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Detection system and detection method for positive-inverse current single loop based on controller area network (CAN)

A detection system, single-loop technology, applied in the direction of using digital measurement technology for measurement, can solve the problem of difficult measurement, and achieve the effect of simple measurement method and high efficiency

Inactive Publication Date: 2012-08-08
AEROSPACE HI TECH HLDG GROUP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem that the reverse current signal needs to be converted into a positive current for measurement during the signal detection process of the instrument, and the measurement is difficult, and provides a forward and reverse current single-loop detection system and detection method based on the CAN network

Method used

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  • Detection system and detection method for positive-inverse current single loop based on controller area network (CAN)
  • Detection system and detection method for positive-inverse current single loop based on controller area network (CAN)

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specific Embodiment approach 1

[0016] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the forward and reverse current single-loop detection system based on CAN network described in this embodiment, it includes CAN module unit 1, it also includes central processing unit 2, signal conversion module unit 3, current sampling unit 4, signal output unit 5 and sampling feedback unit 6,

[0017] The control signal output end of the CAN module unit 1 is connected to the control signal input end of the central processing unit 2, the control signal output end of the central processing unit 2 is connected to the control signal input end of the signal conversion module unit 3, and the voltage signal of the signal conversion module unit 3 passes through The signal output unit 5 outputs to the load,

[0018] The current sampling unit 4 is used to collect the current of the load loop, the current signal output end of the current sampling unit 4 is connected to the current sig...

specific Embodiment approach 2

[0020] Embodiment 2: This embodiment is a further description of Embodiment 1. The signal conversion module unit 3 is used to output a power supply of +12 volts, +24 volts or below 0.3 volts according to the control instructions of the central processing unit 2. give load.

[0021] In this embodiment, the conversion of the high and low power supply signals of the load circuit is realized through the signal conversion module unit 3, which makes it more convenient to obtain the forward and reverse currents of the load circuit.

specific Embodiment approach 3

[0022] Specific implementation mode three: the following combination figure 1 Describe the present embodiment, the present embodiment is a kind of detection method of the forward and reverse current single-loop detection system based on the CAN network described in the first embodiment, it comprises the following steps:

[0023] Step 1: Make the CAN module unit 1 output a control signal to the central processing unit 2, and the central processing unit 2 controls the signal conversion module unit 3 to output a high signal or a low signal;

[0024] Step 2: Using the current sampling unit 4 to collect the current of the load circuit;

[0025] Step 3: The current signal collected by the current sampling unit 4 is fed back to the central processing unit 2 through the sampling feedback unit 6 .

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Abstract

The invention provides a detection system and a detection method for a positive-inverse current single loop based on controller area network (CAN), belongs to the technical field of current detection, and solves the problem that in an instrument signal detection process, inverse current signals are needed to be converted into positive current signals to be measured, and measurement difficulty is large. The detection system comprises a CAN module unit, a central processing unit, a signal conversion module unit, a current sampling unit, a signal output unit and a sampling feedback unit. The detection method includes that the CAN module unit outputs control signals to the central processing unit, the central processing unit controls the signal conversion module unit to output high signals or low signals, the current sampling unit is used for collecting current of a load loop, current signals obtained by the current sampling unit is fed back to the central processing unit through the sampling feedback unit. The detection system and the detection method are suitable for detection of the positive-inverse current single loop based on the CAN.

Description

technical field [0001] The invention relates to a forward and reverse current single-loop detection system and detection method based on a CAN network, belonging to the technical field of current detection. Background technique [0002] In the signal detection process of instruments, etc., it is often necessary to detect its current signal to judge whether the state of its printed board is qualified, so it is generally necessary to provide high and low signals to the instrument, so as to obtain the corresponding output point of the instrument. Positive and negative currents. When measuring the instrument, the positive current can be directly obtained, and the reverse current needs to be switched to positive current measurement, which increases the difficulty of measurement. Contents of the invention [0003] The invention aims to solve the problem that the reverse current signal needs to be converted into a positive current for measurement during the signal detection proc...

Claims

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Application Information

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IPC IPC(8): G01R19/25
Inventor 胡伟滕胜广王洋王宇李春龙刘振新
Owner AEROSPACE HI TECH HLDG GROUP
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