CN206540870U - A kind of ultrasonic wave water sludge interface measurement apparatus - Google Patents
A kind of ultrasonic wave water sludge interface measurement apparatus Download PDFInfo
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- CN206540870U CN206540870U CN201720168333.4U CN201720168333U CN206540870U CN 206540870 U CN206540870 U CN 206540870U CN 201720168333 U CN201720168333 U CN 201720168333U CN 206540870 U CN206540870 U CN 206540870U
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Abstract
The utility model is related to a kind of ultrasonic wave water sludge interface measurement apparatus, including CPU, transducer driving circuit, transducer, the first amplitude limiter circuit, the second amplitude limiter circuit, the first differential amplifier circuit, the second differential amplifier circuit and detecting circuit；CPU is connected with transducer driving circuit and detecting circuit, first amplitude limiter circuit is connected with transducer, first differential amplifier circuit is connected with the first amplitude limiter circuit, second the first differential amplifier circuit of amplitude limiter circuit is connected, second differential amplifier circuit is connected with the first differential amplifier circuit, and detecting circuit is connected with the second differential amplifier circuit.The utility model uses transmitting gain control technology, and the dynamic range and mud layer resolution capability of signal are substantially increased on the premise of signal to noise ratio is preferentially improved, more operating modes are enabled adaptation to.
Description
Technical field
The utility model is related to ultrasonic measurement field, more particularly to a kind of ultrasonic wave water sludge interface measurement apparatus.
Background technology
Sedimentation basin its mud layer thickness in water treatment procedure is important process control parameters, general to use water sludge interface meter
Measure.Common water sludge interface is in respect of two kinds, and one kind is photoelectric type measuring mode, and its structure is more complicated, working service
Workload is big, seldom uses in practice；One kind is ultrasonic wave water sludge interface meter, and occasion using effect in part is not good in practice, main
If because mud layer situation is complicated, some muddy water are substantially layered, and interface is clear；Some mud layers are from low concentration gradually excessively to highly concentrated
Degree, interface is unintelligible；Also some mud scum ultrasonic reflection signals are very faint, cause the ultrasonic signal dynamic range of measurement big, letter
Make an uproar than difference.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of ultrasonic wave water sludge interface measurement apparatus, and this practicality is new
Type uses transmitting gain control technology, and the dynamic range and mud layer of signal are substantially increased on the premise of signal to noise ratio is preferentially improved
Resolution capability, enables adaptation to more operating modes.
The technical scheme that the utility model solves above-mentioned technical problem is as follows：A kind of ultrasonic wave water sludge interface measurement apparatus,
Including CPU, transducer driving circuit, transducer, the first amplitude limiter circuit, the second amplitude limiter circuit, the first differential amplification
Circuit, the second differential amplifier circuit and detecting circuit；The CPU, is connected with the transducer driving circuit, uses
The transducer transmitting ultrasonic signal is driven in controlling the transducer driving circuit；First amplitude limiter circuit, it is and described
Transducer is connected, and the echo-signal for being exported to the transducer carries out amplitude limit；First differential amplifier circuit, it is and described
First amplitude limiter circuit is connected, and differential amplification is carried out for the output signal to first amplitude limiter circuit；The second amplitude limit electricity
Road, is connected with first differential amplifier circuit, and amplitude limit is carried out for the feedback signal to first differential amplifier circuit；Institute
The second differential amplifier circuit is stated, is connected with first differential amplifier circuit, for the defeated of first differential amplifier circuit
Go out signal and carry out differential amplification；The filter circuit, is connected with second differential amplifier circuit, for second difference
The output signal of amplifying circuit is filtered；The detecting circuit, is connected with second differential amplifier circuit, for described
The output signal of second differential amplifier circuit carries out detection；The CPU, is also connected with the detecting circuit, is used for
Water sludge interface situation is obtained according to the output signal of detecting circuit.
The beneficial effects of the utility model are：
1st, the first amplitude limiter circuit can carry out amplitude limit to larger echo-signal, and overvoltage is provided for the first differential amplifier circuit
Protection, and then completely retain for less echo-signal, improve signal to noise ratio；
2nd, the feedback fraction of the first differential amplifier circuit, can by the way of amplitude limiter circuit carries out amplitude limit to feedback signal
The non-linear amplification to echo-signal is realized, is conducive to Correct Analysis water sludge interface.
On the basis of above-mentioned technical proposal, the utility model can also do following improvement.
Further, in addition to filter circuit；The filter circuit, is connected with second differential amplifier circuit, for pair
The output signal of second differential amplifier circuit is filtered；The detecting circuit, is connected with the filter circuit, for pair
The output signal of the filter circuit carries out detection.
Beneficial effect using above-mentioned further scheme is to prevent the noise signal of specific frequency, improves signal to noise ratio.
Further, the transducer driving circuit includes FET drive circuit, DC amplification circuit, transformer and field
Effect pipe；The FET drive circuit, is connected with the grid of the FET, for being inputted according to CPU
Square-wave signal drive the break-make of the FET；The drain electrode of the FET and the output end of the DC amplification circuit
The primary side with the transformer is connected respectively, and the secondary of the transformer is connected with the transducer respectively, and the transformer is used
Exported after when the FET is turned on by the voltage amplification of the input signal of the DC amplification circuit to the transducing
Device.
Beneficial effect using above-mentioned further scheme is to realize transmitting by the change of transformer primary side DC voltage
The adjustment of power, the simple and reliable property of implementation method is high, it is to avoid be easily caused using the transmitting of constant power many when small range is measured
The problem of erroneous judgement of secondary echo and saturation, strong and weak electric isolution is realized using transformer in addition.
Further, first amplitude limiter circuit includes resistance R1, resistance R2, diode D1 and diode D2；The resistance
The positive input terminal of the receiving terminal of R1 one end connection transducer, the other end connects diode D1 anode and diode D2 respectively
Negative electrode, diode D1 negative electrode and diode D2 anode connect resistance R2 one end respectively, and resistance R2 other end connection is changed
The negative input end of the receiving terminal of energy device.
Beneficial effect using above-mentioned further scheme is, when diode D1 and diode D2 partial pressure are more than its electric conduction
During pressure, double limiting can be played a part of to echo-signals such as larger transmission signals and bottom of pond, so that the first difference be put
The input voltage limitation of big circuit within the specific limits, plays a part of overvoltage protection, when diode D1 and diode D2 point
When pressure is less than its conducting voltage, so as to completely retain the mud face echo-signal of very little, signal to noise ratio is improved.
Further, second amplitude limiter circuit includes diode D3 and diode D4；The anode and two of the diode D3
Pole pipe D4 negative electrode respectively with feedback resistance RfOne end connection, diode D3 negative electrode and diode D4 anode respectively with instead
Feed resistance RfThe other end connection.
Beneficial effect using above-mentioned further scheme is, in feedback resistance RfOn voltage be less than D3, D4 electric conduction
During pressure, D3, D4 is off state, its equivalent resistance RDIt is regarded as infinitely great, amplification of the amplifying circuit to input signal
Multiple is Rf/Ra, as feedback resistance RfOn voltage be more than D3, during D4 conducting voltage, D3 and D4 equivalent resistance RDAnd feedback
Resistance RfNew feedback resistance is collectively constituted after parallel connection, its multiplication factor is obviously smaller than Rf/Ra, and RDIt is further in voltage
It can be remarkably decreased during increase, even below Ra, it is achieved in the non-linear amplification to input signal.
Further, second amplitude limiter circuit includes diode bav99；The anode and negative electrode of the diode bav99 connects
Meet rear and feedback resistance RfOne end connection, diode bav99 common port and feedback resistance RfThe other end connection.
Beneficial effect using above-mentioned further scheme is, in feedback resistance RfOn voltage be less than bav99 electric conduction
During pressure, bav99 is off state, its equivalent resistance RDIt is regarded as infinitely great, amplification of the amplifying circuit to input signal
Multiple is Rf/Ra, as feedback resistance RfOn voltage be more than bav99 conducting voltage when, bav99 equivalent resistance RDAnd feedback
Resistance RfNew feedback resistance is collectively constituted after parallel connection, its multiplication factor is obviously smaller than Rf/Ra, and RDIt is further in voltage
It can be remarkably decreased during increase, even below Ra, it is achieved in the non-linear amplification to input signal.
Further, the transducer is 200KHz~1000KHz transmitting-receiving integrated ultrasonic transducer.
Brief description of the drawings
Fig. 1 is a kind of attachment structure signal for ultrasonic wave water sludge interface measurement apparatus that the utility model embodiment one is provided
Figure；
Fig. 2 is a kind of attachment structure signal for ultrasonic wave water sludge interface measurement apparatus that the utility model embodiment two is provided
Figure；
The structural representation for the transducer driving circuit that Fig. 3 provides for the utility model embodiment；
The first amplitude limiter circuit, the first differential amplifier circuit and the second amplitude limit electricity that Fig. 4 provides for the utility model embodiment
The attachment structure schematic diagram on road；
The first amplitude limiter circuit that Fig. 5 provides for the utility model embodiment, the first differential amplifier circuit and another second
The attachment structure schematic diagram of amplitude limiter circuit.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, the first amplitude limiter circuit, the 2, first differential amplifier circuit, the 3, second amplitude limiter circuit.
Embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit scope of the present utility model.
As shown in figure 1, a kind of ultrasonic wave water sludge interface measurement apparatus, including CPU, transducer driving circuit,
Transducer, the first amplitude limiter circuit, the second amplitude limiter circuit, the first differential amplifier circuit, the second differential amplifier circuit and detecting circuit；
The CPU, is connected with the transducer driving circuit, for controlling the transducer driving circuit driving described
Transducer launches ultrasonic signal；First amplitude limiter circuit, is connected with the transducer, for what is exported to the transducer
Echo-signal carries out amplitude limit；First differential amplifier circuit, is connected with first amplitude limiter circuit, for limiting described first
The output signal of width circuit carries out differential amplification；Second amplitude limiter circuit, is connected with first differential amplifier circuit, is used for
Feedback signal to first differential amplifier circuit carries out amplitude limit；Second differential amplifier circuit, with first difference
Amplifying circuit is connected, and differential amplification is carried out for the output signal to first differential amplifier circuit；The filter circuit, with
The second differential amplifier circuit connection, is filtered for the output signal to second differential amplifier circuit；The inspection
Wave circuit, is connected with second differential amplifier circuit, is examined for the output signal to second differential amplifier circuit
Ripple；The CPU, is also connected with the detecting circuit, for obtaining muddy water circle according to the output signal of detecting circuit
Planar condition.
Specifically, the first amplitude limiter circuit can provide overvoltage protection for the first differential amplifier circuit；First differential amplification electricity
The feedback fraction on road is carried out using amplitude limiter circuit to feedback signal by the way of amplitude limit, realizes low level signal amplification multiple by feedback resistance
Determine, the multiplication factor of big signal is determined by the resistance of amplitude limiter circuit.Aftershock signal and sedimentation basin after being launched due to ultrasonic wave
The echo-signal of bottom surface differs greatly compared to mud face signal amplitude, and the circuit both ensure that the normal amplification of mud face signal, and not lose
Other big echo-signals are really remained, non-linear compression has been carried out equivalent to echo-signal；Detecting circuit can be extracted
The envelope of ultrasonic signal.
In addition, the reception amplifier section of the present apparatus can increase programmable amplifier, dynamic range and flexibility are further improved.
Also realize that binary channels (two ultrasonic sensors) is gathered using switch switching.
Alternatively, as in one embodiment of the present utility model, as shown in Fig. 2 the present apparatus also includes filter circuit；Institute
Filter circuit is stated, is connected with second differential amplifier circuit, is entered for the output signal to second differential amplifier circuit
Row filtering；The detecting circuit, is connected with the filter circuit, and detection is carried out for the output signal to the filter circuit.
Specifically, filter circuit can prevent the noise signal of specific frequency, signal to noise ratio is improved.
Alternatively, as in one embodiment of the present utility model, as shown in figure 3, the transducer driving circuit includes
FET drive circuit, DC amplification circuit, transformer T and FET K1；The FET drive circuit, it is and described
FET K1 grid connection, the square-wave signal for being inputted according to CPU drives the FET K1's logical
It is disconnected；The primary side of the drain electrode of the FET K1 and the output end of the DC amplification circuit respectively with the transformer T is connected,
The secondary of the transformer T is connected with the transducer respectively, and the transformer T is used for will when the FET K1 is turned on
Exported after the voltage amplification of the input signal of the DC amplification circuit to the transducer.
Specifically, the change by transformer T primary side DC voltages realizes the adjustment of transmission power, implementation method is simple
Reliably, the dynamic range of adjustment is big, and strong and weak electric isolution is realized in addition.
Alternatively, as in one embodiment of the present utility model, as shown in figure 4, first amplitude limiter circuit 1 includes electricity
Hinder R1, resistance R2, diode D1 and diode D2；The positive input terminal of the receiving terminal of one end connection transducer of the resistance R1,
The other end connects diode D1 anode and diode D2 negative electrode, diode D1 negative electrode and diode D2 anode point respectively
Not Lian Jie resistance R2 one end, resistance R2 the other end connection transducer receiving terminal negative input end.
Specifically, diode D1 and diode D2 can play a part of double limiting, so that the first differential amplification is electric
The input voltage limitation on road 3 within the specific limits, plays a part of overvoltage protection.
Alternatively, in this embodiment, as shown in figure 4, second amplitude limiter circuit 2 includes diode D3 and diode
D4；The anode of the diode D3 and diode D4 negative electrode respectively with feedback resistance RfOne end connection, diode D3 the moon
Pole and diode D4 anode respectively with feedback resistance RfThe other end connection.
Specifically, in feedback resistance RfOn voltage be less than diode D3, during diode D4 conducting voltage, diode
D3, diode D4 is off state, its equivalent resistance RDIt is regarded as infinitely great, the first 3 pairs of differential amplifier circuit input letter
Number multiplication factor be Rf/Ra, as feedback resistance RfOn voltage be more than diode D3, during diode D4 conducting voltage, two poles
Pipe D3 and diode D4 equivalent resistance RDWith feedback resistance RfNew feedback resistance is collectively constituted after parallel connection, its multiplication factor
Obviously smaller than Rf/Ra, and RDIt can be remarkably decreased when voltage further increases, even below Ra, it is achieved in input signal
Non-linear amplification.
Alternatively, in this embodiment, as shown in figure 5, second amplitude limiter circuit 2 includes diode bav99；Described two
With feedback resistance R after pole pipe bav99 anode and negative electrode connectionfOne end connection, diode bav99 common port and feedback electricity
Hinder RfThe other end connection.
Specifically, in feedback resistance RfOn voltage be less than bav99 conducting voltage when, bav99 is off state, its
Equivalent resistance RDIt is regarded as infinitely great, the amplifying circuit is R to the multiplication factor of input signalf/Ra, as feedback resistance RfOn
Voltage be more than bav99 conducting voltage when, bav99 equivalent resistance RDWith feedback resistance RfCollectively constituted after parallel connection new
Feedback resistance, its multiplication factor is obviously smaller than Rf/Ra, and RDIt can be remarkably decreased when voltage further increases, even below
Ra, it is achieved in the non-linear amplification to input signal.
Alternatively, in this embodiment, the transducer is 200KHz~1000KHz transmitting-receiving integrated ultrasonic wave transducer
Device.
Further, since the waveform signal to noise ratio of single acquisition is relatively low, useful signal is possibly even submerged in noise completely, and
And mud position belongs to slowly varying signal, the utility model realizes high speed and high score by the method being averaging after multiple repairing weld
The balance of resolution, the specific mode for being local smoothing method filtering is employed in instrument resolving range that calculates further improves noise
Than.
Collect after complete echo-signal, the device can be according to default echo signal scope, progressively quick adjustment
Transmission power, rather than using the transmitting of constant power, the erroneous judgement of multiecho and saturation when can avoid the small range from measuring.
It can be shown on a display screen after handling echo-signal so that user can become apparent from, intuitively observe
The mud layer distribution situation in whole pond, and pond face blind area and bottom of pond blind area are can be clearly seen that, carrying out water sludge interface
Before identification, it is blind that user's needs set pond face blind area design line and bottom of pond blind area design line to come shieding pond face on the interface of display screen
Area and bottom of pond blind area, so that the aftershock signal after transmitting is got rid of, the fixed interference letter such as excessive bottom of pond reflected signal and crane span structure
Number, then device starts water sludge interface to be identified measurement, and identification method is included by rising edge and peak value two ways, its
In the former be adapted to slowly varying water sludge interface identification, the latter is adapted to clearly water sludge interface and recognizes that specific recognition principle is
Water sludge interface analysis is carried out according to the time difference of transmitting ultrasonic wave and reception echo, belongs to prior art.
Alternatively, the utility model can rinse transducer bottom by timing controlled compact submersible pump from 45 degree of ground direction
The mode in face, realizes automatic cleaning, it is ensured that transducer reliably working.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in guarantor of the present utility model
Within the scope of shield.
Claims (7)
1. a kind of ultrasonic wave water sludge interface measurement apparatus, it is characterised in that including CPU, transducer driving circuit,
Transducer, the first amplitude limiter circuit, the second amplitude limiter circuit, the first differential amplifier circuit, the second differential amplifier circuit and detecting circuit；
The CPU, is connected with the transducer driving circuit, for controlling the transducer driving circuit to drive
The transducer launches ultrasonic signal；
First amplitude limiter circuit, is connected with the transducer, and the echo-signal for being exported to the transducer carries out amplitude limit；
First differential amplifier circuit, is connected with first amplitude limiter circuit, for the output to first amplitude limiter circuit
Signal carries out differential amplification；
Second amplitude limiter circuit, is connected with first differential amplifier circuit, for first differential amplifier circuit
Feedback signal carries out amplitude limit；
Second differential amplifier circuit, is connected with first differential amplifier circuit, for first differential amplification electricity
The output signal on road carries out differential amplification；
The detecting circuit, is connected with second differential amplifier circuit, for the output to second differential amplifier circuit
Signal carries out detection；
The CPU, is also connected with the detecting circuit, for obtaining muddy water according to the output signal of detecting circuit
State of interface.
2. ultrasonic wave water sludge interface measurement apparatus according to claim 1, it is characterised in that also including filter circuit；
The filter circuit, is connected with second differential amplifier circuit, for the output to second differential amplifier circuit
Signal is filtered；
The detecting circuit, is connected with the filter circuit, and detection is carried out for the output signal to the filter circuit.
3. ultrasonic wave water sludge interface measurement apparatus according to claim 1, it is characterised in that the transducer driving circuit bag
Include FET drive circuit, DC amplification circuit, transformer and FET；
The FET drive circuit, is connected with the grid of the FET, for what is inputted according to CPU
Square-wave signal drives the break-make of the FET；
The primary side of the drain electrode of the FET and the output end of the DC amplification circuit respectively with the transformer is connected, institute
The secondary for stating transformer is connected with the transducer respectively, and the transformer is used for will be described straight when the FET is turned on
Exported after the voltage amplification of the input signal of current amplifier to the transducer.
4. ultrasonic wave water sludge interface measurement apparatus according to claim 3, it is characterised in that the first amplitude limiter circuit bag
Include resistance R1, resistance R2, diode D1 and diode D2；
The positive input terminal of the receiving terminal of one end connection transducer of the resistance R1, the other end connects diode D1 anode respectively
With diode D2 negative electrode, diode D1 negative electrode and diode D2 anode connect resistance R2 one end respectively, resistance R2's
The negative input end of the receiving terminal of other end connection transducer.
5. ultrasonic wave water sludge interface measurement apparatus according to claim 4, it is characterised in that the second amplitude limiter circuit bag
Include diode D3 and diode D4；
The anode of the diode D3 and diode D4 negative electrode respectively with feedback resistance RfOne end connection, diode D3 the moon
Pole and diode D4 anode respectively with feedback resistance RfThe other end connection.
6. ultrasonic wave water sludge interface measurement apparatus according to claim 4, it is characterised in that the second amplitude limiter circuit bag
Include diode bav99；
With feedback resistance R after anode and the negative electrode connection of the diode bav99fOne end connection, diode bav99's is public
End and feedback resistance RfThe other end connection.
7. the ultrasonic wave water sludge interface measurement apparatus according to claim any one of 1-6, it is characterised in that the transducer
For 200KHz~1000KHz transmitting-receiving integrated ultrasonic transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720168333.4U CN206540870U (en) | 2017-02-23 | 2017-02-23 | A kind of ultrasonic wave water sludge interface measurement apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720168333.4U CN206540870U (en) | 2017-02-23 | 2017-02-23 | A kind of ultrasonic wave water sludge interface measurement apparatus |
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| CN206540870U true CN206540870U (en) | 2017-10-03 |
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| CN201720168333.4U Active CN206540870U (en) | 2017-02-23 | 2017-02-23 | A kind of ultrasonic wave water sludge interface measurement apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680369A (en) * | 2017-02-23 | 2017-05-17 | 天健创新（北京）监测仪表股份有限公司 | Ultrasonic mud-water interface measuring device and method |
| CN109450397A (en) * | 2018-12-09 | 2019-03-08 | 中国航空工业集团公司上海航空测控技术研究所 | A kind of difference magnetic power rotation speed sensor conditioning circuit |
| CN112557697A (en) * | 2020-11-24 | 2021-03-26 | 安徽曼德克环境科技有限公司 | Ultrasonic flue gas velocity of flow measuring circuit |
-
2017
- 2017-02-23 CN CN201720168333.4U patent/CN206540870U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680369A (en) * | 2017-02-23 | 2017-05-17 | 天健创新（北京）监测仪表股份有限公司 | Ultrasonic mud-water interface measuring device and method |
| CN106680369B (en) * | 2017-02-23 | 2024-02-09 | 天健创新（北京）监测仪表股份有限公司 | Ultrasonic mud-water interface measuring device and method |
| CN109450397A (en) * | 2018-12-09 | 2019-03-08 | 中国航空工业集团公司上海航空测控技术研究所 | A kind of difference magnetic power rotation speed sensor conditioning circuit |
| CN112557697A (en) * | 2020-11-24 | 2021-03-26 | 安徽曼德克环境科技有限公司 | Ultrasonic flue gas velocity of flow measuring circuit |
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