Nathan runs a firm that rents high end amplifiers and sound equipment to musicians, performers and rock bands. While plenty his clients hire experienced electricians, others cobble together the equipment and cabling which could cause equipment to overheat.
The less experienced renters may not be aware of voltage drops and cable run limits across stage floors. Reduced voltage at the remote end creates high internal equipment temperatures and combined with increased ambient temperatures from stage lights, and cables overheating stage equipment can be damaged or have its lifetime reduced. Sensitive electronic components wear out faster than Nathan expected, meaning increased maintenance and replacement costs all costs that are passed on to his clients.
Even with careful contract language, how can Nathan monitor and verify operating temperatures to protect his investment or charge when he knows the equipment may be over-heated?
HF RFID Enabled Sensing
Melexis has came up with MLX 90129 sensor IC that can be matched with multiple sensor inputs and look at with a 15.56MHz Radio Frequency IDentification (RFID) reader from Proxima RF. Using the MLX 90129, a simple, cost effective temperature data-logger might be attached to rental equipment to verified operating temperatures having a handheld reader on rental return.
The read/write sensor IC has an inside temperature sensor and three additional inputs for sensing or monitoring. By combining resistive sensing with passive high frequency (HF) RFID, Melexis opens the door to new sensing applications that previously were difficult accomplish. As a bonus, the HF RFID can use unique product identifiers for inventory and rental control plus could be password protected for additional security.
What Can Be Sensed?
The Melexis sensor IC can supply for more than just temperature sensing. Combined with virtually any resistive sensor on the decision of three sensors or monitoring ports, the sensor IC offer you data through proximity RFID for monitoring applications that include:
=> Strain or force sensors to measure small movement, stretching, weight
=> Pressure sensors (air, liquid pressure, vacuum)
=> Flow (liquid or gas)
=> Temperature, humidity
=> Electrical voltage, resistance and current
=> Tampering, tilting, breaking a seal
=> Proximity of nearby objects or linear position
=> Shock, rotational speed, angular position, and light
=> Run time, duty cycles, on/off
Battery-Less Sensing or Data logging?
The combined Melexis 90129 sensor IC and sensors can be encased in a good many different form factors; from tiny, inexpensive plastic housings to water-proof and high temperature enclosures. Review sensor could be embedded in equipment or new construction to create an 'in situ' battery-less sensing product for taking data attending a particular point. The low power sensor IC with passive 10.56MHz interface draws power from the HF reader produced by Proxima RF this energy harvesting means designers can embed sensors in services equipment where water and liquid undoubtedly problem for ultra-high frequency (UHF) RFID.
By adding a battery, the sensor becomes a data logger taking data points on once schedule matched to application needs.
Why High Frequency for Sensors?
HF can be a 'proximity' read technology that has a short read range. Shorter read ranges are useful where personal, human intervention is preferred or is definitely part on the standard operating procedure while in healthcare, high security applications or with mission critical or sensitive items. Personal interaction allows human verification of your read as well as the environment, include redundancy in the system. It is definitely read range ensures 100% reads without interference or need for anti-collision software as is required with longer read active UHF technology used instantly locating and inventory communities.
High frequency 13.56MHz RFID has superior performance characteristics in and around liquids making it a logical choice for use with sensor systems used to monitor foodstuffs, beverages and liquid products either in process control, manufacture, transport or garage area.
The proximity read nature of passive 13.56MHz RFID results much less than ambient emissions a benefit in healthcare applications or anywhere emissions could produce a concern with sensitive electronic equipment. The recent HIBCC ANSI seven.0 standard specifically recommends use of HF in healthcare to reduce concerns that active UHF may restrict sensitive machine.
HF Readers Desktop or Mobile
The MLX 90129 based sensors could be read with all the off-the-shelf Proxima RF USB Desktop Reader or the AV-X mobile reader. The FCC/CE USB Desktop Reader has an enclosed antenna so no extra parts are essential. The small polycarbonate box pulls power of the USB connection and the LED for visual read confirmation.
The Proxima RF AV-X mobile HF reader was created specifically for that rugged Psion Teklogix Workabout Pro production. The reader is designed to promote the other radios inside the handheld device the operator can sustain your WiFi, bar-code scanner or GPS running while making the HF discover. Since many users require mobile reads, the AV-X is is an excellent fit for HF-enabled sensor applications.
Developing Applications for HF RFID Enabled Sensors
Melexis and Proxima RF have partnered to make the DVK 90129 kit so sensor designers can easily evaluate capabilities on the MLX 90129 sensor Ed. The kit includes an evaluation board pre-populated using a temperature, light sensor coupled with a potentiometer. The evaluation board is read with the USB HF Desktop Reader from Proxima RF. The kit includes powerful drag & drop dashboard software programs. An optional key fob style temperature sensor (ST-KF1) can be ordered whilst kit for developers who may be considering trialing sensor in an application ready form factor.
The DVK 90129 is offered from Future Electronics or maybe local Melexis representative.
Why Rock Bands Should Care
Nathan, gear renter, is much like any business person; he needs to ensure he provides quality product, protects his investment and keeps costs down. If he finds his equipment lifetime is shortened by overheating, he will simply charge more. But everyone saves time, money and headaches by instantly verifying operating temperatures using a simple, mobile reader. And Rock Bands can return to making tracks.