Infrared measuring device and method for human motion modality
A technology of human body movement and measurement method, applied in the directions of diagnostic recording/measurement, electrical radiation detector, medical science, etc., it can solve the problem of inability to obtain specific parameters, and achieve the effects of low power consumption, low cost and simple algorithm
Inactive Publication Date: 2011-08-17
TSINGHUA UNIV
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Problems solved by technology
Through the analysis of the analog signal 5, it is only possible to distinguish different individuals within the detection range, and it is not yet possible to obtain specific parameters related to the human body's movement patterns such as walking speed, running, and jumping.
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[0035] Take the arm swing action of the human body as an example. Figure 4 shows the application image 3 The detection system shown is the two signals collected by the data acquisition circuit 11 when detecting the human body's in situ leg stepping (without arm swing). Pic 4-1 Shown is a signal detected by the lens 14, Figure 4-2 Shown are 2 signals detected by the lens 15 .
[0036] Figure 5 shows the application image 3 The detection system shown in the figure detects the two signals collected by the data acquisition circuit 11 when the human body is normally stepping on the spot (with arm swing). Figure 5-1 Shown is a signal detected by the lens 14, Figure 5-2 Shown are 2 signals detected by the lens 15 .
[0037] Comparing Fig. 4 and Fig. 5, the first Fresnel lens 14 is insensitive to the arm swinging action, and No. 1 outputs a stable high-quality step frequency signal; the second Fresnel lens 15 is more sensitive to the arm swinging action, Figure 5-2 The sm...
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The invention discloses an infrared measuring device and method for human motion modality, belonging to the technical field of human motion modality measurement. The infrared detector of the invention is composed of a pyroelectric element group and a Fresnel lens element covered on the pyroelectric element; the infrared ray radiated by human in the detection range is incident on the pyroelectric element through the Fresnel lens element, the pyroelectric element group generates an electric signal corresponding to human motion modality, the electric signal is amplified by an amplifying circuit to obtain an analogue voltage signal, the analogue voltage signal enters an automatic gain control circuit to be regulated to prevent the voltage signal from distorting or deforming, and then enters adata acquisition circuit to be transferred into a digital signal, the digital signal is analyzed and processed by a digital signal processing circuit to obtain a strategy signal corresponding to human motion modality.
Description
technical field [0001] The invention relates to a device and method for measuring human body movement form, in particular to a device and method for infrared measurement of human body movement form by using a pyroelectric element and a Fresnel lens assembly. Background technique [0002] When the surface of some ferroelectric materials receives infrared radiation, the surface temperature changes. As the temperature rises or falls, a charge change occurs on the surface of a substance, a phenomenon known as the pyroelectric effect. Infrared detection elements made of pyroelectric effect, called pyroelectric elements, are generally made of ceramic oxides. Together with the charge detection circuit, the pyroelectric element constitutes a pyroelectric sensor. [0003] Since the electrical signal generated by the pyroelectric element is specifically expressed as the change of surface bound charge, it can only be used to detect dynamically changing infrared radiation signals. Th...
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IPC IPC(8): A61B5/11G01J5/12
Inventor 董永贵杨靖王东生
Owner TSINGHUA UNIV