CN204046588U - The receiving circuit of two change code - Google Patents
The receiving circuit of two change code Download PDFInfo
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- CN204046588U CN204046588U CN201420554054.8U CN201420554054U CN204046588U CN 204046588 U CN204046588 U CN 204046588U CN 201420554054 U CN201420554054 U CN 201420554054U CN 204046588 U CN204046588 U CN 204046588U
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Abstract
The receiving circuit of two change code, belong to communication technique field, by decoding block, dicode translation circuit, locking unit, performance element, receiving demodulation circuit jointly form coordinate with it realize the receiving circuit that radiating portion sends twice change code, receiving demodulation circuit connects the input of decoding block, four tunnels of decoding block export switches through decoding circuit respectively, locking unit and performance element, change code control end no-voltage under initial condition, receive after transmitting for the first time, High voltage output is just had to start dicode translation circuit, form the conversion changing code in two decoding blocks, receive after transmitting for the second time, just start performance element, multidigit is made to export as time high-order cracking mistake and failing normally to receive, locking unit starts locking dicode translation circuit and performance element immediately, form the uniqueness exported, several can be welded according to dicode translation circuit more and become code, to strengthen the ability cracked, promote the performance of remote control product.
Description
Technical field
Belong to communication technique field.
Background technology
It is a kind of very important basic fundamental that radio coding is launched, and the product that its is formed, throughout society, if it is low to innovate a kind of cost, and the circuit that level of confidentiality is high, obviously has positive meaning.
Remote control is often by extraneous interference, as crowded in bad weather, surrounding environment, around remote control electrical appliance product is many, it is all the interference source affecting remote control, thus cause signal transmission inaccurate, our unit once have developed multiple transmitting Decision Making of Line Schemes possessing multiple conversion factor, it can address these problems effectively, if but the receiver do not matched, all become empty talk.
Our unit had once been developed into the transmitting Decision Making of Line Schemes of multiple single ripple dicode when leading portion, solve level of confidentiality not high, the problem that cost is high, but also need the receiving circuit coordinated with it could become as a whole, want the decoding circuit that can receive dicode, also need the support of decoding technique, remote control product gets more and more, it is made to receive inaccurate, in the face of such problem, need the cooperation of multiple technologies, how to accomplish that receiving the uniqueness exported is a key, for the problem of level of confidentiality, accomplish the timing received, ageing, also very large benefit can be produced to level of confidentiality degree, so, our unit is also in continuation research.
Summary of the invention
The main purpose of this patent is the launch scenario possessing multiple conversion factor according to developing before our unit, what proposition coordinated with it realizes the receiving circuit that radiating portion sends twice change code, thus present following obvious feature, one is the signal that can receive two kinds of codes, 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, keep cheap advantage, product is made to possess the superpower market competitiveness.
The measure that this patent proposes is:
1, the receiving circuit of two change code is made up of jointly decoding block, dicode translation circuit, locking unit, performance element, receiving demodulation circuit.
Wherein: receiving demodulation circuit connects the input of decoding block, four tunnels of decoding block export and connect dicode translation circuit, locking unit and performance element respectively.
Decoding block have 8 bit code Xian Yu tetra-tunnels export, 6 in 8 bit codes connect as fixed code, another two connect be the first variation code also second variation code, be also that the first change code end and second becomes code end.
Four tunnels export in connect with the input of dicode translation circuit for become code control end, connect with performance element be last output, all the other two-way connect with locking unit.
Locking unit is made up of OR circuit, base resistance, collector resistance, locking triode, locking diode.
Second output exports with the 3rd the input being connected OR circuit respectively, the base stage of locking triode is connect after the output connection base resistance of OR circuit, between the collector electrode of collector resistance ground connection locking triode and power supply, the collector electrode of locking triode connects the negative pole of two locking diodes, the positive pole of a locking diode and performance element first locking diode connects the input of executive circuit in performance element, and the positive pole of another locking diode and dicode translation circuit locking diode connects the positive terminal of arithmetic unit in dicode translation circuit.
Performance element forms with executive circuit by performing trigger resistance: the last output of decoding block is connected the one end performing trigger resistance, performs the input of another termination executive circuit of trigger resistance.
The positive pole of performance element first locking diode connects the input of executive circuit, and negative pole connects the change code control end of decoding block.
Dicode translation circuit is made up of arithmetic unit, current-limiting resistance, analog switch, bleeder circuit: become the positive terminal receiving arithmetic unit after code control end connects current-limiting resistance, the negative pole termination bleeder circuit of arithmetic unit, the control end of the output termination analog switch of arithmetic unit, the input end grounding line of analog switch, first variation code connects the output of arithmetic unit, and the second variation code connects the output of analog switch.
2, use the scheme of dicode translation circuit, connect the code bit in the fixed code of decoding block, make it to become variation code.
3, use the scheme of dicode translation circuit, 8 bit codes of decoding block are all connected for variation code.
4, decoding block used is non-locking type.
5, analog switch is integrated circuit.
6, arithmetic unit adopts integrated form.
This measure is explained as follows further:
First will illustrate: 1 in integrated circuit and decoding block of encoding represents that code bit connects a high position, is namely equal to the voltage of integrated circuit live wire, 0 represents that code bit connects low level, is equal to the ground wire of integrated circuit.Suspended state represents this code bit both missed electric sources, also access failure ground wire.
One, for the previous period, the cardinal principle that single ripple dicode that our unit develops is launched:
In 8 bit codes of coding integrated circuit, wherein 6 is fixed code, all the other two is variation code, radiating portion is when launching, launch two subcategory numbers, wherein transmitter code is 6 fixed code wherein for the first time, and a subcategory number of the variation code of two, the code that second time is launched is 6 constant fixed code, and the quadratic code after the variation of two variation codes.The reception coordinated is reception 6 fixed code for the first time, and the state that the variation code under two variation one subcategory numbers of codes and initial condition presents, and second time receives the quadratic code after 6 fixed code and two variation codes variations.
Two, use the dicode translation circuit in this measure, can connect multidigit variation code, be namely to increase analog switch more, also by all the other code bits or two or more, can be connected on arithmetic unit and analog switch.
In this measure, so the structure of twice decoding produced is: the same with the coding integrated package in launching, 6 bit codes in decoding block 8 bit code have been connected into fixed code (03 in Fig. 1), all the other two is the variation code of reception twice signal, in an initial condition, what the first variation code presented is 0 state, and what the second variation code presented is suspended state, and occurring to become code is just produce after receiving signal.Decoding block has four outputs, wherein connect with the input of dicode translation circuit for being become code control end (09 in Fig. 2), directly control transcoding.Second exports and exports is connected locking unit with the 4th, is when receiving mistake or multidigit output is a high position, by performance element and dicode translation circuit locking.3rd the last output (07 in Fig. 2) exported also known as decoding block, this output is connected with performance element, is directly to export decoded result at the corresponding levels.The structure of this circuit can realize the present invention and receive the requirement becoming code.In above-mentioned line construction, become the connected circuit of code control end and be called dicode translation circuit.
Three, this measure can produce four kinds of functions after implementing: one is to receive the signal becoming code, namely be can transcoding automatically, two is receive to have sequential, first signal unique for the first time can only be received, then could receive second time signal, three is unique property with output, and four is validity sometimes when receiving, owing to adding four kinds of important restrictions, so significantly increase the difficulty cracking decoding.
1, the reason receiving two coded signals is can transcoding voluntarily, and its principle is:
(1), receive the first subcategory number of sending of radiating portion principle: as in Fig. 2, in an initial condition, the change code control end Non voltage output of decoding block, the positive terminal no-voltage of arithmetic unit (030 in Fig. 2), negative phase end connect send out a bleeder circuit (031 in Fig. 2) make the output of arithmetic unit be low level, the first change code end that the output of arithmetic unit connects also is low level, the control end no-voltage of analog switch is off-state simultaneously, so the output of analog switch connect the suspended state that the second variation code is both access failure power supply also unearthed lines, corresponding with the signal that radiating portion changes code, because its principle does not run counter to the performance of existing product, so receive the first time transmitter code of radiating portion.
(2), receive the second subcategory number of sending of radiating portion principle, the i.e. principle of transcoding: after receiving the first signal sent, become code to control to export high signal, arithmetic unit positive terminal now has high pressure, the voltage that the bleeder circuit that this high pressure has exceeded end of oppisite phase is formed, therefore arithmetic unit exports high pressure, it is connected to the first variation code also becomes high-end trim, and the control end of analog switch makes switch connection because there being voltage, because the input termination of analog switch ground wire, so the second variation code is also low-end trim, with radiating portion change code change after code corresponding, thus second change coded signal that radiating portion sends can be received.
2, receive twice change code and must have the principle having sequential to limit successively: because the initial shape of the first variation code of decoding block is 0, the initial condition of the second variation code is for suspending, so when the first variation code only having radiating portion to send is 0, when second variation code is for suspending, launching and receiving code could be corresponding, the last output of decoding block just has output, thus the new code after causing decoding block variation code just to have variation, and this new code could coincide with transmitting, the last output making decoding block connect performance element just has high-order output.Otherwise radiating portion is if what first launch is quadratic code 0 signal of the second variation code, although the initial condition of the first variation code of decoding block is 0, but because code bit is different, therefore can not normally receive, and the second variation code of decoding block is also in the suspension signal under initial condition, also cannot receive, so the last output 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 (019 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 measure 1, add locking unit, its benefit is when criminal is when cracking, and the bit line determined is wrong, then completely without output, therefore cannot crack.Its reason one only has bit line correct, and what second time just may be had to receive is correct, otherwise can not normally receive.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 has output or receives mistake simultaneously, because the input of locking triode (027 in Fig. 2) becomes or door, form interlocking, the current collection very low level of its output and locking triode, performance element second locking diode (018 in Fig. 2), the locking diode (022 in Fig. 2) of dicode translation circuit works, to performance element, dicode translation circuit has carried out clamper, so formation performance element, dicode translation circuit cannot start.
4, the principle of twice receiving code validity sometimes: be the transient state type selected because decoding block 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.
After the invention process, after coordinating with the radiating portion applied for before our unit, below outstanding feature:
1, the reception that radiating portion sends twice change code is achieved, for twice emitting provides good condition, greatly improve the character of rudimentary coding integrated circuit, decoding block just has output after must receiving two subcategory numbers, thus there is the very high anti-ability of cracking, keep cheap advantage, the product making it make possesses the very large market competitiveness.
2, reliable reception two subcategory number, receive and possessed timing, ageing, the uniqueness of output, significantly increases the difficulty cracking decoding.
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.And the variation code part received, a signal code of the first variation code is 0, and the code of second time signal is 1, a signal of the second variation code suspends, second time signal is 0, and the twice change code sent with radiating portion definitely conforms to, 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 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, and this to crack probability just lower.
6, circuit is simple, reliable in function, produces 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 minuscule-type-enterprise produces.
7, according to dicode translation circuit, can connect several variation codes, more increased force will improves the difficulty cracking decoding more.
Accompanying drawing explanation
Fig. 1 is two total measure figure becoming the receiving circuit of code.
In figure: 01, radio frequency reception demodulation part (as superregenerative reception demodulating unit, or beat reception demodulating unit); 02, decoding block; 03, the fixed code of decoding block; 04, the second variation code of decoding block; 05, the first variation code of decoding block; 06, the 4th of decoding block the export; 07, the last output of decoding block; 08, second of decoding block export; 09, code control end is become; 010, performance element; 011, dicode translation circuit; 012, locking unit.
Fig. 2 is the practical circuit diagram of this measure relative section.
In figure: 01, radio frequency reception demodulation part (as superregenerative reception demodulating unit, or beat reception demodulating unit); 02, decoding block; 03, the fixed code of decoding block; 04, the second variation code of decoding block; 05, the first variation code of decoding block; 06, the 4th of decoding block the export; 07, the last output of decoding block; 08, second of decoding block export; 09, code control end is become; 015, trigger resistance is performed; 016, OR circuit; 018, performance element second locking diode; 019, performance element first locking diode; 020, executive circuit; 022, the locking diode of dicode translation circuit; 025, base resistance; 027, locking triode; 028, collector resistance; 029, current-limiting resistance; 030, arithmetic unit; 031, bleeder circuit; 032, analog switch.
Embodiment
Fig. 1 and Fig. 2 describes the concrete a kind of mode implemented jointly.
1, select element: wherein decoding block selects 2272, inverter NAND gate selects integrated circuit 4069, and there are 6 independently inverters inside.
2, weld: weld by Fig. 2.
3, Detection and adjustment:
(1), to operating state adjustment and detection: when decoding block (02 in Fig. 2) is not when receiving first signal, becoming code control end (09 in Fig. 2) is low level, becoming code control end with universal instrument survey and answering no-voltage.
(2) whether reliably locking unit, is detected: the input of surveying executive circuit (020 in Fig. 2) with universal instrument, when multidigit output has output simultaneously, when not welding wrong element, no-voltage is answered in the input of executive circuit, otherwise illustrate that locking triode (027 in Fig. 2) damages, or performance element second locking diode (018 in Fig. 2), dicode translation circuit locking diode (022 in Fig. 2) weldering anti-or damage.
(3) detection, to decoding block automatic changing code function: when launching first time signal, decoding block energy reliable reception, surveying change code control end with universal instrument has high-order output.If now connect the change code control end of decoding block with oscillographic hot junction, high signal is had to produce.
(4), the reception connecing twice signal is detected correct: decoding block is after receiving the first signal, and secondary signal of fasting ejection very much, at this moment a high position for the last output of decoding block (07 in Fig. 2) oriented rear class exports.Have voltage to export when surveying this with universal instrument, if when adopting oscilloscope, display screen has high-order reaction.
(5) Received signal strength whether sequential, is detected: last output universal instrument or oscilloscope being received decoding block, if first launch secondary signal, now the last output of decoding block should without high pressure, if there is high pressure, then illustrate that arithmetic unit damages or the locking diode of dicode translation circuit (022 in Fig. 2) welding mistake.
(6), detect whether decoding block is non-interlocking type: last output universal instrument or oscilloscope being received decoding block is observed, and after receiving signal, signal can disappear within the time of short duration, otherwise should change the model of decoding block.
4, according to the dicode translation circuit in this measure, after arithmetic unit, analog switch can be increased again, or after current-limiting resistance, increase the dicode translation circuit in this measure, after connect remainder code line in 6 bit code lines again, to increase the figure place of variation code.
Claims (6)
1. the receiving circuit of pair change code, is characterized in that: be jointly made up of decoding block, dicode translation circuit, locking unit, performance element, receiving demodulation circuit;
Wherein: receiving demodulation circuit connects the input of decoding block, four tunnels of decoding block export and connect dicode translation circuit, locking unit and performance element respectively;
Decoding block have 8 bit code Xian Yu tetra-tunnels export, 6 in 8 bit codes connect as fixed code, another two connect be the first variation code also second variation code, be also that the first change code end and second becomes code end;
Four tunnels export in connect with the input of dicode translation circuit for become code control end, connect with performance element be last output, all the other two-way connect with locking unit;
Locking unit is made up of OR circuit, base resistance, collector resistance, locking triode, locking diode:
Second output exports with the 3rd the input being connected OR circuit respectively, the base stage of locking triode is connect after the output connection base resistance of OR circuit, between the collector electrode of collector resistance ground connection locking triode and power supply, the collector electrode of locking triode connects the negative pole of two locking diodes, the positive pole of a locking diode and performance element first locking diode connects the input of executive circuit in performance element, and the positive pole of another locking diode and dicode translation circuit locking diode connects the positive terminal of arithmetic unit in dicode translation circuit;
Performance element forms with executive circuit by performing trigger resistance: the last output of decoding block is connected the one end performing trigger resistance, performs the input of another termination executive circuit of trigger resistance;
The positive pole of performance element first locking diode connects the input of executive circuit, and negative pole connects the change code control end of decoding block;
Dicode translation circuit is made up of arithmetic unit, current-limiting resistance, analog switch, bleeder circuit: become the positive terminal receiving arithmetic unit after code control end connects current-limiting resistance, the negative pole termination bleeder circuit of arithmetic unit, the control end of the output termination analog switch of arithmetic unit, the input end grounding line of analog switch, first variation code connects the output of arithmetic unit, and the second variation code connects the output of analog switch.
2. two receiving circuit becoming code according to claim 1, is characterized in that: the scheme using dicode translation circuit, connects the code bit in the fixed code of decoding block, make it to become variation code.
3. two receiving circuit becoming code according to claim 1, is characterized in that: the scheme using dicode translation circuit, 8 bit codes of decoding block is all connected for variation code.
4. two receiving circuit becoming code according to claim 1, is characterized in that: decoding block used is non-locking type.
5. two receiving circuit becoming code according to claim 1, is characterized in that: analog switch is integrated circuit.
6. two receiving circuit becoming code according to claim 1, is characterized in that: arithmetic unit adopts integrated form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420554054.8U CN204046588U (en) | 2014-09-25 | 2014-09-25 | The receiving circuit of two change code |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420554054.8U CN204046588U (en) | 2014-09-25 | 2014-09-25 | The receiving circuit of two change code |
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| CN204046588U true CN204046588U (en) | 2014-12-24 |
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| CN201420554054.8U Expired - Fee Related CN204046588U (en) | 2014-09-25 | 2014-09-25 | The receiving circuit of two change code |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106652571A (en) * | 2017-02-24 | 2017-05-10 | 四川九洲空管科技有限责任公司 | Blocking device and method for onboard collision avoidance system |
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2014
- 2014-09-25 CN CN201420554054.8U patent/CN204046588U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106652571A (en) * | 2017-02-24 | 2017-05-10 | 四川九洲空管科技有限责任公司 | Blocking device and method for onboard collision avoidance system |
| CN106652571B (en) * | 2017-02-24 | 2023-03-31 | 四川九洲空管科技有限责任公司 | Locking device and method for airborne collision avoidance system |
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