CN103593544B - Automobile lead sectional area measuring method - Google Patents
Automobile lead sectional area measuring method Download PDFInfo
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- CN103593544B CN103593544B CN201210288761.2A CN201210288761A CN103593544B CN 103593544 B CN103593544 B CN 103593544B CN 201210288761 A CN201210288761 A CN 201210288761A CN 103593544 B CN103593544 B CN 103593544B
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Abstract
The invention relates to a method for measuring the optical sectional areas of an automobile lead, in particular to the automobile lead sectional area measuring method convenient and accurate in measurement. The automobile lead sectional area measuring method can accurately measure the optical lead sectional area corresponding to electric appliances in an automobile electric control system according to various input diameters. The automobile lead sectional area measuring method is characterized by comprising the steps of (a) calculating the estimated lead sectional area according to a lead sectional area computational formula: A= I* rho* L/ Ud; (b) calculating the largest estimated current borne by a lead according to a current formula: Imax= (10* A+ 8) / 2; (c) searching the matched largest standard current and standard lead sectional area according to the largest estimated current; (d) judging whether the largest estimated current meets a validation formula: Ib* alpha* beta＞ Imax, outputting the standard lead sectional area if the largest estimated current meets the validation formula, and returning to the step (c) if the largest estimated current does not meet the validation formula.
Description
Technical field
The present invention relates to a kind of method of the conductor cross-section area of measurement, more particularly, to a kind of measurement automobiles wire is
The measuring method of good area of section.
Background technology
At present, as the product of a modernization towards consumers in general, the exploitation of its in-car electric-control system becomes automobile
The importance developed for whole automotive system, and each vehicle electric certainly will be related in the development process of electric-control system
The selection of the corresponding sectional area of wire of sub- device.Because this automobile-used wire cross-section area selects to depend on a lot of aspects, for example：Lead
Line length, electrical appliance rated power, supply voltage etc..So, each producer is all little for the selection mode of sectional area of wire
Identical, mainly rely on the experience of strand design personnel it is selected, be exactly a very big barrier so for new person
Hinder.Additionally, with being stepped up of vehicular electrical appliance in automobile, more likely increasing some new vehicular electrical appliances, such wire harness sets
Meter personnel just can only increased the design of car load to determine wire cross-section area by way of test, and the selection of wire
Subjective consciousness depending on people it is impossible to accurately and rapidly choose optimal wire it is not only possible to cause the waste of resource, when serious,
Improper due to selecting, it is likely to result in potential safety hazard.
Content of the invention
For deficiency of the prior art, the present invention is intended to provide a kind of measurement convenience, accurate automobiles wire cut
Planar survey method, the method can accurately measure, according to multiple |input parametes, the electrical appliance drawing in all kinds of in-car electric-control systems
The corresponding optimal conductor cross-section area of part.
In order to solve the above problems, a kind of automobile lead sectional area measuring method of the present invention is it is characterised in that include
Step：
（a）According to conductor cross-section computing formula A=I × ρ × L/UdCalculate and estimate conductor cross-section area；
（b）According to Current calculation formula ImaxWhat=(10 × A+8)/2 calculated that wire can bear estimates maximum current；
（c）Search the standard maximum electric current mating and gauge wire area of section according to estimating maximum current；
（d）Estimate described in judgement whether maximum current meets checking formula IB×α×β > Imax, if it is, will be described
Standard section area output, if it is not, then return to step（c）；
Wherein：In described conductor cross-section computing formula：
I=P/U I is current in wire, and P is vehicle-mounted appliance power, and U is supply voltage；ρ is conductor resistance rate, and L is to lead
Line length；
Ud=U1+U2UdFor allowing the loss of circuit maximum voltage, U1For the loss of circuit maximum voltage, U2For terminal maximum voltage
Loss；
In described checking formula：
The electric current reduction ratio that α brings for line set number；
The electric current reduction ratio that β brings for ambient temperature.
Preferably, described step（a）Before, also include described standard maximum electric current and the input of gauge wire area of section
Step in a searching modul；Described step（c）In, search coupling in this searching modul according to estimating maximum current
Standard maximum electric current and gauge wire area of section.Described searching modul is data base or data link table.
It is highly preferred that described step（d）In, described gauge wire area of section is exported to an output module.Described defeated
Going out module is display or printer.
The present invention passes through to execute above-mentioned a series of step, can accurately, fast and easily measure suitable various automobile
The conductor cross-section area of vehicular electrical appliance, thus selecting suitable wire cable, providing safety for vehicular electrical appliance and being efficiently electrically connected
Connect, eliminate manual measurement and speculate the step selecting cable by rule of thumb, and the wire cable selected meets optimized mark
Standard, saves integral vehicle cost.
Brief description
Fig. 1 is the flow chart of the automobile lead sectional area measuring method of the present invention；
Fig. 2 is the standard maximum electric current I of the present inventionBWith gauge wire area of section ABCorresponding form schematic diagram；
Fig. 3 is the computer software main interface sectional drawing of the automobile lead sectional area measuring method of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described further.
In conjunction with Fig. 1 and Fig. 2, a kind of automobile lead sectional area measuring method of the present invention, a series of number is first carried out
According to initialization step, including：By standard maximum electric current IBWith gauge wire area of section ABIt is input in a searching modul, this is looked into
Look for module can be specifically the data link table in data base or data structure, storehouse or queue.The typing of this data is with reference to Fig. 2
Plays maximum current IBWith gauge wire area of section ABCorresponding form.Determined a series of by the data of user input
Parameter, these parameters include conductor length, supply voltage, terminal maximum pressure drop, circuit maximum pressure drop, bearing power, select ring
Border temperature, lead material（Automobile wire is copper）With parameters such as line set numbers.Subsequently execution step a:Calculated according to conductor cross-section
Formula: A = I×ρ×L/UdCalculate and estimate conductor cross-section area A.Wherein：I = P/U ；I is current in wire, and P is vehicle-mounted
Appliance power, U is supply voltage；ρ is conductor resistance rate, and L is conductor length；Ud=U1+U2UdFor allowing circuit maximum voltage to damage
Lose, U1For the loss of circuit maximum voltage, U2For the loss of terminal maximum voltage.Step b:According to Current calculation formula Imax= (10
× A+8)/2 calculate that wire can bear estimate maximum current Imax.Step c:According to estimating maximum current ImaxLookup
The standard maximum electric current I joiningBWith gauge wire area of section AB.For example through calculating and estimate maximum current ImaxFor 9.8A,
Corresponding form so according to Fig. 2 is it is known that matching standard maximum electric current is 12A（Maximum normalized current can only more than or
It is equal to and estimate maximum current）, accordingly with this standard maximum electric current corresponding gauge wire area ABFor 0.8mm2.Step d:
Maximum current I is estimated described in judgementmaxWhether satisfaction verifies formula IB×α×β > Imax, if it is, described standard is cut
Face area ABOutput, if it is not, then return to step c, searches the standard maximum electric current of coupling again.Wherein：α is line set number band
The electric current reduction ratio coming；The electric current reduction ratio that β brings for ambient temperature.Specifically, for example estimate maximum current ImaxFor
9.8A, the standard maximum electric current I of couplingBFor 12A, through calculating, IB×α×β ≤ Imax.The then standard maximum of description selection
Electric current is improper, needs to reselect, then according to Fig. 2, the standard maximum electric current again finding coupling is 15A, with this standard
Maximum current corresponding gauge wire area ABFor 1mm2, re-verify whether to meet formula IB×α×β > Imax.So past
Multiple, until meeting this satisfaction checking formula.The gauge wire area of section A of condition finally will be metBExport to an output module,
This output module is specially display or printer.
According to measuring method above, the present invention has carried out software design to it on the basis of the method, only need to be in choosing
Select input lead length in the middle of condition, supply voltage, terminal maximum pressure drop, circuit maximum pressure drop, bearing power, Environment temperature
Degree, lead material（Automobile wire is copper）With line set number.Click select button, just can select the conductor cross-section meeting condition
Long-pending.Fig. 3 is the computer software main interface of the automobile lead sectional area measuring method of the present invention, and this software passes through VB
（Visual Basic）Realize, click " calling example " button, or input alternative condition in alternative condition, then click " choosing
Select " button, by computer, flow process is calculated according to the method described above, can obtain the wire of system recommendation in selection result
Sectional area, clicks " exiting " button after the completion of selection.
Claims (5)
1. a kind of automobile lead sectional area measuring method is it is characterised in that include step：
A () calculates according to conductor cross-section computing formula (1) and estimates conductor cross-section area A；
A=I × ρ × L/Ud(1)
B () estimates maximum current I according to what Current calculation formula (2) calculated that wire can bearmax；
Imax=(10 × A+8)/2 (2)
C () basis estimates maximum current ImaxSearch the standard maximum electric current I of couplingBWith gauge wire area of section AB；
D () estimates maximum current I described in judgingmaxWhether satisfaction checking formula (3), if it is, by described gauge wire section
Area ABOutput, if it is not, then return to step (c)；
IB×α×β>Imax(3)
Wherein：In described conductor cross-section computing formula (1)：
I=P/U, I are current in wire, and P is vehicle-mounted appliance power, and U is supply voltage；ρ is conductor resistance rate, and L is that wire is long
Degree；
Ud=U1+U2, UdFor allowing the loss of circuit maximum voltage, U1For the loss of circuit maximum voltage, U2Damage for terminal maximum voltage
Lose；
In described checking formula (3)：
The electric current reduction ratio that α brings for line set number；
The electric current reduction ratio that β brings for ambient temperature.
2. automobile lead sectional area measuring method according to claim 1 it is characterised in that：Before described step (a),
Also include described standard maximum electric current IBWith gauge wire area of section ABIt is input to the step in a searching modul；Described step
Suddenly in (c), according to estimating maximum current ImaxThe standard maximum electric current I of coupling is searched in this searching modulBCut with gauge wire
Face area AB.
3. automobile lead sectional area measuring method according to claim 2 it is characterised in that：Described searching modul is number
According to storehouse or data link table.
4. automobile lead sectional area measuring method according to claim 1 it is characterised in that：In described step (d), will
Described gauge wire area of section ABExport to an output module.
5. automobile lead sectional area measuring method according to claim 4 it is characterised in that：Described output module is aobvious
Show device or printer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210288761.2A CN103593544B (en) | 2012-08-14 | 2012-08-14 | Automobile lead sectional area measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210288761.2A CN103593544B (en) | 2012-08-14 | 2012-08-14 | Automobile lead sectional area measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103593544A CN103593544A (en) | 2014-02-19 |
| CN103593544B true CN103593544B (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210288761.2A Active CN103593544B (en) | 2012-08-14 | 2012-08-14 | Automobile lead sectional area measuring method |
Country Status (1)
| Country | Link |
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| CN (1) | CN103593544B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870831B (en) * | 2016-05-17 | 2018-06-12 | 利亚德光电股份有限公司 | cable selection method |
| CN109612422B (en) * | 2018-12-18 | 2020-11-24 | 吴江变压器有限公司 | Method for measuring actual average cross-sectional area and length of transformer wire |
-
2012
- 2012-08-14 CN CN201210288761.2A patent/CN103593544B/en active Active
Non-Patent Citations (3)
| Title |
|---|
| 合理选择导线截面的探讨;何伟;《机械与电气》;20080528(第5期);第100-105页 * |
| 汽车电系低压导线截面的正确选择;关友康;《汽车电器》;19850501(第2期);第29-31页 * |
| 汽车电线束导线的选择;蒋廷云;《汽车电器》;20111201(第12期);第29-32页 * |
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| Publication number | Publication date |
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| CN103593544A (en) | 2014-02-19 |
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