CN106018897B - A kind of circuit, control method and electronic equipment for eliminating relay contact electromotive force - Google Patents
A kind of circuit, control method and electronic equipment for eliminating relay contact electromotive force Download PDFInfo
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- CN106018897B CN106018897B CN201610472177.0A CN201610472177A CN106018897B CN 106018897 B CN106018897 B CN 106018897B CN 201610472177 A CN201610472177 A CN 201610472177A CN 106018897 B CN106018897 B CN 106018897B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
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- General Physics & Mathematics (AREA)
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Abstract
This application provides a kind of circuits for eliminating relay contact electromotive force, which includes capacitor and dpdt relay；The dpdt relay includes the first moving contact, the second moving contact, the first fixed contact, the second fixed contact, third fixed contact, the 4th fixed contact；When needing input direct-current signal or simultaneously input direct-current signal and AC signal, first moving contact is connect with the first fixed contact, second moving contact is connect with third fixed contact, and since two groups of contact reversings are connected, the thermo-electromotive force generated is cancelled out each other.When only needing input exchange signal, first moving contact is connect with the second fixed contact, and second moving contact is connect with the 4th fixed contact.The thermo-electromotive force that contact generates cannot be transmitted to output end by Capacitor apart, to avoid influence of the thermo-electromotive force to input signal.
Description
Technical field
The present invention relates to relay fields, more specifically, being related to a kind of circuit of elimination relay contact electromotive force, control
Method processed and electronic equipment.
Background technique
Electronic metering equipment such as oscillograph, when measuring, it is sometimes necessary to by direct current and radio-frequency component
It all inputs, it is sometimes necessary to the flip-flop in signal be removed, alternating component is only taken.At this point, the amplitude range of input signal
Larger, from millivolt to upper kilovolt, and frequency is likely to be breached several hundred megahertzs, it usually needs use mechanical relay, but machine
Tool relay coil when being attracted is energized heating, and relay contact generates thermo-electromotive force, and superposition among signals, influences equipment
Measurement accuracy.Therefore, a kind of method for being able to use mechanical relay and solving the thermo-electromotive force generated is needed.
Summary of the invention
In view of this, the present invention provides a kind of circuit, control method and electronic equipment for eliminating relay contact electromotive force,
To solve the problems, such as the thermo-electromotive force generated using standard machinery relay.
In order to solve the above technical problems, present invention employs following technical solutions:
A kind of circuit for eliminating relay contact electromotive force, the circuit include:
Capacitor and dpdt relay；The dpdt relay include the first moving contact, the second moving contact,
First fixed contact, the second fixed contact, third fixed contact, the 4th fixed contact；
As input terminal, the other end of first moving contact is solid with described first for one end of first moving contact
Fixed contact or second fixed contact connection, one end of second moving contact and the third fixed contact or described
The connection of 4th fixed contact, first fixed contact are connect with the third fixed contact, second fixed contact and institute
One end connection of capacitor is stated, the other end of the capacitor is output end, the other end of second moving contact and the output
End connection.
Preferably, the circuit further include: resistance；
One end of the resistance is connect with the input terminal, and the other end of the resistance and second fixed contact connect
It connects.
A kind of control method for eliminating relay contact electromotive force, the electricity of relay contact electromotive force is eliminated applied to control
Road, the circuit include:
Capacitor and dpdt relay；The dpdt relay include the first moving contact, the second moving contact,
First fixed contact, the second fixed contact, third fixed contact, the 4th fixed contact；
As input terminal, the other end of first moving contact is solid with described first for one end of first moving contact
Fixed contact or second fixed contact connection, one end of second moving contact and the third fixed contact or described
The connection of 4th fixed contact, first fixed contact are connect with the third fixed contact, second fixed contact and institute
One end connection of capacitor is stated, the other end of the capacitor is output end, the other end of second moving contact and the output
End connection；
The described method includes:
When needing input direct-current signal or simultaneously input direct-current signal and AC signal, the first moving contact and first
Fixed contact connection, the second moving contact are connect with third fixed contact；
When only needing input exchange signal, first moving contact is connect with the second fixed contact, and described second can
Movable contact is connect with the 4th fixed contact.
Preferably, the circuit further include: resistance；
One end of the resistance is connect with the input terminal, and the other end of the resistance and second fixed contact connect
It connects.
A kind of electronic equipment, the electronic equipment include: the circuit for eliminating relay contact electromotive force；
The circuit includes capacitor and dpdt relay；The dpdt relay include the first moving contact,
Second moving contact, the first fixed contact, the second fixed contact, third fixed contact, the 4th fixed contact；
As input terminal, the other end of first moving contact is solid with described first for one end of first moving contact
Fixed contact or second fixed contact connection, one end of second moving contact and the third fixed contact or described
The connection of 4th fixed contact, first fixed contact are connect with the third fixed contact, second fixed contact and institute
One end connection of capacitor is stated, the other end of the capacitor is output end, the other end of second moving contact and the output
End connection.
Preferably, the circuit further include: resistance；
One end of the resistance is connect with the input terminal, and the other end of the resistance and second fixed contact connect
It connects.
Preferably, the electronic equipment is recorder.
Preferably, the electronic equipment is power analyzer.
Preferably, the electronic equipment is oscillograph.
Compared to the prior art, the invention has the following advantages:
The present invention provides a kind of circuit for eliminating relay contact electromotive force, the circuit include capacitor and double-pole double throw after
Electric appliance；The dpdt relay includes the first moving contact, the second moving contact, the first fixed contact, the second fixed touching
Point, third fixed contact, the 4th fixed contact；One end of first moving contact is as input terminal, the described first movable touching
The other end of point is connect with first fixed contact or second fixed contact, one end of second moving contact and institute
Third fixed contact or the 4th fixed contact connection are stated, first fixed contact and the third fixed contact connect
It connects, second fixed contact is connect with one end of the capacitor, and the other end of the capacitor is output end, and described second is movable
The other end of contact is connect with the output end.When needing input direct-current signal or simultaneously input direct-current signal and AC signal
When, the first moving contact is connect with the first fixed contact, and the second moving contact is connect with third fixed contact, due to two groups of contacts
Differential concatenation, therefore the thermo-electromotive force generated is cancelled out each other.When only needing input exchange signal, first moving contact with
The connection of second fixed contact, second moving contact are connect with the 4th fixed contact.The thermo-electromotive force that contact generates is by capacitor
Isolation cannot be transmitted to output end, to avoid influence of the thermo-electromotive force to input signal.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the electrical block diagram that the embodiment of the present invention one provides；
Fig. 2 is electrical block diagram provided by Embodiment 2 of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of circuits for eliminating relay contact electromotive force, referring to Fig.1.The circuit includes:
Capacitor C and dpdt relay RL；The dpdt relay RL includes the first moving contact 1, second can
Movable contact 4, the first fixed contact 2, the second fixed contact 3, third fixed contact 5, the 4th fixed contact 6；
One end of first moving contact 1 is as input terminal, the other end of first moving contact 1 and described first
Fixed contact 2 or second fixed contact 3 connection, one end of second moving contact 4 and the third fixed contact 5 or
The connection of 4th fixed contact 6 described in person, first fixed contact 2 are connect with the third fixed contact 5, and described second is fixed
Contact 3 is connect with one end of the capacitor C, and the other end of the capacitor C is output end, second moving contact 4 it is another
End is connect with the output end.
The circuit provided through this embodiment, when need input direct-current signal or simultaneously input direct-current signal with exchange letter
Number when, the first moving contact 1 is connect with the first fixed contact 2, and the second moving contact 4 is connect with third fixed contact 5, due to two
Group contact reversing series connection, therefore the thermo-electromotive force generated is cancelled out each other.When only needing input exchange signal, described first is movable
Contact 1 is connect with the second fixed contact 3, and second moving contact 4 is connect with the 4th fixed contact 6.The thermoelectricity that contact generates
Kinetic potential cannot be transmitted to output end by Capacitor apart, to avoid influence of the thermo-electromotive force to input signal.
Optionally, in another embodiment provided by the invention, the circuit further includes resistance R, referring to Fig. 2.
One end of the resistance R is connect with the input terminal, the other end of the resistance R and second fixed contact 3
Connection.
In the present embodiment, by the way that resistance R is arranged, charge and discharge speed when dpdt relay RL contact change-over can be slowed down
Rate reduces the impact to contact.
Another embodiment of the present invention provides a kind of control methods for eliminating relay contact electromotive force, which is characterized in that
The circuit of relay contact electromotive force is eliminated applied to control, the circuit includes:
Capacitor C and dpdt relay RL；The dpdt relay RL includes the first moving contact 1, second can
Movable contact 4, the first fixed contact 2, the second fixed contact 3, third fixed contact 5, the 4th fixed contact 6；
One end of first moving contact 1 is as input terminal, the other end of first moving contact 1 and described first
Fixed contact 2 or second fixed contact 3 connection, one end of second moving contact 4 and the third fixed contact 5 or
The connection of 4th fixed contact 6 described in person, first fixed contact 2 are connect with the third fixed contact 5, and described second is fixed
Contact 3 is connect with one end of the capacitor C, and the other end of the capacitor C is output end, second moving contact 4 it is another
End is connect with the output end；
The described method includes:
When needing input direct-current signal or simultaneously input direct-current signal and AC signal, the first moving contact 1 and
The connection of one fixed contact 2, the second moving contact 4 are connect with third fixed contact 5；
When only needing input exchange signal, first moving contact 1 is connect with the second fixed contact 3, and described second
Moving contact 4 is connect with the 4th fixed contact 6.
The method provided through this embodiment, when need input direct-current signal or simultaneously input direct-current signal with exchange letter
Number when, the first moving contact 1 is connect with the first fixed contact 2, and the second moving contact 4 is connect with third fixed contact 5, due to two
Group contact reversing series connection, therefore the thermo-electromotive force generated is cancelled out each other.When only needing input exchange signal, described first is movable
Contact 1 is connect with the second fixed contact 3, and second moving contact 4 is connect with the 4th fixed contact 6.The thermoelectricity that contact generates
Kinetic potential cannot be transmitted to output end by Capacitor apart, to avoid influence of the thermo-electromotive force to input signal.
Optionally, in another embodiment of the present invention, the circuit further includes resistance R.
One end of the resistance R is connect with the input terminal, the other end of the resistance R and second fixed contact 3
Connection.
In the present embodiment, by the way that resistance R is arranged, charge and discharge speed when dpdt relay RL contact change-over can be slowed down
Rate reduces the impact to contact.
Another embodiment of the present invention provides a kind of electronic equipment, the electronic equipment includes: to eliminate relay contact electricity
The circuit 11 of kinetic potential；
The circuit 11 includes capacitor C and dpdt relay RL；The dpdt relay RL can including first
Movable contact 1, the second moving contact 4, the first fixed contact 2, the second fixed contact 3, third fixed contact 5, the 4th fixed contact
6；
One end of first moving contact 1 is as input terminal, the other end of first moving contact 1 and described first
Fixed contact 2 or second fixed contact 3 connection, one end of second moving contact 4 and the third fixed contact 5 or
The connection of 4th fixed contact 6 described in person, first fixed contact 2 are connect with the third fixed contact 5, and described second is fixed
Contact 3 is connect with one end of the capacitor C, and the other end of the capacitor C is output end, second moving contact 4 it is another
End is connect with the output end.
The electronic equipment provided through this embodiment, when needing input direct-current signal or simultaneously input direct-current signal and friendship
When flowing signal, the first moving contact 1 is connect with the first fixed contact 2, and the second moving contact 4 is connect with third fixed contact 5, by
It connects in two groups of contact reversings, therefore the thermo-electromotive force generated is cancelled out each other.When only needing input exchange signal, described first
Moving contact 1 is connect with the second fixed contact 3, and second moving contact 4 is connect with the 4th fixed contact 6.What contact generated
Thermo-electromotive force cannot be transmitted to output end by Capacitor apart, to avoid influence of the thermo-electromotive force to input signal.
Optionally, in another embodiment provided by the invention, the electronic equipment is recorder.
Optionally, in another embodiment provided by the invention, the electronic equipment is power analyzer.
Optionally, in another embodiment provided by the invention, the electronic equipment is oscillograph.
Wherein, the inside of electronic equipment, and its output end is arranged in the circuit 11 for eliminating relay contact electromotive force
Different signal conditioning circuits can be connected according to actual needs.
Optionally, in another embodiment provided by the invention, the circuit further includes resistance R.
One end of the resistance R is connect with the input terminal, the other end of the resistance R and second fixed contact 3
Connection.
In the present embodiment, by the way that resistance R is arranged, charge and discharge speed when dpdt relay RL contact change-over can be slowed down
Rate reduces the impact to contact.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (9)
1. a kind of circuit for eliminating relay contact electromotive force, which is characterized in that the circuit includes:
Capacitor and dpdt relay；The dpdt relay includes the first moving contact, the second moving contact, first
Fixed contact, the second fixed contact, third fixed contact, the 4th fixed contact；
One end of first moving contact is as input terminal, the other end of first moving contact and the first fixed touching
Point or second fixed contact connection, one end of second moving contact and the third fixed contact or the described 4th
Fixed contact connection, first fixed contact are connect with the third fixed contact, second fixed contact and the electricity
One end of appearance connects, and the other end of the capacitor is output end, and the other end and the output end of second moving contact connect
It connects.
2. circuit according to claim 1, which is characterized in that the circuit further include: resistance；
One end of the resistance is connect with the input terminal, and the other end of the resistance is connect with second fixed contact.
3. a kind of control method for eliminating relay contact electromotive force, which is characterized in that be applied to control and eliminate relay contact
The circuit of electromotive force, the circuit include:
Capacitor and dpdt relay；The dpdt relay includes the first moving contact, the second moving contact, first
Fixed contact, the second fixed contact, third fixed contact, the 4th fixed contact；
One end of first moving contact is as input terminal, the other end of first moving contact and the first fixed touching
Point or second fixed contact connection, one end of second moving contact and the third fixed contact or the described 4th
Fixed contact connection, first fixed contact are connect with the third fixed contact, second fixed contact and the electricity
One end of appearance connects, and the other end of the capacitor is output end, and the other end and the output end of second moving contact connect
It connects；
The described method includes:
When needing input direct-current signal or simultaneously input direct-current signal and AC signal, the first moving contact and first is fixed
Contact connection, the second moving contact are connect with third fixed contact；
When only needing input exchange signal, first moving contact is connect with the second fixed contact, the described second movable touching
Point is connect with the 4th fixed contact.
4. according to the method described in claim 3, it is characterized in that, the circuit further include: resistance；
One end of the resistance is connect with the input terminal, and the other end of the resistance is connect with second fixed contact.
5. a kind of electronic equipment, which is characterized in that the electronic equipment includes: the circuit for eliminating relay contact electromotive force；
The circuit includes capacitor and dpdt relay；The dpdt relay includes the first moving contact, second
Moving contact, the first fixed contact, the second fixed contact, third fixed contact, the 4th fixed contact；
One end of first moving contact is as input terminal, the other end of first moving contact and the first fixed touching
Point or second fixed contact connection, one end of second moving contact and the third fixed contact or the described 4th
Fixed contact connection, first fixed contact are connect with the third fixed contact, second fixed contact and the electricity
One end of appearance connects, and the other end of the capacitor is output end, and the other end and the output end of second moving contact connect
It connects.
6. electronic equipment according to claim 5, which is characterized in that the circuit further include: resistance；
One end of the resistance is connect with the input terminal, and the other end of the resistance is connect with second fixed contact.
7. electronic equipment according to claim 5, which is characterized in that the electronic equipment is recorder.
8. electronic equipment according to claim 5, which is characterized in that the electronic equipment is power analyzer.
9. electronic equipment according to claim 5, which is characterized in that the electronic equipment is oscillograph.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610472177.0A CN106018897B (en) | 2016-06-22 | 2016-06-22 | A kind of circuit, control method and electronic equipment for eliminating relay contact electromotive force |
| PCT/CN2017/076384 WO2017219707A1 (en) | 2016-06-22 | 2017-03-13 | Circuit for eliminating electromotive force of contacts of relay, control method, and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610472177.0A CN106018897B (en) | 2016-06-22 | 2016-06-22 | A kind of circuit, control method and electronic equipment for eliminating relay contact electromotive force |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106018897A CN106018897A (en) | 2016-10-12 |
| CN106018897B true CN106018897B (en) | 2019-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610472177.0A Active CN106018897B (en) | 2016-06-22 | 2016-06-22 | A kind of circuit, control method and electronic equipment for eliminating relay contact electromotive force |
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| CN (1) | CN106018897B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017219707A1 (en) * | 2016-06-22 | 2017-12-28 | 广州致远电子股份有限公司 | Circuit for eliminating electromotive force of contacts of relay, control method, and electronic device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8129867B2 (en) * | 2008-06-27 | 2012-03-06 | National Instruments Corporation | RF AC/DC coupling circuit using general purpose solid-state relay |
| CN102053172B (en) * | 2009-11-10 | 2012-11-14 | 北京普源精电科技有限公司 | High-resistance broadband attenuation circuit and oscilloscope using same |
| CN101873458B (en) * | 2010-01-08 | 2012-02-15 | 杭州海康威视数字技术股份有限公司 | Video loop-through circuit of digital video recorder and digital video recorder |
| CN101980469B (en) * | 2010-09-09 | 2013-06-05 | 西北工业大学 | Protective relay coupling network for composite signal transmission |
| CN205786743U (en) * | 2016-06-22 | 2016-12-07 | 广州致远电子股份有限公司 | A kind of circuit eliminating relay contact electromotive force and electronic equipment |
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2016
- 2016-06-22 CN CN201610472177.0A patent/CN106018897B/en active Active
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| Publication number | Publication date |
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| CN106018897A (en) | 2016-10-12 |
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Address after: 510000 room 517, Gao Pu Road, Tianhe Software Park, Tianhe District, Guangzhou, Guangdong, China, 1023 Patentee after: GUANGZHOU ZHIYUAN ELECTRONICS Co.,Ltd. Address before: 510000 Guangdong city of Guangzhou province Tianhe District No. 1035 Room 204 second Pu Lu Patentee before: GUANGZHOU ZHIYUAN ELECTRONICS Co.,Ltd. |
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Effective date of registration: 20220819 Address after: Room 304, 3rd Floor, No. 43, Sicheng Road, Tianhe District, Guangzhou City, Guangdong Province, 510000 Patentee after: Guangzhou Zhiyuan Instrument Co.,Ltd. Address before: 510000 room 517, 1023 Gaopu Road, Tianhe Software Park, Tianhe District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU ZHIYUAN ELECTRONICS Co.,Ltd. |