A low-voltage wire harness for an error-proofing of a circuit with resistance

Abstract

The utility model relates to the field of automobile manufacturing, concretely relates to a low pressure wire harness for mistake proofing of resistance type circuit. It includes cabin wire harness, front protection wire harness, left front bluetooth slave module and right front bluetooth slave module, is provided with the joint pressure point between front protection wire harness and left front bluetooth slave module, right front bluetooth slave module, forms the branch wire harness of left front bluetooth slave module and right front bluetooth slave module, the branch wire harness length of left front bluetooth slave module and right front bluetooth slave module is same and all is less than or equal to 1m. The utility model relates to the improvement cost of wire harness circuit is low, and the risk of wrong installation is solved forever, and other negative influence will not be brought.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing, specifically to a low-voltage wiring harness for use in resistive circuits with error prevention. Background Technology

[0002] From its early days of simple call functionality to today's integrated systems supporting music, navigation, and vehicle control, Bluetooth has become an indispensable wireless communication foundation for modern automobiles. Automotive Bluetooth systems first exchange data within the system via a proprietary CAN bus, and then exchange data with the entire vehicle via the body's CAN bus. The CAN bus uses two wires (CAN_H and CAN_L), transmitting data through a voltage difference, and requires a 120Ω resistor at each end of the bus to prevent signal reflection.

[0003] The current mainstream approach involves confirming and fixing the positions of the terminals and nodes, placing the two terminals at the farthest end of the circuit to form the backbone of the CAN bus, and then connecting the slave nodes to the backbone to form slave nodes. This method is not suitable for installing parts that are identical in appearance but have different internal hardware in close proximity, as installers cannot distinguish them. Using visual methods such as labels for differentiation would greatly reduce production efficiency and is not conducive to assembly line production. Utility Model Content

[0004] This invention addresses the problem of malfunctions in multi-master, broadcast-type CAN bus networks caused by incorrect installation of resistive terminals and non-resistive slave modules. It proposes a fault-proof low-voltage wiring harness for resistive circuits. Using this circuit eliminates the need to distinguish between terminals and nodes, significantly accelerating production and increasing efficiency. The specific technical solution is as follows:

[0005] A low-voltage wiring harness for resistive circuits with error prevention includes a cabin wiring harness, a front bumper wiring harness, a left front Bluetooth slave module, and a right front Bluetooth slave module. A voltage-combining point is provided between the front bumper wiring harness and the left front Bluetooth slave module and the right front Bluetooth slave module to form branch wiring harnesses of the front Bluetooth slave module and the right front Bluetooth slave module. The branch wiring harnesses of the left front Bluetooth slave module and the right front Bluetooth slave module have the same length and are all ≤1m.

[0006] Furthermore, a terminating resistor is provided in either the left front Bluetooth slave module or the right front Bluetooth slave module.

[0007] Furthermore, the distance between the left front Bluetooth slave module and the right front Bluetooth slave module is ≤ 2 times the length of the branch harness.

[0008] Since the Bluetooth slave modules are completely identical in appearance, differing only in their internal hardware, assembly workers cannot visually identify which module with the terminal electronics should be installed on the right. This invention places the branch's contact point between the two modules, ensuring that both branches are ≤1m. This guarantees that regardless of whether the module is installed correctly (right Bluetooth slave module with resistor) or incorrectly, the branch length meets the requirements without affecting the length requirements of the CAN network segments. This invention's improved wiring harness circuitry is low-cost, permanently solving the risk of incorrect installation without causing other negative impacts. Attached Figure Description

[0009] Figure 1 A schematic diagram of the wire harness arrangement method of this utility model;

[0010] Figure 2 Schematic diagram of the second wiring harness arrangement method of this utility model. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] like Figure 1-2 As shown, a low-voltage wiring harness for resistive circuits with error prevention includes a cabin wiring harness, a front bumper wiring harness, a left front Bluetooth slave module, and a right front Bluetooth slave module. A voltage-combining point is provided between the front bumper wiring harness and the left front Bluetooth slave module and the right front Bluetooth slave module to form branch wiring harnesses of the front Bluetooth slave module and the right front Bluetooth slave module. The branch wiring harnesses of the left front Bluetooth slave module and the right front Bluetooth slave module have the same length and are all ≤1m.

[0013] A terminating resistor is set in either the left front Bluetooth slave module or the right front Bluetooth slave module.

[0014] The distance between the left front Bluetooth slave module and the right front Bluetooth slave module is ≤ 2 times the length of the branch harness.

[0015] Since the Bluetooth slave modules are completely identical in appearance, differing only in their internal hardware, assembly workers cannot visually identify which module with the terminal electronics should be installed on the right. This invention places the branch's contact point between the two modules and ensures that both branches are ≤1m. This guarantees that regardless of whether the correct module assembly method (right Bluetooth slave module with resistor) or an "incorrect" method is used, the branch length meets the requirements without affecting the length requirements of the CAN network segments.

[0016] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A low-voltage wiring harness for use in resistive circuits with error prevention, characterized in that: It includes a cabin wiring harness, a front bumper wiring harness, a left front Bluetooth slave module, and a right front Bluetooth slave module. A bonding point is set between the front bumper wiring harness and the left front Bluetooth slave module and the right front Bluetooth slave module to form branch wiring harnesses of the front Bluetooth slave module and the right front Bluetooth slave module. The branch wiring harnesses of the left front Bluetooth slave module and the right front Bluetooth slave module have the same length and are all ≤1m.

2. A low-voltage wiring harness for error-proofing resistive circuits according to claim 1, characterized in that: A terminating resistor is set in either the left front Bluetooth slave module or the right front Bluetooth slave module.

3. A low-voltage wiring harness for error-proofing resistive circuits according to claim 1, characterized in that: The distance between the left front Bluetooth slave module and the right front Bluetooth slave module is ≤ 2 times the length of the branch harness.

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