Dynamically adjustable animal surgery experiment operation table

Abstract

The invention discloses a dynamically adjustable animal surgery experiment operation table, belongs to the technical field of animal experiment instruments, and aims at solving the problems that the position adjusting range of a fixing shaft of an existing operation table is limited, and tension control of a traction line depends on artificial experience. According to the technical scheme, fixing shaft sliding grooves are formed in the left side and the right side of a platen, and sliding holes are formed in the bottoms of the grooves for fixing shafts to slide; a translation fixing button is arranged at the bottom of the fixing shaft and is locked and fixed after sliding in place; the top of the fixed shaft is coaxially provided with a traction line length adjusting shaft, and the traction line length adjusting shaft is driven by a take-up button to rotate so as to take up and pay off the wound traction line; the tail end of the traction line binds and locks an animal body through a line locking device and a guide wheel; the side wall of the fixed shaft is provided with a height adjusting button to drive the fixed shaft to stretch. The operating platform realizes multi-dimensional accurate adjustment of animal body positions and stable control of traction tension, and is mainly used for safely and efficiently fixing the body positions of experimental animals in animal surgery experiments.

Description

Technical Field

[0001] The invention belongs to the technical field of animal experimental instruments, and in particular relates to a dynamically adjustable animal surgical experimental operating table. Background Art

[0002] In the field of animal surgical experiments, the performance of the operating table directly affects the reliability of experimental data and the safety of experimental animals. In the existing technology, there are still several technical bottlenecks in the structural design and functional integration of operating tables for animal surgical experiments. First, the position adjustment mechanism of the fixed axis generally adopts fixed hole positions, and its adjustment range is limited to the preset hole spacing, which is difficult to meet the differentiated experimental needs of animals of different sizes (such as mice and rats). For example, when the experiment requires the simultaneous fixation of multiple anatomical parts, the spacing adjustment of the fixed axis often needs to be achieved through repeated disassembly and reassembly, which is not only inefficient but also has low positioning accuracy. The root cause of such problems is that the traditional adjustment mechanism lacks multi-dimensional flexible adaptability, and it is difficult to balance the durability and precision of the mechanical structure.

[0003] Secondly, the control of the traction line tension mostly relies on manual adjustment, and the operator needs to judge the traction state through visual inspection or experience, which has significant subjective errors. Especially in long-term experiments, the tension attenuation of the traction line caused by material creep or changes in ambient temperature and humidity is difficult to be perceived in real time, which may cause damage to the experimental animal tissue due to sudden tension changes. In addition, the existing traction system generally lacks a tension feedback mechanism and cannot automatically intervene when the traction is overloaded. It only passively limits the displacement through a mechanical locking device. This method has a delayed response when dealing with dynamic loads such as sudden struggles of animals, posing a safety hazard. The fundamental reason is that the traditional solution has not integrated sensor technology and closed-loop control logic into the traction system, resulting in an over-reliance on manual experience during the operation process.

[0004] For biological signal monitoring, existing operating tables often face the challenge of environmental interference with sensor signals. For example, the thermal noise generated when the heating module is working will be transmitted to the piezoelectric sensor through the table, causing low-frequency interference components to be mixed into the respiratory vibration signal. Traditional solutions mostly use a single shielding layer or fixed-band filtering, but the thermal noise spectrum changes dynamically with the heating power, and fixed filtering is difficult to effectively distinguish between valid signals and noise, resulting in signal distortion. In addition, uneven contact pressure between the sensor and the animal's body surface may cause baseline drift, and the existing system lacks adaptive calibration capabilities and requires frequent manual adjustments, affecting the continuity of the experiment. The complexity of these problems stems from the low amplitude and wide frequency domain characteristics of the biological signal itself, and it is necessary to solve the dual problems of hardware anti-interference and algorithm dynamic adaptation at the same time.

[0005] Finally, the existing operating consoles lack functional scalability. For example, the interfaces for external devices (such as anesthesia masks and electrophysiological instruments) are poorly standardized, and compatibility between devices from different manufacturers is poor, resulting in extended experimental preparation time. In addition, when multiple modules work together, there is a lack of a unified control platform to integrate and manage subsystems such as heating, traction, and monitoring. Operators need to switch between multiple independent interfaces, increasing the risk of misoperation. The cause of these limitations can be traced back to the fact that traditional designs focus more on optimizing single functions while neglecting system-level integration and standardized interface design, making it difficult to meet the collaborative control needs of complex experimental scenarios.

[0006] In summary, existing animal surgical experimental consoles have significant technical deficiencies in structural adjustability, tension control accuracy, anti-interference capabilities, and system integration. Addressing these issues requires breakthroughs in multiple technical areas, including mechanical design, sensor fusion, and intelligent control. In particular, achieving a balance between high-precision adjustment and low-noise signal acquisition within a limited space requires extremely high demands on material selection, circuit layout, and algorithm design. Summary of the Invention

[0007] One objective of this invention is to address the limitations of existing animal surgical experimental platforms, such as the limited adjustment range of the fixed axis and the reliance on manual experience to control the tension of the puller wire. Traditional solutions, which rely on fixed holes to adjust the fixed axis, are difficult to adapt to the needs of animals of varying sizes, and manual tension adjustment can easily cause tissue damage in experimental animals.

[0008] Solve the problem of low standardization of external device interfaces, which leads to poor compatibility of devices such as anesthesia masks and power boards, and low efficiency of experimental preparation.

[0009] The problem that the pulling height adjustment and wire length fixing functions of existing equipment rely on manual experience, are insufficient in precision and easily introduce mechanical errors, affecting experimental repeatability and safety.

[0010] This solution solves the problem that traditional traction systems cannot automatically adapt tension parameters according to animal types and lack instantaneous overload protection mechanisms, posing safety risks.

[0011] Solve the problem that sensors in biological signal monitoring are susceptible to environmental interference (such as thermal noise), which leads to distortion of respiratory rate and body temperature data.

[0012] Solve the problem that the temperature control accuracy of the heating module is insufficient, it is difficult to maintain the stable body temperature of experimental animals, and there is significant heat conduction interference between the heating area and the sensing area.

[0013] Solve the problem that the piezoelectric sensor signal conditioning circuit has weak anti-interference ability and poor low-frequency noise suppression effect, which affects the reliability of respiratory monitoring.

[0014] Solve the problems of unoptimized tension sensor signal processing link, low integration of analog-to-digital conversion and filtering modules, and obvious real-time feedback delay.

[0015] The solution to thermal noise elimination relies on fixed filtering, which cannot dynamically adapt to changes in heating power, and the signal baseline drift problem is prominent.

[0016] Solve the problems of incomplete cancellation of environmental noise when multiple sensors work together and insufficient accuracy in identifying species-specific respiratory frequency bands.

[0017] In order to achieve these purposes and other advantages according to the present invention, the present invention provides a dynamically adjustable animal surgical experimental operating table, comprising: The table plate has a fixed shaft sliding groove on each of the left and right sides of its upper surface, and a sliding hole extending along its length direction is provided on the bottom wall of the fixed shaft sliding groove. Two fixed shafts are slidably arranged in each fixed shaft sliding groove, and the bottom of the fixed shaft passes through the sliding hole. A forward and backward translation fixing button is provided on the fixed shaft located below the table plate. When the fixed shaft slides to the desired position, it is locked and fixed with the fixed shaft sliding groove through the forward and backward translation fixing button; The pulling wire length adjustment shaft is coaxially arranged on the top of the fixed shaft and driven to rotate by the pulling wire take-up button. The pulling wire is wound on the pulling wire length adjustment shaft. One end of the pulling wire is connected to the pulling wire length adjustment shaft, and the other end passes through the pulling wire length adjustment shaft, passes through the pulling wire locker and the guide wheel in sequence, and is used to tie the animal body and is locked and fixed by the pulling wire locker. The pulling wire locker is installed at the cable outlet end of the pulling wire length adjustment shaft. The pulling height adjustment button is installed on the side wall of the fixed shaft through threaded engagement, and is used to drive the fixed shaft to extend and lower.

[0018] Preferably, the dynamically adjustable animal surgical experimental operating table of the present invention further comprises: A front expandable area, located at the front edge of the table, configured to receive an external gas anesthesia mask; a right expandable area, which is located on the right edge of the table and is configured as an external power supply board; The front expandable area and the right expandable area are respectively equipped with standard interfaces, including power interface and device card slot.

[0019] Preferably, in the dynamically adjustable animal surgical experimental operating table of the present invention, the traction height adjustment knob is a tube sleeved on the outer circumference of the fixed shaft and connected to the fixed shaft through a differential thread structure. When the traction height adjustment knob is rotated, the fixed shaft is driven to extend and retract; the traction wire retraction button drives the traction wire length adjustment shaft to rotate to retract and release the traction wire; the traction wire locker fixes the length of the traction wire by a fastening action; the lower surface of the table is provided with a scale mark, which is aligned with the sliding groove of the fixed shaft to indicate the front and rear positions of the fixed shaft.

[0020] Preferably, the intelligent adjustment configuration of the puller wire length adjustment axis of the dynamically adjustable animal surgical experimental operating table of the present invention includes: A control unit electrically connected to the tension sensor, the pull line take-up button, and the pull line locker; Preset parameter library, storing the maximum pulling tension threshold and reeling length limit corresponding to different experimental animal types; The dynamic control module is configured to calculate the amount of tension wire retraction and extension based on real-time tension data and preset thresholds using a proportional-integral-differential (PID) algorithm. When the instantaneous rate of change of tension is detected to be greater than 10N / s, it is judged as an abnormal impact and the pulling wire lock device is triggered to release instantly; the real-time tension curve and take-up length are displayed on the touch screen, and manual fine-tuning of parameters is supported; The control unit is also configured to automatically record the maximum tension value, pulling duration and abnormal events after the experiment, and generate an operation log for subsequent analysis.

[0021] Preferably, the dynamically adjustable animal surgical experimental operating table of the present invention further comprises: A tension sensor is provided at the fixed end of the pulling wire and is used to detect the tension of the pulling wire in real time; Infrared body temperature sensor and piezoelectric respiratory monitoring module, which are embedded in the upper surface of the platform to monitor the body temperature and respiratory rate of experimental animals; A control unit is integrated into the platform and electrically connected to the tension sensor, infrared body temperature sensor, and piezoelectric respiration monitoring module. The control unit is configured to: receive a detection signal from the tension sensor and, when the signal exceeds a preset threshold, control the pull line length adjustment shaft to stop rotating; receive detection data from the infrared body temperature sensor and the piezoelectric respiration monitoring module, and transmit the data to an external display screen via a wireless transmission module; The heating and heat preservation module is integrated inside the table and is electrically connected to the control unit; the control unit is also configured to adjust the working state of the heating and heat preservation module according to the detection data of body temperature and respiratory rate.

[0022] Preferably, the dynamically adjustable animal surgical experimental operating table of the present invention has a heating and heat preservation module comprising a plurality of heating units evenly distributed inside the table, wherein the heating units are electric heating films or resistance wires; The control unit is configured to: adjust the power output of the heating unit in a closed-loop control manner according to the body temperature data detected by the infrared body temperature sensor; When the body temperature data is lower than the preset temperature threshold, the heating unit is controlled to start heating; when the body temperature data is higher than the preset temperature threshold, the heating unit is controlled to stop heating; the heating unit and the detection area of ​​the infrared body temperature sensor are set at intervals, and the heating area of ​​the heating unit covers the non-detection area of ​​the table to avoid interfering with the measurement accuracy of the infrared body temperature sensor.

[0023] Preferably, in the dynamically adjustable animal surgical experimental operating table of the present invention, the piezoelectric respiratory monitoring module includes a plurality of piezoelectric sensors, which are evenly embedded in the central area of ​​the upper surface of the table and located directly below the position of contact with the chest of the experimental animal; the piezoelectric sensors are electrically connected to the control unit via a signal conditioning circuit, and the signal conditioning circuit includes an amplification module and a filtering module for converting the respiratory vibration signal detected by the piezoelectric sensor into a recognizable electrical signal; The control unit is configured to calculate the respiratory rate of the experimental animal based on the frequency and amplitude of the electrical signal; the installation position of the piezoelectric sensor is set at an interval from the heating area of ​​the heating and insulation module, and the signal conditioning circuit is configured to eliminate thermal noise interference when the heating unit is working.

[0024] Preferably, in the dynamically adjustable animal surgical experimental operating table of the present invention, the tension sensor is a strain gauge sensor or a piezoelectric sensor, which is fixed to the fixed end of the traction wire through a rigid connector, and the axis of the rigid connector is coaxially arranged with the traction direction of the traction wire; the output end of the tension sensor is electrically connected to the control unit through a signal conditioning circuit, and the signal conditioning circuit includes an amplification module, a low-pass filter module and an analog-to-digital conversion module, which is used to convert the tension signal into a digital signal; the control unit is configured to: calculate the traction wire tension in real time according to the amplitude of the digital signal, and when the tension exceeds a preset safety threshold, drive the traction wire length adjustment shaft to rotate in the opposite direction to release the tension; when the tension continues to exceed the threshold time for more than a preset time, trigger the sound and light alarm module to prompt the operator to intervene.

[0025] Preferably, in the dynamically adjustable animal surgical experimental operating table of the present invention, the thermal noise interference elimination of the signal conditioning circuit is achieved by the following means: a partitioned thermal isolation structure of the table plate, including: a physical separation of ≥8mm between the heating area and the sensing area; a high thermal conductivity aluminum plate with a thermal conductivity of 200-230W / m·K is arranged under the heating area, and a polyimide insulation layer with a thermal conductivity of 0.1-0.2W / m·K is arranged under the sensing area; a noise feature library pre-stored in the control unit contains thermal noise spectrum data of the heating unit at different power levels; a digital signal processing module is configured to: collect the frequency domain components of the respiratory signal in real time and perform pattern matching with the noise feature library; enable a digital notch filter to dynamically filter out the successfully matched noise frequency band of 50-200Hz; before the experimental animal is placed, record the baseline noise when the heating module is running at full power, and deduct the baseline noise component from the respiratory signal in real time during the experiment; the control unit is further configured to: automatically reduce the power of the heating module and trigger an alarm prompt when the temperature of the sensing area exceeds a preset threshold.

[0026] Preferably, the signal conditioning circuit of the dynamically adjustable animal surgical experimental operating table of the present invention includes: A differential amplifier module, whose input end is connected to at least two groups of symmetrically arranged piezoelectric sensors, for generating a differential breathing signal that cancels out environmental noise; A switchable bandpass filter bank with passbands preset to 1-4 Hz for rodent mode and 0.5-2 Hz for lagomorph mode, receiving species selection instructions via a mechanical band switch or wireless communication module; Dynamic baseline calibration module, which automatically collects 10-30 seconds of background noise in the apnea state before the experiment begins and generates a noise template. During the experiment, the time domain component of the template is subtracted from the respiratory signal in real time at a frequency of once per second; The control unit is configured to automatically adjust the attenuation slope of the bandpass filter group according to the amplitude fluctuation of the differential respiratory signal to ensure that the attenuation of the respiratory main frequency signal is ≤3dB; when the signal baseline drift exceeds the preset threshold, the sensor contact pressure adjustment mechanism is triggered to recalibrate the fit between the piezoelectric sensor and the animal's body surface.

[0027] The present invention has at least the following beneficial effects: The combined design of the fixed axis sliding slot and the front-to-back translation fixing button enables stepless adjustment of the front-to-back position of the fixed axis to meet the anatomical needs of different experimental animals. The traction line length adjustment axis and the traction line lock work together to ensure uniform tension during the traction line retraction and release process, avoiding the risk of overload caused by manual adjustment. The traction height adjustment button uses a high-precision thread pair, and the vertical adjustment resolution can reach 0.1mm, significantly improving the experimental positioning accuracy. The overall structure integrates multiple degrees of freedom adjustment functions within a limited space, reducing the time-consuming operation steps and is suitable for complex surgical scenarios.

[0028] Standardized interface designs (such as the Type-C power port and universal device slot) are compatible with mainstream external devices, simplifying the connection process for devices such as anesthesia masks and electrophysiology machines. The modular layout of the expansion area eliminates cable clutter and reduces experiment preparation time by over 30%. The slot-type mechanical locking ensures the stability of peripheral installation and reduces data acquisition errors caused by loose equipment during experiments.

[0029] The differential thread structure converts rotational motion into micron-level linear displacement, achieving vertical adjustment accuracy over five times greater than conventional threads. The aligned scale markings and sliding slots allow the operator to quickly locate the front and rear coordinates of the fixed axis, reducing trial and error. The puller wire lock utilizes a dual ratchet and buckle locking mechanism to maintain constant tension at any puller wire length, preventing positioning errors caused by wire slippage during experiments.

[0030] The PID algorithm uses closed-loop control to control the pulling force, keeping the tension fluctuation range within ±5%, significantly reducing the risk of tissue damage in experimental animals. A preset parameter library (e.g., a threshold of 2N for a mouse at 30g) enables "one-click" experimental mode switching, avoiding manual setting errors. The transient impact detection module has a response time of <50ms, quickly releasing the pulling line (7) when the animal struggles, improving operational safety. The touch screen visualization interface supports real-time data monitoring and historical log export, providing a complete data chain for experimental reproduction and result analysis.

[0031] Multi-sensor fusion monitoring (tension, body temperature, and respiration) forms a closed-loop feedback system. When body temperature falls below a threshold, the heating module automatically activates to maintain the animal's physiological state. A wireless transmission module (such as Bluetooth 5.0) supports multi-terminal data synchronization, allowing operators to remotely monitor experimental progress via an external display, minimizing direct interference with experimental animals. The piezoelectric respiration monitoring module has a sampling frequency of 100Hz, capable of capturing minute respiratory vibration signals and suitable for low-amplitude respiration monitoring under anesthesia.

[0032] Distributed heating units (such as 12-zone heating film) ensure uniform temperature across the tabletop (temperature difference ≤ ±0.5°C), preventing localized overheating that can cause discomfort to animals. Physical separation between the heating and sensing zones (≥8mm), combined with a polyimide insulation layer, reduces heat conduction interference to less than 0.1°C, ensuring accurate temperature monitoring data. A closed-loop temperature control algorithm dynamically adjusts heating power based on real-time body temperature, reducing energy consumption by 40% compared to traditional constant temperature systems.

[0033] A piezoelectric sensor array (e.g., a 4×4 matrix) covers the projected area of ​​the animal's chest cavity. Differential signal synthesis offsets tabletop vibration noise, improving the respiratory signal-to-noise ratio to over 35dB. A bandpass filter (0.1-5Hz) precisely extracts the respiratory frequency signal, suppressing high-frequency mechanical noise and low-frequency thermal drift. The sensors are spaced apart from the heating area (≥10mm apart) and combined with an aluminum-based heat sink to attenuate thermal noise to less than 5% of the original signal.

[0034] The coaxial rigid connection design eliminates lateral force interference, achieving a tension measurement error of less than 1%. A low-pass filter (20Hz cutoff frequency) effectively filters out high-frequency noise generated by animal struggles, ensuring signal authenticity. The analog-to-digital conversion module (16-bit resolution) updates tension values ​​in milliseconds, with a control unit response delay of less than 10ms. An audible and visual alarm module (LED + buzzer) provides dual warnings in the event of overload, reducing the risk of experimental accidents caused by human negligence.

[0035] The layered layout of high- and low-thermal conductive materials increases heat conduction path isolation to 90%, ensuring temperature fluctuations in the sensing area of ​​≤±0.3°C. A digital notch filter dynamically adjusts its center frequency based on pre-stored noise signatures, achieving a thermal noise suppression depth of -40dB. A baseline noise subtraction algorithm eliminates sensor background drift, ensuring respiratory rate calculation error of less than 0.5 breaths / minute. A temperature-linked power control mechanism prevents thermal runaway, ensuring the safety of both experimental animals and equipment.

[0036] Differential signal synthesis technology improves the suppression ratio of common-mode environmental noise (such as equipment vibration) to over 60dB. A species-adaptive filter bank rapidly switches frequency bands via a mechanical switch, eliminating manual parameter adjustments during cross-species experiments. A dynamic baseline calibration module updates the noise template every second, effectively eliminating signal offsets caused by sensor temperature drift. A contact pressure adjustment mechanism (e.g., a micro-pneumatic actuator) ensures a close fit between the piezoelectric sensor and the animal's surface, improving signal amplitude stability by 30%.

[0037] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the overall structure of a dynamically adjustable animal surgical experimental operating table in one of the technical solutions of the present invention; Figure 2 This is a schematic diagram of the connection between the fixed shaft and the table in one of the technical solutions of the present invention; Figure 3 This is a schematic diagram of the fixed shaft structure in one of the technical solutions of the present invention; Among them, 1-table, 2-fixed axis sliding groove, 3-fixed axis, 4-front expandable area, 5-right expandable area, 6-pull wire length adjustment axis, 7-pull wire, 8-pull wire take-up button, 9-pull wire locker, 10-pull height adjustment button, 11-front and rear translation fixing button. DETAILED DESCRIPTION

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0040] According to one embodiment of the present invention, a dynamically adjustable animal surgical experimental operating table is provided, comprising: A table 1 is provided with a fixed shaft sliding groove 2 on each of the left and right sides of its upper surface. A sliding hole extending along its length direction is provided on the bottom wall of the fixed shaft sliding groove 2. Two fixed shafts 3 are slidably arranged in each fixed shaft sliding groove 2. The bottom of the fixed shaft 3 passes through the sliding hole. A forward and backward translation fixing button 11 is provided on the fixed shaft 3 located below the table 1. When the fixed shaft 3 slides to the desired position, it is locked and fixed to the fixed shaft sliding groove 2 by the forward and backward translation fixing button 11. The pulling wire length adjustment shaft 6 is coaxially arranged on the top of the fixed shaft 3 and driven to rotate by the pulling wire take-up button 8. The pulling wire 7 is wound around the pulling wire length adjustment shaft 6. One end of the pulling wire 7 is connected to the pulling wire length adjustment shaft 6, and the other end passes through the pulling wire length adjustment shaft 6, passes through the pulling wire locker 9 and the guide wheel in sequence, and is used to tie the animal body and is locked and fixed by the pulling wire locker 9. The pulling wire locker 9 is installed at the cable outlet end of the pulling wire length adjustment shaft 6; The pulling height adjustment button 10 is installed on the side wall of the fixed shaft 3 through threaded engagement, and is used to drive the fixed shaft 3 to extend and extend.

[0041] In this technical solution, a fixed-axis sliding groove 2 is provided on each of the left and right sides of the upper surface of the table 1, and the bottom wall of the fixed-axis sliding groove 2 is provided with a sliding hole extending along the length direction (i.e., the front-to-back direction of the table). The length of the fixed-axis sliding groove 2 can be set to 700 mm, and the width of the sliding hole can be selected to be 12 mm. The main body of the table can be made of 6061 aluminum alloy material, and the surface is anodized to improve wear resistance. A polytetrafluoroethylene pad can be added to the inner wall of the fixed-axis sliding groove 2 to reduce the sliding friction coefficient. The distance between the fixed-axis sliding groove 2 and the left and right edges of the table can be set to 50 mm to ensure that the fixed axis 3 does not exceed the range of the table when moving. The processing of the fixed-axis sliding groove 2 can be completed by a CNC milling machine, and the concentricity error of the groove body of the fixed-axis sliding groove 2 and the sliding hole is controlled within ±0.1 mm.

[0042] Two fixed shafts 3 slide within each fixed shaft sliding slot 2. The fixed shafts 3 have a diameter of less than 12 mm and are made of 304 stainless steel. After the bottom of the fixed shaft 3 passes through the sliding hole, a forward and backward translation locking button 11 is installed on the fixed shaft 3 below the table 1. When the fixed shaft 3 slides to the desired position, the forward and backward translation locking button 11 locks the fixed shaft 3. The clearance between the fixed shaft 3 and the sliding hole can be controlled to 0.2-0.5 mm, ensuring smooth and smooth sliding without shaking.

[0043] A traction line length adjustment shaft 6 is coaxially mounted on top of the fixed shaft 3 and is driven to rotate by a traction line take-up knob 8. The diameter of the traction line length adjustment shaft 6 can be 8 mm and made of a hard aluminum alloy. A traction line 7 is wound around the traction line length adjustment shaft 6. One end of the traction line 7 is connected to the traction line length adjustment shaft 6, and the other end passes through the traction line length adjustment shaft 6. After passing through the traction line locker 9 and the guide wheel, it is used to bind the animal's body and is locked and fixed by the traction line locker 9. The traction line locker 9 is installed at the cable outlet end of the traction line length adjustment shaft 6. The traction line 7 can have a diameter of 0.3 mm and a breaking strength of ≥20N. The tension threshold can be set to 2N, and the protection mechanism is triggered when the tension exceeds 2N. The traction line take-up knob 8 can be configured as a speed-adjustable stepper motor, whose output shaft is connected to the traction line length adjustment shaft 6 to drive the rotation of the traction line length adjustment shaft 6. The traction line take-up knob 8 is equipped with an encoder to achieve precise retraction and release. The pulling wire locker 9 can be an electromagnetic brake, and the locking force can be adjusted in the range of 1-5N.

[0044] Operation: During operation, adjust the forward and backward translation knob 11 to loosen the fixed shaft 3. Move the fixed shaft 3 along the fixed shaft sliding slot 2 to the desired position, and then adjust the locking knob 11 to lock the fixed shaft 3. Rotate the pull height adjustment knob 10 to extend and lower the fixed shaft 3 via a threaded drive, with graduated markings assisting with positioning. The pull line retraction knob 8 rotates the pull line length adjustment shaft 6, releasing or tightening the pull line 7. The pull line lock 9 secures the line length when tightened. A tension sensor monitors the pulling force in real time and automatically stops retraction when it exceeds 2N.

[0045] The structural design of the fixed shaft sliding groove 2 and the fixed shaft 3 enables precise horizontal adjustment of the animal's position. The polytetrafluoroethylene pad reduces frictional resistance and improves operational smoothness. The locking mechanism of the fixed shaft 3 ensures positioning stability through locking control, avoiding displacement caused by vibration during the experiment. The retractable wire design of the traction wire length adjustment shaft 6, combined with the clamping force control of the traction wire lock 9, ensures uniform traction tension and reduces the risk of animal tissue damage. The threaded transmission structure of the traction height adjustment knob 10 provides micron-level precision adjustment in the vertical direction, meeting the needs of complex surgery for multi-dimensional position control.

[0046] In the present technical solution, the locking and limiting structure of the fixed shaft 3 can be: a square limiting plate is provided on the outer periphery of the fixed shaft 3 and is slidably arranged in the fixed shaft sliding groove 2, and a pair of side edges of the limiting plate are parallel and tangent to the fixed shaft sliding groove 2 to prevent the fixed shaft 3 from rotating at will; the front and rear translation fixing button 11 is a fixing nut, which is sleeved on the fixed shaft 3 and connected to the fixed shaft 3 through a threaded structure; when it is necessary to fix the position of the fixed shaft 3, tighten the front and rear translation fixing button 11, which together with the limiting plate clamps the bottom wall of the fixed shaft sliding groove 2 to lock the fixed shaft 3 and the fixed shaft sliding groove 2; when it is necessary to move the position of the fixed shaft 3, rotate the front and rear translation fixing button 11 in the opposite direction to loosen it, and a gap is generated between it and the bottom wall of the fixed shaft sliding groove 2, so that the fixed shaft 3 is loosened, and then moved along the sliding hole.

[0047] It also includes a tension sensor, which is arranged at the fixed end of the pulling wire; an infrared body temperature sensor and a piezoelectric respiratory monitoring module, which are embedded in the upper surface of the table; a control unit is integrated inside the table and electrically connected to the tension sensor, infrared body temperature sensor and piezoelectric respiratory monitoring module; a heating and insulation module is integrated inside the table and electrically connected to the control unit.

[0048] Value Selection: The tension sensor has a range of 0-10N, with an accuracy of ±0.1N. The infrared temperature sensor has a temperature measurement range of 30-42°C, with a resolution of 0.1°C. The piezoelectric respiration monitoring module has a sampling frequency of 100Hz and a passband of 0.1-5Hz. The heating and insulation module has a temperature control threshold of 37°C, with a fluctuation range of ±0.5°C. The thermal noise suppression frequency range is 50-200Hz, with a suppression depth of ≥40dB.

[0049] The tension sensor can be a strain gauge sensor with a range of 10N and an output signal of 0-5V. The infrared body temperature sensor can be a non-contact thermopile sensor with a field of view of 10°. The piezoelectric respiration monitoring module can use a PVDF piezoelectric film sensor with a thickness of 0.2mm. The control unit can use an embedded microcontroller with a main frequency of 72MHz. The heating and insulation module can use a flexible electric heating film with a power density of 0.5W / cm².

[0050] Material Selection: The piezoelectric sensor's sensitive material can be lead zirconate titanate ceramic with a dielectric constant ≥1500. The thermal insulation layer can be made of polyimide film with a thermal conductivity of 0.12 W / m·K. The heating film substrate can be made of polyimide with a temperature resistance of 200°C. The signal conditioning circuit's amplifier module can use a low-noise operational amplifier with an input noise of ≤3 nV / √Hz. The tension sensor is fixed to the fixed end of the pulling wire 7 through a rigid connector, and its axis is coaxial with the pulling direction. The infrared body temperature sensor is embedded in the front area of ​​the upper surface of the table 1, and the detection area has a diameter of 10mm. The sensor array of the piezoelectric respiratory monitoring module is arranged in the central area of ​​the table 1, covering an area of ​​50mm×50mm. The control unit is installed in the back cavity of the table 1 and is connected to each sensor through a cable. The electric heating film of the heating and insulation module is evenly laid on the middle layer of the table 1, 8mm away from the sensing area.

[0051] Working process: After the experimental animal is placed, the tension sensor collects real-time pulling force data. When the force exceeds 2N, the control unit drives the pull line length adjustment shaft 6 to reverse and release the tension. The infrared body temperature sensor checks the body surface temperature every 5 seconds and activates the heating module when it falls below 37°C. The piezoelectric sensor captures the respiratory vibration signal, extracts the 0.1-5Hz component through bandpass filtering, and calculates the respiratory rate. The control unit transmits the data to an external display via a wireless module and simultaneously records the operation log. The heating module adjusts the power based on body temperature feedback to maintain a constant table temperature.

[0052] Thermal noise interference in the signal conditioning circuit is eliminated through the partitioned thermal isolation structure of the tabletop, with the physical distance between the heating area and the sensing area being ≥8mm; a high thermal conductivity aluminum plate is set under the heating area, and a polyimide insulation layer is set under the sensing area; a noise feature library is pre-stored in the control unit; and a digital notch filter is enabled in the digital signal processing module.

[0053] The physical separation between the heating and sensing areas can be set to 8-10 mm. The high-thermal-conductivity aluminum plate has a thermal conductivity of 220 W / m·K and a thickness of 2 mm. The polyimide insulation layer has a thermal conductivity of 0.15 W / m·K and a thickness of 1 mm. The digital notch filter has a center frequency of 100 Hz and a bandwidth of 10 Hz. Baseline noise subtraction is performed once per second.

[0054] The high thermal conductivity aluminum plate can be made of 6061 aluminum alloy with a frosted surface. The polyimide thermal insulation layer can be a commercially available standard film with a temperature resistance of 180°C. The digital signal processing module can use a DSP chip with floating-point support. The notch filter can use an IIR digital filter with a -40dB attenuation depth. The noise signature library can be stored in a 1MB FLASH memory.

[0055] The aluminum plate can be made of pure aluminum or aluminum alloy with a thermal conductivity of ≥200 W / m·K. The polyimide film can be DuPont Kapton series with a dielectric strength of 100 kV / mm. The PCB substrate for the signal conditioning circuit can be FR-4 with a copper thickness of 1 oz. Shielded twisted-pair cable with an impedance of 120 Ω can be used for the connection.

[0056] A high-thermal-conductivity aluminum plate is installed below the heating zone, in direct contact with the heating film. A polyimide insulation layer is applied to the bottom of the sensing area, 8 mm from the aluminum plate. The digital signal processing module is integrated on the control unit's PCB, near the analog signal input interface. The notch filter parameters are stored in the control unit's EEPROM and can be accessed via software. The noise signature library data is experimentally calibrated and then burned into memory.

[0057] Working Process: When the heating module is operating, the aluminum plate rapidly conducts heat, reducing local temperature rise. The polyimide layer blocks heat conduction, keeping temperature fluctuations in the sensing area to ≤0.3°C. The digital signal processing module collects respiratory signals in real time, matches the spectral data in the noise signature library, and activates notch filtering in the 50-200Hz frequency band. Before the experiment, the baseline noise of the heating module running at full power is recorded, and the baseline component is subtracted once per second during the experiment. If the temperature in the sensing area exceeds 38°C, the control unit reduces the heating power and triggers an alarm.

[0058] According to another embodiment of the present invention, a dynamically adjustable animal surgical experimental operating table is provided, which also includes a front expandable area 4, which is arranged at the front edge of the table top 1 and is configured as an external gas anesthesia mask; a right expandable area 5, which is arranged at the right edge of the table top 1 and is configured as an external power board; the front expandable area 4 and the right expandable area 5 are respectively provided with standard interfaces.

[0059] The connector spacing in the front expandable area 4 can be set to 20mm, and the power connector voltage range is selectable from 5V to 12V. The device slot in the right expandable area 5 can be designed to be 25mm wide and 10mm deep. The standard connector has a plug-in / plug-out lifespan of 5000 times, with a contact resistance of ≤0.1Ω.

[0060] The front expandable area 4 supports a Type-C female connector, supporting bidirectional power delivery. The power board in the right expandable area 5 supports a universal DC input module with a maximum current of 2A. The device slot supports a pogo pin connector, accommodating a variety of external devices.

[0061] The conductive terminals of the interface can be made of gold-plated phosphor bronze with a thickness of 0.2mm. The housing of the card slot can be made of ABS plastic with an impact strength of ≥50kJ / m². The insulation layer of the power board can be made of polyimide film with a withstand voltage rating of 300V.

[0062] The front expandable area 4 is located in the middle of the upper edge of the deck 1, with the center of the connector 15 mm from the deck edge. The right expandable area 5 is located at the front right side of the deck 1, with the card slot opening facing outward. The pins of the standard connector are connected to the control unit via a flat cable.

[0063] Operation: The external anesthesia mask is powered via the Type-C port in the front expandable area 4, and the power board is secured in place via a slot in the right expandable area 5. When the device is plugged in, the spring-loaded connector automatically connects the power and signal lines. The control unit detects the connection and switches to the corresponding operating mode.

[0064] The pulling height adjustment button 10 is a tube that is sleeved on the outer periphery of the fixed shaft 3 and is connected to the fixed shaft 3 through a differential thread structure. When the pulling height adjustment button 10 is rotated, it drives the fixed shaft 3 to extend and retract; the pulling wire retracting button 8 drives the pulling wire length adjustment shaft 6 to rotate to retract and release the pulling wire 7; the pulling wire locker 9 fixes the length of the pulling wire 7 by fastening; the lower surface of the table 1 is provided with a scale mark, which is aligned with the fixed shaft sliding groove 2 to indicate the front and rear positions of the fixed shaft 3.

[0065] The pulling height adjustment knob 10 is mounted on the outer periphery of the fixed shaft 3 and can use a differential thread structure with an M8×0.75 mm pitch. The material is brass, and the thread engagement length is designed to be 15 mm. The outer diameter of the pulling height adjustment knob 10 can be set to 20 mm, and the surface is knurled to increase friction. The lead difference of the differential screw is 0.25 mm / turn. Each rotation of the pulling height adjustment knob 10 can extend or lower the fixed shaft 3 by 0.5 mm, with an adjustment range of 0-50 mm. The pulling wire locker 9 can use a lever-type quick clamping device with a clamping force adjustment range of 4-6N. The installation position of the pulling wire locker 9 is close to the outlet end of the pulling wire 7 to ensure that the pulling wire 7 maintains a straight path before locking.

[0066] The scale markings on the lower surface of the table 1 can be laser engraved, with the scale lines calibrated using laser interference, with a width of 0.1 mm, a spacing of 1 mm, and an accuracy error of ≤±0.2 mm. The scale marking area can cover the entire length of the fixed shaft sliding groove 2, with digital markings every 50 mm. A 2 mm wide pointer can be installed at the bottom of the fixed shaft 3, with the pointer tip aligned with the scale lines. Transparent observation windows made of polycarbonate material, 3 mm thick, can be installed on both sides of the fixed shaft sliding groove 2. The observation windows are 5 mm from the scale surface to facilitate reading position data from an oblique perspective. The calibration of the scale markings can be completed using a three-dimensional coordinate measuring machine, and the repeatability accuracy requirement is ≤0.1 mm.

[0067] The differential thread structure enables micron-level height adjustment. The lever clamping mechanism of the puller wire lock (9) uses a preset clamping force range to prevent overtightening and damage to the puller wire (7), while ensuring locking reliability. The combination of a laser scale and a transparent observation window improves position calibration efficiency and reduces manual measurement time.

[0068] Operation: Rotating the pull-height adjustment knob 10 causes the differential screw to extend or extend the fixed shaft 3, changing its length. This in turn adjusts the pull height of the pull-wire adjustment shaft 6 and the pull-wire 7 at its top. A scale mark assists with positioning. Each rotation of the pull-wire take-up knob 8 releases or tightens the pull-wire adjustment shaft 6 by 2 mm. The operator adjusts the front-to-back position of the fixed shaft 3 by observing the scale mark.

[0069] The technical solution may also specifically include: the inner wall of the pulling height adjustment button 10 is respectively provided with internal threads with different pitches but the same rotation direction in the upper and lower sections; the fixed shaft 3 includes an upper half and a lower half, and is respectively provided with external threads matching the internal threads; the bottom of the upper half fixed shaft is provided with a non-circular limiting rod coaxial with it; the axis of the lower half fixed shaft is provided with a non-circular limiting hole matching the shape of the limiting rod, and the limiting rod is slidably inserted into the limiting hole. When adjusting the telescopic length of the fixed shaft 3, the pulling height adjustment button 10 is rotated, and under the limiting action of the fixed shaft sliding groove 2, the limiting plate, the limiting hole, and the limiting rod, the fixed shaft 3 can only be extended and retracted along its axial direction to change its length, thereby adjusting the pulling height of the pulling wire length adjustment shaft 6 and the pulling wire 7 at its top; the limiting plate is clamped in the fixed shaft sliding groove 2 to prevent the fixed shaft from rotating at will; the limiting hole and the limiting rod prevent the upper half fixed shaft and the lower half fixed shaft from rotating relative to each other.

[0070] According to another embodiment of the present invention, a dynamically adjustable animal surgical experimental operating table is provided, wherein the intelligent adjustment configuration of the puller wire length adjustment shaft 6 includes a control unit, a preset parameter library, and a dynamic control module.

[0071] The PID algorithm's proportional coefficient can be set to 0.8, the integral time to 0.5s, and the differential time to 0.2s. The maximum tension threshold can be set based on the animal type, for example, 2N for mice and 5N for rats. The abnormal impact threshold can be set to a tension change rate greater than 10N / s and a response time less than 50ms.

[0072] The PID algorithm is used to close the loop to control the tension of the pulling wire. The proportional coefficient acts on the tension error, the integral term eliminates the steady-state error, and the differential term suppresses overshoot.

[0073] The control unit can utilize an ARM Cortex-M4 microcontroller with a main frequency of 100MHz. The preset parameter library can be stored on a 32GB SD card. The dynamic control module can utilize a PWM drive circuit with a frequency of 1kHz. The touchscreen can utilize a 7-inch capacitive screen with a resolution of 800×480.

[0074] The microcontroller's PCB substrate can be FR-4 with a 2oz copper thickness. The SD card interface can use a pogo pin connector with a 0.5μm gold plating thickness. The MOSFET for the PWM drive circuit can be an N-channel type with a withstand voltage of 30V.

[0075] The control unit is mounted on the left side of the back cavity of the deck 1 and connected to the touchscreen via an FPC cable. The SD card slot is located below the expandable area 5 on the right side of the deck 1. The PWM drive circuit is integrated on the control unit's PCB, near the motor interface.

[0076] Working process: Before the experiment, the animal type is selected via the touchscreen, and the control unit loads the corresponding tension threshold from the parameter library. During the pulling process, the PID algorithm adjusts the line retraction amount in real time to maintain stable tension. If a sudden change in tension is detected, the pulling line lock 9 instantly releases the pulling line 7, and the touchscreen records the event time and peak tension.

[0077] The heating and heat preservation module includes multiple heating units, and the control unit adjusts the power according to body temperature data.

[0078] The number of heating units can be set to 12, with a single zone power of 5W and a total power of 60W. The temperature control threshold can be set to 37°C, with a tolerance of ±0.5°C. The thickness of the thermally conductive aluminum plate can be selected to be 2mm, with an area ratio of 70%.

[0079] The heating unit can use a polyimide heating film with a size of 20mm×20mm. The temperature sensor can use a DS18B20 digital probe with an accuracy of ±0.2°C. The power regulation module can use a solid-state relay with a switching frequency of 1Hz.

[0080] The base of the electric heating film can be made of polyimide, which has a temperature resistance of 200°C. The heat-conducting aluminum plate can be made of 6063 aluminum alloy with a sandblasted surface. The polyimide film of the thermal insulation layer can be DuPont Kapton HN, with a thickness of 0.05mm.

[0081] The heating film is evenly distributed across the middle layer of platen 1, spaced 8mm apart. A thermally conductive aluminum plate is attached beneath the heating film, covering 70% of platen 1. A 1mm thick polyimide insulation layer is located between the aluminum plate and the sensing area.

[0082] Working Process: When the infrared temperature sensor detects an animal's surface temperature below 37°C, the control unit gradually increases the heating power using a PID algorithm. Temperature data is updated every 5 seconds, with a power adjustment step of 1%. If the temperature exceeds 37.5°C, the heating module shuts down completely and a buzzer sounds to indicate overheating.

[0083] The piezoelectric respiration monitoring module includes a piezoelectric sensor and a signal conditioning circuit.

[0084] Value Selection: The number of piezoelectric sensors can be set to 4, with a spacing of 20 mm. The gain of the signal conditioning circuit can be set to 100 times, with a passband of 0.1-5 Hz. The respiratory rate calculation period can be set to 10 seconds, with an error of <0.5 breaths / minute. The piezoelectric sensor can be a PVDF thin film sensor with a thickness of 0.2 mm. The amplifier module can be an instrumentation amplifier with an input noise of ≤1 μV. The filter module can be a second-order active low-pass filter with a cutoff frequency of 5 Hz.

[0085] The PVDF film can be a 0.2mm thick flexible sheet with a Curie temperature of 100°C. The amplifier's PCB substrate can be FR-4 with a 1oz copper thickness. The filter capacitor can be a C0G ceramic capacitor with a capacitance of 1nF.

[0086] Mounting Location: The piezoelectric sensor is embedded in the center of the top surface of platform 1, covering an area 50 mm x 50 mm. The signal conditioning circuit is installed in a metal shielded box on the back of platform 1, near the control unit. Use shielded twisted-pair cable for the sensor leads, ≤ 100 mm in length.

[0087] Working process: A piezoelectric sensor detects the animal's chest vibration signal, amplifies and filters it, and extracts the 0.1-5Hz respiratory component. A control unit calculates the number of peaks per second to determine the respiratory rate. If the signal baseline drifts by more than 0.5V, the contact pressure adjustment mechanism is triggered to re-attach the sensor.

[0088] The tension sensor is a strain gauge type or piezoelectric type, and the signal conditioning circuit includes amplification, filtering, and analog-to-digital conversion modules.

[0089] The strain gauge sensor has a range of 0-10N and a sensitivity of 2mV / V. The low-pass filter cutoff frequency can be set to 20Hz, with an attenuation slope of -40dB / dec. The analog-to-digital converter resolution can be set to 16 bits, with a sampling rate of 1kHz.

[0090] The strain gauge can use a 350Ω bridge structure with a polyimide substrate. The amplification module can use a differential amplifier with a common-mode rejection ratio of ≥100dB. The analog-to-digital conversion module can use a Σ-Δ ADC with an integral nonlinearity of ±2LSB.

[0091] The strain gauge's sensitive grid can be made of 0.03mm thick Constantan copper foil. The differential amplifier's op amp can be a zero-drift type with a bias voltage ≤1μV. The ADC's reference voltage source can be a low-drift type with a drift ≤3ppm / °C.

[0092] The strain gauge is attached to the axial surface of the rigid connector, aligned with the pulling direction of the pull wire 7. The amplification module and filter are integrated into the tension sensor housing, and the analog-to-digital conversion module is located on the control unit's PCB. The signal cable uses a shielded twisted pair cable with a length of ≤200mm.

[0093] Working process: The tension sensor outputs a millivolt signal, which is amplified and filtered before being converted to a 0-5V analog value. The ADC samples at a 1kHz rate, and the control unit calculates the real-time tension value. When the tension exceeds a set threshold (e.g., 2N) for 500ms, an audible and visual alarm is triggered, and the pull line 7 is automatically released.

[0094] The signal conditioning circuit includes a differential amplifier module, a switchable bandpass filter group, and a dynamic baseline calibration module.

[0095] Value Selection: The common-mode rejection ratio of the differential amplifier module can be set to ≥60dB, and the gain error can be set to ≤0.1%. The bandpass filter can be set to 1-4Hz for rodents and 0.5-2Hz for rabbits. The baseline calibration time can be set to 20 seconds, and the noise subtraction period can be set to 1 second.

[0096] The differential amplifier can be an INA128 instrumentation amplifier with a gain of 100. The bandpass filter bank can be a switched capacitor filter with a switching time of less than 10ms. The baseline calibration module can be a 24-bit ADC with a sampling rate of 10Hz.

[0097] The amplifier's resistor network can use low-temperature drift metal film resistors with a temperature drift of ≤25ppm / °C. The filter capacitors can be made of NP0 ceramic with a capacitance of 10nF. The calibration module's reference source can be the LTZ1000 with a noise level of 1μVpp.

[0098] The differential amplifier inputs are connected to two symmetrical piezoelectric sensors, spaced 40 mm apart. A bandpass filter bank is installed in a slot in the signal conditioning circuit, with mode selection via a jumper. The baseline calibration module is integrated into the control unit's FPGA, near the ADC unit.

[0099] Working Process: Before the experiment begins, the dynamic baseline calibration module collects 20 seconds of ambient noise and generates a template. During the experiment, the template component is subtracted from the respiration signal every second. The operator selects the animal type using a mechanical switch, and the bandpass filter automatically switches to the corresponding frequency band. If the signal amplitude fluctuates by more than 50%, the contact pressure adjustment mechanism automatically adjusts the sensor fit.

[0100] Technical effect: 1. The differential screw and scale mark can achieve 0.1mm vertical positioning of the fixed axis 3, reducing manual adjustment errors.

[0101] 2. Standardized expansion interface supports quick connection between anesthesia mask and power supply equipment, shortening experimental preparation time.

[0102] 3. PID closed-loop control limits the fluctuation of pulling tension to within ±5%, reducing the risk of animal tissue damage.

[0103] 4. Distributed heating modules are combined with thermal insulation design to maintain table temperature uniformity (temperature difference ≤ ±0.5℃).

[0104] 5. The piezoelectric sensor array and dynamic filtering algorithm extract effective breathing signals with a signal-to-noise ratio of ≥35dB.

[0105] 6. Baseline noise subtraction and notch filtering suppress thermal interference, and the respiratory rate measurement error is less than 0.5 times / minute.

[0106] 7. Multi-sensor data fusion and wireless transmission enable remote monitoring of the experimental process and reduce human interference.

[0107] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. Dynamically adjustable animal surgical experimental operating table, including: A table (1) is provided with a fixed shaft sliding groove (2) on each of the left and right sides of its upper surface, a sliding hole extending along the length direction thereof is provided on the bottom wall of the fixed shaft sliding groove (2), two fixed shafts (3) are slidably provided in each fixed shaft sliding groove (2), the bottom of the fixed shaft (3) passes through the sliding hole, and a front-back translation fixing button (11) is provided on the fixed shaft (3) below the table (1), and when the fixed shaft (3) slides to a desired position, it is locked and fixed with the fixed shaft sliding groove (2) by the front-back translation fixing button (11); A pulling line length adjustment shaft (6) is coaxially arranged on the top of the fixed shaft (3) and driven to rotate by a pulling line take-up button (8). A pulling line (7) is wound around the pulling line length adjustment shaft (6). One end of the pulling line (7) is connected to the pulling line length adjustment shaft (6), and the other end passes through the pulling line length adjustment shaft (6), passes through the pulling line locker (9) and the guide wheel in sequence, and is used to tie the animal body and is locked and fixed by the pulling line locker (9). The pulling line locker (9) is installed at the cable outlet end of the pulling line length adjustment shaft (6); A pulling height adjustment button (10) is mounted on the side wall of the fixed shaft (3) through threaded engagement and is used to drive the fixed shaft (3) to extend and extend.

2. The dynamically adjustable animal surgical experimental operating table according to claim 1, characterized in that: Also includes: A front expandable area (4) disposed at the front edge of the table (1) and configured to receive an external gas anesthesia mask; a right expandable area (5), which is located at the right edge of the table (1) and is configured as an external power supply board; The front expandable area (4) and the right expandable area (5) are respectively provided with standard interfaces, and the standard interfaces include a power interface and a device card slot.

3. The dynamically adjustable animal surgical experimental operating table according to claim 1 or 2, characterized in that: The pulling height adjustment button (10) is a tube sleeved on the outer periphery of the fixed shaft (3) and connected to the fixed shaft (3) through a differential thread structure. When the pulling height adjustment button (10) is rotated, the fixed shaft (3) is driven to extend and retract. The pulling wire retracting button (8) drives the pulling wire length adjustment shaft (6) to rotate to retract and release the pulling wire (7). The pulling wire locker (9) fixes the length of the pulling wire (7) by a fastening action. The lower surface of the table (1) is provided with a scale mark, which is aligned with the fixed shaft sliding groove (2) and is used to indicate the front and rear positions of the fixed shaft (3).

4. The dynamically adjustable animal surgical experimental operating table according to claim 1, characterized in that: The intelligent adjustment configuration of the pull line length adjustment shaft (6) includes: A control unit electrically connected to the tension sensor, the pull line take-up button (8) and the pull line locker (9); Preset parameter library, storing the maximum pulling tension threshold and reeling length limit corresponding to different experimental animal types; The dynamic control module is configured to calculate the amount of tension wire retraction and extension based on real-time tension data and preset thresholds using a proportional-integral-differential (PID) algorithm. When the instantaneous rate of change of tension is detected to be greater than 10N / s, it is judged as an abnormal impact and the pulling wire lock device is triggered to release instantly; the real-time tension curve and take-up length are displayed on the touch screen, and manual fine-tuning of parameters is supported; The control unit is also configured to automatically record the maximum tension value, pulling duration and abnormal events after the experiment, and generate an operation log for subsequent analysis.

5. The dynamically adjustable animal surgical experimental operating table according to claim 1, characterized in that: Also includes: A tension sensor is provided at the fixed end of the pulling wire and is used to detect the tension of the pulling wire in real time; Infrared body temperature sensor and piezoelectric respiratory monitoring module, which are embedded in the upper surface of the platform to monitor the body temperature and respiratory rate of experimental animals; A control unit is integrated into the platform and electrically connected to the tension sensor, infrared body temperature sensor, and piezoelectric respiration monitoring module. The control unit is configured to: receive a detection signal from the tension sensor and, when the signal exceeds a preset threshold, control the pull line length adjustment shaft to stop rotating; receive detection data from the infrared body temperature sensor and the piezoelectric respiration monitoring module, and transmit the data to an external display screen via a wireless transmission module; The heating and heat preservation module is integrated inside the table and is electrically connected to the control unit; the control unit is also configured to adjust the working state of the heating and heat preservation module according to the detection data of body temperature and respiratory rate.

6. The dynamically adjustable animal surgical experimental operating table according to claim 5, characterized in that: The heating and insulation module includes multiple heating units evenly distributed inside the table, and the heating units are electric heating films or resistance wires; The control unit is configured as: According to the body temperature data detected by the infrared body temperature sensor, the power output of the heating unit is adjusted in a closed-loop control manner; When the body temperature data is lower than the preset temperature threshold, the heating unit is controlled to start heating; When the body temperature data is higher than the preset temperature threshold, the heating unit is controlled to stop heating; The heating unit is spaced apart from the detection area of ​​the infrared body temperature sensor, and the heating area of ​​the heating unit covers the non-detection area of ​​the table to avoid interfering with the measurement accuracy of the infrared body temperature sensor.

7. The dynamically adjustable animal surgical experimental operating table according to claim 5, characterized in that: The piezoelectric respiratory monitoring module includes multiple piezoelectric sensors, which are evenly embedded in the central area of ​​the upper surface of the platform and are located directly below the contact position with the chest cavity of the experimental animal; The piezoelectric sensor is electrically connected to the control unit through a signal conditioning circuit. The signal conditioning circuit includes an amplification module and a filtering module, which is used to convert the respiratory vibration signal detected by the piezoelectric sensor into a recognizable electrical signal; The control unit is configured as: Calculate the respiratory rate of experimental animals based on the frequency and amplitude of the electrical signal; The installation position of the piezoelectric sensor is spaced apart from the heating area of ​​the heating and heat preservation module, and the signal conditioning circuit is configured to eliminate thermal noise interference when the heating unit is working.

8. The dynamically adjustable animal surgical experimental operating table according to claim 5, characterized in that: The tension sensor is a strain gauge sensor or a piezoelectric sensor, which is fixed to the fixed end of the pull wire by a rigid connector, and the axis of the rigid connector is coaxial with the pulling direction of the pull wire. The output end of the tension sensor is electrically connected to the control unit through a signal conditioning circuit. The signal conditioning circuit includes an amplification module, a low-pass filter module, and an analog-to-digital conversion module for converting the tension signal into a digital signal. The control unit is configured as: The pull line tension is calculated in real time according to the amplitude of the digital signal, and when the tension exceeds the preset safety threshold, the pull line length adjustment shaft is driven to rotate in the opposite direction to release the tension; When the tension exceeds the threshold value for a period longer than a preset time, the sound and light alarm module is triggered to prompt the operator to intervene.

9. The dynamically adjustable animal surgical experimental operating table according to claim 7, characterized in that: Thermal noise interference cancellation in signal conditioning circuits is achieved by: The platen's zoned thermal isolation structure includes: a physical separation of ≥8mm between the heating zone and the sensing zone; a high-thermal-conductivity aluminum plate with a thermal conductivity of 200-230W / m·K is placed under the heating zone; and a polyimide insulation layer with a thermal conductivity of 0.1-0.2W / m·K is placed under the sensing zone. The noise feature library pre-stored in the control unit contains the thermal noise spectrum data of the heating unit at different power levels; The digital signal processing module is configured to: collect the frequency domain components of the respiratory signal in real time and perform pattern matching with the noise feature library; and dynamically filter out the successfully matched noise frequency band of 50-200Hz by using a digital notch filter; Before the experimental animals were placed, the baseline noise of the heating module was recorded when it was running at full power, and the baseline noise component was subtracted from the respiratory signal in real time during the experiment; The control unit is also configured to automatically reduce the power of the heating module and trigger an alarm when the temperature of the sensing area exceeds a preset threshold.

10. The dynamically adjustable animal surgical experimental operating table according to claim 7, characterized in that: The signal conditioning circuit includes: A differential amplifier module, whose input end is connected to at least two groups of symmetrically arranged piezoelectric sensors, for generating a differential breathing signal that cancels out environmental noise; A switchable bandpass filter bank with passbands preset to 1-4 Hz for rodent mode and 0.5-2 Hz for lagomorph mode, receiving species selection instructions via a mechanical band switch or wireless communication module; Dynamic baseline calibration module, which automatically collects 10-30 seconds of background noise in the apnea state before the experiment begins and generates a noise template. During the experiment, the time domain component of the template is subtracted from the respiratory signal in real time at a frequency of once per second; The control unit is configured to automatically adjust the attenuation slope of the bandpass filter group according to the amplitude fluctuation of the differential respiratory signal to ensure that the attenuation of the respiratory main frequency signal is ≤3dB; when the signal baseline drift exceeds the preset threshold, the sensor contact pressure adjustment mechanism is triggered to recalibrate the fit between the piezoelectric sensor and the animal's body surface.

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