Sensor Assembly¶
Tools¶
Holoseat Test Stand with computer to operate it
Soldering iron with stand
Helping hands
Exhaust fan
Sensor assembly jig (3D printed tool - provide link)
Flush snips
Safety glasses
Materials¶
Instant/super glue (prefer Loctite Super Glue Ultragel Control)
Solder
Isopropyl alcohol
Cotton balls
(1) WSSM-01: TRRS Audio Connector PCB
(1) WSSM-02: TLE4966L Infineon Technologies High Precsn Hall / Board Mount Hall Effect/Magnetic Sensor
(1) WSSM-03: Sensor Housing Lower Half
(1) WSSM-04: Sensor Housing Upper Half
(1) WSSM-05: 3M 9472LE Tape 5/8" x 1" piece
Safety Issues¶
Care must be taken when using the soldering iron, the tip is very hot
Always wear safety glasses while working with soldering irons
Avoid breathing in the soldering fumes, use a vent or hood if needed to provide adequate ventilation
Product¶
HS-04: Wheel Speed Sensor ModuleInsert Pic
Procedure¶
1. Place sensor on TRRS Audio Connector PCB¶
Place WSSM-02: TLE4966L Sensor in jig with label facing “out” (toward window in jig)
Slide TLE4966L Sensor into jig until its label aligns can be seen through the window in jig
Bend TLE4966L Sensor leads down along jig
Place TLE4966L Sensor pins through holes in WSSM-01: TRRS Audio Connector PCB with the jack facing up
Align TRRS Audio Connector PCB with lip on jig
Bend TLE4966L Sensor leads over to fix position of sensor relative TRRS Audio Connector PCB
Remove TLE4966L Sensor/TRRS Audio Connector PCB sub-assembly from jig
2. Solder TLE4966L Sensor to TRRS Audio Connector PCB¶
Place TLE4966L Sensor/TRRS Audio Connector PCB sub-assembly in helping hands
Solder all 4 TLE4966L Sensor leads to their pins on the TRRS Audio Connector PCB
Trim back excess leads from TLE4966L Sensor
3. Verify sensor¶
Place TLE4966L Sensor/TRRS Audio Connector PCB sub-assembly in WSSM-03: Sensor Housing Lower Half
Connect sensor cable from test stand to Wheel Speed Sensor sub-assembly
Place Wheel Speed Sensor sub-assembly in sensor mount on test stand step3.3-sm.jpg
Run tests - see test stand for API calls/application used for these tests
Verify direction
it should report cw when wheel turns 20 rpm cw
it should report ccw when wheel turns 20 rpm ccw
Verify cadence
it should report 30 +/- 10% when wheel turns cw at 30 rpm
it should report 40 +/- 15% when wheel turns cw at 45 rpm Note: would like to revisit test stand firmware for calculations used and to add a report of averaged cadence.
4. Finish assembly¶
Take Wheel Speed Sensor sub-assembly off test stand
Place WSSM-04: Sensor Housing Upper Half on top of WSSM-03: Sensor Housing Lower Half
Press Sensor Housing Upper Half into Sensor Housing Lower Half until it clicks into place and sits flush on the Sensor Housing Lower Half
Add 9472LE Tape
Clean the bottom of the Wheel Speed Sensor Module with isopropyl alcohol using a cotton ball
Wait for the alcohol to dry
Cut 5/8" long piece of 9472LE Tape
Apply 9472LE Tape to the bottom of the Wheel Speed Sensor Module Insert Pic
Press Wheel Speed Sensor Module firmly onto a flat surface for 60 seconds
Trim excess tape off of Wheel Speed Sensor Module Insert Pic