Mining infrared pyroelectric area monitoring circuit topology and signal processing method

Abstract

The invention belongs to the field of electronic monitoring, particularly relates to a mining infrared pyroelectric area monitoring circuit topology and a signal processing method, and aims to solve the problems that the existing monitoring means cannot realize area-based and distance-based monitoring and is easily influenced by temperature difference, so that the monitoring result is inaccurate. According to the invention, a long-distance detection unit control circuit, a switch control power supply and a short-distance detection unit control circuit are connected in parallel; the power supply end of the long-distance detection unit is connected to the first end of the switch control unit; the inductance end of the long-distance detection unit is connected to the first end of the first inductor; the second end of the first inductor is connected to the second end of the switch control unit, the output end of the long-distance detection unit is connected to the first end of the second inductor, and the second end of the second inductor is connected to the second end of the switch control unit. According to the invention, regional and distance-based alarm can be realized, temperature influence is avoided, and the number of people entering the region is monitored.

Description

Background Art

[0002] In recent years, China's coal industry has been continuously transformed and upgraded towards the directions of safety, greenness, high efficiency, and intelligence, with the degree of mechanization, automation, informatization, and intelligence in coal mines getting higher and higher. The coal mine environment is complex, with potential safety hazards such as fires and gas. The pyroelectric infrared sensor can monitor the temperature change in real time, detect potential fire sources and abnormal situations in a timely manner, thereby improving the safety guarantee for miners. The space in the underground coal mine is limited, and it may be difficult to directly approach some areas for monitoring. The pyroelectric infrared sensor can achieve remote monitoring without the need for personnel to approach dangerous areas, and transmit the monitoring data to the control center through wireless transmission and other means, facilitating the management personnel to understand the underground situation in real time. Currently, most area alarm devices adopt UWB technology and machine vision recognition technology as detection means, and control the corresponding equipment to alarm or stop by judging whether personnel enter the dangerous area. However, for trackless rubber-tired vehicles, the traveling route environment is complex and there are many situations of personnel coming and going and giving way. If UWB or machine vision technology is used as the personnel detection means for trackless rubber-tired vehicles, it is not conducive to personnel monitoring and the division of alarm and stop areas. For the above-ground area, during the process of trackless rubber-tired vehicles passing by or giving way to each other, alarming easily causes the vehicle to stall, thus affecting the normal operation of the vehicle. Therefore, short-distance alarm needs to be achieved, while in the underground area, it is more dangerous and long-distance alarm needs to be achieved. When the existing pyroelectric infrared is used as the detection means, it can only achieve alarm within a certain distance, and cannot achieve sub-region and sub-distance alarm between the safe area and the dangerous area, and is easily affected by the temperature difference in the mine area, resulting in inaccurate monitoring results. Summary of the Invention

[0003] In order to solve the above problems in the prior art, that is, to achieve sub-region and sub-distance alarm between the safe area and the dangerous area, and being easily affected by the temperature difference in the mine area, resulting in inaccurate monitoring results, the present invention provides a circuit topology of a mine-used pyroelectric infrared area monitor, and the circuit topology includes:

[0004] a switch control unit, a control circuit for a long-distance detection unit, and a control circuit for a short-distance detection unit;

[0005] The control circuit for the long-distance detection unit, the switch control power supply, and the control circuit for the short-distance detection unit are connected in parallel;

[0006] The long-distance detection unit control circuit includes: the first ends of a ninth resistor and a tenth resistor are connected to the first end of a switch control unit; the second end of the ninth resistor is connected to the negative electrode of a second diode, the positive electrode of the second diode is connected to the first end of a seventh resistor, and the second end of the seventh resistor is connected to the second end of the long-distance detection unit; the second end of the tenth resistor is connected to the first end of a first triode, the second end of the first triode is connected to the first end of an eighth resistor, and the second end of the eighth resistor is connected to the second end of a switch control terminal unit; the base of the first triode is connected to the second end of the ninth resistor; the first triode is an NPN-type triode;

[0007] The power supply end of the long-distance detection unit is connected to the first end of the switch control unit; the inductor end of the long-distance detection unit is connected to the first end of a first inductor; the second end of the first inductor is connected to the second end of the switch control unit, the output end of the long-distance detection unit is connected to the first end of a second inductor, and the second end of the second inductor is connected to the second end of the switch control unit.

[0008] In a preferred embodiment, the switch control unit includes:

[0009] The first end of the switch is connected as the first end of the switch control unit, the second end of the switch is connected to the positive electrode of the power supply VCC, and the negative electrode of the power supply VCC is the second end of the switch control unit.

[0010] In a preferred embodiment, the short-distance detection unit control circuit includes:

[0011] The first ends of a first resistor, a second resistor and the input end of a second triode are connected to the first end of a switch control power supply;

[0012] The base of the second triode and the second end of the second resistor are connected to the output end of a third triode, and the base of the third triode is connected to the second end of the first resistor; the input end of the third triode is connected to the second end of the switch control unit; the second end of the first resistor is connected to the first end of a photosensitive resistor Rq, and the second end of the photosensitive resistor Rq is connected to the second end of the switch control unit;

[0013] The first ends of a third resistor and a fifth resistor are connected in parallel to the output end of the second triode; the second end of the third resistor is connected to the positive electrode of a first diode, the negative electrode of the first diode is connected to the first end of a fourth resistor, and the second end of the fourth resistor is connected to the second end of the switch control unit; the second end of the fifth resistor is connected to the input end of a fourth triode, the base of the fourth triode is connected to the positive electrode of the first diode, the output end of the fourth triode is connected to the first end of a sixth resistor, and the second end of the sixth resistor is connected to the second end of the switch control power supply;

[0014] The output terminal of the second triode is connected to the power supply terminal of the short - distance detection unit. The inductance terminal of the short - distance detection power supply is connected to the first end of the third inductor, and the output terminal of the short - distance detection power supply is connected to the first end of the fourth inductor. The second end of the third inductor and the second end of the fourth inductor are connected in parallel to the second end of the switch control unit.

[0015] In a preferred embodiment, the operation of the circuit topology includes: when the circuit topology is outside the well, the operation of the short - distance detection unit control circuit:

[0016] When outside the well, the photoresistor Rq is very small, much smaller than the first resistor. The first resistor and the photoresistor Rq divide the voltage, and the second triode cannot conduct. The voltage at the second end of the second resistor is pulled up, resulting in the third triode not being able to conduct. At this time, the short - distance detection unit control circuit has no output voltage, the short - distance detection unit does not work, and does not detect short - distance personnel information.

[0017] In a preferred embodiment, the operation of the circuit topology includes: when the circuit topology is outside the well, the operation of the long - distance detection unit control circuit:

[0018] For the long - distance detection unit control circuit: when the outdoor temperature rises, the temperature of the first triode rises, the base current of the first triode increases, and the higher the temperature, the greater the current, which causes the entire long - distance detection unit control circuit to be unstable and affects the detection distance of the long - distance detection unit. A voltage - dividing bias circuit composed of the seventh resistor, the ninth resistor, and the second diode provides a DC working voltage for the base of the first triode. After the second diode conducts, when the temperature rises, the tube voltage of the first diode will drop. The drop in the tube voltage of the first diode causes the base voltage of the first triode to drop, thereby reducing the base current of the first triode and ensuring the stability of the long - distance detection unit control circuit, which is not affected by temperature.

[0019] In a preferred embodiment, the operation of the circuit topology further includes the operation of the circuit topology when the circuit topology is inside the well:

[0020] For the short - distance detection unit control circuit, the photosensitive resistor Rq is very large, much larger than the first resistor. The first resistor and the photosensitive resistor Rq divide the voltage, ensuring that the third triode conducts. The voltage at the lower end of the second resistor is very small, which causes the second triode Q2 to conduct, and the short - distance detection unit control circuit has an output voltage. When the temperature of the fourth triode rises, the base current increases, and the higher the temperature, the greater the current, resulting in poor temperature stability of the fourth triode and easily affecting the detection distance of the short - distance detection unit. The voltage - dividing bias circuit composed of the third resistor, the fourth resistor, and the first diode, after the first diode conducts, when the temperature rises, the tube voltage of the first diode will decrease. The decrease in the tube voltage of the first diode causes the base voltage of the fourth triode to decrease, making the base current of the fourth triode decrease, playing a role in stabilizing the base current of the fourth triode and making the operation of the short - distance detection unit stable; the second triode is a PNP - type triode; the third triode is a PNP - type triode; the fourth triode is an NPN - type triode.

[0021] For the long - distance detection unit control circuit, when the outdoor temperature rises, the temperature of the first triode rises, and the base current of the first triode increases. The higher the temperature, the greater the current, resulting in instability of the entire long - distance detection unit control circuit and affecting the detection distance of the long - distance detection unit. The voltage - dividing bias circuit composed of the seventh resistor, the ninth resistor, and the second diode provides a DC working voltage for the base of the first triode. After the second diode conducts, when the temperature rises, the tube voltage of the first diode will decrease. The decrease in the tube voltage of the first diode causes the base voltage of the first triode to decrease, thereby the base current of the first triode decreases, ensuring the stability of the long - distance detection unit control circuit and being unaffected by temperature.

[0022] In the second aspect of the present invention, a signal processing method for the topology of a mine - used infrared pyroelectric area monitoring circuit is proposed. Based on the topology of the mine - used infrared pyroelectric area monitoring circuit mentioned above to obtain signals, the method includes:

[0023] Obtain the detection signals of the topology of the mine - used infrared pyroelectric area monitoring circuit;

[0024] Use the ICA algorithm to separate the detection signals to obtain the separated signals;

[0025] Calculate the coherence measure of any two signals based on the auto - spectral density of each signal;

[0026] Judge the type of signal based on the coherence measure of all signals, and the type of signal is the number of people close to the topology of the mine - used infrared pyroelectric area monitoring circuit.

[0027] In a preferred embodiment, calculating the coherence measure of any two signals based on the auto - spectral density of each signal includes:

[0028] Among them, S xx (f) is the auto-spectral density of the first signal, and S yy (f) is the auto-spectral density of the second signal, and S xy (f) is the cross-spectral density of the first signal and the second signal, and γ xy (f) is a coherence measure.

[0029] In a preferred embodiment, determining the type of signal based on the coherence measure of all signals includes:

[0030] If the coherence measure of two signals is greater than the threshold, it is considered that the two signals are of the same type; if the coherence measure of two signals is less than the threshold, it is considered that the two signals are of two types.

[0031] Advantages of the present invention:

[0032] (1) The mine-used infrared pyroelectric area monitoring circuit topology of the present application can achieve sub-region and sub-distance monitoring of the safe area and the dangerous area, realize long-distance and short-distance alarms simultaneously in the dangerous area, and realize long-distance monitoring in the safe area, so as to not affect the vehicle operation in the safe area above the well and conduct long-distance and short-distance real-time monitoring in the dangerous area underground;

[0033] (2) The mine-used infrared pyroelectric area monitoring circuit topology of the present application can be free from the influence of environmental temperature difference, be more stable, and have good monitoring effects;

[0034] (3) The signal processing method of the mine-used infrared pyroelectric area monitoring circuit topology of the present application can accurately separate signals, monitor the number of people entering the area, and achieve accurate detection. Description of the Drawings

[0035] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, purposes, and advantages of the present application will become more obvious:

[0036] Figure 1 is a schematic diagram of a mine-used infrared pyroelectric area monitoring circuit topology according to an embodiment of the present invention;

[0037] Figure 2 is the connection method between a mine-used infrared pyroelectric sensor circuit topology and an alarm device according to an embodiment of the present invention;

[0038] Figure 3 is a schematic diagram of the structure of a computer system of a server for implementing the method, system, and device embodiments of the present application. Detailed Embodiments

[0039] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention and are not intended to limit the invention. In addition, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0040] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0041] The present invention provides a topology of a mine-used infrared pyroelectric area monitoring circuit, as Figure 1 shown, the circuit topology includes:

[0042] a switch control unit, a long-distance detection unit control circuit, and a short-distance detection unit control circuit;

[0043] The long-distance detection unit control circuit, the switch control power supply, and the short-distance detection unit control circuit are connected in parallel;

[0044] In this embodiment, the switch control unit includes: the first end of the switch is connected as the first end of the switch control unit, the second end of the switch is connected to the positive pole of the power supply VCC, and the negative pole of the power supply VCC is the second end of the switch control unit.

[0045] The long-distance detection unit control circuit includes: the first ends of the ninth resistor and the tenth resistor are connected to the first end of the switch control unit; the second end of the ninth resistor is connected to the negative pole of the second diode, the positive pole of the second diode is connected to the first end of the seventh resistor, and the second end of the seventh resistor is connected to the second end of the long-distance detection unit; the second end of the tenth resistor is connected to the first end of the first triode, the second end of the first triode is connected to the first end of the eighth resistor, and the second end of the eighth resistor is connected to the second end of the switch control terminal unit; the base of the first triode is connected to the second end of the ninth resistor; the first triode is an NPN-type triode;

[0046] The power supply end of the long-distance detection unit is connected to the first end of the switch control unit; the inductance end of the long-distance detection unit is connected to the first end of the first inductor; the second end of the first inductor is connected to the second end of the switch control unit, the output end of the long-distance detection unit is connected to the first end of the second inductor, and the second end of the second inductor is connected to the second end of the switch control unit.

[0047] In this embodiment, the short-distance detection unit control circuit includes:

[0048] The first end of the first resistor, the first end of the second resistor, and the input end of the second triode are connected to the first end of the switch control power supply;

[0049] The base of the second triode and the second end of the second resistor are connected to the output end of the third triode, and the base of the third triode is connected to the second end of the first resistor; the input end of the third triode is connected to the second end of the switch control unit; the second end of the first resistor is connected to the first end of the photosensitive resistor Rq, and the second end of the photosensitive resistor Rq is connected to the second end of the switch control unit;

[0050] The first ends of the third resistor and the fifth resistor are connected in parallel to the output end of the second triode; the second end of the third resistor is connected to the positive electrode of the first diode, the negative electrode of the first diode is connected to the first end of the fourth resistor, and the second end of the fourth resistor is connected to the second end of the switch control unit; the second end of the fifth resistor is connected to the input end of the fourth triode, the base of the fourth triode is connected to the positive electrode of the first diode, and the output end of the fourth triode is connected to the first end of the sixth resistor, and the second end of the sixth resistor is connected to the second end of the switch control power supply; the second triode is a PNP type triode; the third triode is a PNP type triode; the fourth triode is an NPN type triode.

[0051] The output end of the second triode is connected to the power supply end of the short-distance detection unit, the inductance end of the short-distance detection power supply is connected to the first end of the third inductor, and the output end of the short-distance detection power supply is connected to the first end of the fourth inductor; the second ends of the third inductor and the fourth inductor are connected in parallel to the second end of the switch control unit.

[0052] It should be noted that the topology of the mine-used infrared pyroelectric area monitoring circuit provided in the above embodiment is only illustrated by the division of the above function modules. In actual applications, the above functions can be allocated to different function modules according to needs, that is, the modules or steps in the embodiments of the present invention can be further decomposed or combined. For example, the modules in the above embodiment can be combined into one module, or further split into multiple sub-modules to complete all or part of the functions described above. For the names of the modules and steps involved in the embodiments of the present invention, they are only used to distinguish each module or step, and are not regarded as an improper limitation of the present invention.

[0053] The signal processing method of the topology of the mine-used infrared pyroelectric area monitoring circuit according to the second embodiment of the present invention obtains signals based on the topology of the mine-used infrared pyroelectric area monitoring circuit described above. The method includes:

[0054] Obtain the detection signal of the topology of the mine-used infrared pyroelectric area monitoring circuit;

[0055] Use the ICA algorithm to separate the detection signal to obtain each separated signal;

[0056] In this embodiment, calculating the coherence measure of any two signals based on the auto-spectral density of each signal includes: Among them, S xx (f) is the auto-spectral density of the first signal, and S yy (f) is the auto-spectral density of the second signal, and S xy (f) is the cross-spectral density of the first signal and the second signal, and γ xy (f) is the coherence measure.

[0057] Calculate the coherence measure between any two signals based on the auto-spectral density of each signal;

[0058] Judge the type of signal based on the coherence measure of all signals. The type of signal is the number of people close to the circuit topology of the mine-used pyroelectric infrared area monitoring.

[0059] Judging the type of signal based on the coherence measure of all signals includes: if the coherence measure of two signals is greater than the threshold, it is considered that the two signals are of the same type; if the coherence measure of two signals is less than the threshold, it is considered that the two signals are of two types.

[0060] In the above embodiments, although each step is described in the above order, those skilled in the art can understand that in order to achieve the effects of this embodiment, different steps do not have to be executed in such an order. They can be executed simultaneously (in parallel) or in a reversed order, and these simple changes are all within the protection scope of the present invention.

[0061] In this embodiment, both the long-distance detection unit and the short-distance detection unit are pyroelectric infrared sensors. Optionally, there are two long-distance detection units, and the detection angle formed by them is 180°. The farthest detection distance can be set to 0-9 meters; the long-distance detection element can be a stop signal, and when a person enters the 9-meter range, an alarm signal is output;

[0062] For the short-distance detection element, the detection angle formed by them is 180°, and the detection distance range can be set to 0-4 meters; the short-distance detection element can be used as a stop signal, and when a person enters the 4-meter range, a stop signal is output;

[0063] Optionally, the present invention provides a connection method between the circuit topology of the mine-used pyroelectric infrared sensor and the alarm device, such as Figure 2As shown in the figure, the display screen in the display controller can display the information of 6 pyroelectric sensors, including alarm information (yellow warning) and shutdown information (red warning). The No. 1 to No. 6 mine-used infrared pyroelectric sensors are cascade-mounted in the fixed area of the vehicle through aviation plug IN and OUT ports. Select the No. 1 and No. 6 pyroelectric sensors to connect to the display controller (powered by 12V in sequence, and the corresponding sensor numbers and alarm information are transmitted to the display controller by 232 in sequence. The relay output of the display controller is connected to the vehicle pneumatic control valve, fuel injection valve and audible and visual alarm).

[0064] The 6 infrared pyroelectric sensors are selected to be cascaded. If the No. 3 sensor fails and cannot supply power or transmit data, the No. 1, 2, 4, 5, and 6 sensors can still be used. The power supply of the No. 4, 5, and 6 sensors is provided by connecting to the No. 6 sensor of the display controller. The 232 signal is transmitted to the display controller in sequence from 4→5→6, and the 232 signal is transmitted to the display controller in sequence from 2→1.

[0065] If the detection distances of the detection elements 21 and 22 of the mine-used infrared pyroelectric sensor are set to 9m, and the detection distances of the detection elements 11 and 12 are set to 4m, 9m is set as the early warning area and 4m is set as the prohibited area.

[0066] For example, when the detection element 22 or 21 of the No. 3 pyroelectric sensor detects that a person enters the range within 9m from a distance, this sensor can transmit this information to the display control box through the RS232 communication of the cascaded infrared pyroelectric sensors. After the display control box performs temperature compensation processing, at this time, the display control box outputs an alarm signal, and the normally open point 1 becomes closed, and the audible and visual alarm emits an audible and visual alarm warning. The voice broadcast can be set through the audible and visual alarm. When this person continues to approach the dangerous area and the detection element 11 or 12 of the No. 3 pyroelectric sensor detects that a person enters the range within 4m, this sensor can transmit this information to the display control box through the RS232 communication of the cascaded infrared pyroelectric sensors. After the display control box performs temperature compensation processing, at this time, the relay of the display control box acts, and the two normally closed points 1 and 2 become open points, the pneumatic control valve and the fuel injection solenoid valve are closed, and the vehicle shuts down and stops. The normally open point 2 becomes closed, and the audible and visual alarm outputs a shutdown audible and visual warning, and the audible and visual alarm emits a shutdown prompt tone. The voice broadcast can be set through the audible and visual alarm.

[0067] The optical sensor module outside the infrared pyroelectric sensor can distinguish between underground and ground environments. The display controller sets the light intensity threshold: when the light intensity ≥ 50lux, it is considered a ground environment, and at this time, the shutdown signal is shielded and only the alarm signal is retained; when the light intensity ≤ 50lux, it is considered an underground environment, and at this time, no signal is shielded, and the device can alarm or shut down normally.

[0068] When the sensor detects that a person enters the detection range, it transmits the information to the display controller through the 485 signal. After receiving the information, the display controller can correspondingly display the alarm signals of different sensors.

[0069] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working process and related descriptions of the above-described system can refer to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0070] An electronic device according to a third embodiment of the present invention includes: at least one processor; and a memory communicatively connected to at least one of the processors; wherein the memory stores instructions executable by the processor, and the instructions are used to be executed by the processor to implement the signal processing method of the above-described mine-used infrared pyroelectric area monitoring circuit topology.

[0071] A computer-readable storage medium according to a fourth embodiment of the present invention stores computer instructions, and the computer instructions are used to be executed by the computer to implement the signal processing method of the above-described mine-used infrared pyroelectric area monitoring circuit topology.

[0072] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working process and related descriptions of the above-described storage device and processing device can refer to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0073] Those skilled in the art should be able to realize that the modules and method steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. The programs corresponding to the software modules and method steps can be placed in a random access memory (RAM), memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, register, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. To clearly illustrate the interchangeability of electronic hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in the form of electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0074] Next, refer to Figure 3 , which shows a schematic structural diagram of a computer system of a server for implementing the method, system, and device embodiments of the present application. Figure 3The server shown is only an example and should not impose any limitations on the functions and usage scope of the embodiments of the present application.

[0075] As Figure 3 shown, the computer system includes a central processing unit (CPU, Central Processing Unit) 601, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM, Read Only Memory) 602 or the program loaded from the storage section 608 into the random access memory (RAM, Random Access Memory) 603. In the RAM 603, various programs and data required for system operation are also stored. The CPU 601, ROM 602, and RAM 603 are connected to each other via a bus 604. The input / output (I / O, Input / Output) interface 605 is also connected to the bus 604.

[0076] The following components are connected to the I / O interface 605: an input section 606 including a keyboard, a mouse, etc.; an output section 607 including, for example, a cathode ray tube (CRT, Cathode Ray Tube), a liquid crystal display (LCD, Liquid Crystal Display), etc. and a speaker, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as required. A removable medium 611, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 610 as required so that the computer program read from it can be installed into the storage section 608 as required.

[0077] In particular, according to embodiments of the present disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product that includes a computer program carried on a computer-readable medium, and the computer program includes program code for performing the methods shown in the flowcharts. In such an embodiment, the computer program can be downloaded and installed from a network through the communication section 609 and / or installed from the removable medium 611. When the computer program is executed by the central processing unit (CPU) 601, the above functions defined in the methods of the present application are performed. It should be noted that the computer-readable medium described above in the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the two. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of the computer-readable storage medium can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, the computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. And in the present application, the computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, which carries the computer-readable program code. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer-readable signal medium can also be any computer-readable medium other than the computer-readable storage medium, which can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0078] Computer program code for performing the operations of this application can be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0079] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in the flowchart or block diagram can represent a module, a segment of a program, or a part of code that contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks can occur in a different order than that marked in the accompanying drawings. For example, two consecutive blocks shown can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and the combinations of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0080] The terms "first", "second", etc. are used to distinguish similar objects and not to describe or represent a specific order or sequence.

[0081] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or device / equipment that comprises a series of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent in these processes, methods, articles, or devices / equipment.

[0082] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A mine-used infrared pyroelectric area monitoring circuit topology, characterized in that: The circuit topology includes: Switch control unit, long-distance detection unit control circuit, short-distance detection unit control circuit; The long-distance detection unit control circuit, the switch control power supply and the short-distance detection unit control circuit are connected in parallel; The long-distance detection unit control circuit includes: the first ends of the ninth resistor and the tenth resistor are connected to the first end of the switch control unit; the second end of the ninth resistor is connected to the cathode of the second diode, the anode of the second diode is connected to the first end of the seventh resistor, and the second end of the seventh resistor is connected to the second end of the long-distance detection unit; the second end of the tenth resistor is connected to the first end of the first transistor, the second end of the first transistor is connected to the first end of the eighth resistor, and the second end of the eighth resistor is connected to the second end of the switch control end unit; the base of the first transistor is connected to the second end of the ninth resistor; the first transistor is an NPN transistor; The power supply end of the long-distance detection unit is connected to the first end of the switch control unit; the inductance end of the long-distance detection unit is connected to the first end of the first inductor; the second end of the first inductor is connected to the second end of the switch control unit, the output end of the long-distance detection unit is connected to the first end of the second inductor, and the second end of the second inductor is connected to the second end of the switch control unit.

2. The mine infrared pyroelectric area monitoring circuit topology according to claim 1 is characterized in that: The switch control unit comprises: The first end of the switch is connected to the first end of the switch control unit, the second end of the switch is connected to the positive electrode of the power supply VCC, and the negative electrode of the power supply VCC is the second end of the switch control unit.

3. The mine infrared pyroelectric area monitoring circuit topology according to claim 2 is characterized in that: The short-range detection unit control circuit comprises: The first end of the first resistor, the first end of the second resistor and the input end of the second transistor are connected in parallel to the first end of the switch-controlled power supply; The base of the second transistor and the second end of the second resistor are connected in parallel to the output end of the third transistor, and the base of the third transistor is connected to the second end of the first resistor; the input end of the third transistor is connected to the second end of the switch control unit; the second end of the first resistor is connected to the first end of the photoresistor Rq, and the second end of the photoresistor Rq is connected to the second end of the switch control unit; The first end of the third resistor and the first end of the fifth resistor are connected to the output end of the second triode; the second end of the third resistor is connected to the anode of the first diode, the cathode of the first diode is connected to the first end of the fourth resistor, and the second end of the fourth resistor is connected to the second end of the switch control unit; the second end of the fifth resistor is connected to the input end of the fourth triode, the base of the fourth triode is connected to the anode of the first diode, the output end of the fourth triode is connected to the first end of the sixth resistor, and the second end of the sixth resistor is connected to the second end of the switch control power supply; The output end of the second transistor is connected to the power supply end of the short-distance detection unit, the inductance end of the short-distance detection power supply is connected to the first end of the third inductor, and the output end of the short-distance detection power supply is connected to the first end of the fourth inductor; the second end of the third inductor and the second end of the fourth inductor are connected in parallel to the second end of the switch control unit; the second transistor is a PNP transistor; the third transistor is a PNP transistor; and the fourth transistor is an NPN transistor.

4. The mine infrared pyroelectric area monitoring circuit topology according to claim 3 is characterized in that: The operation of the circuit topology includes: when the circuit topology is located outside the well, the operation of the short-range detection unit control circuit: When located outside the well, the photoresistor Rq is much smaller than the first resistor under lighting conditions, the first resistor and the photoresistor Rq divide the voltage, and the second transistor cannot be turned on; the voltage at the second end of the second resistor is pulled high, causing the third transistor to be unable to be turned on. At this time, the short-distance detection unit control circuit has no output voltage, the short-distance detection unit does not work, and does not detect short-distance personnel information.

5. The mine infrared pyroelectric area monitoring circuit topology according to claim 4 is characterized in that: The operation of the circuit topology includes: when the circuit topology is located outside the well, the operation of the long-distance detection unit control circuit: For the long-distance detection unit control circuit: when the outdoor temperature rises, the temperature of the first transistor rises, and the base current of the first transistor increases. The higher the temperature, the greater the current, which causes the entire long-distance detection unit control circuit to be unstable, affecting the detection distance of the long-distance detection unit. The seventh resistor, the ninth resistor and the second diode form a voltage divider bias circuit to provide a DC working voltage for the base of the first transistor. After the second diode is turned on, when the temperature rises, the tube voltage of the first diode will drop. The drop in the tube voltage of the first diode causes the base voltage of the first transistor to drop, thereby reducing the base current of the first transistor, thereby ensuring the stability of the long-distance detection unit control circuit and not being affected by temperature.

6. The mine infrared pyroelectric area monitoring circuit topology according to claim 5 is characterized in that: The operation of the circuit topology also includes the operation of the circuit topology when the circuit topology is located within a well: For the short-distance detection unit control circuit, the photoresistor Rq is very large, much larger than the first resistor, and the first resistor and the photoresistor Rq are divided to ensure that the third transistor is turned on, and the voltage at the lower end of the second resistor is very small, thereby causing the second transistor Q2 to be turned on, and the short-distance detection unit control circuit has an output voltage; when the temperature of the fourth transistor rises, the base current increases, and the higher the temperature, the greater the current, resulting in poor temperature stability of the fourth transistor, which is easy to affect the detection distance of the short-distance detection unit. The voltage-dividing bias circuit composed of the third resistor, the fourth resistor and the first diode, after the first diode is turned on, when the temperature rises, the tube voltage of the first diode will drop, and the drop in the tube voltage of the first diode causes the base voltage of the fourth transistor to drop, so that the base current of the fourth transistor drops, which plays a role in stabilizing the base current of the fourth transistor, so that the short-distance detection unit works stably; For the long-distance detection unit control circuit, when the outdoor temperature rises, the temperature of the first transistor rises, and the base current of the first transistor increases. The higher the temperature, the greater the current, which causes the entire long-distance detection unit control circuit to be unstable, affecting the detection distance of the long-distance detection unit. The seventh resistor, the ninth resistor and the second diode form a voltage divider bias circuit to provide a DC working voltage for the base of the first transistor. After the second diode is turned on, when the temperature rises, the tube voltage of the first diode will drop. The drop in the tube voltage of the first diode causes the base voltage of the first transistor to drop, thereby reducing the base current of the first transistor, thereby ensuring the stability of the long-distance detection unit control circuit and not being affected by temperature.

7. A signal processing method for a mine-used infrared pyroelectric area monitoring circuit topology, based on the mine-used infrared pyroelectric area monitoring circuit topology acquisition signal according to any one of claims 1 to 6, characterized in that: The method comprises: Obtain detection signals of mine infrared pyroelectric area monitoring circuit topology; The ICA algorithm is used to separate the detection signal to obtain the separated signals; Compute a coherence measure of any two signals based on the autospectral density of each signal; The type of signal is determined based on the coherence measurement of all signals, and the type of signal is the number of people close to the mine infrared pyroelectric area monitoring circuit topology.

8. The signal processing method of the mine infrared pyroelectric area monitoring circuit topology according to claim 7 is characterized in that: Coherence measures for any two signals calculated based on the autospectral density of each signal include: Among them, S xx (f) is the autospectral density of the first signal, S ty (f) is the autospectral density of the second signal, S xy (f) is the cross-spectral density of the first signal and the second signal, γ xy (f) is the coherence measure.

9. The signal processing method of the mine infrared pyroelectric area monitoring circuit topology according to claim 8 is characterized in that: The types of signals judged based on the coherence measurement of all signals include: If the coherence measure of the two signals is greater than a threshold, the two signals are considered to be of the same type; if the coherence measure of the two signals is less than the threshold, the two signals are considered to be of two types.

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