Software upgrading system of two-wire system capacitor vehicle door handle

Abstract

The invention relates to a software upgrading system of a two-wire system capacitor vehicle door handle. The software upgrading system comprises a first coding circuit, a first decoding circuit and an updating unit which are arranged on the vehicle door handle, the decoding module comprises a second coding circuit, a second decoding circuit and a second communication circuit; the upper computer comprises a first communication circuit; the first encoding circuit and the second decoding circuit are connected through the same power line, and the first decoding circuit and the second encoding circuit are connected through the same power line. The upper computer issues upgrading data to the handlebar through the decoding module and the power line, the handlebar decodes the coded upgrading data sent by the decoding module, after upgrading is completed, reply data is coded and then sent to the decoding module through the power line, and the decoding module decodes the reply data and then uploads the reply data to the upper computer. When the upper computer does not receive the reply of the vehicle door handle, the upper computer does not send data to the vehicle door handle any more, two-way communication between the vehicle door handle and the upper computer is achieved through multiplexing of the power line, and program upgrading of the two-wire system capacitor vehicle door handle is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle door control and provides a software upgrade system for a two-wire capacitance vehicle door handle. Background Art

[0002] Traditional capacitive door handles generally include two power lines and one or two signal output lines. If the signal line uses Lin signal output, the Bootloader function can be realized through the Lin communication protocol. The two-wire capacitive door handle outputs by modulating the output signal onto the power line, so only two wire harnesses are required. Since the additional output line is reduced, the installation cost is lower.

[0003] Since there are only two power lines, it is basically difficult to design the Bootloader function. In addition, the door handle requires waterproofness, so the circuit board will be protected by glue during the production process, so the batch products can only expose two power lines outside.

[0004] If it is found during subsequent use that the program needs to be optimized and upgraded, the module can basically only be scrapped because it is difficult to remove after the glue has hardened, resulting in increased costs and waste of resources. Summary of the invention

[0005] In view of this, the present application provides a two-wire capacitive door handle, which realizes program update of the door handle module through two power lines. Specifically, it includes the following technical solutions:

[0006] In one aspect, a software upgrade system for a two-wire capacitive door handle is provided, the system comprising:

[0007] A first encoding circuit, a first decoding circuit and an updating unit provided in the door handle;

[0008] A decoding module, comprising a second encoding circuit, a second decoding circuit and a second communication circuit,

[0009] A host computer, comprising a first communication circuit;

[0010] The first encoding circuit and the second decoding circuit, and the first decoding circuit and the second encoding circuit are connected through the same power line.

[0011] In some embodiments of the present invention, the circuit structure of the first encoding circuit is specifically as follows:

[0012] The power line Load_PW is connected to the collector of the transistor Q1 via the package resistor R4, the emitter of the transistor Q1 is grounded, one end of the base of the transistor Q1 is connected to the output end via the resistor R6, and the other end is grounded via the capacitor C8.

[0013] In some embodiments of the present invention, a detection terminal TP7 is provided at the collector of the transistor Q1 , a detection terminal TP8 is provided at the base of the transistor Q1 , and a detection terminal TP9 is provided at the output end.

[0014] In some embodiments of the present invention, the circuit structure of the first decoding circuit is specifically as follows:

[0015] One end of the receiving data pin RXD is connected to the power line Load_PW through a resistor R10 and a capacitor C11, and the other end is grounded through a resistor R14; a detection terminal TP10 is provided between the capacitor C11 and the resistor R10.

[0016] In some embodiments of the present invention, the circuit structure of the second encoding circuit is specifically as follows:

[0017] The VBAT_PSU_SW power supply is connected to the collector of the transistor Q302 through the resistor R159 and the package resistor R300. The emitter of the transistor Q302 is grounded. One end of the base of the transistor Q302 is connected to the output end through the resistor R301, and the other end is grounded through the capacitor C234. The resistor R161 is connected in parallel with the resistor R159.

[0018] The branch where the resistor R159 and the package resistor R300 are located is grounded through the bidirectional TSV3, grounded through the capacitor C114, and connected to the power supply output terminal CON_PUS_LEFT+_OUT for powering the door handle.

[0019] In some embodiments of the present invention, the circuit structure of the second decoding circuit is specifically as follows:

[0020] The VBAT_PSU_SW power supply is connected to the cathode of the diode D26 through the resistor R164, and is connected to the source of the MOSFET; one end of the anode of the diode D26 is connected to the power supply output terminal CON_PUS_LEFT+_OUT through the resistor R169, which is used to power the door handle, and the other end is connected to the gate of the field effect tube MOSFET, one end of the drain is grounded through the resistor R173, and the other end is connected to the resistor R171, one end of the resistor R171 is connected to the output terminal L_PSU / HSU_IN, and the other end is grounded through the capacitor C112.

[0021] In some embodiments of the present invention, the first communication circuit communicates with the second communication circuit via CAN.

[0022] In some embodiments of the present invention, the host computer sends the upgrade data to the decoding module through the first communication circuit, the second encoding circuit encodes the received data, and sends it to the first decoding circuit of the door handle through the power cord, the first decoding circuit decodes the received data, and after the update unit verifies the legality and integrity of the sent upgrade data, the upgrade data is stored in the local memory to update the program.

[0023] In some embodiments of the present invention, the upgrade reply data is encoded by the first encoding circuit and sent to the decoding module through the power line. The second decoding circuit decodes the received data and sends it to the host computer through the first communication circuit.

[0024] The host computer sends the upgrade data to the door handle through the power line through the decoding module. The door handle decodes the coded upgrade data sent by the decoding module. After the upgrade is completed, the reply data is encoded and sent to the decoding module through the power line. The decoding module decodes and uploads it to the host computer. When the host computer does not receive a reply from the door handle, it will no longer send data to the door handle. By multiplexing the power line, two-way communication between the door handle and the host computer is achieved, thereby realizing the upgrade of the program of the two-wire capacitive door handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the structure of a software upgrade system for a two-wire capacitive door handle provided by an embodiment of the present invention;

[0027] Figure 2 A circuit diagram of a first encoding circuit and a first decoding circuit provided in an embodiment of the present invention, (a) is the first encoding circuit, (b) is the first decoding circuit,

[0028] Figure 3 A circuit diagram of a second encoding circuit and a second decoding circuit provided in an embodiment of the present invention, wherein (a) is the second encoding circuit, and (b) is the second decoding circuit;

[0029] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those of ordinary skill in the art.

[0032] Figure 1 The schematic diagram of the structure of the software upgrade system of the two-wire capacitive door handle provided by the embodiment of the present invention. For the convenience of explanation, only the part related to the embodiment of the present invention is shown. The door handle includes:

[0033] A first encoding circuit, a first decoding circuit and an updating unit provided in the door handle;

[0034] A decoding module, comprising a second encoding circuit, a second decoding circuit and a second communication circuit,

[0035] A host computer, comprising a first communication circuit;

[0036] Wherein, the first encoding circuit and the second decoding circuit, and the first decoding circuit and the second encoding circuit are connected via the same power line;

[0037] The host computer sends the upgrade data to the decoding module through the first communication circuit, the second encoding circuit encodes the received data and sends it to the first decoding circuit of the door handle through the power cord. The first decoding circuit decodes the received data. After the update unit verifies the legality and integrity of the sent upgrade data, it stores the upgrade data in the local memory and updates the program. After detecting that the program upgrade is successful, the upgrade success is used as reply data. If the program upgrade is unsuccessful, the upgrade failure is used as reply data. The reply data is encoded by the first encoding circuit and sent to the decoding module through the power cord. After the second decoding circuit decodes the received data, it sends it to the host computer through the first communication circuit.

[0038] The host computer sends the upgrade data to the door handle through the power line through the decoding module. The door handle decodes the coded upgrade data sent by the decoding module. After the upgrade is completed, the reply data is encoded and sent to the decoding module through the power line. The decoding module decodes and uploads it to the host computer. When the host computer does not receive a reply from the door handle, it will no longer send data to the door handle. By multiplexing the power line, two-way communication between the door handle and the host computer is achieved, thereby realizing the upgrade of the program of the two-wire capacitive door handle.

[0039] In the embodiment of the present invention, the first communication circuit and the second communication circuit are both CAN communication circuits. Since the CAN communication circuit is an existing communication circuit, the present invention will not elaborate on it here.

[0040] Figure 2 The circuit diagram of the first encoding circuit and the first decoding circuit provided in the embodiment of the present invention, (a) is the first encoding circuit, (b) is the first decoding circuit, for the convenience of explanation, only the part related to the embodiment of the present invention is shown, the first encoding circuit includes: the power line Load_PW is connected to the collector of the transistor Q1 through the package resistor R4, the emitter of the transistor Q1 is grounded, one end of the base of the transistor Q1 is connected to the output terminal OUTPUT through the resistor R6, and the other end is grounded through the capacitor C8; the collector of the transistor Q1 is provided with a detection terminal TP7; the base of the transistor Q1 is provided with a detection terminal TP8, and the output end is provided with a detection terminal TP9.

[0041] The first decoding circuit includes: one end of the receiving data pin RXD is connected to the power line Load_PW through a resistor R10 and a capacitor C11, and the other end is grounded through a resistor R14; a detection terminal TP10 is set between the capacitor C11 and the resistor R10.

[0042] Figure 3 A circuit diagram of a second encoding circuit and a second decoding circuit provided in an embodiment of the present invention, (a) is a second encoding circuit, (b) is a second decoding circuit, for ease of description, only the part related to the embodiment of the present invention is shown, and the second encoding circuit is specifically as follows:

[0043] The second decoding circuit includes: the VBAT_PSU_SW power supply is connected to the collector of the transistor Q302 through the resistor R159 and the package resistor R300, the emitter of the transistor Q302 is grounded, one end of the base of the transistor Q302 is connected to the output terminal OUTPUT through the resistor R301, and the other end is grounded through the capacitor C234, and the resistor R161 is connected in parallel with the resistor R159; the branch where the resistor R159 and the package resistor R300 are located is grounded through the bidirectional TSV3, and is grounded through the capacitor C114, and is connected to the power supply output terminal CON_PUS_LEFT+_OUT, which is used to power the door handle.

[0044] The second decoding circuit includes: the VBAT_PSU_SW power supply is connected to the cathode of the diode D26 through a resistor R164, and is connected to the source of the MOSFET; one end of the anode of the diode D26 is connected to the power supply output terminal CON_PUS_LEFT+_OUT through a resistor R169, which is used to power the door handle, and the other end is connected to the gate of the field effect transistor MOSFET, one end of the drain is grounded through a resistor R173, and the other end is connected to a resistor R171, one end of the resistor R171 is connected to the output terminal L_PSU / HSU_IN, and the other end is grounded through a capacitor C112.

[0045] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0046] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A software upgrade system for a two-wire capacitive door handle, characterized in that: The system comprises: A first encoding circuit, a first decoding circuit and an updating unit provided in the door handle; A decoding module, comprising a second encoding circuit, a second decoding circuit and a second communication circuit, A host computer, comprising a first communication circuit; The first encoding circuit and the second decoding circuit, and the first decoding circuit and the second encoding circuit are connected through the same power line.

2. The software upgrade system for a two-wire capacitive door handle as claimed in claim 1, characterized in that: The circuit structure of the first encoding circuit is as follows: The power line Load_PW is connected to the collector of the transistor Q1 via the package resistor R4, the emitter of the transistor Q1 is grounded, one end of the base of the transistor Q1 is connected to the output end via the resistor R6, and the other end is grounded via the capacitor C8.

3. The software upgrade system for a two-wire capacitive door handle as claimed in claim 2, characterized in that: A detection terminal TP7 and a detection terminal TP8 are respectively provided at the collector and the base of the transistor Q1 , and a detection terminal TP9 is provided at the output end.

4. The software upgrade system for a two-wire capacitive door handle as claimed in claim 1, characterized in that: The circuit structure of the first decoding circuit is as follows: One end of the receiving data pin RXD is connected to the power line Load_PW through a resistor R10 and a capacitor C11, and the other end is grounded through a resistor R14.

5. The software upgrade system for a two-wire capacitive door handle as claimed in claim 1, characterized in that: The circuit structure of the second encoding circuit is as follows: The power supply is connected to the collector of the transistor Q302 through the resistor R159 and the package resistor R300. The emitter of the transistor Q302 is grounded. One end of the base of the transistor Q302 is connected to the output end through the resistor R301, and the other end is grounded through the capacitor C234. The resistor R161 is connected in parallel with the resistor R159. The branch where the resistor R159 and the package resistor R300 are located is grounded through the bidirectional TSV3, grounded through the capacitor C114, and connected to the power supply output terminal, which is used to supply power to the door handle.

6. The software upgrade system for a two-wire capacitive door handle as claimed in claim 1, characterized in that: The circuit structure of the second decoding circuit is as follows: The power supply is connected to the cathode of the diode D26 and the source of the MOSFET through a resistor R164; one end of the anode of the diode D26 is connected to the power supply output terminal through a resistor R169, and the other end is connected to the gate of the field effect transistor MOSFET; one end of the drain is grounded through a resistor R173, and the other end is connected to a resistor R171; one end of the resistor R171 is connected to the output terminal, and the other end is grounded through a capacitor C112.

7. The software upgrade system for a two-wire capacitive door handle as claimed in claim 1, characterized in that: The first communication circuit communicates with the second communication circuit via CAN.

8. The software upgrade system for a two-wire capacitive door handle as claimed in claim 1, characterized in that: The host computer sends the upgrade data to the decoding module through the first communication circuit. The second encoding circuit encodes the received data and sends it to the first decoding circuit of the door handle through the power cord. The first decoding circuit decodes the received data. After the update unit verifies the legality and integrity of the sent upgrade data, it stores the upgrade data in the local memory to update the program.

9. The software upgrade system for a two-wire capacitive door handle as claimed in claim 7, characterized in that: The upgrade reply data is encoded by the first encoding circuit and sent to the decoding module through the power line. The second decoding circuit decodes the received data and sends it to the host computer through the first communication circuit.

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