CN204045005U - The remote-control receiving circuit of two change code - Google Patents
The remote-control receiving circuit of two change code Download PDFInfo
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- CN204045005U CN204045005U CN201420554403.6U CN201420554403U CN204045005U CN 204045005 U CN204045005 U CN 204045005U CN 201420554403 U CN201420554403 U CN 201420554403U CN 204045005 U CN204045005 U CN 204045005U
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Abstract
The remote-control receiving circuit of two change code, belong to telecontrol engineering field, in order to thoroughly change a kind of New Measure that the cracking ability of tri-state coding proposes, by radio frequency reception demodulator circuit, dicode variation unit, interlocking unit, performance element, decoding block forms jointly launches with change code the change code receiving circuit matched, the output of radio frequency reception demodulator circuit connects the input of decoding block, decoding block has four outputs, with dicode change that the input of unit connects for become code control end, what connect with performance element is last output terminal, all the other two export connection interlocking unit, two are had to change code in this receiving circuit, receive under original state and transmit for the first time, two variation codes are just changed after starting dicode variation unit, receive after second time transmits and start performance element, if the mistake of cracking, interlocking unit starts, performance element and dicode are changed unit locking, formed and export uniqueness, improve the character of remote control product, the perfect performance of remote control product.
Description
Technical field
Belong to telecontrol engineering field.
Background technology
Telecontrol engineering, is a kind of application electronic technology very widely, appears at widely especially now among household electrical appliance, but household electrical appliances are not high to the requirement of telecontrol engineering, as long as general coding just can reach requirement, but to some particular/special requirements, telecontrol engineering still also exists certain problem.
As everyone knows, application remoting technology, first just must encode, and the major significance of its coding avoids being cracked by other people.So the quality of coding level of confidentiality, be directly connected to the quality of product quality.From present technical merit, present coding integrated circuit, a kind of be higher gears take rolling code as the kind of representative, the advantage of this adhesive integrated circuit is that coding is complicated, cracks difficulty, but price, technical difficulty is large simultaneously.Another kind of is the coding being encoded to three kinds of states, as 2262 with the coding integrated circuit kind of representative, this kind of integrated advantage is that price is low, so the product made has very large price competitiveness, wide market, but shortcoming due to simple close pole of encoding not high, so can not be widely used in the higher product of requirement.
If change a kind of method of thinking, the thorough coding that changes cracks ability with the coding category of three kinds of states, this possibility exists, the thinking of this innovation is exactly macroscopically from other side, increase the restriction requirement of launching and receiving, the existence that this restriction requires, certainly greatly can improve the ability of cracking, and restriction requires more, obviously cracks difficulty larger.Our unit once have developed the transmitting Decision Making of Line Schemes of multiple change code, increase the restraining factors of launching, thus launch a kind of code thread having multiple restraining factors, improve the level of confidentiality degree of coding to a great extent, but also need the receiving lines of decoding to coordinate with it, just can become a complete entirety, if receive the uniqueness accomplishing to export, validity sometimes, this extremely has meaning to lifting level of confidentiality degree, but such reception needs relevant technical support, so be in now in the middle of research.
Summary of the invention
In order to thoroughly change tri-state coding crack ability, fundamental purpose of the present utility model proposes a kind of New Measure, the change code receiving circuit matched can be launched with change code, realize the reception that radiating portion sends twice change code, launch for research dicode and create better condition, four kinds of functions can be produced: one is the signal that can receive two kinds of codes after enforcement, two is receive to have sequential, first signal unique for the first time can only be received, then second time signal could be received, three is unique property with output, four is validity sometimes when receiving, owing to adding four kinds of important restrictions, so significantly increase the difficulty cracking decoding, improve the performance of remote control product all sidedly.
The measure that this patent proposes is:
1, the remote-control receiving circuit of two change code is made up of jointly radio frequency reception demodulator circuit, dicode variation unit, interlocking unit, performance element, decoding block.
Wherein: the output of radio frequency reception demodulator circuit connects the input of decoding block, and decoding block has four output, with dicode change that the input of unit connects for become code control end, what connect with performance element is last output terminal, all the other two output connection interlocking unit.
Wherein 6 connections of decoding code block 8 bit code position are fixed code, and another two become change code end, namely change code.
Performance element is made up of with executive circuit trigger resistance, diac: one end of trigger resistance is connected last output terminal, and the other end of trigger resistance and the positive pole of diac are connected together, and the negative pole of diac connects executive circuit.
The positive contact of performance element first locking diode sends out the positive pole of diode, and the negative pole of performance element first locking diode connects and becomes code control end.
Dicode variation unit controls the first phase inverter by becoming code, control triode, becomes that code controls the second phase inverter, isolating diode, stake resistance, current-limiting resistance form.
Become one end that code controls the input connection current-limiting resistance of the first phase inverter, namely the current-limiting resistance other end is the input of dicode variation unit, connect and become code control end, the input that change code controls the first phase inverter connects a stake resistance over the ground, become the input connection two-way that code controls the first phase inverter, the base stage of one tunnel connection control triode, control the grounded collector line of triode, the transmitting controlling triode connects the first variation code, second tunnel connects the positive pole of isolating diode, the negative pole of isolating diode connects and becomes the input that code controls the second phase inverter, become the output connection second variation code that code controls the second phase inverter.
Interlocking unit by or gate diode, interlocking phase inverter, locking diode form.
3rd output exports with the 4th the positive pole meeting or gate diode respectively, or the negative pole of gate diode be connected together connect interlocking phase inverter input, the output of interlocking phase inverter connects the negative pole of two locking diodes, the positive contact of a locking diode and performance element second locking diode sends out the positive pole of diode, and the positive pole of another locking diode and dicode variation unit locking diode connects in dicode variation unit and becomes the input that code controls the first phase inverter.
2, decoding block used is transient state type.
3, integrated form is made in this measure.
4, change code controls the first phase inverter, change code controls the second phase inverter, interlocking phase inverter is same integrated circuit, and there are 6 independently phase inverters inside, and this measure uses wherein 3.
5, there is the integrated circuit of 6 stand-alone inverters inside, and other three phase inverters are controlled the identical connected mode of the second phase inverter as become code, connects three bit code lines in 6 of decoding block fixed code for variation code.
6, be in parallel with 6 two code variation unit that become, 6 fixed code also connect into variation code.
This measure is explained as follows further:
One, sketch the cardinal principle of single ripple dicode transmitting that our unit for the previous period develops: in 8 bit codes of coding integrated package, wherein 6 is fixed code, all the other two is variation code, when launching, launch two subcategory numbers.Transmitter code is 6 fixed code wherein for the first time, and the first subcategory number of the variation code of two, and the code that second time is launched is 6 constant fixed code, and the coded signal after the variation of two variation codes.And receive and also will receive twice signal, be once 6 fixed code and the first subcategory number of variation code, second time is the coded signal after 6 fixed code change with variation code.
In the utility model, launch a subcategory number of the first variation code for suspending, code after first variation code variation is 0, one subcategory number of the second variation code is 0, code after second variation code variation is 1, so the subcategory number receiving the first variation code is suspend, the code after the first variation code variation is 0, second variation code is once the code after the 0, second variation code variation is 1.
Two, 8 bit codes of decoding block can be made variation code with the dicode variation unit of this measure: as in parallel in multiple dicode variation unit, each dicode variation unit controls two bit code, also remainder code line can be connected to become code control the first phase inverter output, become code and control the output of the second phase inverter, control the emitter of triode.
In this measure, a dicode variation unit only controls two bit codes.
In this measure 1, produce the line construction of twice decoding: corresponding with 8 bit code lines in decoding block and radiating portion integrated package of encoding.6 bit codes have wherein connected into fixed code (37 in Fig. 2).All the other two bit codes become the change code end of a kind of reception twice signal, and when original state, in receiving unit, the first variation code original state code bit that is a subcategory number presents is the stationary state suspended, second variation code original state is 0, and the first variation code just produced after receiving signal in decoding becomes 0, second, and to change code be the state of 1.Its decoding is integrated with four output terminals, wherein first exports and changes unit with dicode and connect, be and become code control, directly control to become code, the second output connects with performance element, is last output terminal, direct output decoded result, 3rd and the 4th exports and is connected interlocking unit, produce multidigit when exporting, and directly locking becomes code and execution at garbled-reception or when cracking code bit.
Three, dicode variation unit realizes becoming the reason of code: when become code control end no-output into zero time, the change code connected controls the first inverter output into high-order, control transistor base and have voltage, its collector and emitter are considered as off-state, so the first variation code that collector connects both did not connect power supply and ground wire, for suspension, become code and control a first phase inverter output high position, it is just low level that change code controls the second phase inverter output, therefore the second variation code is low level, otherwise export as time high when change code control end has, there is bias current in the control transistor base connected, emitter and collector conducting, the the first variation code ground wire connected is low level, and become code and control the second phase inverter and export high-order, therefore the second variation code is high-order, Here it is, and dicode variation unit controls two changes the transfer process of code.
Four, this measure can produce four kinds of functions after implementing: one is to receive change coded signal, two is receive to have sequential, first signal unique for the first time can only be received, then second time signal could be received, three is unique property with output, four is validity sometimes when receiving, owing to adding four kinds of important restrictions, so significantly increase the difficulty having cracked and decoded.
1, the principle of two kinds of coded signals can be received:
(1), receive the first subcategory number of sending of radiating portion principle: as shown in Figure 2, in an initial condition, change code control end (7 in Fig. 2) Non voltage output of decoding block, the change code connected controls the first phase inverter (25 in Fig. 2) output terminal into high-order, control triode (27 in Fig. 2) base stage and have voltage, its collector and emitter are considered as off-state, so the first variation code that collector connects both did not connect power supply and ground wire, for suspension, become code to control the first phase inverter to export the output that the change code connected controls the second phase inverter (29 in Fig. 2) be just low level, therefore the second variation code is low level, be consistent with the variation code of radiating portion, now not only can receive 6 fixed code, also a coded signal of variation code can be received.
(2), receive the second subcategory number of sending of radiating portion principle: after receiving the first signal sent, at this moment the change code control end (7 in Fig. 2) of decoding block exports the signal of 1, the output that change code controls the first phase inverter becomes low level from a high position, there is bias current in the control transistor base connected, emitter and collector conducting, the the first variation code ground wire connected is low level, become code and control the output of the first phase inverter into low, so become code and control a second phase inverter output high position, so the second variation code is high-order, after changing with the variation code launched, code is identical, so the different coded signal of second time can be received.
2, receive the sequential that has that twice change code must have successively to limit and principle: because first of decoding block becomes the original state of code end for suspension, second original state becoming code end is 0, so the first variation code one subcategory number only having radiating portion to send is for suspending, when one subcategory number of the second variation code is 0, launching and receiving code could be corresponding, the last output terminal of decoding block just has output, thus cause decoding block variation code just to have the new code of secondary, and this new code could coincide with transmitting, the last output terminal making decoding block connect performance element just has high-order output.If launching what first send is quadratic code 0 signal of the first variation code, although the original state of the second variation code of decoding block is 0, but because code bit is different, therefore can not normally receive, and the first variation code of decoding block is also in the suspension signal under original state, also cannot receive, so the last output terminal connecting performance element does not have output.More than analyze, if cracker is first the second subcategory number crack code, but because the first subcategory number is not opened, becoming code control end is low level, and performance element first locking diode (18 in Fig. 2) works, to performance element clamper, only have after the first subcategory number is opened, could receive the second subcategory number, two subcategory numbers correctly just can have last output, namely the output of decoding block connection performance element has voltage, could start performance element.
3, there is the principle of benefit that bit line uniquely receives and formation: in this measure, add interlock function, its benefit is when criminal is when cracking, and the bit line determined is wrong, then therefore cannot crack completely without output.Its reason one only has to become code bit line correctly, and what second time just may be had to receive is correct, otherwise can not normal reception.Two is that the bit line only exported to rear class exports correctly, last output is just had when two subcategory numbers are correct, three is if when multidigit output terminal has output or receives mistake simultaneously, because interlocking inverter input becomes or door, form interlocking, as can be seen from Figure 2, the current collection very low level of triode, second clamp diode (16 in Fig. 2) of performance element, the clamp diode (17 in Fig. 2) of dicode variation unit work, formation performance element, dicode variation unit clamper carried out to performance element, dicode variation unit, so cannot start.
4, the principle of twice receiving code validity sometimes: be the transient state type selected because decoding integrated circuit exports, so criminal can not be allowed to crack the more time, also be that the first subcategory number cracks successfully, second subcategory number must provide in the very short time, otherwise invalid, must will restart two subcategory numbers.
Phase inverter is for logical inversion, voltage by low uprise or by high step-down time, possessed buffer action, the element of rear class can not have been damaged.
After the invention process, after coordinating with the radiating portion applied for before our unit, below outstanding feature:
1, the character of coding integrated circuit is improved, realize the reception that radiating portion sends twice change code, just output is had after must receiving two subcategory numbers after receiving circuit decoding, thus there is the very high anti-ability of cracking, signal transmission is accurate, and keeping cheap advantage, the product making it make possesses the very large market competitiveness.
2, owing to increasing interlocking portions, this reception defines the function of quadruple constraint, substantially increases and cracks difficulty, but but can reliably receive.
If 3 with the combination again of rolling code circuit, it decodes difficulty is superpower, because rolling code is the coding of a class character, and in this measure, dicode transmitting is the coding of a class character, two kinds of coded combinations of different nature are larger than a kind of code breaks difficulty of character.
4, the dicode receiving lines of this measure receives reliable.
Its reason is that the decoding block fixed code in the present invention conforms to completely with the fixed code of radiating portion.Variation code is also also formulated according to the variation code launched, and have followed the rule of this kind of encoding and decoding block completely.Another very important reason is, what the decoding in receiving lines in the present invention realized is " tracking system ", that is to say that just automatically become the code needed for second time, twice receiving course is not disorderly, onside after receiving first change code.
5, crack very difficult: mainly contain three reasons, one is to have twice different code could realize decoding, just has output.Two is that different code needed for twice has timing requirements, can not be disorderly, 3rd major reason is, the requirement that this twice different change codes is also necessary free when launching, because the integrated output of the coding adopted in the present invention is the transient state output type adopted, in other words after receiving signal, its output can only remain a transient state high position, will disappear after blink.If criminal, after correct code is made in exploration in first time, want that within the very of short duration time, feel out the correct code of second time is more obviously very difficult.Also be that criminal wants to crack the present invention must by three passes: one is must twice different dicode, and two is also must have sequential, and three is also must be limited within the very short time just can complete, and therefore adopts " the barcode scanning instrument " of crime to crack and hardly may.From meaning in a certain respect, higher than rolling code, because crack rolling code in theory, there is certain probability in this level of confidentiality, and just this probability is very low, very low, and the present invention is because exist the above-mentioned three elements that crack, this crack probability just may be lower.
6, circuit is reliable, and one is that circuit is simplified.Two is that phase inverter has possessed buffer action, voltage by low uprise or by high step-down time, the element of rear class can not be damaged.
7, produce easily, one be need not be valuable equipment and instrument, two is that technology is simple, and three are that circuit is simplified and component requirements used is low, so can produce very high first-pass yield, very applicable microbusiness produces.
8, can how several variation codes by the method for this measure, be more conducive to promoting the difficulty cracked.
Accompanying drawing explanation
Fig. 1 is two total measure figure becoming the remote-control receiving circuit of code.
In figure: 1, radio frequency reception demodulator circuit (as superregenerative reception demodulating unit, or beat reception demodulating unit); 2, decoding block; 3, interlocking unit; 4, the 4th of decoding block the export; 5, the 3rd of decoding block the export; 6, the last output terminal of decoding block; 7, the change code control end of decoding block; 8, performance element; 9, dicode variation unit; 10, the first variation code; 11, the second variation code.
Fig. 2 is the practical circuit diagram of this measure relative section.
In figure: 1, radio frequency reception demodulator circuit (as superregenerative reception demodulating unit, or beat reception demodulating unit); 2, decoding block; 4, the 4th of decoding block the export; 5, the 3rd of decoding block the export; 6, the last output terminal of decoding block; 7, the change code control end of decoding block; 10, first becomes code end; 11, second becomes code end; 12, the 4th export or gate diode; 13, the 3rd export or gate diode; 14, phase inverter is interlocked; 15, trigger resistance; 16, performance element second clamp diode; 17, the clamp diode of dicode variation unit; 18, the first clamp diode of performance element; 19, diac; 20, executive circuit; 22, current-limiting resistance; 23, the stake resistance that code controls the first inverter input is become; 25, become code and control the first phase inverter; 27, triode is controlled; 29, become code and control the second phase inverter.
Embodiment
1, select element: wherein decoding block selects 2272, analog switch is CD4066, and controlling triode is PNP triode, and phase inverter is integrated circuit 4069, and there are 6 independently phase inverters inside.
2, weld: weld by Fig. 2.
3, adjustment and detection:
(1), can the Function detection of automatic changing code bit line: when launching first time signal, can reliable reception: the change code control end surveying decoding block with multimeter has high-order output.
(2), twice signal receiving function detects: after receiving the first signal, secondary signal of fasting ejection very much, at this moment the last output terminal of decoding block has high-order output.Have voltage to export when having multimeter to survey this, if when adopting oscillograph, display screen has high-order reaction.
(3) Received signal strength whether sequential, is detected: last output terminal multimeter or oscillograph being received decoding block, if first launch secondary signal, now the last output terminal of decoding block is without high pressure, if there is high pressure, illustrate that becoming code controls the first phase inverter damage, or the clamp diode of dicode variation unit connects instead.
(4) whether reliably interlocking unit, is detected: the positive pole surveying performance element diac with multimeter, when multidigit output terminal has output simultaneously, diac positive pole answers no-voltage, otherwise explanation or gate diode do not weld, or triode damages, or each clamp diode is bad.
(5), detect whether decoding block is non-interlocking type: first output and second of multimeter or oscillograph being received decoding block exports to be observed, and after receiving signal, signal can disappear within the time of short duration, otherwise should change the model of decoding block.
4, three phase inverters of other in 4069 can also be controlled the identical connected mode of the second phase inverter as become code, three bit code lines in 6 of decoding block fixed code are connected for variation code.Be in parallel with 6 two code variation unit that become, 6 fixed code also connect into variation code.
Claims (6)
1. the remote-control receiving circuit of pair change code, is characterized in that: be jointly made up of radio frequency reception demodulator circuit, dicode variation unit, interlocking unit, performance element, decoding block;
Wherein: the output of radio frequency reception demodulator circuit connects the input of decoding block, and decoding block has four output, with dicode change that the input of unit connects for become code control end, what connect with performance element is last output terminal, all the other two output connection interlocking unit;
Wherein 6 connections of decoding code block 8 bit code position are fixed code, and another two become change code end, namely change code;
Performance element is made up of with executive circuit trigger resistance, diac: one end of trigger resistance is connected last output terminal, and the other end of trigger resistance and the positive pole of diac are connected together, and the negative pole of diac connects executive circuit;
The positive contact of performance element first locking diode sends out the positive pole of diode, and the negative pole of performance element first locking diode connects and becomes code control end;
Dicode variation unit controls the first phase inverter by becoming code, control triode, becomes that code controls the second phase inverter, isolating diode, stake resistance, current-limiting resistance form;
Become one end that code controls the input connection current-limiting resistance of the first phase inverter, namely the current-limiting resistance other end is the input of dicode variation unit, connect and become code control end, the input that change code controls the first phase inverter connects a stake resistance over the ground, become the input connection two-way that code controls the first phase inverter, the base stage of one tunnel connection control triode, control the grounded collector line of triode, the transmitting controlling triode connects the first variation code, second tunnel connects the positive pole of isolating diode, the negative pole of isolating diode connects and becomes the input that code controls the second phase inverter, become the output connection second variation code that code controls the second phase inverter,
Interlocking unit by or gate diode, interlocking phase inverter, locking diode form;
3rd output exports with the 4th the positive pole meeting or gate diode respectively, or the negative pole of gate diode be connected together connect interlocking phase inverter input, the output of interlocking phase inverter connects the negative pole of two locking diodes, the positive contact of a locking diode and performance element second locking diode sends out the positive pole of diode, and the positive pole of another locking diode and dicode variation unit locking diode connects in dicode variation unit and becomes the input that code controls the first phase inverter.
2. two remote-control receiving circuit becoming code according to claim 1, is characterized in that: decoding block used is transient state type.
3. two remote-control receiving circuit becoming code according to claim 1, is characterized in that: integrated form is made in this measure.
4. two remote-control receiving circuit becoming code according to claim 1, it is characterized in that: change code controls the first phase inverter, change code controls the second phase inverter, interlocking phase inverter is same integrated circuit, there are 6 independently phase inverters inside, and this measure uses wherein 3.
5. two remote-control receiving circuit becoming code according to claim 1, it is characterized in that: there is the integrated circuit of 6 stand-alone inverters inside, other three phase inverters are controlled the identical connected mode of the second phase inverter as become code, three bit code lines in 6 of decoding block fixed code are connected for variation code.
6. two remote-control receiving circuit becoming code according to claim 1, is characterized in that: be in parallel with 6 two code variation unit that become, 6 fixed code also connect as variation code.
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| CN201420554403.6U CN204045005U (en) | 2014-09-25 | 2014-09-25 | The remote-control receiving circuit of two change code |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420554403.6U CN204045005U (en) | 2014-09-25 | 2014-09-25 | The remote-control receiving circuit of two change code |
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| CN201420554403.6U Expired - Fee Related CN204045005U (en) | 2014-09-25 | 2014-09-25 | The remote-control receiving circuit of two change code |
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Granted publication date: 20141224 Termination date: 20150925 |
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