CN210839068U - Distribution automation terminal - Google Patents
Distribution automation terminal Download PDFInfo
- Publication number
- CN210839068U CN210839068U CN201921599564.6U CN201921599564U CN210839068U CN 210839068 U CN210839068 U CN 210839068U CN 201921599564 U CN201921599564 U CN 201921599564U CN 210839068 U CN210839068 U CN 210839068U
- Authority
- CN
- China
- Prior art keywords
- sampling
- analog
- processing module
- core processing
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a distribution automation terminal, which comprises an MCU core processing module, an AD sampling module and an analog change-over switch; the MCU core processing module is electrically connected with the analog change-over switch and is used for outputting a level signal to the analog change-over switch so as to drive the analog change-over switch to switch over a sampling link; the analog switch is electrically connected with the AD sampling module and used for sending the analog signal of the selected sampling link to the AD sampling module; the AD sampling module is electrically connected with the MCU core processing module and is used for converting analog signals into digital signals and sending the digital signals to the MCU core processing module. Adopt the utility model discloses, can realize analog signal's effective collection under the prerequisite of guaranteeing lower hardware cost.
Description
Technical Field
The utility model relates to a smart power grids technical field especially relates to a distribution automation terminal.
Background
With the advance of smart power grid construction and the continuous deepening of distribution network automation construction, the number and the types of signals monitored by each electrical monitoring point are gradually increased. Accordingly, at least 10 analog signals of double-side voltage and 7 analog signals of current need to be monitored at one current monitoring point.
Due to the characteristics of the working location, the distribution automation terminal is used as a core element in the power distribution automation system, the monitored analog signal amount is often large, and generally, the distribution automation terminal needs to monitor 4 paths of voltage and 7 paths of current analog signals. Therefore, the distribution automation terminal must have a multi-channel analog signal acquisition function.
At present, the design analog input channel of the AD sampling chip is mostly 2, 4, 8 ways of modes, so the sampling function of all analog input signals can not be accomplished in the direct access of monolithic AD sampling chip, consequently, each producer is to realizing that distribution automation terminal gathers multichannel electrical analog signal input, generally adopts the multichip solution.
As shown in fig. 1, in the multi-chip solution, according to the maximum number of analog signal acquisitions, a terminal hardware platform configures a plurality of AD analog conversion chips to realize continuous tracking of analog signals, and acquires all analog input signals in one turn. Although the multiple AD sampling chips ensure the continuous tracking of analog signal input, and the data acquisition of all input analog signals can be completed by starting sampling once, the multiple AD sampling devices inevitably improve the economic cost of the whole hardware platform.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a simple structure, low-cost distribution automation terminal is provided, analog signal's effective collection can be realized.
In order to solve the technical problem, the utility model provides a distribution automation terminal, include: the system comprises an MCU core processing module, an AD sampling module and an analog change-over switch; the MCU core processing module is electrically connected with the analog change-over switch and is used for outputting a level signal to the analog change-over switch so as to drive the analog change-over switch to switch over a sampling link; the analog switch is electrically connected with the AD sampling module and used for sending the analog signal of the selected sampling link to the AD sampling module; the AD sampling module is electrically connected with the MCU core processing module and is used for converting analog signals into digital signals and sending the digital signals to the MCU core processing module.
As an improvement of the above scheme, the analog switch is connected to at least two groups of sampling links.
As an improvement of the above scheme, the interrupt frequency of the MCU core processing module is N times of the sampling frequency required by the MCU core processing module for data analysis, where N is the number of groups of sampling links connected to the analog switch.
As an improvement of the scheme, the MCU core processing module is electrically connected with the AD sampling module through a data communication bus.
As an improvement of the scheme, the MCU core processing module comprises an MCU chip and an MCU peripheral circuit.
As an improvement of the scheme, the model of the MCU chip is STM32F103RBT 6.
As an improvement of the scheme, the AD sampling module comprises an AD sampling chip and an AD peripheral circuit.
As an improvement of the scheme, the model of the AD sampling chip is AD 7606.
As an improvement of the scheme, the analog change-over switch is a three-channel single-pole double-throw switch.
Implement the utility model has the advantages that:
the invention adopts a mode of 'single MCU core processing module + single AD sampling module + single analog switch' and combines the grouping sampling of analog signals, thereby ensuring that the analog signal sampling effect of a plurality of AD sampling modules is achieved on the premise of lower hardware cost, and further improving the cost performance of products.
Drawings
FIG. 1 is a detailed structure of a conventional multi-chip solution;
fig. 2 is a schematic structural diagram of the distribution automation terminal of the present invention;
fig. 3 is a schematic circuit diagram of the distribution automation terminal of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 2, fig. 2 shows the utility model discloses distribution automation terminal's concrete structure, it includes MCU core processing module 1, AD sampling module 2 and simulation change over switch 3, specifically:
the MCU core processing module 1 is electrically connected with the analog change-over switch 3, and the MCU core processing module 1 is used for outputting level signals to the analog change-over switch 3 to drive the analog change-over switch 3 to switch over a sampling link.
The analog switch 3 is electrically connected with the AD sampling module 2, and the analog switch 3 is used for sending the analog signal of the selected sampling link to the AD sampling module 2.
The AD sampling module 2 is electrically connected with the MCU core processing module 1, and the AD sampling module 2 is used for converting an analog signal into a digital signal and sending the digital signal to the MCU core processing module 1; preferably, the MCU core processing module 1 and the AD sampling module 2 are electrically connected through a data communication bus.
When the terminal is powered on and started to operate, the MCU core processing module 1 firstly outputs a low level signal to the analog change-over switch 3, after the analog change-over switch 3 receives the low level signal, the analog change-over switch 3 is switched to the first group of sampling links and drives the first group of sampling links to input the analog signal into the AD sampling module 2, and after the switching is completed, the MCU core processing module 1 enters a normal working flow; when the sampling timing moment is reached, the MCU core processing module 1 starts interruption and drives the AD sampling module 2 to execute first sampling; after the first sampling is finished, the MCU core processing module 1 outputs a high level signal to the analog change-over switch 3 again, after the analog change-over switch 3 receives the high level signal, the analog change-over switch 3 is switched to the second group of sampling links and drives the second group of sampling links to input the analog signal into the AD sampling module 2, and after the switching is finished, the MCU core processing module 1 exits from the interruption; when the sampling timing moment arrives again, the MCU core processing module 1 starts interruption and drives the AD sampling module 2 to execute second sampling; after the second sampling is completed, the MCU core processing module 1 outputs a low level signal to the analog change-over switch 3, and so on, the sampling is continuously and circularly performed.
It should be noted that the MCU core processing module 1 may preset the generation frequency of the interrupt signal according to the actual situation, and when the MCU core processing module 1 generates the interrupt signal, the AD sampling module 2 performs sampling. Therefore, the utility model discloses in, the usable MCU core processing module 1 of analog switch 3 withdraws from the interrupt and starts the interval waiting signal between the interrupt stable, simultaneously, MCU core processing module 1 also can utilize to withdraw from the interrupt and start the interval between the interrupt to carry out other orders and do not need the original place to carry out empty order to whole software system's work efficiency has been improved. The interruption time is the sampling of the analog signal and the switching time of the sampling module.
Preferably, the interrupt frequency of the MCU core processing module 1 is N times of the sampling frequency required by the MCU core processing module 1 for data analysis, where N is the number of groups of sampling links connected to the analog switch 3. For example, if the analog signal needs to have a sampling frequency of 1200 times/second and two sets of sampling links are connected to the analog switch 3, the interrupt frequency is 2400 times/second.
As shown in fig. 3, the MCU core processing module 1 includes an MCU chip U2 and an MCU peripheral circuit, wherein the model of the MCU chip U2 is STM32F103RBT6, but not limited thereto.
The AD sampling module 2 includes an AD sampling chip U3 and an AD peripheral circuit, wherein the model of the AD sampling chip U3 is AD7606, but not limited thereto.
The analog switch U1 is connected to at least two sampling links, and the analog switch U1 can flexibly switch the sampling links through high/low level signals output by the MCU core processing module 1. Specifically, the analog switch U1 may be a three-channel single-pole double-throw switch, and flexible switching between two sets of sampling links may be flexibly implemented by the three-channel single-pole double-throw switch, so that the practicability is high.
Therefore, the invention adopts the mode of 'single MCU core processing module + single AD sampling module + single analog change-over switch' and combines the grouping sampling of analog signals, thereby ensuring that the analog signal sampling effect of a plurality of AD sampling modules is achieved on the premise of lower hardware cost, and further improving the cost performance of the product.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and decorations can be made without departing from the principle of the invention, and these modifications and decorations are also regarded as the protection scope of the present invention.
Claims (9)
1. A distribution automation terminal is characterized by comprising an MCU core processing module, an AD sampling module and an analog change-over switch;
the MCU core processing module is electrically connected with the analog change-over switch and is used for outputting a level signal to the analog change-over switch so as to drive the analog change-over switch to switch over a sampling link;
the analog switch is electrically connected with the AD sampling module and used for sending the analog signal of the selected sampling link to the AD sampling module;
the AD sampling module is electrically connected with the MCU core processing module and is used for converting analog signals into digital signals and sending the digital signals to the MCU core processing module.
2. The distribution automation terminal of claim 1 wherein the analog switch connects at least two sets of sampling links.
3. The distribution automation terminal of claim 1 wherein the interrupt frequency of the MCU core processing module is N times the sampling frequency required for data analysis by the MCU core processing module, where N is the number of groups of sampling links to which the analog switches are connected.
4. The distribution automation terminal of claim 1 wherein the MCU core processing module and the AD sampling module are electrically connected via a data communication bus.
5. The distribution automation terminal of claim 1 wherein the MCU core processing module comprises an MCU chip and MCU peripheral circuits.
6. The distribution automation terminal of claim 5 wherein the MCU chip is model STM32F103RBT 6.
7. The distribution automation terminal of claim 1 wherein the AD sampling module includes an AD sampling chip and AD peripheral circuitry.
8. The distribution automation terminal of claim 7 wherein the model number of the AD sampling chip is AD 7606.
9. The distribution automation terminal of claim 1 wherein the analog diverter switch is a three-channel single pole double throw switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921599564.6U CN210839068U (en) | 2019-09-24 | 2019-09-24 | Distribution automation terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921599564.6U CN210839068U (en) | 2019-09-24 | 2019-09-24 | Distribution automation terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210839068U true CN210839068U (en) | 2020-06-23 |
Family
ID=71261805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921599564.6U Active CN210839068U (en) | 2019-09-24 | 2019-09-24 | Distribution automation terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210839068U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115290969A (en) * | 2022-10-08 | 2022-11-04 | 成都通用整流电器研究所 | Intelligent power distribution multi-analog sampling device |
-
2019
- 2019-09-24 CN CN201921599564.6U patent/CN210839068U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115290969A (en) * | 2022-10-08 | 2022-11-04 | 成都通用整流电器研究所 | Intelligent power distribution multi-analog sampling device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102403880B (en) | Control system of chain type current transformer | |
| CN107169244B (en) | Electromechanical-electromagnetic transient hybrid simulation interface system and method | |
| CN108963995B (en) | Regional differential protection device and method for power distribution network to react to phase-to-phase fault | |
| CN102075104A (en) | Converting device with multiple input terminals and two output terminals and photovoltaic system employing the same | |
| CN106527272B (en) | Universal control system for power electronics | |
| CN210839068U (en) | Distribution automation terminal | |
| CN101800442B (en) | Intelligent transformer substation voltage switching and paralleling method and device | |
| CN110824977B (en) | Signal sampling method, MCU core processing module and power distribution automation terminal | |
| CN103812576A (en) | Comprehensive system of self-adapting anti-interference antenna channel | |
| CN203720258U (en) | Voltage and current transient signal high-speed synchronous data sampling device | |
| CN201904776U (en) | Multi-channel ADC synchronous sampling/processing circuit | |
| CN111190048A (en) | Multichannel lightning current information acquisition board card | |
| CN210427662U (en) | Distribution line loss acquisition module | |
| CN102097790B (en) | Method for realizing point-to-point distributed bus protection by adopting multi-level cascading | |
| CN201994043U (en) | Multipath RS-232 interface circuit of LED display screen | |
| CN211264148U (en) | Novel array ADC gathers synchronous device | |
| CN204495901U (en) | A kind of batteries of electric automobile group monomer voltage acquisition system | |
| CN204103751U (en) | A kind of Drive Structure adding the three-level current transformer of CPLD based on many DSP | |
| CN201069524Y (en) | A multi-channel separated data collection device | |
| CN207968066U (en) | A kind of control system based on high speed silicon carbide static switch | |
| CN101604474B (en) | Time-division multiplexing alternating current sampling method for digital substation based on VLAN technology | |
| CN206440964U (en) | A kind of photovoltaic DC-to-AC converter two CSTR controller | |
| CN202352060U (en) | Active 485 meter reading circuit for concentrator | |
| CN218498872U (en) | DTU data acquisition system | |
| CN214900202U (en) | Power load regulation and control system combined with switch conversion device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |