CN117978841A

CN117978841A - Frequency converter management method and system

Info

Publication number: CN117978841A
Application number: CN202410090493.6A
Authority: CN
Inventors: 关伟杰; 李晨晖; 陈康超
Original assignee: Zhuhai Taiwei Electronic Co ltd
Current assignee: Zhuhai Taiwei Electronic Co ltd
Priority date: 2024-01-23
Filing date: 2024-01-23
Publication date: 2024-05-03

Abstract

The application discloses a management method and system of a frequency converter, and relates to the field of control. According to the application, the equipment provider only needs to set the first allowable running time and the encryption password, after the first allowable running time arrives, the equipment provider decrypts according to the characteristic code displayed by the frequency converter, and can realize continuous encryption or non-encryption of the next period by inputting different decryption passwords according to the actual situation of the equipment user, and the allowable running time of the next period can be set at will. The encryption password and the allowable running deadline are not directly transmitted between the upper computer and the frequency converter, the decryption password is changed in each allowable time period, and the possibility of cracking the password is greatly reduced.

Description

Frequency converter management method and system

Technical Field

The present application relates to the field of control, and in particular, to a method and a system for managing a frequency converter.

Background

In many applications of the frequency converter, the device provider needs to limit the allowed operation time of the frequency converter, which is generally implemented by setting the allowed operation time and the encryption password for the frequency converter by personnel of the device provider, so that the frequency converter can only operate for a specified period of time, and beyond the period of time, the device user must contact the device provider to output the encryption password on the frequency converter for decryption and reset the new allowed operation time if the frequency converter wants to continue to operate. It follows that when the frequency converter stops working, the equipment provider directly inputs the encryption password and allows the possibility that sensitive information can be leaked by the operation time.

Disclosure of Invention

The embodiment of the application provides a management method and a management system of a frequency converter, which can solve the problem of low safety caused by directly inputting an encryption password on the frequency converter and allowing operation time in the prior art. The technical scheme is as follows:

in a first aspect, an embodiment of the present application provides a method for managing a frequency converter, where the method includes:

The frequency converter calculates an nth feature code according to the nth encryption password and the nth group number;

the frequency converter starts to operate;

when the frequency converter detects that the nth allowable operation deadline is reached, stopping operation, and displaying the nth feature code, the nth group number and the current time on a display unit;

the upper computer acquires the nth feature code and the nth group number;

The upper computer acquires the n+1th allowable running deadline input by a user;

the upper computer reversely pushes out an nth encryption password according to the nth feature code and the nth group number, and calculates an (n+1) th decryption password A and an (n+1) th decryption password B according to the nth encryption password and the (n+1) th allowable running deadline;

the frequency converter acquires an n+1th decryption password A and an n+1th decryption password B;

The frequency converter calculates an n+1th encryption password according to the n-th encryption password and the current time;

The frequency converter calculates n+1th allowable running deadline according to the n+1th decryption password A and the n+1th decryption password B;

the frequency converter starts to operate;

the frequency converter generates an n+1th feature code according to the n+1th encryption password and the n+1th group number;

when the n+1th allowable running cut-off time arrives, the frequency converter displays the n+1th feature code, the n+1th group number and the current time.

In a second aspect, an embodiment of the present application provides a management system for a frequency converter, including: the frequency converter is connected with the upper computer;

the frequency converter is used for calculating an nth characteristic code according to an nth encryption password and an nth group number;

Starting to operate;

Stopping operation when the n-th allowable operation deadline is detected, and displaying the n-th feature code, the n-th feature code of the current time, the n-th group number and the current time on a display unit;

The upper computer is used for acquiring the nth feature code and the nth group number;

acquiring the n+1th allowable running deadline input by a user;

Reversely pushing out an nth encryption password according to the nth feature code and the nth group number, and calculating an (n+1) th decryption password A and an (n+1) th decryption password B according to the nth encryption password and an (n+1) th allowable running deadline;

The frequency converter is also used for acquiring an n+1th decryption password A and an n+1th decryption password B;

Calculating an n+1th encryption password according to the n-th encryption password and the current time;

Calculating an n+1th allowable running deadline according to the n+1th decryption password A and the n+1th decryption password B;

Starting to operate;

generating an n+1th feature code according to the n+1th encryption password and the n+1th group number;

and when the n+1th allowable running deadline arrives, displaying the n+1th feature code, the n+1th group number and the current time.

In a third aspect, embodiments of the present application provide a computer storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform the above-described method steps.

In a fourth aspect, an embodiment of the present application provides a frequency converter or an upper computer, which may include: a processor and a memory; wherein the memory stores a computer program adapted to be loaded by the processor and to perform the above-mentioned method steps.

The technical scheme provided by the embodiments of the application has the beneficial effects that at least:

① The equipment provider does not need to manage the encryption password of the frequency converter, and only needs to remember the password of the administrator.

② The encryption password and the allowable running deadline are not directly transmitted between the upper computer and the frequency converter, the decryption password is changed in each allowable time period, and the possibility of cracking the password is greatly reduced.

③ The decryption is flexible, and the equipment user can calculate the decryption password through the upper computer software only by sending the digital photographing displayed by the frequency converter back to the upper computer.

④ The encryption is flexible, and the allowable running deadline of the next group can be freely set during decryption according to actual conditions.

⑤ The next group of passwords are automatically calculated and written, no additional operation is needed, and the interference of personnel of a device user is avoided.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a system architecture according to an embodiment of the present application;

fig. 2 is a flow chart of a method for managing a frequency converter according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the following detailed description of the embodiments of the present application will be given with reference to the accompanying drawings.

Fig. 1 shows a system architecture of a management system of a frequency converter which can be applied to the present application.

As shown in fig. 1, the system architecture may include: an upper computer 101 and a frequency converter 102. The upper computer 101 and the frequency converter 102 may communicate via a network, which is used as a medium for providing a communication link between the above units. The network may include various types of wired or wireless communication links, such as: the wired communication link may include an optical fiber, twisted pair, or coaxial cable, etc., and the wireless communication link may include a Bluetooth communication link, a wireless fidelity (WIreless-FIdelity, wi-Fi) communication link, a microwave communication link, etc.

The host computer 101 is a variety of devices having a display screen including, but not limited to, a smart phone, a tablet computer, a laptop portable computer, a desktop computer, and the like.

The display equipment display can be various equipment capable of realizing the display function, and the camera is used for collecting video streams; for example: the display device may be a cathode ray tube display (cathode ray tube display, CR for short), a light-emitting diode display (light-emitting diode display, LED for short), an electronic ink screen, a Liquid Crystal Display (LCD) screen, a plasma display panel (PLASMA DISPLAY PANEL, PDP for short), or the like. The user can view the displayed text, picture, video and other information by using the display device on the control device.

It should be understood that the number of upper computers and frequency converters in fig. 1 is merely illustrative. Any number of upper computers and frequency converters may be used as desired.

Referring to fig. 2, a flow chart of a method for managing a frequency converter is provided in an embodiment of the application. As shown in fig. 2, the method according to the embodiment of the present application may include the following steps:

s201, the frequency converter calculates an nth feature code according to the nth encryption password and the nth group number.

The frequency converter stores an nth encryption password and an nth group number, the encryption password is used for encrypting the frequency converter, the group number represents the sequence number of the encryption password, and the group number can be increased by taking 1 as a step length from 1. n is an integer, n=1, 2,3 ….

In the embodiment of the present application, when n=1, the 1 st encryption password is set by the administrator in the frequency converter, and the process of setting the 1 st encryption password may be: the frequency converter displays a management interface, a user inputs a password based on the management interface, when the frequency converter verifies that the password is an administrator password, the frequency converter enters a management mode, and then the user inputs a 1 st encryption password and a 1 st allowable running deadline on the management interface according to a prompt message. The allowed operation cut-off time means a cut-off time for which the frequency converter is allowed to operate, and the allowed operation cut-off time should be later than the current time, for example: the current time is 2023, 1 month and 1 day, and the 1 st allowable running deadline is 2024, 1 month and 1 day.

The frequency converter is preset with an encryption algorithm, the encryption algorithm is used for generating the characteristic codes from the input encryption passwords and the group numbers, equipment suppliers can set different encryption algorithms according to different clients, and the operation process of the encryption algorithm can be determined according to actual requirements.

In some embodiments of the present application, the frequency converter may generate the feature code from the encryption key and the group number using the following procedure.

Step 1: the encryption password is converted into a 16-ary number, i.e., 0-0xffff. Wherein, the range of the encryption password is between 0 and 65536.

Step 2: extracting 15-12 bits of data of the 16-bit number and assigning the data to a variable TempAx; extracting 11-8 bits of data and assigning the extracted bits of data to a variable TempBx; extracting 7-4 bits of data and assigning the extracted 7-4 bits of data to a variable TempCx; 3-0 bits are extracted and assigned to variables TempDx.

Step 3: the remainder of group number and 4 is assigned to heel variable TempEx.

Step 4: variable TempAx, tempBx, tempCx, tempDx, tempEx is updated according to the following formula.

a＝TempEx；

b＝a+2；

c＝a+1；

d＝a；

if(a>＝4)

{

a＝a-4；

}

if(b>＝4)

{

b＝b-4；

}

if(c>＝4)

{

c＝c-4；

}

if(d>＝4)

{

d＝d-4；

}

for(j＝0；j<4；j++)

{

TempFx[j]＝(((TempAx&(0x0001<<a))>>a)<<0)+(((TempBx&(0x0001<<b))>>b)<<1)+(((TempCx&(0x0001<<c))>>c)<<2)+(((TempDx&(0x0001<<d))>>d)<<3);

a++；

b＝a+2；

c＝a+1；

d＝a；

if(a>＝4)

{

a＝a-4；

}

if(b>＝4)

{

b＝b-4；

}

if(c>＝4)

{

c＝c-4；

}

if(d>＝4)

{

d＝d-4；

}

}。

Updated variable TempAx = TempFx [0] < <4+tempfx [1].

Updated variable TempBx = TempFx [2] < <4+tempfx [3].

Step 5: variables TempAx and TempBx continue to be updated according to the data iteration process.

Step 6: the final signature= TempBx < <8+tempax is calculated.

The process of generating the final feature code in steps 1 to 6 will be described below with reference to a specific example.

Suppose the 1 st encryption password is 12345 and the corresponding 1 st group number is 7. The 1 st encryption password 12345 is converted into a 16-ary number 0x3039.

Extracting 15-12 bit data in the 16-ary number 0x3039 and assigning values to variables: tempAx = 3; extracting 11-8 bit data and assigning values to variables: tempBx = 0; extracting 7-4 bits of data and assigning the extracted bits of data to a variable TempCx =3; the 3-0 bit data is extracted and assigned to variable TempDx =9.

Group No. 1, 7 and 4 are found and named after remainder assigned to variables: tempEx = 3.

Calculating updated variables according to the formula of step 5: tempAx = TempFx [0] < <4+tempfx [1] = 205, tempbx = TempFx [2] < <4+tempfx [3] = 16.

The final signature= TempBx < < 8+tempax= 17908 is calculated according to the iterative procedure of step 6.

It should be noted that, the process of generating the feature code according to the encryption password and the group number is not limited to the process of step 1 to step 6, and the device provider of the frequency converter can perform the customization according to the requirement, and only the same set of the generated feature code and the numerical range of the encryption password, namely, the value ranges of 0 to 65536, is required to be satisfied.

S202, starting the operation of the frequency converter.

After receiving the operation instruction, the frequency converter starts normal operation until the nth allowable operation deadline comes.

And S203, stopping the operation of the frequency converter when detecting that the nth allowable operation deadline arrives, and displaying the nth feature code, the nth group number and the current time on a display unit.

For example: the nth allowable operation cutoff time set in step S201 is 2024, 1, and when the frequency converter detects 2024, 1, coming, the operation is stopped, the feature code calculated in S201, the nth group number, and the current time are displayed on the display unit, which may be a nixie tube or a display screen, etc., and the current time is represented by year, month, and date, for example: the current time is expressed as 2024, 1 month and 2 days.

S204, the upper computer acquires the nth feature code and the nth group number.

The manner of the upper computer obtaining the nth feature code and the nth group number may be: the nth feature code and the nth group number are directly input on the upper computer, or the upper computer and the frequency converter are communicated, so that the nth feature code and the nth group number are obtained.

S205, the upper computer receives the input n+1th allowable running cut-off time.

When the equipment provider needs to encrypt the frequency converter, inputting an n+1th allowable running cut-off time into the upper computer; when the equipment provider does not need to encrypt the frequency converter, the current time is input into the upper computer, the upper computer determines whether to continuously encrypt the frequency converter according to the input time, namely, the input time is n+1th allowable operation cut-off time when the input time is later than the current time, and if the input time is the current time, the frequency converter is not encrypted, and the frequency converter stops operating when the nth allowable operation cut-off time arrives.

S206, the upper computer reversely pushes out an nth encryption password according to the nth feature code and the nth group number, and calculates an (n+1) th decryption password A and an (n+1) th decryption password B according to the nth encryption password and the (n+1) th allowable running deadline.

The upper computer executes a decryption algorithm according to the nth feature code and the nth group number according to the encryption algorithm of S201 to reversely derive an nth encryption password, and then executes the encoding algorithm according to the nth encryption password and the n+1th allowable running deadline to generate an (n+1th) decryption password a and an (n+1th) decryption password B, which may be specifically:

And reversely pushing out the nth encryption password according to the nth feature code and the nth group number, and taking the upper 3 bits of the nth encryption password as Bx and the lower 3 bits as Cx.

Judging whether the difference Dx between the year of the n+1th allowable operation deadline and the current year is smaller than a preset value, if so, calculating Dx=the year of the n+1th allowable operation deadline-the current year; if not, an error reporting prompt is performed, for example: the preset value is 9, i.e. the difference of the year of the n+1th allowable run deadline minus the current year must satisfy less than 9 years.

According to a preset annual date data conversion table, converting the date of the n+1th allowable running deadline to obtain a new date, and converting Dx to obtain a new year.

And splicing the month allowing the running deadline and Bx to obtain an n+1th decryption password A, and splicing the new date, cx and the new year to obtain a decryption password B.

For example: the nth feature code is 17908, the nth group number is 7, the n+1th allowable running deadline is 2027, 9 months and 5 days, and the current time is 2024, 1 month and 15 days.

According to the nth signature code and the group number, the nth encryption password ax=12345 is reversely deduced, the upper 3 bits of the encryption password are bx=123, and the lower 2 bits are cx=45.

Year 2027, date 05, n+1th allowable run deadline; when the current year is 2024, the preset value is 9, dx=2027-2024=3, the preset year-day data conversion table is shown in table 1, and the table lookup shows that the new year corresponding to dx=3 is 9, and the new date corresponding to date 05 is 05.

Raw data	Post-conversion new data
		0	3
1	0
		2	2
3	9
		4	1
5	5
		6	7
7	6
		8	8
9	4

TABLE 1

Splicing the (09) month and the Bx (123) of the (n+1) th allowable running deadline to obtain an encrypted password A=09123, and splicing the new date (05), the Cx (45) and the new year (09) to obtain a decryption decoding B=05459.

S207, the frequency converter acquires an n+1th decryption password A and an n+1th decryption password B.

The method for the frequency converter to obtain the (n+1) th decryption password A and the (n+1) th decryption password B may be: the user manually inputs the signals according to the input unit of the frequency converter, or the frequency converter and the upper computer communicate and acquire the signals.

S208, the frequency converter calculates an n+1th encryption password according to the n-th encryption password and the current time.

The frequency converter automatically calculates the (n+1) th encryption password according to the n-th encryption password and the current time by a preset algorithm, and the user is not required to manually set the password, for example: the preset algorithm for generating the n+1th encryption password=n encryption password+current year×100+current day+current month×10+current month×current month is not limited to the above formula, and may be adjusted according to actual requirements.

S209, the frequency converter calculates the n+1th allowable running deadline according to the n+1th decryption password A and the n+1th decryption password B.

The frequency converter calculates the n+1th allowable running deadline according to the inverse operation of the coding algorithm of S206, the n+1th decryption password A and the n+1th decryption password B.

S210, starting the operation of the frequency converter.

The frequency converter starts to operate after receiving the operation instruction.

S211, the frequency converter generates an n+1th feature code according to the n+1th encryption password and the n+1th group number.

The frequency converter generates an n+1th feature code according to the n+1th encryption password and the n+1th group number according to the process of S201.

S212, stopping operation when the n+1th allowable operation deadline arrives, and displaying the n+1th feature code, the n+1th group number and the current time on a display unit by the frequency converter.

Wherein if the equipment provider continues to operate the frequency converter, execution may continue from S204.

The embodiment of the application has the following beneficial effects:

The embodiment of the present application further provides a computer storage medium, where the computer storage medium may store a plurality of instructions, where the instructions are adapted to be loaded by a processor and execute the steps of the method shown in the embodiment of fig. 2, and the specific execution process may refer to the specific description of the embodiment shown in fig. 2, which is not repeated herein.

The present application also provides a computer program product storing at least one instruction that is loaded and executed by the processor to implement the method of managing a frequency converter according to the above embodiments.

Referring to fig. 3, a schematic structural diagram of an electronic device is provided in an embodiment of the present application. The electronic device may be the upper computer or the frequency converter in fig. 1. As shown in fig. 3, the electronic device 300 may include: at least one processor 301, at least one network interface 304, a user interface 303, a memory 305, at least one communication bus 302.

Wherein the communication bus 302 is used to enable connected communication between these components.

The user interface 303 may include a Display screen (Display), a Camera (Camera), and the optional user interface 303 may further include a standard wired interface, and a wireless interface.

The network interface 304 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), among others.

Wherein the processor 301 may include one or more processing cores. The processor 301 utilizes various interfaces and lines to connect various portions of the overall electronic device 300, perform various functions of the electronic device 300, and process data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 305, and invoking data stored in the memory 305. Alternatively, the processor 301 may be implemented in at least one hardware form of digital signal Processing (DIGITAL SIGNAL Processing, DSP), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA), programmable logic array (Programmable Logic Array, PLA). The processor 301 may integrate one or a combination of several of a central processing unit (Central Processing Unit, CPU), an image processor (Graphics Processing Unit, GPU), and a modem, etc. The CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for rendering and drawing the content required to be displayed by the display screen; the modem is used to handle wireless communications. It will be appreciated that the modem may not be integrated into the processor 301 and may be implemented by a single chip.

The Memory 305 may include a random access Memory (RandomAccess Memory, RAM) or a Read-Only Memory (Read-Only Memory). Optionally, the memory 305 includes a non-transitory computer readable medium (non-transitory computer-readable storage medium). Memory 305 may be used to store instructions, programs, code, sets of codes, or sets of instructions. The memory 305 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the above-described respective method embodiments, etc.; the storage data area may store data or the like referred to in the above respective method embodiments. Memory 305 may also optionally be at least one storage device located remotely from the aforementioned processor 301. As shown in fig. 3, an operating system, a network communication module, a user interface module, and application programs may be included in the memory 305, which is a type of computer storage medium.

In the electronic device 300 shown in fig. 3, the user interface 303 is mainly used for providing an input interface for a user, and acquiring data input by the user; when the electronic device 300 is an upper computer, the processor 301 may be configured to call an application program stored in the memory 305, and specifically execute steps that the upper computer is an execution subject in fig. 2; when the electronic device 300 is a frequency converter, the processor 301 may be configured to invoke an application program stored in the memory 305, and specifically perform the steps of the frequency converter as the main implementation in fig. 2. The specific process may be illustrated with reference to fig. 2, and will not be described here again.

Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored on a computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory, a random access memory, or the like.

The foregoing disclosure is illustrative of the present application and is not to be construed as limiting the scope of the application, which is defined by the appended claims.

Claims

1. A method for managing a frequency converter, comprising:

the frequency converter starts to operate;

the upper computer acquires the nth feature code and the nth group number;

the frequency converter starts to operate;

2. The method as recited in claim 1, further comprising:

receiving an input password;

And when the password is the administrator password, entering a management mode, and setting the 1 st allowable running deadline and the 1 st encryption password in the management mode.

3. The method according to claim 1 or 2, wherein said calculating the n+1th decryption key a and the n+1th decryption key B from the n-th encryption key and the n+1th allowable run-time deadline comprises:

Taking the upper 3 bits of the nth encryption password as Bx and the lower 3 bits as Cx;

Judging whether the difference Dx between the year of the n+1th allowable operation deadline and the current year is smaller than a preset value, if so, calculating Dx=the year of the n+1th allowable operation deadline-the current year; if not, carrying out error reporting prompt;

according to a preset annual date data conversion table, converting the date of the n+1st allowable running deadline to obtain a new date, and converting Dx to obtain a new year;

4. A method according to claim 3, wherein the predetermined daily data conversion table is associated with a customer identification.

5. The method of claim 4, wherein the frequency converter calculates an n+1th encryption code from the n-th encryption code and the current time, comprising:

Calculating an n+1th encryption password according to the formula:

n+1th encryption password=nth encryption password+current year×100+current day+current month×10+current month.

6. A management system for a frequency converter, comprising: the frequency converter is connected with the upper computer;

Starting to operate;

stopping operation when the n-th allowable operation deadline is detected, and displaying the n-th feature code, the n-th group number and the current time on a display unit;

acquiring the n+1th allowable running deadline input by a user;

Starting to operate;