Infrared sensor

Abstract

The utility model is suitable for the technical field of sensor equipment, and provides an infrared sensor, which comprises a shell used for installing a lens assembly and a main control assembly; the lens assembly comprises a lens and a fixing plate; and the main control assembly comprises an infrared tube and a main control board, and the infrared tube is installed on the main control board and faces the lens. According to the utility model, the lens is arranged to converge the detected and received energy of heat source movement to the infrared tube on the main control assembly through the lens principle; a heat source moving energy signal which is received by the infrared tube and refracted and received by the lens and a signal detected by the ambient light detection unit are sent to the main receiver through radio waves of the radio frequency transceiving unit, so that the installation step of wiring is simplified, and the problem that the received signal is influenced due to length attenuation of a transmission line is solved; the detection result is influenced, and the false alarm rate and the missing report rate are increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensor devices, and particularly relates to an infrared sensor. Background Technique

[0002] The smart home system realizes the interconnection and intelligent management between devices through technologies such as the Internet of Things technology, sensor technology, cloud computing, and artificial intelligence, bringing a convenient, comfortable, and safe living environment for users. With the development of technology, the application of smart homes will be more diversified and personalized to meet the different living needs of users.

[0003] The structural composition of the intelligent home system is the basis for realizing the functions of smart homes. The common intelligent home system mainly consists of the following components: a central control unit, a communication protocol, sensors, actuators, intelligent devices, a security system, etc. Among them, sensors are often used to collect the current environmental brightness information when detecting human movement signals, and decide whether to send an alarm signal according to the current illuminance information, which has a certain security function.

[0004] In the prior art, in most cases, the installation of sensors is very important for ensuring system performance and user experience. Common sensors are usually placed on the desktop or installed on the wall, and are connected to the main receiver through a transmission line. However, due to the influence of space obstacles, a longer transmission line is required to connect the sensor to the main receiver. However, the transmission of its signal will be attenuated due to the length of the transmission line, which affects the received signal, the detection result, and increases its false alarm rate and missed alarm rate. Content of the Utility Model

[0005] The purpose of the embodiment of the utility model is to provide an infrared sensor, aiming to solve the problem that sensors are usually placed on the desktop or installed on the wall, and are connected to the main receiver through a transmission line. However, due to the influence of space obstacles, a longer transmission line is required to connect the sensor to the main receiver. However, the transmission of its signal will be attenuated due to the length of the transmission line, which affects the received signal, the detection result, and increases its false alarm rate and missed alarm rate.

[0006] The embodiment of the utility model is implemented as follows. An infrared sensor, the infrared sensor includes:

[0007] A housing, a cavity structure is formed inside the housing, and the housing is used to install a lens assembly and a main control assembly;

[0008] A lens assembly, the lens assembly includes a lens and a fixing plate. The lens is installed on the housing, and the lens is used to receive infrared light and project the received infrared light onto the infrared tube of the main control assembly after convergence. The fixing plate is installed on the back of the lens, and the fixing plate is used to fix the lens;

[0009] The main control component, which includes an infrared tube and a main control board. The infrared tube is installed on the main control board and faces the lens. The infrared tube is used to receive the infrared light converged by the lens to generate an electrical signal and transmit the generated electrical signal to the main control board. The main control board is provided with an ambient light detection unit and a radio frequency transceiver unit. The main control board is used to transmit the signal generated by the infrared tube and the signal of the ambient light detection unit to the main receiver through the radio frequency transceiver unit.

[0010] Preferably, the housing includes a front shell and a bottom shell. The front shell is an irregular semi-closed housing. An installation area is provided at the center of the front shell for the lens. A plurality of installation bumps are provided on the back of the front shell, and the installation bumps are used to connect with the bottom shell.

[0011] Preferably, the bottom shell is an irregular semi-closed housing. A plurality of positioning bumps and a plurality of installation grooves are provided on the inner side of the bottom shell. The positioning bumps are used to position the main control component, and the installation grooves cooperate with the installation bumps on the front shell so that the front shell and the bottom shell are connected.

[0012] Preferably, the housing further includes foot pads. The foot pads are irregular plate-shaped and are installed on the outer side of the bottom shell. The foot pads are used to fix the infrared sensor so that the infrared sensor can be installed on the desktop.

[0013] Preferably, the lens is a concave hemispherical structure. The convex side of the lens is installed on the installation area of the front shell, and the bottom surface of the lens is installed on the fixing plate.

[0014] Preferably, the fixing plate is a circular plate. The fixing plate is provided with an annular positioning groove for positioning the position of the lens. A central hole is provided at the center of the fixing plate, and the central hole is used to transmit the heat source energy signal received by the lens through the central hole to the main control board.

[0015] Preferably, the infrared tube is installed at the center of the main control board and is in the same straight line direction as the lens and the central hole on the fixing plate so that the heat source energy received by the lens can enter the infrared tube. The infrared tube is electrically connected to the radio frequency transceiver unit on the main control board.

[0016] Preferably, the main control board is further provided with a signal lamp unit, a switch button unit and a converter unit. The signal lamp unit, the switch button unit, the converter unit and the ambient light detection unit are respectively electrically connected to the radio frequency transceiver unit.

[0017] An infrared sensor provided by an embodiment of the present utility model. The present utility model is provided with a housing, and a lens assembly and a main control assembly are installed in the internal cavity structure of the housing. In the lens assembly, the lens is fixed to the housing through a fixing plate so that the lens does not move during use, ensuring its detection effect. The lens detects and receives infrared light, converges the received infrared light, and projects it onto the infrared tube of the main control assembly. The main control assembly is provided with an infrared tube and a main control board. An ambient light detection unit and a radio frequency transceiver unit are arranged on the main control board. The infrared light converged by the lens received by the infrared tube generates an electrical signal, and the generated electrical signal is transmitted to the main control board. The electrical signal detected by the ambient light detection unit is sent to the main receiver through the radio wave of the radio frequency transceiver unit, simplifying the installation steps of wiring, solving the problem that the received signal is affected by the attenuation of the transmission line length, affecting the detection result, and increasing its false alarm rate and missed alarm rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an exploded structural schematic diagram of an infrared sensor provided by an embodiment of the present utility model;

[0019] Figure 2 is an internal structural schematic diagram of the main control board of an infrared sensor provided by an embodiment of the present utility model.

[0020] In the drawings: 1, front shell; 2, bottom shell; 3, lens assembly; 31, lens; 32, fixing plate; 4, main control assembly; 41, infrared tube; 42, main control board; 43, ambient light detection unit; 44, power switch unit; 45, signal lamp unit; 46, radio frequency transceiver unit; 5, foot pad. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0022] The following describes the specific implementation of the present utility model in detail with reference to specific embodiments.

[0023] As Figure 1-2 shown, it is a structural diagram of an infrared sensor provided by an embodiment of the present utility model, including: a housing, an internal cavity structure is formed in the housing, and the housing is used to install the lens assembly 3 and the main control assembly 4;

[0024] The lens assembly 3, the lens assembly 3 includes a lens 31 and a fixing plate 32. The lens 31 is installed on the housing. The lens 31 is used to receive infrared light and project the received and converged infrared light onto the infrared tube 41 of the main control assembly 4. The fixing plate 32 is installed on the back of the lens 31, and the fixing plate 32 is used to fix the lens 31;

[0025] The main control assembly 4, the main control assembly 4 includes an infrared tube 41 and a main control board 42. The infrared tube 41 is installed on the main control board 42 and faces the lens 31. The infrared tube 41 is used to receive the infrared light converged by the lens 31 to generate an electrical signal and transmit the generated electrical signal to the main control board 42. An ambient light detection unit 43 and a radio frequency transceiver unit 46 are provided on the main control board 42. The main control board 42 is used to transmit the signal generated by the infrared tube 41 and the signal of the ambient light detection unit 43 to the main receiver through the radio frequency transceiver unit 46.

[0026] In the embodiment of the present utility model, preferably, the infrared sensor can be applied to various environmental occasions to detect whether there are strange people and judge whether an alarm signal needs to be sent according to the current environmental state, and has a security function. The infrared sensor mainly consists of a housing, a lens assembly 3 and a main control assembly 4. The lens assembly 3 and the main control assembly 4 are installed in the internal cavity structure of the housing. In the lens assembly 3, the lens 31 is installed on the housing through the fixing plate 32. The main control assembly 4 is installed on one side of the lens assembly 3, and the infrared tube 41 installed on the main control board 42 is close to the fixing plate 32 and faces the lens 31 so that the energy signal of the moving heat source refracted on the lens 31 can be converged onto the infrared tube 41 to generate an electrical signal. The energy signal of the moving heat source can be the energy signal when a person moves within the detection range. According to the ambient light detection unit 43 on the main control board 42, the signal of the light condition of the current environmental occasion is detected and transmitted to the main receiver together with the electrical signal of the energy of the person's movement detected by the infrared tube 41 through the radio frequency transceiver unit 46. The detected signal is transmitted to the main receiver through wireless transmission technology to prevent the signal attenuation caused by long wiring from affecting the efficiency and effect of the alarm signal output.

[0027] In an example of the present utility model, the present utility model is provided with a housing, and a lens assembly 3 and a main control assembly 4 are installed in the inner cavity structure of the housing. In the lens assembly 3, the lens 31 is fixed to the housing through a fixing plate 32 so that the lens 31 does not move during use, ensuring its detection effect. The lens 31 detects and receives infrared light, and after converging the received infrared light, projects it onto the infrared tube 41 of the main control assembly 4. The main control assembly 4 is provided with an infrared tube 41 and a main control board 42. An ambient light detection unit 43 and a radio frequency transceiver unit 46 are provided on the main control board 42. The infrared tube 41 receives the infrared light converged by the lens 31 to generate an electrical signal, and the generated electrical signal is transmitted to the main control board 42. The electrical signal detected by the ambient light detection unit 43 is sent to the main receiver through the radio wave of the radio frequency transceiver unit 46, simplifying the installation steps of wiring, solving the problem that the received signal is affected by the attenuation of the transmission line length, affecting the detection result, increasing its false alarm rate and missed alarm rate.

[0028] As Figure 1-2 shown, as a preferred embodiment of the present utility model, the housing includes a front shell 1 and a bottom shell 2. The front shell 1 is an irregular semi-closed shell. An installation area is provided at the center of the front shell 1 for the lens 31. A plurality of installation bumps are provided on the back of the front shell 1 for connecting with the bottom shell 2.

[0029] In an embodiment of the present utility model, preferably, the bottom shell 2 in the housing can be a cylindrical shell with a certain depth, the front shell 1 can be a plate-like structure with a certain thickness, the installation area of the front shell 1 can be a through hole with a diameter smaller than the outer diameter of the lens 31. A plurality of rectangular plate-like installation bumps are provided on the back of the front shell 1. A bending structure can be provided at the end of the installation bump for easy connection with the bottom shell 2. A ring-shaped positioning structure can be provided on the back of the front shell 1 for positioning the lens 31 so that the lens 31 is stably installed to ensure the detection effect.

[0030] As Figure 1-2 shown, as a preferred embodiment of the present utility model, the bottom shell 2 is an irregular semi-closed shell. A plurality of positioning bumps and a plurality of installation grooves are provided on the inner side surface of the bottom shell 2. The positioning bumps are used for positioning the main control assembly 4, and the installation grooves cooperate with the installation bumps on the front shell 1 so that the front shell 1 and the bottom shell 2 are connected.

[0031] In an embodiment of the present utility model, preferably, a plurality of installation grooves are provided on the inner wall surface of the cylindrical bottom shell 2 to cooperate with the installation bumps with bending structures on the front shell 1 so that the front shell 1 and the bottom shell 2 are completely installed. The positioning bumps are mainly used to stably fix the main control board 42 of the main control assembly 4, and together with the front shell 1 being installed in place, protect the lens assembly 3 and the main control assembly 4.

[0032] As Figure 1-2As shown, as a preferred embodiment of the present utility model, the outer shell further includes a foot pad 5. The foot pad 5 is in the shape of an irregular plate and is installed on the outer side surface of the bottom shell 2. The foot pad 5 is used to fix the infrared sensor so that the infrared sensor can be installed on the desktop.

[0033] In an embodiment of the present utility model, preferably, an irregular plate-shaped foot pad 5 can be provided on the outer side surface of the cylindrical outer shell to facilitate placing the infrared sensor on the desktop or fixing it on the wall or ceiling. Moreover, the plate-shaped foot pad 5 can stabilize the lens assembly 3 and the main control assembly 4 inside the infrared sensor and has a supporting effect.

[0034] As Figure 1-2 shown, as a preferred embodiment of the present utility model, the lens 31 is a concave hemispherical structure. The convex side of the lens 31 is installed on the installation area of the front shell 1, and the bottom surface of the lens 31 is installed on the fixing plate 32.

[0035] In an embodiment of the present utility model, preferably, the shape of the lens 31 is a concave hemispherical structure and a ring-shaped convex block is provided on its back surface to facilitate installation on the back surface of the front shell 1. The convex side of the lens 31 passes through the installation area of the front shell 1 for complete positioning. The back surface of the lens 31 is fixed to the back surface of the front shell 1 through the fixing plate 32 so that the lens 31 is fixed in place without movement, ensuring the detection effect of the infrared sensor.

[0036] As Figure 1-2 shown, as a preferred embodiment of the present utility model, the fixing plate 32 is in the shape of a circular plate. The fixing plate 32 is provided with a ring-shaped positioning groove. The positioning groove is used to position the position of the lens 31. A central hole is provided at the center position of the fixing plate 32. The central hole is used to transmit the heat source energy signal received by the lens 31 into the main control board 42 through the central hole.

[0037] In an embodiment of the present utility model, preferably, the shape of the fixing plate 32 can be similar to the shape of the back surface of the lens 31. The ring-shaped positioning groove provided on the fixing plate 32 can cooperate with the ring-shaped convex block on the back surface of the lens 31 to enable complete installation of the lens 31 and the fixing plate 32. The central hole provided at the center position of the fixing plate 32 facilitates the lens 31 to move the focused heat source energy through coupled light so that it enters the infrared tube 41, enabling the infrared tube 41 sensor to detect that there is a heat source moving, which can be understood as detecting that there is a person moving.

[0038] As Figure 1-2As shown, as a preferred embodiment of the present utility model, the infrared tube 41 is installed at the center position of the main control board 42 and is in the same straight line direction as the central holes on the lens 31 and the fixing plate 32 so that the heat source energy received by the lens 31 can enter the infrared tube 41, and the infrared tube 41 is electrically connected to the radio frequency transceiver unit 46 on the main control board 42.

[0039] In the embodiment of the present utility model, preferably, the infrared tube 41 receives the heat source energy signal refracted by the lens 31, and the main control board 42 detects that there is a person moving within the detection range at this time. The installation position of the infrared tube 41 is set in the same straight line direction as the lens 31 and the central holes on the fixing plate 32. The infrared tube 41 is electrically connected and installed on the main control board 42 and is electrically connected to the radio frequency transceiver unit 46 on the main control board 42 to facilitate the transmission of the signal to the main receiver.

[0040] As Figure 1-2 shown, as a preferred embodiment of the present utility model, the main control board 42 is further provided with a signal lamp unit 45, a switch button unit, and a converter unit. The signal lamp unit 45, the switch button unit, the converter unit, and the ambient light detection unit 43 are respectively electrically connected to the radio frequency transceiver unit 46.

[0041] In the embodiment of the present utility model, preferably, the main control board 42 is further provided with a signal lamp unit 45, a switch button unit, and a converter unit at the same time. The infrared tube 41 receives the energy signal of the moving heat source refracted by the lens 31, that is, it detects the movement of a person. At this time, the situation of the ambient light detected by the ambient light detection unit 43 and this signal are transmitted to the main receiver together with the signal detected by the infrared tube 41 by the radio frequency transceiver unit 46 through wireless transmission technology. If the ambient light detection unit 43 detects that there is still a person moving in a dim environment, the alarm signal can be output through the signal lamp unit 45 to make the signal lamp light up for warning. If the ambient light detection unit 43 detects that there is a person moving in a bright environment, it is normal at this time and no signal is output from the signal lamp unit 45, so the signal lamp will not light up. The switch button unit is used to control the on or off of the infrared sensor detection. The ambient light detection unit 43 mainly detects the illumination intensity of the surrounding environment and can be an element that converts the optical signal into an electrical signal. The radio frequency transceiver unit 46 can be an electronic device for transmitting and receiving radio frequency signals in a radio communication system. The radio frequency transceiver signal is transmitted through a wireless signal and the signal is subjected to analog-to-digital conversion, and then the frequency and phase of the data are analyzed.

[0042] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An infrared sensor, characterized in that: The infrared sensor comprises: A housing, wherein a cavity structure is formed inside the housing, and the housing is used to install a lens assembly and a main control assembly; A lens assembly, the lens assembly includes a lens and a fixing plate, the lens is mounted on the housing, the lens is used to receive infrared light and converge the received infrared light and project it onto the infrared tube of the main control assembly, the fixing plate is mounted on the back of the lens, and the fixing plate is used to fix the lens; The main control component includes an infrared tube and a main control board. The infrared tube is installed on the main control board and faces the lens. The infrared tube is used to receive the infrared light focused by the lens to generate an electrical signal and transmit the generated electrical signal to the main control board. An ambient light detection unit and a radio frequency transceiver unit are arranged on the main control board. The main control board is used to transmit the signal generated by the infrared tube and the signal of the ambient light detection unit to the main receiver through the radio frequency transceiver unit.

2. The infrared sensor according to claim 1, characterized in that: The shell includes a front shell and a bottom shell. The front shell is an irregular semi-enclosed shell. A mounting area is arranged at the center of the front shell. The mounting area is used for the lens. A plurality of mounting protrusions are arranged on the back of the front shell. The mounting protrusions are used to connect with the bottom shell.

3. The infrared sensor according to claim 2, characterized in that: The bottom shell is an irregular semi-enclosed shell, and a plurality of positioning protrusions and a plurality of mounting grooves are arranged on the inner side of the bottom shell. The positioning protrusions are used to position the main control components, and the mounting grooves cooperate with the mounting protrusions on the face shell to connect the face shell and the bottom shell.

4. The infrared sensor according to claim 2, characterized in that: The housing further comprises a foot pad, which is in an irregular plate shape and is mounted on the outer side of the bottom housing. The foot pad is used to fix the infrared sensor so that the infrared sensor can be mounted on the desktop.

5. The infrared sensor according to claim 2, characterized in that: The lens is a concave hemispherical structure, the convex side of the lens is mounted on the mounting area of ​​the face shell, and the bottom surface of the lens is mounted on the fixing plate.

6. The infrared sensor according to claim 5, characterized in that: The fixing plate is a circular plate, and is provided with an annular positioning groove, and the positioning groove is used to locate the position of the lens. A center hole is provided at the center position of the fixing plate, and the center hole is used to send the heat source energy signal received by the lens to the main control board through the center hole.

7. The infrared sensor according to claim 6, characterized in that: The infrared tube is installed at the center of the main control board and is located in the same straight line direction as the lens and the center hole of the fixing plate so that the heat source energy received by the lens can enter the infrared tube. The infrared tube is electrically connected to the radio frequency transceiver unit on the main control board.

8. The infrared sensor according to claim 1, characterized in that: The main control board is also provided with a signal light unit, a switch button unit and a converter unit, and the signal light unit, the switch button unit, the converter unit and the ambient light detection unit are electrically connected to the radio frequency transceiver unit respectively.

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