Temperature Logging System (TLS)
from TASK Aerospace, Inc.
Part Number: 44-6001
Autonomously Record, Store and Report temperature data for up to 12 years in critical conditions.
Periodic replacement of CAD and PAD devices in emergency egress systems is a significant cost driver in the DoD sustainment budget. Driven by environmental exposure, whether in storage or installation, the shelf/service life is largely dependent upon environmental exposure with temperature being one of the key factors. If the cumulative exposure of each individual CAD and PAD to temperature was known, the potential for extending service lives of individual devices could result in risk reduction as well as significant cost saving over the life of a weapons system. The Temperature Logging System (TLS) is a small autonomous device specifically designed to collect and record environmental data over time. Attached to, or placed in the vicinity of, a CAD or PAD, or any other temperature sensitivity item, the TLS is capable of measuring and recording for years without human intervention. The unique features of the TLS is that downloading recorded data can be accomplished wirelessly at any time from a distance of up to 30 feet into a simple and easily manageable format. There are a wide range of applications and benefits.
Safety, Surveillance and Learning
What if you could see the real-time environments that a system or component ACTUALLY sees during its lifetime?
- What if you had that data for a failure investigation?
- What if you had that data when a request for Service Life Extension was made?
With Task Aerospace’s Temperature Logging System, these answers are possible.
Now a Maintainer can walk up to an aircraft with a handheld device and tell the history (Recorded Data) and identity of the component (or any other system) that is on the aircraft.
Task Aerospace, Inc. has developed the Temperature Logging System (TLS). TLS has recently completed design and First Article units are in the field testing. The TLS is comprised of commercial components readily available, configured to perform as the commercial item called TLS.
The design of the Temperature Logging System consists of any number of sensor units, at least one radio/Bluetooth device and the software that manages it all. The system has been designed to be compatible with technology growth.
• Records Date (Std or Julian)
• Recording Time (Military/International Format, 0000 to 2399)
• Records units serial number, reports out unit serial number
• Records Temperature Data (F or C)
• Other environments optional with additional capabilities
• Variable/adjustable sampling intervals
• Records data up to 5 years without service
TECHNICAL DESIGN APPROACH
• Commercial Off-The-Shelf Technology (COTS)
• Integral/Self-contained Power Supply
• Non-Volatile Data Storage
• Bluetooth interface
• USB-Port compatible Radio receiver for downloading data
• Data exportable to Excel / .csv format (Comma Seperated Values)
• 5 year Recording Life
• Environmentally Sealed Case
• Common Aircrew Battery
• Temperature Controlled Storage
• Chemical Storage
• Manufacturing Areas
• Critical Temperature Controlled Facilities
• Freight and Cargo Environments
• Pharmaceutical Storage and Shipment
• Explosive and Pyrotechnic Component Application
• Autonomously collect and record environmental data
• Date/time-stamped for each temperature recording incident
• Each downloaded report is logged
• Ability to report-out through no-contact handheld device
• Adjustable recording intervals/mission-adaptive logging intervals
• Wireless readable on PC based Bluetooth device
• Download recordable data into a manageable format (i.e. MS Excel readable)
• Maintains Data Integrity without power being applied to the TLS
• Service life up to 5 years (depending on recording interval and data-read intervals
• FCC Compliant and meets the requirements of an Aircraft Cockpit Environment
• Small device: 77mm x 37mm x 22.95mm (3″ x 1.5″ x 0.90″)
• Operate safely in an Explosive Environment
• Operate safely in the immediate vicinity of explosive materials
• Operate within aircraft cockpit
• Does not interfere with or effect aircraft or its subsystems
• Operate in temperature range from -67ºF to +266ºF (-55ºC to +130ºC)
• Unique ID and Serial Number for each collecting device, reported within data
• TLS is capable of adding additional recording (such as vibration, shock, humidity, ect.)
• Password Protected/Resettable
THE TLS SET – PART NUMBER 44-6001
• Includes 2 sensors/Data Loggers, Software, 1 USB Radio and 2 pouches
• Additional Sensors/Data Loggers and USB Radios are purchased separately.
TLS Data Logger
External dimensions: ~ 3″ by 1.5″ by 0.90″ Nominal weight: 1.65 oz (46 g)
1 – What are the systems dimensions and it’s weight?
- External dimensions are roughly 3″ by 1.5″ by 0.90″.
- Nominal weight: 1.65 oz (46 g).
- Provisions for mounting are not included in these dimensions. Each sensor unit measures as described.
- Task offers a container with Velcro straps and a sliding case that allows the user to wrap around a fixture to make the attachment. Due to the many various applications, this offers a generic way to attach to many different items. The strap is 12″ long and allows for complete adjustment through the Velcro’s flexibility to attach to any location.
2 – What temperature range can the system withstand without malfunctioning? Register and record?
- Temperature sensor operating range is: -55º C to +125ºC (-67ºF to +257ºF)
- Battery Operating Temperature Range is: -55ºC to +130ºC (-67ºF to +266ºF)
3 – What environment has the item been subjected to in terms of vibration, pressure, shock, humidity, salt fog, and dust/sand?
- TLS sensors use a permanently sealed dove tail to simply and inexpensively provide protection against the standard range of Mil-STD-810G environments.
4 – Is the system susceptible to performance degradation or the data loss due to electro-magnetic interference (EMI)?
- The TLS sensor RF components all operate in a designated ISAM frequency that military system are designed to avoid and not interfere with.
5 – Does the System transmit signals?
- The TLS sensor RF elements are unmodified Bluetooth 4.0 Low Energy devices certified to be compliant with FCC regulations for worldwide usage at the 2.4Ghz ISAM frequency. The following is the specific FCC statement:
- FCC NOTICE – The device PAN17, for details refer to Chapter 22, including the antennas, which are listed in 28.5, complies with Part 15 of the FCC Rules. The device meets the requirements for modular transmitter approval as detailed in FCC public Notice DA00-1407.transmitter Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation.
6 – What sample rate(s) can the system operate at?
- Sample rates available are user defined at one temperature sample every 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, or 30 minutes, or 1, 2, 3, 4, 6, 8, 12 hours. These sample rates were chosen to encompass the range from far less than the thermal equilibria time of a typical CAD/PAD device being monitored to the time intervals that would be on the maximum of what would be needed to track diurnal thermal cycling. These durations are considered default durations or rates. Due to the simplified design of the sensor and the applicable software, it is possible to apply user detail or even to ignore certain data if requested by a customer. These features would reduce the amount of data to be stored which in turn increases the monitoring-life and reduces the data extraction time while increasing the data resolution in the ranges of interest.
7 – What is the data storage capacity?
- The current TLS can store approximately 18,500 temperature sample/annotations. This represents 2 years of monitoring data at a data record rate of 1 sample per hour. With Dynamic date recording, this will allow increased detail during thermal events and to increase the overall monitor time to potentially several years. For example, at thermal sampling rate of once per 10 minutes and a dynamic data recording rate of once every 6 hours at a temperature below 100ºF and once every 10 minutes (estimated minimum thermal equilibria time of a CAD/PAD device) the TLS could monitor and record for approximately 7 years.
8 – What is the service (operating) life of the system? If this varies under different conditions, what is the service life for those conditions?
- Based on operation and mission requirements, design features have been incorporated into the hardware and software that would allow operation life to be extended to 10 years and to also provide the option if required to shutdown all RF emissions.
9 – How is data transferred? What is the data retrieval interface?
- The data is transferred with full error detection and correction as a serial data stream over the Low-Energy data link to a laptop configured with the Data Tools software and a Low-Energy USB radio. The Data Tools software converts the serial data stream into a simple ASCII *.CSV data file which is stored on the laptop for analysis using any standard spreadsheet program such as EXCEL or Open Office. The Data Tools software also allows the user to define temperature units (F/C) and sampling/data recording rates.
For more information, Contact Tony Nikopoulos
Sample TLS Data at 30-Minute Sampling Intervals
There are many applications for the TLS. Applications where temperatures effects on the life or performance of an item or a system can now be monitored and actual temperature recorded and tracked over time. Consider the possibilities. For this example, we address life limited, environmentally sensitive items in an aircraft. Typically, systems and components are tested through accelerated aging to prove performance through a temperature range over a predetermined time. This approach is based on generally known environments.