CN110576828A - Method for emergency unlocking of GNSS terminal of engineering mechanical equipment - Google Patents
Method for emergency unlocking of GNSS terminal of engineering mechanical equipment Download PDFInfo
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- CN110576828A CN110576828A CN201910758723.0A CN201910758723A CN110576828A CN 110576828 A CN110576828 A CN 110576828A CN 201910758723 A CN201910758723 A CN 201910758723A CN 110576828 A CN110576828 A CN 110576828A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
- B60R25/2009—Antitheft state indicator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
- B60R25/23—Means to switch the anti-theft system on or off using manual input of alphanumerical codes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lock And Its Accessories (AREA)
Abstract
The invention relates to the technical field of GNSS terminals, in particular to an emergency unlocking method for a GNSS terminal of engineering mechanical equipment, which comprises the following steps: firstly, entering an emergency unlocking state by the GNSS terminal; entering a password number input state; thirdly, judging whether the 4-digit password number is input; judging whether the password number is input correctly, if the password number is input correctly, outputting the GNSS terminal CAN bus to be in an unlocking state, quitting the emergency unlocking state by the GNSS terminal, and recovering the prior state by the nixie tube; if the password number is input incorrectly, the GNSS terminal does not unlock, the GNSS terminal exits the emergency unlocking state, and the nixie tube restores the previous state. The invention can better solve the problem of GPRS remote unlocking failure.
Description
Technical Field
the invention relates to the technical field of GNSS terminals, in particular to an emergency unlocking method for a GNSS terminal of engineering mechanical equipment.
Background
At present, a plurality of large-scale engineering mechanical equipment (such as an excavator, a bulldozer and the like) are in a renting mode. In order to control the risk, a GNSS remote control terminal needs to be additionally installed on the engineering mechanical equipment, so that the operation of remotely locking and unlocking the engineering mechanical equipment can be performed.
The remote vehicle locking and unlocking are based on a GPRS wireless communication network, and for some reasons, the wireless communication network cannot cover all regions, for example, in some remote mountainous areas, network signals may be weak or even blind areas, and if the engineering mechanical equipment enters the region, the remote vehicle locking and unlocking operation of the engineering mechanical equipment through the GPRS wireless communication network cannot be carried out. Especially, when the device is just locked, the device needs to be unlocked and cannot be remotely unlocked, which is very troublesome.
Disclosure of Invention
the invention provides a method for emergency unlocking of a GNSS terminal of engineering machinery equipment, which can overcome some or some defects in the prior art.
The invention discloses an emergency unlocking method for a GNSS (global navigation satellite system) terminal of engineering mechanical equipment, which comprises the following steps:
Firstly, after an emergency unlocking button is pressed and the duration time reaches 5s, displaying a letter A and flashing by an 8-segment nixie tube, immediately releasing a key at the moment, and starting timing by the GNSS terminal and entering an emergency unlocking state;
Secondly, pressing the key again after 5s to enter a password number input state, wherein the password has 4 digits, if the terminal does not detect key input within 3s continuously, the current password number is considered to be input completely, 8 sections of nixie tubes display the number of key pressing times, namely the current password number, the password number flickers, and the terminal enters the next password input state;
Thirdly, judging whether the input of the 4-digit password number is finished, if the input of the 4-digit password number is not finished and the key is not pressed within 10s, considering that the input of the password number is finished, and entering the next step; if the input of the fourth password number is finished, entering the next step after the key is released for 3 s;
Judging whether the password number is input correctly, if the password number is input correctly, outputting the CAN bus of the GNSS terminal to be in an unlocking state, wherein the nixie tube normally lights the letter A, and after the duration of 1 minute, the GNSS terminal exits from an emergency unlocking state and the nixie tube restores to the previous state; and if the password number is input incorrectly, unlocking is not carried out, the nixie tube normally lights the letter C for 10s, then the GNSS terminal exits from the emergency unlocking state, and the nixie tube restores to the previous state.
Preferably, in the second step, when the key is pressed once, the password number of the nixie tube is added with 1; the calculation is restarted from 0 if the key is pressed more than 9 times.
preferably, in the second step, the period of the password number flashing is 200 milliseconds on and 200 milliseconds off.
preferably, in the fourth step, when the nixie tube normally lights the letter a or C, the emergency unlocking button is in a failure state.
preferably, in the fourth step, the method for determining whether the password number is correct is as follows: and the GNSS terminal MCU compares whether the input password number is consistent with the password number calculated by the MCU.
Preferably, the method for generating the password number of the GNSS terminal comprises the following steps: calculating 4-bit password numbers by an algorithm on the basis of the terminal numbers and the year, month and day; the method specifically comprises the following steps:
(1) taking 4 bytes after the terminal number and 4 bytes of year, month and day, and taking 8 bytes together;
(2) substituting the 8 bytes into the above data by using an MD5 algorithm to calculate a result of 16 bytes;
(3) the 1 st and 3 rd bytes are merged into A, the 2 nd and 4 th bytes are merged into B, the 5 th and 7 th bytes are merged into C, the 6 th and 8 th bytes are merged into D, the (A + D) ^ ((B + C) -12)) +69 is calculated to obtain a cipher number, when the cipher number exceeds 4 bits, the lower 4 bits are taken, when the lower 4 bits are less than 4 bits, the upper 3 bits are complemented, and the 4 bits are complemented.
Preferably, when the GNSS terminal is in the locked state, the 8-segment nixie tube on the GNSS terminal may flash 1 or 2.
The invention provides a method for emergency unlocking by key input of a password, which can better solve the problem of failure of GPRS remote unlocking and solve the problem that remote vehicle locking and unlocking operations cannot be carried out on engineering mechanical equipment through a GPRS wireless communication network. The key is arranged on the GNSS terminal, a user only needs to operate the key, other factors are not depended on, the key can be unlocked only by inputting a correct password, and the key has considerable operability, safety and reliability.
Drawings
Fig. 1 is a flowchart illustrating a method for emergency unlocking of a GNSS terminal of an engineering mechanical device according to embodiment 1;
Fig. 2 is a schematic structural diagram of a GNSS terminal of the engineering machinery apparatus in embodiment 1.
Detailed Description
for a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples. It is to be understood that the examples are illustrative of the invention and not limiting.
Example 1
As shown in fig. 1, the embodiment provides an emergency unlocking method for a GNSS terminal of a piece of engineering machinery equipment, which includes the following steps:
firstly, after an emergency unlocking button is pressed and the duration time reaches 5s, displaying a letter A and flashing by an 8-segment nixie tube, immediately releasing a key at the moment, and starting timing by the GNSS terminal and entering an emergency unlocking state;
Secondly, pressing the key again after 5s to enter a password number input state, wherein the password has 4 digits, if the terminal does not detect key input within 3s continuously, the current password number is considered to be input completely, 8 sections of nixie tubes display the number of key pressing times, namely the current password number, the password number flickers, and the terminal enters the next password input state;
thirdly, judging whether the input of the 4-digit password number is finished, if the input of the 4-digit password number is not finished and the key is not pressed within 10s, considering that the input of the password number is finished, and entering the next step; if the input of the fourth password number is finished, entering the next step after the key is released for 3 s;
judging whether the password number is input correctly, if the password number is input correctly, outputting the CAN bus of the GNSS terminal to be in an unlocking state, wherein the nixie tube normally lights the letter A, and after the duration of 1 minute, the GNSS terminal exits from an emergency unlocking state and the nixie tube restores to the previous state; and if the password number is input incorrectly, unlocking is not carried out, the nixie tube normally lights the letter C for 10s, then the GNSS terminal exits from the emergency unlocking state, and the nixie tube restores to the previous state.
In the second embodiment, when the key is pressed once, the password number of the nixie tube is increased by 1; the calculation is restarted from 0 if the key is pressed more than 9 times.
in this embodiment, in the second step, the period of the password number flashing is 200 milliseconds on and 200 milliseconds off.
In the fourth step, when the nixie tube normally lights the letter a or C, the emergency unlocking button is in a disabled state.
In this embodiment, in step four, the method for determining whether the password number is correct includes: and the GNSS terminal MCU compares whether the input password number is consistent with the password number calculated by the MCU.
In this embodiment, the method for generating the password number of the GNSS terminal includes: calculating 4-bit password numbers by an algorithm on the basis of the terminal numbers and the year, month and day; the method specifically comprises the following steps:
(1) Taking 4 bytes after the terminal number and 4 bytes of year, month and day, and taking 8 bytes together;
(2) substituting the 8 bytes into the above data by using an MD5 algorithm to calculate a result of 16 bytes;
(3) The 1 st and 3 rd bytes are merged into A, the 2 nd and 4 th bytes are merged into B, the 5 th and 7 th bytes are merged into C, the 6 th and 8 th bytes are merged into D, the (A + D) ^ ((B + C) -12)) +69 is calculated to obtain a cipher number, when the cipher number exceeds 4 bits, the lower 4 bits are taken, when the lower 4 bits are less than 4 bits, the upper 3 bits are complemented, and the 4 bits are complemented.
the password number is generated by the method and is difficult to crack, so that the security of the password is improved.
in this embodiment, when the GNSS terminal is in the lock state, 8 pieces of nixie tubes on the GNSS terminal may blink to 1 or 2.
The embodiment provides a method for emergency unlocking by key input of a password, which can better solve the problem of GPRS remote unlocking failure and solve the problem that remote vehicle locking and unlocking operations cannot be performed on engineering mechanical equipment through a GPRS wireless communication network. The key is arranged on the GNSS terminal, a user only needs to operate the key, other factors are not depended on, the key can be unlocked only by inputting a correct password, and the key has considerable operability, safety and reliability.
the unlocking method is very intelligent, the GNSS terminal can judge whether the 4-digit password number is input completely or not and judge whether the password number is correct or not, and the unlocking is more convenient and safer.
As shown in fig. 2, the GNSS terminal 1, the 8-segment nixie tube 2, and the emergency unlocking button 3 have a waterproof function, and an operator only needs to operate the emergency unlocking button and look over the number of the 8-segment nixie tube, so that the password can be easily input, which is very convenient.
in the embodiment, a group of 4-bit passwords is input through the emergency unlocking button, the terminal MCU compares and judges whether the passwords are correct, if so, the terminal MCU immediately unlocks, and the unlocking validity period is 30 days. The unlocking has a validity period, so that the client cannot solve the GNSS terminal without control.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (7)
1. a method for emergently unlocking a GNSS terminal of engineering mechanical equipment is characterized by comprising the following steps: the method comprises the following steps:
Firstly, after an emergency unlocking button is pressed and the duration time reaches 5s, displaying a letter A and flashing by an 8-segment nixie tube, immediately releasing a key at the moment, and starting timing by the GNSS terminal and entering an emergency unlocking state;
Secondly, pressing the key again after 5s to enter a password number input state, wherein the password has 4 digits, if the terminal does not detect key input within 3s continuously, the current password number is considered to be input completely, 8 sections of nixie tubes display the number of key pressing times, namely the current password number, the password number flickers, and the terminal enters the next password input state;
thirdly, judging whether the input of the 4-digit password number is finished, if the input of the 4-digit password number is not finished and the key is not pressed within 10s, considering that the input of the password number is finished, and entering the next step; if the input of the fourth password number is finished, entering the next step after the key is released for 3 s;
Judging whether the password number is input correctly, if the password number is input correctly, outputting the CAN bus of the GNSS terminal to be in an unlocking state, wherein the nixie tube normally lights the letter A, and after the duration of 1 minute, the GNSS terminal exits from an emergency unlocking state and the nixie tube restores to the previous state; and if the password number is input incorrectly, unlocking is not carried out, the nixie tube normally lights the letter C for 10s, then the GNSS terminal exits from the emergency unlocking state, and the nixie tube restores to the previous state.
2. The method for emergency unlocking of the GNSS terminal of the engineering mechanical device as claimed in claim 1, wherein: in the second step, when the key is pressed once, the password number of the nixie tube is added with 1; the calculation is restarted from 0 if the key is pressed more than 9 times.
3. The method for emergency unlocking of the GNSS terminal of the engineering mechanical device as claimed in claim 2, wherein: in the second step, the period of the password digital flashing is 200 milliseconds on and 200 milliseconds off.
4. the method for emergency unlocking of the GNSS terminal of the engineering mechanical device as claimed in claim 3, wherein: in the fourth step, when the nixie tube normally lights the letter A or C, the emergency unlocking button is in a failure state.
5. The method for emergency unlocking of the GNSS terminal of the engineering mechanical device as claimed in claim 4, wherein: in the fourth step, the method for judging whether the password number is correct is as follows: and the GNSS terminal MCU compares whether the input password number is consistent with the password number calculated by the MCU.
6. The method for emergency unlocking of the GNSS terminal of the engineering mechanical device as claimed in claim 5, wherein: the password number generation method of the GNSS terminal comprises the following steps: calculating 4-bit password numbers by an algorithm on the basis of the terminal numbers and the year, month and day; the method specifically comprises the following steps:
(1) Taking 4 bytes after the terminal number and 4 bytes of year, month and day, and taking 8 bytes together;
(2) Substituting the 8 bytes into the above data by using an MD5 algorithm to calculate a result of 16 bytes;
(3) The 1 st and 3 rd bytes are merged into A, the 2 nd and 4 th bytes are merged into B, the 5 th and 7 th bytes are merged into C, the 6 th and 8 th bytes are merged into D, the (A + D) ^ ((B + C) -12)) +69 is calculated to obtain a cipher number, when the cipher number exceeds 4 bits, the lower 4 bits are taken, when the lower 4 bits are less than 4 bits, the upper 3 bits are complemented, and the 4 bits are complemented.
7. The method for emergency unlocking of the GNSS terminal of the engineering mechanical device as claimed in claim 6, wherein: when the GNSS terminal is in the locking state, 8 sections of nixie tubes on the GNSS terminal can flash 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910758723.0A CN110576828A (en) | 2019-08-16 | 2019-08-16 | Method for emergency unlocking of GNSS terminal of engineering mechanical equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910758723.0A CN110576828A (en) | 2019-08-16 | 2019-08-16 | Method for emergency unlocking of GNSS terminal of engineering mechanical equipment |
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| CN110576828A true CN110576828A (en) | 2019-12-17 |
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| CN201910758723.0A Pending CN110576828A (en) | 2019-08-16 | 2019-08-16 | Method for emergency unlocking of GNSS terminal of engineering mechanical equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111784875A (en) * | 2020-06-23 | 2020-10-16 | 惠州拓邦电气技术有限公司 | Alternative input method and device when key is damaged and intelligent lock |
| CN113050124A (en) * | 2021-04-09 | 2021-06-29 | 广州南方卫星导航仪器有限公司 | Locking and unlocking method and system of GNSS receiver based on Bluetooth |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113050124A (en) * | 2021-04-09 | 2021-06-29 | 广州南方卫星导航仪器有限公司 | Locking and unlocking method and system of GNSS receiver based on Bluetooth |
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Application publication date: 20191217 |