CN108280976A - Short-distance wireless reminder for things left - Google Patents
Short-distance wireless reminder for things left Download PDFInfo
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- CN108280976A CN108280976A CN201810218297.7A CN201810218297A CN108280976A CN 108280976 A CN108280976 A CN 108280976A CN 201810218297 A CN201810218297 A CN 201810218297A CN 108280976 A CN108280976 A CN 108280976A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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Abstract
The present invention relates to short-distance wireless reminder for things left, belong to field of communication technology；The short-distance wireless reminder for things left includes mainly signal projector and signal receiver, signal projector is after power switch connection, the radiofrequency signal of 25MHZ will be emitted around, and when signal projector and signal receiver are placed within 2~10 meters, receiver will not sounding, and do not interfered by any barrier；When signal projector is detached with signal receiver, at a distance of be more than setting apart from when, signal receiver will send out alarm sound, " article " is reminded to have disengaged from " sight " range of owner always, when again in transmitter setting range, receiver alarm can stop, and LED light is installed, the accurate direction of forgetting article is prompted with brightness, special standby for the child constantly moved is found, effect is preferable.
Description
Technical field
The present invention relates to fields of communication technology, specifically, more particularly to short-distance wireless reminder for things left.
Background technology
Cumbersome, the problem of causing the people criminal of being easy " temporary amnesia " of the accelerating rhythm of life and task；Such as：
Someone is taking a taxi or self driving, gets off when leaving, is easy the articles forgetting of oneself in the car；Careless parent usually with
The child of oneself scatters, or child is forgotten in somewhere.
And it is using more detector on the market at present：" metal class item detector ", " pyroscan " " surpass
Acoustic detector ", it is clear that they all have certain limitation, and " metal class item detector ", it can only detect metal；
" pyroscan " and " ultrasonic detector " is vulnerable to the interference of object and cannot effectively detect and be obscured by an object
" special article ".
Denomination of invention " short-distance wireless reminder for things left ", application No. is 201320134764.0, which includes：Wirelessly
Transmitting module, receiving module, main control module, acousto-optic reminding module, which is characterized in that wireless transmitter module and valuables or
Child puts together, and receiving module, main control module, acousto-optic reminding module are sequentially connected and combine, for receiving hair
Penetrate signal.When wireless receiving module can not detect transmitter transmission look for something signal when, main control module drive acousto-optic remind mould
The buzzer sounding and LED lighting of block, for prompting user's valuables or child to have disengaged from range of visibility, to effectively
Help people retrieve in time because for the moment carelessness caused by unnecessary loss.
The shortcoming of above-mentioned apparatus is cannot to search out to have lost, and the article of small volume.Due to not can determine that
The accurate location of article, even if buzzer can only determine the Position Approximate of the article if sounding and LED lighting do not glisten,
But the article of loss cannot be quickly found out；And when the child lost ceaselessly moves, finding also can be extremely inconvenient.
Invention content
In order to overcome the problems in background technology, the present invention to propose short-distance wireless reminder for things left, circuit structure letter
It is single, at low cost, small easy to carry, the radiofrequency signal of 25MHZ is emitted by transmitter, when distance is more than 2~10 meters, letter
The buzzer of number receiver is issued by continuous " alarm ", and careless person is reminded with this.
To achieve the goals above, the present invention realizes in the following way：
The short-distance wireless reminder for things left includes transmitter 1 and receiver 2；
Wherein, transmitter 1 is opened including transmitter via hook 11, transmitter telescopic antenna 12, power supply indicator 13, power supply
14, transmitter circuit board 15, transmitter battery case 16, card lacing film 17 are closed, the top of the transmitter 1 is provided with transmitter mistake
The top right side of hole hook 11, the transmitter 1 is transmitter telescopic antenna 12, and the front of transmitter 1 is provided with power supply and refers to
Show that lamp 26, transmitter 1 are internally provided with transmitter circuit board 15, transmitter battery case 16, transmitter battery case 16 is set to hair
The side of the downside of emitter circuit board 15, transmitter 1 is provided with transmitter power switch 14, and the back of transmitter 1 is provided with card
Lacing film, the radio transmitter 151 are set in transmitter circuit board 15；
Receiver 2 includes receiver via hook 21, buzzer generation mouth 22, acceptor circuit plate 23, receiver battery
Box 24, receiver telescopic antenna 25, power supply indicator 26, power switch 27,2 top of receiver, middle part are provided with and connect
Device via hook 21 is received, 2 top right side of receiver is provided with receiver telescopic antenna 25, and the surface of receiver 2 is provided with buzzing
Device sounding mouth 22, power supply indicator 26 are provided with acceptor circuit plate 23, receiver battery case 24, buzzer in receiver 2,
Buzzer generator 22 is set to buzzer and occurs at mouth, and receiver battery case 24 is set to the lower part of acceptor circuit plate 23,
The right side of receiver 2 is provided with receiver power supply switch 27, and the acceptor circuit 231 is set to acceptor circuit plate 23
On.
Radio transmitter 151 in transmitter 1 includes crystal oscillator, triode, capacitance, DC power supply, inductance coil, described
DC power supply be connected with the one end resistance R1, the one end capacitance C1, the one end inductance coil L1, the resistance R1 other ends and the one end crystal oscillator B,
The one end resistance R2, the base stage of triode VT9081 are connected, the capacitance C1 other ends and the crystal oscillator B other ends, triode VT9081 current collections
Extremely it is connected, the inductance coil L1 other ends are connected with the crystal oscillator B other ends, triode VT9018 collectors, the hair of triode VT9018
Emitter-base bandgap grading is connected with the one end resistance R3, the one end capacitance C2, and the resistance R2 other ends are connected simultaneously with the resistance R3 other ends, the capacitance C2 other ends
Ground connection, inductance coil L2 are oppositely arranged with inductance coil L1, and the one end inductance coil L2 ground connection, the other end is connected with emitter.
Acceptor circuit 231 in receiver 2 includes receiving tuned amplifier 2311, diode detector 2312, voltage
Amplifying circuit 2313, voltage compare warning circuit 2314；
It receives tuned amplifier 2311 and includes capacitance, resistance, triode, inductance, DC power supply, reception antenna and capacitance C1
One end is connected, and the capacitance C1 other ends are connected with DC power supply, DC power supply and the one end resistance R1, the one end variable capacitance C2, inductance
The one end coil L1 is connected, and the resistance R1 other ends are connected with the base stage of triode, the one end resistance R2, the variable capacitance C2 other ends, electricity
The sense coil L1 other ends are connected with the collector of triode, emitter and the one end resistance R3, one end phase of capacitance C5 of triode
Even, the resistance R2 other ends, the resistance R3 other ends, the capacitance C5 other ends are connected and are grounded；
Diode detector 2312 includes inductance, diode, capacitance, resistance, the inductance coil L1 of tuned amplifier and two
The inductance coil L2 of pole pipe wave detector is oppositely arranged, and one end of inductance coil L2 is connected with the one end diode VD, and diode VD is another
One end is connected with the one end capacitance C4, the one end resistance R4, the one end resistance R5, and the inductance coil L2 other ends are connected with the one end capacitance C3,
The one end capacitance C3 is connected and is grounded with the other end of capacitance C4, the resistance R4 other ends, the one end resistance R6；
2313 proportional amplifier of voltage amplifier circuit includes resistance and proportional amplifier, resistance R5 proportional amplifiers it is another
End is connected with proportional amplifier one end, and proportional amplifier DC power supply is connected with proportional amplifier one end, resistance R6 and can power transformation
It hinders Rf one end, proportional amplifier one end to be connected, proportional amplifier other end ground connection, variable resistance Rf resistance and proportional amplifier the
Three ends are connected；
Voltage compares warning circuit 2314, including 555 circuits, resistance, buzzer, DC power supply, proportional amplifier and electricity
Hinder R8 one end, 2 ports of 555 circuits are connected, 5 ports of 555 circuits are connected with one end of capacitance C6, the resistance R8 other ends and
1 port of 555 circuits, the other end of capacitance C6 are connected and are grounded, DC power supply and the one end resistance R7,4 ports of 555 circuits, 8
Port is connected, and the other end of resistance R7 is connected with 6 ports of 555 circuits, and 3 ports of 555 circuits are connected with buzzer, buzzer
The other end is grounded.
The reception tuned amplifier 2311, diode detector 2312, voltage amplifier circuit 2313, voltage compare report
Signal is connected alert circuit 2314 successively.
Further, described further includes LED light, and LED light is set on the outer housing of receiver 2, and the LED light
It is installed on voltage amplifier circuit 2313 and voltage compares between warning circuit 2314.
Beneficial effects of the present invention：Small, high sensitivity, easy to carry, transmitter and receiver of the invention need to match
It uses, the radiofrequency signal of 25MHZ is emitted by transmitter, signal receiver can send out buzzing when distance is more than 2~10m
Sound reminds careless person to forget article with this, achievees the purpose that remind carelessness person, and the accurate side for forgeing article is prompted with brightness
To special standby for the child constantly moved, effect is preferable.
Description of the drawings
Fig. 1 is the structural diagram of the present invention I；
Fig. 2 is the structural schematic diagram II of the present invention；
Fig. 3 is the structural schematic diagram III of the present invention；
Fig. 4 is the circuit structure block diagram of the present invention；
Fig. 5 is transmitter circuit structure chart；
Fig. 6 is acceptor circuit connection figure.
In figure, 1- transmitters；
11- transmitter vias hook, 12- transmitters telescopic antenna, 13- power supply indicators, 14- transmitter powers switch,
15- transmitter circuit boards, 16- transmitters battery case, 17- card lacing films；
151- radio transmitters；
2- receivers；
21- receiver vias hook, 22- buzzers generator, 23- acceptor circuits plate, 24- receivers battery case, 25-
Receiver telescopic antenna, 26- power supply indicators, 27- receiver power supplies switch；
231- acceptor circuits；
2311- receives tuned amplifier；2312- diode detectors；2313- voltage amplifier circuits；2314- voltages compare
Warning circuit.
Specific implementation mode
It is right below in conjunction with attached drawing in order to keep the purpose of the present invention, technical solution and advantageous effect clearer, clear
The preferred embodiment of the present invention is described in detail, to facilitate the technical staff to understand.
With reference to as shown in figures 1 to 6：
Embodiment 1：The embodiment described 1 is Fig. 1-4 structural schematic diagrams of the present invention,
The short-distance wireless reminder for things left includes transmitter 1 and receiver 2；
Wherein, transmitter 1 is opened including transmitter via hook 11, transmitter telescopic antenna 12, power supply indicator 13, power supply
14, transmitter circuit board 15, transmitter battery case 16, card lacing film 17 are closed, the top of the transmitter 1 is provided with transmitter mistake
Hole hook 11, via hook 11 provide the hole of mounting article, and it is to hang over valuables or child's body to be facilitated across this hole with filament
On.
The top right side of the transmitter 1 is transmitter telescopic antenna 12, and the effect of telescopic antenna 12 is enhancing signal
The front of emissive porwer, transmitter 1 is provided with power supply indicator 26, and the effect of power supply indicator 26, which is observation transmitter power, is
No unlatching, transmitter 1 are internally provided with transmitter circuit board 15, transmitter battery case 16, and transmitter battery case 16 is set to hair
The side of the downside of emitter circuit board 15, transmitter 1 is provided with transmitter power switch 14, and the back of transmitter 1 is provided with card
The effect of lacing film 17, card lacing film 17 is that convenient card is easily installed on valuables, and the radio transmitter 151 is set to
In transmitter circuit board 15.
Receiver 2 includes receiver via hook 21, buzzer generation mouth 22, acceptor circuit plate 23, receiver battery
Box 24, receiver telescopic antenna 25, power supply indicator 26, power switch 27,2 top of receiver, middle part are provided with and connect
Device via hook 21 is received, 2 top right side of receiver is provided with receiver telescopic antenna 25, and the surface of receiver 2 is provided with buzzing
Device sounding mouth 22, power supply indicator 26 are provided with acceptor circuit plate 23, receiver battery case 24, buzzer in receiver 2,
Buzzer occurs mouth 22 with buzzer and is correspondingly arranged, and receiver battery case 25 is set to the lower part of acceptor circuit plate 23, receives
The right side of device 2 is provided with receiver power supply switch 27, and the acceptor circuit 231 is set on acceptor circuit plate 23.
Embodiment 2：
The short-distance wireless reminder for things left includes transmitter 1 and receiver 2；
Wherein, transmitter 1 is opened including transmitter via hook 11, transmitter telescopic antenna 12, power supply indicator 13, power supply
14, transmitter circuit board 15, transmitter battery case 16, card lacing film 17 are closed, the top of the transmitter 1 is provided with transmitter mistake
Hole hook 11, via hook 11 provide the hole of mounting article, and it is to hang over valuables or child's body to be facilitated across this hole with filament
On.
The top right side of the transmitter 1 is transmitter telescopic antenna 12, and the effect of telescopic antenna 12 is enhancing signal
The front of emissive porwer, transmitter 1 is provided with power supply indicator 26, and the effect of power supply indicator 26, which is observation transmitter power, is
No unlatching, transmitter 1 are internally provided with transmitter circuit board 15, transmitter battery case 16, and transmitter battery case 16 is set to hair
The side of the downside of emitter circuit board 15, transmitter 1 is provided with transmitter power switch 14, and the back of transmitter 1 is provided with card
The effect of lacing film 17, card lacing film 17 is that convenient card is easily installed on valuables, and the radio transmitter 151 is set to
In transmitter circuit board 15.
Receiver 2 includes receiver via hook 21, buzzer generation mouth 22, acceptor circuit plate 23, receiver battery
Box 24, receiver telescopic antenna 25, power supply indicator 26, power switch 27,2 top of receiver, middle part are provided with and connect
Device via hook 21 is received, 2 top right side of receiver is provided with receiver telescopic antenna 25, and the surface of receiver 2 is provided with buzzing
Device sounding mouth 22, power supply indicator 26 are provided with acceptor circuit plate 23, receiver battery case 24, buzzer in receiver 2,
Buzzer, which is set to, to be occurred with buzzer at mouth 22, and receiver battery case 25 is set to the lower part of acceptor circuit plate 23, receives
The right side of device 2 is provided with receiver power supply switch 27, and the acceptor circuit 231 is set on acceptor circuit plate 23.
The radio transmitter 151, effect be emit the radiofrequency signal of 25MHZ around by antenna, including
Crystal oscillator, triode, capacitance, DC power supply, inductance coil, the DC power supply and the one end resistance R1, the one end capacitance C1, inductance
The one end coil L1 is connected, and the resistance R1 other ends are connected with the base stage of the one end crystal oscillator B, the one end resistance R2, triode VT9081, capacitance
The C1 other ends are connected with the crystal oscillator B other ends, triode VT9081 collectors, the inductance coil L1 other ends and the crystal oscillator B other ends, three
Pole pipe VT9018 collectors are connected, and the emitter of triode VT9018 is connected with the one end resistance R3, the one end capacitance C2, and resistance R2 is another
One end is connected and is grounded with the resistance R3 other ends, the capacitance C2 other ends, and inductance coil L2 is oppositely arranged with inductance coil L1, inductance
The one end coil L2 is grounded, and the other end is connected with emitter.
The reception tuned amplifier 2311, diode detector 2312, voltage amplifier circuit 2313, voltage compare report
Signal is connected alert circuit 2314 successively.
Further, described further includes LED light, and LED light is set on the outer housing of receiver, and the LED light
It is installed on voltage amplifier circuit 2313 and voltage compares between warning circuit 2314.
Embodiment 3：
The short-distance wireless reminder for things left includes transmitter 1 and receiver 2；
Wherein, transmitter 1 is opened including transmitter via hook 11, transmitter telescopic antenna 12, power supply indicator 13, power supply
14, transmitter circuit board 15, transmitter battery case 16, card lacing film 17 are closed, the top of the transmitter 1 is provided with transmitter mistake
The effect of hole hook 11, via hook 11 is to provide a mount hole, facilitated across this hole with filament be hang over valuables or
With child.
The top right side of the transmitter 1 is transmitter telescopic antenna 12, and the effect of telescopic antenna 12 is enhancing signal
The front of emissive porwer, transmitter 1 is provided with power supply indicator 26, and the effect of power supply indicator 26, which is to look at transmitter power, is
No unlatching, transmitter 1 are internally provided with transmitter circuit board 15, transmitter battery case 16, and transmitter battery case 16 is set to hair
The side of the downside of emitter circuit board 15, transmitter 1 is provided with transmitter power switch 14, and the back of transmitter 1 is provided with card
The effect of lacing film 17, card lacing film 17 is that convenient card is easily installed on valuables, and the radio transmitter 151 is set to
In transmitter circuit board 15, all components are installed on circuit boards and are fixed in built-in launch-box, and stable penetrate is sent out
Frequency signal, and it is not easily damaged.
Receiver 2 includes receiver via hook 21, buzzer generation mouth 22, acceptor circuit plate 23, receiver battery
Box 24, receiver telescopic antenna 25, power supply indicator 26, power switch 27,2 top of receiver, middle part are provided with and connect
Device via hook 21 is received, 2 top right side of receiver is provided with receiver telescopic antenna 25, and the surface of receiver 2 is provided with buzzing
Device sounding mouth 22, power supply indicator 26 are provided with acceptor circuit plate 23, receiver battery case 24, buzzer in receiver 2,
Buzzer is set to buzzer and occurs at mouth 22, and receiver battery case 24 is set to the lower part of acceptor circuit plate 23, receiver 2
Right side be provided with receiver power supply switch 27, the acceptor circuit 231 is set on acceptor circuit plate 23, effect
It is permanent circuit, keeps it not easily damaged, and can reliable and stable reception signal.
The radio transmitter 151, effect are exactly to emit the radiofrequency signal of 25MHZ around by antenna；Packet
Include crystal oscillator, triode, capacitance, DC power supply, inductance coil, the DC power supply and the one end resistance R1, the one end capacitance C1, electricity
Feel the one end coil L1 to be connected, the resistance R1 other ends are connected with the base stage of the one end crystal oscillator B, the one end resistance R2, triode VT9081, electricity
Hold the C1 other ends with the crystal oscillator B other ends, triode VT9081 collectors to be connected, the inductance coil L1 other ends and the crystal oscillator B other ends,
Triode VT9018 collectors are connected, and the emitter of triode VT9018 is connected with the one end resistance R3, the one end capacitance C2, resistance R2
The other end is connected and is grounded with the resistance R3 other ends, the capacitance C2 other ends, and inductance coil L2 is oppositely arranged with inductance coil L1, electricity
Feel the one end coil L2 ground connection, the other end is connected with emitter.
The acceptor circuit 231 includes receiving tuned amplifier 2311, diode detector 2312, voltage amplification electricity
Warning circuit 2314 is compared on road 2313, voltage.
Tuned amplifier 2311 is received, effect is only to be amplified to the radiofrequency signal of 25MHZ；Including capacitance, resistance,
Triode, inductance, DC power supply, reception antenna are connected with the one end capacitance C1, and the capacitance C1 other ends are connected with DC power supply, direct current
Power supply is connected with the one end resistance R1, the one end variable capacitance C2, the one end inductance coil L1, the base of the resistance R1 other ends and triode
Pole, the one end resistance R2 are connected, and the variable capacitance C2 other ends, the inductance coil L1 other ends are connected with the collector of triode, three poles
The emitter of pipe is connected with one end of the one end resistance R3, capacitance C5, and the resistance R2 other ends, the resistance R3 other ends, capacitance C5 are another
End is connected and is grounded.
Diode detector 2312, effect is that high frequency electrical signal is converted into direct current weak electric signal；Including inductance, two poles
Pipe, capacitance, resistance, the inductance coil L1 of tuned amplifier and the inductance coil L2 of diode detector are oppositely arranged, inductor wire
One end of circle L2 is connected with the one end diode VD, the diode VD other ends and the one end capacitance C4, the one end resistance R4, the one end resistance R5
It is connected, the inductance coil L2 other ends are connected with the one end capacitance C3, and the one end capacitance C3 and the other end, the resistance R4 of capacitance C4 are another
End, the one end resistance R6 are connected and are grounded.
Voltage amplifier circuit 2313, effect are that direct current weak electric signal is carried out ratio enlargement；Proportional amplifier includes electricity
Resistance and proportional amplifier, the other end of resistance R5 proportional amplifiers are connected with proportional amplifier one end, proportional amplifier direct current
Source is connected with proportional amplifier one end, and resistance R6 is connected with the one end variable resistance Rf, proportional amplifier one end, and proportional amplifier is another
One end is grounded, and variable resistance Rf resistance is connected with proportional amplifier third end.
Voltage compares warning circuit 2314, and effect is the ginseng for the DC voltage and circuit configuration for amplifying voltage amplifier
It examines threshold voltage to be compared, to export high level or low level in output end and buzzer is driven to send out alarm and luminous two
Pole tube light-emitting；Including 555 circuits, resistance, buzzer, DC power supply, proportional amplifier and the one end resistance R8,2 ends of 555 circuits
Mouthful it is connected, 5 ports of 555 circuits are connected with one end of capacitance C6,1 port of the resistance R8 other ends and 555 circuits, capacitance C6
The other end is connected and is grounded, and DC power supply is connected with the one end resistance R7,4 ports of 555 circuits, 8 ports, the other end of resistance R7
It is connected with 6 ports of 555 circuits, 3 ports of 555 circuits are connected with buzzer, buzzer other end ground connection.
The reception tuned amplifier 2311, diode detector 2312, voltage amplifier circuit 2313, voltage compare report
Signal is connected alert circuit 2314 successively.
The output end of voltage amplifier circuit 2313 in receiving circuit 231 concatenates a LED light emitting diode and voltage
Compare warning circuit 2314 to be connected, the brightness to shine by it is come the accurate active position for judging remains and receiver；
When receiver is closer to remains, LED light will be brighter, conversely, darker at a distance of remoter LED light.
The course of work of the present invention：
After " transmitter " that opens power supply instruction is hung on valuables or child, then by " receiver " of pairing
Be worn on hand or on neck of owner, while also to turn on the power switch, at this point, article or child and owner at a distance of 2~
When in 10 meters of radius, the alarm of owner on hand will not " sound ", only after departing from the distance of setting, alarm is with regard to one
Directly " sound ", after owner is again adjacent to find article or child, the alarm in owner's hand just stops sounding.
The transmitter and receiver must match use, i.e. receiver can only send out transmitter the radiofrequency signal of 25MHZ
Effectively receive and amplify, the signal of remaining frequency range has apparent inhibiting effect.
The present invention is not sounding when detection receives signal, sounding when not detecting signal or weak output signal.
Effective alarm distance " predetermined value " between transmitter and receiver can be adjusted within the scope of 2~10 meters, be adjusted
Adjusting method is：The resistance Rf in acceptor circuit 2313 is adjusted, when increasing Rf, receiving distance can increase；When reducing Rf, connect
Receiving distance will be reduced, to realize effective adjusting in 2~10 meters of alarm distance of separation.
It is communicated since transmitter and receiver are the radio frequency signals of the 25MHZ used, emitter antenna
12 and receiver antenna 25 directive property docking collect mail number power be to have a certain impact, when opposite direction, receive
Signal is just eager to excel, conversely, signal will be weakened；In this way can by rotate receiver antenna direction and alarm come
There is being drawn close to " remains " for target, so that the alarm signal that receiver is sent out is stopped as early as possible, and be serially connected in voltage amplification
The output end of circuit 2313 can judge orientation, for finding the child of continuous motion direction by observing the power that LED light shines
It is with strong applicability.
Since the transmitter and receiver are used by wireless telecommunications and pairing, so not blocked by any barrier
And interference, the 25MHZ homogenous frequency signals that can be only sent out by other articles interfere, overcome use " pyroscan " and
" ultrasonic detector " is easy to be interfered and cannot effectively detect the defect of article.
The function of transmitter is：As long as soon as power switch is connected, transmitter emits the radiofrequency signal of 25MHZ around.
The function of receiver is：It and transmitter pairing use, the radio signal sent out for receiving transmitter, when receiver and hair
After emitter separation is more than 2~10 meters " predetermined value ", the buzzer of receiver will just be sent out continuous " alarm "；Two articles are small
In the range of setting, " alarm " of receiver can disappear.
Finally illustrate, the above is the preferred embodiment of the present invention, although by above preferred embodiment,
Through invention is explained in detail, however, those skilled in the art should understand that, can be in the form and details to it
It is variously modified, without departing from the range required by claims of the present invention.
Claims (4)
1. short-distance wireless reminder for things left, it is characterised in that：The short-distance wireless reminder for things left includes transmitter (1)
With receiver (2)；
Wherein, transmitter (1) includes transmitter via hook (11), transmitter telescopic antenna (12), power supply indicator (13), electricity
Source switch (14), transmitter circuit board (15), transmitter battery case (16), card lacing film (17)；
Transmitter via hook (11) is provided at the top of the transmitter (1), the top right side of the transmitter (1) is
The front of transmitter telescopic antenna (12), transmitter (1) is provided with power supply indicator (26), and transmitter (1) is internally provided with hair
Emitter circuit board (15), transmitter battery case (16), transmitter battery case (16) are set to the downside of transmitter circuit board (15),
The side of transmitter (1) is provided with transmitter power switch (14), and the back of transmitter (1) is provided with card lacing film (17), described
Radio transmitter (151) be set in transmitter circuit board (15)；
Receiver (2) includes receiver via hook (21), buzzer generation mouth (22), acceptor circuit plate (23), receiver
Battery case (24), receiver telescopic antenna (25), power supply indicator (26), power switch (27)；
At the top of the receiver (2), middle part be provided with receiver via hook (21), receiver (2) top right side is provided with
The surface of receiver telescopic antenna (25), receiver (2) is provided with buzzer sounding mouth (22), power supply indicator (26), receives
It is provided with acceptor circuit plate (23), receiver battery case (24), buzzer in device (2), buzzer is set to buzzer
At mouth (22), receiver battery case (24) is set to the lower part of acceptor circuit plate (23), is provided with and connects on the right side of receiver (2)
Appliance mains switch (27) is received, the acceptor circuit (231) is set on acceptor circuit plate (23).
2. short-distance wireless reminder for things left according to claim 1, it is characterised in that：The radio transmitter
(151) include crystal oscillator, triode, capacitance, DC power supply, inductance coil, the DC power supply and the one end resistance R1, capacitance C1
One end, the one end inductance coil L1 are connected, the resistance R1 other ends and the one end crystal oscillator B, the one end resistance R2, triode VT9081 base stage
It is connected, the capacitance C1 other ends are connected with the crystal oscillator B other ends, triode VT9081 collectors, the inductance coil L1 other ends and crystal oscillator B
The other end, triode VT9018 collectors are connected, emitter and the one end resistance R3, the one end the capacitance C2 phase of triode VT9018
Even, the resistance R2 other ends are connected and are grounded with the resistance R3 other ends, the capacitance C2 other ends, inductance coil L2 and inductance coil L1 phases
To setting, the one end inductance coil L2 ground connection, the other end is connected with emitter.
3. short-distance wireless reminder for things left according to claim 1, it is characterised in that：The acceptor circuit
(231) include receiving tuned amplifier (2311), diode detector (2312), voltage amplifier circuit (2313), voltage to compare
Warning circuit (2314)；
It includes capacitance, resistance, triode, inductance, DC power supply to receive tuned amplifier (2311), reception antenna and capacitance C1 mono-
End is connected, and the capacitance C1 other ends are connected with DC power supply, DC power supply and the one end resistance R1, the one end variable capacitance C2, inductor wire
It encloses the one end L1 to be connected, the resistance R1 other ends are connected with the base stage of triode, the one end resistance R2, the variable capacitance C2 other ends, inductance
The coil L1 other ends are connected with the collector of triode, and the emitter of triode is connected with one end of the one end resistance R3, capacitance C5,
The resistance R2 other ends, the resistance R3 other ends, the capacitance C5 other ends are connected and are grounded；
Diode detector (2312) includes inductance, diode, capacitance, resistance, the inductance coil L1 of tuned amplifier and two poles
The inductance coil L2 of pipe wave detector is oppositely arranged, and one end of inductance coil L2 is connected with the one end diode VD, and diode VD is another
End is connected with the one end capacitance C4, the one end resistance R4, the one end resistance R5, and the inductance coil L2 other ends are connected with the one end capacitance C3, electricity
Hold the one end C3 to be connected and be grounded with the other end of capacitance C4, the resistance R4 other ends, the one end resistance R6；
Voltage amplifier circuit (2313) includes resistance and proportional amplifier, the other end and the proportional amplifier one end phase of resistance R5
Even, DC power supply is connected with proportional amplifier one end, and resistance R6 is connected with the one end variable resistance Rf, proportional amplifier one end, than
Example amplifier other end ground connection, variable resistance Rf resistance are connected with proportional amplifier third end；
Voltage compares warning circuit (2314), including 555 circuits, resistance, buzzer, DC power supply, proportional amplifier and resistance
The one end R8,2 ports of 555 circuits are connected, and 5 ports of 555 circuits are connected with one end of capacitance C6, the resistance R8 other ends and 555
1 port of circuit, the other end of capacitance C6 are connected and are grounded, DC power supply and the one end resistance R7,4 ports of 555 circuits, 8 ends
Mouth is connected, and the other end of resistance R7 is connected with 6 ports of 555 circuits, and 3 ports of 555 circuits are connected with buzzer, and buzzer is another
One end is grounded；
The reception tuned amplifier (2311), diode detector (2312), voltage amplifier circuit (2313), voltage compare
Signal is connected warning circuit (2314) successively.
4. short-distance wireless reminder for things left according to claim 1 or 3, which is characterized in that described further includes LED
Lamp, LED light are set on the outer housing of receiver (2), and the LED light is installed on voltage amplifier circuit (2313) and voltage
Compare between warning circuit (2314).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810218297.7A CN108280976A (en) | 2018-03-16 | 2018-03-16 | Short-distance wireless reminder for things left |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810218297.7A CN108280976A (en) | 2018-03-16 | 2018-03-16 | Short-distance wireless reminder for things left |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108280976A true CN108280976A (en) | 2018-07-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810218297.7A Pending CN108280976A (en) | 2018-03-16 | 2018-03-16 | Short-distance wireless reminder for things left |
Country Status (1)
| Country | Link |
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| CN (1) | CN108280976A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2153099Y (en) * | 1993-05-21 | 1994-01-12 | 西南交通大学 | Wireless remote control pocket alarm for preventing theft and losing |
| JP2007180936A (en) * | 2005-12-28 | 2007-07-12 | Aruze Corp | Lost article discovery unit |
| CN201051284Y (en) * | 2007-06-29 | 2008-04-23 | 胡益豪 | Loss and theft prevention announciator for accompanied materials |
| CN102360069A (en) * | 2011-07-22 | 2012-02-22 | 周芃 | Wireless signal intensity induction object searching positioner |
| CN106067762A (en) * | 2016-06-15 | 2016-11-02 | 泰凌微电子（上海）有限公司 | The crystal-oscillator circuit of fast start-up |
| CN207218676U (en) * | 2017-07-25 | 2018-04-10 | 深圳市金西瑞电子有限公司 | A kind of low-voltage high-power radio transmitter |
-
2018
- 2018-03-16 CN CN201810218297.7A patent/CN108280976A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2153099Y (en) * | 1993-05-21 | 1994-01-12 | 西南交通大学 | Wireless remote control pocket alarm for preventing theft and losing |
| JP2007180936A (en) * | 2005-12-28 | 2007-07-12 | Aruze Corp | Lost article discovery unit |
| CN201051284Y (en) * | 2007-06-29 | 2008-04-23 | 胡益豪 | Loss and theft prevention announciator for accompanied materials |
| CN102360069A (en) * | 2011-07-22 | 2012-02-22 | 周芃 | Wireless signal intensity induction object searching positioner |
| CN106067762A (en) * | 2016-06-15 | 2016-11-02 | 泰凌微电子（上海）有限公司 | The crystal-oscillator circuit of fast start-up |
| CN207218676U (en) * | 2017-07-25 | 2018-04-10 | 深圳市金西瑞电子有限公司 | A kind of low-voltage high-power radio transmitter |
Non-Patent Citations (4)
| Title |
|---|
| 余江: "遗物提醒器的系统设计与实现", 《科技创新与应用》 * |
| 刘建清: "《从零开始学习模拟电子技术》", 31 January 2007, 国防工业出版社 * |
| 吴莘: "《高频电子线路》", 31 August 2016, 北京理工大学出版社 * |
| 王冬霞: "《电子与通信工程专业基础实验教程》", 31 July 2014, 东北大学出版社 * |
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Application publication date: 20180713 |
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| RJ01 | Rejection of invention patent application after publication |