CN208297605U - A kind of leakage current mobile phone remote device - Google Patents
A kind of leakage current mobile phone remote device Download PDFInfo
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- CN208297605U CN208297605U CN201821045645.7U CN201821045645U CN208297605U CN 208297605 U CN208297605 U CN 208297605U CN 201821045645 U CN201821045645 U CN 201821045645U CN 208297605 U CN208297605 U CN 208297605U
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Abstract
The utility model discloses a kind of leakage current mobile phone remote devices, it is mounted on the earth current end of the iron core of transformer, including bleeder circuit, scaling circuit, low-pass filter circuit, analog-to-digital conversion module, wireless communication module and micro-chip processor, the earth current end of the iron core of the input terminal and transformer of bleeder circuit is electrically connected；Bleeder circuit provides input voltage drop for scaling circuit；The output end of scaling circuit is electrically connected with the input terminal of low-pass filter circuit；The output end of low-pass filter circuit is electrically connected with the input terminal of analog-to-digital conversion module；The output end of analog-to-digital conversion module is electrically connected with the input terminal of micro-chip processor；First output end of micro-chip processor is electrically connected with the input terminal of wireless communication module.The utility model effectively realizes detection and protection to main transformer；And since operational amplifier, analog-to-digital conversion module, micro-chip processor are all using unified power supply, relevant transforming circuit is eliminated, the structure of device is simpler, and volume is smaller.
Description
Technical field
The utility model relates to transformer detection fields, more particularly, to a kind of leakage current mobile phone remote device.
Background technique
Main transformer is one of most important power equipment, is directly related to the normal conversion and transmission of electric energy, main transformer
Depressor is mainly made of iron core and winding etc..And main transformer common one of failure when iron core failure.Multipoint earthing of iron core makes iron core
Closed circuit is formed between earth mat and generates circulation, causes iron core partly or wholly to overheat, iron core locally or globally overheats meeting
Accelerate insulating materials aging and insulation oil decomposition, declines so as to cause iron core integral insulation performance and mechanical performance, influence transformation
The safe and stable operation of device.The more serious ground connection band iron fusing that may make main transformer burns out iron core, causes iron core current potential outstanding
It is floating, it generates electric discharge phenomena and damages transformer.The most direct phenomenon of multipoint earthing of iron core is exactly that iron core grounding current becomes larger.
Utility model content
The utility model overcomes the defect of existing main transformer detection, provides a kind of new leakage current mobile phone remote
Device.The utility model is by carrying out sampling point to the earth current of main transformer using bleeder circuit and scaling circuit
Analysis, effectively realizes the detection and protection to main transformer.
In order to solve the above technical problems, the technical solution of the utility model is as follows:
A kind of leakage current mobile phone remote device, is mounted on the earth current end of the iron core of transformer, including bleeder circuit,
Scaling circuit, low-pass filter circuit, analog-to-digital conversion module, wireless communication module and micro-chip processor, wherein
The earth current end of the iron core of the input terminal and transformer of the bleeder circuit is electrically connected；
The bleeder circuit provides input voltage drop for scaling circuit；
The output end of the scaling circuit is electrically connected with the input terminal of low-pass filter circuit；
The output end of the low-pass filter circuit is electrically connected with the input terminal of analog-to-digital conversion module；
The output end of the analog-to-digital conversion module is electrically connected with the input terminal of micro-chip processor；
First output end of the micro-chip processor is electrically connected with the input terminal of wireless communication module.
Utility model works process is as follows:
It is divided by earth current of the bleeder circuit to the iron core of transformer, is then carried out by scaling circuit
Further partial pressure, is filtered using low-pass filter circuit.Last obtained filtering signal is transmitted to micro-chip processor.
Micro-chip processor carries out linear transformation according to filtering signal, obtains the numerical value of the earth current of the iron core about transformer, and right
The iron core of transformer is judged.Meanwhile module sends the numerical value of the earth current of the iron core of transformer by wireless communication
Afield on the handheld terminal of staff.
In a preferred solution, the low-pass filter circuit include first resistor, second resistance, 3rd resistor,
4th resistance, first diode, the second diode, first capacitor, the first operational amplifier, wherein
Input terminal of the one end of the second resistance as low-pass filter circuit, the other end of second resistance and the first fortune
Calculate the non-inverting input terminal electrical connection of amplifier；
The reverse inter-input-ing ending grounding of first operational amplifier；
The other end of the second resistance is electrically connected with one end of 3rd resistor；
The other end of the second resistance is electrically connected with one end of first resistor；
The other end of the first resistor is electrically connected with the output end of the first operational amplifier；
The other end of the 3rd resistor is electrically connected with the anode of first diode；
The other end of the 3rd resistor is electrically connected with the cathode of the second diode；
The cathode of the first diode is electrically connected with the anode of the second diode；
The other end of the 3rd resistor is electrically connected with one end of the 4th resistance；
The other end of 4th resistance is grounded；
The other end of 4th resistance is electrically connected with the anode of the second diode；
The other end of the 3rd resistor is electrically connected with one end of first capacitor；
The other end of the first capacitor is electrically connected with the output end of the first operational amplifier, the first operational amplifier
Output end of the output end as low-pass filter circuit.
Originally have in preferred embodiment, low-pass filter circuit effectively eliminates high frequency spurs to the unfavorable of power storage and transmission
It influences, has the advantages that precision is high, at low cost.
In a preferred solution, the resistance value of the first resistor, second resistance and 3rd resistor is all equal
's.
In a preferred solution, the first diode is identical with the parameter of the second diode.
In a preferred solution, the bleeder circuit includes the 5th resistance and the 6th resistance, the ratio fortune
Calculating circuit includes second operational amplifier, the 7th resistance, the 8th resistance, the 9th resistance and the tenth resistance, wherein
Input terminal of the one end of 5th resistance as bleeder circuit, one end of the 5th resistance and the one of the 7th resistance
End electrical connection；
The other end of 5th resistance is electrically connected with one end of the 7th resistance；
The other end of 6th resistance is grounded；
The other end of 7th resistance is electrically connected with the non-inverting input terminal of second operational amplifier；
The other end of 5th resistance is electrically connected with one end of the 8th resistance；
The other end of 8th resistance is electrically connected with the inverting input terminal of second operational amplifier；
The other end of 7th resistance is electrically connected with one end of the 9th resistance；
The other end of 9th resistance is grounded；
The other end of 8th resistance is electrically connected with one end of the tenth resistance；
The other end of tenth resistance is electrically connected with the output end of second operational amplifier, second operational amplifier
Output end of the output end as scaling circuit.
In a preferred solution, the resistance value of the 7th resistance is equal to the resistance value of the 9th resistance.
In a preferred solution, the second operational amplifier is ADA4096.
In this preferred embodiment, ADA4096 is rail-to-rail amplifier, has input over-voltage protecting function, for being higher or lower than
Range within the voltage 32V of power rail, will not occur reverse phase or latch.When open circuit or other problems suddenly occur for collection terminal
When causing collection voltages excessive, overvoltage protection can be carried out to test device.
In a preferred solution, the leakage current mobile phone remote device further includes data storage, described
The input terminal of data storage is electrically connected with the second output terminal of micro-chip processor.
In this preferred embodiment, data storage is used to store the numerical value of the earth current of the iron core of transformer.
In a preferred solution, the leakage current mobile phone remote device further includes the first zener diode and
Two zener diodes, wherein
The anode of first zener diode is electrically connected with the output end of low-pass filter circuit；
The cathode of first zener diode connects power supply；
The cathode of second zener diode is electrically connected with the output end of low-pass filter circuit；
The plus earth of second zener diode.
In this preferred embodiment, the first zener diode and the second zener diode provide the effect of pressure stabilizing.
In a preferred solution, the analog-to-digital conversion module is AD7920.
In a preferred solution, operational amplifier, analog-to-digital conversion module, micro-chip processor all use identical electricity
Source.
Compared with prior art, the beneficial effect of technical solutions of the utility model is:
The utility model is by sampling the earth current of main transformer using bleeder circuit and scaling circuit
Analysis, effectively realizes the detection and protection to main transformer；And due to operational amplifier, analog-to-digital conversion module, micro process
Chip all using unified power supply, eliminates relevant transforming circuit, the structure of device is simpler, and volume is smaller.
Detailed description of the invention
Fig. 1 is the module map of embodiment.
Fig. 2 is the low-pass filter circuit figure of embodiment.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
In order to better illustrate this embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent actual product
Size；
To those skilled in the art, it is to be understood that certain known features and its explanation, which may be omitted, in attached drawing
's.
The technical solution of the utility model is described further with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of leakage current mobile phone remote device, is mounted on the earth current end of the iron core of transformer, packet
Include bleeder circuit, scaling circuit, low-pass filter circuit, AD7920, the first zener diode, the second zener diode, 2G
Communication module, MSP430F149 and TF card, wherein
The earth current end of the iron core of the input terminal and transformer of bleeder circuit is electrically connected；
Bleeder circuit provides input voltage drop for scaling circuit；
The output end of scaling circuit is electrically connected with the input terminal of low-pass filter circuit；
The output end of low-pass filter circuit is electrically connected with the input terminal of AD7920；
The anode of first zener diode is electrically connected with the output end of low-pass filter circuit；
The cathode of first zener diode connects 5V power supply；
The cathode of second zener diode is electrically connected with the output end of low-pass filter circuit；
The plus earth of second zener diode；
The output end of AD7920 is electrically connected with the input terminal of MSP430F149；
The first output end of MSP430F149 is electrically connected with the input terminal of TF card；
The second output terminal of MSP430F149 is electrically connected with the input terminal of 2G communication module；
Wherein, as shown in Fig. 2, low-pass filter circuit includes first resistor, second resistance, 3rd resistor, the 4th resistance,
One diode, the second diode, first capacitor, the first operational amplifier, wherein
Input terminal of the one end of second resistance as low-pass filter circuit, the other end of second resistance and the first operation amplifier
The non-inverting input terminal of device is electrically connected；
The reverse inter-input-ing ending grounding of first operational amplifier；
The other end of second resistance is electrically connected with one end of 3rd resistor；
The other end of second resistance is electrically connected with one end of first resistor；
The other end of first resistor is electrically connected with the output end of the first operational amplifier；
The other end of 3rd resistor is electrically connected with the anode of first diode；
The other end of 3rd resistor is electrically connected with the cathode of the second diode；
The cathode of first diode is electrically connected with the anode of the second diode；
The other end of 3rd resistor is electrically connected with one end of the 4th resistance；
The other end of 4th resistance is grounded；
The other end of 4th resistance is electrically connected with the anode of the second diode；
The other end of 3rd resistor is electrically connected with one end of first capacitor；
The other end of first capacitor is electrically connected with the output end of the first operational amplifier, the output end of the first operational amplifier
Output end as low-pass filter circuit；
The resistance value of first resistor, second resistance and 3rd resistor is all equal；
First diode is identical with the parameter of the second diode.
Wherein, bleeder circuit includes the 5th resistance and the 6th resistance, and scaling circuit includes second operational amplifier, the
Seven resistance, the 8th resistance, the 9th resistance and the tenth resistance, wherein
Input terminal of the one end of 5th resistance as bleeder circuit, one end of the 5th resistance and one end of the 7th resistance are electrically connected
It connects；
The other end of 5th resistance is electrically connected with one end of the 7th resistance；
The other end of 6th resistance is grounded；
The other end of 7th resistance is electrically connected with the non-inverting input terminal of ADA4096；
The other end of 5th resistance is electrically connected with one end of the 8th resistance；
The other end of 8th resistance is electrically connected with the inverting input terminal of ADA4096；
The other end of 7th resistance is electrically connected with one end of the 9th resistance；
The other end of 9th resistance is grounded；
The other end of 8th resistance is electrically connected with one end of the tenth resistance；
The other end of tenth resistance is electrically connected with the output end of ADA4096, and the output end of ADA4096 is as scale operation electricity
The output end on road；
The resistance value of 7th resistance is equal to the resistance value of the 9th resistance.
The present embodiment course of work:
It is divided by earth current of the bleeder circuit to the iron core of transformer, is then carried out by scaling circuit
Further partial pressure, is filtered using low-pass filter circuit.Last obtained filtering signal is by two pole of a pair of of pressure stabilizing
MSP430F149 is transmitted to after pipe.MSP430F149 carries out linear transformation according to filtering signal, obtains the iron core about transformer
Earth current numerical value, and the iron core of transformer is judged, and pass through 2G communication module connecing the iron core of transformer
The numerical value of earth-current is sent on the afield handheld terminal of staff, and TF card stores the number of the earth current of the iron core of transformer
Value.
The same or similar label correspond to the same or similar components；
The terms describing the positional relationship in the drawings are only for illustration, should not be understood as the limitation to this patent；
Obviously, the above embodiments of the present invention is merely examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in
Within the protection scope of the utility model claims.
Claims (10)
1. a kind of leakage current mobile phone remote device is mounted on the earth current end of the iron core of transformer, which is characterized in that including
Bleeder circuit, scaling circuit, low-pass filter circuit, analog-to-digital conversion module, wireless communication module and micro-chip processor,
In,
The earth current end of the iron core of the input terminal and transformer of the bleeder circuit is electrically connected；
The bleeder circuit provides input voltage drop for scaling circuit；
The output end of the scaling circuit is electrically connected with the input terminal of low-pass filter circuit；
The output end of the low-pass filter circuit is electrically connected with the input terminal of analog-to-digital conversion module；
The output end of the analog-to-digital conversion module is electrically connected with the input terminal of micro-chip processor；
First output end of the micro-chip processor is electrically connected with the input terminal of wireless communication module.
2. leakage current mobile phone remote device according to claim 1, which is characterized in that the low-pass filter circuit packet
Include first resistor, second resistance, 3rd resistor, the 4th resistance, first diode, the second diode, first capacitor, the first operation
Amplifier, wherein
Input terminal of the one end of the second resistance as low-pass filter circuit, the other end of second resistance are put with the first operation
The non-inverting input terminal electrical connection of big device；
The reverse inter-input-ing ending grounding of first operational amplifier；
The other end of the second resistance is electrically connected with one end of 3rd resistor；
The other end of the second resistance is electrically connected with one end of first resistor；
The other end of the first resistor is electrically connected with the output end of the first operational amplifier；
The other end of the 3rd resistor is electrically connected with the anode of first diode；
The other end of the 3rd resistor is electrically connected with the cathode of the second diode；
The cathode of the first diode is electrically connected with the anode of the second diode；
The other end of the 3rd resistor is electrically connected with one end of the 4th resistance；
The other end of 4th resistance is grounded；
The other end of 4th resistance is electrically connected with the anode of the second diode；
The other end of the 3rd resistor is electrically connected with one end of first capacitor；
The other end of the first capacitor is electrically connected with the output end of the first operational amplifier, the output of the first operational amplifier
Hold the output end as low-pass filter circuit.
3. leakage current mobile phone remote device according to claim 2, which is characterized in that the first resistor, second
The resistance value of resistance and 3rd resistor is all equal.
4. leakage current mobile phone remote device according to claim 2 or 3, which is characterized in that the first diode
It is identical with the parameter of the second diode.
5. leakage current mobile phone remote device according to claim 4, which is characterized in that the bleeder circuit includes the
Five resistance and the 6th resistance, the scaling circuit include second operational amplifier, the 7th resistance, the 8th resistance, the 9th
Resistance and the tenth resistance, wherein
Input terminal of the one end of 5th resistance as bleeder circuit, one end of the 5th resistance and one end electricity of the 7th resistance
Connection；
The other end of 5th resistance is electrically connected with one end of the 7th resistance；
The other end of 6th resistance is grounded；
The other end of 7th resistance is electrically connected with the non-inverting input terminal of second operational amplifier；
The other end of 5th resistance is electrically connected with one end of the 8th resistance；
The other end of 8th resistance is electrically connected with the inverting input terminal of second operational amplifier；
The other end of 7th resistance is electrically connected with one end of the 9th resistance；
The other end of 9th resistance is grounded；
The other end of 8th resistance is electrically connected with one end of the tenth resistance；
The other end of tenth resistance is electrically connected with the output end of second operational amplifier, the output of second operational amplifier
Hold the output end as scaling circuit.
6. leakage current mobile phone remote device according to claim 5, which is characterized in that the resistance of the 7th resistance
Value is equal to the resistance value of the 9th resistance.
7. leakage current mobile phone remote device according to claim 5 or 6, which is characterized in that second operation is put
Big device is ADA4096.
8. leakage current mobile phone remote device according to claim 7, which is characterized in that the leakage current mobile phone is remote
Range device further includes the first zener diode and the second zener diode, wherein
The anode of first zener diode is electrically connected with the output end of low-pass filter circuit；
The cathode of first zener diode connects power supply；
The cathode of second zener diode is electrically connected with the output end of low-pass filter circuit；
The plus earth of second zener diode.
9. according to claim 1, leakage current mobile phone remote device described in 2,3,5,6 or 8, which is characterized in that described lets out
Leakage current mobile phone remote device further includes data storage, and the second of the input terminal of the data storage and micro-chip processor
Output end electrical connection.
10. leakage current mobile phone remote device according to claim 9, which is characterized in that the analog-to-digital conversion module
It is AD7920.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821045645.7U CN208297605U (en) | 2018-07-03 | 2018-07-03 | A kind of leakage current mobile phone remote device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821045645.7U CN208297605U (en) | 2018-07-03 | 2018-07-03 | A kind of leakage current mobile phone remote device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208297605U true CN208297605U (en) | 2018-12-28 |
Family
ID=64700150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821045645.7U Active CN208297605U (en) | 2018-07-03 | 2018-07-03 | A kind of leakage current mobile phone remote device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208297605U (en) |
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2018
- 2018-07-03 CN CN201821045645.7U patent/CN208297605U/en active Active
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