Campbell-scientific Wireless Sensor Network (CWB100, CWS220, and CWS90 Uživatelský manuál

Wireless Sensor NetworkRevision: 9/11Copyright © 2010-2011Campbell Scientific, Inc.

Wireless Sensor Network station synchronizes wireless sensor measurements and polls all sensors, storing the collected measurements so that it can tra

Wireless Sensor Network 1.3 CWS220 Wireless Infrared Radiometer The CWS220 is a Wireless Infrared Radiometer that incorporates Apogee Instrument&apos

Wireless Sensor Network 1.4 CWS655 Wireless Water Content Reflectometer The CWS655 is based on Campbell Scientific’s CS655 water content reflectomete

Wireless Sensor Network The CWS655 outputs 8 values: Volumetric water content, Bulk electrical conductivity, Dielectric permittivity, Soil temperature

Wireless Sensor Network TABLE 1.5-1. CWS900 Configurations and Outputs Configuration Output Single Ended Channel 1, V Single Ended Channel 2, V

Wireless Sensor Network TABLE 1.5-2. CWS900 Wind Sensor Configurations and Outputs Configuration Output Wind Speed Average, m/s Wind Speed Maximu

Wireless Sensor Network 2. Specifications 2.1 Wireless Sensor Network Radio The CWB100 and CWS sensors use a 25 mW FHSS radio. Three models are ava

Wireless Sensor Network 2.1.2 Typical RF Range RF range is affected by antenna height and by obstacles between the two antennae. The following range

Wireless Sensor Network 2.1.5 Antenna Options All CWS wireless sensors contain a built-in 0 dBd 1/4 wave antenna. No other antenna options are availa

Wireless Sensor Network Terminal Block Connector: Bi-Directional Serial datalogger connection USB Port: Computer connection for configuration Antenn

Wireless Sensor Network 2.3.2 CWS220 Electrical Specifications Power: 2 AA Batteries Average Current Drain: 300 μA with 15 minute polling Radio: Int

Wireless Sensor Network 2.4.3 CWS655 Environmental Specifications Temperature Range: -25° to +50°C (-13° F to + 122°F) Humidity Range: 0 to 100% W

Wireless Sensor Network 2.5.3 CWS900 Environmental Specifications Temperature Range: -25° to +50°C (-13°F to + 122°F) Humidity Range: 0 to 100% Wea

Wireless Sensor Network FIGURE 3.1-1. A205 CWS to PC Interface FIGURE 3.1-2. Connection of A205 3.1.2 Required Cables A data cable, CSI part num

Wireless Sensor Network 3.1.3 Configuration CD A Configuration CD ships with each CWB100 Wireless Base Station. The CD has software and files needed

Wireless Sensor Network are specified. As the network is being designed, Wireless Sensor Planner automatically determines many individual device set

Wireless Sensor Network 3.2.3.1 Simple WSN Example In this example, a CWB100 base station communicates with a CWS655 and a CWS900 with a 109-L-CWS te

Wireless Sensor Network Adding Communication Links to Devices The next step is to add links between the base station and the other two devices. Th

Wireless Sensor Network To add the link from the CWB100 to the CWS900, select the CWB100 and drag the resulting line to the CWS900. Another Add Link

Wireless Sensor Network The Radio ID may be left blank and will be filled in automatically when the device is programmed. Use the Measurement Configu

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Wireless Sensor Network shown. To save these settings in a XML file for future reference, click Save and choose a filename. To send these settings t

Wireless Sensor Network 3.3.2 Configuring the CWS655 To configure the CWS655 Water Content Reflectometer, first connect the A205 to the type B USB co

Wireless Sensor Network 3.3.3 Configuring the CWS900 To configure the CWS900 Wireless Sensor Interface, first connect the A205 to the type B USB conn

Wireless Sensor Network transmitted by wireless sensors. See Section 4.2.1 for more information on the format and use of the configuration string. Af

Wireless Sensor Network Determining Size of the Array In this example the WSN includes a CWS655 and a CWS900 configured to measure a 109 temperature p

Wireless Sensor Network Finishing the Program Add a one minute data table and CallTable instruction to complete the program Public WSN(12) DataTable

Wireless Sensor Network Power the CWS sensors by attaching the battery pack to the 4-pin connector. The red LED light will hold steady for about 4 se

Wireless Sensor Network 3.9.2 Connecting Sensors to the CWS900 For sensors that are compatible with the CWS900 but do not have the –LWS connector opt

Wireless Sensor Network TABLE 4.1-1. Values Transmitted by CWS Sensors Sensor Values Transmitted CWS220 Wireless Infrared Radiometer 5 CWS655 Wirel

Wireless Sensor Network Configuration: The Configuration parameter is an optional constant string parameter that specifies a list of sensor descripti

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Wireless Sensor Network discovered. This can make it difficult to use specific values in the datalogger program because of uncertainty as to which po

Wireless Sensor Network 4.3 ArrayIndex() Instruction The ArrayIndex function is used to return the index of a named element in an array which would o

Wireless Sensor Network in the array for program use regardless of the order in which the sensor was discovered. CRBasic instruction Fieldnames is use

Wireless Sensor Network Port: The Port parameter is a constant indicating the control port (C1, C3, C5, or C7) to which the CWB100 Data line is conne

Wireless Sensor Network Example 4.6-1. Program for Wireless Sensor Network Const NumVals = 4 'Values returned by CWS900 Public GetRSSI As Boole

Wireless Sensor Network 5. CWS Button and LED Behavior The Setup button on the back of a CWS sensor and the RED and BLUE LED lights provide diagnosti

Wireless Sensor Network 2. If the initial attempt fails to link to the base station, the CWS sensor will delay 5 minutes before attempting to link

Wireless Sensor Network up whenever a measurement is taken and the red LED will light up whenever the measurements are transmitted to the base station

Wireless Sensor Network Prior to sensor discovery, the numeric monitor will display the name of the public variable specified in the CWB100 instru

Wireless Sensor Network Distilled water or alcohol works well for most dust/dirt. Salt deposits dissolve better in a weak acid solution (~0.1 molar).

Wireless Sensor Network Table of Contents PDF viewers note: These page numbers refer to the printed version of this document. Use the Adobe Acrobat®

Wireless Sensor Network 8. Troubleshooting Symptom Possible Cause Solution Cannot connect to CWB100 with USB cable Wrong serial port number specifi

Wireless Sensor Network Symptom Possible Cause Solution Pressing Setup button for 8-10 seconds does not initiate auto-discovery (Blue LED does not b

Wireless Sensor Network 44 Symptom Possible Cause Solution First element in destination array specified in CWB100 instruction is -3 and all other el

Appendix A. Using DevConfig for CWS Setup CWS Sensors can be configured using Device Configuration Utility, DevConfig, which can be downloaded from w

Appendix A. Using DevConfig for CWS Setup 5. Once DevConfig connects to the sensor, enter the address of the CWB100 in the field called Base Station

Appendix A. Using DevConfig for CWS Setup 7. If configuring a CWS900 sensor module, you can use DevConfig to ensure that the sensor is correctly con

Appendix A. Using DevConfig for CWS Setup A-4

Appendix B. Measurement Names and Meanings Default measurement names are shown in Wireless Sensor Planner, Network Planner, and DevConfig software.

Appendix B. Measurement Names and Meanings B.3 CWS900 Default Names Default Name Meaning Units SE1 Single-ended DC voltage measured on pin 5 with

Appendix B. Measurement Names and Meanings Default Name Meaning Units BV Battery voltage of wireless sensor Volts Ti Internal temperature of wir

Wireless Sensor Network Table of Contents 3.2 Creating a Model of the WSN ... 16 3.2.1 W

Appendix B. Measurement Names and Meanings Default Name Meaning Units RWDSD Resultant wind direction standard deviation. Vector mean wind directi

Appendix B. Measurement Names and Meanings Scalar mean horizontal wind speed, S: S=(Σsi)/N where in the case of orthogonal sensors: Si=(Uei2+Uni2)1/2

Appendix B. Measurement Names and Meanings Standard deviation of wind direction, σ(Θu), using Campbell Scientific algorithm: σ(Θu)=81(1-U/S)1/2 The a

Appendix B. Measurement Names and Meanings The term, (( ') ') /ΘiisNS2∑, is 0 if the deviations in speed are not correlated with the deviat

Appendix B. Measurement Names and Meanings B-8

Appendix C. Battery Life C.1 Battery Characteristics The battery life of the CWS wireless sensors is a function of the polling interval, repeater us

Appendix C. Battery Life Sensor and Connection 5 Min Polling 10 Min Polling 15 Min Polling CWS900 w/109 Probe or CWS655 15 months 21 months 24

Appendix C. Battery Life In another situation, there may be a sensor in a location that permits a direct connection to the base, but misses a signif

Appendix C. Battery Life C-4

Wireless Sensor Network Table of Contents B. Measurement Names and Meanings ... B-1 B.1 CWS220 Default Names...

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Wireless Sensor Network Table of Contents iv

Wireless Sensor Network 1. Understanding a Wireless Sensor Network 1.1 General Description Why wireless? There are situations when it is desirable t