Patent
Radiation beam calorimetric power measurement system
TLDR
In this paper, a radiation beam calorimetric power measurement system for measuring the average power of a beam such as a laser beam, including a calorimeter configured to operate over a wide range of coolant flow rates and being cooled by continuously flowing coolant for absorbing light from a laserbeam to convert the laser beam energy into heat.Abstract:
A radiation beam calorimetric power measurement system for measuring the average power of a beam such as a laser beam, including a calorimeter configured to operate over a wide range of coolant flow rates and being cooled by continuously flowing coolant for absorbing light from a laser beam to convert the laser beam energy into heat. The system further includes a flow meter for measuring the coolant flow in the calorimeter and a pair of thermistors for measuring the temperature difference between the coolant inputs and outputs to the calorimeter. The system also includes a microprocessor for processing the measured coolant flow rate and the measured temperature difference to determine the average power of the laser beam.read more
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Patent
Pocket size laser power meter
TL;DR: In this paper, a pocket size laser power meter is used to measure the power of the laser energy emitted by a laser, and a differentiator coupled to the temperature sensor produces a differentiated signal indicative of the rate of change of voltage of the electrical sensor signal.
Patent
Laser power meter
TL;DR: In this paper, a laser power meter with an absorber placed in the path of a laser beam during a power measurement, a temperature sensor for measuring the temperature of the absorber, and a processor that computes an estimated power of the laser beam based on the temperature and its rate of change without considering power related loss effects is described.
Patent
Method and apparatus for conducting performance test to heat pipe
TL;DR: In this article, the authors present a method for testing the performance of a heat pipe and an apparatus for conducting the performance test, which includes a heating device and a cooling device, respectively.
Patent
Laser output measuring apparatus
TL;DR: In this article, the second retainer 28 is provided with a temperature sensor and a temperature control circuit accepts an output signal from the temperature sensor 52 and provides control of an output message from the transistor 50 so as to allow the temperature of the retainer to conform to a set temperature.
Patent
Non-invasive energy meter for fixed and variable flow systems
TL;DR: In this article, an energy metering method and apparatus for liquid flow systems comprising first and second segments of one or more conduits through which a liquid flows was proposed, which operates with both variable and fixed flow systems, and is especially useful for both active and passive solar energy systems.
References
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Patent
Method and apparatus for the direct measurement of thermal energy transferred by a fluid medium
TL;DR: In this paper, the difference between voltages from outflow and return flow temperature sensors is integrated during a first timing period and then discharged during a second timing period with a constant current to operate a gate passing a number of pulses proportional to the voltage difference.
Patent
Method and apparatus for measuring high energy laser beam power
TL;DR: In this paper, a hollow spherical casing is provided with an inlet opening for admitting the full intensity of the laser beam, and a primary substrate formed of a bank of small tubes is mounted in the sphere to intercept the beam.
Patent
Method for determining the heat consumption of heaters and device for carrying out the method for the purposes of heating cost allocation
TL;DR: In this article, a method for determining the heat consumption of heaters having forward and return lines and one valve each in one of two lines and a measuring and evaluation unit for heat consumption for the purposes of heating cost allocation is presented.
Patent
Laser power and energy meter
Takemi Inoue,Ichiro Yokoshima +1 more
TL;DR: In this paper, a laser power and energy meter has a target surface provided with at least one pin hole for passing a small portion of the laser beam impinging thereon and further has a light detector positioned in the path of the light passing through the pin hole.