Research on Metrological Characteristic of Micro-Differential Pressure Sensor in Draw Resistance Device

Micro-differential pressure sensor is one of the core components in the draw resistance device. Its metrological characteristic directly affects the accuracy of cigarettes’ draw resistance. Because different principles of micro-differential pressure sensors are used by each equipment manufacturer, the influences are not consistent on measuring the draw resistance. In order to study the influences of micro-differential pressure sensor on the draw resistance measurement, we will analyze its metrological characteristic through the acquisition of the output voltages under the different standard pressures. The experimental results show that the precision level of micro-differential pressure sensor using is higher, and it has little effect on the draw resistance measurement.

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Single-chip solution for electronics unit of a smart pressure sensor

Sensor Review ◽

10.1108/sr-10-2019-0253 ◽

2020 ◽

Vol 40 (5) ◽

pp. 529-534

Author(s):

Igor S. Nadezhdin ◽

Aleksey G. Goryunov

Keyword(s):

Pressure Sensor ◽

Sensitive Element ◽

Noise Immunity ◽

Pressure Sensors ◽

Cost Effective ◽

Differential Pressure ◽

Manufacturing Cost ◽

Content Type ◽

Differential Pressure Sensor ◽

Developed Pressure

Purpose Differential pressure is an important technological parameter, one urgent task of which is control and measurement. To date, the lion’s share of research in this area has focused on the development and improvement of differential pressure sensors. The purpose of this paper is to develop a smart differential pressure sensor with improved operational and metrological characteristics. Design/methodology/approach The operating principle of the developed pressure sensor is based on the capacitive measurement principle. The measuring unit of the developed pressure sensor is based on a differential capacitive sensitive element. Programmable system-on-chip (PSoC) technology has been used to develop the electronics unit. Findings The use of a differential capacitive sensitive element allows the unit to compensate for the influence of interference (for example, temperature) on the measurement result. With the use of PSoC technology, it is also possible to increase the noise immunity of the developed smart differential pressure sensor and provide an unparalleled combination of flexibility and integration of analog and digital functionality. Originality/value The use of PSoC technology in the developed smart differential pressure sensor has many indisputable advantages, as the size of the entire circuit can be minimized. As a result, the circuit has improved noise immunity. Accordingly, the procedure for debugging and changing the software of the electronics unit is simplified. These features make development and manufacturing cost effective.

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Capacitance pressure sensor with S-type electrode for improved sensitivity

Transactions of the Institute of Measurement and Control ◽

10.1177/01423312211008001 ◽

2021 ◽

pp. 014233122110080

Author(s):

Santhosh KV ◽

Swetha Rao

Keyword(s):

Pressure Sensor ◽

Pressure Sensors ◽

Differential Pressure ◽

Capacitive Pressure Sensor ◽

Input Output ◽

Capacitance Pressure ◽

Output Behavior ◽

Output Characteristics ◽

Differential Pressure Sensor ◽

Output Capacitance

This paper aims at designing a differential pressure sensor. The objective of the work is to design and fabricate the electrodes of a capacitive pressure sensor, so as to measure absolute and differential pressure accurately with improved sensitivity. In place of conventional parallel plate diaphragm, S-type electrodes are proposed in the present work. The work comprises of study of the proposed design in terms of a mathematical model, input-output behavior along with detailed analysis of pressure distribution pattern. Output capacitance obtained for changes in pressure is converted to voltage with the suitable signal conditioning circuit and data acquisition system to acquire the signal on to a PC. A neural network model is designed to compensate the nonlinearities present in the sensor output. Input-output characteristics of the designed sensor shows an improved response as compared with existing pressure sensors.

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