CN110320416A - The detection system and its fault detection method of vehicle and vehicle-mounted display terminal - Google Patents
The detection system and its fault detection method of vehicle and vehicle-mounted display terminal Download PDFInfo
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- CN110320416A CN110320416A CN201810277611.9A CN201810277611A CN110320416A CN 110320416 A CN110320416 A CN 110320416A CN 201810277611 A CN201810277611 A CN 201810277611A CN 110320416 A CN110320416 A CN 110320416A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
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Abstract
The invention discloses the detection systems and its fault detection method of vehicle and vehicle-mounted display terminal, wherein, the detection system includes detection device and processing unit, and detection device is used to detect the output voltage of the power conversion module of vehicle-mounted display terminal and detects the supply voltage of the electricity consumption module of vehicle-mounted display terminal；Output voltage and supply voltage are uploaded to cloud server for handling output voltage and supply voltage to store by processing unit.The voltage detecting value of vehicle-mounted display terminal is uploaded to cloud server, in the fault detection and maintenance of vehicle-mounted display terminal, can quickly provide data support, it is more rapidly and efficiently, time saving and energy saving.
Description
Technical field
The invention belongs to technical field of vehicle more particularly to a kind of detection systems of vehicle-mounted display terminal, and including being somebody's turn to do
The vehicle of detection system and the fault detection method of vehicle-mounted display terminal.
Background technique
With social economy's fast development, people are higher and higher to the functional requirement of vehicle mounted multimedia.It is pursued at this fast
In fast, efficient society, requirement of the people to working efficiency is higher and higher.Thus, vehicle multimedia developers are to oneself
The vehicle mounted multimedia product of exploitation, it has to more information are provided, so as to the maintenance and repair of vehicle.However, at present for
The maintenance of vehicle-mounted display terminal and fault detection approach need to be further improved.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, the detection system can an object of the present invention is to provide a kind of detection system of vehicle-mounted display terminal
With for vehicle-mounted display terminal maintenance and fault detection provide data support, more rapidly and efficiently.
An object of the present invention is to provide a kind of vehicles of detection system including the vehicle-mounted display terminal.
An object of the present invention is to provide a kind of fault detection methods of vehicle-mounted display terminal.
In order to achieve the above object, the detection system of the vehicle-mounted display terminal of first aspect present invention embodiment, comprising: inspection
Device is surveyed, the detection device is used to detect output voltage and the detection institute of the power conversion module of the vehicle-mounted display terminal
State the supply voltage of the electricity consumption module of vehicle-mounted display terminal；Processing unit, the processing unit be used for the output voltage and
The supply voltage is handled, and the output voltage and the supply voltage are uploaded to cloud server to store.
The detection system of vehicle-mounted display terminal according to an embodiment of the present invention detects vehicle-mounted display terminal by detection device
Voltage detecting value, which is uploaded to cloud server and stored by processing unit, is vehicle-mounted display terminal
Fault detection provide data support, conducive to improve vehicle-mounted display terminal detection and maintenance efficiency.
In order to achieve the above object, the vehicle of second aspect of the present invention embodiment, including vehicle-mounted display terminal and first party
The detection system of vehicle-mounted display terminal described in the embodiment of face.
Vehicle according to an embodiment of the present invention will by using the detection system of the vehicle-mounted display terminal of above example
The voltage detecting value of the modules of vehicle-mounted display terminal is uploaded to cloud, mentions for the fault diagnosis and maintenance of vehicle-mounted display terminal
It is supported for data, conducive to the maintenance efficiency for improving vehicle-mounted display terminal.
In order to achieve the above object, the fault detection side for the vehicle-mounted display terminal that third aspect present invention embodiment proposes
Method, comprising: obtain the voltage detecting value of the vehicle-mounted display terminal of cloud server storage, the voltage detecting value includes electricity
The output voltage of source conversion module and the supply voltage of electricity consumption module；Judge the voltage detecting value and standard voltage value whether one
It causes；Determine that the respective modules of the vehicle-mounted display terminal are sent out if the voltage detecting value and the standard voltage value are inconsistent
Raw failure.
The fault detection method of vehicle-mounted display terminal according to an embodiment of the present invention, by reading cloud server storage
The voltage detecting value of vehicle-mounted display terminal, which is compared with standard value can positioning failure module, more
Rapidly and efficiently, time saving and energy saving.
Detailed description of the invention
Fig. 1 is the block diagram of the detection system of vehicle-mounted display terminal according to an embodiment of the present invention；
Fig. 2 is the block diagram of the detection system of vehicle-mounted display terminal according to an embodiment of the invention；
Fig. 3 is the schematic diagram of logic selector according to an embodiment of the invention；
Fig. 4 is the function table for the data channel selection of the logic selector of Fig. 3；
Fig. 5 is the block diagram of the detection system of vehicle-mounted display terminal according to an embodiment of the invention；
Fig. 6 is the output voltage of the first power conversion module of vehicle-mounted display terminal according to an embodiment of the invention
Detection circuit schematic diagram；
Fig. 7 is that the supply voltage detection circuit of the processor of vehicle-mounted display terminal according to an embodiment of the invention is shown
It is intended to；
Fig. 8 is the TEC/ fan supply voltage detection circuit of vehicle-mounted display terminal according to an embodiment of the invention
Schematic diagram；
Fig. 9 is the output voltage of the second source conversion module of vehicle-mounted display terminal according to an embodiment of the invention
Detection circuit schematic diagram；
Figure 10 is the LCD supply voltage detection circuit signal of vehicle-mounted display terminal according to an embodiment of the invention
Figure；
Figure 11 is the output electricity of the third power conversion module of vehicle-mounted display terminal according to an embodiment of the invention
Press detection circuit schematic diagram；
Figure 12 is the block diagram of vehicle according to an embodiment of the present invention；
Figure 13 is the flow chart of the fault detection method of vehicle-mounted display terminal according to an embodiment of the present invention；
Figure 14 is the schematic diagram of the voltage detecting process of vehicle-mounted display terminal according to an embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The detection system of the vehicle-mounted display terminal of embodiment according to a first aspect of the present invention is described with reference to the accompanying drawings.
Fig. 1 is the functional block diagram of the detection system of vehicle-mounted display terminal according to an embodiment of the present invention, as shown in Figure 1, this
The detection system 100 of inventive embodiments includes detection device 10 and processing unit 20.
Wherein, detection device 10 is used to detect the output voltage and detection vehicle of the power conversion module of vehicle-mounted display terminal
Carry the supply voltage of the electricity consumption module of display terminal.In some embodiments of the invention, vehicle-mounted display terminal for example can wrap
Mobile phone, tablet computer or other applicable electronic products with display screen are included, vehicle-mounted display terminal includes multiple electricity consumption modules
Such as display module, processor, fan or refrigerator etc., the supply voltage of multiple electricity consumption modules is often different, thus can also set
Multiple power conversion modules are set, to convert input voltage into electricity consumption module applicable voltage range such as 5V, 1.8V or 12V
Deng.
The output voltage for the power conversion module that processing unit 20 is used to detect detection device 10 and detection are vehicle-mounted aobvious
Show that the supply voltage of the electricity consumption module of terminal is handled, such as voltage detecting value is converted to the data format that can be transmitted, and
The output voltage and supply voltage are uploaded to cloud server to store, such as cloud is uploaded by data traffic.
In an embodiment of the present invention, cloud server side establishes database before data upload, which is used for
The received voltage detecting value to vehicle-mounted display terminal is saved, in vehicle-mounted display terminal such as PAD (portable
Android device, tablet computer) when breaking down, maintenance personal can be read by terminal from cloud server vehicle-mounted aobvious
The voltage detecting value for showing terminal side, voltage by checking which module is abnormal can to quickly locate the mould to go wrong
Block greatlys improve diagnosis and maintenance efficiency.
The detection system 100 of vehicle-mounted display terminal according to an embodiment of the present invention is detected vehicle-mounted aobvious by detection device 10
Show that the voltage detecting value is uploaded to cloud server and stored by the voltage detecting value of terminal, processing unit 20, is vehicle-mounted aobvious
Show that the fault detection of terminal provides data and supports, conducive to the detection and maintenance efficiency for improving vehicle-mounted display terminal.
In some embodiments of the invention, as described in Figure 2, the detection system 100 of the embodiment of the present invention further includes logic
Selector 30, logic selector 30 include selection control port and DDC port, DDC port and detection device phase
Even, control port is selected to be connected with processing unit 20.Specifically, processing unit 20 passes through the incoming level to selection control port
Height control can choose the output of the DDC port of logic selector 30, realize the different voltages to detection device 10
The acquisition of detected value.
In some embodiments, as described in Figure 2, the processing unit 20 of the embodiment of the present invention includes 21 He of micro-control module
CPU (Central Processing Unit, central processing unit) module 22, micro-control module 21 are connected with selection control port,
The data of data channel for control logic selector 30 export, and defeated according to selection control signal acquisition corresponding data channel
Voltage detecting value out；CPU module 22 is connected with micro-control module 21, for handle and examine voltage to voltage detecting value
Measured value is uploaded to cloud server.
As an example, as shown in figure 3, the logic selector 30 of the embodiment of the present invention can be MC74HC4051A-D logic
Selector, this logic selector are the patch chips for being encapsulated as SIOC16 pin, and pin definitions are also fairly simple, one
VCC power pin, an enable pin, A, B, C are three selection control ports and X0-X7 is eight data tunnel ends
Mouthful.A, the level of B, C tri- selection control ports constitutes 23Kind selection mode, is illustrated in figure 4 the function of MC74HC4051A
Select table, it can be seen that when enable be in low level it is effective when, tri- selection control ports of A, B, C in just it is different
When state, logic selector 30 will select different channels, be allowed to be transferred to micro-control module 21.Such as shown in Fig. 5, when
A, when B, C L, L, L, the voltage value of MC74HC4051A selector selection data channel X0 is transmitted to micro-control module 21, and its
The value of his data channel is not delivered to micro-control module 21.For another example selecting control port for L, L, H when A, B, C tri-
When, the voltage value of MC74HC4051A selector selection data channel X1 is transmitted to micro-control module 21, and other data channel
Value is not transmitted to micro-control module 21.And so on logic selector 30 can be selected according to the different state of A, B, C it is different
The value of data channel transfers out.In fact, three or eight namely common logic selectors of the logic selector 30.
The selection of logic selector 30 is only exemplary above, naturally it is also possible to select other chips applicatory
To realize identity function.
The voltage detecting of power conversion module to the vehicle-mounted display terminal of the embodiment of the present invention and electricity consumption module below
Realization process further illustrates.
In embodiments of the present invention, the power supply of the difference electric device of vehicle-mounted display terminal is often different, thus can set
Multiple power conversion modules are set to provide the different power supplies with electric device.For example, the power conversion module packet of vehicle-mounted display terminal
Include the first power conversion module.As shown in figure 5, detection device 10 includes the first detection circuit 11, the inspection of the first detection circuit 11
It surveys end to be connected with the voltage output end of the first power conversion module of vehicle-mounted display terminal, the first output of the first detection circuit 11
End is connected with the first DDC port such as X0 of logic selector 30, and the first detection circuit 11 turns for detecting the first power supply
Change the mold the output voltage of block.
As an example, as shown in fig. 6, the detection of the T_VCC_5V voltage to PAD, the first detection circuit 11 are used to detect
VCC_5V, that is, T_VCC_5V voltage of the LT8640 power conversion chip output of PAD, it is maximum that LT8640 chip can export 5A
Continuous current and 7A peak transient export electric current.First detection circuit 11 includes first resistor R1 and second resistance R2, the first electricity
One end of resistance R1 is connected with the voltage output end of the first power conversion module T1, the other end and second resistance R2 of first resistor R1
One end be connected, the other end of second resistance R2 is connected with ground terminal, one end of the other end of first resistor R1 and second resistance R2
Between there is the first output end, the first output end is connected with the first DDC port such as X0 of logic selector 30.In other words,
Upper two resistance in parallel at the output voltage of the first power conversion module T1, sampled voltage o'clock is among two resistance, such as Fig. 3
It is shown, the channel X0 of MC74HC4051A-D logic selector can be attached directly to by single line beam, it can be required sampling
Voltage value is transmitted to the port of logic selector 30, so as to the reading of micro-control module 21.Herein, the electricity of first resistor R1 and second
The resistance value of resistance R2 can all select 100K, select the resistance of big resistance value that can lower electric current so as to reduce unnecessary function
Consumption.Due to two resistance resistance value all, so, voltage detecting value be power supply chip output valve half, LT8640 power supply
The output valve of chip is 5V, and therefore, the voltage detecting value sampled is 2.5V.
In some embodiments, the electricity consumption module of vehicle-mounted display terminal includes processor, as shown in figure 5, detection device 10
It can also include the second detection circuit 12, the power supply of the processor of the test side and vehicle-mounted display terminal of the second detection circuit 12 is defeated
Enter end to be connected, the second output terminal and the second DDC port such as X1 phase of logic selector 30 of the second detection circuit 12
Even, the second detection circuit 12 is used for the supply voltage of measurement processor.Processor is the electricity consumption module of vehicle-mounted display terminal, if
Processor cisco unity malfunction may determine that whether its power supply is normal, detects with assist trouble by its supply voltage.
In some embodiments of the invention, the energization input of processor and the voltage of the first power conversion module T1 are defeated
Outlet is connected, and in other words, the processor of vehicle-mounted display terminal is powered by the output voltage all the way of the first power conversion module T1.
As an example, as shown in fig. 7, be for example denoted as T_MSM_4V2 for the supply voltage of the processor of PAD, by
LT8640 power conversion chip T1 generate voltage, but herein power conversion chip generate voltage be not VCC_5V but
4.2V, this 4.2V voltage are processor power supply.The connection of the power supply circuit of processor and the power supply of LT8640 power conversion chip
The connection of output circuit is the same, the difference is that the configuration of setting voltage output is different, that be allowed to export is 4.2V rather than 5V.
In an embodiment of the present invention, the second detection circuit 12 includes 3rd resistor R3 and the 4th resistance R4, one end of 3rd resistor R3
It is connected with the energization input of processor, the other end of 3rd resistor R3 is connected with one end of the 4th resistance R4, the 4th resistance R4
The other end be connected with ground terminal, there is second output terminal between the other end of 3rd resistor R3 and one end of the 4th resistance R4, the
Two output ends are connected with the second DDC port such as X1 of logic selector 30.
Specifically, the equal series resistance of two resistance values is connected in power output end, the resistance value of two resistance can be selected all
100K is selected, to reduce electric current to reduce power consumption.Voltage sample point is accessed among 3rd resistor R3 and the 4th resistance R4, is carried out
Half pressure adopts pressure detection, as shown in figure 3, the other end for adopting pressure point can be attached directly to MC74HC4051A-D logic selector
The channel X1, so that whether just micro-control module 21 reads voltage, that is, processor supply voltage of power conversion chip output
Often.Because the voltage value of power conversion chip output is 4.2V, and what is selected is half pressure sample mode, so being transferred to
The voltage value in the channel MC74HC4051A-D logic selector X1 is 2.1V, and only micro-control module 21 detects that this data is logical
Just show that the power supply of processor is normal when the value in road is 2.1V.
In some embodiments of the invention, the electricity consumption module of vehicle-mounted display terminal can also include refrigerating module, such as Fig. 5
Shown, detection device 10 further includes third detection circuit 13, the test side of third detection circuit 13 and vehicle-mounted display terminal it is cold
But the output end of the power supply circuit of module is connected, the third output end of third detection circuit 13 and the third number of logic selector 30
It is connected according to access port such as X2, third detection circuit 13 is used to detect the supply voltage of refrigerating module.Refrigerating module such as wind
Fan or refrigerator are that the electricity consumption module of vehicle-mounted display terminal can by its supply voltage if refrigerating module cisco unity malfunction
To judge whether its power supply is normal, detects with assist trouble.
In some embodiments, the voltage output end phase of the energization input of refrigerating module and the first power conversion module T1
Even.In other words, the refrigerating module of vehicle-mounted display terminal is powered by the output voltage all the way of the first power conversion module T1.
As an example, as shown in figure 8, be for example denoted as T_FAN+ for the supply voltage of the TEC/ fan of PAD, be by
What the VCC_5V that LT8640 power conversion chip T1 is generated was provided, it does not convert by any power supply chip, also shows in figure
The driving circuit 01 and other connection circuits 02 of refrigerator are gone out.Third detection circuit 13 includes the 5th resistance R5 and the 6th resistance
The output end of the power supply circuit 131 of one end and refrigerating module of R6, the 5th resistance R5 is connected, the other end of the 5th resistance R5 and
One end of six resistance R6 is connected, and the other end of the 6th resistance R6 is connected with ground terminal, the other end and the 6th resistance of the 5th resistance R5
There is third output end between one end of R6.I.e. in two the 5th resistance R5 of divider resistance of port parallel connection to power to TEC/ fan
With the 6th resistance R6, corresponding resistance value is 100K and 10K, and voltage sample point is located to the centre of two resistance, voltage sample point
Voltage V=5V*R0547/ (R5+R6), about 0.455V, as shown in figure 4, voltage sample point can be connected to by harness
The channel MC74HC4051A-D logic selector X2 powers in order to which cloud is read by micro-control module 21 to TEC/ fan
Voltage it is whether normal.
In some embodiments of the invention, the power conversion module of vehicle-mounted display terminal can also turn including second source
Change the mold block, the output voltage of second source conversion module less than the first power conversion module output voltage, as shown in figure 5, inspection
Surveying device 10 further includes the 4th detection circuit 14, and the test side of the 4th detection circuit 14 and the second source of vehicle-mounted display terminal turn
The voltage output end for changing the mold block is connected, the 4th output end of the 4th detection circuit 14 and the 4th data channel of logic selector 30
Port such as X3 is connected, and the 4th detection circuit 14 is used to detect the output voltage of second source conversion module T2.
As an example, as shown in figure 9, for PAD power conversion chip TPS73601 output VDD_1V8 detection,
The exportable current range of TPS73601 is 400mA to 800mA, and voltage output range is up to 1.2V to 5.5V, main selection here
Output voltage is 1.8V, and the encapsulation of TPS73601 simply only has 5 pins very much, is a very simple and effective power supply conversion core
Piece.In embodiments of the present invention, as shown in figure 9, the 4th detection circuit 14 includes the 7th resistance R7 and the 8th resistance R8, the 7th electricity
One end of resistance R7 is connected with the voltage output end of second source conversion module T2 such as TPS73601, the other end of the 7th resistance R7
It is connected with one end of the 8th resistance R8, the other end of the 8th resistance R8 is connected with ground terminal, the other end and the 8th of the 7th resistance R7
There is the 4th output end, the 4th DDC port of the 4th output end and logic selector 30 is for example between one end of resistance R8
X3 is connected.In other words, two resistance of parallel connection are on the port of the output 1.8V of second source conversion module T2 such as TPS73601
7th resistance R7 and the 8th resistance R8 can be using half pressure sampling in order to facilitate calculating since the voltage value of output end is smaller
Mode, that is, use two resistance of similar resistance, so, the voltage of voltage sample point is the half of the voltage value of output end,
As shown in figure 3, voltage sample point i.e. the 4th output end can be directly connected to MC74HC4051A-D logic selector by harness
The channel X3.Cloud can read the output voltage of second source conversion module T2 by micro-control module 21, in order to carry out
Failure auxiliary detection.
In some embodiments of the invention, the electricity consumption module of vehicle-mounted display terminal includes display module, as shown in figure 5,
Detection device 10 can also include the 5th detection circuit 15, the test side of the 5th detection circuit 15 and the display of vehicle-mounted display terminal
The output end of the power supply circuit of module is connected, the 5th output end of the 5th detection circuit 15 and the 5th data of logic selector 30
Access port such as X4 is connected, and the 5th detection circuit 15 is used to detect the supply voltage of display module.Display module is vehicle-mounted aobvious
Show the electricity consumption module of terminal, if display module cisco unity malfunction, whether just its power supply may determine that by its supply voltage
Often, it is detected with assist trouble.
As an example, as shown in Figure 10, being supplied for the LCD (Liquid Crystal Display, liquid crystal display) of PAD
The detection of piezoelectric voltage since the voltage powered to LCD is relatively high, such as is denoted as T_LCD_12V, if be directly connected to
The channel X4 of MC74HC4051A-D logic selector may burn out logic selector, it is therefore desirable to pass through electric resistance partial pressure
Mode, the voltage adopted is dropped within safe voltage range.In an embodiment of the present invention, the 5th detection circuit 15
Including the 9th resistance R9 and the tenth resistance R10, the output end phase of the power supply circuit 151 of one end and display module of the 9th resistance R9
Even, the other end of the 9th resistance R9 is connected with one end of the tenth resistance R10, and the other end of the tenth resistance R10 is connected with ground terminal, the
There is the 5th output end, the detection of the 5th output end output voltage between the other end of nine resistance R9 and one end of the tenth resistance R10
Value T_LCD_12V, the 5th output end are connected with the 5th DDC port such as X4 of logic selector 30, also show in figure
The driving circuit 03 of LCD.In other words, in the supply voltage port of display module parallel connection two series resistances i.e. the 9th resistance R9 and
Ten resistance R10, the resistance value of two resistance are 100K and 10K respectively, and similarly, voltage sample point is located in two resistance
Between, in this way, the voltage of voltage sample point is V=12V*R10/ (R9+R10), as shown in figure 3, voltage can be adopted by harness
Sampling point is connected to the channel X4 of MC74HC4051A-D logic selector, and when voltage sample, logic selector 30 can be by the data
The voltage detecting value in channel is transmitted to micro-control module 21, thus, cloud can be read by micro-control module 21 to power to LCD
Voltage it is whether normal.
In some embodiments of the invention, the power conversion module of vehicle-mounted display terminal can also include that third power supply turns
Block is changed the mold, third power conversion module is for converting input voltage into the output of two-way different voltages value, third power supply modulus of conversion
The output voltage all the way of block less than the first power conversion module output voltage and be greater than second source conversion module output electricity
Pressure.As shown in figure 5, the detection device 10 of the embodiment of the present invention includes the 6th detection circuit 16, the detection of the 6th detection circuit 16
End is connected with the voltage output end of the output voltage all the way of the third power conversion module of vehicle-mounted display terminal, the 6th detection circuit
16 the 6th output end is connected with the 6th DDC port such as X5 of logic selector 30, and the 6th detection circuit 16 is for examining
Survey the output voltage of third power conversion module.
As an example, as shown in figure 11, exporting the voltage of VCC_3V3 for the TPS54386 power conversion chip of PAD
Detection.TPS54386 power conversion chip has two-way power supply to convert road, it can input voltage is converted into two different electricity
The circuit of pressure value need to only detect VCC_3V3 herein.In an embodiment of the present invention, the 6th detection circuit 16 includes the
One end of 11 resistance R11 and twelfth resistor R12, eleventh resistor R11 and third power conversion module are for example
The voltage output end of T3TPS54386 power conversion chip is connected, and the other end of eleventh resistor R11 is with twelfth resistor R12's
One end is connected, and the other end of twelfth resistor R12 is connected with ground terminal, the other end and twelfth resistor R12 of eleventh resistor R11
One end between have the 6th output end, the 6th DDC port such as X5 phase of the 6th output end and logic selector 30
Even.In other words, in the output end of TPS54386 two resistance being cascaded i.e. eleventh resistor R11 and twelfth resistor in parallel
R12, the resistance value of two resistance can be 10K, in such a way that half pressure adopts pressure, as shown in figure 3, can be by voltage sample point
It is connected to the channel X5 of MC74HC4051A-D logic selector by harness, realizes cloud by micro-control module 21 to voltage
The voltage value of conversion chip is read out, and may determine that whether the power supply of third power conversion module is normal by the voltage value,
It realizes and the assist trouble of third power conversion module is detected.
Above by taking the voltage detecting of the circuit of PAD as an example, gives six road voltage values and be respectively as follows: T_VCC_5V, T_MSM_
4V2, T_FAN+, T_VDD_1V8, T_LCD_12V and T_VCC_3V3.The sampled voltage of T_VCC_5V is 2.5V, T_MSM_4V2
Sampled voltage be 2.1V, the sampled voltage of T_FAN+ is 0.455V, and the sampled voltage of T_VDD_1V8 is 0.9V, T_LCD_12V
Sampled voltage be 1.09V, the sampled voltage of T_VCC_3V3 is 1.65V.Wherein, the sampled value of not all voltage is all
It is the half of the value of output voltage or supply voltage.Because the pin voltage maximum value of MC74HC4051A-D logic selector is only
It can be VCC, can be more than that VCC voltage thus MC74HC4051A-D can be patrolled if the voltage value of LCD is also that half pressure is taken to sample
Selector is collected to damage, so, in an embodiment of the present invention by selecting suitable electric resistance partial pressure ratio, Lai Jinhang voltage
Sampling.
In short, detection device 10 is by way of voltage, naturally it is also possible to other modes applicatory are used,
The voltage step-down of modules power supply will be given to suitable voltage, and voltage detecting value is given to MC74HC4051A-D logic
Selector, micro-control module 21 is by reading the voltage value on MC74HC4051A-D logic selector pin, by controlling to selection
The control of port processed, the value that can only be read in logic selector 30 every time are then communicated to CPU module 22, CPU module 22
Voltage acquisition value is formatted again and transmission process is given to cloud, has correspondence beyond the clouds per voltage detecting value all the way
Standard value compare therewith.Each voltage value of whole logic selectors 30 is read by circulation and uploads cloud to store,
When vehicle-mounted display terminal failure, the voltage detecting value of the modules by reading cloud storage, it can be determined that modules
Whether voltage is normal.Once the voltage of which module notes abnormalities, it is easy to judgement is which module there is a problem, thus and
When quickly PAD is repaired.
To sum up, the detection system 100 of the vehicle-mounted display terminal of the embodiment of the present invention, by by vehicle-mounted display terminal
The voltage detecting value of power conversion module and electricity consumption module is uploaded to cloud server, be vehicle-mounted display terminal fault diagnosis and
Maintenance provides data and supports.In vehicle-mounted display terminal failure, cloud can be read by installing APP in terminal, such as mobile phone
The voltage detecting value of the correlation module of the vehicle-mounted display terminal of preservation, by judging whether voltage detecting value quickly locates extremely
Malfunctioning module to reduce the range of fault diagnosis, and then can quickly judge failure cause and repair, and improve vehicle-mounted
Display terminal event often diagnoses and the efficiency of maintenance.
The detection system of vehicle-mounted display terminal based on above-mentioned aspect embodiment, describes according to the present invention with reference to the accompanying drawings
The vehicle of second aspect embodiment.
Figure 12 is the block diagram of vehicle according to an embodiment of the present invention, as shown in figure 12, the vehicle 1000 of the embodiment of the present invention
The detection system 100 and vehicle-mounted display terminal 200 of vehicle-mounted display terminal including above example, further include other vehicles certainly
Indispensable component and system, is no longer described in detail one by one herein.
The vehicle 1000 of the embodiment of the present invention, by using the detection system 100 of the vehicle-mounted display terminal of above example,
The voltage detecting value of the modules of vehicle-mounted display terminal is uploaded to cloud, is the fault diagnosis and maintenance of vehicle-mounted display terminal
It provides data to support, conducive to the maintenance efficiency for improving vehicle-mounted display terminal.
The fault detection method of the vehicle-mounted display terminal of embodiment according to a third aspect of the present invention is described with reference to the accompanying drawings.
Figure 13 is the flow chart of the fault detection method of vehicle-mounted display terminal according to an embodiment of the present invention, such as Figure 13 institute
Show, the fault detection method of the vehicle-mounted display terminal of the embodiment of the present invention includes:
S1 obtains the voltage detecting value of the vehicle-mounted display terminal of cloud server storage, wherein voltage detecting value includes electricity
The output voltage of source conversion module and the supply voltage of electricity consumption module.
S2 judges whether voltage detecting value is consistent with standard voltage value.
S3 determines that event occurs for the respective modules of vehicle-mounted display terminal if voltage detecting value and standard voltage value are inconsistent
Barrier.
Specifically, cloud server can read vehicle complete vehicle information, the maintenance record including vehicle, vehicle condition,
Remote control key etc..Information of vehicles needed for vehicle can be put on network by cloud server, keep car owner in office
When between, any place, use different information technoloy equipment to be connected with each other, realize data access, operation.Cloud service greatly facilitates
The understanding of car owner and maintenance personal to vehicle status and maintenance record, to be more easier to vehicle maintenance and maintenance.Cloud
It services relevant function and needs long-range connection network function, such as is navigation real time status, application shop, voice customer service, online new
It hears, fleet's group's management, position sharing, of courses also vehicle remote more new system.But it is vehicle-mounted aobvious there is presently no being directed to
Show the cloud service of the auxiliary maintaining of terminal, thus, the fault detection method of the embodiment of the present invention, by reading cloud storage
Voltage detecting values of the power supply conversion chip of vehicle-mounted display terminal and other power supplies, judge the exception of voltage detecting value with
It is no, to realize auxiliary maintaining and fault diagnosis functions to vehicle-mounted display terminal.
As shown in figure 14 for according to the signal of the voltage detecting process of the vehicle-mounted display terminal of one embodiment of the present of invention
Figure, by taking PAD as an example, voltage detecting value includes the confession of the output voltage LT8640T_VCC_5, processor of the first power conversion module
Piezoelectric voltage LT8640T_MSM_4V2, TEC/ fan power supply, second source conversion module output voltage TPS73601T_VDD_
The output voltage TPS54386T_VCC_3V3 of 1V8, LCD power supply T_LCD_12V and third power conversion module.
When PAD normal boot-strap, the voltage value respectively detected will be transmitted to logic selector by six alignment detection circuits
Corresponding data channel, micro-control module issue the high low state of A, B, C selection control port of order control logic selector,
It is allowed to select to read the value of data channel output every time, is recycled to the value of the output of data channel needed for having read.Microcontroller
The voltage detecting value for each voltage sample point that it reads is sent to CPU module again by module, and CPU module again detects these
The voltage detecting value arrived upload value cloud by way of data traffic.Database is established for protecting in cloud before data upload
The voltage detecting value of CPU module upload is deposited, and the voltage when standard voltage value for prestoring the modules of PAD works normally
Value.When vehicle-mounted PAD breaks down, for example, when the display screen of PAD cannot be shown, maintenance personal can by cell phone application or
Other terminals read the voltage detecting value at the end PAD that it is stored from cloud, by checking which electric voltage exception, such as display screen
Supply voltage is abnormal, can quickly navigate to the module to go wrong, greatly improve maintenance efficiency.
The fault detection method of vehicle-mounted display terminal according to an embodiment of the present invention, by reading cloud server storage
The voltage detecting value of vehicle-mounted display terminal, which is compared with standard value can positioning failure module, more
Rapidly and efficiently, it no longer needs to carry out measurement one by one with voltage of the voltage detector to each circuit module, it is time saving and energy saving.
It should be noted that in the description of this specification, any mistake described otherwise above in flow chart or herein
Journey or method description are construed as, and expression includes the steps that one or more for realizing specific logical function or process
Executable instruction code module, segment or part, and the range of the preferred embodiment of the present invention includes other
Realize, wherein sequence shown or discussed can not be pressed, including according to related function by it is basic simultaneously in the way of or press
Opposite sequence, Lai Zhihang function, this should be understood by the embodiment of the present invention person of ordinary skill in the field.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction
The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass
Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment
It sets.The more specific example (non-exhaustive list) of computer-readable medium include the following: there is the electricity of one or more wirings
Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (19)
1. a kind of detection system of vehicle-mounted display terminal, which is characterized in that the detection system includes:
Detection device, the detection device be used for detect the vehicle-mounted display terminal power conversion module output voltage and
Detect the supply voltage of the electricity consumption module of the vehicle-mounted display terminal；
Processing unit, the processing unit are used to handle the output voltage and the supply voltage, and will be described defeated
Voltage and the supply voltage are uploaded to cloud server to store out.
2. the detection system of vehicle-mounted display terminal as described in claim 1, which is characterized in that the detection system further include:
Logic selector, the logic selector include selection control port and DDC port, the DDC port
It is connected with the detection device, the selection control port is connected with the processing unit.
3. the detection system of vehicle-mounted display terminal as claimed in claim 2, which is characterized in that the processing unit includes:
Micro-control module, the micro-control module is connected with the selection control port, for controlling the logic selector
The data of data channel export, and according to the voltage detecting value of selection control signal acquisition corresponding data channel output；
CPU module, the CPU module are connected with the micro-control module, for being handled the voltage detecting value and being incited somebody to action
The voltage detecting value is uploaded to the cloud server to store.
4. the detection system of vehicle-mounted display terminal as claimed in claim 2 or claim 3, which is characterized in that
The power conversion module of the vehicle-mounted display terminal includes the first power conversion module；
The detection device includes the first detection circuit, the test side of first detection circuit and the first power supply modulus of conversion
The voltage output end of block is connected, the first data channel of the first output end of first detection circuit and the logic selector
Port is connected, and first detection circuit is used to detect the output voltage of first power conversion module.
5. the detection system of vehicle-mounted display terminal as claimed in claim 4, which is characterized in that
First detection circuit includes first resistor and second resistance, and one end of the first resistor and first power supply turn
The voltage output end for changing the mold block is connected, and the other end of the first resistor is connected with one end of the second resistance, and described second
The other end of resistance is connected with ground terminal, has described the between the other end of the first resistor and one end of the second resistance
One output end.
6. the detection system of vehicle-mounted display terminal as claimed in claim 4, which is characterized in that
The electricity consumption module of the vehicle-mounted display terminal includes processor；
The detection device further includes the second detection circuit, the test side of second detection circuit and the power supply of the processor
Input terminal is connected, the second DDC port phase of the second output terminal of second detection circuit and the logic selector
Even, second detection circuit is used to detect the supply voltage of the processor.
7. the detection system of vehicle-mounted display terminal as claimed in claim 6, which is characterized in that the supply input of the processor
End is connected with the voltage output end of first power conversion module.
8. the detection system of vehicle-mounted display terminal as claimed in claim 6, which is characterized in that
Second detection circuit includes 3rd resistor and the 4th resistance, the confession of one end of the 3rd resistor and the processor
Electrical input be connected, the other end of the 3rd resistor is connected with one end of the 4th resistance, the 4th resistance it is another
End is connected with ground terminal, has the second output terminal between the other end of the 3rd resistor and one end of the 4th resistance.
9. the detection system of vehicle-mounted display terminal as claimed in claim 4, which is characterized in that
The electricity consumption module of the vehicle-mounted display terminal includes refrigerating module；
The detection device includes third detection circuit, the test side of the third detection circuit and the power supply of the refrigerating module
The output end of circuit is connected, the third data channel end of the third output end of the third detection circuit and the logic selector
Mouth is connected, and the third detection circuit is used to detect the supply voltage of the refrigerating module.
10. the detection system of vehicle-mounted display terminal as claimed in claim 9, which is characterized in that the power supply of the refrigerating module
Input terminal is connected with the voltage output end of first power conversion module.
11. the detection system of vehicle-mounted display terminal as claimed in claim 9, which is characterized in that
The third detection circuit includes the 5th resistance and the 6th resistance, one end and the refrigerating module of the 5th resistance
The output end of power supply circuit is connected, and the other end of the 5th resistance is connected with one end of the 6th resistance, the 6th electricity
The other end of resistance is connected with ground terminal, has the third between the other end of the 5th resistance and one end of the 6th resistance
Output end.
12. the detection system of vehicle-mounted display terminal as claimed in claim 4, which is characterized in that
The power conversion module of the vehicle-mounted display terminal further includes second source conversion module, the second source conversion module
Output voltage be less than first power conversion module output voltage；
The detection device includes the 4th detection circuit, the test side of the 4th detection circuit and the second source modulus of conversion
The voltage output end of block is connected, the 4th output end of the 4th detection circuit and the 4th data channel of the logic selector
Port is connected, and the 4th detection circuit is used to detect the output voltage of the second source conversion module.
13. the detection system of vehicle-mounted display terminal as claimed in claim 12, which is characterized in that
4th detection circuit includes the 7th resistance and the 8th resistance, and one end of the 7th resistance and the second source turn
The voltage output end for changing the mold block is connected, and the other end of the 7th resistance is connected with one end of the 8th resistance, and the described 8th
The other end of resistance is connected with ground terminal, has described the between the other end of the 7th resistance and one end of the 8th resistance
Four output ends.
14. the detection system of vehicle-mounted display terminal as claimed in claim 2 or claim 3, which is characterized in that
The electricity consumption module of the vehicle-mounted display terminal includes display module；
The detection device includes the 5th detection circuit, the test side of the 5th detection circuit and the power supply of the display module
The output end of circuit is connected, the 5th output end of the 5th detection circuit and the 5th data channel end of the logic selector
Mouth is connected, and the 5th detection circuit is used to detect the supply voltage of the display module.
15. the detection system of vehicle-mounted display terminal as claimed in claim 14, which is characterized in that
5th detection circuit includes the 9th resistance and the tenth resistance, one end and the display module of the 9th resistance
The output end of power supply circuit is connected, and the other end of the 9th resistance is connected with one end of the tenth resistance, the tenth electricity
The other end of resistance is connected with ground terminal, has the described 5th between the other end of the 9th resistance and one end of the tenth resistance
Output end.
16. the detection system of the vehicle-mounted display terminal as described in power woods requires 12, which is characterized in that
The power conversion module of the vehicle-mounted display terminal further includes third power conversion module, the third power conversion module
For converting input voltage into the output of two-way different voltages value, the output voltage all the way of the third power conversion module is less than
The output voltage of first power conversion module and the output voltage for being greater than the second source conversion module；
The detection device includes the 6th detection circuit, the test side of the 6th detection circuit and the third power supply modulus of conversion
The voltage output end of the output voltage all the way of block is connected, the 6th output end and the logic selector of the 6th detection circuit
The 6th DDC port be connected, the 6th detection circuit be used for detect the third power conversion module output electricity
Pressure.
17. the detection system of vehicle-mounted display terminal as claimed in claim 16, which is characterized in that
6th detection circuit includes eleventh resistor and twelfth resistor, one end of the eleventh resistor and the third
The voltage output end of power conversion module is connected, one end phase of the other end of the eleventh resistor and the twelfth resistor
Even, the other end of the twelfth resistor is connected with ground terminal, the other end of the eleventh resistor and the twelfth resistor
There is the 6th output end between one end.
18. a kind of vehicle, which is characterized in that the vehicle includes vehicle-mounted display terminal and you require any one of 1-17 institute such as right
The detection system for the vehicle-mounted display terminal stated.
19. a kind of fault detection method of vehicle-mounted display terminal characterized by comprising
The voltage detecting value of the vehicle-mounted display terminal of cloud server storage is obtained, the voltage detecting value includes that power supply turns
Change the mold the output voltage of block and the supply voltage of electricity consumption module；
Judge whether the voltage detecting value and standard voltage value are consistent；
The respective modules of the vehicle-mounted display terminal are determined if the voltage detecting value and the standard voltage value are inconsistent
It breaks down.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810277611.9A CN110320416A (en) | 2018-03-30 | 2018-03-30 | The detection system and its fault detection method of vehicle and vehicle-mounted display terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810277611.9A CN110320416A (en) | 2018-03-30 | 2018-03-30 | The detection system and its fault detection method of vehicle and vehicle-mounted display terminal |
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| CN110320416A true CN110320416A (en) | 2019-10-11 |
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| CN102752360A (en) * | 2012-03-01 | 2012-10-24 | 浙江吉利汽车研究院有限公司 | Automobile failure detection system based on cloud calculation |
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