Inductive Proximity Switch Build Help

In summary, the conversation was about building an inductive proximity detector for Rail Wheel detection. The speaker mentioned using an oscillator connected to a coil and counting pulses to measure detection. They also mentioned the use of NAMUR inductive switches in similar industries and provided a link for more information. They were seeking help from someone familiar with resonators to provide input on where to start. The responder stated that the speaker had already answered their own question regarding the principle of operation and design.
  • #1
andrewvanh
1
0
I am trying to put together an inductive proximity detector for Rail Wheel detection. Currently we use an oscillator connected to a coil. We then count pulses on the oscillator and measure a detect when coil saturation changes the pulse.

There are similar industries that use NAMUR inductive switches.

The only information I have found on these is at http://www.tektron.ie/namur1.htm. I would like to build a sensor similar to this and see about how it functions. Anyone familiar with resonators more so than I that can provide some input into where to start?

Thanks
Andrew
 
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  • #2
It seems that you answered your own question. Both as to the principle of operation, and a description of a refined design.

What more do you want from us?
 

FAQ: Inductive Proximity Switch Build Help

1. What is an inductive proximity switch?

An inductive proximity switch is a type of sensor that uses an electromagnetic field to detect the presence of metallic objects without physical contact. It is commonly used in industrial and automation applications for object detection, position sensing, and counting.

2. What components are needed to build an inductive proximity switch?

To build an inductive proximity switch, you will need an inductive sensor, a power source, a control circuit, and an output device (such as a buzzer or LED). You may also need additional components like resistors, capacitors, and transistors depending on the specific design.

3. How does an inductive proximity switch work?

An inductive proximity switch works by emitting an electromagnetic field from its coil. When a metallic object comes close to the sensor, it disrupts the field, causing a change in the sensor's output signal. The control circuit then interprets this signal and triggers the output device.

4. What are the key factors to consider when building an inductive proximity switch?

Some important factors to consider when building an inductive proximity switch include the type of inductive sensor (shielded or unshielded), the operating voltage and current, the detection range, and the type of output (analog or digital). It is also crucial to ensure proper wiring and shielding to avoid interference and false readings.

5. Are there any safety precautions to keep in mind when building an inductive proximity switch?

Yes, there are a few safety precautions to keep in mind when building an inductive proximity switch. Always make sure to work with low voltage and current to avoid electrical shock. Be careful when handling the inductive sensor as it may generate heat during operation. It is also essential to follow the manufacturer's instructions and use appropriate protective gear when necessary.

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