CN208752126U - A kind of voltage monitoring instrument of wide scope measurement - Google Patents
A kind of voltage monitoring instrument of wide scope measurement Download PDFInfo
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- CN208752126U CN208752126U CN201820468763.2U CN201820468763U CN208752126U CN 208752126 U CN208752126 U CN 208752126U CN 201820468763 U CN201820468763 U CN 201820468763U CN 208752126 U CN208752126 U CN 208752126U
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- power supply
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Abstract
The utility model is specifically related to a kind of voltage monitoring instrument of wide scope measurement, including power-supply system, sampling module, core processing module, maintenance interface module, communication interface module and human-machine interface module；It is characterized by: the power module includes primary power source and secondary power supply；The primary power source is Switching Power Supply, exports 4.45V voltage and 5.0V voltage respectively；4.45V voltage output end is connected with the input terminal of secondary power supply；4.45V voltage output end is electrically connected with communication interface module to be powered；5.0V voltage is connected with interface module to be powered；The secondary power supply includes LDO power supply processing chip, is inputted through direct current 4.25, and 3.3V output is electrically connected with human-machine interface module and is powered for core processing module, sampling module.The power supply of the voltage monitoring instrument of the utility model can support the voltage input of gamut, that is, 60V ~ 494V, and in the input range, power supply works normally and meets the requirement that complete machine corresponds to power consumption (≤5VA).
Description
Technical field
The utility model relates to power quality fields, and in particular to a kind of voltage monitoring instrument of wide scope measurement.
Background technique
Voltage monitoring instrument is for monitoring ABCD class supply voltage quality, and there are two types of voltage signal access ways, one is
It is accessed indirectly by voltage transformer, monitoring voltage 100V, another kind is to be directly accessed, and monitoring voltage is 220V and 380V.
It is 60 ~ 130%Un according to each voltage class measurement range of DL/T 500-2017 standard requirements.In conjunction with use above scene and its
Measurement range requirement of the professional standard to voltage monitoring instrument, proposes a kind of voltage monitoring instrument of wide scope measurement, voltage monitoring instrument
Support while monitoring the voltage measurement of tri- voltage class gamuts of 100V, 220V, 380V.To reach the target, need to meet with
Lower requirement:
(1) power supply of voltage monitoring instrument can support the voltage input of gamut, that is, 60V ~ 494V, defeated at this
Enter in range, power supply works normally and meets the requirement that complete machine corresponds to power consumption (≤5VA)；
(2) the measurement input of voltage monitoring instrument can support the voltage input of gamut, and meet voltage measurement error
≤ 0.5% requirement.
Summary of the invention
1, technical problem to be solved:
In order to overcome the shortcomings of the prior art, the utility model proposes a kind of voltage monitorings of wide scope measurement
Instrument by taking two-way power supply to be powered respectively to the different piece of voltage monitoring instrument, and realizes the voltage to gamut
Input.
2, technical solution:
A kind of voltage monitoring instrument of wide scope measurement, including power-supply system, sampling module, core processing module, maintenance connect
Mouth mold block, communication interface module and human-machine interface module；It is characterized by: the power module includes primary power source and second level electricity
Source；The primary power source is Switching Power Supply, exports 4.45V voltage and 5.0V voltage respectively；4.45V voltage output end and second level electricity
The input terminal in source is connected；4.45V voltage output end is electrically connected with communication interface module to be powered；5.0V voltage and interface module
It is connected and is powered；The secondary power supply includes LDO power supply processing chip, is inputted through direct current 4.25, and 3.3V output is at core
Reason module, sampling module are electrically connected with human-machine interface module and are powered.
Further, the core processing module be NXP1778 processor, the NXP1778 processor respectively with sampling
Module, maintenance interface module, human-machine interface module are connected with communication interface module.
Further, the LDO power supply processing chip is SP6025.
3, the utility model has the advantages that
(1) power supply of the voltage monitoring instrument of the utility model can support the voltage input of gamut, that is, 60V
~ 494V, in the input range, power supply works normally and meets the requirement that complete machine corresponds to power consumption (≤5VA)；
(2) the measurement input of the voltage monitoring instrument of the utility model can support the voltage input of gamut, and meet
The requirement of voltage measurement error≤0.5%.
Detailed description of the invention
The structure chart of Fig. 1 the utility model；
Fig. 2 is the circuit diagram of primary power source in the utility model.
Specific embodiment
A kind of voltage monitoring instrument of wide scope measurement as shown in Fig. 1, including at power-supply system, sampling module, core
Manage module, maintenance interface module, communication interface module and human-machine interface module；It is characterized by: the power module includes one
Level power supply and secondary power supply；The primary power source is Switching Power Supply, exports 4.45V voltage and 5.0V voltage respectively；4.45V voltage
Output end is connected with the input terminal of secondary power supply；4.45V voltage output end is electrically connected with communication interface module to be powered；5.0V
Voltage is connected with interface module to be powered；The secondary power supply includes LDO power supply processing chip, is inputted through direct current 4.25,
3.3V output, is electrically connected with human-machine interface module and is powered for core processing module, sampling module.The power-supply system is divided into
Primary power source and secondary power supply, primary power source as shown in Figure 2 use Switching Power Supply, and exchange 60 ~ 494V power input is converted into two
Road direct current output, 4.25V is for the input of secondary power supply and its power voltage supply of GPRS module all the way, and another way 5.0V is for tieing up
The power supply power supply of interface module is protected, transfer efficiency requires 90% or more；Secondary power supply uses LDO power supply processing chip, through direct current
4.25 outputs, 3.3V output, the power supply of the main chips such as system CPU, SRAM, FLASH.By reasonably planning power supply electricity at different levels
Source can be effectively reduced power consumption.
Although the present invention has been described by way of example and in terms of the preferred embodiments, they be not it is for the purpose of limiting the invention, it is any ripe
This those skilled in the art is practised, without departing from the spirit and scope of the invention, can make various changes or retouch from working as, therefore guarantor of the invention
Shield range should be subject to what claims hereof protection scope was defined.
Claims (3)
1. a kind of voltage monitoring instrument of wide scope measurement, including power module, sampling module, core processing module, maintenance interface
Module, communication interface module and human-machine interface module；It is characterized by: the power module includes primary power source and second level electricity
Source；The primary power source is Switching Power Supply, exports 4.45V voltage and 5.0V voltage respectively；4.45V voltage output end and second level electricity
The input terminal in source is connected；4.45V voltage output end is electrically connected with communication interface module to be powered；5.0V voltage and interface module
It is connected and is powered；The secondary power supply includes LDO power supply processing chip, is inputted through direct current 4.45V, and 3.3V output is core
Processing module, sampling module are electrically connected with human-machine interface module and are powered.
2. a kind of voltage monitoring instrument of wide scope measurement according to claim 1, it is characterised in that: the core processing mould
Block be NXP1778 processor, the NXP1778 processor respectively with sampling module, maintenance interface module, human-machine interface module with
Communication interface module is connected.
3. a kind of voltage monitoring instrument of wide scope measurement according to claim 1, it is characterised in that: LDO power supply processing core
Piece is SP6025.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820468763.2U CN208752126U (en) | 2018-03-30 | 2018-03-30 | A kind of voltage monitoring instrument of wide scope measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820468763.2U CN208752126U (en) | 2018-03-30 | 2018-03-30 | A kind of voltage monitoring instrument of wide scope measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208752126U true CN208752126U (en) | 2019-04-16 |
Family
ID=66051595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820468763.2U Active CN208752126U (en) | 2018-03-30 | 2018-03-30 | A kind of voltage monitoring instrument of wide scope measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208752126U (en) |
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2018
- 2018-03-30 CN CN201820468763.2U patent/CN208752126U/en active Active
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