Integrated digital droplet tracing device based on window type infrared sensor

Abstract

The utility model belongs to the field of detection instruments, and discloses an integrated digital liquid drop tracing device based on a window type infrared sensor, which comprises a shell, a sensor bracket, the window type infrared sensor and a PCB (printed circuit board) mainboard arranged in the shell, the window type infrared sensor is positioned outside the shell and is connected with the shell into a whole through a sensor bracket; the power supply end and the signal end of the window type infrared sensor are respectively connected with the PCB main board; a detection window is arranged in the middle of the window type infrared sensor, and a transmitting end and a receiving end which are coaxially and oppositely arranged are arranged on the two sides of the detection window respectively, so that an infrared light axis formed by the transmitting end and the receiving end along the axis completely covers the detection window, and liquid drops penetrating through the detection window are counted and detected. The device is based on the window type infrared sensor and is connected with the PCB main board, high-precision detection is achieved, meanwhile, liquid drop signals are collected and processed in an integrated mode, and therefore the scientificity and accuracy of liquid drop tracing are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to medical detection instruments, and more specifically, relates to an integrated digital droplet recording device based on a window-type infrared sensor. Background Art

[0002] Physiological droplets, a key indicator in medical functional experiments, can reflect the physiological state of experimental animals. By exploring the effects of changing conditions or drug interventions on the physiological state of animals, we can ultimately study the physiological properties or working principles of animal tissues or organs. In this process, precise and scientific biomedical testing instruments are indispensable. These instruments are essential for collecting, converting, analyzing, and outputting physiological signals. They can collect physiological signals such as dripping physiological droplets, perform digital analysis, and visualize them, ultimately helping experimenters obtain quantitative information on these physiological indicators.

[0003] Currently, physiological droplet detection in functional experiments is primarily accomplished through visual inspection and contact electrodes. Visual inspection is not only time-consuming and labor-intensive, but also lacks scientific accuracy. While contact electrodes can generate a signal by short-circuiting the droplet, the surface tension of the droplet often results in a persistent short circuit, limiting their operability. Furthermore, the electrodes corrode during contact, shortening their lifespan and potentially affecting the stability and reliability of experimental results.

[0004] In the early days, there were also signal acquisition devices that used U-groove photoelectric sensors. These devices mainly collected signals through infrared sensing. However, their main problem is that the single optical axis detection area is prone to forming a detection blind spot, that is, if the droplet does not pass through the optical axis detection range, it may be missed. In addition, these devices have a low frequency response and have difficulty capturing rapidly dripping droplets, resulting in low accuracy and large errors. They usually need to cooperate with a specific test system for signal processing, that is, they are connected to a specific functional experiment, so that the signal processing circuit using this system is equivalent to an extension of this specific test system. This dependence limits their applicability, making them only suitable for the same type or type of signal processing system. Therefore, these technologies have certain limitations in practical applications, and more advanced detection technologies are needed to improve the accuracy and efficiency of physiological droplet detection.

[0005] Therefore, existing methods for counting physiological droplets in functional experiments have certain problems, making it difficult to obtain accurate and scientific droplet counts, and they are also poorly operable and lack applicability. Utility Model Content

[0006] In response to the above-mentioned defects or improvement needs of the prior art, the utility model provides an integrated digital droplet recording device based on a window-type infrared sensor, wherein a detection window is provided in the middle of the window-type infrared sensor, and a coaxially oppositely arranged transmitting end and receiving end are provided on both sides of the detection window, so that the infrared light axis formed by the transmitting end and the receiving end along the axis can completely cover the detection window, and the droplets passing through the detection window can be counted and detected with high precision; at the same time, the PCB mainboard of the device and the window-type infrared sensor realize integrated processing of droplet signal acquisition and processing, thereby solving the technical problem of insufficient detection accuracy and scientificity of existing devices of this type.

[0007] To achieve the above-mentioned purpose, the present invention provides an integrated digital droplet recording device based on a window-type infrared sensor, comprising: a housing, a sensor bracket, a window-type infrared sensor, and a PCB mainboard built into the housing;

[0008] The window-type infrared sensor is located outside the housing and is integrally connected to the housing via the sensor bracket; the power supply terminal and signal terminal of the window-type infrared sensor are respectively connected to the PCB mainboard; a detection window is provided in the middle of the window-type infrared sensor, and a coaxially arranged transmitting end and receiving end are respectively provided on both sides of the detection window, so that the infrared light axis formed by the transmitting end and the receiving end along the axis can completely cover the detection window, and droplets passing through the detection window can be counted and detected.

[0009] Preferably, the transmitting end is encapsulated with at least nine infrared light-emitting diodes arranged in a linear direction, the receiving end is encapsulated with a corresponding number of infrared photosensitive diodes as the infrared light-emitting diodes, and each infrared light-emitting diode and the corresponding infrared photosensitive diode are located on the same axis.

[0010] Preferably, the detection window is a rectangular window type; the coverage area of ​​the detection window is 20 mm×20 mm.

[0011] Preferably, the device further comprises a catheter fixing device, which consists of a clip and a base plate, and the clip is fixed above the emission end through the base plate, and is used to unlock or fix the dripping port of the droplet catheter by opening and closing the clip, so that the droplets drip from above perpendicular to the detection window.

[0012] Preferably, the sensor bracket includes a vertical rod, a cross clamp, a horizontal rod, a sensor mounting seat and a bolt;

[0013] The window-type infrared sensor is fixed to one end of the cross bar through the sensor mounting base, the vertical bar is upright and fixed to the top of the shell, the other end of the cross bar and the vertical bar are vertically arranged through the cross clamp and fastened by the bolt.

[0014] Preferably, the PCB mainboard is further integrated with an NPN counting module, a main control circuit module, a key module and a digital tube driving module;

[0015] The input end of the NPN counting module is connected to the window-type infrared sensor, and the output end is connected to the main control circuit module, and is used to transmit the switching signal received from the window-type infrared sensor to the main control circuit module;

[0016] The main control circuit module adopts an STM32F103 single-chip microcomputer, the input end is connected to the NPN counting module, and the output end is connected to the digital tube driving module, so that the switching signal received from the NPN counting module is processed and transmitted to the digital tube driving module;

[0017] The digital tube driving module includes a time processing unit and a digital display screen, which is used to display the information received from the main control circuit module and the experimental time on the digital display screen.

[0018] Preferably, the digital display screen in the digital tube driving module is arranged in a digital display window on the front panel of the housing, including a liquid drop count display area and an experiment time display area.

[0019] Preferably, a key module is also integrated on the PCB main board;

[0020] The button module is connected to the main control circuit module and the digital tube driving module, and includes a pause button and a reset button externally arranged on the front panel of the housing, which are used to control the pause and reset of data recording respectively.

[0021] Preferably, a serial port conversion circuit module is also integrated on the PCB main board and is connected to a computer via a data transmission line.

[0022] Preferably, a main power switch of the device is also provided on the back panel of the housing and is connected to the PCB main board;

[0023] A main power line and a sensor output line extend from the back of the shell, which are used to connect the PCB mainboard to the main power supply and the window-type infrared sensor respectively.

[0024] In general, the above technical solutions conceived by the present invention have the following technical advantages compared with the existing technology:

[0025] (1) According to the integrated digital droplet recording device based on the window-type infrared sensor provided by the utility model, the window-type infrared sensor senses the dripping of droplets with high precision without blind spots, and is connected to the PCB main board to analyze and process the signal. The device provided by the utility model collects and processes the droplet signal in an integrated manner. The window-type infrared sensor is arranged in the middle of the detection window, and the transmitting end and the receiving end are arranged on both sides of the detection window. The infrared light axis formed by the transmitting end and the receiving end along the axis covers the detection area of ​​the detection window, which can achieve the advantages of full coverage of the collection range, high precision, high sensitivity, and no blind spot detection. At the same time, based on the connection between the window-type infrared sensor and the PCB main board, the droplet count and the experimental time are recorded synchronously, thereby improving the scientificity and accuracy of the droplet recording during the experiment.

[0026] (2) According to the integrated digital droplet recording device provided by the present invention, the window-type infrared sensor has a transmitting end and a receiving end. The transmitting end is encapsulated with at least nine infrared light-emitting diodes arranged in a linear direction, and the receiving end is encapsulated with infrared photosensitive diodes of a number corresponding to the infrared light-emitting diodes. Each infrared light-emitting diode and the corresponding infrared photosensitive diode are located on the same axis, so that there are several parallel infrared light axes in the detection window, and droplets can be collected. Even if the trajectory of the droplet is offset within the window range, the detection can be completed, which greatly improves the reliability and accuracy of the counting.

[0027] (3) According to the integrated digital droplet recording device provided by the present invention, the catheter fixing device on the window-type infrared sensor is used to fix the droplet outflow port of the catheter, so that the droplets pass through the window of the window-type infrared sensor during the dripping process, thereby realizing accurate detection of the droplets within the detection range of the window.

[0028] (4) According to the integrated digital droplet recording device provided by the present invention, a cross for fixing the horizontal bar and the vertical bar is used, and the window-type infrared sensor is adjusted to the left and right position and height based on the bolts on the cross clamp, so that the height of the window-type infrared sensor and the distance from the detection object can be adjusted according to the position of the test object before the experiment.

[0029] (5) The integrated digital droplet recording device provided by the present invention also integrates an NPN counting module, a main control circuit module, a key module and a digital tube drive module, so that the device has the functions of independent droplet counting, display, signal transmission and synchronous recording with the experimental time.

[0030] (6) The integrated digital droplet recording device provided by the present invention is also integrated with a serial port conversion circuit, which enables the transmission and storage of experimental data. It can adapt to different scenarios and different experiments, thereby improving the flexibility of the application of the device.

[0031] In summary, the device of the utility model is based on a window-type infrared sensor and is connected to a PCB mainboard to achieve full coverage and high-precision detection. At the same time, it integrates the collection and processing of droplet signals, thereby improving the scientificity and accuracy of droplet recording in the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of the integrated digital droplet recording device based on a window-type infrared sensor of the present invention.

[0033] Figure 2 This is a structural diagram of a window-type infrared sensor used as an example in the present utility model.

[0034] Throughout the drawings, like reference numerals are used to denote like structures, wherein:

[0035] 1-housing; 21-vertical rod; 22-cross clamp; 23-horizontal rod; 24-sensor mounting base; 25-bolt; 3-window-type infrared sensor; 31-detection window; 32-receiving end; 33-transmitting end; 34-sensor fixing part; 4-catheter fixing device; 41-clip; 42-base plate; 5-PCB main board; 51-digital display window; 511-drop count display area; 512-experimental time display area; 521-pause button; 522-reset button. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0037] According to the utility model, an integrated digital droplet recording device based on a window-type infrared sensor is provided. The device specifically includes a housing 1, a sensor bracket, a window-type infrared sensor 3, a catheter fixing device 4 and a PCB mainboard 5; the window-type infrared sensor 3 is arranged on the outside of the housing 1 and is connected to the housing 1 as a whole through the sensor bracket: the single-chip microcomputer in the PCB mainboard 5 is used as the core control unit, the window-type infrared sensor 3 senses the dripping of droplets, and the PCB mainboard 5 is connected to analyze and process the signals, thereby realizing the integrated operation of detection without blind spots, droplet recording detection and data sorting.

[0038] Furthermore, the PCB mainboard 5 integrates an NPN counter module, a main control circuit module, a key module, and a digital tube driver module. Data collected by the window-type infrared sensor 3 is collected by the NPN counter module, processed by the main control circuit module, and then transmitted to the driver module's digital display screen for intuitive display or further transmitted to a computer for data export and analysis. In addition to the number of droplets, the data obtained above also records the experimental time, which can be used to obtain the number of droplets within a certain period of time. The digital display also displays the experimental time, and the key module can pause, reset, and synchronously record the data.

[0039] Figure 1 The utility model shows a structural schematic diagram of an integrated digital droplet recording device based on a window-type infrared sensor, which includes a housing 1, a sensor bracket, a window-type infrared sensor 3, and a PCB mainboard 5; the window-type infrared sensor 3 is located outside the housing 1 and is connected to the housing 1 as a whole through the sensor bracket; the PCB mainboard 5 is located inside the housing 1; the power supply end and signal end of the window-type infrared sensor 3 are respectively connected to the PCB mainboard 5, and the detected physiological signal is converted into an electrical signal inside the sensor 3 and transmitted to the PCB mainboard 5 for processing through the signal output line.

[0040] The selected window-type infrared sensor 3 is a frame structure with a rectangular detection window. The central portion is sequentially enclosed by a receiving end 32, a sensor fixing portion 34, a transmitting end 33, and the sensor fixing portion 34, which together form a visible detection window boundary, namely, detection window 31. The window-type infrared sensor 3 forms an infrared optical axis on the axis of the detection window 31 by coaxially opposing and parallel corresponding transmitting ends 33 and 32, so that the transmitting ends 33 and the receiving ends 32 form an infrared optical axis on the axis within the detection window 31, thereby collecting droplets passing through the detection window 31. The sensor fixing side 34 is used to fix the position of the transmitting end and the receiving end to prevent mechanical vibration from causing changes in relative position and detection errors. Secondly, it can block other light interference on the detection plane to a certain extent. Finally, it forms a visible detection window 31 together with the transmitting end 33 and the receiving end 32.

[0041] Specifically, such as Figure 2As shown, one side of the detection window 31 is the transmitting end 33, and the opposite side is the receiving end 32, and the two are coaxially opposed and parallel. The transmitting end 33 is encapsulated with 9 2mm patch infrared light-emitting diodes arranged in a linear direction for emitting infrared light; the receiving end is encapsulated with patch infrared photosensitive diodes corresponding to the above-mentioned 9 infrared light-emitting diodes, that is, the corresponding light-receiving elements, for receiving the infrared light emitted by the transmitting end. Several pairs of infrared tubes (infrared light-emitting diodes and infrared photosensitive diodes) are located on the same axis, so that the several pairs of infrared rays emitted by the external light-emitting diodes are uniformly parallel. Several pairs of parallel infrared light axes can collect droplets, and even if the trajectory of the droplets is offset within the window range, the detection can be completed, thereby improving the reliability and accuracy of the counting.

[0042] The window-type infrared sensor 3 is an NPN normally open type, that is, when there is no obstruction, the transmitting end transmits an infrared light beam through the infrared light emitting diode, and the receiving end receives the infrared light signal. At this time, the circuit is in a disconnected state; when a droplet drips from the window detection range, it temporarily blocks the infrared light emitted by any one or more infrared light emitting diodes in the transmitting end, causing the amount of light received by the infrared photosensitive diode at the receiving end to change. At this time, the circuit is turned on and outputs a switch control signal (here it is a negative level) to the PCB mainboard. Therefore, the number of dripping droplets can be obtained by detecting the number of switch signals.

[0043] When using this device, the frequency response is set to be lower than the speed of the droplet passing through the sensor at high speed, for example, 50μs, so as to ensure detection accuracy; the infrared light it emits has high energy and is anti-interference, reducing signal loss.

[0044] Preferably, the number of patch infrared light-emitting diodes and patch infrared photosensitive diodes is 9. The detection window 31 is generally a rectangular window to ensure that the transmitting end and the receiving end are parallel to each other. The light emitted by the infrared light-emitting diode at the transmitting end is uniform and parallel, forming a corresponding number of parallel infrared light axes in the rectangular window, which basically covers the entire detection window 31.

[0045] The detection window covers an area of ​​20mm×20mm, which is smaller than the opening area of ​​the liquid storage container (a 50ml beaker is generally used in experimental teaching). The liquid storage container is placed under the sensor to receive droplets. Different liquid storage containers can be selected according to the amount of droplets, or the liquid storage container (50ml beaker, 100ml beaker) can be replaced during the experiment or waste liquid can be dumped.

[0046] Preferably, the catheter fixing device 4 on the window-type infrared sensor 3 is used to fix the catheter, and the dripping port of the droplet catheter is placed above the window-type infrared sensor 3, so that the droplets pass vertically through the detection window 31 of the window-type infrared sensor 3 during the dripping process, thereby performing accurate detection within the detection range of the detection window 31.

[0047] Preferably, the sensor bracket includes a horizontal bar 23, a vertical bar 21, a cross clamp 22, and a sensor mounting base 24. The window-type infrared sensor 3 is fixed to one end of the horizontal bar 23 via the sensor mounting base 24. The vertical bar 21 passes upright through the top of the shell 1 and is connected to the bottom of the shell via a support base. The horizontal bar 23 and the vertical bar 21 are vertically connected by the cross clamp 22 and are fastened and positioned by bolts 25 on the cross clamp 22, so that the window-type infrared sensor 3 and the shell 1 are connected as a whole through the sensor bracket. The horizontal bar 23 and the vertical bar 21 can be adjusted in left and right position and height position by the bolts 25 on the cross clamp 22. The height of the window-type infrared sensor 3 and the distance from the detection object can be adjusted according to the position of the test object before the experiment.

[0048] Preferably, a PCB 5 is disposed within the housing 1 and connected to the power and signal terminals of the window-type infrared sensor 3, providing conduction and transmission. The PCB 5 also integrates an NPN counter module, a main control circuit module, a key module, and a digital tube driver circuit module, located on the front and back of the PCB, respectively, for data transmission, processing, analysis, and display.

[0049] The specific NPN counting module is connected to the PCB main control circuit module to transmit electrical signals. The main control circuit module of the PCB main board 5 uses an STM32F103 single-chip microcomputer to receive the electrical signals transmitted by the sensor, analyze and process the received electrical signals, and then pass the data to the digital tube drive circuit for display in the digital tube display window 51. The digital tube drive circuit not only processes the droplet count experimental data, but also synchronizes the experimental time and displays it in the digital tube display window 51. At the same time, it can be further transmitted to a computer via a serial port conversion circuit for data export and analysis. The pause 521 and reset 522 modules pause or clear the data displayed in the digital display window 51 by pressing a button, respectively used to pause the experiment to record experimental data and clear the experimental data for the next experiment. The 220-5V power supply module converts the 220V power supply into the operating voltage required by the various electronic components of this device.

[0050] The six-digit digital display on the PCB 5 is fixed to a digital display window 51 on the front of the housing. There are two rows of these displays: the upper row, a drop count display area 511, displays the number of droplets counted, and the lower row, an experiment time display area 512, displays the experiment time. A pause button 521 and a reset button 522 are located on the front of the housing to respectively pause and reset data recording. The power switch is located on the back of the housing 1 and is connected to the PCB 5.

[0051] Preferably, a power line and a sensor output line extend from the back of the housing 1 to connect the PCB mainboard 5 to the 220V power supply and the window-type infrared sensor 3 respectively.

[0052] Preferably, a serial port conversion circuit module is integrated on the PCB mainboard 5. One end of the data transmission line is connected to this module and the other end is connected to the computer USB port, so that experimental data can be displayed and exported on the computer interface. The setting of this wired transmission module enables the transmission and storage of experimental data, which can be adapted to different scenarios and different experiments, thereby increasing the flexibility of the application of the device.

[0053] When conducting functional experiments, such as "Factors Affecting Cardiac Output in Frogs" and "Factors Affecting Urine Production," it is necessary to count physiological indicator droplets and record the experimental time. In this case, the integrated digital droplet recording device based on the window-type infrared sensor can be used. Specifically, the catheter is inserted into the catheter fixing device 4 on the window-type infrared sensor 3 so that the catheter head is placed above the sensor window 31. Containers of different volumes are placed below the window-type infrared sensor 3 to store liquid according to experimental requirements. The height and position of the sensor 3 can be directly adjusted through the sensor bracket. Connect the power supply, turn on the switch, start the device, and immediately begin experimental recording. When a droplet drips through the window 31, the droplet blocks the infrared light emitted by the transmitting end, causing the light intensity received by the receiving end to change. At this time, the sensor 3 generates a switch signal and transmits it to the PCB mainboard 5. After processing and analysis by the relevant circuits on the PCB mainboard 5, it is transmitted to the digital display window 51 to display the number of droplets, or further transmitted to the computer to export and analyze the relevant experimental data. In addition to the experimental data on the droplet count, the experimental time is continuously recorded by the relevant circuits of the PCB mainboard 5 and displayed on the digital display screen 512 in the lower row of the digital display window. The "Pause" button 521 pauses the counting and timing, and the experimenter records the data by referring to the digital display screen 512 to obtain the number of droplets dropped during the period. The "Reset" button 522 resets the experimental data and allows the experimenter to proceed to the next experiment. As long as a droplet falls within the detection window, the several parallel infrared light axes within the window can capture the droplet. Even if the droplet's trajectory deviates within the window range, detection can still be completed, greatly improving the reliability and accuracy of the count. Furthermore, multiple experiments have demonstrated that the window-type infrared sensor 3 has high sensitivity, high precision, and no blind spots, enabling accurate counting, ensuring the scientific and accurate counting. The device is compact and simple to operate, and can independently complete the collection, analysis, and display of experimental data, greatly facilitating experimental operation and use, and improving the quality and efficiency of experiments.

[0054] The integrated digital droplet recording device based on a window-type infrared sensor according to the utility model has the advantages of high precision, high sensitivity, and no blind spot detection. It also has independent droplet counting, display, signal transmission, and recording devices synchronized with the experimental time. It is highly practical and can be used to record the number of droplets within a certain period of time in different scenarios and experiments. This device is used in functional experiments. The droplet signal acquisition is sensitive and accurate, the data display is intuitive and can be transmitted to a computer for export and analysis, and the experimental time is recorded synchronously. The instrument is compact, simple to operate, and easy to use. Therefore, this recording device is suitable for the scientific and accurate recording of physiological droplets in functional experimental teaching, improving the quality and efficiency of experimental teaching.

[0055] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these changes and variations. The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and their scope of protection is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention, and the scope of protection of the present invention shall be subject to the claims.

Claims

1. An integrated digital droplet recording device based on a window-type infrared sensor, characterized in that: include: A housing (1), a sensor bracket, a window-type infrared sensor (3), and a PCB mainboard (5) built into the housing (1); The window-type infrared sensor (3) is located outside the housing (1) and is connected to the housing (1) as a whole via the sensor bracket; the power supply terminal and the signal terminal of the window-type infrared sensor (3) are respectively connected to the PCB mainboard (5); a detection window (31) is provided in the middle of the window-type infrared sensor (3), and a coaxially oppositely arranged transmitting terminal (33) and a receiving terminal (32) are respectively provided on both sides of the detection window (31), so that the infrared light axis formed along the axis of the transmitting terminal (33) and the receiving terminal (32) can completely cover the detection window (31), and the droplets passing through the detection window (31) are counted and detected.

2. The integrated digital droplet recording device based on a window-type infrared sensor according to claim 1 is characterized in that: The transmitting end (33) is encapsulated with at least nine infrared light emitting diodes arranged in a linear direction, and the receiving end (32) is encapsulated with a number of infrared photosensitive diodes corresponding to the number of the infrared light emitting diodes, and each infrared light emitting diode and the corresponding infrared photosensitive diode are located on the same axis.

3. The integrated digital droplet recording device based on a window-type infrared sensor according to claim 1 is characterized in that: The detection window (31) is a rectangular window type; the coverage area of ​​the detection window (31) is 20 mm×20 mm.

4. The integrated digital droplet recording device based on a window-type infrared sensor according to claim 1 is characterized in that: The device further comprises a catheter fixing device (4), which is composed of a buckle (41) and a bottom plate (42). The buckle (41) is fixed above the emission end (33) via the bottom plate (42), and is used to unlock or fix the dripping port of the droplet catheter by opening and closing the buckle (41), so that the droplets drip from above perpendicular to the detection window (31).

5. The integrated digital droplet recording device based on a window-type infrared sensor according to claim 1 is characterized in that: The sensor bracket comprises a vertical rod (21), a cross clamp (22), a cross rod (23), a sensor mounting seat (24) and a bolt (25); The window-type infrared sensor (3) is fixed to one end of the cross bar (23) via the sensor mounting seat (24), the vertical bar (21) is uprightly fixed to the top of the housing (1), and the other end of the cross bar (23) and the vertical bar (21) are vertically arranged via the cross clamp (22) and fastened via the bolt (25).

6. The integrated digital droplet recording device based on a window-type infrared sensor according to claim 1 is characterized in that: The PCB mainboard (5) is also integrated with an NPN counting module, a main control circuit module, a key module and a digital tube driving module; The input end of the NPN counting module is connected to the window-type infrared sensor (3), and the output end is connected to the main control circuit module, and is used to transmit the switching signal received from the window-type infrared sensor to the main control circuit module; The main control circuit module adopts an STM32F103 single-chip microcomputer, the input end is connected to the NPN counting module, and the output end is connected to the digital tube driving module, so that the switching signal received from the NPN counting module is processed and transmitted to the digital tube driving module; The digital tube driving module includes a time processing unit and a digital display screen, which is used to display the information received from the main control circuit module and the experimental time on the digital display screen.

7. The integrated digital droplet recording device based on a window-type infrared sensor according to claim 6, characterized in that: The digital display screen in the digital tube driving module is arranged in a digital display window on the front panel of the housing (1), and includes a liquid drop count display area (511) and an experiment time display area (512).

8. The integrated digital droplet recording device based on a window-type infrared sensor according to claim 6, characterized in that: The PCB main board (5) is also integrated with a key module; The key module is connected to the main control circuit module and the digital tube drive module, and includes a pause key (521) and a reset key (522) externally arranged on the front panel of the housing (1), which are used to control the pause and reset of data recording respectively.

9. The integrated digital droplet recording device based on a window-type infrared sensor according to claim 1, characterized in that: The PCB mainboard (5) is also integrated with a serial port conversion circuit module, which is connected to a computer via a data transmission line.

10. The integrated digital droplet recording device based on a window-type infrared sensor according to claim 1, characterized in that: The back panel of the housing (1) is also provided with a main power switch of the device, which is connected to the PCB main board (5); A power line and a sensor output line extend from the back of the housing (1), and are used to connect the PCB mainboard (5) to the power supply and the window-type infrared sensor (3), respectively.

Images