CN104792712A - Position triangle wave coding array type transmission light measurement system - Google Patents

Abstract

The invention discloses a position triangle wave coding array type transmission light measurement system, which comprises a group of monochromatic light sources, a group of photosensitive devices and a computer externally connected with the photosensitive devices, wherein the monochromatic light sources and the photosensitive devices are distributed on the two sides of a measured sample; triangle waves in a frequency coupling relationship are adopted for driving the light sources with various wavelengths in monochromatic light source units respectively, and photoelectric signal combinations, penetrating through the sample, of each light source are received by each photosensitive device in photosensitive device groups; the photoelectric signal combinations are demodulated and separated to obtain optical spectrums by virtue of the computer, and the optical spectrums obtained by all the photosensitive devices are arranged to obtain a total optical spectrum; material components of the sample are analyzed by the computer through the total optical spectrum. According to the system, the material components in the sample can be accurately analyzed through the total optical spectrum; the system has the advantages of simple circuit structure, low device and process requirements, easiness in debugging, high reliability, small calculated amount and the like.

Description

The array transmission light measurements system of a kind of position triangular wave coding

Technical field

The present invention relates to transmission light measurements system regions, particularly relate to the array transmission light measurements system of a kind of position triangular wave coding.

Background technology

Adopt spectral analysis Matter Composition to be a kind of high precision, fast, not need adjuvant nonpolluting method, be thus widely used in the every field such as industry, food, environmental protection and agricultural.

Inventor is realizing finding at least there is following shortcoming and defect in prior art in process of the present invention:

Existing method adopts expensive spectrometer, not high enough to the sample analysis precision of the various ingredients of spectra overlapping, and data volume is large, and analysis time is grown and the shortcomings such as complexity.

Summary of the invention

The invention provides the array transmission light measurements system of a kind of position triangular wave coding, present invention achieves the high-acruracy survey to material composition, and circuit structure is simple, meets the multiple needs in practical application, described below:

The array transmission light measurements system of a kind of position triangular wave coding, described array transmission light measurements system comprises: one group of monochromatic source, one group of photosensitive device, and the computing machine external with photosensitive device, monochromatic source and photosensitive device are distributed in the both sides of sample;

Adopt the triangular wave of 2 overtones band relations to drive the light source of each wavelength in sets of monochromatic light sources respectively, realize the coding to Different Light, each photosensitive device in photosensitive device group receives each light source and combines through the photosignal of sample;

Carry out demodulation separation by described computing machine to photosignal combination and obtain spectrum, the spectrum obtained by whole photosensitive device carries out arrangement and obtains total spectrum;

Described computing machine realizes analyzing the material composition of sample by described total spectrum.

Wherein, the quantity of each light source in sets of monochromatic light sources is more than or equal to the material composition number in sample, and the quantity of each photosensitive device in photosensitive device group is more than or equal to the material composition number in sample.

Further, described light source and described photosensitive device are evenly and equity arrangement.

Another embodiment, described light source is laser diode, and described photosensitive device is photodiode.

Another embodiment, described light source is monochrome photodiode, and described photosensitive device is photodiode.

Another embodiment, described light source be monochromatic filter plate to the monochromatic light obtained after white light filtering, described photosensitive device is photodiode.

Another embodiment, described light source is laser diode, and described photosensitive device is photomultiplier.

Another embodiment, described light source is monochrome photodiode, and described photosensitive device is photomultiplier.

Another embodiment, described light source be monochromatic filter plate to the monochromatic light obtained after white light filtering, described photosensitive device is photomultiplier.

The beneficial effect of technical scheme provided by the invention is: the present invention adopts the triangular wave of 2 overtones band relations to drive monochromatic source, the photosignal detected photosensitive device carries out separation and obtains spectrum, the spectral combination obtained by all photosensitive devices gets up to obtain total spectrum, high accuracy analysis can be carried out to the material composition in sample by total spectrum, the present invention has that circuit structure is simple, device and technological requirement is low, debugging easily, the advantage such as the high and calculated amount of reliability is little.

Accompanying drawing explanation

Fig. 1 is the structural representation of the array transmission light measurements system of a kind of position triangular wave coding;

Fig. 2 is the schematic diagram of triangular wave.

Embodiment

For making the object, technical solutions and advantages of the present invention clearly, below embodiment of the present invention is described further in detail.

Embodiment 1

An array transmission light measurements system for position triangular wave coding, see Fig. 1 and Fig. 2, described array transmission light measurements system comprises: one group of monochromatic source LD ₁lD _n, one group of photosensitive device PD ₁pD _nn>=3 and be odd number (wherein, n is odd number, then middle light source or photosensitive device can be used as center line, are convenient to aim at arrangement, wherein, the concrete value of n is relevant to the cross-sectional area of sample 2, the embodiment of the present invention does not limit this), and the computing machine (not shown) external with photosensitive device, monochromatic source LD ₁lD _nwith photosensitive device PD ₁pD _nbe distributed in the both sides of sample;

The triangular wave of 2 overtones band relations is adopted to drive each wavelength X in sets of monochromatic light sources respectively _ilight source LD _i, wherein, suppose that triangle wave frequency is respectively f ₁, f ₂f _n, then f ₁=2f ₂, f ₂=2f ₃f _n-1=2f _n.

Each photosensitive device PD in photosensitive device group _jreceive each light source LD _ithrough the photosignal combination I of sample _j; Computing machine combines I to photosignal _jcarry out demodulation separation and can obtain spectrum I _j1, I _j2, I _j3... I _jn.The spectrum obtained by whole photosensitive device carries out arranging total spectrum that can obtain this array transmission light measurements system and obtain,

That is: I ₁₁, I ₁₂... I _1n, I ₂₁, I ₂₂... I _2n, I ₃₁... I _n1, I _n2... I _nn.Computing machine can adopt existing ripe modeling method to analyze to the material composition of sample by total spectrum.

Wherein, computing machine combines I to photosignal _jcarry out separation and can obtain spectrum I _j1, I _j2, I _j3... I _jnoperation be specially:

1) LD to drive monochromatic source is supposed _jhighest frequency f _max(f in these cases _max=f ₁) 4M speed sampling f is carried out to photosignal _s=4M × f _max, obtain sampled signal x (m), wherein M be more than or equal to 1 positive integer;

$x\left(m\right)=\underset{i=0}{\overset{M-1}{\mathrm{\Σ}}}x(4\mathrm{lm}+i),l=\mathrm{0,1,2}......\left(1\right)$

2) computing machine will add up to the sampled signal in the positive and negative half period in each triangular wave cycle corresponding to each wavelength respectively, and accumulation result carries out asking difference operation;

That is, obtain cumulative sum by cumulative for the sampled value of the positive half period of each triangular wave in certain hour (an integer triangular wave cycle), the sampled value of the negative half period of each triangular wave is cumulative obtains cumulative sum, and these two cumulative sums are subtracted each other.

3) difference of each wavelength above-mentioned is carried out k _minindividual cycle or integral multiple k _minindividual periodic accumulation, can obtain the spectral value of each wavelength.Wherein:

$k_{\min }=\frac{a\frac{1}{f_{\min }}}{\frac{1}{f_n}}---\left(2\right)$

In formula: f _minfor the low-limit frequency in excitation triangular wave; A is preset constant, value be more than or equal to 1 positive integer, a/f _minfor the cycle of lower sampling; f _nfor the triangular wave excitation frequency of handled wavelength.

To amplitude be x be sampled value, if uniform sampling N (>>1) puts and is averaged within the regular hour, the mean value obtained is

$\stackrel{\‾}{x}=\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\left[x_i\right]=\frac{1}{N}N\left(\right[x]+{\mathrm{\Δx}}_i)=\left[x\right]+{\mathrm{\Δx}}_i---\left(3\right)$

Wherein, [x] is that analog to digital converter quantizes x, is also the positive integer that round off rounding obtains.X _ithe amplitude of i-th, [x _i] be that analog to digital converter is to x _iquantizing, is also the positive integer that round off rounding obtains.

(3) formula shows, the signal sampling one being compared to " totally " is repeatedly averaged, and can not improve its precision, and the error of the mean value obtained is identical with the error of unitary sampling, is Δ x _i.

If to amplitude be x be sampled sawtooth wave, within the regular hour, uniform sampling N (>>1) puts and is averaged equally, and the mean value obtained is

$\stackrel{\‾}{x}=\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\left[x\right]=\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}[m_i+{\mathrm{\Δx}}_i]---\left(4\right)$

Wherein, x _i=m _i+ Δ x _i, m _i=[x _i].Also be m _ithat rounding obtains positive integer, and Δ x _iit is " at random " error of losing after being rounded.

(4) formula can utilize arithmetic series sum formula to obtain further:

$\begin{array}{c}\stackrel{\‾}{x}=\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{m}_i+\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\Δx}}_i=\frac{1}{N}\frac{1}{2}(0+[x\left]\right)N+\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\Δx}}_i\\ =\frac{1}{2}\left[x\right]+\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\Δx}}_i\end{array}---\left(5\right)$

(5) the last item in formula is the value after quantizing, although less than the result of (3) formula half, according to theory of errors, the precision of data does not change because being multiplied by a fixing non-zero constant.But be the random number of zero-mean in one next, compare will reduce in (3) formula doubly, therefore, the effect of the precision that can be improved equally after over-sampling is carried out to sawtooth wave or triangular wave pumping signal, and do not need another external high-frequency disturbing signal.

During practical application, each light source LD in sets of monochromatic light sources _iquantity be more than or equal to material composition number in sample, each photosensitive device PD in photosensitive device group _jquantity be more than or equal to material composition number in sample.

Wherein, light source LD _iwith photosensitive device PD _jevenly and equity arrangement, arrangement meet following relation: l ₁> > l ₂, l ₃> > l ₂, wherein l ₁and l ₃for the distance of array optical sensing device and sample up-and-down boundary, l ₂for array light source LD _iwith photosensitive device PD _jspacing.

The embodiment of the present invention is to the model of each device except doing specified otherwise, and the model of other devices does not limit, as long as can complete the device of above-mentioned functions.

Embodiment 2

An array transmission light measurements system for position triangular wave coding, see Fig. 1 and Fig. 2, this embodiment is using laser diode as monochromatic source LD ₁lD _n, photodiode is as photosensitive device PD ₁pD _nfor example is described.Laser diode and photodiode are distributed in the both sides of sample;

The triangular wave of 2 overtones band relations is adopted to drive each wavelength X in sets of monochromatic light sources respectively _ilaser diode LD _i, wherein, suppose that triangle wave frequency is respectively f ₁, f ₂f _n, then f ₁=2f ₂, f ₂=2f ₃f _n-1=2f _n.

Photodiode PD _jreceive the photosignal combination I of each laser diode through sample _j; Computing machine combines I to photosignal _jcarry out demodulation separation and can obtain spectrum I _j1, I _j2, I _j3... I _jn.The spectrum obtained by whole photodiode carries out arranging total spectrum that can obtain this array transmission light measurements system and obtain,

That is: I ₁₁, I ₁₂... I _1n, I ₂₁, I ₂₂... I _2n, I ₃₁... I _n1, I _n2... I _nn.Computing machine can adopt existing ripe modeling method to analyze to the material composition of sample by total spectrum.

Wherein, computing machine combines I to photosignal _jcarry out demodulation separation and can obtain spectrum I _j1, I _j2, I _j3... I _jnoperation identical with embodiment 1, the embodiment of the present invention does not repeat this.

During practical application, laser diode LD _iquantity be more than or equal to material composition number in sample, photodiode PD _jquantity be more than or equal to material composition number in sample.

Wherein, laser diode LD _iwith photodiode PD _jevenly and equity arrangement, arrangement meet following relation: l ₁> > l ₂, l ₃> > l ₂, wherein l ₁and l ₃for the distance of array optical sensing device and sample up-and-down boundary, l ₂for array light source LD _iwith photosensitive device PD _jspacing.

The embodiment of the present invention is to the model of each device except doing specified otherwise, and the model of other devices does not limit, as long as can complete the device of above-mentioned functions.

Embodiment 3

An array transmission light measurements system for position triangular wave coding, see Fig. 1 and Fig. 2, this embodiment is using monochrome photodiode as monochromatic source LD ₁lD _n, photodiode is as photosensitive device PD ₁pD _nfor example is described.Monochrome photodiode and photodiode are distributed in the both sides of sample;

The triangular wave of 2 overtones band relations is adopted to drive each wavelength X in sets of monochromatic light sources respectively _imonochrome photodiode LD _i, wherein, suppose that triangle wave frequency is respectively f ₁, f ₂f _n, then f ₁=2f ₂, f ₂=2f ₃f _n-1=2f _n.

Photodiode PD _jreceive the photosignal combination I of each monochrome photodiode through sample _j; Computing machine combines I to photosignal _jcarry out demodulation separation and can obtain spectrum I _j1, I _j2, I _j3... I _jn.The spectrum obtained by whole photodiode carries out arranging total spectrum that can obtain this array transmission light measurements system and obtain,

That is: I ₁₁, I ₁₂... I _1n, I ₂₁, I ₂₂... I _2n, I ₃₁... I _n1, I _n2... I _nn.Computing machine can adopt existing ripe modeling method to analyze to the material composition of sample by total spectrum.

Wherein, computing machine combines I to photosignal _jcarry out demodulation separation and can obtain spectrum I _j1, I _j2, I _j3... I _jnoperation identical with embodiment 1, the embodiment of the present invention does not repeat this.

During practical application, monochrome photodiode LD _iquantity be more than or equal to material composition number in sample, photodiode PD _jquantity be more than or equal to material composition number in sample.

Wherein, monochrome photodiode LD _iwith photodiode PD _jevenly and equity arrangement, arrangement meet following relation: l ₁> > l ₂, l ₃> > l ₂, wherein l ₁and l ₃for the distance of array optical sensing device and sample up-and-down boundary, l ₂for array light source LD _iwith photosensitive device PD _jspacing.

The embodiment of the present invention is to the model of each device except doing specified otherwise, and the model of other devices does not limit, as long as can complete the device of above-mentioned functions.

Embodiment 4

An array transmission light measurements system for position triangular wave coding, see Fig. 1 and Fig. 2, this embodiment using monochromatic filter plate to monochromatic light after white light filtering as light source LD ₁lD _n, photodiode is as photosensitive device PD ₁pD _nfor example is described.Monochromatic filter plate and photodiode are distributed in the both sides of sample;

The triangular wave of 2 overtones band relations is adopted to drive each wavelength X in sets of monochromatic light sources respectively _imonochromatic filter plate to the filtered monochromatic light LD of white light _i, wherein, suppose that triangle wave frequency is respectively f ₁, f ₂f _n, then f ₁=2f ₂, f ₂=2f ₃f _n-1=2f _n.

Photodiode PD _jreceive the photosignal combination I of each monochromatic light through sample _j; Computing machine combines I to photosignal _jcarry out demodulation separation and can obtain spectrum I _j1, I _j2, I _j3... I _jn.The spectrum obtained by whole photodiode carries out arranging total spectrum that can obtain this array transmission light measurements system and obtain,

That is: I ₁₁, I ₁₂... I _1n, I ₂₁, I ₂₂... I _2n, I ₃₁... I _n1, I _n2... I _nn.Computing machine can adopt existing ripe modeling method to analyze to the material composition of sample by total spectrum.

Wherein, computing machine combines I to photosignal _jcarry out demodulation separation and can obtain spectrum I _j1, I _j2, I _j3... I _jnoperation identical with embodiment 1, the embodiment of the present invention does not repeat this.

During practical application, monochromatic filter plate is to the filtered monochromatic light LD of white light _iquantity be more than or equal to material composition number in sample, photodiode PD _jquantity be more than or equal to material composition number in sample.

Wherein, monochromatic filter plate is to the filtered monochromatic light LD of white light _iwith photodiode PD _jevenly and equity arrangement, arrangement meet following relation: l ₁> > l ₂, l ₃> > l ₂, wherein l ₁and l ₃for the distance of array optical sensing device and sample up-and-down boundary, l ₂for array light source LD _iwith photosensitive device PD _jspacing.

The embodiment of the present invention is to the model of each device except doing specified otherwise, and the model of other devices does not limit, as long as can complete the device of above-mentioned functions.

Embodiment 5

An array transmission light measurements system for position triangular wave coding, see Fig. 1 and Fig. 2, this embodiment is using laser diode as monochromatic source LD ₁lD _n, photomultiplier is as photosensitive device PD ₁pD _nfor example is described.Laser diode and photomultiplier are distributed in the both sides of sample;

The triangular wave of 2 overtones band relations is adopted to drive each wavelength X in sets of monochromatic light sources respectively _ilaser diode LD _i, wherein, suppose that triangle wave frequency is respectively f ₁, f ₂f _n, then f ₁=2f ₂, f ₂=2f ₃f _n-1=2f _n.

Photomultiplier PD _jreceive the photosignal combination I of each laser diode through sample _j; Computing machine combines I to photosignal _jcarry out demodulation separation and can obtain spectrum I _j1, I _j2, I _j3... I _jn.The spectrum be in control by whole photomultiplier transit carries out arranging total spectrum that can obtain this array transmission light measurements system and obtain,

That is: I ₁₁, I ₁₂... I _1n, I ₂₁, I ₂₂... I _2n, I ₃₁... I _n1, I _n2... I _nn.Computing machine can adopt existing ripe modeling method to analyze to the material composition of sample by total spectrum.

Wherein, computing machine combines I to photosignal _jcarry out demodulation separation and can obtain spectrum I _j1, I _j2, I _j3... I _jnoperation identical with embodiment 1, the embodiment of the present invention does not repeat this.

During practical application, laser diode LD _iquantity be more than or equal to material composition number in sample, photomultiplier PD _jquantity be more than or equal to material composition number in sample.

Wherein, laser diode LD _iwith photomultiplier PD _jevenly and equity arrangement, arrangement meet following relation: l ₁> > l ₂, l ₃> > l ₂, wherein l ₁and l ₃for the distance of array optical sensing device and sample up-and-down boundary, l ₂for array light source LD _iwith photosensitive device PD _jspacing.

Embodiment 6

An array transmission light measurements system for position triangular wave coding, see Fig. 1 and Fig. 2, this embodiment is using monochrome photodiode as monochromatic source LD ₁lD _n, photomultiplier is as photosensitive device PD ₁pD _nfor example is described.Monochrome photodiode and photomultiplier are distributed in the both sides of sample;

The triangular wave of 2 overtones band relations is adopted to drive each wavelength X in sets of monochromatic light sources respectively _imonochrome photodiode LD _i, wherein, suppose that triangle wave frequency is respectively f ₁, f ₂f _n, then f ₁=2f ₂, f ₂=2f ₃f _n-1=2f _n.

Photomultiplier PD _jreceive the photosignal combination I of each monochrome photodiode through sample _j; Computing machine combines I to photosignal _jcarry out demodulation separation and can obtain spectrum I _j1, I _j2, I _j3... I _jn.The spectrum be in control by whole photomultiplier transit carries out arranging total spectrum that can obtain this array transmission light measurements system and obtain,

That is: I ₁₁, I ₁₂... I _1n, I ₂₁, I ₂₂... I _2n, I ₃₁... I _n1, I _n2... I _nn.Computing machine can adopt existing ripe modeling method to analyze to the material composition of sample by total spectrum.

Wherein, computing machine combines I to photosignal _jcarry out demodulation separation and can obtain spectrum I _j1, I _j2, I _j3... I _jnoperation identical with embodiment 1, the embodiment of the present invention does not repeat this.

During practical application, monochrome photodiode LD _iquantity be more than or equal to material composition number in sample, photomultiplier PD _jquantity be more than or equal to material composition number in sample.

Wherein, monochrome photodiode LD _iwith photomultiplier PD _jevenly and equity arrangement, arrangement meet following relation: l ₁> > l ₂, l ₃> > l ₂, wherein l ₁and l ₃for the distance of array optical sensing device and sample up-and-down boundary, l ₂for array light source LD _iwith photosensitive device PD _jspacing.

The embodiment of the present invention is to the model of each device except doing specified otherwise, and the model of other devices does not limit, as long as can complete the device of above-mentioned functions.

Embodiment 7

An array transmission light measurements system for position triangular wave coding, see Fig. 1 and Fig. 2, this embodiment using monochromatic filter plate to monochromatic light after white light filtering as light source LD ₁lD _n, photomultiplier is as photosensitive device PD ₁pD _nfor example is described.Monochromatic filter plate and photomultiplier are distributed in the both sides of sample;

The triangular wave of 2 overtones band relations is adopted to drive each wavelength X in sets of monochromatic light sources respectively _imonochromatic filter plate to the filtered monochromatic light LD of white light _i, wherein, suppose that triangle wave frequency is respectively f ₁, f ₂f _n, then f ₁=2f ₂, f ₂=2f ₃f _n-1=2f _n.

Photomultiplier PD _jreceive the photosignal combination I of each monochromatic light through sample _j; Computing machine combines I to photosignal _jcarry out demodulation separation and can obtain spectrum I _j1, I _j2, I _j3... I _jn.The spectrum obtained by whole photodiode carries out arranging total spectrum that can obtain this array transmission light measurements system and obtain,

That is: I ₁₁, I ₁₂... I _1n, I ₂₁, I ₂₂... I _2n, I ₃₁... I _n1, I _n2... I _nn.Computing machine can adopt existing ripe modeling method to analyze to the material composition of sample by total spectrum.

Wherein, computing machine combines I to photosignal _jcarry out demodulation separation and can obtain spectrum I _j1, I _j2, I _j3... I _jnoperation identical with embodiment 1, the embodiment of the present invention does not repeat this.

During practical application, monochromatic filter plate is to the filtered monochromatic light LD of white light _iquantity be more than or equal to material composition number in sample, photomultiplier PD _jquantity be more than or equal to material composition number in sample.

Wherein, monochromatic filter plate is to the filtered monochromatic light LD of white light _iwith photomultiplier PD _jevenly and equity arrangement, arrangement meet following relation: l ₁> > l ₂, l ₃> > l ₂, wherein l ₁and l ₃for the distance of array optical sensing device and sample up-and-down boundary, l ₂for array light source LD _iwith photosensitive device PD _jspacing.

The embodiment of the present invention is to the model of each device except doing specified otherwise, and the model of other devices does not limit, as long as can complete the device of above-mentioned functions.

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (9)

1. the array transmission light measurements system of a position triangular wave coding, described array transmission light measurements system comprises: one group of monochromatic source, one group of photosensitive device, and the computing machine external with photosensitive device, it is characterized in that, monochromatic source and photosensitive device are distributed in the both sides of sample;

Adopt the triangular wave of 2 overtones band relations to drive the light source of each wavelength in sets of monochromatic light sources respectively, realize the coding to Different Light, each photosensitive device in photosensitive device group receives each light source and combines through the photosignal of sample;

Carry out demodulation separation by described computing machine to photosignal combination and obtain spectrum, the spectrum obtained by whole photosensitive device carries out arrangement and obtains total spectrum;

Described computing machine realizes analyzing the material composition of sample by described total spectrum.

2. the array transmission light measurements system of a kind of position according to claim 1 triangular wave coding, is characterized in that,

The quantity of each light source in sets of monochromatic light sources is more than or equal to the material composition number in sample, and the quantity of each photosensitive device in photosensitive device group is more than or equal to the material composition number in sample.

3. the array transmission light measurements system of a kind of position according to claim 1 triangular wave coding, is characterized in that, described light source and described photosensitive device are evenly and equity arrangement.

4. the array transmission light measurements system of a kind of position triangular wave coding according to claim 1 or 2 or 3, it is characterized in that, described light source is laser diode, and described photosensitive device is photodiode.

5. the array transmission light measurements system of a kind of position triangular wave coding according to claim 1 or 2 or 3, it is characterized in that, described light source is monochrome photodiode, and described photosensitive device is photodiode.

6. the array transmission light measurements system of a kind of position triangular wave coding according to claim 1 or 2 or 3, is characterized in that, described light source be monochromatic filter plate to the monochromatic light obtained after white light filtering, described photosensitive device is photodiode.

7. the array transmission light measurements system of a kind of position triangular wave coding according to claim 1 or 2 or 3, it is characterized in that, described light source is laser diode, and described photosensitive device is photomultiplier.

8. the array transmission light measurements system of a kind of position triangular wave coding according to claim 1 or 2 or 3, it is characterized in that, described light source is monochrome photodiode, and described photosensitive device is photomultiplier.

9. the array transmission light measurements system of a kind of position triangular wave coding according to claim 1 or 2 or 3, is characterized in that, described light source be monochromatic filter plate to the monochromatic light obtained after white light filtering, described photosensitive device is photomultiplier.