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Texas Instruments DLP NIRscan EVM Скачать руководство пользователя страница 7

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DLPU016C – April 2014 – Revised April 2019

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Copyright © 2014–2019, Texas Instruments Incorporated

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Содержание DLP NIRscan EVM

Страница 1: ...DLP NIRscan Evaluation Module User s Guide Literature Number DLPU016C April 2014 Revised April 2019 ...

Страница 2: ...onnections 14 1 5 DLP NIRscan EVM Jumpers 16 2 Quick Start 18 2 1 Power Up the DLP NIRscan EVM 18 3 Operating the DLP NIRscan EVM 20 3 1 Quick Scan Mode 21 3 2 Custom Scan Mode 23 3 3 Slew Scan Mode 28 3 4 File Download Icon 32 3 5 System Information 32 A Safety 34 A 1 Warnings and Cautions 34 B Power Supply Requirements 35 B 1 External Power Supply Requirements 35 C NIRscan EVM Reprogramming Proc...

Страница 3: ...ntal and Diagonal Lines 12 1 6 DLP NIRscan EVM 13 1 7 DLP NIRscan EVM Connectors Backside View 15 1 8 DLP NIRscan Connectors Upside Down Side View 15 1 9 DLP NIRscan Jumper Locations 16 2 1 DLP NIRscan Homepage 19 3 1 Quick Scan Screen 21 3 2 Example Quick Scan 22 3 3 Example Quick Scan Spectrum Data 23 3 4 Custom Scan Screen 24 3 5 Example Custom Scan 26 3 6 Example Custom Scan Spectral Data 27 3...

Страница 4: ... Revised April 2019 Submit Documentation Feedback Copyright 2014 2019 Texas Instruments Incorporated List of Tables List of Tables 1 1 DLP NIRscan EVM Specifications 11 1 2 DLP NIRscan EVM Components 14 1 3 DLP NIRscan Connections 15 ...

Страница 5: ...is a trademark of Google Inc Internet Explorer is a registered trademark of Microsoft Corporation Mozilla Firefox is a registered trademark of Mozilla Corporation Sullins Connector Solutions is a registered trademark of Sullins Connector Solutions Inc About This Guide This guide is an introductory document for the DLP NIRscan EVM that provides an overview of the system and the systems software Oth...

Страница 6: ...right 2014 2019 Texas Instruments Incorporated Read This First Figure 1 DLP NIRscan Evaluation Module Use the most recent versions of either Firefox Safari Google Chrome or Internet Explorer There are some compatibility issues noted with IE8 and IE9 so these versions are not recommended ...

Страница 7: ...ated Documentation DLPC350 data sheet DLPC350 DLP Digital Controller for Portable Advanced Light Control DLPS029 DLP4500NIR data sheet DLP 0 45 WXGA NIR DMD DLPS032 Programmer s guide DLPC350 Programmer s Guide DLPU010 Design guide DLP Spectrometer Design Considerations DLPA049 Technical Support Refer to the DLP and MEMS TI E2E community support forums ...

Страница 8: ...alyzers The new DLP4500NIR DMD is optimized for operation at wavelengths between 700 nm and 2500 nm The DLP NIRscan EVM is one possible implementation of this new DLP technology operating from 1350 nm to 2450 nm 1 2 What is in the DLP NIRscan EVM The DLP NIRscan EVM is a complete NIR spectrometer EVM using DLP technology The EVM package includes Near infrared optomechanical spectrometer engine Tra...

Страница 9: ...face Lamp driver board Low noise constant current supply for the broadband lamp TEC driver board Thermistor feedback signal amplifier for temperature measurement Closed loop TEC current control with high current driver DMD interconnect board Associated cable harnesses Three disposable cuvettes each 12 5 12 5 mm with 10 mm path length for use during the spectrometer evaluation Figure 1 1 shows the ...

Страница 10: ...ses through the sample enters the engine through the input slit Slit size is relative to the desired wavelength resolution of the spectrometer This spectrometer uses a 25 µm wide slit which is approximately 4 2 mm tall After light passes through the slit the light then passes through a collimating lens through a 1350 to 2450 nm bandpass filter where the light then strikes a reflective grating This...

Страница 11: ...hs 1350 2450 nm Spectrometer typical power 12 W Tungsten lamp typical power 4 W The optical engine includes the DLP4500NIR 0 45 inch DMD with 1039680 mirrors arranged in 912 columns 1140 rows with the diamond pixel array geometry and configuration shown in Figure 1 3 and Figure 1 4 Due to the diamond pixel configuration the array produces smooth diagonal lines with jagged vertical and horizontal l...

Страница 12: ...ource Linux kernel The user controls the web pages through an RNDIS connection over USB or by IP address over Ethernet connected to the local area network DLPC350 ASIC The controller of the DLP4500NIR based DLP system the DLPC350 device receives the pattern data from the Sitara over a 24 bit RGB bus The DLPC350 decodes the pattern information and converts the information into the correct format fo...

Страница 13: ...ern being displayed on the DMD TEC driver board The TEC driver board uses the feedback from a thermistor located in the detector to provide electrical current to the detector TEC in a closed loop control circuit thereby cooling the detector to approximately 40 F and reducing detector noise Lamp driver board The lamp driver board provides an extremely low noise high power source for the tungsten ha...

Страница 14: ...DC converters up to 18 Vin for DLPC350 power TPS79718 Single output LDO 50 mA fixed 1 8 V low quiescent current Powergood out for DLPC350 power TLV61230 5 V supply for USB and input to TPS65217 TLV61230 3 3 V supply REF5025 Low noise very low drift precision voltage reference for TEC and ADC references TPS71750 5 V analog supply for ADC and TEC TPS71733 3 3 V analog supply for ADC ESD protection T...

Страница 15: ...on 14 As of software release v1 0 to use the ethernet connection requires knowledge of the IP address assigned to the DLP NIRscan EVM at power up If a static IP address cannot be assigned TI recommends using connection 14 8 Power connector Use a power supply with a 12 V DC output with 3 to 5 A current rating and a plug of 2 5 mm inner diameter 5 5 mm outer diameter and 9 5 mm female center positiv...

Страница 16: ...nnector Solutions SPN02SYBN RC Digi Key part number S3404 ND Figure 1 9 DLP NIRscan Jumper Locations TEC Driver Board VR1 This variable resistor sets the maximum current provided to the TEC of the detector This current level determines the ambient temperatures at which the detector remains cooled to approximately 40ºC The factory establishes this amount of resistance Do not change the resitance un...

Страница 17: ...Trigger out 2 Terminals 1 and 2 DLPC350 generated trigger out 2 default Terminals 2 and 3 Sitara generated trigger out 2 J13 Power selector for trigger out voltage levels Jumper installed Trigger outputs on J15 use internal 3 3 VDC levels default Jumper open Trigger outputs on J15 use voltage levels supplied J15 terminal 1 Note Externally supplied voltage levels need to be 1 8 3 3 or 5 V J18 DLPC3...

Страница 18: ...ere is no RNDIS driver installed on the computer the software typically prompts the user before searching for the driver After the RNDIS driver is installed start a browser session The following steps install the RNDIS drivers on Windows 7 or Windows 10 in case they are not installed Download RNDIS drivers from this link http www catalog update microsoft com Search aspx q USB 20RNDIS 20Gadget 5th ...

Страница 19: ...w ti com Power Up the DLP NIRscan EVM 19 DLPU016C April 2014 Revised April 2019 Submit Documentation Feedback Copyright 2014 2019 Texas Instruments Incorporated Quick Start Figure 2 1 DLP NIRscan Homepage ...

Страница 20: ...s Quick Scan Scans can be made quickly and effortlessly with fixed configuration parameters Custom Scan Users can interact with certain settings to customize scans and access raw scan data Slew Scan Users can customize the scan for distinct regions for select wavelengths resolutions and integration times Download Files Users can download the spectral and or raw data files for scans to their local ...

Страница 21: ...n the reference but uses reference data from the last Quick Scan reference If measuring a liquid sample in a cuvette then the reference scan is typically taken using an empty cuvette in the sample holder This reference scan allows the absorbance of the cuvette material to be negated when the absorbance of the liquid sample material is calculated For measurement of solid transmissive materials such...

Страница 22: ...elength on the x axis 1 To run another Quick Scan insert a new sample in the sample holder and select the Run New Scan button The new scan is taken the new absorbance spectrum is calculated using the previous reference and the new spectrum re plots to the screen all with a single click This action can be performed repeatedly The filename provided on the previous Quick Scan screen is incremented wi...

Страница 23: ...n name has not been changed the sample name defaults to default_scan 4 Spectral Range Start always 1350 nm for Quick Scan mode 5 Spectral Range Stop always 2450 nm for Quick Scan mode 6 Number of wavelength points 200 for Quick Scan mode 7 Digital resolution 5 5 nm for Quick Scan mode 8 Number of scans to average 1 scan for Quick Scan mode 9 Total measurement time The time taken to scan all wavele...

Страница 24: ... This number defines into how many wavelengths the spectral range is divided The minimum is 3 and the maximum is 1100 The included optical system has an optical resolution of 12 nm Increasing the number of wavelength points such that the computed digital resolution is much less than 12 nm reduces system throughput without much of an optical resolution advantage Digital resolution This is an inform...

Страница 25: ... Patterns button is green click this button When selected the DLP NIRscan calculates the new DMD patterns for the user selected inputs generates the patterns applies the hardware specific calibration and saves the patterns in memory for the scan to commence This step is complete when the Set Reference button turns green and the message Patterns Generated Set New Reference message appears 4 Select ...

Страница 26: ...me sample to re sample the same material and select the Run New Scan button The new scan runs the new absorbance spectrum calculates using the previous reference and the new spectrum plots all with one button click This action can be performed repeatedly Note that the scan name provided on the previous Custom Scan screen increments with each sample run 2 To save the spectrum data to a local machin...

Страница 27: ... Scan screen 7 Digital Resolution This reflects the number calculated on the Custom Scan screen 8 Number of Scans to Average This reflects the number entered on the Custom Scan screen 9 Total Measurement Time This reflects the number calculated on the previous screen 10 The rest of the file is the actual data and includes Wavelength Calculated absorbance value for each wavelength Average reference...

Страница 28: ...art This reflects the lower scan limit entered on the previous screen 5 Spectral Range Stop This reflects the upper scan limit entered on the previous screen 6 Number of Wavelength Points This reflects the number entered on the previous screen 7 Digital Resolution This reflects the number calculated on the previous screen 8 Number of Scans to Average This reflects the number entered on the previou...

Страница 29: ...re 3 8 shows a Slew Scan configuration example showing how spectral regions of interest are entered in the table all other areas of the spectrum not entered are ignored thereby making the scan much shorter yet still capable of detecting the presence or absence of important molecules Variable Resolution Based on the spectrum expected for a given substance there may be regions of the spectrum where ...

Страница 30: ... DMD within this region only Lambda stop Lambda Start wavelength points the Digital Resolution for which the DMD is programmed Digital Resolutions is only one of the contributors to the true spectral resolution of a DLP based spectrometer See DLP Spectrometer Design Considerations for more information regarding spectrometer resolution as a function of DMD digital resolution input slit width and op...

Страница 31: ... to the first wavelength in region N 1 1 To run another scan insert the new sample and select the Run New Scan button The new scan runs the new absorbance spectrum calculates using the previous reference and the new spectrum plots all with one button click This action can be performed repeatedly The scan filename provided on the previous Slew Scan configuration screen increments with each sample r...

Страница 32: ...hows the files for all scans which have been captured on the NIRscan The user must select the scan type for the data they are seeking to download by selecting either the Quick Scan button the Custom Scan button or the Slew Scan button After the scan type is selected the user can select one file name per instance and download the Spectrum data by selecting Download Spectrum Data or the raw data by ...

Страница 33: ...dback Copyright 2014 2019 Texas Instruments Incorporated Operating the DLP NIRscan EVM Figure 3 11 Information Screen The version displayed on the screen is the software version for the Sitara processor The screen also included hyperlinks to documents relevant to the DLP NIRscan and its components ...

Страница 34: ... WARNING Possible hazardous optical radiation emitted from this product Do not stare at operating LEDs May be harmful to eyes Also avoid touching components during operation CAUTION To minimize the risk of fire or equipment damage make sure that air is allowed to circulate freely around the DLP NIRscan when operating CAUTION The kit contains ESD sensitive components Handle with care to prevent per...

Страница 35: ...12 V DC 5 10 Minimum current 3 A Maximum current 5 A DC connector size Inner diameter 2 5 mm Outer diameter 5 5 mm Shaft 9 5 mm female center positive Efficiency level V A recommended power supply is Digi Key part number 271 2718 ND or equivalent NOTE External Power Supply Regulatory Compliance Certifications Recommend selection and use of an external power supply which meets TI s required minimum...

Страница 36: ...ash the eMMC of the NIRscan electronics 3 Download and unzip the Win32DiskImager software into a folder on the PC This software creates and installs the flash image on the micro SD card 4 Run the Win32DiskImager application A small window displays a Help link Use this to find answer to questions regarding program usage 5 Place a blank micro SD card into the PC SD card slot Within the Win32DiskImag...

Страница 37: ...tation Feedback Copyright 2014 2019 Texas Instruments Incorporated NIRscan EVM Reprogramming Procedure Figure C 1 MicroSD Card Slot 3 Press and hold down switch S2 shown in Figure C 2 while plugging in the power cable Do not use any metal tools or objects as these could short potentially damage the electronics if misplaced ...

Страница 38: ...t 2014 2019 Texas Instruments Incorporated NIRscan EVM Reprogramming Procedure Figure C 2 Boot Switch Location 4 Continue to hold down S2 until any on board LED lights up about 1 second then release S2 5 One or both of two blue LEDs D1 and D2 as shown in Figure C 3 flash on and off erratically This behavior indicates the eMMC is being programmed ...

Страница 39: ...mplete When LED D1 illuminates it indicates that the NIRscan is ready to communicate Plug in the USB cable enter http 192 168 0 10 into the browser URL window hit enter and the NIRscan menu appears C 3 Upgrading the DLPC350 Firmware This section describes how to reprogram the DLP NIRscan EVM with its application software Because the NIRscan firmware version and the DLPC350 version have dependencie...

Страница 40: ... GUI and unplug the USB cable 11 Plug the USB back into the NIRscan If the NIRscan application code has already been updated then the NIRscan is ready to go If not then follow the instructions in C 1 and C 2 to reprogram the NIRscan application code 12 After both are updated the NIRscan is ready to operate Revision History NOTE Page numbers for previous revisions may differ from page numbers in th...

Страница 41: ...se resources are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of these resources is prohibited No license is granted to any other TI intellectual property right or to any third party intellectual property right TI disclaims responsibility for...

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