CN101169662A - External-placed type supersonic liquid level monitoring and alarming device - Google Patents
External-placed type supersonic liquid level monitoring and alarming device Download PDFInfo
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- CN101169662A CN101169662A CNA2007101884616A CN200710188461A CN101169662A CN 101169662 A CN101169662 A CN 101169662A CN A2007101884616 A CNA2007101884616 A CN A2007101884616A CN 200710188461 A CN200710188461 A CN 200710188461A CN 101169662 A CN101169662 A CN 101169662A
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Abstract
The invention discloses a built-out ultrasonic liquid-level monitoring warning device, which comprises an ultrasound receiving probe, an ultrasound emitting device, and a data processing module which is connected with the ultrasound emitting probe. The ultrasound probe is connected with a sucker which is connected with a storage tank wall and the output end of a power amplifier drive of a data processing module. The receiving probe is an ultrasound transducer for receiving ultrasonic and is connected with the amplitude protector of the data processing module, and then is connected with a receiving amplifier and a receiving detector. The output terminal of a signal processor is connected with the ultrasound emitting probe by the power amplifier drive; and the warning signal output terminal of the signal processor is connected with the controller of a warning device to give a sound and light alarm, or is connected with a controlled device which needs a switching value. The built-out ultrasonic liquid-level monitoring warning device is attached to the outside of a to-be-detected storage tank which does not need an opening. The invention has the advantages of simple structure, convenient assembly and maintenance, good reliability and safety, low power, and high detecting accuracy. The invention can be widely applied to the liquid-level control of medicine, oil, chemical industry, electricity, and food industries.
Description
Technology neck city
The present invention relates to the liquid level of liquid in the storage tank is carried out the noncontact monitoring alarm, is a kind of external-placed type supersonic liquid level monitoring and alarming device.
Background technology
In the liquid level Engineering Control of industries such as medicine, oil, chemical industry, electric power, food, must monitor the liquid level in the storage tank.When the liquid level in the storage tank arrived upper limit or lower limit, liquid level warning equipment need provide caution to this.The plug-in type warning device of present institute widespread usage, must carry out the perforate welding to tank body when mounted, in liquid that contains explosivity, toxicity, corrosivity, high pressure or gas device, this mounting means causes easily reveals danger, there is serious potential safety hazard, can't popularization and application in these fields.The problem that supersonic liquid level monitoring and alarming device brings at plug-in type and given good solution can not cause any destruction to the reservoir surface structure because of installation, has good market development prospect at these special dimensions.
Summary of the invention
The objective of the invention is to overcome above-mentioned applied defect, designed measuring accuracy height, good stability, made things convenient for a kind of external-placed type supersonic liquid level monitoring and alarming device of installation and maintenance.
To achieve these goals; technical scheme of the present invention is to solve like this: be equipped with supersonic liquid level monitoring and alarming device on the wet tank outer wall; its special character is that described liquid level monitoring and alarming device comprises a housing; housing connects the ultrasound emission probe; ultrasonic receiving transducer is placed at wet tank outer wall and ultrasound emission and pops one's head on the same horizontal line; ultrasonic receiving transducer is connected in housing one side by lead-in wire; and finally cause the input end of data processing module; its ultrasound emission probe and ultrasonic receiving transducer are installed in the sucker that is made of permanent magnet; sucker is adsorbed on ultrasound emission probe and ultrasonic receiving transducer on the wet tank outer wall; housing is built-in with data processing module; the ultrasound emission probe links to each other with the signal output port of data processing module; ultrasonic receiving transducer signal is connected with received signal limited amplitude protection device; received signal limited amplitude protection device is connected with receiving signal amplifier; receiving signal amplifier is connected with the received signal wave detector; the received signal wave detector is connected with signal processor; the signal output port of signal processor links to each other with the ultrasound emission probe by the power amplifier driver that transmits; the alarm signal output ends mouth of signal processor links to each other with the panalarm controller; the housing opposite side connects power supply and output signal; output signal can be connected to the control end of acoustic-optic alarm, also can be used as switching value and is connected to controlled device.
The frequency range of described ultrasonic probe is 20K-500KHz, the voltage amplitude that the power amplifier driver (11) that transmits flows to the electric signal of ultrasonic probe (3) is the short-time pulse of 20-300V, duration is the 0.01-3 millisecond, and the pulse signal repetition period is 0.5-5 second.
Described ultrasonic probe is to connect and compose the composite rod structure by transducer and its cavity.
Described external-placed type supersonic liquid level monitoring and alarming device adopts transmitting-receiving two ultrasonic probes separately.
Tank body is not bored a hole, does not get angry, do not damaged to external-placed type supersonic liquid level monitoring and alarming device of the present invention compared with prior art during installation, the installation that can not stop production, install and during work to pot liquid do not produce interferences, do not have leak, pollution-free, do not have and corrode.This device has that structure tube list, installation and maintenance are convenient, applied widely, good reliability, security is good, power is little, accuracy of detection is high, sound and light alarm, characteristics such as easy to use and Long-distance Control can be widely used in the liquid level Engineering Control of industries such as medicine, oil, chemical industry, electric power, food.
Description of drawings
Fig. 1 is the user mode figure of this fluid level controller;
Fig. 2 is this fluid level controller structural representation;
Fig. 3 is Fig. 2 controller A-A cut-open view;
Fig. 4 is the fluid level controller circuit block diagram;
Fig. 5-1,5-2,5-3,5-4,5-5 are the controller circuitry schematic diagram of Fig. 4.
Embodiment
Below in conjunction with accompanying drawing and instantiation content of the present invention is described further:
With reference to Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, a kind of external-placed type supersonic liquid level monitoring and alarming device.On wet tank 5 outer walls, be equipped with supersonic liquid level monitoring and alarming device; its described liquid level monitoring and alarming device comprises a housing 6; its inner storing has data processing module 1; the ultrasound wave output port of data processing module 1 connects ultrasound emission probe 2 by housing 6; ultrasound wave receiving transducer 3 is placed at wet tank 5 outer walls and ultrasound emission and pops one's head on the 2 same horizontal lines; ultrasound wave receiving transducer 3 is by 7 input ports that are connected in housing 6 one sides and finally cause data processing module 1 that go between; its ultrasound emission probe 2 and ultrasound wave receiving transducer 3 are installed in the sucker 4 that is made of permanent magnet; sucker 4 is adsorbed on ultrasound emission probe 2 and ultrasonic receiving transducer 3 on wet tank 5 outer walls; ultrasonic receiving transducer 3 signals are connected with received signal limited amplitude protection device 12; received signal limited amplitude protection device 12 is connected with receiving signal amplifier 13; receiving signal amplifier 13 is connected with received signal wave detector 14; received signal wave detector 14 is connected with signal processor 10; the signal output port of signal processor 10 links to each other with ultrasound emission probe 2 by the power amplifier driver 11 that transmits; the alarm signal output ends mouth of signal processor 10 links to each other with panalarm controller 15; housing 6 opposite sides connect power supply and output signal, and output signal can be connected on the machine calculation machine and store data.
Fig. 5-1,5-2,5-3,5-4,5-5 are the controller circuitry schematic diagram of Fig. 4; corresponding with theory diagram; shown in Figure 4 10 is signal processor unit; 11 are the power amplifier driver element that transmits; 12 is received signal limited amplitude protection unit; 13 is the received signal amplifying unit, and 14 is the received signal detection unit, and 15 is the panalarm control module.The 3rd pin of U1 in the signal processor 10 is parallel with capacitor C 7, C8, and capacitor C 7, the C8 other end are connected with AGND, the 12nd pin parallel resistance R
0, capacitor C
0, resistance R
0Another termination VDD, capacitor C
0Other end ground connection, U1 is C8051F007, be used for to transmit, the control of alerting signal and to received signal sampling, processing.Signal processor 10 links to each other with the power amplifier driver 11 that transmits by output port P0.1, P0.2, and output port P0.1 one end is connected Q
2On, output port P0.2 one end is connected Q
3On, Q
2The other end is connected Q with the 1st pin of diode D3 and transformer primary side
3The other end is connected with the 4th pin of diode D4 and transformer primary side, the reverse connection in series-parallel of diode D3, D4 is connected the two ends of the 1st, 4 pin of transformer primary side, the 2nd, 3 pin of transformer primary side connect a crystal oscillator C13, crystal oscillator C13 other end ground connection, the 5th, 6 pin of Circuit Fault on Secondary Transformer are connected to transmitting probe 2, produce ultrasonic signal.Ultrasonic receiving transducer 3 received ultrasonic signals; link to each other with received signal limited amplitude protection unit 12 simultaneously; received signal limited amplitude protection unit 12 be connected in series backward dioded D5, D6; backward dioded D5, D6 other end ground connection, this unit mainly utilize diode D5, D6 characteristic to carry out amplitude limit, protection to received signal.Received signal limited amplitude protection unit 12 links to each other with received signal amplifying unit 13 again; the received signal amplifying unit 13 1 ends capacitor C 14 that is connected in series successively; resistance R 17; resistance R 17 other ends respectively with resistance R 170 1 ends; operational amplifier U5A the 2nd pin connects; operational amplifier U5A the 8th pin bypass capacitor C 15 that is connected in series; capacitor C 15 other end ground connection; resistance R 18 respectively with resistance R 19 1 ends; operational amplifier U5A the 3rd pin connects; resistance R 19; operational amplifier U5A the 4th pin ground connection, this unit amplifies receiving the signal that comes by operational amplifier U5A.Received signal amplifying unit 13 again with received signal detection unit 14, the pipe of two utmost points in the 1st pin of operational amplifier U5A and the received signal detection unit 14 D7 is connected, the other end of two utmost points, the pipe D7 successively respectively with resistance R 20, capacitor C 16,5 pin of operational amplifier U5B connect, resistance R 20, capacitor C 16,4 pin of operational amplifier U5B, two utmost points pipe D8 is connected with ground, 8 pin of operational amplifier U5B connect power supply, 6,7 pin short circuits, the 7th pin and two utmost points pipe D8, the end of D9 connects, signal after amplifying is carried out detection handle, extract the envelope information of received signal.Received signal detection unit 14 is delivered to this information in the AD converter of signal processor 10, and signal processor 10 is sampled, handled it, judges that according to result the controller present position has no liquid to exist on earth.At last, signal processor 10 is by defeated port P0.3, P0.4, NP0.4 control panalarm controller 15, a resistance R 21 is connected in series on the 1st pin of the chip U4 of control panalarm controller 15, the 2nd pin ground connection, 3,4 pin output switching signals, the 2nd pin node both sides of light emitting diode L3 respectively connect a resistance R 11, R12, the 1st pin of RVG connects a resistance R 11, resistance R 11 port NP0.4 connect, the 3rd pin of RVG connects a resistance R 12, resistance R 12 output port P0.4 connect, and provide sound and light alarm and carry out relay and control.
Its working method is: the CPU in the data processing module provides a driving pulse, after amplifying through power amplifier, is added to the ultrasound emission probe and goes up the emission ultrasonic signal.Ultrasonic signal reflects at tank skin and pot liquid interphase, reaches along whole tank body simultaneously and propagates in medium.Ultrasonic receiving transducer receives this signal; deliver to transmitter after limited amplitude protection, signal amplification, envelope detection are handled; compare through CPU acquisition process in the transmitter again; judge the liquid in storage tank liquid level according to the power of signal and whether reach alarming line; and alerting signal is delivered to controller by the CPU in the transmitter, at last by the controller drives sound and light alarm and carry out relay and control.Its comparison principle is: ultrasound emission and receiving transducer are on the same horizontal line.When there was liquid ultrasonic receiving transducer position, ultrasonic receiving transducer can receive from relative more weak signal of transmitting probe; When ultrasonic receiving transducer position did not have liquid, ultrasonic receiving transducer can receive one from the relative stronger signal of transmitting probe; Certain two kinds of signal demands prestore among the CPU in advance as the comparison standard.
Ultrasonic probe is the composite rod transducer, ultrasound emission probe 2 connects housing 6, this probe front end connects sucker, sucker studs with magnet, ultrasound emission probe 2 is positioned at the housing front end, the data processing module 1 that is attached thereto is positioned at its rear cavity, and ultrasonic receiving transducer 3 is sent into its signal that receives in the data processing module 1.Ultrasonic probe utilizes the magnet on the sucker 4 directly to be adsorbed on storage tank 5 surperficial warning liquid level places during installation, and with estersil or vaseline as the couplant between detecting head surface and the tank skin, writing down warning liquid level place respectively has liquid and does not have the demarcation of popping one's head in of signal value under the liquid two states, probe enters " work " state after demarcating and finishing, and data processing module 1 can be judged according to the fluid level condition of reality.Certainly, transmitting probe and receiving transducer are on the same horizontal line, will be polished with instruments such as wire brush, sand paper, files in the predetermined detection position and clean out the plane of an about 150mm of diameter, requirement should as far as possible smoothly (touch the tangible rough and uneven in surface and burr of nothing with hand).Use acetone (or using other method) to carry out degreasing, purified treatment again, do not have dirt, paint, dust, particle etc. to guarantee this installation composition plane.
The frequency range of ultrasound emission probe 2 is 20K-500KHz, and the electric signal that the power amplifier driver that transmits flows to ultrasonic probe is that voltage amplitude is the short-time pulse of 20-300V, and the duration is the 0.01-3 millisecond, and the pulse signal repetition period is 0.5-5 second.It is applied widely, and fluid to be measured medium, container material and container pressure are not had specific (special) requirements.
Claims (4)
1. external-placed type supersonic liquid level monitoring and alarming device, can be seated on the outer wall of wet tank (5), it is characterized in that described liquid level monitoring and alarming device comprises a housing (6), its inner data processing module (1) of putting, be connected to ultrasound emission probe (2) by housing (6), ultrasonic receiving transducer (3) is seated in wet tank (5) outer wall surface and all is on the same horizontal line with ultrasound emission probe (2), ultrasonic receiving transducer (3) is connected to housing (6) one sides by lead-in wire (7), finally is connected to the signal input port of interior data processing module (1) again; Housing (6) opposite side connects power supply and output switching signal; mounting means is: ultrasound emission probe (2) and ultrasonic receiving transducer (3) are installed in the sucker (4) that is made of permanent magnet; sucker (4) is adsorbed on ultrasound emission probe (2) and ultrasonic receiving transducer (3) on wet tank (5) outer wall; if storage tank (5) does not have ferromagnetic property; at first sucker (4) is fixed on its surface by gluing connecing; probe can be adsorbed on storage tank (5) outside wall surface subsequently; above-mentioned said data processing module (1) comprises by signal processor (10); power amplifier driver (11) transmits; received signal limited amplitude protection device (12); receiving signal amplifier (13); received signal wave detector (14); panalarm controller (15) six most of compositions; the processing logic of data processing module (1) is as follows: ultrasound emission probe (2) links to each other with power amplifier driver (11) output port that transmits in the data processing module (1); ultrasonic receiving transducer (3) is connected with received signal limited amplitude protection device (12); received signal limited amplitude protection device (12) is connected with receiving signal amplifier (13); receiving signal amplifier (13) is connected with received signal wave detector (14); received signal wave detector (14) is connected with signal processor (10); the signal output of signal processor (10) connects the power amplifier driver (11) that transmits, and the alarm signal output ends mouth of signal processor (10) links to each other with panalarm controller (15).
2. according to the described a kind of external-placed type supersonic liquid level monitoring and alarming device of claim 1, the frequency range that it is characterized in that described ultrasonic probe is 20K-500KHz, the voltage amplitude that the power amplifier driver (11) that transmits flows to the electric signal of ultrasonic probe (3) is the short-time pulse of 20-300V, duration is the 0.01-3 millisecond, and the pulse signal repetition period is 0.5-5 second.
3. according to claim 1 or 2 described a kind of external-placed type supersonic liquid level monitoring and alarming devices, it is characterized in that described ultrasonic probe is to connect and compose the composite rod structure by transducer and its cavity.
4. according to the described a kind of external-placed type supersonic liquid level monitoring and alarming device of claim 1, it is characterized in that adopting transmitting-receiving two ultrasonic probes separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101884616A CN101169662A (en) | 2007-12-03 | 2007-12-03 | External-placed type supersonic liquid level monitoring and alarming device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101884616A CN101169662A (en) | 2007-12-03 | 2007-12-03 | External-placed type supersonic liquid level monitoring and alarming device |
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| CN101169662A true CN101169662A (en) | 2008-04-30 |
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|---|---|---|---|
| CNA2007101884616A Pending CN101169662A (en) | 2007-12-03 | 2007-12-03 | External-placed type supersonic liquid level monitoring and alarming device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297715A (en) * | 2011-05-18 | 2011-12-28 | 西安定华电子有限公司 | Self-correcting measurement system and method of outside measurement liquid level switch |
| CN102662414A (en) * | 2011-07-07 | 2012-09-12 | 刘家津 | Mini-type ultrasonic liquid level controller |
| CN102681556A (en) * | 2011-03-15 | 2012-09-19 | 江苏东汇环保科技股份有限公司 | Liquid level control method of steel slag desulfurization agent storage tank |
| CN103454627A (en) * | 2012-05-25 | 2013-12-18 | 罗伯特·博世有限公司 | Electrical circuit for operating transceiver unit, has non-linear two-terminal device, which couples pulse generation unit and resonant circuit, where resonant circuit has inductance and capacitance, which are connected in series |
| CN108689035A (en) * | 2017-04-07 | 2018-10-23 | 罗斯蒙特储罐雷达股份公司 | Radar level gauging equipment |
| CN109240356A (en) * | 2018-09-29 | 2019-01-18 | 深圳市电应普科技有限公司 | A kind of ultrasonic solution LPG cylinder level monitoring scheme and system |
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2007
- 2007-12-03 CN CNA2007101884616A patent/CN101169662A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102681556A (en) * | 2011-03-15 | 2012-09-19 | 江苏东汇环保科技股份有限公司 | Liquid level control method of steel slag desulfurization agent storage tank |
| CN102297715A (en) * | 2011-05-18 | 2011-12-28 | 西安定华电子有限公司 | Self-correcting measurement system and method of outside measurement liquid level switch |
| CN102297715B (en) * | 2011-05-18 | 2012-09-19 | 西安定华电子有限公司 | Self-correcting measurement system and method of outside measurement liquid level switch |
| CN102662414A (en) * | 2011-07-07 | 2012-09-12 | 刘家津 | Mini-type ultrasonic liquid level controller |
| CN103454627A (en) * | 2012-05-25 | 2013-12-18 | 罗伯特·博世有限公司 | Electrical circuit for operating transceiver unit, has non-linear two-terminal device, which couples pulse generation unit and resonant circuit, where resonant circuit has inductance and capacitance, which are connected in series |
| CN103454627B (en) * | 2012-05-25 | 2017-08-08 | 罗伯特·博世有限公司 | The device of fluctuation during active damping for suppressing sonac |
| CN108689035A (en) * | 2017-04-07 | 2018-10-23 | 罗斯蒙特储罐雷达股份公司 | Radar level gauging equipment |
| CN108689035B (en) * | 2017-04-07 | 2022-10-04 | 罗斯蒙特储罐雷达股份公司 | Radar level gauge |
| CN109240356A (en) * | 2018-09-29 | 2019-01-18 | 深圳市电应普科技有限公司 | A kind of ultrasonic solution LPG cylinder level monitoring scheme and system |
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