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Sensor Recommendation

switch
Genius 3790 points
Other Parts Discussed in Thread: DRV425

Hi Ti Team,

We are looking for a sensor that will give an alarm near a high voltage, such an application scenario;The application platform is MTK6762, and the product is a smart wearing helmet.,For the following

High voltage near alarm with shock prevention warning function: when you wear near alarm and mistakenly into the live area (or will be into the live body, with pole) to a certain distance, near alarm can send out continuous alarm sound, remind you to pay attention to the danger of the live body.When you hear the alarm sound, you should quickly away from the high voltage live area, until the near alarm stops the alarm sound.The near alarm of this anti-electric shock warning function (also known as: near electric alarm function), can prevent due to the illusion and error caused by electric shock casualties.The low voltage of the near alarm has the function of electrical inspection: it can be used to detect whether there is electricity in the fire wire of more than 110V AC without touching the wire.Or used for cable and low voltage wire broken contact detection.Or for checking the direction of the wire in the wall of the user who stole electricity.Nearby alarm is an ideal warning auxiliary safety tool for high voltage electric power workers.

  • 0
    TI__Expert 7599 points
    Hello, thanks for your questions. I have a following question to better understand a product to recommend. Can you provide us a description on how you envision the HV detection being detected ? Do we know what is the signal and the range and how does the sensor needs to react. A drawing will help here!
  • 0 in reply to Arjun_Prakash
    Genius 3790 points

    Hello, the sensor function we need is described as follows:

    This product equipment is mainly used in power workers such as the State Grid. There are different high voltages in their working environment, such as: 10KV\35KV\110K\220KV and other high voltages. The higher the voltage, the closer the staff is to the high voltage. The riskier the electricity,
    Then, we are ready to develop a main product with near-electricity induction alarm function. When the product carried by the staff is close to the dangerous area, the alarm will be issued and the staff will be assigned. There is a high-voltage dangerous area in front, and the vicinity can be identified. What is the voltage of the high voltage?

  • 0 in reply to Arjun_Prakash
    Genius 3790 points

    Hello, the sensor function we need is described as follows:

    This product equipment is mainly used in power workers such as the State Grid. There are different high voltages in their working environment, such as: 10KV\35KV\110K\220KV and other high voltages. The higher the voltage, the closer the staff is to the high voltage. The riskier the electricity,
    Then, we are ready to develop a main product with near-electricity induction alarm function. When the product carried by the staff is close to the dangerous area, the alarm will be issued and the staff will be assigned. There is a high-voltage dangerous area in front, and the vicinity can be identified. What is the voltage of the high voltage?

  • 0 in reply to switch
    TI__Mastermind 22905 points

    switch,

    the only sensor that we can offer for an application such as this is the DRV425, but this is a magnetic field sensor, rather than an electric field sensor, and I don't necessarily know if this is the best solution here. The magnetic field is going to be examining the current rather than the voltage, and obviously the current is much smaller in magnitude in these types of applications. 

    A few things to consider.

    • You cannot distinguish between voltages with this method, it simply examines current magnitude
    • You would need 2 DRV425 to remove the common magnetic field only earth field
    • You will need to determine that no other magnetic fields coming from other sources. with this low of sensing you would need to eliminate other sources. 
      • Earth field would be the only one you could cancel out with two DRV425 unless you know where the other sources is coming from.