CN204288408U - Four road wireless theft-proof alarms - Google Patents
Four road wireless theft-proof alarms Download PDFInfo
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- CN204288408U CN204288408U CN201420826178.7U CN201420826178U CN204288408U CN 204288408 U CN204288408 U CN 204288408U CN 201420826178 U CN201420826178 U CN 201420826178U CN 204288408 U CN204288408 U CN 204288408U
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Abstract
A kind of four road wireless theft-proof alarms, comprise Thermal release electricity infrared sensor, Thermal release electricity infrared sensor connection signal amplifying circuit, signal amplification circuit connection signal comparator circuit, signal comparator circuit connects single-chip microcomputer, single-chip microcomputer connects NRF905 wireless sending module, NRF905 wireless sending module sends signal and is provided with the NRF905 wireless receiving module of wireless reception of signals accordingly, NRF905 wireless receiving module connects single-chip microcomputer, single-chip microcomputer connects alarm module, and pyroelectric infrared sensor comprises sensor.Have anti-theft alarm function, transmitting terminal address modifiable is equivalent to four wireless theft-proof alarm transmitting terminals simultaneously, and through transmission of wireless signals, there is alert the address corresponding in receiving end display.
Description
Technical field
The utility model relates to security precautions technology field, particularly relates to a kind of four road wireless theft-proof alarms.
Background technology
At present, in the application of safety precaution intrusion alarm system, various building is different, and the requirement of safety precaution is also different, and therefore the formation of each safety precaution intrusion alarm system is also different.From an alarm detector and a warning system main control system, individual so that the system that thousands of alarm detectors and warning system main control system are formed has application to hundreds of.Some large-scale alarm system controllers host function is also quite abundant, except guard and alarm, can also use as automation control system and gate control system.Some warning systems comprise wireless system, timetable control system, relay control system, can form household and the office automation system easily.
Utility model content
The utility model will solve above-mentioned prior art Problems existing, there is provided a kind of four road wireless theft-proof alarms, have anti-theft alarm function, transmitting terminal address modifiable is equivalent to four wireless theft-proof alarm transmitting terminals simultaneously, through transmission of wireless signals, there is alert the address corresponding in receiving end display.
The utility model solves the technical scheme that its technical matters adopts: this four road wireless theft-proof alarms, comprise Thermal release electricity infrared sensor, Thermal release electricity infrared sensor connection signal amplifying circuit, signal amplification circuit connection signal comparator circuit, signal comparator circuit connects single-chip microcomputer, single-chip microcomputer connects NRF905 wireless sending module, NRF905 wireless sending module sends signal and is provided with the NRF905 wireless receiving module of wireless reception of signals accordingly, NRF905 wireless receiving module connects single-chip microcomputer, single-chip microcomputer connects alarm module, pyroelectric infrared sensor comprises sensor, working power VCC provides sensor 3 pin through resistance R6 current limliting, signal amplification circuit is defeated by by the filtering circuit that sensor 2 pin exports through R11 and C3 composition, sensor 1 pin is earth terminal.
In order to perfect further, alarm module is hummer or light emitting diode.
Perfect further, light emitting diode has 4 groups and is connected with single-chip microcomputer P2.4-P2.7 pin by power after resistance R1-R4 current limliting each anode, negative electrode of VCC.
Perfect further, signal amplification circuit is LM324 series, 2 pin (end of oppisite phase) Received signal strength of signal amplification circuit, amplified signal is exported by 1 pin, 3 pin are in-phase end, and working power VCC is supplied to 4 pin of signal amplification circuit 4, and two-stage amplifies employing electric capacity C4 coupling isolation.
Perfect further, signal comparator circuit is LM393 series, and 3 pin in-phase end signal inputs of signal comparator circuit, exported by 1 pin relatively, 2 pin end of oppisite phase provide comparative voltage by VCC through resistance R, R3 dividing potential drop, and 8 pin are power end, 4 pin ground connection.
Perfect further, single-chip microcomputer adopts STC89C52RC chip, and its pin P1.0-P1.7 is connected with wireless receiving module NRF905, and 40 pin meet power supply VCC, 20 pin ground connection, and 18,19 pin connect 12MHz clock signal, and P2.0-P2.3 is connected with 4-bit DIP switch 1-4 pin.
The effect that the utility model is useful is: the utility model, by analyzing the various schemes of existing induction and wireless transmission, have employed pyroelectric infrared sensor as front-end detector, and NRF905 carries out signal wireless transmission.Native system has anti-theft alarm function, and transmitting terminal address modifiable is equivalent to four wireless theft-proof alarm transmitting terminals simultaneously, and through transmission of wireless signals, there is alert the address corresponding in receiving end display.Also can regard as after four such transmitting terminals change its position, by reset address allow people know the difference transmitting terminal position of putting.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the schematic diagram of middle Thermal release electricity infrared sensor in the utility model;
Fig. 3 is the basic circuit diagram of signal amplification circuit in the utility model;
Fig. 4 is the pin figure of signal amplification circuit in the utility model;
Fig. 5 is the schematic diagram of signal comparator circuit in the utility model;
Fig. 6 is the schematic diagram of single-chip microcomputer in the utility model;
Fig. 7 is the schematic diagram of light emitting diode in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
With reference to accompanying drawing: four road wireless theft-proof alarms in the present embodiment, comprise Thermal release electricity infrared sensor, Thermal release electricity infrared sensor connection signal amplifying circuit, signal amplification circuit connection signal comparator circuit, signal comparator circuit connects single-chip microcomputer, single-chip microcomputer connects NRF905 wireless sending module, NRF905 wireless sending module sends signal and is provided with the NRF905 wireless receiving module of wireless reception of signals accordingly, NRF905 wireless receiving module connects single-chip microcomputer, and single-chip microcomputer connects alarm module.Alarm module is hummer or light emitting diode.Alarm module is hummer or light emitting diode, and light emitting diode has 4 groups and is connected with single-chip microcomputer P2.4-P2.7 pin by power after resistance R1-R4 current limliting each anode, negative electrode of VCC.The function of Thermal release electricity infrared sensor circuit is the infrared radiation in the induction external world and signal is converted into electric signal transmission to amplifying circuit as shown in Figure 2, and this electric signal is pulse signal.
Signal amplification circuit is LM324 series, 2 pin (end of oppisite phase) Received signal strength of signal amplification circuit, amplified signal is exported by 1 pin, and 3 pin are in-phase end, working power VCC is supplied to 4 pin of signal amplification circuit 4, and two-stage amplifies employing electric capacity C4 coupling isolation.By four independently, high-gain, internal frequency compensated operational amplifier forms LM324 series.Operational amplifier 1,2,3 pin are one group, 5,6,7 pin are one group, 8,9,10 pin are one group, 12,13,14 pin are one group, and two remaining pin are power supplys, and 1,7,8,14 is output pins of each group of amplifier, other be exactly input pin, Fig. 3 is shown in the arrangement of its pin.As accompanying drawing 4 signal amplification circuit function mainly to infrared thermal release electric the signal that accepts carry out two-stage amplification, increase signal amplitude, make the phenomenon of receiving end react clearly.
Signal comparator circuit is LM393 series, and 3 pin in-phase end signal inputs of signal comparator circuit, exported by 1 pin relatively, 2 pin end of oppisite phase provide comparative voltage by VCC through resistance R, R3 dividing potential drop, and 8 pin are power end, 4 pin ground connection.Function as accompanying drawing 5 signal comparator circuit carries out shaping to input signal to compare.3 pin signal inputs, are exported by 1 pin through comparing.When there being signal, then 1 pin exports high level, and LED gone out from original bright becoming, but due to signal be very short time, so the phenomenon that LED occurs is dodged.
Single-chip microcomputer adopts STC89C52RC chip, and its pin P1.0-P1.7 is connected with wireless receiving module NRF905, and 40 pin meet power supply VCC, 20 pin ground connection.18,19 pin connect 12MHz clock signal, and P2.0-P2.3 is connected with 4-bit DIP switch 1-4 pin.Pyroelectricity signal and the key-press status of 4-bit DIP switch (being connected with P2.0-P2.3) of the process of mainly being come in by P3.2 mouth as accompanying drawing 6 single chip circuit are delivered to wireless sending module and are sent.Signal is through comparing from the input of single-chip microcomputer 12 pin, and the program according to single-chip microcomputer STC89C52RC judges, outputs to wireless sending module NRF905 by P1.0-P1.7 pin.
NRF905 monolithic wireless transceiver works in ISM (industry, science and the medical science) channel of 433/868/915MHz, is less than 650 μ s the switching time between channel.Operating voltage is 1.9-3.6V, and 32 pin QFN encapsulate.Automatic generation lead code and CRC check code, can carry out programmed configurations easily via SPI interface.Peripheral components connects simple, without the need to outside SAW filter.
NRF905 has two kinds of mode of operations and two kinds of energy saver modes.Two kinds of mode of operations are ShockBurst TM sending mode and ShockBurst RM receiving mode respectively, and two kinds of energy saver modes are power down and SPI programming mode, STANDBY and SPI programming mode respectively.The mode of operation of NRF905 is decided by the setting of TRX_CE, TX_EN, PWR_UP tri-pins, refers to table 2-1.
The mode of operation of NRF905:
| PWR_UP | TRX_CE | TX_EN | Mode of operation |
| 0 | X | X | Shutdown mode |
| 1 | 0 | X | Idle pulley |
| 1 | 1 | 0 | Radio frequency receive mode |
| 1 | 1 | 1 | Radio frequency sending mode |
NRF905 chip can select the approach of antenna as wireless transmission of various ways.For low-loss, undersized wireless module, the tours antenna with T-shaped matching network is the solution of a fine antenna.Native system adopts this kind of antenna solutions, uses difference tours antenna.On pcb board, to have cost low for tours antenna, and directivity is better, insensitive to human body, but the feature that gain is lower.Usually be applied to the occasion that bandwidth is narrower, be conducive to suppressing strong interference.
The external circuit of NRF905 is primarily of three part compositions: the external circuit of VC0, antenna and interface driving circuit.This module has ultra-small volume (33mm × 19mm), stable performance and by advantages such as external interference, long transmission distance (accessible 200m) insensitive to power supply.Maximum transmission power+10dBm, high anti-interference GFSK modulation, can frequency hopping, largest data transfer digit rate 50kbps, unique carrier detect exports, matching addresses exports, data ready exports.Wherein pin MISO is that SPI exports, and MOSI is SPI input, and CSN is SPI Enable Pin, Low level effective.And CD, AM, DR tri-pins are respectively, and carrier detect exports, matching addresses exports, data ready exports.
Although the utility model has illustrated by reference to preferred embodiment and has described, those skilled in the art should understand, and in the scope of claims, can do the various change in form and details.
Claims (6)
1. a road wireless theft-proof alarm, comprise Thermal release electricity infrared sensor, it is characterized in that: described Thermal release electricity infrared sensor connection signal amplifying circuit, signal amplification circuit connection signal comparator circuit, signal comparator circuit connects single-chip microcomputer, single-chip microcomputer connects NRF905 wireless sending module, NRF905 wireless sending module sends signal and is provided with the NRF905 wireless receiving module of wireless reception of signals accordingly, NRF905 wireless receiving module connects single-chip microcomputer, and single-chip microcomputer connects alarm module; Described pyroelectric infrared sensor comprises sensor, and working power VCC provides sensor 3 pin through resistance (R6) current limliting, and signal amplification circuit is defeated by by the filtering circuit that sensor 2 pin exports through R11 and C3 composition, and sensor 1 pin is earth terminal.
2. four road wireless theft-proof alarms according to claim 1, is characterized in that: described alarm module is hummer or light emitting diode.
3. four road wireless theft-proof alarms according to claim 2, is characterized in that: described light emitting diode has 4 groups and is connected with single-chip microcomputer P2.4-P2.7 pin by power after resistance (R1-R4) current limliting each anode, negative electrode of VCC.
4. four road wireless theft-proof alarms according to claim 1, it is characterized in that: described signal amplification circuit is LM324 series, 2 pin (end of oppisite phase) Received signal strength of signal amplification circuit, amplified signal is exported by 1 pin, 3 pin are in-phase end, working power VCC is supplied to 4 pin of signal amplification circuit 4, and two-stage amplifies employing electric capacity (C4) coupling isolation.
5. four road wireless theft-proof alarms according to claim 1, it is characterized in that: described signal comparator circuit is LM393 series, 3 pin in-phase end signal inputs of signal comparator circuit, exported by 1 pin relatively, 2 pin end of oppisite phase provide comparative voltage by VCC through resistance (R, R3) dividing potential drop, 8 pin are power end, 4 pin ground connection.
6. four road wireless theft-proof alarms according to claim 1, it is characterized in that: described single-chip microcomputer adopts STC89C52RC chip, its pin P1.0-P1.7 is connected with wireless receiving module NRF905,40 pin meet power supply VCC, 20 pin ground connection, 18,19 pin connect 12MHz clock signal, and P2.0-P2.3 is connected with 4-bit DIP switch 1-4 pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420826178.7U CN204288408U (en) | 2014-12-23 | 2014-12-23 | Four road wireless theft-proof alarms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420826178.7U CN204288408U (en) | 2014-12-23 | 2014-12-23 | Four road wireless theft-proof alarms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204288408U true CN204288408U (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420826178.7U Expired - Fee Related CN204288408U (en) | 2014-12-23 | 2014-12-23 | Four road wireless theft-proof alarms |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106683312A (en) * | 2017-03-28 | 2017-05-17 | 国动物联网技术（上海）有限公司 | LoRa wireless human body induction security device |
| CN106710110A (en) * | 2017-03-28 | 2017-05-24 | 国动物联网技术（上海）有限公司 | NB-IoT wireless human body induction security apparatus |
| CN107845221A (en) * | 2016-09-17 | 2018-03-27 | 长沙闽壹湖电子科技有限责任公司 | A kind of design of the intelligent building safe examination system based on MSP430 |
-
2014
- 2014-12-23 CN CN201420826178.7U patent/CN204288408U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107845221A (en) * | 2016-09-17 | 2018-03-27 | 长沙闽壹湖电子科技有限责任公司 | A kind of design of the intelligent building safe examination system based on MSP430 |
| CN106683312A (en) * | 2017-03-28 | 2017-05-17 | 国动物联网技术（上海）有限公司 | LoRa wireless human body induction security device |
| CN106710110A (en) * | 2017-03-28 | 2017-05-24 | 国动物联网技术（上海）有限公司 | NB-IoT wireless human body induction security apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20151223 |
|
| EXPY | Termination of patent right or utility model |