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Motoring device for current input voltage output

A monitoring device and input voltage technology, applied in the direction of measuring current/voltage, measuring device, measuring electrical variables, etc., can solve problems such as low signal-to-noise ratio of output signal, hidden dangers of using terminal products, internal device damage, etc., and achieve stable solutions Sex and accuracy requirements, improve operational flexibility, and improve the effect of accuracy

Inactive Publication Date: 2011-08-24
张红军
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These tiny signals are easily affected by the external environment (such as electromagnetic field, temperature, etc.) during use, resulting in damage to internal devices or a low signal-to-noise ratio of the output signal, which brings huge hidden dangers to the application of end products

Method used

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  • Motoring device for current input voltage output
  • Motoring device for current input voltage output
  • Motoring device for current input voltage output

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0033] see figure 1 As shown, the monitoring device of the current input voltage output of the present invention is installed in the use terminal and can output 4~20mA analog current signal I 电流 between the devices. The monitoring device can protect the terminal from being damaged due to the voltage exceeding the applicable range.

[0034] see Figure 1A As shown, the monitoring device for current input and voltage output of the present invention includes a casing and a circuit board installed in the casing. On the upper panel of the housing, there are current interface J3, voltage interface J2 and alarm interface J6, on the right panel of the housing there is a power interface J1, on the front panel of the housing there is an LCD display and a keyboard (on the keyboard) There are 0-9 numbers, and commonly used keys such as OK, Cancel, etc.). The LCD dis...

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PUM

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Abstract

The present invention discloses a monitoring device for current input voltage output. The monitoring device comprises a casing and a circuit board installed in the casing. The upper panel of casing is provided with a current interface (J3), a voltage interface (J2) and an alarming interface (J6). The right panel of casing is provided with a power supply interface (J1). The front panel of casing is provided with an LED display screen and a keyboard. The circuit board comprises a central processing unit, an analog-to-digital conversion module, a digital-to-analog conversion module, an alarming output module, a keyboard and an alarming output module. The monitoring device adopts executing differential demodulation to the received digital voltage signal Vin for obtaining an operating voltage Vout with 12-bit binary value. The operating voltage Vout is taken as the input voltage of current conversion on one hand, and on the other hand the operating voltage Vout is compared with a voltage threshold value Pin for obtaining the alarming voltage thereby realizing the functions of prewarning and protecting to the damage caused by the overvoltage of terminal.

Description

technical field [0001] The invention relates to a device for protecting the application voltage of end products. More specifically, it refers to a kind of analog current I that can input 4 ~ 20mA 电流 Convert to 0~5V analog voltage V 电压 output, and the analog voltage V that does not meet the condition output 电压 A monitoring device that issues an alarm. Background technique [0002] For end products, using a power supply device with stable performance can fully protect its service life. The terminals used can be portable devices (such as mobile phones, PDAS, GPRS, game consoles), telecommunications / network equipment (such as routers, servers, VOIP systems), consumer electronics, medical systems, navigation systems, etc. Most of these industrial equipment are based on 0-5V voltage, and the circuit contains a large number of 4-20mA current signals. These tiny signals are easily affected by the external environment (such as electromagnetic field, temperature, etc.) during use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/165G01R19/25
Inventor 龙剑
Owner 张红军
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