CN206710382U - A kind of oxygenerator oxygen concentration detection sensor - Google Patents
A kind of oxygenerator oxygen concentration detection sensor Download PDFInfo
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- CN206710382U CN206710382U CN201720170364.3U CN201720170364U CN206710382U CN 206710382 U CN206710382 U CN 206710382U CN 201720170364 U CN201720170364 U CN 201720170364U CN 206710382 U CN206710382 U CN 206710382U
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Abstract
The utility model belongs to medical oxygen generator lambda sensor technical field, more particularly to a kind of oxygenerator oxygen concentration detection sensor, including upper sensor, lower sensor, becket, upper sensor, lower sensor is symmetricly set on becket both sides up and down, upper sensor, lower sensor, becket is concentric, and upper sensor, lower sensor and metal ring combined face flat smooth, upper sensor, lower sensor will be closed into a cylindrical cavity at becket, becket ring body is provided with the air inlet for making cavity inside and ft connection, gas outlet, it is simple in construction, it is safe, cost is low, it is low in energy consumption, efficiency high, detection is accurate.
Description
Technical field
The utility model belongs to medical oxygen generator lambda sensor technical field, and in particular to a kind of oxygenerator oxygen concentration detection
Sensor.
Background technology
With the development and the improvement of people's living standards of science and technology, oxygenerator is widely used in medical treatment and healthcare industry.
Particularly portable domestic oxygenerator is more and more common.Therefore, the monitoring precision to oxygen concentration in oxygenerator and reliability,
Security requirement more and more higher.
At present in the method for detection oxygen concentration, there are many methods to may detect that oxygen concentration, such as electrochemistry, paramagnetic
Oxygen, zirconium oxide method and ultrasonic flow Concentration Testing method.But mainly there are zirconium oxide and supercritical ultrasonics technology for oxygenerator industry.
Zirconium oxide oximetry advantage is the influence of not examined gas temperature, can be detected by using different mozzles
Oxygen content in various temperature gas, this flexibility are used on many industrial on-line checkings.Its shortcoming is the reaction time
Slowly, it is complicated, easily influence accuracy of detection；Heater is typically heated with electric furnace heating wire, and the life-span is not grown.Need often to calibrate, zirconium
Battery is frequently necessary to change, and is all a burden for user and producer, it is impossible to complete continuous monitoring, pass through by-pass shunt, arteries and veins
Rush formula monitoring.
Ultrasonic wave concentration principle：In pipeline under the component full of binary gas, ultrasonic pulse is propagated through fluid, two kinds
The concentration ratio of component is different, and spread speed of the ultrasonic pulse in gas is also different.By measuring parameters,acoustic can with regard to energy
Detect the concentration of oxygen.Pulse time difference method is the conventional method for detecting the velocity of sound, but measurement accuracy is not high enough, it is impossible to
Meet the requirement of detection gas micro-concentrations.In order to solve this problem, the method that general producer uses is with two pairs of transmitting-receivings point
The ultrasonic probe of body, is placed in pure air for a pair, the spacing of sensor and another receipts being opposite under test gas
It is the same to send out sensor spacing, when same pumping signal acts on two transmitting probes, two receive the phase received between signal of popping one's head in
Potential difference can change, and the conformity calculation through oversampling circuit, draw gas concentration.It is high to receive and dispatch split sensor probe cost, rear road electricity
Line structure is complicated, is unsatisfactory for existing low cost, the requirement that low-power consumption is environmentally friendly, safe and simple.
Utility model content
Technical problem to be solved in the utility model is to be directed to drawbacks described above, there is provided a kind of oxygenerator oxygen concentration detection passes
Sensor, it is simple in construction, safe, cost is low, low in energy consumption, efficiency high, detection are accurate.
The technical scheme that the utility model solves the use of its technical problem is as follows：
A kind of oxygenerator oxygen concentration detection sensor, including upper sensor, lower sensor, becket, top sensing
Device, lower sensor are symmetricly set on becket both sides up and down, and upper sensor, lower sensor, becket are concentric, and on
Portion's sensor, lower sensor and metal ring combined face flat smooth, upper sensor, lower sensor will be closed at becket
Into a cylindrical cavity, becket ring body is provided with air inlet, the gas outlet for making cavity inside and ft connection.
Upper sensor, lower sensor one are emission type, and another is reception type, and under test gas is entered by air inlet
Into cavity, emission type sensor sends ultrasonic wave and received through the gas in cavity by reception type sensor, by with sensor
The external circuit of connection carries out the calculating comparison processing of phase difference, obtains testing result, reflection probe and receiving transducer are passed through
Structural integrity connects as one, and reduces the use number of probe, saves cost, meanwhile, integrative-structure is simple, it is not necessary to will
Detection sensor is placed under test gas, safer, and air inlet, gas outlet coordinate, and can detect in time, the knot of display detection in time
Fruit, the efficiency high of detection and detection is accurate.
Further, described upper sensor is that U-shaped upper body, upper piezoelectric ceramic piece are formed by longitudinal section, on
The bottom of portion's housing is be bonded by glue with becket top end face, and upper piezoelectric ceramic piece is bonded in inside upper body by glue
Bottom face, upper piezoelectric ceramic piece and upper body are concentric, and upper piezoelectric ceramic piece the two poles of the earth are equipped with the upper lead to stretch out, on
Portion's enclosure interior is by silica gel, and described lower sensor is by lower case of the longitudinal section for inverted U, lower piezoelectric potsherd
Form, the top of lower case is be bonded by glue with becket bottom face, and lower piezoelectric potsherd is bonded in bottom by glue
Enclosure interior top end face, lower piezoelectric potsherd and lower case are concentric, and lower piezoelectric potsherd the two poles of the earth are equipped with what is stretched out
Lower lead, by silica gel inside lower case, upper body, the structure and size of lower case are identical, upper piezoelectric ceramics
Piece, the specifications parameter of lower piezoelectric potsherd are consistent.
Further, described upper body, the material of lower case are aluminium or stainless steel, upper body, lower case
The external diameter of body is 12-25mm, and side thickness 3-6mm, upper body base thickness is 0.4-1.2mm, and lower case top thickness is 0.4-
1.2mm。
Further, described becket external diameter is consistent with upper sensor external diameter, and becket internal diameter is smaller 3- than external diameter
5mm, becket are highly 3-6mm.
Further, a kind of oxygenerator oxygen concentration detection sensor according to claim 4, it is characterised in that：Institute
The material for the becket stated is stainless steel or aluminium.
Further, ceramics external diameter/upper case internal diameter of described upper piezoelectric ceramic piece is 0.3-0.5, upper piezoelectricity pottery
The ceramics thickness of ceramics/upper case shell base thickness degree is 0.5-1.
Further, described upper sensor, the working frequency of lower sensor are 20-40KHz.
Further, described upper sensor is reception type sensor, and lower sensor is emission type sensor
The beneficial effects of the utility model are：Using such scheme, using the structure of piezoelectric type transceiver, reflection is visited
Head connected as one with receiving transducer by structural integrity, it is simple in construction, safe, cost is low, low in energy consumption, efficiency high, inspection
Survey accurate.
Brief description of the drawings
By detailed description below in conjunction with the accompanying drawings, the foregoing and other objects, features and advantages of the utility model will
Become apparent.
Fig. 1 is the utility model schematic cross-section.
Fig. 2 is test resonance curve and phase diagram of the present utility model.
Wherein：1 is becket, and 1.1 be air inlet, and 1.2 be gas outlet, and 2 be upper body, and 3 be upper piezoelectric ceramic piece, 4
It is cavity for upper lead, 5,6 be silica gel, and 7 be lower case, and 8 be lower piezoelectric potsherd, and 9 be lower lead.
Embodiment
The utility model is described further below in conjunction with the accompanying drawings.
Embodiment 1：Shown in reference picture, Fig. 2, a kind of oxygenerator oxygen concentration detection sensor, including upper sensor, bottom
Sensor, becket 1, upper sensor, lower sensor are symmetricly set on the both sides up and down of becket 1, and upper sensor,
Lower sensor, becket 1 are concentric, and upper sensor is U-shaped aluminum upper body 2, upper piezoelectric ceramic piece 3 by longitudinal section
Form, the bottom of upper body 2 and the top end face of becket 1 are be bonded by glue, and upper piezoelectric ceramic piece 3 is bonded in by glue
The inner bottom end face of portion's housing 1, upper piezoelectric ceramic piece 3 and upper body 1 are concentric, and the two poles of the earth of upper piezoelectric ceramic piece 3 are equipped with
The upper lead 4 to stretch out, the inside of upper body 2 carry out embedding by silica gel 6, and glue bonding is easy to assemble, can promoted
Improve assembling precision, in addition, glue bonding the influence of testing result will can be reduced to it is minimum, promote improve detection essence
To spend, embedding silica gel 6 can protect the silver layer of piezoelectric ceramic piece 3 to increase the service life not by environmental oxidation in aluminum hull, also,
The bonding strength of lead 4 and upper piezoelectric ceramic piece 3 can be improved, improves the pulling capacity of lead solder-joint, upper sensor is to connect
Receipts type sensor.
Lower sensor by longitudinal section is the lower case 7 of inverted U, lower piezoelectric potsherd 8 is formed, the top of lower case 7
End is be bonded by glue with the bottom face of becket 1, and the inside that lower piezoelectric potsherd 8 is bonded in lower case 7 by glue is pushed up
End face, lower piezoelectric potsherd 8 and lower case 7 are concentric, and the two poles of the earth of lower piezoelectric potsherd 8 are equipped with the lower lead to stretch out
9, again by the embedding of silica gel 6, the bottom face of upper body 2, the top end face and and metal of lower case 7 inside lower case 7
The upper and lower ends face of ring 1 is bright and clean burnishing surface, i.e., upper body 2, lower case 7 and the faying face of becket 1 are bright and clean smooth,
Remained at cemented surface without glue, be easy to assemble, moreover it is possible to eliminated detection error, can promote to improve detection precision, lower case 7
Material be all aluminum hull, silica gel 6 is filled in aluminum hull, can protect the silver layer of lower piezoelectric potsherd 8 not by environmental disruption and oxidation,
In addition it is possible to reinforce lower lead 9, the pulling capacity of lead solder-joint is improved, and then improve the reliability of product.
Upper body 2, the structure and size of lower case 7 are identical, detection angle of radiation to sensor of the size of shell and
Frequency important, the present embodiment middle and upper part housing 2, the external diameter of lower case 7 are 12mm, upper body 2, lower case
The survey wall thickness of body 7 is 3mm, and it is 0.4mm that the bottom thickness of upper body 2 is consistent with the tip thickness of lower case 7, control sensing
The detection angle of device is 0-10 °, and detection angle promotes to improve accuracy of detection, upper piezoelectric ceramic piece 3, pushed close to detection direction
The specifications parameter of electroceramics piece 8 is consistent, and upper piezoelectric ceramic piece 3, the external diameter of lower piezoelectric potsherd 8 are 3mm, the thickness of piezoelectric ceramic piece
Spend for 0.4mm, the base thickness of upper body 2 is suitable, and it is ultrasonic range to make with the frequency of cavity resonance, makes the working frequency of this detection
For 25KHz, the external diameter of becket 1 is consistent with the external diameter of upper body 2, and the internal diameter of becket 1 is smaller 3mm than external diameter, the height of becket 1
Spend and be provided with for 3mm, the cavity 5 of upper body 2, lower case 7 by closing at becket 1 into a cylindrical type, the ring body of becket 1
Make the inside of cavity 5 and air inlet 1.1, the gas outlet 1.2 of ft connection, becket 1 uses aluminium material, corrosion-resistant with longer
Service life, it is identical with the material of upper body 2, lower case 7, the error brought in material is avoided, improves testing result, it is empty
Chamber 5 is resonant cavity, and in the detection, its resonant frequency can produce interference to the super refreshing ripple signal of detection, therefore, it is dry eliminate this
Relate to, because the frequency of, resonant cavity is as the internal diameter of middle part becket increases and reduces, upper sensor or lower sensor
Own frequency with piezoelectric ceramics thickness and upper and lower metal shell base thickness increase and increase, with the diameter of piezoelectric ceramics, on
The increase of the external diameter of lower metal shell and reduce, therefore by each to becket dimensional structure, upper sensor, lower sensor
The optimization of part dimension structure limits, and can play a part of eliminating and interfere, the dimensional structure of becket 1 is set in the present embodiment
Rationally, such dimensional structure can be separated by frequency of the frequency of resonant cavity with upper sensor or lower sensor in itself
Farther out, it can so avoid producing signal interference, improve the precision of detection, under test gas enters cavity 5 by air inlet 1.1
Interior, upper lead 4, lower lead 9 access external circuit, and external circuit includes processor, radiating circuit, conversion switch, signal
Amplifying circuit, signal modulation circuit and display circuit etc., lower lead 9 connect radiating circuit, processor control radiating circuit transmitting
Pulse, pulse make upper sensor send ultrasonic wave by conversion switch, and ultrasonic wave is connect through cavity by upper sensor
Receive, processing is compared by processor after being modulated after signal amplification circuit acts on by signal modulation circuit, processor again will place
Data after reason are shown through display circuit.
The structure of this detection sensor is very simple, without infiltrating in detection gas environment, need to only lead to detection gas
The air inlet 1.1 for crossing becket 1 imports, gas outlet 1.2 exports, and continual measurement can be achieved, can show timely air matter
Amount, oxygen concentration detects suitable for medical oxygen generator, and detectable concentration scope is 70-97%, it can also be used to other binary gas
Concentration Testing field, detection efficiency is high, and measurement is accurate.Size sensor presses above-mentioned requirements, obtains the detection of this oxygenerator oxygen concentration
Sensitivity at sensor resonant frequency point is more than>0.01 (output voltage/lower sensor of sensitivity=upper sensor
Input voltage), illustrate, the testing result of this oxygenerator oxygen concentration detection sensor is precisely reliable.And compare existing detection
Method, the structure of sensor are integrated, and reduce the usage quantity of sensor, reduce power consumption, and integral structure
It is more safe, save cost.
Embodiment 2：Shown in reference picture, Fig. 2, a kind of oxygenerator oxygen concentration detection sensor, including upper sensor, bottom
Sensor, becket 1, upper sensor, lower sensor are symmetricly set on the both sides up and down of becket 1, and upper sensor,
Lower sensor, becket 1 are concentric, upper body 2, upper pressure of the upper sensor by longitudinal section for U-shaped stainless steel
Electroceramics piece 3 is formed, and the bottom of upper body 2 and the top end face of becket 1 are be bonded by glue, and upper piezoelectric ceramic piece 3 passes through glue
Water is bonded in the inner bottom end face of upper body 1, and upper piezoelectric ceramic piece 3 and upper body 1 are concentric, upper piezoelectric ceramic piece 3
The two poles of the earth are equipped with the upper lead 4 to stretch out, and the inside of upper body 2 carries out embedding by silica gel 6, and glue bonding is easy to fill
Match somebody with somebody, can promote to improve the precision assembled, in addition, glue bonding will can be reduced to minimum to the influence of testing result, promote
Accuracy of detection is improved, embedding silica gel 6 can protect the silver layer of piezoelectric ceramic piece 3 to extend and use not by environmental oxidation in aluminum hull
In the life-span, further, it is possible to improve the bonding strength of lead 4 and upper piezoelectric ceramic piece 3, improve the pulling capacity of lead solder-joint, top
Sensor is reception type sensor.
Lower sensor by longitudinal section is the lower case 7 of stainless steel of inverted U, lower piezoelectric potsherd 8 is formed, under
The top of portion's housing 7 is be bonded by glue with the bottom face of becket 1, and lower piezoelectric potsherd 8 is bonded in lower case by glue
The inner tip face of body 7, lower piezoelectric potsherd 8 and lower case 7 are concentric, and the two poles of the earth of lower piezoelectric potsherd 8 are equipped with outwards
The lower lead 9 of extension, again by the embedding of silica gel 6, the bottom face of upper body 2, the top of lower case 7 inside lower case 7
Face and be bright and clean burnishing surface with the upper and lower ends face of becket 1, i.e. upper body 2, lower case 7 and the knot of becket 1
Conjunction face is bright and clean smooth, is remained at cemented surface without glue, is easy to assemble, moreover it is possible to eliminates detection error, can promote to improve detection essence
Accuracy, the material of lower case 7 is all aluminum hull, and silica gel 6 is filled in aluminum hull, can protect the silver layer of lower piezoelectric potsherd 8 not by
Environmental disruption and oxidation, in addition it is possible to reinforce lower lead 9, the pulling capacity of lead solder-joint is improved, and then improve the reliable of product
Property.
Upper body 2, the structure and size of lower case 7 are identical, detection angle of radiation to sensor of the size of shell and
Frequency important, the present embodiment middle and upper part housing 2, the external diameter of lower case 7 are 25mm, upper body 2, lower case
The survey wall thickness of body 7 is 6mm, and it is 1.2mm that the bottom thickness of upper body 2 is consistent with the tip thickness of lower case 7, control sensing
The detection angle of device is 0-10 °, and detection angle promotes to improve accuracy of detection, upper piezoelectric ceramic piece 3, pushed close to detection direction
The specifications parameter of electroceramics piece 8 is consistent, and upper piezoelectric ceramic piece 3, the external diameter of lower piezoelectric potsherd 8 are 3.9mm, piezoelectric ceramic piece
Thickness is 0.6mm, and the base thickness of upper body 2 is suitable, and it is acceptable value to make with the frequency of cavity resonance, makes the work frequency of this detection
Rate is 30KHz, and the external diameter of becket 1 is consistent with the external diameter of upper body 2, and the internal diameter of becket 1 is smaller 5mm than external diameter, becket 1
Highly it is 6mm, the cavity 5 of upper body 2, lower case 7 by closing at becket 1 into a cylindrical type, sets in the ring body of becket 1
There are the air inlet 1.1 for making the inside of cavity 5 with ft connection, gas outlet 1.2, the material of becket 1 is stainless steel, with upper lower casing
Body material is consistent, promote eliminate error, promote detection it is more accurate, cavity 5 is resonant cavity, in the detection, its resonant frequency
Interference can be produced to the super refreshing ripple signal of detection, therefore, to eliminate the interference, because the frequency of resonant cavity is with middle part gold
The internal diameter increase of category ring and reduces, the own frequency of upper sensor or lower sensor is with the thickness of piezoelectric ceramics and upper and lower
Metal shell base thickness increase and increase, with the diameter of piezoelectric ceramics, the external diameter of upper and lower metal shell increase and reduce, therefore
Limited by the optimization to becket dimensional structure, upper sensor, each part dimension structure of lower sensor, can play and disappear
Except the effect of interference, the dimensional structure of becket 1 is set reasonable in the present embodiment, and such dimensional structure can make resonant cavity
Frequency and the frequency of upper sensor or lower sensor in itself relatively far apart, can so avoid producing signal interference, carry
The high precision of detection, under test gas are entered in cavity 5 by air inlet 1.1, and upper lead 4, lower lead 9 access external circuit, outside
Portion's circuit includes processor, radiating circuit, conversion switch, signal amplification circuit, signal modulation circuit and display circuit etc.,
Lower lead 9 connects radiating circuit, processor control radiating circuit transmitting pulse, and pulse senses top by conversion switch
Device sends ultrasonic wave, and ultrasonic wave is received through cavity by upper sensor, by signal modulation electricity after signal amplification circuit acts on
Processing is compared by processor after the modulation of road, processor again shows the data after processing through display circuit.
The structure of this detection sensor is very simple, without infiltrating in detection gas environment, need to only lead to detection gas
The air inlet 1.1 for crossing becket 1 imports, gas outlet 1.2 exports, and continual measurement can be achieved, can show timely air matter
Amount, oxygen concentration detects suitable for medical oxygen generator, and detectable concentration scope is 70-97%, it can also be used to other binary gas
Concentration Testing field, detection efficiency is high, and measurement is accurate.And existing detection method is compared, the structure of sensor has carried out whole
Close, reduce the usage quantity of sensor, reduce power consumption, and integral structure is more safe, saves cost.
It is described above, only it is preferred embodiment of the present utility model, any formal limit is not done to the utility model
System, it is every according to any simple modification made in the technical essence of the utility model to above example, equivalent variations, fall
Enter within the scope of protection of the utility model.
Claims (8)
- A kind of 1. oxygenerator oxygen concentration detection sensor, it is characterised in that：Including upper sensor, lower sensor, becket, Upper sensor, lower sensor are symmetricly set on becket both sides up and down, and upper sensor, lower sensor, becket are same Axle center, and upper sensor, lower sensor and metal ring combined face flat smooth, upper sensor, lower sensor are by gold Belong to closing at ring and be provided with air inlet, the gas outlet for making cavity inside and ft connection into a cylindrical cavity, becket ring body.
- A kind of 2. oxygenerator oxygen concentration detection sensor according to claim 1, it is characterised in that：Described top sensing Device is that U-shaped upper body, upper piezoelectric ceramic piece are formed by longitudinal section, and bottom and the becket top end face of upper body pass through glue Water is bonded, and upper piezoelectric ceramic piece is bonded in upper body inner bottom end face by glue, and upper piezoelectric ceramic piece and upper body are same Axle center, upper piezoelectric ceramic piece the two poles of the earth are equipped with the upper lead to stretch out, by silica gel inside upper body, under described Portion's sensor by longitudinal section is the lower case of inverted U, lower piezoelectric potsherd is formed, top and the becket bottom of lower case Face is bonded by glue, and lower piezoelectric potsherd is bonded in lower case inner tip face by glue, and lower piezoelectric potsherd is with Portion's housing is concentric, and lower piezoelectric potsherd the two poles of the earth are equipped with the lower lead to stretch out, by silica gel inside lower case, Upper body, the structure and size of lower case are identical, and upper piezoelectric ceramic piece, the specifications parameter of lower piezoelectric potsherd are consistent.
- A kind of 3. oxygenerator oxygen concentration detection sensor according to claim 2, it is characterised in that：Described upper case Body, the material of lower case are aluminium or stainless steel, and upper body, the external diameter of lower case are 12-25mm, side thickness 3- 6mm, upper body base thickness are 0.4-1.2mm, and lower case top thickness is 0.4-1.2mm.
- A kind of 4. oxygenerator oxygen concentration detection sensor according to claim 1, it is characterised in that：Outside described becket Footpath is consistent with upper sensor external diameter, and becket internal diameter is smaller 3-5mm than external diameter, and becket is highly 3-6mm.
- A kind of 5. oxygenerator oxygen concentration detection sensor according to claim 4, it is characterised in that：Described becket Material is stainless steel or aluminium.
- A kind of 6. oxygenerator oxygen concentration detection sensor according to claim 2, it is characterised in that：Described upper piezoelectricity pottery Ceramics external diameter/upper case internal diameter of ceramics is 0.3-0.5, ceramics thickness/upper case shell base thickness degree of upper piezoelectric ceramic piece For 0.5-1.
- A kind of 7. oxygenerator oxygen concentration detection sensor according to claim 1, it is characterised in that：Described top sensing Device, the working frequency of lower sensor are 20-40KHz.
- A kind of 8. oxygenerator oxygen concentration detection sensor according to claim 1, it is characterised in that：Described top sensing Device is reception type sensor, and lower sensor is emission type sensor.
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| CN201720170364.3U CN206710382U (en) | 2017-02-24 | 2017-02-24 | A kind of oxygenerator oxygen concentration detection sensor |
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| CN201720170364.3U CN206710382U (en) | 2017-02-24 | 2017-02-24 | A kind of oxygenerator oxygen concentration detection sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872568A (en) * | 2017-02-24 | 2017-06-20 | 常州波速传感器有限公司 | A kind of oxygenerator oxygen concentration detection sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872568A (en) * | 2017-02-24 | 2017-06-20 | 常州波速传感器有限公司 | A kind of oxygenerator oxygen concentration detection sensor |
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Address after: No.39 Xinggang Road, Zhonglou District, Changzhou City, Jiangsu Province Patentee after: Jiangsu wave speed sensor Co., Ltd Address before: 213125, room 178, No. 706 ERON South Road, bell tower area, Jiangsu, Changzhou Patentee before: BESTAR SENSORTECH Co.,Ltd. |