CN219609248U

CN219609248U - Intelligent human body infrared detector

Info

Publication number: CN219609248U
Application number: CN202320826083.4U
Authority: CN
Inventors: 张祥中
Original assignee: Beijing Gantch Smart Technology Co ltd
Current assignee: Beijing Gantch Smart Technology Co ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-08-29
Anticipated expiration: 2033-04-14

Abstract

The utility model discloses an intelligent human body infrared detector which comprises a power supply circuit, a voltage stabilizing circuit, an infrared human body detection circuit, a wireless communication module and a work indicator lamp which are connected in sequence; the voltage stabilizing circuit is connected with the power supply circuit and is used for converting the power supply provided by the power supply circuit into a low-voltage power supply; the output end of the voltage stabilizing circuit is connected with an infrared human body detection circuit, and the PIR signal output of the infrared human body detection circuit is connected with a wireless communication module; the output end of the wireless communication module is connected with the work indicator lamp and is in communication connection with the mobile phone terminal through the wireless communication module. The utility model belongs to the technical field of intelligent detection equipment, and particularly provides an intelligent human body infrared detector which is applied to the field of alarm, can improve the detection range and is convenient for remote monitoring.

Description

Intelligent human body infrared detector

Technical Field

The utility model belongs to the technical field of intelligent detection equipment, and particularly relates to an intelligent human body infrared detector.

Background

Along with the development of technology, people have an increasing demand for intelligence. Along with this, the concepts of smart homes and smart buildings are also gradually coming into the field of view of the public and becoming a trend. The intelligent human body induction switch is an intelligent first step, and can be linked with an electric lamp, an alarm, an air conditioner and the like to realize intelligent control, thereby realizing the purposes of energy conservation, environmental protection, convenient management and the like.

Most of human body infrared detectors existing in the current market are based on passive infrared induction of Pyroelectric (PIR), and the sensor has high sensitivity and large area matched with suitable Fresnel lens induction, and is widely favored. Fresnel lenses have two functions: firstly, focusing, namely refracting a pyroelectric infrared signal on a PIR; secondly, the detection area is divided into a plurality of bright areas and dark areas, so that a moving object/person entering the detection area can generate a variable pyroelectric infrared signal on the PIR in a temperature change mode. When no human body moves in the detection area of the passive infrared detector, the infrared sensor senses only background temperature, when a human body enters the detection area, the pyroelectric infrared sensor senses the difference between the human body temperature and the background temperature through the Fresnel lens, and after signals are collected, the signals are compared with detection data existing in a system to judge whether an infrared source such as a person enters the detection area.

In addition, the waveform of the pyroelectric infrared induction signal is a waveform similar to a sine curve and provided with wave crests and wave troughs, meanwhile, the intensity of the pyroelectric infrared induction signal is very weak, the pyroelectric infrared induction signal is difficult to directly detect by a processor, finally, the pyroelectric infrared induction signal cannot be identified by the processor to cause the condition of missing report, and the human body detector is used for the security field and has a great security hole.

The modern technology of the human body infrared detector is utilized to integrate and realize a better solution or research and development of a proper product in the field of remote monitoring and alarming, and the market is not seen at present.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the utility model provides the intelligent human body infrared detector which is applied to the field of alarm, can improve the detection range and is convenient for remote monitoring.

The technical scheme adopted by the utility model is as follows: the utility model discloses an intelligent human body infrared detector which comprises a power supply circuit, a voltage stabilizing circuit, an infrared human body detection circuit, a wireless communication module and a work indicator lamp which are connected in sequence;

the voltage stabilizing circuit is connected with the power supply circuit and is used for converting the power supply provided by the power supply circuit into a low-voltage power supply;

the output end of the voltage stabilizing circuit is connected with an infrared human body detection circuit, and the PIR signal output of the infrared human body detection circuit is connected with a wireless communication module;

the output end of the wireless communication module is connected with the work indicator lamp and is in communication connection with the mobile phone terminal through the wireless communication module.

In a preferred scheme, the infrared human body detection circuit adopts a pyroelectric infrared sensor.

Further, the pyroelectric infrared sensor adopts a PIR612 chip, a serial resistor of a pin 2 (an output enabling setting pin (or PIR detection enabling) of the PIR612 chip is connected to an output end of the voltage stabilizing circuit, a pin 5 (PIR signal output) connecting resistor of the PIR612 chip is connected to a C2 pin of the wireless communication module, a pin 1 of the PIR612 chip is connected with a pull-down resistor and a pull-up resistor (PIR detection sensitivity setting pin) for setting sensitivity of PIR detection, a pin 6 of the PIR612 chip is connected with a voltage dividing resistor and the pull-up resistor for outputting a high level signal after a certain period of time is kept after triggering is finished (PIR high level signal output keeping period), and sensitivity and time parameters can be set through resistance values of the pull-down resistor, the voltage dividing resistor and the pull-up resistor.

In the preferred scheme, be equipped with triode drive between work pilot lamp and the wireless communication module.

Further, the intelligent human body infrared detector is used for detecting a moving object with a preset distance of 3-9 m.

As a further elaboration scheme, the wireless communication module adopts a Zigbee communication module ZT5, and realizes signal transmission through a wireless radio frequency processing technology, so as to achieve a remote monitoring effect.

As a preferable scheme, a TX7121MMR voltage stabilizing chip is adopted in the voltage stabilizing circuit.

The beneficial effects obtained by the utility model by adopting the structure are as follows: according to the intelligent human body infrared detector, on-site situation formation data can be transmitted to the cloud, and the intelligent human body infrared detector is displayed at the APP end of the mobile phone and can play a role in remote monitoring.

Drawings

Fig. 1 is a schematic diagram of the overall circuit composition of an intelligent human body infrared detector provided by the scheme;

FIG. 2 is a circuit diagram of a power supply circuit in the present embodiment;

FIG. 3 is a circuit diagram of a voltage stabilizing circuit in the present embodiment;

FIG. 4 is a circuit diagram of an infrared human body detection circuit in the present embodiment;

fig. 5 is a circuit diagram of a wireless communication module in the present solution;

FIG. 6 is a circuit diagram of the work indicator lamp in this embodiment;

fig. 7 is a schematic diagram of a key in this embodiment.

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model; 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.

1-7, the intelligent human body infrared detector comprises a power supply circuit, a voltage stabilizing circuit, an infrared human body detection circuit, a wireless communication module and a work indicator lamp which are connected in sequence;

the output end of the wireless communication module is connected with the work indicator lamp.

In the scheme, the infrared human body detection circuit adopts a pyroelectric infrared sensor, and the pyroelectric infrared sensor adopts a PIR612 chip. The wireless communication module adopts a Zigbee communication module ZT5, and realizes signal transmission through a wireless radio frequency processing technology, so as to achieve the effect of remote monitoring. And a TX7121MMR voltage stabilizing chip is adopted in the voltage stabilizing circuit.

Referring to fig. 4, the pyroelectric infrared sensor is configured by using a PIR612 chip, a serial resistor of a pin No. 2 (an output enable setting pin (or PIR detection enable)) of the PIR612 chip is connected to an output end of the voltage stabilizing circuit, a pin No. 5 (PIR signal output) connecting resistor of the PIR612 chip is connected to a pin C2 of the wireless communication module, a pin No. 1 of the PIR612 chip is connected to a pull-down resistor and a pull-up resistor (PIR detection sensitivity setting pin) for setting sensitivity of PIR detection, a pin No. 6 of the PIR612 chip is connected to a voltage dividing resistor and the pull-up resistor for outputting (PIR high level signal output holding duration) after a high level signal is held for a certain duration (60 s) after triggering, and the sensitivity and time parameters can be set by resistance values of the pull-down resistor, the voltage dividing resistor and the pull-up resistor.

In the scheme, the intelligent human body infrared detector is used for detecting a moving object with a preset distance of 3-9 m.

The pin 1 of the PIR612 chip is connected to a pull-up resistor R7 with 1MΩ, and a pull-down resistor R9 with different resistance values for detecting different preset distances, wherein the detection distance is 9M when the pull-down resistor R9 is 0Ω, the detection distance is 7M when the pull-down resistor R9 is 33KΩ, the detection distance is 6M when the pull-down resistor R9 is 47KΩ, the detection distance is 5M when the pull-down resistor R9 is 100deg.KΩ, and the detection distance is 3M when the pull-down resistor R9 is 430KΩ.

In the preferred scheme, be equipped with triode drive between work pilot lamp and the wireless communication module, just the triode is NPN triode, adopts high level drive, has the current amplification effect.

When the intelligent human body infrared detector is particularly used, as shown in the combination of fig. 1, in the circuit provided by the intelligent human body infrared detector, the 3V battery is used for supplying power, and the power supply voltage of the infrared sensor probe is supplied to the sensor probe through the PMOS tube.

When the probe detects the human body movement signal, a high level is output on the pin 5, the duration of the level is determined by the level applied to the pin 6,

as shown in FIG. 6, R11 is low-efficiency, R12, R13 and Q1 are high-efficiency, and triode driving is increased, so that the brightness of the driving LED can be effectively improved.

In addition, as shown in fig. 7, a key circuit is provided which is active low, no depression is high, and key depression is low. Because ZT5 communication module drive ability is weak, the work pilot lamp adopts high level drive, utilizes NPN triode drive, has the current amplification effect.

As shown in the TP unit of fig. 1, VBAT, GND, TX, RX, RST, SWS is used for burning and production testing, avoiding multiplexing and reserving testing points.

When the sensor detects that a person exists, the 5 th pin of the PIR612 chip outputs a high level, the communication module ZT5 is triggered, and the work indicator lights flash once. The wireless communication module is utilized to display the states of people and no people on the APP of the mobile phone terminal in real time, so that the remote monitoring function can be realized, and other equipment can be additionally linked.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.

Claims

1. An intelligent human infrared detector which is characterized in that: the infrared human body detection device comprises a power supply circuit, a voltage stabilizing circuit, an infrared human body detection circuit, a wireless communication module and a work indicator lamp which are connected in sequence;

2. The intelligent human infrared detector according to claim 1, wherein: the infrared human body detection circuit adopts a pyroelectric infrared sensor, and the pyroelectric infrared sensor adopts a PIR612 chip.

3. The intelligent human infrared detector according to claim 2, wherein: the wireless communication module adopts a communication module ZT5.

4. An intelligent human infrared detector according to claim 3, wherein: the output end of the voltage stabilizing circuit is connected with a No. 2 pin series resistor of the PIR612 chip, a No. 5 pin connecting resistor of the PIR612 chip is connected with a C2 pin of the wireless communication module, a No. 1 pin of the PIR612 chip is connected with a pull-down resistor and a pull-up resistor for setting sensitivity of PIR detection, a No. 6 pin of the PIR612 chip is connected with a voltage dividing resistor and the pull-up resistor for outputting a high-level signal after a certain period of time is kept after triggering is finished, and the sensitivity and time parameters can be set through the pull-down resistor, the voltage dividing resistor and the pull-up resistor.

5. The intelligent human infrared detector according to claim 4, wherein: the intelligent human body infrared detector is used for detecting a moving object with a preset distance of 3-9 m.

6. The intelligent human infrared detector according to claim 1, wherein: and triode driving is arranged between the work indicator lamp and the wireless communication module.

7. The intelligent human infrared detector according to claim 4, wherein: and a No. 6 pin of the PIR612 chip is connected with a pull-up resistor which is 1MΩ and a voltage dividing resistor which is 300KΩ, and the high level is maintained for 60s after the trigger of a person is detected.

8. The intelligent human infrared detector as set forth in claim 7, wherein: the No. 1 pin of the PIR612 chip is connected with a pull-up resistor which is 1MΩ, and the pull-down resistor is connected with different resistance values and used for detecting different preset distances, wherein the detection distance is 9M when the pull-down resistor is 0 Ω, the detection distance is 7M when the pull-down resistor is 33KΩ, and the detection distance is 3M when the pull-down resistor is 240KΩ.

9. The intelligent human infrared detector according to claim 6, wherein: the triode is an NPN triode, adopts high-level driving and has a current amplifying function.

10. The intelligent human infrared detector as set forth in claim 8, wherein: when a person is detected, pin 5 of the PIR612 chip outputs a high level, the communication module ZT5 is triggered, and the work indicator lights flash once.