188 results about "Thermal aware" patented technology

A device and method is provided for automatically controlling the heating element(s) of an electric hot water heater to minimize electric energy consumption over a prolonged time period by projecting the future need for hot water based on it's use in prior time periods as well as by monitoring the use of hot water during current periods. The device saves energy by switching the heater "off" during times when the projected and current need for hot water is low or nonexistent thereby reducing the tank temperature and therefore energy losses to the ambient, while detecting the instantaneous requirement for hot water through utilization of a flow sensor arrangement, one of which is the utilization of thermistors on the exit pipe and on the tank or body of the heater. The device leaves all existing controls intact and may be adapted by end users to existing heaters or by manufacturers of original equipment (OEMs).

The present invention relates to a thermal printer. The thermal printer comprises a stepping motor, a thermal element, a roller driven by the stepping motor to drive thermo-sensitive papers to paper skip and a control module. The control module comprises: a PWM timing controller configured to generate PWM signals to control the rotation of the stepping motor; a serial bus controller configured to control the serial bus to transmit the printing data to the thermal element through the serial bus; a first timing controller configured to generate interruption to start the serial bus to transmit the printing data; and a second timing controller configured to control the heating time of the thermal element. The present invention further relates to a thermal printing method. A PWM timing controller, a first timing controller and a second timing controller are configured to control the printing process, and a thermal printing mode with adjustable printing speed and printing concentration is realized through comparing the counter values of the first timing controller and the second timing controller with the relation of the printing speed and the printing concentration.

A model of a thermal print head is provided that models the thermal response of thermal print head elements to the provision of energy to the print head elements over time. The amount of energy to provide to each of the print head elements during a print head cycle to produce a spot having the desired density is calculated based on: (1) the desired density to be produced by the print head element during the print head cycle, (2) the predicted temperature of the print head element at the beginning of the print head cycle, (3) the ambient printer temperature at the beginning of the print head cycle, and (4) the ambient relative humidity.

The invention relates to a cascade long-period pohotonic crystal fiber grating temperature sensor. A photonic crystal fiber is provided with a cladding consisting of periodically arrayed air holes; the cladding and a fiber core of the fiber are made of SiO2; a long-period grating with a certain period is written onto the fiber; the air holes of the cladding are filled with thermosensitive substances sensitive to temperature; the refractive indexes of the thermosensitive substances are less than the refractive index of the fiber core; and the total internal reflection photonic crystal fiber is formed. The effective refractive index of a coupled mode of the grating can be changed by controlling the temperatures of the thermosensitive substances, so that the resonant wavelength of a transmission spectrum of the grating is changed, the temperature variation is shown as spectral shift, and the wavelength-tunable temperature sensor is realized. As the bandwidth of the transmission spectrum of the single long-period grating is greater, the temperature sensitivity and the measurement precision of the transmission spectrum of the long-period grating are limited, and the sensor is transformed into a cascade long-period grating structure. The sensor achieves the tunable wavelength, the sensitivity is improved, and the sensor has a very large application prospect in the transduction field.

Two vertically offset thermistors for sensing a fluid such as oil and refrigerant in a compressor shell are monitored by a method that takes into account rapidly changing conditions within the shell. The system can determine the fluid's sump temperature, high/low liquid levels, and can determine whether the thermistors are sensing the fluid as a liquid, gas, or a mixture of the two, such as a foam or mist of liquid and gas. For greater accuracy, thermistor readings can be dithered and filtered to provide temperature or voltage values having more significant digits than the readings originally processed through a limited-bit A/D converter. For faster response, limited microprocessor time is conserved by sampling thermistor readings at strategic periods that enable the microprocessor to identify certain conditions and temperatures via simple delta-temperature ratios and undemanding equations rather than resorting to exponential functions or lookup tables to determine time constants.

Apparatus for detecting an overheating condition at an electrical power device and automatically breaking the circuit when the temperature exceeds a setpoint value. In various configurations the device is a receptacle adapted to be used in a wall mounted box or a receptacle unit that is plugged into an existing receptacle. A temperature sensor is wired parallel to a normally open test switch on a ground fault circuit interrupter or other circuit interrupting device. The temperature switch is responsive to the temperature local to the receptacle, such as is caused by poor connections to or in the receptacle or a near-overload condition. The temperature setpoint is less than the melting temperature of the insulation of the electrical wiring. The temperature sensor is a thermistor with a negative temperature coefficient that allows current to flow thereby latching the interrupting device in a tripped position until the device is reset for reuse.

Thermal-aware source code compilation including: receiving, by a compiler, an identification of a target computing system, the identification of the target computing system specifying temperature sensors that measure temperature of a memory module; compiling the source code into an executable application including inserting in the executable application computer program instructions for thermal-aware execution, the computer program instructions, when executed on the target computing system, carry out the steps of: retrieving temperature measurements of one or more of the target computing system's temperature sensors; determining, in real-time in dependence upon the temperature measurements, whether a memory module is overheated; if a memory module is overheated, entering a thermal-aware execution state including, for each memory allocation in the executable application, allocating memory on a different memory module than the overheated memory module; and upon the temperature sensors indicating the memory module is no longer overheated, exiting the thermal-aware execution state.

Apparatus and methods are disclosed to measure airflow within a chassis-cooling pathway of an appliance. The rate of airflow is determined based on the differential heating among a pair of sensor devices, such as thermistors, transistors, diodes or resistive thermal devices operating at distinctly different power levels. The appliance utilizes the calculated airflow rate to perform safety-related tasks, such as de-energizing heating elements when low or no airflow is detected.

There is disclosed a data processing method for correcting heating data for a thermal head of a thermal printer, to eliminate influence of heat energy accumulated in first to Nth heat accumulating layers of the thermal head. Basic heating data of a subject line is corrected with first to Nth correction data obtained by multiplying first to Nth heat accumulation data by predetermined coefficients respectively. The heating elements are driven in accordance with the corrected heating data, to print the subject line. A drive voltage to be applied across heating elements of the thermal head is determined at the start of printing a frame of image, according to an environmental temperature around the thermal head and a head temperature measured through a thermistor mounted in the Nth heat accumulating layer of the thermal head. The Nth coefficient is calculated according to a formula that includes the head drive voltage as a parameter.

A thermal printer detects an environmental temperature, and directly or indirectly detects a change in tension of an ink ribbon R. A correction value is read or calculated according to at least one of the detected environmental temperature and the detected change in the tension of the ink ribbon R. Thermal energy of each heating element in the thermal head is controlled based on the correction value so as to adjustably increase or reduce number of print lines on a print medium in a sub-scanning direction.

The present invention relates to chromogenic material that may respond and shift in color due to environmental conditions such as heat, light or humidity. The light may include both visible and non-visible light, such as ultraviolet light. The chromogenic material may therefore provide a method to independently develop a latent image on a given substrate, and in particular, to a substrate that includes conventional thermosensitive image forming media.

The embodiment of the invention provides a segmented printing method and device for a printer and a thermal printer. The method comprises the following steps: acquiring the total printing point numberneeded by current printing; judging whether the total printing point number is greater than a primary maximum printing point number of a current thermal printing head or not; if so, determining the printing segment number of current printing according to the total printing point number and the primary maximum printing point number of the current thermal printing head and determining the positionsof points needed to be printed in each printing segment number, wherein the positions of points needed to be printed in each printing segment number are discontinuous; and controlling corresponding heating module on the thermal printing head to print segmentally according to the positions of points needed to be printed in each printing segment number so as to achieve printing of a current printedline after printing all printing segment numbers. Based on the invention, the problem that the writing printed by the printer is unclear as a result of overheating can be solved, and the printing efficiency and practicality of the printer are improved.

New mode for controlling temperature and new structure of thermostated trough are adopted in the invention. For control temp, IC chip ADN8830 in PWM mode outputs square wave in certain duty ratio to switch drive circuit. The duty ratio is controlled by PID compensation circuit to control heating power of resistive heater to reach target for controlling temp. Thermostated trough includes trough body, and trough cover. Resistance wire is enwound on thermostated trough. Resonator Y1 is put in cavity inside trough body. Thermistor RT is in trough at side of the trough body. Cover seals oscillating circuit board on trough body. Advantages of the invention are small size and high frequency stability.

A method for maintaining a peel location and for peeling a layer of media from a surface in a thermal printer. An optical probe, that includes a light source and a photodetector, transmits light from the optical probe toward a first web. The web reflects a portion of the transmitted light onto the photodetector, which then outputs an electrical signal which is compared with a preselected signal level and the difference between them provides an indication as to how much adjustment the peel location requires. Adjusting the peel location may comprise changing environmental characteristics of the first web or the second web (surface) or adjusting a tension of the first or second web. The difference between the measured electrical signal levels is related to a physical distance of the first web from the desired peel location.

Systems, software, devices, and methods of distributing a workload among available data storage devices in a thermal aware manner are described herein. More specifically, the examples herein discuss distributing the workload among the available data storage devices in a thermal aware manner that optimizes collective IOPs of the data storage devices in an enclosure. The thermal aware distribution of the storage operations is determined by a thermal model that predicts thermal characteristics of the data storage system based on inlet air characteristics of the enclosure, performance characteristics and thermal constraints of the data storage devices, and constraints of the workload.