Intelligent electric power management implementation device for vehicle-mounted unit of non-stop toll collecting system

Abstract

The invention relates to a no stop electronic toll collection system on-vehicle unit intelligent power manager, comprising an awake signal amplifying circuit, a power management module microcontroller and a DC / DC circuit module, wherein the input of the awake signal amplifying circuit is used as the input of the no stop electronic toll collection system on-vehicle unit intelligent power management device, whose output is connected with the input of the power management module microcontroller for transmitting awake interrupt request signals to the power management module microcontroller, thereby activating the power management module microcontroller from sleep stage, the activated power management module microcontroller generates a DC / DC enable signal which is input to the DC / DC circuit module via the output of the power management module microcontroller, the output of the DC / DC circuit module is used as the output of the no stop electronic toll collection system on-vehicle unit intelligent power management device. The no stop electronic toll collection system on-vehicle unit intelligent power manager can reduce the power consumption of OBU and improve the utilization rate of battery.

Description

technical field [0001] The invention belongs to the power supply management realization technology of equipment in the field of intelligent traffic electronic toll collection, in particular to an intelligent power supply management realization device for a vehicle-mounted unit of a non-stop toll collection system. Background technique [0002] Electronic Toll Collection (ETC) is a special application in the field of intelligent transportation systems. The ETC system is an advanced system composed of microwave technology, electronic technology, computer technology, communication and network technology, information technology, sensor technology, image recognition technology and other high-tech equipment and software (including management), in order to realize the vehicle without Parking can automatically collect road tolls. [0003] At present, the non-stop toll collection system (ETC) is designed to be composed of roadside reading and writing equipment (Road Side Unit, refer...

AI Technical Summary

Problems solved by technology

[0005] 1. The utilization rate of the battery is not high: after working for a long time, with the consumption of the battery capacity, the battery voltage drops, even lower than the minimum working voltage of some devices. Lower battery utilization

[0006] 2. Poor load capacity: For loads with a large current, such as IC card read-write modules, DSRC (dedicated short-range communication) chips, etc., after starting to work, the battery voltage swing is large, and the constant voltage output cannot be guaranteed, and even some module not working

[0007] 3 Excessive quiescent current: In the entire life cycle of the OBU, the OBU is in sleep mode most of the time, the static power consumption during the sleep period is very large, and the battery is wasted seriously. The service life of the product

[0008] These shortcomings have brought inconvenience to consumers and directly affected the primary issue of product competitiveness.

In the final analysis, the defect of the prior art is that the power consumption of the OBU is too large

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