Abstract: A drill bit may comprise a bit body including an electronic housing, one or more electronics coupled within the electronic housing, a transducer housing coupled to the electronic housing, a first transducer seated in the transducer housing, a first pressure tube extending through the bit body and coupled to the transducer housing, and a floating ball in the first pressure tube. A method may comprise allowing a drilling fluid to move through a first entrance and into a pressure tube formed in a bit body of the drill bit, allowing the drilling fluid to exert a force on a floating ball placed within the pressure tube, allowing the floating ball to transmit the force to a fluid placed within the pressure tube on an opposing side of the floating ball from the drilling fluid, and measuring pressure of the fluid with a first transducer.

Abstract: A method and apparatus are disclosed for a mixing system with a recirculation pump and a sensor configured to measure a property of a fluid discharged from the recirculation pump, wherein the sensor may transmit the property to a control system to allow an operator to adjust the mixing system in response to changes in the measurement signal.

Abstract: The invention discloses a device, a container and a method for measuring a liquid volume in a container based on pressure sensing. The measuring device includes a compression member, a pressure sensor, a force transmission member, an air pressure sensor and a controller. The compression member is hermetically connected to the container under measurement to form a sealed space in the container, and compresses the air in the sealed space under external force; the force transmission member converts the air pressure in the sealed space into a pressure applied on the pressure sensor; and the pressure sensor measures the pressure applied from the force transmission member before and after the compression. The present invention accurately measures the liquid volume in the container, effectively eliminates the impact of the shaking of the liquid on the measurement result, and is conveniently used to detect water quality in the natural usage.

Abstract: A voltage regulator comprises a first amplifier and a biasing unit. The first amplifier has a positive input, a negative input and an output, wherein the output of the amplifier is connected to the negative input. The biasing unit generates a reference voltage by Complementary Metal-Oxide-Semiconductor transistors, wherein the positive input of the first amplifier is configured to receive the reference voltage.

Abstract: A pressure monitoring device comprises an analog-to-digital converter (ADC) to receive an analog signal and to convert the analog signal to a digital signal. The pressure monitoring device is configured to apply in a first state a first set of calibration coefficients to the digital signal, the first set of calibration coefficients being associated with a first pressure range. The pressure monitoring device is further configured to apply in a second state a second set of calibration values to the digital signal, the second set of calibration coefficients being associated with a second pressure range different than the first pressure range.

Abstract: Systems and methods for calibrating pressure gauges in one or more process chambers coupled to a transfer chamber having a transfer volume is disclosed herein. The method includes providing a first pressure in the transfer volume and in a first inner volume of a first process chamber coupled to the transfer chamber, wherein the transfer volume and the first inner volume are fluidly coupled, injecting a calibration gas into the transfer volume to raise a pressure in the transfer volume and in the first inner volume to a second pressure, measuring the second pressure using each of a reference pressure gauge coupled to the transfer chamber and a first pressure gauge coupled to the first process chamber while the transfer volume and the first inner volume are fluidly coupled, and calibrating the first pressure gauge based on a difference in the measured second pressure between the reference pressure gauge and the first pressure gauge.

Abstract: A method for testing a pressure sensor having a first node and a second node includes coupling the first node to a first input of an amplifier and coupling a reference voltage to a second input of the amplifier; applying a transfer function to an output of the amplifier to provide a first output voltage that is based on a difference in voltage between the first node and the reference voltage; coupling the reference voltage to the first input and coupling the second node to the second input; obtaining a second output voltage at the output of the amplifier; and determining, based on the first and second output voltages, whether the pressure sensor passed or failed. During normal operation, the first node is coupled to the first input and the second node to the second input, and a second transfer function is applied to the output of the amplifier.

Abstract: For calibrating a humidity sensor, the latter is used to measure the relative humidity (U1, U2) at each of two known gas pressure values (P1, P2), likewise to be measured if necessary. At the same time, other ambient conditions are kept constant. A correction value for correction of the measured values of the humidity sensor to be subtracted from the latter is then obtained from the formula: k=((P1/P2)*U2?U1)/(P1/P2?1). The humidity sensor is thus capable of calibration without measurement of the actual humidity value.

Abstract: A method and system for calibrating an analog sensor used in a digital measurement system is provided. The design comprises generating a precise pressure value set at multiple calibration points and supplying said precise pressure value set to an uncalibrated pressure sensor, detecting sensor changes for the uncalibrated pressure sensor based on each precise pressure value generated, polling an actual pressure reading associated with a sensor change for the uncalibrated pressure sensor for each calibration point, and establishing a mathematical relationship between measured value readings and actual pressure for the uncalibrated sensor. Establishing the mathematical relationship converts the uncalibrated sensor to a newly calibrated sensor. A known good sensor may be employed to enhance calibration reliability.

Abstract: The digital air pressure gauge includes an error correction lookup table database stored within a memory device within the gauge. The database includes reference air pressure values and associated measured air pressure values, where the reference air pressure values and associated measured air pressure values are determined at identical discrete time intervals as pressurized air is input into the gauge. A transducer generates an electrical signal representative of air pressure within a device such as a pneumatic tire. A microprocessor compares the electrical signal with measured air pressure values within the database and determines a closest measured air pressure value. The microprocessor then determines the associated reference air pressure value of the closest measured air pressure value. The reference air pressure value is then displayed as the accurate pressure of the pressurized air within the device. The gauge may be disposed within a tire valve cap with an RF transmitter.

Abstract: An intracardiac rotary pump (10) is provided with a pressure differential sensor (18) for supporting the pumping heart. The pressure differential sensor measures the pressure differential between aorta (AO) and left ventricle (LV). This pressure differential must correspond to certain desired values at different speed stages. If the pressure differential deviates to too large an extent, the deviation is recognized as a drift of the pressure sensor, and a correction value is determined in dependence on the drift, the subsequently measured pressure values being corrected with the aid of this correction value. In this manner it is possible to carry out a drift correction on the sensor with the pump arranged in the heart and even with the pump in operation.

Abstract: In a drift detection method for detecting drift in a pressure detection value output from a pressure detector, pressure is detected by the pressure detector at a preset detection point in a pressure-uncontrolled region in an arbitrary molding cycle. The detected pressure is set as a reference pressure. Pressure is detected by the pressure detector at the same detection point in the pressure-uncontrolled region in a subsequent molding cycle. A deviation of the detected pressure from the reference pressure is obtained. When the deviation is greater than a preset value, it is determined that a drift is present, and processing for coping with the drift is performed.

Abstract: A pressure sensor device (1) includes a sensing element (2) for sending an analog signal according to pressure. The pressure sensor device (1) outputs the analog voltage to a microcomputer (20) through an input-output terminal (8). An input-output control circuit (4) monitors the voltage value in the input-output terminal (8). When the voltage of the input-output terminal (8) is set to high by the microcomputer (20) and is dislocated from a predetermined range, the input-output control circuit (4) functionally changes the input-output terminal (8) outputting a detecting signal to a terminal for inputting an external signal from the microcomputer. After the input-output terminal (8) is changed to the terminal for inputting the external signal, a range control circuit (7) fetches an external command signal through the input-output terminal (8) and switches the output characteristics.

Abstract: A paint booth airflow control system is described for preventing paint particles and other contaminates from entering adjacent paint booth sections by equalizing air pressure differences between adjacent sections. Pressure sensors in communication with adjacent paint booth sections report pressure differences between the adjacent sections to an airflow controller. Responsive to the reported pressure differences the airflow controller adjusts paint booth airflow to equalize the pressure between adjacent sections. In order to maintain pressure measurement accuracy, automatic calibration modules periodically calibrate all pressure sensors to pneumatic references.

Abstract: A device for compensating for temperature dependent effects on an electronic sensor output signal. The device is capable of receiving a digital output signal from an electronic sensor and receiving a digital output signal from an electronic sensor and receiving a digital signal indicative of the temperature of the sensor.