opamp outputs a high signal even when the input is 0

[sherazi]

i am using this circuit , and the problem i am facing is that sometimes when the input is becomes enough to make the output high and then gets to 0 value the opamp still outputs a high value, is there any way to ensure that ouput comes to 0 after the input has gone low...

the circuit is for a vibration sensor, and the input is induced in the coil via a vibrating magnet on the spring ...

 

[sherazi]

its the output of first opamp that remains sometimes, and when the spring again vibrates then goes normal again ...

 

[(*steve*)]

A schematic may be useful.