CN206634013U - Rail broken rail monitoring small electric current sensor - Google Patents
Rail broken rail monitoring small electric current sensor Download PDFInfo
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- CN206634013U CN206634013U CN201720174096.2U CN201720174096U CN206634013U CN 206634013 U CN206634013 U CN 206634013U CN 201720174096 U CN201720174096 U CN 201720174096U CN 206634013 U CN206634013 U CN 206634013U
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- electric capacity
- resistance
- triode
- rail
- power supply
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Abstract
The utility model discloses a kind of rail broken rail monitoring small electric current sensor, including power supply, current sampling circuit, dsp chip and signal receiving end, power supply and current sampling circuit are connected with high-pressure side winding, current sampling circuit is gathered in real time to the low current in rail broken rail monitoring system, and the current signal of collection is sent to dsp chip, current signal is converted to data signal and is sent to signal receiving end by RS485 buses by dsp chip, and power supply is connected with current sampling circuit and signal receiving end, for providing working power respectively；Power supply includes the first triode, the second triode, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the first diode, the second diode and variable inductance.The utility model disclosure satisfy that rail site environment requirement, safety and reliability are higher.
Description
Technical field
Current sensor field is the utility model is related to, more particularly to a kind of rail broken rail monitoring small electric current sensor.
Background technology
Hall current sensor is based on magnetic balance type hall principle, according to Hall effect principle, from the control of Hall element
Current terminal is passed through electric current Ic, and applies the magnetic field that magnetic field intensity is B in the normal direction of Hall element plane, then vertical
In electric current and magnetic direction (i.e. between Hall output end), a potential VH will be produced, is called Hall voltage, its size direct ratio
In control electric current I and magnetic field intensity B product.Traditional current sensor can not meet rail site environment requirement.Separately
Outside because traditional current sensor does not have current protecting function, its safety and reliability is relatively low.
Utility model content
The technical problems to be solved in the utility model is, for the drawbacks described above of prior art, there is provided one kind can expire
The higher current signal state of sufficient rail site environment requirement, safety and reliability, monitoring device work can be reached
The rail broken rail monitoring small electric current sensor of effect.
Technical scheme is used by the utility model solves its technical problem：Construct a kind of small electricity of rail broken rail monitoring
Flow sensor, including power supply, current sampling circuit, dsp chip and signal receiving end, the power supply and current sample
Circuit is connected with high-pressure side winding, and the current sampling circuit is adopted in real time to the low current in rail broken rail monitoring system
Collection, and the current signal of collection is sent to the dsp chip, the current signal is converted to digital letter by the dsp chip
Number, and the data signal is sent to the signal receiving end by RS485 buses, the power supply respectively with the electricity
Stream sample circuit connects with signal receiving end, for providing working power；
The power supply includes the first triode, the second triode, first resistor, second resistance, 3rd resistor, the 4th
Resistance, the 5th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the first diode, the two or two
Pole pipe and variable inductance, one end connection positive input terminal of the first resistor, one end connection negative input end of the second resistance,
The other end of the first resistor respectively one end with first electric capacity, one end of the second electric capacity, one end of 3rd resistor and
The colelctor electrode connection of first triode, the other end of second electric capacity one end with the 3rd electric capacity and negative output terminal respectively
Connection, the other end of the 3rd electric capacity other end with first electric capacity, the other end and the two or three of second resistance respectively
The colelctor electrode connection of pole pipe, the other end of the 3rd resistor negative electrode with first diode, the one of the 4th electric capacity respectively
End connects with the base stage of the first triode, the anode of first diode negative electrode with second diode, the 4th respectively
The other end of electric capacity, one end of the 5th electric capacity connect with a fixing end of variable inductance, the anode point of second diode
The other end, one end of the 4th resistance and the base stage of the second triode not with the 5th electric capacity are connected, second triode
Emitter stage be connected respectively with the emitter stage of first triode and the sliding end of variable inductance, the 4th resistance it is another
End is connected with the colelctor electrode of second triode, and another fixing end of the variable inductance is connected by the 5th resistance
Positive output end.
In rail broken rail monitoring small electric current sensor described in the utility model, the power supply also includes the 6th
Electric capacity, the emitter stage of second triode are connected by the 6th capacitance connection with the sliding end of the variable inductance.
In rail broken rail monitoring small electric current sensor described in the utility model, the power supply also includes the 6th
Resistance, one end of the 6th resistance are connected with the other end of the 3rd electric capacity, the other end of the 6th resistance with it is described
The colelctor electrode connection of second triode.
In rail broken rail monitoring small electric current sensor described in the utility model, the power supply also includes the 7th
Resistance, one end of the 7th resistance are connected with the other end of second electric capacity, the other end connection institute of the 7th resistance
State negative output terminal.
In rail broken rail monitoring small electric current sensor described in the utility model, the power supply also includes the 8th
Resistance, the other end of the 6th resistance are connected by the 8th resistance with the colelctor electrode of second triode.
In rail broken rail monitoring small electric current sensor described in the utility model, first triode is NPN type
Triode, second triode are PNP type triode.
Implement rail broken rail monitoring small electric current sensor of the present utility model, have the advantages that：Due to provided with
Including power supply, current sampling circuit, dsp chip and signal receiving end, current sampling circuit is to rail broken rail monitoring system
In low current gathered in real time, and the current signal of collection is sent to dsp chip, dsp chip changes current signal
For data signal, and data signal is sent to signal receiving end by RS485 buses；Power supply include the first triode,
Second triode, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the first electric capacity, the second electric capacity,
Three electric capacity, the 4th electric capacity, the 5th electric capacity, the first diode, the second diode and variable inductance, the first electric capacity are used to filter out high frequency
Clutter so that the operation of the power supply is more stable, and first resistor and second resistance are used to carry out overcurrent protection, and the rail breaks
Rail monitoring small electric current sensor has waterproof, against shock, sunscreen properties, therefore it disclosure satisfy that rail site environment uses and wants
Ask, safety and reliability it is higher.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, before creative labor is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation in the utility model rail broken rail monitoring small electric current sensor one embodiment；
Fig. 2 is the circuit theory diagrams of power supply in the embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
In the utility model rail broken rail monitoring with small electric current sensor embodiment, the rail broken rail monitoring low current
The structural representation of sensor is as shown in Figure 1.In Fig. 1, the rail broken rail monitoring with small electric current sensor include power supply 1,
Current sampling circuit 2, dsp chip 3 and signal receiving end 4, wherein, power supply 1 and current sampling circuit 2 with high-pressure side around
Group connection, current sampling circuit 2 are gathered in real time to the low current in rail broken rail monitoring system, and the electric current of collection is believed
Dsp chip 3 number is sent to, the current signal is converted to data signal by dsp chip 3, and carries out rail shape according to mathematical modeling
State is identified, while above-mentioned data signal also is sent into signal receiving end 4 by RS485 buses, power supply 1 respectively with electric current
Sample circuit 2 and signal receiving end 4 connect, for providing working power.
Fig. 2 is the circuit theory diagrams of power supply in the present embodiment, and in Fig. 2, the power supply 1 includes the first triode
Q1, the second triode Q2, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the first electricity
Hold C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5, the first diode D1, the second diode D2 and
Variable inductance L, wherein, first resistor R1 one end connection positive input terminal VIN+, second resistance R2 one end connection negative input end
VIN-, first resistor the R1 other end one end with the first electric capacity C1, the second electric capacity C2 one end, the one of 3rd resistor R3 respectively
End connects with the first triode Q1 colelctor electrode, the second electric capacity C2 other end one end with the 3rd electric capacity C3 and negative output respectively
Hold VOUT- connections, the 3rd electric capacity C3 other end other end with the first electric capacity C1, the second resistance R2 other end and the respectively
Two triode Q2 colelctor electrode connection, the 3rd resistor R3 other end negative electrode with the first diode D1, the 4th electric capacity C4 respectively
One end connected with the first triode Q1 base stage, the first diode D1 the anode negative electrode with the second diode D2, respectively
The four electric capacity C4 other end, the 5th electric capacity C5 one end connect with a variable inductance L fixing end, the second diode D2 sun
The base stage of the pole other end with the 5th electric capacity C5, the 4th resistance R4 one end and the second triode Q2 respectively is connected, the two or three pole
Pipe Q2 emitter stage is connected with the first triode Q1 emitter stage and variable inductance L sliding end respectively, and the 4th resistance R4's is another
One end is connected with the second triode Q2 colelctor electrode, and variable inductance L another fixing end is just defeated by the 5th resistance R5 connections
Go out to hold VOUT+.
In the present embodiment, first resistor R1 and second resistance R2 are current-limiting resistance, and first resistor R1 is used for positive input
The branch road between VIN+ and the second electric capacity C2 is held to carry out overcurrent protection, second resistance R2 is used for the electricity of negative input end VIN- and the 3rd
The branch road held between C3 carries out overcurrent protection.First electric capacity C1 is filter capacitor, for filtering out high frequency spurs so that the power supply
The operation of power supply 1 is more stable.The utility model disclosure satisfy that rail site environment requirement, safety and reliability compared with
It is high.
It is noted that in the present embodiment, the first triode Q1 is NPN type triode, and the second triode Q2 is positive-negative-positive
Triode.Certainly, in other cases of the present embodiment, the first triode Q1 can be PNP type triode, the two or three pole
Pipe Q2 can be NPN type triode, but at this moment the structure of circuit also will accordingly change.
In the present embodiment, power supply 1 also includes the 6th electric capacity C6, and the second triode Q2 emitter stage passes through the 6th electric capacity
C6 connections are connected with variable inductance L sliding end.6th electric capacity C6 is coupled capacitor, for preventing the second triode Q2 and inductance
Interference between L, to further enhance the security performance of circuit.
In the present embodiment, the power supply 1 also includes the 6th resistance R6, and the 6th resistance R6 one end is with the 3rd electric capacity C3's
The other end is connected, and the 6th resistance R6 other end is connected with the second triode Q2 colelctor electrode.6th resistance R6 is current-limiting resistance,
For carrying out overcurrent protection to the branch road between the first electric capacity C1 and the second triode Q2 colelctor electrode, further to strengthen electricity
The security performance on road.
In the present embodiment, the power supply 1 also includes the 7th resistance R7, and the 7th resistance R7 one end is with the second electric capacity C2's
The other end connects, the 7th resistance R7 other end connection negative output terminal VOUT-.7th resistance R7 is current-limiting resistance, for negative
Branch road where output end VOUT- carries out overcurrent protection.
In the present embodiment, the power supply 1 also includes the 8th resistance R8, and the 6th resistance R6 other end passes through the 8th resistance
R8 is connected with the second triode Q2 colelctor electrode.8th resistance R8 is current-limiting resistance, for the colelctor electrode to the second triode Q2
The branch road at place carries out overcurrent protection.
In a word, the utility model uses Hall effect, and the low current in rail broken rail monitoring system is gathered in real time,
The current signal of collection is digitized using dsp chip 3, and rail state is identified according to mathematical modeling, and is led to
Cross RS485 buses to be transmitted, the utility model has the characteristic such as waterproof, against shock, sun-proof, disclosure satisfy that rail site environment
Requirement.Simultaneously because power supply 1 is provided with current-limiting resistance and filter capacitor, therefore its safety and reliability is higher.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc., the utility model should be included in
Protection domain within.
Claims (6)
1. a kind of rail broken rail monitoring small electric current sensor, it is characterised in that including power supply, current sampling circuit, DSP
Chip and signal receiving end, the power supply and current sampling circuit are connected with high-pressure side winding, the current sample electricity
Road is gathered in real time to the low current in rail broken rail monitoring system, and the current signal of collection is sent into the DSP cores
Piece, the current signal is converted to data signal by the dsp chip, and the data signal is sent by RS485 buses
To the signal receiving end, the power supply is connected with the current sampling circuit and signal receiving end, for providing respectively
Working power；
The power supply includes the first triode, the second triode, first resistor, second resistance, 3rd resistor, the 4th electricity
Resistance, the 5th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the first diode, the two or two pole
Pipe and variable inductance, one end connection positive input terminal of the first resistor, one end connection negative input end of the second resistance, institute
State the other end of first resistor one end with first electric capacity, one end of the second electric capacity, one end of 3rd resistor and respectively
The colelctor electrode connection of one triode, the other end of second electric capacity connect with one end of the 3rd electric capacity and negative output terminal respectively
Connect, the other end of the 3rd electric capacity other end with first electric capacity, the other end of second resistance and the two or three pole respectively
The colelctor electrode connection of pipe, one end of the other end of the 3rd resistor negative electrode with first diode, the 4th electric capacity respectively
Connected with the base stage of the first triode, the anode of first diode negative electrode with second diode, the 4th electricity respectively
The other end of appearance, one end of the 5th electric capacity connect with a fixing end of variable inductance, the anode difference of second diode
It is connected with the other end, one end of the 4th resistance and the base stage of the second triode of the 5th electric capacity, second triode
Emitter stage is connected with the emitter stage of first triode and the sliding end of variable inductance respectively, the other end of the 4th resistance
It is connected with the colelctor electrode of second triode, another fixing end of the variable inductance is connected just by the 5th resistance
Output end.
2. rail broken rail monitoring small electric current sensor according to claim 1, it is characterised in that the power supply is also
Including the 6th electric capacity, the emitter stage of second triode passes through the 6th capacitance connection and the sliding end of the variable inductance
Connection.
3. rail broken rail monitoring small electric current sensor according to claim 2, it is characterised in that the power supply is also
Including the 6th resistance, one end of the 6th resistance is connected with the other end of the 3rd electric capacity, the 6th resistance it is another
End is connected with the colelctor electrode of second triode.
4. the rail broken rail monitoring small electric current sensor according to claims 1 to 3 any one, it is characterised in that institute
Stating power supply also includes the 7th resistance, and one end of the 7th resistance is connected with the other end of second electric capacity, and described
The other end of seven resistance connects the negative output terminal.
5. rail broken rail monitoring small electric current sensor according to claim 3, it is characterised in that the power supply is also
Including the 8th resistance, the other end of the 6th resistance is connected by the colelctor electrode of the 8th resistance and second triode
Connect.
6. the rail broken rail monitoring small electric current sensor according to claims 1 to 3 any one, it is characterised in that institute
It is NPN type triode to state the first triode, and second triode is PNP type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720174096.2U CN206634013U (en) | 2017-02-24 | 2017-02-24 | Rail broken rail monitoring small electric current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720174096.2U CN206634013U (en) | 2017-02-24 | 2017-02-24 | Rail broken rail monitoring small electric current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206634013U true CN206634013U (en) | 2017-11-14 |
Family
ID=60252680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720174096.2U Active CN206634013U (en) | 2017-02-24 | 2017-02-24 | Rail broken rail monitoring small electric current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206634013U (en) |
-
2017
- 2017-02-24 CN CN201720174096.2U patent/CN206634013U/en active Active
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