CN103052107A - Receiving limit value testing method for sensor network node - Google Patents
Receiving limit value testing method for sensor network node Download PDFInfo
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- CN103052107A CN103052107A CN2012105598741A CN201210559874A CN103052107A CN 103052107 A CN103052107 A CN 103052107A CN 2012105598741 A CN2012105598741 A CN 2012105598741A CN 201210559874 A CN201210559874 A CN 201210559874A CN 103052107 A CN103052107 A CN 103052107A
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Abstract
The invention discloses a receiving limit value testing method for a sensor network node. The receiving limit value testing method for the sensor network node is characterized in that a module to be tested is connected with a vector signal generator through an SMA (SubMiniature version A) interface, the module to be tested is connected with a PC (Personal Computer) through an RS232 serial port and the vector signal generator is connected with the PC through a GPIB/LAN (General Purpose Interface Bus/Local Area Network) interface. By controlling the vector signal generator through an operating interface designed by using a VB (Visual Basic) program and by enabling the VB operating interface to be connected with the vector signal generator through an LAN interface, the cockamamie instrument configuration process is replaced by the interface which is simple and clear to operate and the time and the cost can be greatly saved during batch testing. Moreover, since some fixed configurations are completed during initialization and several configurable variable parameters are only displayed on the interface, the complexity of the testing system is greatly reduced, the loss caused by artificial factors is avoided during testing and the accuracy of instrument testing is improved.
Description
Technical field
The present invention relates to a kind of wireless sensor network physical layer field tests, be specifically related to a kind of sensor network nodes receiving pole limit test method that realizes based on automatic control.
Background technology
In the information-intensive society of current develop rapidly, semiconductor technology and the communication technology have entered into the various aspects of our life, and along with development information-based, globalization, technology of wireless sensing network also becomes the demand of people's an urgent demand gradually.In the past, the WLAN (wireless local area network) slower development was applied difficulty, mainly was because transmission rate is low, cost is high, and a lot of product is incompatible etc.Data service and demand for present rapid growth, the key that WLAN (wireless local area network) makes progress just is the formulation of high speed new standard IEEE 802.11b, but IEEE 802.11b networking cost is higher, is mainly used in building LAN (Local Area Network) and supports the mass data transmission.
The bandwidth of IEEE 802.11b WLAN (wireless local area network) reaches as high as 11Mbps, than fast 5 times of IEEE 802.11 standards in firm when approval, has enlarged the application of WLAN (wireless local area network).What IEEE 802.11b used is open 2.4GHz frequency range, does not need application just can use.Have that transmission range is long, speed is fast, can satisfy the network operation that the user moves a large amount of occupied bandwidths, but along with the appearance of people to the demand of simple and convenient, the wireless device that can arbitrarily use, cheap price and lower energy consumption will be important factors, also need a new standard to carry out standard simultaneously.And the demand of the communication near several meters scopes people self that this standard proposes mainly for people, its key problem is low-power consumption, designs and provide the application of low bandwidth, low rate cheaply.
IEEE 802.15.4 network refers in a POS to use same wireless channel and the set of one group of equipment intercoming mutually by IEEE 802.15.4 standard, has another name called the LR-WPAN network.In March, 1998, set up IEEE 802.15 working groups.This group is devoted to the physical layer (PHY) of WPAN network and the standardization effort of media access layer (MAC), target is to provide communication standard for the Wireless Telecom Equipment that intercoms mutually in individual operating space (POS), general indoor communications does not wait outdoor ultimate range 150m apart from 10m ~ 30m.The LR-WPAN network of IEEE 802.15.4 standard definition has under different carrier frequencies characteristics such as realizing three kinds of different transmission rates, support star-like and point-to-point two kinds of communication network topology structures, 16 and 64 two kinds of address formats and the carrier wave multichannel of supporting conflict to avoid are intercepted.
IEEE 802.15.4b(ZigBee) can be described as the brother of the same clan of bluetooth, its uses 2.4GHz wave band, adopts frequency modulation technology.But compare with bluetooth, simpler, speed is slower, power and power consumption are also lower.Its basic rate is 250kb/s, and when being reduced to 28kb/s, transmission range can expand 134m to and obtain higher reliability.In addition, it can also be networked with 254 nodes, and comparable bluetooth is better supported the automation family expenses such as game, consumer electronics.
In sum, IEEE 802.15.4b(ZigBee) have simpler, speed is slower, also lower characteristics of power and power consumption.Therefore the performance of its receiving pole limit value also seems particularly important in short-distance transmission, its frequency range is by 2.405GHz ~ 2.48GHz totally 26 channels, different channels in the test process of receiving pole limit value, it is particularly complicated that the switching of the variablees such as different frequency range and different pieces of information speed becomes, cause testing cost to improve, the wasting manpower and material resources, and the test configurations process is complicated, and the fault rate that causes being caused by human factor improves.
Summary of the invention
The object of the invention is to provide a kind of sensor network nodes receiving pole limit test method, and testing cost was high when it can effectively solve system testing, the problems such as uncertainty of human factor in the instrument configuration process that the test process complexity causes.
In order to solve these problems of the prior art, technical scheme provided by the invention is:
A kind of sensor network nodes receiving pole limit test method, module to be measured in the sensor network nodes receiving pole limit test method links to each other with vector signal generator by the SMA interface, module to be measured links to each other with PC by the RS232 serial ports, vector signal generator links to each other with PC by the GPIB/LAN interface, and concrete method of testing comprises tells lower step:
I, PC realize meeting transmitting of IEEE 802.15.4;
II, PC download to the wave file that generates in the vector signal generator by GPIB/LAN interface Long-distance Control vector signal generator;
III, PC are modulated to vector signal generator the frequency of channel to be measured by GPIB/LAN interface Long-distance Control vector signal generator;
IV, PC are transferred to suitable size (be defined as module to be measured according to the Sensor Network physical layer initial value is set) by GPIB/LAN interface Long-distance Control vector signal generator with the amplitude output signal of vector signal generator;
V, PC change the working channel of module to be measured by the RS-232 serial ports, make module be in accepting state;
VI, PC are by GPIB/LAN interface Long-distance Control vector signal generator, triggering signal;
VII, PC are inquired about the situation that module to be measured receives signal by the RS-232 serial ports.
For technique scheme, the inventor also has further optimization embodiment.
As optimization, in step I, II, IV, the V, PC can pass through GPIB/LAN interface Long-distance Control vector signal generator.
As optimization, described vector signal generator is Agilent E4438C vector signal generator.Described Agilent E4438C vector signal generator is by providing excellent baseband signal to reach new performance level.It has wide RF modulation bandwidth, fast sample rate and large memories, this instrument can provide the Digital Modulation of analog-modulated, employing standard and customization standard, excellent level precision and spectral purity, E4438C provides the frequency coverage of 250KHz ~ 6GHz simultaneously, can meet the specific (special) requirements of WLAN (wireless local area network).Agilent E4438C also has the various control interface simultaneously: Ethernet control interface (10BaseT LAN), general-purpose interface bus (GPIB), asynchronous transmission standard interface (RS-232) etc., can realize easily Long-distance Control, and carry out automatic test.If E4438C has installed inner base band generator (option 601 or option 602), can utilize this AWG (Arbitrary Waveform Generator) to produce the random waveform of test needs according to requirement oneself customization of survey wireless sensor network node.
As optimization, the control that described PC provides the tester to carry out automatic test, PC can pass through the parameters such as VB interface real time altering signal source transmitting power, channel to be measured, transmitted data rates by LAN interface, and by triggering signal source is configured.
Further, described PC links to each other with module to be measured by the RS-232 serial ports, but real time altering module communication channel to be measured.
With respect to scheme of the prior art, advantage of the present invention is:
Sensor network nodes receiving pole limit test method described in the invention, its operation interface by the VB programming is controlled vector signal generator, by LAN interface the VB operation interface is connected with vector signal generator, so that loaded down with trivial details configure instrument process is replaced by clear interface simple to operate, a large amount of time and cost can when batch testing, have been saved.Simultaneously some fixed configurations are finished in initialization, only shown the several variable parameters that to join on the interface, greatly reduce the complexity of test macro, avoid in the test process because the loss that human factor causes, improved the accuracy rate of instrument test.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is the system architecture diagram of the embodiment of the invention;
Fig. 2 is the spectrogram of the channel signal to be measured of vector signal generator output in the embodiment of the invention;
Fig. 3 is the circuit diagram of module to be measured in the embodiment of the invention;
Fig. 4 is the workflow diagram of the embodiment of the invention;
Fig. 5 is the system control interface figure in the embodiment of the invention;
Fig. 6 is the final form that comprises test result that generates in the embodiment of the invention.
Embodiment
Below in conjunction with specific embodiment such scheme is described further.Should be understood that these embodiment are not limited to limit the scope of the invention for explanation the present invention.The implementation condition that adopts among the embodiment can be done further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in the normal experiment.
Embodiment:
Present embodiment has been described a kind of sensor network nodes receiving pole limit test system, system configuration as shown in Figure 1 in the sensor network nodes receiving pole limit test method, wherein, module to be measured links to each other with vector signal generator by the SMA interface, module to be measured links to each other with PC by the RS232 serial ports, and vector signal generator links to each other with PC by the GPIB/LAN interface.
Present embodiment is controlled the vector signal source by VB, produce the measured signal of one tunnel channel to be measured, the test process of limiting value is carried out the optimization of system, not only saved a large amount of manpower and materials, also reduce simultaneously the complexity of test process, improved the accuracy rate of instrument test.Its module to be measured is connected with vector signal generator by the SMA interface, and vector signal generator links to each other with PC by the GPIB/LAN interface, and module to be measured links to each other with PC by the RS-232 serial ports.
When test module receiving pole limit value to be measured, we mainly record two parameters:
(1) receiving sensitivity: test channel adopts IEEE 802.15.4 signals specification, under given channel and data rate conditions, records receiver at the lower minimum levels signal that can detect of 1% packet loss.
(2) maximum incoming level: when received signal strength is excessive, module to be measured can fall to receive signal by automatic shield, test channel adopts IEEE 802.15.4 signals specification, under given channel and data rate conditions, records receiver at the lower maximum level signal that can detect of 1% packet loss.
At first PC is by GPIB/LAN interface Long-distance Control, the signal data file that meets IEEE 802.15.4 standard of writing by the VB simulation software on the PC is downloaded in the vector signal source, then some of initialization vector signal source are fixedly installed, and set up long-range connection and the initialization concrete steps are as follows:
1. set up PC to the long-range connection of instrument;
2. reset the vector signal source;
3. open the modulation demodulation system in vector signal source;
4. open radio frequency output;
5. filter type is set;
6. chip rate is set;
7. modulation system is set;
8. trigger mode is set;
9. open user (custom) pattern;
10. the wave file of call signal.
After the initialization, the measured signal that module is set changes the output frequency of instrument accordingly, and the change channel procedure of module is as follows:
The channel of instrument is set;
The signal output intensity of instrument is set;
Trigger the output of vector signal source signal.
After triggering the output of vector signal source signal, the number of the bag that PC is received in the serial ports inspection, according to IEEE 802.15.4 standard, when 1000 bags of transmission, the rate of false alarm of module is less than in 1% the situation, the minimum radius that SMA end can receive is the receiving sensitivity of this module, and requires receiving sensitivity less than-85dBm.So when not understanding the receptivity of module to be measured, can be from the output amplitude of-85dBm circulation lowering apparatus, test obtains the receiving sensitivity of module to be measured.
After triggering the output of vector signal source signal, the number of the bag that PC is received in the serial ports inspection is according to IEEE 802.15.4 standard, when 1000 bags of transmission, the Packet Error Ratio of module is less than in 1% the situation, and the amplitude peak that the SMA end can receive is the maximum incoming level of this module.When not understanding the receptivity of module to be measured, can be from the circulate output amplitude of lowering apparatus of 0dBm, test obtains the maximum incoming level of module to be measured.
Be the signal spectrum figure of vector signal generator output as shown in Figure 2, the output in vector signal source received on the frequency spectrograph by the radio frequency connecting line of SMA-SMA that Fig. 2 arranges as follows frequency spectrograph relevant:
1. centre frequency (CF) is 2.405GHz;
2. bandwidth (SPAN) is 1MHz;
3. RBW=20KHz，VBW=20KHz。
The circuit diagram of the present invention's module to be measured as shown in Figure 3.Wherein external processing unit (MCU unit) is connected by bus with wireless transmit/receive units, and the two formation can realize the Wireless Data Transmission of various functions.A SoC chip MC13213 that is provided by Freescale has been provided this example, this integrated chip the wireless transmit/receive units of MCU microprocessor unit and 2.4GHz.Be connected by the SPI serial bus between the wireless transmit/receive units of MCU microprocessor unit and 2.4GHz.The MCU microprocessor unit is the processor of one 8 HCS08 kernel, a series of functions such as universal serial port and timing/timer that it is integrated.The Frequency Band Selection of wireless transmit/receive units be the ISM band of 2.4GHz, its physical layer is that the standard according to IEEE802.15.4 designs, its message transmission rate is 250kbps, this frequency band division is 16 channels, each channel accounts for the bandwidth of 5MHz.Adopt the modulation system of direct sequence spread spectrum (DSSS) and O-QPSK, improved the antijamming capability of wireless signal.PC can send configuration information to module to be measured by RS-232 interface, mode of operation for example, working channel, power output etc.Module links to each other with the vector signal source by SMA, receives the signal that send in the vector signal source.Test module receiving pole limit value to be measured.
Be the workflow diagram of the test macro of sensor network nodes receiving pole limit value of the present invention as shown in Figure 4, it is according to IEEE 802.15.4 code requirement, to the maximum of 16 channels of module to be measured, the checking property testing of minimum incoming level.After the test beginning, first to the initialization of vector signal source, then select " channel 11 ", Initial Trans " 85dBm ", then program begins first test " channel 11 ", dispose module channel to be measured by serial ports, output frequency by GPIB/LAN mouth configure instrument, the wave file in vector signal source of setting out (comprises 1000 test packs in the file, add a plurality of cycle time-delays between bag and the bag), module to be measured can be told the RS-232 serial ports with the bag that receives, whether PC judges greater than 990 whether module to be measured passes through the receiving pole limit test of this channel by the number that the inspection serial ports receives bag, test result will show by EXCEL automatically, " channel 1 " test is over, test " channel 2 ", the like ... until 16 channel tests are finished.
The control surface chart of sensor network nodes receiving pole limit test of the present invention system as shown in Figure 5, " serial ports " in the interface filled in the communication serial port number of module to be measured and PC, test has channel options and power output options in the hurdle, can fill in the test index of module, default value is according to the index that requires in the IEEE 802.15.4 standard.Click " Trigger " (triggering) control, test macro of the present invention will begin automatically test, and test result is kept in the Microsoft Excel, automatically as shown in Figure 6.
Through experimental test, test macro and the method for the sensor network nodes receiving pole limit value that the present invention is designed are applied in the experiment test, not only realized the optimization to traditional sensor network nodes receiving pole limit test system, greatly reduce the cost that carries out the receiving pole limit test, reduce simultaneously the complexity of test macro, improved accuracy and the testing efficiency of test result.
Above-mentioned example only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the people who is familiar with technique can understand content of the present invention and according to this enforcement, can not limit protection scope of the present invention with this.All equivalent transformations that Spirit Essence is done according to the present invention or modification all should be encompassed within protection scope of the present invention.
Claims (5)
1. sensor network nodes receiving pole limit test method, it is characterized in that, module to be measured in the sensor network nodes receiving pole limit test method links to each other with vector signal generator by the SMA interface, module to be measured links to each other with PC by the RS232 serial ports, vector signal generator links to each other with PC by the GPIB/LAN interface, and concrete method of testing comprises tells lower step:
I, PC realize meeting transmitting of IEEE 802.15.4;
II, PC download to the wave file that generates in the vector signal generator by GPIB/LAN interface Long-distance Control vector signal generator;
III, PC are modulated to vector signal generator the frequency of channel to be measured by GPIB/LAN interface Long-distance Control vector signal generator;
IV, PC are transferred to suitable size by GPIB/LAN interface Long-distance Control vector signal generator with the amplitude output signal of vector signal generator;
V, PC change the working channel of module to be measured by the RS-232 serial ports, make module be in accepting state;
VI, PC are by GPIB/LAN interface Long-distance Control vector signal generator, triggering signal;
VII, PC are inquired about the situation that module to be measured receives signal by the RS-232 serial ports.
2. sensor network nodes receiving pole limit test method according to claim 1 is characterized in that, in step I, II, IV, the V, PC can pass through GPIB/LAN interface Long-distance Control vector signal generator.
3. sensor network nodes receiving pole limit test method according to claim 1 and 2 is characterized in that, described vector signal generator is Agilent E4438C vector signal generator.
4. sensor network nodes receiving pole limit test method according to claim 1, it is characterized in that, described PC provides the tester to carry out the control of automatic test, PC can pass through the parameters such as VB interface real time altering signal source transmitting power, channel to be measured, transmitted data rates by LAN interface, and by triggering signal source is configured.
5. sensor network nodes receiving pole limit test method according to claim 1 is characterized in that, described PC links to each other with module to be measured by the RS-232 serial ports, but real time altering module communication channel to be measured.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326895A (en) * | 2013-05-30 | 2013-09-25 | 天津理工大学 | AIS message packet error rate measuring system based on arbitrary waveform generator |
| CN104980947A (en) * | 2015-05-07 | 2015-10-14 | 深圳市国电科技通信有限公司 | System for testing consistency of micropower wireless communication protocols |
| CN106487459A (en) * | 2016-09-29 | 2017-03-08 | 上海斐讯数据通信技术有限公司 | A kind of test system of receiver radio frequency static parameter |
| CN108322270A (en) * | 2018-02-05 | 2018-07-24 | 重庆邮电大学 | A kind of wireless radio frequency receivers sensitivity test method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251573A (en) * | 2008-02-29 | 2008-08-27 | 东南大学 | Automatic testing method for mixer third order inter-modulation distortion of radio-frequency tuner chip |
| CN202004764U (en) * | 2011-02-23 | 2011-10-05 | 苏州博联科技有限公司 | Anti-interference test system for sensor network nodes |
| CN102651669A (en) * | 2011-02-23 | 2012-08-29 | 苏州博联科技有限公司 | Anti-interference test system of sensor network nodes and test method |
-
2012
- 2012-12-21 CN CN2012105598741A patent/CN103052107A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251573A (en) * | 2008-02-29 | 2008-08-27 | 东南大学 | Automatic testing method for mixer third order inter-modulation distortion of radio-frequency tuner chip |
| CN202004764U (en) * | 2011-02-23 | 2011-10-05 | 苏州博联科技有限公司 | Anti-interference test system for sensor network nodes |
| CN102651669A (en) * | 2011-02-23 | 2012-08-29 | 苏州博联科技有限公司 | Anti-interference test system of sensor network nodes and test method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326895A (en) * | 2013-05-30 | 2013-09-25 | 天津理工大学 | AIS message packet error rate measuring system based on arbitrary waveform generator |
| CN103326895B (en) * | 2013-05-30 | 2016-04-06 | 天津理工大学 | A kind of AIS message Packet Error Ratio measuring system based on AWG (Arbitrary Waveform Generator) |
| CN104980947A (en) * | 2015-05-07 | 2015-10-14 | 深圳市国电科技通信有限公司 | System for testing consistency of micropower wireless communication protocols |
| CN106487459A (en) * | 2016-09-29 | 2017-03-08 | 上海斐讯数据通信技术有限公司 | A kind of test system of receiver radio frequency static parameter |
| CN108322270A (en) * | 2018-02-05 | 2018-07-24 | 重庆邮电大学 | A kind of wireless radio frequency receivers sensitivity test method |
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