Research on a novel magnetic fluid micro-pressure sensor

Yao, Jian; Li, Decai

doi:10.1088/0957-0233/26/7/075101

Cited by 6 publications

(1 citation statement)

References 19 publications

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“…The development of micro sensors for pressure and force measurement is in general a topic of strong interest and has been pursued recently for a variety of applications [20], [22], [23], [24]. To move beyond currently available techniques, we developed a new inexpensive disposable instrumented Foley catheter with a continuous array of flexible capacitive pressure sensors on it.…”

Section: Introductionmentioning

confidence: 99%

Instrumented urethral catheter and itsex vivovalidation in a sheep urethra

Ahmadi

Rajamani

Timm

et al. 2017

Meas. Sci. Technol.

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This paper designs and fabricates an instrumented catheter for instantaneous measurement of distributed urethral pressure profiles. Since the catheter enables a new type of urological measurement, a process for accurate ex-vivo validation of the catheter is developed. A flexible sensor strip is first fabricated with nine pressure sensors and integrated electronic pads for an associated sensor IC chip. The flexible sensor strip and associated IC chip are assembled on a 7 Fr Foley catheter. A sheep bladder and urethra are extracted and used in an ex-vivo set up for verification of the developed instrumented catheter. The bladder-urethra are suspended in a test rig and pressure cuffs placed to apply known static and dynamic pressures around the urethra. A significant challenge in the performance of the sensor system is the presence of parasitics that introduce large bias and drift errors in the capacitive sensor signals. An algorithm based on use of reference parasitic transducers is used to compensate for the parasitics. Extensive experimental results verify that the developed compensation method works effectively. Results on pressure variation profiles circumferentially around the urethra and longitudinally along the urethra are presented. The developed instrumented catheter will be useful in improved urodynamics to more accurately diagnose the source of urinary incontinence in patients.

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Section: Introductionmentioning

confidence: 99%

Instrumented urethral catheter and itsex vivovalidation in a sheep urethra

Ahmadi

Rajamani

Timm

et al. 2017

Meas. Sci. Technol.

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Research and design of a novel, low-cost and flexible tactile sensor array

Huang

Jiang

et al. 2016

Measurement

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Research on the sensing properties and vibration reduction performance of self-sensing self-tuning magnetic fluid damper

Zhang,

Yang

2024

Meas. Sci. Technol.

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The semi-active control damping system has gained popularity due to its quick response time and versatility. However, external sensors are susceptible to environmental interference, affecting system reliability and increasing complexity and maintenance costs, restricting their use. To address this, a self-sensing self-tuning magnetic fluid damper is proposed. The vibration-measuring induction coil is wound on the damper to sense the magnetic fluid vibration information in real time, and the vibration signal is communicated to the self-tuning control circuit. The control circuit calculates and determines the dominant frequency of structural vibration, then outputs the relevant current signal to set the damper's natural frequency to track the excitation frequency, resulting in self-tuning vibration reduction. First, the self-sensing unit's output induced electromotive force model is created, followed by an expression of the damper's natural frequency, indicating that the self-sensing unit can achieve self-tuning vibration reduction by tracking the excitation frequency. The multi-field coupling simulation model of the magnetic fluid damper is generated, and the induction coil coupling mode and damper excitation angle are defined to obtain the maximum induced voltage.Finally, an experimental platform was developed to assess the damper's self-sensing and self-tuning vibration reduction performance. The experimental results demonstrate that the suggested self-tuning magnetic fluid damper exhibits excellent self-sensing capabilities and effectively reduces vibrations. This offers an innovative research concept for using magnetic fluid in self-sensing technology and vibration reduction domains.

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Research on a novel magnetic fluid micro-pressure sensor

Cited by 6 publications

References 19 publications

Instrumented urethral catheter and itsex vivovalidation in a sheep urethra

Instrumented urethral catheter and itsex vivovalidation in a sheep urethra

Research and design of a novel, low-cost and flexible tactile sensor array

Research on the sensing properties and vibration reduction performance of self-sensing self-tuning magnetic fluid damper

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