What is a torque sensor?

Hi everyone,

A torque sensor, also known as a torque transducer or torque meter, is a device that measures the torque exerted on a rotating system, such as a shaft, gear, or motor. Torque is a force that tends to rotate objects around an axis, fulcrum, or pivot and is measured in Newton-meters (Nm) or foot-pounds (ft-lb) in the Imperial system.

Load %

0.0 Nm

Components:

Typically, a torque sensor consists of the following components:

    Strain Gauges: These are used to detect the amount of deformation or strain in the object to which torque is applied.
    Shaft: The central component that experiences the torque.
    Transducer Element: Converts mechanical deformation into an electrical signal.
    Signal Conditioning Electronics: Process the electrical signal to produce a readable output.

Working Principle:

    Deformation Measurement: When torque is applied to the shaft, it causes the shaft to twist or deform. This deformation is proportional to the applied torque.
    Strain Gauge Response: The strain gauges are attached to the shaft and deform along with it. This deformation changes the electrical resistance of the strain gauges.
    Signal Conversion: The change in resistance is converted into an electrical signal by the transducer element.
    Signal Processing: The electrical signal is then conditioned and processed to produce a readable output, typically in the form of a voltage, current, or digital signal, representing the amount of torque applied.

Types of Torque Sensors:

    Reaction Torque Sensors: Measure static torque, and they remain stationary while torque is applied.
    Rotary Torque Sensors: Measure dynamic torque in rotating shafts.
    Surface Acoustic Wave (SAW) Torque Sensors: Utilize the wave properties of ultrasonic waves to measure torque.
    Optical Torque Sensors: Use light to measure torque, typically by analyzing the polarization change of light passing through a stressed optical material.

Applications:

Torque sensors are used in a variety of applications, including:

    Automotive Industry: To measure engine torque and calibrate torque in steering systems.
    Industrial Manufacturing: To monitor torque in machinery and maintain quality control.
    Aerospace: To measure the torque in aircraft components.
    Medical Equipment: To monitor torque in medical devices like surgical tools.
    Consumer Electronics: In devices like computer hard drives to monitor the torque applied to the spindle motor.

Advantages:

    Precision: Provides accurate and precise measurements of torque.
    Versatility: Can be used in various applications and environments.
    Real-time Monitoring: Allows for continuous monitoring of torque in real-time.

Limitations:

    Cost: High-quality torque sensors can be expensive.
    Calibration: Requires regular calibration to maintain accuracy.
    Installation Constraints: Some types may have specific installation requirements to function correctly.

In summary, a torque sensor is a crucial device in various fields for measuring and monitoring the torque applied to rotating systems, ensuring optimal performance and safety in numerous applications.

"Torque and motors that produce torque are present in every aspect of our lives, whether in electrical or mechanical forms. We've tried to answer the most frequently asked questions about the torque capacities of electric motors below.

- What is torque motor?

- What is torque?

- What is torque boosting?

- What is torque control?

- What is the difference between torque and power?

- How is torque measured?

- What are the units of torque?

- Why is torque important when selecting a motor?

- What advantages does a high-torque motor provide?

- What disadvantages does a low-torque motor bring?

- How is a balance between torque and speed achieved?

- What is the relationship between torque and horsepower in cars?

- What is a torque curve?

- Why do electric vehicles generally produce high torque?

- How can torque be increased?

- What is the effect of torque on mechanical systems?

- What is the relationship between torque and rotational speed?

- How are motors categorized based on their torque-producing capacity?

- What types of motors produce high torque?

- How is torque control achieved?

- What is a torque multiplier and how is it used?