CN219495470U - Human body presence sensor for preventing pet interference - Google Patents

Abstract

The utility model provides a human body existence sensor for preventing pet interference, comprising: a housing including a sensing aperture; a millimeter wave radar disposed within the housing; the pyroelectric sensor is arranged in the shell and faces the sensing opening; the lens array is arranged on the sensing opening and shields the pyroelectric sensor from sensing the lower space in the space to be monitored in the vertical direction; the data processing and controlling module is connected with the pyroelectric sensor and the millimeter wave radar; and the communication module is used for connecting the data processing and control module with external equipment in a communication way. Through the shielding of lens array to the sensing space bottom, prevent that pet such as cat dog from causing the false alarm to human body existence sensor's interference.

Description

Human body presence sensor for preventing pet interference

Technical Field

The utility model relates to the technical field of intelligent home, in particular to a human body presence sensor for preventing pet interference.

Background

In order to better acquire personnel related information, the intelligent home field increasingly uses human presence sensors.

The existing human body presence sensor has certain limitations in practical application, such as high false alarm rate, large environmental influence and the like, wherein, the false alarm may be brought by pets (commonly such as cats and dogs).

The sub-sensors that the human body presence sensor may integrate include an infrared pyroelectric sensor that can detect a moving human body but cannot detect a stationary human body, and a millimeter wave radar sensor that can detect a stationary human body but is susceptible to non-biological interference. Their common disadvantage is that pet movement may result in false triggers. Therefore, for human presence sensors, it is desirable to be able to detect both stationary and moving human bodies, as well as to be able to exclude false triggers from pets.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

Aiming at the problems existing in the prior art, the utility model provides a human body presence sensor for preventing pet interference.

The human body presence sensor for preventing pet interference provided by the technical scheme of the utility model comprises:

a housing including a sensing aperture;

a millimeter wave radar disposed within the housing;

the pyroelectric sensor is arranged in the shell and faces the sensing opening;

the lens array is arranged on the sensing opening and shields the pyroelectric sensor from sensing the lower space in the space to be monitored in the vertical direction;

the data processing and controlling module is connected with the pyroelectric sensor and the millimeter wave radar;

and the communication module is used for connecting the data processing and control module with external equipment in a communication way.

Optionally, the angle of the infrared light receiving sector of the pyroelectric sensor in the horizontal direction is recorded as a first angle, the angle of the infrared light receiving sector of the pyroelectric sensor in the vertical direction is recorded as a second angle, and the first angle is more than 2 times of the second angle.

Optionally, the first angle is greater than 90 ° and the second angle is less than 45 °.

Optionally, the lens array is a fresnel lens array.

Optionally, the lens array includes a plurality of first fresnel lenses horizontally arranged, and the center of a circle of the first fresnel lenses and the sensing center of the pyroelectric sensor are on the same horizontal plane.

Optionally, the central axis of the infrared light receiving sector of the pyroelectric sensor in the vertical direction is parallel to the horizontal plane.

Optionally, the lens array includes a plurality of second fresnel lenses horizontally arranged, and the height of the center of a circle of the second fresnel lenses is lower than the height of the sensing center of the pyroelectric sensor.

Optionally, the bottom boundary of the receiving sector of the pyroelectric sensor for infrared light in the vertical direction is parallel to the horizontal plane.

Optionally, the human presence sensor for preventing pet interference further includes:

and the illuminance sensor is connected with the data processing and control module.

Optionally, the human presence sensor for preventing pet interference further includes:

the mounting bracket is used for changing the orientation angles of the pyroelectric sensor, the illuminance sensor and the millimeter wave radar;

and the power supply is used for supplying power to the pyroelectric sensor, the illuminance sensor and the millimeter wave radar.

According to the human body presence sensor for preventing the interference of the pets, the lens array shields the bottom of the sensing space, so that false alarm caused by the interference of the pets such as cats and dogs on the human body presence sensor is prevented.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following brief description will be given of the drawings used in the embodiments or the description of the prior art, it being obvious that the drawings in the following description are some embodiments of the utility model and that other drawings can be obtained from them without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a Fresnel lens array at a sensing aperture according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a receiving sector of the pyroelectric sensor of FIG. 1 in a vertical direction;

FIG. 3 is a schematic view of another Fresnel lens array at a sensing aperture according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a receiving sector of the pyroelectric sensor of FIG. 3 in a vertical direction;

FIG. 5 is a schematic view of a receiving sector of a pyroelectric sensor in a horizontal direction according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a human body presence sensor for preventing pet interference according to an embodiment of the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The human body presence sensor for preventing pet interference provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings by means of specific embodiments and application scenarios thereof.

The human body presence sensor for preventing pet interference provided by the technical scheme of the utility model comprises: a housing including a sensing aperture; the millimeter wave radar is used for detecting a static human body to reduce false alarm rate, and is arranged in the shell; a pyroelectric sensor for sensing movement of a living being (e.g., a human body), the pyroelectric sensor being disposed within the housing, the pyroelectric sensor being oriented toward the sensing aperture; the lens array is arranged on the sensing opening and shields the pyroelectric sensor from sensing the lower space in the space to be monitored in the vertical direction; the data processing and controlling module is connected with the pyroelectric sensor and the millimeter wave radar; and the communication module is used for connecting the data processing and control module with external equipment in a communication way. Millimeter wave radar adopts a certain frequency and power, transmits and receives millimeter wave signals, and calculates the position, distance, existence and stillness of a human body according to signal reflection and phase difference. The infrared light is obtained by the pyroelectric sensor through the sensing opening arranged on the shell, and the lens array screens the infrared light in all directions on the sensing opening. The data processing and control module may be a microprocessor.

In one embodiment, the pyroelectric sensor employs a pyroelectric sensor with high sensitivity, detects heat emitted by movement of a living being (e.g., a human body), and converts a signal into an electrical signal to be output.

The pyroelectric sensor is used for facing a specific space to be monitored and is used for acquiring infrared information in the space, and when the infrared movement information of the human body is found, the existence of the human body in the space can be judged. The sensing of the lens array shielding the pyroelectric sensor in the vertical direction in the lower space of the space to be monitored can be understood as that the lens array filters infrared rays in all directions which can be transmitted to the pyroelectric sensor, and shields infrared rays in the direction where possible interference exists, or that the lens array has an acceptance range, and the acceptance range is set so that the lower part of the pyroelectric sensor in the monitoring space is excluded. The shielding herein creates an infrared dead zone so that a short pet does not cause false positives.

In one embodiment, the lens array has a large horizontal detection range and a small vertical detection range, and pet movement is shielded by the small dead zone characteristic of the vertical detection range. Infrared radiation emitted by a human body is focused on the pyroelectric sensor, so that the detection effect of the sensor is improved.

Optionally, the angle of the infrared light receiving sector of the pyroelectric sensor in the horizontal direction is recorded as a first angle, the angle of the infrared light receiving sector of the pyroelectric sensor in the vertical direction is recorded as a second angle, and the first angle is more than 2 times of the second angle.

Optionally, the first angle is greater than 90 ° and the second angle is less than 45 °.

Optionally, the lens array is a fresnel lens array. It should be noted that, the fresnel lens is intended to save manufacturing materials, and if the object is not held, the technical effect of the present embodiment can be obtained by using a lens having a curved surface.

Optionally, fig. 1 is a schematic view of a fresnel lens array at a sensing opening according to an embodiment of the present utility model, as shown in fig. 1, where the lens array includes a plurality of first fresnel lenses arranged horizontally, and a center of the first fresnel lens and a sensing center of the pyroelectric sensor are on a same horizontal plane. Typically, the sensing center of the pyroelectric sensor and the geometric center of the sensing aperture are aligned. Fig. 2 is a schematic view of a receiving sector of the pyroelectric sensor in a vertical direction corresponding to fig. 1, and as shown in fig. 2, a central axis 2 of a receiving sector 1 of the pyroelectric sensor 5 for infrared light in the vertical direction is parallel to a horizontal plane. In the receiving sector of the pyroelectric sensor, the pyroelectric sensor is able to receive infrared light from an area having a similar or approximately sector cross section, and infrared light in an area other than the area is not able to be sensed by the pyroelectric sensor.

Optionally, fig. 3 is a schematic view of another fresnel lens array at a sensing opening according to an embodiment of the present utility model, as shown in fig. 3, where the lens array includes a plurality of second fresnel lenses arranged horizontally, and a center of the second fresnel lenses has a height lower than a sensing center of the pyroelectric sensor. Fig. 4 is a schematic view of a receiving sector of the pyroelectric sensor in a vertical direction corresponding to fig. 3, and as shown in fig. 4, a bottom boundary 4 of the receiving sector 1 of the pyroelectric sensor 5 for infrared light in the vertical direction is parallel to a horizontal plane. For this scheme, no infrared source with a height below 1.2m is sensed.

Further, the fresnel lens array described above has common features including: the middle part is continuously provided with 4 Fresnel lenses with smaller intervals, and two Fresnel lenses with larger distance from the middle part are arranged on two sides of the Fresnel lens.

In one embodiment, fig. 5 is a schematic view of a receiving sector of a pyroelectric sensor in a horizontal direction according to the embodiment of the present utility model, where the first angle is 110 ° as shown in fig. 5, so that the human presence sensor can have a larger sensing angle in the horizontal direction, and meanwhile, the interference of the pet is prevented by using the sensing blind area.

Optionally, the human presence sensor for preventing pet interference further includes: the illuminance sensor is used for sensing the ambient illumination brightness and is connected with the data processing and control module.

Optionally, the human presence sensor for preventing pet interference further includes: the mounting bracket is used for changing the orientation angles of the pyroelectric sensor, the illuminance sensor and the millimeter wave radar; and the power supply is used for supplying power to the pyroelectric sensor, the illuminance sensor and the millimeter wave radar.

In one embodiment, the data processing and control module processes and analyzes signals from the millimeter wave radar and the pyroelectric sensor, determines that a human body exists when the signals meet a set threshold condition, and outputs a corresponding control signal; the illuminance sensor detects the ambient illumination intensity, so that a control signal is triggered at night or under the condition of darker light; the communication module transmits the control signals output by the data processing and control module to corresponding intelligent household equipment, such as intelligent lamps and lanterns, in a wired or wireless mode; the power supply module provides a stable power supply for the sensor and can be powered by a battery or an external power supply; the mounting bracket is used for fixing the sensor, and the mounting angle and the mounting position can be adjusted according to the actual environment. In practical application, the user can install the human body presence sensor for preventing pet interference according to the practical environment and requirements. When the sensor detects that a human body exists, the corresponding intelligent household equipment can be controlled through the communication module, the functions of lighting by a person, turning on and off by the person are realized, but a pet enters a room and does not trigger to turn on the light by mistake.

In one embodiment, fig. 6 is a schematic structural diagram of a human body presence sensor for preventing pet interference in an embodiment of the present utility model, as shown in fig. 6, a sensing opening 12 is disposed on a housing 11, a lens array 9 is disposed on the sensing opening 12, an illuminance sensor 8 and a pyroelectric sensor 5 are disposed inside the housing 11, the illuminance sensor 8 and the pyroelectric sensor 5 are both screened by the lens array 9 for a sensing range, a millimeter wave radar 10 is disposed below the housing, and a data processing and control module 6 and a communication module 7 are disposed together above the housing.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A human presence sensor for preventing interference from pets, comprising:

a housing including a sensing aperture;

a millimeter wave radar disposed within the housing;

the pyroelectric sensor is arranged in the shell and faces the sensing opening;

the lens array is arranged on the sensing opening and shields the pyroelectric sensor from sensing the lower space in the space to be monitored in the vertical direction;

the data processing and controlling module is connected with the pyroelectric sensor and the millimeter wave radar;

and the communication module is used for connecting the data processing and control module with external equipment in a communication way.

2. The human presence sensor for preventing interference of pets according to claim 1, wherein an angle of a receiving sector of infrared light in a horizontal direction of the pyroelectric sensor is noted as a first angle, an angle of a receiving sector of infrared light in a vertical direction of the pyroelectric sensor is noted as a second angle, and the first angle is 2 times or more than the second angle.

3. The pet interference preventing human presence sensor according to claim 2, wherein said first angle is greater than 90 ° and said second angle is less than 45 °.

4. A human presence sensor according to any of claims 1-3 wherein said lens array is a fresnel lens array.

5. The pet interference prevention human presence sensor according to claim 4, wherein the lens array comprises a plurality of first fresnel lenses horizontally arranged, a center of the first fresnel lenses and a sensing center of the pyroelectric sensor being on a same horizontal plane.

6. The pet interference preventing human presence sensor according to claim 5, wherein a central axis of a receiving sector of said pyroelectric sensor for infrared light in a vertical direction is parallel to a horizontal plane.

7. The pet interference prevention human presence sensor according to claim 4, wherein the lens array comprises a plurality of horizontally arranged second fresnel lenses, the center of the second fresnel lenses having a height lower than the sensing center of the pyroelectric sensor.

8. The pet interference preventing human presence sensor according to claim 7, wherein a bottom boundary of the receiving sector of the pyroelectric sensor for infrared light in a vertical direction is parallel to a horizontal plane.

9. The pet interference prevention human presence sensor according to claim 1, further comprising:

and the illuminance sensor is connected with the data processing and control module.

10. The pet interference prevention human presence sensor according to claim 9, further comprising:

the mounting bracket is used for changing the orientation angles of the pyroelectric sensor, the illuminance sensor and the millimeter wave radar;

and the power supply is used for supplying power to the pyroelectric sensor, the illuminance sensor and the millimeter wave radar.