Design and manufacturing method of digital display spectrometer

Abstract

The invention discloses a design and manufacturing method of a digital display spectrometer. The digital display spectrometer comprises a mechanical part, a power supply part and a measurement digital display part, the mechanical part comprises a base, an adjustable connecting base installed at the bottom end of the base, a fixing rod arranged at the side end of the base, a collimator frame installed at the upper end of the fixing rod, a collimator installed at the upper end of the collimator frame, a rotating shaft rotationally installed in the middle of the base, a flat opening head fixedly installed at the bottom end of the rotating shaft and a potentiometer detachably connected with the lower end of the flat opening head. The objective table, the dial, the telescope connecting frame and the telescope rotation adjusting rod are sequentially and coaxially installed on the rotating shaft from top to bottom, the telescope is installed at the upper end of the telescope connecting frame, and the bulb is arranged at the outer end of the telescope. The power supply part comprises a direct-current stabilized power supply and a Raspberry Pi power adapter; the measuring part comprises a Raspberry Pi, an ADC (Analog to Digital Converter), a return-to-zero button and a display screen; visual errors can be reduced to a great extent, the angle measurement accuracy is improved, and the measurement time is saved.

Description

Technical Field

[0001] The invention relates to the technical field of optical instruments, and in particular to a design and manufacturing method of a digital display spectrometer. Background Art

[0002] The basic optical structure of a spectrometer is the basis of many optical instruments (such as prism spectrometers, grating spectrometers, spectrophotometers, monochromators, etc.), and its applications involve many fields such as chemistry, food safety, materials science, biomedicine, and life sciences. As an optical instrument commonly used in science and engineering departments of universities across the country, the spectrometer has a relatively simple reading principle in theory, but in actual operation, its reading is one of the difficulties encountered by users, which results in users spending a lot of time and energy when using a spectrometer to measure optical related parameters, and it is easy to produce visual reading errors.

[0003] Therefore, in order to solve the above problems, this paper proposes a design and manufacturing method of a digital display spectrometer. Summary of the invention

[0004] The purpose of the present invention is to address the shortcomings of existing spectrometer angle measurement technology and provide a design and manufacturing method for a digital display spectrometer. Users can conveniently use the spectrometer to complete angle measurement, greatly reduce visual errors, improve the accuracy of angle measurement, save measurement time, and realize the digitization and intelligence of spectrometer angle measurement, thereby improving the efficiency and accuracy of angle measurement in optical experiments.

[0005] In order to achieve the above technical effects, the present invention is implemented through the following technical solutions: a design and manufacturing method of a digital display spectrometer, including a mechanical part, a power supply part and a measurement digital display part, characterized in that: the mechanical part includes a base, an adjustable connecting seat installed at the bottom end of the base, a fixing rod arranged at the side end of the base, a collimator rack installed at the upper end of the fixing rod, a collimator installed at the upper end of the collimator rack, a rotating shaft rotatably installed in the middle of the base, a flat starter fixedly installed at the bottom end of the rotating shaft, a potentiometer disassembled and connected to the lower end of the flat starter, a stage, a dial, a telescope connecting frame and a telescope rotating adjustment rod coaxially installed on the rotating shaft from top to bottom, a telescope fixedly installed at the upper end of the telescope connecting frame, and a light bulb arranged at the outer end of the telescope;

[0006] The power supply part includes a DC regulated power supply and a Raspberry Pi power adapter, and the Raspberry Pi power adapter, the potentiometer and the light bulb are all electrically connected to the DC regulated power supply through wires;

[0007] The digital display part includes a Raspberry Pi, an ADC analog-to-digital converter, a zeroing button and a display screen; the Raspberry Pi is electrically connected to a Raspberry Pi power adapter via a wire, the ADC analog-to-digital converter is electrically connected to a potentiometer via a wire, and the zeroing button and the display screen are both electrically connected to a DC regulated power supply via a wire.

[0008] Furthermore, the base is a claw-shaped triangular seat, and the adjustable connecting seat is installed on the three legs of the claw-shaped triangular seat; the adjustable connecting seat includes a screw sleeve fixedly installed at the lower end of the base, an adjusting screw threadedly connected to the screw sleeve, and a placement seat installed at the bottom end of the adjusting screw.

[0009] Furthermore, the size of the lower end of the flat starter is adapted to the potentiometer slot; a sensor is provided at the lower end of the flat starter, and the sensor is a precision conductive plastic potentiometer, and the internal structure is mainly an annular conductive plastic sheet; the working circuit is the same as the sliding rheostat, and when the spectrometer rotates, the sensor is driven to rotate synchronously, the sliding end contact changes, and the output potential also changes accordingly, so that the change in angle can be converted into a change in output potential.

[0010] Furthermore, the collimator rack includes a first mounting rack fixedly mounted on the upper end of a fixed rod, a pitch adjustment screw and a horizontal adjustment screw arranged at both ends of the mounting rack, a first reinforcing rib connecting the mounting rack and the fixed rod, and a mounting ring installed at the ends of the pitch adjustment screw and the horizontal adjustment screw; the collimator is installed inside the mounting ring of the first mounting rack.

[0011] Furthermore, a cursor adjustment rod is sleeved in the middle of the fixing rod, and a locking screw and a fine-tuning screw are arranged on the outside of the cursor adjustment rod; and the end of the cursor adjustment rod is rotatably connected to the rotating shaft.

[0012] Furthermore, the telescope connecting frame includes an L-shaped connecting rod fixedly connected to the rotating shaft, and a second mounting frame arranged at the end of the L-shaped connecting rod; the structure of the second mounting frame is the same as the structure of the parallel light tube frame, and the telescope is installed inside the mounting ring of the second mounting frame.

[0013] Furthermore, the telescope rotation adjustment rod includes a rotating ring rotatably installed on a rotating shaft, a fixing screw arranged at the side end of the rotating ring, a horizontal rod installed at the side end of the rotating ring, and a telescope rotation fine-tuning screw installed at the end of the horizontal rod, and the telescope rotation fine-tuning screw is fixedly connected to the corner of the L-shaped connecting rod.

[0014] Furthermore, the potentiometer is a precision conductive plastic potentiometer with a resistance of 5K ohms, an independent linearity of ±0.1%, and a power of 2W; the working current of the precision conductive plastic potentiometer is 0.50mA to 1.00mA;

[0015] The DC regulated power supply is 5V, and the voltage resolution is 10mV;

[0016] The Raspberry Pi power adapter is 3.3V.

[0017] Furthermore, the communication protocol of the Raspberry Pi, ADC analog-to-digital converter, and display screen is the I2C protocol;

[0018] The ADC analog-to-digital converter is ADS1115;

[0019] The display screen is LCD1602.

[0020] The beneficial effects of the present invention are:

[0021] The present invention provides a design and manufacturing method for a digital display spectrometer, and a user can conveniently use the spectrometer to complete angle measurement, thereby greatly reducing visual errors, improving the accuracy of angle measurement, and saving measurement time. The spectrometer can realize digitization and intelligence of angle measurement, and improve the efficiency and accuracy of angle measurement in optical experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the mechanical structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the internal structure of the mechanical part of the present invention;

[0026] Figure 4 It is a schematic diagram of the actual product structure of the present invention;

[0027] Figure 5 It is the digital display principle diagram of the present invention;

[0028] Figure 6 It is a digital display flow chart of the present invention.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Mechanical part; 11. Base; 12. Adjustable connecting seat; 13. Fixed rod; 131. Vernier dial adjustment rod; 132. Locking screw; 133. Fine adjustment screw; 14. Collimator rack; 141. First mounting bracket; 142. Pitch adjustment screw; 143. Horizontal adjustment screw; 144. First reinforcing rib; 145. Mounting ring; 15. Collimator; 16. Rotating shaft; 17. Flat starter; 18. Potentiometer; 19. Stage; 20. Dial; 21. Telescope connecting bracket; 211. L-shaped connecting rod; 212. Second mounting bracket; 22. Telescope rotation adjustment rod; 23. Telescope; 24. Light bulb; 2. Power supply part; 3. Measurement digital display part. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1

[0033] like Figure 1-4 As shown, a design and manufacturing method of a digital display spectrometer includes a mechanical part 1, a power supply part 2 and a measurement digital display part 3, characterized in that: the mechanical part 1 includes a base 11, an adjustable connecting seat 12 installed at the bottom end of the base 11, a fixing rod 13 arranged at the side end of the base 11, a collimator frame 14 installed at the upper end of the fixing rod 13, a collimator 15 installed at the upper end of the collimator frame 14, a rotating shaft 16 rotatably installed in the middle of the base 11, a flat starter 17 fixedly installed at the bottom end of the rotating shaft 16, a potentiometer 18 disassembled and connected to the lower end of the flat starter 17, a stage 19, a dial 20, a telescope connecting frame 21 and a telescope rotating adjustment rod 22 coaxially installed on the rotating shaft 16 from top to bottom, a telescope 23 fixedly installed at the upper end of the telescope connecting frame 21, and a light bulb 24 arranged at the outer end of the telescope 23;

[0034] The power supply part 2 includes a DC regulated power supply and a Raspberry Pi power adapter, and the Raspberry Pi power adapter, the potentiometer 18 and the light bulb 24 are all electrically connected to the DC regulated power supply through wires;

[0035] The digital display part 3 includes a Raspberry Pi, an ADC analog-to-digital converter, a zeroing button and a display screen; the Raspberry Pi is electrically connected to a Raspberry Pi power adapter via a wire, the ADC analog-to-digital converter is electrically connected to a potentiometer 18 via a wire, and the zeroing button and the display screen are both electrically connected to a DC regulated power supply via a wire.

[0036] The base 11 is a claw-shaped triangular base, and the adjustable connecting base is installed on three legs of the claw-shaped triangular base; the adjustable connecting base 12 includes a screw sleeve fixedly installed at the lower end of the base, an adjusting screw threadedly connected to the screw sleeve, and a placement seat installed at the bottom end of the adjusting screw.

[0037] The size of the lower end of the flat starter 17 is adapted to the slot of the potentiometer 18; a sensor is arranged at the lower end of the flat starter 17, and the sensor is a precision conductive plastic potentiometer, and the internal structure is mainly a ring-shaped conductive plastic sheet. The working circuit is similar to a sliding rheostat. When the spectrometer rotates, the sensor is driven to rotate synchronously, the contact point of the sliding end changes, and the output potential also changes accordingly, so that the change in angle can be converted into a change in output potential. When the device rotates the telescope 23, the sensor coaxially mounted on the rotating shaft 16 can be rotated synchronously, so that the potentiometer 18 can output different potentials according to the rotation angle.

[0038] The collimator frame 14 includes a first mounting frame 141 fixedly mounted on the upper end of the fixed rod 13, a pitch adjustment screw 142 and a horizontal adjustment screw 143 at both ends of the first mounting frame 141, a first reinforcing rib 144 connecting the mounting frame and the fixed rod 13, and a mounting ring 145 mounted at the ends of the pitch adjustment screw 142 and the horizontal adjustment screw 143; the collimator 15 is mounted inside the mounting ring 145 on the first mounting frame 141.

[0039] The middle of the fixing rod 13 is sleeved with a vernier adjustment rod 131, and a locking screw 132 and a fine-tuning screw 133 are arranged on the outside of the vernier adjustment rod 131. ； The end of the cursor adjustment rod 131 is rotatably connected to the rotating shaft 16 .

[0040] The telescope connecting frame 21 includes an L-shaped connecting rod 211 fixedly connected to the rotating shaft 16 and a second mounting frame 212 arranged at the end of the L-shaped connecting rod 211; the structure of the second mounting frame 212 is the same as that of the parallel light tube frame 14, and the telescope is installed inside the mounting ring on the second mounting frame 212.

[0041] The telescope rotation adjustment rod 22 includes a rotating ring rotatably mounted on the rotating shaft 16, a fixing screw arranged at the side end of the rotating ring, a horizontal rod installed at the side end of the rotating ring, and a telescope rotation fine-tuning screw installed at the end of the horizontal rod. The telescope rotation fine-tuning screw is fixedly connected to the corner of the L-shaped connecting rod.

[0042] like Figure 5 The digital display schematic diagram shown has a DC regulated power supply of 5V and a voltage resolution of 10mV. The Raspberry Pi power adapter is 3.3V. The potentiometer is a precision conductive plastic potentiometer with a resistance of 5K ohms, an independent linearity of ±0.1%, and a power of 2W. The working current of the precision conductive plastic potentiometer is 0.50mA to 1.00mA, and 0.66mA is the best.

[0043] like Figure 6 In the digital display flow chart shown, the communication protocol of Raspberry Pi, ADC analog-to-digital converter and display screen is I2C protocol. The ADC analog-to-digital converter is ADS1115. The display screen is LCD1602.

[0044] Example 2

[0045] Working principle: When using this device, first adjust the telescope 23, horizontal light tube 15 and stage level 19 in the same way as a traditional spectrometer. The DC regulated power supply powers the ADS1115 analog-to-digital converter and potentiometer, and the Raspberry Pi power adapter powers the Raspberry Pi. Press the zeroing button and wait for the value on the display to be completely cleared. Slowly rotate the telescope to the desired angle. Read the angle data on the display.

[0046] The DC regulated power supply powers the ADS1115 analog-to-digital converter and the potentiometer, and the Raspberry Pi power adapter powers the Raspberry Pi; when the telescope is rotated, the sensor coaxially mounted with the shaft rotates synchronously, and the potentiometer can output different potentials according to the rotation angle. The voltage value of the potentiometer output pin is read through the ADS1115 analog-to-digital converter connected to the Raspberry Pi, and then the analog quantity is converted into a digital output. The rotation angle of the potentiometer is output on the LCD1602 display screen through the I2C communication protocol, realizing the digital display function of the spectrometer.

Claims

1. A design and manufacturing method of a digital display spectrometer, including a mechanical part, a power supply part and a measurement digital display part, characterized in that: The mechanical part includes a base, an adjustable connecting seat installed at the bottom end of the base, a fixing rod arranged at the side end of the base, a collimator frame installed at the upper end of the fixing rod, a collimator installed at the upper end of the collimator frame, a rotating shaft rotatably installed in the middle of the base, a flat head fixedly installed at the bottom end of the rotating shaft, a potentiometer disassembled and connected to the lower end of the flat head, a stage, a dial, a telescope connecting frame and a telescope rotating adjustment rod coaxially installed on the rotating shaft from top to bottom, a telescope fixedly installed at the upper end of the telescope connecting frame, and a light bulb arranged at the outer end of the telescope; The power supply part includes a DC regulated power supply and a Raspberry Pi power adapter, and the Raspberry Pi power adapter, the potentiometer and the light bulb are all electrically connected to the DC regulated power supply through wires; The digital display part includes a Raspberry Pi, an ADC analog-to-digital converter, a zeroing button and a display screen; the Raspberry Pi is electrically connected to a Raspberry Pi power adapter via a wire, the ADC analog-to-digital converter is electrically connected to a potentiometer via a wire, and the zeroing button and the display screen are both electrically connected to a DC regulated power supply via a wire.

2. The design and manufacturing method of a digital display spectrometer according to claim 1, characterized in that: The base is a claw-shaped triangular base, and the adjustable connecting base is installed on three legs of the claw-shaped triangular base; the adjustable connecting base includes a screw sleeve fixedly installed at the lower end of the base, an adjusting screw threadedly connected to the screw sleeve, and a placement seat installed at the bottom end of the adjusting screw.

3. The design and manufacturing method of a digital display spectrometer according to claim 1, characterized in that: The size of the lower end of the flat starter head is adapted to the potentiometer slot; a sensor is arranged at the lower end of the flat starter head, and the sensor is a precision conductive plastic potentiometer, and the internal structure is mainly a ring-shaped conductive plastic sheet; the working circuit is the same as that of the sliding rheostat, and when the spectrometer rotates, the sensor is driven to rotate synchronously, the contact of the sliding end changes, and the output potential also changes accordingly, so that the change in angle can be converted into a change in output potential.

4. The design and manufacturing method of a digital display spectrometer according to claim 1, characterized in that: The collimator bracket comprises a first mounting bracket fixedly mounted on the upper end of the fixed rod, a pitch adjustment screw and a horizontal adjustment screw arranged at both ends of the first mounting bracket, a first reinforcing rib connecting the mounting bracket and the fixed rod, and a mounting ring installed at the ends of the pitch adjustment screw and the horizontal adjustment screw; The collimator is installed inside the mounting ring of the first mounting frame.

5. The design and manufacturing method of a digital display spectrometer according to claim 1, characterized in that: The middle part of the fixed rod is sleeved with a vernier adjustment rod, and a locking screw and a fine-tuning screw are arranged on the outer side of the vernier adjustment rod; the end of the vernier adjustment rod is rotatably connected to the rotating shaft.

6. The design and manufacturing method of a digital display spectrometer according to claim 1, characterized in that: The telescope connecting frame includes an L-shaped connecting rod fixedly connected to the rotating shaft, and a second mounting frame arranged at the end of the L-shaped connecting rod; the structure of the second mounting frame is the same as that of the collimator frame, and the telescope is installed inside the mounting ring of the second mounting frame.

7. The design and manufacturing method of a digital display spectrometer according to claim 1, characterized in that: The telescope rotation adjustment rod includes a rotating ring rotatably installed on a rotating shaft, a fixing screw arranged at the side end of the rotating ring, a horizontal rod installed at the side end of the rotating ring, and a telescope rotation fine-tuning screw installed at the end of the horizontal rod. The telescope rotation fine-tuning screw is fixedly connected to the corner of the L-shaped connecting rod.

8. The design and manufacturing method of a digital display spectrometer according to claim 1, characterized in that: The potentiometer is a precision conductive plastic potentiometer with a resistance of 5K ohms, an independent linearity of ±0.1%, and a power of 2W; the working current of the precision conductive plastic potentiometer is 0.50mA to 1.00mA; The DC regulated power supply is 5V, and the voltage resolution is 10mV; The Raspberry Pi power adapter is 3.3V.

9. The design and manufacturing method of a digital display spectrometer according to claim 1, characterized in that: The communication protocol of the Raspberry Pi, ADC analog-to-digital converter, and display screen is the I2C protocol; The ADC analog-to-digital converter is ADS1115; The display screen is LCD1602.

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