CN108896865B - Fuse determination method and device for automobile and storage medium - Google Patents
Fuse determination method and device for automobile and storage medium Download PDFInfo
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- CN108896865B CN108896865B CN201811056134.XA CN201811056134A CN108896865B CN 108896865 B CN108896865 B CN 108896865B CN 201811056134 A CN201811056134 A CN 201811056134A CN 108896865 B CN108896865 B CN 108896865B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/74—Testing of fuses
Abstract
The invention discloses a method and a device for determining a fuse of an automobile and a storage medium, and belongs to the technical field of vehicle engineering. The method comprises the following steps: acquiring the type of current of a load in a wire harness loop input to an automobile; determining a capacity of a fuse capable of protecting the harness loop based on a current type input to the load; determining a fuse protecting the harness loop based on a capacity of the fuse. The method and the device determine the fuse for protecting the wire harness loop according to the type of the current input to the load in the wire harness loop, and ensure that the determined fuse is matched with the load and the current input to the load because the determined fuse is related to the type of the current input to the load, thereby ensuring the protection function of the fuse on the wire harness loop and improving the accuracy of determining the fuse of the automobile.
Description
Technical Field
The invention relates to the technical field of vehicle engineering, in particular to a method and a device for determining a fuse of an automobile and a storage medium.
Background
With the development of the automobile industry, more and more electric devices are mounted on an automobile, and when the electric devices on the automobile work, if a wiring harness loop where the electric devices are located has no protection measures, the automobile may bring hidden dangers to the safety of the automobile during the working process of the electric devices. Therefore, in order to avoid safety hazards to the vehicle due to the use of the electric devices, the harness loop where the electric devices are located may be generally protected by a fuse. However, since the load capacity of the harness circuit differs among the electric devices, the influence on the vehicle also differs, and if the fuse is not properly selected, the fuse may not be able to protect the harness circuit, and therefore, a fuse determination method for the vehicle is required.
Disclosure of Invention
The embodiment of the invention provides a method and a device for determining a fuse of an automobile and a storage medium, which are used for solving the problem that a wiring harness loop cannot be protected due to improper fuse selection in the related technology. The technical scheme is as follows:
in a first aspect, a method for determining a fuse of a vehicle is provided, the method comprising:
acquiring the type of current of a load in a wire harness loop input to an automobile;
determining a capacity of a fuse capable of protecting the harness loop based on a current type input to the load;
determining a fuse protecting the harness loop based on a capacity of the fuse.
Optionally, after obtaining the current type of the load in the wire harness loop input to the automobile, the method further includes:
determining an electrical characteristic of a load in the harness loop;
determining a type of fuse protecting the harness loop based on the electrical characteristic;
accordingly, the determining a fuse to protect the harness loop based on the current capacity includes:
determining a fuse protecting the harness loop based on the current capacity and the type of the fuse.
Optionally, the determining, based on the current type of the load, a capacity of a fuse capable of protecting the harness loop includes:
when the type of the current input to the load is a steady-state current, acquiring the power of the load, the rated working voltage and the temperature value of the environment where the load is located;
dividing the power of the load by the rated working voltage to obtain a working current input to the load;
acquiring a temperature reduction coefficient value corresponding to the temperature value from a stored temperature reduction coefficient curve of the fuse;
determining a capacity of a fuse capable of protecting the harness loop based on the operating current of the load and the temperature reduction rate value.
Optionally, the determining, based on the current type of the load, a capacity of a fuse capable of protecting the harness loop includes:
when the type of the current input to the load is pulse current, determining the accumulated current energy of the pulse current and the fusing energy of the fuse within a preset time length;
dividing the accumulated current energy of the pulse current by the fusing energy of the fuse to obtain the maximum current energy for preventing the fuse from fusing;
and determining the capacity of the fuse capable of protecting the wire harness loop according to the maximum current energy for preventing the fuse from being fused.
Optionally, the determining, based on the current type of the load, a current capacity of a fuse capable of protecting the harness loop includes:
when the type of the current input to the load is surge current, current energy accumulated by the surge current and fusing energy of a fuse are determined within a preset time period;
dividing the current energy accumulated by the surge current by the fusing energy of the fuse to obtain the maximum current energy for preventing the fuse from fusing;
and determining the capacity of the fuse capable of protecting the wire harness loop according to the maximum current energy for preventing the fuse from being fused.
Optionally, after determining the fuse for protecting the harness loop based on the current capacity, the method further includes:
determining a wire specification of a wire connected to the fuse;
determining a current characteristic curve of the wire based on the wire gauge and determining a current characteristic curve of the fuse;
and determining that the fuse is selected to be qualified when the current of the wire is determined to be larger than the current of the fuse at each moment based on the current characteristic curve of the wire and the current characteristic curve of the fuse.
In a second aspect, there is provided a fuse determining apparatus of an automobile, the apparatus comprising:
the acquisition module is used for acquiring the type of current of a load in a wire harness loop input to an automobile;
a first determination module for determining a capacity of a fuse capable of protecting the harness loop based on a type of current input to the load;
and the second determination module is used for determining the fuse for protecting the wire harness loop based on the capacity of the fuse.
Optionally, the apparatus further comprises:
a third determination module for determining an electrical characteristic of a load in the wire harness loop;
a fourth determination module for determining a type of fuse protecting the harness loop based on the electrical characteristic;
accordingly, the second determining module is configured to:
determining a fuse protecting the harness loop based on the current capacity and the type of the fuse.
Optionally, the first determining module includes:
the first obtaining submodule is used for obtaining the power of the load, the rated working voltage and the temperature value of the environment where the load is located when the type of the current input to the load is a steady-state current;
the first calculation submodule is used for dividing the power of the load by the rated working voltage to obtain the working current input to the load;
the second obtaining submodule is used for obtaining a temperature reduction rate value corresponding to the temperature value from a stored temperature reduction coefficient curve of the fuse;
a first determination submodule for determining a capacity of a fuse capable of protecting the harness loop based on the operating current of the load and the temperature reduction rate value.
Optionally, the first determining module includes:
the second determining submodule is used for determining the accumulated current energy of the pulse current and the fusing energy of the fuse within a preset time length when the type of the current input to the load is the pulse current;
the second calculation submodule is used for dividing the current energy accumulated by the pulse current by the fusing energy of the fuse to obtain the maximum current energy for preventing the fuse from fusing;
and the third determining submodule is used for determining the capacity of the fuse capable of protecting the wire harness loop according to the maximum current energy for preventing the fuse from being fused.
Optionally, the first determining module includes:
the fourth determining submodule is used for determining the accumulated current energy of the surge current and the fusing energy of the fuse within a preset time when the type of the current input to the load is the surge current;
the third calculation submodule is used for dividing the accumulated current energy of the surge current by the fusing energy of the fuse to obtain the maximum current energy for preventing the fuse from fusing;
and the fifth determining submodule is used for determining the capacity of the fuse capable of protecting the wire harness loop according to the maximum current energy for preventing the fuse from being fused.
Optionally, the apparatus further comprises:
a fifth determining module for determining a wire specification of a wire connected to the fuse;
a sixth determining module, configured to determine a current characteristic curve of the wire based on the wire specification, and determine a current characteristic curve of the fuse;
and the seventh determining module is used for determining that the fuse is selected to be qualified when the current of the wire is determined to be larger than the current of the fuse at each moment based on the current characteristic curve of the wire and the current characteristic curve of the fuse.
In a third aspect, a computer-readable storage medium is provided, wherein a computer program is stored in the storage medium, and when executed by a processor, the computer program implements any one of the methods provided in the first aspect.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
in the embodiment of the invention, the current type of the load input into the wire harness loop can be obtained, the fuse for protecting the wire harness loop is determined according to the current type, and the determined fuse is related to the current type input into the load, so that the determined fuse is matched with the load and the current input into the load, the protection function of the fuse on the wire harness loop is ensured, and the accuracy of determining the fuse of the automobile is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for determining fuses of an automobile according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for determining fuses of an automobile according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a steady state current provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of a pulsed current provided by an embodiment of the present invention;
FIG. 5 is a schematic diagram of an inrush current provided by an embodiment of the present invention;
FIG. 6 is a schematic diagram of a temperature reduction coefficient curve of a fuse according to an embodiment of the present invention;
FIG. 7 is a pulse period curve diagram of a fuse according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a current characteristic of a lead and a fuse according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a fuse determining apparatus for a first vehicle according to an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a fuse determining apparatus of a second vehicle according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a first determining module according to an embodiment of the present invention;
FIG. 12 is a schematic structural diagram of a second first determining module according to an embodiment of the present invention;
FIG. 13 is a block diagram of a third determining module according to an embodiment of the present invention;
FIG. 14 is a schematic structural diagram of a fuse determining apparatus of a third vehicle according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Before explaining the embodiments of the present invention in detail, an application scenario related to the embodiments of the present invention is explained.
Currently, with the development of automobile technology, more and more electric devices are available in automobiles, such as vehicle-mounted terminals, vehicle-mounted air conditioners, and the like, and these electric devices form a wire harness loop as a load. In order to avoid the safety threat to the automobile caused by the electric devices during operation, the wiring harness loop is generally protected by a fuse. However, since the load capacity of the harness circuit differs between different electric devices, the influence on the vehicle also differs, and if the fuse is not properly selected, the function of protecting the harness circuit may not be performed.
Based on such a scenario, the embodiment of the invention provides a fuse determining method for an automobile, which improves the safety of a wire harness loop.
After describing the application scenario of the embodiment of the present invention, the method for determining a fuse of an automobile according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for determining a fuse of an automobile according to an embodiment of the present invention, and referring to fig. 1, the method is applied to a terminal and includes the following steps.
Step 101: the type of current input to a load in a harness loop of an automobile is obtained.
Step 102: the capacity of a fuse capable of protecting the harness loop is determined based on the type of current input to the load.
Step 103: based on the capacity of the fuse, a fuse that protects the harness loop is determined.
In the embodiment of the invention, the current type of the load input into the wire harness loop can be obtained, the fuse for protecting the wire harness loop is determined according to the current type, and the determined fuse is related to the current type input into the load, so that the determined fuse is matched with the load and the current input into the load, the protection function of the fuse on the wire harness loop is ensured, and the accuracy of determining the fuse of the automobile is improved.
Optionally, after obtaining the current type of the load in the wire harness loop input to the automobile, the method further includes:
determining an electrical characteristic of a load in the harness loop;
determining a type of fuse protecting the harness loop based on the electrical characteristic;
accordingly, determining a fuse to protect the harness loop based on the current capacity includes:
based on the current capacity and the type of the fuse, a fuse that protects the harness loop is determined.
Optionally, determining a capacity of a fuse capable of protecting the harness loop based on the current type of the load includes:
when the current type input to the load is a steady-state current, acquiring the power, the rated working voltage and the temperature value of the environment where the load is located;
dividing the power of the load by the rated working voltage to obtain a working current input to the load;
acquiring a temperature reduction coefficient value corresponding to the temperature value from a stored temperature reduction coefficient curve of the fuse;
based on the operating current of the load and the temperature reduction rate value, a capacity of a fuse capable of protecting the harness loop is determined.
Optionally, determining a capacity of a fuse capable of protecting the harness loop based on the current type of the load includes:
when the type of the current input to the load is pulse current, determining the accumulated current energy of the pulse current and the fusing energy of the fuse within a preset time length;
dividing the current energy accumulated by the pulse current by the fusing energy of the fuse to obtain the maximum current energy for preventing the fuse from fusing;
the capacity of the fuse capable of protecting the wire harness circuit is determined based on the maximum current energy at which the fuse is not blown.
Optionally, determining the current capacity of the fuse capable of protecting the harness loop based on the current type of the load includes:
when the type of the current input to the load is surge current, current energy accumulated by the surge current and fusing energy of the fuse are determined within a preset time;
dividing the current energy accumulated by the surge current by the fusing energy of the fuse to obtain the maximum current energy for preventing the fuse from fusing;
the capacity of the fuse capable of protecting the wire harness circuit is determined based on the maximum current energy at which the fuse is not blown.
Optionally, after determining the fuse for protecting the harness loop based on the current capacity, the method further includes:
determining a wire specification of a wire connected to the fuse;
determining a current characteristic curve of the wire based on the wire specification and determining a current characteristic curve of the fuse;
and determining that the fuse is selected to be qualified when the current of the wire is larger than the current of the fuse at each moment based on the current characteristic curve of the wire and the current characteristic curve of the fuse.
All the above optional technical solutions can be combined arbitrarily to form an optional embodiment of the present invention, which is not described in detail herein.
Fig. 2 is a flowchart of a method for determining a fuse of an automobile according to an embodiment of the present invention, and referring to fig. 2, the method includes the following steps.
Step 201: the terminal acquires a current type of a load in a wire harness loop input to the automobile.
Since the loads in the different harness loops are different, and thus the types of currents in the harness loops are different, the terminal needs to acquire the type of current input to the load in the harness loop of the automobile. The current types may include steady state current, pulsed current, and inrush current.
Since, in general, in order to provide a qualified fuse for a wire harness loop of an automobile, a terminal may generally obtain load information of the wire harness loop and obtain a current type of a load input into the wire harness loop of the automobile from the load information of the wire harness loop. The load information of the wire harness loop may be input to the terminal by a user through a designated operation, or may be acquired from another device when the terminal receives an information acquisition instruction.
It should be noted that the information acquisition instruction is used for acquiring load information of the wire harness loop, the information acquisition instruction may be triggered by a user through an instruction operation, and the specified operation may be a click operation, a slide operation, a long press operation, or the like.
Wherein, since different types of currents have different characteristics, for example, the current value of the steady-state current does not change in a steady state, as shown in fig. 3; the voltage value of the pulse current changes from low to high and then from high to low in the pulse generation period, and a stable current value similar to the steady-state current does not appear subsequently, as shown in fig. 4; the surge current is formed by superposing a steady-state current and a pulse current, so that the current value of a surge current point changes from low to high and then from high to low, and then a steady-state current value similar to the steady-state current appears subsequently, as shown in fig. 5. According to different current change conditions, the operation that the terminal obtains the current type input to the load in the automobile wire harness loop from the load information of the wire harness loop can be as follows: determining the change condition of a current signal in the load information, and determining the type of the current as a steady-state current when the current value indicated by the current signal is not changed within a preset time period; when the current value changes from low to high and then from high to low within a preset time period and a stable current value similar to a steady-state current does not appear subsequently, determining the type of the current as a pulse current; and when the current value changes from low to high and then from high to low and then a stable current value similar to the steady-state current appears subsequently, determining the type of the current as the surge current.
Further, since fuses used by different loads are different not only in capacity but also in type, the terminal can determine the electrical characteristics of the load in the harness loop after acquiring the type of current input to the load in the harness loop of the automobile; the type of fuse protecting the harness loop is determined based on the electrical characteristic.
It should be noted that fuses can be divided into slow fuses and fast fuses according to their fusing characteristics. The fast fuse is commonly used in a resistive circuit to protect some components which are particularly sensitive to current variation; the slow fuse is usually used in an inductive circuit and/or a capacitive circuit with a large surge current when the circuit state changes, for example, in a fan motor circuit, the slow fuse can bear the impact of surge pulses during startup and shutdown, and can still break the circuit quickly when a real fault occurs. Therefore, in order to select the appropriate fuse, the terminal needs to determine the electrical characteristics of the load in the harness loop; when the electrical characteristics indicate that the load forms a resistive circuit in the wire harness loop, determining the type of the fuse as a fast-fusing fuse; the type of fuse is determined to be a slow fuse when the electrical characteristic indicates that the load forms an inductive circuit and/or a capacitive circuit in the loop of the wiring harness.
Step 202: the terminal determines a current capacity of a fuse capable of protecting the harness loop based on a type of current input to the load.
As can be seen from the above, the type of current input to the load may be a steady-state circuit, a pulse current, or an inrush current, and the operation of determining the current capacity of the fuse capable of protecting the harness loop by the termination may include the following three cases depending on the type of current input to the load.
In the first situation, when the current type input to the load is a steady-state current, the terminal acquires the power of the load, the rated working voltage and the temperature value of the environment where the load is located; dividing the power of the load by the rated working voltage to obtain a working current input to the load; acquiring a temperature reduction coefficient value corresponding to the temperature value from a stored temperature reduction coefficient curve of the fuse; based on the operating current of the load and the temperature reduction rate value, a capacity of a fuse capable of protecting the harness loop is determined.
The power of the load, the rated operating voltage and the temperature value of the environment where the load is located may be imported into the terminal by a user through a specified operation, or may be obtained by the terminal from other devices when the terminal receives the information obtaining instruction.
Since the reduction rate of the fuse changes at different temperatures, the terminal needs to obtain a temperature reduction rate value corresponding to the temperature value of the environment where the fuse is located. In addition, the temperature reduction coefficient curve of the fuse is used to describe the corresponding relationship between the temperature value and the temperature reduction rate of the fuse, and as shown in fig. 6, the terminal may store the temperature reduction coefficient curve of the fuse in advance. Of course, the corresponding relationship between the temperature value and the temperature reduction rate of the fuse can be embodied not only by the temperature reduction coefficient curve, but also by other manners, such as a table manner and the like.
In addition, the terminal may determine the capacity of the fuse capable of protecting the harness loop through the following first formula based on the operating current of the load and the temperature reduction rate value.
Wherein, in the above formula (1), IfIs the capacity of a fuse, InThe RR is the operating current of the load, and the RR is the temperature reduction rate value of the fuse corresponding to the temperature value of the environment where the load is located.
In the second case, when the type of the current input to the load is pulse current, the terminal determines the current energy accumulated by the pulse current within a preset time and the fusing energy of the fuse; dividing the current energy accumulated by the pulse current by the fusing energy of the fuse to obtain the maximum current energy for preventing the fuse from fusing; the capacity of a fuse capable of protecting a wire harness circuit is determined based on the maximum current energy at which the fuse is not blown.
Since the fuse in the wire harness loop needs to bear enough pulse times and a steady-state current lasting for a certain time, the terminal needs to determine the maximum current energy capable of preventing the fuse from being blown through the current energy accumulated by the pulse current and the blowing energy of the fuse.
It should be noted that the current energy refers to the maximum energy impact generated within a time period, and the fusing energy of the fuse can be obtained by querying the terminal from the preset and stored specification information of the fuse product. The terminal can inquire the fusing energy of the fuse corresponding to the preset duration. The preset time period may be set in advance, for example, the preset time period may be 1 hour, 2 hours, or the like.
The terminal can determine the accumulated current energy of the pulse current in the preset time through the following second formula.
It should be noted that, in the above formula (2), Q is the current energy accumulated by the pulse current in the preset time period, and t1And t2At any two time points, and t1And t2The difference between them is a preset time length.
In addition, since the capacity of the fuse can be represented by the number of times of pulse current impact received by the fuse, the operation of the terminal determining the capacity of the fuse capable of protecting the wire harness loop according to the maximum current energy at which the fuse is not blown may be: and determining a plurality of pulse times corresponding to the energy less than the maximum current energy from the stored pulse cycle curve of the fuse, and determining any pulse time in the plurality of pulse times as the capacity of the fuse. See fig. 7.
In general, when the maximum current energy is greater than 30%, the terminal may directly determine that any one of the pulse numbers corresponding to the energy less than 30% is the capacity of the fuse. For example, when the maximum current energy is 41% of energy, the number of pulses corresponding to 20% of energy is determined as the capacity of the fuse.
In the third situation, when the type of the current input to the load is surge current, the terminal determines the current energy accumulated by the surge current within a preset time and the fusing energy of the fuse; dividing the current energy accumulated by the surge current by the fusing energy of the fuse to obtain the maximum current energy for preventing the fuse from fusing; the capacity of a fuse capable of protecting a wire harness circuit is determined based on the maximum current energy at which the fuse is not blown.
It should be noted that, for the operation of determining, by the terminal, the current energy accumulated by the inrush current and the fusing energy of the fuse within the preset time period and the operation of determining, according to the maximum current energy that causes the fuse not to be fused, the capacity of the fuse that can protect the wire harness loop may refer to the operation of the terminal when the current type is the pulse current in the second case, which is not described in detail in the embodiment of the present invention.
Step 203: the terminal determines a fuse protecting the harness loop based on the capacity of the fuse.
Since the determined capacity of the fuse is a capacity capable of withstanding the current surge, the terminal may determine the fuse having the same capacity as the determined capacity as the fuse of the protection wire harness circuit.
Further, as can be seen from the above step 201, the terminal can determine the fuse type of the protection harness loop after acquiring the current type of the load in the harness loop inputted to the automobile, and thus the terminal can also determine the fuse of the protection harness loop based on the current capacity and the fuse type. That is, the terminal may determine the fuse having the same capacity as the determined capacity and the same kind as the determined kind as the fuse of the protection harness circuit.
Step 204: and the terminal verifies whether the determined fuse is qualified.
In order to ensure that the fuse of the terminal can play a role in protecting the wiring harness loop, the terminal can verify whether the determined fuse is a qualified fuse.
Wherein the terminal can determine a wire specification of a wire connected to the fuse; determining a current characteristic curve of the wire based on the wire specification and determining a current characteristic curve of the fuse; and determining that the fuse is selected to be qualified when the current of the wire is greater than the current of the fuse at each moment based on the current characteristic curve of the wire and the current characteristic curve of the fuse. And determining that the fuse is not selected to be disqualified when the current of the wire is not greater than the current of the fuse at every moment.
The specification of the wire may be input to the terminal by a user through a designated operation, or may be obtained by the terminal from another device when receiving an information acquisition instruction. After the terminal acquires the wire specification, the current characteristic curve of the corresponding wire can be acquired according to the wire specification, and the current characteristic curve of the determined fuse can be acquired.
In addition, the current characteristic curve of the wire and the current characteristic curve of the fuse may be represented in the same image, see fig. 8, or may be represented in two different images. When embodied in the same image, the terminal can determine directly from the position of each point in the curve whether the current of the wire is greater than the current of the fuse at each instant.
In the embodiment of the invention, the terminal can acquire the current type of the load input into the wire harness loop and the electrical characteristics of the load, determine the type of the fuse according to the electrical characteristics of the load, determine the capacity of the fuse for protecting the wire harness loop according to the current type, and then determine the fuse for protecting the wire harness loop according to the type and the capacity of the fuse.
After explaining the fuse determining method for an automobile according to an embodiment of the present invention, a fuse determining apparatus for an automobile according to an embodiment of the present invention will be described.
Fig. 9 is a block diagram of a fuse determining apparatus for an automobile according to an embodiment of the present disclosure, and referring to fig. 9, the apparatus may be implemented by software, hardware, or a combination of the two. The device includes: an acquisition module 901, a first determination module 902 and a second determination module 903.
An obtaining module 901, configured to obtain a current type of a load in a wire harness loop input to an automobile;
a first determining module 902 for determining a capacity of a fuse capable of protecting the harness loop based on a type of current input to the load;
and a second determining module 903, configured to determine a fuse for protecting the wire harness loop based on a capacity of the fuse.
Optionally, referring to fig. 10, the apparatus further comprises:
a third determining module 904 for determining an electrical characteristic of a load in the harness loop;
a fourth determining module 905 configured to determine a kind of a fuse protecting the harness loop based on the electrical characteristic;
accordingly, the second determining module 903 is configured to:
determining a fuse protecting the harness loop based on the current capacity and the type of the fuse.
Optionally, referring to fig. 11, the first determining module 902 includes:
the first obtaining sub-module 9021 is configured to obtain, when the type of the current input to the load is a steady-state current, a power of the load, a rated operating voltage, and a temperature value of an environment where the load is located;
the first calculation submodule 9022 is configured to divide the power of the load by the rated working voltage to obtain a working current input to the load;
the second obtaining submodule 9023 is configured to obtain a temperature reduction rate value corresponding to the temperature value from a stored temperature reduction coefficient curve of the fuse;
a first determining submodule 9024, configured to determine, based on the operating current of the load and the temperature reduction rate value, a capacity of a fuse capable of protecting the harness loop.
Optionally, referring to fig. 12, the first determining module 902 includes:
the second determining submodule 9025 is configured to determine, when the type of the current input to the load is a pulse current, current energy accumulated by the pulse current and fusing energy of the fuse within a preset time period;
the second calculation submodule 9026 is configured to divide current energy accumulated by the pulse current by fusing energy of the fuse, so as to obtain maximum current energy for preventing the fuse from being fused;
and the third determining submodule 9027 is configured to determine, according to the maximum current energy for preventing the fuse from being fused, a capacity of the fuse capable of protecting the wire harness loop.
Optionally, referring to fig. 13, the first determining module 902 includes:
a fourth determining submodule 9028, configured to determine, when the type of the current input to the load is an inrush current, current energy accumulated by the inrush current and fusing energy of the fuse within a preset time period;
the third calculation submodule 9029 is configured to divide current energy accumulated by the inrush current by fusing energy of the fuse, so as to obtain maximum current energy for preventing the fuse from being fused;
and the fifth determining submodule 90210 is configured to determine, according to the maximum current energy for preventing the fuse from being blown, a capacity of a fuse capable of protecting the wire harness loop.
Optionally, referring to fig. 14, the apparatus further comprises:
a fifth determining module 906 for determining a wire specification of a wire connected to the fuse;
a sixth determining module 907 for determining a current characteristic curve of the wire based on the wire specification and determining a current characteristic curve of the fuse;
a seventh determining module 908 for determining that the fuse is eligible for selection when the current of the wire is determined to be greater than the current of the fuse at each time based on the current characteristic of the wire and the current characteristic of the fuse.
In summary, in the embodiment of the present invention, the terminal may obtain the current type of the load input into the wire harness loop and the electrical characteristics of the load, determine the type of the fuse according to the electrical characteristics of the load, determine the capacity of the fuse protecting the wire harness loop according to the current type, and then determine the fuse protecting the wire harness loop according to the type and the capacity of the fuse.
It should be noted that: in the fuse determining device for an automobile provided in the above embodiment, when determining a fuse of an automobile, only the division of the above functional modules is taken as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions. In addition, the fuse determining apparatus for an automobile and the fuse determining method embodiment for an automobile provided in the above embodiments belong to the same concept, and specific implementation processes thereof are detailed in the method embodiment and are not described herein again.
Fig. 15 shows a block diagram of a terminal 1500 according to an exemplary embodiment of the present invention. The terminal 1500 may be: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio layer iii, motion video Experts compression standard Audio layer 3), an MP4 player (Moving Picture Experts Group Audio layer IV, motion video Experts compression standard Audio layer 4), a notebook computer, or a desktop computer. Terminal 1500 may also be referred to as user equipment, a portable terminal, a laptop terminal, a desktop terminal, or other names.
In general, terminal 1500 includes: a processor 1501 and memory 1502.
The memory 1502 may include one or more computer-readable storage media, which may be non-transitory. The memory 1502 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in the memory 1502 is used to store at least one instruction for execution by the processor 1501 to implement the method for fuse determination in an automobile provided by the method embodiments herein.
In some embodiments, the terminal 1500 may further include: a peripheral interface 1503 and at least one peripheral. The processor 1501, memory 1502, and peripheral interface 1503 may be connected by buses or signal lines. Various peripheral devices may be connected to peripheral interface 1503 via buses, signal lines, or circuit boards. Specifically, the peripheral device includes: at least one of radio frequency circuitry 1504, touch screen display 1505, camera 1506, audio circuitry 1507, positioning assembly 1508, and power supply 1509.
The peripheral interface 1503 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 1501 and the memory 1502. In some embodiments, the processor 1501, memory 1502, and peripheral interface 1503 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 1501, the memory 1502, and the peripheral interface 1503 may be implemented on separate chips or circuit boards, which is not limited in this embodiment.
The Radio Frequency circuit 1504 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuitry 1504 communicates with communication networks and other communication devices via electromagnetic signals. The radio frequency circuit 1504 converts an electrical signal into an electromagnetic signal to transmit, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 1504 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuit 1504 can communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: metropolitan area networks, various generation mobile communication networks (2G, 3G, 4G, and 5G), Wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the radio frequency circuit 1504 may also include NFC (near field Communication) related circuits, which are not limited in this application.
The display screen 1505 is used to display a UI (user interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display screen 1505 is a touch display screen, the display screen 1505 also has the ability to capture touch signals on or over the surface of the display screen 1505. The touch signal may be input to the processor 1501 as a control signal for processing. In this case, the display screen 1505 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, display 1505 may be one, providing the front panel of terminal 1500; in other embodiments, display 1505 may be at least two, each disposed on a different surface of terminal 1500 or in a folded design; in still other embodiments, display 1505 may be a flexible display disposed on a curved surface or a folded surface of terminal 1500. Even further, the display 1505 may be configured in a non-rectangular irregular pattern, i.e., a shaped screen. The Display 1505 can be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and other materials.
The camera assembly 1506 is used to capture images or video. Optionally, the camera assembly 1506 includes a front camera and a rear camera. Generally, a front camera is disposed at a front panel of the terminal, and a rear camera is disposed at a rear surface of the terminal. In some embodiments, the number of the rear cameras is at least two, and each rear camera is any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize panoramic shooting and VR (Virtual Reality) shooting functions or other fusion shooting functions. In some embodiments, camera assembly 1506 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.
The audio circuitry 1507 may include a microphone and speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 1501 for processing or inputting the electric signals to the radio frequency circuit 1504 to realize voice communication. For stereo capture or noise reduction purposes, multiple microphones may be provided, each at a different location of the terminal 1500. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 1501 or the radio frequency circuit 1504 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, the audio circuitry 1507 may also include a headphone jack.
The positioning component 1508 is used to locate a current geographic position of the terminal 1500 to implement navigation or LBS (location based Service). The positioning component 1508 may be a positioning component based on the united states GPS (global positioning System), the chinese beidou System, the russian graves System, or the european union's galileo System.
In some embodiments, the terminal 1500 also includes one or more sensors 1510. The one or more sensors 1510 include, but are not limited to: acceleration sensor 1511, gyro sensor 1512, pressure sensor 1513, fingerprint sensor 1514, optical sensor 1515, and proximity sensor 1516.
The acceleration sensor 1511 may detect the magnitude of acceleration on three coordinate axes of the coordinate system established with the terminal 1500. For example, the acceleration sensor 1511 may be used to detect components of the gravitational acceleration in three coordinate axes. The processor 1501 may control the touch screen display 1505 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 1511. The acceleration sensor 1511 may also be used for acquisition of motion data of a game or a user.
The gyroscope sensor 1512 can detect the body direction and the rotation angle of the terminal 1500, and the gyroscope sensor 1512 and the acceleration sensor 1511 cooperate to collect the 3D motion of the user on the terminal 1500. The processor 1501 may implement the following functions according to the data collected by the gyro sensor 1512: motion sensing (such as changing the UI according to a user's tilting operation), image stabilization at the time of photographing, game control, and inertial navigation.
Pressure sensor 1513 may be disposed on a side bezel of terminal 1500 and/or underneath touch display 1505. When the pressure sensor 1513 is disposed on the side frame of the terminal 1500, the holding signal of the user to the terminal 1500 may be detected, and the processor 1501 performs left-right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 1513. When the pressure sensor 1513 is disposed at a lower layer of the touch display 1505, the processor 1501 controls the operability control on the UI interface according to the pressure operation of the user on the touch display 1505. The operability control comprises at least one of a button control, a scroll bar control, an icon control and a menu control.
The fingerprint sensor 1514 is configured to capture a fingerprint of the user, and the processor 1501 identifies the user based on the fingerprint captured by the fingerprint sensor 1514, or the fingerprint sensor 1514 identifies the user based on the captured fingerprint. Upon recognizing that the user's identity is a trusted identity, the processor 1501 authorizes the user to perform relevant sensitive operations including unlocking the screen, viewing encrypted information, downloading software, paying, and changing settings, etc. The fingerprint sensor 1514 may be disposed on the front, back, or side of the terminal 1500. When a physical key or vendor Logo is provided on the terminal 1500, the fingerprint sensor 1514 may be integrated with the physical key or vendor Logo.
The optical sensor 1515 is used to collect ambient light intensity. In one embodiment, processor 1501 may control the brightness of the display on touch screen 1505 based on the intensity of ambient light collected by optical sensor 1515. Specifically, when the ambient light intensity is high, the display brightness of the touch display screen 1505 is increased; when the ambient light intensity is low, the display brightness of the touch display screen 1505 is turned down. In another embodiment, the processor 1501 may also dynamically adjust the shooting parameters of the camera assembly 1506 based on the ambient light intensity collected by the optical sensor 1515.
A proximity sensor 1516, also known as a distance sensor, is typically provided on the front panel of the terminal 1500. The proximity sensor 1516 is used to collect the distance between the user and the front surface of the terminal 1500. In one embodiment, when the proximity sensor 1516 detects that the distance between the user and the front surface of the terminal 1500 gradually decreases, the processor 1501 controls the touch display 1505 to switch from the bright screen state to the dark screen state; when the proximity sensor 1516 detects that the distance between the user and the front surface of the terminal 1500 gradually becomes larger, the processor 1501 controls the touch display 1505 to switch from the breath screen state to the bright screen state.
That is, not only is an embodiment of the present invention provide a terminal including a processor and a memory for storing processor-executable instructions, wherein the processor is configured to execute the method in the embodiment shown in fig. 1 and 2, but also an embodiment of the present invention provides a computer-readable storage medium having a computer program stored therein, and the computer program can implement the method for determining the fuse of the automobile in the embodiment shown in fig. 1 and 2 when being executed by the processor.
Those skilled in the art will appreciate that the configuration shown in fig. 15 does not constitute a limitation of terminal 1500, and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components may be employed.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A method for fuse determination in an automotive vehicle, the method comprising:
acquiring load information of a wire harness loop of an automobile, and acquiring a current type of a load input into the wire harness loop of the automobile from the load information, wherein the load information is input into a terminal by a user through specified operation or acquired from other equipment when the terminal receives an information acquisition instruction;
determining an electrical characteristic of a load in the harness loop, determining a type of fuse protecting the harness loop based on the electrical characteristic; determining a capacity of a fuse capable of protecting the harness loop based on a current type input to the load; determining a fuse with the same capacity and the same type as the determined capacity as a fuse for protecting the wire harness loop based on the capacity of the fuse and the type of the fuse;
determining a wire specification of a wire connected to the fuse; determining a current characteristic curve of the wire based on the wire gauge and determining a current characteristic curve of the fuse; when the current of the wire is determined to be larger than the current of the fuse at each moment based on the current characteristic curve of the wire and the current characteristic curve of the fuse, determining that the fuse is selected to be qualified;
the different types of currents have different characteristics, and the obtaining of the type of current of the load input into the wire harness loop of the automobile from the load information includes:
determining the change condition of a current signal in the load information, and determining the type of current of a load input into a wire harness loop of the automobile as a steady-state current when a current value indicated by the current signal is not changed within a preset time period; when the current value changes from low to high and then from high to low in a preset time length and a stable current value which does not change all the time in the preset time length does not appear subsequently, determining that the current type is pulse current; when the current value changes from low to high and then from high to low and then appears at a stable current value which is not changed within a preset time period, determining that the current type is surge current;
the determining a capacity of a fuse capable of protecting the harness loop based on a type of current input to the load includes:
when the type of the current input to the load is pulse current, determining the accumulated current energy of the pulse current and the fusing energy of the fuse within a preset time length; dividing the accumulated current energy of the pulse current by the fusing energy of the fuse to obtain the maximum current energy for preventing the fuse from fusing;
and determining a plurality of pulse times corresponding to energy smaller than the maximum current energy from a stored fuse pulse cycle curve based on the maximum current energy for preventing the fuse from being fused, and determining any pulse time in the plurality of pulse times as the capacity of the fuse capable of protecting the wire harness loop.
2. The method of claim 1, wherein determining the capacity of a fuse capable of protecting the harness loop based on the current type of the load comprises:
when the type of the current input to the load is a steady-state current, acquiring the power of the load, the rated working voltage and the temperature value of the environment where the load is located;
dividing the power of the load by the rated working voltage to obtain a working current input to the load;
acquiring a temperature reduction coefficient value corresponding to the temperature value from a stored temperature reduction coefficient curve of the fuse;
determining a capacity of a fuse capable of protecting the harness loop based on the operating current of the load and the temperature reduction rate value.
3. The method of claim 1, wherein determining a current capacity of a fuse capable of protecting the harness loop based on a current type of the load comprises:
when the type of the current input to the load is surge current, current energy accumulated by the surge current and fusing energy of a fuse are determined within a preset time period;
dividing the current energy accumulated by the surge current by the fusing energy of the fuse to obtain the maximum current energy for preventing the fuse from fusing;
and determining the capacity of the fuse capable of protecting the wire harness loop according to the maximum current energy for preventing the fuse from being fused.
4. An apparatus for determining a fuse of a vehicle, the apparatus comprising:
the system comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring load information of a wire harness loop of an automobile and acquiring a current type of a load input into the wire harness loop of the automobile from the load information, and the load information is input into a terminal by a user through specified operation or acquired from other equipment when the terminal receives an information acquisition instruction;
a third determination module for determining an electrical characteristic of a load in the wire harness loop;
a fourth determination module for determining a type of fuse protecting the harness loop based on the electrical characteristic;
a first determination module for determining a capacity of a fuse capable of protecting the harness loop based on a type of current input to the load;
the second determining module is used for determining the fuse with the same capacity and the same type as the determined capacity as the fuse for protecting the wire harness loop based on the capacity of the fuse and the type of the fuse;
the apparatus also includes means for:
determining a wire specification of a wire connected to the fuse; determining a current characteristic curve of the wire based on the wire gauge and determining a current characteristic curve of the fuse; when the current of the wire is determined to be larger than the current of the fuse at each moment based on the current characteristic curve of the wire and the current characteristic curve of the fuse, determining that the fuse is selected to be qualified;
different types of current have different characteristics, the acquisition module being configured to:
determining the change condition of a current signal in the load information, and determining the type of current of a load input into a wire harness loop of the automobile as a steady-state current when a current value indicated by the current signal is not changed within a preset time period; when the current value changes from low to high and then from high to low in a preset time length and a stable current value which does not change all the time in the preset time length does not appear subsequently, determining that the current type is pulse current; when the current value changes from low to high and then from high to low and then appears at a stable current value which is not changed within a preset time period, determining that the current type is surge current;
the first determining module is configured to:
when the type of the current input to the load is pulse current, determining the accumulated current energy of the pulse current and the fusing energy of the fuse within a preset time length; dividing the accumulated current energy of the pulse current by the fusing energy of the fuse to obtain the maximum current energy for preventing the fuse from fusing;
and determining a plurality of pulse times corresponding to energy smaller than the maximum current energy from a stored fuse pulse cycle curve based on the maximum current energy for preventing the fuse from being fused, and determining any pulse time in the plurality of pulse times as the capacity of the fuse capable of protecting the wire harness loop.
5. The apparatus of claim 4, wherein the first determining module comprises:
the first obtaining submodule is used for obtaining the power of the load, the rated working voltage and the temperature value of the environment where the load is located when the type of the current input to the load is a steady-state current;
the first calculation submodule is used for dividing the power of the load by the rated working voltage to obtain the working current input to the load;
the second obtaining submodule is used for obtaining a temperature reduction rate value corresponding to the temperature value from a stored temperature reduction coefficient curve of the fuse;
a first determination submodule for determining a capacity of a fuse capable of protecting the harness loop based on the operating current of the load and the temperature reduction rate value.
6. A computer-readable storage medium, characterized in that the storage medium has stored therein a computer program which, when being executed by a processor, carries out the method of any one of claims 1-3.
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| CN113325251B (en) * | 2021-05-11 | 2022-06-24 | 一汽奔腾轿车有限公司 | Method and system for testing matching degree of fuse and wire for automobile wire harness |
| CN113065197B (en) * | 2021-05-27 | 2023-05-12 | 一汽奔腾轿车有限公司 | Design method of visual harness distribution model |
| CN113283087A (en) * | 2021-05-28 | 2021-08-20 | 一汽奔腾轿车有限公司 | Automobile wire harness main fuse capacity design method based on scene analysis |
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