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Apparatus for detecting multiplex fuse wire signal

A fuse signal and signal technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of weak anti-interference ability, small signal-to-noise ratio, and large blind area.

Active Publication Date: 2011-07-27
EMERSON NETWORK POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Three power sources are required
[0006] 2. The signal-to-noise ratio is small and the anti-interference ability is weak
[0007] 3. The ratio of the useful signal to the useless signal in the output signal is too small
[0008] 4. The blind area that cannot be detected is large
[0009] 5. When the battery is not connected, the input fuse is broken and cannot be detected

Method used

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  • Apparatus for detecting multiplex fuse wire signal
  • Apparatus for detecting multiplex fuse wire signal
  • Apparatus for detecting multiplex fuse wire signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First, the circuit is described, such as figure 2 As shown, the first and second divider resistors R1 and R2 are used to proportionally distribute the input signal; the resistor R4 is the first pull-up resistor to make the input signal compatible with positive and negative inputs; diode D1 (including the first diode D1- 1 and the second diode D1-2) are used for clipping or bypassing the useless components in the input signal. At the same time, the first diode D1 can enhance the anti-interference ability of the input signal and filter out the positive and negative directions. Electromagnetic interference (such as surge, static electricity, lightning strike, etc.); resistor R5 and capacitor C1 form a low-pass filter to filter high-frequency noise in the signal.

[0022] in such as figure 2 In the detection device shown, the input useful signal of the fuse can not be greatly attenuated. For example, when the input useful signal is ±1V, we can only intercept ±10V (this r...

Embodiment 2

[0028] When the input signal is good, the circuit of Embodiment 1 can be further simplified as image 3 circuit shown. can even be image 3 The middle resistor R5 is also omitted.

Embodiment 3

[0030] For traditional circuits, we can also optimize, such as Figure 4 As shown, its working process is as follows: first, the input signal is attenuated and sampled through the voltage dividing circuit composed of voltage dividing resistors R1 and R2, and then the voltage is stabilized through the emitter follower, and then the first and second diodes D1-1, D1 are used to The clamping circuit composed of -2 and the positive power supply +VCC1 of the non-inverting input terminal of the emitter follower limits the range of the output signal within a predetermined range. Finally, it is filtered by the filter circuit composed of the resistor R5 and the capacitor C1 and passed through the second The reference power supply VREF' and the second pull-up resistor R6 are pulled up and then output.

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PUM

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Abstract

The invention relates to a device used for detecting multipath fuse wire signals, comprising an attenuation sampling circuit used for carrying out attenuation sampling toward input signals and also a clamp circuit connected with the attenuation sampling circuit and used for limiting the signal received from the sampling circuit within a preset range and outputting the signal. The device has no blind detection area, has strong anti-interference capacity and can be applicable to a situation without a storage battery connected.

Description

technical field [0001] The invention relates to a detection device, in particular to a device for detecting multi-channel battery fuse signals in a communication power supply system or a solar energy system. Background technique [0002] In the communication power supply system or solar energy system, the on-off detection of the battery fuse is generally based on the case of two or more fuses. At present, the main detection circuits are as follows: figure 1 shown. Let's take a 48V communication power system or a solar system as an example. When there are two fuses that need on-off detection, since the highest average charging voltage of the battery is about 57V, the voltage difference between the two batteries may be ±57V. At the same time, it is the fuse detection input terminal ( figure 1 middle FUSE terminal) input voltage range, this input voltage is attenuated by 20 times through the first and second voltage divider resistors R1 and R2, this is because the latter anal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/02
Inventor 吴连日
Owner EMERSON NETWORK POWER CO LTD