FOG70M Optical Gyroscope

Q: What preparation work should do when testing our fiber optic module?

A: During tests and using, it is better to add one metal base or heat dissipation Power supply: it is better to use laboratory power supply (which can display the current) during tests, then can judge the module’s status easily, when integrating the module into the system, DCDC power module can be selected, and the DCDC module select the one that has filter, if the dcdc module doesn’t have the filter, then please add one filter. When use laptop or PC to collect the data from our fiber optic module, please select the right data collecting card, the data collecting card should has photoelectric isolation ability. For more details, please contact with our sales.

Q: What input voltage should be provided for our fiber optic gyro?

A: ±5VDC±5%, and the current should ≥1A, so the impulse current can reach 1.5A at the moment of fiber optic gyro startup, this is very important, if the current is low, the fiber optic gyro may failed to start to work, if not work normally, the output data from FOG will be abnormal. And 15W power module (at least 10W) is recommended, for more details, please contact with us, we also can recommend the power module we used.

Q: What data type of the SkyMEMS fiber optic gyro?

A: it is integer data, this raw data divide by scale factor, the result is the angular rate (degree/s). the scale factor will be provided in the test report, every fiber optic gyro’s scale factor is different.

Q: Whether the fiber optic gyro lose data when outputting data at higher frequency?

A: please let us know what frequency you will use in your application, according to the frequency, and select the right baud rate, the fiber optic gyro will not lose data, and we also can provide solution based on your actual applications.

Q: How to calculate the temperature?

A: the actual temperature is the temperature data outputted by FOG divide by 16.

Q: Whether each FOG’s scale factor is different?

A: yes, right. Each FOG’s scale factor is different, but it is close for standard model, for the ODM FOG, the scale factor will change much.

Q: whether the connector and cable length can be selected?

A: yes, no problem, please let us know the connector type and cable length you want, then we can do it, and also different color cable can be selected.

Q: How about the delivery time?

A: for our standard model, if we have them in stock, only need 2~3days to re-test before shipping, if it is out of stock, then need around 2 weeks to arrange the production and tests. For the ODM FOG product, if needing to modify the structure, it will need around 3 weeks to arrange the production and tests.

Q: How to arrange the payment?

A: about the payment, please pay to our company account, the beneficiary’s name: NANJING SKY MEMS TECHNOLOGY CO., LTD.  And our email is only @skymems.com to contact with u formally. To notice this to avoid the loss.

Q: what are the key factors of industrial/tactical grade gyro performance?

A: the industrial/tactical grade gyros must outperform consumer grade gyros while maintaining small form factor and low cost. These five key areas are: Noise or Angle Random Walk (ARW) – The average error that occurs as a result of high frequency white noise. Bias Offset Error – A stationary gyro can incorrectly register some rotation; this is called bias offset error. Its deviation from zero is typically given at 25°C for an ideal environment (i.e. no temperature change, vibration, shock, or magnetic field applied). Bias Instability – Instability of the bias offset at any constant temperature and ideal environment. Temperature Sensitivity – Bias offset and absolute scale factor (SF) of a gyro will vary slightly with temperature changes. This can be improved with calibration. Shock and Vibration Sensitivity – Shock and vibration can be modeled as noise and bias offset in the gyro output, causing inaccuracies too large to accommodate. These inaccuracies are not easily improved with calibration.