DataLITE Wireless Sensors & Systems
DataLITE systems range from a single goniometer or EMG sensor to comprehensive systems of multiple sensor types which can be configured to suit end user requirements.
DataLITE Wireless Sensors
Single-axis Torsiometers are designed for measurement of rotations in one plane e.g. forearm pronation/supination or neck axial rotation. If the Torsiometer is bent in planes X-X or Y-Y the output remains constant. All Torsiometers function in the same way, the difference being physical size.
In general, there are no fixed rules governing which size of sensor is most suitable for a particular joint; this depends on the size of the subject. The sensor must be capable of reaching across the joint so that the two end blocks can be mounted where least movement occurs between the skin and underlying skeletal structure. In certain circumstances more than one size of sensor will be appropriate. The following table is given for guidance only and refers to an adult population. Size used will vary within paediatrics.
|Joint||Output||No. of Channels||A Max||A Min||B||C||D||E||F||Weight (g)|
|W65||Wrist||Flexion/ extension, radial/ ulnar deviation||2||65||30||55||18||56||22||12||24|
|W75||Wrist (large)||Flexion/ extension, radial/ ulnar deviation||2||75||35||60||18||56||22||12||25|
|W110||Neck, elbow or ankle||Flexion/extension, lateral flexion,
Flexion/extension, or dorsiflexion/plantarflexion
|W150||Knee or hip||Flexion/ extension and valgus/ varus, or flexion/ extension and abduction/ adduction||2||150||100||70||18||56||22||12||27|
|W150/B||Back||Flexion/ extension, lateral flexion||2||150||50||120||18||56||22||12||29|
(measurements in mm)
|Transducer type||strain gauge|
|Accuracy||± 2º measured over a range of ± 90º|
|Repeatability||1º measured over a range of 90º|
|Operating temperature range||+10ºC to +40ºC|
|Temperature zero drift||0.15 degrees angle / ºC|
1Life test results have been collected by cycling the sensors through movements that would happen during everyday use. For example, placing a sensor on an adult elbow and moving from the neutral position to maximum flexion and back to the neutral position, the unit will function for typically 600,000 cycles.
Surface EMG Sensor
DataLITE wireless surface EMG sensor provides superb quality of signal and ease of use. Small, lightweight with a bandwidth of 10-490 Hz, a built-in x1000 gain amplifier and user select-able sampling frequencies of 500, 1000 or 2000 Hz.
|Dimensions||42 x 24 x 14 mm||Bandwidth||10 – 490Hz|
|Mass||17 g||Number of Contacts||2|
|Contact Diameter||10 mm||CMRR @ 60 Hz (dB)||> 96 dB (typically 110 dB)|
|Contact Center Spacing||20 mm||Full Scale||+/- 6 mV Peak to Peak|
|Wireless Transmission Data Loss||Tolerant for 120 mS||Gain||Standard unit x1000|
|Input Impedance||> 10,000,000 M Ohms||Accuracy||+/- 0.5%|
|Sampling Rate||User selectable of 500, 1000 or 2000 Hz per channel.||Battery Life||8 hours|
|Noise||‹ 5µV||Electrodes||Integral dry reusable|
The Accelerometer is a precision 3-axis wireless sensor to measure both dynamic acceleration (i.e. vibration) and static acceleration (i.e. gravity). With a range of ± 16G (± 156.91 m/s2), the sensor transmits data directly to the computer where it can be easily synchronized with angular data, EMG or other physiological measurements.
|Dimensions||44 x 24 x 12 mm||Number of Channels||3|
|Mass||15 g||Designation||X, Y, Z|
|Sampling Rate||User selectable of 2000, 1000 and 500 Hz per channel.||Output Range||0 to +/- 16 g|
|Bandwidth||DC to 1 KHz (+0 dB/-3 dB)||Wireless Transmission Data Loss||Tolerant for 120 mS|
|Accuracy Timing||≤ 3m S||Battery Life||12 hours|
Hand Held Trigger Switch
The Hand Held Trigger Switch provides the user with a very accurate solution of synchronizing DataLITE with DataLOG or other 3rd party systems, such as a Vicon or Qualisys motion-analysis camera based system.
Contact Switches plug into an Electrogoniometer and for example, by attaching the Electrogoniometer on the ankle, and the Contact Switches on the foot. It allows the researcher to co-ordinate the gait parameters with the dynamic movement of the ankle joint.
The DataLITE Adaptor is used with a DataLITE interface to communicate with the following devices: Dynamometer, MyoMeter, Pinchmeter, ForcePlates and Load Cells.
The various load/strength data collected may be synchronized real-time with other DataLITE sensors as part of a complete DataLITE system. Interfacing is effortless as all the precision calibration data is pre-programmed within the microprocessor controlled units.
DataLITE Wireless Adaptor Specifications
|Dimensions||67 x 29 x 15 mm|
|Enclosure Material||Acetal CoPolymer|
|Sampling Rate||User selectable of 2000, 1000 and 500 Hz per channel.|
|Bandwidth||DC to 1kHz, +0dB/-3dB (reduced by sampling rates lower than 2000)|
|Wireless Transmission Data Loss||Tolerant for 120mS|
|Battery||Lithium Polymer rechargeable|
|Battery Life||Fully charged battery life in excess of: