Inductive sensor

About: Inductive sensor is a research topic. Over the lifetime, 2282 publications have been published within this topic receiving 21984 citations.

Sensor for measuring electrical conductivity of a liquid

Abstract: The sensor (1) has device (5) for measuring changing signal at the entrance of an excitation coil (3). Inductive sensor (1) to measure the electrical conductivity of liquid medium (2) has an excitation coil (3) which is driven by an entrance signal and a receiving coil (4) coupled to the excitation signal (3) via the liquid medium. The receiving coil (4) delivers an output signal (Iind) which is a measure of the conductivity of the liquid medium (2).

Simulation of Novel Linear Inductive Displacement Sensor

Abstract: One of the displacement measurement methods is using inductive sensors, usable for both small and large displacement. In this paper a 3-D linear inductive displacement sensor has been introduced. The proposed sensor consists of 2 elements that can measure 5cm with accuracy of 100im in large scale measurement. The first part is a coil and the second is a movable core that moves within the coil and it operate like differential pair. For transforming the value of varying in inductance that is in the result of approaching the target to the sensor, inductance varying is transformed to the voltage varying in vet son bridge circuit and finally, the value of displacement can be obtain.

A Non-Linear Temperature Compensation Model for Improving the Measurement Accuracy of an Inductive Proximity Sensor and Its Application-Specific Integrated Circuit Implementation

Abstract: The non-linear characteristic of a non-contacting Inductive Proximity Sensor (IPS) with the temperature affects the computation accuracy when measuring the target distance in real time. The linear model based method for distance estimation shows a large deviation at a low temperature. Accordingly, this paper presents a non-linear measurement model, which computes the target distance accurately in real time within a wide temperature range from −55 °C to 125 °C. By revisiting the temperature effect on the IPS system, this paper considers the non-linear characteristic of the IPS measurement system due to the change of temperature. The proposed model adopts a non-linear polynomial algorithm rather than the simple linear Look-Up Table (LUT) method, which provides more accurate distance estimation compared to the previous work. The introduced model is fabricated in a 0.18 μm Complementary Metal Oxide Semiconductor (CMOS) process and packaged in a CQFN40. For the most commonly used sensing distance of 4 mm, the computed distance deviation of the Application-Specific Integrated Circuit (ASIC) chips falls within the range of [−0.2,0.2] mm. According to the test results of the ASIC chips, this non-linear temperature compensation model successfully achieves real-time and high-accuracy computation within a wide temperature range with low hardware resource consumption.

Fluidic pressure safety valve

Abstract: The utility model discloses a fluidic pressure safety valve which belongs to the technical field of pressure safety valves. When a fluid medium is connected to a medium inflow hole and the pressure exceeds the set maximum limit, a piston rises to a certain height to open a medium tapping hole that is originally in a blocking state so as to relieve pressure. Meanwhile, after the piston rises to be within an effective induction distance of a magnetic inductive proximity sensor, the magnetic inductive proximity sensor sends a corresponding control or alarm signal. The fluidic pressure safety valve provided by the utility model has the advantages of simple structure, better manufacturability, lower cost and reliable work.