CN112069747A - Method and device for establishing electrical performance of reliable wire harness system - Google Patents
Method and device for establishing electrical performance of reliable wire harness system Download PDFInfo
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Abstract
The invention relates to a method and a device for establishing electrical performance of a reliable wire harness system, wherein the method comprises the steps of establishing a wire harness system model, calculating various performance parameter values, judging whether the performance parameter values meet standard values or not and outputting a parameter correction report to complete the simulation calculation work of the electrical performance of the wire harness system, comparing and reasonably predicting the parameter values meeting the corresponding circuit model and the standard according to the model selection of a central system in the parameter correction report and the model selection of the system modified according to the standard, and is beneficial to reasonably evaluating the model selection of the system by technicians in the field so as to achieve the purpose of reducing the research and development period and the research and development cost.
Description
Technical Field
The invention relates to a method and a device for establishing electrical performance of a reliable wire harness system.
Background
The automobile wire harness is a network main body of an automobile circuit, and is used for transmitting signals to realize functions through reasonable design arrangement and connection of a power supply and electrical equipment such as various controllers, actuators and displays. If a certain functional loop breaks down, the corresponding electrical appliance function is disabled, and the automobile wiring harness is one of the key systems of the automobile. The electric wire is a carrier for transmitting electric signals and current, and the type selection of the conducting wire relates to the normal operation and safety of vehicle electric devices.
Along with the improvement of the requirements of people on the performance of the automobile, the automobile wire harness becomes more and more complex, the wire is reasonably and reliably selected, the comprehensive cost of the wire harness can be effectively saved, the overall quality of the wire harness is reduced, and the safe operation of the functions of the automobile is ensured.
At present, a set of reliable wire harness system electrical performance verification method does not exist, the wire harness system electrical performance can not be guaranteed to meet the standard requirement before a wire harness design verification test is completed, reasonable evaluation can not be made according to the current design state, and accordingly redundancy or insufficient safety margin exists in wire harness design.
For the technical problem, a reliable method for verifying the electrical performance of the wire harness system does not exist at present, so that a method and a device for establishing the electrical performance of the reliable wire harness system, which can reasonably evaluate the type selection of the current system, are needed to be provided.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a method and an apparatus for establishing electrical performance of a reliable wire harness system, which are capable of reasonably evaluating model selection of an original system through a numerical value of a calculation result and reasonably predicting a parameter value that meets a corresponding circuit model and a corresponding standard, thereby facilitating a technician in the field to reasonably evaluate model selection of the system, and achieving the purpose of reducing a research and development period and a research and development cost.
In order to solve the above problems, the present invention provides a method for establishing electrical performance of a reliable wire harness system, comprising the steps of:
s1, obtaining preset fuse type selection, preset lead type selection, auxiliary judgment parameter group, circuit model, preset standard parameter group and adjustment parameter type, wherein the auxiliary judgment parameter group at least comprises load working current IaLoad operating state and ground current IgThe adjusting parameter types comprise a first type and a second type, and the preset standard parameter group comprises a preset load anode reference voltage VPAnd a preset load negative reference voltage VNThe load working state comprises a short circuit state and an overload state;
s2, obtaining a preset fuse parameter group and a preset lead parameter group according to the preset fuse model selection and the preset lead model selection, wherein the preset fuse parameter group at least comprises a fuse allowable current IrefThe preset lead parameter group comprises a wire diameter parameter and a lead allowable temperature rise Tspec；
S3, obtaining a load pulse current I according to the auxiliary judgment parameter group, the circuit model and the line diameter parameterbTime of peak tbTemperature rise T of leadcLoad positive impedance RPAnd load negative impedance RN；
S4, judging the working current I of the load when the first type exists in the acquired adjustment parameter typesaFuse allowable current IrefLoad pulse current IbTime of peak tbTemperature rise T of leadcAnd allowable temperature rise T of leadspecWhether the first preset condition is met or not is judged, if not, the fuse type selection or the lead type selection is adjusted and the step S2 is skipped back, and the next step is skipped until the first preset condition is met;
s5, when the acquired adjustment parameter types have a second type, judging the load anode impedance RPThe load operating current IaThe load negative pole impedance RNThe grounding current IgThe preset load anode reference voltage VPThe preset load negative electrode reference voltage VNWhether a second preset condition is met or not, if not, adjusting the lead selection and jumping back to the step S2, and jumping to the next step until the second preset condition is met;
and S6, outputting a parameter correction report according to the wire parameters, the wire model selection, the fuse parameters and the fuse model selection which meet preset conditions.
Further, when the acquired adjustment parameter types include a first type, the load working current I is judgedaFuse allowable current IrefLoad pulse current IbTime of peak tbTemperature rise T of leadcAnd allowable temperature rise T of leadspecIf the first preset condition is not met, adjusting the fuse type selection or the lead type selection and jumping back to the step S2, and jumping to the next step if the first preset condition is met, wherein the step S2 comprises the following steps:
s41, when the first type exists in the obtained adjustment parameter types, judging the working current I of the loadaThe fuse allows a current IrefWhether or not to satisfy Ia≤IrefIf not, adjusting the fuse type selection and jumping back to the step S2, and jumping to the next step if the conditions are met;
s42, judging the load pulse current IbTime of peak tbAnd fuse allowable current IrefWhether or not to satisfy Ib 2·tb≤Iref 2·tbIf not, adjusting the fuse type selection and jumping back to the step S2, and jumping to the next step until the conditions are met;
s43, judging the temperature rise T of the leadcAnd allowable temperature rise T of leadspecWhether or not T is satisfiedc≥TspecIf not, the conductor type selection is adjusted and the step is skipped back to step S2 until the condition is met.
Further, when the obtained adjustment parameter types include a second type, the load positive impedance R is judgedPThe load operating current IaThe load negative pole impedance RNThe grounding current IgThe preset load anode reference voltage VPThe preset load negative electrode reference voltage VNIf the second preset condition is not met, adjusting the lead to select the type and jumping back to the step S2 until the second preset condition is met, and jumping to the next step, wherein the method comprises the following steps:
s51, when the acquired adjustment parameter types have a second type, judging the negativePositive electrode resistance RPThe load operating current IaAnd the preset load anode reference voltage VPWhether or not to satisfy Ia·RP≤VPIf not, adjusting the lead selection and jumping back to the step S2, and jumping to the next step until the conditions are met;
s52, judging the load negative impedance and the grounding current IgAnd the preset load negative reference voltage VNWhether or not to satisfy Ig·RN≤VNIf not, the conductor type selection is adjusted and the step is skipped back to step S2 until the condition is met.
Further, the auxiliary judgment parameter group further includes a first transfer impedance coefficient a, a second transfer impedance coefficient ζ and a preset temperature Ta, and the load pulse current I is obtained according to the auxiliary judgment parameter group, the circuit model and the line diameter parameterbTime of peak tbTemperature rise T of leadcLoad positive impedance RPAnd load negative impedance RNThe method comprises the following steps:
s31, calculating to obtain load pulse current I according to the circuit modelbAnd peak time Tb；
S32, according to the load working state and the load working current IaA first transfer resistance coefficient A, a second transfer resistance coefficient zeta and a preset temperature TaAnd calculating to obtain the temperature rise T of the leadc；
S33, obtaining load anode impedance R according to the circuit model and the line diameter parameterPAnd load negative impedance RN。
Further, the load working current I is based on the load working stateaA first transfer resistance coefficient A, a second transfer resistance coefficient zeta and a preset temperature TaAnd calculating to obtain the temperature rise T of the leadcThe method comprises the following steps:
s321, obtaining fuse fusing time T according to the load working state and the load working currentc；
S322, according to the fuse fusing time TcLoad operating current IaA first transfer resistance coefficient A, a second transfer resistance coefficient zeta and a preset temperature TaAnd calculating to obtain the temperature rise T of the leadc。
Further, the time T according to the fusing of the fusecLoad operating current IaA first transfer resistance coefficient A, a second transfer resistance coefficient zeta and a preset temperature TaAnd calculating to obtain the temperature rise T of the leadcIn particular, by the formula Tc＝Ta+(A·Ia 2·(1-exp(-tcζ))) is calculated to obtain Tc。
Further, the preset temperature TaAt room temperature.
The invention also protects a device for establishing the electrical performance of the reliable wire harness system, which comprises:
a parameter obtaining module, configured to obtain a preset fuse type selection, a preset lead type selection, an auxiliary judgment parameter set, a circuit model, a preset standard parameter set, and an adjustment parameter type, where the auxiliary judgment parameter set at least includes a load working current IaLoad operating state and ground current IgThe adjusting parameter types comprise a first type and a second type, and the preset standard parameter group comprises a preset load anode reference voltage VPAnd a preset load negative reference voltage VNThe load working state comprises a short circuit state and an overload state;
a first parameter conversion module, configured to obtain a preset fuse parameter set and a preset lead parameter set according to the preset fuse type and the preset lead type, where the preset fuse parameter set at least includes a fuse allowable current IrefThe preset lead parameter group comprises a wire diameter parameter and a lead allowable temperature rise Tspec；
A second parameter conversion module for obtaining a load pulse current I according to the auxiliary judgment parameter set, the circuit model and the line diameter parameterbTime of peak tbTemperature rise T of leadcLoad positive impedance RPAnd load negative impedance RN；
A first judging module for judging whether the first signal is a first signal,the method is used for judging the working current I of the load when the first type exists in the acquired adjustment parameter typesaFuse allowable current IrefLoad pulse current IbTime of peak tbTemperature rise T of leadcAnd allowable temperature rise T of leadspecWhether a first preset condition is met or not;
a second judging module, configured to judge the load positive impedance R when the obtained adjustment parameter type has a second typePThe load operating current IaThe load negative pole impedance RNThe grounding current IgThe preset load anode reference voltage VPThe preset load negative electrode reference voltage VNWhether a second preset condition is met or not;
the adjusting module is used for adjusting the fuse type selection or the lead type selection when the preset condition is not met;
and the output module is used for outputting a parameter correction report according to the wire parameters, the wire model selection, the fuse parameters and the fuse model selection which meet preset conditions.
Further, the apparatus further comprises: the reliability wire harness system electrical performance establishing device is used for correcting a preset fuse model and a preset wire model according to model data and circuit models in the fuse model data storage unit and the wire model data storage unit so as to improve the electrical performance of the wire harness system and the circuit model.
Due to the technical scheme, the invention has the following beneficial effects:
1) according to the method and the device for establishing the electrical performance of the reliable wire harness system, the electrical performance of the wire harness system is improved by reasonably predicting the parameter values which accord with the corresponding circuit model and the corresponding standard through three steps of establishing a circuit model, calculating the parameter values of various performances, judging whether the parameter values accord with the standard or not and outputting a correction parameter report, so that the purposes of reducing the research and development period and the research and development cost are achieved;
2) hair brushBy inputting the model selection parameters, the circuit model and the related parameters, whether the design standard requirements are met can be quickly judged, and the modified numerical value result is obtained, so that the safety, reliability and reasonability of the wire harness system design are ensured, wherein the needed related parameters (such as R) are analyzed and judgedPAnd RNEqual parameters) are obtained by calculating the input circuit model, and the calculation result is more reasonable and reliable;
3) according to the method, the verification is carried out according to the actual circuit model and the verification requirements under different load working states, including the load working current of the load under the short-circuit state and the overload state, so that the analysis and verification result is more targeted, and the finally obtained model parameters are safer and more reliable;
4) the invention reasonably predicts the relevant parameters which accord with the circuit model and the standard thereof through the output parameter correction report, is beneficial to the technicians in the field to give the rationality analysis and evaluation of the current design according to the parameter correction report, and is beneficial to the technicians to quickly evaluate reducible experimental items, thereby achieving the purpose of reducing the research and development period and the research and development cost.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a flowchart of a method for establishing electrical performance of a reliability harness system according to an embodiment of the present invention.
Fig. 2 is a flowchart of step S4 provided by the embodiment of the present invention.
Fig. 3 is a flowchart of step S5 provided by the embodiment of the present invention.
Fig. 4 is a flowchart of step S3 provided by the embodiment of the present invention.
Fig. 5 is a flowchart of step S32 provided by the embodiment of the present invention.
Fig. 6 is a block diagram of a device for establishing electrical performance of a reliable wiring harness system according to an embodiment of the present invention.
Fig. 7 is a circuit model diagram provided in the embodiment of the present invention.
Wherein the reference numerals in the figures correspond to:
1-generator, 2-12V accumulator, 3-relay, 4-fuse A, 5-fuse B, 6-fuse C, 7-vehicle body connector.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
Example 1:
the embodiment provides a method for establishing electrical performance of a reliable wire harness system, as shown in fig. 1, including the following steps:
s1, obtaining preset fuse type selection, preset lead type selection, auxiliary judgment parameter group, circuit model, preset standard parameter group and adjustment parameter type, wherein the auxiliary judgment parameter group at least comprises load working current IaLoad operating state and ground current IgThe adjusting parameter types comprise a first type and a second type, and the preset standard parameter group comprises a preset load anode reference voltage VPAnd a preset load negative reference voltage VNThe load working state comprises a short circuit state and an overload state;
s2, obtaining a preset fuse parameter group and a preset lead parameter group according to the preset fuse model selection and the preset lead model selection, wherein the preset fuse parameter group at least comprises a fuse allowable current IrefThe preset lead parameter group comprises a wire diameter parameter and a lead allowable temperature rise Tspec；
S3, obtaining a load pulse current I according to the auxiliary judgment parameter group, the circuit model and the line diameter parameterbTime of peak tbTemperature rise T of leadcLoad positive impedance RPAnd load negative impedance RN；
S4, judging the working current I of the load when the first type exists in the acquired adjustment parameter typesaFuse allowable current IrefLoad pulse current IbTime of peak tbTemperature rise T of leadcAnd allowable temperature rise T of leadspecWhether the first preset condition is met or not is judged, if not, the fuse type selection or the lead type selection is adjusted and the step S2 is skipped back, and the next step is skipped until the first preset condition is met;
s5, when the acquired adjustment parameter types have a second type, judging the load anode impedance RPThe load operating current IaThe load negative pole impedance RNThe grounding current IgThe preset load anode reference voltage VPThe preset load negative electrode reference voltage VNWhether a second preset condition is met or not, if not, adjusting the lead selection and jumping back to the step S2, and jumping to the next step until the second preset condition is met;
and S6, outputting a parameter correction report according to the wire parameters, the wire model selection, the fuse parameters and the fuse model selection which meet preset conditions.
The method completes the simulation calculation work of the electrical performance of the wire harness system by three steps of building a wire harness system model, calculating each performance parameter value, judging whether the result accords with a standard value or not and outputting a parameter correction report, and is beneficial to reasonably evaluating the system selection by technicians in the field according to the comparison of the original system selection in the parameter correction report and the system selection modified according to the standard, thereby replacing partial experimental items and achieving the purposes of shortening the test period and reducing the test cost.
Further, as shown in fig. 2, when the obtained adjustment parameter types include a first type, the load working current I is determinedaFuse allowable current IrefLoad pulse current IbTime of peak tbTemperature rise T of leadcAnd allowable temperature rise T of leadspecIf the first preset condition is not met, adjusting the fuse type selection or the lead type selection and jumping back to the step S2, and jumping to the next step if the first preset condition is met, wherein the step S2 comprises the following steps:
s41, when the first type exists in the obtained adjustment parameter types, judging the working current I of the loadaThe fuse allows a current IrefWhether or not to satisfy Ia≤IrefIf not, adjusting the fuse type selection and jumping back to the step S2, and jumping to the next step if the conditions are met;
s42, judging the load pulse current IbTime of peak tbAnd fuse allowable current IrefWhether or not to satisfy Ib 2·tb≤Iref 2·tbIf not, then adjustThe fuse is selected and jumps back to the step S2, and the next step is jumped to until the condition is met;
s43, judging the temperature rise T of the leadcAnd allowable temperature rise T of leadspecWhether or not T is satisfiedc≥TspecIf not, the conductor type selection is adjusted and the step is skipped back to step S2 until the condition is met.
The method mainly comprises the steps of verifying the fuse model selection and the lead model selection in the wiring harness system design, and specifically, judging whether the allowable current parameter and the allowable impact current parameter in the current fuse model selection and the temperature rise change in the current lead parameter meet the standard or not.
Further, as shown in fig. 3, when the obtained adjustment parameter type has a second type, it is determined that the load positive impedance R is presentPThe load operating current IaThe load negative pole impedance RNThe grounding current IgThe preset load anode reference voltage VPThe preset load negative electrode reference voltage VNIf the second preset condition is not met, adjusting the lead to select the type and jumping back to the step S2 until the second preset condition is met, and jumping to the next step, wherein the method comprises the following steps:
s51, when the acquired adjustment parameter types have a second type, judging the load anode impedance RPThe load operating current IaAnd the preset load anode reference voltage VPWhether or not to satisfy Ia·RP≤VPIf not, adjusting the lead selection and jumping back to the step S2, and jumping to the next step until the conditions are met;
s52, judging the load negative impedance and the grounding current IgAnd the preset load negative reference voltage VNWhether or not to satisfy Ig·RN≤VNIf not, the conductor type selection is adjusted and the step is skipped back to step S2 until the condition is met.
The steps are used for verifying whether the impedance parameter of the wire harness is within the range required by the system design so as to ensure that the load is in the worst working conditionThe electrical performance does not decay or lose during operation. Wherein, the reference voltage V of the anode of the preset load in the preset standard parameter groupPAnd a preset load negative reference voltage VNIs preset by the skilled person according to experience and standards. The skilled person in the art selects different types of input adjustment parameters according to different requirements for parameter type prediction, and the types of input adjustment parameters are respectively: the first type, the second type, the first type and the second type.
Further, as shown in fig. 4, the auxiliary judgment parameter set further includes a first transfer impedance coefficient a, a second transfer impedance coefficient ζ, and a preset temperature Ta, and the load pulse current I is obtained according to the auxiliary judgment parameter set, the circuit model, and the line diameter parameterbTime of peak tbTemperature rise T of leadcLoad positive impedance RPAnd load negative impedance RNThe method comprises the following steps:
s31, calculating to obtain load pulse current I according to the circuit modelbAnd peak time Tb；
S32, according to the load working state and the load working current IaA first transfer resistance coefficient A, a second transfer resistance coefficient zeta and a preset temperature TaAnd calculating to obtain the temperature rise T of the leadc；
S33, obtaining load anode impedance R according to the circuit model and the line diameter parameterPAnd load negative impedance RN。
And calculating to obtain parameter values of various properties according to the obtained wire harness system model and corresponding parameters in the model. Wherein a pulse current I is loadedbThe maximum value of the impact current flowing on the load at the moment of closing the circuit and the peak time TbThe time it takes for the rush current to rise from zero to a maximum value. The first impedance transfer coefficient A and the second impedance transfer coefficient zeta are preset parameters, and the specific parameters are set by searching for relevant standards. Calculating the system to be calculated according to the wire type selection, fuse type selection, terminal type selection, relay type selection and grounding point arrangement in the current wiring harness system designThe total impedance of the system comprises a load positive pole impedance RPAnd load negative impedance RN. According to the invention, through inputting the model selection parameters, the circuit model and the related parameters, whether the design standard requirements are met can be quickly judged, and the modified numerical value result is obtained, so that the safety, reliability and reasonability of the design of the wiring harness system are ensured, wherein the related parameters required by analysis and judgment can be calculated according to the input circuit model, the labor cost is reduced, and meanwhile, the calculation result is more reasonable and more reliable.
Further, as shown in fig. 5, the load operation current I is according to the load operation stateaA first transfer resistance coefficient A, a second transfer resistance coefficient zeta and a preset temperature TaAnd calculating to obtain the temperature rise T of the leadcThe method comprises the following steps:
s321, obtaining fuse fusing time T according to the load working state and the load working currentc；
S322, according to the fuse fusing time TcLoad operating current IaA first transfer resistance coefficient A, a second transfer resistance coefficient zeta and a preset temperature TaAnd calculating to obtain the temperature rise T of the leadc。
The method comprises the steps that load working states comprise a short-circuit state and an overload state, when the load working states are short-circuit states, the obtained load working current is the load working current in the short-circuit state, and fuse fusing time corresponding to the load working current in the short-circuit state is obtained according to the load working current in the short-circuit state and the load working current in the short-circuit state; and when the load working state is an overload state, acquiring the load working current which is obtained under the overload state, and obtaining the fuse fusing time corresponding to the load working current under the overload state according to the short-circuit state and the load working current under the short-circuit state. According to the invention, the verification is carried out according to the actual circuit model and the verification requirements under different load working states, including the load working current of the load under the short-circuit state and the overload state, so that the analysis and verification result is more targeted, and the finally obtained model parameters are safer and more reliable.
Further, the time T according to the fusing of the fusecLoad operating current IaA first transfer resistance coefficient A, a second transfer resistance coefficient zeta and a preset temperature TaAnd calculating to obtain the temperature rise T of the leadcIn particular, by the formula Tc＝Ta+(A·Ia 2·(1-exp(-tcζ))) is calculated to obtain Tc. The preset temperature TaAt room temperature. And calculating to obtain the temperature rise of the lead, comparing the temperature rise of the lead with the allowable temperature rise of the lead in the lead parameters, if the temperature rise of the lead is greater than the allowable temperature rise of the lead, the model parameter of the lead cannot meet the current circuit model design, adjusting the allowable temperature rise of the lead in the lead parameters, replacing the allowable temperature rise of the lead with other corresponding lead models of different allowable temperature rise parameters of the lead, and returning to the step S2 for judging again.
In this embodiment, the adjustment parameter types are the first type and the second type, and therefore, corresponding comparison and judgment of the electrical parameters need to be performed according to the methods in step S4 and step S5, which specifically includes the following steps:
s1, obtaining preset fuse type selection, preset lead type selection, auxiliary judgment parameter group, circuit model, preset standard parameter group and adjustment parameter type, wherein the auxiliary judgment parameter group at least comprises load working current IaLoad operating state and ground current IgThe adjusting parameter types comprise a first type and a second type, and the preset standard parameter group comprises a preset load anode reference voltage VPAnd a preset load negative reference voltage VNThe load working state comprises a short circuit state and an overload state;
s2, obtaining a preset fuse parameter group and a preset lead parameter group according to the preset fuse model selection and the preset lead model selection, wherein the preset fuse parameter group at least comprises a fuse allowable current IrefThe preset lead parameter group comprises a wire diameter parameter and a lead allowable temperature rise Tspec；
S3, obtaining a load pulse current I according to the auxiliary judgment parameter group, the circuit model and the line diameter parameterbTime of peak tbTemperature rise T of leadcLoad positive impedance RPAnd load negative impedance RN；
S4, judging the working current I of the loadaFuse allowable current IrefLoad pulse current IbTime of peak tbTemperature rise T of leadcAnd allowable temperature rise T of leadspecWhether the first preset condition is met or not is judged, if not, the fuse type selection or the lead type selection is adjusted and the step S2 is skipped back, and the next step is skipped until the first preset condition is met;
s5, judging the load anode impedance RPThe load operating current IaThe load negative pole impedance RNThe grounding current IgThe preset load anode reference voltage VPThe preset load negative electrode reference voltage VNWhether a second preset condition is met or not, if not, adjusting the lead selection and jumping back to the step S2, and jumping to the next step until the second preset condition is met;
and S6, outputting a parameter correction report according to the wire parameters, the wire model selection, the fuse parameters and the fuse model selection which meet preset conditions.
The present embodiment further provides a device for establishing electrical performance of a reliable wire harness system, as shown in fig. 6, including:
a parameter obtaining module 10, configured to obtain a preset fuse type selection, a preset lead type selection, an auxiliary judgment parameter set, a circuit model, a preset standard parameter set, and an adjustment parameter type, where the auxiliary judgment parameter set at least includes a load working current IaLoad operating state and ground current IgThe adjusting parameter types comprise a first type and a second type, and the preset standard parameter group comprises a preset load anode reference voltage VPAnd a preset load negative reference voltage VNThe load working state comprises a short circuit state and an overload state;
a first parameter conversion module 20, configured to obtain a preset fuse parameter set and a preset lead according to the preset fuse model and the preset lead modelA set of lead parameters, the set of preset fuse parameters at least including a fuse allowable current IrefThe preset lead parameter group comprises a wire diameter parameter and a lead allowable temperature rise Tspec；
A second parameter conversion module 30, configured to obtain a load pulse current I according to the auxiliary judgment parameter set, the circuit model, and the line diameter parameterbTime of peak tbTemperature rise T of leadcLoad positive impedance RPAnd load negative impedance RN；
A first determining module 40, configured to determine a load working current I when the obtained adjustment parameter types include a first typeaFuse allowable current IrefLoad pulse current IbTime of peak tbTemperature rise T of leadcAnd allowable temperature rise T of leadspecWhether a first preset condition is met or not;
a second determining module 50, configured to determine the load positive impedance R when the obtained adjustment parameter type has a second typePThe load operating current IaThe load negative pole impedance RNThe grounding current IgThe preset load anode reference voltage VPThe preset load negative electrode reference voltage VNWhether a second preset condition is met or not;
the adjusting module 60 is used for adjusting the fuse type selection or the lead type selection when the preset condition is not met;
and the output module 70 outputs a parameter correction report according to the wire parameters, the wire model selection, the fuse parameters and the fuse model selection which meet preset conditions.
Further, the reliability harness system electrical performance establishing device further comprises: the reliability wire harness system electrical performance establishing device is used for correcting a preset fuse model and a preset wire model according to model data and circuit models in the fuse model data storage unit and the wire model data storage unit so as to improve the electrical performance of the wire harness system and the circuit model.
The present embodiment also provides a storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, causes the processor to execute the steps of the above-mentioned reliability harness system electrical performance establishing method.
The embodiment also provides a computer device, which comprises a memory and a processor, wherein the memory stores a computer program, and the computer program is executed by the processor, so that the processor executes the steps of the reliability wiring harness system electrical performance establishing method.
Example 2:
the difference between the present embodiment and the present embodiment is that the preset adjustment parameter types are different. In this embodiment, the preset adjustment parameter type is a first type, and the corresponding method specifically includes:
s1, obtaining preset fuse type selection, preset lead type selection, auxiliary judgment parameter group, circuit model, preset standard parameter group and adjustment parameter type, wherein the auxiliary judgment parameter group at least comprises load working current IaLoad operating state and ground current IgThe adjusting parameter types comprise a first type and a second type, and the preset standard parameter group comprises a preset load anode reference voltage VPAnd a preset load negative reference voltage VNThe load working state comprises a short circuit state and an overload state;
s2, obtaining a preset fuse parameter group and a preset lead parameter group according to the preset fuse model selection and the preset lead model selection, wherein the preset fuse parameter group at least comprises a fuse allowable current IrefThe preset lead parameter group comprises a wire diameter parameter and a lead allowable temperature rise Tspec；
S3, obtaining a load pulse current I according to the auxiliary judgment parameter group, the circuit model and the line diameter parameterbTime of peak tbTemperature rise T of leadcLoad positive impedance RPAnd load negative impedance RN；
S4, judging the working current I of the loadaFuse allowable current IrefLoad pulse current IbTime of peak tbTemperature rise T of leadcAnd allowable temperature rise T of leadspecWhether the first preset condition is met or not is judged, if not, the fuse type selection or the lead type selection is adjusted and the step S2 is skipped back, and the next step is skipped until the first preset condition is met;
and S6, outputting a parameter correction report according to the wire parameters, the wire model selection, the fuse parameters and the fuse model selection which meet preset conditions.
Example 3:
the present embodiment is different from the above embodiments in that the preset adjustment parameter types are different. In this embodiment, the preset adjustment parameter type is a second type, and the corresponding method specifically includes:
s1, obtaining preset fuse type selection, preset lead type selection, auxiliary judgment parameter group, circuit model, preset standard parameter group and adjustment parameter type, wherein the auxiliary judgment parameter group at least comprises load working current IaLoad operating state and ground current IgThe adjusting parameter types comprise a first type and a second type, and the preset standard parameter group comprises a preset load anode reference voltage VPAnd a preset load negative reference voltage VNThe load working state comprises a short circuit state and an overload state;
s2, obtaining a preset fuse parameter group and a preset lead parameter group according to the preset fuse model selection and the preset lead model selection, wherein the preset fuse parameter group at least comprises a fuse allowable current IrefThe preset lead parameter group comprises a wire diameter parameter and a lead allowable temperature rise Tspec；
S3, obtaining a load pulse current I according to the auxiliary judgment parameter group, the circuit model and the line diameter parameterbTime of peak tbTemperature rise T of leadcLoad positive impedance RPAnd load negative impedance RN；
S5, judgingBreaking the load positive impedance RPThe load operating current IaThe load negative pole impedance RNThe grounding current IgThe preset load anode reference voltage VPThe preset load negative electrode reference voltage VNWhether a second preset condition is met or not, if not, adjusting the lead selection and jumping back to the step S2, and jumping to the next step until the second preset condition is met;
and S6, outputting a parameter correction report according to the wire parameters, the wire model selection, the fuse parameters and the fuse model selection which meet preset conditions.
Example 4:
fig. 7 is a diagram of a specific circuit model required to perform analysis calculation. As shown in fig. 7, the generator and the 12V battery are used as power modules, which include relays and fuse elements, and are connected to a load through a harness wire. In fig. 7, there are three parallel lines A, B, C, where each line has a fuse a, a wire a, a fuse B, a wire B, a fuse C, and a wire C, and model parameters of the fuse a, the wire a, the fuse B, the wire B, the fuse C, and the wire C need to be calculated, determined, and analyzed. For the circuit, three circuit models are required to be built for calculation according to the line A, the line B and the line C, namely the three circuit models are required to be calculated according to the method of the invention respectively, and three times of analysis and calculation are required in total.
According to the circuit model, the corresponding load impedance, load pulse current and peak time on the three lines are respectively calculated, wherein the load impedance comprises: rAP、RAN、RBP、RBN、RCP、RCN. Then, the designed fuse model, lead model and load working current I are inputaLoad operating state, ground current IgAdjusting parameter type and presetting load anode reference voltage VPAnd a preset load negative reference voltage VN. According to the parameters, whether the allowable current parameter, the allowable impact current parameter, the allowable temperature rise of the lead, the positive voltage loss and the negative voltage loss in the fuse selection meet the standard values or not is sequentially judged, and the corresponding parameters are carried out under the condition that the allowable current parameter, the allowable impact current parameter, the allowable temperature rise of the lead, the positive voltage loss and the negative voltage loss do not meet the standard valuesAnd (4) correcting, namely circulating, verifying and correcting the fuse and wire model parameters through the steps, and finally exporting the result in a report form for a technician to analyze.
The embodiment provided by the invention has the following beneficial effects:
1) according to the method and the device for establishing the electrical performance of the reliable wire harness system, the electrical performance of the wire harness system is improved by reasonably predicting the parameter values which accord with the corresponding circuit model and the corresponding standard through three steps of establishing a circuit model, calculating the parameter values of various performances, judging whether the parameter values accord with the standard or not and outputting a correction parameter report, so that the purposes of reducing the research and development period and the research and development cost are achieved;
2) the invention can quickly judge whether the design standard requirement is met or not by inputting the model selection parameter, the circuit model and the related parameters, and obtain the modified numerical value result, thereby ensuring the safety, reliability and reasonability of the wire harness system design, wherein the related parameters (such as R) required by analysis and judgment are analyzed and judgedPAnd RNEqual parameters) are obtained by calculating the input circuit model, and the calculation result is more reasonable and reliable;
3) according to the method, the verification is carried out according to the actual circuit model and the verification requirements under different load working states, including the load working current of the load under the short-circuit state and the overload state, so that the analysis and verification result is more targeted, and the finally obtained model parameters are safer and more reliable;
4) the invention reasonably predicts the relevant parameters which accord with the circuit model and the standard thereof through the output parameter correction report, is beneficial to the technicians in the field to give the rationality analysis and evaluation of the current design according to the parameter correction report, and is beneficial to the technicians to quickly evaluate reducible experimental items, thereby achieving the purpose of reducing the research and development period and the research and development cost.
It is noted that while for simplicity of explanation, the foregoing method embodiments have been presented as a series of interrelated states or acts, it should be appreciated by those skilled in the art that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Similarly, the modules of the above-mentioned reliability harness system electrical performance establishing device refer to computer programs or program segments for performing one or more specific functions, and the distinction between the modules does not represent actual program codes and must be separate. Further, the above embodiments may be arbitrarily combined to obtain other embodiments.
In the foregoing embodiments, the descriptions of the embodiments have respective emphasis, and reference may be made to related descriptions of other embodiments for parts that are not described in detail in a certain embodiment. Those of skill in the art will further appreciate that the various illustrative logical blocks, units, and steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate the interchangeability of hardware and software, various illustrative components, elements, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present embodiments.
The foregoing description has disclosed fully preferred embodiments of the present invention. It should be noted that those skilled in the art can make modifications to the embodiments of the present invention without departing from the scope of the appended claims. Accordingly, the scope of the appended claims is not to be limited to the specific embodiments described above.
Claims (9)
1. A method for establishing electrical performance of a reliability harness system, the method comprising:
s1, obtaining preset fuse type selection, preset lead type selection, auxiliary judgment parameter group, circuit model, preset standard parameter group and adjustment parameter type, wherein the auxiliary judgment parameter group at least comprises load working current IaLoad operating condition and groundCurrent IgThe adjusting parameter types comprise a first type and a second type, and the preset standard parameter group comprises a preset load anode reference voltage VPAnd a preset load negative reference voltage VNThe load working state comprises a short circuit state and an overload state;
s2, obtaining a preset fuse parameter group and a preset lead parameter group according to the preset fuse model selection and the preset lead model selection, wherein the preset fuse parameter group at least comprises a fuse allowable current IrefThe preset lead parameter group comprises a wire diameter parameter and a lead allowable temperature rise Tspec；
S3, obtaining a load pulse current I according to the auxiliary judgment parameter group, the circuit model and the line diameter parameterbTime of peak tbTemperature rise T of leadcLoad positive impedance RPAnd load negative impedance RN；
S4, judging the working current I of the load when the first type exists in the acquired adjustment parameter typesaFuse allowable current IrefLoad pulse current IbTime of peak tbTemperature rise T of leadcAnd allowable temperature rise T of leadspecWhether the first preset condition is met or not is judged, if not, the fuse type selection or the lead type selection is adjusted and the step S2 is skipped back, and the next step is skipped until the first preset condition is met;
s5, when the acquired adjustment parameter types have a second type, judging the load anode impedance RPThe load operating current IaThe load negative pole impedance RNThe grounding current IgThe preset load anode reference voltage VPThe preset load negative electrode reference voltage VNWhether a second preset condition is met or not, if not, adjusting the lead selection and jumping back to the step S2, and jumping to the next step until the second preset condition is met;
and S6, outputting a parameter correction report according to the wire parameters, the wire model selection, the fuse parameters and the fuse model selection which meet preset conditions.
2. The method according to claim 1, wherein when the obtained adjustment parameter types include a first type, the method determines a load working current IaFuse allowable current IrefLoad pulse current IbTime of peak tbTemperature rise T of leadcAnd allowable temperature rise T of leadspecIf the first preset condition is not met, adjusting the fuse type selection or the lead type selection and jumping back to the step S2, and jumping to the next step if the first preset condition is met, wherein the step S2 comprises the following steps:
s41, when the first type exists in the obtained adjustment parameter types, judging the working current I of the loadaThe fuse allows a current IrefWhether or not to satisfy Ia≤IrefIf not, adjusting the fuse type selection and jumping back to the step S2, and jumping to the next step if the conditions are met;
s42, judging the load pulse current IbTime of peak tbAnd fuse allowable current IrefWhether or not to satisfy Ib 2·tb≤Iref 2·tbIf not, adjusting the fuse type selection and jumping back to the step S2, and jumping to the next step until the conditions are met;
s43, judging the temperature rise T of the leadcAnd allowable temperature rise T of leadspecWhether or not T is satisfiedc≥TspecIf not, the conductor type selection is adjusted and the step is skipped back to step S2 until the condition is met.
3. The method according to claim 1, wherein when the obtained adjustment parameter type has a second type, the method determines the load positive impedance RPThe load operating current IaThe load negative pole impedance RNThe grounding current IgThe preset load anode reference voltage VPThe preset load negative electrode reference voltage VNIf the second preset condition is not met, adjusting the lead to select the type and jumping back to the step S2 until the second preset condition is met, and jumping to the next step, wherein the method comprises the following steps:
s51, when the acquired adjustment parameter types have a second type, judging the load anode impedance RPThe load operating current IaAnd the preset load anode reference voltage VPWhether or not to satisfy Ia·RP≤VPIf not, adjusting the lead selection and jumping back to the step S2, and jumping to the next step until the conditions are met;
s52, judging the load negative impedance and the grounding current IgAnd the preset load negative reference voltage VNWhether or not to satisfy Ig·RN≤VNIf not, the conductor type selection is adjusted and the step is skipped back to step S2 until the condition is met.
4. The method of claim 1, wherein the set of auxiliary judgment parameters further comprises a first transition resistance coefficient A, a second transition resistance coefficient ζ and a preset temperature Ta,
obtaining a load pulse current I according to the auxiliary judgment parameter group, the circuit model and the line diameter parameterbTime of peak tbTemperature rise T of leadcLoad positive impedance RPAnd load negative impedance RNThe method comprises the following steps:
s31, calculating to obtain load pulse current I according to the circuit modelbAnd peak time Tb；
S32, according to the load working state and the load working current IaA first transfer resistance coefficient A, a second transfer resistance coefficient zeta and a preset temperature TaAnd calculating to obtain the temperature rise T of the leadc；
S33, obtaining load anode impedance R according to the circuit model and the line diameter parameterPAnd load negative impedance RN。
5. According to claimThe method for establishing electrical performance of a reliable wire harness system according to claim 4, wherein the load operating current I is based on the load operating stateaA first transfer resistance coefficient A, a second transfer resistance coefficient zeta and a preset temperature TaAnd calculating to obtain the temperature rise T of the leadcThe method comprises the following steps:
s321, obtaining fuse fusing time T according to the load working state and the load working currentc；
S322, according to the fuse fusing time TcLoad operating current IaA first transfer resistance coefficient A, a second transfer resistance coefficient zeta and a preset temperature TaAnd calculating to obtain the temperature rise T of the leadc。
6. The method of claim 5, wherein said fuse blow time T is based on a reliability of said harness system electrical performancecLoad operating current IaA first transfer resistance coefficient A, a second transfer resistance coefficient zeta and a preset temperature TaAnd calculating to obtain the temperature rise T of the leadcIn particular, by the formula Tc＝Ta+(A·Ia 2·(1-exp(-tcζ))) is calculated to obtain Tc。
7. The method of claim 6, wherein the predetermined temperature T is set to be equal to the predetermined temperature TaAt room temperature.
8. A reliable harness system electrical performance establishing apparatus, the apparatus comprising:
a parameter obtaining module, configured to obtain a preset fuse type selection, a preset lead type selection, an auxiliary judgment parameter set, a circuit model, a preset standard parameter set, and an adjustment parameter type, where the auxiliary judgment parameter set at least includes a load working current IaLoad operating state and ground current IgWherein the adjusting parameter types comprise a first type and a second type, and preset marksThe reference parameter set comprises a preset load anode reference voltage VPAnd a preset load negative reference voltage VNThe load working state comprises a short circuit state and an overload state;
a first parameter conversion module, configured to obtain a preset fuse parameter set and a preset lead parameter set according to the preset fuse type and the preset lead type, where the preset fuse parameter set at least includes a fuse allowable current IrefThe preset lead parameter group comprises a wire diameter parameter and a lead allowable temperature rise Tspec；
A second parameter conversion module for obtaining a load pulse current I according to the auxiliary judgment parameter set, the circuit model and the line diameter parameterbTime of peak tbTemperature rise T of leadcLoad positive impedance RPAnd load negative impedance RN；
A first judging module, configured to judge a load working current I when the obtained adjustment parameter type includes a first typeaFuse allowable current IrefLoad pulse current IbTime of peak tbTemperature rise T of leadcAnd allowable temperature rise T of leadspecWhether a first preset condition is met or not;
a second judging module, configured to judge the load positive impedance R when the obtained adjustment parameter type has a second typePThe load operating current IaThe load negative pole impedance RNThe grounding current IgThe preset load anode reference voltage VPThe preset load negative electrode reference voltage VNWhether a second preset condition is met or not;
the adjusting module is used for adjusting the fuse type selection or the lead type selection when the preset condition is not met;
and the output module is used for outputting a parameter correction report according to the wire parameters, the wire model selection, the fuse parameters and the fuse model selection which meet preset conditions.
9. The device according to claim 8, further comprising a fuse model data storage unit and a wire model data storage unit, wherein the device is configured to modify a preset fuse model and a preset wire model according to model data and a circuit model in the fuse model data storage unit and the wire model data storage unit, so as to improve electrical performance of the harness system and the circuit model.
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