Microwave Detection Device and Its Detection Method and Application

Abstract

A microwave detection device, which is arranged for detecting movement characteristics of at least one object within a detection area, includes a microwave detecting module generating a difference signal based on a Doppler effect principle and a signal converting module operatively connected to the microwave detecting module. The signal converting module is arranged to convert the differential signal into a wave signal in order to analyze the wave signal for acquiring the movement characteristics of the object within the detection area.

What is claimed is: 
     
         1 . A microwave detection device for detecting one or more movement characteristics of at least one object in a detection area thereof, comprising:
 a microwave detecting module generating a differential signal; and   a signal converting module, operatively connected to said microwave detecting module, converting said difference signal into a wave signal, wherein a specific frequency range of said wave signal is selected and limited to be analyzed for determining the one or more movement characteristics of the at least one object in the detection area.   
     
     
         2 . The microwave detection device, as recited in  claim 1 , wherein said microwave detecting module is arranged to emit a detection wave in the detecting area, wherein a reflected wave is formed when the detection wave is reflected by the at least one object in the detecting area, wherein said differential signal is outputted by said microwave detecting module in response to at least one of a frequency difference between said detection wave and said reflected wave and a phase difference between said detection wave and said reflected wave. 
     
     
         3 . The microwave detection device, as recited in  claim 1 , wherein said signal converting module is arranged to convert said differential signal into said wave signal in response to at least a property change thereof for determining the one or more movement characteristics of the at least one object in the detection area, wherein said property change of said wave signal is at least one of an amplitude change of said wave signal, a phase change of said wave signal, a change in a pulse width of said wave signal, and a frequency change of said wave signal. 
     
     
         4 . The microwave detection device, as recited in  claim 1 , wherein said signal converting module is at least one of an analog filter and a digital filter. 
     
     
         5 . The microwave detection device, as recited in  claim 1 , further comprising at least one signal amplifying module operatively connected to at least one of said microwave detecting module and said signal converting module, wherein said differential signal is amplified by said signal amplifying module and is then converted into said wave signal by said signal converting module. 
     
     
         6 . The microwave detection device, as recited in  claim 5 , wherein at least one of said signal amplifying module amplifies said differential signal and at least one of said signal amplifying module amplifies said wave signal. 
     
     
         7 . The microwave detection device, as recited in  claim 1 , further comprising a central processing module operatively connected to said signal converting module, wherein said central processing module processes and analyzes said wave signal for determining the one or more movement characteristics of the at least one object in the detection area through said wave signal in response to at least one of a wave frequency of said wave signal, a wave amplitude of said wave signal, different phase differences of said wave signal, a time duration of said wave signal, and an amplitude change of said wave signal in one cycle. 
     
     
         8 . The microwave detection device, as recited in  claim 7 , wherein said central processing module comprises a signal sampling unit, a data processing unit and an output unit operatively connected with each other, wherein said signal sampling unit, said data processing unit and said output unit are integrated to form a single unit. 
     
     
         9 . The microwave detection device, as recited in  claim 1 , wherein said specific frequency range is set as 25 Hz or less to set said wave signal in an “electromagnetic wave free” segment. 
     
     
         10 . The microwave detection device, as recited in  claim 1 , wherein said specific frequency range is set as 1 Hz or less for detecting a respiratory movement of a human body. 
     
     
         11 . The microwave detection device, as recited in  claim 1 , wherein said specific frequency range is set between 1-3 Hz for detecting a heartbeat movement of a human body. 
     
     
         12 . A smart device, comprising:
 at least one microwave detection device having a detection area for detecting one or more movement characteristics of at least one object therewithin, wherein said microwave detection device comprises a microwave detecting module generating a differential signal and a signal converting module operatively connected to said microwave detecting module, wherein said signal converting module converts said difference signal into a wave signal, wherein a predetermined frequency range of said wave signal is selected and limited to be analyzed for determining the one or more movement characteristics of the at least one object in the detection area;   an execution circuit module operatively connected to said microwave detection device; and   a device body being controlled by said execution circuit module and operated in response to the one or more movement characteristics of the at least one object in the detection area obtained by said microwave detection device.   
     
     
         13 . The smart device, as recited in  claim 12 , wherein said device body is selected from the group consisting of a light fixture, an audio system, an air conditioner, and an automatic curtain. 
     
     
         14 . A detection method for detecting one or more movement characteristics of at least one object within a detection area of a microwave detection device, comprising the steps of:
 (a) converting a differential signal to a wave signal via a signal converting module; and   (b) processing said wave signal to acquire the one or more movement characteristic of the at least one object in the detection area, wherein a specific frequency range of said wave signal is selected and limited to be analyzed for determining the one or more movement characteristics of the at least one object in the detection area.   
     
     
         15 . The detection method, as recited in  claim 14 , before the step (a), further comprising the steps of:
 via a microwave detecting module, emitting a detection wave to said detection area and receiving a reflected wave corresponding to said detection wave; and   outputting said differential signal via said microwave detecting module in response to at least one of a frequency difference between said detection wave and said reflected wave and a phase difference between said detection wave and said reflected wave.   
     
     
         16 . The detection method, as recited in  claim 14 , wherein the step (a) further comprises a step of converting said differential signal into said wave signal in response to a property change of said signal converting module for determining the one or more movement characteristics of the at least one object in the detection area, wherein said property change of said wave signal is at least one of an amplitude change of said wave signal, a phase change of said wave signal, a change in a pulse width of said wave signal, and a frequency change of said wave signal. 
     
     
         17 . The detection method, as recited in  claim 14 , wherein the step (a) further comprises a step of converting said differential signal to said wave signal selectively by using an envelope filtering method based on pulse amplitude or by means of a pulse width based integration method. 
     
     
         18 . The detection method, as recited in  claim 14 , before the step (a), further comprising a step of amplifying said differential signal. 
     
     
         19 . The detection method, as recited in  claim 18 , after the step (a), further comprising a step of amplifying said wave signal. 
     
     
         20 . The detection method, as recited in  claim 14 , wherein the step (b) further comprises a step of determining the different movement characteristics of the at least one object in the detection area in response to one of a wave frequency, of said wave signal, a wave amplitude of said wave signal, a time duration of said wave signal, and an amplitude change of said wave signal in one cycle. 
     
     
         21 . The detection method, as recited in  claim 14 , wherein said specific frequency range is set as 25 Hz or less to set said wave signal in an “electromagnetic wave free” segment. 
     
     
         22 . The detection method, as recited in  claim 14 , wherein said specific frequency range is set as 1 Hz or less for detecting a respiratory movement of a human body. 
     
     
         23 . The detection method, as recited in  claim 14 , wherein said specific frequency range is set between 1-3 Hz for detecting a heartbeat movement of a human body.