Gravity: I2C Digital Wattmeter 數位功率計 Arduino 數位式功率感測模組

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Gravity: I2C Digital Wattmeter 數位功率計 Arduino 數位式功率感測模組

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描述

Gravity: I2C Digital Wattmeter 數位功率計 Arduino 數位式功率感測模組 支援 樹莓派 與 Arduino

Gravity: I2C Digital Wattmeter 數位功率計 是一款可測量26V 8A以內各類電子模塊、用電設備的電壓、電流和功率,最大相對誤差不超過±0.2%的高分辨、高精度、大量程測量模塊(使用前需進行一次簡單的手動校準)。可用於太陽能係統、電池庫侖計、電機、主控板或電子模塊的功耗測量、電池續航評估與實時電源參數在線監控。

Gravity: I2C Digital Wattmeter 數位功率計 採用TI INA219零溫漂電流/功率監控芯片和2W大功率低溫漂10mΩ合金采樣電阻,電壓和電流分辨率分別可達4mV與1mA,在滿量程測量條件下,電壓與電流的最大測量相對誤差不超過±0.2%,並提供4個可通過撥碼開關配置的I2C地址。模塊可對雙向高側電流(流經電源或電池正極的電流)進行準確測量,這在太陽能或庫侖計應用,電池既需要充電,也需要放電的場合尤為有用,用戶可通過電流的正負讀數了解電池的充放電狀態,也可以了解電池的衝放電的實時電壓、電流與功率。在電機應用場景,可通過實時監控電機電流是否由於堵轉或負載過大導致電流過大,從而及時採取保護措施。此外,也可以使用該模塊測量各類電子模塊或整個項目的實時功耗,從而評估電池的續航時間。

特性

  • 高精度、高分辨率、大量程、低溫漂
  • 雙向電流高側測量
  • 兼容3.3V/5V控制器
  • 精緻小巧,方便項目嵌入

應用場景

  • 太陽能係統
  • 電池庫侖計
  • 電子模塊功耗評估

技術規格

  • 供電電壓(VCC):3.3V ~ 5.5V
  • 電壓量程(IN+或IN-相對GND):0 ~ 26V
  • 電壓分辨率:4 mV
  • 電壓相對誤差:<±0.2%(典型值)
  • 電流量程:0 ~ ±8A(可測雙向電流)
  • 電流分辨率:1 mA
  • 電流相對誤差:<±0.2%(典型值,需手動校準)
  • 功率量程:0 ~ 206 W
  • 功率分辨率:20 mW(硬件)/4mW(軟件)
  • 靜態電流:0.7 mA
  • 通信接口:Gravity I2C (邏輯電平0-3.3V)
  • I2C地址:4個,0x40,0x41,0x44,0x45(默認)
  • 產品尺寸:30.0mm×22.0mm
  • 重量:4g

接口說明

Gravity: I2C Digital Wattmeter 數位功率計

Gravity:I2C數字功率計引腳說明

引腳說明
標號名稱功能描述
1VCC電源正極(3.3~5.5V)
2GND電源負極
3SCLI2C時鐘線
4SDAI2C數據線
5ADDRI2C地址選擇撥碼開關
63P TERMINAL電壓與電流測量接線柱3P

含 Arduino 範例與校正範例

Gravity: I2C Digital Wattmeter

INTRODUCTION

Gravity: I2C Digital Wattmeter is a high-resolution, high-precision, large-scale measurement module that can measure the voltage, current and power of various electronic modules and electrical equipment within 26V 8A, and the maximum relative error is no more than ±0.2% (A simple manual calibration is required before usage). It can be used for power consumption or battery life evaluation of solar energy systems, battery, motors, controller or electronic modules.

The module adopts TI INA219 zero temperature drift current/power monitoring chip and 2W high power low temperature drift 10mΩ alloy sampling resistor. The voltage and current resolution can reach 4mV and 1mA respectively. Under the full scale measurement condition, the maximum relative error of voltage and current measurement can be superior to ±0.2%. It also provides four I2C addresses that can be configured via the 2P DIP switch. The module accurately measures bi-directional high-side currents (current flowing through the power supply or battery positive), which is especially useful in solar or battery fuel gauge applications where the battery needs to be charged and discharged. This status can be simply determined by positive or negative current readings. In the motor applications, the current can be monitored in real time by monitoring whether the motor current is too large due to overload. In addition, you can use this module to measure the power consumption of various electronic modules or the entire project to evaluate battery life.

 

CONNECTION DIAGRAM

Gravity: I2C Digital Wattmeter Connection Diagram (Arduino UNO)

Gravity: I2C Digital Wattmeter Connection Diagram (Arduino UNO)

Gravity: I2C Digital Wattmeter Connection Diagram (Raspberry Pi 3B)

Gravity: I2C Digital Wattmeter Connection Diagram (Raspberry Pi 3B)

Measuring the power consumption of the Gravity: pH meter

Measuring the power consumption of the Gravity: pH meter

Monitor the power consumption of the solar panel, battery and outputs of a solar system

Monitor the power consumption of the solar panel, battery and outputs of a solar system

FEATURES

  • High precision, high resolution, large range, low temperature drift
  • Bidirectional current high side measurement
  • Compatible with 3.3V/5V controller
  • Sophisticated and compact, easy to embed in the project

APPLICATIONS

  • Solar Power Management
  • Battery Fuel Gauge
  • Electronic Module Power Evaluation

SPECIFICATION

  • Input Voltage (VCC) : 3.3V~5.5V
  • Voltage Range (IN+ or IN- relative to GND): 0 ~ 26 V
  • Voltage Resolution: 4 mV
  • Voltage Relative Error: <±0.2% (Typical)
  • Current Range: 0 ~ ±8A (Bidirectional current)
  • Current Resolution: 1mA
  • Current Relative Error: <±0.2% (Typical, manual calibration required)
  • Power Range: 0 ~ 206 W
  • Power Resolution: 20 mW (Hardware) / 4 mW (Software)
  • Quiescent Current: 0.7 mA
  • Interface: Gravity I2C (logic level: 0-3.3V)
  • I2C Address: Four options 0x40, 0x41, 0x44, 0x45
  • Dimension: 30.0mm*22.0mm/1.18*0.87 in
  • Weight: 4g

DOCUMENTS

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