CN210130842U

CN210130842U - Infrared detection device

Info

Publication number: CN210130842U
Application number: CN201920535352.5U
Authority: CN
Inventors: 江灏; 张横舟; 陈静; 缪希仁
Original assignee: Fuzhou University
Current assignee: Fuzhou University
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2020-03-10
Anticipated expiration: 2029-04-19

Abstract

The utility model relates to an infrared detection device, including casing (22), its characterized in that, be equipped with main control and survey layer (11), power plane (4) and communication layer (5) three-layer circuit board in casing (22), be equipped with infrared array sensor (1), main control singlechip chip (2) and power chip (3) on main control and the detection layer (11), power module has on power plane (4), communication module has on communication layer (5), is connected through connect interface (6) of plug-in type between the three-layer circuit board. The device is favorable to improving the accuracy of carrying out infrared detection to personnel that exist in the space, and adopts the modularized design, is convenient for assemble and replace.

Description

Infrared detection device

Technical Field

The utility model relates to an infrared detection technology field, concretely relates to infrared detection device.

Background

Along with the continuous development of the technology, the intelligent degree of the building is higher and higher. Links such as intelligent house, lighting control, air conditioner intelligence people, security protection equipment, access control not only need to detect there is the human body, need acquire more detailed information moreover, for example personnel quantity, motion state, physiology situation etc. simultaneously for centralized management, need link together numerous sensor module through a means of low cost, convenient deployment, send information into central control system in a summary. There are several human sensing devices commonly used today. The device adopts a Fresnel lens to converge infrared radiation within a certain angle range to two parallel infrared sensors, and judges whether a person exists according to the difference of radiation quantity. The device has the disadvantages that the absolute temperature of the object and the movement direction of the object cannot be output, the misjudgment of personnel is easily caused, the number of people cannot be identified, the lens volume of the device is large, and the whole device is not easy to miniaturize. The human body sensing device based on machine vision acquires images through a camera and detects whether people exist in a picture through a machine vision technology. The disadvantage is that the device does not have privacy protection capability and cannot be used in areas such as hotel rooms and washrooms. Therefore, the existing indoor personnel sensing device cannot meet the requirement of building intellectualization.

Disclosure of Invention

An object of the utility model is to provide an infrared detection device, the device do benefit to the improvement to have the accuracy that personnel carried out infrared detection in the space, and adopt the modularized design, be convenient for equipment and replacement.

In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides an infrared detection device, includes casing (22), be equipped with main control and survey layer (11), power plane (4) and communication layer (5) three-layer circuit board in casing (22), be equipped with infrared array sensor (1), main control singlechip chip (2) and power chip (3) on main control and the detection layer (11), power module has on power plane (4), communication module has on communication layer (5), is connected through interface (6) of plug-in type between the three-layer circuit board.

Furthermore, a crystal oscillator circuit and a reset circuit are further arranged on the main control and detection layer (11), the infrared array sensor (1) is arranged on the front face of the circuit board, and the main control single chip microcomputer chip (2), the power supply chip (3), the crystal oscillator circuit and the reset circuit are arranged on the back face of the circuit board.

Further, the power supply chip (3) is a 3.3V power supply chip, and supplies power to all chips and elements needing a 3.3V power supply in the infrared node through the connection interface (6).

Furthermore, the power layer (4) provides power for the whole infrared node through the connecting interface (6), and the power chip (3) is also powered by the power layer (4) through the connecting interface (6).

Furthermore, a uniform connection interface (6) is used for defining the three layers of circuit boards, so that the connection and replacement of the circuit boards of the layers are facilitated.

Furthermore, the power layer (4) is a replaceable structure, and the power layer (4) is one of a power layer with a MICRO USB interface, a power layer with a button cell or a power layer with a lithium battery and a charging management chip.

Furthermore, a USB-to-TTL chip is arranged on the power layer with the MICRO USB interface, so that the main control singlechip chip (2) is connected with the computer through a USB.

Further, the communication layer (5) is of a replaceable structure and used for communication between the infrared node and the upper computer, and the communication layer (5) is one of a ZigBee-based communication layer or an RS 485-based communication layer.

Furthermore, a ZigBee radio frequency chip, a ZigBee main control chip, a crystal oscillator circuit and a power supply circuit are arranged on the ZigBee-based communication layer.

Furthermore, an RS 485-to-TTL chip and an RS485 connection interface are arranged on the communication layer based on RS485 so as to be connected with an external RS485 line.

Compared with the prior art, the beneficial effects of the utility model are that: 1. the indoor thermal image can be roughly drawn, and compared with a professional thermal imager, the cost is much lower; 2. different from conventional monitoring, the method does not acquire image pictures, can effectively protect the privacy of indoor personnel, and can be used in occasions such as hotel rooms; 3. the safety protection device can replace the traditional safety protection device, is suitable for various occasions, and can assist safety protection personnel in judging emergency situations; 4. the number and the positions of the personnel in the room can be roughly estimated, and the method can be used for controlling equipment such as illumination and the like, monitoring the personnel density in public places and the like; 5. can survey personnel's body surface temperature and indoor ambient temperature, but air conditioner intelligent regulation indoor temperature in coordination, it is energy-concerving and environment-protective.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is an external view of an embodiment of the present invention.

Fig. 3 is a schematic diagram of the internal structure of the embodiment of the present invention.

Fig. 4 is an interface definition in an embodiment of the invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The utility model provides an infrared detection device, it is through the temperature distribution data in the infrared array sensor collection space to upload the host computer with data through zigBee network or other communication methods. The infrared detection device creatively adopts a small-volume, modularized and laminated design, is divided into three layers, and each layer is connected through a plug-in type connecting terminal.

As shown in fig. 1, 2 and 3, the infrared detection device of the present invention includes a housing (22) having an overall volume not exceeding 40 x 40, and is compact and flexible to use compared with conventional detection devices. Be equipped with main control and survey layer (11), power layer (4) and communication layer (5) three-layer circuit board in casing (22), be equipped with infrared array sensor (1), main control singlechip chip (2) and power chip (3) on main control and the detection layer (11), power module has on power layer (4), communication module has on communication layer (5), is connected through plug-in type connection interface (6) between the three-layer circuit board.

The first layer is a master control and detection layer (11). The main control and detection layer (11) is also provided with a crystal oscillator circuit and a reset circuit, the infrared array sensor (1) is arranged on the front surface of the circuit board, and the main control single chip microcomputer chip (2), the 3.3V power supply chip (3), the crystal oscillator circuit and the reset circuit are arranged on the back surface of the circuit board. The utility model discloses an infrared array sensor (1) be the infrared thermal imaging sensor of low resolution ratio, this infrared thermal imaging sensor of low resolution ratio has following characteristics: the infrared array detection sensing module with high precision level (64 pixel matrix) can realize arrayed relative temperature detection on a detection area, support absolute temperature detection in short distance and realize motion or static state detection on a heat source object. The 3.3V power supply chip (3) supplies power to all chips and elements needing 3.3V power supply in the infrared node through the PIN1 and the PIN5 in the connection interface (6).

In order to facilitate connection and replacement among the circuit boards of the layers, the circuit boards of the three layers are defined by using a uniform connection interface (6). The interface definition of the present embodiment is shown in fig. 4.

The second layer is a power supply layer (4). The power supply layer (4) provides a 5V power supply for the whole infrared node through the connecting interface (6), and the power supply chip (3) is also powered by the power supply layer (4) through the connecting interface (6).

The utility model discloses have various nimble power supply mode, designed power strip (4) of multiform, power strip (4) are for replacing the structure, can be for having the power strip of MICRO USB interface, carrying button cell's power strip or carrying lithium cell and charge one of the power strip of management chip. If a user needs to change the power supply mode, the user only needs to pull out the original power supply layer from the infrared detection device and then insert a new power supply layer.

In order to facilitate later installation and debugging and firmware upgrading of the infrared detection device, a USB-to-TTL chip is arranged on a power layer with a MICRO USB interface, so that the main control single chip microcomputer chip (2) is connected with a computer through a USB.

The third layer is a communication layer (5) used for communication between the infrared node and the upper computer.

The utility model discloses have various nimble communication mode, communication layer (5) can be for one kind in the communication layer based on zigBee or the communication layer based on RS485 for can replacing the structure. And a ZigBee radio frequency chip, a ZigBee main control chip, a crystal oscillator circuit and a power supply circuit are arranged on the ZigBee-based communication layer. And an RS485 to TTL chip and an RS485 connection interface are arranged on the communication layer based on RS485 so as to be connected with an external RS485 line. The utility model discloses the mainly used is zigBee communication, in the great place of electromagnetic interference, can use RS485 communication instead.

Above is the utility model discloses a preferred embodiment, all rely on the utility model discloses the change that technical scheme made, produced functional action does not surpass the utility model discloses during technical scheme's scope, all belong to the utility model discloses a protection scope.

Claims

1. The utility model provides an infrared detection device, includes casing (22), its characterized in that, be equipped with main control and detection layer (11), power layer (4) and communication layer (5) three-layer circuit board in casing (22), be equipped with infrared array sensor (1), main control singlechip chip (2) and power chip (3) on main control and detection layer (11), power module has on power layer (4), communication module has on communication layer (5), is connected through plug-in type interface (6) between the three-layer circuit board.

2. The infrared detection device according to claim 1, wherein the main control and detection layer (11) is further provided with a crystal oscillator circuit and a reset circuit, the infrared array sensor (1) is arranged on the front surface of the circuit board, and the main control single chip (2), the power supply chip (3), the crystal oscillator circuit and the reset circuit are arranged on the back surface of the circuit board.

3. An infrared detection device according to claim 2, characterized in that the power chip (3) is a 3.3V power chip, and supplies power to all chips and elements requiring 3.3V power in the infrared node through the connection interface (6).

4. An infrared detection device according to claim 1, characterized in that the power supply layer (4) supplies power to the whole infrared node through the connection interface (6), and the power supply chip (3) is also supplied with power from the power supply layer (4) through the connection interface (6).

5. An infrared detection device according to claim 1, characterized in that the three layers of circuit boards are defined by a uniform connection interface (6) to facilitate connection and replacement between the layers of circuit boards.

6. The infrared detection device as claimed in claim 1, wherein the power layer (4) is an alternative structure, and the power layer (4) is one of a power layer with a MICRO USB interface, a power layer with a button cell, or a power layer with a lithium battery and a charging management chip.

7. The infrared detector as claimed in claim 6, wherein a USB-to-TTL chip is disposed on the power layer with MICRO USB interface to allow the main control single chip (2) to be connected to the computer via USB.

8. The infrared detection device according to claim 1, wherein the communication layer (5) is a replaceable structure and is used for communication between the infrared node and an upper computer, and the communication layer (5) is one of a ZigBee-based communication layer or an RS 485-based communication layer.

9. The infrared detection device of claim 8, wherein the ZigBee-based communication layer is provided with a ZigBee radio frequency chip, a ZigBee master control chip, a crystal oscillator circuit and a power supply circuit.

10. The infrared detection device as claimed in claim 8, wherein the RS485 based communication layer is provided with an RS485 to TTL chip and an RS485 connection interface for connecting with an external RS485 line.