CN204045006U - The remote-control receiving circuit that suspension change is 0 yard - Google Patents
The remote-control receiving circuit that suspension change is 0 yard Download PDFInfo
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- CN204045006U CN204045006U CN201420558865.5U CN201420558865U CN204045006U CN 204045006 U CN204045006 U CN 204045006U CN 201420558865 U CN201420558865 U CN 201420558865U CN 204045006 U CN204045006 U CN 204045006U
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Abstract
The remote-control receiving circuit that suspension change is 0 yard, belong to telecontrol engineering field, by radio frequency reception demodulator circuit, the change code unit of suspension change 0, interlocking unit, performance element, decoding block forms jointly, the output of radio frequency reception demodulator circuit connects the input of decoding block, decoding block has four outputs, connect with the input of the change code unit of suspension change 0 into becoming code control end, what connect with performance element is last output terminal, all the other two export connection interlocking unit, wherein 7 connections of decoding code block 8 bit code position are fixed code, another one becomes and becomes code end, namely code is changed, under original state, receive and transmit for the first time, becoming code control end exports high-order, the change code unit starting suspension change 0 is formed and becomes code, receive after transmitting for the second time, start performance element, when cracking mistake, interlocking unit starts, make it to become code and execution, formed and export uniqueness, significantly increase the difficulty cracking decoding, improve the performance of remote control product all sidedly.
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.
Improve the level of confidentiality degree of coding, this is the thing that remote control product is being studied always, the cost that level of confidentiality degree is high is high, technical difficulty is large, be not suitable for middle-size and small-size microbusiness, cost is low, the simple level of confidentiality degree of technology does not reach requirement again, 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 the ability of cracking can be improved, and restriction requires more, obviously difficulty is cracked 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 suspension change 0 yard is made up of jointly the change code unit of radio frequency reception demodulator circuit, suspension change 0, interlocking unit, performance element, decoding block.
Wherein: the output of radio frequency reception demodulator circuit connects the input of decoding block, decoding block has four outputs, connect with the input of the change code unit of suspension change 0 into becoming code control end, connect with performance element for last output terminal, all the other two export and connect interlocking unit.
Wherein 7 connections of decoding code block 8 bit code position are fixed code, and another one becomes and becomes code end, namely changes 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.
The change code unit of suspension change 0 is made up of with triode analog switch: receive after the control end of analog switch is connected current-limiting resistance and become code control end, to the base stage of triode after output termination resistance of analog switch, together with the transmitting of triode terminates at the change code of decoding integrated package, the collector of triode connect another resistance to.
Interlocking unit by or gate diode, 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 is connected together and connects the input of phase inverter, the output of 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 namely the suspend positive pole of change code unit locking diode of change 0 of another locking diode connects the control end of analog switch in the change code unit of suspension change 0.
2, decoding block used is transient state type.
3, integrated form is made in this measure.
4, by the connected mode of the change code unit of suspension change 0, remainder code line is also connect into variation code.
5, triode is PNP triode.
6, the stake resistance power that transistor collector connects is 1/4 watt.
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 7 is fixed code, all the other 1 is variation code, when launching, launch two subcategory numbers.Transmitter code is 7 fixed code wherein for the first time, and the first subcategory number of the variation code of 1, and the code that second time is launched is 7 constant fixed code, and the coded signal after the variation of 1 variation code.And receive and also will receive twice signal, be once 7 fixed code and the first subcategory number of variation code, second time is the coded signal after 7 fixed code change with variation code.
In the utility model, launch a subcategory number of the first variation code for suspending, the code changed after code variation is 0, so receive a subcategory number of variation code for suspension, the code after the variation of variation code is 0.
Two, 8 bit codes of decoding block can be made variation code with the change code unit of the suspension change 0 of this measure: the change code unit as multiple suspension change 0 is in parallel, change code unit controls two bit code of each suspension change 0.In this measure, the change code unit of a suspension change 0 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.7 bit codes have wherein connected into fixed code (37 in Fig. 2).All the other 1 bit codes become the change code end of a kind of reception twice signal, and when original state, changing the code original state code bit that is a subcategory number presents in receiving unit is the stationary state suspended, and just produces the state that the variation code in decoding becomes 0 after receiving signal.Its decoding is integrated with four output terminals, wherein first output connects with the change code unit of suspension change 0, 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, the change code unit of suspension change 0 realizes becoming the reason of code and is: when decoding block become code control end no-output into zero time, the control end of the analog switch connected is low level, switch is off state, PNP triode base stage is without bias current, its collector no-output, the change code end connected both did not connect power supply and ground wire, was suspension.Otherwise export as time high when integrated first output of decoding has, the control end of the analog switch connected is for high-order, and switch is on-state, there is bias current in PNP triode base stage, emitter and collector conducting, the change code terminate ground wire connected is low level, so achieve the transformation that suspension becomes 0.
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 control end of the analog switch (23 in Fig. 2) connected is low level, switch is off state, PNP triode (27 in Fig. 2) base stage is without bias current, its collector no-output, the change code end connected both did not connect power supply and ground wire, for " suspension " shape, 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 control end of the analog switch connected is for high-order, switch is on-state, and PNP triode base stage exists bias current, emitter and collector conducting, the change code terminate ground wire connected is low level, i.e. 0 state, identical with the variation code 0 launched, so can secondary coded signal be received.
2, receive the sequential that has that twice change code must have successively to limit and principle: the original state due to the change code end of decoding block is suspension, so when variation code one subcategory number only having radiating portion to send is for suspending, 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 variation code, the variation code of decoding block is also in the suspension signal under original state, 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 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 the change code unit of suspension change 0 works, to performance element, the change code unit of suspension change 0 has carried out clamper, so formation performance element, the change code unit of suspension change 0 cannot start.
4, the principle of twice receiving code validity sometimes: twice emitting signal has the strict demand receiving the time limit, (its benefit greatly can improve the ability of cracking) and principle: the transient state output type decoding integrated package that its decoding integrated package adopts in this measure, its benefit is, decoding integrated package is after receiving the signal sent for the first time, first output terminal has high-order output, but not permanent, second time signal can only be received time of short duration, otherwise from action expense, need again to receive first time signal, could secondary signal be received.Thus to crack and must form important elements.Thus the level of confidentiality cracked is greatly increased.
5, 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.
6, the analog switch CD4066 used in measure 1, there are 4 independently analog switches inside, and the crosstalk of each switch room is very little, representative value is-50dB, when control end adds high level, and switch conduction, conduction impedance is lower, and in addition, conduction impedance is substantially constant in whole input reference signal.Eliminate the change of switching transistor threshold voltage with input signal, therefore within the scope of whole working signal, conduction impedance is lower.Compared with single channel switch, there is input signal peak voltage ranges and equal supply voltage and the advantage such as conduction impedance is more stable in input reference signal.The switch cut-off when control end adds low level.During analog switch conducting, conducting resistance is tens ohm; During analog switch cut-off, present very high impedance, can open circuit be become.Analog switch can transmission of digital signals and simulating signal, and the upper limiting frequency of the simulating signal that can transmit is 40MHz.
Analog switch is a kind of three-stable state circuit, and it according to the level of control end, can determine the state of input end and output terminal.When control end is in strobe state, the state of output terminal depends on the state of input end; When control end is in cut-off state, then no matter input end's level how, output terminal is all high-impedance state.Analog switch possess low in energy consumption, speed fast, mechanical contact, volume are little and the feature such as long service life.
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 be 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, three be analog switch possess low in energy consumption, speed fast, mechanical contact, volume are little and the feature such as long service life.
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 total measure figure of the remote-control receiving circuit of suspension change 0 yard.
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, the change code unit of suspension change 0; 10, code is changed.
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, code end is become; 12, the 4th export or gate diode; 13, the 3rd export or gate diode; 14, phase inverter; 15, trigger resistance; 16, performance element second clamp diode; 17, the clamp diode of the change code unit of suspension change 0; 18, the first clamp diode of performance element; 19, diac; 20, executive circuit; 22, current-limiting resistance; 23, analog switch; 25, analog switch input end; 26, base electrode bias resistance; 27, PNP triode; 28, transistor collector stake resistance.
Embodiment
Fig. 1 and Fig. 2 describes the concrete a kind of mode implemented jointly.
1, select element: wherein decoding block selects 2272, analog switch is CD4066, and 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, explanation analog switch damages, or the clamp diode of the change code unit of suspension change 0 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 phase inverter 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, by the connected mode of the change code unit of suspension change 0, all the other code bits are also connect into variation code.
Claims (6)
1. the remote-control receiving circuit of suspension change 0 yard, is characterized in that: be jointly made up of the change code unit of radio frequency reception demodulator circuit, suspension change 0, interlocking unit, performance element, decoding block;
Wherein: the output of radio frequency reception demodulator circuit connects the input of decoding block, decoding block has four outputs, connect with the input of the change code unit of suspension change 0 into becoming code control end, connect with performance element for last output terminal, all the other two export and connect interlocking unit;
Wherein 7 connections of decoding code block 8 bit code position are fixed code, and another one becomes and becomes code end, namely changes 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;
The change code unit of suspension change 0 is made up of with triode analog switch: receive after the control end of analog switch is connected current-limiting resistance and become code control end, to the base stage of triode after output termination resistance of analog switch, together with the transmitting of triode terminates at the change code of decoding integrated package, the collector of triode connect another resistance to;
Interlocking unit by or gate diode, 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 is connected together and connects the input of phase inverter, the output of 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 namely the suspend positive pole of change code unit locking diode of change 0 of another locking diode connects the control end of analog switch in the change code unit of suspension change 0.
2. the remote-control receiving circuit of suspension change according to claim 10 yard, is characterized in that: decoding block used is transient state type.
3. the remote-control receiving circuit of suspension change according to claim 10 yard, is characterized in that: integrated form is made in this measure.
4. the remote-control receiving circuit of suspension change according to claim 10 yard, is characterized in that: by the connected mode of the change code unit of suspension change 0, is also connect by remainder code line as variation code.
5. the remote-control receiving circuit of suspension change according to claim 10 yard, is characterized in that: triode is PNP triode.
6. the remote-control receiving circuit of suspension change according to claim 10 yard, is characterized in that: the stake resistance power that transistor collector connects is 1/4 watt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420558865.5U CN204045006U (en) | 2014-09-26 | 2014-09-26 | The remote-control receiving circuit that suspension change is 0 yard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420558865.5U CN204045006U (en) | 2014-09-26 | 2014-09-26 | The remote-control receiving circuit that suspension change is 0 yard |
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| Publication Number | Publication Date |
|---|---|
| CN204045006U true CN204045006U (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420558865.5U Expired - Fee Related CN204045006U (en) | 2014-09-26 | 2014-09-26 | The remote-control receiving circuit that suspension change is 0 yard |
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| Country | Link |
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- 2014-09-26 CN CN201420558865.5U patent/CN204045006U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20150926 |
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| EXPY | Termination of patent right or utility model |