CN201269768Y - Ultrasonic liquid level measurement and display apparatus for liquid nitrogen tank - Google Patents
Ultrasonic liquid level measurement and display apparatus for liquid nitrogen tank Download PDFInfo
- Publication number
- CN201269768Y CN201269768Y CNU2008201730459U CN200820173045U CN201269768Y CN 201269768 Y CN201269768 Y CN 201269768Y CN U2008201730459 U CNU2008201730459 U CN U2008201730459U CN 200820173045 U CN200820173045 U CN 200820173045U CN 201269768 Y CN201269768 Y CN 201269768Y
- Authority
- CN
- China
- Prior art keywords
- ultrasonic
- liquid
- liquid nitrogen
- circuit
- ultrasound emission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a liquid nitrogen-vat ultrasonic level measuring and displaying device which consists of an ultrasonic transmitting probe, an ultrasonic receiving probe, a level displaying and controlling system, an ultrasonic transmitting circuit, an ultrasonic receiving circuit and an LED, wherein, the ultrasonic transmitting circuit, the ultrasonic receiving circuit and a controlling chip are connected to form the level displaying and controlling system which takes the shape of a bottle stopper and is suitable to be fixed in the center of the opening of the liquid nitrogen vat; the ultrasonic transmitting probe and the ultrasonic receiving probe are under the level displaying and controlling system in parallel; and the LED is positioned above the level displaying and controlling system. The liquid nitrogen-vat ultrasonic level measuring and displaying device has the advantages of convenient installation, no contact, no pollution, high precision, large measuring range, visible result reading and the like, thus being capable of providing better support for the tests and clinical work.
Description
Technical field
The utility model relates to a kind of liquid nitrogen container level gauging display device, relates in particular to a kind of ultrasound wave that utilizes the liquid level of liquid nitrogen container is measured display device, belongs to medicine detector device technical field.
Background technology
Liquid nitrogen is one colourless, odorless, tasteless liquid, and boiling point is-196 ℃, is the most frequently used refrigerant at present, is widely used in clinical medicine domains such as freeze-stored cell and dermatological department, gynaecology, neurosurgery.Liquid nitrogen container is the necessaries of liquid nitrogen storage and transportation, and liquid nitrogen has nature consumption in jar, and therefore making regular check on liquid nitrogen loss is the work that often will do, if jar in 1/3 o'clock of liquid nitrogen off-capacity total volume, should in time replenish liquid nitrogen.Liquid nitrogen capacity inspection method commonly used at present has two kinds, the one, mensuration is got the waddy of a long 80cm, coats black after the peeling, begin to establish a scale from an end then every 5cm, during measurement, with zero graduation down, at the bottom of the liquid nitrogen container mouth is inserted into jar, took out through 5～10 seconds, the length of frosting is the liquid level of jar interior liquid nitrogen, and the method was both dangerous, and reading error is big again; The 2nd, the check weighing method weighed up the weight of slack tank earlier, weighs up the weight when filling with liquid nitrogen again, deducts the weight of slack tank then, promptly gets the general assembly (TW) of jar interior liquid nitrogen, claimed the weight of a liquid nitrogen container later on every 3～5 days, and that this method exists is time-consuming, the drawback of effort.
Summary of the invention
At the deficiencies in the prior art, problem to be solved in the utility model is, a kind of novel liquid nitrogen container ultrasonic liquid-level measurement display device is provided, and it can detect the height of liquid nitrogen liquid level in the liquid nitrogen container sensitive, quickly and accurately, and shows in real time.
Liquid nitrogen container ultrasonic liquid-level measurement display device of the present utility model, form by ultrasound emission probe, ultrasonic receiving transducer, liquid level display control program, ultrasound emission circuit, ultrasonic receiving circuit, LCD, it is characterized in that, described liquid level display control program is connected and composed by ultrasound emission circuit, ultrasonic receiving circuit, control chip, its profile is the bottle stopper shape, and is suitable for vertical fixing in liquid nitrogen container mouth central authorities; Described ultrasound emission probe and ultrasonic receiving transducer are positioned at the below of liquid level display control program side by side; Described LCD is positioned at the top of liquid level display control program; Wherein: the input end of described ultrasound emission probe connects the N1 N2 of liquid level display control program ultrasound emission circuit and the output terminal of N5 N6, and the output terminal of ultrasonic receiving transducer connects the ultrasonic receiving circuit OP1 of liquid level display control program amp.in; Described control chip is 51 single-chip microcomputers, and the P1.0 mouth of single-chip microcomputer connects the input end of ultrasound emission circuit, and single-chip microcomputer external interrupt 0 connects the output terminal of ultrasound wave receiving circuit part, and single-chip microcomputer P0.0 interface connects LCD.
In the above-mentioned liquid nitrogen container ultrasonic liquid-level measurement display device, described ultrasound emission circuit mainly is made up of the TTL not circuit, it is 250 μ s by external pin P1.0 output pulse width, carrier wave is the pulse train of 10 pulses of 40kHz, from the common input end input of N1 N2 N3 N4, be added to enforcement emission on the ultrasonic transducer to recommend drive form.In order to improve the interference free performance of system, two phase inverters are in juxtaposition use to increase drive current.The output terminal of the output terminal of N1 N2 and N5 N6 is 180 ° of phasic differences mutually just, and the square wave that phase place is opposite is superimposed and is added to two input ends of ultrasound emission probe, promptly forms and recommends drive form.
In the above-mentioned liquid nitrogen container ultrasonic liquid-level measurement display device, described ultrasonic receiving circuit is a core with the single-shot trigger circuit that NE555 forms, the 40KHz ultrasonic signal that receives is by receiving the electric impulse signal that ultrasonic transducer becomes 40KHz, after the anti-phase amplification of this signal process OP1 amplifier, trigger pip as monostable circuit, be input to triggering input end 22 pin of NE555, make positive pulse of monostable output terminal 23 pin output, the width of this pulse is by R3 and C3 decision, pulse width is 1.1 * R3 * C3, component parameters calculating according to this circuit diagram the inside can be 11ms, forming width after the paraphase of this positive pulse process N7 phase inverter is the negative pulse of 11ms, directly deliver to the external interrupt 0 of single-chip microcomputer, trigger interrupt response with its negative edge.
In the above-mentioned liquid nitrogen container ultrasonic liquid-level measurement display device, described LCD is a standard character dot lcd display module, and inside has the video data buffer zone.
In the above-mentioned liquid nitrogen container ultrasonic liquid-level measurement display device, described control chip is 51 single-chip microcomputers, and the P1.0 mouth of single-chip microcomputer is received the input end of radiating circuit, and the external interrupt 0 of single-chip microcomputer connects the output of ultrasound wave receiving circuit part.In the single chip microcomputers transmit pulse train, start inner timer and begin regularly, till external interrupt receives look-at-me, be exactly the time that ultrasound wave is aloft propagated during this period of time.
Wherein, described single-chip microcomputer is after recording ultrasonic propagation time, and its time is directly proportional with the distance of popping one's head in to testee.Electronic unit detects this time, can record liquid level according to this time and the aerial velocity of propagation of ultrasound wave.Come out by liquid crystal display displays.
In the above-mentioned liquid nitrogen container ultrasonic liquid-level measurement display device, described ultrasound emission probe is launched the ultrasonic signal that frequency is 30KHz～40KHz.The detection range of described ultrasonic receiving transducer is 1mm～20m.
The excellent results of liquid nitrogen container ultrasonic liquid-level measurement display device described in the utility model is, that described measurement display device has is easy for installation, noncontact, pollution-free, precision is high, range ability is big, the result reads advantages such as directly perceived, can detect the height of liquid level in the liquid nitrogen container accurately, rapidly and sensitively, be convenient to the quick and liquid level data of obtaining liquid nitrogen of safety of medical worker and scientific research personnel, can better provide support for experiment and clinical position.
Description of drawings
Fig. 1 is the structural representation of liquid nitrogen container ultrasonic liquid-level measurement display device described in the utility model.
Wherein: 1 refers to the ultrasound emission probe, and 2 refer to the liquid level display control program, and 3 refer to LCD, and 4 refer to ultrasonic receiving transducer, and 5 refer to liquid nitrogen container.
Fig. 2 is a liquid level display control program circuit diagram.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
With reference to Fig. 1, liquid nitrogen container ultrasonic liquid-level measurement display device of the present utility model is made up of ultrasound emission probe 1, liquid level display control program 2, LCD 3, ultrasonic receiving transducer 4, liquid nitrogen container 5, wherein: described liquid level display control program 2 is connected and composed by ultrasound emission circuit, ultrasonic receiving circuit, control chip, its profile is bottle stopper shape (reverse frustoconic), and is suitable for vertical fixing in 5 mouthfuls of liquid nitrogen containers (round platform middle part diameter equals liquid nitrogen container mouth internal diameter) central authorities; Described ultrasound emission probe 1 and ultrasonic receiving transducer 4 are positioned at the below of liquid level display control program 2 side by side, and LCD 3 is positioned at the top of liquid level display control program 2; In the described liquid level display control program 2: the ultrasound emission circuit is made up of the TTL not circuit; Ultrasonic receiving circuit is a core with the single-shot trigger circuit that NE555 forms; Control chip is 51 single-chip microcomputers, and the P1.0 mouth of single-chip microcomputer connects the input end of radiating circuit, and single-chip microcomputer external interrupt 0 connects the output terminal of ultrasound wave receiving circuit part, and single-chip microcomputer P0.0 interface connects LCD; The input end of described ultrasound emission probe 1 links to each other with the N1 N2 of liquid level display control program 2 ultrasound emission circuit and the output terminal of N5 N6, and the output terminal of ultrasonic receiving transducer 4 links to each other with liquid level display control program 2 ultrasonic receiving circuit OP1 amp.ins; The single chip microcomputers transmit pulse train of described liquid level display control program 2, the P1.0 mouth of single-chip microcomputer is received the input end of radiating circuit, the ultrasound emission circuit is added to pulse signal on the emission ultrasonic transducer to recommend drive form, and ultrasound emission 1 transmission frequency of popping one's head in is the ultrasonic signal of 40KHz.Simultaneously, control chip starts inner timer and begins timing; Described ultrasonic receiving transducer 4 receives the 40KHz reflection echo and is converted to the electric impulse signal of 40KHz, and forming width behind this signal process OP1 amplifier is the negative pulse of 11ms, directly delivers to the external interrupt 0 of single-chip microcomputer, triggers interrupt response with its negative edge.Till control chip receives look-at-me, be exactly the time that ultrasound wave is aloft propagated during this period of time; Described control chip is after recording ultrasonic propagation time, because of its time is directly proportional with the distance of popping one's head in to testee.Electronic unit detects this time, promptly records liquid level according to this time and the aerial velocity of propagation of ultrasound wave.Show by LCD 3.
Above-mentioned LCD adopts LC0811, and it is a standard character dot lcd display module, and inside has the video data buffer zone.
With reference to Fig. 2, the ultrasound emission circuit mainly is made up of the TTL not circuit, by external pin P1.0 output pulse width is 250 μ s, carrier wave is the pulse train of 10 pulses of 40kHz, from the input of the common input end of N1 N2 N3 N4, be added to ultrasonic transducer and launch to recommend drive form.In order to improve the interference free performance of system, two phase inverters are in juxtaposition use to increase drive current.The output terminal of the output terminal of N1 N2 and N5 N6 is 180 ° of phasic differences mutually just, and the square wave that phase place is opposite is superimposed and is added to two input ends of ultrasound emission probe, promptly forms and recommends drive form.
With reference to Fig. 2, ultrasonic receiving circuit is a core with the single-shot trigger circuit that NE555 forms, the 40KHz ultrasonic signal that receives is by receiving the electric impulse signal that ultrasonic transducer becomes 40KHz, after the anti-phase amplification of this signal process OP1 amplifier, trigger pip as monostable circuit, be input to triggering input end 22 pin of NE555, make positive pulse of monostable output terminal 23 pin output, the width of this pulse is by R3 and C3 decision, pulse width is 1.1 * R3 * C3, component parameters calculating according to this circuit diagram the inside can be 11ms, forming width after the paraphase of this positive pulse process N7 phase inverter is the negative pulse of 11ms, directly deliver to the external interrupt 0 of single-chip microcomputer, trigger interrupt response with its negative edge.
With reference to Fig. 1, utilize liquid nitrogen container ultrasonic liquid-level measurement display device of the present utility model to carry out the experiment of liquid nitrogen Level Detection:
Inject liquid nitrogen in the liquid nitrogen container, cover capping plug as early as possible, every 3～5 days liquid nitrogen container ultrasonic liquid-level measurement display device plug (is about to its vertical fixing in liquid nitrogen container mouth central authorities) on the liquid nitrogen container mouth later on.The control chip emission pulse train of liquid level display control program 2, the P1.0 mouth of control chip is received the input end of radiating circuit, the ultrasound emission circuit is added to pulse signal on the ultrasonic transducer to recommend drive form, and ultrasound emission probe 1 a branch of frequency of liquid nitrogen surface emitting in liquid nitrogen container is the ultrasonic signal of 40KHz.Simultaneously, control chip starts inner timer and begins timing.Sound wave is by the liquid nitrogen surface reflection, the partial reflection echo is received and is converted to the electric impulse signal of 40KHz by ultrasonic receiving transducer 4, forming width behind this signal process OP1 amplifier is the negative pulse of 11ms, directly delivers to the external interrupt 0 of control chip, triggers interrupt response with its negative edge.Till control chip receives look-at-me, be exactly the time that ultrasound wave is aloft propagated during this period of time; Control chip is after recording ultrasonic propagation time, because of its time is directly proportional with the distance of popping one's head in to testee.Electronic unit detects this time, and computing promptly records the liquid nitrogen liquid level through single-chip microcomputer according to the aerial velocity of propagation of this time and ultrasound wave.Show by LCD 3.
The ultrasound emission probe is launched the ultrasonic signal that frequency is 40KHz in the above-mentioned experiment.The detection range of ultrasonic receiving transducer is 1 millimeter～20 meters.
Claims (5)
1. liquid nitrogen container ultrasonic liquid-level measurement display device, form by ultrasound emission probe, ultrasonic receiving transducer, liquid level display control program, ultrasound emission circuit, ultrasonic receiving circuit, LCD, it is characterized in that, described liquid level display control program is connected and composed by ultrasound emission circuit, ultrasonic receiving circuit, control chip, its profile is the bottle stopper shape, and is suitable for vertical fixing in liquid nitrogen container mouth central authorities; Described ultrasound emission probe and ultrasonic receiving transducer are positioned at the below of liquid level display control program side by side; Described LCD is positioned at the top of liquid level display control program; Wherein: the input end of described ultrasound emission probe connects the N1 N2 of liquid level display control program ultrasound emission circuit and the output terminal of N5 N6, and the output terminal of ultrasonic receiving transducer connects the ultrasonic receiving circuit OP1 of liquid level display control program amp.in; Described control chip is 51 single-chip microcomputers, and the P1.0 mouth of single-chip microcomputer connects the input end of ultrasound emission circuit, and single-chip microcomputer external interrupt 0 connects the output terminal of ultrasound wave receiving circuit part, and single-chip microcomputer P0.0 interface connects LCD.
2. liquid nitrogen container ultrasonic liquid-level measurement display device according to claim 1 is characterized in that described ultrasound emission circuit is made up of the TTL not circuit; Described ultrasonic receiving circuit is a core with the single-shot trigger circuit that NE555 forms.
3. liquid nitrogen container ultrasonic liquid-level measurement display device according to claim 1 is characterized in that described LCD is a standard character dot lcd display module, and inside has the video data buffer zone.
4. liquid nitrogen container ultrasonic liquid-level measurement display device according to claim 1 is characterized in that, described ultrasound emission probe is launched the ultrasonic signal that frequency is 30KHz～40KHz.
5. liquid nitrogen container ultrasonic liquid-level measurement display device according to claim 1 is characterized in that the detection range of described ultrasonic receiving transducer is 1mm～20m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201730459U CN201269768Y (en) | 2008-10-13 | 2008-10-13 | Ultrasonic liquid level measurement and display apparatus for liquid nitrogen tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201730459U CN201269768Y (en) | 2008-10-13 | 2008-10-13 | Ultrasonic liquid level measurement and display apparatus for liquid nitrogen tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201269768Y true CN201269768Y (en) | 2009-07-08 |
Family
ID=40842375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201730459U Expired - Fee Related CN201269768Y (en) | 2008-10-13 | 2008-10-13 | Ultrasonic liquid level measurement and display apparatus for liquid nitrogen tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201269768Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102240629A (en) * | 2010-05-10 | 2011-11-16 | 勃兰特边角技术有限公司 | Adhesive supply device |
| CN105181083A (en) * | 2015-07-16 | 2015-12-23 | 无锡市崇安区科技创业服务中心 | Liquid level monitoring system of liquid nitrogen filling device |
| CN107697461A (en) * | 2017-09-22 | 2018-02-16 | 武汉互创联合科技有限公司 | A kind of intelligent liquid nitrogen can system |
| CN109374090A (en) * | 2018-10-23 | 2019-02-22 | 西南交通大学 | A kind of level monitoring system based on ultrasound |
| CN109498855A (en) * | 2018-12-27 | 2019-03-22 | 中国人民解放军第二军医大学 | A kind of drainage bag liquid level monitoring and alarming device |
| WO2020042401A1 (en) * | 2018-08-31 | 2020-03-05 | 武汉互创联合科技有限公司 | Intelligent liquid nitrogen tank device |
| CN111426544A (en) * | 2020-03-24 | 2020-07-17 | 中冶长天国际工程有限责任公司 | Method and system for controlling liquid nitrogen setting time |
| CN111720735A (en) * | 2020-06-29 | 2020-09-29 | 重庆市柏玮熠科技有限公司 | IVF liquid nitrogen container temperature monitoring system |
-
2008
- 2008-10-13 CN CNU2008201730459U patent/CN201269768Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102240629A (en) * | 2010-05-10 | 2011-11-16 | 勃兰特边角技术有限公司 | Adhesive supply device |
| CN105181083A (en) * | 2015-07-16 | 2015-12-23 | 无锡市崇安区科技创业服务中心 | Liquid level monitoring system of liquid nitrogen filling device |
| CN107697461A (en) * | 2017-09-22 | 2018-02-16 | 武汉互创联合科技有限公司 | A kind of intelligent liquid nitrogen can system |
| WO2020042401A1 (en) * | 2018-08-31 | 2020-03-05 | 武汉互创联合科技有限公司 | Intelligent liquid nitrogen tank device |
| CN109374090A (en) * | 2018-10-23 | 2019-02-22 | 西南交通大学 | A kind of level monitoring system based on ultrasound |
| CN109498855A (en) * | 2018-12-27 | 2019-03-22 | 中国人民解放军第二军医大学 | A kind of drainage bag liquid level monitoring and alarming device |
| CN111426544A (en) * | 2020-03-24 | 2020-07-17 | 中冶长天国际工程有限责任公司 | Method and system for controlling liquid nitrogen setting time |
| CN111426544B (en) * | 2020-03-24 | 2023-04-28 | 中冶长天国际工程有限责任公司 | Control method and system for liquid nitrogen setting time |
| CN111720735A (en) * | 2020-06-29 | 2020-09-29 | 重庆市柏玮熠科技有限公司 | IVF liquid nitrogen container temperature monitoring system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201269768Y (en) | Ultrasonic liquid level measurement and display apparatus for liquid nitrogen tank | |
| CN102109333B (en) | Small-curvature radius complex curved surface intelligent ultrasonic thickness measurement system | |
| GB1411223A (en) | Apparatus and method for measuring the level of the contents of a container | |
| EP2751532B1 (en) | Calibration of a level gauge system | |
| CN207180630U (en) | A kind of Ultrasonic Intelligent measuring thickness device | |
| CN202133386U (en) | Ultrasonic thickness meter | |
| CN105435337A (en) | Method and system for detecting liquid parameters | |
| CN105181068A (en) | Liquid volume measuring device based on ultrasonic wave, liquid volume measuring method and monitoring method | |
| CN105300508A (en) | Double-threshold detection circuit of ultrasonic wave signal propagation time, and detection method | |
| CN107167219A (en) | A kind of self-alignment outer patch ultrasonic liquid level switch measuring system and its measuring method | |
| CN103487507A (en) | Detection method and detection device for food safety by use of supersonic wave | |
| CN205983876U (en) | Dangerous goods transport vehicle anti -collision warning device | |
| CN105319266A (en) | Ultrasonic liquid concentration phase-sensitive detecting method and device | |
| CN203037314U (en) | Ultrasonic wave liquid level measurement device | |
| CN206095360U (en) | Liquid level's device among measurement liquid nitrogen container | |
| CN204807054U (en) | Ultrasonic thickness meter | |
| CN203224419U (en) | Liquid density instrument | |
| CN105043311A (en) | Ultrasonic thickness gauge | |
| CN204788285U (en) | Ultrasonic thickness gauge | |
| CN208847622U (en) | A kind of blood coagulation condition checkout gear | |
| CN111189555A (en) | Biological body surface temperature measuring system, method and device based on ultrasonic waves | |
| CN208937143U (en) | Tank body and its contactless liquid level emasuring device | |
| JPH0666775A (en) | Measuring instrument for sugar content of drink in sealed container | |
| CN207232088U (en) | A kind of container corrosion detection device | |
| CN202534185U (en) | Echo sounding simulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090708 Termination date: 20091113 |