CN104808096A - Wireless module automatic test device and method based on instrument control - Google Patents
Wireless module automatic test device and method based on instrument control Download PDFInfo
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- CN104808096A CN104808096A CN201410042609.5A CN201410042609A CN104808096A CN 104808096 A CN104808096 A CN 104808096A CN 201410042609 A CN201410042609 A CN 201410042609A CN 104808096 A CN104808096 A CN 104808096A
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Abstract
The invention relates to a wireless module automatic test device based on instrument control. A code-scanning gun, a computer, a wireless connection tester and a radio frequency/ microwave conversion platform are sequentially connected; the wireless connection tester is connected with a wireless test tool; and the computer is connected with the radio frequency/ microwave conversion platform and the wireless test tool. The method comprises the following steps: recording information of a tested wireless module by utilizing the code-scanning gun; controlling the wireless test tool to supply power for the wireless module and collect short-circuit voltage to judge whether the wireless module has short-circuit trouble through the computer; carrying out initial configuration on the wireless connection tester, the radio frequency/ microwave conversion platform and the wireless module, and reading radio frequency parameters of each channel of the wireless module; carrying out re-configuration and receiving reception success rate of each channel of the wireless module; and judging whether the wireless module has fault according to the radio frequency parameters and the reception success rate of each channel. According to the device and method, instrument resources are fully utilized, and thus production efficiency is improved, and human-made errors in the test process are reduced.
Description
Technical field
The present invention relates to automatic testing equipment and the method for wireless communication module, particularly relate to a kind of wireless communication module automatic test device and method of the instrument control model based on unified interface.
Background technology
Flourish along with China's Internet of Things cause, the quantity required of short-range wireless communication module increases greatly.In particular for the module of WIA-PA technology, its usage quantity also will be very huge.
And in the production run of wireless module, if use traditional manual testing, there is following shortcoming: 1) labour intensity of tester is high, and workload is large; 2) in test process, operational ton is large, and operation steps is complicated; 3) artificial test error can be brought in concrete test operation; 4) access threshold of tester is high; 5) company is when carrying out tracing management and controlling to product quality, there is many technology barriers; 6) instrument resource is not fully exploited, and testing efficiency is low.
Summary of the invention
It is high and can carry out the device and method of test automatically to wireless module that the object of the invention is to provide a kind of personal error reduced in test process, testing efficiency.
The technical scheme that the present invention is adopted for achieving the above object is: based on the list-directed wireless module automatic testing equipment of instrument, barcode scanning gun, computing machine, wireless connections tester, RF/Microwave conversion platform are linked in sequence, and wireless connections tester is connected with wireless test frock; Described computing machine is also connected with RF/Microwave conversion platform, wireless test frock.
Described wireless test frock comprises: one-chip computer module, wireless module supply module, wireless module interface module are linked in sequence, and single-chip microcomputer is connected with wireless module interface module by communication module; Described one-chip computer module is connected with computing machine by Local Communication Module; Described wireless module interface module is used for being connected with wireless module;
Described wireless test frock also comprises RF cable interface, is connected by RF cable interface for wireless module with wireless connections tester.
Described wireless module supply module is multiple, is all connected with one-chip computer module.
Described wireless module interface module is multiple, and connects one to one with multiple wireless module supply module; Each wireless module interface module is for connecting a wireless module.
Described wireless module supply module adopts triode, switch chip and overcurrent protection chip; The base stage of described triode is connected with the control end of single-chip microcomputer by resistance, grounded emitter, and collector passes through capacity earth, is also connected with the control end of switch chip; The input end of switch chip is all connected with power supply, and and be connected with resistance between control end, also pass through capacity earth; The output terminal of switch chip is all connected with wireless module interface module by overcurrent protection chip, also by two resistance eutral groundings of connecting, the node between two resistance is connected with the I/O mouth of single-chip microcomputer.
Based on the list-directed wireless module automatic test approach of instrument, comprise the following steps:
1) barcode scanning gun scans the Quick Response Code mark on tested wireless module, and the identification information of wireless module is input to computing machine;
2) computing machine control wireless test frock is powered to wireless module and is gathered short-circuit voltage and judges whether this wireless module has short trouble, if not, performs next step;
3) computing machine carries out initial configuration to wireless connections tester, RF/Microwave conversion platform and wireless module, makes wireless module send data; RF/Microwave conversion platform receives the data of wireless module by wireless connections tester, and the radio frequency parameter recording each channel is sent to computing machine;
4) computing machine configures again to wireless connections tester, RF/Microwave conversion platform and wireless module, makes RF/Microwave conversion platform send data; Wireless module is tested the successful receiving rate of each channel and is sent to computing machine by wireless test frock;
5) computing machine judges the radio frequency parameter of each channel and successful receiving rate whether in range of set value; If the radio frequency parameter of all channels and successful receiving rate are all in range of set value, then this wireless module non-fault, otherwise for there being fault;
6) step 1)-5 is repeated), complete the automatic test of all wireless modules successively.
Described computing machine control wireless test frock is powered to wireless module and is gathered short-circuit voltage and judges whether this wireless module has short trouble to comprise the following steps:
The one-chip computer module of wireless test frock receives the power supply instruction of computing machine, sends high level to wireless module supply module; The short circuit that one-chip computer module gathers wireless module supply module gathers voltage; If this voltage is less than threshold value, then this wireless module has short trouble, and by the power-off of wireless module supply module; Otherwise be without short trouble.
Described initial configuration comprises the following steps:
Allocation of computer wireless connections tester, makes its communication path corresponding with tested wireless module communication path;
Wireless module configuration data is sent to wireless test frock by serial ports;
This configuration data is re-grouped package into the configuration data meeting wireless module communication protocol by the one-chip computer module of wireless test frock, and sends to tested wireless module by communication module, configures it and is operated in emission mode and is operated in each channel successively;
Allocation of computer RF/Microwave conversion platform is receiving mode, and it is corresponding with the working channel of wireless module to configure its communication channel.
Described configuration again comprises the following steps:
Allocation of computer wireless connections tester, makes its communication path corresponding with tested wireless module communication path;
Wireless module configuration data is sent to wireless test frock by serial ports;
This configuration data is re-grouped package into the configuration data meeting wireless module communication protocol by the one-chip computer module of wireless test frock, and sends to tested wireless module by communication module, configures it and is operated in receiving mode and is operated in each channel successively;
Allocation of computer RF/Microwave conversion platform is sending mode, and to configure its communication channel be corresponding with the working channel of wireless module.
Described wireless module is tested the successful receiving rate of each channel and is sent to computing machine by wireless test frock and comprises the following steps:
Computing machine controls RF/Microwave conversion platform and sends N secondary data, and the RF cable through wireless connections tester, wireless test frock is interfaced to wireless module;
After wireless module often receives 1 these data, the value of successful receiving rate adds 1; As reception is not that these data then do not add up and think that it is that interfering data bag is abandoned;
The querying command group of computing machine is bundled into the order meeting wireless module communication protocol and is sent to tested wireless module by wireless test frock; And the successful receiving rate information that wireless module sends is returned to computing machine.
The present invention has following beneficial effect and advantage:
1, tester frees by the present invention from the duplication of labour of complexity; Reduce in test process, artificial test error.
2, the present invention reduces the standard on duty of tester, makes test simplify high efficiency; And company of being convenient to carries out tracing management and control to product quality.
3, the present invention makes instrument resource utilize completely, enhances productivity.
4. the present invention adopts wireless test frock can carry out loop test to wireless module, realizes uninterruptedly testing.
5. the present invention realizes automatic test completely, and test process is without human users, and test result is accurate, and accuracy rate is high.
Accompanying drawing explanation
Fig. 1 is wireless automatic testing equipment structural representation of the present invention;
Fig. 2 is wireless test tool circuit block diagram;
Fig. 3 is wireless module supply module circuit diagram;
Fig. 4 is automatic test approach process flow diagram;
Fig. 5 is WIA-PA modular structure schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
The present invention is intended to overcome the deficiencies in the prior art part and provide a kind of personal error that can reduce in test process, tester's access threshold is low, company of being convenient to carries out tracing management and control to product quality, and instrument resource is utilized completely, and testing efficiency is high.Replacing test frequency range, change content measurement when, system can complete to wireless module test process based on the list-directed automated testing method of instrument.The present invention can realize communication sensitivity, output power, OBW(effective bandwidth to wireless communication module), EVM(vector amplitude error), the automatic test of the technical indicator of power flatness etc.
As shown in Figure 1, the equipment that embodiment of the present invention provides, for the automatic detection of wireless module performance index.Comprise computing machine, test fixture, instrument N4010A, instrument L4491 and barcode scanning gun.Computing machine, for control to test all processes, data analysis and data statistics.Test fixture, for realize computing machine to the control of tested module, to power for tested module and testedly to provide necessary condition.Instrument N4010A, for detecting the RF index of wireless module, and feeds back to computing machine by test data.Instrument L4491, for switch test path, realizes 1 section of N4010A instrument and tests multiple wireless module.Barcode scanning gun, for reading the coded message (producer, model, sequence number etc.) of tested module, so that exclusive archives set up by computing machine, stores data.
The method that the wireless module that embodiment of the present invention provides is tested automatically, comprises the following steps: use the tested wireless module information of barcode scanning gun record; According to testing sequence, control wireless test frock switch test path, and power for tested wireless module; Judge the whether short circuit of this module, if short circuit stops test at once, point out this module defective, and start to test next module; If non-short circuit, arranging module by wireless test frock is emission mode, and configuration module and instrument (L4491) communication channel; Whether reading instrument (N4010A) data judge module is qualified in the emissive power of each channel, if defective, points out this module defective, and starts to test next module; If qualified, arranging module by test fixture is receiving mode, and configuration module and instrument (L4491) communication channel, control instrument (N4010A) with the emissive power of module receiving sensitivity index, launches fixed protocol bag 100 times at each channel; Read tested module and receive protocol package quantity, judge that whether receiving sensitivity is qualified, if qualified, continue next module testing; If defective, point out this module defective, and test next module.
The present invention can detect and comprise the wireless module that physical layer protocol is 802.15.4 or 802.11 agreements, wireless communication frequency band is the rf chip of 2.4GHz, wireless module tested in the present embodiment is for WIA-PA module, as shown in Figure 2, test fixture design is as follows:
Fixture Design 4 wireless module interface modules are used for WIA-PA module testing interface, can test 4 modules successively.Frock mainly comprises following components: one-chip computer module, circuit supply module, communication module, Local Communication Module, wireless module supply module, with wireless module interface module.
One-chip computer module is based on the design of LPC1764 single-chip microcomputer, and use the crystal oscillator of 12M, matching capacitance is 18p.Emulation interface adopts the JTGA mode of the 20pin interface of 2*10.Storage mode uses the EEPROM chip of AT24C256.Affect Auto-Test System owing to worrying test fixture program autoboot, therefore the design of frock does not add watchdog reset circuit.
Circuit supply module is used for other module for power supply in wireless test frock, use LDO chip LM1117, transfer the input voltage of DC/+5V ~+10V to DC/+3.3V, the input of chip, output terminal use 104 capacitor filterings of 0603 encapsulation, and input end uses diode 1N4007 to prevent electric current reverse.Power input interface uses DC005-2.1 joint, uses waved switch to control the power supply of frock simultaneously.
As shown in Figure 3, wireless module supply module is 4, is identical circuit, is respectively 4 WIA-PA modules and powers.Each circuit all with chip I RF7416 for core, use triode 9013 to drive as control, use resettable fuse as overcurrent protection chip, 2 resistance R31, R36 form short circuit alarm collection circuit and connect with single-chip processor i/o.When Single-chip Controlling pin P1 is high level, triode ON, the now output of IRF7416 chip is+3.3V; When pin is low level, triode not conducting, now the output 0V of IRF7416 chip.When tested module power supply short circuit, cause passage current excessive.Now, resettable fuse F2 meeting disconnecting circuit, module for power supply voltage is 0V, and protection subsequent conditioning circuit does not damage.When circuit normal power supply, short circuit alarm collection end CDET1 collects the voltage being about+3.3V, and now single-chip microcomputer is judged as that circuit is normal.When short circuit, because resettable fuse disconnects, short circuit alarm collection terminal voltage is 0V, and now single-chip microcomputer is judged as short circuit, produces short circuit alarm.
Local Communication Module is used for one-chip computer module and compunication, with chip SP3485E for core, with DB9 interface for external interface designs.A, B line of 485 communications adopts 2 resettable fuse FSMD010-1210 to protect.A line uses 10K resistance to make pull-up, and B line uses 10K resistance to do drop-down.220 Ω resistance are used to do build-out resistor.
Communication module is used for and WIA-PA module communication, and design based on chip CD4051, by programmed control, the 1 road serial ports realizing single-chip microcomputer communicates with the serial ports of 4 disparate modules respectively.The enable pin INH(6 of chip CD4051) be connected on the common I/O pin of single-chip microcomputer respectively, use 10K resistance as pull-up simultaneously.Pin A(11 selected by the path of CD4051), B(10), C(9) be connected on respectively on the common I/O pin of single-chip microcomputer.The OUT/IN(3 of CD4051) pin is connected on the serial ports 3 of single-chip microcomputer.Use the IN/OUT2(15 of CD4051 chip), IN/OUT4(1), IN/OUT6(2), IN/OUT7(4) pin is connected with corresponding 4 tested WIA-PA module serial ports respectively by 4 wireless module interface modules.
Wireless module interface module, for connecting external wireless module, for WIA-PA wireless module, connects the supply line of its serial ports and power module.
As shown in Figure 4, method of testing is as follows:
Test module whether short circuit: computing machine and wireless test tooling communication, control it and power for tested module and switch telecommunication circuit, computing machine is forwarded by the single-chip microcomputer of wireless test frock and with tested WIA-PA module communication.Wireless test frock detects short circuit and gathers port, judge module whether short circuit.Computer inquery wireless test frock Detection Information, judges wireless module whether short circuit carry out follow-up test.
Test output power, OBW(effective bandwidth), EVM(vector amplitude error): computing machine by wireless test frock, controls tested WIA-PA module and enters sending mode, and to adjust communication channel be No. 11 channels.Connect instrument N4010A by GPIB line, sending controling instruction, makes it be operated in No. 11 channels equally, realizes the reception transmitted to WIA-PA module.And to DUT(and tested wireless module) launch the packet meeting IEEE802.15.4 agreement, and carry out demodulation by 89600VSA, the power that 89600VSA is analyzed, OBW(occupied bandwidth), EVM(vector amplitude error) index carries out, value is compared with set standard value, draw whether alarm, be finally presented on interface.After No. 11 channel tests terminate, the working channel of amendment WIA-PA module and instrument N4010A is 12 ~ No. 26, equally to data analysis.The data of whole 16 channels carry out united analysis the most at last, show the final testing result of this index.
Measured power flatness: computing machine carries out statistical computation according to the size of 16 channel output power, is presented at the difference of power maxima and minima in 16 channels in interface.This difference is the power flatness of tested module, the index of numerical value and setting is contrasted, and whether the power flatness of judge module is qualified.
Communication sensitivity: computing machine by wireless test frock, controls tested WIA-PA module and enters receiving mode, and to adjust communication channel be No. 11 channels.Connect instrument N4010A by GPIB line, sending controling instruction, makes it be operated in No. 11 channels equally, and controls it with fixing agreement, and the output power of setting sends data to tested module.Computing machine and wireless test tooling communication, send the successful receiving rate of data by wireless test frock inquiry tested module to instrument N4010A, namely communicate success ratio, will value and set standard comparing, draws whether alarm, be finally presented on interface.After No. 11 channel tests terminate, the working channel of amendment WIA-PA module and instrument N4010A is 12 ~ No. 26, equally to data analysis.The data of whole 16 channels carry out united analysis the most at last, show the final testing result of this index.
TS(standard work force) time statistics: start timing when WIA-PA module starts to test, when stopping timing after reception test.After module testing completes, the test duration is presented on the main interface of automatic testing software.Through the analysis to the TS time, can conveniently adjust the distribution of producers.
Data statistics function: by the Quick Response Code mark of barcode scanning gun scanning WIA-PA module, set up the test archives of this module in a database according to mark.Whole test data is recorded in the archives changing module and preserves.Recall tested module archives by computing machine, the functions such as data are checked, analysis can be realized.And corresponding test report can be produced.
Along with the development of automatic control technology and the communication technology, the test function of the index of correlation to WIA-PA module can be completed by instrument control technology and software development technique.More and more numerous and diverse test job replaced by computing machine.
Concrete test process is as follows:
Barcode scanning gun recorded information: use the barcode scanning gun Quick Response Code scanned in tested WIA-PA module to identify (module produces coding).This Data Enter to computing machine, records the information in product database by computing machine, makes file of product by barcode scanning gun.
For tested module is powered: after computer scanning module Quick Response Code, computing machine can be pointed out ready.User inputs initiation command, and system starts automatic operation.Computing machine sends power supply instruction by serial ports of computers to wireless test frock.Wireless test frock resolves this instruction, opens the power switch of corresponding test path according to command request.Start the module of testing first via interface as resolved to, it is high level that wireless test frock then controls corresponding wireless module supply module control end, is the module for power supply of first via interface by wireless module supply module circuit.As resolved to the module of other test interfaces, then by its power supply of corresponding I/O Interface Controller.
Modular circuit judges: after WIA-PA module for power supply modular circuit controls power supply by wireless test frock, if module short circuit, the resettable fuse in circuit can disconnect power supply.The short circuit acquisition interface that now single-chip microcomputer of wireless test frock is corresponding is low level, and single-chip microcomputer is judged as short circuit alarm.If module not short circuit, then single-chip microcomputer acquisition interface is high level, and single-chip microcomputer is judged as not short circuit.Computing machine is, after tested module is powered, again can send query statement at control test fixture, is used for the whether short circuit of inquiry tested module.Wireless test frock is resolved after receiving these data, and alarm status is returned to computing machine, has Computer display whether short circuit alarm.As computing machine confirms the non-short circuit of module, then proceed test.As the short circuit of computing machine judge module, then stop the test of current block immediately, and send data, control the power supply that test fixture disconnects current block, and start the test of next module.
Configuration module and instrument: output power, OBW(effective bandwidth for test WIA-PA module), EVM(vector amplitude error), power flatness index, following configuration need be done to module, N4010 instrument, L4491 instrument:
(1) computing machine is by gpib interface configuration L4491 instrument, and make its communication path identical with tested wireless module path (corresponding with the wave point of tested wireless module), namely when test first wireless module, path is 1; During second wireless module, path is 2; The like.
(2) computing machine is by serial ports and wireless test tooling communication, sends WIA-PA module configuration data, makes it be operated in emission mode:
The data that test fixture analytical Calculation machine sends, judge that it is the data of configuration WIA-PA emission mode, and are re-grouped package into the configuration data meeting WIA-PA agreement and send to tested WIA-PA module.Configure it and be operated in emission mode.
(3) computing machine is by serial ports and wireless test tooling communication, sends WIA-PA module configuration data, makes it be operated in o.11 channel:
The data that wireless test frock analytical Calculation machine sends, judge that it is the data of configuration WIA-PA channel, and are re-grouped package into the configuration data meeting WIA-PA agreement and send to tested WIA-PA module.Configuring its working channel is No. 11 channels.
(4) computing machine is by gpib interface configuration N4010 instrument, first reading instrument configuration template; And to configure instrument be receiving mode, configure its communication channel is No. 11 channels simultaneously.Now N4010 instrument can receive the radio-frequency information being passed the WIA-PA module of coming by L4491.
(5) computing machine reads emissive power, the OBW(effective bandwidth of N4010 instrument by gpib interface), EVM(vector amplitude error) value.And the data of reading are presented on computer interface.
(6) allocation of computer WIA-PA module and N4010 instrumentation are at 12-26 channel, repeat step (3) to step (5), by the emissive power of 16 channels, OBW(occupied bandwidth), EVM(vector amplitude error) numerical value all gathers and shown.
Judge that whether the radio frequency parameters such as transmitted power are qualified:
(1) computing machine is according to the RF index numerical value gathered, and contrasts with the WIA-PA equipment index standard value configured in computing machine, judges that the RF index of each channel is whether in claimed range.
(2) maxima and minima that the transmission power level of 16 channels read is got wherein is done difference by computing machine.Its value is the power flatness of tested module, the WIA-PA plant capacity flatness standard value configured is contrasted in this value and computing machine.
(3) if result all meets index request after contrast, continue the next item down test, if any the project do not met the demands, then stop test, point out current block defective and start to test next module.
Configuration before receiving sensitivity test:
(1) computing machine is by serial ports and wireless test tooling communication, sends WIA-PA module configuration data, makes it be operated in receiving mode:
The data that wireless test frock analytical Calculation machine sends, judge that it is the data of configuration WIA-PA receiving mode, and are re-grouped package into the configuration data meeting WIA-PA agreement and send to tested WIA-PA module.Configure it and be operated in receiving mode.
(2) computing machine is communicated with test fixture by serial ports, sends WIA-PA module configuration data, makes it be operated in o.11 channel:
The data that test fixture analytical Calculation machine sends, judge that it is the data of configuration WIA-PA channel, and are re-grouped package into the configuration data meeting WIA-PA agreement and send to tested WIA-PA module.Configuring its working channel is No. 11 channels.
(3) computing machine is by gpib interface configuration N4010 instrument, and configuration instrument is sending mode, and configure its communication channel is No. 11 channels simultaneously.
(4) computing machine sends by gpib interface control N4010 instrument the protocol data 100 times that its inside carries.
(5) these data are sent to WIA-PA module through the RF cable interface of wireless test frock.WIA-PA module can be added up these data, after it often receives 1 this information, and the statistics cumulative 1 of its internal receipt success ratio.As reception is not that these data then do not add up and think that it is that interfering data bag is abandoned.
(6) computing machine is communicated with test fixture by serial ports, sends the order of inquiry WIA-PA module successful receiving rate.
(7) data that send of test fixture analytical Calculation machine, judge that it is the data of WIA-PA, and re-group package and be sent to tested WIA-PA module.
(8) successful receiving rate can be returned to test fixture after tested WIA-PA module receives these data.
(9) test fixture to receive after the data of WIA-PA module by the Data Analysis of wherein successful receiving rate out, and these data are sent to computing machine by the protocol package reformulating computing machine relevant.
(10), after computing machine receives these data, successful receiving rate is added on computer interface.
(11) allocation of computer N4010 instrument and WIA-PA module frock channel are No. 12-26.And repeat step (2) to step (10).
Successful receiving rate judges:
(1) successful receiving rate of 16 channels that will gather of computing machine, contrasts with the WIA-PA module successful receiving rate standard value configured in computing machine, judges that the successful receiving rate of each channel is whether in claimed range.
(2) if not within the scope of this this module testing defective, and carry out next module testing; As in scope, then module testing is qualified, and tests next module.
The WIA-PA wireless communication module adopted in the present embodiment as shown in Figure 5, comprises WIA-PA chip 1, storage unit 2, transceiver unit 3, power amplification unit 4, filter unit 5, antenna 6; WIA-PA chip 1 is connected with storage unit 2 by spi bus, WIA-PA chip 1 is connected with transceiver unit 3 by spi bus and IO control line, transceiver unit 3 is connected with power amplification unit 4 by radio frequency interface, power amplification unit 4 is connected with filter unit 5 by radio frequency interface, and filter unit 5 is connected with antenna 6 by radio frequency interface; External TDD power amplification unit 7(and TDD radio-frequency power amplifier) time, WIA-PA chip 1 is connected with the RS232 interface of TDD power amplification unit 7 by RS232 bus, transceiver unit 3 is connected with the switch control interface of TDD power amplification unit 7 by IO control line, and filter cell 5 is connected by the radio frequency interface of radio frequency interface with TDD power amplification unit 7.
WIA-PA chip 1, transceiver unit 3, power amplification unit 4, filter unit 5 are the core component of this module.WIA-PA chip is the CPU of integrated WIA-PA industry wireless network field device protocol stack software (being called for short WIA-PA FD) and WIA-PA industry wireless network routing device protocol stack sofeware (being called for short WIA-PA RD), the model that have employed silicon labs company is the chip of EFM32LG230F256, and it achieves application layer, network layer, data link layer in the protocol stack of WIA-PA.This chip is with three road serial ports, two-way SPI interface, four tunnel I/O interface.
Transceiver unit employs the CC2520 chip of TI company and outside Ba Lun change-over circuit, and CC2520 chip is the physical chip based on IEEE802.15.4 agreement, and the differential signal that CC2520 radio frequency exports is converted to single-ended 50 ohm signal by Ba Lun change-over circuit; The index of the high adjacent frequency rejection ratio of CC2520 be realize this module many coexistence of communication systems especially with the basis of the function that coexists of 2.4GHzWIFI communication system.Communications band is divided into 11-26 totally 16 channels by this chip.
Power amplification unit adopts the RFX2401C chip of RFaxis company to realize the amplification of radio frequency transmit and receive signal, radio frequency interface is 50 ohm single-ended signaling interfaces, inside is integrated with two-way radio-frequency (RF) switch, power amplifier PA, low noise amplifier LNA, well realize the power amplification of downlink signal, the amplification of uplink receiving signal, realizes the high transmit power of this module and the function of high receiving sensitivity.
Filter cell adopts the bandpass filter of 2.4GHz, realizes the filtering to out-of-band-signal, is the basis realizing the many coexistence of communication systems of this module except using 2.4GHz communication system, can meet the basis of complex electromagnetic environment application.
Application layer data by RS232 bus transfer to after WIA-PA chip 1 carries out the process of data, transceiver unit 3 is transferred to, by carrying out wireless transmit in change-over circuit ingoing power amplifying unit 4, filter unit 5 transmitting path after carrying out MAC process, modulation, radiofrequency signal process via transceiver unit 3 by the data channel of the spi bus between transceiver unit 3.
The wireless signal that space propagation comes by after the receiving cable of filter unit 5, power amplification unit 4 and change-over circuit after carrying out radiofrequency signal process, demodulation, MAC process by transceiver unit 3, be reduced into data stream, these data are transferred to WIA-PA chip 1 via the spi bus data channel of transceiver unit 3 and WIA-PA chip 1, after carrying out the data processing of being correlated with, give user alternately by RS232 bus.
For special occasions significant power demand, WIA-PA chip 1 coordinates transceiver unit 3 to carry out the switching of channel by the corresponding control data of RS232 bus transfer, and the IO control line control TDD power amplification unit 6 of transceiver unit 3 carries out the switching of up-downgoing.The process of data transmission is the same with above two steps.
Claims (10)
1. based on the list-directed wireless module automatic testing equipment of instrument, it is characterized in that: barcode scanning gun, computing machine, wireless connections tester, RF/Microwave conversion platform are linked in sequence, and wireless connections tester is connected with wireless test frock; Described computing machine is also connected with RF/Microwave conversion platform, wireless test frock.
2. according to claim 1 based on the list-directed wireless module automatic testing equipment of instrument, it is characterized in that described wireless test frock comprises: one-chip computer module, wireless module supply module, wireless module interface module are linked in sequence, and single-chip microcomputer is connected with wireless module interface module by communication module; Described one-chip computer module is connected with computing machine by Local Communication Module; Described wireless module interface module is used for being connected with wireless module; Described wireless test frock also comprises RF cable interface, is connected by RF cable interface for wireless module with wireless connections tester.
3. according to claim 1 based on the list-directed wireless module automatic testing equipment of instrument, it is characterized in that: described wireless module supply module is multiple, is all connected with one-chip computer module.
4. according to claim 1 based on the list-directed wireless module automatic testing equipment of instrument, it is characterized in that: described wireless module interface module is multiple, and connect one to one with multiple wireless module supply module; Each wireless module interface module is for connecting a wireless module.
5. according to claim 1 based on the list-directed wireless module automatic testing equipment of instrument, it is characterized in that: described wireless module supply module adopts triode, switch chip and overcurrent protection chip; The base stage of described triode is connected with the control end of single-chip microcomputer by resistance, grounded emitter, and collector passes through capacity earth, is also connected with the control end of switch chip; The input end of switch chip is all connected with power supply, and and be connected with resistance between control end, also pass through capacity earth; The output terminal of switch chip is all connected with wireless module interface module by overcurrent protection chip, also by two resistance eutral groundings of connecting, the node between two resistance is connected with the I/O mouth of single-chip microcomputer.
6., based on the list-directed wireless module automatic test approach of instrument, it is characterized in that comprising the following steps:
1) barcode scanning gun scans the Quick Response Code mark on tested wireless module, and the identification information of wireless module is input to computing machine;
2) computing machine control wireless test frock is powered to wireless module and is gathered short-circuit voltage and judges whether this wireless module has short trouble, if not, performs next step;
3) computing machine carries out initial configuration to wireless connections tester, RF/Microwave conversion platform and wireless module, makes wireless module send data; RF/Microwave conversion platform receives the data of wireless module by wireless connections tester, and the radio frequency parameter recording each channel is sent to computing machine;
4) computing machine configures again to wireless connections tester, RF/Microwave conversion platform and wireless module, makes RF/Microwave conversion platform send data; Wireless module is tested the successful receiving rate of each channel and is sent to computing machine by wireless test frock;
5) computing machine judges the radio frequency parameter of each channel and successful receiving rate whether in range of set value; If the radio frequency parameter of all channels and successful receiving rate are all in range of set value, then this wireless module non-fault, otherwise for there being fault;
6) step 1)-5 is repeated), complete the automatic test of all wireless modules successively.
7. according to claim 6 based on the list-directed wireless module automatic test approach of instrument, it is characterized in that: described computing machine control wireless test frock is powered to wireless module and gathered short-circuit voltage and judges whether this wireless module has short trouble to comprise the following steps:
The one-chip computer module of wireless test frock receives the power supply instruction of computing machine, sends high level to wireless module supply module; The short circuit that one-chip computer module gathers wireless module supply module gathers voltage; If this voltage is less than threshold value, then this wireless module has short trouble, and by the power-off of wireless module supply module; Otherwise be without short trouble.
8. according to claim 6 based on the list-directed wireless module automatic test approach of instrument, it is characterized in that described initial configuration comprises the following steps:
Allocation of computer wireless connections tester, makes its communication path corresponding with tested wireless module communication path;
Wireless module configuration data is sent to wireless test frock by serial ports;
This configuration data is re-grouped package into the configuration data meeting wireless module communication protocol by the one-chip computer module of wireless test frock, and sends to tested wireless module by communication module, configures it and is operated in emission mode and is operated in each channel successively;
Allocation of computer RF/Microwave conversion platform is receiving mode, and it is corresponding with the working channel of wireless module to configure its communication channel.
9. according to claim 6 based on the list-directed wireless module automatic test approach of instrument, described in it is characterized in that, configuration comprises the following steps again:
Allocation of computer wireless connections tester, makes its communication path corresponding with tested wireless module communication path;
Wireless module configuration data is sent to wireless test frock by serial ports;
This configuration data is re-grouped package into the configuration data meeting wireless module communication protocol by the one-chip computer module of wireless test frock, and sends to tested wireless module by communication module, configures it and is operated in receiving mode and is operated in each channel successively;
Allocation of computer RF/Microwave conversion platform is sending mode, and to configure its communication channel be corresponding with the working channel of wireless module.
10. according to claim 6 based on the list-directed wireless module automatic test approach of instrument, it is characterized in that: described wireless module is tested the successful receiving rate of each channel and is sent to computing machine by wireless test frock and comprises the following steps:
Computing machine controls RF/Microwave conversion platform and sends N secondary data, and the RF cable through wireless connections tester, wireless test frock is interfaced to wireless module;
After wireless module often receives 1 these data, the value of successful receiving rate adds 1; As reception is not that these data then do not add up and think that it is that interfering data bag is abandoned;
The querying command group of computing machine is bundled into the order meeting wireless module communication protocol and is sent to tested wireless module by wireless test frock; And the successful receiving rate information that wireless module sends is returned to computing machine.
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