CN105931446A - Testing system for gas data acquiring unit and working method of testing system - Google Patents
Testing system for gas data acquiring unit and working method of testing system Download PDFInfo
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Abstract
The invention relates to a testing system for a gas data acquiring unit and a working method of the testing system. The testing system for the gas data acquiring unit comprises a testing unit for detection of the gas data acquiring unit and an upper computer connected with the testing unit; the upper computer is suitable for transmitting a testing instruction for detection of the gas data acquiring unit to the testing unit; the testing unit is used for transmitting a corresponding testing signal to the gas data acquiring unit according to the testing instruction; the upper computer is also suitable for receiving testing data which are obtained by the testing unit and are fed back by the gas data acquiring unit, so as to detect whether the gas data acquiring unit is normal or not. According to the testing system and the working method thereof disclosed by the invention, multiple parameters of the gas data acquiring unit can be quickly and accurately measured, and simultaneous measurement of multiple blocks can be realized; the testing system and the working method thereof have the advantages of high testing efficiency, good testing accuracy and comprehensive testing data.
Description
Technical field
The present invention relates to a kind of combustion gas data acquisition unit test system and method for work thereof.
Background technology
Combustion gas data acquisition unit mainly with gather the parameter such as consumption of combustion gas, and be sent to take by GPRS
Business device.The combustion gas data acquisition unit test request that dispatches from the factory is strict, and test point is many.Test in the past is all to use people
Work mode, labor intensive, and inefficiency.Use instrument test the most qualified at combustion gas data acquisition unit,
The error that human factor causes can be rejected, improve testing efficiency, save artificial, also make test have an amount
The standard changed.
Summary of the invention
It is an object of the invention to provide a kind of combustion gas data acquisition unit test system and method for work thereof, to solve
Certainly combustion gas data acquisition unit is realized the technical problem of detection automatically.
In order to solve above-mentioned technical problem, the invention provides a kind of test for combustion gas data acquisition unit
Unit, including: for the test cell of combustion gas data acquisition unit detection, be connected with test cell is upper
Machine；Described host computer is suitable to test cell sends the test instruction for the detection of combustion gas data acquisition unit,
The transmission of combustion gas data acquisition unit is tested signal according to above-mentioned test instruction by described test cell accordingly；And
Described host computer is further adapted for receiving the test data fed back by combustion gas data acquisition unit that test cell obtains,
The most normal with detection combustion gas data acquisition unit.
Further, described test cell includes: processor module, the digital quantity being connected with this processor module
Detection module, load handover module, D/A module, constant-current source circuit and serial ports test cell；And described place
The control instruction generation that reason device module is suitable to according to host computer detects data accordingly, sends to combustion gas data acquisition
Unit, and also receive the respective feedback data of combustion gas data acquisition unit, and feedback data is sent supreme
Position machine, i.e. compares with test data, it is thus achieved that corresponding test result.
Further, described host computer is suitable to control digital quantity detection module test combustion gas number by processor module
Work the most normal according to the digital I/O mouth of collecting unit；I.e.
During test, host computer sends switching value by test cell to combustion gas data acquisition unit and opens or closes
Order, and after time delay certain time, it is corresponding that host computer reads combustion gas data acquisition unit by test cell
I/O mouth value；If this each I/O mouth value is consistent with the value required by the order of transmission, it is determined that each I/O mouth
Working properly.
Further, described processor module is suitable to the setting according to host computer, to control load handover module pair
The test voltage of combustion gas data acquisition unit carries out band load or unloaded switching.
Further, described host computer is suitable to control serial ports test cell detection combustion gas data by processor module
The serial communication of collecting unit.
Further, described host computer is suitable to control the D/A module high-precision corresponding survey of output by processor module
Examination voltage, and the test electric current matched with corresponding test voltage is exported by constant-current source circuit, and defeated
Go out the voltage of combustion gas data acquisition unit, current value that test voltage, current value obtain with feedback to compare,
Each analog port with detection combustion gas data acquisition unit is the most normal.
Further, described processor module is also connected with temperature detecting module, to obtain combustion gas data acquisition list
The temperature value of the residing test environment of unit, and send to host computer, survey residing for combustion gas data acquisition unit to build
The temperature curve in test ring border.
Another aspect, present invention also offers a kind of method of work testing system, comprises the steps:
Step S1, builds detection network；
Step S2, setup parameter, carry out demarcating and testing；And
Step S3, analyzes feedback result.
Further, described test system includes: the test cell detected for combustion gas data acquisition unit, with
The host computer that test cell is connected；Described host computer is suitable to send test cell for combustion gas data acquisition list
The test instruction of unit's detection, combustion gas data acquisition unit is sent by described test cell according to above-mentioned test instruction
Test signal accordingly；And described host computer is further adapted for receiving, and test cell obtains by combustion gas data acquisition list
The test data of unit's feedback are the most normal to detect combustion gas data acquisition unit；Further, described test cell
It is provided with the RS485 communication module being suitable to networking；Described step S1 builds the method for detection network and includes: pass through
Described test cell is connected with some combustion gas data acquisition units by RS485 bus, to build detection network.
Further, setup parameter in described step S2, the method carrying out demarcating and carrying out testing includes: set
Parameter, i.e. by test voltage, the bound of electric current of the output of host computer configuration testing unit, by arrange
Parameter is saved in the database parameter table in the memory module of test cell and host computer；Demarcate, i.e.
Test voltage, electric current are carried out linear scale demarcation；Test, i.e. include: to combustion gas data acquisition list
The digital I/O mouth test of unit, tests, to combustion gas data acquisition each analog port of combustion gas data acquisition unit
The serial communication test of collection unit；Wherein the digital I/O mouth of combustion gas data acquisition unit is tested, i.e. described
Host computer is suitable to be controlled the numeral of digital quantity detection module test combustion gas data acquisition unit by processor module
The work of I/O mouth is the most normal；During test, host computer is sent out to combustion gas data acquisition unit by test cell
Pass amount opens or closes order, and after time delay certain time, host computer reads combustion gas number by test cell
According to the I/O mouth value that collecting unit is corresponding；If this each I/O mouth value is consistent with the value required by the order of transmission,
Then determine that each I/O mouth is working properly；Each analog port of combustion gas data acquisition unit is tested, the most described on
Position machine is suitable to control D/A module by processor module and exports high-precision corresponding test voltage, and passes through constant current
Source circuit exports the test electric current matched with corresponding test voltage, and output test voltage, current value
Compare with the voltage of combustion gas data acquisition unit, the current value of feedback acquisition, to detect combustion gas data acquisition
Each analog port of collection unit is the most normal；The serial communication of combustion gas data acquisition unit is tested, i.e. described
Host computer is suitable to be controlled by processor module the serial ports of serial ports test cell detection combustion gas data acquisition unit and leads to
News；Described step S3 is analyzed feedback result, above-mentioned test data are packed according to MODBUS form, and
It is stored in the database of host computer；Further, the method for work of described test system also includes: step S4, place
Reason device module is also connected with temperature detecting module, to obtain the temperature of test environment residing for combustion gas data acquisition unit
Angle value, and send to host computer, to build the temperature curve of test environment residing for combustion gas data acquisition unit.
The invention has the beneficial effects as follows, the combustion gas data acquisition unit test system of the present invention and method of work thereof
Can the many kinds of parameters that measure combustion gas data acquisition unit of fast accurate, and can measure with polylith simultaneously,
Have testing efficiency height, test accuracy is good, test the comprehensive advantage of data.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the theory diagram of the test system of the present invention；
Fig. 2 is the schematic block circuit diagram of the load handover module of the present invention；
Fig. 3 is the circuit theory diagrams of the constant-current source circuit of the present invention；
Fig. 4 is 485 communication interface circuit figures；
Fig. 5 is 422 communication interface circuit figures；
Fig. 6 is the flow chart of the method for work of the test system of the present invention.
Detailed description of the invention
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification,
The basic structure of the present invention is described the most in a schematic way, and therefore it only shows the composition relevant with the present invention.
Embodiment 1
As it is shown in figure 1, a kind of test system for combustion gas data acquisition unit of the present invention, including: use
In the test cell of combustion gas data acquisition unit detection, the host computer being connected with test cell；Described host computer
Be suitable to test cell sends the test instruction for the detection of combustion gas data acquisition unit, described test cell root
According to above-mentioned test instruction, signal is tested in the transmission of combustion gas data acquisition unit accordingly；And described host computer is the suitableeest
In receiving the test data fed back by combustion gas data acquisition unit that test cell obtains, to detect combustion gas data
Collecting unit is the most normal.
As test cell one preferred embodiment, described test cell includes: processor module, with
This processor module be connected digital quantity detection module, load handover module, D/A module, constant-current source circuit and
Serial ports test cell；And described processor module is suitable to the control instruction according to host computer and produces corresponding detection
Data, send to combustion gas data acquisition unit, and also receive the respective feedback number of combustion gas data acquisition unit
According to, and feedback data is sent to host computer, i.e. compare with test data, it is thus achieved that corresponding test result.
Concrete, described host computer is suitable to control digital quantity detection module test combustion gas number by processor module
Work the most normal according to the digital I/O mouth of collecting unit；When i.e. testing, host computer passes through test cell to combustion
Gas data acquisition unit sends switching value and opens or closes order, and after time delay certain time, host computer leads to
Cross test cell and read the I/O mouth value that combustion gas data acquisition unit is corresponding；If this each I/O mouth value and transmission
Value required by order is consistent, it is determined that each I/O mouth is working properly.
As in figure 2 it is shown, described processor module is suitable to the setting according to host computer, to control load switching mould
Block carries out band load or unloaded switching to the test voltage of combustion gas data acquisition unit.Concrete, by arranging VC2
Be 1 or 0 can switch band carry and no load test pattern.When VC2 is high level when, triode Q1 leads
Logical, carry test pattern for band, when VC2 is low level time, triode Q1 ends, for no load test mould
Formula；Wherein J1 is test power interface, and V1 terminal voltage is to need to carry out the voltage of A/D conversion, to obtain phase
Answer voltage value data.
Concrete, described host computer is suitable to control serial ports test cell detection combustion gas data by processor module
The serial communication of collecting unit.
Concrete, described host computer is suitable to control D/A module by processor module and exports high-precision corresponding survey
Examination voltage, and the test electric current matched with corresponding test voltage is exported by constant-current source circuit, and defeated
Go out the voltage of combustion gas data acquisition unit, current value that test voltage, current value obtain with feedback to compare,
Each analog port with detection combustion gas data acquisition unit is the most normal.
As it is shown on figure 3, AOUT connects the output of D/A module in figure, control DA mould by processor module
The magnitude of voltage that block output is different, and then control the constant-current source circuit corresponding current value of output.Wherein CON end is electricity
Stream output.
Concrete, described processor module is also connected with temperature detecting module, to obtain combustion gas data acquisition list
The temperature value of the residing test environment of unit, and send to host computer, survey residing for combustion gas data acquisition unit to build
The temperature curve in test ring border.
Described processor module is suitable for use with ARM STM32F103VE processor, for preserving configuration parameter
Storage chip is AT24C256；D/A module is suitable for use with DAC8411 as voltage pio chip；Use SP3072
Chip realizes 485 and communicates (2 SP3072 realize a road 422 and communicate) with 422；Use SP3232 conduct
RS232 communication chip；LM2596 and LM1117-3.3 is used to constitute system power supply module；Use MC14052B
As analog switch, it is achieved port switches；DS18B20 is used to form temperature sensing module.
As shown in Figure 4 and Figure 5, concrete, the communication interface being connected with host computer in described test cell is
Passive serial ports, is further provided with for building detection network, with by some combustion gas data acquisition units and test
Unit is connected and carries out the shared communication interface of networking, serial port be suitable for use with RS232, RS485,
RS422, wherein uses SP3072 chip to realize 485 and communicates with 422 that (2 SP3072 realize a road 422
Communication)；Use SP3232 as RS232 communication chip；And realize shared communication by analog switch
Mouth switching between RS232,485,422, owing to test cell includes 2 shared communication ports, so
Have employed 2 MC14052 to realize, the most a piece of interface as above schemes (another sheet is similar to).
Described test cell also includes: indicating module, and described indicating module is such as but not limited to using by some
The display circuit that LED module is constituted.
Embodiment 2
On the basis of embodiment 1, present invention also offers a kind of method of work testing system, including as follows
Step:
Step S1, builds detection network；
Step S2, setup parameter, carry out demarcating and testing；And
Step S3, analyzes feedback result.
Described test system includes: for the test cell of combustion gas data acquisition unit detection, with test cell
The host computer being connected；Described host computer is suitable to send test cell for the detection of combustion gas data acquisition unit
Test instruction, described test cell is according to above-mentioned test instruction test corresponding to the transmission of combustion gas data acquisition unit
Signal；And described host computer is further adapted for receiving, and test cell obtains is fed back by combustion gas data acquisition unit
Test data are the most normal to detect combustion gas data acquisition unit；Further, described test cell is provided with and is suitable to
The RS485 communication module of networking.
Concrete, described step S1 builds the method for detection network and includes: passed through by described test cell
RS485 bus is connected with some combustion gas data acquisition units, to build detection network.
Setup parameter in described step S2, the method carrying out demarcating and carrying out testing includes: setup parameter, i.e.
By test voltage, the bound of electric current of the output of host computer configuration testing unit, the parameter arranged is preserved
In the database parameter table in the memory module and host computer of test cell.
Demarcate, i.e. test voltage, electric current are carried out linear scale demarcation.
Test, i.e. include: the digital I/O mouth of combustion gas data acquisition unit is tested, to combustion gas data
Each analog port test of collecting unit, tests the serial communication of combustion gas data acquisition unit；Wherein
Testing the digital I/O mouth of combustion gas data acquisition unit, the most described host computer is suitable to pass through processor die
The digital I/O mouth work that block controls digital quantity detection module test combustion gas data acquisition unit is the most normal；
During test, host computer sends switching value by test cell to combustion gas data acquisition unit and opens or closes
Order, and after time delay certain time, it is corresponding that host computer reads combustion gas data acquisition unit by test cell
I/O mouth value；If this each I/O mouth value is consistent with the value required by the order of transmission, it is determined that each I/O mouth
Working properly；
Testing each analog port of combustion gas data acquisition unit, the most described host computer is suitable to pass through processor die
Block controls D/A module and exports high-precision corresponding test voltage, and by constant-current source circuit output and corresponding test
The test electric current that voltage matches, and the combustion gas data that output test voltage, current value are obtained with feedback
The voltage of collecting unit, current value are compared, and detecting each analog port of combustion gas data acquisition unit are
No normally；
Export high-precision voltage by D/A module, coordinate constant-current source circuit output 4mA, 8mA, 12mA, 20mA
Electric current.During test, test system, by the different voltage of DA output, controls the different current value of crossing current source output.
After spending the 1-2 second, test system sends commands to combustion gas data acquisition unit, and combustion gas data acquisition unit is inspection
The current value measured is sent to detecting system.Current value that detecting system arranges self and combustion gas data acquisition
Whether the current value that unit collects is compared, close with the analog port that this judges combustion gas data acquisition unit
Lattice.
Testing the serial communication of combustion gas data acquisition unit, the most described host computer is suitable to pass through processor module
Control the serial communication of serial ports test cell detection combustion gas data acquisition unit；
The serial ports of test system serial ports with combustion gas data acquisition unit respectively is connected.The a certain road of brief description is gone here and there
The detection process of mouth: test system sends data 0001 to combustion gas data acquisition unit, combustion gas by serial ports A
Data acquisition unit is saved in appropriate address after receiving 0001, after spending 1 second, test system sends order,
Reading the serial data that combustion gas data acquisition unit received just now, combustion gas data acquisition unit is just now preserving
Data 0001 be sent to test system, after test system receives the number that data acquisition unit sends over,
Checking whether to be 0001, this road serial ports if not just explanation combustion gas data acquisition unit is defective.Often survey
Once, the data of transmission just add 1, such as in examination: second time test just sends 0002, after preventing serial ports from damaging, deposit
Storage unit the most in store 0001, and system of testing sends always is also 0001, causes system to be judged by accident always
The serial ports of disconnected combustion gas data acquisition unit is normal.
Described step S3 is analyzed feedback result, above-mentioned test data are packed according to MODBUS form, and
It is stored in the database of host computer；
Further, the method for work of described test system also includes: step S4, and processor module is also examined with temperature
Survey module is connected, and to obtain the temperature value of test environment residing for combustion gas data acquisition unit, and sends to upper
Machine, to build the temperature curve of test environment residing for combustion gas data acquisition unit.
As shown in Figure 6, concrete implementation process is as follows:
(1) when carrying out test job, first (need to be by RS232-485 modulus of conversion the serial ports of host computer
Block) and computer connectivity port (485) connection of test cell, and test cell and combustion gas data acquisition list
Unit's winding displacement connects (39 tie points), connects 24V power supply to test cell simultaneously.
(2) after test cell energising, by the port of upper computer selecting test cell, to be attached.Connect
And test number of units is set by host computer, if multiple stage parallel connection test, be also required to be each test cell and be configured to
Location, address can not be repeated, and be started to be incremented by successively from 1.Then the numbering of combustion gas data acquisition unit is read,
And create new data table, it is this TV station combustion gas data acquisition unit in database, creates (the preservation survey of a table
Examination process data).In the time that input is to be tested, and virtual instrument is set, i.e. combustion gas data acquisition unit
(Virtual instrument pattern table is the test pattern of combustion gas data acquisition unit, is used for be arranged to virtual instrument pattern
Factory is detected).
(3) test cell of different address can be selected after completing arrangement above, and configure voltage, electricity for it
The bound of current test, the FLASH that the parameter of setting can preserve to test cell by the way of download (deposits
Storage module) and database parameter list in, test same product later every time and can directly invoke setting last time
Parameter.
(4) can select to test in host computer terminate after must select as the statistical items of product index
Item to be tested, its relevant parameter can download in test cell, operationally will skip the survey do not chosen
Examination item, does not tests, and improves efficiency.
(5) voltage x current is demarcated, voltage x current can be carried out linear scale demarcation.First-selected choosing before demarcating
Select the address of test cell to be demarcated, nominal voltage when, test to each analog quantity of test cell
(5V, 9V and 24V, nominal voltage must be by high-precision for input accurate voltage for port (CPU carries internal A/D)
Degree voltage source provides), and demarcate according to actual input voltage value, test cell can carry out A/D conversion,
Calculate the magnitude of voltage measured, and compare with the actual voltage value inputted, calculate error rate, mend
Repay.And demarcate according to actual input current value, input current value (unit is milliampere), and at electricity
Stream output concatenation high-precision current table, constantly changes input current, is allowed to be suitable for the current value of test regulation,
System can automatically record calibration process parameter preserve, afterwards the when of official testing just using this parameter as
Output valve (note: calibrating function is not that test is had to use for every time, when test cell uses overlong time,
Or test man feels, when the analog signals that system detects is inaccurate, to demarcate system once).
(6) data can be carried out after completing all above configurations to check, if errorless, start test, survey
Combustion gas data acquisition unit is tested, the when of test, such as by examination unit according to the parameter of arrangement above
But it is not limited to according to switching value → electric current → serial ports → voltage sequence test, complete test of a procedural test
Data packing preserve (by MODBUS form), subsequently into the next one circulation continue test, host computer every
A period of time (about 10 seconds) just sends order, gathers the test packet of a slave computer, and is stored in number
According to storehouse.
(7) when tested between terminate after, host computer in database gather test parameter be analyzed, and
Be given final analysis result (by or do not pass through), user can check statistics knot by the interface of host computer
Really, the specifying information of each combustion gas data acquisition unit test is checked the most respectively, it is also possible to the most fixed
Trouble point, position, keeps in repair.
(8) user can also in test process or test terminate after check voltage and temperature curve, analyze temperature
The degree height influence degree to voltage.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, related work
Personnel can carry out various change and amendment completely in the range of without departing from this invention technological thought.
The content that the technical scope of this invention is not limited on specification, it is necessary to according to right
Determine its technical scope.
Claims (10)
1. the test system for combustion gas data acquisition unit, it is characterised in that including: for combustion gas
The test cell of data acquisition unit detection, the host computer being connected with test cell；
Described host computer is suitable to test cell sends the test instruction for the detection of combustion gas data acquisition unit,
The transmission of combustion gas data acquisition unit is tested signal according to above-mentioned test instruction by described test cell accordingly；And
Described host computer is further adapted for receiving the test number fed back by combustion gas data acquisition unit that test cell obtains
According to, the most normal to detect combustion gas data acquisition unit.
Test system the most according to claim 1, it is characterised in that described test cell includes: place
Reason device module, the digital quantity detection module being connected with this processor module, load handover module, D/A module,
Constant-current source circuit and serial ports test cell；And
The control instruction generation that described processor module is suitable to according to host computer detects data accordingly, sends to combustion
Gas data acquisition unit, and also receive the respective feedback data of combustion gas data acquisition unit, and by feedback coefficient
According to sending to host computer, i.e. compare with test data, it is thus achieved that corresponding test result.
Test system the most according to claim 2, it is characterised in that
Described host computer is suitable to control digital quantity detection module test combustion gas data acquisition list by processor module
The digital I/O mouth work of unit is the most normal；I.e.
During test, host computer sends switching value by test cell to combustion gas data acquisition unit and opens or closes
Order, and after time delay certain time, it is corresponding that host computer reads combustion gas data acquisition unit by test cell
I/O mouth value；If this each I/O mouth value is consistent with the value required by the order of transmission, it is determined that each I/O mouth
Working properly.
Test system the most according to claim 3, it is characterised in that
Described processor module is suitable to the setting according to host computer, to control load handover module to combustion gas data
The test voltage of collecting unit carries out band load or unloaded switching.
Test system the most according to claim 4, it is characterised in that
Described host computer is suitable to control serial ports test cell detection combustion gas data acquisition unit by processor module
Serial communication.
Test system the most according to claim 5, it is characterised in that
Described host computer is suitable to control D/A module by processor module and exports high-precision corresponding test voltage,
And exported the test electric current matched with corresponding test voltage by constant-current source circuit, and output test electricity
The voltage of combustion gas data acquisition unit, current value that pressure, current value obtain with feedback are compared, with detection
Each analog port of combustion gas data acquisition unit is the most normal.
Test system the most according to claim 6, it is characterised in that described processor module also with temperature
Degree detection module is connected, and to obtain the temperature value of test environment residing for combustion gas data acquisition unit, and sends extremely
Host computer, to build the temperature curve of test environment residing for combustion gas data acquisition unit.
8. test a method of work for system, comprise the steps:
Step S1, builds detection network；
Step S2, setup parameter, carry out demarcating and testing；And
Step S3, analyzes feedback result.
Method of work the most according to claim 8, it is characterised in that
Described test system includes: for the test cell of combustion gas data acquisition unit detection, with test cell
The host computer being connected；
Described host computer is suitable to test cell sends the test instruction for the detection of combustion gas data acquisition unit,
The transmission of combustion gas data acquisition unit is tested signal according to above-mentioned test instruction by described test cell accordingly；And
Described host computer is further adapted for receiving the test number fed back by combustion gas data acquisition unit that test cell obtains
According to, the most normal to detect combustion gas data acquisition unit；
Further, described test cell is provided with the RS485 communication module being suitable to networking；
Described step S1 builds the method for detection network and includes: by described test cell by RS485 bus
It is connected with some combustion gas data acquisition units, to build detection network.
Method of work the most according to claim 9, it is characterised in that
Setup parameter in described step S2, the method carrying out demarcating and carrying out testing includes:
Setup parameter, i.e. by test voltage, the bound of electric current of the output of host computer configuration testing unit,
The parameter of setting is saved in the database parameter table in the memory module of test cell and host computer；
Demarcate, i.e. test voltage, electric current are carried out linear scale demarcation；
Test, i.e. include: the digital I/O mouth of combustion gas data acquisition unit is tested, to combustion gas data
Each analog port test of collecting unit, tests the serial communication of combustion gas data acquisition unit；Wherein
Testing the digital I/O mouth of combustion gas data acquisition unit, the most described host computer is suitable to pass through processor die
The digital I/O mouth work that block controls digital quantity detection module test combustion gas data acquisition unit is the most normal；
During test, host computer sends switching value by test cell to combustion gas data acquisition unit and opens or closes
Order, and after time delay certain time, it is corresponding that host computer reads combustion gas data acquisition unit by test cell
I/O mouth value；If this each I/O mouth value is consistent with the value required by the order of transmission, it is determined that each I/O mouth
Working properly；
Testing each analog port of combustion gas data acquisition unit, the most described host computer is suitable to pass through processor die
Block controls D/A module and exports high-precision corresponding test voltage, and by constant-current source circuit output and corresponding test
The test electric current that voltage matches, and the combustion gas data that output test voltage, current value are obtained with feedback
The voltage of collecting unit, current value are compared, and detecting each analog port of combustion gas data acquisition unit are
No normally；
Testing the serial communication of combustion gas data acquisition unit, the most described host computer is suitable to pass through processor module
Control the serial communication of serial ports test cell detection combustion gas data acquisition unit；
Described step S3 is analyzed feedback result, above-mentioned test data are packed according to MODBUS form, and
It is stored in the database of host computer；
Further, the method for work of described test system also includes: step S4, and processor module is also examined with temperature
Survey module is connected, and to obtain the temperature value of test environment residing for combustion gas data acquisition unit, and sends to upper
Machine, to build the temperature curve of test environment residing for combustion gas data acquisition unit.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108072855A (en) * | 2016-11-16 | 2018-05-25 | 通号（北京）轨道工业集团有限公司 | A kind of test device and test system |
| CN108919308A (en) * | 2018-07-09 | 2018-11-30 | 北京市燃气集团有限责任公司 | A kind of combustion gas data collection system based on Beidou Differential positioning |
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