CN211699133U - Sentry post alarm based on pyroelectric infrared sensor - Google Patents
Sentry post alarm based on pyroelectric infrared sensor Download PDFInfo
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- CN211699133U CN211699133U CN202020483752.9U CN202020483752U CN211699133U CN 211699133 U CN211699133 U CN 211699133U CN 202020483752 U CN202020483752 U CN 202020483752U CN 211699133 U CN211699133 U CN 211699133U
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Abstract
The utility model provides a whistle alarm based on a pyroelectric infrared sensor, which comprises a microprocessor, an infrared detection module, a signal processor and an AD converter; the infrared detection module is connected with the signal processor, the AD converter is connected with the signal processor, the microprocessor is connected with the AD converter, the infrared detection module comprises a pyroelectric sensor and a Fresnel lens, the pyroelectric sensor is connected with the signal processor, and the Fresnel lens covers on the pyroelectric sensor. The utility model discloses utilize pyroelectric infrared sensor to carry out human monitoring, because pyroelectric infrared sensor is the bi-component, compare in other infrared detection sensor, its sensitivity is higher than one time to reverse meeting between two components will eliminate the signal change that environmental factor arouses, like the interference of the infrared ray in the sunlight and the error that ambient temperature changes and arouse etc..
Description
Technical Field
The utility model relates to a policeman's whistle position equipment on duty field, concretely relates to whistle position alarm based on pyroelectric infrared sensor.
Background
The beginning of our country's use of burglar alarm devices was in the early 60 s of the last century. The anti-theft alarm product independently developed in China is developed from an initial analog signal technology to a microwave technology to an infrared and digital pulse technology, and the sensitivity, the resolution, the detection accuracy and the working performance are greatly improved. Meanwhile, the military alarm system industry in China is gradually improved, and the concept of infrared alarm can be quickly applied to various aspects of people's life. Compared with the prior art, the armed police forces develop relatively slowly in this respect, and the alarm system still stays at an important large duty point and cannot guarantee the daily duty use of armed polices in duty activities, so that it is necessary to make a portable alarm with detection alarm and manual alarm.
Infrared alarm device is very numerous on the market, and the majority all is foreign product, and although detection performance is good, the cost is very expensive, to armed police troops characteristics of meeting more and more extensively, current infrared alarm device can not adapt to armed police troops daily requirement on duty because of its higher cost and its great volume. The general detection distance of a general infrared sensor is only 6 meters, and the environment light resistance is not strong, so that the requirement of an infrared alarm on daily duty cannot be met.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an integrate high, anti ambient light strong alarm.
In order to improve the efficiency on duty, the utility model provides a scheme is:
a sentry post alarm based on a pyroelectric infrared sensor comprises a microprocessor, an infrared detection module, a signal processor, an alarm and an AD converter;
the infrared detection module is used for acquiring an infrared trigger signal;
the signal processor is used for carrying out amplification delay processing on the infrared trigger signal;
the AD converter is used for converting the amplified infrared trigger signal into an infrared detection signal;
the microprocessor receives the infrared detection signal, compares the infrared detection signal with a preset value and outputs an alarm control signal;
the alarm receives the alarm control signal and gives an alarm in real time;
the infrared detection module comprises a pyroelectric sensor and a Fresnel lens, the pyroelectric sensor is connected with the signal processor, and the Fresnel lens is used for increasing the photosensitive angle of the pyroelectric sensor.
Further, the method comprises the following steps: the signal processor comprises an amplifier, a comparator and a delay trigger, wherein the in-phase amplification end of the amplifier is connected with the pyroelectric sensor, and the output end of the amplifier outputs an amplified signal; the positive phase end of the comparator is connected with the amplifier, and the reverse end of the comparator is connected with a reference voltage and used for limiting the amplitude of the amplified signal; the input end of the delay trigger is connected with the output end of the comparator and is used for prolonging the duration time of the amplified signal by a time domain signal; and the output end of the delay trigger is connected with the AD converter.
Further, the method comprises the following steps: the Fresnel lens is hemispherical and completely covers the optical filter of the pyroelectric sensor.
Further, the method comprises the following steps: the device also comprises a key, and the key is connected with the microprocessor.
Further, the method comprises the following steps: the alarm comprises an indicator light and a buzzer, and the indicator light and the buzzer are respectively connected with the microprocessor.
Further, the method comprises the following steps: the signal processor adopts a BISS0001 model chip; the infrared detection module is a DYP-ME003 type chip.
The utility model has the advantages that:
the utility model utilizes the pyroelectric infrared sensor to monitor the human body, and amplifies and delays the infrared trigger signal output by the pyroelectric infrared sensor for the identification of the singlechip, thereby realizing the integration of an infrared monitoring circuit and an infrared detector; the comparator connected with the reference voltage filters out voltage noise part belonging to ambient light, and the detection efficiency of the infrared detection module is improved.
Drawings
FIG. 1 is a schematic block diagram of the present invention;
FIG. 2 is a schematic structural diagram of an ordinary infrared pyroelectric sensor;
FIG. 3 is a schematic view of the sensing range of the pyroelectric infrared sensor with the Fresnel lens added;
FIG. 4 is a schematic diagram of a minimum system circuit of the single chip microcomputer;
FIG. 5 is a circuit schematic of a power module;
fig. 6 is a circuit schematic diagram of a signal processor of embodiment 1;
fig. 7 is a circuit schematic diagram of a signal processor of embodiment 2;
the pyroelectric infrared detector comprises a base 1, a preamplification circuit 2, a pyroelectric detecting element 3, an optical filter 4, a sealing cap 5, an induction angle phi and an induction distance r.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific embodiments so that those skilled in the art may better understand the present invention and practice it.
The following discloses many different embodiments or examples for implementing the subject technology described. In order to simplify the disclosure, a specific example of one or more permutations of the features is described below, but the present disclosure is not limited to the specific example, and the first feature described later in the specification may be connected to the second feature in a direct connection, or may include an embodiment forming an additional feature, and further, may include the use of one or more other intervening features to connect or combine the first feature and the second feature indirectly with each other so that the first feature and the second feature may not be directly connected.
Example 1
In the embodiment, the sentry post alarm based on the pyroelectric infrared sensor comprises a microprocessor, an infrared detection module, a signal processor, an alarm and an AD converter; the infrared detection module obtains an infrared trigger signal; the signal processor is used for carrying out amplification delay processing on the infrared trigger signal; the AD converter is used for converting the infrared trigger signal into an infrared detection signal; the microprocessor receives the infrared detection signal, compares the infrared detection signal with a preset value and outputs an alarm control signal; the infrared detection module comprises a pyroelectric sensor and a Fresnel lens, the pyroelectric sensor is connected with the signal processor, and the Fresnel lens covers the pyroelectric sensor.
Specifically, the signal processor comprises an amplifier, a comparator and a time delay trigger, wherein the amplifier is connected with the pyroelectric sensor and outputs an amplified signal; one section of the comparator is connected with the amplifier, and the other end of the comparator is connected with a reference voltage and used for limiting the amplitude of the amplified signal; the input end of the delay trigger is connected with the output end of the comparator and is used for prolonging the duration time of the amplified signal by a time domain signal; and the output end of the delay trigger is connected with the AD converter.
Specifically, the fresnel lens is hemispherical and is disposed on the optical filter 4 of the pyroelectric sensor.
Specifically, the device further comprises a key, and the key is connected with the microprocessor.
Specifically, the alarm comprises an indicator light and a buzzer, and the indicator light and the buzzer are respectively connected with the microprocessor.
The main materials of the pyroelectric infrared sensor are lithium tantalate (LiTao3), triethylene-phthalide sulfate (LATGS) and lead zirconate titanate (PZT). It is characterized by that on the piezoelectric crystal of barium titanate, the upper and lower surfaces are equipped with electrodes, and the surface is equipped with black film. When infrared rays are intermittently irradiated, the surface temperature thereof rises, so that the arrangement of atoms inside the crystal changes, i.e., spontaneous polarization charges are caused. As a pyroelectric infrared sensor for detecting a human body, a two-element sensor is often used. One of the characteristics of the dual elements is that when the energy emitted by a person sequentially strikes two elements, its output is doubled compared to one element because the two elements are connected in series; the other is that because the two elements are connected in opposite directions, the same and simultaneously input energy will cancel each other out, for example, the infrared interference in sunlight and the error caused by the change of ambient temperature, etc.
The effective detection distance of infrared pyroelectric sensor generally is 2m, and sets up the fresnel lens back in infrared pyroelectric sensor top, increases the detection distance of sensor to 10m, has satisfied the detection demand of armed police officer when the official and soldier carries out the task of on duty at the sentry, and infrared pyroelectric sensor's of ordinary is as shown in fig. 2: the sensor includes base 1, preamplification circuit 2, pyroelectric detection element 3, light filter 4 and closing cap 5, closing cap 5 is fixed to base 1's one side, closing cap 5 is inside to set up preamplification circuit 2, pyroelectric detection element 3 and light filter 4, be fixed with preamplification circuit 2 on the base 1, preamplification circuit 2 is connected pyroelectric detection element 3, and pyroelectric detection element 3 places the one side of keeping away from base 1 in preamplification circuit 2, fixed light filter 4 on the inner wall of base 1 one end is kept away from to closing cap 5. The utility model discloses at 5 tops fixed fresnel lens of closing cap, make response angle phi enlarge to 100 degrees, response distance r increases to 5-7 meters, as shown in fig. 3.
Generally, the microprocessor adopts a 52-chip microcomputer, the minimum system circuit diagram of the chip microcomputer is shown in fig. 4, and the working voltage range of the AT89C52 chip microcomputer is as follows: 4V-5.5V, wherein the power is supplied by using an external voltage of 4.5V, and J1 is a communication interface. The connection is carried out by connecting 40 pins VCC to the anode 4.5V and 20 pins VSS to the power ground. The reset circuit has the function of firstly determining the working initial state of the single chip microcomputer, and when the single chip microcomputer is supplied with external power to generate the reset circuit, the single chip microcomputer is started. If the system of the single chip microcomputer is in operation, external interference suddenly occurs so as to cause the running program to run off, and at the moment, a reset button in a reset circuit is pressed, so that the internal program can be automatically executed from the beginning.
The power supply voltage adopts 4.5V voltage power supply, three dry batteries P2 promptly, for the system provides VCC voltage, power module circuit is switch and power indicator constitution. SW1 is a power switch, and when the SW1 switch is pressed, the power indicator lamp D4 emits light to indicate the power condition, as shown in FIG. 5.
The circuit diagram of the signal processor of the present embodiment is shown in fig. 6: after a weak infrared trigger signal Vin detected by an infrared pyroelectric sensor is amplified by an amplifier U1, a double-limit voltage comparator formed by combining an amplifier U2, a comparator U3 and a comparator U4 is used for carrying out voltage upper and lower limit amplitude comparison, so that the signal can be in the identification range of an AD converter, wherein the amplifier U2 is used for amplifying the signal output by the amplifier U1 again, the comparator U3 is used for carrying out upper limit comparison and comparator U4 is used for carrying out lower limit comparison, and the reference voltage of the comparator U3 is the voltage of the non-inverting input end of the comparator U3, namely the voltage is obtained by dividing voltage by R5 and D2; the reference voltage of the comparator U4 is the voltage at the inverting input of the comparator U4, i.e., divided by R4 and D1. The signal output by the comparator U3 is filtered by the diode D4, the signal output by the comparator U4 is filtered by the diode D3, the influence of ambient light on the infrared detection module is removed by the two signals, and the two signals are collected and transmitted to the delay trigger. When receiving the input of a trigger signal, the trigger receiving end of the time delay trigger NE555 chip U5 realizes monostable time delay, and then outputs an amplified infrared trigger signal. The infrared trigger signal is converted into an infrared detection signal by the AD converter and then is identified by the microprocessor.
In addition, the keys are divided into three independent keys: the manual alarm key, the defense deployment key, the alarm cancellation key and the indicator light are also divided into three types; when a worker presses a manual alarm key, the buzzer can give out an alarm sound, and the indicator lamp gives out a corresponding color signal; when a worker presses a defense key, the second indicator lamp sends a corresponding color signal, and if the pyroelectric infrared sensor detects that a human body passes through a monitoring range area of the sensor (the monitoring distance is 5-7 m, and the monitoring angle is less than 100 degrees), the microprocessor controls the third indicator lamp to send a corresponding color signal so as to prompt that the human body enters the detection range; when the worker presses the cancel alarm key, the buzzer and the indicator light return to the initial state.
The model number of the infrared pyroelectric sensor is D203S.
Example 2
The sentry post alarm based on the pyroelectric infrared sensor in the embodiment comprises a microprocessor, an infrared detection module, a signal processor, an alarm and an AD converter; the infrared detection module obtains an infrared trigger signal; the signal processor is used for carrying out amplification delay processing on the infrared trigger signal; the AD converter is used for converting the infrared trigger signal into an infrared detection signal; the microprocessor receives the infrared detection signal, compares the infrared detection signal with a preset value and outputs an alarm control signal; the infrared detection module comprises a pyroelectric sensor and a Fresnel lens, the pyroelectric sensor is connected with the signal processor, and the Fresnel lens covers the pyroelectric sensor.
Specifically, the signal processor comprises an amplifier, a comparator and a time delay trigger, wherein the amplifier is connected with the pyroelectric sensor and outputs an amplified signal; one section of the comparator is connected with the amplifier, and the other end of the comparator is connected with a reference voltage and used for limiting the amplitude of the amplified signal; the input end of the delay trigger is connected with the output end of the comparator and is used for prolonging the duration time of the amplified signal by a time domain signal; and the output end of the delay trigger is connected with the AD converter.
Specifically, the fresnel lens is hemispherical and is disposed on the optical filter 4 of the pyroelectric sensor.
Specifically, the device further comprises a key, and the key is connected with the microprocessor.
Specifically, the alarm comprises an indicator light and a buzzer, and the indicator light and the buzzer are respectively connected with the microprocessor.
The structure of the pyroelectric infrared sensor in this embodiment is the same as that of the pyroelectric infrared sensor in embodiment 1.
The minimum system circuit diagram of the single chip microcomputer is shown in fig. 4, and the working voltage range of the AT89C52 single chip microcomputer is as follows: 4V-5.5V, wherein the power is supplied by using an external voltage of 4.5V, and J1 is a communication interface. The connection is carried out by connecting 40 pins VCC to the anode 4.5V and 20 pins VSS to the power ground. The reset circuit has the function of firstly determining the working initial state of the single chip microcomputer, and when the single chip microcomputer is supplied with external power to generate the reset circuit, the single chip microcomputer is started. If the system of the single chip microcomputer is in operation, external interference suddenly occurs so as to cause the running program to run off, and at the moment, a reset button in a reset circuit is pressed, so that the internal program can be automatically executed from the beginning.
The power supply voltage adopts 4.5V voltage power supply, three dry batteries P2 promptly, for the system provides VCC voltage, power module circuit is switch and power indicator constitution. SW1 is a power switch, and when the SW1 switch is pressed, the power indicator lamp D4 emits light to indicate the power condition, as shown in FIG. 5.
The signal processor of the embodiment adopts an existing BISS0001 model chip.
The circuit connection diagram of the BISS0001 chip is shown in FIG. 7: a VO pin of the BISS0001 chip is a signal output end for outputting an infrared detection signal, and is connected with a P1.0 pin of the singlechip; q1 is an infrared detection module, wherein a pin 1 is grounded, a pin 2 is connected with a 1-stage non-inverting input end of a BISS0001 chip, and a pin 3 is connected with VCC voltage; p1 is the pin header, and 2 feet are connected BISS0001 chip's trigger control end A, and the A end is the permission to trigger when the high level, and the A end is not allowed to trigger when the low level, and VCC voltage is connected to 1 foot, and 3 feet ground connection, accessible jumper wire cap control 2 feet input is high level or low level.
After 1 pin in BISS0001 is connected with a high level by a jumper wire, the time is delayed in the period, and if an animate object moves in the induction range, the output of the object keeps the high level all the time until the high level is converted into the low level after the animate object leaves.
To sum up, the utility model discloses utilize pyroelectric infrared sensor to carry out human monitoring, because pyroelectric infrared sensor is the bi-component, compare in other infrared detection sensor, its sensitivity is higher than one time to reverse meeting between two components will eliminate the signal change that environmental factor arouses, like the interference of the infrared ray in the sunlight and error that the ambient temperature change arouses and so on.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (6)
1. A sentry post alarm based on a pyroelectric infrared sensor is characterized by comprising a microprocessor, an infrared detection module, a signal processor, an alarm and an AD converter;
the infrared detection module is used for acquiring an infrared trigger signal;
the signal processor is used for carrying out amplification delay processing on the infrared trigger signal;
the AD converter is used for converting the amplified infrared trigger signal into an infrared detection signal;
the microprocessor receives the infrared detection signal, compares the infrared detection signal with a preset value and outputs an alarm control signal;
the alarm receives the alarm control signal and gives an alarm in real time;
the infrared detection module comprises a pyroelectric sensor and a Fresnel lens, the pyroelectric sensor is connected with the signal processor, and the Fresnel lens is used for increasing the photosensitive angle of the pyroelectric sensor.
2. The sentry post alarm based on the pyroelectric infrared sensor as claimed in claim 1, wherein the signal processor comprises an amplifier, a comparator and a time delay trigger, wherein the in-phase amplification end of the amplifier is connected with the pyroelectric sensor, and the output end outputs an amplified signal; the positive phase end of the comparator is connected with the amplifier, and the reverse end of the comparator is connected with a reference voltage and used for limiting the amplitude of the amplified signal; the input end of the delay trigger is connected with the output end of the comparator and is used for prolonging the duration time of the amplified signal by a time domain signal; and the output end of the delay trigger is connected with the AD converter.
3. A whistle alarm based on pyroelectric infrared sensor as claimed in claim 1 wherein said Fresnel lens is hemispherical and covers completely the filter (4) of said pyroelectric sensor.
4. A sentry post alarm based on a pyroelectric infrared sensor as claimed in any one of claims 1 to 3 further comprising keys connected to said microprocessor.
5. The sentry post alarm based on the pyroelectric infrared sensor as claimed in claim 1, wherein the alarm comprises an indicator light and a buzzer, and the indicator light and the buzzer are respectively connected with the microprocessor.
6. The sentry post alarm based on a pyroelectric infrared sensor as claimed in claim 1, wherein said signal processor is a BISS0001 model chip; the infrared detection module is a DYP-ME003 type chip.
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| CN202020483752.9U CN211699133U (en) | 2020-04-03 | 2020-04-03 | Sentry post alarm based on pyroelectric infrared sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115812623A (en) * | 2022-11-16 | 2023-03-21 | 武汉科技大学 | Mouse chronic fatigue syndrome single-factor modeling-bounding method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115812623A (en) * | 2022-11-16 | 2023-03-21 | 武汉科技大学 | Mouse chronic fatigue syndrome single-factor modeling-bounding method and device |
| CN115812623B (en) * | 2022-11-16 | 2023-08-22 | 武汉科技大学 | Method and device for single-factor modeling and binding of chronic fatigue syndrome of mice |
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Granted publication date: 20201016 Termination date: 20210403 |