CN103743957B - Field intensity test start device - Google Patents
Field intensity test start device Download PDFInfo
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- CN103743957B CN103743957B CN201310697180.9A CN201310697180A CN103743957B CN 103743957 B CN103743957 B CN 103743957B CN 201310697180 A CN201310697180 A CN 201310697180A CN 103743957 B CN103743957 B CN 103743957B
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Abstract
The present invention relates to field strength measurement and start instrument, comprise control module, operation display unit, channel device unit; Described control module is connected and composed by CPU, the first filtering Circuit tuning, the second filtering Circuit tuning, operational amplifier and power-switching circuit; Start instrument CPU by field strength measurement and produce 218.1Hz infrasonic and the FFSK signaling comprising site, launch time, launched by PTT control channel machine; Wherein FFSK, 218.1Hz signaling produces by programmed control CPU inside, by active filter C, filter shape is carried out to FFSK signal, digital regulation resistance A adjusts signal magnitude, by active filter D, filter shape is carried out to 218.1Hz sub-audio signal, adjust signal magnitude by digital regulation resistance B; By operational amplifier, further adjustment is done to FFSK, 218.1Hz signal, its beneficial effect is: in field intensity test process, at the appointed time control station radio set along the line by this equipment and launch field strength measurement carrier wave, can compatibility standard B, C standard, simple to operate, easy to carry, cost is low, meets field demand.
Description
Technical field
The present invention relates to a kind of field intensity test start device, particularly a kind of field intensity test start device for 450MHz railway wireless train dispatching system.
Background technology
Railway wireless train adjusts communication system mainly to complete large triangle (communication between yardman, station, locomotive/vehicle commander) communication and little triangle (communicating between Platform attendant, locomotive/vehicle commander) communication function, is the basis ensureing railway operation safety.During in guarantee, Railroad Communication System normally works, field strength measurement is absolutely necessary link.Field intensity is the abbreviation of electric field intensity, and it is the size of antenna at some place, space electrical signal of reaction, to characterize the electric field intensity of this point.When will carry out signal optimizing to a certain area, the quality understanding platform quorum sensing inhibitor situation will carry out field strength measurement to surrounding enviroment, to obtain real radio wave field strength coverage condition.For ensureing that Railroad Communication System normally works, railway operation maintainer needs to test the wireless field density of main operating line every year.
In field intensity test process, need each station radio set along the line at the appointed time to launch field strength measurement carrier wave, coordinate other equipment to realize field strength measurement function.The requirement of field strength measurement carrier wave at the appointed time launched to station console very high, the normal talking of station console can not be affected, at the appointed time launch again, also need each platform along the line to be equipped with tester's control platform and enter test mode, need the manpower of at substantial, material resources.
Carry out field strength measurement easily in order to more convenient, need a kind of field intensity test start device at the appointed time to control station radio set along the line and launch field strength measurement carrier wave, coordinate other equipment to realize field strength measurement function.And coordinate the different systems of station console, and can compatibility standard B, C standard, to arrange, simple to operate, easy to carry, be beneficial to onsite application.
Summary of the invention
Object of the present invention is exactly the deficiency in view of prior art exists, a kind of field strength measurement is provided to start the design proposal of instrument, in field intensity test process, at the appointed time control station radio set along the line by this equipment and launch field strength measurement carrier wave, coordinate other equipment to realize field strength measurement function.And coordinate the different systems of station console, and can compatibility standard B, C standard, this equipment is arranged, simple to operate, easy to carry, reduces the cost of system, meets field demand.
For achieving the above object, the technical scheme taked is: field intensity test start device in the present invention, and its feature exists
In: comprise control module, operation display unit, channel device unit;
Described control module is connected and composed by CPU, the first filtering Circuit tuning, the second filtering Circuit tuning, operational amplifier and power-switching circuit;
CPU adopts ATMEGA128 chip;
First filtering Circuit tuning is connected and composed by digital regulation resistance A and wave filter C;
Second filtering Circuit tuning is connected and composed by digital regulation resistance B and filter D;
The PB5 port of CPU is connected input end with the first filtering Circuit tuning; The PE0 port of CPU is connected input end with the second filtering Circuit tuning; The input end of two filtering Circuit tuning output terminal concatenation operation amplifiers, output terminal connecting channel machine cells D TIN port and the CTIN port respectively of operational amplifier;
PB0 port (PTT(Push-to-Talk) signal of CPU) direct connecting channel machine unit PTT port;
PC0-PC6, PA1-PA7 port of CPU is connected with operation display unit;
Power-switching circuit connects external power supply, for control module, operation display unit provide DC5V power supply;
The PC0-PC6(communication of the CPU of control module) port is connected with the liquid crystal end of operation display unit, and the PA1-PA7 port of the CPU of control module is connected with the button end of operation display unit;
Channel device unit external power supply (battery), for unit each in field intensity test start device is powered.
Power-switching circuit connects external power supply, for control module, operation display unit provide DC5V power supply;
Start instrument CPU by field strength measurement and produce 218.1Hz sub-audio signal and the FFSK signaling comprising site, launch time, launched by PTT control channel machine; Wherein FFSK, 218.1Hz signaling produces by CPU, filtering Circuit tuning carries out filter shape by active filter C to FFSK signal, digital regulation resistance A adjusts signal magnitude, by active filter D, filter shape is carried out to 218.1Hz sub-audio signal, adjust signal magnitude by digital regulation resistance B; Due to channel device difference, export frequency deviation for preventing FFSK, 218.1Hz signal and go beyond the scope, increase signal amplitude regulating circuit, by operational amplifier, further adjustment is done to FFSK, 218.1Hz signal.
Described field intensity test start device is utilized to comprise the step that 450MHz railway wireless train dispatching system carries out field strength measurement:
A) in field intensity test process, described field intensity test start device is provided on field strength measurement train, starts station radio set along Along Railway and enter field strength measurement pattern;
B) in described field intensity test start device, input site and the start-up time of corresponding station radio set, start corresponding station radio set;
C) test the field intensity index of present scope, after station radio set arrives the test duration of specifying, station radio set will recover original duty;
D) control module of field strength measurement startup instrument is connected with channel device unit, operation display unit respectively; Channel device unit is connected with external power supply (battery), by the key information of control module process from operation display unit, and work state information is fed back to display unit, and control channel machine sends field strength measurement signaling;
E) when this equipment to start station radio set enter field strength measurement pattern time, need on field intensity test starting instrument, input corresponding station radio set site and start-up time, at this moment field strength measurement starts instrument CPU and receives key-press input site from operation display unit and temporal information, and control operation display unit LCD shows the duty of main frame;
F) start instrument CPU by field strength measurement and produce 218.1Hz infrasonic and the FFSK signaling comprising site, launch time, launched by PTT control channel machine; Wherein FFSK, 218.1Hz signaling produces by CPU, filtering Circuit tuning carries out filter shape by active filter C to FFSK signal, digital regulation resistance A adjusts signal magnitude, by active filter D, filter shape is carried out to 218.1Hz sub-audio signal, adjust signal magnitude by digital regulation resistance B;
G) due to channel device difference, export frequency deviation for preventing FFSK, 218.1Hz signal and go beyond the scope, increase signal amplitude regulating circuit, by operational amplifier, further adjustment is done to FFSK, 218.1Hz signal.
The invention has the beneficial effects as follows: in field intensity test process, at the appointed time control station radio set along the line by this equipment and launch field strength measurement carrier wave, coordinate other equipment to realize field strength measurement function.And coordinate the different systems of station console, and can compatibility standard B, C standard, this equipment is arranged, simple to operate, easy to carry, reduces the cost of system, meets field demand.
Accompanying drawing explanation
Fig. 1 is invention using state schematic diagram;
Fig. 2 is external interface schematic diagram of the present invention;
Fig. 3 is the inner principle schematic of the present invention.
Embodiment
For a more clear understanding of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments:
As shown in Figure 1 to Figure 3, field intensity test start device comprises control module, operation display unit, channel device unit;
Control module is connected and composed by CPU, the first filtering Circuit tuning, the second filtering Circuit tuning, operational amplifier and power-switching circuit;
CPU adopts ATMEGA128 chip;
First filtering Circuit tuning is connected and composed by digital regulation resistance A and wave filter C;
Second filtering Circuit tuning is connected and composed by digital regulation resistance B and filter D;
The PB5 port of CPU is connected input end with the first filtering Circuit tuning; The PE0 port of CPU is connected input end with the second filtering Circuit tuning; The input end of two filtering Circuit tuning output terminal concatenation operation amplifiers, output terminal connecting channel machine cells D TIN port and the CTIN port respectively of operational amplifier;
PB0 port (PTT(Push-to-Talk) signal of CPU) direct connecting channel machine unit PTT port;
PC0-PC6, PA1-PA7 port of CPU is connected with operation display unit;
Power-switching circuit connects external power supply, for control module, operation display unit provide DC5V power supply;
Channel device unit external power supply (battery), for unit each in field intensity test start device is powered.
Start instrument CPU by field strength measurement and produce 218.1Hz infrasonic and the FFSK signaling comprising site, launch time, launched by PTT control channel machine; Wherein FFSK, 218.1Hz signaling produces by CPU, filtering Circuit tuning carries out filter shape by active filter C to FFSK signal, digital regulation resistance A adjusts signal magnitude, by active filter D, filter shape is carried out to 218.1Hz sub-audio signal, adjust signal magnitude by digital regulation resistance B;
Due to channel device difference, export frequency deviation for preventing FFSK, 218.1Hz signal and go beyond the scope, increase signal amplitude regulating circuit, by operational amplifier, further adjustment is done to FFSK, 218.1Hz signal.
In field intensity test process, field strength measurement train is equipped with this equipment, starts station radio set along Along Railway and enter field strength measurement pattern.In this equipment, input site and the start-up time of corresponding station radio set, just can start corresponding station radio set.The field intensity index of test present scope.After station radio set arrives the test duration of specifying, station radio set will recover original duty.
As shown in Figure 2, the control module of field strength measurement startup instrument is connected with channel device unit, operation display unit respectively.Channel device unit is connected with external power supply (battery).Control module is used for processing key information, and work state information is fed back to display unit, and control channel machine sends field strength measurement signaling.Whole system provides power supply by accumulator, and accumulator standard output voltage is 7.2V.
As shown in Figure 3, in field intensity test process, when this equipment to start station radio set enter field strength measurement pattern time, need on field intensity test starting instrument, input corresponding station radio set site and start-up time, at this moment field strength measurement startup instrument CPU receives the input information (site and time) of button (operating unit) and control LCD shows (display unit), display unit is made up of Liquid Crystal Module and backlight control circuit, is used for showing the duty of main frame.
Field strength measurement starts the FFSK signaling that instrument CPU produces 218.1Hz infrasonic and comprises site, launch time, is launched by PTT control channel machine.Wherein FFSK, 218.1Hz signaling produces by single-chip microcomputer.Filtering Circuit tuning carries out filter shape respectively by active filter C, D to FFSK and 218.1Hz, digital regulation resistance A, B adjust signal magnitude, due to channel device difference, export frequency deviation for preventing FFSK, 218.1Hz signal and go beyond the scope, increase signal amplitude regulating circuit.Operational amplifier does further adjustment to FFSK, 218.1Hz signal.
When station radio set receives field intensity startup signaling (FFSK and the 218.1Hz signaling that field strength measurement starts instrument transmitting, wherein carry site and start-up time in FFSK signaling) after, namely station radio set enters into field strength measurement pattern, launches field strength measurement carrier wave, completes field strength measurement work.After station radio set arrives the test duration of specifying, station radio set will recover original duty.
According to the above description, the solution of the present invention can be realized in conjunction with art technology.
Claims (2)
1. field strength measurement starts instrument, it is characterized in that: comprise control module, operation display unit, channel device unit; Described control module is connected and composed by CPU, the first filtering Circuit tuning, the second filtering Circuit tuning, operational amplifier and power-switching circuit;
CPU adopts ATMEGA128 chip;
First filtering Circuit tuning is connected and composed by digital regulation resistance A and wave filter C;
Second filtering Circuit tuning is connected and composed by digital regulation resistance B and filter D;
The PB5 port of CPU is connected with the first filtering Circuit tuning input end; The PE0 port of CPU is connected with the second filtering Circuit tuning input end; The input end of two filtering Circuit tuning output terminal concatenation operation amplifiers, output terminal connecting channel machine cells D TIN port and the CTIN port respectively of operational amplifier;
The PTT signal direct connecting channel machine unit PTT port of the PB0 port of CPU;
PC0-PC6, PA1-PA7 port of CPU is connected with operation display unit;
Power-switching circuit connects external power supply, for control module, operation display unit provide DC5V power supply;
The PC0-PC6 communication port of the CPU of control module is connected with the liquid crystal end of operation display unit, and the PA1-PA7 port of the CPU of control module is connected with the button end of operation display unit;
Described external power supply is that in field strength measurement startup instrument, channel device unit is powered;
Start instrument CPU by field strength measurement and produce 218.1Hz sub-audio signal and the FFSK signaling comprising site, launch time, launched by PTT control channel machine; Wherein FFSK, 218.1Hz signaling produces by programmed control CPU inside, filtering Circuit tuning carries out filter shape by active filter C to FFSK signal, digital regulation resistance A adjusts signal magnitude, by active filter D, filter shape is carried out to 218.1Hz sub-audio signal, adjust signal magnitude by digital regulation resistance B; Due to channel device difference, export frequency deviation for preventing FFSK, 218.1Hz signal and go beyond the scope, increase signal amplitude regulating circuit, by operational amplifier, further adjustment is done to FFSK, 218.1Hz signal.
2. utilize field strength measurement described in claim 1 to start instrument to comprise the step that 450MHz railway wireless train dispatching system carries out field strength measurement:
A) in field intensity test process, described field strength measurement is started instrument and is provided on field strength measurement train, start station radio set along Along Railway and enter field strength measurement pattern;
B) start the site and the start-up time that input corresponding station radio set in instrument at described field strength measurement, start corresponding station radio set;
C) test the field intensity index of present scope, after station radio set arrives the test duration of specifying, station radio set will recover original duty;
D) control module of field strength measurement startup instrument is connected with channel device unit, operation display unit respectively; Channel device unit is connected with external power supply battery, by the key information of control module process from operation display unit, and work state information is fed back to display unit, and control channel machine sends field strength measurement signaling;
E) when field intensity test starting instrument to start station radio set enter field strength measurement pattern time, need on field intensity test starting instrument, input corresponding station radio set site and start-up time, at this moment field strength measurement starts instrument CPU and receives key-press input site from operation display unit and temporal information, and control operation display unit LCD shows the duty of main frame;
F) start instrument CPU by field strength measurement and produce 218.1Hz infrasonic and the FFSK signaling comprising site, launch time, launched by PTT control channel machine; Wherein FFSK, 218.1Hz signaling produces by CPU, filtering Circuit tuning carries out filter shape by active filter C to FFSK signal, digital regulation resistance A adjusts signal magnitude, by active filter D, filter shape is carried out to 218.1Hz sub-audio signal, adjust signal magnitude by digital regulation resistance B;
G) due to channel device difference, export frequency deviation for preventing FFSK, 218.1Hz signal and go beyond the scope, increase signal amplitude regulating circuit, by operational amplifier, further adjustment is done to FFSK, 218.1Hz signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310697180.9A CN103743957B (en) | 2013-12-18 | 2013-12-18 | Field intensity test start device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310697180.9A CN103743957B (en) | 2013-12-18 | 2013-12-18 | Field intensity test start device |
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| CN103743957A CN103743957A (en) | 2014-04-23 |
| CN103743957B true CN103743957B (en) | 2016-01-06 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103983300A (en) * | 2014-05-26 | 2014-08-13 | 天津七一二通信广播有限公司 | Train number device tester |
| CN106851569A (en) * | 2017-01-19 | 2017-06-13 | 北京北交信控科技有限公司 | A kind of 450MHz train dispatch radio communications network test method and system |
| WO2018194686A1 (en) * | 2017-04-21 | 2018-10-25 | Hewlett-Packard Development Company, L.P. | Signal modifier for self-cooling headsets |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002028122A2 (en) * | 2000-09-29 | 2002-04-04 | Qualcomm Incorporated | Method and apparatus for performing a candidate frequency search in a wireless communication system |
| CN201435728Y (en) * | 2009-07-17 | 2010-03-31 | 天津七一二通信广播有限公司 | GPS information-based automatic power controlling device for locomotive radio station |
| CN201742420U (en) * | 2010-07-29 | 2011-02-09 | 深圳市思科泰技术有限公司 | Portable general detecting equipment |
| CN202488468U (en) * | 2012-02-24 | 2012-10-10 | 泉州市物联电子通信有限公司 | Railway section field strength testing system |
| JP2013062664A (en) * | 2011-09-13 | 2013-04-04 | Hitachi Kokusai Electric Inc | Radio communication device |
-
2013
- 2013-12-18 CN CN201310697180.9A patent/CN103743957B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002028122A2 (en) * | 2000-09-29 | 2002-04-04 | Qualcomm Incorporated | Method and apparatus for performing a candidate frequency search in a wireless communication system |
| CN201435728Y (en) * | 2009-07-17 | 2010-03-31 | 天津七一二通信广播有限公司 | GPS information-based automatic power controlling device for locomotive radio station |
| CN201742420U (en) * | 2010-07-29 | 2011-02-09 | 深圳市思科泰技术有限公司 | Portable general detecting equipment |
| JP2013062664A (en) * | 2011-09-13 | 2013-04-04 | Hitachi Kokusai Electric Inc | Radio communication device |
| CN202488468U (en) * | 2012-02-24 | 2012-10-10 | 泉州市物联电子通信有限公司 | Railway section field strength testing system |
Non-Patent Citations (2)
| Title |
|---|
| 多制式兼容型450MHz无线列调场强测试控发设备设计;王祖元等;《中国铁路》;20130131(第1期);76-78 * |
| 无线场强测试系统的关键技术与应用;于蒙;《铁道通信信号》;20080930;第44卷(第9期);52-54 * |
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Address after: 300462 Binhai New Area, Tianjin economic and Technological Development Zone, North Street, No. 141 Patentee after: Tianjin 712 Communications Broadcasting Limited by Share Ltd Address before: 300462 Binhai New Area, Tianjin economic and Technological Development Zone, North Street, No. 141 Patentee before: Tianjin 712 Communication Broadcast Co., Ltd. |