CN207352068U - Track-circuit signalling detection device - Google Patents
Track-circuit signalling detection device Download PDFInfo
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- CN207352068U CN207352068U CN201720809621.3U CN201720809621U CN207352068U CN 207352068 U CN207352068 U CN 207352068U CN 201720809621 U CN201720809621 U CN 201720809621U CN 207352068 U CN207352068 U CN 207352068U
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- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000012545 processing Methods 0.000 claims abstract description 22
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- 238000006243 chemical reaction Methods 0.000 claims description 18
- 238000004891 communication Methods 0.000 claims description 9
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- 235000013399 edible fruits Nutrition 0.000 claims 1
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- 230000005611 electricity Effects 0.000 description 6
- 238000005314 correlation function Methods 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 3
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Abstract
It the utility model is related to a kind of track-circuit signalling detection device, including isolated variable filter circuit, isolating amplifier circuit, comparison means, warning circuit and power circuit, isolated variable filter circuit connects isolating amplifier circuit, isolating amplifier circuit connects comparison means, comparison means connects warning circuit, power circuit connects comparison means, processing is being filtered after isolated variable is carried out to track circuit voltage by isolated variable filter circuit, isolation enhanced processing is carried out to the filtered signal of isolated variable again, it effectively prevent railway voltage phase distortion, comparison means handles railway voltage signal, and by power circuit voltage as the reference voltage, obtained handling result accuracy is high.
Description
Technical field
Field of electronics is the utility model is related to, more particularly to a kind of track-circuit signalling detection device.
Background technology
Track circuit is widely used in field of track traffic, it is that Rail Transit System operation realization automatically controls and remotely
The essential equipment of monitoring.Pass through the detection to voltage signal and phase signal in track circuit, it is possible to achieve row
Whether car positioning, judge current orbit by train occupation；It is the information transmission between rail vehicle and control ground at the same time
Passage, ensures control rail vehicle safe operation.In the Rail Transit System of reality, it is necessary to take accurate, reliable method
The voltage and phase signal of measure track circuit, determine the service condition of track, ensure that rail vehicle is safe for operation.
Due to being doped with many interference signals in track circuit, it is not a kind of preferable sine wave signal, so as to lead
The voltage in track circuit is caused to be fluctuated in some region, traditional side handled the interference signal adulterated in railway voltage
Method has directly to be filtered using voltage comparator circuit or direct filter circuit, and if directly using voltage comparator circuit to doping
The signal of interference is handled, then it is difficult to ensure that output is a kind of preferable square-wave signal, additionally, due to filter circuit sheet
Body can change the phase of voltage signal, and there is also the error of phase, if directly filtered using filter circuit to signal
Ripple processing, will cause the phase distortion of voltage signal in track circuit, the error of phase after processor carries out calculating processing
By bigger, it can be seen that, traditional track-circuit signalling detection device can cause phase distortion, and detection error is big.
Utility model content
Based on this, it is necessary to for traditional track signal detection device detection error it is big the problem of, there is provided one kind detection
The high track-circuit signalling detection device of accuracy.
A kind of track-circuit signalling detection device, including isolated variable filter circuit, isolating amplifier circuit, comparison means,
Warning circuit and power circuit, the isolated variable filter circuit connect the isolating amplifier circuit, the isolating amplifier circuit
The comparison means is connected, the comparison means connects the warning circuit, and the power circuit connects the comparison means.
Isolated variable filter circuit receives track circuit voltage, send isolated variable filtered track circuit voltage to every
From amplifying circuit；Isolating amplifier circuit, which is sent, isolates amplified track circuit voltage；Comparison means receives track circuit voltage
The supply voltage sent with power circuit, sends alarm command to warning circuit.
Above-mentioned track-circuit signalling detection device, isolated variable filter circuit receive the railway voltage signal of track circuit,
Isolated variable filtering process is carried out to railway voltage signal, and the voltage signal after processing is sent to isolating amplifier circuit and is carried out
Isolate enhanced processing, and the railway voltage signal after isolation enhanced processing is sent to comparison means, power circuit and sends power supply
Voltage signal to comparison means, comparison means according to the railway voltage signal after the power supply voltage signal of reception and processing at
Reason obtains handling result, and handling result is the voltage effective value of track circuit, the voltage effective value of power circuit and track are electric
The phase difference of the voltage on road and the voltage of power circuit, if any one of handling result is not in pre-set safe range value
It is interior, then alarm command is sent to warning circuit, so that warning circuit sends alarm signal, reminds related personnel to survey track
Survey, processing be filtered again after carrying out isolated variable processing to the railway voltage signal of input by isolated variable filter circuit,
Isolation enhanced processing is carried out to the filtered signal of isolated variable again, effectively prevent railway voltage phase distortion, comparison means
Railway voltage signal is handled, and, obtained handling result accuracy is high by power circuit voltage as the reference voltage.
Brief description of the drawings
Fig. 1 is an embodiment middle orbit circuit signal detecting device structure chart；
Fig. 2 is the structure chart of isolated variable filter circuit in an embodiment；
Fig. 3 is the structure chart of isolating amplifier circuit in an embodiment；
Fig. 4 is another embodiment middle orbit circuit signal detecting device structure chart.
Embodiment
In one embodiment, as shown in Figure 1, a kind of track-circuit signalling detection device, including isolated variable filtered electrical
Road 110, isolating amplifier circuit 120, comparison means 130, warning circuit 140 and power circuit 150, isolated variable filter circuit
110 connection isolating amplifier circuits 120, isolating amplifier circuit 120 connect comparison means 130, and comparison means 130 connects warning circuit
140, power circuit 150 connects comparison means 130.
Specifically, isolated variable filter circuit 110 receive track circuit railway voltage signal, to railway voltage signal into
Row isolated variable filtering process, and the voltage signal after processing is sent to isolating amplifier circuit 120 and carries out isolation enhanced processing,
And the railway voltage signal after isolation enhanced processing is sent to comparison means 130, power circuit 150 and sends power supply voltage signal
To comparison means 130, comparison means 130 is handled according to the railway voltage signal after the power supply voltage signal of reception and processing
Handling result is obtained, handling result is the voltage effective value of track circuit, the voltage effective value of power circuit 150 and track are electric
The phase difference of the voltage on road and the voltage of power circuit 150, if handling result is sent out not in pre-set safe range value
Alarm command is sent, so that warning circuit 140 sends alarm signal, to remind related personnel to survey track to warning circuit 140
Survey.
Above-mentioned track-circuit signalling detection device, by being filtered again after 110 isolated variable of isolated variable filter circuit
Processing, then isolation enhanced processing is carried out to the filtered signal of isolated variable, railway voltage phase distortion is effectively prevent, is compared
Device 130 handles railway voltage signal, and, obtained handling result is accurate by power circuit voltage as the reference voltage
Degree is high.
In one embodiment, as shown in Fig. 2, isolated variable filter circuit 110 is believed including sequentially connected voltage and current
Number conversion circuit 111, current signal isolation circuit 112, current signal conversion circuit 113, current and voltage signals conversion circuit 114
With filter circuit 115, filter circuit 115 connects isolating amplifier circuit 120.
Specifically, current signal isolation circuit 112 is SPT205 current transformers, and SPT205 is that a kind of accurate electric current is mutual
Sensor, accuracy reach milliampere level, its input and output rated current is 2mA, and primary current and secondary current are equal；
Isolated variable filtering circuit 110 disconnects rail using major component of the SPT205 current transformers as isolated variable filter circuit 110
Direct circuit connection between road circuit and track-circuit signalling detection device, ensures track circuit and track-circuit signalling detection
The earth level at device both ends prevents infringement of the loop current to electric potential signals at different levels not on same benchmark.
Further, voltage and current signal conversion circuit 111 is used to railway voltage signal being converted to current signal, at this
In embodiment, voltage and current signal conversion circuit 111 is resistance；Current signal conversion circuit 113 is used for will be through SPT205 electric currents
Signal after mutual inductor isolation is transformed to low current according to preset ratio, facilitates comparison means 130 direct to the signal after conversion
Handled, in the present embodiment, high low signal is defined with magnitude of voltage, and magnitude of voltage 0-5V is small-signal, and magnitude of voltage is big
In 5V be big signal；Current and voltage signals conversion circuit 114 is used for the low current signal for exporting current signal conversion circuit 113
Be converted to voltage signal；Filter circuit 115 is used to filter out the not clutter in default frequency range, samples out the letter in default frequency range
Number, and send to isolating amplifier circuit 120, noise jamming is effectively avoided, subsequent phase distortion can be avoided.
In one embodiment, as shown in figure 3, isolating amplifier circuit 120 includes, sequentially connected signal is same mutually to follow electricity
Road 121, signal in-phase amplification circuit 122, DC component supercircuit 123 and voltage follower circuit 124, voltage follower circuit
124 connection comparison means 130.
Specifically, signal is the same as the filter circuit 115 for mutually following circuit 110 to connect isolated variable filter circuit 110, filtered electrical
The signal that road 115 exports, with circuit 121 is mutually followed, realizes signal isolation by signal, and ensures output voltage stabilization, and signal is same
Phase amplifying circuit 122 is used for the signal after ratio enlargement isolation, and amplified signal is sent to DC component supercircuit 123
The purpose of middle superposition DC component, ratio enlargement and superposition DC component is provided to improve more accurate degree, finally passes through again
Voltage follower circuit 124 ensures the output voltage stabilization after superposition DC component, and sends to comparison means 130.
In one embodiment, comparison means 130 includes A/D convertor circuit and comparator, A/D convertor circuit connection comparator
With isolating amplifier circuit 120, comparator connection warning circuit 140 and power circuit 150.
Specifically, the voltage follower circuit 124 of AD conversion circuits connection isolating amplifier circuit 120, A/D convertor circuit is used for
The supply voltage that output voltage signal and power circuit 150 to the voltage follower circuit 124 of reception export carries out analog-to-digital conversion,
And the signal for setting two same frequencys is locally supplied power source signal X (t) and track-circuit signalling Y (t) respectively, is expressed as：
X (t)=A sin (ω t+ θ)+Nx(t) (2)
Wherein, X (t) is locally supplied power source's signal, and Y (t) is track-circuit signalling, and φ is the phase difference value of two signals, frequency
Rate is 25HZ, Nx(t) and Ny(t) be respectively locally supplied power source's signal and track-circuit signalling noise signal.
Show that their correlation function is by two signals：
Wherein, Rxy(τ) is correlation function, and T is the cycle.
When τ takes 0, correlation function is：
Phase difference is drawn by correlation function：
Wherein, A is the amplitude of locally supplied power source's signal, and B is the amplitude of track-circuit signalling.
By correlation function, the amplitude for calculating two signals is：
Comprehensive (5), (6), (7) can obtain, and the phase difference of two signals is：
In A/D convertor circuit the calculation formula of phase difference is obtained to being handled again by comparator calculating after discrete processes
For：
Wherein, N is the total points of sampling, and x (n) is locally supplied power source's signal of n-th sampling, and y (n) is the rail of n-th sampling
Road circuit signal.
According to how Gui Si Tedingli, frequency band be F continuous signal f (t) can use series of discrete sampled value f (t1), f
(t1 ± Δs t), f (± 2 Δ t) of t1 ..., can basis as long as time interval Δ t≤1/ (2F) of these sampled points to represent
Each sampled value recovers original signal f (t) completely.Consider the influence of random noise, sampled, passed through according to the frequency of 1kHz
The timer interruption of comparator reads the A/D sampled values of two paths respectively, each second sampled data is handled, and preserve
Sampled value is into array, after the sampled value for adopting enough N number of point, first passes through to average and obtains the DC component of two signals, then
Each sampled value subtracts the original value being worth to before signal is raised of DC component, and original value at this time can just substitute into formula
(9), the auto-correlation of two signals and the value of cross-correlation are obtained respectively, may finally obtain the phase difference of two signals.
It is above-mentioned specifically power supply voltage signal and track-circuit signalling are carried out processing be calculated power supply voltage signal and
The implementation of phase difference between track-circuit signalling can realize that listed above is only an implementation with existing mode
Mode in example.
The calculating of railway voltage virtual value and supply voltage virtual value is realized based on existing calculation formula, calculation formula
It is as follows：
In some signal period, heat caused by a pure load is produced with a DC voltage in same load
When raw heat is equal, the numerical value of the DC voltage is exactly the virtual value of alternating voltage.For load resistance R, alternating voltage u
(t) heat produced is:
DC voltage UZ loads the heat produced on R herein:
It can be obtained by the definition of voltage effective value, W1=W2, therefore voltage effective value is：
According to sampling thheorem, in order to calculate voltage effective value, it is necessary to carry out discrete sampling to signal, pass through comparison means
130 couples of u (t) carry out equal interval sampling, obtain the signal combination of a series of time discrete, then ask it to have by numerical integration
Valid value, the voltage effective value calculation formula finally obtained are as follows:
Wherein, UrmsFor voltage effective value, N is to sample total quantity, ukFor the magnitude of voltage of kth sub-sampling.
Comparison means 130 carries out handling everywhere according to the railway voltage signal after the power supply voltage signal of reception and processing
Reason is as a result, handling result is voltage effective value, the voltage effective value of power circuit 150 and the electricity of track circuit of track circuit
Pressure and power circuit 150 voltage phase difference, if any one of handling result not in pre-set safe range value,
Then send alarm signal.
In another embodiment, comparison means 130 is STM32F103 chips.
Specifically, analog-to-digital conversion and the function of comparing can be also realized by STM32F103 chips.
In one embodiment, railway voltage signal supervisory instrument further includes parameter setting circuit 170, parameter setting circuit
170 connection comparison means 130.
Specifically, parameter setting circuit 170 is used for after detection device start operation for the first time, pre-sets railway voltage
Safe range value, the safety of phase difference between the safe range value of 25HZ supply voltages and track circuit and 25HZ power supplys
Value range.
In one embodiment, railway voltage signal supervisory instrument further includes telecommunication circuit 160, and comparison means 130 connects
Telecommunication circuit 160, comparison means 130 are used to connect host computer 200 by telecommunication circuit 160.
Specifically, handling result is sent to host computer 200 by comparison means 130 by telecommunication circuit 160.Telecommunication circuit
160 be wire communication circuit or radio communication circuit, and wire communication circuit is serial communication interface, can be USB or RS485
It is at least one of WIFI devices, GPRS devices and blue-tooth device Deng, radio communication circuit.Host computer 200 receives processing
As a result, convenient store handling result, and track circuit voltage is monitored in real time.
In one embodiment, railway voltage signal supervisory instrument further includes display circuit 180, and display circuit 180 connects
Comparison means 130.
Specifically, handling result is sent to display circuit 180 and is shown by comparison means 130, facilitates staff real
When check handling result.
In one embodiment, warning circuit 140 is audible-visual annunciator.
Specifically, audible-visual annunciator is a kind of alarm signal for sending warning signal to people by sound and various light
Device, when any one of handling result is not in pre-set safe range value, then sends alarm signal, reminds relevant people
Member surveys track in time, improves the security of track.
In one more detailed embodiment, as shown in figure 4, when track-circuit signalling detection device is started shooting for the first time,
The voltage security scope of the voltage security value range of track circuit, power circuit 150 is pre-set by parameter setting circuit 170
The phase difference safe range value of the voltage of the voltage and power circuit 150 of value and track circuit, voltage and current signal conversion electricity
Road 111 receives railway voltage signal, and railway voltage signal is converted to current signal, is isolated by SPT205 current transformers
Afterwards, the current signal after isolation is sent to current signal conversion circuit 112, if current signal is more than preset value, by track electricity
Pressure signal is converted to the small-signal in preset range value by preset ratio, and transformed current signal is sent to electric current electricity
Voltage conversion circuit is converted into voltage signal, and transformed voltage signal is sent into filter circuit 115 and is filtered, and defeated
Signal to same mutually follow in circuit 121 of signal for going out default frequency range is isolated, and signal in-phase amplification circuit 122 is put for ratio
Signal after big isolation, amplified signal is sent into DC component supercircuit 123 and is superimposed DC component, is finally led to again
Overvoltage follows circuit 124 to ensure the output voltage stabilization after superposition DC component, and sends to comparison means 130, power supply electricity
Road 150 sends power supply voltage signal to comparison means 130, after comparison means 130 is according to the power supply voltage signal of reception and processing
Railway voltage signal handled to obtain handling result, handling result is voltage effective value, the power circuit 150 of track circuit
Voltage effective value and track circuit voltage and power circuit 150 voltage phase difference, and handling result passed through logical
Letter circuit 160, which is sent to host computer 200, to be stored, and is sent into display circuit 170 and shown at the same time, if handling result
Any one of not in pre-set safe range value, then warning circuit 140 sends alarm signal, reminds related personnel couple
Track is surveyed.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the utility model, its description is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that the common skill for this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
- A kind of 1. track-circuit signalling detection device, it is characterised in that including isolated variable filter circuit, isolating amplifier circuit, Comparison means, warning circuit and power circuit, the isolated variable filter circuit connect the isolating amplifier circuit, the isolation Amplifying circuit connects the comparison means, and the comparison means connects the warning circuit, and the power circuit connects the ratio Compared with device；The isolated variable filter circuit receives the railway voltage signal of track circuit, and the railway voltage signal is isolated Convert filtering process, obtain the filtered railway voltage signal of isolated variable and send to the isolating amplifier circuit, it is described every The filtered railway voltage signal of the isolated variable for isolating amplification reception from amplifying circuit obtains isolating amplified track Voltage signal is simultaneously sent to the comparison means, and the power circuit sends power supply voltage signal to the comparison means, described Comparison means receives the amplified railway voltage signal of the isolation and the power supply voltage signal is handled to obtain processing knot Fruit, when the handling result is not in pre-set safe range, sends alarm command to the warning circuit, the report Alert circuit sends alarm signal according to the alarm command of reception.
- 2. track-circuit signalling detection device according to claim 1, it is characterised in that the isolated variable filter circuit Including sequentially connected voltage and current signal conversion circuit, current signal isolation circuit, current signal conversion circuit, Current Voltage Signaling conversion circuit and filter circuit, the filter circuit connect the isolating amplifier circuit.
- 3. track-circuit signalling detection device according to claim 2, it is characterised in that the current signal isolation circuit For SPT205 current transformers.
- 4. track-circuit signalling detection device according to claim 1, it is characterised in that the isolating amplifier circuit includes Sequentially connected signal is same mutually to follow circuit, signal in-phase amplification circuit, DC component supercircuit and voltage follower circuit, institute State voltage follower circuit and connect the comparison means.
- 5. track-circuit signalling detection device according to claim 1, it is characterised in that the comparison means turns including AD Circuit and comparator are changed, the A/D convertor circuit connects the comparator and the isolating amplifier circuit, the comparator connection The warning circuit and the power circuit.
- 6. track-circuit signalling detection device according to claim 1, it is characterised in that parameter setting circuit is further included, The parameter setting is electrically connected the comparison means.
- 7. track-circuit signalling detection device according to claim 1, it is characterised in that telecommunication circuit is further included, it is described Comparison means connects the telecommunication circuit, and the comparison means connects host computer by the telecommunication circuit.
- 8. track-circuit signalling detection device according to claim 7, it is characterised in that the telecommunication circuit is cable modem Believe circuit or radio communication circuit.
- 9. track-circuit signalling detection device according to claim 8, it is characterised in that the wire communication circuit is string Port communications interface, the radio communication circuit are at least one in WIFI devices, blue-tooth device and GPRS devices.
- 10. track-circuit signalling detection device according to claim 1, it is characterised in that display circuit is further included, it is described Display circuit connects the comparison means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720809621.3U CN207352068U (en) | 2017-07-05 | 2017-07-05 | Track-circuit signalling detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720809621.3U CN207352068U (en) | 2017-07-05 | 2017-07-05 | Track-circuit signalling detection device |
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| Publication Number | Publication Date |
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| CN207352068U true CN207352068U (en) | 2018-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720809621.3U Expired - Fee Related CN207352068U (en) | 2017-07-05 | 2017-07-05 | Track-circuit signalling detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061269A (en) * | 2018-07-30 | 2018-12-21 | 航天银山电气有限公司 | A kind of signal sample circuit and signal sampling device |
| CN111722013A (en) * | 2020-06-24 | 2020-09-29 | 合肥工大高科信息科技股份有限公司 | Method and system for detecting 25hz phase-sensitive track circuit signal |
-
2017
- 2017-07-05 CN CN201720809621.3U patent/CN207352068U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061269A (en) * | 2018-07-30 | 2018-12-21 | 航天银山电气有限公司 | A kind of signal sample circuit and signal sampling device |
| CN111722013A (en) * | 2020-06-24 | 2020-09-29 | 合肥工大高科信息科技股份有限公司 | Method and system for detecting 25hz phase-sensitive track circuit signal |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180511 |