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-Project: /_project.yaml
-Book: /_book.yaml
-
-<!--
-    Copyright 2018 The Android Open Source Project
-    Licensed under the Apache License, Version 2.0 (the "License");
-    you may not use this file except in compliance with the License.
-    You may obtain a copy of the License at
-    http://www.apache.org/licenses/LICENSE-2.0
-    Unless required by applicable law or agreed to in writing, software
-    distributed under the License is distributed on an "AS IS" BASIS,
-    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-    See the License for the specific language governing permissions and
-    limitations under the License.
--->
-
-# Sensor Fusion Box Details
-
-This page provides information on how to purchase or assemble a Sensor Fusion
-Box. The Sensor Fusion Box is used in the CameraITS sensor_fusion test and
-multi-camera sync test. It provides a consistent test environment for measuring
-timestamp accuracy of camera and other sensors for Android phones. It consists
-of plastic box components that are laser cut from computer-aided design (CAD)
-drawings and a Servo Control Box.
-
-You can purchase a Sensor Fusion Box or build your own.
-
-## Purchasing a Sensor Fusion Box
-
-We recommend purchasing a Sensor Fusion Box from one of the following qualified
-vendors.
-
-* *Acu Spec, Inc.*  
-  990 Richard Ave, Ste 103, Santa Clara, CA 95050  
-  fred@acuspecinc.com  
-* *MYWAY DESIGN*  
-  4F., No. 163, Fu Ying Rd., New Taipei City, Taiwan  
-  sales@myway.tw  
-  http://www.myway.tw/
-
-## Building a Sensor Fusion Box
-
-This section includes step-by-step instructions for assembling a Sensor Fusion
-Box from laser-cut acrylonitrile butadiene styrene (ABS) components (shown in
-Figure 1):
-
-<img src="/compatibility/cts/images/sensor_fusion_assembly_box_cad_drawing.png" width="700" alt="CAD drawing of Sensor Fusion Box components" class="screenshot">  
-**Figure 1.** Mechanical drawing of Sensor Fusion Box components
-
-### Required tools
-
-Before starting, ensure you have downloaded the technical drawings for the
-Sensor Fusion Box (included in the
-[Sensor Fusion Box zip file](/compatibility/cts/sensor_fusion_1_5.zip)) and
-have the following tools available:
-
-* Phillips head screwdriver
-* Hex keys
-* Power drill set
-* Exacto knife
-* Tape
-
-### Step 1: Apply vinyl stickers
-
-After creating the ABS components with a laser
-cutter, apply vinyl stickers to the plastic box to get the proper color control
-on the interior of the test box:
-
-1. Apply vinyl on the smooth side of the ABS
-   as shown in Figure 2. For helpful tips on applying vinyl, refer to
-   [wikiHow](https://www.wikihow.com/Install-a-Vinyl-Graphic){: .external}.
-1. Cut out the necessary holes on the vinyl with the exacto knife.
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_abs_pieces.png" width="350" alt="BS pieces">  
-    **Figure 2.** ABS pieces with vinyl applied on the smooth side (interior of
-    the box)
-
-### Step 2: Prepare phone mount and attach servo mount
-
-To prepare the phone mount to attach to the servo:
-
-1. Tap 16 holes on the phone fixture with ¼" - 20 and make countersink
-   holes on the back of the phone fixture.
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_phone_fixture_holes.png" width="350" alt="Phone fixture holes">  
-    **Figure 3.** Phone fixture with tap and countersink holes
-
-1. With the large shaft that came with the servo, drill pilot holes with a #43
-   drill bit (2.26 mm) into the last holes from each side so 4-40 screws can be
-   inserted through the holes.
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_servo_shaft.png" width="350" alt="Servo shaft">  
-    **Figure 4.** Servo shaft with pilot holes at each end
-
-1. Insert and tighten the flat-head 4-40 screws as shown in figure 5 on the
-   front of the phone fixture and tighten the shaft as shown in figure 6.
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_screws.png" width="350" alt="Shaft and screws">  
-    **Figure 5.** Flat-head 4-40 screws
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_shaft.png" width="350" alt="Shaft">  
-    **Figure 6.** Shaft on the back of fixture, tightened by screws applied
-    from the front
-
-### Step 3: Attach phone clamps
-
-To attach the phone clamps:
-
-1. Apply nylon thumb screws, rubber adhesive, and wire spring to the aluminum
-   clamp.
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_clamp.png" width="350" alt="Clamp with rubber adhesive">  
-    **Figure 7.** Clamp with rubber adhesive, thumb screws and wire spring
-
-1. Screw the phone clamps' thumb screws into the tapped holes of the phone
-   fixture as shown in figure 8. You can adjust the location of the phone mounts
-   depending on the size of the phones as shown in figure 9.
-
-    * Mechanical drawing:
-
-        <img src="/compatibility/cts/images/sensor_fusion_assembly_clamp_attachment_drawing.png" width="600" alt="CAD drawing of clamp attachment" class="screenshot">  
-        **Figure 8.** Mechanical drawing of clamp attachment to phone fixture
-
-    * Phone mounts attachment to phone fixture:
-
-        <img src="/compatibility/cts/images/sensor_fusion_assembly_assembled_fixture.png" width="350" alt="Assembled phone fixture">  
-        **Figure 9.** Assembled phone fixture
-
-### Step 4: Assemble sliding door rail
-
-1. Fix sliding panel rails on the top and bottom of the box towards the front.
-   Figure 10 shows 6-32 screws on pre-tapped holes. Alternatively, you can use
-   self-tapping screws.
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_fixed_rail.png" width="450" alt="Fixed rail">  
-    **Figure 10.** Fixed sliding panel rail on top and bottom of box
-
-### Step 5: Attach lighting
-
-To attach the light brackets and diffuser:
-
-1. Stack two handle pieces on top of each other and assemble them using 6-32
-   screws (or use self-tapping screws).
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_handle_pieces.png" width="450" alt="Handle pieces and assembly">  
-    **Figure 11.** Sensor fusion box handle pieces and assembly
-
-1. Prepare four 4-40 screws, nuts, and acorn nuts to fix the mounting bracket
-   from the lighting kit to the wall of the box.
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_interior_wall_screws.png" width="350" alt="Screws and bracket on interior wall">  
-    **Figure 12.** 4-40 screws and light bracket on the interior wall of the box  
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_exterior_bolts.png" width="350" alt="Exterior with bolts applied">  
-    **Figure 13.** Bolts and acorn bolts applied to the screws from the exterior
-    of the box
-
-1. Cut the light diffuser to an appropriate size to wrap the light strips.
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_light_strips_diffusers.png" width="350" alt="Light strips and diffusers">  
-    **Figure 14.** Light strips and light diffusers
-
-1. Wrap the light diffuser around the strip and tape it at the back.
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_strips_taped_back.png" width="350" alt="Strips and diffusers taped from back">  
-    **Figure 15.** Light strips and light diffusers taped from the back
-
-1. Snap the lights into the brackets (can be a tight fit).
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_interior_wall_lights.png" width="450" alt="Lights on interior wall">  
-    **Figure 16.** Lights not mounted in brackets (left). Lights mounted in brackets (right).
-
-### Step 6: Attach phone fixture to servo plate
-
-To attach the phone fixture to the servo plate:
-
-1.  Prepare four 6-32 screws and a servo plate to fix the servo onto the wall.
-    Fix the servo onto the interior wall and insert the screws from the inside
-    into the servo plate on the exterior wall.
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_servo_servo_plate.png" width="450" alt="Servo and servo plate">  
-    **Figure 17.** Servo and servo plate held in place with 6-32 screws
-
-1.  Secure phone fixture onto the servo with nylocks (pushing the center of the
-    shaft into the servo's rotation center).
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_phone_mount_servo.png" width="450" alt="Phone fixture on servo">  
-    **Figure 18.** Phone mount fixed on servo shaft with nylocks
-
-1.  Screw the phone fixture onto the servo with its servo screw.
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_servo_screw.png" width="350" alt="Phone fixture on servo with screw">  
-    **Figure 19.** Securing phone fixture onto servo with servo screw
-
-### Step 7: Final assembly
-
-To complete assembly of the Sensor Fusion Box:
-
-1.  Secure servo control box on the left of the servo with 4-40 screws from the
-    outside and fasten from the inside with nuts.
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_servo_on_wall.png" width="450" alt="Servo control box on wall">  
-    **Figure 20.** Secure servo control box onto the wall
-
-1. Tape the box together, then screw the parts together (you might need to
-   pre-drill holes in some parts).
-
-    * Assembled Sensor Fusion Box:
-
-        <img src="/compatibility/cts/images/sensor_fusion_assembly_taped_box.png" width="450" alt="Taped box">  
-        **Figure 21.** Taped box with motor assembly and servo control box and
-        screw detail
-
-1. Print out a colored copy of the checkerboard (included in the [Sensor Fusion
-   Box zip file](/compatibility/cts/sensor_fusion_1_5.zip)) on A3 (or 11 x 17
-   inch) paper, and tape it on the opposite wall of the phone fixture.
-
-   Make sure the red dot in the center of the checkerboard is directly facing
-   the camera when placed on the fixture, as shown below.
-
-    <img src="/compatibility/cts/images/sensor_fusion_assembly_checkerboard.png" width="350" alt="Checkerboard">  
-    **Figure 22.** Checkerboard printed and taped to the opposite wall of phone
-    fixture