Digital measuring device

A digital measuring device, comprising:

• a housing;
• a valve core measuring head, which is arranged outside the housing, the valve core measuring head being adapted to carry out an operation of tightening a tire valve core;
• a tire pressure measuring head, which is arranged outside the housing, the tire pressure measuring head being adapted to connect to a tire valve stem;
• a tire tread depth measuring head, which is arranged outside the housing, the tire tread depth measuring head being adapted to carry out an operation of reaching into and contacting a tire tread;
• a valve core tightening torque measuring sensor, which is arranged inside the housing and coupled to the valve core measuring head to measure and detect a detection signal indicating an output of a tire valve core tightening torque;
• a tire pressure measuring sensor, which is arranged inside the housing and coupled to the tire pressure measuring head to measure and detect a detection signal indicating an output of a tire pressure;
• a tire tread depth measuring sensor, which is arranged inside the housing and coupled to the tire tread depth measuring head to measure and detect a detection signal indicating an output of a tire tread depth;
• at least one digital measurement circuit, which is arranged inside the housing and connected to the valve core tightening torque measuring sensor, the tire pressure measuring sensor, and the tire tread depth measuring sensor to computer, display, and issue alarms regarding the tightening torque that the valve core tightening torque measuring head applies to tighten a tire valve core, a tire pressure measured with the tire pressure measuring head, and a tire tread depth measured with the tire tread depth measuring head;
• at least one wireless communication module, which is arranged inside the housing to connect with the digital measurement circuit to transmit the tire valve core tightening torque, the tire pressure, and the tire tread depth, in a wireless manner, to at least one electronic device;
• and
• at least one power supply unit, which is arranged inside the housing to supply desired direct-current working powers to the valve core tightening torque measuring sensor, the tire pressure measuring sensor, the tire tread depth measuring sensor, and the digital measurement circuit.