Multi Component Sensors

Up to six forces and moments on three axes (x, y, z) can be measured with a multi-axis sensor. It is ideally suited for mechanical engineering usage, test benches, and also in research and development.

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A multi-axis sensor is a force transducer equipped with up to six galvanically isolated measurement bridges. It measures forces along three directions, each orientated 90° to the others. In each direction, it is also possible to measure the corresponding bending moments.

Multi-axis sensors can measure in up to three axes. In each direction, both a force and a bending moment can be measured, which means a maximum of six output channels is possible with a multi axis sensor. With HBK, you can configure your sensor according to your measurement task – anything between two and six channels is available.

These sensors operate with strain gauges arranged in a Wheatstone bridge. As a result, the output is an mV/V signal, and the bridges must be supplied with an excitation voltage. You can use any amplifier designed for strain gauge bridges, such as the PMX or QuantumX models form HBK.

There are quite compact sensors on the market designed for applications with low measurement values. For example, the MCS10-002 offers force capacities of 2 kN in the Z- direction and just 500 N in X- and Y-directions. Its height is no more than 45 mm, and its diameter is only 68 mm. Sensors of this size are often used in wind-tunnel applications or haptic tests.

At the other end of the spectrum, multi axis sensors in the meganewton range are available as customised solutions.

HBK uses flanges on both sides of the sensor. A centering aid and a positioning pin ensure that MCS transducers can be mounted easily and in the correct orientation.

It is important to follow the instructions in the manual: the hardness of the parts in contact with the sensor must be appropriate, and the torque applied to the screws must comply with the specified values.

If the direction of the force is clearly defined – for example, press forces – then a uniaxial force sensor is sufficient. However, if you need to measure forces in different directions – such as in wind-tunnel tests, where both lift and drag forces must be captured – a multi-axis sensor is required.

Multi-axis sensors are also the right choice when the direction of the maximum force is unknown.

You can use individual single-axis sensors for each direction. This approach is mechanically more complex and more expensive but it is also more precise.

Medical robotics makes extensive use of multi-axis sensors. These sensors support advancements in surgical procedures, medical training, and rehabilitation.

There are also many mechanical tests that require a multi-axis sensing – for example, helmet verification tests. The assembly of aircraft is also controlled by force measurements from multi-axis sensors.

When a load is applied in only one direction and an output appears on the other axes, this is referred to as crosstalk between channels. Crosstalk levels are included in the technical specifications for multi‑axis sensors and are given as a percentage of the channel output. HBK has optimised the cross talk to a minimum by careful mechanical design.

Non-linearity is the maximum deviation of the calibration curve from a straight line drawn between no-load and full scale, expressed as a percentage of full scale and measured with an increasing load.

Hysteresis is the maximum difference between the transducer output readings for the same applied load. One reading is taken while increasing the load from zero, and the other while decreasing the load from the rated output. Hysteresis is usually measured at half the rated output.

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Multi Component Sensors

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FAQs

What is a multi-axis sensor?

How many output signals do I get from a multi-axis sensor?

What types of output can be expected?

What choices are available in terms of size and capacity?

How are multi-axis sensors mounted?

Which applications measure forces in more than one axis?

When should you use a multi-axis sensor instead of multiple single-axis sensors?

Which medical applications require multi-axis sensors?

What is crosstalk in multi-axis sensors?

How is nonlinearity defined for multiaxis sensors?

What is multi-axis sensor hysteresis?

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