WIRELESS MOTION SENSOR USER S GUIDE

Transcription

1 WIRELESS MOTION SENSOR USER S GUIDE

2 Telephone: (216) or toll-free GLNeuro ( ) 9:00 a.m. - 5:00 p.m. EST Monday Friday Fax: (216) Customer Support: support@glneurotech.com Sales: sales@glneurotech.com Website: Mailing Address: Great Lakes NeuroTechnologies Inc Sweet Valley Drive Cleveland, Ohio Great Lakes NeuroTechnologies Inc Wireless Motion Sensor User s Guide REF No. G , Rev A DCO G221 Page 1 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

3 TABLE OF CONTENTS Chapter 1. Introduction... 3 Intended Use... 3 Warnings... 3 System Requirements... 3 System Recommendations... 3 Care and Use Instructions... 4 Package Contents and Warranty Information... 4 Chapter 2. System Overview... 5 Chapter 3. Technical Specifications... 6 Chapter 4. Modes of Operation... 7 Streaming Mode... 7 Memory Mode... 7 Chapter 5. LED Status Indicator Chapter 6. GLNT Motion Capture Application Installation Streaming Motion Sensor Data Chapter 7. Troubleshooting Page 2 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

4 Chapter 1. Introduction Intended Use The wireless motion sensor integrates 3D accelerometers and gyroscopes with Bluetooth technology to capture three-dimensional motion during unconstrained activity. Kinematic data can be streamed wirelessly in real-time or stored in memory and later downloaded. The GLNT Motion Capture software application provides an interface for quickly connecting to up to four motion sensors and streaming data to a host PC. Software development kits (SDK), available for free download on the GLNT website, allow for custom software development including displays and analysis written in applications such as MATLAB, LabVIEW and other Windows-based development environments. Warnings Do not expose the Motion Sensor or Charging Pad to liquid. Liquid exposure may permanently damage the unit. Do not place the Charging Pad within nine inches of implanted pacemaker Do not place the Motion Sensor and Charging Pad next to televisions, air conditioning units, microwaves, or other appliances that may cause interference and damage from magnetic fields. Interference may also be caused by other devices on the 2.4 GHz band. The Motion Sensor may present a choking hazard. Keep out of reach of children under 3 years of age. NOTE: The manufacturer is not responsible for any radio or television interference caused by unauthorized modifications to this equipment. Such modifications could void the user s authority to operate the equipment. System Requirements PC with a Windows-based Operating System Bluetooth (v2.0 or greater) adapter Microsoft.NET 4.0 installation (available from System Recommendations Windows 7 2 GB RAM 1280x800 or greater display resolution 1 GB or more available Hard Disk space Microsoft compatible keyboard and mouse or other pointing device Adobe Reader or Adobe Acrobat NOTE: Macintosh and Linux operating systems not supported Page 3 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

5 Care and Use Instructions To maintain hygienic safety, a thorough cleaning of the Motion Sensor is advised between uses. Use only the following to safely clean the Motion Sensor and Charging Pad: Dimethyl benzyl ammonium chloride 0.3 % maximum concentration (i.e. germicidal disposable wipes) Alcohol-free glass cleaning fluids Water with mild (neutral ph) soap solutions (do not submerge any equipment, wipe down with damp cloth) Dry microfiber cleaning cloth or chamois cloth without oil Static-free cloth wipes Avoid strong solvents such as alcohol wipes, acetone, ammonium chloride, methylene chloride and hydrocarbons which can permanently damage the surface of the Motion Sensor and Charging Pad. Package Contents and Warranty Information Great Lakes NeuroTechnologies Inc. thanks you for your recent product purchase. Great Lakes NeuroTechnologies offers phone technical support (9 AM-5 PM EST) and warrants the Wireless Motion Sensor (parts and labor) for 1 year from the date of purchase which covers material and workmanship under normal operating conditions and use. Technical support after the 1 year period will be charged hourly. Call Great Lakes NeuroTechnologies for hourly rates. For your benefit, we recommend that you record the pertinent details below. If necessary, this information will allow us to better serve your needs. We highly recommend that you staple a copy of the sales receipt to the blank pages in the back of this manual. Please check that your kit has the required components and record the requested data below: Sensor; REF USB Charging Pad; REF GLNT Motion Capture Application; REF User s Guide (this document); REF G Sensor SN(s): Date of Purchase: Page 4 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

6 Chapter 2. System Overview Figure 1. Wireless Motion Sensor and Inductive Charging Pad. The Motion Sensor (Figure 1A) measures three-dimensional motion using accelerometers and gyroscopes. Accelerometers measure linear acceleration while gyroscopes measure angular velocity. Motion sensor data are sampled at 64 Hz. The motion sensor function depends on its current state. The green LED (Figure 1C) on the side of the motion sensor is used to display the state of the sensor. The Charging Pad (Figure 1B) serves as the charging platform for the Motion Sensor, drawing power through a USB connection and transferring it via inductively coupled coils when the Motion Sensor is placed label-side down on the Charging Pad (Figure 1C). When the Charging Pad is powered on, its indicator is green. This indicator changes color to blue when the Motion Sensor is connected, as shown in Figure 1C. Fully charging the Motion Sensor battery from empty will take approximately 3 hours. The green LED on the Motion Sensor will indicate that it is charging and remain ON once fully charged. NOTE: We recommend removing the Motion Sensor from the Charging Pad once the green LED on the motion sensor stops blinking, indicating that a full charge has been reached. Page 5 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

7 Chapter 3. Technical Specifications Sampling Rate 64 Hz Bluetooth Class 2 device, Bluetooth 2.0 Battery life 8 hours logging (Memory Mode) / 3 hours streaming Recharge time 1 hour to 90% / 3 hours to 100% Memory Dimensions (L x W x H) Weight 16 MB (8 hours) 1.28 x 0.81 x 0.60 inches 0.30 ounces Gyroscopes Sensor Type MEMS MEMS Accelerometers Measures Angular velocity Linear acceleration Number of axes 3 (orthogonal) 3 (orthogonal) Range ± 2000 /s ± 5 g Calibration accuracy ± 20 /s ± 50 mg Resolution 1 /s 2 mg Noise 0.5 /s (RMS) 1.5 mg (RMS) Page 6 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

8 Chapter 4. Modes of Operation The Motion Sensor has two modes of operation: Streaming Mode and Memory Mode. When removed from the Charging Pad, the Motion Sensor transitions into one these modes depending on its configuration. The green LED on the side of the motion sensor is used to display the state of the sensor. Streaming Mode In Streaming Mode, real-time data is sent over a Bluetooth connection from the Motion Sensor device(s) and buffered at the PC s virtual serial port, where it is collected by background processes in the software device object. Regardless of how often data is read from the data buffer, the data itself is sampled at 64 Hz. Data can be collected regularly from the motion sensor device object by the developer s application for display, processing, or archival. The most efficient interval between data collections will vary slightly by system and environment. By default, the sensor transitions into Streaming Mode when it is removed from the charging pad. The Bluetooth radio remains powered on and the Motion Sensor is able to accept commands to connect and stream data. If no connection is initiated within 15 minutes, the sensor shuts off. Details for designing custom applications are provided in the Software Development Kit. However, the major steps of interacting with the Motion Sensor in Streaming Mode are summarized as follows: 1. Power the Motion Sensor on by placing it on the Charging Pad 2. Establish a Bluetooth connection with the Motion Sensor 3. Remove the Motion Sensor from the Charging Pad and mount it to the locations of interest 4. Start acquisition to begin streaming data over the Bluetooth connection to the buffer on the host PC 5. Stop acquisition to stop streaming data 6. Disconnect from the Motion Sensor Memory Mode In Memory Mode, acquired data is stored to the flash memory on-board the Motion Sensor. Because no data is streamed, the Bluetooth radio is powered off while in this state. Logging data is achieved in the context of a study which defines the time at which the Motion Sensor begins saving data. This study can be configured to record with a duty cycle (e.g., record the first 15 seconds of each 20 Page 7 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

9 second cycle). The Motion Sensor contains enough memory to store 8 hours of data samples at a 100% duty cycle. If a Memory Mode study has been configured, the Motion Sensor goes into a low power state when it is removed from the charging pad until the start time of the study arrives (Figure 2). If the Motion Sensor is removed from the charging pad after the configured start time, it immediately begins recording data (Figure 3). The actual time at which the sensor started recording data is logged. A data collection alarm is set for CycleTime seconds. The sensor then collects samples for RecordTime seconds and sleeps for the remainder of CycleTime. Figure 2. Initiation of data collection in Memory Mode when the Motion Sensor is removed from the Charging Pad before the start time arrives. The Motion Sensor begins collecting data at the configured start time. Figure 3. Initiation of data collection in Memory Mode when the Motion Sensor is removed from the Charging Pad after the start time has elapsed. The Motion Sensor begins collecting data immediately upon removal from charging pad. Page 8 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

10 The Motion Sensor must be placed back on the Charging Pad to retrieve data. If the sensor is on the charging pad at the beginning of a cycle, it records all zeros for that interval (Figure 4). NOTE: State transitions will not occur during RecordTime of a memory mode cycle. The state transition will occur once the RecordTime interval has elapsed. One practical implication of this behavior is that the Bluetooth radio will not be activated until RecordTime has completed and the sensor transitions into the on Charging Pad state (Figure 4). Figure 4. Motion Sensor behavior when placed on the Charging Pad during Memory Mode data collection. Once the Motion Sensor Bluetooth Radio is powered on, it can accept commands to retrieve data, erase the flash memory, or power the Motion Sensor off. Retrieving the data can take up to 15 minutes if the memory is full. Erasing the memory can take approximately 90 seconds to complete and returns the device its default Streaming Mode. While the Software Development Kit can be used to design custom applications utilizing Memory Mode in a number of Windows-based development environments, the most thoroughly developed examples are provided in the MATLAB documentation. These can be used as a reference when designing applications in other environments. The major steps of interacting with the Motion Sensor in Memory Mode are summarized as follows: 1. Power the Motion Sensor on by placing it on the Charging Pad 2. Establish a Bluetooth connection with the Motion Sensor Page 9 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

11 3. Set the clock on the Motion Sensor 4. Configure the Memory Mode study (e.g., start time, duty cycle) 5. Remove the Motion Sensor from the Charging Pad and mount it to the locations of interest 6. Once data collection is complete, return the Motion Sensor to the Charging Pad 7. Once the Bluetooth radio is powered on, establish a Bluetooth connection with the Motion Sensor 8. Download the data and erase the Motion Sensor Memory Page 10 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

12 Chapter 5. LED Status Indicator When the Motion Sensor is on the Charging Pad, the following LED patterns are possible. State Description LED pattern 1. Charging 2. Fully Charged 3. Recording to Memory 4. File Transfer in Progress Motion Sensor is charging and will transition into either Streaming Mode or Memory Mode when removed from Charging Pad A full battery charge has been reached. Motion Sensor will transition into either Streaming Mode or Memory Mode when removed from Charging Pad A Memory Mode study is in progress (i.e., the Motion Sensor is recording to its flash memory). The Bluetooth radio is powered on and the Motion Sensor can receive commands to retrieve data, erase the flash memory, or power off Download file command was received and the contents of the flash memory are being copied to the host PC over the Bluetooth connection. 2 seconds ON, 2 seconds OFF Solid, no blinking 3x200 milliseconds ON, 1 second OFF 5 quick flashes followed by a brief pause 5. Erase in Progress Erase memory command was received and the flash is being erased 2 quick flashes every 5 seconds When the motion sensor is off of the Charging Pad, the following LED patterns are possible: State Description LED pattern 1. Streaming Mode, Not Connected 2. Streaming Mode, Connected 3. Memory Mode, Recording to Memory The Bluetooth radio is on but the host PC is not connected to the Motion Sensor. The host PC is connected to the Motion Sensor and commands can be sent to start and stop streaming. A Memory Mode study has been configured and the start time has passed. Because no data is being streamed, the Bluetooth radio is powered off. 1 second ON, 1 second OFF 3 milliseconds ON, 2 seconds OFF 100 millisecond flash at beginning and end of each RecordTime interval Page 11 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

13 Chapter 6. GLNT Motion Capture Application The GLNT Motion Capture Application can be used to stream data in real-time from up to four motion sensors and save the data to file. Installation 1. Download the installation software: 2. Unzip the Motion Capture Application file and run setup.exe Run this to start the installer NOTE: The application will need to create and access files on your computer s C: drive 3. The installer will ask you where to install the program and to agree to the National Instruments license agreement. Select Next to continue with installation. 4. The installer will complete the installation and you will need to restart your computer 5. Start GLNT_Sensors.exe to run the application. Page 12 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

14 Run this to start the program Streaming Motion Sensor Data This program will enable you to obtain data from up to four motion sensors. If this is your first time using the sensors, make sure that the battery has charged for at least 30 minutes prior to use. 1. Ensure that your sensor(s) are on (i.e., the LED should be in the Streaming Mode, Not Connected state). A. If they are not, return them to the charging pad to awaken them and then remove them from the charging pad 2. Open the program. 3. The INFO button provides information about the program, a quick start guide, a link to this full users guide, and a link to the GLNT website. Page 13 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

15 Information provided by the INFO button and the Quick Start guide. Select the EXIT button with in the information window to return to the general menu. 4. If this is your first time running the program you will need to select SEARCH and identify your sensors. Once you have assigned the sensors, you will not need to complete this step again unless you wish to change the number or configuration of the sensors. 5. If you select CONNECT. The program will use the sensors that you have previously selected. If you select SEARCH the following menu will appear. When the search is complete the LED will change color and the Search Again option will become visible. If you do not see your sensor, check that your sensor and computer s Bluetooth are on and select Search Again. 6. Select your sensors by clicking on the sensor ID, the sensor select buttons and then Done. The sensor ID appears on the label of each sensor unit. Each sensor can only be selected once. The sensors MAC address will appear in the text box below after you select the sensor. This may be useful if you plan on developing custom applications for the sensor. Choose your sensor Then hit the select button Once you have assigned all of the sensors that you wish to use, select Done. Page 14 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

16 7. Select CONNECT once you have identified your sensors. The system will change the sensor LEDs to green once it has connected and the START option will become available once the computer is connected to all of your identified sensors. These LEDs will illuminate as the system connects to each sensor. The START button will become available once all of the sensors are connected. 8. Select the desired settings for your data collection application. This setting controls if data will be saved. If this setting is on (as shown), information about the save location will be requested after data collection. This setting controls if a sound will be played at the start and end of data recording. This setting controls if the data will be collected for a set time or collection will be stopped manual. Data will be collected for the time listed below if this setting is off (as shown). 9. Data will start to be collected from the sensors after you press START. You will see the data (acceleration in X, Y, Z and angular velocity in X, Y, and Z) within the sensor graphs as shown. Page 15 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

17 Click on the sensor name to switch between the different If Manual Stop is off (as shown) the program will automatically stop when the elapsed time is equal to the collection time, or you can stop the program by pressing Stop. You will need to press the Stop button if the Manual Stop option is on. 10. If the save data setting is on, after data collection a window will appear for you to choose the location to save the data. Change the file name and save location as desired and save your data. 11. You can choose to record more data, change sensors using SEARCH, or select the EXIT button to quit the program. Page 16 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

18 Click here to quit the program Page 17 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014

19 Chapter 7. Troubleshooting 1. Why won t my computer connect to the motion sensors? If you are unable to successfully connect to a motion sensor, please try the following: A. Ensure that the Motion Sensor is powered on and the Bluetooth adapter in your computer is enabled. B. Make sure that you are not attempting to simultaneously connect to more than 7 Bluetooth devices, counting any motion sensors and other accessories (e.g., mouse, keyboard, printer, cell phone) C. Ensure that Microsoft.NET 4.0, which the API requires, is installed. D. Check to see if your Bluetooth adapter is using the latest drivers. The API does not work with the Widcomm Bluetooth stack, which some drivers use. Updating to the most recent drivers may resolve some communication issues. 2. The LED on my motion sensor lights up when the sensor is on the charging pad, but turns off and does not blink or flash when I remove it from the charging pad. This will happen when the battery is completely depleted. If this behavior persists after you allow 30 minutes for charging, please contact Great Lakes NeuroTechnologies by (support@glneurotech.com) or by phone ( , 9am-5pm EST, Monday-Friday). 3. Why did the sensor stop streaming in the middle of data collection? This will happen if the battery dies or the sensor is out of range of the Bluetooth receiver on the host PC. Please make sure the battery is fully charged. The range will vary depending on the environment. 4. I can connect to the motion sensor, but it does not stream any data when I start acquisition. Remove the sensor from the charging pad the motion sensor does not stream data unless it is off of the charging pad. 5. Why does the motion sensor turn off while I am setting up my experiment and mounting them to the limbs? The motion sensors will power off when they are off the charging pad and in streaming mode, but a Bluetooth connection has not been established. You can either connect to the sensors before you start your setup, or you can touch a charging pad to the sensors once they are mounted to power them on. Page 18 of 18 Rev A DCO G221 Great Lakes NeuroTechnologies Inc.2014