行业组件数据 · 2026

应变片电桥

A strain gauge bridge is a Wheatstone bridge circuit configuration used to measure mechanical strain by converting it into an electrical signal.

技术定义与适配语境
典型 应变片电桥 会按材料、尺寸公差、适配关系和失效风险在 机械和设备制造 中评估。

A strain gauge bridge is a precision measurement circuit consisting of four strain gauges arranged in a Wheatstone bridge configuration. It is a critical component in tension sensors (load cells/dancer systems) that converts mechanical deformation caused by applied force into proportional electrical resistance changes. The bridge configuration provides temperature compensation, improved sensitivity, and reduced measurement errors compared to single strain gauge setups.

组件规格

定义
A strain gauge bridge is a precision measurement circuit consisting of four strain gauges arranged in a Wheatstone bridge configuration. It is a critical component in tension sensors (load cells/dancer systems) that converts mechanical deformation caused by applied force into proportional electrical resistance changes. The bridge configuration provides temperature compensation, improved sensitivity, and reduced measurement errors compared to single strain gauge setups.
工作原理
The strain gauge bridge operates on the Wheatstone bridge principle where four strain gauges (two in tension and two in compression) are arranged in a balanced circuit. When mechanical strain is applied, the resistance of the gauges changes proportionally, creating an imbalance in the bridge. This imbalance produces a differential output voltage that is proportional to the applied strain, which can be amplified and measured to determine the force or tension.
材料
Constantan or Karma alloy foil (typically 3-6μm thick) on polyimide substratecopper or gold lead wiresepoxy encapsulationstainless steel or aluminum carrier for mounting
Creep
<0.05% FS/30min
Accuracy
±0.1% to ±0.5% FS
Resistance
120Ω, 350Ω, or 1000Ω
Gauge Factor
2.0-2.2
Temperature Range
-30°C to +80°C
Excitation Voltage
5-15V DC
Output Sensitivity
1-3 mV/V
Bridge Configuration
Full-bridge, half-bridge, or quarter-bridge
标准
ISO 376DIN 51221ASTM E251

行业分类与别名

应变片电桥 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Overload beyond rated capacity->Permanent deformation or fracture of strain gauge elements->Install overload protection devices, implement force limit controls, use gauges with higher safety factors
Moisture penetration through encapsulation->Electrical short circuits and measurement drift->Use hermetic sealing, apply conformal coatings, maintain controlled environment
Fatigue from cyclic loading->Crack propagation in gauge foil leading to open circuit->Design for proper stress distribution, use fatigue-resistant materials, implement load monitoring

工业生态与工程逻辑

0
Bridge imbalance due to gauge damage
1
Temperature drift affecting accuracy
2
Moisture ingress causing short circuits
3
Fatigue failure from cyclic loading
4
Electromagnetic interference on signal

合规与检测

tolerance
±0.1% to ±0.5% of full scale depending on accuracy class
test method
Deadweight calibration, shunt calibration, comparison against reference standards per ISO 376

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采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the difference between full-bridge and half-bridge strain gauge configurations?

A full-bridge uses four active strain gauges (two in tension, two in compression) for maximum sensitivity and temperature compensation. A half-bridge uses two active gauges and two fixed resistors, offering lower sensitivity but simpler implementation.

How does temperature affect strain gauge bridge measurements?

Temperature changes cause resistance variations in strain gauges. The bridge configuration compensates for this by using gauges with matched temperature coefficients and arranging them so temperature effects cancel out in the differential output.

What maintenance is required for strain gauge bridges?

Regular calibration checks, inspection for physical damage or moisture ingress, verification of electrical connections, and monitoring of zero drift are essential maintenance activities.

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URN:CNFX:ME:UNIT:STRAIN_GAUGE_BRIDGE