CN108710046A - A kind of onboard instruments durable test device - Google Patents
A kind of onboard instruments durable test device Download PDFInfo
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- CN108710046A CN108710046A CN201810742767.XA CN201810742767A CN108710046A CN 108710046 A CN108710046 A CN 108710046A CN 201810742767 A CN201810742767 A CN 201810742767A CN 108710046 A CN108710046 A CN 108710046A
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- 238000012360 testing method Methods 0.000 title claims abstract description 104
- 238000004891 communication Methods 0.000 claims abstract description 36
- 238000005070 sampling Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 8
- 238000013461 design Methods 0.000 abstract description 3
- 238000007796 conventional method Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 10
- 230000001413 cellular effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
- G01R31/007—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks using microprocessors or computers
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
A kind of onboard instruments durable test device,Replace in conventional method by using cheap test cell and communication unit and is worth bigger multimeter and communication tool,And test cell and communication unit are integrated into board form and are inserted in 4U cabinets,When needing extension,As long as on cabinet insert some boards more,Cabinet can move integrally,It only needs to connect power cord and product harness when test,Measuring unit quantity appropriate can be selected according to demand,It can accomplish all channels concurrent testing simultaneously,Greatly improve device efficiency and utilization rate,It is designed using multrirange,Wide range can accomplish 10A,Easily realize that the switching range of operating current and sleep current monitors,So that power of test significantly improves,The test cell of modularized design not only contributes to plant maintenance,Reduce cost simultaneously,Also have the advantages that integrated level is high.
Description
Technical field:
The present invention relates to electricity field, more particularly to the technology of the vehicle-mounted meter electronics performance of test, especially a kind of onboard instruments
Durable test device.
Background technology
Onboard instruments need to carry out durability experiment test, including to numerous signals such as voltage, electric current, CAN, LIN, GMLine
Carry out long-term comprehensively monitoring and record.In the prior art, the Measurement channel of test equipment is insufficient, no matter for current measurement also
It is that bus measures, existing instrument tool substantially only has one or two channels；In addition, range is insufficient：For example 34972 can be used for
Electric current is measured, but its current range only has 1 ampere, cannot meet the needs of product test；In addition, integrated level is not high：Make
When being measured with a variety of instrument tools, discrete instrument quantity is more, and volume is big, is not easy to carry.
Invention content
It is an object of the invention in view of the above-mentioned drawbacks in the prior art, provide a kind of multi-channel parallel test, multrirange is cut
It changes, the high test device of integrated level.
Its main operational principle is using the multimeter and communication work in test cell and communication unit substitution conventional method
Tool, and test cell and communication unit are integrated into board form and are inserted in 4U cabinets, when needing extension, as long as more on cabinet
Some boards are inserted, cabinet can move integrally, and when test only needs to connect power cord and product harness.
To achieve the above object, the present invention uses following technical scheme：A kind of onboard instruments durable test device, including it is upper
Position computer and the power supply being connected with the upper computer by USB line, the upper computer and 485 communication buses
Connection, wherein further include a CAN bus, at least one standard testing unit, identical as the standard testing number of unit
Load box and with the same number of communication test unit of load box, any one of standard testing unit is each
From including a first singlechip, a voltage test module, a testing current module and a relay control module, institute
Voltage test module, testing current module and the relay control module stated respectively are connect with the first singlechip, the
The communication interface of one microcontroller is connected to 485 communication buses, includes more than two voltages in voltage test module
Acquisition channel, includes more than two digital output channels in relay control module, and any one of communication is surveyed
It includes respectively a second singlechip, a high speed/low speed CAN bus transceiver, a GM Line buses transmitting-receiving to try unit
Device, a LIN bus transceiver and a channel selecting module, the channel selecting module are connect with the CAN bus,
The high speed/low speed CAN bus transceiver, GM Line bus transceivers, LIN bus transceivers respectively connect described the
Two microcontrollers and respectively interface channel selecting module, the communication interface of second singlechip pass through USB cable and the upper electricity
Brain connects, and a meters under test wiring harness interface, the meters under test are each provided in any one of load box
Include CAN bus communication interface, power interface and test signal interface, the CAN bus communication interface in wiring harness interface
It is connect with CAN bus, the power interface and test signal interface are respectively connect with the controlled terminal of relay, the relay
The control terminal of device is connect with the relay control module in standard testing unit, test signal interface include current signal interface and
Voltage signal interface, the controlled terminal and standard testing of the current signal interface and voltage signal interface each by relay
Voltage test module in unit is connected with testing current module.
Further, the voltage range of voltage test module covers 0 to 14V DC voltages.
Further, No. 56 relay control channels are provided in relay control module.
Further, testing current module includes sample circuit, includes to be connected on electricity to be measured in the sample circuit
Sampling resistor in road.
Further, include the sampling resistor for two kinds of resistance values being connected in circuit under test in sample circuit.
The present invention compares with prior art, and effect is actively and it will be evident that the present invention can select to fit according to demand
When measuring unit quantity, can accomplish all channels simultaneously concurrent testing, greatly improve device efficiency and utilization rate, use
Multrirange designs, and wide range can accomplish 10A, easily realizes that the switching range of operating current and sleep current monitors so that survey
Examination ability significantly improves, and the test cell of modularized design not only contributes to plant maintenance, while reducing cost, also has collection
At the high advantage of degree.
Description of the drawings：
Fig. 1 is the equipment schematic of the present invention.
Fig. 2 is the standard testing cellular construction figure of the present invention.
Fig. 3 is the communication test cellular construction figure of the present invention.
Fig. 4 is the circuit diagram of the load box in one embodiment of the present of invention.
Specific implementation mode：
Embodiment:
As shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 4, a kind of onboard instruments durable test device, including upper computer 1 and pass through USB
The power supply 2 that line is connected with the upper computer, the upper computer are connect with 485 communication buses 7, and feature exists
In：Further include a CAN bus, at least one standard testing unit 3, load identical with the standard testing number of unit
Case 5 and with the same number of communication test unit 4 of load box, test product 6 by pin respectively with the load box
And the communication test unit is connected, any one of standard testing unit includes respectively a first singlechip
31,32, testing current modules 33 of a voltage test module and a relay control module 36, the voltage tester
Module, testing current module and relay control module are respectively connect with the first singlechip, and first singlechip is led to
Communication interface is connected to 485 communication buses, includes more than two voltage acquisition channels, relay in voltage test module
Include more than two digital output channels in device control module, any one of communication test unit respectively wraps
Include 41, high speeds of a second singlechip/GM Line bus transceivers 43, one of low speed CAN bus transceiver 42, one
2 bus runs are arranged in LIN bus transceivers 44 and a channel selecting module 45, the channel selecting module, i.e., first is logical
Road 46 and second channel 47, the channel selecting module are connect with the CAN bus, the high speed/low speed CAN bus
Transceiver, GM Line bus transceivers, LIN bus transceivers respectively connect the second singlechip and respective interface channel
The communication interface of selecting module, second singlechip is connect by USB cable 8 with the upper computer, any one of
It is each provided with a meters under test wiring harness interface in load box, includes CAN total in the meters under test wiring harness interface
Line communication interface, power interface and test signal interface, the CAN bus communication interface are connect with CAN bus, the electricity
Source interface and test signal interface are respectively connect with the controlled terminal of relay, control terminal and the standard testing list of the relay
Relay control module connection in member, test signal interface includes current signal interface and voltage signal interface, the electricity
Flow the controlled terminal of signaling interface and voltage signal interface each by relay and the voltage test module in standard testing unit
It is connected with testing current module.Voltage tester process is as follows：(1) host computer test software elder generation sending filter control instruction, life
It enables through the embedded software in 485 bus transfers to standard testing unit, embedded software recognition command keyword, into number
Word amount output program, corresponding digital quantity channel are opened, and signal passes to the relay execution part in load box, then accordingly after
Electric appliance acts, and the corresponding channel of product is opened；(2) host computer test software then sends CAN message and gives CAN communication unit,
The CAN communication unit of respective channel sends this CAN message to corresponding product so that product enters specified state to be measured；(3)
Host computer test software sends the order for reading voltage to standard testing unit, and embedded software recognition command simultaneously enters reading electricity
Program is pressed, the voltage value read is then returned into host computer test software, host computer test software obtains elder generation after test value
Be converted into can apparent value judge whether to pass through then compared with threshold value, then on the one hand will test can apparent value and judging result show
Show interface, on the other hand by time of measuring, original value, can apparent value, judging result be saved in report, be then put into down
The voltage tester of one wheel；Sleep current test process is as follows：(1) host computer test software sends CAN message and gives CAN communication list
The CAN communication unit of member, respective channel sends this CAN message to corresponding product so that product enters sleep state；(2) upper
Machine test software waits for specified time, it is ensured that product has completely passed into sleep state；(3) host computer test software is first sent
The relay control instruction in wide range testing current channel, embedded software recognition command keyword, into digital output journey
Sequence, corresponding digital quantity channel are opened, and signal passes to the relay execution part in load box, and the corresponding actuating of relay makes
Product enters wide range electric current state to be measured；(4) host computer test software sends the order for reading electric current, and embedded software connects
To order, reads and return current data；(5) after host computer test software receives the current data of passback, conversion is to visual
Whether value, small-range accurate measurement can be carried out by slightly sentencing；(6) if it is thick to sentence current value too big, have not been entered into sleep state, then on
Position machine test software will wait for again resurveys after a certain period of time, at most resurveys 4 times, if reaching not yet into small-range accurate measurement
Condition, then show and record using the numerical value of bigness scale as the end value of testing current；(7) if it is thick sentence current value can be into
Enter small-range accurate measurement, then host computer test software can sending filter switching command, by embedded software transmission execute order,
Load box relay execution unit acts, and into small-range accurate measurement, the numerical value of final accurate measurement shows and protects as sleep current value
It deposits.
Further, the voltage range of voltage test module covers 0 to 14V DC voltages.
Further, No. 56 relay control channels are provided in relay control module.
Further, testing current module includes sample circuit, includes to be connected on electricity to be measured in the sample circuit
Sampling resistor in road, sampling resistor voltage pass through voltage amplifier circuit, voltage can be measured by voltage acquisition channel
Value, using parameter conversion, you can obtain current value.
Further, as shown in Fig. 2, interior 2 different resistance values of setting of sample circuit of the testing current module are adopted
Sample resistance is electrically connected by switching, one of sampling resistor can be made to be connected serially in circuit under test, is connected to No. 1 sampling resistor
The sample circuit range is 0.1 ampere when 34, and it is 10 amperes to be connected to sample circuit range when No. 2 sampling resistors 35, amount
Journey is 10 amperes, is used for bigness scale, and range is 0.1 ampere, is used for accurate measurement, is by first bigness scale accurate measurement again in actual test
Mode improves the accuracy of current measurement by the switching of two ranges.
Claims (5)
1. a kind of onboard instruments durable test device, including upper computer and it is connected with the upper computer by USB line
Power supply, the upper computer connect with 485 communication buses, it is characterised in that：It further include a CAN bus, at least
One standard testing unit, with the identical load box of standard testing number of unit and identical as the load box number
Communication test unit, any one of standard testing unit includes respectively that a first singlechip, voltage are surveyed
Die trial block, a testing current module and a relay control module, the voltage test module, testing current module and
Relay control module is respectively connect with the first singlechip, and the communication interface of first singlechip is connected to described
485 communication buses include more than two voltage acquisition channels in voltage test module, include in relay control module
More than two digital output channels, any one of communication test unit respectively include a second singlechip,
One high speed/low speed CAN bus transceiver, a GM Line bus transceiver, a LIN bus transceiver and a channel
Selecting module, the channel selecting module are connect with the CAN bus, the high speed/low speed CAN bus transceiver,
GM Line bus transceivers, LIN bus transceivers respectively connect the second singlechip and respectively interface channel selection mould
The communication interface of block, second singlechip is connect by USB cable with the upper computer, in any one of load box
It is each provided with a meters under test wiring harness interface, includes that CAN bus communication connects in the meters under test wiring harness interface
Mouthful, power interface and test signal interface, the CAN bus communication interface connect with CAN bus, the power interface with
Test signal interface is respectively connect with the controlled terminal of relay, the control terminal of the relay in standard testing unit after
Electrical control module connects, and test signal interface includes current signal interface and voltage signal interface, and the current signal connects
Mouth and voltage signal interface are surveyed each by the controlled terminal of relay and the voltage test module in standard testing unit and electric current
Die trial block connects.
2. onboard instruments durable test device as described in claim 1, it is characterised in that：The voltage range of voltage test module
0 is covered to 14V DC voltages.
3. onboard instruments durable test device as described in claim 1, it is characterised in that：It is provided in relay control module
No. 56 relay control channels.
4. onboard instruments durable test device as described in claim 1, it is characterised in that：Testing current module includes sampling electricity
Road includes the sampling resistor being connected in circuit under test in the sample circuit.
5. onboard instruments durable test device as claimed in claim 4, it is characterised in that：Include to be connected in sample circuit
The sampling resistor of two kinds of resistance values in circuit under test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810742767.XA CN108710046A (en) | 2018-07-09 | 2018-07-09 | A kind of onboard instruments durable test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810742767.XA CN108710046A (en) | 2018-07-09 | 2018-07-09 | A kind of onboard instruments durable test device |
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| Publication Number | Publication Date |
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| CN108710046A true CN108710046A (en) | 2018-10-26 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810742767.XA Withdrawn CN108710046A (en) | 2018-07-09 | 2018-07-09 | A kind of onboard instruments durable test device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110958159A (en) * | 2019-11-22 | 2020-04-03 | 英业达科技有限公司 | Configuration method, system, readable storage medium and device for adaptive network pressure measurement |
| CN111829581A (en) * | 2020-06-19 | 2020-10-27 | 惠州市德赛西威汽车电子股份有限公司 | Vehicle-mounted product testing system and method |
| CN113847973A (en) * | 2021-10-22 | 2021-12-28 | 重庆智慧水务有限公司 | Water meter working current testing tool and testing method |
| CN114325156A (en) * | 2021-11-22 | 2022-04-12 | 惠州市德赛西威汽车电子股份有限公司 | System and method for testing multiplex signals sent out by vehicle-mounted instrument |
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| CN110958159A (en) * | 2019-11-22 | 2020-04-03 | 英业达科技有限公司 | Configuration method, system, readable storage medium and device for adaptive network pressure measurement |
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| CN113847973A (en) * | 2021-10-22 | 2021-12-28 | 重庆智慧水务有限公司 | Water meter working current testing tool and testing method |
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| CN114325156A (en) * | 2021-11-22 | 2022-04-12 | 惠州市德赛西威汽车电子股份有限公司 | System and method for testing multiplex signals sent out by vehicle-mounted instrument |
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Application publication date: 20181026 |
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