Hi in our country the number of people wearing helmets while driving motorcycle is less than 5% so i want to create an application which incentives people for wearing helmet regularly . In order for me to track whether the person is wearing helmet while driving requires a sensor which gives exact data . This is my requirement

Finally you give us enough information to understand your real requirements! From your comments, you have shown that you do not have the knowledge or experience to develop this device. If you wish to succeed, you need to contact a professional engineering company to develop it for you. As I mentioned, we will try to help if you run into problems but we are not a free engineering design team. See post #5

 

Hi in our country the number of people wearing helmets while driving motorcycle is less than 5% so i want to create an application which incentives people for wearing helmet regularly . In order for me to track whether the person is wearing helmet while driving requires a sensor which gives exact data . This is my requirement

Finally you give us enough information to understand your real requirements! From your comments, you have shown that you do not have the knowledge or experience to develop this device. If you wish to succeed, you need to contact a professional engineering company to develop it for you. As I mentioned, we will try to help if you run into problems but we are not a free engineering design team. See post #5

Thank you !! Will surely contact a company for that.

 

I do understand that this is a electronic forum , I want some information regarding an electronic item so i have posted my query in this forum . And yes regarding my requirement i have made my self very clear in the starting saying that i just need a sensor which can be easily installed in helmet and purpose that sensor is to just send signal to the mobile application that the helmet is put on by the concerned person

OK, I suggest a thermistor in a pulse circuit that generates a pulse about every few seconds, with a second sensor that senses the ambient temperature. If the helmet is worn then the thermistor close to the wearer's head will be warmer than the ambient. The difference in the temperatures can increase the pulse rate, which is easily detected by the application. And the whole package can be hidden inside the helmet padding. The battery power can switch on using a position sensing switch so it is only active when the helmet is in a riding position. That is about as cheap, easy, and non-intrusive as a design can be.

 

I think you misunderstood my requirement, I just need the sensor to give a signal to the mobile application all the tracking will be done in the mobile application

The sensor part is easy! Just use a thermistor. The real challenge is the reliable communication link. The sensor recommendation part I give free, for the link portion, commercial rates apply. Really! Just a thermistor will be an adequate sensor. BUT the software in the application, and the link system between the termistor and the application, wherever it resides, are the big part of the project.

 

I think you misunderstood my requirement, I just need the sensor to give a signal to the mobile application all the tracking will be done in the mobile application

I think you are misunderstanding what a sensor is capable of. A sensor alone is not able to send signal to a mobile device.

This is not my cup of tea but just a brief thought on it seems you would need at least:
power source > sensor > local mcu to process the data from sensor (something simple like arduino probably is fine)> Wireless device to send data to mobile > mobile app to process data

 

The bitter truth is that we are using two different meanings for the word "Sensor"! The TS imagines it as a magical box that wirelessly communicates with another wireless device including a processor and an application written to perform a complex set of tasks, while I define "a sensor" as a single component that changes an electrical property when it receives an external physical change. So the meanings assigned to that single word are hundreds of dollars apart, at the very least.
YES, I am very picky about the meanings of words! A BIG portion of my duty at several positions was producing the documents that described in details exactly what we would deliver and exactly what the machines and systems could do, as well as what they would not do. Accuracy was often worth thousands of dollars. In this case the TS is asking for a complete sensor system package, while I am suggesting a single thermister component that would be a very small part of the system package the TS is asking for.
My definition would stand up in a legal challenge trial.