阅读说明：本技术 故障状态下独立输出关断保护功能二合一加热系统 (Independent output shutoff protection function two-in-one heating system under fault state ) 是由 周浩民 于 2021-02-03 设计创作，主要内容包括：本发明属于汽车保障系统应用技术领域,具体公开了故障状态下独立输出关断保护功能二合一加热系统,包括SBC模块、MCU控制单元、第一与门1、第二与门2、高边驱动、传感器、低边驱动和加热丝。本发明的故障状态下独立输出关断保护功能二合一加热系统的有益效果在于：1、采用SBC模块的LIMP功能和控制单元的IO1或IO2同时控制,通过第一与门1、第二与门2输出驱动加热丝工作,这样做到加热驱动冗余,确保当系统部分器件故障时,加热系统处于关闭状态；2、能独立输出关断加热功能,有效的保证加热系统的安全,进而杜绝因过功率、过电流而造成车辆事故现象的出现。(The invention belongs to the technical field of application of automobile support systems, and particularly discloses a two-in-one heating system with an independent output turn-off protection function in a fault state. The two-in-one heating system with the independent output turn-off protection function in the fault state has the advantages that: 1. the LIMP function of the SBC module and the IO1 or IO2 of the control unit are adopted for simultaneous control, and the heating wires are driven to work through the output of the first AND gate 1 and the output of the second AND gate 2, so that the heating driving redundancy is realized, and the heating system is ensured to be in a closed state when partial devices of the system are in failure; 2. the heating function can be independently output and switched off, the safety of a heating system is effectively guaranteed, and the occurrence of vehicle accidents caused by over-power and over-current is further avoided.)

1. Independent output shutoff protect function two unification heating system under fault condition, its characterized in that: the device comprises an SBC module, an MCU control unit, a first AND gate 1, a second AND gate 2, a high-side driver, a sensor, a low-side driver and a heating wire; the MCU control unit is respectively connected with the SBC module, the first AND gate 1 and the second AND gate 2; the first AND gate 1 and the second AND gate 2 are respectively connected with a high side drive and a low side drive; the high-side drive and the low-side drive are respectively connected with the heating wires; the sensor is respectively connected with the MCU control unit and the heating wire; and the SBC module is respectively connected with the first AND gate 1 and the second AND gate 2.

2. The fail-state, independent-output, shutdown protection function two-in-one heating system of claim 1, further comprising: the SBC module is a low-voltage power supply and communication interface of the whole vehicle; and the MCU control unit acquires LIN data from the whole vehicle.

3. The operating method of the independent output shutdown protection function two-in-one heating system in the fault state as claimed in claim 2, characterized in that: comprises the following steps of (a) carrying out,

step 1, an SBC module is a low-voltage power supply and communication interface of a whole vehicle, is connected with an MCU through the communication interface and performs data interaction with the whole vehicle;

and 2, acquiring LIN data from the whole vehicle by the MCU control unit, and executing a high-side driving/low-side driving signal to enable the heating wire to work after data processing.

4. The operating method of the independent output shutdown protection function two-in-one heating system in the fault state as claimed in claim 3, wherein: in the step 2, when LIN data needs the HOD detection function, the steering wheel heating function must be closed, and the HOD detection function has higher priority; when IO1 or IO2 of the MCU control unit fails or a certain aspect of the SBC module fails, the heating system is ensured to be in a closed state, and the high-side drive and low-side drive switches are controlled together through the first AND gate 1 and the second AND gate 2 by using the LIMP functions of the MCU control unit and the SBC module, so that control redundancy is achieved, the high-side drive and the low-side drive are ensured to be in a closed state, and the safety of the system is ensured.

Technical Field

The invention belongs to the technical field of application of automobile security systems, and particularly relates to a two-in-one heating system with an independent output turn-off protection function in a fault state.

Background

The comfort and safety of the driving experience has become a trend in the mass automotive market.

In cold winter, the steering wheel heating system is indispensable, in order to the drawing close to the tendency of automatic driving, the steering wheel is apart from the hand and detects and also becomes ADAS (advanced driving assistance system)'s standard and joins in marriage, in order to practice thrift the cost and improve the simplicity and the security of whole car system, heating and steering wheel are apart from the hand and detect two unification schemes and come into production. When considering ADAS (advanced driving assistance system) steering wheel hands-off detection and heating functions, the priority of the ADAS and the hands-off detection and the heating functions in application must be considered, and when some devices fail, how to ensure that the heating system does not work normally is avoided, so as to avoid vehicle accidents caused by over-power and over-current.

Based on the above problems, the present invention provides a two-in-one heating system with independent output shutdown protection function in a fault state.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a two-in-one heating system with an independent output turn-off protection function in a fault state, which has reasonable design, solves the problem that when the driving or control part of a heating wire is abnormal, the heating wire cannot be ensured to be in a non-working state, and hidden danger is brought to the heating system, can independently output the turn-off heating function when a device (/ part) fails to heat a steering wheel and a hands-off detector or the system is in a fault state, effectively ensures the safety of the heating system, and further avoids vehicle accidents caused by over-power and over-current.

The technical scheme is as follows: the invention provides a two-in-one heating system with an independent output turn-off protection function in a fault state, which comprises an SBC module, an MCU control unit, a first AND gate 1, a second AND gate 2, a high-side driver, a sensor, a low-side driver and a heating wire; the MCU control unit is respectively connected with the SBC module, the first AND gate 1 and the second AND gate 2; the first AND gate 1 and the second AND gate 2 are respectively connected with a high side drive and a low side drive; the high-side drive and the low-side drive are respectively connected with the heating wires; the sensor is respectively connected with the MCU control unit and the heating wire; and the SBC module is respectively connected with the first AND gate 1 and the second AND gate 2.

According to the technical scheme, the SBC module is a low-voltage power supply and communication interface of the whole vehicle; and the MCU control unit acquires LIN data from the whole vehicle.

The working method of the independent output shutoff protection function two-in-one heating system in the fault state comprises the following steps that 1, an SBC module supplies power to a low-voltage power supply of a whole vehicle and a communication interface, and is connected with an MCU through the communication interface to perform data interaction with the whole vehicle. And 2, acquiring LIN data from the whole vehicle by the MCU control unit, and executing a high-side driving/low-side driving signal to enable the heating wire to work after data processing.

In the technical scheme, when the LIN data needs the HOD detection function in the step 2, the steering wheel heating function must be closed, and the HOD detection function has higher priority; when IO1 or IO2 of the MCU control unit fails or a certain aspect of the SBC module fails, the heating system is ensured to be in a closed state, and the high-side drive and low-side drive switches are controlled together through the first AND gate 1 and the second AND gate 2 by using the LIMP functions of the MCU control unit and the SBC module, so that control redundancy is achieved, the high-side drive and the low-side drive are ensured to be in a closed state, and the safety of the system is ensured.

Compared with the prior art, the two-in-one heating system with the independent output turn-off protection function in the fault state has the beneficial effects that: 1. the LIMP function of the SBC module and the IO1 or IO2 of the control unit are adopted for simultaneous control, and the heating wires are driven to work through the output of the first AND gate 1 and the output of the second AND gate 2, so that the heating driving redundancy is realized, and the heating system is ensured to be in a closed state when partial devices of the system are in failure; 2. the heating function can be independently output and switched off, the safety of a heating system is effectively guaranteed, and the occurrence of vehicle accidents caused by over-power and over-current is further avoided.

Drawings

FIG. 1 is a block diagram of a modular system for an independent output shutoff protection function two-in-one heating system of the present invention in a fault condition;

fig. 2 is an electrical schematic diagram of a modular system of the independent output shutdown protection function two-in-one heating system of the present invention in a fault condition.

Detailed Description

The invention is further elucidated with reference to the drawings and the embodiments.

As shown in fig. 1 and 2, the two-in-one heating system with independent output turn-off protection function in the fault state includes an SBC module, an MCU control unit, a first and gate 1, a second and gate 2, a high side driver, a sensor, a low side driver, and a heating wire; the MCU control unit is respectively connected with the SBC module, the first AND gate 1 and the second AND gate 2; the first AND gate 1 and the second AND gate 2 are respectively connected with a high side drive and a low side drive; the high-side drive and the low-side drive are respectively connected with the heating wires; the sensor is respectively connected with the MCU control unit and the heating wire; and the SBC module is respectively connected with the first AND gate 1 and the second AND gate 2.

Preferably, the SBC module is a low-voltage power supply and communication interface of the entire vehicle, and the MCU control unit collects LIN data from the entire vehicle.

The working method of the independent output shutoff protection function two-in-one heating system in the fault state comprises the following steps that 1, an SBC module supplies power to a low-voltage power supply of a whole vehicle and a communication interface, and is connected with an MCU through the communication interface to perform data interaction with the whole vehicle. And 2, acquiring LIN data from the whole vehicle by the MCU control unit, and executing a high-side driving/low-side driving signal to enable the heating wire to work after data processing.

Further preferably, in step 2, when the LIN data requires the HOD detection function, the steering wheel heating function must be turned off, and the HOD detection function has a higher priority; when IO1 or IO2 of the MCU control unit fails or a certain aspect of the SBC module fails, the heating system is ensured to be in a closed state, and the high-side drive and low-side drive switches are controlled together through the first AND gate 1 and the second AND gate 2 by using the LIMP functions of the MCU control unit and the SBC module, so that control redundancy is achieved, the high-side drive and the low-side drive are ensured to be in a closed state, and the safety of the system is ensured.

Examples

The technical problem to be solved by the invention is as follows: when the driving part or the control part of the heating wire is abnormal, the heating wire cannot be ensured to be in a non-working state, and hidden danger is brought to a heating system.

According to the two-in-one heating system with the independent output and turn-off protection function in the fault state, when the system works normally, the LIMP output is high level;

when the heating function needs to be started, the received LIN data is processed through the MCU, and then the AND gate controllers on the high and low sides are driven through the IO, and finally the work of the heating wire is realized;

when LIN data comprises an HOD function, the HOD function has higher priority than a heating function, only the IO level of a control AND gate needs to be pulled down, a heating wire stops working, and the HOD can acquire state data of a steering wheel through a sensor;

the state of each device in normal operation (see table below): 1: high level, 0: low level, x: any state.

When the SBC fails, the LIMP is pulled down, and the heating wires cannot normally work no matter whether heating data come in or not, so that the system is ensured to be in a safe state;

the state of each device in abnormal operation (see table below): 1: high level, 0: low level, x: any state.

LIMP	IO1	IO2	AND gate output	Heating wire status
					0	x	0	0	Not working
0	0	x	0	Not working
					0	1	1	0	Not working

The working principle of the two-in-one heating system with the independent output turn-off protection function in the fault state is as follows: the SBC module is a low-voltage power supply and communication interface of the whole vehicle, is connected with the MCU control unit through the communication interface and performs data interaction with the whole vehicle; the MCU control unit acquires LIN data from the whole vehicle, and executes high/low side driving signals through data processing to enable the heating wires to work; meanwhile, when LIN data needs the HOD detection function, the steering wheel heating function must be closed, and the HOD detection function has higher priority; when the MCU control unit IO1/IO2 fails or some aspect of the SBC module fails, the heating system is ensured to be in a closed state, the LIMP functions of the MCU control unit IO1/IO2 and the SBC module are used for controlling the switches of the high side and the low side through the AND gate, control redundancy is achieved, and the high side and the low side are ensured to be in the closed state to ensure the safety of the system.

The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.