CN101551671A

CN101551671A - Automobile vehicle controller monitoring resetting method and device

Info

Publication number: CN101551671A
Application number: CNA200910138654XA
Authority: CN
Inventors: 桂海勇
Original assignee: SAIC Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2009-05-12
Filing date: 2009-05-12
Publication date: 2009-10-07
Anticipated expiration: 2029-05-12
Also published as: CN101551671B

Abstract

The invention relates to an automobile entire controller monitoring resetting method and device, capable of effectively monitoring the vehicle controller and timely resetting the main chip of the vehicle controller when the fault occurs on the vehicle controller. The monitoring resetting method is characterized in that: the main chip of the vehicle controller periodically sends the pulse signal to a watchdog circuit module, when the fault occurs on the vehicle controller and the main chip does not send the pulse signal to the watchdog circuit module for exceeding one period, the watchdog circuit module generates the resetting signal and the resetting signal is sent to the main chip of the vehicle controller and the vehicle controller power module to force the main chip reset.

Description

A kind of automobile vehicle controller monitoring resetting method and device

Technical field

The present invention relates to a kind of automobile vehicle controller monitoring resetting method and device.

Background technology

In the development of modern electric automobile, electric machine controller (MCU), battery management system (BMS) and entire car controller (VMS) are the core components of electric automobile, and entire car controller is equivalent to the brain of electric automobile, the duty of monitoring electric machine controller (MCU) and battery management system (BMS) is so entire car controller (VMS) work is stable extremely important.

The information processing capacity that entire car controller (VMS) master chip is finished is very big, so its stability is proposed very high requirement.Under the operating mode of electric automobile, controller (VMS) work is subjected to the interference of other power supplys or electromagnetic field easily, and controller breaks down easily or enters abnomal condition such as endless loop.

Summary of the invention

Goal of the invention of the present invention is to provide a kind of automobile vehicle controller monitoring resetting method and device, can the effective monitoring entire car controller, and the entire car controller master chip is resetted.

The present invention is based on same inventive concept, have two independent technique schemes:

1, a kind of monitoring and reset method of vehicle complete vehicle controller, it is characterized in that: the entire car controller master chip periodically sends pulse signal to the watchdog circuit module, when entire car controller breaks down, when master chip surpasses one-period to watchdog circuit module transmission pulse signal, the watchdog circuit module produces reset signal, this reset signal is sent to entire car controller master chip and entire car controller power module, forces master chip to reset.

2, a kind of device of realizing aforementioned automobile vehicle controller monitoring resetting method, it is characterized in that: the signal output part of entire car controller master chip connects the signal input part of watchdog circuit, and the watchdog reset signal output part connects entire car controller master chip and entire car controller power module.

The beneficial effect that the present invention has:

When entire car controller broke down, watchdog circuit output reset signal in time resetted entire car controller, has effectively guaranteed the stable operation of car load control device.

Description of drawings

Fig. 1 is a circuit structure block diagram of the present invention;

Fig. 2 is a watchdog circuit structured flowchart of the present invention;

Fig. 3 is a watchdog circuit schematic diagram of the present invention.

Embodiment

As shown in Figure 1, the signal output part of entire car controller master chip connects the signal input part of watchdog circuit, and the watchdog reset signal output part connects entire car controller master chip and entire car controller power module.

As shown in Figure 2, the structure of watchdog circuit is, has MOSFET pipe trigger module, the signal input part of this trigger module connects the master chip of entire car controller, the signal output part of this trigger module is connected the reset signal output termination entire car controller master chip and the entire car controller power module of the 3rd MOSFET pipe trigger module successively with first filtration module, first phase inverter, second phase inverter, the 2nd MOSFET pipe trigger module, second filtration module, the 3rd phase inverter, the 3rd MOSFET pipe trigger module.

As shown in Figure 3, be connected to charging capacitor C1 between the signal input part of the signal output part of entire car controller master chip and MOSFET pipe trigger module.

During the entire car controller operate as normal, master chip periodically sends high level pulse signal (5V voltage square wave signal, cycle is 10ms) to watchdog circuit, by capacitor C 1 charging and discharging, make the MOSFET pipe RG1 conducting in the MOSFET pipe trigger module, MOSFET pipe RG1 output negative edge spiking, by resistance R 1 capacitor C 2, first filtration module that C3 forms filters the peak voltage signal, this signal is through the first phase inverter RB, the second phase inverter RC output low level, at this moment, not conducting of MOSFET pipe RG2 in the 2nd MOSFET pipe trigger module, not conducting of MOSFET pipe RG3 in the 3rd MOSFET pipe trigger module, the reset signal (RESET) of MOSFET pipe RG3 signal output is unsettled.

When entire car controller breaks down, because master chip can not periodically send the high level pulse signal, then not conducting of MOSFET pipe RG1, the second phase inverter RC exports high level, MOSFET pipe RG2 conducting, MOSFET pipe RG2 output negative edge spiking, second filtration module of being made up of resistance R 2, capacitor C 4 filters the peak voltage signal, this signal is through the 3rd phase inverter RD output high level, and MOSFET manages the RG3 conducting, and the reset signal of MOSFET pipe RG3 output is a low level signal.The reset signal low level is effective, and the entire car controller master chip is automatically reset, and is working properly and produce cyclic pulse signal again and give watchdog circuit up to master chip.Simultaneously, reset signal feeds back to the input end of watchdog circuit phase inverter RA.

Claims

2, automobile vehicle controller monitoring resetting method according to claim 1 is characterized in that: during the entire car controller operate as normal, master chip periodically sends the high level pulse signal to watchdog circuit; The reset signal low level of watchdog circuit output is effective.

3, automobile vehicle controller monitoring resetting method according to claim 2, it is characterized in that: the structure of watchdog circuit is, has MOSFET pipe trigger module, the signal input part of this trigger module connects the master chip of entire car controller, the signal output part of this trigger module and first filtration module, first phase inverter, second phase inverter, the 2nd MOSFET manages trigger module, second filtration module, the 3rd phase inverter, the 3rd MOSFET pipe trigger module connects successively, the reset signal output termination entire car controller master chip and the entire car controller power module of the 3rd MOSFET pipe trigger module.

4, automobile vehicle controller monitoring resetting method according to claim 3 is characterized in that: be connected to charging capacitor between the signal input part of the signal output part of entire car controller master chip and MOSFET pipe trigger module.

5, a kind of device of realizing claim 1 automobile vehicle controller monitoring resetting method, it is characterized in that: the signal output part of entire car controller master chip connects the signal input part of watchdog circuit, and the watchdog reset signal output part connects entire car controller master chip and entire car controller power module.

6, the device of realization automobile vehicle controller monitoring resetting method according to claim 5, it is characterized in that: the structure of watchdog circuit is, has MOSFET pipe trigger module, the signal input part of this trigger module connects the master chip of entire car controller, the signal output part of this trigger module and first filtration module, first phase inverter, second phase inverter, the 2nd MOSFET manages trigger module, second filtration module, the 3rd phase inverter, the 3rd MOSFET pipe trigger module connects successively, the reset signal output termination entire car controller master chip and the entire car controller power module of the 3rd MOSFET pipe trigger module.

7, the device of realization automobile vehicle controller monitoring resetting method according to claim 6 is characterized in that: be connected to charging capacitor between the signal input part of the signal output part of entire car controller master chip and MOSFET pipe trigger module.