CN202994889U - True RMS direct current volt ammeter - Google Patents
True RMS direct current volt ammeter Download PDFInfo
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- CN202994889U CN202994889U CN 201220707640 CN201220707640U CN202994889U CN 202994889 U CN202994889 U CN 202994889U CN 201220707640 CN201220707640 CN 201220707640 CN 201220707640 U CN201220707640 U CN 201220707640U CN 202994889 U CN202994889 U CN 202994889U
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Abstract
The utility model discloses a true RMS direct current volt ammeter, composed of a sampling module, a signal processing module, a display module, an RS485 communication module and a storage module, wherein the sampling module, the signal processing module and the RS485 communication module are successively in electrical connection; the signal processing module is meanwhile in electrical connection with the display module and the storage module. The sampling module includes a voltage signal sampling circuit and a current signal sampling circuit used for signal sampling; the signal processing module uses an STM32F103 series digital signal controller to perform analog-to-digital conversion on a sampling signal and to perform digit filtering and calibration processing. The true RMS direct current volt ammeter can rapidly collect signals and accurately measures direct current bus voltage and current of a storage battery for processing by an upper computer.
Description
Technical field
The utility model relates to a kind of real effective dc voltage and current table that is applied to the battery pack management, particularly relates to a kind of real effective dc voltage and current table that is applicable to little electrical network battery pack management.
Background technology
Battery management system is one of ingredient of micro-grid system, and major function extends the serviceable life of accumulator for improving the utilization factor of accumulator, improves the photovoltaic utilization factor of micro-grid system.The battery pack side is connected with the great power bidirectional inverter, disturbs comparatively serious.Use common volometer that accumulator is detected, have the shortcomings such as sample rate is slow, measurement result is inaccurate, thereby can not accurately estimate storage battery charge state.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of real effective dc voltage and current table that is applicable to battery pack management, can quick sampling, charging voltage and the data such as electric current, sparking voltage and electric current of Measurement accuracy battery pack.
For solving the problems of the technologies described above, technical solutions of the utility model are:
Real effective dc voltage and current table is comprised of sampling module, signal processing module, display module, RS485 communication module and memory module, wherein sampling module, signal processing module, RS485 communication module are electrically connected successively, and signal processing module is electrically connected with display module and memory module simultaneously.
Sampling module mainly is comprised of voltage signal sampling circuit and current signal sample circuit.Signal processing module uses STM32F103 series digit signal controller.
The voltage signal sampling circuit by High Precision Low Temperature float resistance, operational amplifier and related resistors, electric capacity consists of, and in order to gathering the battery pack busbar voltage, is sent to signal processing module through the signal after the voltage signal sampling circuit sampling.
The current signal sample circuit is made of shunt, operational amplifier and related resistors, electric capacity, is used for gathering the battery pack bus current, and the signal of sampling through the overcurrent signal sample circuit is sent to signal processing module.
Signal processing module by STM32F103 series digit signal controller as control core.The analog to digital conversion sampling private port of STM32F103 series digit signal controller is accepted sampling module and is transmitted and next signal, carries out analog to digital conversion in STM32F103 series digit signal controller, and the analog to digital conversion sampled result is carried out digital filtering process.
Display module is comprised of LED charactron and operation push-button.The LED charactron is the signal data display interface, can realize required keypress function by operation push-button.
The RS485 communication module is take the MAX485 transceiver as processing enter.The MAX485 transceiver is completed the communication signal transmission-receiving function according to the RS485 serial communication under the control of signal processing module.
Memory module mainly is comprised of the memory device based on the I2C-BUS serial EEPROM, follows the two-wire system agreement, is used for preserving calibration voltage, current signal data.
The utility model can the Quick Acquisition signal, and the DC bus-bar voltage of Measurement accuracy battery pack, dc bus current are processed for host computer.
Description of drawings
Below in conjunction with drawings and Examples, the utility model is further illustrated:
Fig. 1 is the structural representation of real effective dc voltage and current table.
Embodiment
According to accompanying drawing, sampling module, display module, RS485 communication module, memory module and signal processing module are electrically connected.
The DC bus-bar voltage of battery pack, dc bus current data are completed data sampling through voltage sampling circuit, the current sample electric current of sampling module respectively.After sampling was completed, sampled data was sent to signal processing module.
The analog to digital conversion sampling private port of the STM32F103 series digit signal controller in signal processing module is controlled by in house software sampled signal is carried out the signal processing, analog signal conversion is become digital signal, through carrying out digital filtering after calibration, linearization, filtered signal data sends to host computer by the RS485 bus again.
The signal that the process signal processing module is finished dealing with is sent to display module and carries out the data demonstration, can complete the selection that shows data according to the operation push-button of display module.
In calibration process, the signal of finishing dealing with through signal processing module is sent to memory module simultaneously, carries out the two-wire system agreement, storage calibration voltage, current data.
Claims (4)
1. real effective dc voltage and current table, formed by sampling module, signal processing module, display module, RS485 communication module and memory module, wherein sampling module, signal processing module, RS485 communication module are electrically connected successively, and signal processing module is electrically connected with display module and memory module simultaneously; It is characterized in that sampling module comprises voltage signal sampling circuit, current signal sample circuit; Signal processing module uses STM32F103 series digit signal controller.
2. real effective dc voltage and current table according to claim 1, it is characterized in that: the voltage signal sampling main circuit will float resistance, operational amplifier and related resistors by High Precision Low Temperature, electric capacity consists of, and voltage signal is sent to signal processing module after the voltage signal sampling circuit sampling.
3. real effective dc voltage and current table according to claim 1, it is characterized in that: the current signal sample circuit mainly is made of shunt, operational amplifier and related resistors, electric capacity, and current signal is sent to signal processing module after the sampling of current signal sample circuit.
4. a kind of real effective dc voltage and current table according to claim 1, it is characterized in that: the analog to digital conversion sampling private port of STM32F103 series digit signal controller is accepted the signal of sampling module, carry out analog to digital conversion in STM32F103 series digit signal controller, be digital signal with analog signal conversion, and the analog to digital conversion sampled result carried out digital filtering process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220707640 CN202994889U (en) | 2012-12-20 | 2012-12-20 | True RMS direct current volt ammeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220707640 CN202994889U (en) | 2012-12-20 | 2012-12-20 | True RMS direct current volt ammeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202994889U true CN202994889U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220707640 Expired - Fee Related CN202994889U (en) | 2012-12-20 | 2012-12-20 | True RMS direct current volt ammeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202994889U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285628A (en) * | 2020-09-29 | 2021-01-29 | 浙江瑞银电子有限公司 | High-reliability large-current direct current ammeter and calibration method thereof |
-
2012
- 2012-12-20 CN CN 201220707640 patent/CN202994889U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285628A (en) * | 2020-09-29 | 2021-01-29 | 浙江瑞银电子有限公司 | High-reliability large-current direct current ammeter and calibration method thereof |
| CN112285628B (en) * | 2020-09-29 | 2021-07-30 | 浙江瑞银电子有限公司 | High-reliability large-current direct current ammeter and calibration method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20171220 |