CN213365731U - Security alarm system - Google Patents
Security alarm system Download PDFInfo
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- CN213365731U CN213365731U CN202021240256.7U CN202021240256U CN213365731U CN 213365731 U CN213365731 U CN 213365731U CN 202021240256 U CN202021240256 U CN 202021240256U CN 213365731 U CN213365731 U CN 213365731U
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Abstract
The utility model provides a security protection alarm system, include: the alarm device comprises a transmitting signal generating circuit, a first transmitting device, a reflecting signal receiving circuit, an alarm signal generating circuit and a second transmitting device, wherein the input end of the transmitting signal generating circuit is connected with a power voltage end, the first output end of the transmitting signal generating circuit is connected with the input end of the first transmitting device, the input end of the reflecting signal receiving circuit is connected with the second output end of the transmitting signal generating circuit, the output end of the reflecting signal receiving circuit is connected with the input end of the alarm signal generating circuit, and the output end of the alarm signal generating circuit is connected with the input end of the second transmitting device. The system determines whether a moving object exists by detecting the phase change of the transmitting signal and the receiving signal, can solve the safety risk caused by insensitivity, easy failure, poor penetrability and easy separation existing in the infrared security alarm, simultaneously reduces the technical threshold of installation and construction, and improves the engineering efficiency.
Description
Technical Field
The utility model relates to an intelligence house technical field particularly, mainly relates to a security protection alarm system.
Background
At present, the mainstream infrared security alarm in the current market adopts a pyroelectric infrared induction principle, a pyroelectric element loses charge balance by collecting infrared energy change and releases charges outwards, and a peripheral circuit generates an alarm signal after detection processing. Under the influence of ambient temperature, heat source, light source, radio frequency radiation and hot air flow, when the ambient temperature is close to the body temperature of a human body in summer, no infrared energy changes when the human body enters an induction range, so the human body induction performance in summer is very insensitive, and even can fail in a short time. In addition, the infrared alarm is easily influenced by dust and humidity greatly, and has great relation to the height, the angle and the movement direction of people.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect, provide a security protection alarm system to infrared alarm receives the problem that the influence is accomplished easily and lead to the precision not high among the solution prior art.
In order to realize the purpose, the following technical scheme is adopted:
in a first aspect, the utility model provides a security alarm system,
the alarm device comprises a transmitting signal generating circuit, a first transmitting device, a reflecting signal receiving circuit, an alarm signal generating circuit and a second transmitting device, wherein the input end of the transmitting signal generating circuit is connected with a power voltage end, the first output end of the transmitting signal generating circuit is connected with the input end of the first transmitting device, the input end of the reflecting signal receiving circuit is connected with the second output end of the transmitting signal generating circuit, the output end of the reflecting signal receiving circuit is connected with the input end of the alarm signal generating circuit, and the output end of the alarm signal generating circuit is connected with the input end of the second transmitting device.
Wherein, the emission signal generating circuit specifically comprises: a triode, a first capacitor, a second capacitor and a third capacitor, wherein,
the base electrode of the triode is connected with the power voltage end, the emitter electrode of the triode is connected with the input end of the reflected signal receiving circuit, and the collector electrode of the triode is connected with the input end of the first emitting device through the first capacitor, the second capacitor and the third capacitor respectively.
Wherein the transmission signal generating circuit further comprises a second resistor, a third resistor, and a fourth capacitor, wherein,
one end of the second resistor is connected with the power voltage end, the other end of the second resistor is connected with the base electrode of the triode, one end of the third resistor is connected with the base electrode of the triode, the other end of the third resistor is connected with the ground, one end of the fourth capacitor is connected with one end of the second resistor, and the other end of the fourth capacitor is connected with the other end of the third resistor.
The transmitting signal generating circuit further comprises a first resistor, one end of the first resistor is connected with the power supply voltage input end, and the other end of the first resistor is connected with one end of the second resistor.
The reflected signal receiving circuit comprises a radar antenna circuit, the input end of the radar antenna circuit is connected with the emitter of the triode, and the output end of the radar antenna circuit is connected with the input end of the warning signal generating circuit.
The system further comprises a fourth resistor, a fifth capacitor, a sixth capacitor and a seventh capacitor, wherein the anode of the fifth capacitor is connected with the output end of the radar antenna, the cathode of the fifth capacitor is connected with the ground, the anode of the sixth capacitor is connected with the output end of the radar antenna, the cathode of the sixth capacitor is connected with the ground, one end of the fifth resistor is connected with the output end of the radar antenna, the other end of the fifth resistor is connected with the ground, one end of the fourth resistor is connected with the output end of the radar antenna, the other end of the fourth resistor is connected with the ground through the seventh capacitor, and the other end of the fourth resistor is further connected with the input end of the warning signal generating circuit.
The system further comprises a radar demodulation circuit, wherein the input end of the radar demodulation circuit is connected with one end of the fourth resistor, and the output end of the radar demodulation circuit is connected with the input end of the warning signal generation circuit.
The utility model has the advantages that: whether a moving object exists is determined by detecting the phase change of the transmitting signal and the receiving signal, the safety risk caused by insensitivity, easy failure, poor penetrability and easy separation existing in the infrared security alarm can be solved, the technical threshold of installation and construction is reduced, and the engineering efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention.
Fig. 1 is a schematic structural diagram of a security alarm system according to an embodiment of the present invention.
Detailed Description
Hereinafter, various embodiments of the present invention will be described more fully. The present invention is capable of various embodiments, and modifications and variations are possible therein. However, it should be understood that: there is no intention to limit the various embodiments of the invention to the specific embodiments disclosed herein, but on the contrary, the intention is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of the various embodiments of the invention.
Hereinafter, the term "includes" or "may include" used in various embodiments of the present invention indicates the existence of the disclosed functions, operations or elements, and does not limit the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "has," "having" and their derivatives are intended to be inclusive and mean that the specified features, numbers, steps, operations, elements, components, or combinations of the foregoing, are intended only to specify the presence of, or addition to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be interpreted as excluding the first possibility of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the present invention, the expression "a or/and B" includes any or all combinations of the words listed simultaneously, e.g. may include a, may include B or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: in the present invention, unless otherwise explicitly specified or defined, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; there may be communication between the interiors of the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present invention, it should be understood by those skilled in the art that the terms indicating orientation or positional relationship herein are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The terminology used in the various embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the present invention. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
An embodiment of the utility model provides a security alarm system, as shown in FIG. 1, include: the alarm device comprises a transmitting signal generating circuit, a first transmitting device S1, a reflecting signal receiving circuit, an alarm signal generating circuit and a second transmitting device S2, wherein the input end of the transmitting signal generating circuit is connected with a power supply voltage end, the first output end of the transmitting signal generating circuit is connected with the input end of the first transmitting device, the input end of the reflecting signal receiving circuit is connected with the second output end of the transmitting signal generating circuit, the output end of the reflecting signal receiving circuit is connected with the input end of the alarm signal generating circuit, and the output end of the alarm signal generating circuit is connected with the input end of the second transmitting device.
In a specific embodiment, the transmission signal generating circuit specifically includes: a transistor Q, a first capacitor C1, a second capacitor C2 and a third capacitor C3, wherein a base of the transistor Q is connected to the +5V of the power voltage terminal, an emitter of the transistor Q is connected to the input terminal of the reflected signal receiving circuit, and a collector of the transistor Q is connected to the input terminal of the first transmitting device S1 through the first capacitor C1, the second capacitor C2 and the third capacitor C3, respectively.
The triode Q is a high-frequency triode with characteristic frequency fT being more than 9GHz, the higher fT is, the higher the high-frequency gain of the triode Q in a high-frequency microwave frequency band is, specifically, the higher fT is, the stronger the amplitude of a transmitted signal is, the more sensitive the weak microwave signal is received and induced, and the longer the induced distance is. When the PCB is wired, a copper-clad plate is laid on the back surface of the high-frequency triode, reflected waves coming from the back surface are blocked, and the anti-interference capability of the triode is improved.
In a specific embodiment, the emission signal generating circuit further includes a second resistor R2, a third resistor R3, and a fourth capacitor C4, wherein one end of the second resistor R2 is connected to the power voltage terminal, the other end of the second resistor R2 is connected to the base of the transistor Q, one end of the third resistor R3 is connected to the base of the transistor Q, the other end of the third resistor R3 is connected to ground, one end of the fourth capacitor C4 is connected to one end of the second resistor R2, and the other end of the fourth capacitor C4 is connected to the other end of the third resistor R3.
In one embodiment, the transmission signal generating circuit further includes a first resistor R1, one end of the first resistor R1 is connected to the power supply voltage input terminal, and the other end of the first resistor R1 is connected to one end of the second resistor R2.
The transmitting signal generating circuit forms an oscillating circuit through the triode, the internal resistance of the triode and the first capacitor to the third capacitor, the oscillating circuit generates a high-frequency signal, the high-frequency signal is amplified by the triode to form a 2.4-3.2 GHZ microwave signal, and the microwave signal is transmitted by the first transmitting device.
In one embodiment, the transmitting signal receiving circuit includes a radar antenna R, an input terminal of the radar antenna R is connected to the emitter of the transistor Q, and an output terminal of the radar antenna R is connected to the input terminal of the warning signal generating circuit.
Wherein the radar antenna R may be a loop radar antenna. If the transmitted microwave signal meets a moving object, the phase of the reflected wave relative to the transmitted wave changes, the return-type receiving antenna receives the reflected signal, and the phase shift frequency of the transmitted wave and the reflected wave can be output as a low-frequency signal.
In a specific embodiment, the system further includes a fourth resistor R4, a fifth resistor R5, a fifth capacitor C5, a sixth capacitor C6, and a seventh capacitor C7, wherein an anode of the fifth capacitor C5 is connected to the output terminal of the radar antenna R, a cathode of the fifth capacitor C5 is connected to ground, an anode of the sixth capacitor C6 is connected to the output terminal of the radar antenna, a cathode of the sixth capacitor C6 is connected to ground, one end of the fifth resistor R5 is connected to the output terminal of the radar antenna R, the other end of the fifth resistor R5 is connected to ground, one end of the fourth resistor R4 is connected to the output terminal of the radar antenna R, the other end of the fourth resistor R4 is connected to ground through the seventh capacitor C7, and the other end of the fourth resistor R4 is further connected to the input terminal of the second transmitting device.
In a specific embodiment, the system further includes a radar demodulation circuit, an input terminal of the radar demodulation circuit is connected to one end of the fourth resistor, and an output terminal of the radar demodulation circuit is connected to an input terminal of the warning signal generation circuit. The radar demodulation circuit comprises a chip MT2706 and a filtering and amplifying circuit.
In one embodiment, the alarm signal generating circuit generates a high level and a low level, and sends the high level and the low level to the cloud end through the second transmitting device.
The utility model discloses a security protection alarm system confirms whether there is the object of removal through the phase change that detects emission signal and received signal, can solve the security risk that insensitive, easy failure, penetrability are relatively poor, easy separation that exist in the infrared security protection alarm, has also reduced the technical threshold of installation and construction simultaneously, has improved engineering efficiency.
The embodiments described above represent only a few embodiments of the present invention, which are described in detail and specific, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, other various changes and modifications can be made according to the above-described technical solutions and concepts, and all such changes and modifications should fall within the protection scope of the present invention.
Claims (7)
1. A security alarm system, comprising: a transmission signal generating circuit, a first transmitting device, a reflected signal receiving circuit, an alarm signal generating circuit and a second transmitting device, wherein,
the input end of the transmitting signal generating circuit is connected with the power supply voltage end, the first output end of the transmitting signal generating circuit is connected with the input end of the first transmitting device, the input end of the reflecting signal receiving circuit is connected with the second output end of the transmitting signal generating circuit, the output end of the reflecting signal receiving circuit is connected with the input end of the warning signal generating circuit, and the output end of the warning signal generating circuit is connected with the input end of the second transmitting device.
2. The system according to claim 1, wherein the transmission signal generating circuit comprises: a triode, a first capacitor, a second capacitor and a third capacitor, wherein,
the base electrode of the triode is connected with the power voltage end, the emitter electrode of the triode is connected with the input end of the reflected signal receiving circuit, and the collector electrode of the triode is connected with the input end of the first emitting device through the first capacitor, the second capacitor and the third capacitor respectively.
3. The system of claim 2, wherein the transmit signal generation circuit further comprises a second resistor, a third resistor, and a fourth capacitor, wherein,
one end of the second resistor is connected with the power voltage end, the other end of the second resistor is connected with the base electrode of the triode, one end of the third resistor is connected with the base electrode of the triode, the other end of the third resistor is connected with the ground, one end of the fourth capacitor is connected with one end of the second resistor, and the other end of the fourth capacitor is connected with the other end of the third resistor.
4. The system of claim 3, wherein the transmission signal generating circuit further comprises a first resistor, one end of the first resistor is connected to the power supply voltage terminal, and the other end of the first resistor is connected to one end of the second resistor.
5. The system of claim 4, wherein the reflected signal receiving circuit comprises a radar antenna circuit, an input of the radar antenna circuit is connected to the emitter of the transistor, and an output of the radar antenna circuit is connected to an input of the warning signal generating circuit.
6. The system according to claim 5, further comprising a fourth resistor, a fifth capacitor, a sixth capacitor and a seventh capacitor, wherein an anode of the fifth capacitor is connected to the output terminal of the radar antenna, a cathode of the fifth capacitor is connected to ground, an anode of the sixth capacitor is connected to the output terminal of the radar antenna, a cathode of the sixth capacitor is connected to ground, one end of the fifth resistor is connected to the output terminal of the radar antenna, the other end of the fifth resistor is connected to ground, one end of the fourth resistor is connected to the output terminal of the radar antenna, the other end of the fourth resistor is connected to ground through the seventh capacitor, and the other end of the fourth resistor is further connected to the input terminal of the warning signal generating circuit.
7. The system of claim 6, further comprising a radar demodulation circuit, an input of the radar demodulation circuit being connected to one terminal of the fourth resistor, and an output of the radar demodulation circuit being connected to an input of the warning signal generation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021240256.7U CN213365731U (en) | 2020-06-30 | 2020-06-30 | Security alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021240256.7U CN213365731U (en) | 2020-06-30 | 2020-06-30 | Security alarm system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213365731U true CN213365731U (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021240256.7U Active CN213365731U (en) | 2020-06-30 | 2020-06-30 | Security alarm system |
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| CN (1) | CN213365731U (en) |
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- 2020-06-30 CN CN202021240256.7U patent/CN213365731U/en active Active
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Effective date of registration: 20230926 Address after: No. 15, Jiannan Road, Nanyou Community, Yuehai Street, Nanshan District, Shenzhen, Guangdong 518000 Hengda Tianjing B2801 Patentee after: Xingluo home yunwulian Technology Co.,Ltd. Address before: 31a01, block a, aerospace science and Technology Plaza, no.1698, Haizhu community, Yuehai street, Nanshan District, Shenzhen, Guangdong 518000 Patentee before: Star Network Intelligent Technology Co.,Ltd. |