CN204117181U - 125KHz low frequency triggers 433MHz warning and follows the trail of card - Google Patents
125KHz low frequency triggers 433MHz warning and follows the trail of card Download PDFInfo
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- CN204117181U CN204117181U CN201420582067.6U CN201420582067U CN204117181U CN 204117181 U CN204117181 U CN 204117181U CN 201420582067 U CN201420582067 U CN 201420582067U CN 204117181 U CN204117181 U CN 204117181U
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Abstract
The utility model provides a kind of 125KHz low frequency and triggers 433MHz warning tracking card, be of a size of 86 × 54 × 5mm, card stock is ABS, it is characterized in that, described tracking card of reporting to the police comprises the PCB substrate of 45 × 31mm, described PCB substrate is provided with MCU control circuit, described MCU control circuit is connected to 433MHz RF transmit-receive circuit, 125KHz low frequency trigger circuit, enhancement mode feed circuit, voltage detecting circuit, warning/shielding button and status indicator LED, described voltage detecting circuit is connected with described enhancement mode feed circuit, the utility model is mainly used in the accurate orientation management of personnel.
Description
Technical field
The utility model relates to radio RF recognition technology field, particularly relates to a kind of portable 125KHz low frequency and triggers 433MHz warning tracking card.
Technical background
RFID technique and REID (Radio Frequency Identification) are one and utilize radiofrequency signal realize contactless information transmission by Space Coupling (alternating magnetic field or electromagnetic field) and pass through the technology that transmitted information reaches identifying purpose.And radio-frequency recognition system is made up of electronic tag and reader usually.
The electronic data of certain format is had, often in this, as the identification information of article to be identified in electronic tag.Reader comprises reader and antenna, and antenna is used for transmitting radiofrequency signal between electronic tag and reader.
RFID is a revolution for Computer Automatic Recognition technology, drastically increases information processing efficiency and accuracy.RFID is that electronic tag just can complete identification with reader without the need to contacting compared with the obvious advantage of other technology.REID changes bar code and relies on the one dimension of " tangible " or two-dimensional geometry pattern to provide the mode of information, is provided " invisible " information of enormous amount stored therein by chip.
Reader is the equipment reading and write electronic labeling information.Reader also should possess the function communicated with GPRS wireless communication terminal simultaneously, the Signal transmissions of electronic tag to GPRS radio communication launch terminal, can coordinate with system software, can the position of accurate positioning electronic tag.Electronic tag is attached on article to be identified in application, as the electronic marker of article to be identified, reader and electronic tag can by the communication protocol transinformations of arranging, typically send order by reader to electronic tag, electronic tag according to the order of the reader received, by the identification data back of internal memory to reader.
The proposition of Internet of Things concept, creates huge impetus to the development of RFID industry.Based on the unique identification characteristic of RFID label tag to object, cause the upsurge that people study internet in kind (Internet of Things).Internet of Things is by sticking RFID label tag to all article, builds all Item Information networks participating in circulation on existing Internet basic.The foundation of Internet of Things brings profound influence by the links of the item circulation such as the manufacturing, sale, transport, use, recovery and government, enterprises and individuals's behavior.By Internet of Things, in the world any article can whenever and wherever possible as required identified, follow the trail of and monitoring.Internet of Things is regarded as the revolution again of IT industry after Internet.
Similarly in the environment such as home for destitute, prison, hospital, the position of real-time grasp personnel is of great importance.Know that the position of personnel or region can improve the efficiency of management greatly accurately, the process of emergency in addition also needs there is real-time understanding to personnel's distribution situation.Real-time positioning system with other field is compared, the requirement that the environment such as home for destitute, prison, hospital have it special, such as when old man faces a danger, in existing personnel location system, old man cannot initiatively initiate to report to the police, the processing time of peril may be delayed thus, cause the generation of unscheduled event.
Utility model content
The utility model is based on above-mentioned application characteristic, use RFID correlation technique, by cleverly design and well-designed, develop a kind of accurate fixation and recognition card of low-power consumption that can realize initiative alarming and initiatively shielding tracking, the personnel that realize thus identify at a distance, locate and emergency call function.
Embodiment of the present utility model provides a kind of 125KHz low frequency to trigger 433MHz warning and follows the trail of card, it is of a size of 86 × 54 × 5mm, material is ABS, it mainly comprises printed circuit board (PCB) (PCB) substrate of 45 × 31mm, and the MCU control circuit on substrate, what be connected with MCU circuit comprises 433MHz RF transmit-receive circuit, the low trigger circuit of 125KHz and antenna, enhancement mode feed circuit, voltage detecting circuit, warning/shielding button and status indicator LED.Card various functions is realized by tight, the accurate cooperation between software and hardware.
Described MCU control section is central authorities' process and the integrating control unit that 125KHz low frequency triggers that card is followed the trail of in 433MHz warning, its functional character has following a few part: (1) is responsible for the normal work coordinating card each several part circuit, comprise and receive and analyze external command, according to different external trigger instructions, Control peripheral circuit makes respective reaction.(2) realize the various functions of card, comprise automatic frequency-hopping and Unique Device address combined technology, button are reported to the police, bit mask and low-voltage warning etc.; (3) software systems that memory card is complete and the unique identification information of card.
Further, described 433MHz radio circuit, the Ban Zai omnidirectional 3D helical antenna comprising signal processing circuit He be attached thereto.Described signal processing circuit, can realize base band signal process, digital/analog signal conversion, signal amplification.Described 3D helical antenna is omnidirectional 433MHz dual-mode antenna, the signal of signal processing circuit process can be launched reliably.
Further, described 125KHz low frequency trigger circuit, the two-way 125KHz directional induction antenna comprising low frequency wake-up circuit He be attached thereto.Described low frequency wake-up circuit, it can keep card standby with extremely low power dissipation, prepares at any time to receive 125KHz wake-up signal, carries out respective handling with wake-up circuit.Described two-way 125KHz directional induction antenna, is embedded in PCB substrate, and mutual homeotropic alignment, can ensure that card is under any state, good receiving sensitivity can be had to the 125KHz wake-up signal that card reader sends.
Further, described enhancement mode feed circuit, adopt the power-supplying circuit that two-way is in parallel, each road is that the button-shaped lithium-manganese cell of 150mAh is powered, this powering mode can not only make increasing in the serviceable life of card power supply be twice, also can strengthen the stability of card simultaneously, can ensure still can normally work when a road powers and damages.
Further, described voltage detecting circuit, can Real-Time Monitoring power source supplying voltage, and the magnitude of voltage detected is passed to MCU, judged by MCU process, result is passed to 433MHz radio circuit, card reader is sent to by radio circuit, again through card reader dissection process, then pass to host computer by 485 buses, thus enable the electricity of card by Real-Time Monitoring, once find that card battery electricity is lower than preset value, timely replacing battery, to ensure the normal use of card various functions.
Further, described warning/shielding button, can trigger alarm instruction, and warning message is passed to MCU; Alarm key can trigger shielding trace instruction, and button shielded signal is passed to MCU.
Further, described status indicator LED, can different conditions residing for card, makes the display with different characteristic.
The utility model has following several technological innovations:
1.125KHz low frequency triggers and combines with 433MHz high-frequency communication
125KHz low frequency triggering technique is adopted to achieve the accurate location to card in conjunction with 433MHz high-frequency communication technology.Traditional for the orientation management of card or be adopt simple 433M or 2.4G, or be adopt 125K low frequency to trigger to combine with 2.4G.Simple 433M or 2.4G is adopted not realize the accurate location of card; Due to the electromagnetic characteristics of 2.4G itself, its wavelength ratio is shorter, not there is diffraction characteristics and aerial decay is very fast, if adopt 125K and 2.4G to combine, when card is in human body back or card is placed in pocket, although card can be triggered by 125K, 2.4G communication can not be set up; And if adopt 2.4G to realize wireless networking, due to its electromagnetic characteristics, its limited coverage area, can not realize only laying 1 or several wireless networking devices to manage all cards at first floor, can only realize wireless networking by the intensive 2.4G card reader that lays, this networking mode cost is higher and site operation is very complicated.Adopt 125K and 433M to combine and just can overcome the shortcoming of above-mentioned two kinds of methods, because the wavelength of 433M is longer, frequency moderate, there is good diffraction characteristics and transmission attenuation is slower in atmosphere, even if card is in human body back or card is placed in pocket, also can effectively set up 433M high-frequency communication; And the diffraction characteristics due to 433M is good and emissive power is high, wireless networking is carried out by 433M, only need 1 or several wireless networking devices just can cover all cards of this first floor, provide cost savings greatly and considerably reduce the workload of site operation.So employing 125K triggering technique combines to be better than with 433M high-frequency communication adopt simple 433M or 2.4G, and 125K triggering is adopted to combine with 2.4G.
2. trigger is by 433M retransmission technique
Be combined within one device by 125K is triggered with 433M card-reading function, this equipment constantly can complete and send 125K trigger command, receives 433M card number and the 433M card data got can be transmitted to 433M wireless networking devices again.Because the triggering of 125K itself can reach about 5 meters apart from maximum, 433M communication distance so between card with this all-in-one also only needs to reach just passable apart from identical distance with triggering, it is very little that the output power of the 433M chip so on card just can be established, thus the whole power consumption of card can reduce effectively, the serviceable life of such card can be improved to a great extent.
3. Anti-interference algorithm
The 433MHz high-frequency communication that four-way triggers between integral card reader and card has 40 channels to use, and each channel be spaced apart 1MHz.The technology adopting automatic frequency-hopping to combine with Unique Device address achieves every platform four-way high-frequency communication triggered between integral card reader and card and is all in an independently channel, completely not by the interference of other channel; This technology greatly reduces the data of redundancy, effectively ensure that real-time and the reliability of the data transmission of whole system.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in below describing is only embodiments more of the present utility model, for those of ordinary skills, under the prerequisite not paying creative work, other embodiment and accompanying drawing thereof can also be obtained according to these accompanying drawing illustrated embodiments.In the accompanying drawings:
Fig. 1 is principle of compositionality block diagram of the present utility model;
Fig. 2 is that the utility model triggered location realizes former signal reason figure;
Fig. 3 is the principle schematic that the utility model realizes card turnover judgement;
Fig. 4 is the principle schematic that the utility model realizes following the trail of function of shielding.
Embodiment
Carry out clear, complete description below with reference to the technical scheme of accompanying drawing to each embodiment of the utility model, obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiments.Based on the embodiment in the utility model, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope that the utility model is protected.
Figure 1 shows that the utility model 125KHz low frequency triggers the structured flowchart that card is followed the trail of in 433MHz warning, integrated structure block diagram, does the utility model each several part circuit major function and gordian technique with detailed introduction.
125KHz low frequency triggers 433MHz warning and follows the trail of the PCB substrate of blocking and mainly comprising 45 × 31mm, and the MCU control circuit on substrate, what be connected with MCU circuit comprises 433MHz radio circuit, 125KHz low frequency trigger circuit and antenna, enhancement mode feed circuit, voltage detecting circuit, warning/shielding button and status indicator LED.Card various functions is achieved by tight, the accurate cooperation between software and hardware.
Described MCU control section is central authorities' process and the integrating control unit that 125KHz low frequency triggers that card is followed the trail of in 433MHz warning, and its functional character has following a few part: the software section of (1) memory card, preserves the unique identification information of card; (2) be responsible for the normal work connecting and coordinate card each several part circuit, comprise and receive and analyze external command, according to different external trigger instructions, Control peripheral circuit sends corresponding signal.During as received the outer triggering signal of 125KHz, the card reader identification information that card reader sends by MCU is resolved, and integrates with the unique identification information of card, sends to card reader by 433MHz radio circuit; (3) realize the various functions of card, comprise automatic frequency-hopping and Unique Device address combined technology, button are reported to the police, shielded and follow the trail of and low-voltage warning etc.
Described 433MHz radio circuit, the Ban Zai omnidirectional 3D helical antenna comprising signal processing circuit He be attached thereto.Described signal processing circuit, can realize base band signal process, digital/analog signal conversion, signal amplification.Described 3D helical antenna is omnidirectional 433MHz dual-mode antenna, the signal of signal processing circuit process can be launched reliably.
Described 125KHz low frequency trigger circuit, the two-way 125KHz directional induction antenna comprising low frequency wake-up circuit He be attached thereto.Described low frequency wake-up circuit, it can keep card standby with extremely low power dissipation, prepares at any time, to reception 125KHz wake-up signal, to carry out respective handling with wake-up circuit.Described two-way 125KHz directional induction antenna, is embedded in PCB substrate, and mutual homeotropic alignment, can ensure that card is under any state, good receiving sensitivity can be had to the 125KHz wake-up signal that card reader sends.
Described enhancement mode feed circuit, as shown in power supply in Fig. 11 and power supply 2, adopt the power-supplying circuit that two-way is in parallel, each road all adopts the button-shaped lithium-manganese cell of 150mAh to power.Compared to single service pattern, this two-way parallel operation pattern can not only make increasing in the serviceable life of card power supply be twice, and also can strengthen the stability of card simultaneously, can ensure still can normally work when a road powers and damages.
Described voltage detecting circuit, can Real-Time Monitoring power source supplying voltage, and the magnitude of voltage detected is passed to MCU, judged by MCU process, result is passed to 433MHz radio circuit, send to card reader by radio circuit, then through card reader dissection process, then pass to host computer by 485 buses, thus make the electricity of card also can by Real-Time Monitoring, once find that card battery electricity is lower than preset value, changes battery, in time to ensure the normal use of card various functions.
Described warning/shielding button, can trigger alarm instruction, warning message is passed to MCU, after MCU dissection process, card reader is sent to by radio circuit, card reader processes by analysis and reports host computer, thus on host computer the alarm of display alarm card, and identification information and positional information; Button of reporting to the police/shield can trigger shielding trace instruction, shielding trace signals is passed to MCU, after MCU dissection process, card reader is sent to by radio circuit, card reader processes by analysis and reports host computer, after host computer receives the shielding tracked information of card, no longer continue the positional information of display card, but still can the warning message of receives both cards.
Described status indicator LED, can different conditions residing for card, makes the display with different characteristic.During as pushed for emergency, LED light will not stop flicker.
The utility model coordinates the card reader of particular type to realize following functions, will be described in detail below to each function.
1. triggered location function
As shown in Figure 2, certain model card reader trigger antenna signal (125KHz) coverage is supposed to be radius is the border circular areas (overlooking) of 5m (apart from adjustable).So, when card holder carry card enter in trigger pip coverage time, 125KHz antenna in card will receive trigger pip, receive the machine code of card reader simultaneously, now, MCU wakes up by wake-up circuit, and is integrated by the unique identification information of the machine code of card reader and card and send to card reader, card reader is by card recognition and be uploaded to host computer by 485 buses, thus obtains the positional information of card identification and holder.
2. positive location function
Positive location and card, with Fixed Time Interval, send the 433MHz signal carrying card image on one's own initiative, and this signal is used for the position determining holder in a big way, also for judging that whether card is online.When the distance of card and card reader is less than card reader readable distance, card image can be determined.The orientation range of positive location is large compared with triggered location, but comparatively triggered location is slightly low for precision.
3. pass in and out arbitration functions
When holder carries card from when passing through between different antenna coverage areas, the order that can be recognized by different antennae by card, judges direction of motion and the movement locus of holder, or enters certain region or leave certain region.As shown in Figure 3, when holder enters into B antenna coverage areas from A antenna coverage areas, card is first recognized by A antenna, then recognized by B antenna again, so can judge, holder's moving line moves to B antenna coverage areas from A antenna coverage areas, and namely card holder enters into corridor according to mobile alignment 1 from room A.In like manner, when card holder continues to move according to mobile alignment 2, so first card will be arrived by B antenna detection, is arrived again by C antenna detection, and last card is arrived by D antenna detection, so can judge that card holder has entered into room B.
4. follow the trail of function of shielding
When holder enters a certain specific region, or in a certain special time period, holder does not want to be tracked to, and so follows the trail of function of shielding and just can meet this requirement.As shown in Figure 4, shielding is triggered by button, MCU receives the trigger pip stopping following the trail of, MCU will produce the shielded signal stopping following the trail of, and sends to card reader, after card reader receives shielded signal by 433MHz radio circuit, the signal this being carried mask information is uploaded to host computer together with the identification information of card and positional information by 485 buses, host computer, through the identification to mask information, not in the positional information of this card of display, namely stops the tracking to card.
5. button warning function
Pushing for emergency when there is emergency case/shielding button, and label sends the alerting signal being different from signal at ordinary times with peak power, and with the flicker of red LED pilot lamp, and send, until staff removes alerting signal to on-the-spot always.Alerting signal can be received by card reader in a big way, thus can determine card identification and positional information on a monitor.
Claims (6)
1. a 125KHz low frequency triggers 433MHz warning and follows the trail of card, it is characterized in that, described warning is followed the trail of card and is comprised PCB substrate, described PCB substrate is provided with MCU control circuit, described MCU control circuit is connected to 433MHz RF transmit-receive circuit, 125KHz low frequency trigger circuit, enhancement mode feed circuit, voltage detecting circuit, warning/shielding button and status indicator LED, and described voltage detecting circuit is connected with described enhancement mode feed circuit.
2. 125KHz low frequency according to claim 1 triggers 433MHz warning and follows the trail of card, and it is characterized in that, it is 86 × 54 × 5mm that card size is followed the trail of in described warning, and card stock is ABS.
3. 125KHz low frequency according to claim 1 triggers 433MHz warning and follows the trail of card, and it is characterized in that, described PCB substrate is of a size of 45 × 31mm.
4. 125KHz low frequency according to claim 1 triggers 433MHz warning and follows the trail of card, it is characterized in that, described 433MHz RF transmit-receive circuit comprises signal processing circuit and carries 3D helical antenna with the plate be attached thereto.
5. 125KHz low frequency according to claim 1 triggers 433MHz warning and follows the trail of card, it is characterized in that, the two-way 125KHz directional induction antenna that described 125KHz low frequency trigger circuit comprise low frequency wake-up circuit and are attached thereto.
6. 125KHz low frequency according to claim 1 triggers 433MHz warning and follows the trail of card, it is characterized in that, described enhancement mode feed circuit adopt two-way parallel connection power supply feed circuit, and each road battery is the button-shaped lithium-manganese cell of 150mAh, ensure the lasting electric power supply reliably of integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420582067.6U CN204117181U (en) | 2014-10-10 | 2014-10-10 | 125KHz low frequency triggers 433MHz warning and follows the trail of card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420582067.6U CN204117181U (en) | 2014-10-10 | 2014-10-10 | 125KHz low frequency triggers 433MHz warning and follows the trail of card |
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| Publication Number | Publication Date |
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| CN204117181U true CN204117181U (en) | 2015-01-21 |
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| CN201420582067.6U Expired - Fee Related CN204117181U (en) | 2014-10-10 | 2014-10-10 | 125KHz low frequency triggers 433MHz warning and follows the trail of card |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108133251A (en) * | 2017-12-21 | 2018-06-08 | 重庆金鑫科技产业发展有限公司 | A kind of intelligent cards |
| CN110619697A (en) * | 2019-09-25 | 2019-12-27 | 天地（常州）自动化股份有限公司 | Well entry uniqueness detection device and detection method based on low-frequency triggering |
-
2014
- 2014-10-10 CN CN201420582067.6U patent/CN204117181U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108133251A (en) * | 2017-12-21 | 2018-06-08 | 重庆金鑫科技产业发展有限公司 | A kind of intelligent cards |
| CN110619697A (en) * | 2019-09-25 | 2019-12-27 | 天地（常州）自动化股份有限公司 | Well entry uniqueness detection device and detection method based on low-frequency triggering |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20191010 |