CN216388156U - Environment-friendly data acquisition box for automobile - Google Patents

Abstract

The utility model discloses an automobile environment-friendly data acquisition box, which comprises a first CAN communication circuit, a singlechip controller, an encryption circuit and a remote wireless communication module, wherein the circuit acquires automobile exhaust environment-friendly data through the first CAN communication circuit; the single chip microcomputer controller acquires the environment-friendly data of the automobile exhaust through the first CAN communication circuit; the encryption circuit carries out hardware encryption on the automobile exhaust environment-friendly data; and the remote wireless communication module sends the encrypted automobile exhaust environment-friendly data to a remote server. So, gather automobile exhaust environmental protection data back through first CAN communication circuit, CAN transmit to the hardware encryption that the encryption circuit carried out data is sending to remote server through single chip microcomputer controller and long-range wireless communication module. Therefore, the encryption speed is relatively high, the task amount of the single chip microcomputer controller can be reduced while the encryption of uploaded data can be guaranteed, and the single chip microcomputer controller can run smoothly.

Description

Environment-friendly data acquisition box for automobile

Technical Field

The utility model relates to the technical field of automotive electronics, in particular to an automotive environment-friendly data acquisition box.

Background

The main function of the automobile diagnosis product is to read information such as vehicle fault codes or automobile exhaust emission through an On Board Diagnostics (OBD) interface. When the automobile diagnosis product is used, the automobile diagnosis product is inserted into an automobile through the OBD connector, and after a user is connected with the automobile diagnosis box through the Bluetooth by using an application program, the user can enter diagnosis software to read fault information and data streams in corresponding modules, and sends acquired information to a remote server in a wireless mode.

In the prior art, after the automobile diagnosis product collects the relevant information of the automobile, the information is generally directly uploaded to a remote server, so that the automobile privacy information of a user can be possibly leaked; in another method, information collected by the automobile is encrypted by software encryption and then sent to the remote server, but such a method may cause the automobile diagnostic product processor to be in a long-term over-frequency operating state, and when the data volume is large, the automobile diagnostic product processor is usually blocked.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the utility model aims to provide an environment-friendly data acquisition box for an automobile.

In order to achieve the above object, an embodiment of the present invention provides an automobile environmental protection data acquisition box, including:

the first CAN communication circuit is connected with the automobile exhaust collection sensor and is used for collecting the environment-friendly data of the automobile exhaust;

the single chip microcomputer controller is connected with the first CAN communication circuit and used for acquiring the environment-friendly data of the automobile exhaust through the first CAN communication circuit;

the encryption circuit is connected with the single chip microcomputer controller and is used for carrying out hardware encryption on the automobile exhaust environment-friendly data;

and the remote wireless communication module is connected with the single chip microcomputer controller and used for sending the encrypted automobile exhaust environment-friendly data to a remote server.

Further, according to an embodiment of the present invention, the encryption circuit includes a hardware encryption chip, and the hardware encryption chip is in communication connection with the single chip microcomputer controller through a serial communication interface to perform transceiving processing on the vehicle exhaust environment-friendly data.

Further, according to an embodiment of the present invention, the vehicle environmental protection data collecting box further includes: and the second CAN communication circuit is respectively connected with the single chip microcomputer controller and the automobile OBD interface, so that the data of the automobile CAN be acquired through the automobile OBD interface, and the acquired automobile data CAN be transmitted to the remote server after being encrypted by the encryption circuit.

Further, according to an embodiment of the present invention, the vehicle environmental protection data collecting box further includes: and the GPS positioning module is connected with the single chip microcomputer controller to acquire the position data of the automobile and encrypt the acquired automobile position data by the encryption circuit and then send the encrypted automobile position data to the remote server.

Further, according to an embodiment of the present invention, the vehicle environmental protection data collecting box further includes: and the acceleration sensor is connected with the single chip microcomputer controller to acquire acceleration data of the automobile and encrypt the acquired acceleration data of the automobile through the encryption circuit and then send the encrypted data to the remote server.

Further, according to an embodiment of the present invention, the vehicle environmental protection data collecting box further includes: and the second CAN communication circuit is connected with an automobile OBD interface through the channel selection circuit, and the channel selection circuit is also connected with the single chip microcomputer controller so as to select and switch CAN communication interfaces under the control of the single chip microcomputer controller.

Further, according to an embodiment of the present invention, the vehicle environmental protection data collecting box further includes: ignition detection circuitry, ignition detection circuitry respectively with car OBD interface reaches single chip microcomputer controller connects, is used for single chip microcomputer controller passes through ignition detection circuitry detects car ignition and starts the back, through long-range wireless communication module to remote server sends automobile exhaust environmental protection data.

Further, according to an embodiment of the present invention, the ignition detection circuit includes:

a first triode (Q32), the base of first triode (Q32) pass through first resistance (R116) with ignition signal line interface connection on the car OBD interface, the projecting pole and the reference ground of first triode (Q32) are connected, the collecting electrode of first triode (Q32) passes through second resistance (R110) and is connected with first voltage source, the collecting electrode of first triode (Q32) still with microcontroller's voltage sampling end is connected.

Further, according to an embodiment of the present invention, the ignition detection circuit further includes:

a second triode (Q30), the base of the second triode (Q30) pass through the third resistor (R113) with the collecting electrode of the first triode (Q32) is connected, the projecting pole of the second triode (Q30) is connected with reference ground, the collecting electrode of the second triode (Q30) passes through the fourth resistor (R111) and is connected with the second voltage source, the collecting electrode of the second triode (Q30) still with the voltage sampling end of singlechip controller is connected.

Further, according to an embodiment of the present invention, the vehicle environmental protection data collecting box further includes: the power supply control circuit of the encryption module comprises:

the source electrode of the MOS tube (Q34) is connected with a first power supply, and the source electrode of the MOS tube (Q34) is connected with the power supply end of the encryption circuit;

a third triode (Q35), the base of the third triode (Q35) is connected with a control end of the single chip microcomputer controller, the emitter of the third triode (Q35) is connected with the reference ground, the collector of the third triode (Q35) is connected with the gate of the MOS transistor (Q34) through a fifth resistor (R131), and the gate of the MOS transistor (Q34) is also connected with the source of the MOS transistor (Q34) through a sixth resistor (R130).

The automobile environment-friendly data acquisition box provided by the embodiment of the utility model is used for being connected with an automobile exhaust acquisition sensor through a first CAN communication circuit so as to acquire automobile exhaust environment-friendly data; the single chip microcomputer controller and the first CAN communication circuit are used for acquiring the environment-friendly data of the automobile exhaust through the first CAN communication circuit; the encryption circuit is connected with the single chip microcomputer controller and used for carrying out hardware encryption on the automobile exhaust environment-friendly data; and the remote wireless communication module is connected with the single chip microcomputer controller so as to send the encrypted automobile exhaust environment-friendly data to a remote server. So, gather automobile exhaust environmental protection data through first CAN communication circuit after, CAN transmit to the hardware encryption back that the encryption circuit carries out data, the rethread singlechip controller and long-range wireless communication module send to remote server. Therefore, the encryption speed is relatively high, the processor task amount of the single chip microcomputer controller is not occupied, the uploaded data encryption can be guaranteed, and meanwhile, the task amount of the single chip microcomputer controller is reduced, so that the single chip microcomputer controller can run smoothly.

Drawings

FIG. 1 is a block diagram of a schematic structure of an environmental protection data acquisition box for an automobile according to an embodiment of the present invention;

fig. 2 is a circuit configuration diagram of an encryption circuit according to an embodiment of the present invention;

fig. 3 is a circuit diagram of a power supply control circuit of an encryption module according to an embodiment of the present invention;

fig. 4 is a circuit structure diagram of a first CAN communication circuit according to an embodiment of the present invention;

fig. 5 is a circuit configuration diagram of a second CAN communication circuit provided in the embodiment of the present invention;

fig. 6 is a circuit configuration diagram of an ignition detection circuit according to an embodiment of the present invention.

Fig. 7 is a circuit structure diagram of a BODII interface circuit according to an embodiment of the present invention.

Reference numerals:

a BODII interface 101;

a channel selection circuit 102;

a second CAN communication circuit 103;

a first CAN communication circuit 104;

an automobile exhaust gas collection sensor 105;

a single chip controller 106;

an ignition detection circuit 107;

an encryption circuit 108;

an L-line circuit 109;

a K-line circuit 1010;

a GPS positioning module 1011;

a long-range wireless communication module 1012;

an ESIM card 1013;

a SIM card 1014;

an acceleration sensor 1015;

an external memory 1016;

an SD external memory 1017;

a high-frequency crystal oscillator 1018;

and a low-frequency crystal oscillator 1019.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the utility model. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1, the present invention provides an environmental protection data collecting box for an automobile, including: the system comprises a first CAN communication circuit 104, a singlechip controller 106, an encryption circuit 108 and a remote wireless communication module 1012, wherein the first CAN communication circuit 104 is used for being connected with an automobile exhaust collection sensor 105 so as to collect automobile exhaust environment-friendly data; an automobile exhaust gas sensor 105, for example a PM2.5 sensor, CAN be connected via the first CAN communication circuit 104. Whether the tail gas emitted by the automobile meets the standard requirement is collected.

The single chip microcomputer controller 106 is connected with the first CAN communication circuit 104 and is used for acquiring automobile exhaust environment-friendly data through the first CAN communication circuit 104; after the automobile exhaust collection sensor 105 collects automobile exhaust environment-friendly data, the collected automobile exhaust environment-friendly data is in communication connection with the single chip microcomputer controller 106 through the CAN communication circuit so that the collected data CAN be sent to the single chip microcomputer controller 106 in a CAN protocol communication mode.

The encryption circuit 108 is connected with the single chip microcomputer controller 106 and used for carrying out hardware encryption on the automobile exhaust environment-friendly data; the single chip microcomputer controller 106 needs to encrypt the automobile exhaust environment-friendly data after receiving the automobile exhaust environment-friendly data sent by the automobile exhaust collection sensor 105, and the encryption circuit 108 can encrypt the automobile exhaust environment-friendly data in a hardware mode, so that the encryption speed is relatively high, the operation task amount of the single chip microcomputer controller 106 is not occupied, and the phenomenon that the single chip microcomputer controller 106 is stuck due to the fact that a large amount of automobile exhaust environment-friendly data are encrypted is avoided.

The remote wireless communication module 1012 is connected to the single chip microcomputer controller 106 to transmit the encrypted vehicle exhaust environment-friendly data to a remote server. After the encryption of the environment-friendly data of the automobile exhaust is completed, the single chip microcomputer controller 106 sends the encrypted environment-friendly data of the automobile exhaust to a remote server by controlling the remote wireless communication module 1012 so as to store and record the data.

The automobile environment-friendly data acquisition box provided by the embodiment of the utility model is used for being connected with an automobile exhaust acquisition sensor 105 through a first CAN communication circuit 104 so as to acquire automobile exhaust environment-friendly data; the single chip microcomputer controller 106 and the first CAN communication circuit 104 are used for acquiring the environmental protection data of the automobile exhaust through the first CAN communication circuit 104; the encryption circuit 108 is connected with the single chip microcomputer controller 106 and used for carrying out hardware encryption on the automobile exhaust environment-friendly data; the remote wireless communication module 1012 is connected to the single chip microcomputer controller 106 to transmit the encrypted vehicle exhaust environment-friendly data to a remote server. Thus, after the environment-friendly data of the automobile exhaust is collected through the first CAN communication circuit 104, the environment-friendly data CAN be transmitted to the encryption circuit 108 for hardware encryption of the data, and then the environment-friendly data CAN be transmitted to a remote server through the single chip microcomputer controller 106 and the remote wireless communication module 1012. Therefore, the encryption speed is relatively high, the processor task amount of the single chip microcomputer controller 106 is not occupied, the uploaded data encryption can be guaranteed, the task amount of the single chip microcomputer controller 106 is reduced, and the single chip microcomputer controller 106 can run smoothly.

In one embodiment of the utility model, the automobile OBD interface can be any one of an OBD-II interface 1011, an OBD-III interface 1011 or an OBD-I interface.

Referring to fig. 2, the encryption circuit 108 includes a hardware encryption chip U18, and the hardware encryption chip U18 is communicatively connected to the mcu 106 through a serial communication interface, so as to receive and transmit the environmental protection data of the vehicle exhaust. As shown in fig. 2, after the environment-friendly data of the automobile exhaust is encrypted by the hardware encryption chip U18, the encrypted data is transmitted back to the single chip microcomputer controller 106, and the circuit structure is relatively simple and easy.

Referring to fig. 1 and 5, the environmental protection data collecting box for a vehicle further includes: second CAN communication circuit 103, second CAN communication circuit 103 respectively with single chip microcomputer controller 106 and car OBD interface connection, with pass through the data of car OBD interface acquisition car to pass through gather the car data send to after encryption circuit 108 encrypts remote server. That is, while the first CAN communication circuit 104 collects the environmental protection data of the vehicle, the second CAN communication circuit 103 CAN also collect the relevant information of the vehicle. Therefore, the collected environmental protection data of the automobile can be associated with other parameters of the automobile, so that the data collection is more reasonable.

Referring to fig. 1, the environmental protection data collecting box for a vehicle further includes: and the GPS positioning module 1011 is connected with the single-chip microcomputer controller 106 to acquire the position data of the automobile, and the acquired automobile position data is encrypted by the encryption circuit 108 and then sent to the remote server. The GPS positioning module 1011 can acquire the position information of the automobile, encrypt the position information and send the position information to the remote server, acquire the running state of the automobile according to the position information of the automobile, and associate the running state of the automobile with the environment-friendly data of the automobile, so that the data acquisition is more reasonable.

Referring to fig. 1, the environmental protection data collecting box for a vehicle includes: and the acceleration sensor 1015, wherein the acceleration sensor 1015 is connected with the singlechip controller 106 to acquire the acceleration data of the automobile, and the acquired automobile acceleration data is encrypted by the encryption circuit 108 and then sent to the remote server. Through acceleration sensor 1015 can acquire the acceleration information of car to send to remote server after encrypting, through the acceleration information of car, can acquire the acceleration state of car, through carrying out the correlation with the environmental protection data of the acceleration state of car and car, make the collection of data reasonable more.

Referring to fig. 1, the environmental protection data collecting box for a vehicle further includes: the second CAN communication circuit 103 is connected with an automobile OBD interface through the channel selection circuit 102, and the channel selection circuit 102 is further connected with the single chip microcomputer controller 106 so as to perform CAN communication interface selection switching under the control of the single chip microcomputer controller 106. By arranging the channel selection circuit 102 between the automobile OBD interface and the second CAN communication circuit 103, the signal terminal on the automobile OBD interface CAN be switched and selected. Since the signal sequence on the OBD interfaces of different automobiles may be different, the switching of the ports may be realized by the channel selection circuit 102, and the channel selection circuit 102 includes a plurality of channel controllers (e.g., relays) to perform the channel selection output under the control of the mcu 106.

Referring to fig. 1, the environmental protection data collecting box for a vehicle further includes: ignition detection circuitry 107, ignition detection circuitry 107 respectively with car OBD interface and single chip microcomputer controller 106 are connected for pass through at the singlechip the ignition detection circuitry 107 detects car ignition and starts the back, through long-range wireless communication module 1012 sends automobile exhaust environmental protection data to remote server. Through the starting state of car can be acquireed to ignition detection circuitry 107 to begin to gather car environmental protection data again after the car starts, can avoid like this when the car does not start, gather useless data, when also reducing the car and not starting, probably consume the car storage battery to the greatest extent after car environmental protection data acquisition box system moves comprehensively, the unable phenomenon of striking sparks of car appears.

Referring to fig. 6, the ignition detection circuit 107 includes: a first triode Q32, the base of the first triode Q32 is connected with the ignition signal line interface V _ ACC (14) on the automobile OBD interface through a first resistor R116, the emitter of the first triode Q32 is connected with the reference ground, the collector of the first triode Q32 is connected with the first voltage source through a second resistor R110, and the collector of the first triode Q32 is further connected with the voltage sampling end V _ ACC of the mcu 106. The level signal of an ignition signal line V _ ACC on an OBD interface of the automobile can be output after voltage conversion through the first triode Q32. For example, when the ignition signal line V _ ACC on the OBD interface of the vehicle is at a high level signal, the first transistor Q32 is turned on, the collector of the first transistor Q32 has a high level and is converted into a low level signal, and the mcu 106 detects that the level signal changes, and then obtains that the vehicle has been ignited.

Referring to fig. 5, the ignition detection circuit 107 further includes: a second transistor Q30, wherein the collector of the first transistor Q32 is connected with the voltage sampling end of the singlechip controller 106 through the second transistor Q30; the collector of the first triode Q32 is connected to the base of the second triode Q30 through a third resistor R113, the emitter of the second triode Q30 is connected to the reference ground, the collector of the second triode Q30 is connected to the second voltage source through a fourth resistor R111, and the collector of the second triode Q30 is further connected to the voltage sampling terminal of the mcu 106. The second transistor Q30 is disposed between the first transistor Q32 and the one-chip microcomputer controller 106, so that the level signal output by the first transistor Q32 can be inverted and output. So that the detection signal received by the mcu 106 is in phase with the ignition signal line V _ ACC on the OBD interface of the vehicle. For example, when the ignition signal line V _ ACC on the OBD interface of the vehicle is at a high level, the collector of the first transistor Q32 outputs a low level, the second transistor Q30 is turned off, and the collector of the second transistor Q30 outputs a high level to the mcu 106. On the contrary, when no voltage is output from the ignition signal line V _ ACC terminal of the OBD interface of the vehicle, the second transistor Q30 is turned on, and a low level is output to the mcu 106.

Referring to fig. 3, the environmental protection data collecting box for a vehicle further includes: the power supply control circuit of the encryption module comprises: a MOS tube Q34 and a third triode Q35, wherein the source of the MOS tube Q34 is connected with the first power supply, and the source of the MOS tube Q34 is connected with the power supply end of the encryption circuit 108; as shown in fig. 3, the power supply terminal VDD _3V3 and the power supply terminal of the cryptographic chip are connected through the MOS transistor Q34, so that the power supply of the cryptographic chip can be controlled on and off, for example, when the cryptographic chip needs to be encrypted, the power supply can be switched on through the MOS transistor Q34 to supply power to the cryptographic chip. Otherwise, the power supply may be turned off.

The base electrode of the third triode Q35 is connected with a control end of the single chip microcomputer controller, the emitter electrode of the third triode Q35 is connected with the reference ground, the collector electrode of the third triode Q35 is connected with the gate electrode of the MOS transistor Q34 through a fifth resistor R131, and the gate electrode of the MOS transistor Q34 is further connected with the source electrode of the MOS transistor Q34 through a sixth resistor R130. The MOS transistor Q34 can be rapidly switched on or off by the third transistor Q35. For example, when the single-chip controller 106 outputs a high signal, the third transistor Q35 may be made conductive. At this time, the emitter and the collector of the third transistor Q35 have large current, and in the low state, the MOS transistor Q34 can be turned on quickly. In contrast, when the single-chip microcomputer controller 106 outputs a low level signal, the MOS transistor Q34 can be turned off quickly. This controls the power supply to the cryptographic chip. So as to save the power consumption of the automobile battery when the encryption chip is not used.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing detailed description, or equivalent changes may be made in some of the features of the embodiments. All equivalent structures made by using the contents of the specification and the attached drawings of the utility model can be directly or indirectly applied to other related technical fields, and are also within the protection scope of the patent of the utility model.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.

Claims (10)

1. An automobile environment-friendly data acquisition box, which is characterized by comprising:

the first CAN communication circuit is connected with the automobile exhaust collection sensor and is used for collecting the environment-friendly data of the automobile exhaust;

the single chip microcomputer controller is connected with the first CAN communication circuit and used for acquiring the environment-friendly data of the automobile exhaust through the first CAN communication circuit;

the encryption circuit is connected with the single chip microcomputer controller and is used for carrying out hardware encryption on the automobile exhaust environment-friendly data;

and the remote wireless communication module is connected with the single chip microcomputer controller and used for sending the encrypted automobile exhaust environment-friendly data to a remote server.

2. The vehicle environment-friendly data acquisition box according to claim 1, wherein the encryption circuit comprises a hardware encryption chip, and the hardware encryption chip is in communication connection with the single chip microcomputer controller through a serial communication interface so as to transmit and receive the vehicle exhaust environment-friendly data.

3. The vehicle environmental protection data collection box according to claim 1, further comprising: and the second CAN communication circuit is respectively connected with the single chip microcomputer controller and the automobile OBD interface, so that the data of the automobile CAN be acquired through the automobile OBD interface, and the acquired automobile data CAN be transmitted to the remote server after being encrypted by the encryption circuit.

4. The vehicle environmental protection data collection box according to claim 1, further comprising: and the GPS positioning module is connected with the single chip microcomputer controller to acquire the position data of the automobile and encrypt the acquired automobile position data by the encryption circuit and then send the encrypted automobile position data to the remote server.

5. The vehicle environmental protection data collection box according to claim 1, further comprising: and the acceleration sensor is connected with the single chip microcomputer controller to acquire acceleration data of the automobile and encrypt the acquired acceleration data of the automobile through the encryption circuit and then send the encrypted data to the remote server.

6. The vehicle environmental protection data collection box according to claim 3, further comprising: and the second CAN communication circuit is connected with an automobile OBD interface through the channel selection circuit, and the channel selection circuit is also connected with the single chip microcomputer controller so as to select and switch CAN communication interfaces under the control of the single chip microcomputer controller.

7. The vehicle environmental protection data collection box according to claim 3, further comprising: ignition detection circuitry, ignition detection circuitry respectively with car OBD interface reaches single chip microcomputer controller connects, is used for single chip microcomputer controller passes through ignition detection circuitry detects car ignition and starts the back, through long-range wireless communication module to remote server sends automobile exhaust environmental protection data.

8. The vehicle environmental protection data collection box according to claim 7, wherein the ignition detection circuit comprises:

a first triode (Q32), the base of first triode (Q32) pass through first resistance (R116) with ignition signal line interface connection on the car OBD interface, the projecting pole and the reference ground of first triode (Q32) are connected, the collecting electrode of first triode (Q32) passes through second resistance (R110) and is connected with first voltage source, the collecting electrode of first triode (Q32) still with microcontroller's voltage sampling end is connected.

9. The vehicle environmental protection data collection box according to claim 8, wherein said ignition detection circuit further comprises:

a second triode (Q30), the base of the second triode (Q30) pass through the third resistor (R113) with the collecting electrode of the first triode (Q32) is connected, the projecting pole of the second triode (Q30) is connected with reference ground, the collecting electrode of the second triode (Q30) passes through the fourth resistor (R111) and is connected with the second voltage source, the collecting electrode of the second triode (Q30) still with the voltage sampling end of singlechip controller is connected.

10. The vehicle environmental protection data collection box according to claim 1, further comprising: the power supply control circuit of the encryption module comprises:

the source electrode of the MOS tube (Q34) is connected with a first power supply, and the source electrode of the MOS tube (Q34) is connected with the power supply end of the encryption circuit;

a third triode (Q35), the base of the third triode (Q35) is connected with a control end of the single chip microcomputer controller, the emitter of the third triode (Q35) is connected with the reference ground, the collector of the third triode (Q35) is connected with the gate of the MOS transistor (Q34) through a fifth resistor (R131), and the gate of the MOS transistor (Q34) is also connected with the source of the MOS transistor (Q34) through a sixth resistor (R130).

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