TWM461046U - Simple type spectrometer - Google Patents

Description

Simple spectroscopy instrument

This creation is about a spectroscopic instrument, especially a simple spectroscopic instrument for an electronic circuit.

During the generation of the light source, the light sources of different frequencies are released because of the different transition levels. Light sources of different frequencies will have different colors. However, the light source can be divided into visible light and non-visible light. The science of studying the spectrum of emission of an object is called spectroscopy.

Since all substances have the property of absorbing and reflecting light, different substances or the same substance exist in different concentrations of solution to absorb and reflect light of different wavelengths or different degrees. Therefore, in simple terms, an object presents a certain color, that is, the object reflects light of a wavelength of the color and absorbs light of the remaining wavelength. Taking a green object as an example, the green light reflected by the object is displayed, and the light of the remaining wavelengths is absorbed.

A spectrometer is a scientific instrument that can decompose a complex component of light into a spectral line. It is generally composed of elements such as chirped or diffraction gratings. The spectrometer can be used to measure the light absorbed and reflected on the surface of the object.

Spectrometers or spectrophotometers are often used in biological experiments to determine whether a solution contains a specific substance and its concentration. The principle is that each atom, molecule and chemical bond can absorb light, so each substance contains a different Absorption spectroscopy, for example, cytosine and adenine have different chemical structures, and their absorption spectra are different. Therefore, the difference in the identification of absorption spectra can be used to distinguish different substances. Second, use a certain wavelength of light When a solution is irradiated, since the substance in the solution can absorb a part of the light, the amount of light absorbed is proportional to the concentration of the substance in the solution, whereby the concentration of the solute in the solution can be determined.

Spectrometers and spectrophotometers generally contain four parts: light source, filter, sample and photometric detector:

(1) Light source: used to provide white light, which is composed of many different wavelengths of colored light.

(2) Filter: used to generate light of different wavelengths. One 稜鏡 divides visible light into red, orange, yellow, green, and purple colored light. Use the angle of the 稜鏡 to select a specific wavelength of light, or use different colors of filtering. The film uses different wavelengths of light.

(3) Sample: placed in the measuring tube. When the measuring tube is filled with the solution, the measuring tube placed in the photometer is placed in the sample tank to measure the absorbance.

(4) Photometric detector: It can convert light into electric current. Its function is to detect the intensity of transmitted light, and then the absorption or penetration value is displayed by the instrument on the instrument. These values are generated by the photometric detector. The amount of current is converted.

Since the spectrometer and the spectrophotometer can decompose the light and display and analyze it by computerized automatic display numerical instruments, it can know which elements are contained in the surrogate and the detection result is very accurate. Therefore, the spectrometer is widely used. Metallurgy, geology, petrochemical, medical and health, environmental protection, and more is an essential instrument for military reconnaissance, space exploration, resources and hydrological surveys. However, spectrometers and their computerized automatic display of numerical instruments, prices Expensive, it is neither economical nor cost-effective to use expensive spectrometers during an experiment that only requires a rough estimate.

In view of this, the author has studied and discussed the above-mentioned problems, and through extensive analysis, finally developed a simple spectroscopy instrument to improve the above-mentioned lack.

The main purpose of this creation is to provide a simple spectroscopy instrument that utilizes a light source sensing amplifying circuit, an optical driving circuit, and an analog digital converter, and is simply composed of an electronic circuit structure without using a filter, 稜鏡 or Complex and expensive components such as diffraction gratings, thereby greatly reducing the manufacturing cost of the spectrometer.

In order to achieve the above purpose, the present invention provides a simple spectroscopic instrument comprising a light source sensing amplifying circuit, an optical driving circuit and an analog digital converter, the light source sensing amplifying circuit has a light emitting diode, and the light emitting diode can be a divergent light source. And the light source sensing and amplifying circuit can detect and calculate the value of the light source to detect the object to be tested by using the intensity change of the light source and obtain the voltage value thereof for use as the molecular concentration value of the object to be tested, and the optical driving circuit electrical property The light source sensing and amplifying circuit is connected to adjust the intensity of the light source, and the analog digital converter is electrically connected to the light source sensing and amplifying circuit, and the voltage value can be converted into a digital signal.

The purpose of the present invention, the technical content, the features, and the effects achieved by the present invention will be more readily understood by the specific embodiments and the accompanying drawings.

10‧‧‧Simplified Spectrometer

12‧‧‧Light source sensing amplifier circuit

14‧‧‧Light drive circuit

16‧‧‧ Analog Digital Converter

18‧‧‧Lighting diode

20‧‧‧ display

22‧‧‧Timer

24‧‧‧Power supply

26‧‧‧Compensation voltage adjustment unit

28‧‧‧Gain adjustment unit

30‧‧‧Adjustable switch

32‧‧‧Slope switch

The first picture is a block diagram of the simple spectrum instrument circuit of the creation.

Figure 2 is a block diagram of a simple spectrum instrument circuit with a new timer for this creation.

The third figure is a circuit block diagram of the compensation voltage adjustment unit and the gain adjustment unit of the present invention.

Figure 4 is a block diagram of a simple spectrum instrument circuit with a new adjustment switch.

Figure 5 is a block diagram of a simple spectrum instrument circuit with a new ramp switch.

Figure 6 is a block diagram of a simple spectrum instrument circuit with a new adjustment switch and a ramp switch.

This application lists an embodiment here, and refers to FIG. 1 to illustrate a block diagram of a simple spectrum instrument circuit of the present invention. As shown in the figure, a simple spectrum instrument 10 of the present invention includes a light source sensing amplification circuit 12, The light-driven circuit 14 and the analog-to-digital converter 16 have a light-emitting diode 18, and the light-emitting diode 18 can diverge the light source, and the light-sensing and amplifying circuit 12 can detect and calculate the value of the light source. The light source circuit 14 is electrically connected to the light source sensing and amplifying circuit 12 to adjust the intensity of the light source, and the analogous digit The converter 16 is electrically connected to the light source sensing and amplifying circuit 12, and converts the voltage value into a digital signal. The display 20 is electrically connected to the analog digital converter 16 for displaying the digital signal. Further, as described above, the light source has a wavelength of between 380 nm and 750 nm.

Continued, refer to Figure 2, to illustrate the block diagram of the simple spectrum instrument circuit with the new timer of this creation. As shown in the figure, the simple spectrum instrument 10 of this creation can add the timer 22 to electrically connect the light source to sense. The amplifying circuit 12 is configured to calculate the detection time of the object to be tested. At this time, the display 20 can also be electrically connected to the analog digital converter 16 and the timer 22 to display the digital signal or the detection time.

Referring to FIG. 2, the simple spectrum apparatus 10 of the present invention comprises a power supply 24 electrically connected to the light source sensing and amplifying circuit 12, an optical driving circuit 14 and an analog digital converter 16, and the power supply 24 can obtain an alternating current externally. And converting the alternating current into direct current, and the power supply 24 can provide direct current to the light source sensing amplifying circuit 12, the optical driving circuit 14, and the analog digital converter 16.

Referring to FIG. 3, a circuit block diagram of the offset voltage adjusting unit and the gain adjusting unit of the present invention is illustrated. As shown in the figure, the light source sensing and amplifying circuit 12 of the present invention further includes an offset voltage adjusting unit 26 and a gain adjusting unit. 28, the offset voltage adjustment unit 26 is electrically connected to the optical drive circuit 14, the analog-to-digital converter 16 and the light-emitting diode 18 to analyze the value of the light source. When the value of the light source is zero, the offset voltage adjusting unit 26 can output the voltage value to zero. The light source sensing and amplifying circuit 12 further includes a gain adjusting unit 28 electrically connected to the light driving circuit 14, the analog digital converter 16 and the light emitting diode 18 for analyzing the value of the light source. When the value of the light source is full, the gain is obtained. The adjustment unit 28 can output a voltage value to a rated voltage value.

Continued, refer to Figure 4, Figure 5 and Figure 6 to illustrate the block diagram of the simple spectrum instrument circuit with new adjustment switch and the block diagram of the simple spectrum instrument circuit with new ramp switch. As shown in the figure, the optical drive circuit 14 of the present invention includes an adjustable switch 30 electrically connected to the light-emitting diode 18, and the adjustable switch 30 can be fixed. The intensity of the light source or the intensity of the light source. The light driving circuit 14 includes a ramp switch 32 electrically connected to the light emitting diode 18, and the ramp switch 32 can fix the intensity of the light source or provide the intensity of the light source in a gradual manner.

In addition, as shown in FIG. 4, the present optical driving circuit 14 can also include an adjustable switch 30 and a ramp switch 32 electrically connected to the LEDs 18, respectively. Therefore, when the present invention selectively uses the adjustment switch 30 or the ramp switch 32, the implementation cost can be reduced. If the optical drive circuit 14 includes both the adjustment switch and the ramp switch, the adjustment of the light source can be increased. The versatility of the strength mode.

According to the comparison between the simple spectral instrument 10 and the spectrometer on the market, the author will use glucose detection to investigate the error between the simple spectrometer and the commercially available ultraviolet visible spectrometer. as follows:

(1) Dispense 100 ml of glucose standard solution and configure 100 deciliters of glucose detection reagent.

(2) Each experiment was mixed with glucose solution, distilled water and glucose reagent according to the following table, and the glucose detection solutions of different concentrations were arranged to be injected into the quartz test tube.

(3) Each quartz test tube was subjected to the experiment of Table 1 below using a simple spectrometer 10 and a commercially available ultraviolet visible spectrometer, and the absorbance was recorded.

The data of the measured absorbance values of Table 1 according to the simple spectrum instrument 10 created by the present invention are as follows: Wherein I _{1 of} Table 2 refers to the intensity of transmitted light, I ₀ refers to the intensity of the original light, and the absorbance value = log(I ₀ )-log(I ₁ ).

The measured absorbance values of Table 1 according to the general commercially available ultraviolet-visible spectrometer are shown in Table 3 below:

The simple spectral instrument 10 of the present invention and the commercially available ultraviolet light visible spectrometer have the absorbance values measured in each experiment and the absorbance values of the standard glucose solution (concentration 100 mg/dl), and the glucose concentration to be measured is calculated by the following formula. :

Table 4 below is a comparison of the glucose concentrations obtained after conversion of each experiment:

It is known from the above that the simple spectral instrument 10 of the present invention and the commercially available ultraviolet visible light spectrometer have an error value of only 3%-4%.

In summary, the technical idea of this creation is mainly to provide a simple spectrum instrument, which uses a light source sensing amplifying circuit, an optical driving circuit and an analog digital converter, and uses a simple electronic circuit for architecture and composition without using filtering. Complex and expensive components such as sheets, ridges or diffraction gratings, thereby greatly reducing the manufacturing cost of the spectrometer.

The embodiments described above are only preferred embodiments of the present invention, and the features of the present invention are described by way of examples, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and implement them, and is not intended to be limited. The scope of this creation. Equivalent changes and modifications to the structure, shape, characteristics and spirit described in the application for the scope of the patent application should be included in the scope of the patent application.

10‧‧‧Simplified Spectrometer

12‧‧‧Light source sensing amplifier circuit

14‧‧‧Light drive circuit

16‧‧‧ Analog Digital Converter

18‧‧‧Lighting diode

20‧‧‧ display

Claims (10)

A simple spectrum instrument comprises: a light source sensing and amplifying circuit, having a light emitting diode, wherein the light emitting diode can emit a light source, and the light source sensing and amplifying circuit can detect and calculate the value of the light source, Using the intensity change of the light source to detect a test object and obtain a voltage value thereof for use as a molecular concentration value of the test object; an optical drive circuit electrically connecting the light source sense amplification circuit to adjust the light source And an analog-type digital converter electrically connected to the light source sensing amplification circuit to convert the voltage value into a digital signal. The simple spectroscopy apparatus of claim 1, wherein the optical driving circuit further comprises: an adjustment switch electrically connected to the illuminating diode, the adjusting switch fixing the intensity of the light source or adjusting the intensity of the light source . The simple spectroscopy apparatus of claim 1, wherein the optical driving circuit further comprises: a ramp switch electrically connected to the light emitting diode, wherein the ramp switch can fix the intensity of the light source or increase the intensity Provide the intensity of the light source. The simple spectroscopy apparatus of claim 1, further comprising: a display electrically connected to the analog digital converter to display the digital signal. The simple spectroscopy apparatus of claim 1, further comprising: a timer electrically connected to the light source sensing and amplifying circuit to calculate a detection time of the object to be tested. The simple spectroscopy apparatus of claim 5, further comprising: a display electrically connected to the analog-to-digital converter and the timer to display the digital signal or the detection time. The simple spectrum instrument of claim 1, wherein the light source sensing and amplifying circuit further comprises: an offset voltage adjusting unit electrically connecting the light emitting diode and the light driving circuit to analyze the value of the light source When the value of the light source is zero, the offset voltage adjusting unit can output the voltage value to zero. The simple spectroscopy apparatus of claim 1, wherein the light source sensing and amplifying circuit further comprises: a gain adjusting unit electrically connecting the light emitting diode and the light driving circuit to analyze the value of the light source, when When the value of the light source is full, the gain adjustment unit can output the voltage value to a rated voltage value. The simple spectroscopy apparatus according to claim 1, further comprising: a power supply, electrically connecting the light source sensing and amplifying circuit, the optical driving circuit and the analog digital converter, wherein the power supply can convert an alternating current The power supply is continuously supplied, and the power supply can supply the direct current to the light source sensing and amplifying circuit, the optical driving circuit and the analog digital converter. A simple spectroscopic instrument as claimed in claim 1, wherein the wavelength of the light source is between 380 nm and 750 nm.