CN210863518U - Photoelectric detection module - Google Patents
Photoelectric detection module Download PDFInfo
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- CN210863518U CN210863518U CN201921690367.5U CN201921690367U CN210863518U CN 210863518 U CN210863518 U CN 210863518U CN 201921690367 U CN201921690367 U CN 201921690367U CN 210863518 U CN210863518 U CN 210863518U
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- receiving end
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Abstract
The utility model relates to a photoelectric detection field, and a photoelectric detection module is disclosed, including light source receiving end cover, main structure spare and light source transmitting end cover, light source receiving end cover, main structure spare and light source transmitting end cover are the square of rectangle, the screw fixation hole has been seted up to the four corners position of light source receiving end cover, the middle fixed orifices has all been seted up to the four corners position of main structure spare and light source transmitting end cover, light source receiving end cover, main structure spare and light source transmitting end cover are through fixed orifices and screw fixation hole interconnect in the middle of the screw runs through, main structure spare is at the intermediate position, light source receiving end cover. The utility model discloses in, beat out suitable through-hole so that draw forth photodiode's pin at the end cover surface. Subsequently, in order to guarantee leakproofness and light transmissivity equally, also place quartz chip on the recess of inner surface, the utility model discloses use in a flexible way, can adjust optical path length according to actual demand.
Description
Technical Field
The utility model relates to a photoelectric detection field especially relates to a photoelectric detection module.
Background
The water quality detector is a chemical analysis instrument for detecting the concentration of different substances in water, and the main measurement parameters comprise total phosphorus, total nitrogen and total mercury, and various substances including nutrient salts in seawater, such as phosphate, nitrate, nitrite, silicate, ammonium salt and the like.
Flow injection analysis: is a novel continuous flow analysis technology proposed in 1974. This technique involves injecting a volume of sample solution into a flowing, non-air-spaced reagent solution (or water) carrier fluid, flowing the injected sample solution into a reaction coil to form a region, mixing and reacting with the reagent in the carrier fluid, and then entering a flow-through detector for assay analysis. The method is mainly applied to the fields of soil sample analysis, drug research, blood analysis, water quality detection and the like at present.
Different measuring methods are adopted for different substances, and common measuring methods comprise a spectrophotometer method, a fluorescence method, an electrode method and the like. The existing photoelectric detection on the market at present can influence the measured data when in use. To this end, we propose a photodetecting module.
SUMMERY OF THE UTILITY MODEL
The utility model discloses solve the technical problem that above-mentioned prior art exists, provide a photoelectric detection module.
In order to achieve the above object, the present invention adopts the following technical solution, a photoelectric detection module comprises a light source receiving end cap, a main structural member and a light source emitting end cap, wherein the light source receiving end cap, the main structural member and the light source emitting end cap are rectangular blocks, screw fixing holes are formed at four corners of the light source receiving end cap, middle fixing holes are formed at four corners of the main structural member and the light source emitting end cap, the light source receiving end cap, the main structural member and the light source emitting end cap are interconnected with each other through the middle fixing holes and the screw fixing holes by screws, the main structural member is at a middle position, a photodiode pin leading-out hole is formed at a middle position of the light source receiving end cap, a liquid inlet hole is vertically formed at a top end position of the main structural member, a circular groove is formed at a middle position of a front, the light source comprises a light source emitting end cover, a light emitting diode, a light source emitting end cover, a light source emitting end cover, a quartz wafer placing groove, a main structural member, a light emitting diode emitting light through hole and a light source emitting end cover.
As preferred, the liquid hole has been seted up perpendicularly to main structure's bottom, and the shape size in liquid hole is unanimous with the feed liquor hole, the feed liquor inclined hole has been seted up to main structure's inside, the feed liquor inclined hole is the hole of slope, the lower extreme and the central through-hole intercommunication of feed liquor inclined hole.
Preferably, the lower end of the liquid inlet inclined hole is provided with a liquid outlet inclined hole which is parallel to the liquid inlet inclined hole, the liquid outlet inclined hole is formed in the main structural member, and the upper end of the liquid outlet inclined hole is communicated with the central through hole.
Preferably, the inner surface of the end cover contacting the main structural member is carved with a convex ring, the convex ring can be just embedded in the circular groove of the main structural member, a quartz wafer is placed on the groove of the convex ring, the water tightness and the air tightness of the through hole are ensured by pressing the sealing ring by the quartz wafer, and meanwhile, the quartz wafer has good light transmission property. In order to make light smoothly reach the receiving end from the emitting end, the outer surface of the end cover of the emitting end is carved with a groove which is in accordance with the shape of the light-emitting diode by taking the through hole as the center, and the light-emitting diode can be directly embedded into the end cover of the emitting end.
Preferably, the inner surface of the light source receiving end cover is also engraved with a convex ring, and different from the engraving of the groove on the outer surface of the emitting end cover, the receiving end cover is engraved with a groove according to the shape of the photodiode at the center of the inner surface ring, so as to embed the photodiode in the end cover, and the outer surface of the end cover is provided with a proper through hole for leading out the pin of the photodiode. Subsequently, a quartz wafer is also placed on the recess of the inner surface in order to ensure the hermeticity and the light transmission property.
Advantageous effects
The utility model provides a photoelectric detection module. The method has the following beneficial effects:
(1) this photoelectric detection module, also carve a protruding ring at the internal surface of light source receiving end cover, with the different of transmitting end cover surface sculpture recess, the receiving end cover is in the central point of internal surface ring puts, carves a recess according to photodiode's shape for with photodiode embedding in the end cover, and beat suitable through-hole so that draw forth photodiode's pin at the end cover surface. Subsequently, in order to guarantee leakproofness and light transmissivity equally, also place quartz chip on the recess of inner surface, the utility model discloses use in a flexible way, can adjust optical path length according to actual demand.
(2) This photoelectric detection module, when using the injection method that flows, reaction liquid is continuous flow, and the design of main structure's central through-hole adoption similar pipeline in the invention can design the length and the diameter of central through-hole according to actual requirement, can make the reaction liquid that flows be full of inside all the time, satisfies the requirement to even solution in the lambert-beer law, thereby makes the utility model discloses simple structure, easy processing reduces manufacturing cost.
(3) This photoelectric detection module, the sea water is continuous flows in from the instrument pipeline, and after having carried out chemical reagent injection, heating promotion chemical reaction, reaction liquid gets into photoelectric detection module, because main structure's central through-hole diameter only has several millimeters, and whole through-hole can be filled with fast to the reaction liquid and measure. From the start of sampling, the chemical reaction is carried out, to the end of the measurement, the time of the whole process is short and the steps are run continuously. Therefore, the invention can make the equipment have the capability of profile measurement, so the utility model can effectively reduce the influence of bubbles on the measurement under the condition of matching with the flow injection method.
Drawings
FIG. 1 is a general schematic view of the present invention;
FIG. 2 is a front view of the main structure of the present invention;
FIG. 3 is a side sectional view of the main structural member of the present invention;
FIG. 4 is a view of the outer surface of the end cap of the light source emitting end of the present invention;
fig. 5 is an external view of the end cap of the light source receiving end of the present invention;
fig. 6 is a schematic diagram of the detection circuit of the present invention.
Illustration of the drawings:
the light source comprises a light source receiving end cover 1, a photodiode pin leading-out hole 2, a screw fixing hole 3, a main body structural member 4, a liquid inlet hole 5, a circular groove 6, an annular groove 7, a central through hole 8, a light source emitting end cover 9, a quartz wafer placing groove 10, a light emitting diode emitting light through hole 11, a middle fixing hole 12, a liquid outlet hole 13, a liquid inlet inclined hole 14 and a liquid outlet inclined hole 15.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
Example (b): a photoelectric detection module is shown in figures 1-6 and comprises a light source receiving end cover 1, a main body structural member 4 and a light source transmitting end cover 9, wherein the light source receiving end cover 1, the main body structural member 4 and the light source transmitting end cover 9 are rectangular squares, screw fixing holes 3 are formed in four corners of the light source receiving end cover 1, middle fixing holes 12 are formed in four corners of the main body structural member 4 and the light source transmitting end cover 9, the light source receiving end cover 1, the main body structural member 4 and the light source transmitting end cover 9 are mutually connected through the middle fixing holes 12 and the screw fixing holes 3 by screws, the main body structural member 4 is arranged in the middle position, a photodiode pin leading-out hole 2 is formed in the middle position of the light source receiving end cover 1, a liquid inlet hole 5 is vertically formed in the top end position of the main body structural member 4, a circular groove 6 is formed in the middle position of, circular recess 6 is circular groove, annular groove 7 has been seted up to circular recess 6's intermediate position, central through-hole 8 has been seted up to annular groove 7's intermediate position, light source emission end cover 9's intermediate position has been seted up quartz wafer and has been placed recess 10, and quartz wafer places recess 10 and runs through main structure 4, quartz wafer places recess 10 and is circular shape groove, quartz wafer places recess 10's intermediate position and has seted up emitting diode emission light through-hole 11, emitting diode emission light through-hole 11 runs through light source emission end cover 9.
The middle of the module is a main structural part 4 which is mainly used for filling the detected liquid in the optical path of photoelectric detection. The central point puts and has a through-hole, with positive and negative two side intercommunication, in order to guarantee that the liquid at through-hole both ends can not leak, main part structure 4 positive and negative two side inwards carves and uses the through-hole as the circular recess 6 of centre of a circle, carve an annular groove 7 that uses the through-hole as the centre of a circle again on this basis, place the sealing washer in annular groove 7, in order to let liquid can follow through-hole one end inflow, the other end flows out, so communicate the both ends of central through-hole 8 through the inclined hole in the structure side, utilize the coupling can link together the feed liquor hole 5 and the play liquid hole 13 of water route and module.
Since the light travels in a straight line, a hole is also formed at the position of the light source emission end cap 9 and the central through hole 8 of the body structure 1. In order to ensure the water tightness and the air tightness of a central through hole 8 of the main structural member 4 and ensure the smooth light path, a raised circular ring is engraved on the inner surface of the end cover contacting the main structural member by taking the through hole of the end cover as the center of a circle, the raised circular ring can be just embedded in the circular groove 6 of the main structural member 4, a quartz wafer is placed on the groove of the raised circular ring, the water tightness and the air tightness of the through hole are ensured by extruding a sealing ring by the quartz wafer, and meanwhile, the quartz wafer has good light transmission characteristics. In order to make light smoothly reach the receiving end from the emitting end, the outer surface of the end cover of the emitting end is carved with a groove which is in accordance with the shape of the light-emitting diode by taking the through hole as the center, and the light-emitting diode can be directly embedded into the end cover of the emitting end.
Similarly, a raised circular ring is also engraved on the inner surface of the light source receiving end cover 1, and different from the engraving of a groove on the outer surface of the transmitting end cover, the receiving end cover is arranged at the center of the inner surface circular ring, and a groove is engraved according to the shape of the photodiode, so that the photodiode is embedded in the end cover, and a proper through hole is punched on the outer surface of the end cover to lead out a pin of the photodiode. Subsequently, a quartz wafer is also placed on the recess of the inner surface in order to ensure the hermeticity and the light transmission property.
In the flow injection method, no special module is used for quantifying samples and reagents, and no special module is used for chemical reaction, so that the condition that the liquid path part of the instrument occupies space is reduced. The sample and the reagent continuously flow in the pipeline, and the reagent is injected into the sample at a specific time point according to the requirement of the chemical reaction, so the chemical reaction also flows, and even if bubbles are precipitated in the reaction liquid, the bubbles are removed from the liquid discharge port along with the flow of the reaction liquid because the whole liquid path is always in a flowing state, and the bubbles are not accumulated in the photoelectric detection module, thereby the accuracy of detection data is influenced.
The utility model discloses when the cooperation injection method that flows, in order to guarantee water proofness and gas tightness, it is fixed to use the coupling to be connected between pipeline part and feed liquor hole, the play liquid hole. The reaction liquid can flow from the liquid inlet hole to the liquid inlet inclined hole and fill the central through hole, and the concentration is measured by using a spectrophotometer method by utilizing the light emitting diode and the photodiode at the central through hole.
The spectrophotometric method is based on the lambert-beer law: a ═ a ═ b ═ c
A: degree of light absorption by solution
a: the absorption coefficient (L/(mole m)), characterizes the sensitivity of the light absorbing species. The larger the value of a, the higher the sensitivity.
b: an optical path length (m).
c: concentration (mole/L).
When a beam of monochromatic light passes through a homogeneous solution, the absorbance of the solution to the monochromatic light is proportional to the product of the solution concentration and the optical path. The utility model discloses in, optical distance b is the definite value, and absorption coefficient accessible standard solution records, so absorbance A and solution concentration c are linear relation.
When using the injection method that flows, the reaction liquid is continuous mobile, the utility model discloses well major structure's central through-hole 8 adopts the design of similar pipeline, can design the length and the diameter of central through-hole according to actual requirement, can make the reaction liquid that flows be full of inside all the time, satisfies in the lambert-beer law to the requirement of even solution
Because the utility model discloses a design specially for the cooperation injection method that flows, different with intermittent type formula sampling, the sea water is continuous from the instrument pipeline inflow, after having carried out chemical reagent injection, heating promotion chemical reaction, reaction liquid gets into the photoelectric detection module, because main structure's central through-hole diameter only has several millimeters, the reaction liquid can be full of whole through-hole fast and measure. From the start of sampling, the chemical reaction is carried out, to the end of the measurement, the time of the whole process is short and the steps are run continuously. So use the utility model discloses can make equipment have the ability of section measurement.
The bubbles in the liquid path can affect the signal sampling value of the instrument, and the main reason is that the bubbles are sudden and irregular, and the bubbles can remain in the water path, so that the signals at the later stage lack an effective processing method.
Dissolved gas in seawater can be continuously contacted with the hole wall when flowing through the module, and the gas can keep a continuous motion form to carry out continuous motion in a place where the inner wall of the through hole is smooth. And in the place that there is little burr or corner at the through-hole inner wall, the bubble just has very big probability attached to burr or corner, and along with attaching the increase of gas, tiny bubble is probably blockked up the through-hole and is influenced photoelectric measurement.
The utility model discloses in, handle the edges and corners of module inside through-hole, the attachment point in hole is guaranteed the bubble and can be discharged smoothly in module inside to the minimize bubble. In addition, the design of the holes also ensures that the burrs of the corner edges can be quickly inspected and processed.
The utility model discloses just having considered the installation overall arrangement of circuit at the beginning of the design, because the main function of detection circuitry is that the signal of amplifying photodiode and carrying out analog-to-digital conversion, not complicated in the design, so the utility model discloses directly put detection circuitry at the surface of light source receiving end cover, photodiode signal output pin can directly connect on the circuit board, has saved middle wiring process, can reduce the interference of noise to the signal simultaneously again.
Use the utility model discloses a circuit schematic diagram is as an example, and photodiode D1 converts the light signal that detects into current signal, converts voltage signal into through U1A, and voltage signal enlargies through U1B, inputs to U2 after enlarging and carries out analog-to-digital conversion, transmits digital signal for the treater through the digital communication interface at last.
The utility model discloses a theory of operation: in the flow injection method, no special module is used for quantifying samples and reagents, and no special module is used for chemical reaction, so that the condition that the liquid path part of the instrument occupies space is reduced. The sample and the reagent continuously flow in the pipeline, and the reagent is injected into the sample at a specific time point according to the requirement of the chemical reaction, so the chemical reaction also flows, and even if bubbles are precipitated in the reaction liquid, the bubbles are removed from the liquid discharge port along with the flow of the reaction liquid because the whole liquid path is always in a flowing state, and the bubbles are not accumulated in the photoelectric detection module, thereby the accuracy of detection data is influenced.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above-described embodiments, and many modifications are possible. Any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should be considered as belonging to the protection scope of the present invention.
Claims (6)
1. The utility model provides a photoelectric detection module, includes light source receiving end cover (1), major structure spare (4) and light source emission end cover (9), its characterized in that: the light source receiving end cover (1), the main structural part (4) and the light source emitting end cover (9) are all rectangular squares, screw fixing holes (3) are arranged at the four corners of the end cover (1) of the light source receiving end, the four corners of the main structural part (4) and the end cover (9) of the light source emission end are provided with middle fixing holes (12), the main structural part (4) is arranged in the middle, a photodiode pin leading-out hole (2) is arranged in the middle of the light source receiving end cover (1), the top end of the main structural part (4) is vertically provided with a liquid inlet hole (5), a quartz wafer placing groove (10) is arranged in the middle of the light source emission end cover (9), the quartz wafer placing groove (10) penetrates through the main structural part (4), and the quartz wafer placing groove (10) is a circular groove;
liquid outlet holes (13) are vertically formed in the bottom end of the main structural member (4), the shape and the size of the liquid outlet holes (13) are consistent with those of the liquid inlet holes (5), liquid inlet inclined holes (14) are formed in the main structural member (4), and liquid outlet inclined holes (15) are formed in the lower ends of the liquid inlet inclined holes (14).
2. The photodetecting module according to claim 1, characterized in that: the light source receiving end cover (1), the main body structural part (4) and the light source transmitting end cover (9) are connected with each other through the middle fixing hole (12) and the screw fixing hole (3) in a screw penetrating mode.
3. The photodetecting module according to claim 1, characterized in that: circular recess (6) have been seted up to the positive intermediate position of major structure spare (4), circular recess (6) are circular groove, annular groove (7) have been seted up to the intermediate position of circular recess (6), central through-hole (8) have been seted up to the intermediate position of annular groove (7).
4. The photodetecting module according to claim 1, characterized in that: and a light emitting diode light emitting through hole (11) is formed in the middle of the quartz wafer placing groove (10), and the light emitting diode light emitting through hole (11) penetrates through the end cover (9) of the light source emitting end.
5. The photodetecting module according to claim 1, characterized in that: the liquid inlet inclined hole (14) is an inclined hole, and the lower end of the liquid inlet inclined hole (14) is communicated with the central through hole (8).
6. The photodetecting module according to claim 1, characterized in that: the liquid outlet inclined hole (15) and the liquid inlet inclined hole (14) are parallel to each other, the liquid outlet inclined hole (15) is formed in the main structural member (4), and the upper end of the liquid outlet inclined hole (15) is communicated with the central through hole (8).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921690367.5U CN210863518U (en) | 2019-10-10 | 2019-10-10 | Photoelectric detection module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921690367.5U CN210863518U (en) | 2019-10-10 | 2019-10-10 | Photoelectric detection module |
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| CN210863518U true CN210863518U (en) | 2020-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567875A (en) * | 2019-10-10 | 2019-12-13 | 杭州浅海科技有限责任公司 | photoelectric detection module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567875A (en) * | 2019-10-10 | 2019-12-13 | 杭州浅海科技有限责任公司 | photoelectric detection module |
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