) configured to, when it receives a timeout signal, send a transfer instruction on the bus and transfer the train to the bus 'HI time stamps (t) memorized in the memory, then to switch off the master circuit after reception on the bus of a transfer confirmation sent by the slave circuit, and in which the slave circuit (40) is configured for, when detects a transfer instruction on the bus, transfer the train of time stamps present on the bus to a remote server, send a transfer confirmation on the bus to the master circuit then shut down. CONVI5-FR-1_TEXT DEPOE_GB / SO / AG 15. Device according to claim 14 wherein the master circuit also comprises a calculation circuit (24) configured to calculate a time D (t) elapsed between the time stamp HI (t) of the pulse I (t) and a time stamp Hl (tl) of the previous pulse I (tl), the data memory being configured to store the elapsed time D (t) calculated simultaneously with the corresponding time stamp HI (t). 16. Device according to claim 15, in which the master circuit also comprises an alert circuit (25) configured to check a plurality of alert thresholds relating to abnormal consumption of the resource and supply an alert signal to the controls if at least one alert threshold is reached, the control circuit being configured to, when it receives an alert signal, send a transfer instruction on the bus and transfer the train of time stamps HI ( t) memorized in the memory, then to switch off the master circuit after reception on the bus of a transfer confirmation sent by the slave circuit.