Inductive sensor

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

Performance Evaluation of Wheel Detection Sensor Using an Inductive Proximity Sensor for The High Speed Railway

Abstract: Nowadays, the axle counter has been developed to the wide range of the track circuit blocks as well as the wheel detection device. The axle counter, as becoming an important device for the high speed railway, must be guaranteed in accordance with the safety. With considering the safety and the high speed, performance evaluation a wheel detection sensor is described in this paper. To increase the safety, digital proximity sensor instead of analog is employed in the wheel detection sensor. Therefor the wheel detection sensor can minimize noisy signals caused by the harsh railway environments. And, to meet the high speed railway requirements, the performance of the wheel detection sensor is also successfully verified using the speed simulator at the velocity 500Km/h.

A cabin door electronic system for protecting a specific person from being trapped in an ATM machine protective cabin and an achieving method thereof

Abstract: A cabin door electronic system for protecting a specific person from being trapped in an ATM machine protective cabin and an achieving method thereof are disclosed According to the system, a cabin door controller unit is connected to a human body inductive sensor the sensitivity of which is controlled by a first mode to a third mode, a voice input circuit having a microphone disposed in the cabin, and a voice output circuit having a loudspeaker disposed outside the cabin, the height from a detecting space to the ground in the cabin when the human body inductive sensor is in the first mode is smaller than that when the human body inductive sensor is in the second mode and is larger than that when the human body inductive sensor is in the third mode, and steps are disposed before the ATM machine According to the method, when an entrance button unlocking function is shielded, it is determined that a person faints and falls to the ground if no person is detected under the third mode and unlocking is performed; when a voice signal amplitude higher than a threshold is recognized, the human body inductive sensor switches to the second mode and the third mode alternatively and works, and when the alternative working is performed continuously for two cycles and a person is detected only under the third mode in the two cycles, a child is determined to be trapped and unlocking is performed; and corresponding voice help seeking information is output during unlocking to the outside of the cabin, thus facilitating rescue

Electronic system for compartment door of ATM (automatic teller machine) protective compartment and implementation method of electronic system

Abstract: The invention discloses an electronic system for a compartment door of an ATM (automatic teller machine) protective compartment and an implementation method of the electronic system. The system is characterized in that a compartment door controller unit is connected with a human body inductive sensor with the sensitivity controlled by a first mode and a second mode of the compartment door controller unit, a sound input circuit with a microphone arranged in the compartment, and a sound output circuit with a loudspeaker arranged outside the compartment, wherein in the first mode, the height of a detecting space of the human body inductive sensor away from the ground is smaller than that of the human body inductive sensor away from the ground in the second mode; a step is arranged in the front of the ATM. The method comprises the steps as follows: when unlocking of a door entering button keeps shielded, the human body inductive sensor works alternatively in the first mode and the second mode to recognize faint falling to the ground and trapping of children, wherein if time, in which people cannot be measured, reaches specified value, the people are identified to faint and fall to the ground; if the recognized time interval, in which the sound signal amplitude is larger than a threshold, reaches specified value, and within the time, no people are identified to be faint and fall to the ground and only when the human body inductive sensor works in the second mode, the human bodies are not detected, the children are identified to get trapped, and unlocking is performed.

A new electronic interface for inductive sensors

Abstract: A new electronic interface for inductive sensors is presented. The proposed circuit is basically a current-feedback operational-amplifier (CFOA)-based sinusoidal oscillator circuit. The circuit uses only one externally connected inductor and exploits to advantage the internal poles of the CFOA. Sinusoidal oscillation at frequency of 122.1 MHz was obtained using the AD844 CFOA and an inductor of inductance = 0.14 μH with peak-to-peak output voltage = 700 mV.