the digital detection module is a non-contact device for taking wrist temperatures. It has a simple and elegant appearance and features a wide range, high precision, low error, and long temperature measurement distance. It can connect to a face recognition access control terminal through the RS485 interface. the module supports temperature measurement and personnel information binding. It is capable of rapidly identifying personnel information, taking the temperature, and generating an alarm for people with abnormal temperature. In addition, it allows setting a temperature threshold so as to strictly control the access permissions of personnel (a person is not allowed to pass when the person's temperature exceeds the threshold). the module is applicable to application scenes requiring strict temperature measurement such as access control and attendance check.