CN107703796A - television environment pressure test device and method - Google Patents
television environment pressure test device and method Download PDFInfo
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- CN107703796A CN107703796A CN201710853676.9A CN201710853676A CN107703796A CN 107703796 A CN107703796 A CN 107703796A CN 201710853676 A CN201710853676 A CN 201710853676A CN 107703796 A CN107703796 A CN 107703796A
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- main controller
- television environment
- test device
- pressure test
- break
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
Abstract
The present invention relates to a kind of television environment pressure test device, including：Converter circuit, for the temperature transition detected into thermo-electromotive force signal and to be exported；Main controller, it is connected with the converter circuit, the main controller is used to receive the thermo-electromotive force signal and output break-make electric signal；Relay circuit, it is connected with the main controller, for receiving the break-make electric signal, and according to the break-make electric signal main controller is carried out with power path isolating control；Wherein, the power path is established by external power source and load.The invention further relates to the television environment method for testing pressure based on television environment pressure test device.It is consistent with chamber temperature so as to reach power supply, and when overcoming while testing more TV the problem of electricity shortage, and then testing efficiency is improved, reduce testing cost.
Description
Technical field
The present invention relates to TV technical field of measurement and test, more particularly to a kind of television environment pressure test device and method.
Background technology
At present, all TV production firms all can carry out a series of test to TV to ensure before TV dispatches from the factory
Quality reaches criterion of acceptability, and the environmental pressure test of wherein TV is a very important project, because this is directly affected
Service life of the TV during the use in future under various circumstances.
At present, traditional television environment pressure test typically using Programmable AC Power Source control TV according to pre-setting
Power supply state curve and environmental test chamber condition curve tested.But because the cost of Programmable AC Power Source is high, and
And for testing more TV simultaneously, its driving force can obvious deficiency；And Programmable AC Power Source is surveyed with environmental test chamber
Test ring border does not have reponse system, it is impossible to ensures that the temperature of power supply and chamber is consistent.So as to leverage testing efficiency,
Improve testing cost.
The content of the invention
Based on this, it is necessary to a kind of, testing cost high the problem of low for testing efficiency, there is provided television environment pressure test
Device and method.
A kind of television environment pressure test device, it is characterised in that including：
Converter circuit, for the temperature transition detected into thermo-electromotive force signal and to be exported；
Main controller, it is connected with the converter circuit, the main controller is used to receive the thermo-electromotive force signal and output
Break-make electric signal；
Relay circuit, it is connected with the main controller, for receiving the break-make electric signal, and according to the break-make telecommunications
Carry out with power path number to main controller isolating control；
Wherein, the power path is established by external power source and load.
In one embodiment, the main controller uses STM32F103 chips, and the break-make electric signal passes through
The input and output pin output of STM32F103 chips.
In one embodiment, the converter circuit includes the thermocouple and MAX31855 chips being connected with each other, described
MAX31855 chips are connected with main controller, and the thermo-electromotive force signal is defeated by the input and output pin of the MAX31855 chips
Go out.
In one embodiment, the main controller is also connected with crystal oscillating circuit；The crystal oscillating circuit is used to provide for main controller
Clock signal.
In one embodiment, the relay circuit includes solid-state relay and power path, the solid-state relay
It is connected with main controller, main controller and the power supply is realized for receiving the break-make electric signal, and according to the break-make electric signal
The isolation control of path.
In one embodiment, the main controller is also connected with display module；The display module is used to show current test
Progress and current test state.
In one embodiment, in addition to key circuit；The key circuit is connected with main controller, is believed for output key
Number main controller is given, main controller is performed test program according to push button signalling.
In one embodiment, the key circuit includes multiple button branch roads, and the one of each button branch road and main controller
Individual input port connection.
A kind of television environment method for testing pressure, based on television environment pressure test device, in chamber
TV carry out environmental pressure test, including step：
After test instruction is received, chamber temperature data is gathered；
When receiving the temperature data, start timer as time base, recording test time；
If the testing time, the temperature data meet preparatory condition simultaneously, output break-make electric signal control relay
Device is tested more TVs simultaneously.
Above-mentioned television environment pressure test device and method, by using converter circuit, main controller collection experiment box temperature
Degree realizes closed-loop control, the problem of overcoming energizing step and environmental test chamber step synchronization, by introducing relay, overcomes
When testing more TV simultaneously the problem of electricity shortage, and then testing efficiency is improved, reduce testing cost.
Brief description of the drawings
Fig. 1 is the television environment pressure test device module map in an embodiment；
Fig. 2 is the schematic diagram of the relay circuit in Fig. 1；
Fig. 3 is the converter circuit schematic diagram in Fig. 1；
Fig. 4 is the display module schematic diagram in Fig. 1；
Fig. 5 is the key circuit schematic diagram in Fig. 1；
Fig. 6 is the television environment method for testing pressure flow chart in an embodiment.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the better embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose for providing these embodiments is to make to understand more the disclosure
Add thorough and comprehensive.
Fig. 1 is the television environment pressure test device of an embodiment.The television environment pressure test device 10 includes master control
Device 100 and relay circuit 200 and converter circuit 300.Converter circuit 300 be used for will the temperature transition that detect into heat
Electromotive force signal is simultaneously exported, and the thermocouple of converter circuit 300 is placed in chamber 40.Main controller 100 and converter circuit 300
Connection, receive thermo-electromotive force signal and according to thermo-electromotive force signal output break-make electric signal.Relay circuit 200 and main controller
100 connections, receive break-make electric signal, main controller are carried out with power path according to break-make electric signal to isolate control.Wherein, it is described
Power path is established by externally fed power supply 20 and load 30.External power source 20 is usually civil power.Load 30 can be more electricity
Depending on machine.
In one embodiment, the test program that main controller 100 performs is primarily referred to as being used for television set in the present embodiment
Switch testing relative program, including break-make electrical testing.Break-make electrical testing can test the power on/off of various different situations,
Such as be powered 1 minute, power off 1 minute, then perform repeatedly；Or be powered 1 minute, power off 30 seconds, then perform repeatedly etc..
These test programs can be performed successively by main controller 100, or the selection according to tester, perform a part therein.
In one embodiment, main controller 100 can be generated for relay circuit 200 when performing test program
Break-make electric signal, it belongs to electric signal, such as can be low and high level signal.In one of the embodiments, the master control
Device 100 can use STM32F103 chips, and the break-make electric signal is exported by the input and output pin of STM32F103 chips.
STM32F103 chips are singlechip chip, can load good test program prepared in advance, export break-make electric signal.
Specifically, as shown in Fig. 2 in one embodiment, relay circuit 200 can include solid-state relay 210, electricity
Source path 220.The optocoupler part of solid-state relay 210 is connected with the output pin of main controller 100, to receive main controller 100
The break-make electric signal of output.The semiconductor devices of solid-state relay 210 can be in bidirectional triode thyristor, bidirectional thyristor at least
It is a kind of.Power path 220 is established by external power source 20 and load 30.Load 30 can be multiple TV set.As preferable reality
Mode is applied, the semiconductor devices of solid-state relay 210 uses bidirectional triode thyristor.
Solid-state relay is made up of three parts：Input circuit, drive circuit and output circuit.Solid-state relay be it is a kind of by
The new noncontacting switch of solid state electrical components composition, utilizes electronic building brick (such as switch triode, bidirectional triode thyristor semiconductor
Component) switching characteristic, reach contactless, no-spark and can turn on the purpose with disconnecting circuit.
In one embodiment, relay circuit 200 can also include operation indicator, and it receives break-make telecommunications simultaneously
Number, according to power on/off signal designation working condition.Operation indicator includes LED light.
As shown in figure 3, in one embodiment, converter circuit 300 includes the He of thermocouple 310 interconnected
MAX31855 chips 320, MAX31855 chips 320 are connected with main controller 100, and thermo-electromotive force signal passes through MAX31855 chips
320 input and output pin output.Thermocouple 310 gathers the real time temperature of chamber 40, and real time temperature is passed through
MAX31855 chips 320 are converted into thermo-electromotive force signal and exported, and main controller 100 exports break-make after receiving thermo-electromotive force signal
Electric signal is to relay circuit 200.
MAX31855 chips have cold junction compensation, and K, J, N, T or E type thermocouple signal are converted into digital quantity.Device is defeated
Go out the data of 14 bit strip symbols, by SPITM compatibility interfaces, export in a read-only format.The temperature resolution of converter is 0.25
DEG C, maximum temperature reading is+1800 DEG C, and minimum temperature reading is -270 DEG C, and for K-type thermocouple, temperature range is -200 DEG C
To+700 DEG C, ± 2 DEG C of precision are kept.
In one embodiment, main controller 100 can also connect crystal oscillating circuit 400.It is main controller that crystal oscillating circuit 400, which is used for,
100 provide clock signal.The more accurate external crystal oscillation circuit 400 of clock can also be used, is provided for main controller 100 more accurate
Clock signal.
In one embodiment, main controller 100 can also connect display module 500.Display module 500 is used for real-time display
Current testing progress and current test state.
As shown in figure 4, the connection corresponding with the pin of main controller 100 of each pin of display module 500, display module show
Display screen can be LCDs and LED display.
In one embodiment, television environment pressure test device 10 also includes key circuit 600.Key circuit 600 with
Main controller 100 connects.The push button signalling that the main controller 100 exports according to key circuit 600 performs test program.Key circuit
The push button signalling of 600 outputs can include starting test program, pause test program, close test program and selection test item
Mesh etc..
Specifically, as shown in figure 5, in one embodiment, key circuit 600 can include multiple button branch roads, each
Button branch road is connected with an input port of main controller 100, when the button on button branch road is pressed, provides difference respectively
Test signal.
Above-described embodiment is overcome because driving force deficiency can not test more electricity simultaneously because introducing relay circuit
Depending on the problem of, chamber temperature is gathered by main controller and realizes closed-loop control, and because adds converter circuit and display
Shield circuit, allow the temperature of chamber and energizing step to be consistent, testing progress and test mode can also be allowed to present in real time
Out, the efficiency of test is effectively raised, reduces testing cost.
In one embodiment, based on above-mentioned television environment pressure test device, including：Converter circuit 300, for inciting somebody to action
The temperature transition detected is into thermo-electromotive force signal and exports；Main controller 100, it is connected with converter circuit 300, main controller 100
For receiving thermo-electromotive force signal and output break-make electric signal；Relay circuit 200 is connected with main controller 100, receives power on/off
Signal, main controller is carried out with power path according to break-make electric signal to isolate control.Wherein, the power path is by externally fed
Power supply 20 and load 30 are established；Crystal oscillating circuit 400, it is connected with main controller 100, for providing clock signal for main controller 100；It is aobvious
Show module 500, be connected with main controller 100, for showing current testing progress and current test state；Key circuit 600, with master
Device connection 100 is controlled, for output key signal to main controller 100, main controller 100 is performed test program according to push button signalling.
A kind of television environment method for testing pressure, including step are also provided：
S610:After test instruction is received, the temperature data of chamber is gathered.
Specifically, firing test case, main controller perform corresponding survey after the push button signalling of key circuit output is received
Program is tried, signal is gathered to thermocouple output temperature, after thermocouple receives temperature acquisition signal, to the real time temperature of chamber
It is acquired, and is aggregated into temperature data and is converted into thermo-electromotive force signal through MAX31855 chips, thermo-electromotive force signal is sent
To main controller.
S620:When receiving the temperature data, start timer as time base, recording test time.
Specifically, after main controller receives signal, timer is started as timing base, record reaches needed for anticipation temperature
It is the time wanted, main when reaching time needed for first step temperature and temperature data while meeting test condition set in advance
Control device exports break-make electric signal to relay circuit, after relay circuit receives break-make electric signal, controls solid-state relay
Power on/off is carried out to TV.
S630:If the testing time, the temperature data meet preparatory condition simultaneously, the electric signal control of output break-make
Relay is tested more TVs simultaneously.
Specifically, if reaching time needed for temperature and temperature data not while meeting test condition set in advance
When, etc. into standby mode, i.e., time and temperature data needed for temperature to be achieved meet test condition set in advance simultaneously.
After opening test, main controller recording test time, Control experiment box temperature degree, make power supply synchronous with chamber temperature, during which, can be with
Current testing progress and test mode are observed by display screen, after the completion of first step test, changes chamber temperature and repetition
The step of first step, is repeatedly tested TV.After the completion of the test of all steps, this time test terminates.If there is a step
Do not complete, then return to that step and continue to test, test and complete until all steps, then this time test, which is just calculated, completes.
Above-described embodiment, because introducing relay circuit, overcome because driving force deficiency can not test more simultaneously
The problem of TV, chamber temperature is gathered by main controller and realizes closed-loop control, allows the temperature of chamber and energizing step to keep
Unanimously, judge whether every one step is completed by loop test, add reliability, and because add converter electricity
Road and display screen circuit, and allow testing progress and test mode to show in real time, the efficiency of test is effectively raised,
Reduce testing cost.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
- A kind of 1. television environment pressure test device, it is characterised in that including：Converter circuit, for the temperature transition detected into thermo-electromotive force signal and to be exported；Main controller, it is connected with the converter circuit, the main controller is used to receive the thermo-electromotive force signal and output break-make Electric signal；Relay circuit, it is connected with the main controller, for receiving the break-make electric signal, and according to the break-make electric signal pair The main controller carries out isolating control with power path；Wherein, the power path is established by external power source and load.
- 2. television environment pressure test device according to claim 1, it is characterised in that the main controller uses STM32F103 chips, the break-make electric signal are exported by the input and output pin of STM32F103 chips.
- 3. television environment pressure test device according to claim 1, it is characterised in that the converter circuit includes phase The thermocouple and MAX31855 chips to connect, the MAX31855 chips are connected with main controller, and the thermo-electromotive force signal leads to Cross the input and output pin output of the MAX31855 chips.
- 4. television environment pressure test device according to claim 2, it is characterised in that the main controller is also connected with crystal oscillator Circuit；The crystal oscillating circuit is used to provide clock signal for main controller.
- 5. television environment pressure test device according to claim 1, it is characterised in that the relay circuit includes solid State relay and power path；The solid-state relay is connected with main controller, for receiving the break-make electric signal, and according to institute That states that break-make electric signal realizes main controller and the power path isolates control.
- 6. television environment pressure test device according to claim 1, it is characterised in that the main controller is also connected with showing Module；The display module is used to show current testing progress and current test state.
- 7. television environment pressure test device according to claim 1, it is characterised in that also including key circuit；It is described Key circuit is connected with main controller, for output key signal to main controller, main controller is performed test journey according to push button signalling Sequence.
- 8. television environment pressure test device according to claim 7, it is characterised in that the key circuit includes multiple Button branch road, the input port connection of each button branch road and main controller.
- A kind of 9. television environment method for testing pressure, based on television environment pressure test device, in chamber TV carries out environmental pressure test, including step：After test instruction is received, chamber temperature data is gathered；When receiving the temperature data, start timer as time base, recording test time；If the testing time, the temperature data meet preparatory condition simultaneously, output power on/off signal control relay is same When more TVs are tested.
- 10. television environment method for testing pressure according to claim 9, it is characterised in that also include：If the testing time, the temperature data not simultaneously when meeting preparatory condition, wait testing time, described Temperature data meets preparatory condition simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710853676.9A CN107703796A (en) | 2017-09-20 | 2017-09-20 | television environment pressure test device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710853676.9A CN107703796A (en) | 2017-09-20 | 2017-09-20 | television environment pressure test device and method |
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| Publication Number | Publication Date |
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| CN107703796A true CN107703796A (en) | 2018-02-16 |
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| CN201710853676.9A Pending CN107703796A (en) | 2017-09-20 | 2017-09-20 | television environment pressure test device and method |
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| CN103176071A (en) * | 2011-12-26 | 2013-06-26 | 比亚迪股份有限公司 | System and method for measuring shutoff temperature of electronic product |
| CN202471286U (en) * | 2012-03-02 | 2012-10-03 | 浙江中环赛特光伏科技有限公司 | Testing system for electrified environment temperature test of solar photovoltaic junction box |
| CN202794445U (en) * | 2012-09-05 | 2013-03-13 | 天津海瑞电子科技有限公司 | Novel high-temperature reverse bias testing machine |
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