CN205451420U - Wirelessly prevent losing USB flash disk - Google Patents
Wirelessly prevent losing USB flash disk Download PDFInfo
- Publication number
- CN205451420U CN205451420U CN201620241593.5U CN201620241593U CN205451420U CN 205451420 U CN205451420 U CN 205451420U CN 201620241593 U CN201620241593 U CN 201620241593U CN 205451420 U CN205451420 U CN 205451420U
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- usb flash
- flash disk
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- wireless
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Abstract
The utility model provides a wirelessly prevent losing USB flash disk, includes USB flash disk body and portable ware, this internal emitter that is equipped with of USB flash disk is equipped with the receiving arrangement with the wireless matching of emitter in the portable ware, the wireless transmitting module among the emitter wherein, the input links to each other with the output of first control ware, and a power end and a power module link to each other, and the output links to each other with first antenna, wireless receiving module among the receiving arrangement, input and second antenna link to each other, and power end and the 2nd power module link to each other, and output and the second controllor's input links to each other, the second controllor's output links to each other with alarm module's input, combine USB flash disk and wireless technology and chip control technique, the size of warning distance and chimes of doom is all adjustable, convenient and practical, portable ware is hand -carried, solves the USB flash disk in essence and stays and forget the problem of pulling out away on the computer, wireless transmitting module need not not establish the power by the power supply of USB flash disk male equipment in addition, makes USB flash disk simple structure appearance small and exquisite.
Description
Technical field
This utility model belongs to wireless electron and controls product scope, is specifically related to a kind of wireless anti-lost USB flash disk.
Background technology
In life, people often need to carry or reprint some important e-files, and the appearance of USB flash disk is very easy to our live and work.But owing to usually forgetting to pull out away after using USB flash disk outside, leaving the capsule information file inside USB flash disk in and disappear suddenly the most therewith, USB flash disk is easily lost and also brings inconvenience to user.Basically less than the appearance of anti-lost USB flash disk the most truly on current market; occur that most is USB flash disk anti-lost protection set; be similar to not with key chain; simply solve anti-lost problem when USB flash disk is taken with oneself; and the most more situation is after user uses USB flash disk; the loss problem forgetting when leaving to pull out away and cause, so the anti-lost product of this type of USB flash disk substantially can not solve USB flash disk and stay the problem forgetting on host computer to pull out away.
Utility model content
This utility model solves the problem in that providing a kind of is automatically reminded to the anti-wireless anti-lost USB flash disk forgotten.
Concrete technical scheme is as follows:
A kind of wireless anti-lost USB flash disk, including USB flash disk body and portable device, it it is critical only that: described USB flash disk is the most internal is provided with discharger (1), is provided with and described discharger (1) wireless profile receives device (2) in described portable device；
Wherein said discharger (1) includes wireless transmitter module, and the input of this wireless transmitter module and the outfan of the first controller are connected, and power end and the first power module are connected, and outfan is connected with first antenna；
Described reception device (2) includes wireless receiving module, and the input of this wireless receiving module and the second antenna are connected, and power end is connected with second source module, and outfan is connected with the input of second controller；The outfan of described second controller is connected with the input of alarm module.
The principle of this technical scheme: integrated wireless transmitter module in common U disk, with the binding realized and between wireless receiving module；Being sent coding when normal work by the first controller, wireless transmitter module sends wireless signal by first antenna；Wireless receiving module receives signal by the second antenna, and signal is delivered to second controller, and this signal is decoded by second controller, if second controller does not receives signal, or judges that the Signal coding received is incorrect, makes alarm module action.
For this utility model is better achieved, may further be:
Described second source module includes power supply chip U10, and the input of this power supply chip U10 is connected with button cell, and outfan is connected with the power end of described wireless receiving module；Wherein, the input of described power supply chip U10 is connected with electric capacity C30 and C31 one end the most respectively, described electric capacity C30 and the equal ground connection of the C31 other end；The outfan of described power supply chip U10 is connected with electric capacity C32 and C33 one end the most respectively, described electric capacity C32 and the equal ground connection of the C33 other end, owing to the running voltage of second controller is 3.8V～5.5V, and the running voltage of wireless receiving module is 1.9V～3.6V, so the effect of second source module starting voltage conversion；
Described wireless transmitter module and wireless receiving module are nRF24L01 chip, and the ANT2 pin of this nRF24L01 chip is connected with antenna E1 after being sequentially connected in series inductance L3 and electric capacity C6, ground connection after described antenna E1 series capacitance C5.
Described alarm module is sound and light alarm module, and sound and light alarm module reminds effect more preferable；
Described first power module is the equipment that described USB flash disk body inserts, USB port is 5V unidirectional current, and inside USB flash disk, have reduction voltage circuit, USB flash disk real work voltage is 3.3V, solve the powerup issue of the first controller and wireless receiving module, so, battery need not be set inside USB flash disk, saved design space of the present utility model.
The beneficial effects of the utility model: be combined with wireless technology and chip controls technology by USB flash disk, the equal scalable of size of alarm distance and chimes of doom, the design of hommization is convenient and practical；Portable device is carried with, and substantially solves USB flash disk and stays the problem forgetting on host computer to pull out away；And wireless transmitter module is inserted equipment by USB flash disk and powers, need not separately set power supply, make USB flash disk simple in construction, low-profile.
Accompanying drawing explanation
Fig. 1 is a kind of wireless anti-lost USB flash disk structured flowchart；
Fig. 2 is the structured flowchart of wireless transmitter module and wireless receiving module；
Fig. 3 is SM1117 voltage conversion circuit figure in a kind of wireless anti-lost USB flash disk；
Fig. 4 is the external circuit design circuit diagram of nRF24L01 in a kind of wireless anti-lost USB flash disk.
Detailed description of the invention
Below in conjunction with the accompanying drawings preferred embodiment of the present utility model is described in detail, so that advantage of the present utility model and feature can be easier to be readily appreciated by one skilled in the art, thus protection domain of the present utility model is made apparent clear and definite defining.
As shown in Figure 1: a kind of wireless anti-lost USB flash disk, including USB flash disk body and portable device, USB flash disk is the most internal is provided with discharger 1, is provided with and discharger 1 wireless profile receives device 2 in portable device；
Wherein discharger 1 includes wireless transmitter module, and the input of wireless transmitter module and the outfan of the first controller are connected, and power end and the first power module are connected, and outfan is connected with first antenna；
Receiving device 2 and include wireless receiving module, the input of wireless receiving module and the second antenna are connected, and power end is connected with second source module, and outfan is connected with the input of second controller；The outfan of second controller is connected with the input of alarm module.
As shown in Figure 2: the nRF24L01 chip in discharger 1 is wireless transmitter module, STC89C52 single-chip microcomputer is the first controller, when USB flash disk body inserts the USB interface of host computer, and this USB interface is directly powered for USB flash disk body, becomes the first power module of discharger 1 simultaneously；The input of wireless transmitter module and the outfan of the first controller are connected, and power end is connected by the intrinsic reduction voltage circuit of USB flash disk and the first power module, and outfan is connected with first antenna；
In described reception device 2, another nRF24L01 chip is wireless receiving module, and another block STC89C52 single-chip microcomputer is second controller, and SM117 chip is second source module, and sound and light alarm module is alarm module；The input of wireless receiving module and the second antenna are connected, and power end is connected with second source module, and outfan is connected with the input of second controller；The outfan of second controller is connected with the input of alarm module.
As shown in Figure 3: the input of power supply chip SM117 is connected with button cell, outfan is connected with the power end of described wireless receiving module；Wherein, the input of described power supply chip SM117 is connected with electric capacity C30 and C31 one end respectively, described electric capacity C30 and the equal ground connection of the C31 other end；The outfan of power supply chip SM117 is connected with electric capacity C32 and C33 one end respectively, electric capacity C32 and the equal ground connection of the C33 other end.
As shown in Figure 4: the ANT2 pin of nRF24L01 chip is connected with antenna E1 after being sequentially connected in series inductance L3 and electric capacity C6, ground connection after antenna E1 series capacitance C5, electric capacity C6 is connected between electric capacity C5 and electric wire E1.
This utility model is so work:
STC89C52 single-chip microcomputer running voltage of the present utility model is 3.8V～5.5V, and the running voltage of nRF24L01 chip is 1.9V～3.6V.Discharger 1 and USB flash disk share power supply, and USB port is 5V unidirectional current, and USB flash disk real work voltage is 3.3V.Have inside USB flash disk reduction voltage circuit (i.e. voltage stabilizing IC, also known as LDO, its input 5V, export 3.3V).Receiving device uses 5V button cell to power, it is therefore desirable to has reduction voltage circuit to provide the running voltage (1.9V～3.6V) of nRF24L01 chip, is designed with SM1117 chip to realize the conversion of voltage；
NRF24L01 with STC89C52 uses SPI interface mode to communicate, and STC89C52 can use GPIO simulation SPI interface work schedule or SPI controller two ways to control radio frequency chip.The design selects the mode of GPIO simulation SPI interface to control nRF24L01 radio frequency chip, in this programme, only uses six pins of CSN, SCK, MISO, MOSI, IRQ and CE of nRF24L01；
There is automatic gain control function inside nRF24L01, a suitable power can be set to launch data, on the one hand can reduce energy consumption, on the other hand realize the control to communication distance.Such as require can communicate in 2 meters, but the communication distance of nRF24L01 maximum can reach rice up to a hundred, it is obviously desirable to fall is launched power and reduced communication distance.And can also dynamically change this performance number in communication process, to reach the effect most preferably mated.
The emission process of discharger 1 is such, nRF24L01 chip controls its mode of operation by arranging the level of PWR_UP position and PRIM_RX position and CE pin in configuration register, PWR_UP is set high by MCU, nRF24L01 is made to enter mode of operation, nRF24L01 is sent into by SPI mouth chronologically in the address of receiver and data to be sent, it is reconfigured at CONFIG depositor (single-chip microcomputer sets high at least 10us CE pin simultaneously), feed them into sending mode, and select its transmitting power, excite wireless transmit chip, its emission process is for power to radio-frequency front-end, rf data packing (adds prefix, CRC check code), transmitted at high speed packet, after transmitting completes, chip enters holding state.For the first time after successful launch, at regular intervals, wireless transmitter module will launch initial data again.
The reception process receiving device 2 is such, configuration the machine address and data package size to be received, and configures CONFIG depositor, feeds them into reception pattern, CE pin is set high, and wireless receiving chip enters monitored state afterwards, waits the arrival of packet.When receiving correct packet (correct address and CRC check code), receiving chip and automatically prefix, address and CRC check displacement are gone, and notify single-chip microcomputer, single-chip microcomputer reads data, and the buzzer of the LED in sound and light alarm module is all failure to actuate.If not receiving just data, the single-chip microcomputer received in device 2 judges, and the distance of discharger 1 and reception device 2 is beyond safety range, and makes buzzer warning and LED flicker.
Claims (5)
1. a wireless anti-lost USB flash disk, including USB flash disk body and portable device, it is characterised in that: described USB flash disk is the most internal is provided with discharger (1), is provided with and described discharger (1) wireless profile receives device (2) in described portable device；
Wherein said discharger (1) includes wireless transmitter module, and the input of this wireless transmitter module and the outfan of the first controller are connected, and power end and the first power module are connected, and outfan is connected with first antenna；
Described reception device (2) includes wireless receiving module, and the input of this wireless receiving module and the second antenna are connected, and power end is connected with second source module, and outfan is connected with the input of second controller；The outfan of described second controller is connected with the input of alarm module.
A kind of wireless anti-lost USB flash disk, it is characterised in that: described second source module includes power supply chip U10, and the input of this power supply chip U10 is connected with button cell, and outfan is connected with the power end of described wireless receiving module；
Wherein, the input of described power supply chip U10 is connected with electric capacity C30 and C31 one end the most respectively, described electric capacity C30 and the equal ground connection of the C31 other end；
The outfan of described power supply chip U10 is connected with electric capacity C32 and C33 one end the most respectively, described electric capacity C32 and the equal ground connection of the C33 other end.
A kind of wireless anti-lost USB flash disk, it is characterized in that: described wireless transmitter module and wireless receiving module are nRF24L01 chip, the ANT2 pin of this nRF24L01 chip is connected with antenna E1 after being sequentially connected in series inductance L3 and electric capacity C6, ground connection after described antenna E1 series capacitance C5.
A kind of wireless anti-lost USB flash disk, it is characterised in that: described alarm module is sound and light alarm module.
A kind of wireless anti-lost USB flash disk, it is characterised in that: described first power module is the equipment that described USB flash disk body inserts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620241593.5U CN205451420U (en) | 2016-03-28 | 2016-03-28 | Wirelessly prevent losing USB flash disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620241593.5U CN205451420U (en) | 2016-03-28 | 2016-03-28 | Wirelessly prevent losing USB flash disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205451420U true CN205451420U (en) | 2016-08-10 |
Family
ID=56574557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620241593.5U Expired - Fee Related CN205451420U (en) | 2016-03-28 | 2016-03-28 | Wirelessly prevent losing USB flash disk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205451420U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110363969A (en) * | 2018-04-11 | 2019-10-22 | 山东商务职业学院 | A kind of flash disk warning device for classroom multimedia platform |
-
2016
- 2016-03-28 CN CN201620241593.5U patent/CN205451420U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110363969A (en) * | 2018-04-11 | 2019-10-22 | 山东商务职业学院 | A kind of flash disk warning device for classroom multimedia platform |
| CN110363969B (en) * | 2018-04-11 | 2021-06-22 | 山东商务职业学院 | USB flash disk alarm device for classroom multimedia platform |
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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: 20160810 Termination date: 20170328 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |