Automobile lead sectional area measuring method
Automobile lead sectional area measuring method
 CN 103,593,544 B
 Filed: 08/14/2012
 Issued: 02/08/2017
 Est. Priority Date: 08/14/2012
 Status: Active Grant
First Claim
1. a kind of automobile lead sectional area measuring method is it is characterised in that include step：
 A () calculates according to conductor crosssection computing formula (1) and estimates conductor crosssection area A；
A=I ×
ρ
×
L/U_{d}(1)B () estimates maximum current I according to what Current calculation formula (2) calculated that wire can bear_{max}；
I_{max}=(10 ×
A+8)/2 (2)C () basis estimates maximum current I_{max}Search the standard maximum electric current I of coupling_{B}With gauge wire area of section A_{B}；
D () estimates maximum current I described in judging_{max}Whether satisfaction checking formula (3), if it is, by described gauge wire sectionArea A_{B}Output, if it is not, then return to step (c)；
I_{B}×
α
×
β
>
I_{max}(3)Wherein：
In described conductor crosssection computing formula (1)：
I=P/U, I are current in wire, and P is vehiclemounted appliance power, and U is supply voltage；
ρ
is conductor resistance rate, and L is that wire is longDegree；
U_{d}=U_{1}+U_{2}, U_{d}For allowing the loss of circuit maximum voltage, U_{1}For the loss of circuit maximum voltage, U_{2}Damage for terminal maximum voltageLose；
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.
Litigations
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.
5 Claims

1. a kind of automobile lead sectional area measuring method is it is characterised in that include step：

A () calculates according to conductor crosssection computing formula (1) and estimates conductor crosssection area A； A=I ×
ρ
×
L/U_{d}(1)B () estimates maximum current I according to what Current calculation formula (2) calculated that wire can bear_{max}； I_{max}=(10 ×
A+8)/2 (2)C () basis estimates maximum current I_{max}Search the standard maximum electric current I of coupling_{B}With gauge wire area of section A_{B}； D () estimates maximum current I described in judging_{max}Whether satisfaction checking formula (3), if it is, by described gauge wire sectionArea A_{B}Output, if it is not, then return to step (c)； I_{B}×
α
×
β
>
I_{max}(3)Wherein：
In described conductor crosssection computing formula (1)：I=P/U, I are current in wire, and P is vehiclemounted appliance power, and U is supply voltage；
ρ
is conductor resistance rate, and L is that wire is longDegree；U_{d}=U_{1}+U_{2}, U_{d}For allowing the loss of circuit maximum voltage, U_{1}For the loss of circuit maximum voltage, U_{2}Damage for terminal maximum voltageLose； 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 I_{B}With gauge wire area of section A_{B}It is input to the step in a searching modul；
Described stepSuddenly in (c), according to estimating maximum current I_{max}The standard maximum electric current I of coupling is searched in this searching modul_{B}Cut with gauge wireFace area A_{B}.
 Before described step (a),Also include described standard maximum electric current I_{B}With gauge wire area of section A_{B}It is input to the step in a searching modul；

3. automobile lead sectional area measuring method according to claim 2 it is characterised in that：
 Described searching modul is numberAccording 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), willDescribed gauge wire area of section A_{B}Export to an output module.

5. automobile lead sectional area measuring method according to claim 4 it is characterised in that：
 Described output module is aobviousShow device or printer.
Specification(s)