CN107256057A - A kind of sensor control circuit - Google Patents
A kind of sensor control circuit Download PDFInfo
- Publication number
- CN107256057A CN107256057A CN201710633322.3A CN201710633322A CN107256057A CN 107256057 A CN107256057 A CN 107256057A CN 201710633322 A CN201710633322 A CN 201710633322A CN 107256057 A CN107256057 A CN 107256057A
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- Prior art keywords
- circuit
- resistance
- control circuit
- diode
- voltage
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Electronic Switches (AREA)
Abstract
The present invention relates to electronic circuit technology field, specifically, it is a kind of sensor control circuit, circuit external power supply uses 24V powered by direct current, the linear voltage-stabilizing circuit that inside is constituted using LM7812 provides smart metastable 12V dc sources, the two paths of signals detected by hardware sensor to equipment（+ 1,1）It is input to afterwards in integrated operational amplifier after filtering, integrated operational amplifier can accurately adjust bias voltage to avoid amplifier chip to the influence of sensor by potentiometer.Direct connection relational of the voltage follower at potentiometer rear to insulating power supply and operating circuit; it can ensure that circuit is stable and reliable in work; it is difficult to burn sensor when supply voltage is mutated for some reason; bus-bar construction of the present invention is reasonable; sensitivity is high, and performance is stable, is combined with torque controller; so that torque controller work is more accurate, the safety of whole motor and whole circuit is protected.
Description
Technical field
It is a kind of sensor control circuit specifically the present invention relates to electronic circuit technology field.
Background technology
According to certain task, required device, it is built-up circuit to be connected with wire.Circuit is power system, control
The chief component of the electric systems such as system, communication system, computer hardware, plays the generation of electric energy and electric signal, transmission, turns
The effect such as change, control, handle and store.
Simplest circuit, is by power supply, electrical appliance（Load）, wire, switch etc. component composition.Cried during circuit turn-on
Path is done, road is called off during disconnection.Just there is electric current to pass through in only path, circuit.Circuit certain, which disconnects, to be called open circuit or opens
Road.If directly connecting without loading between power positive cathode in circuit and being called short circuit, such case never allows.Separately
There is a kind of short circuit to refer to that the two ends of some element are directly connected, now electric current is flowed through at direct connection without passing through this yuan
Part, such case is called the element short.Open circuit（Or open circuit）It is allowed, and the first short circuit never allows, because power supply
Short circuit power supply can be caused to burn out, electrical appliance short circuit can cause electrical appliance, ammeter etc. can not normal work phenomenon generation.
The content of the invention
It is an object of the invention to provide a kind of sensor control circuit so that sensor is more intelligent, in order to realize
This purpose, the technical scheme of present disclosure is as follows：
A kind of sensor control circuit, including mu balanced circuit, control circuit and detection circuit, mu balanced circuit include a diode
D1, two fixed capacity C1 and C2, two electrochemical capacitor C7 and C8, a three terminal regulator, electric capacity C1 and electrochemical capacitor C7, electricity
Hold the AC portion in C2 and electrochemical capacitor C8 composition filtering feedback circuit elimination chip operating voltages VDD；Control circuit includes
Eight resistance are respectively R1 ~ R8, two variable resistors P1 and P2, seven fixed capacities be respectively C3, C4, C5, C6, C9, C10,
C11, an integrated operational amplifier, two two-way amplifiers and a diode D2, resistance R1, R2 and fixed capacity C9, C10
Composition filter circuit carries out paving with electric capacity C3 again and electric capacity C9 neutral grounds, resistance R3 and variable resistor P1 constitute transforming circuit
Operating voltage is provided for integrated operational amplifier, resistance R4, R5 and a two-way amplifier are passed through in integrated operational amplifier one end
Connect resistance R8 direct current outputs, electric capacity C11, C5 strobe, diode D2 plays pressure stabilization functions, resistance R6, R7 with can power transformation
Resistance P2 is connected through a two-way amplifier connection, and resistance R7 one end ground connection, detection circuit includes half-wave rectifying circuit, current limliting electricity
Road and optical coupling isolation circuit, half-wave rectifying circuit are connected 1 diode and 3 resistor coupled in parallel respectively by chip J1 two pins
Form, current-limiting circuit is formed by 2 and 2 resistor coupled in parallel, optical coupling isolation circuit is by 1 photoelectric coupling circuit, 1 electrostatic capacitance, 3
Individual resistance is formed by connecting, and electrostatic capacitance is connected to chip J2 vb- pins, and resistance is connected to chip J1 24vb pins, half-wave
Sequential competition circuit is connected and composed by NPC triodes between rectification circuit, current-limiting circuit and optical coupling isolation circuit.
Three terminal regulator model LM7812 in further improvement of the present invention, mu balanced circuit.
Further improvement of the present invention, it is voltage-regulator diode, model 1N4742 to control the diode D2 in circuit.
Two-way amplifier model LM358 in further improvement of the present invention, control circuit.
The beneficial effects of the invention are as follows：Rationally, sensitivity is high for bus-bar construction of the present invention, and performance is stable, with torque controller
It is combined so that torque controller work is more accurate, protects the safety of whole motor and whole circuit, meanwhile, with intelligence
Energyization, meets prior art development trend.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the present invention.
Embodiment
In order to deepen the understanding of the present invention, the present invention is done below in conjunction with drawings and examples and further retouched in detail
State, the embodiment is only used for explaining the present invention, protection scope of the present invention is not constituted and limited.
As shown in figure 1, a kind of sensor control circuit, including mu balanced circuit, control circuit and detection circuit, mu balanced circuit
Including a diode D1, two fixed capacity C1 and C2, two electrochemical capacitor C7 and C8, a three terminal regulators, electric capacity C1
Constituted with electrochemical capacitor C7, electric capacity C2 and electrochemical capacitor C8 in filtering feedback circuit elimination chip operating voltage VDD and exchange portion
Point；Control circuit is respectively R1 ~ R8, two variable resistors P1 and P2 including eight resistance, seven fixed capacities be respectively C3,
C4, C5, C6, C9, C10, C11, an integrated operational amplifier, two two-way amplifiers and a diode D2, resistance R1, R2
With fixed capacity C9, C10 composition filter circuit spread again with electric capacity C3 and, electric capacity C9 neutral grounds, resistance R3 with can power transformation
Resistance P1 composition transforming circuits provide operating voltage for integrated operational amplifier, and resistance R4, R5 are passed through in integrated operational amplifier one end
With a two-way amplifier connection resistance R8 direct current output, electric capacity C11, C5 strobe, and diode D2 plays pressure stabilization function, electricity
Resistance R6, R7 and variable resistor P2 are connected through a two-way amplifier connection, and resistance R7 one end ground connection, detection circuit includes half-wave
Rectification circuit, current-limiting circuit and optical coupling isolation circuit, half-wave rectifying circuit are connected 1 two pole respectively by chip J1 two pins
Pipe and 3 resistor coupled in parallel are formed, and current-limiting circuit is formed by 2 and 2 resistor coupled in parallel, and optical coupling isolation circuit is by 1 photoelectric coupling
Device, 1 electrostatic capacitance, 3 resistance are formed by connecting, and electrostatic capacitance is connected to chip J2 vb- pins, and resistance is connected to chip J1
24vb pins, sequential connected and composed by NPC triodes between half-wave rectifying circuit, current-limiting circuit and optical coupling isolation circuit competing
Strive circuit.
In the present embodiment, the three terminal regulator model LM7812 in mu balanced circuit；The diode D2 in circuit is controlled to be
Voltage-regulator diode, model 1N4742；Control the two-way amplifier model LM358 in circuit.
In the present embodiment, circuit external power supply uses 24V powered by direct current, and inside uses the linear steady of LM7812 compositions
Volt circuit provides smart metastable 12V dc sources, the two paths of signals detected by hardware sensor to equipment（+ 1, -1）Through
It is input to after crossing filtering in integrated operational amplifier, integrated operational amplifier accurately can adjust to avoid amplifier core by potentiometer
Influence of the bias voltage of piece to sensor.The voltage follower at potentiometer rear is direct to insulating power supply and operating circuit
Annexation, it is ensured that circuit is stable and reliable in work, is difficult to burn sensor when supply voltage is mutated for some reason.Integrated transporting discharging
Output signal is exported after isolating through voltage follower, for subsequent treatment link.Voltage-regulator diode 1N4742 is being passed to ensure
Sensor will not export high pressure when damaging by VOUT signal wires to be caused to burn follow-up process circuit.
General principle, principal character and the advantage of the present invention has been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, the original for simply illustrating the present invention described in above-described embodiment and specification
Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (4)
1. a kind of sensor control circuit, it is characterised in that：Including mu balanced circuit, control circuit and detection circuit, the voltage stabilizing
Circuit includes diode D1, two fixed capacity C1 and C2, two electrochemical capacitor C7 and C8, a three terminal regulators, institute
State the electric capacity C1 and electrochemical capacitor C7, the electric capacity C2 and electrochemical capacitor C8 composition filtering feedback circuits eliminate chip work
Make the AC portion in voltage VDD；The control circuit is respectively R1 ~ R8, two variable resistors P1 and P2 including eight resistance,
Seven fixed capacities are respectively C3, C4, C5, C6, C9, C10, C11, an integrated operational amplifier, two two-way amplifiers and
One diode D2, described resistance R1, R2 and fixed capacity C9, C10 composition filter circuit spread again with the electric capacity C3 and,
The electric capacity C9 neutral grounds, the resistance R3 and variable resistor P1 composition transforming circuits are the integrated operational amplifier
Operating voltage is provided, described integrated operational amplifier one end is described by described resistance R4, R5 and a two-way amplifier connection
Resistance R8 direct current outputs, described electric capacity C11, C5 strobe, and the diode D2 plays pressure stabilization function, described resistance R6, R7
A two-way amplifier is connected through with the variable resistor P2 to be connected, resistance R7 one end ground connection, the detection circuit bag
Half-wave rectifying circuit, current-limiting circuit and optical coupling isolation circuit are included, the half-wave rectifying circuit is distinguished by chip J1 two pins
Series connection 1 diode and 3 resistor coupled in parallel form, the current-limiting circuit is formed by 2 and 2 resistor coupled in parallel, the optocoupler every
It is formed by connecting from circuit by 1 photoelectric coupling circuit, 1 electrostatic capacitance, 3 resistance, the electrostatic capacitance is connected to chip J2's
Vb- pins, the resistance is connected to chip J1 24vb pins, the half-wave rectifying circuit, current-limiting circuit and light-coupled isolation electricity
Sequential competition circuit is connected and composed by NPC triodes between road.
2. sensor control circuit according to claim 1, it is characterised in that：Three terminal regulator in the mu balanced circuit
Model LM7812.
3. sensor control circuit according to claim 2, it is characterised in that：The diode D2 that controls in circuit is
Voltage-regulator diode, model 1N4742.
4. sensor control circuit according to claim 3, it is characterised in that：Two-way amplifier in the control circuit
Model LM358.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710633322.3A CN107256057A (en) | 2017-07-28 | 2017-07-28 | A kind of sensor control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710633322.3A CN107256057A (en) | 2017-07-28 | 2017-07-28 | A kind of sensor control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107256057A true CN107256057A (en) | 2017-10-17 |
Family
ID=60025450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710633322.3A Pending CN107256057A (en) | 2017-07-28 | 2017-07-28 | A kind of sensor control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107256057A (en) |
-
2017
- 2017-07-28 CN CN201710633322.3A patent/CN107256057A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171017 |