A method for measuring kinematic parameters based on a double-gate photogate

Abstract

This invention discloses a method for measuring the kinematic parameters of a dual-gate photoelectric sensor, relating to the field of photoelectric sensor measurement technology. The method includes providing a dual-channel photoelectric sensor main unit and accessories, and charging the main unit. Depending on the type of object to be measured and the measurement requirements, the main unit can be mounted on the motion path of the object using a bracket, or mounted by aligning a laser pointer with the laser receiver of the main unit, or by cascading two main units via cables, or by assembling a turntable assembly onto the main unit, or by attaching a grating strip to the surface of the object. This invention utilizes a non-contact measurement technique with a built-in laser receiver in the dual-channel photoelectric sensor main unit and a laser pointer, enabling the measurement of the velocity of large, irregularly shaped objects that cannot pass through the frame of the dual-channel photoelectric sensor. This overcomes the limitations of traditional photoelectric sensor experiments, which rely on light-blocking plates and require the object to pass through the sensor frame.

Description

Technical Field

[0001] This invention relates to the field of photoelectric gate measurement technology, and specifically to a method for measuring the kinematic parameters of a dual-gate photoelectric gate. Background Technology

[0002] Photogates are commonly used instruments in high school physics experiments to measure the instantaneous velocity of objects. Their basic principle is to approximate the instantaneous velocity of an object by using the average velocity over a displacement as it passes through the photogate, thereby measuring kinematic parameters such as acceleration. Existing kinematic measurement schemes based on photogates mainly have the following shortcomings: First, there are strict limitations on the shape and movement of the object. Existing photogate schemes require the object being measured to be able to install a light-blocking plate and pass through the photogate frame. For objects that are large, irregularly shaped, or for which a light-blocking plate cannot be installed, traditional photogates cannot achieve effective measurement, thus limiting their experimental applicability.

[0003] Secondly, the data acquisition and processing methods are outdated. In traditional solutions, photogates typically require connection to external devices such as digital millisecond meters or general-purpose computer counters. Experimental data must be recorded manually and calculated tediously, resulting in low efficiency and a high risk of introducing gross errors. When multiple photogates are used in combination, it is difficult to accurately synchronize the time reference. Summary of the Invention

[0004] The purpose of this invention is to provide a method for measuring kinematic parameters based on a dual-gate photoelectric gate, so as to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for measuring kinematic parameters based on a dual-door photoelectric gate, comprising the following steps: S1. Provide a dual-channel photoelectric gate host and accessories, and charge the dual-channel photoelectric gate host; S2. Depending on the type of the object to be measured and the measurement requirements, the dual-channel photoelectric gate host is installed on the movement path of the object to be measured by means of a bracket, or the laser pointer is aligned with the laser receiver tube of the dual-channel photoelectric gate host and then installed, or two dual-channel photoelectric gate hosts are cascaded by cables, or the turntable assembly is assembled on the dual-channel photoelectric gate host, or the grating strip is attached to the surface of the object to be measured. S3. Establish a communication connection between the dual-channel photoelectric gate host and the host computer via Bluetooth wireless or USB wired connection, or start the stand-alone working mode of the dual-channel photoelectric gate host. S4. Select the desired measurement mode and configure the corresponding measurement parameters according to the selected mode; S5. Start data acquisition, so that the object to be measured moves along a preset path to trigger the detection signal of the dual-channel photoelectric gate host. The dual-channel photoelectric gate host records and processes the detection signal to obtain the measurement result. S6. Display the measurement results on the screen of the dual-channel photoelectric gate host or the software interface of the host computer, and store or export the measurement results.

[0006] Furthermore, S2 includes the following steps: The dual-path photoelectric gate host is installed on the movement path via a triangular bracket and an L-shaped fixed bracket, and is fixed with screws; The laser pointer is mounted on the triangular bracket after being held by a conventional clamp. The triangular bracket and the conventional clamp are adjusted so that the laser beam of the laser pointer is aligned with the laser receiver tube until the laser illumination indicator light goes out. The two dual-channel photoelectric gate hosts are connected via a network cable through a cascading interface to achieve time base synchronization; The turntable assembly is assembled with the dual-channel photoelectric gate host via a snap-fit ​​connector. The turntable assembly includes a pulley and a snap-fit ​​connector, with one half of the snap-fit ​​connector mounted on the dual-channel photoelectric gate host and the other half mounted on the pulley. The grating strip is attached to the surface of the object along the direction of motion of the object being measured.

[0007] Furthermore, in S3, the Bluetooth wireless method includes: pressing and holding the middle button on the dual-channel photoelectric gate host for 3 seconds to power on, the Bluetooth indicator light flashes twice three times and then flashes red at a frequency of once every 2 seconds, so that the dual-channel photoelectric gate host enters the Bluetooth broadcast state, the supporting software is started on the host computer and the device list is scanned, the corresponding sensor ID is clicked to connect, and after the connection is successful, the Bluetooth indicator light switches to flashing green. The USB wired method includes: connecting the Type-C data cable to the charging port of the dual-channel photoelectric gate host and the host computer, starting the supporting software to automatically identify the device and establish a connection, and turning off the Bluetooth indicator light when the USB connection is active; The stand-alone working mode includes: after pressing and holding the middle button for 3 seconds to turn on the machine, it can be operated directly through the screen and buttons of the dual-channel photoelectric gate host without connecting to a host computer.

[0008] Furthermore, in step S4, the measurement mode is selected in one of the following ways: In the software interface, click to select the target mode; Alternatively, menu items can be switched by clicking the left or right button in the on-screen menu of the dual-path photoelectric gate host, or the selection can be confirmed by clicking the middle button; The measurement modes include speed measurement mode, photogate counting mode, acceleration measurement mode, distance measurement mode, laser timing mode, and laser timing mode. The acceleration measurement mode selects the cascading method when two photogates need to be cascaded.

[0009] Furthermore, the feature is that S5 includes the following steps: When the measurement mode is the speed measurement mode, the object to be measured is made to pass through the detection area of ​​the dual-channel photoelectric gate host, or the external rotating component drives the pulley to rotate in the turntable installation state, or the object to be measured blocks the laser beam emitted by the laser pen. The dual-channel photoelectric gate host records the passing time or the blocking pulse and calculates the speed value. When the measurement mode is acceleration measurement mode, the object to be measured passes through two cascaded photogates in sequence. The dual-channel photogate host records two instantaneous velocities and the time interval and calculates the acceleration according to the acceleration formula. When the measurement mode is photoelectric gate counting mode or laser timing mode, the object to be measured is made to pass through the detection area repeatedly or block the laser beam in sequence. The dual-channel photoelectric gate host accumulates the number of times and determines the direction of motion according to the timing of the dual-channel signal. When the measurement mode is laser timing mode, the object under test blocks the laser beam to trigger the start and end of timing, and the dual-channel photoelectric gate host records the duration of the blockage.

[0010] Furthermore, S6 includes: In stand-alone mode, the measurement results are displayed on the color screen of the dual-channel photoelectric gate host. The screen supports gravity sensing. When the device tilts at an angle exceeding a preset threshold, the screen display direction is automatically rotated to keep the screen data facing the user. In Bluetooth or USB mode, the measurement results are transmitted in real time and displayed on the software interface of the host computer, with the status bar displaying a "Acquiring..." message. The measurement results are stored internally in the device or exported as a spreadsheet or text format via the software interface.

[0011] Furthermore, it also includes the correspondence between the screen display content of modes one through six: Mode 1 is the speed measurement mode, which displays the speed and its unit on the screen; Mode 2 is the photoelectric gate counting mode, and the number of times is displayed on the screen; Mode 3 is the acceleration measurement mode, which displays the acceleration and its unit on the screen; Mode 4 is the distance measurement mode, which displays the distance and its unit on the screen; Mode 5 is the laser timing mode, and the number of times is displayed on the screen; Mode 6 is the laser timing mode, which displays the time and its unit on the screen; The measurement results for each mode are displayed in a combination of numbers and units in the central area of ​​the screen.

[0012] Compared with existing technologies, the present invention provides a kinematic parameter measurement method based on a dual-gate photoelectric gate. By using a laser receiver tube built into the dual-gate host and a laser pen for non-contact measurement, it realizes the velocity measurement of objects that are large in size, irregular in shape, and cannot pass through the gate frame. This overcomes the limitations of traditional photoelectric gate experiments, which must rely on light-blocking plates and require objects to pass through the gate frame, and expands the applicable scope of kinematic measurement.

[0013] By using a network cable to cascade two dual-channel photogate main units to achieve time reference synchronization, the consistency of the timing starting point when the two photogates participate in the same motion measurement is achieved, avoiding the time synchronization error caused by independent timing in traditional multi-photogate schemes. By using two photogates to measure the velocity at two points and then calculating the acceleration based on the acceleration, accurate measurement of the acceleration of uniformly accelerated motion under arbitrary initial velocity conditions is achieved, overcoming the limitation that the built-in screen reading mode is only applicable to the case of zero initial velocity.

[0014] By employing Bluetooth connectivity to enable wireless communication between the device and the host computer (with a communication distance of ≥30m in open, unobstructed areas) and by using a Type-C interface for wired USB connection, a flexible experimental environment with both wireless and wired modes is created. This reduces the complexity of wiring between devices, allows data to be transmitted to the host computer software in real time, and avoids the inefficiencies and gross errors caused by manual recording and calculation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a flowchart illustrating the method steps provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of a dual-channel photoelectric gate structure provided in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Laser receiver tube; 2. Indicator light; 3. Screen; 4. Buttons; 5. Grating strip. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Exemplary embodiments will be described more fully below with reference to the accompanying drawings; however, these exemplary embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.

[0020] Where there is no conflict, the various embodiments of this disclosure and the features thereof in the embodiments may be combined with each other.

[0021] As used herein, the term “and / or” includes any and all combinations of one or more related enumerated entries.

[0022] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. As used herein, the singular forms “a” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It will also be understood that when the terms “comprising” and / or “made of” are used in this specification, the presence of the said feature, integral, step, operation, element, and / or component is specified, but the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof is not excluded.

[0023] The embodiments described herein can be described with reference to plan views and / or cross-sectional views using the ideal schematic diagrams of this disclosure. Therefore, the example illustrations can be modified according to manufacturing techniques and / or tolerances. Therefore, the embodiments are not limited to those shown in the drawings, but include modifications to configurations formed based on manufacturing processes. Therefore, the areas illustrated in the drawings are schematic in nature, and the shapes of the areas shown in the figures illustrate specific shapes of areas of an element, but are not intended to be limiting.

[0024] Unless otherwise specified, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having the same meaning as they have in the context of the relevant art and this disclosure.

[0025] Please see Figures 1-2 A method for measuring kinematic parameters based on a dual-door photoelectric gate, comprising the following steps: S1. Provide dual-channel photoelectric gate host and accessories, and charge the dual-channel photoelectric gate host.

[0026] Before taking measurements, remove one dual-channel photoelectric gate main unit from the equipment packaging and check that the following accessories are complete: one cable (specifically a network cable), one Type-C data cable, several black Torx screws, one laser pointer, one L-shaped fixing bracket, one grating strip, one pair of card slots (including two half-pieces), one pulley, one tripod bracket, and one standard fixing clamp. Confirm that all accessories are complete and undamaged.

[0027] Upon first use of the device, perform the following steps: Insert the Type-C connector of the Type-C data cable into the charging port of the dual-channel photoelectric gate host, and connect the other end to a USB power adapter with a rated output voltage of 5V, a computer USB port, or a power bank. The power indicator light will be solid red while the device is charging. Continue charging for at least two hours. The battery is fully charged when the power indicator light changes from solid red to solid green.

[0028] S2. Depending on the type of object to be measured and the measurement requirements, the dual-channel photoelectric gate host can be mounted on the movement path of the object using a bracket, or mounted after aligning a laser pointer with the laser receiver of the dual-channel photoelectric gate host, or two dual-channel photoelectric gate hosts can be cascaded via cables, or a turntable assembly can be mounted on the dual-channel photoelectric gate host, or a grating strip can be attached to the surface of the object to be measured. Specifically: (1) Dual-channel photoelectric gate host is installed independently: Align the threaded hole at the bottom of the dual-channel photoelectric gate main unit with the fixing bolt at the top of the tripod bracket, and tighten the connection. Adjust the opening angle of the tripod bracket's legs and the height of the telescopic rod to align the detection area of ​​the dual-channel photoelectric gate main unit with the movement path of the object being measured. If the direction of the dual-channel photoelectric gate main unit needs adjustment, connect the main unit to the tripod bracket using an L-shaped fixing bracket: fix one end of the L-shaped fixing bracket to the threaded hole on the back of the dual-channel photoelectric gate main unit using a black Torx screw, and fix the other end to the top of the tripod bracket.

[0029] (2) Laser pointer installation (suitable for large objects that cannot pass through the frame of the dual-path photoelectric gate): Secure the laser pointer using a standard clamp, then attach the clamp to the top of the tripod. Adjust the height of the tripod and the angle of the clamp to align the laser beam emitted by the laser pointer with the laser receiver built into the dual-channel photoelectric gate main unit. Adjust until the laser illumination indicator light changes from solid red to off, indicating that the laser beam is aligned with the laser receiver.

[0030] (3) Dual-channel photoelectric gate host cascade installation (cable cascade installation): When two dual-channel photoelectric gate hosts need to participate in the measurement of the same movement, take a cable (specifically a network cable) and insert both ends of the cable into the cascading interface of the two dual-channel photoelectric gate hosts respectively to ensure that the time reference of the two devices is consistent.

[0031] (4) Assembly of turntable components: The turntable assembly consists of a pulley and a mounting bracket, suitable for measuring both rotational speed and distance. One half of the mounting bracket is installed in the corresponding slot on the dual-channel photoelectric gate main unit, and the other half is installed in the center mounting hole of the pulley. The pulley is then assembled and connected to the dual-channel photoelectric gate main unit via the mounting bracket. The connection between the pulley and the external rotating component is as follows: the pulley's groove is used to embed a drive belt or thin wire; the movement of the external rotating component is transmitted to the pulley via the belt or wire, causing the pulley to rotate.

[0032] (5) Installation of grating strip: The grating strip is attached to the surface of the object along the direction of motion of the object being measured, ensuring that the length direction of the grating strip is consistent with the direction of motion.

[0033] S3. Establish a communication connection between the dual-channel photoelectric gate host and the host computer via Bluetooth wireless or USB wired connection, or start the stand-alone working mode of the dual-channel photoelectric gate host.

[0034] Press and hold the middle button on the dual-channel photoelectric gate host for 3 seconds to power on the device. After powering on, the Bluetooth indicator light will flash twice three times, then flash red once every 2 seconds, indicating that the device has entered Bluetooth broadcast mode and is waiting for the host computer to connect. If the device screen powers on normally and displays the initial interface, it indicates that the power-on was successful.

[0035] Depending on the experimental environment and the type of host computer, choose one of the following two connection methods, or directly start the stand-alone working mode: (1) Bluetooth wireless method: Launch the accompanying software on a host computer or smart terminal with Bluetooth receiving capability. After the software is launched, it will automatically scan for dual-channel photoelectric gate hosts in broadcast mode and display all scanned sensor IDs in the device list on the software interface.

[0036] In the software device list, click the sensor ID corresponding to this device to connect. After successful connection, the Bluetooth indicator light on the dual-channel photoelectric gate host will change from flashing red to flashing green, and the software interface status bar will display a connection success message.

[0037] Once the connection is successful, you can perform subsequent measurement parameter settings and data acquisition operations in the software interface.

[0038] (2) USB wired mode: Insert the Type-C connector of the Type-C data cable into the charging port of the dual-channel photoelectric gate host, and insert the other end of the data cable into the corresponding USB port of the host computer.

[0039] After the host computer recognizes the new hardware device, it starts the accompanying software.

[0040] The accompanying software automatically recognizes devices that have been connected via USB, eliminating the need to manually select the sensor ID. Once the connection is established, subsequent operations can be performed.

[0041] (3) Standalone working mode: After pressing and holding the middle button for 3 seconds to power on, you can operate the device directly through its built-in screen and buttons, without needing to connect to a host computer. Click the left or right button to bring up the main menu on the device screen, and use the buttons to select modes and perform measurement operations.

[0042] S4. Select the desired measurement mode and configure the corresponding measurement parameters according to the selected mode.

[0043] Depending on the physical quantity to be measured and the purpose of the experiment, the measurement mode can be selected using one of the following two methods: (1) Select via the accompanying software (applicable to Bluetooth wireless or USB wired methods): In the software's interface, select the target measurement mode from the drop-down menu or mode selection panel. Supported modes include: speed measurement mode, photoelectric gate counting mode, acceleration measurement mode, distance measurement mode, laser timing mode, and laser timing mode. After selection, the parameter configuration area of ​​the software interface will simultaneously display the adjustable measurement parameters corresponding to the current mode.

[0044] (2) Select via the device's built-in screen and buttons (applicable to standalone working mode): After pressing and holding the middle button for 3 seconds to power on, click the left or right button to bring up the main menu on the device screen.

[0045] By repeatedly clicking the left mouse button (to switch menu items up) or the right mouse button (to switch menu items down), the highlight bar on the screen will cycle through the menu items until it stops on the target mode item.

[0046] Click the middle button to confirm the selection. The device screen will switch to the measurement data display interface for the selected mode. The correspondence between modes and the corresponding screen display content is shown in the table below:

[0047] When connected via the accompanying software, configure the corresponding measurement parameters according to the selected mode: (1) Measurement parameter configuration in speed measurement mode: Choose the speed calculation method: measure speed through a door (no requirements on object shape, no light shield needed); convert speed to turntable rotation speed (turntable assembly must be installed), if this method is selected, the radius value of the turntable assembly must be entered; measure speed of large objects by laser occlusion (laser pointer must be installed and aligned), if this method is selected, the occlusion width value of the measured object in the direction of movement must be entered.

[0048] (2) Measurement parameter configuration in acceleration measurement mode: Select acceleration calculation method: software mode, calculate acceleration by measuring the velocity at two points measured by two dual-channel photoelectric gate hosts; (3) Measurement parameter configuration in distance measurement mode: Confirm that the turntable assembly is correctly installed on the dual-channel photoelectric gate host, and enter the reference radius of the turntable assembly or the distance value corresponding to each revolution.

[0049] Confirm that the grating tape has been correctly attached to the surface of the object being measured, and enter the grid spacing value of the grating tape as needed (see the grating tape body markings for specific values).

[0050] (4) Measurement parameter configuration in photoelectric gate counting mode: Choose the counting trigger method: Door-triggered counting (can detect the direction of object movement); Laser-triggered counting (requires the laser pointer to be installed and aligned).

[0051] (5) Laser timing mode and measurement parameter configuration under laser timing mode: Confirm that the laser pointer is correctly installed and the laser beam is aligned with the laser receiver (laser illumination indicator light is off). In laser timing mode, confirm that the start and end of the timing are triggered when the laser beam is blocked.

[0052] S5. Start data acquisition, so that the object to be measured moves along the preset path to trigger the detection signal of the dual-channel photoelectric gate host. The dual-channel photoelectric gate host records and processes the detection signal to obtain the measurement result.

[0053] Based on the selected communication method, execute the corresponding data acquisition start operation: (1) Data acquisition startup via Bluetooth wireless or USB wired mode: Click the "Start Data Acquisition" button in the accompanying software interface. The status bar of the software interface will display a "Acquiring..." message, indicating that the device is sampling data. At the same time, the dual-channel photoelectric gate host screen will simultaneously display the "Acquiring..." information in the status bar.

[0054] (2) Data acquisition startup in stand-alone working mode: With the dual-channel photoelectric gate host screen in the measurement data display interface state, click the middle button to start data acquisition, and click the middle button again to stop data acquisition.

[0055] The object to be measured is moved along a preset path to trigger the detection signal of the dual-channel photoelectric gate host. The dual-channel photoelectric gate host records and processes the detection signal to obtain the measurement result, and executes the corresponding triggering operation according to the selected measurement mode: (1) Triggering operation for speed measurement mode: Speed ​​measurement via gate: The object to be measured passes through the detection area of ​​the dual-channel photoelectric gate host along a straight path. When the object enters the detection area, the dual-channel photoelectric gate host automatically detects and records the time of passage, calculates and displays the speed value. The speed is displayed in the center area of ​​the screen, and the unit is displayed synchronously with the numerical value.

[0056] Turntable rotation speed conversion: This starts the external rotating component, causing the turntable assembly's pulleys to rotate. The pulley rotation generates light-blocking pulses, and the dual-channel photoelectric gate host calculates the linear velocity based on the number of light-blocking pulses per unit time and the input radius value.

[0057] Laser occlusion measurement of large object speed: The large object to be measured is moved along the direction of the laser beam, blocking the laser beam. The laser illumination indicator light is originally off (the laser pointer is already aligned with the laser receiver). When the object blocks the laser, the detection signal of the laser receiver is interrupted. The dual-channel photoelectric gate host records the start and end times of the occlusion and calculates the speed by combining it with the input object occlusion width.

[0058] (2) Triggering operation for acceleration measurement mode: Software mode: The object to be measured starts moving from the position of the first dual-channel photoelectric gate host and passes through two cascaded dual-channel photoelectric gate hosts in sequence. The dual-channel photoelectric gate hosts record the instantaneous velocities v1 and v2 of the object when passing through the two dual-channel photoelectric gate hosts, as well as the time interval Δt between the two points. The acceleration is calculated according to the formula a=(v2-v1) / Δt.

[0059] Built-in screen reading mode: The object under test passes through two cascaded dual-channel photoelectric gate main units under uniformly accelerated linear motion conditions. The dual-channel photoelectric gate main units calculate the acceleration value according to the uniform acceleration motion formula and display it on the screen.

[0060] (3) Triggering operation of distance measurement mode: The external rotating component rotates continuously, driving the pulley of the turntable assembly to rotate. The dual-channel photoelectric gate host records the number of rotations (counted by light-blocking pulses), combines this with the pulley radius, calculates the total distance, and displays it on the screen.

[0061] An object with a grating strip attached is guided to pass through the detection area of ​​a dual-channel photogate host in a straight line. The dual-channel photogate host collects a series of detection signals (specifically pulse signals) generated as the grating strip passes through, recording the time point of each grating's passage. The user performs kinematic calculations based on the raw data: given the grating spacing, the average velocity of the displacement segment can be calculated from the time interval between two adjacent pulses; the acceleration can be further calculated from the average velocity of two adjacent displacement segments and their corresponding midpoint time interval.

[0062] (4) Triggering operation of photoelectric gate counting mode: Gate pass-through counting: This function involves passing the object through the detection area of ​​a dual-channel photoelectric gate host. The dual-channel photoelectric gate host records the number of passes and determines the object's direction of movement (forward or reverse passage) based on the timing of the detection signals from the two detection channels. The count value is updated in real time and displayed on the screen.

[0063] Laser obstruction counting: The object to be measured passes through the laser beam path sequentially. Each time the object obstructs the laser beam, the detection signal of the laser receiver tube changes from on to off, and the dual-channel photoelectric gate host counts once. The count value is updated in real time and displayed on the screen.

[0064] (5) Triggering operation of laser timing mode: The timing starts when the object under test begins to block the laser beam and ends when the object stops blocking it. The dual-channel photoelectric gate main unit records the duration of laser beam blocking and displays it on the screen in time and units.

[0065] S6. Display the measurement results on the screen of the dual-channel photoelectric gate host or the software interface of the host computer, and store or export the measurement results.

[0066] In standalone mode, measurement results are displayed on the built-in color screen (128×128 pixels, 1.44 inches) of the dual-channel photoelectric gate host. The screen supports gravity sensing; the built-in gravity sensor automatically detects the device's current posture, and when the tilt angle exceeds a preset threshold, it triggers the screen to automatically rotate, ensuring the data is facing the user. In Bluetooth wireless or USB wired mode, measurement results are transmitted in real-time and displayed on the accompanying software interface, with the software status bar displaying a "Acquiring..." message.

[0067] In the connected mode with the accompanying software, measurement data is transmitted and displayed in real time on the software interface. The software supports exporting measurement data in spreadsheet or text format.

[0068] S7. Shut down and maintain the equipment.

[0069] After the measurement is completed, press and hold the middle button on the dual-channel photoelectric gate host for 3 seconds. The device screen will turn off, all indicator lights will turn off, and the device will enter the power-off state.

[0070] When the power indicator light flashes red to indicate low battery, begin charging: Connect the Type-C data cable to the device's charging port and USB power source. The charging indicator light will then be solid red. Once charging is complete (the charging indicator light will change from solid red to solid green), remove the charger and disconnect the charging connection within 4 hours of fully charging.

[0071] If this device is expected to be unused for an extended period (more than three consecutive months), perform the following maintenance: Charge the device approximately every three months, charging until the charging indicator light changes from solid red to solid green each time, to prevent the battery from entering an over-discharged state due to prolonged self-discharge.

[0072] If any of the following abnormalities are observed during measurement, immediately stop using the equipment and disconnect the power: abnormally high temperature of the equipment casing, abnormal screen display, unusual odor, smoke, or any other suspicious phenomena. If an abnormality occurs, contact the equipment supplier for repair. If the measurement results remain inaccurate, also contact the supplier; do not attempt to open the equipment casing for adjustments or repairs without authorization.

[0073] Throughout the implementation of this measurement method, the following risk control requirements must be followed: The equipment should be used in a dry environment, free from corrosive gases or high temperatures, as these conditions will severely reduce the equipment's lifespan.

[0074] Do not disassemble the built-in battery of the device, and do not use sharp objects to penetrate the battery casing.

[0075] Charge the battery promptly when it is low (power indicator light flashes red) to avoid leaving the battery in a low-charge state for an extended period.

[0076] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A method for measuring kinematic parameters based on a dual-door photoelectric gate, characterized in that, Includes the following steps: S1. Provide a dual-channel photoelectric gate host and accessories, and charge the dual-channel photoelectric gate host; S2. Depending on the type of the object to be measured and the measurement requirements, the dual-channel photoelectric gate host is installed on the movement path of the object to be measured by means of a bracket, or the laser pointer is aligned with the laser receiver tube of the dual-channel photoelectric gate host and then installed, or two dual-channel photoelectric gate hosts are cascaded by cables, or the turntable assembly is assembled on the dual-channel photoelectric gate host, or the grating strip is attached to the surface of the object to be measured. S3. Establish a communication connection between the dual-channel photoelectric gate host and the host computer via Bluetooth wireless or USB wired connection, or start the stand-alone working mode of the dual-channel photoelectric gate host. S4. Select the desired measurement mode and configure the corresponding measurement parameters according to the selected mode; S5. Start data acquisition, so that the object to be measured moves along a preset path to trigger the detection signal of the dual-channel photoelectric gate host. The dual-channel photoelectric gate host records and processes the detection signal to obtain the measurement result. S6. Display the measurement results on the screen of the dual-channel photoelectric gate host or the software interface of the host computer, and store or export the measurement results.

2. The method for measuring kinematic parameters based on a dual-door photoelectric gate according to claim 1, characterized in that, S2 includes the following steps: The dual-path photoelectric gate host is installed on the movement path via a triangular bracket and an L-shaped fixed bracket, and is fixed with screws; The laser pointer is mounted on the triangular bracket after being held by a conventional clamp. The triangular bracket and the conventional clamp are adjusted so that the laser beam of the laser pointer is aligned with the laser receiver tube until the laser illumination indicator light goes out. The two dual-channel photoelectric gate hosts are connected via a network cable through a cascading interface to achieve time base synchronization; The turntable assembly is assembled with the dual-channel photoelectric gate host via a snap-fit ​​connector. The turntable assembly includes a pulley and a snap-fit ​​connector, with one half of the snap-fit ​​connector mounted on the dual-channel photoelectric gate host and the other half mounted on the pulley. The grating strip is attached to the surface of the object along the direction of motion of the object being measured.

3. The method for measuring kinematic parameters based on a dual-door photoelectric gate according to claim 1, characterized in that, In S3, the Bluetooth wireless method includes: pressing and holding the middle button on the dual-channel photoelectric gate host for 3 seconds to power on, the Bluetooth indicator light flashes twice three times and then flashes red at a frequency of once every 2 seconds, so that the dual-channel photoelectric gate host enters the Bluetooth broadcast state, the supporting software is started on the host computer and the device list is scanned, the corresponding sensor ID is clicked to connect, and after the connection is successful, the Bluetooth indicator light switches to flashing green. The USB wired method includes: connecting the Type-C data cable to the charging port of the dual-channel photoelectric gate host and the host computer, starting the supporting software to automatically identify the device and establish a connection, and turning off the Bluetooth indicator light when the USB connection is active; The stand-alone working mode includes: after pressing and holding the middle button for 3 seconds to turn on the machine, it can be operated directly through the screen and buttons of the dual-channel photoelectric gate host without connecting to a host computer.

4. The method for measuring kinematic parameters based on a dual-door photoelectric gate according to claim 1, characterized in that, In step S4, the measurement mode is selected in one of the following ways: In the software interface, click to select the target mode; Alternatively, menu items can be switched by clicking the left or right button in the on-screen menu of the dual-path photoelectric gate host, or the selection can be confirmed by clicking the middle button; The measurement modes include speed measurement mode, photogate counting mode, acceleration measurement mode, distance measurement mode, laser timing mode, and laser timing mode. The acceleration measurement mode selects the cascading method when two photogates need to be cascaded.

5. The method for measuring kinematic parameters based on a dual-door photoelectric gate according to claim 1, characterized in that, S5 includes the following steps: When the measurement mode is the speed measurement mode, the object to be measured is made to pass through the detection area of ​​the dual-channel photoelectric gate host, or the external rotating component drives the pulley to rotate in the turntable installation state, or the object to be measured blocks the laser beam emitted by the laser pen. The dual-channel photoelectric gate host records the passing time or the blocking pulse and calculates the speed value. When the measurement mode is acceleration measurement mode, the object to be measured passes through two cascaded photogates in sequence. The dual-channel photogate host records two instantaneous velocities and the time interval and calculates the acceleration according to the acceleration formula. When the measurement mode is photoelectric gate counting mode or laser timing mode, the object to be measured is made to pass through the detection area repeatedly or block the laser beam in sequence. The dual-channel photoelectric gate host accumulates the number of times and determines the direction of motion according to the timing of the dual-channel signal. When the measurement mode is laser timing mode, the object under test blocks the laser beam to trigger the start and end of timing, and the dual-channel photoelectric gate host records the duration of the blockage.

6. The method for measuring kinematic parameters based on a dual-door photoelectric gate according to claim 1, characterized in that, S6 includes: In stand-alone mode, the measurement results are displayed on the color screen of the dual-channel photoelectric gate host. The screen supports gravity sensing. When the device tilts at an angle exceeding a preset threshold, the screen display direction is automatically rotated to keep the screen data facing the user. In Bluetooth or USB mode, the measurement results are transmitted in real time and displayed on the software interface of the host computer, with the status bar displaying a "Acquiring..." message. The measurement results are stored internally in the device or exported as a spreadsheet or text format via the software interface.

7. The method for measuring kinematic parameters based on a dual-door photoelectric gate according to claim 1, characterized in that, It also includes the correspondence between the screen display content of modes one through six: Mode 1 is the speed measurement mode, which displays the speed and its unit on the screen; Mode 2 is the photoelectric gate counting mode, and the number of times is displayed on the screen; Mode 3 is the acceleration measurement mode, which displays the acceleration and its unit on the screen; Mode 4 is the distance measurement mode, which displays the distance and its unit on the screen; Mode 5 is the laser timing mode, and the number of times is displayed on the screen; Mode 6 is the laser timing mode, which displays the time and its unit on the screen; The measurement results for each mode are displayed in a combination of numbers and units in the central area of ​​the screen.

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