Transmission type experimental device with temperature adjusting function

Abstract

This invention provides a transmission-type experimental device with temperature control function, including a chamber, a rotating module, a water bath temperature control module, an optical fiber connection module, a display and interaction module, a control and processing module, and a power input module; it can simultaneously place multiple samples and control the temperature of multiple samples at the same time. Compared with other cuvette experimental devices, this device is more efficient and can also ensure that all samples are heated and cooled in the same environment.

Description

Technical Field

[0001] This utility model relates to the technical field of pH value measurement experimental auxiliary devices, and in particular to a transmission experimental device with temperature adjustment function. Background Technology

[0002] pH value is one of the key indicators for assessing the acidity or alkalinity of water. The pH value of a water body not only affects the solubility of nutrients but also influences the formation and transformation of harmful substances such as ammonia nitrogen, nitrite, and sulfides. Excessively high or low pH values ​​can disrupt the chemical balance of the water body, thereby affecting aquatic biodiversity and ecosystem stability. Visible / near-infrared spectroscopy is a method for detecting water pH values ​​that requires no water body destruction, allows for rapid, real-time online detection, and can promptly reflect changes in water pH. By acquiring real-time spectral data of water pH and transmitting it to an established multivariate calibration model, the current pH value of the water can be obtained.

[0003] However, in actual data collection, water temperature is not constant due to geographical location and climate conditions; it varies at different times. Spectral data collection is easily affected by environmental interference, with temperature being a major factor. Temperature changes alter the intensity and position of the absorption bands of the OH groups in water molecules, thus changing the spectral intensity and peak position, affecting the accuracy of the prediction model. Therefore, in real-world testing, commercially viable products are often difficult to develop due to insufficient accuracy. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a transmission experimental device with temperature control function for collecting the visible / near-infrared spectra of a group of samples at different temperatures.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a transmission-type experimental device with temperature control function, comprising a housing, a rotating module, a water bath temperature control module, an optical fiber connection module, a display and interaction module, a control and processing module, and a power supply access module;

[0006] The box includes a support body and a support plate. Multiple support bodies are fixed symmetrically around the center of the bottom of the box. The other end of the support body is connected to the support plate. The support plate is disc-shaped and has a circular channel in the middle. The rotating module is disposed through the circular channel.

[0007] The rotating module includes a motor mount, a stepper motor, a connector, and a cuvette sample holder. The motor mount is installed at the bottom of the housing, the stepper motor is fixedly mounted on the motor mount, the connector is mounted on the output shaft of the stepper motor, and the connector is also connected to the cuvette sample holder. The cuvette sample holder is used to place samples and has a hollowed-out center.

[0008] The water bath temperature control module includes a water tank, a semiconductor cooling chip, a PTC heating chip, and a temperature sensor. The water tank is placed on a support plate and contains liquid. The PTC heating chip is installed in the water tank to heat the liquid in the water tank, the semiconductor cooling chip is installed in the water tank to cool the liquid in the water tank, and the temperature sensor is installed in the water tank to collect the temperature of the liquid in the water tank.

[0009] The fiber optic connection module includes a fiber optic connector, an incident fiber optic fixture, an outgoing fiber optic fixture, an SMA905 fiber optic fastener, and a slide rail. The fiber optic connector is mounted on a support plate to connect the external incident fiber optic cable and the external outgoing fiber optic cable. The incident fiber optic fixture is mounted on the slide rail and moves relative to the rail to adjust the appropriate optical path length. The outgoing fiber optic fixture is mounted on the inner end of the fiber optic connector. There are two SMA905 fiber optic fasteners, one mounted on the incident fiber optic fixture and the other on the outgoing fiber optic fixture. The external incident fiber optic cable transmits incident light to the sample through connection with the SMA905 fiber optic fastener on the incident fiber optic fixture, and the external outgoing fiber optic cable receives outgoing light transmitted from the sample through connection with the SMA905 fiber optic fastener on the outgoing fiber optic fixture.

[0010] The interactive display module includes a display screen, a run button, and a rotate button.

[0011] The control processing module includes a control chip, which is electrically connected to the stepper motor, the semiconductor cooling chip, the PTC heating chip, the temperature sensor, the display screen, the operation button, and the rotary button.

[0012] In a preferred embodiment, the cuvette sample holder is provided with multiple slots for placing samples; the control chip sends control signals to the stepper motor, the stepper motor rotates to drive the connector to rotate, and the connector drives the cuvette sample holder to rotate.

[0013] In a preferred embodiment, 36 slots are provided, arranged symmetrically along the center.

[0014] In a preferred embodiment, the temperature sensor is a DS18B20 temperature sensor, which uses a single-bus protocol. Bus communication is achieved through a single control signal line. The temperature sensor collects the temperature of the liquid in the water tank and sends the temperature signal to the control chip.

[0015] In a preferred embodiment, the control chip is an STM32 chip.

[0016] In a preferred embodiment, the control chip sends a heating signal to the PTC heating element, which heats the liquid in the water tank.

[0017] In a preferred embodiment, the control chip sends a cooling signal to a thermoelectric cooler, which cools the liquid in the water tank.

[0018] In a preferred embodiment, the support plate is fixed to the support body by screws.

[0019] In a preferred embodiment, four screw holes are provided directly below the circular channel for fixing the motor mounting bracket of the rotating module.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Water bath heating is used to ensure uniform heating of the sample, avoiding the impact of uneven heating on the spectrum caused by inconsistent temperatures in different parts of the sample.

[0022] 2. It can hold 36 samples at the same time and control the temperature of all 36 samples simultaneously. Compared with other cuvette experimental devices, this device is more efficient and can also ensure that all samples are heated and cooled in the same environment.

[0023] 3. This device is easy to operate; samples do not need to be removed when changing them. After placing 36 samples into the device, temperature-controlled sampling can be performed. Changing samples is as simple as clicking the rotation button. This also ensures that the samples are minimally affected by external temperatures. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the device structure according to a preferred embodiment of the present invention;

[0025] Figure 2 This is a half-sectional view of the device structure according to a preferred embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the rotating module according to a preferred embodiment of the present invention;

[0027] Figure 4 This is a half-sectional view of the fiber optic connection module according to a preferred embodiment of the present invention;

[0028] Reference numerals: 10 Box body, 11 Support body, 12 Support plate, 20 Rotation module, 21 Motor mounting base, 22 Stepper motor, 23 Connector, 24 Cuvette sample holder, 30 Water bath temperature control module, 31 Water tank, 32 Semiconductor cooling chip, 33 PTC heating element, 34 Temperature sensor, 35 Temperature control module, 40 Fiber optic connection module, 41 Fiber optic connection stage, 42 Incident fiber optic fixing body, 43 Outgoing fiber optic fixing body, 44 SMA905 fiber optic fixing component, 45 Slide rail, 50 Display and interaction module, 51 Run button, 52 Rotation button, 53 Display screen, 60 Power input module, 70 Sample, 80 Control and processing module. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application; as used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise; furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] A transmission experimental device with temperature control function, reference Figure 1-4 ,like Figure 2 As shown, the housing 10 is provided with a support body 11 and a support plate 12. There are 6 support bodies 11, which are fixed to the bottom surface inside the housing 10 to fix the support plate 12. The support plate 12 is placed on the support body 11 by screws. The support plate 11 is disc-shaped with a circular channel in the middle, through which the rotating module 20 passes.

[0033] like Figure 2 As shown, the rotating module 20 is mounted on the support plate 12 and extends through a circular channel in the support plate 12 for switching between different samples. The rotating module 20 includes a motor mount 21, a stepper motor 22, a connector 23, and a cuvette sample holder 24. The motor mount 21 is installed on a housing directly below the circular channel of the support plate 11 to house the stepper motor 22. Figure 3As shown, the stepper motor 22 is mounted on the motor mounting base 21 to provide circumferential rotation, the connector 23 is fixed on the output shaft of the stepper motor 22, and the bottom end of the cuvette sample holder 24 cooperates with the connector 23 to obtain circumferential rotation to drive the sample 70 to rotate. The cuvette sample holder 24 has 36 slots and can hold 36 samples.

[0034] like Figure 2 As shown, the water bath temperature control module 30 is mounted on the support 11 to control the temperature of the sample 70. The water bath temperature control module 30 includes a water tank 31, a thermoelectric cooler 32, a PTC heating element 33, a temperature sensor 34, and a temperature control module 35. The thermoelectric cooler 32 is mounted on the water tank 31 to cool the water in the tank. The PTC heating element 33 is mounted on the water tank 31 to heat the water in the tank. The temperature sensor 34 is mounted on the water tank 31 to collect the water temperature. The temperature control module 35 is mounted on the housing 10 and connected to the thermoelectric cooler 32, the PTC heating element 33, and the temperature sensor 34 to control the thermoelectric cooler 32, the PTC heating element 33, and the temperature sensor 34 to control the water temperature.

[0035] like Figure 1 As shown, the fiber optic connection module 40 is mounted on the support plate 12 to connect the external incident fiber optic cable and the outgoing fiber optic cable. Figure 4 As shown, the fiber optic connection module 40 includes a fiber optic connection platform 41, an incident fiber optic fixing body 42, an outgoing fiber optic fixing body 43, an SMA905 fiber optic fixing piece 44, and a slide rail 45. The incident fiber optic fixing body 42 is mounted on the slide rail 45 and can be moved slightly relative to the slide rail to adjust the appropriate optical path length. The outgoing fiber optic fixing body 43 is mounted on the inner end of the fiber optic connection platform 41. There are two SMA905 fiber optic fixing pieces 44, one mounted on the incident fiber optic fixing body 42 and the other mounted on the outgoing fiber optic fixing body 43. The external incident fiber optic cable transmits incident light to the sample 70 through connection with the SMA905 fiber optic fixing piece 44 on the incident fiber optic fixing body 42, and the external outgoing fiber optic cable receives outgoing light transmitted from the sample 70 through connection with the SMA905 fiber optic fixing piece 44 on the outgoing fiber optic fixing body 43.

[0036] like Figure 1 As shown, the control processing module 80 is installed on the side wall inside the enclosure and is used to control the operation of the entire device. The power supply module 60 is installed on the outer wall of the enclosure and is used to provide power to the device.

[0037] The display interaction module 50 includes a display screen 53, a run button 51, and a rotary button 52. The display screen 53, run button 51, and rotary button 52 are all mounted on the outer shell of the housing 10. The display screen 53 displays the actual temperature of the liquid in the water bath, the set temperature, and the temperature control time. The set temperature and temperature control time are adjusted using the set button. Clicking the run button starts the water bath temperature control module, changing the liquid temperature by heating or cooling. Once the set temperature is reached, the liquid temperature is fine-tuned to stabilize. The duration of this process is the temperature control time. After temperature control ends, the water bath temperature control module stops working, waiting for the next button operation. There is also a rotary button; clicking it rotates the motor in the rotary module, thus switching samples.

[0038] The control processing module includes a control chip, which is electrically connected to the stepper motor, the semiconductor cooling chip, the PTC heating chip, the temperature sensor, the display screen, the operation button, and the rotary button.

[0039] The electrical connection between the control chip and the stepper motor, the semiconductor cooling chip, the PTC heating element, the temperature sensor, the display screen, the operation button, and the rotary button is a common technique used by those skilled in the art, and will not be elaborated here as it is common knowledge.

[0040] The specific experimental steps for conducting the transmission temperature experiment using the above-mentioned device are as follows:

[0041] Step (1) Connect the external incident fiber and the outgoing fiber to the device, and fine-tune the optical path length by moving the incident fiber fixing body.

[0042] Step (2) Place the 36 samples into the cuvette sample holder in the rotating module in sequence, and then add liquid to the water tank for cooling and heating the samples. Note that the liquid should not be too much and should not exceed 1 / 2 of the sample height.

[0043] Step (3) Click the power button to initialize the system. The actual temperature of the liquid in the tank will be displayed on the screen.

[0044] Step (4) Set the set temperature and temperature control time through the display interaction module. The control module will display the set temperature and temperature control time on the display screen according to the input of the button.

[0045] Step (5): Click the Run button. The control chip drives the cooling or heating element to control the temperature of the liquid in the water tank. If the set temperature is lower than the actual temperature of the liquid in the water tank, the control chip drives the semiconductor cooling element to cool. If the set temperature is higher than the actual temperature of the liquid in the water tank, the control chip drives the PTC heating element to heat. When the temperature of the liquid in the water tank is close to the set temperature, the control chip drives the semiconductor cooling element and the PTC heating element to switch continuously until the temperature stabilizes. The entire process of continuous temperature control ends when the Run button is pressed.

[0046] Step (6) During the temperature control time in step (5), all sample spectral data acquisition must be completed. Sampling generally begins ten minutes before the end of the temperature control time. The external spectrometer is connected to a computer with host computer software, allowing sampling to be performed on the host computer. The device's interactive display module has a rotation button. After completing the data acquisition for one sample's spectrum, click the rotation button. The cuvette sample holder, with the assistance of a motor, will rotate 10° with the next sample, positioning it in the center of the optical path. Then click the sampling button to complete the sampling of the second sample. Repeating this process continuously will complete the acquisition of the spectra of all samples within the cuvette sample holder.

[0047] After the data acquisition in step (7) is completed, repeat steps (4) to (6) to complete the spectral data acquisition of all samples at the next temperature.

Claims

1. A transmission-type experimental device with temperature regulation function, characterized in that, It includes a housing, a rotating module, a water bath temperature control module, a fiber optic connection module, a display and interaction module, a control and processing module, and a power input module; The box includes a support body and a support plate. Multiple support bodies are fixed symmetrically around the center of the bottom of the box. The other end of the support body is connected to the support plate. The support plate is disc-shaped and has a circular channel in the middle. The rotating module is disposed through the circular channel. The rotating module includes a motor mount, a stepper motor, a connector, and a cuvette sample holder. The motor mount is installed at the bottom of the housing, the stepper motor is fixedly mounted on the motor mount, the connector is mounted on the output shaft of the stepper motor, and the connector is also connected to the cuvette sample holder. The cuvette sample holder is used to place samples and has a hollowed-out center. The water bath temperature control module includes a water tank, a semiconductor cooling chip, a PTC heating chip, and a temperature sensor. The water tank is placed on a support plate and contains liquid. The PTC heating chip is installed in the water tank to heat the liquid in the water tank, the semiconductor cooling chip is installed in the water tank to cool the liquid in the water tank, and the temperature sensor is installed in the water tank to collect the temperature of the liquid in the water tank. The fiber optic connection module includes a fiber optic connector, an incident fiber optic fixture, an outgoing fiber optic fixture, an SMA905 fiber optic fastener, and a slide rail. The fiber optic connector is mounted on a support plate to connect external incident and outgoing fibers. The incident fiber optic fixture is mounted on the slide rail and moves relative to the slide rail to adjust the appropriate optical path length. The outgoing fiber optic fixture is mounted on the inner end of the fiber optic connector. There are two SMA905 fiber optic fasteners, one mounted on the incident fiber optic fixture and the other mounted on the outgoing fiber optic fixture. An external incident fiber transmits incident light to the sample by connecting to an SMA905 fiber optic fixture on the incident fiber fixture, and an external exiting fiber receives exiting light transmitted from the sample by connecting to an SMA905 fiber optic fixture on the exiting fiber fixture. The interactive display module includes a display screen, a run button, and a rotate button. The control processing module includes a control chip, which is electrically connected to the stepper motor, the semiconductor cooling chip, the PTC heating chip, the temperature sensor, the display screen, the operation button, and the rotary button.

2. The transmission type experiment device having a temperature adjustment function according to claim 1, wherein, The cuvette sample holder has multiple slots for placing samples; the control chip sends control signals to the stepper motor, the stepper motor rotates and drives the connector to rotate, and the connector drives the cuvette sample holder to rotate.

3. The transmission type experiment device having a temperature adjustment function according to claim 2, wherein, There are 36 slots, arranged symmetrically along the center.

4. The transmission-type experimental apparatus having a temperature adjustment function according to claim 1, characterized in that, The temperature sensor uses a DS18B20 temperature sensor and a single-bus protocol. Bus communication is achieved through a single control signal line. The temperature sensor collects the temperature of the liquid in the water tank and sends the temperature signal to the control chip.

5. The transmission-type experimental apparatus having a temperature adjustment function according to claim 1, wherein The control chip used is an STM32 chip.

6. The transmission-type experimental apparatus having a temperature adjustment function according to claim 1, wherein The control chip sends a heating signal to the PTC heating element, which heats the liquid in the water tank.

7. The transmission-type experimental apparatus having a temperature adjustment function according to claim 1, wherein The control chip sends a cooling signal to the semiconductor cooling chip, which cools the liquid in the water tank.

8. A transmission-type experimental device with temperature regulation function according to claim 1, characterized in that, The support plate is fixed to the support body with screws.

9. The transmission-type experiment device having a temperature adjustment function according to claim 1, wherein, Four screw holes are located directly below the circular channel for fixing the motor mounting bracket of the rotating module.

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