CN204694763U - A kind of current monitoring circuit of vibro-pickup - Google Patents
A kind of current monitoring circuit of vibro-pickup Download PDFInfo
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- CN204694763U CN204694763U CN201520226516.8U CN201520226516U CN204694763U CN 204694763 U CN204694763 U CN 204694763U CN 201520226516 U CN201520226516 U CN 201520226516U CN 204694763 U CN204694763 U CN 204694763U
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Abstract
The utility model discloses a kind of current monitoring circuit of vibro-pickup, the observation circuit comprising protection circuit and be connected with protection circuit; Described observation circuit comprises sampling resistor R1, resistance R3 ~ R4, diode D1 ~ D4, electrochemical capacitor C1, electric capacity C2 ~ C5, electrochemical capacitor C6 and inductance L 1; Compared with prior art, the utility model relies on electronic switch and resistance to realize the realization protection of observation circuit, and reaction velocity is fast; By sampling resistor, current signal is sampled, current signal is become voltage signal, pass behind diode D1 ~ D4 and carry out bridge rectifier, electrochemical capacitor C3 ~ C4 carries out filtering, d. c. voltage signal is carried out voltage division processing by resistance R6, R7, finally holds from resistance R8 and takes out required voltage, test this circuit structure simple and convenient through reality, sampling efficiency is high, signal stabilization.
Description
Technical field
The utility model relates to sensing equipment manufacturing technology field, is specially a kind of current monitoring circuit of vibro-pickup.
Background technology
Vibro-pickup is the one of sensor, vibration signal is become signal that is chemical, machinery or (the most frequently used) electricity, and the transducing head that the intensity of gained signal is proportional with the vibratory output detected.By the difference of detection limit, accelerometer, speed vibro-pickup and displacement vibro-pickup etc. can be divided into several.Divide by the principle of Conversion of Energy, have again the numerous species such as quality spring, piezoelectric type, electrodynamic type, electromagnetic type.In vibration survey, most widespread use is piezoelectric accelerometer at present, because it has measure the plurality of advantages such as frequency range is wide, dynamic range is large, volume is little, lightweight, structure is simple, easy to use.In addition, accelerometer coordinates with suitable circuit network, can provide speed and the shift value of corresponding vibration.Contact and contactless and relative measurement formula and absolute measurement formula can be divided into again working method.Mostly be magnetoelectricity type pendulum-type vibro-pickup in engineering survey, conventional frequency lower limit is 0.1Hz, and the upper limit can reach 50Hz, and maximum detection displacement tens millimeters, thin tail sheep can be surveyed to 0.05 μm.
Circuital current monitoring in vibro-pickup internal circuit and protection circuit are one of keys of the reliable and stable operation of influential system.Have many separate current sensors in the market for producer in vibro-pickup, but price is relatively expensive, the remote more difficult realization of transmission, loss of signal is comparatively large, is unfavorable for the reduction of cost and promotes production on a large scale.
Utility model content
The purpose of this utility model is the current monitoring circuit providing a kind of vibro-pickup, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A current monitoring circuit for vibro-pickup, the observation circuit comprising protection circuit and be connected with protection circuit, protection circuit is connected with power supply route, comprises control circuit and a metal-oxide-semiconductor Q4, control circuit comprises triode Q1 ~ Q3 and resistance R1 ~ R7, and resistance R1 and described resistance R2 is series between power input VIN and input ground GIN, the first end of triode Q1 connects the source terminal of metal-oxide-semiconductor Q4, and the second end connects described input ground GIN, the first end of three-terminal link resistance R6, the first end of resistance R6 is connected to the 3rd end of triode Q1, and the second end is connected to the link of resistance R3 and resistance R4, the first end of triode Q2 is connected to the link of resistance R1 and resistance R2, and the second end connects power input VIN, the grid of three-terminal link metal-oxide-semiconductor Q4, 3rd end of the first end connecting triode Q2 of resistance R5, the second end connects the source electrode of metal-oxide-semiconductor Q4, resistance R7 is series between input ground GIN and the source terminal of metal-oxide-semiconductor Q4, the first end of triode Q3 is connected to the link of resistance R3 and resistance R4, the first end of triode Q2 is connected to the link of resistance R1 and resistance R2, and the second end connects power input VIN, the grid of three-terminal link metal-oxide-semiconductor Q4, 3rd end of the first end connecting triode Q2 of resistance R5, the second end connects the source electrode of metal-oxide-semiconductor Q4, resistance R7 is series between input ground GIN and the source terminal of metal-oxide-semiconductor Q4, the first end of triode Q3 is connected to the link of resistance R3 and resistance R4, and the second end connects power output end, and three-terminal link is in the link of the first resistance R1 and the second resistance R2, described observation circuit comprises sampling resistor R1, resistance R3 ~ R4, diode D1 ~ D4, electrochemical capacitor C1, electric capacity C2 ~ C5, electrochemical capacitor C6 and inductance L 1, the output terminal of protection circuit connects one end of sampling resistor R1, the negative pole of diode D1 and the positive pole of diode D2, the output ground end of protection circuit connects the other end of sampling resistor R1, the negative pole of diode D3 and the positive pole of diode D4, the negative pole of diode D2 connects the negative pole of diode D4, the positive pole of electrochemical capacitor C1, one end of electric capacity C2 and one end of resistance R2, the minus earth of electrochemical capacitor C1, the other end of electric capacity C2 connects the positive pole of diode D1, the positive pole of diode D3 and one end of resistance R3, the other end of other end contact resistance R3 of resistance R2 and one end of resistance R5, the other end of resistance R5 connects one end of electric capacity C3, the positive pole of electrochemical capacitor C4 and one end of inductance L 1, the other end of inductance L 1 connects one end of electric capacity C5, the positive pole of electrochemical capacitor C6 and signal outlet.
As the utility model further technical scheme, described metal-oxide-semiconductor Q4 is N channel-type metal-oxide-semiconductor.
As the utility model further technical scheme, the other end ground connection of described electric capacity C3, the minus earth of electrochemical capacitor C4, the other end ground connection of electric capacity C5, the minus earth of electrochemical capacitor C6.
Compared with prior art, the utility model relies on electronic switch and resistance to realize the realization protection of observation circuit, and reaction velocity is fast; By sampling resistor, current signal is sampled, current signal is become voltage signal, pass behind diode D1 ~ D4 and carry out bridge rectifier, electrochemical capacitor C3 ~ C4 carries out filtering, d. c. voltage signal is carried out voltage division processing by resistance R6, R7, finally holds from resistance R8 and takes out required voltage, test this circuit structure simple and convenient through reality, sampling efficiency is high, signal stabilization.
Accompanying drawing explanation
Fig. 1 is a kind of electrical block diagram of current monitoring circuit of vibro-pickup.
Embodiment
Be described in more detail below in conjunction with the technical scheme of embodiment to this patent.
Refer to Fig. 1, a kind of current monitoring circuit of vibro-pickup, the observation circuit comprising protection circuit and be connected with protection circuit; Protection circuit is connected with power supply route, comprises control circuit and a N channel-type metal-oxide-semiconductor Q4, and control circuit 10 controls the conducting of described metal-oxide-semiconductor and ends the connection and the disconnection that realize discharge loop; Control circuit comprises triode Q1 ~ Q3 and resistance R1 ~ R7, and resistance R1 and described resistance R2 is series between power input VIN and input ground GIN; The first end of triode Q1 connects the source terminal of metal-oxide-semiconductor Q4, and the second end connects described input ground GIN, the first end of end contact resistance R6; The first end of resistance R6 is connected to the 3rd end of triode Q1, and the second end is connected to the link of resistance R3 and resistance R4; The first end of triode Q2 is connected to the link of resistance R1 and resistance R2, and the second end connects power input VIN, and end connects the grid of metal-oxide-semiconductor Q4; The end of the first end connecting triode Q2 of resistance R5, the second end connects the source electrode of metal-oxide-semiconductor Q4; Resistance R7 is series between input ground GIN and the source terminal of metal-oxide-semiconductor Q4; The first end of triode Q3 is connected to the link of resistance R3 and resistance R4; The first end of triode Q2 is connected to the link of resistance R1 and resistance R2, and the second end connects power input VIN, the grid of three-terminal link metal-oxide-semiconductor Q4; 3rd end of the first end connecting triode Q2 of resistance R5, the second end connects the source electrode of metal-oxide-semiconductor Q4; Resistance R7 is series between input ground GIN and the source terminal of metal-oxide-semiconductor Q4; The first end of triode Q3 is connected to the link of resistance R3 and resistance R4, and the second end connects power output end, and three-terminal link is in the link of the first resistance R1 and the second resistance R2.
When power supply do not occur overcurrent under-voltage time, ensure Q2 conducting Q3 not conducting, and Q2 conducting can make Q4 conducting, thus realize the conducting of Power supply path and current supply circuit; When output current is greater than the threshold values of setting, the electric current of R7 increases, and the pressure drop on R7 increases, and makes Q1 conducting, then by the dividing potential drop of R3 and R6, the pressure drop of R3 is increased, then Q3 conducting, thus the electric current on R2 increase, the pressure drop of R1 reduces, cause Q2 not conducting, then metal-oxide-semiconductor disconnects, and makes circuit automatically cut off current supply circuit with the infringement of protection power source from overcurrent; When output voltage lower than setting threshold values time, the pressure drop on R1 is reduced, then Q2 not conducting, thus NOMS pipe disconnection, then circuit also can autotomy disconnected current supply circuit with protection power source from under-voltage infringement;
Described observation circuit comprises sampling resistor R1, resistance R3 ~ R4, diode D1 ~ D4, electrochemical capacitor C1, electric capacity C2 ~ C5, electrochemical capacitor C6 and inductance L 1, the output terminal of protection circuit connects one end of sampling resistor R1, the negative pole of diode D1 and the positive pole of diode D2, the output ground end of protection circuit connects the other end of sampling resistor R1, the negative pole of diode D3 and the positive pole of diode D4, the negative pole of diode D2 connects the negative pole of diode D4, the positive pole of electrochemical capacitor C1, one end of electric capacity C2 and one end of resistance R2, the minus earth of electrochemical capacitor C1, the other end of electric capacity C2 connects the positive pole of diode D1, the positive pole of diode D3 and one end of resistance R3, the other end of other end contact resistance R3 of resistance R2 and one end of resistance R5, the other end of resistance R5 connects one end of electric capacity C3, the positive pole of electrochemical capacitor C4 and one end of inductance L 1, the other end of inductance L 1 connects one end of electric capacity C5, the positive pole of electrochemical capacitor C6 and signal outlet, the other end ground connection of described electric capacity C3, the minus earth of electrochemical capacitor C4, the other end ground connection of electric capacity C5, the minus earth of electrochemical capacitor C6.
The utility model is sampled to current signal by sampling resistor, current signal is become voltage signal, pass behind diode D1 ~ D4 and carry out bridge rectifier, electrochemical capacitor C3 ~ C4 carries out filtering, d. c. voltage signal is carried out voltage division processing by resistance R6, R7, finally holds from resistance R8 and takes out required voltage, test this circuit structure simple and convenient through reality, sampling efficiency is high, signal stabilization.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment, in the ken that one skilled in the relevant art possesses, various change can also be made under the prerequisite not departing from this patent aim.
Claims (3)
1. a current monitoring circuit for vibro-pickup, is characterized in that, the observation circuit comprising protection circuit and be connected with protection circuit, protection circuit is connected with power supply route, comprises control circuit and a metal-oxide-semiconductor Q4, control circuit comprises triode Q1 ~ Q3 and resistance R1 ~ R7, and resistance R1 and described resistance R2 is series between power input VIN and input ground GIN, the first end of triode Q1 connects the source terminal of metal-oxide-semiconductor Q4, and the second end connects described input ground GIN, the first end of three-terminal link resistance R6, the first end of resistance R6 is connected to the 3rd end of triode Q1, and the second end is connected to the link of resistance R3 and resistance R4, the first end of triode Q2 is connected to the link of resistance R1 and resistance R2, and the second end connects power input VIN, the grid of three-terminal link metal-oxide-semiconductor Q4, 3rd end of the first end connecting triode Q2 of resistance R5, the second end connects the source electrode of metal-oxide-semiconductor Q4, resistance R7 is series between input ground GIN and the source terminal of metal-oxide-semiconductor Q4, the first end of triode Q3 is connected to the link of resistance R3 and resistance R4, the first end of triode Q2 is connected to the link of resistance R1 and resistance R2, and the second end connects power input VIN, the grid of three-terminal link metal-oxide-semiconductor Q4, 3rd end of the first end connecting triode Q2 of resistance R5, the second end connects the source electrode of metal-oxide-semiconductor Q4, resistance R7 is series between input ground GIN and the source terminal of metal-oxide-semiconductor Q4, the first end of triode Q3 is connected to the link of resistance R3 and resistance R4, and the second end connects power output end, and three-terminal link is in the link of the first resistance R1 and the second resistance R2, described observation circuit comprises sampling resistor R1, resistance R3 ~ R4, diode D1 ~ D4, electrochemical capacitor C1, electric capacity C2 ~ C5, electrochemical capacitor C6 and inductance L 1, the output terminal of protection circuit connects one end of sampling resistor R1, the negative pole of diode D1 and the positive pole of diode D2, the output ground end of protection circuit connects the other end of sampling resistor R1, the negative pole of diode D3 and the positive pole of diode D4, the negative pole of diode D2 connects the negative pole of diode D4, the positive pole of electrochemical capacitor C1, one end of electric capacity C2 and one end of resistance R2, the minus earth of electrochemical capacitor C1, the other end of electric capacity C2 connects the positive pole of diode D1, the positive pole of diode D3 and one end of resistance R3, the other end of other end contact resistance R3 of resistance R2 and one end of resistance R5, the other end of resistance R5 connects one end of electric capacity C3, the positive pole of electrochemical capacitor C4 and one end of inductance L 1, the other end of inductance L 1 connects one end of electric capacity C5, the positive pole of electrochemical capacitor C6 and signal outlet.
2. the current monitoring circuit of a kind of vibro-pickup according to claim 1, is characterized in that, described metal-oxide-semiconductor Q4 is N channel-type metal-oxide-semiconductor.
3. the current monitoring circuit of a kind of vibro-pickup according to claim 1, is characterized in that, the other end ground connection of described electric capacity C3, the minus earth of electrochemical capacitor C4, the other end ground connection of electric capacity C5, the minus earth of electrochemical capacitor C6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520226516.8U CN204694763U (en) | 2015-04-15 | 2015-04-15 | A kind of current monitoring circuit of vibro-pickup |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520226516.8U CN204694763U (en) | 2015-04-15 | 2015-04-15 | A kind of current monitoring circuit of vibro-pickup |
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| CN204694763U true CN204694763U (en) | 2015-10-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132406A (en) * | 2017-05-10 | 2017-09-05 | 哈尔滨工业大学 | A kind of non-contact electric current measurement device based on giant magnetostrictive material |
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2015
- 2015-04-15 CN CN201520226516.8U patent/CN204694763U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132406A (en) * | 2017-05-10 | 2017-09-05 | 哈尔滨工业大学 | A kind of non-contact electric current measurement device based on giant magnetostrictive material |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20210415 |