Voltage detecting circuit in vehicle-mounted equipment and vehicle-mounted equipment

A technology of voltage detection circuit and vehicle-mounted equipment, applied in the direction of measuring current/voltage, voltage divider, measuring device, etc., can solve the problems of increasing power consumption, generating current, wasting electric energy, etc., and achieving the effect of reducing power consumption

Inactive Publication Date: 2014-07-02
CHINA TRANSINFO TECH CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, using resistors for voltage division can easily generate current on the voltage divider resistors, increasing power consumption and wasting electric energy
That is to say, the method of...

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  • Voltage detecting circuit in vehicle-mounted equipment and vehicle-mounted equipment
  • Voltage detecting circuit in vehicle-mounted equipment and vehicle-mounted equipment

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Embodiment Construction

[0055] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0056] refer to figure 1 , which shows a structural diagram of an embodiment of a voltage detection device in a vehicle-mounted device according to the present invention, which may specifically include: a microcontroller 101 and a voltage detection circuit 102;

[0057] Wherein, the voltage detection circuit 102 may specifically include:

[0058] A voltage output terminal Vo, which is connected to the input pin of the built-in A / D conversion circuit of the microcontroller 101;

[0059] Enable terminal Ven, which is connected to the I / O port of the microcontroller 101;

[0060] a voltage input terminal Vi, which is connected to the energy storage element;

[0061] The first resistor R1, the second resistor R2, the third resistor...

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Abstract

The invention provides a voltage detecting device in vehicle-mounted equipment and the vehicle-mounted equipment. The voltage detecting device comprises a microcontroller and a voltage detecting circuit. The voltage detecting circuit comprises a voltage output end Vo, an enabling end Ven, a voltage input end Vi, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first audion Q1 and a second audion Q2. The voltage output end Vo is connected with an input pin of an A/D converting circuit arranged in the microcontroller. The enabling end Ven is connected with an I/O port of the microcontroller. The voltage input end Vi is connected with an energy storage element. The microcontroller comprises a first level operation module, a sampling module and a voltage computing module. Under the condition that extra power loss is not increased basically, the voltage of the energy storage element higher than the input voltage of the I/O port of the microcontroller is detected.

Description

technical field [0001] The invention relates to the technical field of vehicle equipment, in particular to a voltage detection circuit in the vehicle equipment and a vehicle equipment. Background technique [0002] At present, in order to achieve intelligent, real-time, and dynamic management of vehicles, a communication protocol suitable for roads and vehicles in the field of intelligent transportation has been specially developed internationally, that is, Dedicated Short Range Communication (DSRC, Dedicated Short Range Communication) protocol. DSRC system is a wireless communication system that organically connects vehicles and roads through two-way transmission of information. It mainly includes three parts: on-board equipment (OBU, On-Board Unit), roadside equipment, and DSRC protocol. [0003] The on-board equipment needs a strong power module to provide enough power for the working modules (card reader module, DSRC receiving and transmitting module, etc.). Traditional...

Claims

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Application Information

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IPC IPC(8): G01R19/00G01R15/04G05F1/56
Inventor 刘起昌陈永峰赵志泳刘志勇张志平夏曙东
Owner CHINA TRANSINFO TECH CORP
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