CN107181645A - A kind of intelligent household control terminal WiFi communication test system - Google Patents
A kind of intelligent household control terminal WiFi communication test system Download PDFInfo
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- CN107181645A CN107181645A CN201710588374.3A CN201710588374A CN107181645A CN 107181645 A CN107181645 A CN 107181645A CN 201710588374 A CN201710588374 A CN 201710588374A CN 107181645 A CN107181645 A CN 107181645A
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- 238000004891 communication Methods 0.000 title claims abstract description 108
- 238000012360 testing method Methods 0.000 title claims abstract description 99
- 238000002955 isolation Methods 0.000 claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims abstract description 16
- 230000005611 electricity Effects 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 8
- 230000000630 rising effect Effects 0.000 description 6
- 230000001960 triggered effect Effects 0.000 description 4
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- 229910002056 binary alloy Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2803—Home automation networks
- H04L12/2816—Controlling appliance services of a home automation network by calling their functionalities
- H04L12/282—Controlling appliance services of a home automation network by calling their functionalities based on user interaction within the home
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/24—Arrangements for testing
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2803—Home automation networks
- H04L2012/284—Home automation networks characterised by the type of medium used
- H04L2012/2841—Wireless
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- Selective Calling Equipment (AREA)
Abstract
The embodiment of the present application discloses a kind of intelligent household control terminal WiFi communication test system, including：Intelligent household control terminal, WiFi communication test device and power supply；WiFi communication test device includes RS485 chips, interface protective circuit, 2.4G signal adjustment circuits, controller, isolation of system power supply, router and signal acquisition circuit；The test such as the test of WiFi load capacities, the aptitude tests of WiFi common mode communications and WiFi bit rate accuracy can be carried out to intelligent household control terminal, so as to detect the WiFi communication ability of intelligent household control terminal, the fault rate of reduction intelligent household control terminal scene operation.
Description
Technical field
The application is related to technical field of electric power, more particularly to a kind of intelligent household control terminal WiFi communication test system.
Background technology
Smart home be using house as platform, using comprehensive wiring technology, the network communications technology, security precautions technology, from
Dynamic control technology, audio frequency and video technology are integrated by the facility relevant with life staying idle at home, build efficient housing facilities and family's schedule
The management system of affairs, lifting house security, convenience, comfortableness, artistry, and realize the living environment of environmental protection and energy saving.
With the development of 3G and 4G mobile networks, smart mobile phone and mobile universalness level of application are also rapidly increasing,
Mobile phone has been no longer limited to simply converse, but a portable mobility computer.Smart mobile phone etc. is mobile eventually
End is connected together by wireless communication technology with smart home, realizes the control whenever and wherever possible to intelligent home device, this
Bigger imagination space is opened for the expansion of the smart home based on intelligent mobile terminal.
In the all-round popularization and application of intelligent household control terminal, WiFi plays non-as main communication mode
Often important effect, but during on-scene communication, because temperature is different, network node quantity is different, field wiring is different, external environment condition
The influence of each side factors such as interference volume is different, the skew of harvester WiFi communication interface bit rate causes WiFi communication to fail,
In order to ensure the reliability application of the local meter reading of power information acquisition system, the intelligent household control terminal WiFi of complete set is set up
Communication pressure test system is very necessary.
The content of the invention
The application provides a kind of intelligent household control terminal WiFi communication test system, can not be to intelligence to solve prior art
The problem of energy home control terminal WiFi communication capacity is tested.
The embodiment of the present application provides a kind of intelligent household control terminal WiFi communication test system, including：
Intelligent household control terminal, WiFi communication test device and power supply；
The WiFi communication test device includes RS485 chips, interface protective circuit, 2.4G signal adjustment circuits, control
Device, isolation of system power supply, router and signal acquisition circuit；
The 2.4G signal adjustment circuits are connected with the interface protective circuit, the interface protective circuit with it is described
RS485 chips are connected, and the RS485 chips are connected with the controller；
The signal acquisition circuit is connected with the controller；
The router is connected with the isolation of system power supply, and the isolation of system power supply is connected with the controller；
The intelligent household control terminal is provided with the first differential interface and the second differential interface, first differential interface
It is connected with the 2.4G signal adjustment circuits, second differential interface is connected with the router；First differential interface
Circuit between the 2.4G signal adjustment circuits is connected with the signal acquisition circuit；
The power supply is connected with the controller.
Optionally, the WiFi communication test device also includes the load regulation being connected with the 2.4G signal adjustment circuits
Resistance, the load regulation resistance includes：
First resistor, the second resistance connected with the first resistor, the 3rd resistor connected with the second resistance, with
The 4th resistance, the 5th resistance with the 4th resistant series and the 5th resistant series that the 3rd resistor is connected
6th resistance, the 7th resistance with the 6th resistant series, the 8th resistance with the 7th resistant series and the described 8th
Total relay of tenth resistance of the 9th resistance of resistant series and the 9th resistant series and the tenth resistant series,
First relay in parallel with the first resistor, second relay in parallel with the second resistance and the 3rd resistor are simultaneously
5th relay of the 4th relay of the 3rd relay of connection and the 4th resistor coupled in parallel and the 5th resistor coupled in parallel,
The 6th relay with the 6th resistor coupled in parallel, the 7th relay with the 7th resistor coupled in parallel and the 8th resistance
8th relay in parallel and the 9th of the 9th resistor coupled in parallel the is opened and the tenth relay with the tenth resistor coupled in parallel
Device.
Optionally, the load regulation scope of the load regulation resistance is 1~1024 ohm.
Optionally, the power of the load regulation resistance is 3W.
Optionally, the precision of the load regulation resistance is 5%.
Optionally, the load regulation resistance is cement resistor.
Optionally, the first resistor, the second resistance, the 3rd resistor, the 4th resistance, the 5th electricity
The resistance of resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance and the tenth resistance
Value is respectively：1 Ω, 2 Ω, 3.9 Ω, 9.1 Ω, 16 Ω, 32 Ω, 64 Ω, 128 Ω, 256 Ω and 510 Ω.
Optionally, the pressure voltage of the load regulation resistance is more than or equal to 100V.
Optionally, the temperature coefficient of the load regulation resistance is less than or equal to 200ppm.
From above technical scheme, a kind of intelligent household control terminal WiFi communication test that the embodiment of the present application is provided
System, including：Intelligent household control terminal, WiFi communication test device and power supply；WiFi communication test device includes RS485
Chip, interface protective circuit, 2.4G signal adjustment circuits, controller, isolation of system power supply, router and signal acquisition electricity
Road；2.4G signal adjustment circuits are connected with interface protective circuit, and interface protective circuit is connected with RS485 chips, RS485 chips with
Controller is connected；Signal acquisition circuit is connected with controller；Router is connected with isolation of system power supply, isolation of system power supply and control
Device connection processed；Intelligent household control terminal is provided with the first differential interface and the second differential interface, the first differential interface and 2.4G
Signal adjustment circuit is connected, and the second differential interface is connected with router；Between first differential interface and 2.4G signal adjustment circuits
Circuit be connected with signal acquisition circuit；Power supply is connected with controller；The intelligent household control terminal that the embodiment of the present application is provided
WiFi communication test system, the test of WiFi load capacities, WiFi common mode communications ability can be carried out to intelligent household control terminal and is surveyed
The test such as examination and WiFi bit rate accuracy, so as to detect the WiFi communication ability of intelligent household control terminal, reduces intelligence
The fault rate of energy home control terminal filed operation.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the application, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
A kind of structure chart for intelligent household control terminal WiFi communication test system that Fig. 1 provides for the embodiment of the present application.
A kind of load regulation for intelligent household control terminal WiFi communication test system that Fig. 2 provides for the embodiment of the present application
Resistance circuit figure.
A kind of circuit diagram for intelligent household control terminal WiFi communication test system that Fig. 3 provides for the embodiment of the present application.
Fig. 4 carries out WiFi ratios for a kind of intelligent household control terminal WiFi communication test system that the embodiment of the present application is provided
The long figure of high-low level time that special rate accuracy test is obtained.
Fig. 5 carries out WiFi ratios for a kind of intelligent household control terminal WiFi communication test system that the embodiment of the present application is provided
The partial data time duration figure that special rate accuracy test is obtained.
Embodiment
At present, intelligent household control terminal is at the scene in running, often there is that WiFi communication is unstable, communicate into
Power it is low and communication frame losing the problems such as, its mainly by site environment change caused by signal quality be deteriorated, clock frequency occur
Caused by change, data delay change, or because the difference of network node quantity and field wiring causes, or due to collection
The reasons such as adjustment, the adjustment of gathered data of acquisition rate are held to cause.The communications portion of intelligent household control terminal is to signal
Software filtering, load capacity, error code disposal ability, bit rate and dutycycle accuracy, agreement delay the degree of accuracy not enough, may
Be exhausted by the intelligent household control terminal communication resource, communication throughput, Protocol integrity, protocol compatibility not enough cause.
As shown in figure 1, a kind of intelligent household control terminal WiFi communication test system provided for the embodiment of the present application, bag
Include：Intelligent household control terminal 1, WiFi communication test device 2 and power supply 3.
Intelligent household control terminal 1 can be the mobile terminals such as smart mobile phone, and intelligent household control terminal 1 can be by wireless
The communication technology is connected together with smart home, realizes the control whenever and wherever possible to intelligent home device.WiFi communication is tested
Device 2 is used to carry out the test of WiFi load capacities, the aptitude tests of WiFi common mode communications and WiFi to intelligent household control terminal 1
Bit rate accuracy etc. is tested.Power supply 3 is system power supply.
Wherein, the WiFi communication test device 2 includes RS485 chips 21, interface protective circuit 22, the adjustment of 2.4G signals
Circuit 23, controller 24, isolation of system power supply 25, router 26 and signal acquisition circuit 27.
The 2.4G signal adjustment circuits 23 are connected with the interface protective circuit 22, the interface protective circuit 22 and institute
State RS485 chips 21 to connect, the RS485 chips 21 are connected with the controller 24；The signal acquisition circuit 27 with it is described
Controller 24 is connected；The router 26 is connected with the isolation of system power supply 25, the isolation of system power supply 25 and the control
Device 24 processed is connected.
The intelligent household control terminal 1 is provided with the first differential interface 101 and the second differential interface 102, described first
Differential interface 101 is connected with the 2.4G signal adjustment circuits 23, and second differential interface 102 connects with the router 26
Connect；Circuit and the signal acquisition circuit 27 between first differential interface 101 and the 2.4G signal adjustment circuits 23
Connection.The power supply 3 is connected with the controller 24.
A kind of main test philosophy for intelligent household control terminal WiFi communication test system that the embodiment of the present application is provided
It is as follows：Host computer test software transmitting order to lower levels makes it be led to intelligent household control terminal 1 to WiFi communication test device 2
Letter.WiFi communication test device 2 is received by load regulation resistance to switch after the instruction of host computer and loaded, and is tested out and intelligence
The limit communication load capacity of home control terminal 1.
Power supply 3 is used to provide operating voltage, and controller 24 is used to control RS485 chips 21, isolation of system power supply 25, route
Device 26, signal acquisition circuit 27 and 2.4G signal adjustment circuits 23.Wherein, the test point 201 of 2.4G signal adjustment circuits 23 first
WiFi2.4G packets are sent to intelligent household control terminal 1, the 3rd test point of synchronous signal Acquisition Circuit 27 203 is synchronous to be received
Data, router 26 receives the packet that intelligent household control terminal 1 is sent, and compares the data of router 26 and signal acquisition circuit
27 received signals, when accurate test WiFi communication test device 2 communicates with intelligent household control terminal 1, signal acquisition electricity
First test point 201 of the seizure of road 27, the second test point 202, the instantaneous level signal intensity of the signal of the 3rd test point 203 continue
Time, to judge the limit communication load capacity of intelligent household control terminal 1.
Specifically, as shown in Fig. 2 the WiFi communication test device 2 also includes and the 2.4G signal adjustment circuits 23
The load regulation resistance of connection, the load regulation resistance includes：
First resistor 41, the second resistance 42 connected with the first resistor 41, connected with the second resistance 42
Three resistance 43, the 4th resistance 44 connected with the 3rd resistor 43, the 5th resistance 45 connected with the 4th resistance 44, with
6th resistance 46 of the 5th resistance 45 series connection, the 7th resistance 47 connected with the 6th resistance 46 and the described 7th electricity
8th resistance 48 of the series connection of resistance 47, the 9th resistance 49 connected with the 8th resistance 48, connect with the 9th resistance 49
Tenth resistance 50, the total relay 70 connected with the tenth resistance 50, first relay in parallel with the first resistor 41
51st, second relay 52 in parallel with the second resistance 42, threeth relay 53 in parallel with the 3rd resistor 43 and institute
State the 4th relay 54 in parallel of the 4th resistance 44, fiveth relay 55 in parallel with the 5th resistance 45 and the described 6th
The 6th relay 56 in parallel of resistance 46, seventh relay 57 in parallel with the 7th resistance 47 and the 8th resistance 48
In parallel the 8th relay 58, nineth relay 59 in parallel with the 9th resistance 49 and in parallel with the tenth resistance 50
The tenth relay 60.
In the present embodiment, the load regulation scope of the load regulation resistance is 1~1024 ohm, the load regulation
The power of resistance is 3W, and the precision of the load regulation resistance is 5%, and the load regulation resistance is cement resistor, described negative
The pressure voltage for carrying regulation resistance is more than or equal to 100V, and the temperature coefficient of the load regulation resistance is less than or equal to 200ppm.
Specifically, the first resistor 41, the second resistance 42, the 3rd resistor 43, the 4th resistance 44, institute
State the 5th resistance 45, the 6th resistance 46, the 7th resistance 47, the 8th resistance 48, the 9th resistance 49 and
The resistance value of tenth resistance 50 is respectively：1 Ω, 2 Ω, 3.9 Ω, 9.1 Ω, 16 Ω, 32 Ω, 64 Ω, 128 Ω, 256 Ω with
And 510 Ω.
A kind of intelligent household control terminal WiFi communication test system provided using the embodiment of the present application, can be to intelligent family
Occupy control terminal 1 and carry out WiFi load capacity tests.
Using the intelligent household control terminal of row WiFi group-net communications, when network node exceedes certain amount, data are received
Hair can fail.Because WiFi communication is bus networking mode, when network node is too many, intelligent household control terminal receives impedance too
Small or WiFi sends the driving force signal on the weak side that can cause transmission and is unsatisfactory for WiFi communication characteristic, and it is intelligence to trace it to its cause
Home control terminal WiFi, which receives impedance and sends driving force design redundancy, not enough to be caused.
WiFi load capacity method of testings are carried out to intelligent household control terminal 1 as follows：In 2.4G signal adjustment circuits 23
Load regulation resistance is connect on interface, to simulate the communication operating mode of multiple network node.Pass through the adjustment of load electricity of pressure test module
Road internal relay incrementally increases load impedance, and whether monitoring WiFi communication succeeds in real time, tests out intelligent household control terminal
WiFi limit load capacity, while test data is uploaded into upper computer software.
The embodiment of the present application is connected using 10 resistance of resistance, and selectivity short circuit is carried out using 10 relays, can
Allot 1~1024 ohm of load resistance.Tested by the intelligent household control terminal to different manufacturers, its test data
As shown in Table 1 and Table 2.
Table 1
Table 2
For the accuracy of checking test, applied in the intelligent household control terminal of three-phase kilowatt-hour meter producer 2, producer 4, producer 10
Plus in the case that limit load does not communicate, the data waveform of communication is caught with oscillograph, measure WiFi communication survey
2 waveforms for only sending data are put in trial assembly, and waveform of the producer's intelligent household control terminal 1 without reply data, it is possible thereby to
Judge, apply after resistive load, intelligent household control terminal 1 receives the too small failure that result in communication of impedance, rather than WiFi leads to
The letter inside WiFi of test device 2, which receives data failure, to be caused, and ensures that WiFi pressure communication modules load capacity tests number
According to validity.
Producer's intelligent household control terminal on can still communicating is loaded for applying 1 Ω in Tables 1 and 2, illustrates its WiFi
Load capacity is stronger；Do not communicated for what producer in form 15 tested less than 125 Ω, illustrate that its load capacity is on the weak side.It is actual
WiFi communication chip used in the producer of each in product is mostly different, and different chip internals receive input impedance and sent and drive
Kinetic force also difference.
A kind of intelligent household control terminal WiFi communication test system provided using the embodiment of the present application, can be to intelligent family
Occupy control terminal 1 and carry out WiFi common mode communication aptitude tests.
Isolate on the WiFi communication Interface Electrical of intelligent household control terminal 1 with power network, due to intelligent household control terminal 1
Installation environment it is different, each system has each independent earthed system.And when euclidean distance between node pair is far, exist between node
Common-mode voltage, the common-mode voltage of receiver input may have very big amplitude (more than ten volts or even tens of volts), and may
With high reject signal, cause receiver exceeds normal scope, and the generation interference electricity on signal wire to public ground voltage
Stream, gently then influence WiFi communication failure, heavy then damage WiFi communication mouthful.
The method for carrying out WiFi common mode communication aptitude tests to intelligent household control terminal 1 is as follows：WiFi communication is tested
Device 2 expands the COM ends of WiFi interfaces, and COM ends are exactly ground terminal (R5, R6, C12, C13, C14, C15, C6, C7 etc. in Fig. 3
End), it is connected with the COM ends of intelligent household control terminal WiFi interfaces, while first differential interface 101 and the 2.4G
Signal adjustment circuit 23 is connected, and second differential interface 102 is connected with the router 26；First differential interface 101
Circuit between the 2.4G signal adjustment circuits 23 is connected with the signal acquisition circuit 27, and electricity is exported by common-mode voltage
Road makes the GND of the GND of the inside WiFi chip of WiFi communication test device 2 and the WiFi chip of external smart home control terminal 1
There is a difference, so that it is adjustable to realize that the inside WiFi differential lines of intelligent household control terminal 1 reach to the input voltage at COM ends
The purpose of section, whether monitoring WiFi communication succeeds in real time, so that the WiFi limit common mode for testing out intelligent household control terminal 1 is led to
Letter ability.
Specifically, by switching relay, the anode S1 of common mode output circuit is switched into intelligent household control terminal 1
COM ends, the WiFi_GND that the negative terminal S2 of common mode output circuit is switched to inside WiFi communication test device 2, while regulation is altogether
DC inside mould output circuit DC produce 0~32V common mode malleation.By switching relay, by common mode output circuit just
End S1 switches to pressure test inside modules WiFi_GND, and it is whole that the negative terminal S2 of common mode output circuit is switched into Intelligent housing
The COM ends at end 1, at the same adjust DC inside common mode output circuit DC produce 0~32V common mode negative pressure.To different manufacturers
Intelligent household control terminal test result is as shown in table 3.
Table 3
It is due to external smart home control terminal WiFi in order to ensure applying the reason for common-mode voltage causes not communicate
The first differential interface 101 and the second differential interface 102 connecting line A, B line relative to COM ends input voltage exceed allow
Scope causes, therefore is applied with numerous safeguard measures to A, B line internal interface of WiFi communication test device 2, on the one hand avoids
The inside of WiFi communication test device 2 and the differential lines of the first differential interface 101 and the second differential interface 102 are punctured by common-mode voltage
Burn, on the other hand ensure that WiFi communication test device 2 receives common-mode voltage, in safe range dependable communication.Also,
In the case of causing communication failure to the application limit common-mode voltage of intelligent household control terminal 1, the first difference is connect with oscillograph
Mouth 101 and the communication data of the differential lines of the second differential interface 102 are caught, and are measured only WiFi communication test device 2 and are sent
Data and without intelligent household control terminal 1 send reply data, so as to ensure that the real effectiveness of integrated testability data.
In actual applications, differential lines have TVS, thermistor with COM ends inside each producer's intelligent household control terminal
Etc. protection device, and the WiFi communication chip that each producer selects also is differed more, so test result is uneven.For
Apply common-mode voltage≤- 32V or >=32V and the producer of communication issue also do not occur, illustrate right inside intelligent household control terminal
It is relatively good in the protection of common-mode voltage and antijamming capability, due to by the application common mode electricity designed by WiFi communication test device 2
The limitation of scope is pressed, and worries that application common-mode voltage is too big, WiFi communication chip inside intelligent household control terminal can be burnt,
So common-mode voltage applies test to ± 32V.Single-phase meter does not have COM ends not do common-mode voltage limit test experiment then.
A kind of intelligent household control terminal WiFi communication test system provided using the embodiment of the present application, can be to intelligent family
Occupy control terminal 1 and carry out the test of WiFi bit rates accuracy.
Intelligent household control terminal is in Software for Design, due to bit rate redundancy not enough, or due to humiture change, it is interior
Minor variations occur for the delay of portion circuit signal, just occur that bit rate is above standard requirement, so as to cause meter reading to fail.For intelligence
The main bit every in reply data frame of accuracy of energy home control terminal bit rate average length of time and unit bit height,
Evaluated and tested in terms of low level time span two.
WiFi bit rate accuracy method of testings are carried out to intelligent household control terminal 1 as follows：WiFi communication is tested and filled
Put 2 differential lines and the first differential interface 101 of external smart home control terminal 1 and the second differential interface 102 are corresponding connected
Connect, the double-throw relay in WiFi communication test device 2 inside signal acquisition circuit 27 is switched on A, B line, host computer leads to
The copy reading orders of DL/T 645 that WiFi communication test device 2 issues fixed baud rate to intelligent household control terminal 1 are crossed, WiFi leads to
Believe that the internal signal Acquisition Circuit 27 of test device 2 catches the reply data frame of intelligent household control terminal 1, lead in a frame data
Cross the change to the rising edge and trailing edge of A, B line level and interrupted to trigger and stop, intercepting a part of data rising edge with
Total time T (total) on edge is dropped, then by software inhouse calculation formula, show that the average time in a frame data per bit is approximate
Value T (actual bit).
Specific formula for calculation is as follows：
M=T (total)/T (theoretical per bit) (1)
T (actual per bit)=T (total)/N (2)
Wherein, M is receives the theoretical binary system total bit of a frame data, and T (total) is by intercepted in a frame data one
The total time of divided data, T (theoretical bit) is the binary unit bit of communication bit rate theoretical time.Example：2400bps ratio
Special rate, then ≈ 416.667us of T (theoretical per bit)=1/2400.N is the integer after M rounds up, and is that the partial data is total
Actual binary data bits in time.The binary system of a frame data of the T (actual per bit) to calculate is flat per bit
Equal time proximity.
For the judgement of the high and low level duty cycle times of every bit, triggered if interrupted by rising edge, program is just opened
The measurement for the high-level pulse width that begins：The time that rising edge occurs is recorded, triggering mode is changed to trailing edge in interruption
Triggering, and spilling counter is emptied, triggered until interrupting by trailing edge, represent to reach the end of pulse, program record trailing edge
Time of occurrence, the time width of every bit high level pulses is calculated using above formula (1) and (2).The like, if in
Disconnected to be triggered by trailing edge, program just starts the measurement of a low level pulse width：The time that trailing edge occurs is recorded,
Triggering mode is changed to rising edge triggering in interruption, and empties spilling counter, is triggered until interrupting by rising edge, represents to reach
The end of low level pulse, program record trailing edge time of occurrence, using above formula (1) and (2), then can calculate every bit
The time width of low level pulse.
Table 4 is the situation in default communication bit rate 2400bps to the intelligent household control terminal bit rates of different manufacturers
The test case of precision, the test for other bit rate precision is repeated no more, and its method of testing is identical；Time numerical approximation
0.1us。
Table 4
In order to verify the accuracy of pressure test module testing bit rate data, with oscillograph to the smart home control of producer 6
The communication data of terminal processed is caught, and unit bit low level time is 436.4us, unit bit as can be seen from Figure 4
High level time be 400.0us.Partial data time span from Fig. 5 in one frame data is 37.48ms, can be used above 1.
Released with formula 2., average time of the frame data per bit is 316.4us.It is possible thereby to judge that pressure test module is measured
Data and actually measured data match.For intelligent household control terminal default communication bit rate 2400bps, every bit's
Time is about 416.667us.From the test result of above producer, if according to intelligent household control terminal producer for than
The requirement of the special general internal control 3% of rate, then the average every bit times for receiving a frame data are to meet to require, but for unit bit
The time of adjacent high and low level is then above scope.
From above technical scheme, a kind of intelligent household control terminal WiFi communication test system that application embodiment is provided
System, including：Intelligent household control terminal 1, WiFi communication test device 2 and power supply 3；WiFi communication test device 2 includes
RS485 chips 21, interface protective circuit 22,2.4G signal adjustment circuits 23, controller 24, isolation of system power supply 25, router
26 and signal acquisition circuit 27；2.4G signal adjustment circuits 23 are connected with interface protective circuit 22, interface protective circuit 22 with
RS485 chips 21 are connected, and RS485 chips 21 are connected with controller 24；Signal acquisition circuit 27 is connected with controller 24；Router
26 are connected with isolation of system power supply 25, and isolation of system power supply 25 is connected with controller 24；Intelligent household control terminal 1 is provided with
One differential interface 101 and the second differential interface 102, the first differential interface 101 are connected with 2.4G signal adjustment circuits 23, and second is poor
Tap mouth 102 is connected with router 26；Circuit between first differential interface 101 and 2.4G signal adjustment circuits 23 is adopted with signal
Collector 27 is connected；Power supply 3 is connected with controller 24；The intelligent household control terminal WiFi communication that the embodiment of the present application is provided is surveyed
Test system, can carry out the test of WiFi load capacities, the aptitude tests of WiFi common mode communications and WiFi to intelligent household control terminal
Bit rate accuracy etc. is tested, so as to detect the WiFi communication ability of intelligent household control terminal, reduces Intelligent housing
The fault rate of terminal filed operation.
Above-described the application embodiment does not constitute the restriction to the application protection domain.
Claims (9)
1. a kind of intelligent household control terminal WiFi communication test system, it is characterised in that including：
Intelligent household control terminal (1), WiFi communication test device (2) and power supply (3)；
The WiFi communication test device (2) includes RS485 chips (21), interface protective circuit (22), 2.4G signals adjustment electricity
Road (23), controller (24), isolation of system power supply (25), router (26) and signal acquisition circuit (27)；
The 2.4G signal adjustment circuits (23) are connected with the interface protective circuit (22), the interface protective circuit (22) with
RS485 chips (21) connection, the RS485 chips (21) are connected with the controller (24)；
The signal acquisition circuit (27) is connected with the controller (24)；
The router (26) is connected with the isolation of system power supply (25), the isolation of system power supply (25) and the controller
(24) connect；
The intelligent household control terminal (1) is provided with the first differential interface (101) and the second differential interface (102), described
One differential interface (101) is connected with the 2.4G signal adjustment circuits (23), second differential interface (102) and the route
Device (26) is connected；Circuit and the letter between first differential interface (101) and the 2.4G signal adjustment circuits (23)
The connection of number Acquisition Circuit (27)；
The power supply (3) is connected with the controller (24).
2. a kind of intelligent household control terminal WiFi communication test system as claimed in claim 1, it is characterised in that described
WiFi communication test device (2) also includes the load regulation resistance being connected with the 2.4G signal adjustment circuits (23), described negative
Carrying regulation resistance includes：
First resistor (41), the second resistance (42) connected with the first resistor (41), connect with the second resistance (42)
3rd resistor (43), connected with the 3rd resistor (43) the 4th resistance (44), connect with the 4th resistance (44)
5th resistance (45), the 6th resistance (46) connected with the 5th resistance (45), connected with the 6th resistance (46)
Seven resistance (47), the 8th resistance (48) connected with the 7th resistance (47), the 9th connected with the 8th resistance (48)
Resistance (49), the tenth resistance (50) connected with the 9th resistance (49), the total relay connected with the tenth resistance (50)
Device (70), first relay (51) in parallel with the first resistor (41), in parallel with the second resistance (42) second after
Electrical equipment (52), threeth relay (53) in parallel with the 3rd resistor (43), the in parallel with the 4th resistance (44) the 4th
Relay (54), fiveth relay (55) in parallel with the 5th resistance (45), in parallel with the 6th resistance (46)
It is six relays (56), seventh relay (57) in parallel with the 7th resistance (47), in parallel with the 8th resistance (48)
8th relay (58), nineth relay (59) in parallel with the 9th resistance (49) and with the tenth resistance (50) simultaneously
Tenth relay (60) of connection.
3. a kind of intelligent household control terminal WiFi communication test system as claimed in claim 2, it is characterised in that described negative
The load regulation scope for carrying regulation resistance is 1~1024 ohm.
4. a kind of intelligent household control terminal WiFi communication test system as claimed in claim 3, it is characterised in that described negative
The power for carrying regulation resistance is 3W.
5. a kind of intelligent household control terminal WiFi communication test system as claimed in claim 4, it is characterised in that described negative
The precision for carrying regulation resistance is 5%.
6. a kind of intelligent household control terminal WiFi communication test system as claimed in claim 5, it is characterised in that described negative
It is cement resistor to carry regulation resistance.
7. a kind of intelligent household control terminal WiFi communication test system as claimed in claim 6, it is characterised in that described the
One resistance (41), the second resistance (42), the 3rd resistor (43), the 4th resistance (44), the 5th resistance
(45), the 6th resistance (46), the 7th resistance (47), the 8th resistance (48), the 9th resistance (49) and
The resistance value of tenth resistance (50) is respectively：1Ω、2Ω、3.9Ω、9.1Ω、16Ω、32Ω、64Ω、128Ω、256Ω
And 510 Ω.
8. a kind of intelligent household control terminal WiFi communication test system as claimed in claim 7, it is characterised in that described negative
The pressure voltage for carrying regulation resistance is more than or equal to 100V.
9. a kind of intelligent household control terminal WiFi communication test system as claimed in claim 8, it is characterised in that described negative
The temperature coefficient for carrying regulation resistance is less than or equal to 200ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710588374.3A CN107181645A (en) | 2017-07-19 | 2017-07-19 | A kind of intelligent household control terminal WiFi communication test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710588374.3A CN107181645A (en) | 2017-07-19 | 2017-07-19 | A kind of intelligent household control terminal WiFi communication test system |
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| Publication Number | Publication Date |
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| CN107181645A true CN107181645A (en) | 2017-09-19 |
Family
ID=59838369
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710588374.3A Pending CN107181645A (en) | 2017-07-19 | 2017-07-19 | A kind of intelligent household control terminal WiFi communication test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108495326A (en) * | 2018-04-26 | 2018-09-04 | 上海移远通信技术股份有限公司 | The test method and test system of WIFI modules |
| CN110225562A (en) * | 2019-07-09 | 2019-09-10 | 杭州叙简安智信息技术有限公司 | A method of it is automatically adjusted and is surfed the Internet according to actual scene |
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| CN108495326A (en) * | 2018-04-26 | 2018-09-04 | 上海移远通信技术股份有限公司 | The test method and test system of WIFI modules |
| CN110225562A (en) * | 2019-07-09 | 2019-09-10 | 杭州叙简安智信息技术有限公司 | A method of it is automatically adjusted and is surfed the Internet according to actual scene |
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