CN203231978U

CN203231978U - Single-lamp-bead multi-channel colorimetric system

Info

Publication number: CN203231978U
Application number: CN 201320204503
Authority: CN
Inventors: 柯慧贤; 俞祖璇; 陈锦; 沈琪
Original assignee: XIAMEN STANDARDS SCIENTIFIC INSTRUMENT CO Ltd
Current assignee: XIAMEN STANDARDS SCIENTIFIC INSTRUMENT CO Ltd
Priority date: 2013-04-22
Filing date: 2013-04-22
Publication date: 2013-10-09
Anticipated expiration: 2023-04-22

Abstract

The utility model discloses a single-lamp-bead multi-channel colorimetric system. The single-lamp-bead multi-channel colorimetric system comprises light-emitting diode (LED) lamps with at least two colors, a detection chamber and photoelectric sensors, wherein a plurality of colorimetric grooves for holding cuvettes are formed in the detection chamber; a detection hole for holding a photoelectric sensor is formed in one side of each colorimetric groove; a positioning hole for holding an LED lamp with at least two colors is formed in the other side of each colorimetric groove; each LED lamp with at least two colors comprises a base plate, a lampshade, output pins, at least two input pins and at least two LED chips; the at least two LED chips are positioned in the lampshade and emit light towards the lampshade; the number of the output pins is as same as the number of the LED chips; light with different wavelengths is generated by the at least two LED chips and exactly covers the boundary range of the positioning holes and the colorimetric grooves; and the at least two LED chips are connected to a circuit board through the output pins and the at least two input pins. Compared with the prior art, the single-lamp-bead multi-channel colorimetric system greatly simplifies the structure of equipment, reduces the processing difficulty and guarantees the detection precision of the whole colorimetric system.

Description

A kind of single lamp pearl hyperchannel colorimetric system

Technical field

The utility model relates to detection range, relates to a kind of single lamp pearl hyperchannel colorimetric system in particular.

Background technology

It mainly is the lamp source (as tungsten lamp) of continuous wavelength and the light source (as monochromatic LED lamp) of single wavelength that instrument in the market uses detection light source, when detecting certain index, normally adopt following dual mode: a kind of is continuous wavelength lamp source+monochromatic filter, and another kind is directly to adopt monochromatic LED lamp.For first kind of mode, when needing wavelength switching not doing test item, generally be to change corresponding optical filter by craft or mechanical mode, wherein manual the switching caused the stained of optical filter and scuffing easily, the machinery switching then has the complicated and low problem of reliability of mechanism, also increased the volume and weight of instrument simultaneously, be unfavorable for carrying and transporting.

Chinese invention patent application CN101980007A discloses a kind of colorimetric system that switches based on LED lamp multi-pass, comprise expelling plate, sensing chamber and photoelectric sensor, have the cell that several can place cuvette in this sensing chamber, the one side of each cell has the detection hole of placing photoelectric sensor, another side has several unthreaded holes, unthreaded hole is positioned at the right opposite that detects the hole, expelling plate has some groups of lamp holes, place the LED lamp in the lamp hole, each lamp hole is connected with a unthreaded hole, the diameter of unthreaded hole is littler than lamp hole, and the LED lamp connects the external circuit board.

So, it can plug the LED lamp of different wave length respectively on a plurality of lamp holes, these LED lamp on and off are by external circuit board control, when the LED of certain wavelength of needs lamp test sample, only light the LED lamp of this wavelength by circuit control, light passes the photoelectric sensor on the fluid sample arrival another side that detects in the cell by unthreaded hole, so just can be implemented in the sample that can detect a plurality of different wave lengths on the cell selectively, has improved detection efficiency greatly.

But, for the light that the LED lamp of different wave length produces in a plurality of lamp holes can be received by photoelectric sensor better, the axis of these a plurality of unthreaded holes is parallel to each other and draws close towards the centre, has improved difficulty of processing greatly so on the one hand, also accuracy of detection has been brought bigger influence.

In view of this, the inventor has this case to produce at the above-mentioned defective further investigation of existing colorimetric system then.

The utility model content

The purpose of this utility model is to provide a kind of single lamp pearl hyperchannel colorimetric system, to solve existing colorimetric system difficulty of processing height and accuracy of detection is influenced big problem.

In order to reach above-mentioned purpose, solution of the present utility model is:

A kind of single lamp pearl hyperchannel colorimetric system comprises sensing chamber and photoelectric sensor, has the cell that several can place cuvette in this sensing chamber, and the one side of each cell has the detection hole of placing photoelectric sensor; Wherein, this colorimetric system also comprises dichromatism LED lamp at least, the another side of each cell has be used to placing the pilot hole of dichromatism LED lamp at least, this at least dichromatism LED light fixture substrate is arranged, lampshade, output pin, at least two input pins and be positioned at lampshade and towards at least two luminous led chips of lampshade, the quantity of this input pin equates with the quantity of led chip, these at least two led chips produce the light of different wave length and cover the boundary scope of pilot hole and cell just, and this output pin and at least two input pins make at least two led chips access to circuit board.

Further, this colorimetric system also comprises MCU unit, A/D modular converter, D/A modular converter and PMW control module, this photoelectric sensor is by A/D modular converter and linking to each other with the MCU unit, and this MCU unit passes through the D/A modular converter successively with the PMW control module and links to each other with dichromatism LED lamp at least.

After adopting said structure, the utility model relates to a kind of single lamp pearl hyperchannel colorimetric system, and it is by arranging dichromatism LED lamp at least, compared with prior art, it only needs a pilot hole to get final product, and need not to arrange a plurality of lamp holes and unthreaded hole, simplify the structure of equipment greatly, reduced difficulty of processing; In addition, by to the adjustment of led chip in encapsulation, can guarantee that light that each led chip produces covers the boundary scope of pilot hole and cell just when lighting, can guarantee that so light is vertical with cuvette, guarantee accuracy of detection.

Description of drawings

The one-piece construction synoptic diagram of Fig. 1 a kind of single lamp pearl hyperchannel colorimetric system for the utility model relates to;

Fig. 2 is the cut-open view when one group of structure assembling is finished among Fig. 1;

Fig. 3 is the structural representation of three-color LED light;

Fig. 4 realizes self balancing schematic block circuit diagram for the utility model.

Among the figure:

Colorimetric system 100

At least dichromatism LED lamp 1 substrate 11

Lampshade 12 output pins 13

Input pin 14 led chips 15

Sensing chamber's 2 cells 21

Cuvette 22 detects hole 23

Pilot hole 24 photoelectric sensors 3

MCU unit 41 A/D modular converters 42

D/A modular converter 43 PMW control modules 44.

Embodiment

In order further to explain the technical solution of the utility model, the utility model is elaborated below by specific embodiment.

As shown in Figure 1 to Figure 3, a kind of single lamp pearl hyperchannel colorimetric system 100 that the utility model relates to, comprise dichromatism LED lamp 1, sensing chamber 2 and photoelectric sensor 3 at least, have several cells that can place cuvette 22 21 in this sensing chamber 2, the one side of each cell 21 has the detection hole 23 of placing photoelectric sensor 3, the another side of each cell 21 has pilot hole 24, this pilot hole 24 is used for placing dichromatism LED lamp 1 at least, in the present embodiment, this at least dichromatism LED lamp 1 be three-color LED light.Need to prove that it is all basic identical with prior art for sensing chamber 2 and photoelectric sensor 3, is not described in detail, improvements of the present utility model are to be provided with dichromatism LED lamp 1 at least.

As shown in Figures 2 and 3, this at least dichromatism LED lamp 1 have substrate 11, lampshade 12, output pin 13, at least two input pins 14 and at least two led chips 15, these at least two led chips 15 are positioned at lampshade 12 and luminous towards lampshade 12, the quantity of this input pin 14 equates with the quantity of led chip 15, all is 3 in the present embodiment; These at least two led chips 15 produce the light of different wave length and cover the boundary scope of pilot hole 24 and cell 21 just, as shown in Figure 2, this output pin 13 and at least two input pins 14 make at least two led chips 15 access to circuit board, so under the control of circuit board, these at least two led chips 15 can be selected one and light, to produce the light of different wave length.

Like this, the utility model relates to a kind of single lamp pearl hyperchannel colorimetric system 100, and it is by arranging dichromatism LED lamp 1 at least, compared with prior art, it only needs a pilot hole 24 to get final product, and need not to arrange a plurality of lamp holes and unthreaded hole, simplify the structure of equipment greatly, reduced difficulty of processing; In addition, by to the adjustment of led chip 15 in encapsulation, can guarantee that light that each led chip 15 produces covers the boundary scope of pilot hole 24 and cell 21 just when lighting, can guarantee that so light is vertical with cuvette 22, guarantee accuracy of detection.

As shown in Figure 4, this colorimetric system 100 also comprises MCU unit 41, A/D modular converter 42, D/A modular converter 43 and PMW control module 44, this photoelectric sensor 3 links to each other with MCU unit 41 by A/D modular converter 42, thereby with the information feedback of current light to MCU unit 41, this MCU unit 41 links to each other with dichromatism LED lamp 1 at least with PMW control module 44 by D/A modular converter 43 successively, thereby can adjust dichromatism LED lamp 1 at least by PMW control module 44, the monochromatic luminous intensity of generation standard is to remedy the problem that causes the LED lamp efficiency to descend based on the rising of service time and frequency.So, the utility model also has effects such as degree of accuracy height, long service life.

In the utility model, this MCU unit 41 is single-chip microcomputer, according to different test items, and the initial LED light intensity AD value of the disparity items correspondence that in single-chip microcomputer, prestored.After the start, corresponding different test items, software extracts the corresponding A value automatically, by corresponding software algorithm, be converted into different digital signals and export to D/A modular converter 43, D/A modular converter 43 produces corresponding drive current, and the pulse by PMW control module 44 produces different duty comes driving LED.

Photoelectric sensor 3 produces corresponding signal after receiving the light that the LED of different wave length sends out, and after amplifying A/D and converting digital signal to, by MCU unit 41 this signal is handled.Since the environment temperature difference, the components and parts interindividual variation, electromagnetic interference (EMI), various influences such as the aging decay of lamp pearl are disturbed, and cause the unstable or fluctuation of luminous intensity of LED lamp, and corresponding photoelectric sensor 3 detected signals also are unsettled.When MCU unit 41 receives light intensity signal, can compare accordingly with filtering with the initial value of original setting and handle, produce the corresponding Processing Algorithm of following the tracks of, adjust the output valve of output, thereby adjust the drive current of subsequent conditioning circuit, reach the purpose of stablizing the LED luminous intensity, finally do not influence testing result.

Above-described embodiment and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present utility model to its suitable variation or modification of doing.

Claims

1. a single lamp pearl hyperchannel colorimetric system comprises sensing chamber and photoelectric sensor, has the cell that several can place cuvette in this sensing chamber, and the one side of each cell has the detection hole of placing photoelectric sensor; It is characterized in that, this colorimetric system also comprises dichromatism LED lamp at least, the another side of each cell has be used to placing the pilot hole of dichromatism LED lamp at least, this at least dichromatism LED light fixture substrate is arranged, lampshade, output pin, at least two input pins and be positioned at lampshade and towards at least two luminous led chips of lampshade, the quantity of this input pin equates with the quantity of led chip, these at least two led chips produce the light of different wave length and cover the boundary scope of pilot hole and cell just, and this output pin and at least two input pins make at least two led chips access to circuit board.

2. a kind of single lamp pearl hyperchannel colorimetric system as claimed in claim 1, it is characterized in that, this colorimetric system also comprises MCU unit, A/D modular converter, D/A modular converter and PMW control module, this photoelectric sensor is by A/D modular converter and linking to each other with the MCU unit, and this MCU unit passes through the D/A modular converter successively with the PMW control module and links to each other with dichromatism LED lamp at least.