CN2067830U - Sensor for measuring liquid concentration - Google Patents
Sensor for measuring liquid concentration Download PDFInfo
- Publication number
- CN2067830U CN2067830U CN 90211593 CN90211593U CN2067830U CN 2067830 U CN2067830 U CN 2067830U CN 90211593 CN90211593 CN 90211593 CN 90211593 U CN90211593 U CN 90211593U CN 2067830 U CN2067830 U CN 2067830U
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- China
- Prior art keywords
- optical
- sensor
- fiber transmission
- optical fiber
- liquid concentration
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Abstract
The utility model relates to a novel optical sensor, in particular to a sensor for measuring liquid concentration. The key point is in that the sensor for measuring liquid concentration is composed of a special optical sensing prism, an optical fiber transmission transmitter, an optical fiber transmission light receiver, a rack base seat of the sensor and an outer shell of the sensor. The sensor for measuring liquid concentration is characterized in that a total reflection light path adjusting surface is led in the special optical sensing prism designed in a standard mode, the sensor for measuring liquid concentration is made to have simple and standard structure, convenient technologic processing and manufacturing, low cost and complete functions.
Description
The utility model belongs to the optical sensor class, specifically a kind of new liquid concentration testing sensor.
At modern industrial and agricultural production, medicine, chemical industry, food.Each side such as sugar industry for the detection of strength of fluid wide region, have urgent requirement, wish that appearance is a kind of simple in structure, and it is reliable to detect sensing, are easy to commercial production and make, and processes is easy, lower-cost new liquid concentration detection sensor.
Yet existing sensors can not realize above-mentioned requirements.(patent No.: the test philosophy that proposes 85100867) is consistent with principle of work of the present utility model though the inventor is in patent of invention " the refraction index test system with reflective optical sensor ", but its related sensor construction is lack of standardization, processes, the assembly production complexity, and on function, the test narrow dynamic range, anticorrosive, all there is weakness in high temperature resistant aspect.
The utility model is utilizing on the light refraction test philosophy basis, a kind of novel liquid concentration testing sensor is proposed, its project organization is simple, standard, processes is easy to make, and is with low cost, on test function, detect wide dynamic range, be easy to realize wide dynamic range, wide temperature measurement range test is easy to be implemented in have in corrosive rugged surroundings and uses.
The utility model is by special-purpose optical sensing prism, the Optical Fiber Transmission optical transmitting set, and the Optical Fiber Transmission optical receiver, sensor is shelved pedestal, and sensor outer housing is formed.Optical index η such as wherein special-purpose optical sensing prism employing optical glass or synthetic cut stone crystal are that the optical medium material between the 1.5-4.5 becomes to have upper and lower two symmetrical parallel surfaces, about two trapezoidal optical sensitive faces in symmetrical inclination angle, have slightly outstanding girdle around its lower edge, in order to prism with shelve pedestal, shell body mount and sealing.The Optical Fiber Transmission optical transmitting set by miniature solid light source, silica fibre or glass optical fiber bundle or plastic optical fiber transmission line, the series connection of directional light converter constitute, the miniature solid light source can collimate in the optical fiber transmission line afterbody exiting surface and be formed by visible light, near infrared light light emitting semiconductor device processing assembling.The diameter of optical fiber transmission line and length are determined according to actual needs.The directional light converter can be formed in the optical fiber transmission line head by clavate optical glass GRIN Lens process and assemble, also can adopt optical glass or synthetic cut stone globe lens to be assemblied in the optical fiber transmission line head and form.The Optical Fiber Transmission optical receiver is by the miniature solid photo-detector, and silica fibre or glass optical fiber bundle or plastic optical fiber transmission line, optically focused converter are connected and constituted.The miniature solid photo-detector collimates in the optical fiber transmission line tail end light receiving surface by the processing assembling of optical semiconductor sensitive detection parts to constitute.The diameter of optical fiber transmission line and length are determined according to actual needs.The optically focused converter can be serially connected with the optical fiber transmission line head and be formed by clavate optical glass GRIN Lens, also can adopt optical glass or jewel globe lens mount to form at the optical fiber transmission line head.Sensor is shelved pedestal and is adopted metal or plastics or stupalith to make the garden cylindricality, and the end face strictness of its cylindricality is perpendicular to the post height, and strict vertical and its both ends of the surface of break-through of two symmetrical holes are arranged.Two bore dias and optical fiber transmission line head diameter are complementary.Sensor outer housing is made into the garden tubular by metal or plastic material, housing parts, and cap two parts, the external diameter that the internal diameter of housing and sensor are shelved pedestal is complementary, and cap is matched by screw thread and housing, plays the sealing to sensor, fixedly all-in-one-piece effect.
Fig. 1 is a structural principle synoptic diagram of the present utility model
Fig. 2 is the synoptic diagram of the special-purpose optical sensing prism of the utility model.
Below in conjunction with accompanying drawing the utility model example is further described.
Liquid concentration testing sensor is by special-purpose optical sensing prism (1), Optical Fiber Transmission optical transmitting set (2) (3) (4), and Optical Fiber Transmission optical receiver (5) (6) (7), sensor are shelved pedestal (8), and sensor outer housing (9) (10) is formed.Special-purpose optical sensing prism (1) is ground to form greater than 1.74 synthetic cut stone crystal garden column material by optical index η has upper and lower two symmetrical parallel surfaces, and the garden post of left and right two symmetrical inclination angle optical sensitive faces is trapezoidal.Fig. 2 is the synoptic diagram of special-purpose optical sensing prism, and parallel surface is plane of light incidence and exit facet under it, and last parallel surface is that the total reflection light path is adjusted face, this parallel surface evaporation one metal or medium total reflection film.Trapezoidal side by symmetry angle α decision is the optical sensitive face.The scope of the optical index of the strength of fluid correspondence of Jian Ceing determines the α angle to select in 20 ° of-65 ° of scopes as requested.The Optical Fiber Transmission optical transmitting set is by miniature solid light source (2), silica fibre transmission line (3), and directional light converter (4) is composed in series.The miniature solid light source collimates in the optical fiber transmission line afterbody its exiting surface by GaAs/GaALAs light emitting diode processing assembling and forms emission wavelength 0.85-0.9 μ m.Silica fibre transmission line core diameter is Φ 100 μ m-Φ 200 μ m, and length is 1 meter-5 meters.The directional light converter adopts the assembling of synthetic cut stone globe lens to be fixed in the optical fiber transmission line head and forms.The Optical Fiber Transmission optical receiver is by miniature solid photo-detector (5), silica fibre transmission line (6), and optically focused converter (7) is in series.The miniature solid photo-detector be silicon PIN photoelectric diode process specially the assembling its sensitive surface is formed perpendicular to optical fiber transmission line afterbody bright dipping end.Silica fibre transmission line diameter is Φ 100 μ m-Φ 200 μ m, and length is 1 meter-5 meters.The optically focused converter adopts the synthetic cut stone globe lens fixedly to be assembled in the optical fiber transmission line head and forms.Sensor is shelved pedestal and is processed into the garden cylindricality with aluminum alloy materials, and the hole, garden of two symmetries of break-through two parallel end faces is used for by dress light transmitting terminal and light-receiving terminal.Sensor outer housing is that housing (9) and cap (10) are made into the garden tubular with stainless steel, and the external diameter that its internal diameter and sensor are shelved pedestal is complementary, and cap is connected by the screw thread turn with housing.
Basic functional principle of the present utility model and process are, the miniature solid optical transmitting set is applied the DC current of 20-50mA, produce the near infrared light of certain intensity, become directional light through optical fiber transmission line with parallel photoconverter, the following parallel surface of the special-purpose optical sensing prism of this directional light vertical incidence, after being α angle beam incident optical sensitive area with normal, reflect, be α to adjust the face normal with last parallel surface total reflection light path along the α angle with side direction optics sensitive area
1Angle incident also reflects, the incident second side direction optics sensitive area and vertical time parallel surface reflect once more to be the α angle with second side direction optics sensitive area normal again then, directly, received by the miniaturized solid-state photo-detector through optically focused converter feed-in optical fiber transmission line.During actual inspection side strength of fluid, in the sensor optics sensitive area immersed in liquid level, strength of fluid not simultaneously, its refractive index difference causes reflective light intensity to change, thus effective tracer liquid concentration realizes the effect of sensing detection.
Claims (3)
1, by special-purpose optical sensing prism (1), Optical Fiber Transmission optical transmitting set (2) (3) (4), Optical Fiber Transmission optical receiver (5) (6) (7), sensor is shelved pedestal (8), the new liquid concentration detection sensor that sensor outer housing (9) (10) combines is characterized in that the total reflection light path that its special-purpose optical sensing prism has two optical sensitive faces that symmetrical inclination angle is α and evaporation total reflection medium or a metal film adjusts face.
2, new liquid concentration detection sensor as claimed in claim 1, it is characterized in that it is that optical medium material between the 1.5-4.5 forms that special-purpose optical prism adopts optical glass or synthetic cut stone crystal optical index η, the inclination alpha of its optical sensitive face (and angle of following parallel surface) is between 20 °-65 °.
3, new liquid concentration detection sensor as claimed in claim 1 is characterized in that the Optical Fiber Transmission optical transmitting set by the miniature solid light emitting source, optical fiber transmission line, and non-removable one is processed in directional light converter series connection assembling.The Optical Fiber Transmission optical receiver is by the miniature solid photo-detector, and optical fiber transmission line, optically focused converter are connected to assemble and be processed into non-removable one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90211593 CN2067830U (en) | 1990-02-07 | 1990-02-07 | Sensor for measuring liquid concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90211593 CN2067830U (en) | 1990-02-07 | 1990-02-07 | Sensor for measuring liquid concentration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2067830U true CN2067830U (en) | 1990-12-19 |
Family
ID=4891364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90211593 Pending CN2067830U (en) | 1990-02-07 | 1990-02-07 | Sensor for measuring liquid concentration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2067830U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620760A (en) * | 2012-04-05 | 2012-08-01 | 陈云钦 | Optical fiber probe and composite type liquid optical fiber concentration meter employing optical fiber probe |
| CN105044027A (en) * | 2014-04-23 | 2015-11-11 | 保险丝公司 | Urea concentration sensor |
| IT201700092781A1 (en) * | 2017-08-10 | 2019-02-10 | Maselli Misure S P A | MEASURING INSTRUMENT OF THE CO2 CONCENTRATION WITH A PERFECTED COLLIMATOR |
| CN110579261A (en) * | 2019-10-09 | 2019-12-17 | 宁波吉利罗佑发动机零部件有限公司 | Device and method for detecting liquid level of cooling liquid, concentration of cooling liquid and cooling liquid |
| CN112147082A (en) * | 2020-09-24 | 2020-12-29 | 杭州春来科技有限公司 | Vehicle-mounted urea monitoring device and monitoring method |
| TWI762382B (en) * | 2020-12-24 | 2022-04-21 | 日商東橫化學股份有限公司 | Liquid type discrimination sensor |
-
1990
- 1990-02-07 CN CN 90211593 patent/CN2067830U/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620760A (en) * | 2012-04-05 | 2012-08-01 | 陈云钦 | Optical fiber probe and composite type liquid optical fiber concentration meter employing optical fiber probe |
| CN105044027A (en) * | 2014-04-23 | 2015-11-11 | 保险丝公司 | Urea concentration sensor |
| CN105044027B (en) * | 2014-04-23 | 2019-11-26 | 哈姆林电子(苏州)有限公司 | Urea concentration sensor |
| IT201700092781A1 (en) * | 2017-08-10 | 2019-02-10 | Maselli Misure S P A | MEASURING INSTRUMENT OF THE CO2 CONCENTRATION WITH A PERFECTED COLLIMATOR |
| CN110579261A (en) * | 2019-10-09 | 2019-12-17 | 宁波吉利罗佑发动机零部件有限公司 | Device and method for detecting liquid level of cooling liquid, concentration of cooling liquid and cooling liquid |
| CN110579261B (en) * | 2019-10-09 | 2020-10-27 | 宁波吉利罗佑发动机零部件有限公司 | Device and method for detecting liquid level of cooling liquid, concentration of cooling liquid and cooling liquid |
| CN112147082A (en) * | 2020-09-24 | 2020-12-29 | 杭州春来科技有限公司 | Vehicle-mounted urea monitoring device and monitoring method |
| TWI762382B (en) * | 2020-12-24 | 2022-04-21 | 日商東橫化學股份有限公司 | Liquid type discrimination sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |