ELEC 464 Wireless Communications: T7 Series Labjack
Requirements for Wireless Transmitter:
Performance Requirements:
- Operating range maximum of 50 feet.
- Required sampling rate 1 kHz and preferred rate 10 kHz
- The communication protocol must be easy and simple for the operator to use and it must be a simple GUI guided selection
- ZigBee or Bluetooth, communication protocol must be compatible for this project.
Physical Requirements:
- Shock proof rating should meet at least one meter. If the transmitter dropped from one meter height, it should be operational after the accident.
- The transmitter, battery, and signal conditioner needs to be a compact unit, small enough to fit into a compact enclosure. Need to research for the smallest transmitter in the market. The target size needs to be determined for the electrical enclosure (120 mm x 60 mm x 60 mm).
- Depends on the transmitter, may require a signal conditioner for load cell to amplify the signal. The type of sensor should be selectable by the user since it is involved with different types of sensors.
Environmental Requirements:
- The wireless transmitter should operate across a wide temperature range (-40C to 80C and Humid condition 38C, 95%).
- The transmitter should meet IP 55 requirements minimum.
Cost Requirements:
- The unit must be cost effective and competitive to the market, target price for a transmitter is 500$.
Electrical Requirements:
- An external power source to power the sensor if the transmitter doesn’t have that option? A power source such a rechargeable battery or wall plug in 12 volts power adapter.
Requirements for Wireless Receiver:
Performance Requirements:
- Operating range maximum of 50 feet.
- The receiver should receive a signal from the thermal chambers when the transmitter is inside the chambers.
- Required sampling rate 1 kHz and preferred rate 10 kHz
- The communication protocol must be easy and simple for the operator to use and it must be a simple GUI guided selection
- The receiver should be capable of receiving signals from different transmitters and identify the source transmitter and the receiver should be capable to handle at least three transmitters at a time.
- ZigBee or Bluetooth, communication protocol must be compatible for this project.
Cost Requirements:
- The unit must be cost effective and competitive to the market, target price for a transmitter is 500$.
Electrical Requirements:
- An external power source to power the sensor if the receiver doesn’t have that option? A power source such a rechargeable battery or wall plug in 12 volts power adapter.
Environmental Requirements:
- Receivers should receive signals from transmitters that are located in metal chambers without any interruption
Answer:
Wireless solution and technology: T7 Series Labjack
The Labjack T7 USB or Ethernet is multifunctional DAQ equipment that has 14 analog inputs (ranges between 6-18 bits) and 2 outputs (ranges 12 bits). It has 23 digital I/O and 10 counters timers as well.
Performance requirement
The T7 series Labjack provides high range of
flexibility to the users and very much useful for receiving signals from the virtual sensors. It holds three different communication interfaces and the can serve senor data through those interfaces (Osseiran et al. 2016). The low latency sampling and control system of T7 series is made up with easy command response Modbus messages. The waveform is generated required to be generated from stream out.
Physical requirement
- The system is competent of stand-alone operation by running Lua scripts.
- It must provide resolution setting for different software configuration
- Stream mode is needed to be used to deliver high speed configurable sampled rate
- Both the single ended input and differential inputs are needed to deliver the desired outcome of T7 series (Sturmer et al. 2016).
- There are different options of communications such as the through USB, Ethernet and 802.11b/g.
Environmental Requirements
- The product named as T7-PRO Labjack, is required to be operated in a perfect temperature range. After analyzing the product it has been found that the minimum temperature in which the device can operate accurately is -40 and the maximum temperature is 85. It also serves actively monitored and highly informative forums on which the users can share their views and thoughts to others.
- For configuration, testing and logging data to the files it also serves free applications to the users (Magno et al.2015). These devices can be operated over any platform that supports the TCP/IP (Transmission control protocol).
- In order to convert voltage to either pressure or temperature simple slope or offset is required. Thermo couples, load sells and even bridges are also required to make the systems operates efficiently.
Cost requirement
The technical information of t7 pro Labjack includes different cost requirements such as in general the input is14XAnalog, 23X digital I/O and in maximum temperature it could operate efficiently. The measurement cost of t7 pro Labjack is higher than the others and the width, height and depth in which it could be operated are respectively 152 mm, 66 mm and 16 mm (El-Kader and El-Basioni 2013). Moreover, it could be stated that, the unit of the t7 pro Labjack should have to cost effective and competitive in the marketplace. Though based on the types and other features of the products the price range varies.
Electrical Requirements
The sampling rate of Labjack t7 pro is 100 Hz and for building essential communication bridge between the receiver and the transmitter Ethernet or 802.11b/g WI Fi is needed to be used by the users. In order to make this communication, the communication frequency changes as per the changing requirements. The power needed to operate the t7 PRO Labjack is 5VDC and the input voltage range of this device are ±10V, ±1V, ±0.1V and ±0.01V.
References
El-Kader, S.M.A. and El-Basioni, B.M.M., 2013. Precision farming solution in Egypt using the wireless sensor network technology. Egyptian Informatics Journal, 14(3), pp.221-233.
Magno, M., Polonelli, T., Benini, L. and Popovici, E., 2015. A low cost, highly scalable wireless sensor network solution to achieve smart LED light control for green buildings. IEEE Sensors Journal, 15(5), pp.2963-2973.
Osseiran, A., Braun, V., Hidekazu, T., Marsch, P., Schotten, H., Tullberg, H., Uusitalo, M.A. and Schellman, M., 2013, June. The foundation of the mobile and wireless communications system for 2020 and beyond: Challenges, enablers and technology solutions. In Vehicular Technology Conference (VTC Spring), 2013 IEEE 77th (pp. 1-5). IEEE.
Sturmer, J., Seifahrt, A., Schwab, C. and Bean, J.L., 2016. A rubidium-traced white-light etalon calibrator for radial velocity measurements at the cm/s level. arXiv preprint arXiv:1607.05172.
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