Human body approach detection device
The combination of the PIR infrared pyroelectric sensor module and the BLE Bluetooth controller solves the problems of large size, low sensitivity and high power consumption of existing sensors, realizes high-precision, low-cost and long standby time human proximity detection, and expands application scenarios.
Patent Information
- Application Number
- CN202423000057.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-12-06
AI Technical Summary
Existing human proximity sensors have the problems of large size, low response sensitivity, complex structure, high cost and high power consumption, which limit their application scope.
The combination of PIR infrared pyroelectric sensor module and BLE Bluetooth controller improves detection accuracy and response speed through infrared signal acquisition and Bluetooth signal processing, simplifies hardware structure, and reduces cost and power consumption.
It significantly improves detection accuracy and response speed, reduces device size, reduces hardware costs and energy consumption, extends standby time, and broadens application scenarios.
Smart Images
Figure CN223436123U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to a monitoring device, in particular to a human body proximity detection device suitable for various industrial and living scenes, and belongs to the technical field of environment state monitoring. BACKGROUND
[0002] The human body proximity sensor is a device integrating modern sensor technology and intelligent algorithms, which is mainly used for automatically monitoring and identifying whether there is human activity within a certain range. At present, such sensors are mainly used in the following scenarios:
[0003] Safety protection, that is, in industrial production lines and warehouse environments, human body proximity sensors can be used in automatic access control systems and safety fences to monitor unauthorized personnel entering dangerous or restricted areas to improve the safety of the working environment.
[0004] Automatic control, that is, on an automated assembly line, human body proximity sensors can detect the position of workers to automatically start or stop equipment operation, avoid misoperation and safety accidents, and improve production efficiency.
[0005] Environmental monitoring, that is, in industrial clean rooms, laboratories and other scenes that require strict environmental control, human body proximity sensors can be used to monitor personnel access to ensure the stability and cleanliness of the environment.
[0006] Device maintenance warning, that is, based on the sensing principle of human body proximity sensors, install them around key mechanical equipment to monitor the heat generated during equipment operation, detect abnormal conditions such as overheating as soon as possible, and prevent equipment failure and unscheduled downtime.
[0007] Although existing human body proximity sensors are widely used in various applications, they also have significant drawbacks, such as large overall size, causing difficulties in actual installation and application; low reaction sensitivity, prone to misjudgment; complex structure, not only high production cost, but also high overall power consumption and short standby time.
[0008] Therefore, how to propose a new human body proximity detection device to overcome and optimize the many shortcomings in the prior art and further expand the application range of this type of detection device has become a problem that technicians in the field need to solve. SUMMARY
[0009] In order to overcome and optimize the many shortcomings of existing human body proximity sensors and further expand the application range of this type of detection device, the application provides a human body proximity detection device suitable for various industrial and living scenes.
[0010] The human body proximity detection device provided by the application adopts the following technical scheme:
[0011] The human body proximity detection device comprises a PIR infrared pyroelectric sensing module for detecting and receiving infrared signals in an external environment and converting them into electrical signal outputs, a BLE Bluetooth controller for generating signal processing instructions and realizing Bluetooth signal transceiving with external communication equipment, and a switching value output module for responding to the signal processing instructions and completing switching value signal outputs, the signal output end of the PIR infrared pyroelectric sensing module is electrically connected to the signal input end of the BLE Bluetooth controller, the signal output end of the BLE Bluetooth controller is electrically connected to the signal input end of the switching value output module, and the signal output end of the switching value output module is electrically connected to the signal input end of an external action execution mechanism.
[0012] By adopting the above technical scheme, the PIR infrared pyroelectric sensing module is used to collect infrared signals emitted when a human body approaches, and the BLE Bluetooth controller is used for rapid processing and feedback of the signals, thereby significantly improving the detection accuracy and response speed. Meanwhile, the entire device structure is simple and the connection relationship is clear, which not only greatly reduces the size of the hardware part, avoids difficulties in actual installation and application, but also reduces the hardware cost and energy consumption, prolongs the standby time of the device as a whole, and greatly improves the application effect and market competitiveness of the human body proximity detection device.
[0013] Preferably, the device further comprises a power module for supplying power to each part of the device, the first output end of the power module is electrically connected to the power input end of the BLE Bluetooth controller and the first power input end of the switching value output module, respectively, and the second output end of the power module is electrically connected to the power input end of the PIR infrared pyroelectric sensing module and the second power input end of the switching value output module, respectively.
[0014] Preferably, the device further comprises a voltage conversion module for converting high-voltage input from the second output end of the power module into low-voltage output, the input end of the voltage conversion module is electrically connected to the second output end of the power module, and the output end of the voltage conversion module is electrically connected to the power input end of the PIR infrared pyroelectric sensing module and the second power input end of the switching value output module, respectively.
[0015] Preferably, the power module is a 3V power supply, and the voltage conversion module is a 3V to 1.8V voltage conversion module.
[0016] By adopting the technical scheme, the specific arrangement and connection relationship of the power module and the voltage conversion module are defined, which mainly functions to ensure the long-time stable operation of the main components in the device, i.e., the PIR infrared pyroelectric sensing module, the BLE Bluetooth controller and the switching value output module, and such arrangement gives priority to the operation efficiency and the endurance time of the device as a whole, and ensures the stability and consistency of the monitoring process as much as possible.
[0017] Preferably, the PIR infrared pyroelectric sensing module is provided with an infrared sensing sensor chip, a signal input end of the infrared sensing sensor chip is electrically connected with a first resistor as a signal input end of the PIR infrared pyroelectric sensing module, and a signal output end of the infrared sensing sensor chip is electrically connected with a second resistor as a signal output end of the PIR infrared pyroelectric sensing module.
[0018] Preferably, a VDD end of the infrared sensing sensor chip is electrically connected with an output end of the voltage conversion module through an isolation magnetic bead as a power input end of the PIR infrared pyroelectric sensing module, one end of the isolation magnetic bead is electrically connected with one end of a first capacitor, the other end of the isolation magnetic bead is electrically connected with one end of a second capacitor, the other ends of the first capacitor and the second capacitor are both electrically connected to a digital ground, and a VSS end of the infrared sensing sensor chip is electrically connected to the digital ground through a third resistor.
[0019] By adopting the technical scheme, the specific arrangement and connection relationship of the PIR infrared pyroelectric sensing module are defined, which simplifies the hardware structure and reduces the hardware and application cost on the premise of ensuring that the infrared sensing sensor chip can fully play the sensing function, and greatly expands the applicability of the scheme and widens the application scenarios.
[0020] Preferably, the switching value output module is provided with a latch, a first port and a third port of the latch are electrically connected to a digital ground through a fourth resistor and a fifth resistor respectively as signal input ends of the switching value output module, a second port and a sixth port of the latch are directly electrically connected to the digital ground, a fourth port of the latch is electrically connected to a gate of an NMOS tube through a sixth resistor, and a fifth port of the latch is electrically connected to an output end of the voltage conversion module as a second power input end of the switching value output module and is electrically connected to the digital ground through a third capacitor.
[0021] Preferably, a solid state relay is further arranged in the switch output module, a first port of the solid state relay is used as a first power input end of the switch output module and is electrically connected to the first output end of the power module through a seventh resistor, a second port of the solid state relay is electrically connected to the drain of the NMOS tube, a source of the NMOS tube is electrically connected to a digital ground, a seventh port and an eighth port of the solid state relay are electrically connected to a switch output interface, and the switch output interface is electrically connected to the external action execution mechanism as a signal output end of the switch output module.
[0022] By adopting the above technical scheme, the specific arrangement and connection relationship of the internal functional components of the switch output module are determined, the electrical interaction between the latch and the solid state relay is utilized, and the two functions of responding to a signal processing instruction and completing switch signal output of the switch output module are embodied from the hardware level. In addition, the cooperation with the external action execution mechanism also helps to improve the overall adaptability of the scheme, greatly widening the application scenarios.
[0023] Preferably, an interactive component for realizing human-computer interaction and a download port component for realizing data interaction are further included, both of which are electrically connected to the BLE Bluetooth controller and complete signal interaction, and the power interfaces of both the interactive component and the download port component are electrically connected to the first output end of the power module and are powered by the first output end of the power module.
[0024] Preferably, the interactive component is any one or a combination of multiple of a switch, a touchpad, an LED lamp, and a buzzer.
[0025] By adopting the above technical scheme, the functions of the human body proximity detection device are further enriched, the interaction performance is enhanced, and a premise and foundation are provided for subsequent application and setting of the scheme in multiple scenarios.
[0026] In summary, the present application at least includes the following beneficial effects:
[0027] The present application greatly simplifies the hardware structure of the device as a whole while ensuring the human body proximity detection efficiency and sensitivity, not only reduces the overall size of the device, brings convenience for subsequent installation and application, but also significantly reduces the hardware cost and operating power consumption of the device.
[0028] In addition, the reasonable use of the PIR infrared pyroelectric sensing module in the present application retains many advantages of the infrared pyroelectric sensing technology in the use process, such as high precision, high sensitivity, fast response, long service life, stable performance, etc., which provides a premise and foundation for subsequent application and setting of the scheme in multiple scenarios. BRIEF DESCRIPTION OF DRAWINGS
[0029] Figure 1 is a connection relationship diagram of a human body proximity detection device in an embodiment of the present application;
[0030] Figure 2 is a connection circuit schematic diagram of a PIR infrared pyroelectric sensing module in an embodiment of the present application;
[0031] Figure 3 is a connection circuit schematic diagram of a switch output module in an embodiment of the present application;
[0032] Wherein: 1, infrared induction sensor chip; 2, first resistor; 3, second resistor; 4, first capacitor; 5, second capacitor; 6, isolation magnetic bead; 7, third resistor; 8, latch; 9, fourth resistor; 10, fifth resistor; 11, sixth resistor; 12, NMOS tube; 13, third capacitor; 14, solid state relay; 15, seventh resistor; 16, switch output interface. DETAILED DESCRIPTION
[0033] The present application provides a human body proximity detection device suitable for various industrial and living scenes. In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail below.
[0034] A specific embodiment of the present application will be further described in detail below in combination with the drawings of the specification.
[0035] A human body proximity detection device, as shown in Figure 1 includes a PIR (Passive Infrared) infrared pyroelectric sensing module for detecting and receiving infrared signals in the external environment and converting them into electrical signal output, a BLE Bluetooth controller for generating signal processing instructions and realizing Bluetooth signal transceiving with external communication equipment, and a switch output module for responding to signal processing instructions and completing switch signal output.
[0036] Since the human body has a constant body temperature, it will emit infrared rays of a specific wavelength. The PIR infrared pyroelectric sensing module in the present scheme can detect the infrared signals emitted by the human body and convert them into electrical signal output to the BLE Bluetooth controller under its running state. The BLE Bluetooth controller processes the data, and when the preset discrimination condition is met, the BLE Bluetooth controller generates a signal processing instruction to control the switch output module to execute a response.
[0037] In this embodiment, the signal output end of the PIR infrared pyroelectric sensor module is electrically connected to the signal input end of the BLE Bluetooth controller, the signal output end of the BLE Bluetooth controller is electrically connected to the signal input end of the switch output module, and the signal output end of the switch output module is electrically connected to the signal input end of the external action actuator.
[0038] In addition, the human proximity detection device also includes a power supply module for powering various parts of the device, the first output end of the power supply module is electrically connected to the power input end of the BLE Bluetooth controller and the first power input end of the switching output module, and the second output end of the power supply module is electrically connected to the power input end of the PIR infrared pyroelectric sensor module and the second power input end of the switching output module.
[0039] In addition, the human proximity detection device also includes a voltage conversion module for converting the high voltage input from the second output end of the power module into a low voltage output. The input end of the voltage conversion module is electrically connected to the second output end of the power module, and the output end of the voltage conversion module is electrically connected to the power input end of the PIR infrared pyroelectric sensor module and the second power input end of the switching output module, respectively.
[0040] For the present embodiment only, the power supply module in the present embodiment is a 3V power supply, and the voltage conversion module is a 3V to 1.8V voltage conversion module.
[0041] like Figure 2 As shown, the PIR infrared pyroelectric sensor module is provided with an infrared sensing sensor chip 1, the signal input end of the infrared sensing sensor chip 1 serves as the signal input end of the PIR infrared pyroelectric sensor module and is electrically connected to a first resistor 2, and the signal output end of the infrared sensing sensor chip 1 serves as the signal output end of the PIR infrared pyroelectric sensor module and is electrically connected to a second resistor 3.
[0042] The VDD terminal of the infrared sensing sensor chip 1 serves as the power input terminal of the PIR infrared pyroelectric sensor module and is electrically connected to the output terminal of the voltage conversion module through an isolation magnetic bead 6. One end of the isolation magnetic bead 6 is electrically connected to one end of the first capacitor 4, and the other end of the isolation magnetic bead 6 is electrically connected to one end of the second capacitor 5. The other ends of the first capacitor 4 and the second capacitor 5 are both electrically connected to the digital ground. The VSS terminal of the infrared sensing sensor chip 1 is electrically connected to the digital ground through a third resistor 7.
[0043] Here, the first resistor 2, the second resistor 3, and the third resistor 7 all function as current limiters to protect the device. The isolation bead 6 primarily isolates and filters the power supply. The first capacitor 4 and the second capacitor 5 act as filter capacitors for the input power supply, ensuring overall circuit power stability. The infrared sensor chip 1 is the core of the entire PIR pyroelectric sensor module and, ultimately, the entire human proximity detection device. It integrates the sensor element with a signal processing chip. The infrared signal radiated by the human body is converted to a digital signal via a 14-bit ADC and then output via a logic circuit or digital interface circuit.
[0044] like Figure 3 As shown, the switching output module is provided with a latch 8. For this embodiment only, the latch 8 is a D-type latch. The first port (LE end) and the third port (D end) of the latch 8 serve as the signal input end of the switching output module. The first port of the latch 8 is electrically connected to the digital ground through the fourth resistor 9, and the third port of the latch 8 is electrically connected to the digital ground through the fifth resistor 10. The second port (GND end) and the sixth port (OE end) of the latch 8 are directly electrically connected to the digital ground. The fourth port (Q end) of the latch 8 is electrically connected to the gate of the NMOS tube 12 through the sixth resistor 11. The fifth port (VCC end) of the latch 8 serves as the second power input end of the switching output module and is electrically connected to the output end of the voltage conversion module and is electrically connected to the digital ground through the third capacitor 13.
[0045] The switching output module is also provided with a solid-state relay 14. The first port of the solid-state relay 14 serves as the first power input terminal of the switching output module and is electrically connected to the first output terminal of the power module via a seventh resistor 15. The second port of the solid-state relay 14 is electrically connected to the drain of the NMOS transistor 12, and the source of the NMOS transistor 12 is electrically connected to a digital ground. The seventh and eighth ports of the solid-state relay 14 are electrically connected to a switching output interface 16. The switching output interface 16 serves as the signal output terminal of the switching output module and is electrically connected to the external action actuator. The third through sixth ports of the solid-state relay 14 are not connected.
[0046] When the first port of the latch 8 is given high level, the third port is given low level, the fourth port foot outputs low level, at this time the NMOS tube 12 is not turned on, the solid state relay 14 is not turned on, and the external action execution mechanism is in the off state; when the first port of the latch 8 is given high level, the third port is given high level, the fourth port foot outputs high level, at this time the NMOS tube 12 is turned on, the solid state relay 14 is turned on, and the external action execution mechanism is connected.
[0047] In addition, the human body proximity detection device further comprises an interaction component for realizing human-computer interaction and a download port component for realizing data interaction, both of which are electrically connected with the BLE Bluetooth controller and complete signal interaction, and the power supply interfaces of both the interaction component and the download port component are electrically connected with the first output end of the power supply module and are powered by the same.
[0048] The download port component can be a combination of ports of various quantities and specifications. The interaction component is a combination of any one or more of a switch, a touchpad, an LED lamp, and a buzzer. For this embodiment only, the interaction component comprises a switch for controlling the opening and closing of the entire device and an LED lamp for feeding back the running state of the entire device.
[0049] It should be finally understood that "a plurality of" referred to herein means two or more than two. "And / or", which describes the association relationship of associated objects, means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents that the associated objects before and after it are in an "or" relationship.
[0050] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.
Claims
1. A human proximity detection device, characterized in that: It includes a PIR infrared pyroelectric sensor module for detecting and receiving infrared signals in the external environment and converting them into electrical signals for output, a BLE Bluetooth controller for generating signal processing instructions and realizing Bluetooth signal reception and transmission with external communication equipment, and a switch output module for responding to signal processing instructions and completing switch signal output. The signal output end of the PIR infrared pyroelectric sensor module is electrically connected to the signal input end of the BLE Bluetooth controller, the signal output end of the BLE Bluetooth controller is electrically connected to the signal input end of the switch output module, and the signal output end of the switch output module is electrically connected to the signal input end of the external action execution mechanism.
2. The human proximity detection device according to claim 1, wherein: It also includes a power supply module for powering various parts of the device, the first output end of the power supply module is electrically connected to the power input end of the BLE Bluetooth controller and the first power input end of the switching output module, and the second output end of the power supply module is electrically connected to the power input end of the PIR infrared pyroelectric sensor module and the second power input end of the switching output module.
3. The human proximity detection device according to claim 2, wherein: It also includes a voltage conversion module for converting a high voltage input from the second output end of the power module into a low voltage output, the input end of the voltage conversion module is electrically connected to the second output end of the power module, and the output end of the voltage conversion module is electrically connected to the power input end of the PIR infrared pyroelectric sensor module and the second power input end of the switching output module.
4. The human proximity detection device according to claim 3, wherein: The power supply module is a 3V power supply, and the voltage conversion module is a 3V to 1.8V voltage conversion module.
5. The human proximity detection device according to claim 3, wherein: The PIR infrared pyroelectric sensor module is provided with an infrared sensor chip (1); a signal input end of the infrared sensor chip (1) serves as a signal input end of the PIR infrared pyroelectric sensor module and is electrically connected to a first resistor (2); and a signal output end of the infrared sensor chip (1) serves as a signal output end of the PIR infrared pyroelectric sensor module and is electrically connected to a second resistor (3).
6. The human proximity detection device according to claim 5, characterized in that: The VDD end of the infrared sensor chip (1) serves as the power input end of the PIR infrared pyroelectric sensor module and is electrically connected to the output end of the voltage conversion module through an isolation magnetic bead (6); one end of the isolation magnetic bead (6) is electrically connected to one end of the first capacitor (4); the other end of the isolation magnetic bead (6) is electrically connected to one end of the second capacitor (5); the other ends of both the first capacitor (4) and the second capacitor (5) are electrically connected to a digital ground; and the VSS end of the infrared sensor chip (1) is electrically connected to the digital ground through a third resistor (7).
7. The human proximity detection device according to claim 3, wherein: The switch output module is provided with a latch (8), the first port and the third port of the latch (8) serve as signal input terminals of the switch output module, the first port of the latch (8) is electrically connected to the digital ground through a fourth resistor (9), the third port of the latch (8) is electrically connected to the digital ground through a fifth resistor (10), the second port and the sixth port of the latch (8) are directly electrically connected to the digital ground, the fourth port of the latch (8) is electrically connected to the gate of the NMOS tube (12) through a sixth resistor (11), and the fifth port of the latch (8) serves as the second power input terminal of the switch output module and is electrically connected to the output terminal of the voltage conversion module and is electrically connected to the digital ground through a third capacitor (13).
8. The human proximity detection device according to claim 7, wherein: The switch output module is further provided with a solid-state relay (14), a first port of the solid-state relay (14) serving as a first power input terminal of the switch output module and being electrically connected to a first output terminal of the power module via a seventh resistor (15), a second port of the solid-state relay (14) being electrically connected to a drain of the NMOS transistor (12), a source of the NMOS transistor (12) being electrically connected to a digital ground, a seventh port and an eighth port of the solid-state relay (14) being electrically connected to a switch output interface (16), and the switch output interface (16) serving as a signal output terminal of the switch output module being electrically connected to the external action execution mechanism.
9. The human proximity detection device according to claim 2, wherein: It also includes an interactive component for realizing human-computer interaction and a download port component for realizing data interaction. Both the interactive component and the download port component are electrically connected to the BLE Bluetooth controller and complete signal interaction. The power interfaces of both the interactive component and the download port component are electrically connected to the first output end of the power module and are powered thereby.
10. The human proximity detection device according to claim 9, characterized in that: The interactive component is any one or more combinations of a switch, a touch panel, an LED light, and a buzzer.