Patent ID: 6269829
Filing Date: 2001-08-07
Classification: G01F,Y10T

Abstract:
An adapter to convert a traditional gas meter into a computerized gas meter, comprising:a casing to be affixed to said traditional gas meter to replace a cover of said traditional gas meter;a microcomputer gas flow rate signal converting module, comprising a diaphragm to be positioned adjacent to entrance of gas of said traditional gas meter and a magnet affixed to diaphragm, a reed switch positioned at a relative position inside said casing to sense movement of said magnet and a converter circuit connected to said reed switch to convert signals generated by said reed switch into gas flow rate signals;a gas flow monitoring module comprising a flow rate comparison device to generate a warning signal when said gas flow rate is greater than a predetermined value;a gas pressure monitoring module comprising a pressure meter to measure gas pressure at gas flow measurement chamber of said traditional gas meter and a gas pressure monitoring circuit to generate a warning signal when said gas pressure is lower than a predetermined value;an earthquake sensing module to sense an earthquake according to vertical vibration waves and horizontal vibration waves of said earthquake and to generate a warning signal when an earthquake is sensed; anda gas supply shutoff mechanism comprising a braking device to stop movements of said gas flow sensing and said diaphragm in order to stop gas supply and a control device to control said braking device to shutoff said gas supply when a warning signal is generated by said gas flow monitoring module, said gas pressure monitoring module or said earthquake sensing module;wherein said microcomputer gas flow rate signal converting module, said gas flow monitoring module, said gas pressure monitoring module, said earthquake sensing module and said gas supply shutoff mechanism are enclosed in said casing.