Objectives and goals

หลักๆจะเน้นไปในทางการศึกษาจัดทำ Digital Sun sensor ด้วย CMOS และ มีการใช้ sunspot centroid algorithm โดยคาดหวังให้ ราคาต้นทุนถูก ขนาดที่เล็กกว่า และใช้พลังน้อยกว่า โดยต้องมีความหน้าเชื่อถือของสัณญาณเที่ยบเท่ากับราคาในท้องตลาด

System and Component Requirements

The following are the list of components required for developing and testing the prototype of the digital sun sensor.

1. Digital Sun sensor
   1. Sensor head board witch a CMOS APS monochrome image sensor and its electronics
   2. Base board witch programmable readout electronics for image processing and serial communication witch the PC
   3. Sensor mask with single aperture configuration
   4. Sensor housing to secure the image sensor and its electronics
   5. USB cable for serial communication witch a PC
   6. PC and software package supporting the process
2. Benchmarking Tools
   1. Solar MEMS Technologies SSOC-A60LC Engineering model Analog Sun Sensor
   2. Silicon Laboratories MCU-C8051F120DK micro-controller development kit for analog-to-digital conversion
   3. Texas Instruments LMP7704 14-pin Quad Operational Amplifier as voltage follower/buffer (OP Amp)
   4. Two resistors as voltage divider
   5. Capacitor to reduce noise
   6. RS-232 to USB adapter for serial data communication witch the PC
   7. PC and software package supporting the process.
3. Digital Sun Sensor Characterization Tools
   1. Test fixture to mount the digital sun sensor onto the turn table
   2. LED light source for simulating the sun
   3. Test bench with a two-axes gimbal turn table
   4. PC and software package supporting the process.

Desired Performance

• Field-of-View (FOV) : 120◦ × 120◦
• Accuracy : < 0.3◦
• Power Consumption : Low (in mW)
• Voltage Supply : < 5 V
• Operating temperature range : -40◦ C to 85◦ C
• Physical dimensions of the sensor : 40 mm × 40 mm × 40 mm