CN112985616A - Human body infrared sensing signal processing system with multiple configuration schemes - Google Patents
Human body infrared sensing signal processing system with multiple configuration schemes Download PDFInfo
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Abstract
The application provides a human body infrared sensing signal processing system with multiple configuration schemes, which comprises an infrared sensing element and a signal processing chip, wherein the output end of the infrared sensing element is connected with the input end of the signal processing chip, the infrared sensing element is configured to generate an analog electric signal according to a human body infrared signal and output the analog electric signal to the signal processing chip, the signal processing chip is configured to store multiple configuration schemes and is also configured to receive the analog electric signal from the infrared sensing element and process the analog electric signal to obtain a human body infrared sensing result, so that a user can switch among the multiple configuration schemes in the using process, the problem that the traditional human body infrared sensing signal processing system is only suitable for one technical scheme and has poor flexibility is solved, the use requirement of a user for replacing the configuration scheme can not be met.
Description
Technical Field
The invention relates to the technical field of human body infrared sensing signal processing, in particular to a human body infrared sensing signal processing system with multiple configuration schemes.
Background
Generally, the temperature of the human body is maintained at about 37 ℃, and since the human body emits infrared rays with specific wavelengths of about 10 μm, the passive infrared probe can detect the infrared rays emitted by the human body, thereby realizing real-time monitoring of the human body. Infrared rays are focused on the pyroelectric element after passing through the Fresnel lens and the optical filter, and when people pass through the coverage area of the lens, infrared energy is sequentially focused on different areas of the pyroelectric element, so that the charge release of the multiple pyroelectric elements is unbalanced, and an external measurable signal is generated. And then an alarm signal is obtained after detection processing.
In the prior art, the technical scheme of the traditional human body infrared sensing signal processing system is as follows: the pyroelectric element outputs an analog electric signal, the analog electric signal is converted to obtain a digital signal, the digital signal is subjected to down-sampling by an extraction filter, the down-sampled signal is converted into serial data through a serial interface logic and is output to an off-chip microcontroller for reading, and all detection, judgment and alarm generation are completed by the off-chip microcontroller; or the signal after down sampling directly generates an alarm signal through the detection judgment logic on the chip. However, the conventional human body infrared sensing signal processing system chip has many defects, and the processing mode of the conventional human body infrared sensing signal processing system chip is not flexible enough, and is generally only suitable for one configuration scheme. When a user needs to switch among a plurality of configuration schemes, the use requirement of the user for replacing the configuration schemes cannot be met.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an infrared sensing signal processing system with multiple configuration schemes, so as to ensure that a user can switch among the multiple configuration schemes in the using process, and solve the problems that the traditional human body infrared sensing signal processing system is only suitable for one technical scheme, has poor flexibility and cannot meet the use requirement of the user for replacing the configuration schemes.
A human body infrared sensing signal processing system with multiple configuration schemes comprises an infrared sensing element and a signal processing chip.
The output end of the infrared sensing element is connected with the input end of the signal processing chip.
The infrared sensing element is configured to acquire a human body infrared signal, generate an analog electrical signal according to the human body infrared signal, and output the analog electrical signal to the signal processing chip.
The signal processing chip is configured to store a plurality of configuration schemes and is further configured to receive the analog electric signal from the infrared sensing element, and the analog electric signal is processed according to one of the plurality of configuration schemes stored in the signal processing chip to obtain a human body infrared sensing result.
The signal processing chip includes: the device comprises a signal conversion module, a filtering extraction module, a storage module, a register control module, a motion detection module, a user control module and a serial output module.
The input end of the signal conversion module is connected with the output end of the infrared sensing element, the output end of the signal conversion module is connected with the input end of the filtering extraction module, and the signal conversion module is configured to convert the analog electric signal into a digital signal and send the digital signal to the filtering extraction module.
The filtering and extracting module is configured to filter a high-frequency signal in the digital signal to obtain a high-resolution digital signal.
The output end of the storage module is connected with the input end of the register control module, the storage module is configured to store configuration schemes, and the configuration schemes at least comprise a first configuration scheme and a second configuration scheme; the storage module is further configured to store setting parameters including sensitivity information, lighting delay time information, and operation mode information;
the sensitivity information is used for controlling the system sensitivity;
the lighting delay time information is used for controlling the detection lighting time of the system;
the working mode information is used for controlling a detection lighting mode of the system;
the storage module is also configured to store the enable switches corresponding to the signal conversion module, the filtering extraction module, the registering control module, the motion detection module, the user control module and the serial output module;
the output end of the user control module is connected with the input end of the register control module, the user control module is configured to receive an instruction from a user, send the instruction to the register control module, and change the configuration scheme, and the user control module is further configured to receive a setting parameter from the user and send the setting parameter to the register control module; the user control module is also configured to send an enable switch control instruction to the register control module;
the register control module is respectively connected with the storage module, the motion detection module, the user control module and the serial output module, and is configured to receive an instruction from the user control module, acquire a first configuration scheme or a second configuration scheme from the storage module, and configure the filtering extraction module, the motion detection module and the serial output module according to the first configuration scheme or the second configuration scheme; the register control module is further configured to configure the motion detection module according to the setting parameters from a user and store the setting parameters in the storage module; the first configuration scheme is that the output end of the filtering extraction module is connected with the input end of the motion detection module, and the motion detection module is configured to process the high-resolution digital signal to obtain a human body infrared sensing result.
The second configuration scheme is to connect the output end of the filtering and extracting module with the input end of the serial output module, and the serial output module is configured to receive the high-resolution digital signal and convert the high-resolution digital signal into serial data for output.
The registering control module is further configured to acquire the corresponding enabling switch from the storage module according to the enabling switch control instruction, and control the signal conversion module, the filtering extraction module, the registering control module, the motion detection module, the user control module and the serial output module.
The system also includes a microcontroller externally connected to the signal processing chip.
The microcontroller is configured to receive the serial data and process the serial data to obtain a human body infrared sensing result.
The register control module is also configured to acquire a second configuration scheme from the storage module when the signal processing chip is externally connected with a microcontroller, and configure the signal processing chip according to the second configuration scheme. The register control module is further configured to configure the microcontroller according to the setting parameters from a user and store the setting parameters in the storage module.
The storage module is a nonvolatile memory.
The signal processing chip further comprises a high-pass filtering module, wherein the input end of the high-pass filtering module is connected with the output end of the low-pass filtering module, and the high-pass filtering module is configured to filter direct-current components in the secondary filtered high-resolution digital signals to obtain tertiary filtered high-resolution digital signals.
The control mode of the user control module can be key control or adjustable resistance control.
The motion detection device further comprises a first universal pin and a second universal pin, wherein the first universal pin is respectively connected with the motion detection module, the user control module and the serial output module, and the second universal pin is respectively connected with the motion detection module, the user control module and the serial output module.
In a second aspect, the present application provides a human body infrared sensing signal processing method having multiple configurations, the method including:
acquiring a configuration scheme change instruction;
acquiring a corresponding configuration scheme according to the configuration scheme change instruction;
configuring according to the configuration scheme;
acquiring an analog electric signal;
and processing the analog electric signal to obtain a human body infrared sensing result. The configuration scheme changing instruction is selected by a user according to actual use requirements, at least one configuration scheme is adopted, and the configuration scheme can be various.
The configuration schemes are pre-stored in the signal processing chip and comprise a first configuration scheme and a second configuration scheme.
The first configuration scheme is that the analog electric signals are converted into digital signals and then processed to obtain a human body infrared sensing result.
The second configuration scheme is that analog electric signals are converted into digital signals, the high-resolution digital signals are converted into serial data to be output, and the serial data are processed through an external microcontroller to obtain a human body infrared sensing result.
The analog electric signal comes from the infrared sensing element, and the infrared sensing element acquires the human body infrared signal and generates the analog electric signal according to the human body infrared signal.
The method further comprises the following steps:
acquiring setting parameters stored in a system, wherein the setting parameters comprise sensitivity information, lighting delay time information and working mode information, the sensitivity information is used for controlling the sensitivity of the system, the lighting delay time information is used for controlling the lighting detection time of the system, and the working mode information is used for controlling the lighting detection mode of the system;
and setting the system according to the setting parameters.
The method further comprises the following steps:
acquiring setting parameters from a user, wherein the setting parameters comprise sensitivity information, lighting delay time information and working mode information, the sensitivity information is used for controlling the sensitivity of the system, the lighting delay time information is used for controlling the lighting detection time of the system, and the working mode information is used for controlling the lighting detection mode of the system;
setting the system according to the setting parameters;
storing the setting parameters in a system.
As can be seen from the above technical solutions, the present application provides a human body infrared sensing signal processing system having multiple configurations, which includes an infrared sensing element and a signal processing chip, wherein an output end of the infrared sensing element is connected to an input end of the signal processing chip, the infrared sensing element is configured to generate an analog electrical signal according to a human body infrared signal and output the analog electrical signal to the signal processing chip, the signal processing chip is configured to store multiple configurations, and is further configured to receive the analog electrical signal from the infrared sensing element, process the analog electrical signal according to one of the multiple configurations stored in the information processing chip, obtain a human body infrared sensing result, and ensure that a user can switch between the multiple configurations during use, the problem of traditional human infrared induction signal processing system only be applicable to a technical scheme, the flexibility is poor, can't satisfy the user demand of user's change configuration scheme is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic connection diagram of a human body IR-sensing signal processing system with various configurations according to the present application;
FIG. 2 is a schematic diagram of a signal processing chip according to the present application;
FIG. 3 is a schematic connection diagram of a first configuration of the present application;
FIG. 4 is a schematic connection diagram of a second configuration of the present application;
FIG. 5 is a schematic connection diagram of an embodiment of the present application;
FIG. 6 is a schematic connection diagram of a second embodiment of the present application;
FIG. 7 is a schematic connection diagram of a third embodiment of the present application;
FIG. 8 is a schematic diagram of the connection of a first universal pin and a second universal pin according to the present application;
fig. 9 is a flowchart illustrating a method for processing human body infrared sensing signals according to various configurations of the present application.
Detailed Description
The embodiment of the application provides a human body infrared sensing signal processing system with multiple configuration schemes, which comprises an infrared sensing element and a signal processing chip, wherein the output end of the infrared sensing element is connected with the input end of the signal processing chip, the infrared sensing element is configured to generate an analog electric signal according to a human body infrared signal and output the analog electric signal to the signal processing chip, the signal processing chip is configured to store multiple configuration schemes and is also configured to receive the analog electric signal from the infrared sensing element and process the analog electric signal according to one of the multiple configuration schemes stored in the information processing chip to obtain a human body infrared sensing result, so that a user can switch among the multiple configuration schemes in the using process, and the problem that the traditional human body infrared sensing signal processing system is only suitable for one technical scheme is solved, the flexibility is poor, and the use requirement of a user for replacing the configuration scheme cannot be met. In order to achieve the above object, the technical solutions provided by the embodiments of the present application are described in detail below, specifically with reference to fig. 1 to 8.
Referring to fig. 1, a human body infrared sensing signal processing system with various configurations provided for the embodiments of the present application includes an infrared sensing element 100 and a signal processing chip 200.
The output end of the infrared sensing element 100 is connected to the input end of the signal processing chip 200.
The infrared ray sensing element 100 is configured to acquire a human body infrared ray signal, generate an analog electrical signal according to the human body infrared ray signal, and output the analog electrical signal to the signal processing chip 200. More specifically, the infrared sensing element 100 loses charge balance by acquiring infrared radiation change of a human body, thereby releasing charges outwards and outputting a differential analog electrical signal. And transmits the analog electrical signal to the signal processing chip 200.
The information processing chip 200 is configured to store a plurality of configuration schemes, and is further configured to receive the analog electrical signal from the infrared sensing element 100, and process the analog electrical signal according to one of the plurality of configuration schemes stored in the information processing chip 200, so as to obtain a human body infrared sensing result.
In an embodiment of the present application, referring to fig. 2, the signal processing chip 200 includes: a signal conversion module 210, a filter decimation module 220, a storage module 230, a register control module 240, a motion detection module 250, a user control module 260, and a serial output module 270.
The input end of the signal conversion module 210 is connected to the output end of the infrared sensing element 100, the output end of the signal conversion module 210 is connected to the input end of the filtering and extracting module 220, and the signal conversion module 210 is configured to convert the analog electrical signal into a digital signal and send the digital signal to the filtering and extracting module 220. The signal conversion module 210 is typically a sigma-delta ADC, and adopts a first-order or high-order structure. More specifically, the signal conversion module 210 converts the digital signal into a digital signal, which is typically a low-resolution digital signal with 1 bit or more bits. The analog electric signal is converted into a digital signal, so that subsequent processing is facilitated.
The filtering and decimating module 220 is configured to filter a high frequency signal of the digital signals to obtain a high resolution digital signal. The sampling frequency of the high-resolution digital signal filtered by the filtering and extracting module 220 can be reduced to about 1khz, so that the sensitivity of the system for processing human body infrared ray induction is effectively improved, and the use requirements under different use environments are met.
The output of the storage module 230 is connected to the input of the register control module 240, and the storage module 230 is configured to store at least one configuration scheme. The configuration scheme may be plural, for example, the configuration scheme includes a first configuration scheme and a second configuration scheme. The first configuration scheme is to connect the output end of the filtering and extracting module 220 with the input end of the motion detecting module 250, and the motion detecting module 250 is configured to process the high-resolution digital signal to obtain the human infrared sensing result. The second configuration scheme is to connect the output terminal of the filtering and decimation module 220 with the input terminal of the serial output module 270, and the serial output module 270 is configured to receive the high resolution digital signal and convert the high resolution digital signal into serial data for output. The storage module (230) is further configured to store setting parameters, the setting parameters include sensitivity information, lighting delay time information and working mode information, the sensitivity information is used for controlling the system sensitivity, the lighting delay time information is used for controlling the system detection lighting time, and the working mode information is used for controlling the system detection lighting mode.
More specifically, in an embodiment of the present application, when the user needs to set the sensitivity, the user control module 260 sets the sensitivity, and after the register control module 240 receives the setting parameter, the sensitivity information is acquired by the motion detection module 250 or the microprocessor 300, and the information is adjusted, and the sensitivity information is stored in the storage module 230. When the system is operated again, the registration control module 240 directly acquires the sensitivity information from the storage module 230.
More specifically, in an embodiment of the present application, when the user needs to set the lighting delay time, the user control module 260 sets the lighting delay time, and after the registration control module 240 receives the lighting delay time information, the sensitivity information is obtained by the motion detection module 250 or the microprocessor 300, so as to adjust the lighting delay time information, and store the lighting delay time information in the storage module 230. When the system is operated again, the register control module 240 directly obtains the lighting delay time information from the storage module 230.
More specifically, in an embodiment of the present application, when a user needs to set a working mode, the user control module 260 sets the working mode, and after the register control module 240 receives the working mode information, the working mode information is acquired by the motion detection module 250 or the microprocessor 300, and the working mode information is adjusted and stored in the storage module 230. When the system works again, the register control module 240 directly obtains the working mode information from the storage module 230, where the working mode information at least includes: the control method comprises a manual light-on mode, a manual light-off mode, a delayed light-off enabling mode, a PIR induction reset delayed light-off time mode and a photosensitive light-on control mode.
The storage module 230 is further configured to store enable switches corresponding to the signal conversion module 210, the filtering and decimation module 220, the register control module 240, the motion detection module 250, the user control module 260, and the serial output module 270.
An output end of the user control module 260 is connected to an input end of the register control module 240, the user control module 260 is configured to receive an instruction from a user, send the instruction to the register control module 240, and change the configuration scheme, and the user control module 260 is further configured to receive a setting parameter from the user, and send the setting parameter to the register control module 240; user control module 260 is further configured to send enable switch control instructions to register control module 240;
the register control module 240 is respectively connected to the storage module 230, the motion detection module 250, the user control module 260, and the serial output module 270, and the register control module 240 is configured to receive an instruction from the user control module 260, obtain a first configuration scheme or a second configuration scheme from the storage module 230, and configure the filter extraction module 220, the motion detection module 250, and the serial output module 270 according to the first configuration scheme or the second configuration scheme. The registration control module 240 is further configured to configure the motion detection module 250 according to the setting parameters from the user and store the setting parameters in the storage module 230.
Referring to fig. 3, the first configuration scheme is to connect the output end of the filtering and extracting module 220 with the input end of the motion detecting module 250, and the motion detecting module 250 is configured to process the high-resolution digital signal to obtain the human infrared sensing result.
When the information processing chip 200 is configured as the first configuration scheme, the infrared sensing element 100 obtains an analog electrical signal by acquiring the infrared radiation change of the human body. And transmits the analog electrical signal to the signal processing chip 200. The signal conversion module 210 converts the analog electrical signal into a digital signal, and after the digital signal is filtered by the filtering extraction module 220, the motion detection module 250 judges the high-resolution digital signal to obtain a human body infrared sensing result.
In an embodiment of the present application, a user sends an instruction to the register control module 240 to change to the first configuration scheme, and the register control module 240 obtains the first configuration scheme from the storage module 230, disconnects the output terminal of the filter extraction module 220 from the input terminal of the serial output module 270, and connects the output terminal of the filter extraction module 220 with the input terminal of the motion detection module 250.
Referring to fig. 4, the second configuration scheme is to connect the output terminal of the filtering and decimation module 220 with the input terminal of the serial output module 270, and the serial output module 270 is configured to receive the high resolution digital signal and convert the high resolution digital signal into serial data for output.
When the information processing chip 200 is configured in the second configuration scheme, and when the information processing chip 200 is configured in the first configuration scheme, the infrared sensing element 100 obtains an analog electrical signal by acquiring infrared radiation change of a human body. And transmits the analog electrical signal to the signal processing chip 200. The signal conversion module 210 converts the analog electrical signal into a digital signal, the digital signal is filtered by the filtering extraction module 220, the digital signal is converted into serial data through the serial output module, the serial data is sent to the microcontroller 300, and the microcontroller 300 judges the serial data to obtain a human body infrared sensing result.
In an embodiment of the present application, a user sends an instruction to the register control module 240 to change to the second configuration scheme, and the register control module 240 obtains the second configuration scheme from the storage module 230, disconnects the output terminal of the filter extraction module 220 from the input terminal of the motion detection module 250, and connects the output terminal of the filter extraction module 220 with the input terminal of the serial output module 270.
The register control module 240 is further configured to obtain the corresponding enable switch from the storage module 230 according to the enable switch control instruction, and control the signal conversion module 210, the filtering extraction module 220, the register control module 240, the motion detection module 250, the user control module 260, and the serial output module 270.
In an embodiment of the present application, referring to fig. 5, the system further includes a microcontroller 300 externally connected to the signal processing chip 200.
The input end of the microcontroller 300 is connected to the output end of the serial output module 270, and the microcontroller 300 is configured to receive the serial data and process the serial data to obtain the human infrared sensing result.
In an embodiment of the present application, the register control module 240 is further configured to obtain a second configuration scheme from the storage module 230 when the signal processing chip 200 is externally connected to the microcontroller 300, and configure the signal processing chip 200 according to the second configuration scheme. The register control module 240 is further configured to configure the microcontroller 300 according to the setting parameters from the user and store the setting parameters in the storage module 230.
In an embodiment of the present application, the storage module 230 is a non-volatile memory. A non-volatile memory (NVM) refers to a computer memory in which stored data does not disappear when the current is turned off. By embedding the nonvolatile memory inside the signal processing chip 200, the signal processing chip 200 does not need to add an additional pin, the size of a printed board in the manufacturing process of the signal processing chip 200 is effectively reduced, and the production cost is saved.
Meanwhile, by storing various configuration schemes in the nonvolatile memory, a user can flexibly switch among the various configuration schemes, and the use requirements under different use conditions are met.
In an embodiment of the present application, the signal processing chip 200 further includes a low-pass filtering module 211, an input end of the low-pass filtering module 211 is connected to an output end of the filtering decimation module 220, and the low-pass filtering module 211 is configured to re-filter the high-frequency signal in the high-resolution digital signal to obtain a secondary filtered high-resolution digital signal. The sampling frequency of the high-resolution digital signal after being filtered by the low-pass filtering module 211 is reduced to about 7 hz. The sensitivity of the system for processing the human body infrared induction is effectively improved, and the use requirements under different use environments are met.
In an embodiment of the present application, the signal processing chip 200 further includes a high-pass filtering module 212, an input end of the high-pass filtering module 212 is connected to an output end of the low-pass filtering module 211, and the high-pass filtering module 212 is configured to filter a direct current component in the secondary filtered high-resolution digital signal to obtain a tertiary filtered high-resolution digital signal. The sensitivity of the system for processing the human body infrared induction is effectively improved, and the use requirements under different use environments are met.
Referring to fig. 6, in an embodiment of the present application, an output of the high-pass filtering module 212 is connected to an input of the motion detection module 250. Is applied to the first configuration scheme. The sensitivity of the system can be effectively improved, and the use requirements under different use environments are met.
Referring to fig. 7, in an embodiment of the present application, the output terminal of the high-pass filtering module 212 is connected to the input terminal of the serial output module 270. To the second configuration scheme. The sensitivity of the system can be effectively improved, and the use requirements under different use environments are met.
In an embodiment of the present application, the user control module 260 may be controlled by a key or an adjustable resistor. The key control is that the user can control the on and off of the lamp through the key, or adjust the sensitivity, the lamp-on delay time and the working mode parameters through the times or the combination of the key. The adjustable resistor can configure the sensitivity and the lighting delay time parameter for a user by adjusting the resistance value of the resistor.
In an embodiment of the present application, the motion detection module further includes a first universal pin 2601 and a second universal pin 2602, referring to fig. 8, the first universal pin 2601 is respectively connected to the motion detection module 250, the user control module 260, and the serial output module 270, and the second universal pin 2602 is respectively connected to the motion detection module 250, the user control module 260, and the serial output module 270. More specifically, when the signal processing chip 200 operates, it can be determined that the current control mode is the key control or the adjustable resistance control by detecting the voltage value between the first general pin 2601 and the second general pin 2602, and parameters such as the sensitivity and the lighting delay time are controlled.
In a second aspect, referring to fig. 9, the present application provides a human body infrared sensing signal processing method having various configurations, the method including:
s1, acquiring a configuration scheme change instruction;
the configuration scheme changing instruction is selected by a user according to actual use requirements, at least one configuration scheme is adopted, and the configuration scheme can be various.
S2, acquiring the corresponding configuration scheme according to the configuration scheme change instruction;
the configuration scheme is pre-stored in the signal processing chip, and the configuration scheme may be multiple, for example, the configuration scheme includes a first configuration scheme and a second configuration scheme. The first configuration scheme is that the analog electric signals are converted into digital signals and then processed to obtain a human body infrared sensing result. The second configuration scheme is that analog electric signals are converted into digital signals, the high-resolution digital signals are converted into serial data to be output, and the serial data are processed through an external microcontroller to obtain a human body infrared sensing result.
S3, configuring according to the configuration scheme;
s4, acquiring analog electric signals;
the analog electric signal comes from the infrared sensing element, and the infrared sensing element acquires the human body infrared signal and generates the analog electric signal according to the human body infrared signal.
And S5, processing the analog electric signal to obtain a human body infrared sensing result.
After the analog electric signal is converted into a digital signal, the digital signal is processed through a self motion detection module or an external microprocessor to obtain a human body infrared sensing result. Preferably, the digital signal can be filtered for multiple times to obtain a high-resolution digital signal, so that the system induction sensitivity is effectively improved, and the use requirements under different use environments are met.
The method further comprises the following steps:
acquiring setting parameters stored in a system, wherein the setting parameters comprise sensitivity information, lighting delay time information and working mode information, the sensitivity information is used for controlling the sensitivity of the system, the lighting delay time information is used for controlling the lighting detection time of the system, and the working mode information is used for controlling the lighting detection mode of the system;
and setting the system according to the setting parameters.
The method further comprises the following steps:
acquiring setting parameters from a user, wherein the setting parameters comprise sensitivity information, lighting delay time information and working mode information, the sensitivity information is used for controlling the sensitivity of the system, the lighting delay time information is used for controlling the lighting detection time of the system, and the working mode information is used for controlling the lighting detection mode of the system;
setting the system according to the setting parameters;
storing the setting parameters in a system.
The above method of the present application may be performed as described in the system embodiment, and is not described herein again.
As can be seen from the above, the technical solution provided by the embodiment of the present application includes an infrared sensing element and a signal processing chip, an output end of the infrared sensing element is connected to an input end of the signal processing chip, the infrared sensing element is configured to generate an analog electrical signal according to a human body infrared signal and output the analog electrical signal to the signal processing chip, the signal processing chip is configured to store a plurality of configuration schemes, and is further configured to receive the analog electrical signal from the infrared sensing element and process the analog electrical signal according to one of the plurality of configuration schemes stored in the signal processing chip to obtain a human body infrared sensing result, so as to ensure that a user can switch between the plurality of configuration schemes during use, thereby solving the problem that a conventional human body infrared sensing signal processing system is only suitable for one technical scheme, the flexibility is poor, and the use requirement of a user for replacing the configuration scheme cannot be met.
Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A human body infrared sensing signal processing system with multiple configuration schemes is characterized by comprising an infrared sensing element (100) and a signal processing chip (200);
the output end of the infrared sensing element (100) is connected with the input end of the signal processing chip (200);
the infrared sensing element (100) is configured to acquire a human body infrared signal, generate an analog electrical signal according to the human body infrared signal, and output the analog electrical signal to the signal processing chip (200);
the signal processing chip (200) is configured to store a plurality of configuration schemes, and is further configured to receive the analog electric signal from the infrared sensing element (100), and process the analog electric signal according to one of the plurality of configuration schemes stored in the signal processing chip (200) to obtain a human body infrared sensing result.
2. The human body infrared sensing signal processing system having various configurations according to claim 1, wherein the signal processing chip (200) includes: the device comprises a signal conversion module (210), a filtering and extracting module (220), a storage module (230), a register control module (240), a motion detection module (250), a user control module (260) and a serial output module (270);
the input end of the signal conversion module (210) is connected with the output end of the infrared sensing element (100), the output end of the signal conversion module (210) is connected with the input end of the filtering and extracting module (220), and the signal conversion module (210) is configured to convert the analog electric signal into a digital signal and send the digital signal to the filtering and extracting module (220);
the filtering and extracting module (220) is configured to filter a high-frequency signal in the digital signal to obtain a high-resolution digital signal;
the output end of the storage module (230) is connected with the input end of the register control module (240), the storage module (230) is configured to store configuration schemes, and the configuration schemes at least comprise a first configuration scheme and a second configuration scheme; the storage module (230) is further configured to store setting parameters including sensitivity information, lighting delay time information, and operation mode information;
the sensitivity information is used for controlling the system sensitivity;
the lighting delay time information is used for controlling the detection lighting time of the system;
the working mode information is used for controlling a detection lighting mode of the system;
the storage module (230) is further configured to store enable switches corresponding to the signal conversion module (210), the filtering and extracting module (220), the register control module (240), the motion detection module (250), the user control module (260) and the serial output module (270);
an output end of the user control module (260) is connected with an input end of the register control module (240), the user control module (260) is configured to receive an instruction from a user, send the instruction to the register control module (240), and change the configuration scheme, the user control module (260) is further configured to receive a setting parameter from the user, and send the setting parameter to the register control module (240); the user control module (260) is further configured to send an enable switch control instruction to the register control module (240);
the register control module (240) is respectively connected with the storage module (230), the motion detection module (250), the user control module (260) and the serial output module (270), the register control module (240) is configured to receive an instruction from the user control module (260), obtain a first configuration scheme or a second configuration scheme from the storage module (230), and configure the filtering extraction module (220), the motion detection module (250) and the serial output module (270) according to the first configuration scheme or the second configuration scheme; the registration control module (240) is further configured to configure the motion detection module (250) according to the setting parameters from a user and store the setting parameters in the storage module (230);
the first configuration scheme is that the output end of the filtering and extracting module (220) is connected with the input end of the motion detection module (250), and the motion detection module (250) is configured to process the high-resolution digital signal to obtain a human body infrared sensing result;
the second configuration scheme is that the output end of the filtering and extracting module (220) is connected with the input end of the serial output module (270), and the serial output module (270) is configured to receive the high-resolution digital signal and convert the high-resolution digital signal into serial data to be output;
the register control module (240) is further configured to obtain a corresponding enable switch from the storage module (230) according to the enable switch control instruction, and control the signal conversion module (210), the filtering extraction module (220), the register control module (240), the motion detection module (250), the user control module (260), and the serial output module (270).
3. The human body infrared sensing signal processing system having various configurations according to claim 2, further comprising a microcontroller (300) externally connected to the signal processing chip (200);
the microcontroller (300) is configured to receive the serial data, process the serial data and obtain a human body infrared sensing result.
4. The human body infrared sensing signal processing system having a plurality of configurations according to claim 3, wherein the register control module (240) is further configured to acquire a second configuration from the storage module (230) when the signal processing chip (200) is externally connected to the microcontroller (300), configure the signal processing chip (200) according to the second configuration, and configure the microcontroller (300) according to the setting parameters from a user and store the setting parameters in the storage module (230).
5. The human body infrared sensing signal processing system having various configurations according to claim 4, wherein the storage module (230) is a non-volatile memory.
6. The human body infrared sensing signal processing system with multiple configurations according to claim 5, wherein the signal processing chip (200) further comprises a low-pass filtering module (211), an input end of the low-pass filtering module (211) is connected to an output end of the filtering decimation module (220), and the low-pass filtering module (211) is configured to re-filter a high-frequency signal in the high-resolution digital signal to obtain a second-filtered high-resolution digital signal.
7. The human body infrared sensing signal processing system with multiple configurations according to claim 6, wherein the signal processing chip (200) further comprises a high-pass filtering module (212), an input end of the high-pass filtering module (212) is connected to an output end of the low-pass filtering module (211), and the high-pass filtering module (212) is configured to filter a direct current component in the second-filtered high-resolution digital signal to obtain a third-filtered high-resolution digital signal.
8. The human body infrared sensing signal processing system with multiple configurations of claim 5, wherein the control manner of the user control module (260) can be a key control or an adjustable resistance control.
9. The human body infrared sensing signal processing system with multiple configurations according to claim 8, further comprising a first general pin (2601) and a second general pin (2602), wherein the first general pin (2601) is connected to the motion detection module (250), the user control module (260), and the serial output module (270), respectively, and the second general pin (2602) is connected to the motion detection module (250), the user control module (260), and the serial output module (270), respectively.
10. A human body infrared sensing signal processing method with a plurality of configuration schemes is characterized by comprising the following steps:
acquiring a configuration scheme change instruction;
acquiring a corresponding configuration scheme according to the configuration scheme change instruction;
configuring according to the configuration scheme;
acquiring an analog electric signal;
and processing the analog electric signal to obtain a human body infrared sensing result.
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