CN103743957A - Field intensity test start device - Google Patents
Field intensity test start device Download PDFInfo
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- CN103743957A CN103743957A CN201310697180.9A CN201310697180A CN103743957A CN 103743957 A CN103743957 A CN 103743957A CN 201310697180 A CN201310697180 A CN 201310697180A CN 103743957 A CN103743957 A CN 103743957A
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Abstract
The invention relates to a field intensity test starter comprising a control unit, an operation display unit and a channel machine unit. The control unit is formed by connecting a CPU, a first filter adjusting circuit, a second filter adjusting circuit, an operational amplifier and a power conversion circuit. The CPU of the field intensity test starter generates 218.1Hz sub audio and a FFSK signaling containing site location and emission time, and the sub audio and the signaling are emitted through a PTT control channel machine. The FFSK and the 218.1Hz signals are generated inside a program control CPU, the FFSK signal is filtered and shaped by an active filter C, a digital potentiometer A adjusts the amplitude of the FFSK signal, the 218.1Hz sub audio signal is filtered and shaped by an active filter D, a digital potentiometer B adjusts the amplitude of the 218.1Hz sub audio signal, and the FFSK signal and the 218.1Hz sub audio signal are further adjusted by the operational amplifier. The field intensity test start device has the following beneficial effects: station radios along the way can emit field intensity test carriers under the control of the device at a specified time, and the device can be compatible with standard B and C systems, is simple to operate, convenient to carry and low in cost, and can satisfy field needs.
Description
Technical field
The present invention relates to a kind of field strength measurement starting outfit, particularly a kind of field strength measurement starting outfit 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 by letter between Platform attendant, locomotive/vehicle commander) communication function, is the basis that guarantees railway operation safety.Guaranteeing in the normal work of Railroad Communication System, the field strength measurement link that is absolutely necessary.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.In the time of will carrying out signal optimizing to a certain area, understand the quality of platform signal coverage varies and will carry out field strength measurement to surrounding enviroment, to obtain real radio wave field strength coverage condition.For assurance Railroad Communication System, normally work, railway operation maintainer need 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.Station console is at the appointed time launched to the requirement of field strength measurement carrier wave very high, can not affect the normal talking of station console, 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 to expend a large amount of manpowers, material resources.
For the more convenient field strength measurement that carries out easily, need a kind of field strength measurement starting outfit at the appointed time to control station radio set transmitting field strength measurement carrier wave along the line, coordinate other equipment to realize field strength measurement function.And coordinate the different systems of station console, and can compatibility standard B, C standard, arrange, simple to operate, easy to carry, be beneficial to on-the-spot use.
Summary of the invention
Object of the present invention is exactly the deficiency existing in view of prior art, provide a kind of field strength measurement to start the design proposal of instrument, in field intensity test process, by this equipment, at the appointed time control station radio set transmitting field strength measurement carrier wave along the line, 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 arranges, simple to operate, easy to carry, reduces the cost of system, meets field demand.
For achieving the above object, the technical scheme of taking is in the present invention: field strength measurement starting outfit, 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;
The first filtering Circuit tuning is connected and composed by digital regulation resistance A and wave filter C;
The 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, the output terminal of operational amplifier is connecting channel machine cells D TIN port and CTIN port respectively;
PB0 port (PTT(Push-to-Talk) signal of CPU) direct connecting channel machine unit PTT port;
PC0-PC6, the PA1-PA7 port of CPU are 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) is each unit power supply in field strength measurement starting outfit.
Power-switching circuit connects external power supply, for control module, operation display unit provide DC5V power supply;
By field strength measurement, start the FFSK signaling that instrument CPU produces 218.1Hz infrasonic signal and comprises site, launch time, by PTT control channel machine, launch; Wherein FFSK, 218.1Hz signaling produce 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, 218.1Hz infrasonic signal is carried out to filter shape, by digital regulation resistance B, adjust signal magnitude; Due to channel device difference, for preventing that FFSK, 218.1Hz signal output frequency deviation from going beyond the scope, increase signal amplitude regulating circuit, by operational amplifier, FFSK, 218.1Hz signal are done to further adjustment.
The step of utilizing described field strength measurement starting outfit to carry out field strength measurement to 450MHz railway wireless train dispatching system comprises:
A) in field intensity test process, described field strength measurement starting outfit is provided on field strength measurement train, along Along Railway, start station radio set and enter field strength measurement pattern;
B) in described field strength measurement starting outfit, input site and the start-up time of corresponding station radio set, start corresponding station radio set;
C) test the field intensity index of current scope, when station radio set arrived after 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), processes the key information from operation display unit, and work state information is fed back to display unit by control module, and control channel machine sends field strength measurement signaling;
E) when this equipment will start station radio set and enters field strength measurement pattern, need on field intensity test starting instrument, input site and the start-up time of corresponding station radio set, at this moment field strength measurement startup instrument CPU receives key-press input site and the temporal information from operation display unit, and control operation display unit LCD shows the duty of main frame;
F) by field strength measurement, start the FFSK signaling that instrument CPU produces 218.1Hz infrasonic and comprises site, launch time, by PTT control channel machine, launch; Wherein FFSK, 218.1Hz signaling produce 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, 218.1Hz infrasonic signal is carried out to filter shape, by digital regulation resistance B, adjust signal magnitude;
G) due to channel device difference, for preventing that FFSK, 218.1Hz signal output frequency deviation from going beyond the scope, increase signal amplitude regulating circuit, by operational amplifier, FFSK, 218.1Hz signal are done to further adjustment.
The invention has the beneficial effects as follows: in field intensity test process, can at the appointed time control station radio set transmitting field strength measurement carrier wave along the line by this equipment, 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 arranges, simple to operate, easy to carry, reduces the cost of system, meets field demand.
Accompanying drawing explanation
Fig. 1 is invention use view;
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, describe in conjunction with the accompanying drawings and embodiments the present invention in detail:
As shown in Figure 1 to Figure 3, field strength measurement starting outfit 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;
The first filtering Circuit tuning is connected and composed by digital regulation resistance A and wave filter C;
The 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, the output terminal of operational amplifier is connecting channel machine cells D TIN port and CTIN port respectively;
PB0 port (PTT(Push-to-Talk) signal of CPU) direct connecting channel machine unit PTT port;
PC0-PC6, the PA1-PA7 port of CPU are 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) is each unit power supply in field strength measurement starting outfit.
By field strength measurement, start the FFSK signaling that instrument CPU produces 218.1Hz infrasonic and comprises site, launch time, by PTT control channel machine, launch; Wherein FFSK, 218.1Hz signaling produce 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, 218.1Hz infrasonic signal is carried out to filter shape, by digital regulation resistance B, adjust signal magnitude;
Due to channel device difference, for preventing that FFSK, 218.1Hz signal output frequency deviation from going beyond the scope, increase signal amplitude regulating circuit, by operational amplifier, FFSK, 218.1Hz signal are done to further adjustment.
In field intensity test process, on field strength measurement train, be equipped with this equipment, along Along Railway, start station radio set 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.Test the field intensity index of current scope.When station radio set arrived after 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 will start station radio set and enters field strength measurement pattern, need on field intensity test starting instrument, input site and the start-up time of corresponding station radio set, at this moment field strength measurement startup instrument CPU receives the input message (site and time) of button (operating unit) and controls LCD and shows (display unit), display unit is comprised 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, by PTT control channel machine, launches.Wherein FFSK, 218.1Hz signaling produce by single-chip microcomputer.Filtering Circuit tuning carries out filter shape by active filter C, D to FFSK and 218.1Hz respectively, digital regulation resistance A, B adjust signal magnitude, due to channel device difference, for preventing that FFSK, 218.1Hz signal output frequency deviation from going beyond the scope, and increases signal amplitude regulating circuit.Operational amplifier does further adjustment to FFSK, 218.1Hz signal.
When station radio set, receive field strength measurement and start field intensity startup signaling (FFSK and the 218.1Hz signaling of instrument transmitting, wherein in FFSK signaling, carry site and start-up time) after, station radio set enters into field strength measurement pattern, and transmitting field strength measurement carrier wave, completes field strength measurement work.When station radio set arrived after the test duration of specifying, station radio set will recover original duty.
According to the above description, in conjunction with art technology, can realize the solution of the present invention.
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;
The first filtering Circuit tuning is connected and composed by digital regulation resistance A and wave filter C;
The 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, the output terminal of operational amplifier is connecting channel machine cells D TIN port and CTIN port respectively;
The direct connecting channel machine of the PTT signal unit PTT port of the PB0 port of CPU;
PC0-PC6, the PA1-PA7 port of CPU are 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;
Channel device unit external power supply is each unit power supply in field strength measurement starting outfit;
By field strength measurement, start the FFSK signaling that instrument CPU produces 218.1Hz infrasonic signal and comprises site, launch time, by PTT control channel machine, launch; Wherein FFSK, 218.1Hz signaling produce by programmed control CPU is inner, 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, 218.1Hz infrasonic signal is carried out to filter shape, by digital regulation resistance B, adjust signal magnitude; Due to channel device difference, for preventing that FFSK, 218.1Hz signal output frequency deviation from going beyond the scope, increase signal amplitude regulating circuit, by operational amplifier, FFSK, 218.1Hz signal are done to further adjustment.
2. utilizing field strength measurement described in claim 1 to start the step that instrument carries out field strength measurement to 450MHz railway wireless train dispatching system comprises:
A) in field intensity test process, described field strength measurement starting outfit is provided on field strength measurement train, along Along Railway, start station radio set and enter field strength measurement pattern;
B) in described field strength measurement starting outfit, input site and the start-up time of corresponding station radio set, start corresponding station radio set;
C) test the field intensity index of current scope, when station radio set arrived after 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), processes the key information from operation display unit, and work state information is fed back to display unit by control module, and control channel machine sends field strength measurement signaling;
E) when this equipment will start station radio set and enters field strength measurement pattern, need on field intensity test starting instrument, input site and the start-up time of corresponding station radio set, at this moment field strength measurement startup instrument CPU receives key-press input site and the temporal information from operation display unit, and control operation display unit LCD shows the duty of main frame;
F) by field strength measurement, start the FFSK signaling that instrument CPU produces 218.1Hz infrasonic and comprises site, launch time, by PTT control channel machine, launch; Wherein FFSK, 218.1Hz signaling produce 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, 218.1Hz infrasonic signal is carried out to filter shape, by digital regulation resistance B, adjust signal magnitude;
G) due to channel device difference, for preventing that FFSK, 218.1Hz signal output frequency deviation from going beyond the scope, increase signal amplitude regulating circuit, by operational amplifier, FFSK, 218.1Hz signal are done to further adjustment.
Priority Applications (1)
| 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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| CN201310697180.9A CN103743957B (en) | 2013-12-18 | 2013-12-18 | Field intensity test start device |
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| CN103743957A true CN103743957A (en) | 2014-04-23 |
| CN103743957B CN103743957B (en) | 2016-01-06 |
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Cited By (4)
| 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 |
| CN110463216A (en) * | 2017-04-21 | 2019-11-15 | 惠普发展公司，有限责任合伙企业 | Signal modifier for self cooled headphone |
| CN114051210A (en) * | 2021-12-08 | 2022-02-15 | 泉州市铁通电子设备有限公司 | Railway station radio station field intensity test starting device and implementation method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110463216A (en) * | 2017-04-21 | 2019-11-15 | 惠普发展公司，有限责任合伙企业 | Signal modifier for self cooled headphone |
| CN114051210A (en) * | 2021-12-08 | 2022-02-15 | 泉州市铁通电子设备有限公司 | Railway station radio station field intensity test starting device and implementation method |
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| CN103743957B (en) | 2016-01-06 |
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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. |