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Bus device

A bus device and bus technology, applied in the direction of instrumentation, electrical digital data processing, etc., can solve the problem of high cost, achieve low cost, extend the effective communication distance, and reduce the effect of level conversion time constant

Active Publication Date: 2016-12-07
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, using optical fiber as the bus to extend the effective communication distance of the bus, but the cost of this solution is relatively high

Method used

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Embodiment Construction

[0018] Before describing the various embodiments of the present invention in detail, the factors affecting the effective communication distance of the bus are firstly analyzed below.

[0019] figure 1 A schematic diagram of an existing bus device is shown. Such as figure 1 As shown, the bus device 10 has a power supply input A, a point B, which can be connected to a power supply, and a ground terminal C, which can be connected to ground. The bus device 10 is connected to the bus T via point B.

[0020] The bus device 10 includes a high switch module 20 , a low switch module 30 , a resistor 40 and a receiving module 50 .

[0021] The high-position switch module 20 has a control terminal I11, an input terminal I12 and an output terminal I13, and is connected between the power input terminal A and the point B of the bus device 10, that is, the input terminal I12 and the output terminal I13 of the high-position switch module 20 are respectively connected to Power supply input ...

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Abstract

The invention relates to a bus device, which sends information on a bus in virtue of a plurality of levels. The bus device at least comprises a high-order switch module, a low-order switch module, a first resistor, a charging module and a control module, wherein the high-order switch module is provided with a control end, an input end and an output end, and the input end and the output end are independently connected with the power supply input end of the bus device and a first point which can be connected with the bus; the low-order switch module is provided with a control end, an input end and an output end, wherein the input end and the output end of the low-order switch module are independently connected with the first point and the grounding end of the bus device; the first resistor is connected between the first point and the ground; and the charging module is connected to the first point; and the control module is used for controlling the charging module to provide current for the bus on the basis of the control signals provided for the control end of the high-order switch module and the control end of the low-order switch module. By use of the bus device, the effective communication distance of the bus can be prolonged at a low cost.

Description

technical field [0001] The invention relates to a bus device. Background technique [0002] A bus is a public communication trunk that transmits information between various devices, and it is a transmission harness composed of wires. In order to be able to transmit information via a bus, a device is usually equipped with a bus device and sends and / or receives information on the bus by controlling the equipped bus device. [0003] Current typical bus standards include RS323, RS485, etc., but the effective communication distance that these bus standards can support is limited. For example, the bus standard RS485 can only support an effective communication distance of 1.5 kilometers. [0004] In order to extend the effective communication distance of the bus, some solutions have been proposed. For example, using optical fiber as the bus to extend the effective communication distance of the bus, but the cost of this solution is relatively high. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): G06F13/40
Inventor 支耀辉丁桂萍万国红杨捷罗宗正
Owner ROBERT BOSCH GMBH