CN208537941U - A kind of circuit of MCU driving ultrasonic wave - Google Patents
A kind of circuit of MCU driving ultrasonic wave Download PDFInfo
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- CN208537941U CN208537941U CN201821026688.0U CN201821026688U CN208537941U CN 208537941 U CN208537941 U CN 208537941U CN 201821026688 U CN201821026688 U CN 201821026688U CN 208537941 U CN208537941 U CN 208537941U
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Abstract
The utility model discloses a kind of circuit of MCU driving ultrasonic wave, which includes: ultrasonic drive circuit, ultrasonic wave match circuit, ac input circuit, half-bridge circuit and reduction voltage circuit.Ultrasonic wave match circuit is connect with ultrasonic drive circuit；Ac input circuit output end one end is connect with reduction voltage circuit, and the other end is connect with half-bridge circuit；Reduction voltage circuit is connect with the ultrasonic drive circuit；Half-bridge circuit is connect with ultrasonic wave match circuit and ultrasonic drive circuit.Using technical solutions of the utility model, it is able to achieve ultrasonic frequency tracking, production cost is reduced, keeps properties of product more perfect.
Description
Technical field
The utility model relates to electronic circuit technology field more particularly to a kind of circuits of MCU driving ultrasonic wave.
Background technique
Ultrasonic measurement system is cheap, and performance hardly by light, dust, smog, electromagnetic interference and has poison gas
The influence of body, and it is easy to use, therefore purposes is very extensive.And driving the circuit of ultrasonic wave is entire ultrasound measurement system
Basis, the prior art generally use dedicated power supply chip output two-way complementation PWM square-wave signal to drive ultrasonic circuit, and
Single-chip microcontroller is for showing, timing, and time is up, and control relay disconnects AC power supplies.
But dedicated power supply chip price is high, also wants the component of many peripheries, occupies PCB space, and can not achieve
The frequency-tracking of ultrasonic wave；Single-chip microcontroller cannot directly control the state of power tube, all be that AC power supplies realization is controlled with relay
Switching on and shutting down, to indirectly control power tube.Such complex circuit designs, and cost is excessively high.
Summary of the invention
Technical problem to be solved by the utility model is to provide a kind of circuits of MCU driving ultrasonic wave, pass through list
Piece machine controls the frequency of PWM square wave, realizes frequency-tracking, and allow single-chip microcontroller and power tube altogether, without being converted with optocoupler,
Make simple circuit, reduces cost.
In order to solve the above technical problems, the utility model embodiment provides a kind of circuit of MCU driving ultrasonic wave, packet
It includes: ultrasonic drive circuit, ultrasonic wave match circuit, half-bridge circuit, ac input circuit and reduction voltage circuit；
The ultrasonic drive circuit is connect with the ultrasonic wave match circuit；The half-bridge circuit and the ultrasonic wave
It is connected with circuit with the ultrasonic drive circuit；Ac input circuit output end one end is connect with the reduction voltage circuit,
The other end is connect with the half-bridge circuit；The reduction voltage circuit is connect with the ultrasonic drive circuit.
Further, the ultrasonic drive circuit includes single-chip microcontroller, the first triode, the second triode, the first coupling
Transformer, the first power tube and the second power tube；
The single-chip microcontroller includes that the first pulse width modulation delivery outlet, the second pulse width modulation delivery outlet and single-chip microcontroller are defeated
Enter channel；The first pulse width of single-chip microcontroller modulation delivery outlet is connect with the base stage of first triode；The single-chip microcontroller
Second pulse width modulation delivery outlet is connect with the base stage of second triode；
The collector of first triode is connect with reduction voltage circuit, the emitter of first triode and described second
The collector of triode connects；The emitter and first coupling of the collector of second triode and first triode
Close transformer connection；The emitter of second triode is grounded；
First coupling transformer includes two windings；Two windings of first coupling transformer are respectively coupled to
The grid grade of first power tube and second power；
The drain electrode of first power tube is connect with the half-bridge circuit；The source electrode of first power tube and described second
The drain electrode of power tube connects；The source electrode of second power tube is grounded；
The single-chip microcontroller input channel is connected with the ultrasonic wave match circuit.
Further, the ultrasonic wave match circuit includes energy converter, mutual inductor and the first rectifier bridge；
Described energy converter one end is connect with the half-bridge circuit, and the other end is connect with the mutual inductor；The mutual inductor with
The first rectifier bridge connection；First rectifier bridge is connect with the single-chip microcontroller input channel.
Further, the half-bridge circuit includes: first capacitor, the second capacitor, third capacitor and the second coupling transformer；
The first capacitor and second capacitance connection；The first capacitor and the third capacitor are altogether；Described
Two capacitors and the third capacitance connection；Second capacitor and the third capacitor are connect with second coupling transformer；
The connection of the first capacitor and first power tube；Second capacitor and the third capacitor and first power tube
Drain electrode connection；Second coupling transformer is connect with the source electrode of first power tube.
Further, the reduction voltage circuit includes Unisolated switch power supply chip and voltage-stablizer；
Output end one end of the Unisolated switch power supply chip is connect with first transistor collector, the other end with
The input terminal of the voltage-stablizer connects；The output end of the voltage-stablizer is connect with the single-chip microcontroller of the ultrasonic drive circuit.
Further, the Unisolated switch power supply chip are as follows: the Unisolated switch power supply chip of model DK106.
Further, the ac input circuit includes fuse, varistor and the second rectifier bridge；
The fuse is connect with the varistor；The fuse and the varistor and second rectifier bridge
Connection.
Further, the single-chip microcontroller are as follows: the single-chip microcontroller of model SC92F7003.
Therefore the circuit of MCU driving ultrasonic wave provided by the embodiment of the utility model, it is controlled using single-chip microcontroller
The frequency of PWM square wave processed, to realize frequency-tracking.
Further, the single-chip microcontroller and power tube that the utility model embodiment uses altogether, can directly control power tube,
It need not be converted with optocoupler, keep circuit more succinct, and reduce manufacturing cost.
Detailed description of the invention
Fig. 1 is a kind of a kind of structural representation of the circuit of MCU driving ultrasonic wave provided by the embodiment of the utility model
Figure；
Fig. 2 is that a kind of a kind of circuit structure of the circuit of MCU driving ultrasonic wave provided by the embodiment of the utility model shows
It is intended to；
Fig. 3 is a kind of electrical block diagram of reduction voltage circuit provided by the embodiment of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe.
It is a kind of a kind of structure of the circuit of MCU driving ultrasonic wave provided by the embodiment of the utility model referring to Fig. 1
Schematic diagram, comprising: ultrasonic drive circuit 101, ultrasonic wave match circuit 102, half-bridge circuit 103, ac input circuit 104,
Reduction voltage circuit 105 and display 106.
Ultrasonic drive circuit 101 is connect with ultrasonic wave match circuit 102.Half-bridge circuit 103 and ultrasonic wave match circuit
102 and ultrasonic drive circuit 101 connect.104 output end one end of ac input circuit is connect with reduction voltage circuit 105, the other end
It is connect with half-bridge circuit 103.Ultrasonic drive circuit 101 is connect with external display 106.
Ultrasonic drive circuit 101 exports the complementary square-wave signal driving half-bridge circuit 103 with dead time and works, and allows partly
High-frequency signal is transmitted to the match circuit 102 of ultrasonic wave by bridge circuit 103, makes ultrasonic wave match circuit 102 that resonance occur, and is generated
Resonance signal.The resonance signal of generation is sent back ultrasonic drive circuit 101 by ultrasonic wave match circuit 102, aobvious by outside
Show that device 106 shows obtained resonance frequency.
It further, referring to fig. 2, is a kind of circuit of MCU driving ultrasonic wave provided by the embodiment of the utility model
A kind of electrical block diagram.
Ultrasonic drive circuit 101 includes single-chip microcontroller U1, the first triode Q1, the second triode Q2, the first coupling transformation
Device T3, the first power tube Q5 and the second power tube Q6.Single-chip microcontroller U1 include the first pulse width modulation delivery outlet P1.0/PWM4,
The input channel P1.4/AN4 of second pulse width modulation delivery outlet P2.5/PWM1 and single-chip microcontroller U1.The first pulse of single-chip microcontroller is wide
Degree modulation delivery outlet P1.0/PWM4 is connect with the base stage of the first triode Q1.The second pulse width of single-chip microcontroller modulates delivery outlet
P2.5/PWM1 is connect with the base stage of the second triode Q2.The collector of first triode Q1 is connect with reduction voltage circuit 105, and first
The emitter of triode Q1 is connect with the collector of the second triode Q2.The collector of second triode Q1 and the first triode Q1
Emitter connect with the first coupling transformer T3.The emitter of second triode Q2 is grounded.First coupling transformer T3 includes
Two windings, two windings of the first coupling transformer T3 are respectively coupled to the grid grade of the first power tube Q5 and the second power Q6.
The drain electrode of first power tube Q5 and the connection of half-bridge circuit 103, the drain electrode of the source electrode of the first power tube Q5 and the second power tube Q6
Connection, the grounded drain of the second power tube Q6.
Single-chip microcontroller U1 modulates delivery outlet P1.0/PWM4 by the first pulse width and the second pulse width modulates delivery outlet
P2.5/PWM1 exports the square-wave signal with dead time, and driving half-bridge circuit 103 works.
Further, half-bridge circuit 103 includes first capacitor C1, the second capacitor C2, the coupling change of third capacitor C3 and second
Depressor T1.First capacitor C1 is connect with the second rectifier bridge BR1 of ac input circuit 104.Half-bridge circuit 103 is electric by exchange input
Rectifier power source after the rectifier bridge BR1 progress power rectifier on road 104 is as power supply.First capacitor C1 and the second capacitor C2 connects
It connects, first capacitor C1 and third capacitor C3 are altogether.Second capacitor C2 is connect with third capacitor C3, the second capacitor C2 and third capacitor
C3 is connect with the second coupling transformer T1, and first capacitor C1 is connect with the first power tube Q5, the second capacitor C2 and third capacitor C3
It is connect with the drain electrode of the first power tube Q5, the second coupling transformer T1 is connect with the source electrode of the first power tube Q5.
When ultrasonic drive circuit 101 starts, obtain the second coupling transformer T1 output end in half-bridge circuit 103
The high-voltage signal is transmitted to changing in ultrasonic wave match circuit 102 by the second coupling transformer T1 by the high-voltage signal of frequency conversion
Energy device Y1, brings it about resonance.
Further, ultrasonic wave match circuit 102 includes energy converter Y1, mutual inductor T2 and the first rectifier bridge BR2.Energy converter
The one end Y1 is connect with half-bridge circuit 103, and the other end is connect with mutual inductor T2.Mutual inductor T2 is connect with the first rectifier bridge BR2.First
Rectifier bridge BR2 is connect with the input channel P1.4/AN4 of the single-chip microcontroller U1 in ultrasonic drive circuit 101.
Energy converter Y1 generates resonance after receiving the high-frequency signal that half-bridge circuit 103 sends over, and electric current is maximum after resonance, warp
Voltage is maximum after mutual inductor T2 induction, feeds back to single-chip microcontroller after the voltage of induction is become direct current using the first rectifier bridge BR2
The input channel P1.4/AN4 of U1.The input channel P1.4/AN4 of single-chip microcontroller U1 receives the sense that ultrasonic wave match circuit 102 is fed back
After answering voltage, A/D conversion is carried out in inside in single-chip microcontroller U1, voltage value is converted into AD value.Single-chip microcontroller U1 is connected by pin
External display 106 shows resulting AD value.
It should be noted that single-chip microcontroller U1 can be, but not limited to as model be SC92F7003.
Further, ac input circuit 104 includes fuse F1, varistor VR1 and the second rectifier bridge BR1.Fusing
Device F1 is connect with varistor VR1, and fuse F1 and varistor VR1 are connect with the second rectifier bridge BR1.AC input power
105 export power supply after electromagnetic interference the second rectifier bridge BR1 bridge rectifier of processing.
It further, is a kind of circuit structure signal of reduction voltage circuit provided by the embodiment of the utility model referring to Fig. 3
Figure.Reduction voltage circuit 105 includes Unisolated switch power supply chip U2 and voltage-stablizer U3.
Unisolated switch power supply chip U2 input terminal is connect with 104 output end of ac input circuit, for that will exchange input
The power supply that circuit 104 exports is depressurized to 12V.Unisolated switch power supply chip U2 output end one end and ultrasonic drive circuit
The first triode Q1 and the second triode Q2 connection in 101.The output end of non-isolated power supply chip U2 is for exporting 12V electricity
Pressure is that the first triode Q1 and the second triode Q2 powers.The Unisolated switch power supply chip U2 other end is connect with voltage-stablizer U3.
Voltage-stablizer U3 output end is connect with the single-chip microcontroller U1 in ultrasonic drive circuit 101.Voltage-stablizer U3 is for being converted to 12V electric current
5V electric current is single-chip microcontroller U1 power supply.
Further, the Unisolated switch power supply chip in reduction voltage circuit can be, but not limited to as model be DK106, decompression
The interior voltage-stablizer of circuit can be, but not limited to as model be HT7150.
Since the prior art drives ultrasonic circuit using dedicated power supply chip, cannot achieve ultrasonic frequency with
Track, and single-chip microcontroller is only used to show and timing, cannot directly control power tube state, so that entire circuit is excessively lengthy and jumbled, cost
It is excessively high.But the utility model keeps energy converter humorous using single-chip microcontroller output PWM square wave driving half-bridge circuit work by mutual inductor
Vibration, then send to single-chip microcontroller after output voltage being rectified by ultrasonic wave match circuit, single-chip microcontroller is according to the information control received
The frequency of PWM square wave processed realizes frequency-tracking.
Further, the reduction voltage circuit that the utility model embodiment uses, allowed after being depressured single-chip microcontroller and power tube altogether,
So that monolithic function is directly controlled power tube, keeps circuit more succinct, and reduce circuit cost.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the protection scope of the utility model.
Claims (9)
1. a kind of circuit of MCU driving ultrasonic wave characterized by comprising ultrasonic drive circuit, ultrasonic wave matching electricity
Road, half-bridge circuit, ac input circuit and reduction voltage circuit；
The ultrasonic drive circuit is connect with the ultrasonic wave match circuit；
The half-bridge circuit is connect with the ultrasonic wave match circuit and the ultrasonic drive circuit；
Ac input circuit output end one end is connect with the reduction voltage circuit, and the other end is connect with the half-bridge circuit；
The reduction voltage circuit is connect with the ultrasonic drive circuit.
2. the circuit of MCU driving ultrasonic wave according to claim 1, which is characterized in that the ultrasonic drive circuit
Including single-chip microcontroller, the first triode, the second triode, the first coupling transformer, the first power tube and the second power tube；
The single-chip microcontroller includes that the first pulse width modulation delivery outlet, the second pulse width modulation delivery outlet and single-chip microcontroller input are logical
Road；
The first pulse width of single-chip microcontroller modulation delivery outlet is connect with the base stage of first triode；
The second pulse width of single-chip microcontroller modulation delivery outlet is connect with the base stage of second triode；
The collector of first triode is connect with reduction voltage circuit, the emitter of first triode and the two or three pole
The collector of pipe connects；
The collector of second triode is connect with the emitter of first triode with first coupling transformer；
The emitter of second triode is grounded；
First coupling transformer includes two windings；
Two windings of first coupling transformer are respectively coupled to the grid grade of first power tube Yu second power；
The drain electrode of first power tube is connect with the half-bridge circuit；
The source electrode of first power tube is connect with the drain electrode of second power tube；
The source electrode of second power tube is grounded；
The single-chip microcontroller input channel is connected with the ultrasonic wave match circuit.
3. the circuit of MCU driving ultrasonic wave according to claim 2, which is characterized in that the ultrasonic wave match circuit
Including energy converter, mutual inductor and the first rectifier bridge；
Described energy converter one end is connect with the half-bridge circuit, and the other end is connect with the mutual inductor；
The mutual inductor is connect with first rectifier bridge；
First rectifier bridge is connect with the single-chip microcontroller input channel.
4. the circuit of MCU driving ultrasonic wave according to claim 2, which is characterized in that the half-bridge circuit includes:
First capacitor, the second capacitor, third capacitor and the second coupling transformer；
The first capacitor and second capacitance connection；
The first capacitor and the third capacitor are altogether；
Second capacitor and the third capacitance connection；
Second capacitor and the third capacitor are connect with second coupling transformer；
The connection of the first capacitor and first power tube；
Second capacitor and the third capacitor are connect with the drain electrode of first power tube；
Second coupling transformer is connect with the source electrode of first power tube.
5. the circuit of MCU driving ultrasonic wave according to claim 2, which is characterized in that the reduction voltage circuit includes non-
Isolating switch power chip and voltage-stablizer；
Output end one end of the Unisolated switch power supply chip is connect with first transistor collector, the other end with it is described
The input terminal of voltage-stablizer connects；
The output end of the voltage-stablizer is connect with the single-chip microcontroller of the ultrasonic drive circuit.
6. the circuit of MCU driving ultrasonic wave according to claim 5, which is characterized in that the Unisolated switch power supply
Chip are as follows: the Unisolated switch power supply chip of model DK106.
7. the circuit of MCU driving ultrasonic wave according to claim 1, which is characterized in that the ac input circuit packet
Include fuse, varistor and the second rectifier bridge；
The fuse is connect with the varistor；
The fuse and the varistor are connect with second rectifier bridge.
8. the circuit of MCU driving ultrasonic wave according to claim 2, which is characterized in that the single-chip microcontroller are as follows: model
For the single-chip microcontroller of SC92F7003.
9. the circuit of MCU driving ultrasonic wave according to claim 1, which is characterized in that the ultrasonic drive circuit
It is connect with external display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821026688.0U CN208537941U (en) | 2018-06-29 | 2018-06-29 | A kind of circuit of MCU driving ultrasonic wave |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821026688.0U CN208537941U (en) | 2018-06-29 | 2018-06-29 | A kind of circuit of MCU driving ultrasonic wave |
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| CN208537941U true CN208537941U (en) | 2019-02-22 |
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| CN201821026688.0U Active CN208537941U (en) | 2018-06-29 | 2018-06-29 | A kind of circuit of MCU driving ultrasonic wave |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11660637B2 (en) | 2020-03-05 | 2023-05-30 | I-Shou University | Driving device |
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2018
- 2018-06-29 CN CN201821026688.0U patent/CN208537941U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11660637B2 (en) | 2020-03-05 | 2023-05-30 | I-Shou University | Driving device |
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