CN203276448U - Alarm circuit - Google Patents
Alarm circuit Download PDFInfo
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- CN203276448U CN203276448U CN 201320126995 CN201320126995U CN203276448U CN 203276448 U CN203276448 U CN 203276448U CN 201320126995 CN201320126995 CN 201320126995 CN 201320126995 U CN201320126995 U CN 201320126995U CN 203276448 U CN203276448 U CN 203276448U
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Abstract
The utility model discloses an alarm circuit in an embodiment. The alarm circuit comprises a sensing module, an amplification module, a comparison module and an alarm module, wherein the sensing module is connected between a positive electrode and a negative electrode of a power supply, and used for detecting human activities within a detection area and outputting corresponding electric signals; the amplification module is connected with the sensing module, and used for amplifying the electric signals outputted by the sensing module and outputting the amplified electric signals; the comparison module is connected with the amplification module, and used for receiving the electric signals amplified by the amplification module and outputting high level; and the alarm module is connected with the comparison module, and used for receiving the high level outputted by the comparison module, connecting the positive electrode and the negative electrode of the power supply, and alarming to prompt a user. The alarm circuit disclosed by the utility model is adopted to monitor a monitoring area, and alarms automatically when a situation occurs, thereby prompting the user in real time, and guaranteeing interests of the user.
Description
Technical field
The utility model relates to electronic applications, relates in particular to a kind of warning circuit.
Background technology
Relatively pay attention to the place of security such as bank, jeweler's shop, individual residence etc. at some, because exist some more valuable money and goods, therefore for safe antitheft, higher demand is arranged, especially when night personnel's rest, it is particularly important that safe antitheft seems.
In prior art, a lot of alarms need the people just can carry out the alarm user for going to touch, if adopt this class alarm in some high secret places, do not have infrapsychic warning and have larger time ductility, the thief may poach valuable property and leave, and makes thus the user suffer larger loss.
The utility model content
The utility model embodiment technical matters to be solved is, a kind of warning circuit is provided.Can monitor the area to be monitored, automatically report to the police when situation occurring, the real-time prompting user guarantees user's interests.
In order to solve the problems of the technologies described above, the utility model embodiment provides a kind of warning circuit, comprising:
Sensing module is connected between positive source and negative pole, is used for surveying physical activity in its search coverage, exports corresponding electric signal;
Amplification module is connected with described sensing module, is used for amplifying electric signal and the output of described sensing module output;
Comparison module is connected with described amplification module, is used for receiving the electric signal after described amplification module amplifies, the output high level;
Alarm module is connected with described comparison module, is used for receiving the high level of described comparison module output, is communicated with positive source and negative pole, the alarm user.
Wherein, described circuit also comprises:
Time delay module is connected with described comparison module and described alarm module respectively, is used for extending the time that described alarm module is reported to the police.
Wherein, described circuit also comprises:
Light-operated module is connected with described amplification module and described comparison module respectively, is used for controlling according to light intensity the level height of described comparison module output.
Wherein, described sensing module is the human body heat-releasing electric transducer.
wherein, described amplification module comprises the first operational amplifier, the first feedback resistance, the first reference resistance, the second operational amplifier, the second feedback resistance and the second reference resistance, the in-phase input end of described the first operational amplifier connects the output terminal of described sensing module, inverting input is by described the first reference resistance ground connection, output terminal connects the inverting input of described the second operational amplifier by described the second reference resistance, the in-phase input end of described the second operational amplifier connects positive source, the described comparison module of output termination, described the first feedback resistance connects between the output terminal and inverting input of described the first operational amplifier, described the second feedback resistance is connected between the output terminal and inverting input of described the second operational amplifier.
wherein, described comparison module comprises double threshold comparator circuit and charging circuit, described double threshold comparator circuit comprises the first diode, the second diode, the first current-limiting resistor voltage divider, the second current-limiting resistor voltage divider, the 3rd current-limiting resistor voltage divider, the 4th current-limiting resistor voltage divider and the 3rd operational amplifier, described the first current-limiting resistor voltage divider be connected between positive source and negative pole after the second current-limiting resistor voltage divider is connected, described the 3rd current-limiting resistor voltage divider be connected between positive source and negative pole after the 4th current-limiting resistor voltage divider is connected, the positive pole of described the first diode connects the output terminal of described the second operational amplifier, negative pole connects the common node of described the first current-limiting resistor voltage divider and the second current-limiting resistor voltage divider, the positive pole of described the second diode connects the inverting input of described the 3rd operational amplifier, negative pole connects the output terminal of described the second operational amplifier, the in-phase input end of described the 3rd operational amplifier connects the negative pole of described the first diode, the positive pole of described the second diode of anti-phase input termination, the described charging circuit of output termination, described charging circuit comprises the 3rd diode, charging resistor, charging capacitor and four-operational amplifier, the positive pole of described the 3rd diode connects the output terminal of described the 3rd operational amplifier, negative pole connects described charging resistor, described charging resistor connects power cathode by described charging capacitor, the in-phase input end of described four-operational amplifier connects the common node of described charging resistor and charging capacitor, anti-phase input termination power cathode, the described alarm module of output termination.
Wherein, described alarm module comprises bidirectional triode thyristor and alarm lamp, and the anode of described bidirectional triode thyristor connects positive source by described alarm lamp, and negative electrode connects power cathode, controls the output terminal that the utmost point connects described four-operational amplifier.
Wherein, described alarm module also comprises loudspeaker and switch, and is in parallel with described alarm lamp after described loudspeaker is connected with switch.
Wherein, described time delay module comprises discharge resistance and the first adjustable resistance, is connected to the two ends of described charging capacitor after described discharge resistance and the series connection of the first adjustable resistance.
Wherein, described light-operated module comprises photoresistance, the second adjustable resistance and triode, described photoresistance be connected between the positive pole and negative pole of power supply after described the second adjustable resistance is connected, the common node of described photoresistance and described the second adjustable resistance connects the base stage of described triode, the collector of described triode connects the output terminal of described the 3rd operational amplifier and the common node of described the 3rd diode cathode, and emitter connects power cathode.
Implement the utility model embodiment, have following beneficial effect:
Adopt the detection circuit in the present embodiment, respond to by telefault the electric current that exchanges in wire and produce induction electromotive force, again by amplification module collection and amplification, export to the first indicating module indication and exchange in wire whether have alternating current, whole detection circuit frock is simple, reliability is strong, need not the internal circuit of detection circuit and light fixture is connected and just can judge the problem that no current output is arranged in wire, and then judge the position that goes wrong, easy and simple to handle, improved efficient and security that the supervisory personnel checks; Add again comparison module and the second indicating module, by judging the size of the induction electromotive force after amplification with the comparison of reference voltage, and then learn the size of alternating current in outside interchange wire, notify the supervisory personnel by the second indicating module at last, make the supervisory personnel to recognize and whether have alternating current in wire, can also recognize the size of alternating current in wire, for judgement and the eliminating of various faults provides foundation.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the connection diagram of the first embodiment of the utility model warning circuit;
Fig. 2 is the connection diagram of the second embodiment of the utility model warning circuit;
Fig. 3 is the circuit diagram of the 3rd embodiment of the utility model warning circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1, be the connection diagram of the first embodiment of the utility model warning circuit, in the present embodiment, described circuit comprises: sensing module 1, amplification module 2, comparison module 3 and alarm module 4.
Described sensing module 1 is connected between positive source and negative pole, is used for surveying physical activity in its search coverage, exports corresponding electric signal;
Described amplification module 2 is connected with described sensing module 1, is used for amplifying electric signal and the output of described sensing module 1 output; Particularly, strong and weak according to the electric signal of described sensing module output, single-stage amplifying circuit or multistage amplifier circuit can be set electric signal is amplified to satisfy the subsequent conditioning circuit requirements of one's work.
Described comparison module 3 is connected with described amplification module 2, is used for receiving the electric signal after described amplification module 2 amplifies, the output high level;
Described alarm module 4 is connected with described comparison module 3, is used for receiving the described relatively high level of 3 outputs of mould, is communicated with positive source and negative pole, the alarm user.
Survey in its search coverage by sensing module 1 and survey physical activity, when having the people movable in its search coverage, described sensing module 1 just can generate faint electric signal, amplify by amplification module 2 again, comparison module 3 is exported high level more afterwards with the mode warning reminding user of trigger alarm module with sound or light, whole process need not manually-operated, convenient to use, can monitor the area to be monitored, automatically report to the police during the appearance situation, the real-time prompting user guarantees user's interests.
Please refer to Fig. 2, be the connection diagram of the second embodiment of the utility model warning circuit, in the present embodiment, described circuit comprises: sensing module 1, amplification module 2, comparison module 3, alarm module 4, time delay module 5 and light-operated module 6.
Described sensing module 1 is connected between positive source and negative pole, is used for surveying physical activity in its search coverage, exports corresponding electric signal;
Described amplification module 2 is connected with described sensing module 1, is used for amplifying electric signal and the output of described sensing module 1 output;
Described comparison module 3 is connected with described amplification module 2, is used for receiving the electric signal after described amplification module 2 amplifies, the output high level;
Described alarm module 4 is connected with described comparison module 3, is used for receiving the described relatively high level of 3 outputs of mould, is communicated with positive source and negative pole, the alarm user;
Described time delay module 5 is connected with described comparison module 3 and described alarm module 4 respectively, is used for extending the time that described alarm module 4 is reported to the police;
Described light-operated module 6 is connected with described amplification module 2 and described comparison module 3 respectively, is used for controlling according to light intensity the level height of described comparison module output.
In the present embodiment, by time delay module 5 is set, can extend the time that alarm module 4 is reported to the police, avoid the user not hear or see the problem of alerting signal, further strengthen the effect of reporting to the police, promote security; By light-operated module is set, close warning circuit under the situation that personnel are more and watchful by day, open alarm circuit when the less needs of personnel are had a rest is at night avoided the more wrong report that causes because of the personnel on daytime, has strengthened the specific aim of warning circuit service time.
Please refer to Fig. 3, be the circuit diagram of the 3rd embodiment of the utility model warning circuit, in the present embodiment, described circuit comprises: sensing module, amplification module, comparison module, alarm module, time delay module and light-operated module.
Preferably, described sensing module is human body heat-releasing electric transducer P2288.
preferably, described amplification module comprises the first operational amplifier U1, the first feedback resistance R5, the first reference resistance R4, the second operational amplifier U2, the second feedback resistance R9 and the second reference resistance R6, the in-phase input end of described the first operational amplifier U1 connects the output terminal of described sensing module, inverting input is by described the first reference resistance R4 ground connection, output terminal connects the inverting input of described the second operational amplifier U2 by described the second reference resistance R6, the in-phase input end of described the second operational amplifier U2 connects positive source, the described comparison module of output termination, described the first feedback resistance R5 connects between the output terminal and inverting input of described the first operational amplifier U1, described the second feedback resistance R9 is connected between the output terminal and inverting input of described the second operational amplifier U2.
Although Fig. 3 shows a kind of concrete structure of amplification module, the utility model is not limited to this.It will be appreciated by those skilled in the art that the utility model can also comprise the electric signal that is used for the output of reception sensing module of other any appropriate and amplify the circuit structure of output.But, amplifying circuit as shown in Figure 3 is not only simple in structure, and amplification effect is good, can change the progression that amplifies according to the actual size of signal induced electricity and just can obtain desirable amplification result, and is easy to adjust, although provided the circuit structure that two-stage is amplified in the present embodiment, but when induction electromotive force is larger, can adopt the single-stage amplifying circuit, when induction electromotive force hour, can adopt multistage amplifier circuit, only need the simple quantity of adjusting operational amplifier to get final product.
preferably, described comparison module comprises double threshold comparator circuit and charging circuit, described double threshold comparator circuit comprises the first diode D1, the second diode D2, the first current-limiting resistor voltage divider R11, the second current-limiting resistor voltage divider R10, the 3rd current-limiting resistor voltage divider R12, the 4th current-limiting resistor voltage divider R13 and the 3rd operational amplifier U3, described the first current-limiting resistor voltage divider R11 be connected between positive source and negative pole after the second current-limiting resistor voltage divider R10 connects, described the 3rd current-limiting resistor voltage divider R12 be connected between positive source and negative pole after the 4th current-limiting resistor voltage divider R13 connects, the positive pole of described the first diode connects the output terminal of described the second operational amplifier U2, negative pole connects the common node of described the first current-limiting resistor voltage divider R11 and the second current-limiting resistor voltage divider R10, the positive pole of described the second diode D2 connects the inverting input of described the 3rd operational amplifier U3, negative pole connects the output terminal of described the second operational amplifier U2, the in-phase input end of described the 3rd operational amplifier U3 connects the negative pole of described the first diode D1, the positive pole of described the second diode D2 of anti-phase input termination, the described charging circuit of output termination, described charging circuit comprises the 3rd diode D3, charging resistor R14, charging capacitor C8 and four-operational amplifier U4, the positive pole of described the 3rd diode D3 connects the output terminal of described the 3rd operational amplifier U3, negative pole meets described charging resistor R14, described charging resistor R14 connects power cathode by described charging capacitor C8, the in-phase input end of described four-operational amplifier U4 connects the common node of described charging resistor R14 and charging capacitor C8, anti-phase input termination power cathode, the described alarm module 4 of output termination.
Preferably, described alarm module comprises bidirectional triode thyristor Q1 and alarm lamp LAMP, and the anode of described bidirectional triode thyristor Q1 connects positive source by described alarm lamp LAMP, and negative electrode connects power cathode, controls the output terminal that the utmost point meets described four-operational amplifier U4.
More preferably, described alarm module also comprises loudspeaker HA and switch S, and is in parallel with described alarm lamp LAMP after described loudspeaker HA connects with switch S.
Described time delay module comprises discharge resistance R15 and a VR1 adjustable resistance, is connected to the two ends of described charging capacitor C8 after described discharge resistance R15 and the first adjustable resistance VR1 series connection.
Described light-operated module comprises photoresistance CDS, the second adjustable resistance VR2 and triode V, described photoresistance CDS be connected between the positive pole and negative pole of power supply after described the second adjustable resistance VR2 connects, the common node of described photoresistance CDS and described the second adjustable resistance VR2 connects the base stage of described triode V, the collector of described triode V connects the output terminal of described the 3rd operational amplifier U3 and the common node of described the 3rd diode U3 positive pole, and emitter connects power cathode.
The human body heat-releasing electric transducer is made acquisition of signal, and is highly sensitive, and detection range can reach more than 10 meters, and its depression angle can reach 86 degree, and the horizontal view angle can reach 120 degree.Because it discharges human body, the infrared light of specific wavelength is the most responsive, thereby misoperation is minimum.When the people being arranged in its search coverage during with the frequency activity of 0.3-3HZ, it just can generate faint electric signal, after U1 and U2 two-stage are amplified, and the strong signal of the 7 foots output 0.5-5.5V of U2.Wherein D1, D2, R10-R13 and U3 form the double threshold comparer, because the signal voltage that the human body heat-releasing electric transducer is inducted can just can be born, therefore the voltage of the 7 pin outputs of U2 also can just also can be born.When the voltage of its output reaches the first threshold voltage 4.1V when above, put on the voltage of 10 pin of U3 by D1 higher than the voltage 3.3V of 9 pin, make the 8 pin output noble potentials of U3; And when the current potential of the 7 pin outputs of U2 during lower than the second threshold voltage 2V, the voltage of 9 pin of U3 will drop to below 2.7V by D2, and its 8 pin is also exported noble potential.At ordinary times during no signal, due to the current potential of 9 pin of U3 higher than 10 pin, therefore 8 pin no-outputs.Therefore as long as when sensor detects signal, 8 pin are certain output noble potential just, charges to C8 by D3, R14, makes the 12 pin current potentials of U4 higher than 13 pin, and its 14 pin output noble potential triggers bidirectional triode thyristor Q1 conducting, lights alarm lamp LAMP.Need approximately 2 minutes because C8 institute accumulate can pass through R15, VR1 discharge, thus in these 2 minutes alarm lamp LAMP light yellow always.When the voltage on C8 during lower than 13 pin voltage, 14 pin no-outputs, Q1 closes, alarm lamp LAMP automatic distinguishing.When falling asleep night, can switch S is closed, in case the thief slips in search coverage, can be accompanied by the tinkle of bells your writing of loudspeaker HA when lamp is bright, play anti-theft function.Photoresistance CDS and triode V etc. form light-operated circuit, the resistance of daytime because of photoresistance very little (10K is following), triode V saturation conduction, 8 pin of U3 are clamped to the 0.3V left and right, therefore no matter have or not induced signal, bidirectional triode thyristor Q1 all can not conducting, and alarm lamp lamp LAMP can not light; To night, because the resistance of photoresistance become greater to several megaohms, triode V conducting cut-off, 8 pin of U3 no longer are subjected to its clamper, in case sensor detects signal, 8 pin are just exported high level immediately, make bidirectional triode thyristor Q1 conducting, alarm lamp LAMP is lighted reminding user.
Need to prove, each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part gets final product referring to the part explanation of embodiment of the method.
By the description of above-described embodiment, the utlity model has following advantage:
Survey in its search coverage by sensing module and survey physical activity, when having the people movable in its search coverage, described sensing module just can generate faint electric signal, amplify by amplification module again, comparison module is exported high level more afterwards with the mode warning reminding user of trigger alarm module with sound or light, whole process need not manually-operated, convenient to use, can monitor the area to be monitored, automatically report to the police during the appearance situation, the real-time prompting user guarantees user's interests; By time delay module is set, can extend the time that alarm module is reported to the police, avoid the user not hear or see the problem of alerting signal, further strengthened the effect of reporting to the police, promoted security; By light-operated module is set, close warning circuit under the situation that personnel are more and watchful by day, open alarm circuit when the less needs of personnel are had a rest is at night avoided the more wrong report that causes because of the personnel on daytime, has strengthened the specific aim of warning circuit service time.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in above-described embodiment method, to come the relevant hardware of instruction to complete by computer program, described program can be stored in a computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory is called for short ROM) or random store-memory body (Random Access Memory is called for short RAM) etc.
Above disclosed is only the utility model preferred embodiment, certainly can not limit with this interest field of the utility model, and the equivalent variations of therefore doing according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (10)
1. a warning circuit, is characterized in that, comprising:
Sensing module is connected between positive source and negative pole, is used for surveying physical activity in its search coverage, exports corresponding electric signal;
Amplification module is connected with described sensing module, is used for amplifying electric signal and the output of described sensing module output;
Comparison module is connected with described amplification module, is used for receiving the electric signal after described amplification module amplifies, the output high level;
Alarm module is connected with described comparison module, is used for receiving the high level of described comparison module output, is communicated with positive source and negative pole, the alarm user.
2. circuit as claimed in claim 1, is characterized in that, described circuit also comprises:
Time delay module is connected with described comparison module and described alarm module respectively, is used for extending the time that described alarm module is reported to the police.
3. circuit as claimed in claim 2, is characterized in that, described circuit also comprises:
Light-operated module is connected with described amplification module and described comparison module respectively, is used for controlling according to light intensity the level height of described comparison module output.
4. circuit as claimed in claim 3, is characterized in that, described sensing module is the human body heat-releasing electric transducer.
5. circuit as claimed in claim 4, it is characterized in that, described amplification module comprises the first operational amplifier, the first feedback resistance, the first reference resistance, the second operational amplifier, the second feedback resistance and the second reference resistance, the in-phase input end of described the first operational amplifier connects the output terminal of described sensing module, inverting input is by described the first reference resistance ground connection, output terminal connects the inverting input of described the second operational amplifier by described the second reference resistance, the in-phase input end of described the second operational amplifier connects positive source, the described comparison module of output termination, described the first feedback resistance connects between the output terminal and inverting input of described the first operational amplifier, described the second feedback resistance is connected between the output terminal and inverting input of described the second operational amplifier.
6. circuit as claimed in claim 5, it is characterized in that, described comparison module comprises double threshold comparator circuit and charging circuit, described double threshold comparator circuit comprises the first diode, the second diode, the first current-limiting resistor voltage divider, the second current-limiting resistor voltage divider, the 3rd current-limiting resistor voltage divider, the 4th current-limiting resistor voltage divider and the 3rd operational amplifier, described the first current-limiting resistor voltage divider be connected between positive source and negative pole after the second current-limiting resistor voltage divider is connected, described the 3rd current-limiting resistor voltage divider be connected between positive source and negative pole after the 4th current-limiting resistor voltage divider is connected, the positive pole of described the first diode connects the output terminal of described the second operational amplifier, negative pole connects the common node of described the first current-limiting resistor voltage divider and the second current-limiting resistor voltage divider, the positive pole of described the second diode connects the inverting input of described the 3rd operational amplifier, negative pole connects the output terminal of described the second operational amplifier, the in-phase input end of described the 3rd operational amplifier connects the negative pole of described the first diode, the positive pole of described the second diode of anti-phase input termination, the described charging circuit of output termination, described charging circuit comprises the 3rd diode, charging resistor, charging capacitor and four-operational amplifier, the positive pole of described the 3rd diode connects the output terminal of described the 3rd operational amplifier, negative pole connects described charging resistor, described charging resistor connects power cathode by described charging capacitor, the in-phase input end of described four-operational amplifier connects the common node of described charging resistor and charging capacitor, anti-phase input termination power cathode, the described alarm module of output termination.
7. circuit as claimed in claim 6, it is characterized in that, described alarm module comprises bidirectional triode thyristor and alarm lamp, and the anode of described bidirectional triode thyristor connects positive source by described alarm lamp, negative electrode connects power cathode, controls the output terminal that the utmost point connects described four-operational amplifier.
8. circuit as claimed in claim 7, is characterized in that, described alarm module also comprises loudspeaker and switch, and is in parallel with described alarm lamp after described loudspeaker is connected with switch.
9. circuit as claimed in claim 8, is characterized in that, described time delay module comprises discharge resistance and the first adjustable resistance, is connected to the two ends of described charging capacitor after described discharge resistance and the series connection of the first adjustable resistance.
10. circuit as claimed in claim 9, it is characterized in that, described light-operated module comprises photoresistance, the second adjustable resistance and triode, described photoresistance be connected between the positive pole and negative pole of power supply after described the second adjustable resistance is connected, the common node of described photoresistance and described the second adjustable resistance connects the base stage of described triode, the collector of described triode connects the output terminal of described the 3rd operational amplifier and the common node of described the 3rd diode cathode, and emitter connects power cathode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320126995 CN203276448U (en) | 2013-03-19 | 2013-03-19 | Alarm circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320126995 CN203276448U (en) | 2013-03-19 | 2013-03-19 | Alarm circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105205964A (en) * | 2015-10-27 | 2015-12-30 | 广西职业技术学院 | Burglar alarm device for balcony |
| CN105225396A (en) * | 2015-11-02 | 2016-01-06 | 广西职业技术学院 | A kind of burglar alarm with active alarm function |
| CN107464404A (en) * | 2017-09-13 | 2017-12-12 | 山东航海电器设备有限公司 | A kind of PCM switch alarms device |
| CN109999271A (en) * | 2019-04-30 | 2019-07-12 | 冯耀明 | A kind of infusion alarm |
-
2013
- 2013-03-19 CN CN 201320126995 patent/CN203276448U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105205964A (en) * | 2015-10-27 | 2015-12-30 | 广西职业技术学院 | Burglar alarm device for balcony |
| CN105225396A (en) * | 2015-11-02 | 2016-01-06 | 广西职业技术学院 | A kind of burglar alarm with active alarm function |
| CN107464404A (en) * | 2017-09-13 | 2017-12-12 | 山东航海电器设备有限公司 | A kind of PCM switch alarms device |
| CN109999271A (en) * | 2019-04-30 | 2019-07-12 | 冯耀明 | A kind of infusion alarm |
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| CF01 | Termination of patent right due to non-payment of annual fee |