CN204089794U - Switching regulator remote control becomes code receiving circuit - Google Patents

Abstract

Switching regulator remote control becomes code receiving circuit, belong to telecontrol engineering field, unit is changed by dicode, interlocking unit, performance element, decoding block, radio frequency reception demodulator circuit forms jointly, 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, all the other two export connection interlocking unit, in an initial condition, it is corresponding that two variations code and radiating portions two change code, receive after transmitting for the first time, start the change code that dicode variation unit forms two variation codes, receive after second time transmits and just start performance element, if the mistake of cracking, interlocking unit will start immediately, cannot carry out changing and perform, possesses the uniqueness exported, improve the level of confidentiality degree of remote control product energetically, the perfect performance of remote control product, for research twice emitting provides good basis.

Description

Switching regulator remote control becomes code receiving circuit

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.

Increase the level of confidentiality degree of remote control, the coding category of thorough change three kinds of states crack ability, this possibility exists, the thinking of this innovation is exactly macroscopically from other side, increase the conversion requirement of launching and receiving, the existence that this conversion requires, certainly greatly can improve the ability of cracking, and conversion requires more, obviously cracks difficulty larger.Our unit once have developed the transmitting Decision Making of Line Schemes of multiple change code, increase the conversion factor of launching, thus launch a kind of code thread having multiple conversion factor, 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, main 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, switching regulator remote control becomes that code receiving circuit changes unit by dicode, interlocking unit, performance element, decoding block, radio frequency reception demodulator circuit form jointly.

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, 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.

Dicode variation unit is by current-limiting resistance, first control switch, second control switch, 3rd control switch and earth resistance form: become the control end connecing the first control switch after code controls termination current-limiting resistance, the input termination power of the first control switch, the output of control termination first control switch of the second control switch and the 3rd control switch, between the output that earth resistance is connected on the first control switch and ground wire, the input end grounding line of the second control switch, the input termination power of the 3rd control switch, the output termination first of the second control switch changes code, the output termination second of the 3rd control switch changes code.

Performance element is made up of with executive circuit trigger resistance, diac: one end of trigger resistance is connected last output, 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.

Interlocking unit by or gate diode, interlocking device, 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 control end of interlocking device, the input end grounding line of interlocking device, output termination source resistance of interlocking device, the output of interlocking device also 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 the control end of dicode variation unit first control switch.

2, decoding block used is transient state type.

3, interlocking device is that integrated circuit is formed.

4, the first control switch, the second control switch, the 3rd control switch and interlocking device are same integrated circuits, and there are 4 independently analog switches inside.

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 for suspending, 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 for suspending, and the code after the second variation code variation is 1.

Two, in this measure, the first control switch, the second control switch, the 3rd control switch, interlocking device are all analog switches, and with same integrated circuit CD4066, there are 4 independently analog switches its inside, does not interfere with each other mutually.

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 initial condition, in receiving unit, the first variation code initial condition code bit that is a subcategory number presents is the stationary state suspended, second variation code initial condition is also for suspending, 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 outputs, 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, 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 control end of the first control switch connected is low level, first control switch is off-state, due to the output termination earth resistance of the first control switch, second control switch and the 3rd control switch are also off state, so two variation codes are all suspended states, when change code control end has had high-order output, first control switch is connected, second control switch and the 3rd control switch are also on-state, therefore the second variation code and the 3rd changes code and there has also been relative conversion, 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 first control switch (26 in Fig. 2) connected is in off-state, the output of the first control switch is connected to earth resistance (27 in Fig. 2), so the second control switch (28 in Fig. 2) connected and the 3rd control switch (29 in Fig. 2) are also in disconnecting shape, what the second control switch was connected with the output of the 3rd control switch first changes code and second and changes and all become suspended state, 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 first control switch produces a high position makes the first control switch connect, the input termination of the first control switch power supply, therefore the control of the second control switch and the 3rd control switch also equals to have connected power supply high pressure, second control switch and the 3rd control switch are all connected, and the input of the second control switch is because be the ground wire connect, so the output of the second control switch is equal to connection ground wire, connect first variation code transfer 0 to, and the input termination of the 3rd control switch is power supply, switch on power so the output of the 3rd control switch is equal to, the the second variation code connected also changes 1 into, 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 initial condition of code end for suspension, second becomes the initial condition of code end into suspending, 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 for suspending, launching and receiving code could be corresponding, the last output 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 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, and first of decoding block the variation code is also in the suspension signal under initial condition, 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 (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 has output or receives mistake simultaneously, because interlocking device control end becomes or door, interlocking device input and output are connected, because input termination ground wire, so its output is low level, second clamp diode (16 in Fig. 2) of performance element, the clamp diode (17 in Fig. 2) of dicode variation unit works, to performance element, dicode variation unit has carried out clamper, so formation performance element, dicode variation unit cannot start.And decoding block the 3rd export with second export all no-voltage time, the input of interlocking device and output disconnect, and output because being added with source resistance (24 in Fig. 2) be a high position, so logic is now correct.

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.

5, the first control switch used in measure 1, the second control switch, the 3rd control switch, interlocking device are analog switch CD4066, there are 4 independently switches inside, the crosstalk of each switch room is very little, representative value is-50dB, when control end adds high level, switch conduction, conduction impedance is lower, 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 analog signal, and the upper limiting frequency of the analog signal that can transmit is 40MHz.

Analog switch is a kind of three-stable state circuit, and it according to the level of gating end, can determine the state of input end and output.When elected go side is in strobe state, the state of output depends on the state of input end; When elected go side is in cut-off state, then no matter input end's level how, output 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 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 minuscule-type-enterprise produces.

Accompanying drawing explanation

Fig. 1 is total measure figure that switching regulator remote control becomes code receiving circuit.

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 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 of decoding block; 7, the change code control end of decoding block; 10, first becomes code end; 11, second becomes code end; 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; 21, the 4th export connect or gate diode; 22, the 3rd export connect or gate diode; 23, interlocking device; 24, the source resistance of interlocking device output; 25, current-limiting resistance; 26, the first control switch; 27, the earth resistance of the first control switch output; 28, the second control switch; 29, the 3rd control switch.

Embodiment

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

1, select element: wherein decoding block selects 2272, the first control switch, the second control switch, the 3rd control switch, interlocking device select analog switch CD4066.

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 universal instrument 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 of decoding block has high-order output.Have voltage to export when surveying this with universal instrument, if when adopting oscilloscope, display screen has high-order reaction.

(3) 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 is without high pressure, if there is high pressure, illustrate that the first control switch damages, 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 universal instrument, when multidigit output has output simultaneously, diac positive pole answers no-voltage, otherwise explanation or gate diode do not weld, or interlocking device damages, or each clamp diode is bad.

(5), detect whether decoding block is non-interlocking type: first output and second of universal instrument or oscilloscope 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.

Claims (4)

1. switching regulator remote control becomes code receiving circuit, it is characterized in that: change unit by dicode, interlocking unit, performance element, decoding block, radio frequency reception demodulator circuit form jointly;

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, 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;

Dicode variation unit is by current-limiting resistance, first control switch, second control switch, 3rd control switch and earth resistance form: become the control end connecing the first control switch after code controls termination current-limiting resistance, the input termination power of the first control switch, the output of control termination first control switch of the second control switch and the 3rd control switch, between the output that earth resistance is connected on the first control switch and ground wire, the input end grounding line of the second control switch, the input termination power of the 3rd control switch, the output termination first of the second control switch changes code, the output termination second of the 3rd control switch changes code,

Performance element is made up of with executive circuit trigger resistance, diac: one end of trigger resistance is connected last output, 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;

Interlocking unit by or gate diode, interlocking device, 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 control end of interlocking device, the input end grounding line of interlocking device, output termination source resistance of interlocking device, the output of interlocking device also 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 the control end of dicode variation unit first control switch.

2. switching regulator remote control according to claim 1 becomes code receiving circuit, it is characterized in that: decoding block used is transient state type.

3. switching regulator remote control according to claim 1 becomes code receiving circuit, it is characterized in that: interlocking device is that integrated circuit is formed.

4. switching regulator remote control according to claim 1 becomes code receiving circuit, it is characterized in that: the first control switch, the second control switch, the 3rd control switch and interlocking device are same integrated circuits, and there are 4 independently analog switches inside.