CN204066383U - The change code receiver of non-gate control - Google Patents

Abstract

The change code receiver of non-gate control, belong to electronic technology field, by receiving demodulation part, the change decoding circuit of non-gate control, performance element, decoding integrated package forms jointly, the output of receiving demodulation part connects the input end of decoding integrated package, second of decoding integrated package exports and connects performance element, first of decoding integrated package exports the input end of not gate in the change decoding circuit connecting non-gate control, under original state, decoding integrated package can receive and transmit for the first time, make first of decoding integrated package to export and produce high pressure, the change decoding circuit starting non-gate control produces and becomes code, receive second time to transmit, realize the reception of " 0 " and " suspension " code twice change code that radiating portion sends, good condition is created to the research of twice emitting, the to encode integrated circuit of class of tri-state has been allowed to possess and highly difficult crack ability, the more wide space that allowed the development of telecontrol engineering have.

Description

The change code receiver of non-gate control

Technical field

Belong to electronic technology field.

Background technology

Remote control coding lift-off technology, one is kind a very wide range of electronic technology of application, occurs very widely in the life of the masses, the security and anti-theft as being used in almost car close the door with open the door on, the enabling being used in high quality anti-theft door with close the door upper etc.

The coding of remote control is particularly important, its direct relation the quality of remote control product, from present technical merit, present coding integrated circuit, 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.

Our unit had once been developed into the transmitting Decision Making of Line Schemes of multiple single ripple dicode when leading portion, for remote control creates good condition, but also need decoding circuit to coordinate with it and could become as a whole, correct decoding ability fill order, better have matched so receive with transmitting, just can avoid various unexpected generation, perform correct order.

Summary of the invention

Fundamental purpose of the present utility model is, the another kind of receiving lines scheme matched with the single ripple dicode launch scenario applied for before our unit is proposed, realize the reception of " 0 " and " suspension " code twice change code that radiating portion sends, after cooperation, present following obvious feature, one is the level of confidentiality degree by promoting the integrated circuit adopting tri-state coding class energetically, make it that there is the highly difficult anti-ability of cracking, but substantially remain cheap advantage, the product thus made produces the large competitive power of tool in market competition.Two is that senior class is encoded after integrated circuit combination with other, can realize superpower anti-disintegration effect.

The measure that this patent proposes is:

1, the change code receiver of non-gate control is made up of jointly the change decoding circuit of receiving demodulation part, non-gate control, performance element, decoding integrated package.

Wherein: the change decoding circuit of non-gate control is made up of not gate, analog switch.

The input end of not gate connects first output of decoding integrated package, the control end of the output connecting analog switch of not gate; The control end ground wire of analog switch, the output terminal of analog switch connects with the change code end of decoding integrated package.

The output of receiving demodulation part connects the input end of decoding integrated package, and second of decoding integrated package exports and connects performance element, and first of decoding integrated package exports the input end of not gate in the change decoding circuit connecting non-gate control.

2, decoding integrated package used is non-locking type.

3, analog switch is integrated circuit type.

This measure is explained as follows further:

1, summary 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 7 is fixed code, and wherein one is variation code, and radiating portion, when launching, launch two subcategory numbers.Wherein transmitter code is 7 fixed code wherein for the first time, and first subcategory number of " variation " code of one, and the code that second time is launched is 7 constant fixed code, and the coded signal after one " variation code " variation.And the first time coded signal of the receiving unit that the present invention the matches integrated middle variation that is received code is " 0 ", second time signal is Floating situation.(meaning that suspension is is the code that this code neither connects that " 1 " is not again connection " 0 ").And present receiving lines of the present invention, reliably will can receive the variation code sent for the first time is exactly " 0 ", and second time signal is the signal of Floating situation, but current scheme is different from the patent formula applied for last time.

2, in this measure, the line construction of the decode in two phases of generation: with 8 bit code lines in decoding integrated package and radiating portion integrated circuit of encoding corresponding.7 bit codes have wherein connected into fixed code, (16 in Fig. 2).Wherein a bit code becomes the change code part of a kind of reception twice signal, (15 in Fig. 2) and when original state, the receiving unit code bit that wherein " displacement code " position presents all the time is the stationary state of 0, and after receiving signal just produce decoding in change code become suspension.Its decoding integrated package has two output terminals, wherein first output, and being also called is automatic changing code circuit control end, and this end directly controls to become code.Another one is second output terminal (6 in Fig. 2), and this output terminal is connected with rear class, 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, the first input exporting Sheffer stroke gate is connected.The output of this not gate is connected to the control end of analog switch, the input end grounding line of analog switch, and the output of analog switch connects with the change code end of decoding integrated package.

3, the change decoding circuit of non-gate control realizes the principle that 0 change suspends and is: the input end of not gate connects first output of decoding integrated package, the control end of the output connecting analog switch of not gate; The control end ground wire of analog switch, the output terminal of analog switch connects with the change code end of decoding integrated package.

When integrated first output no-output of decoding is zero, first not gate connected is input as low level, exports as a high position, and the electronic relay control end connected is for high-order, and it is low level that its normally opened contact connects ground wire.When if instead decode, integrated first output has output to be 1, first not gate connected is input as a high position, and output terminal is low level, and the electronic relay control end connected is low level, and its normally opened contact disconnects.Electronic relay normally opened contact is open circuit, so integrated bit line of decoding neither connects power supply earth-free line again, for suspending.

4, the single ripple dicode once applied for our unit invents the decoding principle matching and produce:

This circuit produces four kinds of functions and corresponding principle:

(1) receive the first subcategory number of sending of radiating portion principle: as Fig. 2, because first not gate in automatic changing code circuit exports as high-order, so the control end of analog switch is high-order, its normally opened contact connects, the change code bit of decoding integrated package is connected to ground wire into low level " 0 ", be that low level is corresponding with the first time signal sent, so first signal that radiating portion sends can be received.

(2) receive the second subcategory number of sending of radiating portion principle: after receiving the first signal sent, at this moment to encode the first output terminal of integrated circuit, the input of not gate has the high signal of 1, now the first non-gate output terminal is low level, so the control end of analog switch is low level, switch disconnects, the change code bit of decoding integrated package becomes open circuit from the ground wire of former connection, being neither for high-order, is not low level yet, same with the variation code suspended phase of launching.So the different coded signal of second time can be received.

(3) receive the sequential that has that twice change code must have successively to limit and principle: because the initial shape of decoding integrated package flexure curve in the present invention is low level, so only have radiating portion to send variation code when being low level, launching and receiving code could be corresponding, the output of coding integrated circuit first just has output, thus decoding integrated package is caused to become the new code that code just has suspension, and this new code could coincide with transmitting, thus the second output terminal of the integrated package that makes to decode in the present invention has high-order output.Otherwise radiating portion is if first launching is secondary suspension signal, now because the change code bit line of coding integrated circuit of the present invention is that low level " 0 " does not meet with transmitter code, do not have the output be connected with rear class, more than analyze, the present invention's decoding is integrated with output, after must first receiving primary correct signal, just may receive the correct signal that second time is launched.

(4), 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 coding integrated circuit that its decoding integrated package adopts in this measure, its benefit is, coding integrated circuit 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.

After the invention process, after coordinating with the radiating portion applied for before our unit, below outstanding feature:

1, the character of rudimentary coding integrated circuit is greatly improved, just output is had after must receiving two subcategory numbers after the receiving circuit decoding of present inventor, thus there is the very high anti-ability of cracking, because rudimentary coding integrated circuit has cheap advantage, so its product has very strong competitive power.

If 2 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.

3, the dicode receiving lines of this measure receives reliable.

Its reason is that the decoding integrated package fixed code in the present invention conforms to completely with the fixed code of radiating portion.And the change code part received, signal code is 0 for the first time, and the code of second time signal suspends, and the twice change code sent with radiating portion definitely conforms to, and signal is 0 for the first time, and second signal is also suspend.Have followed the rule of this kind of encoding and decoding integrated package completely.Another very important reason is, what the decoding in receiving lines in the present invention realized is " tracking system ", that is to say after receiving first change code " 0 ", just automatically becomes the code " suspension " needed for second time, twice receiving course is not disorderly, onside.

4, 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.

5, circuit is reliable, and one is that circuit is simplified.

6, 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.

Accompanying drawing explanation

Fig. 1 is total measure schematic diagram of the change code receiver of non-gate control.

In figure: 1, receiving demodulation part (as superregenerative reception demodulating unit, or beat reception demodulating unit); 2, decoding integrated package; 3, performance element; 4, integrated package first of decoding exports; 5, the change decoding circuit of non-gate control; 6, integrated package second of decoding exports.

Fig. 2 is the practical circuit diagram of this measure relative section.

In figure: 1, receiving demodulation part (as superregenerative reception demodulating unit, or beat reception demodulating unit); 2, decoding integrated package; 3, performance element; 4, integrated package first of decoding exports; What integrated package of 6, decoding was connected with rear class second exports; 8, not gate; 10, the output terminal of not gate, the i.e. control end of analog switch; 12, analog switch; 16, the output terminal of analog switch, the change code end of integrated package of namely decoding; 18, the fixed code of decoding integrated package.

Embodiment

Fig. 1 and Fig. 2 describes the concrete a kind of mode implemented jointly.

1, element is selected: integrated package of wherein decoding selects 2272, and not gate selects 4069, and CD4066 selected by analog switch.

2, weld: weld by Fig. 2.

3, adjustment and detection:

(1) adjustment, to duty: the requirement withstand voltage according to decoding integrated package, by the power sharing of the power supply of analog switch Sheffer stroke gate with decoding integrated package.

(2), can the Function detection of automatic changing code bit line: when launching first time signal, energy reliable reception of the present invention: when having multimeter to survey, the first output terminal has high-order output.If now connect the change code bit line of decoding integrated package with oscillographic hot junction, the signal of display screen can be become the phenomenon (representing that becoming code bit line is suspension) of flower screen by fair line.

(3), twice signal receiving function detects: after receiving the first signal, secondary signal of fasting ejection very much, integrated package second of at this moment decoding exports high-order output.Have voltage to export when having multimeter to survey this, if when adopting oscillograph, display screen has high-order reaction.

(4) Received signal strength whether sequential, is detected: the second output terminal multimeter or oscillograph being received decoding integrated package, if first launch secondary signal, integrated package second of now decoding exports without high pressure, if there is high pressure, then illustrates that not gate or analog switch damage.

(5), detect whether decoding integrated package is non-interlocking type: first output and second of multimeter or oscillograph being received decoding integrated package exports to be observed, and after receiving signal, signal can disappear within the time of short duration, otherwise should change the model of decoding integrated package.

Claims (3)

1. the change code receiver of non-gate control, is characterized in that: be jointly made up of the change decoding circuit of receiving demodulation part, non-gate control, performance element, decoding integrated package;

Wherein: the change decoding circuit of non-gate control is made up of not gate, analog switch;

The input end of not gate connects first output of decoding integrated package, the control end of the output connecting analog switch of not gate; The control end ground wire of analog switch, the output terminal of analog switch connects with the change code end of decoding integrated package;

The output of receiving demodulation part connects the input end of decoding integrated package, and second of decoding integrated package exports and connects performance element, and first of decoding integrated package exports the input end of not gate in the change decoding circuit connecting non-gate control.

2. the change code receiver of non-gate control according to claim 1, is characterized in that: decoding integrated package used is non-locking type.

3. the change code receiver of non-gate control according to claim 1, is characterized in that: analog switch is integrated circuit type.