METHOD AND SYSTEM FOR TRANSMITTING DATA RELIABLY

• US 20200136794A1
• Filed: 10/29/2019
• Published: 04/30/2020
• Est. Priority Date: 10/31/2018
• Status: Active Grant

• Current Assignee: Thales SA
• Original Assignee: Thales SA
• Inventors: ANDRADE ALFONSECA, Damian, TEIXEIRA, Tony, GUGUEN, Stephane
• Granted Patent: US 10,862,665 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 13/42 Bus transfer protocol, e.g. handshake; Synchronisation
• CPC Class Codes: H02P 27/06 using dc to ac converters or inverters H02P27/05 takes precedence
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 7/0008 Synchronisation information channels, e.g. clock distribution lines
• CPC Class Codes: H04L 7/0087 Preprocessing of received signal for synchronisation, e.g. by code conversion, pulse generation or edge detection
• CPC Class Codes: H04L 7/048 using the properties of error detecting or error correcting codes, e.g. parity as synchronisation signal

Abstract

A method and device for transmitting data reliably to at least one item of equipment is provided, wherein: from its initial clock H₁, an item of equipment generates at least one first clock H_1U from a rising edge of the initial clock H₁ with a frequency F_1U and a second clock H_1D from a falling edge of the initial clock H₁, with a frequency F_1D, the item of equipment: reads the received data using at least one first rising edge of H_1U and one falling edge consecutive to the first rising edge of H_1U, then reads the received data using a first rising edge of H_1D and a falling edge consecutive to the first rising edge of H_1D, the four clock edges used being consecutive by 2F₁, decodes at least the four messages using an error-correcting code, when at least one decoded message is correct, it uses the information contained in this message to drive a device linked to said item of equipment.

Claims

1. A method for transmitting data reliably to at least one item of equipment provided with an initial clock H₁ in a system comprising at least one message-transmitting device working with a first clock H₀, wherein it comprises at least the following steps:

from its initial clock H₁, at an initial frequency F₁, an item of equipment generates at least one first clock H_1U from a rising edge of the initial clock H₁ with a frequency F_1U and a second clock H_1D from a falling edge of the initial clock H₁, with a frequency F_1D,

the item of equipment then executes the following steps;

reading the received data using the first clock H_1U at a frequency F_1U and the second clock H_1D at a frequency F_1D and using at least one first rising edge of the first clock H_1U followed by a falling edge consecutive to the first rising edge of the generated first clock H_1U, then a first rising edge of the second clock H_1D followed by a falling edge consecutive to the first rising edge of the generated second clock H_1D, the four clock edges used being consecutive,

decoding at least the four messages using an error-correcting code, when at least one message is decoded correctly, using the information contained in this message to drive a device linked to said one or more items of equipment.

2. The method according to claim 1, wherein the data are communicated using a communication protocol implementing a correction of CRC error-correcting-code type.

3. The method according to claim 1, wherein the values of the frequencies are defined in the following way:

4. The method according to claim 1, wherein the items of equipment are inverters delivering power to a rotating machine.

5. A system for transmitting data reliably to at least one item of equipment configured to drive a device, the system comprising a device having a clock H₀ operating at a frequency F₀ wherein an item of equipment comprises at least the following elements:

a clock-generating module configured to generate, from the initial clock H₁ of the item of equipment, at an initial frequency F₁, at least one first clock H_1U from a rising edge of the initial clock H₁, with a frequency F_1U, and one second clock H_1D from a falling edge of the initial clock H₁, with a frequency F_1D,

a data-processing module configured to;

read the received data using at least a first rising edge of the first clock H_1U and a falling edge consecutive to the first rising edge of the generated first clock H_1U, then read the received data using a first rising edge of the second clock H_1D and a falling edge consecutive to the first rising edge of the generated second clock H_1U, the four clock edges used being consecutive by 2F₁, and decode at least the four messages using an error-correcting code,

if the verification of at least one message with the error-correcting code is correct, use the information contained in the message to generate a drive signal for a device linked to said one or more items of equipment.

6. The system according to claim 5, wherein the data-transmitting device is configured to use a communication protocol having a CRC error corrector.

7. The system according to claim 5, wherein the data-transmitting device is linked to a plurality of inverters configured to generate power and to deliver said power to a rotating machine.