CN204129220U - A kind of radar for backing car transless radiating circuit reduces remained shock circuit - Google Patents
A kind of radar for backing car transless radiating circuit reduces remained shock circuit Download PDFInfo
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- CN204129220U CN204129220U CN201420398466.7U CN201420398466U CN204129220U CN 204129220 U CN204129220 U CN 204129220U CN 201420398466 U CN201420398466 U CN 201420398466U CN 204129220 U CN204129220 U CN 204129220U
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- piezoelectric ceramics
- antiresonant
- radiating
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- 230000035939 shock Effects 0.000 title claims abstract description 15
- 239000000919 ceramic Substances 0.000 claims abstract description 38
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 239000004065 semiconductor Substances 0.000 description 24
- 101100236764 Caenorhabditis elegans mcu-1 gene Proteins 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 102100027069 Odontogenic ameloblast-associated protein Human genes 0.000 description 3
- 101710091533 Odontogenic ameloblast-associated protein Proteins 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 206010049669 Dyscalculia Diseases 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
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- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The utility model discloses a kind of radar for backing car transless radiating circuit and reduces remained shock circuit, comprises control and treatment circuit MCU, driving circuit, reception amplifying circuit and antiresonant circuit; The input end of driving circuit is connected with control and treatment circuit MCU, and output terminal is connected with radiating circuit, and piezoelectric ceramics input end and radiating circuit, output terminal is connected with reception amplifying circuit, and reception amplifying circuit is connected with control and treatment circuit MCU; Described antiresonant circuit and piezoelectric ceramics are connected in parallel, and antiresonant circuit controls its break-make by gauge tap pipe Q3B, control signal is exported by control and treatment circuit MCU, after the transmitting of signal transponder pulse terminates, in t=1-5mS time control switch pipe Q3B conducting piezoelectric ceramics and antiresonant circuit parallel connection, after the t=1-5mS time, gauge tap pipe Q3B not conducting.The utility model can reduce piezoelectric ceramics remained shock, and does not affect circuit sensitivity.
Description
Technical field
The utility model relates to radar for backing car circuit, refers in particular to a kind of radar for backing car transless radiating circuit and reduces remained shock circuit.
Background technology
In prior art, ultrasonic radar probe radiating circuit great majority adopt and drive piezoelectric ceramics (SEN) by transformer, carry out ultrasonic signal transmitting, but, drive piezoelectric ceramics cost higher by transformer, transless drives piezoelectric ceramics (SEN) ultrasonic transmit circuit, is more and more widely used in ultrasonic radar probe.As shown in Figure 1, the transless radiating circuit that prior art discloses, comprises control and treatment circuit (MCU) 10, driving circuit 20, radiating circuit 30 and receives amplifying circuit 40; The input end of described driving circuit 20 is connected with control and treatment circuit (MCU) 10, and output terminal is connected with radiating circuit 30, and piezoelectric ceramics 50 input end and radiating circuit 30, output terminal is connected with reception amplifying circuit 40, receives amplifying circuit 40 and is connected with control and treatment circuit (MCU) 10.
Wherein, described radiating circuit 30 is made up of metal-oxide-semiconductor Q1A, metal-oxide-semiconductor Q2A, metal-oxide-semiconductor Q1B, metal-oxide-semiconductor Q2B, and the G pole of metal-oxide-semiconductor Q1A is connected with driving circuit 20B pin, and S pole is connected with the S pole of metal-oxide-semiconductor Q2A, and D pole is connected with the D pole of metal-oxide-semiconductor Q1B, and be connected to piezoelectric ceramics 50 one end; The G pole of metal-oxide-semiconductor Q2A is connected with driving circuit 20A pin, and D pole is connected with the D pole of metal-oxide-semiconductor Q2B, and is connected to piezoelectric ceramics 50 other end; The G pole of metal-oxide-semiconductor Q1B and driving circuit 20
apin connects, and S pole is connected with the S pole of metal-oxide-semiconductor Q2B; The G pole of metal-oxide-semiconductor Q2B and driving circuit 20
bpin connects.
During described transless radiating circuit work, as shown in Fig. 2 and Fig. 2 a, front semiperiod A exports positive pulse,
aexport negative pulse, Q1A and Q2B conducting, as shown in Fig. 3 and Fig. 3 a, later half cycle B exports positive pulse,
bexport negative pulse, Q2A and Q1B conducting, radiating circuit drives piezoelectric ceramics (SEN), transless radiating circuit, when emission state, equivalent electrical circuit as shown in Figure 4, external transmitting 10-16 cycle ultrasound wave (ultrasonic frequency 40KHz-68KHz) pulse signal, the impulse ejection cycle is T (T=30mS-40mS) signal, after being sent, probe receives barrier reflection ultrasonic signal, signal is sent into and is received amplifying circuit, carry out signal amplification, filtering, analog-to-digital conversion process, the mistiming that tracer signal sends and receives, according to this mistiming dyscalculia thing distance, and output alarm signal or carry out parking etc. function.
But described transless drives piezoelectric ceramic ultrasound radiating circuit, and its defect is: remained shock is larger, ultrasonic radar detection blind area is comparatively large, so reduce remained shock to have become the key of technology.
Utility model content
The purpose of this utility model is to provide a kind of radar for backing car transless radiating circuit to reduce remained shock circuit, to reduce piezoelectric ceramics remained shock, and does not affect circuit sensitivity.
For reaching above-mentioned purpose, solution of the present utility model is:
A kind of radar for backing car transless radiating circuit reduces remained shock circuit, comprises control and treatment circuit MCU, driving circuit, radiating circuit, reception amplifying circuit and antiresonant circuit; The input end of driving circuit is connected with control and treatment circuit MCU, and output terminal is connected with radiating circuit, and piezoelectric ceramics input end and radiating circuit, output terminal is connected with reception amplifying circuit, and reception amplifying circuit is connected with control and treatment circuit MCU; Described antiresonant circuit and piezoelectric ceramics are connected in parallel, and antiresonant circuit controls its break-make by gauge tap pipe Q3B, control signal is exported by control and treatment circuit MCU, after the transmitting of signal transponder pulse terminates, in t=1mS-5mS time time control switch pipe Q3B conducting piezoelectric ceramics and antiresonant circuit parallel connection, after the t=1mS-5mS time, gauge tap pipe Q3B not conducting.
Further, the G pole of described gauge tap pipe Q3B is connected with driving circuit, S pole is connected with piezoelectric ceramics one end, and D pole is connected with antiresonant circuit one end, and the antiresonant circuit other end is connected with the piezoelectric ceramics other end, gauge tap pipe Q3B controls the break-make between antiresonant circuit and piezoelectric ceramics.
After adopting such scheme, the utility model increases an antiresonant circuit and gauge tap pipe Q3B on the circuit base of prior art, described antiresonant circuit and piezoelectric ceramics are connected in parallel, and antiresonant circuit controls its break-make by gauge tap pipe Q3B, control signal is exported by control and treatment circuit MCU, after the transmitting of signal transponder pulse terminates, in t time control switch pipe Q3B conducting piezoelectric ceramics and antiresonant circuit parallel connection, reduce remained shock, after the t time, gauge tap pipe Q3B not conducting, most of the time, gauge tap pipe Q3B not conducting, do not affect circuit sensitivity.
Accompanying drawing explanation
Fig. 1 is the transless radiating circuit figure of prior art;
Fig. 2 be prior art control and treatment circuit (MCU) A pin and
apin output ultrasonic wave signal schematic representation;
Fig. 2 a is Fig. 2 partial enlarged drawing;
Fig. 3 be prior art control and treatment circuit (MCU) B pin and
bpin output ultrasonic wave signal schematic representation;
Fig. 3 a is Fig. 3 partial enlarged drawing;
Fig. 4 is transless radiating circuit figure equivalent circuit diagram when emission state of prior art;
Fig. 5 is circuit diagram of the present utility model;
Fig. 6 is the utility model equivalent circuit diagram when emission state;
Fig. 7 is that the utility model controls and treatment circuit (MCU) exports control signal schematic diagram.
Label declaration
Control and treatment circuit (MCU) 10 driving circuit 20
Radiating circuit 30 receives amplifying circuit 40
Piezoelectric ceramics 50
Control and treatment circuit MCU1 driving circuit 2
Radiating circuit 3 receives amplifying circuit 4
Antiresonant circuit 5 piezoelectric ceramics 6.
Embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in detail.
Consult shown in Fig. 5 to Fig. 7, a kind of radar for backing car transless radiating circuit that the utility model discloses reduces remained shock circuit, comprises control and treatment circuit MCU1, driving circuit 2, radiating circuit 3, receives amplifying circuit 4, antiresonant circuit 5 and piezoelectric ceramics 6.
The input end of driving circuit 2 is connected with control and treatment circuit MCU1, and output terminal is connected with radiating circuit 3, and piezoelectric ceramics 6 input end and radiating circuit 3, output terminal is connected with reception amplifying circuit 5, receives amplifying circuit 5 and is connected with control and treatment circuit MCU1.
Wherein, described radiating circuit 3 is made up of metal-oxide-semiconductor Q1A, metal-oxide-semiconductor Q2A, metal-oxide-semiconductor Q1B, metal-oxide-semiconductor Q2B, and the G pole of metal-oxide-semiconductor Q1A is connected with driving circuit 2B pin, and S pole is connected with the S pole of metal-oxide-semiconductor Q2A, and D pole is connected with the D pole of metal-oxide-semiconductor Q1B, and be connected to piezoelectric ceramics 6 one end; The G pole of metal-oxide-semiconductor Q2A is connected with driving circuit 2A pin, and D pole is connected with the D pole of metal-oxide-semiconductor Q2B, and is connected to piezoelectric ceramics 6 other end; The G pole of metal-oxide-semiconductor Q1B and driving circuit 2
apin connects, and S pole is connected with the S pole of metal-oxide-semiconductor Q2B; The G pole of metal-oxide-semiconductor Q2B and driving circuit 2
bpin connects.
Described antiresonant circuit 5 is connected in parallel with piezoelectric ceramics 6, and antiresonant circuit 5 controls its break-make by gauge tap pipe Q3B, control signal is exported by control and treatment circuit MCU1, after the transmitting of signal transponder pulse terminates, in t=1mS-5mS time control switch pipe Q3B conducting piezoelectric ceramics 6 and antiresonant circuit 5 parallel connection, after the t=1mS-5mS time, gauge tap pipe Q3B not conducting, t=1mS-5mS requires according to properties of product and determines.
The G pole of described gauge tap pipe Q3B is connected with driving circuit 2, S pole is connected with piezoelectric ceramics 6 one end, and D pole is connected with antiresonant circuit 5 one end, and antiresonant circuit 5 other end is connected with piezoelectric ceramics 6 other end, gauge tap pipe Q3B controls the break-make between antiresonant circuit 5 and piezoelectric ceramics 6.
The utility model increases an antiresonant circuit 5 and gauge tap pipe Q3B on the circuit base of prior art, described antiresonant circuit 5 is connected in parallel with piezoelectric ceramics 6, and antiresonant circuit 5 controls its break-make by gauge tap pipe Q3B, control signal is exported by control and treatment circuit MCU1, as shown in Figure 7, and the utility model when emission state, equivalent electrical circuit is as shown in Figure 6, after the transmitting of signal transponder pulse terminates, in t time control switch pipe Q3B conducting piezoelectric ceramics 6 and antiresonant circuit 5 parallel connection, reduce remained shock, after the t time, gauge tap pipe Q3B not conducting, most of the time, gauge tap pipe Q3B not conducting, do not affect circuit sensitivity.
the utility model by reducing quality factor Q value in the method for t time additional damping, antiresonant circuit Q value formula:
From Q value formula, suitably regulate RCL can obtain different Q value, in t time K conducting, low reactance-resistance ratio, falls in circuit in parallel, and remained shock is reduced, and large portion time K disconnects, and does not affect circuit sensitivity.
The foregoing is only preferred embodiment of the present utility model, not to the restriction of this case design, all equivalent variations done according to the design key of this case, all fall into the protection domain of this case.
Claims (1)
1. radar for backing car transless radiating circuit reduces a remained shock circuit, it is characterized in that: comprise control and treatment circuit MCU, driving circuit, radiating circuit, reception amplifying circuit, gauge tap pipe Q3B and antiresonant circuit; The input end of driving circuit is connected with control and treatment circuit MCU, and output terminal is connected with radiating circuit, and piezoelectric ceramics input end and radiating circuit, output terminal is connected with reception amplifying circuit, and reception amplifying circuit is connected with control and treatment circuit MCU; The G pole of described gauge tap pipe Q3B is connected with driving circuit, S pole is connected with piezoelectric ceramics one end, and D pole is connected with antiresonant circuit one end, and the antiresonant circuit other end is connected with the piezoelectric ceramics other end, whether driving circuit controls the break-make between antiresonant circuit and piezoelectric ceramics by the conducting controlling gauge tap pipe Q3B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420398466.7U CN204129220U (en) | 2014-07-18 | 2014-07-18 | A kind of radar for backing car transless radiating circuit reduces remained shock circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420398466.7U CN204129220U (en) | 2014-07-18 | 2014-07-18 | A kind of radar for backing car transless radiating circuit reduces remained shock circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204129220U true CN204129220U (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420398466.7U Expired - Lifetime CN204129220U (en) | 2014-07-18 | 2014-07-18 | A kind of radar for backing car transless radiating circuit reduces remained shock circuit |
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| CN (1) | CN204129220U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298454A (en) * | 2018-09-19 | 2019-02-01 | 西安石油大学 | A kind of effective nuclear quadrupole resonance probe for inhibiting hangover ring |
-
2014
- 2014-07-18 CN CN201420398466.7U patent/CN204129220U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298454A (en) * | 2018-09-19 | 2019-02-01 | 西安石油大学 | A kind of effective nuclear quadrupole resonance probe for inhibiting hangover ring |
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