A Flow Measurement Technique Using a Noncontact Capacitance-Type Orifice Transducer for a Conducting Liquid

Bera, Santu; Mandal, Haraprasad

doi:10.1109/tim.2012.2192345

Cited by 37 publications

(19 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The direct method is to measure the flow rate through a pipeline by using conventional flow rate meters. 7 The indirect method is to estimate the flow rate by employing speed/position transducers or some other particular techniques. 8,9 The intervention of speed/position transducers and peripheral hardware to acquire the flow rate information would be necessitated when the latter method is adopted.…”

Section: Introductionmentioning

confidence: 99%

Research on a novel flow rate inferential measurement method and its application in hydraulic elevators

Dong

Zhang

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

Measuring and controlling the flow rate is a widely concerned problem in engineering fields. The direct flow rate measurement employing conventional flow meters and the indirect flow rate measurement using speed/position transducers or other particular techniques would result in inevitable pressure drop in hydraulic circuits, more energy consumption for pumping fluid, and higher cost of hydraulic systems. This paper presents a novel flow rate inferential measurement method and its application in hydraulic elevators. Mathematical modeling of the proposed method is deduced. The key component of the hydraulic elevator circuit, a two-stage proportional flow rate valve, is verified by experiments as one of the contributions of this paper. Based on the mathematical modeling and the valve validation test, the feasibility and validity of the proposed method are verified by the experiments performed on a test rig which is designed to imitate work situations of a hydraulic elevator. Moreover, sensitivity analyses of the proposed flow rate inferential measurement method are carried out to find the ways how to improve the accuracy of the proposed method. It is believed that this method can be applied in various engineering devices.

show abstract

Section: Introductionmentioning

confidence: 99%

Research on a novel flow rate inferential measurement method and its application in hydraulic elevators

Dong

Zhang

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…The effect of the offset voltage V OS of the opamp OA can be seen in v oi during T 1 , as C I will acquire an extra charge of ∓N 1 T C V OS /R I due to V OS in addition to 1 T Q given by (2).…”

Section: F Other Sources Of Error In the Main Cdcmentioning

confidence: 99%

“…APACITIVE sensors are widely accepted in the industry for many applications such as flow measurement [1], [2], level measurement [3], proximity detection [4], [5], measurement of humidity [6], [7], detection of ice layer [8], angular position sensing [9], etc. An interdigitated capacitive sensor has been developed for detecting some of the chemicals related to food poisoning and presented in [10].…”

Section: Introductionmentioning

confidence: 99%

An Improved Capacitance-to-Digital Converter for Leaky Capacitive Sensors

Vooka

George

2015

IEEE Sensors J.

View full text Add to dashboard Cite

This paper presents a capacitance-to-digital converter (CDC) that employs a novel approach to perform accurate measurement of capacitance of a leaky capacitive sensor. This CDC employs a sinusoidal source for excitation, which is advantageous for various sensing applications including ice detection, liquid level measurement, humidity measurement, proximity sensing, etc. Recently, an Impedance-to-digital converter (IDC) based on the dual-slope conversion technique has been reported. It can measure the value of capacitance even when a parallel resistance is present, but requires a large number of sinusoidal excitation cycles to complete a conversion, leading to poor update rate. The CDC proposed in this paper gives much higher (about 125 times) update rate compared to the IDC as it requires only a few excitation cycles for the conversion, but still gives an accurate output due to the use of a specially designed clock which helps to count the number of charge packets received by the integrator capacitor during the de-integration. Other than the operation of the CDC, the paper also describes outcome of a thorough analysis conducted to quantify the effect of various circuit parameters on the output of the new CDC. A prototype of the improved CDC has been developed and its performance parameters such as accuracy (± 0.27%), conversion time (24 ms), effect of parallel resistance, etc. have been tested and the results are reported in the paper.

show abstract

“…Various works on the development and application of new and modified techniques of flow measurement are still being reported. Bera and Mandal [7] have designed a noncontact capacitance-type orifice for the measurement of flow rate of a conducting liquid through a pipeline. Beaulieu et al [8] have developed a flow meter for measurement of unsteady liquid flow using venturi tube and modified version of the unsteady Bernoulli equation.…”

Section: Introductionmentioning

confidence: 99%

Design of a Flow Transmitter Using an Improved Inductance Bridge Network and Rotameter as Sensor

Mandal

Kumar

Sarkar³

et al. 2014

IEEE Trans. Instrum. Meas.

Self Cite

View full text Add to dashboard Cite

A rotameter is a variable area type flow sensor. It is generally used as a local indicator and display unit. Hence, a special technique is needed to transmit and to display the reading of a rotameter at a remote distance. In this paper, an improved inductance bridge-type technique has been developed to convert the float movement of the rotameter into an electrical current signal, which can be transmitted to a remote indicator. A straight ferromagnetic wire attached to the float of the rotameter acts as a sensing element of the proposed rotameter transducer. The movement of the wire as a result of fluid flow variations inside an inductive pickup coil changes the self-inductance of the coil with the changes in flow rate. An improved inductance bridge network has been used to measure the self-inductance of the coil. It has been observed that the variation of the self-inductance of the pickup coil as well as the variation of the transducer and transmitter outputs with flow rate has a very good linearity and repeatability. The necessary theoretical equations, along with the experimental results, are reported in this paper.

show abstract

A Flow Measurement Technique Using a Noncontact Capacitance-Type Orifice Transducer for a Conducting Liquid

Cited by 37 publications

References 15 publications

Research on a novel flow rate inferential measurement method and its application in hydraulic elevators

Research on a novel flow rate inferential measurement method and its application in hydraulic elevators

An Improved Capacitance-to-Digital Converter for Leaky Capacitive Sensors

Design of a Flow Transmitter Using an Improved Inductance Bridge Network and Rotameter as Sensor

Contact Info

Product

Resources

About