CN106526348A - Detection method and apparatus for the reliability of high voltage wiring harness - Google Patents
Detection method and apparatus for the reliability of high voltage wiring harness Download PDFInfo
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- CN106526348A CN106526348A CN201510583329.XA CN201510583329A CN106526348A CN 106526348 A CN106526348 A CN 106526348A CN 201510583329 A CN201510583329 A CN 201510583329A CN 106526348 A CN106526348 A CN 106526348A
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- wiring harness
- voltage wiring
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Abstract
The invention relates to a detection method and apparatus for the reliability of high voltage wiring harness wherein the method comprises the following steps: obtaining the dynamic current data of high voltage wiring harness measured across a vehicle circuit in the traveling process of the vehicle as well as the surface temperature Tx of the high voltage wiring harness; according to the dynamic current data, selecting a power supply and a load; based on the power supply and the load, constructing a testing loop; installing the high voltage wiring harness into the testing loop; measuring the temperature changing value delta Tx of the wiring core of the high voltage wiring harness before and after the power-on of the testing loop; and based on the surface temperature Tx and the temperature changing value delta Tx of the wiring core as well as the temperature resisting value T of the high voltage wiring harness, determining the reliability of the high voltage wiring harness. With the detection method and apparatus for the reliability of high voltage wiring harness, the cost of detecting the reliability of high voltage wiring harness can be reduced and the detection efficiency is increased.
Description
Technical field
The present invention relates to automobile technical field, more particularly to high-voltage wiring harness reliability checking method and device.
Background technology
High-voltage wiring harness is the important component part of automotive wire bundle, and its reliability has a strong impact on the security performance of automobile,
Therefore it is of crucial importance for the judgement of high-voltage wiring harness reliability.
High pressure to human body have more serious harm, directly under environment under high pressure testing high voltage wire harness cable
To realize the judgement of high-voltage wiring harness reliability, this method is dangerous high for the temperature rise of core.Current many producers
Electric current is estimated typically by parameters such as electrical equipment (motor, controller etc.) power, voltages, further according to estimation
Electric current carry out the line footpath of type selecting cable and by the durable checking of real vehicle, judge the reliability of high-voltage wiring harness with this；
But in above-mentioned high-voltage wiring harness reliability checking method, when the cable diameter of high-voltage wiring harness was selected slightly, its
Detection performance can reach requirement, can but cause testing cost high；When cable diameter from it is meticulous when, because resistance to
Long car quantity is very limited, might not find the problem in detection process in time, even if problem can be by
Find in time, it is also necessary to could find in durable car process of the test, so change again design and will cause
Development of projects postpones；Prior art lacks the scheme of the cable diameter thickness for selecting high-voltage wiring harness, causes high pressure
The cost of wire harness reliability detection and efficiency are difficult to controlled.
The content of the invention
Based on this, it is necessary to be difficult to for the cost and efficiency of the detection of prior art mesohigh wire harness reliability
Controlled technical problem, there is provided a kind of high-voltage wiring harness reliability checking method and device.
A kind of high-voltage wiring harness reliability checking method, comprises the steps：
The dynamic current data by the high-voltage wiring harness in automobile circuit that acquisition is measured in vehicle traveling process
And surface temperature Tx of the high-voltage wiring harness；
Power supply and load are selected according to the dynamic current data, is set up according to the power supply and load and is tested back
Road；
The high-voltage wiring harness is arranged in the test loop, measures described before and after the test loop is powered
The core temperature changing value Δ Tx of high-voltage wiring harness；
According to the resistance to temperature value of surface temperature Tx, the core temperature changing value Δ Tx and the high-voltage wiring harness
T determines the reliability of the high-voltage wiring harness.
Above-mentioned high-voltage wiring harness reliability checking method, passes through high-voltage wiring harness in vehicle traveling process by obtaining
Dynamic current data and high-voltage wiring harness surface temperature Tx, further according to above-mentioned dynamic current data select power supply
Test loop is set up with load, it is before and after obtaining test loop energization, high in above-mentioned test loop
The temperature change value Δ Tx of line ball bunch core, then obtain the T of resistance to temperature value of high-voltage wiring harness, according to surface temperature Tx,
Core temperature changing value Δ Tx, the T of resistance to temperature value detect the reliability of above-mentioned high-voltage wiring harness, need not rely on high-voltage wiring harness
Cable diameter thickness just can realize the detection of high-voltage wiring harness reliability, it is to avoid by selecting thick height
Line ball Shu Jinhang detections it also avoid using ensureing high cost problem that detection accuracy this scheme is brought
Meticulous high-voltage wiring harness detection affects the technical problem of detection efficiency；The detection of high-voltage wiring harness reliability can be reduced
Cost, improves corresponding detection efficiency.
A kind of high-voltage wiring harness reliability detecting device, including：Current measuring device, the first temperature measuring equipment,
Power supply, load, second temperature measurement apparatus and high-voltage wiring harness to be measured；
The power supply, load and high-voltage wiring harness to be measured connect to form series loop by wire；
The current measuring device is for the measurement in vehicle traveling process by the high pressure to be measured in automobile circuit
The dynamic current data of wire harness；
First temperature measuring equipment is for the high pressure to be measured in the measurement automobile circuit in vehicle traveling process
Surface temperature Tx of wire harness；
The power supply and the load are made by the string for being adjusted according to the dynamic current data
The electric current in connection loop is consistent with the dynamic current data；
The second temperature measurement apparatus are used for measuring the core temperature of high-voltage wiring harness to be measured in the series loop
Degree；
The T of resistance to temperature value of surface temperature Tx, the core temperature and the high-voltage wiring harness to be measured is used for judging
The reliability of the high-voltage wiring harness to be measured.
Above-mentioned high-voltage wiring harness reliability detecting device, is measured in vehicle traveling process by current measuring device
The dynamic current data of the high-voltage wiring harness to be measured in by automobile circuit, the measurement of the first temperature measuring equipment are described
Surface temperature Tx of high-voltage wiring harness to be measured；According to above-mentioned dynamic current data adjust include power supply, load and
Electric current in the series loop of high-voltage wiring harness to be measured, makes the electric current and the dynamic current in above-mentioned series loop
Data are consistent, i.e., the conduction time of described series loop is termination time and the starting of the dynamic current data
The difference of time is equal in the value at corresponding moment to the dynamic current data by the electric current of the series loop；
Second temperature measurement apparatus are recycled to measure the core temperature of high-voltage wiring harness to be measured in the series loop, with root
According to surface temperature Tx, the core temperature and the high-voltage wiring harness to be measured the T of resistance to temperature value judge described in treat
Survey the reliability of high-voltage wiring harness；The reliability of high-voltage wiring harness is made to detect the thickness that need not consider its cable diameter,
Can avoid by selecting thick high-voltage wiring harness to be detected ensureing that detection accuracy this scheme is brought
High cost problem, it is also possible to avoid the technical problem for causing detection efficiency low using the detection of meticulous high-voltage wiring harness,
So as to reduce the testing cost of high-voltage wiring harness, its detection efficiency is improve.
Description of the drawings
High-voltage wiring harness reliability checking method flow charts of the Fig. 1 for one embodiment；
Dynamic current curve synoptic diagrams of the Fig. 2 for one embodiment；
Equivalent square-wave curve schematic diagrams of the Fig. 3 for one embodiment；
Fig. 4 is the automobile driving speed schematic diagram in certain time in the vehicle traveling process of one embodiment.
Specific embodiment
Detailed is made to the specific embodiment of the high-voltage wiring harness reliability checking method of the present invention below in conjunction with the accompanying drawings
Description.
With reference to Fig. 1, Fig. 1 show the high-voltage wiring harness reliability checking method flow chart of one embodiment, including
Following steps：
S10, obtains the dynamic current by the high-voltage wiring harness in automobile circuit measured in vehicle traveling process
Surface temperature Tx of data and the high-voltage wiring harness；
In above-mentioned steps S10, high-voltage wiring harness is arranged in certain loop of automobile circuit, in running car
During measurement by the dynamic current data in the loop, and the surface temperature of high-voltage wiring harness, i.e., in real vehicle
Under operating mode, collection judges the related data of high-voltage wiring harness reliability, it is ensured that the accuracy of the data for being gathered,
The accuracy of high-voltage wiring harness reliability detection is improved further.The surface temperature of above-mentioned high-voltage wiring harness can be chosen
During measurement, the temperature maximum on high-voltage wiring harness surface.Wherein, dynamic current data are the running car time period
Interior time dependent multiple current values can show as the time dependent current versus time curve of electric current；
Surface temperature be the running car time period in time dependent multiple temperature values or can show as temperature with
The temperature-time curve of time change.
Above-mentioned automobile can arrange more intensive urban district road according to general restriction travel speed and traffic lights
Condition, it is also possible to according to the relatively little of suburb road conditions traveling of traffic lights set amount.
S20, selects power supply and load according to the dynamic current data, sets up examination according to the power supply and load
Test loop；
In above-mentioned steps S20, the dynamic current data are within the time period of running car, by installing
The electric current in high-voltage wiring harness loop, its specific current value may be different with time point difference；Can select to close
Suitable power supply and corresponding load, constitute a test loop, and the energization period of the test loop is equal to automobile
The length of running time section, in the galvanization of above-mentioned test loop, the electric current for being passed through and above-mentioned dynamic
Current data is consistent, i.e. initial time of the energization initial time of the test loop corresponding to running car, on
State the termination time of the energization termination time corresponding to running car of test loop, the conduction time of test loop
Section was corresponded with the moment in the running car time period, and the test loop current value at corresponding moment is dynamic with above-mentioned
State current data value size and variation tendency are identical.Above-mentioned power supply can select safer low electricity
Voltage source, such as 12V (volt) power supply etc.；Above-mentioned load can select programmable electronic to load, and also may be used
To select other to load.
S30, the high-voltage wiring harness is arranged in the test loop, before and after measuring the test loop energization
The core temperature changing value Δ Tx of the high-voltage wiring harness；
In above-mentioned steps S30, the temperature of high-voltage wiring harness core can be powered with test loop after size of current,
And conduction time length and change；Before test loop is powered, the temperature one of above-mentioned high-voltage wiring harness core
As it is suitable with room temperature, after energization, the temperature of high-voltage wiring harness core can be raised, and its elevated degree is big with electric current
The factors such as little and conduction time length are relevant.
S40, according to surface temperature Tx, the core temperature changing value Δ Tx and the high-voltage wiring harness
The T of resistance to temperature value determines the reliability of the high-voltage wiring harness.
In above-mentioned steps S40, the T of resistance to temperature value of high-voltage wiring harness can read from the Technical specification of high-voltage wiring harness
Take；Can be according between meansigma methodss Tx of surface temperature, core temperature changing value Δ Tx, the T of resistance to temperature value threes
A certain relation judges the reliability of corresponding high-voltage wiring harness；Generally, corresponding relation is set up, then can be with
Illustrate the reliability compliance of above-mentioned high-voltage wiring harness；Above-mentioned surface temperature Tx, core temperature changing value Δ Tx are
Performance graph or dynamic data in certain time period；Such as, surface temperature Tx is the running car time period
Interior time dependent multiple temperature values can show as the time dependent temperature-time curve of temperature；
Core temperature changing value Δ Tx is that core temperature changing value Δ Tx is with the time in above-mentioned test loop conduction time section
Change multiple temperature change values, or core temperature changing value Δ Tx can also show as its temperature change value with
Temperature change value-the time graph of test loop conduction time change.It is above-mentioned to carry out high-voltage wiring harness reliability detection
Surface temperature Tx, core temperature changing value Δ Tx be the corresponding surface temperature of same data in dynamic current data
Degree Tx and core temperature changing value Δ Tx, or the corresponding corresponding surface of moment point on its current versus time curve
Temperature Tx and core temperature changing value Δ Tx.
The high-voltage wiring harness reliability checking method that the present embodiment is provided, is led in vehicle traveling process by obtaining
The dynamic current data and surface temperature Tx of high-voltage wiring harness of high-voltage wiring harness are crossed, further according to above-mentioned dynamic electric fluxion
According to selecting power supply and loading to set up test loop, to obtain before test loop is powered and after energization, it is arranged on
The temperature change value Δ Tx of above-mentioned test loop mesohigh wire harness core, then the T of resistance to temperature value of high-voltage wiring harness is obtained,
The reliability of above-mentioned high-voltage wiring harness is detected according to surface temperature Tx, core temperature changing value Δ Tx, the T of resistance to temperature value,
The cable diameter thickness that high-voltage wiring harness need not be relied on just can realize the detection of high-voltage wiring harness reliability, it is to avoid
Ensure that by selecting thick high-voltage wiring harness to be detected the high cost that detection accuracy this scheme is brought is asked
Topic, it also avoid detecting using meticulous high-voltage wiring harness affects the technical problem of detection efficiency；High pressure can be reduced
The cost of wire harness reliability detection, improves its detection efficiency.
In one embodiment, above-mentioned acquisition measure in vehicle traveling process by the height in automobile circuit
The process of surface temperature Tx of the dynamic current data of line ball beam and the high-voltage wiring harness can include：
The dynamic current value of the high-voltage wiring harness of Each point in time measurement is obtained, according to the dynamic current value
The current sequence of dynamic current data is obtained, the Each point in time is divided in referring to the vehicle traveling process
For multiple time points；
The surface temperature value of the high-voltage wiring harness of Each point in time measurement is obtained, according to the surface temperature value
Obtain the temperature sequence of surface temperature Tx.
In the present embodiment, the running time of automobile is divided into into multiple time points, dividing mode therein can be with
Including being evenly dividing, the various ways such as random division, the division density of its time point can be according to related survey
Accuracy of measurement is set.In above-mentioned Each point in time, the dynamic current in high-voltage wiring harness loop is installed in measurement respectively
Value, to obtain the current sequence corresponding to above-mentioned dynamic current data；Survey in above-mentioned Each point in time respectively
The surface temperature value of the high-voltage wiring harness is measured, to obtain the temperature sequence corresponding to above-mentioned surface temperature Tx, just
In being subsequently utilized respectively current sequence and temperature sequence to corresponding dynamic current value and the place of surface temperature value
Reason.
As one embodiment, the above-mentioned current sequence for being worth to dynamic current data according to the dynamic current
Process can include：
The dynamic current value for obtaining is measured according to the Each point in time obtains initial current sequence；
Calculate the current average of the initial current sequence；
Find out from the initial current sequence with the difference of the current average more than the first preset range value
Dynamic current peak value, remove the dynamic current peak value in the initial current sequence, obtain equivalent
Current sequence；
And also include after the process for obtaining the equivalent current sequence：
Dynamic current square-wave curve equivalent therewith is obtained according to the current sequence.
In the present embodiment, above-mentioned first preset range value can be according to moving that the initial current sequence is included
State current value number and each dynamic current value are determined with the concrete deviation of current average；Above-mentioned initial current sequence
In row with the difference of the current average more than the first preset range value dynamic current value, i.e., above-mentioned dynamic electric
Stream peak value, is the larger dynamic current value of error；Above-mentioned dynamic current peak value is removed, can be effective
Weaken the impact that error information is brought to reliability detection, improve the accuracy of follow-up result of determination.
Can be being obtained therewith etc. according to the current sequence after the process for obtaining the equivalent current sequence
The dynamic current square-wave curve of effect；So that subsequent process can be according to the dynamic current square-wave curve of above-mentioned rule
Select power supply and load to set up test loop, improve the effectiveness of set up test loop.
It is as one embodiment, above-mentioned to obtain dynamic current square wave song equivalent therewith according to the current sequence
The process of line can include：
Dynamic current curve is described according to the current sequence；
According to dynamic current curve acquisition square-wave curve equivalent therewith, the square-wave curve of above-mentioned rule is
For state current square wave curve.
The dynamic current curve described according to the dynamic current after renewal is irregular curve, and its curve shows
Being intended to can be with as shown in Fig. 2 Fig. 2 be a current versus time curve figure, its abscissa express time, and unit is
S, vertical coordinate represent electric current, and unit is A (ampere).Above-mentioned dynamic current curve is equivalent to into the square wave of rule
Curve, it is above-mentioned irregular dynamic current curve is equivalent to into the schematic diagram after the square-wave curve of rule can be as
Shown in Fig. 3, in Fig. 3, its abscissa express time, unit is s, and vertical coordinate represents electric current, and unit is A
(ampere).
In one embodiment, the above-mentioned process for being worth to temperature sequence according to the surface temperature includes：
The surface temperature value for obtaining is measured according to the Each point in time obtains initial temperature sequence；
Calculate the temperature averages of the initial temperature sequence；
Find out from the initial temperature sequence with the difference of the temperature averages more than the second preset range value
Surface temperature peak value, remove the surface temperature peak value in the initial temperature sequence, obtain equivalent
Temperature sequence.
In the present embodiment, the second preset range value can be according to the surface temperature included in initial temperature sequence
Value number and each surface temperature value are determined with the concrete deviation of its meansigma methods；With the temperature in initial temperature sequence
The difference of degree meansigma methodss is the larger surface temperature value of error more than the surface temperature value of the second preset range value, i.e.,
Above-mentioned surface temperature peak value；Above-mentioned surface temperature peak value is deleted, can effectively be weakened error information pair
The impact that reliability detection brings, improves the accuracy of follow-up result of determination.
In one embodiment, it is above-mentioned according to surface temperature Tx, the core temperature changing value Δ Tx, with
And the T of resistance to temperature value of the high-voltage wiring harness can include the step of determining the reliability of the high-voltage wiring harness：
By the T of resistance to temperature value of surface temperature Tx, the core temperature changing value Δ Tx and the high-voltage wiring harness
Judge in substituting into reliability detection relational expression whether the reliability detection relational expression is set up；Wherein, it is described can
By property detection relational expression it is：Tx+ΔTx≤T；
If the reliability detection relational expression is set up, the high-voltage wiring harness reliability is judged.
In the present embodiment, substitute into above-mentioned reliability detection relational expression carry out reliability detection surface temperature Tx,
Core temperature changing value Δ Tx is corresponding surface temperature Tx of same data and core temperature in dynamic current data
Degree changing value Δ Tx；Or on the current versus time curve of dynamic current data the corresponding surface temperature of same point
Tx and core temperature changing value Δ Tx.
In one embodiment, above-mentioned vehicle traveling process can include：
First runs over journey, gives it the gun to First Speed, and keeps the First Speed at the uniform velocity to travel first
Preset Time, decelerates to 0, stops the second Preset Time, further accelerates traveling to second speed, and keeps described
Second speed at the uniform velocity travels the 3rd Preset Time, decelerates to 0, stops the 4th Preset Time, further accelerates traveling extremely
Third speed, and keep the third speed at the uniform velocity to travel the 5th Preset Time, 0 is decelerated to, stops the 6th pre-
If the time；Cheng Xunhuan is run over according to described first and travels the first preset times；
Second traveling process, gives it the gun to fourth speed, and keeps the fourth speed at the uniform velocity to travel the 7th
Preset Time, then Reduced Speed Now is to the 5th speed, and keep the 5th speed at the uniform velocity travel the 8th it is default when
Between, further accelerate traveling to the 6th speed, and keep the 6th speed speed at the uniform velocity travel the 9th it is default when
Between, traveling is further accelerated to the 7th speed, and keep the 7th speed at the uniform velocity to travel the tenth Preset Time, then
Give it the gun to the 8th speed, and keep the 8th speed at the uniform velocity to travel the 11st Preset Time, then slow down
To 0；According to described second traveling process circulation the second preset times of traveling.
In the present embodiment, above-mentioned First Speed, second speed, third speed, fourth speed, the 5th speed,
6th speed, the 7th speed, the 8th speed, the first preset times, the second preset times, and first is pre-
If multiple Preset Times such as time, the second Preset Time, these parameters can be according to specific road environments
Arranged accordingly.
Used as one embodiment, the First Speed is 15km/h, and the second speed is 40km/h, described
Third speed is 50km/h；First Preset Time is 10s, and second Preset Time is 30s, described
3rd Preset Time is 30s, and the 4th Preset Time is 30s, and the 5th Preset Time is 20s, described
6th Preset Time is 30S；First preset times are 4 times；
The fourth speed is 70km/h, and the 5th speed is 50km/h, and the 6th speed is 70km/h,
7th speed is 100km/h, and the 8th speed is 120km/h；7th Preset Time be 70s, institute
The 8th Preset Time is stated for 70s, the 9th Preset Time is 50s, the tenth Preset Time is 40s, institute
The 11st Preset Time is stated for 10s；Second preset times are 3 times.
Fig. 4 shows interior for the previous period automobile driving speed schematic diagram in the vehicle traveling process of the present embodiment,
In the figure, abscissa express time, unit is s (second), and vertical coordinate represents speed, and unit is km/h (thousand
Rice is per hour).
Above-mentioned first runs over journey can refer to that, under the environment that urban district traffic lights arrange more intensive, automobile needs
The red lights such as iterative cycles deceleration stopping, recurrence step accelerate such traveling process；Second traveling process can refer to
Suburb vehicle is less, and traffic lights arrange relatively fewer, and speed travels process faster.Run over same
Journey includes the road conditions environment in urban district and suburb, can make measured related data more comprehensively, that is, improve
For high-voltage wiring harness reliability detection data it is comprehensive, be further ensured that high-voltage wiring harness reliability detect
Accuracy.
In one embodiment, high-voltage wiring harness reliability detecting device includes：It is current measuring device, first warm
Degree measurement apparatus, power supply, load, second temperature measurement apparatus and high-voltage wiring harness to be measured；
The power supply, load and high-voltage wiring harness to be measured connect to form series loop by wire；
The current measuring device is for the measurement in vehicle traveling process by the high pressure to be measured in automobile circuit
The dynamic current data of wire harness；
First temperature measuring equipment is for the high pressure to be measured in the measurement automobile circuit in vehicle traveling process
Surface temperature Tx of wire harness；
The power supply and the load are made by the string for being adjusted according to the dynamic current data
The electric current in connection loop is consistent with the dynamic current data；
The second temperature measurement apparatus are used for measuring the core temperature of high-voltage wiring harness to be measured in the series loop
Degree；
The T of resistance to temperature value of surface temperature Tx, the core temperature and the high-voltage wiring harness to be measured is used for judging
The reliability of the high-voltage wiring harness to be measured.
In the present embodiment, can be arranged on above-mentioned current measuring device includes the vapour of above-mentioned high-voltage wiring harness to be measured
In car loop, to measure in vehicle traveling process by the dynamic current data of above-mentioned high-voltage wiring harness to be measured；
Above-mentioned current measuring device can include that current sensor, oscillograph etc. can obtain dynamic electric in corresponding circuit
The device of flow data；Above-mentioned dynamic current data are time dependent multiple electric currents in the running car time period
Value can show as the time dependent current versus time curve of electric current.
Above-mentioned first temperature measuring equipment can be with the dress of measurement temperature for temperature sensor or electronic instrument for measuring temperature etc.
Put；The acquisition of relevant temperature can be realized using the temperature probe of the measurement apparatus such as electronic instrument for measuring temperature；Above-mentioned
Surface temperature Tx measured by one temperature measuring equipment can be time dependent many in the running car time period
Individual temperature value can show as the time dependent temperature-time curve of temperature.
Above-mentioned power supply, load and high-voltage wiring harness to be measured, can be with roots after wire connects and to form series loop
According to above-mentioned dynamic current data corresponding duration, the powers duration of above-mentioned power supply is set；The power supply electricity of above-mentioned power supply
Pressure could be arranged to comparatively safe low-voltage, such as 12V etc.；Above-mentioned power-on time and power supply electricity are set
After pressure, above-mentioned load can be arranged accordingly according to the characteristics of above-mentioned dynamic current data, be made above-mentioned
It is consistent with above-mentioned dynamic current data by the electric current of above-mentioned series loop, i.e., by the electricity of above-mentioned series loop
Stream is identical in the current value size and its variation tendency at corresponding moment to above-mentioned dynamic current data.On
It can be programmable power supply to state power supply, control power-on time, the power supply electricity of power supply by computer software programming
The parameters such as pressure, to ensure accuracy that above-mentioned power supply is powered；Above-mentioned load can be loaded for programmable electronic,
The load of above-mentioned programmable electronic refers to and adopts high performance chipses, there is provided 0.1mV (millivolt), 0.01mA (milliampere)
Resolution (basic accuracy is 0.03%, fundamental current rate of climb 2.5A/us) load machines；It is above-mentioned to compile
Journey electronic load can quickly change the electricity in the series loop according to the supply voltage in above-mentioned series loop
Stream, allows the electric current and above-mentioned dynamic current data strict conformance in corresponding series loop.
Above-mentioned second temperature measurement apparatus can be with the dress of measurement temperature for temperature sensor or electronic instrument for measuring temperature etc.
Put；Core temperature measured by which can be with when the size of current after above-mentioned series loop energization and energization
Between length and change, before above-mentioned series loop is powered, above-mentioned core temperature is typically suitable with room temperature, logical
After electricity, above-mentioned core temperature can be raised, its elevated degree and size of current and conduction time length etc. because
Have pass.Above-mentioned second temperature measurement apparatus can be continuously measured in the conduction time section of above-mentioned series loop
The core temperature of corresponding high-voltage wiring harness to be measured, for basis not measured in the same time core temperature with its
Core temperature measured by the energization initial time of above-mentioned series loop, when obtaining the measurement moment with being powered initial
Core temperature changing value Δ Tx between quarter.
The T of resistance to temperature value of above-mentioned high-voltage wiring harness can be read from the Technical specification of high-voltage wiring harness；Can be according to upper
State meansigma methodss Tx of surface temperature, a certain relation between core temperature changing value Δ Tx, the T of resistance to temperature value threes to sentence
The reliability of disconnected corresponding high-voltage wiring harness；Generally, corresponding relation is set up, then can illustrate above-mentioned height
The reliability compliance of line ball beam；Above-mentioned surface temperature Tx, core temperature changing value Δ Tx are in certain time period
Interior performance graph or dynamic data；Such as, surface temperature Tx is running car time period interior anaplasia at any time
Multiple temperature values of change can show as the time dependent temperature-time curve of temperature；Core temperature becomes
Change value Δ Tx is that changing value Δ Tx is time dependent multiple for core temperature in above-mentioned test loop conduction time section
Temperature change value, or core temperature changing value Δ Tx can also to show as its temperature change value logical with test loop
Temperature change value-the time graph of electric time change.The above-mentioned surface temperature for carrying out high-voltage wiring harness reliability detection
Tx, core temperature changing value Δ Tx are corresponding surface temperature Tx of same data and core in dynamic current data
Temperature change value Δ Tx, or corresponding surface temperature Tx of corresponding moment point and line on its current versus time curve
Core temperature change value Δ Tx.
The high-voltage wiring harness reliability detecting device that the present embodiment is provided, by current measuring device in running car
During dynamic current data of the measurement by the high-voltage wiring harness to be measured in automobile circuit, the first temperature survey dress
Put surface temperature Tx for measuring the high-voltage wiring harness to be measured；According to above-mentioned dynamic current data adjust include power supply,
Electric current in load and the series loop of high-voltage wiring harness to be measured, make electric current in above-mentioned series loop with it is described
Dynamic current data are consistent, i.e., when the conduction time of described series loop is the termination of the dynamic current data
Between difference with initial time, by the electric current of the series loop to the dynamic current data at the corresponding moment
Value it is equal；Second temperature measurement apparatus are recycled to measure the core of high-voltage wiring harness to be measured in the series loop
Temperature, with the T of resistance to temperature value according to surface temperature Tx, the core temperature and the high-voltage wiring harness to be measured
Judge the reliability of the high-voltage wiring harness to be measured；Make the reliability detection of high-voltage wiring harness consider its cable
The thickness in footpath, can avoid by selecting thick high-voltage wiring harness to carry out detection ensure detection accuracy this
The high cost problem that scheme is brought, it is also possible to avoid causing detection efficiency low using the detection of meticulous high-voltage wiring harness
Technical problem, so as to reduce the testing cost of high-voltage wiring harness, improves its detection efficiency.
In one embodiment, above-mentioned high-voltage wiring harness reliability detecting device can also include processor；It is described
Processor connects the first temperature measuring equipment and second temperature measurement apparatus respectively；
First temperature measuring equipment measures surface temperature Tx, and by surface temperature Tx send to
Processor；
The second temperature measurement apparatus measure the core temperature, and the core temperature is sent to process
Device；
The processor is used for calculating core temperature and the series loop in the series loop galvanization
The difference of the core temperature of energization initial time, obtains core temperature changing value Δ Tx；By surface temperature Tx,
The T of resistance to temperature value of the core temperature changing value Δ Tx and the high-voltage wiring harness to be measured substitutes into reliability detection and closes
It is to judge whether the reliability detection relational expression is set up in formula；If the reliability detection relational expression is set up,
Then judge the high-voltage wiring harness reliability to be measured；Wherein, the reliability detection relational expression is：Tx+ΔTx≤T.
In the present embodiment, above-mentioned first temperature measuring equipment can be wirelessly transferred or wire transmission in the form of
Surface temperature Tx is sent to processor；Above-mentioned second temperature measurement apparatus being wirelessly transferred or
The form of wire transmission sends the core temperature to processor；It is above-mentioned that to be wirelessly transferred form corresponding wireless
Network can be included by public mobile network (such as 4G, 3G or GPRS) or WLAN (WiFi)
Etc..
After above-mentioned first temperature measuring equipment and second temperature measurement apparatus obtain corresponding temperature data, in time
Sending to processor carries out the detection of above-mentioned high-voltage wiring harness reliability to be measured, can further improve its detection effect
Rate.
Each technical characteristic of embodiment described above arbitrarily can be combined, for making description succinct, not right
The all possible combination of each technical characteristic in above-described embodiment is all described, as long as however, these skills
There is no contradiction in the combination of art feature, be all considered to be the scope of this specification record.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed,
But therefore can not be construed as limiting the scope of the patent.It should be pointed out that for this area
For those of ordinary skill, without departing from the inventive concept of the premise, some deformations can also be made and is changed
Enter, these belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended power
Profit requires to be defined.
Claims (9)
1. a kind of high-voltage wiring harness reliability checking method, it is characterised in that comprise the steps：
The dynamic current data by the high-voltage wiring harness in automobile circuit that acquisition is measured in vehicle traveling process
And surface temperature Tx of the high-voltage wiring harness；
Power supply and load are selected according to the dynamic current data, is set up according to the power supply and load and is tested back
Road；
The high-voltage wiring harness is arranged in the test loop, measures described before and after the test loop is powered
The core temperature changing value Δ Tx of high-voltage wiring harness；
According to the resistance to temperature value of surface temperature Tx, the core temperature changing value Δ Tx and the high-voltage wiring harness
T determines the reliability of the high-voltage wiring harness.
2. high-voltage wiring harness reliability checking method according to claim 1, it is characterised in that described to obtain
The dynamic current data by the high-voltage wiring harness in automobile circuit that measure in being taken at vehicle traveling process and described
The process of surface temperature Tx of high-voltage wiring harness includes：
The dynamic current value of the high-voltage wiring harness of Each point in time measurement is obtained, according to the dynamic current value
The current sequence of dynamic current data is obtained, the Each point in time is divided in referring to the vehicle traveling process
For multiple time points；
The surface temperature value of the high-voltage wiring harness of Each point in time measurement is obtained, according to the surface temperature value
Obtain the temperature sequence of surface temperature Tx.
3. high-voltage wiring harness reliability checking method according to claim 2, it is characterised in that described
The process for being worth to the current sequence of dynamic current data according to the dynamic current includes：
The dynamic current value for obtaining is measured according to the Each point in time obtains initial current sequence；
Calculate the current average of the initial current sequence；
Find out from the initial current sequence with the difference of the current average more than the first preset range value
Dynamic current peak value, remove the dynamic current peak value in the initial current sequence, obtain equivalent
Current sequence；
And also include after the process for obtaining the equivalent current sequence：
Dynamic current square-wave curve equivalent therewith is obtained according to the current sequence.
4. high-voltage wiring harness reliability checking method according to claim 2, it is characterised in that described
The process that temperature sequence is worth to according to the surface temperature includes：
The surface temperature value for obtaining is measured according to the Each point in time obtains initial temperature sequence；
Calculate the temperature averages of the initial temperature sequence；
Find out from the initial temperature sequence with the difference of the temperature averages more than the second preset range value
Surface temperature peak value, remove the surface temperature peak value in the initial temperature sequence, obtain equivalent
Temperature sequence.
5. the high-voltage wiring harness reliability checking method according to any one of Claims 1-4, its feature exist
In described according to the resistance to of surface temperature Tx, the core temperature changing value Δ Tx and the high-voltage wiring harness
The step of temperature value T determines the reliability of the high-voltage wiring harness includes：
By the T of resistance to temperature value of surface temperature Tx, the core temperature changing value Δ Tx and the high-voltage wiring harness
Judge in substituting into reliability detection relational expression whether the reliability detection relational expression is set up；Wherein, it is described can
By property detection relational expression it is：Tx+ΔTx≤T；
If the reliability detection relational expression is set up, the high-voltage wiring harness reliability is judged.
6. high-voltage wiring harness reliability checking method according to claim 1, it is characterised in that the vapour
Garage crosses journey to be included：
First runs over journey, gives it the gun to First Speed, and keeps the First Speed at the uniform velocity to travel first
Preset Time, decelerates to 0, stops the second Preset Time, further accelerates traveling to second speed, and keeps described
Second speed at the uniform velocity travels the 3rd Preset Time, decelerates to 0, stops the 4th Preset Time, further accelerates traveling extremely
Third speed, and keep the third speed at the uniform velocity to travel the 5th Preset Time, 0 is decelerated to, stops the 6th pre-
If the time；Cheng Xunhuan is run over according to described first and travels the first preset times；
Second traveling process, gives it the gun to fourth speed, and keeps the fourth speed at the uniform velocity to travel the 7th
Preset Time, then Reduced Speed Now is to the 5th speed, and keep the 5th speed at the uniform velocity travel the 8th it is default when
Between, further accelerate traveling to the 6th speed, and keep the 6th speed speed at the uniform velocity travel the 9th it is default when
Between, traveling is further accelerated to the 7th speed, and keep the 7th speed at the uniform velocity to travel the tenth Preset Time, then
Give it the gun to the 8th speed, and keep the 8th speed at the uniform velocity to travel the 11st Preset Time, then slow down
To 0；According to described second traveling process circulation the second preset times of traveling.
7. high-voltage wiring harness reliability checking method according to claim 6, it is characterised in that described
One speed is 15km/h, and the second speed is 40km/h, and the third speed is 50km/h；Described
One Preset Time is 10s, and second Preset Time is 30s, and the 3rd Preset Time is 30s, described the
Four Preset Times are 30s, and the 5th Preset Time is 20s, and the 6th Preset Time is 30S；It is described
First preset times are 4 times；
The fourth speed is 70km/h, and the 5th speed is 50km/h, and the 6th speed is 70km/h,
7th speed is 100km/h, and the 8th speed is 120km/h；7th Preset Time be 70s, institute
The 8th Preset Time is stated for 70s, the 9th Preset Time is 50s, the tenth Preset Time is 40s, institute
The 11st Preset Time is stated for 10s；Second preset times are 3 times.
8. a kind of high-voltage wiring harness reliability detecting device, it is characterised in that include：Current measuring device,
One temperature measuring equipment, power supply, load, second temperature measurement apparatus and high-voltage wiring harness to be measured；
The power supply, load and high-voltage wiring harness to be measured connect to form series loop by wire；
The current measuring device is for the measurement in vehicle traveling process by the high pressure to be measured in automobile circuit
The dynamic current data of wire harness；
First temperature measuring equipment is for the high pressure to be measured in the measurement automobile circuit in vehicle traveling process
Surface temperature Tx of wire harness；
The power supply and the load are made by the string for being adjusted according to the dynamic current data
The electric current in connection loop is consistent with the dynamic current data；
The second temperature measurement apparatus are used for measuring the core temperature of high-voltage wiring harness to be measured in the series loop
Degree；
The T of resistance to temperature value of surface temperature Tx, the core temperature and the high-voltage wiring harness to be measured is used for judging
The reliability of the high-voltage wiring harness to be measured.
9. high-voltage wiring harness reliability detecting device according to claim 8, it is characterised in that also include
Processor；The processor connects the first temperature measuring equipment and second temperature measurement apparatus respectively；
First temperature measuring equipment measures surface temperature Tx, and by surface temperature Tx send to
Processor；
The second temperature measurement apparatus measure the core temperature, and the core temperature is sent to process
Device；
The processor is used for calculating core temperature and the series loop in the series loop galvanization
The difference of the core temperature of energization initial time, obtains core temperature changing value Δ Tx；By surface temperature Tx,
The T of resistance to temperature value of the core temperature changing value Δ Tx and the high-voltage wiring harness to be measured substitutes into reliability detection and closes
It is to judge whether the reliability detection relational expression is set up in formula；If the reliability detection relational expression is set up,
Then judge the high-voltage wiring harness reliability to be measured；Wherein, the reliability detection relational expression is：Tx+ΔTx≤T.
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| CN201510583329.XA CN106526348B (en) | 2015-09-14 | 2015-09-14 | High-voltage wiring harness reliability checking method and device |
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Cited By (1)
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| CN107091947A (en) * | 2017-04-25 | 2017-08-25 | 重庆长安汽车股份有限公司 | Automotive wire bundle current testing device |
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|---|---|
| CN106526348B (en) | 2019-02-05 |
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