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8911 WIRELESS ACCELEROMETER FOR PROOF OF CONCEPT

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LoRaWAN 868/915MHz

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ドキュメント名 8911 WIRELESS ACCELEROMETER FOR PROOF OF CONCEPT
ドキュメント種別 製品カタログ
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取り扱い企業 マウザー・エレクトロニクス (この企業の取り扱いカタログ一覧)

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8911 wireless accelerometer for proof of concept、LoRaWAN™ 868/915MHz

te.com 8911 WIRELESS ACCELEROMETER FOR PROOF OF CONCEPT LoRaWAN™ 868/915MHz SPECIFICATIONS  Wireless Piezoelectric Proof of Concept (POC)  Accelerometer for Condition Monitoring  Programmable, Customer Configurable  Corrosion Resistant Stainless-Steel & Polymer Housing  Wide Bandwdith to >10kHz  Exceptional Long Term Stability Superior Measurement Resolution INTRODUCTION The TE model 8911 wireless accelerometer for POC combines a sensor, data collector, digital signal processor, and radio into one FEATURES compact, battery-operated device that measures both vibration  and temperature data.  Acceleration and temperature output Compact design, stud mount The model 8911 wireless accelerometer uses the LoRaWAN™  Up to 5-year battery life communication protocol, offering a simple, reliable and secure  Low power consumption means of expanding condition-based maintenance into plant  areas where the cost to install wired systems is prohibitive, -20°C to +60°C making data available to existing process control and information  operating temperature systems. 30kHz resonant frequency The model 8911 incorporates a piezo-electric accelerometer APPLICATIONS which offers a wide bandwidth to >10kHz, outstanding  measurement resolution and superior long-term stability  Remote condition monitoring compared to design using MEMS solutions. Reduced installation – The 8911 contains digital signal processing that provides an FFT  costs no cables analysis of the vibration being sensed. The output data describes  Designed for harsh environments the center frequency, peak value, bandwidth, and percent of the  Quick and scalable deployment total spectral content for the eight most significant acceleration Cost effective monitoring peaks in the vibration signal.  for large plants Secure and interference Because of this feature, the 8911 directly provides the data most free transmission needed to plot trends and monitor changes in the performance and condition of factory machinery. CLICK HERE › *This device has not been authorized as required by the rules of the CONNECT WITH A SPECIALIST Federal Communications Commission. TE CONNECTIVITY SENSORS /// MODEL 8911 03/2021 Page 1
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8911 WIRELESS ACCELEROMETER FOR PROOF OF CONCEPT LoRaWAN™ 868/915MHz ABSOLUTE MAXIMUM RATINGS(1) Parameter Symbol Min Typ Max Unit Notes/Conditions Supply voltage Vdd 3.5 V Replaceable battery Storage temperature TS -40 120 °C Without battery Shock limit gmax 2000 g ESD -2 +2 kV Human body model (1) Maximum limits the device will withstand without damage ELECTRICAL SPECIFICATIONS (Unless otherwise specified, all parameters are measured at 24°C @ 3.0V applied) Parameters Symbol Min Typ Max Unit Notes/Conditions Replaceable CR123 Power Supply Vdd 3 Vdc Battery Average supply current Iavg 35 µA Peak supply current Ipk 50 mA During Xmit Resolution 12 bits Sampling Time 5 Sec Battery Life 5 Years One sample/hr (SF7) OPERATING SPECIFICATIONS (ACCELEROMETER) (Unless otherwise specified, all parameters are measured at 24°C @ 3.0V applied) Parameter Symbol Min Typ Max Unit Notes/Conditions Dynamic range ±50 g Frequency response 1 10k Hz ±1db Frequency response 1 15k Hz ±3db Resonant frequency fo 30 kHz Transverse sensitivity 5 % Temperature sensitivity Tc -10 5 % From -20 to 60°C Non-linearity ±1 % FSO Resolution 12 bits Residual noise 0.06 g RMS OPERATING SPECIFICATIONS (TEMPERATURE SENSOR)(1) (Unless otherwise specified, all parameters are measured at 24°C @ 3.0V applied) Parameter Symbol Min Typ Max Unit Notes/Conditions Temp measurement range Tr -20 60 °C Accuracy ±1.5 °C Resolution 12 bits (1)The temperature sensor is located inside the sensor enclosure. As such, it provides the temperature of the sensor interior, not the ambient temperature around the sensor, nor the temperature of surface to which the sensor is mounted. TE CONNECTIVITY SENSORS /// MODEL 8911 03/2021 Page 2
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8911 WIRELESS ACCELEROMETER FOR PROOF OF CONCEPT LoRaWAN™ 868/915MHz ENVIRONMENTAL SPECIFICATIONS Parameter Symbol Min Typ Max Unit Notes/Conditions Operating temperature -20 60 °C Storage temperature -40 120 °C Without battery Ambient humidity 0 95 % Non-condensing EMI/RFI/ESD protection IEC61000-4-2, ICE61000-4-6 Ingress protection IP 66 External exposed surfaces: 316L stainless steel Media compatibility POM polymer EPDM o-ring Weight 200 grams COMMUNICATION SPECIFICATIONS Parameter Symbol Min Typ Max Unit Notes/Conditions Wireless protocol LoRaWANTM Class A Other frequencies 868 (EU) Operating freq (region)(1) MHz available 915 (USA) Contact factory Transmit power 12 14 dBm Receiver sensitivity -131 -137 dBm Activation OTAA Custom keys available Activation keys Factory defined Contact factory (1)Each operating frequency is part number specific BLOCK DIAGRAM TE CONNECTIVITY SENSORS /// MODEL 8911 03/2021 Page 3
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8911 WIRELESS ACCELEROMETER FOR PROOF OF CONCEPT LoRaWAN™ 868/915MHz TYPICAL ACCELEROMETER FREQUENCY RESPONSE CURVE TYPICAL TEMPERATURE RESPONSE CURVE TE CONNECTIVITY SENSORS /// MODEL 8911 03/2021 Page 4
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8911 WIRELESS ACCELEROMETER FOR PROOF OF CONCEPT LoRaWAN™ 868/915MHz DIMENSIONS TE CONNECTIVITY SENSORS /// MODEL 8911 03/2021 Page 5
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8911 WIRELESS ACCELEROMETER FOR PROOF OF CONCEPT LoRaWAN™ 868/915MHz MOUNTING CONSIDERATIONS AND ACCESSORIES A solid mounting method is required to get optimum performance from the accelerometer. Any loose parts or unsecured mounting features will introduce noise and corrupt the signals of interest. Shown below are six different mounting options available for the 8911 accelerometer for proof of concept. ¼-28 UNF-2A THD 1/4-28:1/4-28 Male Stud 1/4-28 UNF Female THD P/N AC-D03636 (Integrated part of the sensor) ¼-28 UNF-2A THD ¼-28 UNF-2A THD M6 x 1.0-6g THD Adhesive Mounting Stud 1/4-28:M6 Male Stud P/N AC-D04210 P/N AC-D03665 ¼-28 UNF-2A THD ¼-28 UNF-2A THD M5 x 0.8-6g THD Keeper (removeable) 1/4-28:M5 Male Stud Magnetic Mounting Stud P/N AC-D03664 P/N AC-A04209 For the adhesive mounting stud, secure with a rigid adhesive such as epoxy or cyanoacrylate. Do not use pressure sensitive adhesives or foam tapes. For the magnetic mounting stud, remove the keeper prior to attachment. The magnetic mounting will have a 30 lb pull strength when attached to a ferrous surface. TE CONNECTIVITY SENSORS /// MODEL 8911 03/2021 Page 6
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8911 WIRELESS ACCELEROMETER FOR PROOF OF CONCEPT LoRaWAN™ 868/915MHz LoRaWAN™ Uplink Payload 0 1 2 3 4 5 6 7 8 9 10 11 12 13 Battery n Temperature Total Energy Integration Peak 1 Peak 1 Peak 1 Peak 2 Peaks (LSB First) (LSB First) Size Frequency Magnitude Ratio … Detected (LSB First) (LSB first) (LSB first) - Frequency, Magnitude, Ratio pattern will repeat n times, once for each peak. - Total Energy is the total energy (integrated over the whole FFT) - Integration Size is the size of the integration around the peak. For each peak detected, the embedded algorithm will integrate over a range around the peak to measure the relative energy around this peak, and will also have the effect to disable detection of new peaks around this detected peak - Frequency is the center frequency of the peak detected - Magnitude is the magnitude value of the peak detected - Ratio is the locally integrated (over ‘Integration Size’ Hz) around this peak compared to the total energy Data conversion: Parameter Range Resolution Offset Hex Data Range Error code Battery (%) 0 - 100 1% / bit 0% 0x00 to 0x64 0xFF Temperature (°C) -20 to 60°C 0.1°C / bit -100°C 0x0050 to 0x00A0 0xFFFF Total Energy (g) 0 - 40 0.001g / bit 0g 0x0000 to 0x9C40 N/A Integration Size (Hz) 0 - 18000 1Hz / bit 0Hz 0x0000 to 0x4650 N/A Frequency (Hz) 0 - 18000 1Hz / bit 0Hz 0x0000 to 0x4650 N/A Magnitude (g) 0 - 40 0.001g / bit 0g 0x0000 to 0x9C40 N/A Ratio (%) 0 - 100 1% / bit 0% 0x00 to 0x64 N/A - Custom payload configurations available upon request. The number of peaks detected by the algorithm is currently fixed at 8. This leads to a minimum LoRaWAN™ payload size of 48bytes, preventing the SF12 to be used in the US 915 configuration. Consequently, even if the network requests the device to use SF12, the device will use SF11 as the payload would not fit in the SF12 frame. LoRaWAN™ Configuration Downlink Payload The device sampling period can be adjusted by sending a downlink LoRaWAN™ frame in the following format: 0 1 2 3 4 0x02 Sampling period in minutes (MSB first) Minimum sampling period is 1-minute, maximum period is 1440 seconds (24 hours) Example of a measurement interval set to 20min: 0200000014 TE CONNECTIVITY SENSORS /// MODEL 8911 03/2021 Page 7
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8911 WIRELESS ACCELEROMETER FOR PROOF OF CONCEPT LoRaWAN™ 868/915MHz WORKFLOW When the sensor powers up it performs a self-diagnostic then tries to join the LoRaWAN™ network using OTAA. The sensor tries to join the network every 10 second and increases the join timer at every failed attempt by 20%, up to 1 hour maximum. After a successful join the sensor enters sampling mode. Once a LoRaWAN™ network has been joined, the sensor will loop through this workflow with a user defined period. If the LoRaWAN™ transmission fails too many times the sensor will consider it has left the LoRaWAN™ network and will go back to joining a network. - Pressing the push button on the sensor at any point during the sensor’s life cycle will automatically trigger a new capture and data analysis. BATTERY LIFE The Sensor battery life will greatly depend on LoRa® spread factor (SF), therefore on sensor proximity from a gateway and network quality. Theorical lifetime 10 8 6 4 2 0 0 2 4 6 8 10 12 14 16 18 20 22 24 Transmission period (hours) SF11 SF9 SF7 TE CONNECTIVITY SENSORS /// MODEL 8911 03/2021 Page 8 Lifetime (year)
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8911 WIRELESS ACCELEROMETER FOR PROOF OF CONCEPT LoRaWAN™ 868/915MHz USING AND DISPLAYING DATA FROM THE SENSOR The sensor vibration data in its FFT format can be used to construct visual displays and tables that provide significant information regarding the operation and health of the machinery to which it’s attached. Examples are shown below: Raw Data: Basic Data Table: Peak Frequency (Hz) Amplitude of Peak % of Total Spectral Energy 2056 168 23 2882 46 10 694 25 5 8 23 3 4122 20 5 5994 15 2 3805 12 4 1713 10 2 Total Energy 2.605g FFT Visual Display: TE CONNECTIVITY SENSORS /// MODEL 8911 03/2021 Page 9
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8911 WIRELESS ACCELEROMETER FOR PROOF OF CONCEPT LoRaWAN™ 868/915MHz CONTROLS AND INDICATORS The sensor has a single push button and 2 LEDs that indicate its status, one blue and one red.  Pressing the push button on the sensor at any point during the sensor’s life cycle will automatically trigger a new capture and data analysis. This is useful when setting up the sensor in an application. No waiting for a data capture from the normal cycle.  Blue LED: - will light-up for two seconds when sensor requests to join LoRaWAN™ network, and receives join acceptation - will light-up shortly when sensor samples data, transmits LoRaWAN™ payload, receives  acknowledgement Red LED: - will light-up for two seconds if the LoRaWAN™ network join request is not accepted - will light-up short shortly if a transmitted LoRaWAN™ payload is not acknowledged  Illumination of the colored LEDs can be seen through the translucent cover when it’s attached.  To gain access to the push-button and indicator LEDs, simply unscrew the top portion of the sensor housing and locate these components on the PC board. See image below. TE CONNECTIVITY SENSORS /// MODEL 8911 03/2021 Page 10
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8911 WIRELESS ACCELEROMETER FOR PROOF OF CONCEPT LoRaWAN™ 868/915MHz ORDERING INFORMATION 8911-x Part Number Part Description Tx/Rx Frequency 20011588-00 8911-A Wireless Accel for POC 915 MHz (USA) 20008458-00 8911-E Wireless Accel for POC 868 MHz (EMEA) Mounting Accessories Part Number Description AC-D04210 Adhesive Mounting Stud AC-A04209 Magnetic Mounting Stud AC-D03636 ¼ x 28 by ¼ x 28 Double-ended Male Stud AC-D03665 ¼ x 28 by M6 Double-ended Male Stud AD-D03664 ¼ x 28 by M5 Double-ended Male Stud Note – Unit is shipped without a battery. Batteries are available from any of our distribution partners or at most retail locations that sell batteries. *This device has not been authorized as required by the rules of the Federal Communications Commission. CLICK HERE › CONNECT WITH A SPECIALIST NORTH AMERICA EUROPE ASIA Tel +1 800 522 6752 Tel +31 73 624 6999 Tel +86 0400 820 6015 te.com/sensors TE Connectivity, TE, TE Connectivity (logo) and Every Connection Counts are trademarks. All other logos, products and/or company names referred to herein might be trademarks of their respective owners The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However, TE Connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall only be as set forth in TE Connectivity‘s Standard Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application. © 2021 TE Connectivity Corporation. All Rights Reserved. 03/2021 TE CONNECTIVITY SENSORS /// MODEL 8911 03/2021 Page 11