36 results about "Relative humidity measurement" patented technology

A dehumidifier system is connected to an interior space of a building through supply and return ducts, either directly and / or through an HVAC system. Controllable dampers can be used to select how the dehumidifier system is connected to the interior space and the HVAC system. The dehumidifier determines the dew point of the ambient air from temperature and relative humidity measurements taken at location(s) of relative humidity and temperature sensors. Based on the determined dew point, the dehumidifier system determines whether to operate. The temperature and relative humidity sensors can be located in the interior space or within the dehumidifier, where they project into the air stream flowing through the dehumidifier. The dehumidifier system operates in response in part to blower calls to the HVAC system and controls the HVAC system and a ventilation system to distribute the dehumidified air and outside air throughout the building.

The invention relates to a device for measuring early-age relative humidity of a cement-based material. In order to measure the early-age relative humidity of the cement-based material, a brand new design structure is adopted, the early-age internal high temperature of the cement-based material and damage of high humidity on a sensor probe can be effectively avoided, and an early-age relative humidity curve of the cement-based material can be accurately obtained. The invention also relates to a method for measuring the early-age relative humidity of the cement-based material. Aiming at previous data, a spot measurement method is adopted, the condition that the sensor probe is damaged by the continuous saturated relative humidity and the high temperature can be avoided, and when the humidity of the cement-based material is lower than 100 percent, the humidity is automatically collected by a computer, a high-precision humidity curve can be obtained, and the sensor can be prevented from being damaged.

The invention discloses an on-line remote monitoring method and device for the pollution status of disc insulators. The relative conductance method of the pollution status is used to display the pollution degree online, quantitatively, conveniently and clearly, to realize the mid-term forecast of the pollution of the insulator, and it can also be applied to power transmission and transformation equipment. Pollution status monitoring of all external insulation; use the distributed capacitance current and pollution leakage current of the transmission line as the energy source, avoiding the shortcomings of solar energy as the energy source; and can separately measure the capacitance current, pollution leakage current or the sum of the insulators at the low potential end, according to The change of the capacitive current determines whether the insulator string has a zero-value insulator or whether the line is charged or grounded; the present invention uses a hanger to connect the outdoor monitoring device in series at the low potential end of the insulator string, and places the temperature and relative humidity measurement points at the end of the insulator string In the air flow, it is protected by a sunshade, so that the pollution leakage current is well correlated with the temperature and relative humidity measurement data, and the implementation of the relative conductance method in the pollution state is guaranteed on the hardware.

A climate controller having a control unit operable to activate and de-activate an HVAC unit, a temperature sensor and a humidity sensor operable to communicate temperature and relative humidity measurements to the control unit, and an interface to a network through which the control unit is operable to connect to a networked server and transmitting measurements for temperature and relative humidity; the control unit operable to activate and de-activate the HVAC unit according to the control unit operable to measure a temperature and humidity level, operable to obtain a value for a temperature setting and mode of operation for the HVAC unit, and operable to communicate a signal to the HVAC unit to effect the activation or de-activation. Climate control is achieved with reference to a comfort level temperature, and energy efficiency is achieved through the application of machine learning methods operated on data sets gathered by the climate controller.

The embodiment of the invention provides an absolute-humidity detection device and method for a cooking utensil and the cooking utensil, and belongs to the field of home appliances. The device comprises a circuit board, a relative-humidity measuring device, a temperature measuring device and a controller, wherein the circuit board is installed to the side wall of an air discharging chamber of thecooking utensil, and a bottom layer of the circuit board faces the side wall; the relative-humidity measuring device comprises a humidity sensor and a capacitance detection module, and the capacitancedetection module is used for detecting the capacitance of the humidity sensor and outputting capacitance detection signals; the temperature measuring device is arranged on a bottom layer of the circuit board and used for detecting the temperature of steam at the air discharging chamber and outputting temperature detection signals; the controller is used for determining the relative humidity of steam at the air discharging chamber according to the capacitance detection signals, determining the temperature of the steam at the air discharging chamber according to the temperature detection signals and determining the absolute humidity of the steam at the air discharging chamber according to the relative humidity and the temperature. By means of the absolute-humidity detection device and method for the cooking utensil and the cooking utensil, the absolute humidity can be simply and accurately determined.

The present invention relates to systems and methods for humidity determination and uses thereof. Methods and systems are provided for relative humidity measurement using ultrasonic sensors. In one example, a plurality of ultrasonic signals having different frequencies are transmitted from a single sensor, and the attenuation values ​​of the reflected signals are determined for only those signals determined to have the same transit time from transmission to reception, and wherein the The frequency of the plurality of ultrasound signals is altered as an indication that the signal may be below a signal-to-noise ratio threshold. In this way, relative humidity can be accurately determined by determining the difference between the attenuation values ​​between pairs of signals, wherein the signals comprise different frequencies and wherein the signals comprise the same transit time.

A method for measuring and controlling dew point temperature of integrated air-conditioning includes obtaining dew point temperature measurement value corresponding to temperature and relative humidity measurement value of control object point as well as dew point temperature setting value corresponding to temperature and relative humidity setting value, comparing obtained dew point temperature measurement value with obtained setting value, using proportional integration and differential algorithm to control aperture of valve in separating range for making said measurement value be gradually tended to said setting value.