FMQJ-3教學用非平衡電橋
產(chǎn)品概述
FMQJ-3教學用非平衡電橋是一款專為高校物理實驗設計的綜合性教學儀器，集成了單臂電橋、雙臂電橋和非平衡電橋三種功能模式。該設備采用開放式結構設計，便于學生理解電橋工作原理并進行多種電路連接實驗。儀器配備高精度調(diào)節(jié)旋鈕和數(shù)字顯示模塊，可直觀觀察測量數(shù)據(jù)變化，適合開展基礎性實驗和拓展性研究項目。159
核心功能特點
該電橋支持通過橋臂切換實現(xiàn)單臂、雙臂和非平衡三種工作模式，測量范圍覆蓋1Ω至11.11MΩ（單橋）和10⁻⁶Ω至111Ω（雙橋）。非平衡模式下具備電壓和功率兩種輸出方式，調(diào)節(jié)細度達1Ω，配合外接傳感器可實現(xiàn)溫度等物理量的間接測量。獨特的多端法設計支持二端、三端和四端測量方式，有效消除引線電阻誤差，提高實驗精度。6817
教學應用價值
儀器特別適用于熱敏電阻溫度特性研究，通過橋路輸出電壓變化與電阻變化的對應關系，幫助學生深入理解非平衡電橋的測量原理。面板采用模塊化布局和可視化電路圖，清晰展示惠斯登電橋與開爾文電橋的物理模型，支持自主設計橋臂組合方案，培養(yǎng)創(chuàng)新實驗能力。配套恒壓源（0-20V）和恒流源（0.3-10mA）滿足不同實驗場景需求。71121
技術參數(shù)說明
基礎參數(shù)包含：單橋測量精度±0.2%，雙橋±1%，非平衡橋±1%；微調(diào)臂分辨率1Ω；工作溫度范圍20±15℃。結構尺寸為45×31×14cm（長×寬×高），重量約7kg。內(nèi)置標準電阻網(wǎng)絡和雙模式檢流計（電壓型/電流型），各量程可獨立選擇。加熱器和溫控儀選配件支持拓展熱學實驗。5912
Product Overview
The FMQJ-3 Teaching Unbalanced Bridge is a comprehensive educational instrument designed for university physics laboratories, integrating single-arm bridge, double-arm bridge and unbalanced bridge functionalities. Its open-frame structure facilitates hands-on learning of bridge circuit principles, while precision adjustment knobs and digital display modules enable real-time observation of measurement variations, making it ideal for both fundamental experiments and advanced research projects. 1715
Key Features
This versatile device supports mode switching among single-arm, double-arm and unbalanced configurations, with measuring ranges spanning 1Ω-11.11MΩ (single) and 10⁻⁶Ω-111Ω (double). The unbalanced mode offers voltage/power dual outputs at 1Ω resolution, compatible with external sensors for indirect physical quantity measurement. Multi-terminal measurement methods (2/3/4-wire) effectively eliminate lead resistance errors for improved accuracy. 6817
Educational Applications
Particularly effective for thermistor temperature characteristic studies, the instrument demonstrates the correlation between bridge output voltage and resistance variation, deepening students understanding of unbalanced measurement principles. The modular panel layout with visualized circuit diagrams clearly displays Wheatstone and Kelvin bridge models, encouraging innovative circuit design experiments. Built-in dual-mode galvanometers (voltage/current) and optional heating accessories expand thermal experiment possibilities. 112123
Technical Specifications
Key parameters include: ±0.2% single-bridge accuracy, ±1% double-bridge accuracy; 1Ω fine-tuning resolution; operating temperature 20±15℃. Dimensions measure 45×31×14cm (L×W×H) with 7kg weight. The integrated standard resistor network and selectable range galvanometers support flexible experimental configurations. Optional temperature control modules enable extended thermodynamics studies. 5912
FMQJ-3教學用非平衡電橋
的詳細介紹
傳感器是現(xiàn)代信息采集技術的核心，它由敏感元件和變送電路組成，非平衡電橋就是常見的重要變送電路之一。FMQJ-3型非平衡電橋可與敏感元件組成單臂橋、半橋、全橋，各橋臂均有0～100K歐姆可調(diào)旋鈕用來調(diào)定隨心所欲地設定線性區(qū)間和橋臂電流，另有一只平衡微調(diào)旋鈕用來調(diào)定數(shù)字檢流計的零點；非平衡信號由檢流計讀出或由開關一接線柱輸出機外。本品還可接成惠氏單橋或開氏雙橋進行相關的研究和測量，一橋多用，作為高教儀器物超所值；面板電路圖給出了清晰直觀的物理模型。
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| 聯(lián)接方式 |
測量范圍 |
準確度 |
尺度cm2 |
| 單橋 |
1歐姆～1111Ω |
±0.2% |
45*31*14 |
| 雙橋 |
10-6～1111Ω |
1% |
重量kg |
| 非平衡橋 |
1歐姆～11KΩ |
1% |
7 |
|
