CN206195789U - Testing arrangement of ETC equipment - Google Patents
Testing arrangement of ETC equipment Download PDFInfo
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- CN206195789U CN206195789U CN201621173787.2U CN201621173787U CN206195789U CN 206195789 U CN206195789 U CN 206195789U CN 201621173787 U CN201621173787 U CN 201621173787U CN 206195789 U CN206195789 U CN 206195789U
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Abstract
The utility model relates to a testing arrangement of ETC equipment. This testing arrangement includes: control module, sending module, signal processing module, man -machine interaction module, power detection module, power module. Wherein: sending module's input and control module are connected, signal processing module's output and control module are connected, man -machine interaction module and control module are connected, the input and the sending module of power detection module are connected, and the output is connected with control module. The utility model discloses can substitute the signal source, carry out the test in the aspect of the receipt of ETC equipment, the cost that has not only reduced the equipment test drops into and dimension nursing worker work, has still improved the convenience and the efficiency of software testing of test to the popularization that has ensured ETC equipment is applied with in batches.
Description
Technical field
The utility model is related to technical field of intelligent traffic, more particularly to a kind of test of electric non-stop toll equipment to fill
Put.
Background technology
With developing rapidly for intelligent transportation system, electric non-stop toll (Electronic Toll Collection,
ETC) system is widely used in the charge gateway such as high speed, tunnel, parking lot, replaces manual toll collection, improves charge efficiency, has
Congestion problems are alleviated on effect ground, while reducing noxious gas emission.ETC system utilizes special short-range wireless communication technologies
(Dedicated Short-Range Communication, DSRC), completes the roadside unit on ETC tracks
Communication between (Road-Side Unit, RSU) and the vahicles label (On Board Unit, OBU) being arranged on vehicle,
In the case of need not stopping, charge treatment overall process is automatically performed, really realizes unattended, reduction management cost, improved
Vehicle pass-through efficiency.
The national standard of electronic charging DSRC, i.e. GB/T 20851.1-2007, it is stipulated that RSU in ETC equipment
With the technical requirement of OBU.And the technical requirements of Part I physical layer, then transmit power to ETC equipment, modulation system
Number, occupied bandwidth, receiving sensitivity, reception bandwidth etc. have all done clear and definite regulation.Index wherein related to transmission, mainly needs
To be tested using frequency spectrograph, and receiving related index needs signal source to be tested.
ETC equipment was required for the test by strict physical layer parameter before use of dispatching from the factory, wide with ETC system
General application, the usage amount of ETC equipment is increasing, to the detection of ETC equipment and the efficiency requirements tested also more and more higher.Frequency spectrum
Instrument, signal source belong to high-end radio frequency testing instrument, involve great expense.Batch is met by increasing the quantity of radio frequency testing instrument
The testing requirement of ETC equipment, high cost, difficulty is big, and maintenance work is complicated, is unfavorable for popularization and the batch application of ETC equipment.
Utility model content
The purpose of this utility model is to provide a kind of test device of ETC equipment, mainly tests ETC physical layer of device
Reception parameter in parameter.The test device reduces the cost input of equipment test, improves the effect of ETC products and equipment test
Rate.
To realize above-mentioned utility model purpose, the utility model provides a kind of test device of ETC equipment, including：Control
Molding block, sending module, signal processing module, wherein：
The input of the sending module is connected with control module；
The output end of the signal processing module is connected with control module.
Alternatively, the test device of the ETC equipment, also includes：Human-computer interaction module, power detection module, power supply mould
Block.
Alternatively, the human-computer interaction module is connected with control module.
Alternatively, the input of the power detection module is connected with sending module, and output end is connected with control module.
Alternatively, the sending module includes signal generating circuit, signal intensity regulation circuit, combiner.
Alternatively, the signal generating circuit, signal intensity regulation circuit are 2 groups.
Alternatively, the signal processing module includes decoding circuit.
Alternatively, the power detection module includes detecting circuit, analog/digital conversion circuit.
The beneficial effects of the utility model are that the test device of the ETC equipment that the utility model is provided can substitute letter
Number source, carries out the test in terms of the reception of ETC equipment.By a test device, completion includes receiving sensitivity, receives dynamic
Scope, reception bandwidth, co-channel interferences suppression than the performances such as, adjacent-channel interference rejection ratio test, it is simple to operate, research and development,
Can be applied in production or practical application.Equipment investment cost is reduced, the convenience of test is improve, in actual applications may be used
Manpower expenditure is saved, quick performance test is carried out, testing efficiency is substantially increased.
Brief description of the drawings
Feature and advantage of the present utility model can be more clearly understood from by reference to accompanying drawing, accompanying drawing be it is schematical without
It is interpreted as carrying out any limitation to the utility model, in the accompanying drawings：
Fig. 1 is a kind of structured flowchart of the test device of ETC equipment that the utility model embodiment is provided；
Fig. 2 be the utility model embodiment provide a kind of ETC equipment test device in sending module structured flowchart.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is used to illustrate the utility model, but is not limited to scope of the present utility model.
Before being explained to the utility model embodiment, firstly, it is necessary to explanation, recipient is being carried out to ETC equipment
, it is necessary to test the receiving sensitivity of the equipment, receive dynamic range, reception bandwidth, cochannel when the physical layer parameter in face is tested
Interference suppression ratio, adjacent-channel interference rejection ratio etc..Wherein receiving sensitivity is the minimum power input that ETC equipment can be received,
The receiving ability of sign equipment；Reception dynamic range is the difference of the maximal input that ETC equipment can be received and minimum power
Value, characterizes the range of receiving of equipment；Reception bandwidth is the difference of the highest frequency that ETC equipment can be received and low-limit frequency, table
Levy the frequency adaptability of equipment；Co-channel interferences suppression than be ETC equipment under the premise of having co-channel interference signal reception spirit
Sensitivity, characterizes the cochannel antijamming capability of equipment；Adjacent-channel interference rejection ratio is having adjacent channel interferer for ETC equipment
Under the premise of receiving sensitivity, characterize equipment side channel antijamming capability.
In practical application, generally provide test signal by signal source instrument and give ETC equipment, it is right as up input signal
Receiving sensitivity of equipment etc. is tested.A kind of test device of ETC equipment is provided in the utility model embodiment, can be with
Substitution signal source instrument, there is provided test signal is tested to Devices to test so as to carry out receiving sensitivity, receive dynamic range etc..
The utility model embodiment provides a kind of test device of ETC equipment, as shown in figure 1, including：Control module
100th, sending module 200, signal processing module 300, human-computer interaction module 400, power detection module 500, power module 600,
Wherein：
The input of sending module 200 is connected with control module 100；
The output end of signal processing module 300 is connected with control module 100.
Human-computer interaction module 400 is connected with control module 100；
The input of power detection module 500 is connected with sending module 200, and output end is connected with control module 100, including
Detecting circuit, analog/digital conversion circuit.
In sending module 200, including the first signal generating circuit 201, the first signal intensity regulation circuit 202, second are believed
Number produce circuit 204, secondary signal dimmer circuit 205, combiner 203.
Signal processing module 300 includes decoding circuit, and the output baseband signal of device under test 20 carries out decoding process.Work(
The detection of the power output of sending module 200 is fed back to control module by rate detection module 500, carries out self calibration work, it is ensured that hair
Send the accuracy of power.
, when the receiving sensitivity of RSU in carrying out ETC equipment is tested, operating personnel are in man-machine friendship for the utility model embodiment
The instruction of input test receiving sensitivity, control module 100 in mutual module 400, after receiving test instruction, generate initial data
Sequence PN9 random sequences, after the sequence is produced, are preserved with a register.The initial data PN9 sequences of generation, are compiled by FM0
Code, into sending module 200, be modulated at coded data on 5.79GHz by sending module 200, is adjusted by signal intensity, output
To RSU equipment 20 to be measured.RSU equipment 20 to be measured receives the modulated signal of 5.79GHz, is filtered, amplifies, demodulates, and exports FM0
The demodulation that the demodulating data of coding is encoded to the signal processing module 300 in test device 10, signal processing module 300 to FM0
Data carry out decoding process, pass to control module 100.Demodulating and decoding data and deposit before that control module 100 will be received
PN9 random sequences in a register synchronize contrast, calculate the bit error rate under the input signal strength.
In practical application, by controlling sending module 200, regulation inputs to the letter of RSU equipment 20 to be measured to control module 100
Number intensity, as shown in Figure 2.Control module 100, the first signal generating circuit 201 in control sending module 200 produces 5.79G
Signal, and will encode modulates baseband signals in the first signal generating circuit 201 so that its output 5.79GHz modulation letter
Number, the first signal intensity regulation circuit 202, the power level of Regulate signal is exported to Devices to test by combiner 203
RSU20.So test device 10 can by the signal power of RSU equipment 20 to be measured is inputed to weak domination by force, wherein, meet mistake
The most weak signal strength of code check index request, the as receiving sensitivity of the Devices to test 20, are eventually displayed in man-machine interaction mould
On block 400.During test receiving sensitivity, secondary signal produces circuit 204 and secondary signal dimmer circuit 205 to be in
Resting state；The most weak signal strength value of display has passed through demarcation, to be directly entered the input power value of the port of Devices to test 20.
Operating personnel only need to test device 10 normally be connected ETC equipment 20 to be measured, by human-computer interaction module 400
On a key input, it is possible to obtain the index parameter of the receiving sensitivity of Devices to test 20, simple to operate, it is easy to safeguard.
Further, in actual applications, test receives dynamic range, and the test mode with receiving sensitivity is consistent, only
It is the bound for needing to test receiving sensitivity, it is the difference of bound to be eventually displayed on human-computer interaction module 400.
Further, in actual applications, reception bandwidth is tested, the test mode with receiving sensitivity is similar, simply needs
The outgoing carrier frequency of the first signal generating circuit 201 is adjusted in the left and right using channel, in the first signal intensity
When the power output for adjusting circuit 202 is (P1+6) dBm, error rate index requirement is met.It is eventually displayed in human-computer interaction module
The difference to meet desired frequency limits on 400.
Another embodiment that the utility model is given be to RSU equipment receive co-channel interferences suppression than test.Should
In, control module 100 generates two groups of original data sequence PN9 random sequences, and one group is encoded by FM0, into transmission mould
The first signal generating circuit 201 in block 200；Another group then encodes without FM0, is directly entered in sending module 200 the
Binary signal produces circuit 204.Two groups of base band datas produce circuit 204 in the first signal generating circuit 201 and secondary signal respectively
In be modulated on 5.79GHz signals, respectively through the first signal intensity adjust circuit 202 and secondary signal dimmer circuit
205, into combiner 203, RSU equipment 20 to be measured is entered by the output of combiner.
In practical application, operating personnel in human-computer interaction module 400 input test co-channel interferences suppression than instruction,
Control module 100, after receiving test instruction, is first according to the method for testing of receiving sensitivity, determines that the first signal intensity is adjusted
The power output intensity P1dBm on economize on electricity road 202, now secondary signal generation circuit 204 and secondary signal dimmer circuit 205
In off position.Next, the power output of the first signal intensity regulation circuit 202 is adjusted to (P1+6) dBm, in the case where connecing
In the test process for coming, keep immobilizing.Secondary signal is opened simultaneously produces circuit 204 and secondary signal dimmer circuit
205, and by uncoded PN9 sequence modulations on the 5.79G carrier waves that secondary signal produces circuit 204 to produce, by the second letter
Number dimmer circuit 205, the output with the first signal intensity adjusts circuit 202, by combiner 203, sets into RSU to be measured
Standby 20.The output entering signal processing module 300 of RSU equipment 20 to be measured, the processing modes of the reception data of control module 100 pairs and
Receiving sensitivity test is the same.By secondary signal dimmer circuit 205, by weak to emphasizing whole secondary signal intensity adjustment electricity
The output on road 205, until error rate data does not meet test request.When finally meeting error rate index requirement, secondary signal is strong
The power output of degree regulation circuit 205 is P2dBm.Then co-channel interferences suppression ratio is (P1-P2) dB.
Operating personnel only need to test device 10 normally be connected ETC equipment 20 to be measured, by human-computer interaction module 400
On a key input, it is possible to obtain the co-channel interferences suppression of Devices to test 20 than index parameter, it is simple to operate, safeguard and hold
Easily.
Further, in actual applications, adjacent-channel interference rejection ratio is tested, with co-channel interferences suppression than mode one
Cause, it is the signal of side channel that simply secondary signal produces the carrier wave that circuit 204 is produced.
Explanation is needed, possesses decoding function in itself for Devices to test 20, it is also possible to carry out by the test device
Whether the test of receptivity, 300 pairs of data for decoding of signal processing module can do compatible processing.Those skilled in the art can
Rationally set with according to specifically used scene, the utility model is not construed as limiting.
Further, the first signal generating circuit 201, secondary signal produces circuit 204, can be by phaselocked loop, VCO
Device, modulator etc. are constituted, and those skilled in the art can rationally be set according to specifically used scene, and the utility model is not made
Limit.
Further, the first Signal Regulation intensity 202, secondary signal intensity adjustment 205 can be by attenuator, amplifiers
One or more compositions, those skilled in the art can rationally be set according to specifically used scene, and the utility model is not
It is construed as limiting.
Further, ETC equipment 20 to be measured can be OBU equipment, the other equipment such as hand-held distribution device, desk-top distribution device,
It can also be other channels to set channel, and modulation system is also not particularly limited, and those skilled in the art can be according to specifically making
Rationally set with scene.
In the utility model, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that referring to
Show or imply relative importance.Term " multiple " refers to two or more, unless otherwise clearly restriction.
Although being described in conjunction with the accompanying implementation method of the present utility model, those skilled in the art can not depart from
Various modifications and variations are made in the case of spirit and scope of the present utility model, such modification and modification are each fallen within by appended
Within claim limited range.
Claims (6)
1. a kind of test device of ETC equipment, it is characterised in that including：Control module, sending module, signal processing module, its
In：
The input of the sending module is connected with control module；
The output end of the signal processing module is connected with control module.
2. the test device of ETC equipment according to claim 1, it is characterised in that also include：Human-computer interaction module, work(
Rate detection module, power module, wherein：
The human-computer interaction module is connected with control module；
The input of the power detection module is connected with sending module, and output end is connected with control module.
3. the test device of ETC equipment according to claim 1, it is characterised in that the sending module includes that signal is produced
Raw circuit, signal intensity regulation circuit, combiner.
4. the test device of ETC equipment according to claim 3, it is characterised in that the signal generating circuit, signal are strong
Degree regulation circuit is 2 groups.
5. the test device of ETC equipment according to claim 1, it is characterised in that the signal processing module includes solution
Code circuit.
6. the test device of ETC equipment according to claim 2, it is characterised in that the power detection module includes inspection
Wave circuit, analog/digital conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621173787.2U CN206195789U (en) | 2016-10-26 | 2016-10-26 | Testing arrangement of ETC equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621173787.2U CN206195789U (en) | 2016-10-26 | 2016-10-26 | Testing arrangement of ETC equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206195789U true CN206195789U (en) | 2017-05-24 |
Family
ID=58732321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621173787.2U Active CN206195789U (en) | 2016-10-26 | 2016-10-26 | Testing arrangement of ETC equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206195789U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861771A (en) * | 2019-03-22 | 2019-06-07 | 上海控创信息技术股份有限公司 | Rail traffic LTE wireless communication system adjacent-channel interference power device and test method |
| CN111553995A (en) * | 2020-04-30 | 2020-08-18 | 重庆长安汽车股份有限公司 | Method, apparatus, system computer readable storage medium for ETC detection of vehicles off-line from production line |
| CN114157373A (en) * | 2021-12-06 | 2022-03-08 | 上海中铁通信信号测试有限公司 | Rail transit wireless communication interference test method and device |
-
2016
- 2016-10-26 CN CN201621173787.2U patent/CN206195789U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861771A (en) * | 2019-03-22 | 2019-06-07 | 上海控创信息技术股份有限公司 | Rail traffic LTE wireless communication system adjacent-channel interference power device and test method |
| CN109861771B (en) * | 2019-03-22 | 2022-01-14 | 上海控创信息技术股份有限公司 | Adjacent channel interference power device and testing method for rail transit LTE wireless communication system |
| CN111553995A (en) * | 2020-04-30 | 2020-08-18 | 重庆长安汽车股份有限公司 | Method, apparatus, system computer readable storage medium for ETC detection of vehicles off-line from production line |
| CN114157373A (en) * | 2021-12-06 | 2022-03-08 | 上海中铁通信信号测试有限公司 | Rail transit wireless communication interference test method and device |
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