A chaotic encryption system circuit for information of automobile muffler pre-oxygen sensor

Abstract

The present invention provides a chaotic encryption system circuit of information of a front oxygen sensor of an automobile muffler, comprising: an encryption circuit module of the encryption system and a decryption circuit module of the encryption system which are connected to each other; the encryption circuit module of the encryption system comprises an automobile front oxygen sensor connection circuit, an automobile rear oxygen sensor connection circuit, an encryption circuit 1, a JERK chaotic circuit 1 and an encryption circuit 2; the decryption circuit module of the encryption system comprises a decryption circuit 1, a JERK chaotic circuit 2 and a decryption circuit 2; the encryption circuit module of the encryption system is used for respectively encrypting the front oxygen sensor output information output by the automobile front oxygen sensor connection circuit and the rear oxygen sensor output information output by the automobile rear oxygen sensor connection circuit, and the decryption circuit module of the encryption system is used for respectively decrypting the front oxygen sensor output information and the rear oxygen sensor output information, so as to realize the decryption of the front oxygen sensor output information and the rear oxygen sensor output information after chaotic encryption transmission.

Description

Technical Field

[0001] The invention relates to the technical field of chaotic encryption transmission of sensor information, and in particular to a chaotic encryption system circuit of information of a pre-oxygen sensor of an automobile muffler. Background Art

[0002] At present, people pay more and more attention to information security, which can effectively protect personal privacy and data from being stolen or misused. The information output by the car sensor can directly reflect the state of the car itself or the condition of the driver braking the car. If the information output by the car sensor is not encrypted, it is easy for others to obtain the relevant parameters of the car or grasp the driving habits of the driver. Chaotic secure communication technology is a better encryption method. The most commonly used method is to use a digital operation controller to convert the analog information collected by the sensor into digital quantity through an analog-to-digital converter, and then encrypt it with a chaotic sequence. After decryption, it is converted into the original information through a digital-to-analog converter. In this way, in the process of converting the analog and digital quantities of sensor information, there will definitely be a certain loss of information entropy.

[0003] In order to achieve lossless encrypted transmission of the information of the front oxygen sensor of the car muffler, a full analog circuit is used to encrypt, transmit and decrypt the two-way information of the front and rear oxygen sensors of the car at the same time. The chaotic analog signal generated by the JERK chaotic circuit channel can be directly merged or separated with the analog quantity of the two-way information of the front and rear oxygen sensors. After correct decryption, the restored two-way information of the front and rear oxygen sensors is exactly the same as their original information, which is incomparable to other chaotic secure communication systems.

[0004] Therefore, it is necessary to provide a chaotic encryption system circuit for the information of the pre-oxygen sensor of the automobile muffler. Summary of the invention

[0005] The present invention provides a chaotic encryption system circuit for information of a front oxygen sensor of an automobile muffler, which uses a continuous analog chaotic voltage signal generated by a chaotic oscillation circuit as a carrier signal for encrypting information of front and rear oxygen sensors, and can be directly encrypted with the analog voltage information output by the front and rear oxygen sensors, without the need to use a digital processor to design the encrypted information, and converting the analog voltage output by the front and rear oxygen sensors into a digital output process.

[0006] The present invention provides a chaotic encryption system circuit for information of a pre-muffler oxygen sensor of an automobile, comprising:

[0007] An encryption circuit module of an encryption system and a decryption circuit module of an encryption system connected to each other;

[0008] The encryption circuit module of the encryption system includes a car front oxygen sensor connection circuit, a car rear oxygen sensor connection circuit, an encryption circuit 1, a JERK chaotic circuit 1 and an encryption circuit 2; the decryption circuit module of the encryption system includes a decryption circuit 1, a JERK chaotic circuit 2 and a decryption circuit 2; the car front oxygen sensor connection circuit is connected to the encryption circuit 1, the car rear oxygen sensor connection circuit is connected to the encryption circuit 2, the encryption circuit 1 and the encryption circuit 2 are connected to the JERK chaotic circuit 1; the decryption circuit 1 and the decryption circuit 2 are connected to the JERK chaotic circuit 2;

[0009] The encryption circuit module of the encryption system is used to encrypt the front oxygen sensor output information output by the front oxygen sensor connection circuit of the automobile and the rear oxygen sensor output information output by the rear oxygen sensor connection circuit of the automobile respectively. The decryption circuit module of the encryption system is used to decrypt the front oxygen sensor output information and the rear oxygen sensor output information respectively, so as to realize the decryption of the front oxygen sensor output information and the rear oxygen sensor output information after chaotic encrypted transmission.

[0010] Furthermore, the JERK chaotic circuit 1 includes multiple resistors, multiple operational amplifiers and multiple capacitors; the multiple resistors are: resistor R 1 , resistor R 2 , resistor R 3 , resistor R 4 , resistor R 5 , resistor R 6 , resistor R 7 , resistor R 8 , resistor R 9 , resistor R 10 , resistor R 11 , resistor R 12 , resistor R 13 and resistor R 14 , multiple operational amplifiers are: operational amplifier OP 1 , Operational Amplifier OP 2 , Operational Amplifier OP 3 , Operational Amplifier OP 4 , Operational Amplifier OP 5 , Operational Amplifier OP 6 , Operational Amplifier OP 7 and operational amplifier OP 8 , multiple capacitors are: Capacitor C 1 , capacitor C 2 and capacitor C 3 ;

[0011] The JERK chaotic circuit 1 forms a chaotic signal-x channel, a chaotic signal-y channel and a chaotic signal-z channel for encryption; the chaotic signal-x channel, the chaotic signal-y channel and the chaotic signal-z channel are used to combine the output signal with a plurality of resistors and a plurality of operational amplifiers to form a sign function circuit, and the sign function circuit is used to generate a post-feedback to the input ends of the chaotic signal-x channel, the chaotic signal-y channel and the chaotic signal-z channel, respectively, to generate an autonomous oscillating chaotic circuit;

[0012] The encryption circuit 1 includes a resistor R 15 , resistor R 16 , resistor R 17 , resistor R 18 , resistor R 23 , resistor R 24 , resistor R 25 and resistor R 26 , and the operational amplifier OP 9 and operational amplifier OP 11 , and the first waveform recorder;

[0013] The encryption circuit 2 includes a resistor R 19 , resistor R 20 , resistor R 21 , resistor R 22 , resistor R 27 , resistor R 28 , resistor R 29 and resistor R 30 , and the operational amplifier OP 10 and operational amplifier OP 12 .

[0014] Further, the automobile front oxygen sensor connection circuit includes a front oxygen sensor, an automobile electronic control unit A, and a fuel rod relay A;

[0015] The positive terminal 1 of the heater in the front oxygen sensor is connected to the terminal 3 of the fuel rod relay A, and the negative terminal 2 of the heater in the front oxygen sensor is grounded;

[0016] The output signal terminal 3 of the front oxygen sensor is connected to the terminal 2 of the automobile electronic control unit A, and the negative terminal 4 of the front oxygen sensor signal line is connected to the ground terminal 1 of the automobile electronic control unit A; the terminal 4 of the fuel rod relay A is connected to the positive 12V of the automobile power supply, and the terminals 1 and 2 of the fuel rod relay A are connected in parallel to the power supply terminal of the automobile engine;

[0017] The output signal of the front oxygen sensor 3 passes through the resistor R 17 Connecting the operational amplifier OP 9 The same-phase input terminal, the car power supply negative 12V passes through the resistor R 18 Connect to the non-inverting input terminal of operational amplifier OP9;

[0018] The car power ground wire passes through the resistor R 15 Connect to the operational amplifier OP 9 The inverting input of the operational amplifier OP 9 The inverting input is connected through the resistor R 16 Connecting the operational amplifier OP 9 The output of the operational amplifier OP 9 The output terminal is connected through the resistor R 25 Connecting the operational amplifier OP 11 Non-inverting input terminal, chaotic signal-x channel operational amplifier OP 2 The output terminal is connected to the operational amplifier OP through the resistor R26. 11 The common-mode input terminal, the car power ground wire passes through the resistor R 24 Connect to the operational amplifier OP 11 Inverting input terminal, operational amplifier OP 11 The inverting input is connected through the resistor R 23 Connect to the operational amplifier OP 11 Output terminal, operational amplifier OP 11 The output end is connected to the self-locking button K 1 The third end of the self-locking button K 1 Connect the 1st end of the front oxygen sensor output signal 3, and the K of the self-locking button 1 The second end is connected to the K of the self-locking button 1 The 4th end of the self-locking button K 1 The second end is connected to the signal channel 1 of the first waveform recorder to store the recorded waveform.

[0019] Further, the automobile rear oxygen sensor connection circuit includes a rear oxygen sensor, an automobile electronic control unit B and a fuel rod relay B;

[0020] The positive terminal 1 of the heater in the rear oxygen sensor is connected to the terminal 3 of the fuel rod relay B, the negative terminal 2 of the heater in the rear oxygen sensor is grounded, the output signal terminal 3 of the rear oxygen sensor is connected to the terminal 2 of the automobile electronic control unit B, and the negative terminal 4 of the rear oxygen sensor signal line is connected to the ground terminal 1 of the automobile electronic control unit B; the terminal 4 of the fuel rod relay B is connected to the positive 12V of the automobile power supply, and the terminals 1 and 2 of the fuel rod relay B are connected in parallel to the power supply terminal of the automobile engine;

[0021] The output signal of the rear oxygen sensor 3 passes through the resistor R 21 Connecting the operational amplifier OP 10 The same-phase input terminal, the car power supply negative 12V passes through the resistor R 22 Connect to the operational amplifier OP 10 The non-inverting input terminal of the vehicle power supply is connected to the ground wire through the resistor R 19 Connect to the operational amplifier OP10 Inverting input terminal, operational amplifier OP 10 The inverting input is connected through the resistor R 20 Connecting the operational amplifier OP 10 Output terminal, operational amplifier OP 10 The output terminal is connected through the resistor R 29 Connecting the operational amplifier OP 12 Non-inverting input terminal, chaotic signal-z channel operational amplifier OP 6 The output terminal is connected to the operational amplifier OP through the resistor R30. 12 The common-mode input terminal, the car power ground wire passes through the resistor R 27 Connect to the operational amplifier OP 12 Inverting input terminal, operational amplifier OP 12 The inverting input is connected through the resistor R 28 Connect to the operational amplifier OP 12 Output terminal, operational amplifier OP 12 The output end is connected to the self-locking button K 2 The third end of the self-locking button K 2 The first end is connected to the output signal terminal 3 of the rear oxygen sensor, and the K of the self-locking button 2 The second end is connected to the K of the self-locking button 2 The 4th end of the self-locking button K 2 The fourth end is connected to the signal channel 2 of the first waveform recorder to store the recorded waveform;

[0022] Self-locking button K 1 When not pressed, the signal channel 1 of the first waveform recorder stores the unencrypted output information of the front oxygen sensor, and the signal channel 2 stores the unencrypted output information of the rear oxygen sensor;

[0023] Self-locking button K 2 When pressed, the first waveform recorder signal channel 1 stores the chaotic encrypted information output by the front oxygen sensor, and the first waveform recorder signal channel 2 stores the chaotic encrypted information output by the rear oxygen sensor;

[0024] On the self-locking button K 1 And self-locking button K 2 If both buttons are pressed and the correct encryption key is not obtained, the information of the car's pre-muffler oxygen sensor cannot be obtained, so that the car's engine status can be protected, thereby ensuring that the privacy of the driver's braking status of the car is not stolen.

[0025] Furthermore, the operational amplifier OP 3 The output terminal is connected through the resistor R 3 Connecting the operational amplifier OP 2 Inverting input terminal, operational amplifier OP 2The inverting input is connected through capacitor C 1 Connecting the operational amplifier OP 2 Output end, operational amplifier OP for chaotic encryption of front oxygen sensor information 11 The output terminal passes through the resistor R 1 Connecting the operational amplifier OP 1 The inverting input of the operational amplifier OP 1 The non-inverting input terminal is grounded, and the operational amplifier OP 1 The inverting input is connected through the resistor R 2 Connecting the operational amplifier OP 1 The output end forms the -x channel of the chaotic signal of the front oxygen sensor output information;

[0026] Operational Amplifier OP 5 The output terminal is connected through the resistor R 4 Connect to the operational amplifier OP 3 Inverting input terminal, operational amplifier OP 3 The non-inverting input terminal is grounded, and the operational amplifier OP 3 The inverting input is connected through capacitor C 2 Connect to the operational amplifier OP 3 The output end forms the -y channel of the chaotic signal;

[0027] Operational amplifier OP for chaotic encryption of front oxygen sensor information 11 The output terminal is connected to the operational amplifier OP 7 The inverting input of the operational amplifier OP 7 The non-inverting input terminal of the operational amplifier OP is grounded. 7 The output terminal is connected through the resistor R 13 Connect to the operational amplifier OP 8 Inverting input terminal, operational amplifier OP 8 The inverting input is connected through the resistor R 14 Connect to the operational amplifier OP 8 Output terminal, operational amplifier OP 8 The non-inverting input terminal is grounded, and the operational amplifier OP 3 The output terminal is connected through an adjustable resistor R 5 Connecting the operational amplifier OP 4 Inverting input terminal, operational amplifier OP 1 The output terminal is connected through an adjustable resistor R 6 Connecting the operational amplifier OP 4 Inverting input terminal, operational amplifier OP 8 The output terminal is connected through an adjustable resistor R 7 Connecting the operational amplifier OP 4 Inverting input terminal;

[0028] Operational amplifier OP for chaotic encryption of rear oxygen sensor information 12 The output terminal is connected through an adjustable resistor R 8 Connecting the operational amplifier OP 4 Inverting input terminal, operational amplifier OP 4 The inverting input is connected through an adjustable resistor R 9 Connecting the operational amplifier OP 4 Output terminal, operational amplifier OP 4 The output terminal is connected through the resistor R 10 Connect to the operational amplifier OP 5 Inverting input terminal, operational amplifier OP 5 The non-inverting input terminal is grounded, and the operational amplifier OP 5 The inverting input is connected through capacitor C 3 Connect to the operational amplifier OP 5 Output terminal, operational amplifier OP 5 The output terminal is connected through the resistor R 11 Connect to the operational amplifier OP 6 Inverting input terminal, operational amplifier OP 6 The non-inverting input terminal is grounded, and the operational amplifier OP 6 The inverting input is connected through the resistor R 12 Connect to the operational amplifier OP 6 The output end forms the -z channel of the chaotic signal of the rear oxygen sensor output information;

[0029] Operational Amplifier OP 11 The output terminal of the cable is connected to the J jack 1 , Operational Amplifier OP 12 The output terminal of the cable is connected to the J jack 2 .

[0030] Furthermore, the JERK chaotic circuit 2 includes a resistor R 41 , resistor R 42 , resistor R 43 , resistor R 44 , resistor R 45 , resistor R 46 , resistor R 47 , resistor R 48 , resistor R 49 , resistor R 50 , resistor R 51 , resistor R 52 Resistor R 53 and resistor R 54 ; and operational amplifier OP 21 , Operational Amplifier OP 22 , Operational Amplifier OP 23 , Operational Amplifier OP 24 , Operational Amplifier OP25 , Operational Amplifier OP 26 , Operational Amplifier OP 27 , Operational Amplifier OP 28 ; and capacitor C 4 , capacitor C 5 and capacitor C 6 ;

[0031] Decryption circuit 1 and decryption circuit 2 include resistor R 55 , resistor R 56 , resistor R 57 , resistor R 58 , resistor R 59 , resistor R 60 , resistor R 61 , resistor R 62 , resistor R 63 and resistor R 64 , and the operational amplifier OP 29 , Operational Amplifier OP 30 and operational amplifier OP 31 , and a second waveform recorder;

[0032] The JERK chaotic circuit 2 forms a -x' channel chaotic signal for decryption, a -y' channel chaotic signal for decryption, and a -z' channel chaotic signal for decryption.

[0033] Furthermore, the operational amplifier OP 23 The output terminal is connected through the resistor R 41 Connect to the operational amplifier OP 21 Inverting input terminal, operational amplifier OP 21 The non-inverting input terminal is grounded, and the operational amplifier OP 21 The inverting input is connected through capacitor C 4 Connecting the operational amplifier OP 21 Output terminal, operational amplifier OP 21 The output terminal is connected through the resistor R 42 Connect to the operational amplifier OP 22 Inverting input terminal, operational amplifier OP 22 The non-inverting input terminal is grounded, and the operational amplifier OP 22 The inverting input is connected through the resistor R 43 Connecting the operational amplifier OP 22 The output end forms a chaotic signal of the -x′ channel of the front oxygen sensor output information decryption chaotic circuit;

[0034] Operational Amplifier OP 25 The output terminal is connected through the resistor R 44 Connect to the operational amplifier OP 23 Inverting input terminal, operational amplifier OP 23The non-inverting input terminal is grounded, and the operational amplifier OP 23 The inverting input is connected through capacitor C 5 Connecting the operational amplifier OP 23 At the output end, a chaotic signal of the -y′ channel of the chaotic circuit for decrypting the information of the front and rear oxygen sensors is formed;

[0035] Operational Amplifier OP 23 The output terminal is connected through an adjustable resistor R 45 Connect to the operational amplifier OP 24 Inverting input terminal, operational amplifier OP 29 The output terminal is connected through an adjustable resistor R 46 Connect to the operational amplifier OP 24 Inverting input terminal, operational amplifier OP 28 The output terminal is connected through an adjustable resistor R 47 Connect to the operational amplifier OP 24 Inverting input terminal, wire jack J 4 Through the adjustable resistor R 48 Connect to the operational amplifier OP 24 Inverting input terminal, operational amplifier OP 24 The non-inverting input terminal is grounded, and the operational amplifier OP 24 The inverting input is connected through an adjustable resistor R 49 Connect to the operational amplifier OP 24 Output terminal, operational amplifier OP 24 The output terminal is connected through the resistor R 50 Connect to the operational amplifier OP 25 Inverting input terminal, operational amplifier OP 25 The non-inverting input terminal is grounded, and the operational amplifier OP 25 The inverting input is connected through capacitor C 6 Connecting the operational amplifier OP 25 Output terminal, operational amplifier OP 25 The output terminal is connected through the resistor R 51 Connect to the operational amplifier OP 26 Inverting input terminal, operational amplifier OP 26 The non-inverting input terminal is grounded, and the operational amplifier OP 26 The inverting input is connected through the resistor R 52 Connecting the operational amplifier OP 26 At the output end, a -z′ channel chaotic signal of the front oxygen sensor output information decryption chaotic circuit is formed.

[0036] Furthermore, the wire jack J 3 Through the resistor R 55 Connect to the operational amplifier OP 29 Inverting input terminal, operational amplifier OP 29The non-inverting input terminal is grounded, and the operational amplifier OP 29 The inverting input is connected through the resistor R 56 Connecting the operational amplifier OP 29 Output terminal, wire jack J 3 Connecting the operational amplifier OP 27 Inverting input terminal, operational amplifier OP 27 The non-inverting input terminal is grounded, and the operational amplifier OP 27 The output terminal is connected through the resistor R 53 Connect to the operational amplifier OP 28 Inverting input terminal, operational amplifier OP 28 The non-inverting input terminal is grounded, and the operational amplifier OP 28 The inverting input is connected through the resistor R 54 Connecting the operational amplifier OP 28 Output terminal, operational amplifier OP 22 The output terminal is connected through the resistor R 57 Connect to the operational amplifier OP 30 Inverting input terminal, operational amplifier OP 30 The inverting input is connected through the resistor R 60 Connecting the operational amplifier OP 30 Output terminal, operational amplifier OP 29 The output terminal is connected through the resistor R 58 Connect to the operational amplifier OP 30 Non-inverting input terminal, operational amplifier OP 30 The non-inverting input is connected through the resistor R 59 Ground, operational amplifier OP 30 The output terminal outputs the decrypted front oxygen sensor information and connects to the signal channel 1 of the second waveform recorder;

[0037] Cable jack J 4 Through the resistor R 61 Connect to the operational amplifier OP 31 Inverting input terminal, operational amplifier OP 31 The inverting input is connected through the resistor R 62 Connecting the operational amplifier OP 31 Output terminal, operational amplifier OP 26 The output terminal is connected through the resistor R 63 Connect to the operational amplifier OP 31 Non-inverting input terminal, operational amplifier OP 31 The non-inverting input is connected through the resistor R 64 Ground, operational amplifier OP 31 The output end outputs the decrypted rear oxygen sensor information and connects to the signal channel 2 of the second waveform recorder.

[0038] Furthermore, it also includes a first control circuit electrically connected to the JERK chaotic circuit 1, and based on the first control circuit, adjusts the resistance adjustment range of the adjustable resistor to set the encryption key; specifically:

[0039] A first control circuit is provided which is electrically connected to the JERK chaotic circuit 1;

[0040] The first control circuit is used to adjust the adjustable resistor R according to the set adjustment method. 5 , adjustable resistor R 6 , adjustable resistor R 7 , adjustable resistor R 8 and adjustable resistor R 9 The adjustment range is used to obtain a plurality of resistance adjustment range values; the adjustment method is to adjust the resistance value of one resistor, two resistors, three resistors, four resistors or five resistors at will;

[0041] A plurality of groups of resistance adjustment amplitude values ​​are arranged and combined based on a set arrangement and combination template to obtain an arrangement and combination of resistance adjustment amplitude values, and the arrangement and combination of resistance adjustment amplitude values ​​are used as encryption keys for encryption in front and rear oxygen sensor information encryption circuits.

[0042] Furthermore, it also includes a voltage monitoring circuit and a voltage waveform signal linear adjustment circuit;

[0043] The voltage monitoring circuit is connected to the encryption circuit module of the encryption system and the decryption circuit module of the encryption system respectively, and the voltage signal detection circuit is connected to the first waveform recorder and the second waveform recorder respectively; the voltage signal monitoring circuit is used to monitor and obtain the voltage waveform signal in the output information of the front oxygen sensor and the output information of the rear oxygen sensor, and the encrypted voltage waveform signal obtained after the voltage waveform signal is encrypted, and display the voltage waveform signal and the encrypted voltage waveform signal based on the first waveform recorder;

[0044] The voltage signal monitoring circuit is also used to monitor and obtain the correctly decrypted voltage waveform signal in the front oxygen sensor output information and the rear oxygen sensor output information, and the incorrectly decrypted voltage waveform signal in the front oxygen sensor output information and the rear oxygen sensor output information, and display the correctly decrypted voltage waveform signal and the incorrectly decrypted voltage waveform signal based on the second waveform recorder;

[0045] The voltage waveform signal linear adjustment circuit is configured in the encryption circuit module of the encryption system and the decryption circuit module of the encryption system. The voltage waveform signal linear adjustment circuit is used to linearly adjust the voltage waveform signal in the front oxygen sensor output information and the rear oxygen sensor output information into a first voltage waveform signal whose waveform center point is zero and whose amplitude remains unchanged, and the first voltage waveform signal is used for encryption and decryption.

[0046] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0047] 1. The continuous analog chaotic voltage signal generated by the chaotic oscillation circuit is used as the carrier signal for encrypting the front and rear oxygen sensor information. It can be directly encrypted after linear processing with the analog voltage signal output by the front and rear oxygen sensors, without the need to use a digital processor to design encryption information;

[0048] 2. The self-excited oscillation process is generated by using the white noise voltage at the moment of power-on. Compared with the encryption circuit designed by the digital processor, it does not need to specify a specific digital quantity as the oscillation iteration condition. The generated chaotic carrier signal is a chaotic signal in the strict sense, which is more secure for the front and rear oxygen sensor information encryption system;

[0049] 3. If any adjustable resistance of the encryption circuit and the decryption circuit is slightly different by 0.2%, information decryption cannot be achieved, which has the characteristics of wide key range and high difficulty;

[0050] 4. The encryption circuit and decryption circuit are both independent units with complete functions and strong portability, and can be used in other automotive sensor information chaos encryption system circuits.

[0051] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0052] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0054] Figure 1 This is the circuit structure schematic diagram of the front and rear oxygen sensor information encryption system;

[0055] Figure 2 An encryption circuit for the front and rear oxygen sensor information encryption system circuit (including the JERK chaos circuit diagram part used for encryption and the front and rear oxygen sensor information encryption circuit diagram part);

[0056] Figure 3 A decryption circuit for the front and rear oxygen sensor information decryption system circuit (including the JERK chaotic circuit diagram part for decryption and the front and rear oxygen sensor information decryption circuit diagram part);

[0057] Figure 4Output waveform of front and rear oxygen sensor information (vehicle engine speed 2600 rpm);

[0058] Figure 5 Encrypted transmission waveform for front and rear oxygen sensor information input;

[0059] Figure 6 Based on Figure 3 The front and rear oxygen sensors will misdecrypt information when only adjusting the resistance;

[0060] Figure 7 Based on Figure 3 The front and rear oxygen sensors correctly decrypt the information. DETAILED DESCRIPTION

[0061] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0062] The present invention provides a chaotic encryption system circuit for information of a pre-muffler oxygen sensor of an automobile. Figure 1 As shown, including:

[0063] An encryption circuit module of an encryption system and a decryption circuit module of an encryption system connected to each other;

[0064] The encryption circuit module of the encryption system includes a car front oxygen sensor connection circuit, a car rear oxygen sensor connection circuit, an encryption circuit 1, a JERK chaotic circuit 1 and an encryption circuit 2; the decryption circuit module of the encryption system includes a decryption circuit 1, a JERK chaotic circuit 2 and a decryption circuit 2; the car front oxygen sensor connection circuit is connected to the encryption circuit 1, the car rear oxygen sensor connection circuit is connected to the encryption circuit 2, the encryption circuit 1 and the encryption circuit 2 are connected to the JERK chaotic circuit 1; the decryption circuit 1 and the decryption circuit 2 are connected to the JERK chaotic circuit 2;

[0065] The encryption circuit module of the encryption system is used to encrypt the front oxygen sensor output information output by the front oxygen sensor connection circuit of the automobile and the rear oxygen sensor output information output by the rear oxygen sensor connection circuit of the automobile respectively. The decryption circuit module of the encryption system is used to decrypt the front oxygen sensor output information and the rear oxygen sensor output information respectively, so as to realize the decryption of the front oxygen sensor output information and the rear oxygen sensor output information after chaotic encrypted transmission.

[0066] The working principle of the above technical scheme is: in order to realize the chaotic encryption system circuit of the front oxygen sensor information of the automobile muffler, the present invention proposes an encryption circuit module of the encryption system and a decryption circuit module of the encryption system that are connected to each other; wherein, the encryption circuit module of the encryption system includes a front oxygen sensor connection circuit of the automobile, a rear oxygen sensor connection circuit of the automobile, an encryption circuit 1, a JERK chaotic circuit 1 and an encryption circuit 2; the decryption circuit module of the encryption system includes a decryption circuit 1, a JERK chaotic circuit 2 and a decryption circuit 2; the front oxygen sensor connection circuit of the automobile is connected to the encryption circuit 1, the rear oxygen sensor connection circuit of the automobile is connected to the encryption circuit 2, and the encryption circuit 1 and the encryption circuit 2 are connected to the JERK chaotic circuit 1; the decryption circuit 1 and the decryption circuit 2 are connected to the JERK chaotic circuit 2; the encryption circuit module of the encryption system is used to encrypt the front oxygen sensor output information output by the front oxygen sensor connection circuit of the automobile and the rear oxygen sensor output information output by the rear oxygen sensor connection circuit of the automobile respectively, and the decryption circuit module of the encryption system is used to decrypt the front oxygen sensor output information and the rear oxygen sensor output information respectively, so as to realize the decryption of the front oxygen sensor output information and the rear oxygen sensor output information after the chaotic encrypted transmission.

[0067] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, through the encryption circuit module of the encryption system and the decryption circuit module of the encryption system that are interconnected, the continuous analog chaotic voltage signal generated by the chaotic oscillation circuit is used as the carrier signal for encrypting the front and rear oxygen sensor information, and can be directly encrypted with the analog voltage information output by the front and rear oxygen sensors, without the need to use a digital processor to design encryption information, thereby realizing encryption protection of the front oxygen sensor information.

[0068] In one embodiment, Figure 2 , Figure 3 As shown, the JERK chaotic circuit 1 includes multiple resistors, multiple operational amplifiers and multiple capacitors; the multiple resistors are: resistor R 1 , resistor R 2 , resistor R 3 , resistor R 4 , resistor R 5 , resistor R 6 , resistor R 7 , resistor R 8 , resistor R 9 , resistor R 10 , resistor R 11 , resistor R 12 , resistor R 13 and resistor R 14 , multiple operational amplifiers are: operational amplifier OP 1 , Operational Amplifier OP 2 , Operational Amplifier OP 3 , Operational Amplifier OP4 , Operational Amplifier OP 5 , Operational Amplifier OP 6 , Operational Amplifier OP 7 and operational amplifier OP 8 , multiple capacitors are: Capacitor C 1 , capacitor C 2 and capacitor C 3 ;

[0069] The JERK chaotic circuit 1 forms a chaotic signal-x channel, a chaotic signal-y channel and a chaotic signal-z channel for encryption; the chaotic signal-x channel, the chaotic signal-y channel and the chaotic signal-z channel are used to combine the output signal with a plurality of resistors and a plurality of operational amplifiers to form a sign function circuit, and the sign function circuit is used to generate a post-feedback to the input ends of the chaotic signal-x channel, the chaotic signal-y channel and the chaotic signal-z channel, respectively, to generate an autonomous oscillating chaotic circuit;

[0070] The encryption circuit 1 includes a resistor R 15 , resistor R 16 , resistor R 17 , resistor R 18 , resistor R 23 , resistor R 24 , resistor R 25 and resistor R 26 , and the operational amplifier OP 9 and operational amplifier OP 11 , and the first waveform recorder;

[0071] The encryption circuit 2 includes a resistor R 19 , resistor R 20 , resistor R 21 , resistor R 22 , resistor R 27 , resistor R 28 , resistor R 29 and resistor R 30 , and the operational amplifier OP 10 and operational amplifier OP 12 .

[0072] The working principle of the above technical solution is as follows: the present invention designs a JERK chaotic circuit 1 to realize the formation of encrypted chaotic signal-x channel, chaotic signal-y channel and chaotic signal-z channel; the function of the JERK chaotic circuit 1 is realized by the composition of multiple resistors, multiple operational amplifiers and multiple capacitors; the multiple resistors include resistor R 1 , resistor R 2 , resistor R 3 , resistor R 4 , resistor R 5 , resistor R6 , resistor R 7 , resistor R 8 , resistor R 9 , resistor R 10 , resistor R 11 , resistor R 12 , resistor R 13 and resistor R 14 , a plurality of operational amplifiers including an operational amplifier OP 1 , Operational Amplifier OP 2 , Operational Amplifier OP 3 , Operational Amplifier OP 4 , Operational Amplifier OP 5 , Operational Amplifier OP 6 , Operational Amplifier OP 7 and operational amplifier OP 8 , multiple capacitors including capacitor C 1 , capacitor C 2 and capacitor C 3 ; Wherein, the chaotic signal-x channel, the chaotic signal-y channel and the chaotic signal-z channel are used to form a sign function circuit by combining the output signal with multiple resistors and multiple operational amplifiers, and the sign function circuit is used to generate post-feedback, which is respectively given to the input ends of the chaotic signal-x channel, the chaotic signal-y channel and the chaotic signal-z channel to generate an autonomous oscillating chaotic circuit;

[0073] The encryption circuit 1 designed by the present invention includes a resistor R 15 , resistor R 16 , resistor R 17 , resistor R 18 , resistor R 23 , resistor R 24 , resistor R 25 and resistor R 26 , and the operational amplifier OP 9 and operational amplifier OP 11 , and a first waveform recorder; the encryption circuit 2 includes a resistor R 19 , resistor R 20 , resistor R 21 , resistor R 22 , resistor R 27 , resistor R 28 , resistor R 29 and resistor R 30 , and the operational amplifier OP 10 and operational amplifier OP 12 .

[0074] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by designing JERK chaotic circuit 1, encryption circuit 1 and encryption circuit 2, the encryption functions of JERK chaotic circuit 1, encryption circuit 1 and encryption circuit 2 can be realized, thereby completing the encryption operation of the front oxygen sensor information.

[0075] In one embodiment, a vehicle front oxygen sensor connection circuit includes a front oxygen sensor, a vehicle electronic control unit A, and a fuel rod relay A;

[0076] The positive terminal 1 of the heater in the front oxygen sensor is connected to the terminal 3 of the fuel rod relay A, and the negative terminal 2 of the heater in the front oxygen sensor is grounded;

[0077] The output signal terminal 3 of the front oxygen sensor is connected to the terminal 2 of the automobile electronic control unit A, and the negative terminal 4 of the front oxygen sensor signal line is connected to the ground terminal 1 of the automobile electronic control unit A; the terminal 4 of the fuel rod relay A is connected to the positive 12V of the automobile power supply, and the terminals 1 and 2 of the fuel rod relay A are connected in parallel to the power supply terminal of the automobile engine;

[0078] The output signal of the front oxygen sensor 3 passes through the resistor R 17 Connecting the operational amplifier OP 9 The same-phase input terminal, the car power supply negative 12V passes through the resistor R 18 Connect to the non-inverting input terminal of operational amplifier OP9;

[0079] The car power ground wire passes through the resistor R 15 Connect to the operational amplifier OP 9 The inverting input of the operational amplifier OP 9 The inverting input is connected through the resistor R 16 Connecting the operational amplifier OP 9 The output of the operational amplifier OP 9 The output terminal passes through the resistor R 25 Connecting the operational amplifier OP 11 Non-inverting input terminal, chaotic signal-x channel operational amplifier OP 2 The output terminal is connected to the operational amplifier OP through the resistor R26. 11 The common-mode input terminal, the car power ground wire passes through the resistor R 24 Connect to the operational amplifier OP 11 Inverting input terminal, operational amplifier OP 11 The inverting input is connected through the resistor R 23 Connect to the operational amplifier OP 11 Output terminal, operational amplifier OP 11 The output end is connected to the self-locking button K 1 The third end of the self-locking button K 1 Connect the 1st end of the front oxygen sensor output signal 3, and the K of the self-locking button1 The second end is connected to the K of the self-locking button 1 The 4th end of the self-locking button K 1 The second end is connected to the signal channel 1 of the first waveform recorder to store the recorded waveform.

[0080] The working principle of the above technical solution is as follows: the automobile front oxygen sensor connection circuit designed by the present invention comprises a front oxygen sensor, an automobile electronic control unit A and a fuel rod relay A; wherein the specific connection relationship between the front oxygen sensor, the automobile electronic control unit A and the fuel rod relay A is as follows: the positive electrode 1 end of the heater in the front oxygen sensor is connected to the 3 end of the fuel rod relay A, and the negative electrode 2 end of the heater in the front oxygen sensor is grounded; the output signal 3 end of the front oxygen sensor is connected to the 2 end of the automobile electronic control unit A, and the negative electrode 4 end of the front oxygen sensor signal line is connected to the ground 1 end of the automobile electronic control unit A; the 4 end of the fuel rod relay A is connected to the positive 12V of the automobile power supply, and the 1 end and the 2 end of the fuel rod relay A are connected in parallel to the power supply end of the automobile engine; the output signal 3 end of the front oxygen sensor is connected to the ground 1 end of the automobile electronic control unit A through the resistor R 17 Connecting the operational amplifier OP 9 The same-phase input terminal, the car power supply negative 12V passes through the resistor R 18 Connect to the non-inverting input of the operational amplifier OP9; the car power ground wire passes through the resistor R 15 Connect to the operational amplifier OP 9 The inverting input of the operational amplifier OP 9 The inverting input is connected through the resistor R 16 Connecting the operational amplifier OP 9 The output of the operational amplifier OP 9 The output terminal passes through the resistor R 25 Connecting the operational amplifier OP 11 Non-inverting input terminal, chaotic signal-x channel operational amplifier OP 2 The output terminal is connected to the operational amplifier OP through the resistor R26. 11 The common-mode input terminal, the car power ground wire passes through the resistor R 24 Connect to the operational amplifier OP 11 Inverting input terminal, operational amplifier OP 11 The inverting input is connected through the resistor R 23 Connect to the operational amplifier OP 11 Output terminal, operational amplifier OP 11 The output end is connected to the self-locking button K 1 The third end of the self-locking button K 1 Connect the 1st end of the front oxygen sensor output signal 3, and the K of the self-locking button 1 The second end is connected to the K of the self-locking button 1 The 4th end of the self-locking button K 1The second end is connected to the signal channel 1 of the first waveform recorder to store the recorded waveform.

[0081] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the function of the automobile front oxygen sensor connection circuit can be realized through a specific connection relationship.

[0082] In one embodiment, a vehicle rear oxygen sensor connection circuit includes a rear oxygen sensor, a vehicle electronic control unit B, and a fuel rod relay B;

[0083] The positive terminal 1 of the heater in the rear oxygen sensor is connected to the terminal 3 of the fuel rod relay B, the negative terminal 2 of the heater in the rear oxygen sensor is grounded, the output signal terminal 3 of the rear oxygen sensor is connected to the terminal 2 of the automobile electronic control unit B, and the negative terminal 4 of the rear oxygen sensor signal line is connected to the ground terminal 1 of the automobile electronic control unit B; the terminal 4 of the fuel rod relay B is connected to the positive 12V of the automobile power supply, and the terminals 1 and 2 of the fuel rod relay B are connected in parallel to the power supply terminal of the automobile engine;

[0084] The output signal of the rear oxygen sensor 3 passes through the resistor R 21 Connecting the operational amplifier OP 10 The same-phase input terminal, the car power supply negative 12V passes through the resistor R 22 Connect to the operational amplifier OP 10 The non-inverting input terminal of the vehicle power supply is connected to the ground wire through the resistor R 19 Connect to the operational amplifier OP 10 Inverting input terminal, operational amplifier OP 10 The inverting input is connected through the resistor R 20 Connecting the operational amplifier OP 10 Output terminal, operational amplifier OP 10 The output terminal passes through the resistor R 29 Connecting the operational amplifier OP 12 Non-inverting input terminal, chaotic signal-z channel operational amplifier OP 6 The output terminal is connected to the operational amplifier OP through the resistor R30. 12 The common-mode input terminal, the car power ground wire passes through the resistor R 27 Connect to the operational amplifier OP 12 Inverting input terminal, operational amplifier OP 12 The inverting input is connected through the resistor R 28 Connect to the operational amplifier OP 12 Output terminal, operational amplifier OP 12 The output end is connected to the self-locking button K 2 The third end of the self-locking button K 2 The first end is connected to the output signal terminal 3 of the rear oxygen sensor, and the K of the self-locking button 2 The second end is connected to the K of the self-locking button 2The 4th end of the self-locking button K 2 The fourth end is connected to the signal channel 2 of the first waveform recorder to store the recorded waveform;

[0085] Self-locking button K 1 When not pressed, the signal channel 1 of the first waveform recorder stores the unencrypted output information of the front oxygen sensor, and the signal channel 2 stores the unencrypted output information of the rear oxygen sensor;

[0086] Self-locking button K 2 When pressed, the first waveform recorder signal channel 1 stores the chaotic encrypted information output by the front oxygen sensor, and the first waveform recorder signal channel 2 stores the chaotic encrypted information output by the rear oxygen sensor;

[0087] On the self-locking button K 1 And self-locking button K 2 If both buttons are pressed and the correct encryption key is not obtained, the information of the car's pre-muffler oxygen sensor cannot be obtained, so that the car's engine status can be protected, thereby ensuring that the privacy of the driver's braking status of the car is not stolen.

[0088] The working principle of the above technical solution is as follows: the automobile rear oxygen sensor connection circuit designed by the present invention includes a rear oxygen sensor, an automobile electronic control unit B and a fuel rod relay B; its connection structure is as follows: the positive electrode 1 end of the heater in the rear oxygen sensor is connected to the 3 end of the fuel rod relay B, the negative electrode 2 end of the heater in the rear oxygen sensor is grounded, the output signal 3 end of the rear oxygen sensor is connected to the 2 end of the automobile electronic control unit B, and the negative electrode 4 end of the rear oxygen sensor signal line is connected to the ground 1 end of the automobile electronic control unit B; the 4 end of the fuel rod relay B is connected to the positive 12V of the automobile power supply, and the 1 end and the 2 end of the fuel rod relay B are connected in parallel to the power supply end of the automobile engine; the output signal 3 end of the rear oxygen sensor is connected to the ground 1 end of the automobile electronic control unit B through the resistor R 21 Connecting the operational amplifier OP 10 The same-phase input terminal, the car power supply negative 12V passes through the resistor R 22 Connect to the operational amplifier OP 10 The non-inverting input terminal of the vehicle power supply is connected to the ground wire through the resistor R 19 Connect to the operational amplifier OP 10 Inverting input terminal, operational amplifier OP 10 The inverting input is connected through the resistor R 20 Connecting the operational amplifier OP 10 Output terminal, operational amplifier OP 10 The output terminal is connected through the resistor R 29 Connecting the operational amplifier OP 12 Non-inverting input terminal, chaotic signal-z channel operational amplifier OP 6 The output terminal is connected to the operational amplifier OP through the resistor R30.12 The common-mode input terminal, the car power ground wire passes through the resistor R 27 Connect to the operational amplifier OP 12 Inverting input terminal, operational amplifier OP 12 The inverting input is connected through the resistor R 28 Connect to the operational amplifier OP 12 Output terminal, operational amplifier OP 12 The output end is connected to the self-locking button K 2 The third end of the self-locking button K 2 The first end is connected to the output signal terminal 3 of the rear oxygen sensor, and the K of the self-locking button 2 The second end is connected to the K of the self-locking button 2 The 4th end of the self-locking button K 2 The fourth end is connected to the signal channel 2 of the first waveform recorder to store the recorded waveform; the self-locking button K 1 When not pressed, the signal channel 1 of the first waveform recorder stores the unencrypted output information of the front oxygen sensor, and the signal channel 2 stores the unencrypted output information of the rear oxygen sensor; the self-locking button K 2 When pressed, the first waveform recorder signal channel 1 stores the chaotic encrypted information output by the front oxygen sensor, and the first waveform recorder signal channel 2 stores the chaotic encrypted information output by the rear oxygen sensor; 1 And self-locking button K 2 If both buttons are pressed and the correct encryption key is not obtained, the information of the car's pre-muffler oxygen sensor cannot be obtained, so that the car's engine status can be protected, thereby ensuring that the privacy of the driver's braking status of the car is not stolen.

[0089] The beneficial effect of the above technical solution is: by adopting the solution provided by this embodiment, the output signal of the rear oxygen sensor can be encrypted through the connection of the automobile rear oxygen sensor connection circuit.

[0090] In one embodiment, the operational amplifier OP 3 The output terminal is connected through the resistor R 3 Connecting the operational amplifier OP 2 Inverting input terminal, operational amplifier OP 2 The inverting input is connected through capacitor C 1 Connecting the operational amplifier OP 2 Output end, front oxygen sensor information chaos encryption operational amplifier OP 11 The output terminal is connected through the resistor R 1 Connecting the operational amplifier OP 1 The inverting input of the operational amplifier OP 1 The non-inverting input terminal is grounded, and the operational amplifier OP 1 The inverting input is connected through the resistor R2 Connecting the operational amplifier OP 1 The output end forms the -x channel of the chaotic signal of the front oxygen sensor output information;

[0091] Operational Amplifier OP 5 The output terminal is connected through the resistor R 4 Connect to the operational amplifier OP 3 Inverting input terminal, operational amplifier OP 3 The non-inverting input terminal is grounded, and the operational amplifier OP 3 The inverting input is connected through capacitor C 2 Connect to the operational amplifier OP 3 The output end forms the -y channel of the chaotic signal;

[0092] Operational amplifier OP for chaotic encryption of front oxygen sensor information 11 The output terminal is connected to the operational amplifier OP 7 The inverting input of the operational amplifier OP 7 The non-inverting input terminal of the operational amplifier OP is grounded. 7 The output terminal is connected through the resistor R 13 Connect to the operational amplifier OP 8 Inverting input terminal, operational amplifier OP 8 The inverting input is connected through the resistor R 14 Connect to the operational amplifier OP 8 Output terminal, operational amplifier OP 8 The non-inverting input terminal is grounded, and the operational amplifier OP 3 The output terminal is connected through an adjustable resistor R 5 Connecting the operational amplifier OP 4 Inverting input terminal, operational amplifier OP 1 The output terminal is connected through an adjustable resistor R 6 Connecting the operational amplifier OP 4 Inverting input terminal, operational amplifier OP 8 The output terminal is connected through an adjustable resistor R 7 Connecting the operational amplifier OP 4 Inverting input terminal;

[0093] Operational amplifier OP for chaotic encryption of rear oxygen sensor information 12 The output terminal is connected through an adjustable resistor R 8 Connecting the operational amplifier OP 4 Inverting input terminal, operational amplifier OP 4 The inverting input is connected through an adjustable resistor R 9 Connecting the operational amplifier OP 4 Output terminal, operational amplifier OP 4 The output terminal is connected through the resistor R 10 Connect to the operational amplifier OP5 Inverting input terminal, operational amplifier OP 5 The non-inverting input terminal is grounded, and the operational amplifier OP 5 The inverting input is connected through capacitor C 3 Connect to the operational amplifier OP 5 Output terminal, operational amplifier OP 5 The output terminal passes through the resistor R 11 Connect to the operational amplifier OP 6 Inverting input terminal, operational amplifier OP 6 The non-inverting input terminal is grounded, and the operational amplifier OP 6 The inverting input is connected through the resistor R 12 Connect to the operational amplifier OP 6 The output end forms the -z channel of the chaotic signal of the output information of the rear oxygen sensor;

[0094] Operational Amplifier OP 11 The output end of the operational amplifier OP12 is connected to the wire jack J2.

[0095] Figure 4 The following is a sine waveform diagram of the information output by the front and rear oxygen sensors when the engine speed is 2600 rpm. Figure 5 This is the chaotic encrypted information of the front and rear oxygen sensors. It shows the waveform of the front and rear oxygen sensor information completely integrated into the chaotic signal generated by the -x channel and -z channel of the JERK chaotic oscillator circuit. Figure 4 The waveform is completely different.

[0096] The working principle of the above technical solution is as follows: This embodiment is a connection structure relationship of the JERK chaotic circuit 1, specifically: the operational amplifier OP 3 The output terminal passes through the resistor R 3 Connecting the operational amplifier OP 2 Inverting input terminal, operational amplifier OP 2 The inverting input is connected through capacitor C 1 Connecting the operational amplifier OP 2 Output end, operational amplifier OP for chaotic encryption of front oxygen sensor information 11 The output terminal passes through the resistor R 1 Connecting the operational amplifier OP 1 The inverting input of the operational amplifier OP 1 The non-inverting input terminal is grounded, and the operational amplifier OP 1 The inverting input is connected through the resistor R 2 Connecting the operational amplifier OP 1 Output end, forming the -x channel of the chaotic signal of the front oxygen sensor output information; operational amplifier OP 5 The output terminal is connected through the resistor R4 Connect to the operational amplifier OP 3 Inverting input terminal, operational amplifier OP 3 The non-inverting input terminal is grounded, and the operational amplifier OP 3 The inverting input is connected through capacitor C 2 Connect to the operational amplifier OP 3 The output end forms the -y channel of the chaotic signal; the operational amplifier OP of the front oxygen sensor information chaos encryption 11 The output terminal is connected to the operational amplifier OP 7 The inverting input of the operational amplifier OP 7 The non-inverting input terminal of the operational amplifier OP is grounded. 7 The output terminal is connected through the resistor R 13 Connect to the operational amplifier OP 8 Inverting input terminal, operational amplifier OP 8 The inverting input is connected through the resistor R 14 Connect to the operational amplifier OP 8 Output terminal, operational amplifier OP 8 The non-inverting input terminal is grounded, and the operational amplifier OP 3 The output terminal is connected through an adjustable resistor R 5 Connecting the operational amplifier OP 4 Inverting input terminal, operational amplifier OP 1 The output terminal is connected through an adjustable resistor R 6 Connecting the operational amplifier OP 4 Inverting input terminal, operational amplifier OP 8 The output terminal is connected through an adjustable resistor R 7 Connecting the operational amplifier OP 4 Inverting input terminal; operational amplifier OP for chaotic encryption of rear oxygen sensor information 12 The output terminal is connected through an adjustable resistor R 8 Connecting the operational amplifier OP 4 Inverting input terminal, operational amplifier OP 4 The inverting input is connected through an adjustable resistor R 9 Connecting the operational amplifier OP 4 Output terminal, operational amplifier OP 4 The output terminal is connected through the resistor R 10 Connect to the operational amplifier OP 5 Inverting input terminal, operational amplifier OP 5 The non-inverting input terminal is grounded, and the operational amplifier OP 5 The inverting input is connected through capacitor C 3 Connect to the operational amplifier OP 5 Output terminal, operational amplifier OP 5 The output terminal is connected through the resistor R 11 Connect to the operational amplifier OP6 Inverting input terminal, operational amplifier OP 6 The non-inverting input terminal is grounded, and the operational amplifier OP 6 The inverting input is connected through the resistor R 12 Connect to the operational amplifier OP 6 The output end forms the -z channel of the chaotic signal of the oxygen sensor output information; the operational amplifier OP 11 The output terminal of the cable is connected to the J jack 1 , Operational Amplifier OP 12 The output terminal of the cable is connected to the J jack 2 .

[0097] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the circuit function of the JERK chaotic circuit 1 can be guaranteed to be realized through specific structural connection.

[0098] In one embodiment, the JERK chaotic circuit 2 includes a resistor R 41 , resistor R 42 , resistor R 43 , resistor R 44 , resistor R 45 , resistor R 46 , resistor R 47 , resistor R 48 , resistor R 49 , resistor R 50 , resistor R 51 , resistor R 52 Resistor R 53 and resistor R 54 ; and operational amplifier OP 21 , Operational Amplifier OP 22 , Operational Amplifier OP 23 , Operational Amplifier OP 24 , Operational Amplifier OP 25 , Operational Amplifier OP 26 , Operational Amplifier OP 27 , Operational Amplifier OP 28 ; and capacitor C 4 , capacitor C 5 and capacitor C 6 ; Among them, the resistor R 45 , resistor R 46 , resistor R 47 , resistor R 48 , resistor R 49 The resistance value of the resistor R 5 , resistor R 6 , resistor R 7 , resistor R 8 , resistor R 9 The resistance values ​​are exactly the same;

[0099] Decryption circuit 1 and decryption circuit 2 include resistor R 55 , resistor R 56 , resistor R 57 , resistor R 58 , resistor R 59 , resistor R 60 , resistor R 61 , resistor R 62 , resistor R 63 and resistor R 64 , and the operational amplifier OP 29 , Operational Amplifier OP 30 and operational amplifier OP 31 , and a second waveform recorder;

[0100] The JERK chaotic circuit 2 forms a -x' channel chaotic signal for decryption, a -y' channel chaotic signal for decryption, and a -z' channel chaotic signal for decryption.

[0101] The working principle of the above technical solution is as follows: the JERK chaotic circuit 2 designed by the present invention includes a resistor R 41 , resistor R 42 , resistor R 43 , resistor R 44 , resistor R 45 , resistor R 46 , resistor R 47 , resistor R 48 , resistor R 49 , resistor R 50 , resistor R 51 , resistor R 52 Resistor R 53 and resistor R 54 ; and operational amplifier OP 21 , Operational Amplifier OP 22 , Operational Amplifier OP 23 , Operational Amplifier OP 24 , Operational Amplifier OP 25 , Operational Amplifier OP 26 , Operational Amplifier OP 27 , Operational Amplifier OP 28 ; and capacitor C 4 , capacitor C 5 and capacitor C 6 ; Decryption circuit 1 and decryption circuit 2 include resistor R 55 , resistor R 56 , resistor R 57 , resistor R 58 , resistor R 59 , resistor R 60 , resistor R61 , resistor R 62 , resistor R 63 and resistor R 64 , and the operational amplifier OP 29 , Operational Amplifier OP 30 and operational amplifier OP 31 , and a second waveform recorder; the JERK chaotic circuit 2 forms a -x′ channel chaotic signal for decryption, a -y′ channel chaotic signal for decryption, and a -z′ channel chaotic signal for decryption.

[0102] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by designing specific circuit components of the JERK chaotic circuit 2, the function of the JERK chaotic circuit 2 can be guaranteed.

[0103] In one embodiment, the operational amplifier OP 23 The output terminal is connected through the resistor R 41 Connect to the operational amplifier OP 21 Inverting input terminal, operational amplifier OP 21 The non-inverting input terminal is grounded, and the operational amplifier OP 21 The inverting input is connected through capacitor C 4 Connecting the operational amplifier OP 21 Output terminal, operational amplifier OP 21 The output terminal is connected through the resistor R 42 Connect to the operational amplifier OP 22 Inverting input terminal, operational amplifier OP 22 The non-inverting input terminal is grounded, and the operational amplifier OP 22 The inverting input is connected through the resistor R 43 Connecting the operational amplifier OP 22 The output end forms a chaotic signal of the -x′ channel of the front oxygen sensor output information decryption chaotic circuit;

[0104] Operational Amplifier OP 25 The output terminal is connected through the resistor R 44 Connect to the operational amplifier OP 23 Inverting input terminal, operational amplifier OP 23 The non-inverting input terminal is grounded, and the operational amplifier OP 23 The inverting input is connected through capacitor C 5 Connecting the operational amplifier OP 23 At the output end, a chaotic signal of the -y′ channel of the chaotic circuit for decrypting the information of the front and rear oxygen sensors is formed;

[0105] Operational Amplifier OP 23 The output terminal is connected through an adjustable resistor R 45 Connect to the operational amplifier OP 24Inverting input terminal, operational amplifier OP 29 The output terminal is connected through an adjustable resistor R 46 Connect to the operational amplifier OP 24 Inverting input terminal, operational amplifier OP 28 The output terminal is connected through an adjustable resistor R 47 Connect to the operational amplifier OP 24 Inverting input terminal, wire jack J 4 Through the adjustable resistor R 48 Connect to the operational amplifier OP 24 Inverting input terminal, operational amplifier OP 24 The non-inverting input terminal is grounded, and the operational amplifier OP 24 The inverting input is connected through an adjustable resistor R 49 Connect to the operational amplifier OP 24 Output terminal, operational amplifier OP 24 The output terminal passes through the resistor R 50 Connect to the operational amplifier OP 25 Inverting input terminal, operational amplifier OP 25 The non-inverting input terminal is grounded, and the operational amplifier OP 25 The inverting input is connected through capacitor C 6 Connecting the operational amplifier OP 25 Output terminal, operational amplifier OP 25 The output terminal passes through the resistor R 51 Connect to the operational amplifier OP 26 Inverting input terminal, operational amplifier OP 26 The non-inverting input terminal is grounded, and the operational amplifier OP 26 The inverting input is connected through the resistor R 52 Connecting the operational amplifier OP 26 At the output end, a -z′ channel chaotic signal of the front oxygen sensor output information decryption chaotic circuit is formed.

[0106] Only fine-tuning resistor R 49 When it is 5.9KΩ, Figure 6 This is the waveform of the wrong decryption of the chaotic encrypted information of the front and rear oxygen sensors. Figure 4 They are completely different and cannot completely and correctly restore the front and rear oxygen sensor information output waveform when the car engine speed is 2600 rpm. Figure 7 The correct front and rear oxygen sensor chaotic decryption information is output, and its waveform is similar to Figure 4 Totally consistent.

[0107] The working principle of the above technical solution is as follows: The connection relationship of the specific components of the JERK chaotic circuit 2 of the present invention is as follows: the operational amplifier OP 23 The output terminal passes through the resistor R 41 Connect to the operational amplifier OP21 Inverting input terminal, operational amplifier OP 21 The non-inverting input terminal is grounded, and the operational amplifier OP 21 The inverting input is connected through capacitor C 4 Connecting the operational amplifier OP 21 Output terminal, operational amplifier OP 21 The output terminal is connected through the resistor R 42 Connect to the operational amplifier OP 22 Inverting input terminal, operational amplifier OP 22 The non-inverting input terminal is grounded, and the operational amplifier OP 22 The inverting input is connected through the resistor R 43 Connecting the operational amplifier OP 22 Output end, forming the -x′ channel chaotic signal of the front oxygen sensor output information decryption chaotic circuit; operational amplifier OP 25 The output terminal is connected through the resistor R 44 Connect to the operational amplifier OP 23 Inverting input terminal, operational amplifier OP 23 The non-inverting input terminal is grounded, and the operational amplifier OP 23 The inverting input is connected through capacitor C 5 Connecting the operational amplifier OP 23 The output end forms the -y′ channel chaotic signal of the chaotic circuit for decrypting the information of the front and rear oxygen sensors; the operational amplifier OP 23 The output terminal is connected through an adjustable resistor R 45 Connect to the operational amplifier OP 24 Inverting input terminal, operational amplifier OP 29 The output terminal is connected through an adjustable resistor R 46 Connect to the operational amplifier OP 24 Inverting input terminal, operational amplifier OP 28 The output terminal is connected through an adjustable resistor R 47 Connect to the operational amplifier OP 24 Inverting input terminal, wire jack J 4 Through the adjustable resistor R 48 Connect to the operational amplifier OP 24 Inverting input terminal, operational amplifier OP 24 The non-inverting input terminal is grounded, and the operational amplifier OP 24 The inverting input is connected through an adjustable resistor R 49 Connect to the operational amplifier OP 24 Output terminal, operational amplifier OP 24 The output terminal is connected through the resistor R 50 Connect to the operational amplifier OP 25 Inverting input terminal, operational amplifier OP 25 The non-inverting input terminal is grounded, and the operational amplifier OP25 The inverting input is connected through capacitor C 6 Connecting the operational amplifier OP 25 Output terminal, operational amplifier OP 25 The output terminal is connected through the resistor R 51 Connect to the operational amplifier OP 26 Inverting input terminal, operational amplifier OP 26 The non-inverting input terminal is grounded, and the operational amplifier OP 26 The inverting input is connected through the resistor R 52 Connecting the operational amplifier OP 26 At the output end, a -z′ channel chaotic signal of the front oxygen sensor output information decryption chaotic circuit is formed.

[0108] The beneficial effect of the above technical solution is: adopting the solution provided in this embodiment, through the specific connection relationship of the specific components of the JERK chaotic circuit 2, it can provide a basis for the functional realization of the JERK chaotic circuit 2.

[0109] In one embodiment, the wire jack J 3 Through the resistor R 55 Connect to the operational amplifier OP 29 Inverting input terminal, operational amplifier OP 29 The non-inverting input terminal is grounded, and the operational amplifier OP 29 The inverting input is connected through the resistor R 56 Connecting the operational amplifier OP 29 Output terminal, wire jack J 3 Connecting the operational amplifier OP 27 Inverting input terminal, operational amplifier OP 27 The non-inverting input terminal is grounded, and the operational amplifier OP 27 The output terminal is connected through the resistor R 53 Connect to the operational amplifier OP 28 Inverting input terminal, operational amplifier OP 28 The non-inverting input terminal is grounded, and the operational amplifier OP 28 The inverting input is connected through the resistor R 54 Connecting the operational amplifier OP 28 Output terminal, operational amplifier OP 22 The output terminal is connected through the resistor R 57 Connect to the operational amplifier OP 30 Inverting input terminal, operational amplifier OP 30 The inverting input is connected through the resistor R 60 Connecting the operational amplifier OP 30 Output terminal, operational amplifier OP 29 The output terminal is connected through the resistor R 58 Connect to the operational amplifier OP 30Non-inverting input terminal, operational amplifier OP 30 The non-inverting input is connected through the resistor R 59 Ground, operational amplifier OP 30 The output terminal outputs the decrypted front oxygen sensor information and connects to the signal channel 1 of the second waveform recorder;

[0110] Cable jack J 4 Through the resistor R 61 Connect to the operational amplifier OP 31 Inverting input terminal, operational amplifier OP 31 The inverting input is connected through the resistor R 62 Connecting the operational amplifier OP 31 Output terminal, operational amplifier OP 26 The output terminal passes through the resistor R 63 Connect to the operational amplifier OP 31 Non-inverting input terminal, operational amplifier OP 31 The non-inverting input is connected through the resistor R 64 Ground, operational amplifier OP 31 The output end outputs the decrypted rear oxygen sensor information and connects to the signal channel 2 of the second waveform recorder.

[0111] The working principle of the above technical solution is: the connection structure of the front and rear oxygen sensor information decryption circuit of the present invention is: the wire jack J 3 Through the resistor R 55 Connect to the operational amplifier OP 29 Inverting input terminal, operational amplifier OP 29 The non-inverting input terminal is grounded, and the operational amplifier OP 29 The inverting input is connected through the resistor R 56 Connecting the operational amplifier OP 29 Output terminal, wire jack J 3 Connecting the operational amplifier OP 27 Inverting input terminal, operational amplifier OP 27 The non-inverting input terminal is grounded, and the operational amplifier OP 27 The output terminal passes through the resistor R 53 Connect to the operational amplifier OP 28 Inverting input terminal, operational amplifier OP 28 The non-inverting input terminal is grounded, and the operational amplifier OP 28 The inverting input is connected through the resistor R 54 Connecting the operational amplifier OP 28 Output terminal, operational amplifier OP 22 The output terminal passes through the resistor R 57 Connect to the operational amplifier OP 30 Inverting input terminal, operational amplifier OP 30 The inverting input is connected through the resistor R60 Connecting the operational amplifier OP 30 Output terminal, operational amplifier OP 29 The output terminal is connected through the resistor R 58 Connect to the operational amplifier OP 30 Non-inverting input terminal, operational amplifier OP 30 The non-inverting input is connected through the resistor R 59 Ground, operational amplifier OP 30 The output terminal outputs the decrypted front oxygen sensor information and connects to the signal channel 1 of the second waveform recorder;

[0112] Cable jack J 4 Through the resistor R 61 Connect to the operational amplifier OP 31 Inverting input terminal, operational amplifier OP 31 The inverting input is connected through the resistor R 62 Connecting the operational amplifier OP 31 Output terminal, operational amplifier OP 26 The output terminal is connected through the resistor R 63 Connect to the operational amplifier OP 31 Non-inverting input terminal, operational amplifier OP 31 The non-inverting input is connected through the resistor R 64 Ground, operational amplifier OP 31 The output end outputs the decrypted rear oxygen sensor information and connects to the signal channel 2 of the second waveform recorder.

[0113] The beneficial effect of the above technical solution is: by adopting the solution provided by this embodiment, the front and rear oxygen sensor information decryption circuits are designed to realize the decryption of the front and rear oxygen sensor information.

[0114] In one embodiment, a first control circuit electrically connected to the JERK chaotic circuit 1 is further included, and based on the first control circuit, the resistance adjustment range of the adjustable resistor is adjusted to set the encryption key; specifically:

[0115] A first control circuit is provided which is electrically connected to the JERK chaotic circuit 1;

[0116] The first control circuit is used to adjust the adjustable resistor R according to the set adjustment method. 5 , adjustable resistor R 6 , adjustable resistor R 7 , adjustable resistor R 8 and adjustable resistor R 9 The adjustment range is used to obtain a plurality of resistance adjustment range values; the adjustment method is to adjust the resistance value of one resistor, two resistors, three resistors, four resistors or five resistors at will;

[0117] A plurality of groups of resistance adjustment amplitude values ​​are arranged and combined based on a set arrangement and combination template to obtain an arrangement and combination of resistance adjustment amplitude values, and the arrangement and combination of resistance adjustment amplitude values ​​are used as encryption keys for encryption in front and rear oxygen sensor information encryption circuits.

[0118] The working principle of the above technical solution is as follows: in order to realize the setting of the encryption key, the present invention designs a first control circuit electrically connected to the JERK chaotic circuit 1, and based on the first control circuit, adjusts the resistance value adjustment range of the control adjustable resistor, specifically: firstly set the first control circuit electrically connected to the JERK chaotic circuit 1; then use the first control circuit to adjust the control adjustable resistor R according to the set adjustment method 5 , adjustable resistor R 6 , adjustable resistor R 7 , adjustable resistor R 8 and adjustable resistor R 9 The adjustment amplitude is used to obtain several groups of resistance adjustment amplitude values; the adjustment method is to arbitrarily adjust the resistance value of one resistor, two resistors, three resistors, four resistors or five resistors; the several groups of resistance adjustment amplitude values ​​are arranged and combined based on the set arrangement and combination template to obtain the resistance adjustment amplitude value arrangement and combination, and the resistance adjustment amplitude value arrangement and combination are used as encryption keys to be used for encryption in the front and rear oxygen sensor information encryption circuit.

[0119] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, a plurality of different resistance adjustment amplitude values ​​can be obtained by adjusting and controlling the resistance adjustment amplitude of the adjustable resistor through the first control circuit, and a secure encryption key can be designed based on the plurality of resistance adjustment amplitude values.

[0120] In one embodiment, it also includes a voltage monitoring circuit and a voltage waveform signal linear adjustment circuit;

[0121] The voltage monitoring circuit is connected to the encryption circuit module of the encryption system and the decryption circuit module of the encryption system respectively, and the voltage signal detection circuit is connected to the first waveform recorder and the second waveform recorder respectively; the voltage signal monitoring circuit is used to monitor and obtain the voltage waveform signal in the output information of the front oxygen sensor and the output information of the rear oxygen sensor, and the encrypted voltage waveform signal obtained after the voltage waveform signal is encrypted, and display the voltage waveform signal and the encrypted voltage waveform signal based on the first waveform recorder;

[0122] The voltage signal monitoring circuit is also used to monitor and obtain the correctly decrypted voltage waveform signal in the front oxygen sensor output information and the rear oxygen sensor output information, and the incorrectly decrypted voltage waveform signal in the front oxygen sensor output information and the rear oxygen sensor output information, and display the correctly decrypted voltage waveform signal and the incorrectly decrypted voltage waveform signal based on the second waveform recorder;

[0123] The voltage waveform signal linear adjustment circuit is configured in the encryption circuit module of the encryption system and the decryption circuit module of the encryption system. The voltage waveform signal linear adjustment circuit is used to linearly adjust the voltage waveform signal in the front oxygen sensor output information and the rear oxygen sensor output information into a first voltage waveform signal whose waveform center point is zero and whose amplitude remains unchanged, and the first voltage waveform signal is used for encryption and decryption.

[0124] The working principle of the above technical solution is as follows: in order to monitor the voltage waveform signal in the output information of the front oxygen sensor and the output information of the rear oxygen sensor, and process the voltage waveform signal into a signal that is convenient for encryption, the present invention sets a voltage monitoring circuit and a voltage waveform signal linear adjustment circuit;

[0125] The voltage monitoring circuit is connected to the encryption circuit module of the encryption system and the decryption circuit module of the encryption system respectively, and the voltage signal detection circuit is connected to the first waveform recorder and the second waveform recorder respectively; the voltage signal monitoring circuit is used to monitor and obtain the voltage waveform signal in the output information of the front oxygen sensor and the output information of the rear oxygen sensor, and the encrypted voltage waveform signal obtained after the voltage waveform signal is encrypted, and display the voltage waveform signal and the encrypted voltage waveform signal based on the first waveform recorder;

[0126] The voltage signal monitoring circuit is also used to monitor and obtain the correctly decrypted voltage waveform signal in the front oxygen sensor output information and the rear oxygen sensor output information, and the incorrectly decrypted voltage waveform signal in the front oxygen sensor output information and the rear oxygen sensor output information, and display the correctly decrypted voltage waveform signal and the incorrectly decrypted voltage waveform signal based on the second waveform recorder;

[0127] The voltage waveform signal linear adjustment circuit is configured in the encryption circuit module of the encryption system and the decryption circuit module of the encryption system. The voltage waveform signal linear adjustment circuit is used to linearly adjust the voltage waveform signal in the front oxygen sensor output information and the rear oxygen sensor output information into a first voltage waveform signal whose waveform center point is zero and whose amplitude remains unchanged, and the first voltage waveform signal is used for encryption and decryption.

[0128] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by setting up a voltage monitoring circuit and a voltage waveform signal linear adjustment circuit, it is possible to monitor the voltage waveform signal in the front oxygen sensor output information and the rear oxygen sensor output information, and process the voltage waveform signal into a signal that is easy to encrypt.

[0129] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A chaotic encryption system circuit for information of a pre-muffler oxygen sensor of an automobile, characterized in that: include: An encryption circuit module of an encryption system and a decryption circuit module of an encryption system connected to each other; The encryption circuit module of the encryption system includes a car front oxygen sensor connection circuit, a car rear oxygen sensor connection circuit, an encryption circuit 1, a JERK chaotic circuit 1 and an encryption circuit 2; the decryption circuit module of the encryption system includes a decryption circuit 1, a JERK chaotic circuit 2 and a decryption circuit 2; the car front oxygen sensor connection circuit is connected to the encryption circuit 1, the car rear oxygen sensor connection circuit is connected to the encryption circuit 2, the encryption circuit 1 and the encryption circuit 2 are connected to the JERK chaotic circuit 1; the decryption circuit 1 and the decryption circuit 2 are connected to the JERK chaotic circuit 2; The encryption circuit module of the encryption system is used to encrypt the front oxygen sensor output information output by the front oxygen sensor connection circuit of the automobile and the rear oxygen sensor output information output by the rear oxygen sensor connection circuit of the automobile respectively, and the decryption circuit module of the encryption system is used to decrypt the front oxygen sensor output information and the rear oxygen sensor output information respectively, so as to realize the decryption of the front oxygen sensor output information and the rear oxygen sensor output information after chaotic encryption transmission; The encryption circuit module of the encryption system also includes a first control circuit electrically connected to the JERK chaotic circuit 1, and based on the first control circuit, adjusts the resistance value adjustment range of the adjustable resistor to set the encryption key; specifically: A first control circuit is provided which is electrically connected to the JERK chaotic circuit 1; Using the first control circuit, adjusting the adjustment amplitudes of the plurality of adjustable resistors according to a set adjustment method, to obtain a plurality of groups of resistance adjustment amplitude values; the adjustment method is to arbitrarily adjust the resistance values ​​of one resistor, two resistors, three resistors, four resistors or five resistors; Arrange and combine a plurality of groups of resistance adjustment amplitude values ​​based on a set arrangement and combination template to obtain an arrangement and combination of resistance adjustment amplitude values, and use the arrangement and combination of resistance adjustment amplitude values ​​as an encryption key to be used for encryption in a front and rear oxygen sensor information encryption circuit; The chaotic encryption system circuit also includes a voltage monitoring circuit; The voltage monitoring circuit is connected to the encryption circuit module of the encryption system and the decryption circuit module of the encryption system respectively, and the voltage monitoring circuit is connected to the first waveform recorder and the second waveform recorder respectively; the voltage monitoring circuit is used to monitor and obtain the voltage waveform signal in the output information of the front oxygen sensor and the output information of the rear oxygen sensor, and the encrypted voltage waveform signal obtained after the voltage waveform signal is encrypted, and display the voltage waveform signal and the encrypted voltage waveform signal based on the first waveform recorder; The voltage monitoring circuit is also used to monitor and obtain the correctly decrypted voltage waveform signal in the front oxygen sensor output information and the rear oxygen sensor output information, and the incorrectly decrypted voltage waveform signal in the front oxygen sensor output information and the rear oxygen sensor output information, and display the correctly decrypted voltage waveform signal and the incorrectly decrypted voltage waveform signal based on the second waveform recorder; The encryption circuit module of the encryption system and the decryption circuit module of the encryption system also respectively include a voltage waveform signal linear adjustment circuit, which is configured in the encryption circuit module of the encryption system and the decryption circuit module of the encryption system. The voltage waveform signal linear adjustment circuit is used to linearly adjust the voltage waveform signal in the front oxygen sensor output information and the rear oxygen sensor output information into a first voltage waveform signal whose waveform center point is zero and whose amplitude remains unchanged, and the first voltage waveform signal is used for encryption and decryption.

2. The automobile muffler pre-oxygen sensor information chaos encryption system circuit according to claim 1 is characterized in that: The JERK chaotic circuit 1 includes multiple resistors, multiple operational amplifiers and multiple capacitors; the multiple resistors are: resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, resistor R7, resistor R8, resistor R9, resistor R 10 , resistor R 11 , resistor R 12 , resistor R 13 and resistor R 14 , the plurality of operational amplifiers are: operational amplifier OP1, operational amplifier OP2, operational amplifier OP3, operational amplifier OP4, operational amplifier OP5, operational amplifier OP6, operational amplifier OP7 and operational amplifier OP8, and the plurality of capacitors are: capacitor C1, capacitor C2 and capacitor C3; JERK Chaos Circuit 1 forms a chaotic signal for encryption Channel, chaotic signal Channels and chaotic signals Channel; Chaotic signal Channel, chaotic signal Channels and chaotic signals The channel is used to combine the output signal with multiple resistors and multiple operational amplifiers to form a sign function circuit, and the sign function circuit is used to feed back the output to the chaotic signal Channel, chaotic signal Channels and chaotic signals The input end of the channel is used to generate a chaotic circuit for autonomous oscillation; The encryption circuit 1 includes a resistor R 15 , resistor R 16 , resistor R 17 , resistor R 18 , resistor R 23 , resistor R 24 , resistor R 25 and resistor R 26 , as well as operational amplifier OP9 and operational amplifier OP 11 , and the first waveform recorder; The encryption circuit 2 includes a resistor R 19 , resistor R 20 , resistor R 21 , resistor R 22 , resistor R 27 , resistor R 28 , resistor R 29 and resistor R 30 , and the operational amplifier OP 10 and operational amplifier OP 12 .

3. The automobile muffler pre-oxygen sensor information chaos encryption system circuit according to claim 2 is characterized in that: The automobile front oxygen sensor connection circuit includes the front oxygen sensor, the automobile electronic control unit A and the fuel rod relay A; The positive terminal 1 of the heater in the front oxygen sensor is connected to the terminal 3 of the fuel rod relay A, and the negative terminal 2 of the heater in the front oxygen sensor is grounded; The output signal terminal 3 of the front oxygen sensor is connected to the terminal 2 of the automobile electronic control unit A, and the negative terminal 4 of the front oxygen sensor signal line is connected to the ground terminal 1 of the automobile electronic control unit A; the terminal 4 of the fuel rod relay A is connected to the positive 12V of the automobile power supply, and the terminals 1 and 2 of the fuel rod relay A are connected in parallel to the power supply terminal of the automobile engine; The output signal of the front oxygen sensor 3 passes through the resistor R 17 Connect the operational amplifier OP9 non-inverting input terminal, the car power supply negative 12V through the resistor R 18 Connected to the non-inverting input terminal of operational amplifier OP9; The car power ground wire passes through the resistor R 15 Connected to the inverting input terminal of the operational amplifier OP9, the inverting input terminal of the operational amplifier OP9 is connected to the inverting input terminal of the operational amplifier OP9 through the resistor R 16 Connect the output of the operational amplifier OP9, the output of the operational amplifier OP9 is connected through the resistor R 25 Connecting the operational amplifier OP 11 In-phase input, chaotic signal The output of the operational amplifier OP2 of the channel is connected to the operational amplifier OP through the resistor R26. 11 The common-mode input terminal, the car power ground wire passes through the resistor R 24 Connect to the operational amplifier OP 11 Inverting input terminal, operational amplifier OP 11 The inverting input is connected through the resistor R 23 Connect to the operational amplifier OP 11 Output terminal, operational amplifier OP 11 The output end is connected to the third end of the self-locking button K1, the first end of the self-locking button K1 is connected to the output signal terminal 3 of the front oxygen sensor, the second end of the self-locking button K1 is connected to the fourth end of the self-locking button K1, and the second end of the self-locking button K1 is connected to the signal channel 1 of the first waveform recorder to store the recorded waveform.

4. The automobile muffler pre-oxygen sensor information chaos encryption system circuit according to claim 2 is characterized in that: The automobile rear oxygen sensor connection circuit includes the rear oxygen sensor, the automobile electronic control unit B and the fuel rod relay B; The positive terminal 1 of the heater in the rear oxygen sensor is connected to the terminal 3 of the fuel rod relay B, the negative terminal 2 of the heater in the rear oxygen sensor is grounded, the output signal terminal 3 of the rear oxygen sensor is connected to the terminal 2 of the automobile electronic control unit B, and the negative terminal 4 of the rear oxygen sensor signal line is connected to the ground terminal 1 of the automobile electronic control unit B; the terminal 4 of the fuel rod relay B is connected to the positive 12V of the automobile power supply, and the terminals 1 and 2 of the fuel rod relay B are connected in parallel to the power supply terminal of the automobile engine; The output signal of the rear oxygen sensor 3 passes through the resistor R 21 Connecting the operational amplifier OP 10 The same-phase input terminal, the car power supply negative 12V passes through the resistor R 22 Connect to the operational amplifier OP 10 The non-inverting input terminal of the vehicle power supply is connected to the ground wire through the resistor R 19 Connect to the operational amplifier OP 10 Inverting input terminal, operational amplifier OP 10 The inverting input is connected through the resistor R 20 Connecting the operational amplifier OP 10 Output terminal, operational amplifier OP 10 The output terminal passes through the resistor R 29 Connecting the operational amplifier OP 12 In-phase input, chaotic signal The output of the operational amplifier OP6 of the channel is connected to the operational amplifier OP 12 The common-mode input terminal, the car power ground wire passes through the resistor R 27 Connect to the operational amplifier OP 12 Inverting input terminal, operational amplifier OP 12 The inverting input is connected through the resistor R 28 Connect to the operational amplifier OP 12 Output terminal, operational amplifier OP 12 The output end is connected to the third end of the self-locking button K2, the first end of the self-locking button K2 is connected to the output signal terminal 3 of the rear oxygen sensor, the second end of the self-locking button K2 is connected to the fourth end of the self-locking button K2, and the fourth end of the self-locking button K2 is connected to the signal channel 2 of the first waveform recorder to store the recorded waveform; When the self-locking buttons K1 and K2 are not pressed, the signal channel 1 of the first waveform recorder stores the unencrypted output information of the front oxygen sensor, and the signal channel 2 stores the unencrypted output information of the rear oxygen sensor; When the self-locking button K2 is pressed and the self-locking button K1 is not pressed, the first waveform recorder signal channel 1 stores the unencrypted chaotic encrypted information output by the front oxygen sensor, and the first waveform recorder signal channel 2 stores the chaotic encrypted information output by the rear oxygen sensor; When both the self-locking button K1 and the self-locking button K2 are pressed, if the correct encryption key is not obtained, the information of the car muffler pre-oxygen sensor cannot be obtained, so that the car engine status can be protected, thereby ensuring that the privacy of the driver's braking car driving status is not stolen.

5. The automobile muffler pre-oxygen sensor information chaos encryption system circuit according to claim 2 is characterized in that: The output of the operational amplifier OP3 is connected to the inverting input of the operational amplifier OP2 through a resistor R3, and the inverting input of the operational amplifier OP2 is connected to the output of the operational amplifier OP2 through a capacitor C1. 11 The output end is connected to the inverting input end of the operational amplifier OP1 through a resistor R1, the inverting input end of the operational amplifier OP1 is grounded, and the inverting input end of the operational amplifier OP1 is connected to the output end of the operational amplifier OP1 through a resistor R2, forming a chaotic signal of the output information of the front oxygen sensor. aisle; The output of the operational amplifier OP5 is connected to the inverting input of the operational amplifier OP3 through a resistor R4, the inverting input of the operational amplifier OP3 is grounded, and the inverting input of the operational amplifier OP3 is connected to the output of the operational amplifier OP3 through a capacitor C2 to form a chaotic signal. aisle; Operational amplifier OP for chaotic encryption of front oxygen sensor information 11 The output terminal is connected to the inverting input terminal of the operational amplifier OP7, the non-inverting input terminal of the operational amplifier OP7 is grounded, and the output terminal of the operational amplifier OP7 is connected to the inverting input terminal of the operational amplifier OP7 through the resistor R 13 Connected to the inverting input terminal of the operational amplifier OP8, the inverting input terminal of the operational amplifier OP8 is connected to the inverting input terminal of the operational amplifier OP8 through the resistor R 14 connected to the output terminal of the operational amplifier OP8, the non-inverting input terminal of the operational amplifier OP8 is grounded, the output terminal of the operational amplifier OP3 is connected to the inverting input terminal of the operational amplifier OP4 through the adjustable resistor R5, the output terminal of the operational amplifier OP1 is connected to the inverting input terminal of the operational amplifier OP4 through the adjustable resistor R6, and the output terminal of the operational amplifier OP8 is connected to the inverting input terminal of the operational amplifier OP4 through the adjustable resistor R7; Operational amplifier OP for chaotic encryption of rear oxygen sensor information 12 The output end is connected to the inverting input end of the operational amplifier OP4 through an adjustable resistor R8, and the inverting input end of the operational amplifier OP4 is connected to the output end of the operational amplifier OP4 through an adjustable resistor R9. 10 The inverting input terminal of the operational amplifier OP5 is connected to the inverting input terminal of the operational amplifier OP5, the non-inverting input terminal of the operational amplifier OP5 is grounded, the inverting input terminal of the operational amplifier OP5 is connected to the output terminal of the operational amplifier OP5 through the capacitor C3, and the output terminal of the operational amplifier OP5 is connected to the output terminal of the operational amplifier OP5 through the resistor R 11 Connected to the inverting input terminal of the operational amplifier OP6, the non-inverting input terminal of the operational amplifier OP6 is grounded, and the inverting input terminal of the operational amplifier OP6 is connected to the inverting input terminal of the operational amplifier OP6 through the resistor R 12 Connected to the output of operational amplifier OP6 to form the chaotic signal of the rear oxygen sensor output information aisle; Operational Amplifier OP 11 The output end of the operational amplifier OP 12 Connect the output wire to jack J2.

6. The automobile muffler pre-oxygen sensor information chaos encryption system circuit according to claim 1 is characterized in that: JERK chaotic circuit 2 includes resistor R 41 , resistor R 42 , resistor R 43 , resistor R 44 , resistor R 45 , resistor R 46 , resistor R 47 , resistor R 48 , resistor R 49 , resistor R 50 , resistor R 51 , resistor R 52 Resistor R 53 and resistor R 54 ; and operational amplifier OP 21 , Operational Amplifier OP 22 , Operational Amplifier OP 23 , Operational Amplifier OP 24 , Operational Amplifier OP 25 , Operational Amplifier OP 26 , Operational Amplifier OP 27 , Operational Amplifier OP 28 ; and capacitor C4, capacitor C5 and capacitor C6; Decryption circuit 1 and decryption circuit 2 include resistor R 55 , resistor R 56 , resistor R 57 , resistor R 58 , resistor R 59 , resistor R 60 , resistor R 61 , resistor R 62 , resistor R 63 and resistor R 64 , and the operational amplifier OP 29 , Operational Amplifier OP 30 and operational amplifier OP 31 , and a second waveform recorder; JERK Chaos Circuit 2 forms a decryption Channel chaos signal, used for decryption Channel chaotic signals and their use for decryption Channel chaotic signal.

7. The automobile muffler pre-oxygen sensor information chaos encryption system circuit according to claim 6 is characterized in that: Operational Amplifier OP 23 The output terminal passes through the resistor R 41 Connect to the operational amplifier OP 21 Inverting input terminal, operational amplifier OP 21 The non-inverting input terminal is grounded, and the operational amplifier OP 21 The inverting input terminal is connected to the operational amplifier OP through capacitor C4. 21 Output terminal, operational amplifier OP 21 The output terminal passes through the resistor R 42 Connect to the operational amplifier OP 22 Inverting input terminal, operational amplifier OP 22 The non-inverting input terminal is grounded, and the operational amplifier OP 22 The inverting input is connected through the resistor R 43 Connecting the operational amplifier OP 22 Output end, forming the front oxygen sensor output information decryption chaotic circuit Channel chaotic signal; Operational Amplifier OP 25 The output terminal passes through the resistor R 44 Connect to the operational amplifier OP 23 Inverting input terminal, operational amplifier OP 23 The non-inverting input terminal is grounded, and the operational amplifier OP 23 The inverting input terminal is connected to the operational amplifier OP through capacitor C5. 23 Output end, forming the chaotic circuit for decrypting the information of front and rear oxygen sensors Channel chaotic signal; Operational Amplifier OP 23 The output terminal is connected through an adjustable resistor R 45 Connect to the operational amplifier OP 24 Inverting input terminal, operational amplifier OP 29 The output terminal is connected through an adjustable resistor R 46 Connect to the operational amplifier OP 24 Inverting input terminal, operational amplifier OP 28 The output terminal is connected through an adjustable resistor R 47 Connect to the operational amplifier OP 24 Inverting input terminal, wire jack J4 passes through adjustable resistor R 48 Connect to the operational amplifier OP 24 Inverting input terminal, operational amplifier OP 24 The non-inverting input terminal is grounded, and the operational amplifier OP 24 The inverting input is connected through an adjustable resistor R 49 Connect to the operational amplifier OP 24 Output terminal, operational amplifier OP 24 The output terminal passes through the resistor R 50 Connect to the operational amplifier OP 25 Inverting input terminal, operational amplifier OP 25 The non-inverting input terminal is grounded, and the operational amplifier OP 25 The inverting input terminal is connected to the operational amplifier OP through capacitor C6. 25 Output terminal, operational amplifier OP 25 The output terminal passes through the resistor R 51 Connect to the operational amplifier OP 26 Inverting input terminal, operational amplifier OP 26 The non-inverting input terminal is grounded, and the operational amplifier OP 26 The inverting input is connected through the resistor R 52 Connecting the operational amplifier OP 26 Output end, forming the front oxygen sensor output information decryption chaotic circuit Channel chaotic signal.

8. The automobile muffler pre-oxygen sensor information chaos encryption system circuit according to claim 6 is characterized in that: The wire jack J3 passes through the resistor R 55 Connect to the operational amplifier OP 29 Inverting input terminal, operational amplifier OP 29 The non-inverting input terminal is grounded, and the operational amplifier OP 29 The inverting input is connected through the resistor R 56 Connecting the operational amplifier OP 29 Output terminal, wire jack J3 connects to operational amplifier OP 27 Inverting input terminal, operational amplifier OP 27 The non-inverting input terminal is grounded, and the operational amplifier OP 27 The output terminal passes through the resistor R 53 Connect to the operational amplifier OP 28 Inverting input terminal, operational amplifier OP 28 The non-inverting input terminal is grounded, and the operational amplifier OP 28 The inverting input is connected through the resistor R 54 Connecting the operational amplifier OP 28 Output terminal, operational amplifier OP 22 The output terminal passes through the resistor R 57 Connect to the operational amplifier OP 30 Inverting input terminal, operational amplifier OP 30 The inverting input is connected through the resistor R 60 Connecting the operational amplifier OP 30 Output terminal, operational amplifier OP 29 The output terminal passes through the resistor R 58 Connect to the operational amplifier OP 30 Non-inverting input terminal, operational amplifier OP 30 The non-inverting input is connected through the resistor R 59 Ground, operational amplifier OP 30 The output terminal outputs the decrypted front oxygen sensor information and connects to the signal channel 1 of the second waveform recorder; The wire jack J4 passes through the resistor R 61 Connect to the operational amplifier OP 31 Inverting input terminal, operational amplifier OP 31 The inverting input is connected through the resistor R 62 Connecting the operational amplifier OP 31 Output terminal, operational amplifier OP 26 The output terminal passes through the resistor R 63 Connect to the operational amplifier OP 31 Non-inverting input terminal, operational amplifier OP 31 The non-inverting input is connected through the resistor R 64 Ground, operational amplifier OP 31 The output end outputs the decrypted rear oxygen sensor information and connects to the signal channel 2 of the second waveform recorder.

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