Single connecting line heat seal clamp circuit for transmitting multiple control signals and key trigger control method

Abstract

The invention provides a single connecting line heat sealing clamp circuit used for transmitting various control signals, comprising a single radio frequency connecting line used for simultaneously transmitting a power signal existing in an alternating current form and n control signals existing in a direct current form; the single radio frequency connecting line is connected with the signal isolation unit, and the signal isolation unit is used for isolating the influence of a direct current signal and an alternating current signal; the signal isolation unit is respectively connected with the power signal input end, the power signal output end, the control signal triggering unit and the control signal receiving unit; the control signal receiving unit is connected with the signal processing unit, the signal processing unit is used for judging a triggered control signal and controlling transmission of the power signal, and the invention further provides a key trigger control method. According to the invention, the complexity of the system is reduced, and the space and cost are saved; and meanwhile, the transmission stability of the power signal and the control signal is improved, and the use flexibility is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat-sealing clamp circuit design, and in particular to a single-connection-line heat-sealing clamp circuit and a key trigger control method. Background Art

[0002] Traditional heat-sealing clamp circuits typically require multiple cables to transmit power and control signals separately. This design not only increases system complexity, but also requires additional space and costs. Especially when multiple control signals need to be transmitted, traditional designs often require more cables and interfaces, further increasing system complexity and maintenance difficulties. Furthermore, the use of multiple cables can lead to signal interference, compromising system stability and reliability. To address these issues, some existing designs have attempted to transmit both power and control signals via a single cable. However, high-frequency power signals can easily generate electromagnetic radiation during transmission, causing crosstalk with adjacent DC control signals, leading to control signal distortion, false triggering, or transmission delays, compromising the control accuracy and stability of the heat-sealing clamp. Existing methods rely solely on the physical shielding of a single cable, resulting in incomplete signal isolation and inaccurate control signal transmission. Adding or modifying control signals requires rerouting cables, replacing interfaces, and even adjusting the overall circuit architecture. This lacks flexibility and makes it difficult to adapt to diverse application scenarios, resulting in poor performance in real-world applications. Summary of the Invention

[0003] In response to the technical problems of multi-line complexity, signal interference, and inflexible control in existing heat-sealing clamp circuits, the present invention proposes a single-connection-line heat-sealing clamp circuit and a key-triggered control method for transmitting multiple control signals, which reduces the complexity of the system, saves space and cost; at the same time, it increases the stability of power signal and control signal transmission, and increases flexibility of use.

[0004] In order to achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A single-wire heat-sealing clamp circuit for transmitting multiple control signals includes a single radio frequency (RF) wire for simultaneously transmitting a power signal in the form of an alternating current (AC) and n types of control signals in the form of a direct current (DC). The RF wire is connected to a signal isolation unit, which is used to isolate the influence of the DC signal and the AC signal. The signal isolation unit is respectively connected to a power signal input terminal, a power signal output terminal, a control signal triggering unit, and a control signal receiving unit. The control signal receiving unit is connected to a signal processing unit, which is used to determine the triggered control signal and control the transmission of the power signal.

[0006] Specifically, the signal isolation unit includes a control signal isolation unit and a power signal isolation unit connected to each other, the control signal isolation unit is respectively connected to the power signal input end, the power signal output end and a single RF connection line; the power signal isolation unit is respectively connected to the control signal trigger unit, the control signal receiving unit and a single RF connection line.

[0007] Specifically, the control signal isolation unit includes a capacitor C n+1 and capacitor C n+2 , the capacitor C n+1 One end is connected to the power signal input end, capacitor C n+1 The other end is connected to the input end of the single RF connection line; the capacitor C n+2 One end is connected to the power signal output end, capacitor C n+2 The other end is connected to the output end of the single RF connection line; capacitor C n+1 The other end and capacitor C n+2 The other ends are connected to the power signal isolation unit.

[0008] Specifically, the power signal isolation unit includes a first LC filter circuit and a second LC filter circuit, the first LC filter circuit is connected to the input end of the single RF connection line, the capacitor C n+1 The other end is connected to the control signal receiving unit; the second LC filter circuit is respectively connected to the output end of the single RF connection line, the capacitor C n+2 The other end is connected to the control signal trigger unit.

[0009] Specifically, the inductor L in the first LC filter circuit n+1 One end is connected to the capacitor C n+1 The other end is connected to the input end of the single RF connection line, and the inductor L n+1 The other end is connected to the control signal receiving unit, capacitor C n+3 One end is connected to the inductor L n+1 The other end is connected to the control signal receiving unit, capacitor C n+3 The other end is grounded; the inductor L in the second LC filter circuit n+2 One end is connected to the capacitor C n+2 The other end is connected to the output end of the single RF connection line, and the inductor L n+2 The other end is connected to the control signal trigger unit, capacitor C n+4 One end is connected to the inductor L n+2 The other end is connected to the control signal trigger unit, capacitor C n+4 The other end is grounded.

[0010] Specifically, the control signal trigger unit includes a plurality of voltage-dividing resistors and a plurality of buttons, one end of each voltage-dividing resistor is connected to one end of the corresponding button, and the other end of each voltage-dividing resistor is respectively connected to the capacitor C n+4 One end and the inductor L n+2 The other end of each button is connected to ground.

[0011] Specifically, the control signal receiving unit includes a DC voltage source and a reference resistor. The negative electrode of the DC voltage source is grounded, and the positive electrode of the DC voltage source is connected to one end of the reference resistor, and a point A is formed at the other end of the reference resistor. Point A is respectively connected to the inductor L n+1 The other end and the capacitor C n+3 One end is connected.

[0012] Specifically, the signal processing unit includes multiple groups of signal processing circuits and a control chip, one end of the multiple groups of signal processing circuits is connected to the point A, and the other end of the multiple groups of signal processing circuits is connected to the control chip.

[0013] Specifically, each group of the signal processing circuit includes a voltage comparator, a third LC filter circuit and an LED lamp, one input end of the voltage comparator is connected to point A, the other input end of the voltage comparator is connected to a preset voltage value, the output end of the voltage comparator is connected to one end of the inductor in the third LC filter circuit, one end of the inductor and one end of the capacitor in the third LC filter circuit are both connected to the anode end of the LED lamp, and the cathode end of the LED lamp is connected to the control chip through a port.

[0014] A key trigger control method includes the following steps:

[0015] The detection method is as follows: S1: Initial port status detection: Real-time monitoring of the status of port P1. If it is detected that P1 changes from high to low, it will immediately enter the delay verification phase and delay 2T1. The level of the next port will be judged. If it is also low, it will be delayed for a corresponding time difference until the next port P is detected. i If the level is high, it will go to the next step; otherwise it will be considered as an invalid action;

[0016] S2: End port status detection: At this time, theoretically port P i+1 ~P n Should still be high level, detect port P i+1 Is it high level? If yes, then the next port P i+2 Detect until P is detected n Port, if port P i+1 ~P n If both are high level, proceed to the next step; otherwise it is considered as an invalid action;

[0017] S3: Initial port status re-detection: the last low level port P i-1 Test again and check port P i-1 Is it low level? If yes, delay 2T i-1 , then port P i-1 If it is a low level, it will continue to detect the previous port after a delay, and the ports P1 to P i-1 If both are low level and the status of each port is stable, it is determined to be a valid action. i-1 Indicates the time difference between adjacent ports.

[0018] Beneficial effects of the present invention:

[0019] Single cable transmits multiple signals: Power signals and multiple control signals are transmitted simultaneously through a single RF cable, reducing the number of cables and simplifying the system hardware design; reducing system complexity, saving space and cost.

[0020] Precise control signal transmission: Through the design of voltage comparators and control chips, the trigger status of different control signals can be accurately detected, supporting precise voltage feature identification and timing fault tolerance.

[0021] Effective signal isolation: The use of components such as capacitors and inductors effectively isolates power signals from control signals. Capacitors isolate DC signals from the power signal, while inductors isolate AC signals from interfering with the control signal. This ensures that power and control signals do not interfere with each other during transmission, improving system stability and reliability.

[0022] A combination of software and hardware improves system reliability: A control chip with integrated software enables precise control of the start and stop of the power signal. The design also stops power transmission when the button is released, further improving system safety and meeting user needs in different scenarios.

[0023] Flexible control method: Through an expandable resistor network and multi-channel voltage comparison and transmission circuits, it supports independent encoding of n types of control signals. Each button trigger corresponds to a unique voltage characteristic value, realizing the transmission of multiple control signals. The control chip can accurately identify and execute complex control logic. Only the resistance value and preset voltage comparison threshold need to be adjusted, without changing the hardware architecture, and has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 This is a structural diagram of Example 2 of the present invention.

[0027] Figure 3 This is a structural diagram of Example 3 of the present invention.

[0028] Figure 4 It is a simplified schematic diagram of the control signal transmission of the present invention.

[0029] Figure 5 This is an oscilloscope observation result diagram in Example 3 of the present invention. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] A single-wire heat-sealing clamp circuit for transmitting multiple control signals, such as Figure 1 As shown, it includes a single RF connecting line for simultaneously transmitting a power signal in the form of AC and n control signals in the form of DC. The power signal and multiple control signals are transmitted simultaneously through a single RF connecting line, which reduces the number of connecting lines, simplifies the system design, reduces the cost and space occupancy, and improves the integration and reliability of the system; the single RF connecting line is connected to the signal isolation unit, and the signal isolation unit is used to isolate the influence of DC signals and AC signals; the signal isolation unit is respectively connected to the power signal input terminal, the power signal output terminal, the control signal trigger unit and the control signal receiving unit; the control signal receiving unit is connected to the signal processing unit, and the signal processing unit is used to determine the triggered control signal and control the transmission of the power signal.

[0033] The signal isolation unit includes a control signal isolation unit and a power signal isolation unit. The control signal isolation unit is used to isolate the influence of the DC signal on the power signal and only allow the AC signal to pass through. The power signal isolation unit is used to isolate the AC signal from interfering with the control signal and allow the DC signal to pass through, ensuring the pure transmission of the DC control signal. The control signal isolation unit is respectively connected to the power signal input terminal, the power signal output terminal, and a single RF connection line; the power signal isolation unit is respectively connected to the control signal trigger unit, the control signal receiving unit, and a single RF connection line.

[0034] The control signal isolation unit includes a capacitor C n+1 and capacitor C n+2 , the capacitor C n+1 One end is connected to the power signal input end, capacitor C n+1 The other end is connected to the input end of the single RF connection line to isolate the influence of the DC signal on the power signal input end and only allow the AC signal to pass through; the capacitor C n+2 One end is connected to the power signal output end, capacitor C n+2 The other end is connected to the output end of the single RF connection line to isolate the DC signal from reaching the load and allow the AC power signal to be transmitted to the load; the capacitor C n+1 The other end and capacitor C n+2 The other ends are connected to the power signal isolation unit.

[0035] The power signal isolation unit includes a first LC filter circuit and a second LC filter circuit, the first LC filter circuit is connected to the input end of the single RF connection line, the capacitor C n+2 The other end is connected to the control signal receiving unit; the second LC filter circuit is respectively connected to the output end of the single RF connection line, the capacitor C n+2 The other end is connected to the control signal trigger unit.

[0036] The inductor L in the first LC filter circuit n+1 One end is connected to the capacitor C n+1 The other end is connected to the input end of the single RF connection line, and the inductor L n+1 The other end is connected to the control signal receiving unit, capacitor C n+3 One end is connected to the inductor L n+1 The other end is connected to the control signal receiving unit, capacitor C n+3 The other end is grounded to isolate the influence of the power signal at the power signal input end on the received control signal; the inductor L in the second LC filter circuit n+2 One end is connected to the capacitor C n+2 The other end is connected to the output end of the single RF connection line, and the inductor Ln+2 The other end is connected to the control signal trigger unit, capacitor C n+4 One end is connected to the inductor L n+2 The other end is connected to the control signal trigger unit, capacitor C n+4 The other end is grounded to isolate the influence of the power signal at the power signal output end on the triggered control signal.

[0037] The control signal trigger unit includes a plurality of voltage dividing resistors R1 to R n and a plurality of buttons 1 to n, one end of each voltage divider resistor is connected to one end of the corresponding button, and the other end of each voltage divider resistor is respectively connected to the capacitor C n+4 One end and the inductor L n+2 The other end of each button is connected to ground.

[0038] The control signal receiving unit includes a DC voltage source and a reference resistor. The negative electrode of the DC voltage source is grounded, and the positive electrode of the DC voltage source is connected to one end of the reference resistor and forms a point A at the other end of the reference resistor. Point A is respectively connected to the inductor L n+1 The other end and the capacitor C n+3 One end is connected.

[0039] When using, such as Figure 4 As shown, when different buttons are pressed, resistors R1 to R n A single RF cable forms a loop with reference resistor R0, changing the voltage at point A. The signal processing unit then determines the triggering control signal based on the voltage at point A. This resistor combination allows the system to support a variety of control signals, allowing users to flexibly select the control method to meet the needs of different application scenarios.

[0040] The signal processing unit includes multiple groups of signal processing circuits and a control chip. One end of the multiple groups of signal processing circuits is connected to the point A, and the other end of the multiple groups of signal processing circuits is connected to the control chip.

[0041] Each group of the signal processing circuit includes a voltage comparator, a third LC filter circuit, and an LED lamp. One end of the voltage comparator input is connected to point A, and the other end of the input is connected to a preset voltage value. The output end of the voltage comparator is connected to one end of the inductor in the third LC filter circuit. One end of the inductor and one end of the capacitor in the third LC filter circuit are both connected to the anode end of the LED lamp, and the anode end of the LED lamp is connected to the control chip through a port.

[0042] The signal processing unit includes a control chip and a multi-channel voltage comparison and transmission circuit; the multi-channel voltage comparison and transmission circuit includes voltage comparators COMP1 to COMPn, one end of the input end of the voltage comparators COMP1 to COMPn is connected to the point A, and the other end of the input end of the voltage comparators COMP1 to COMPn is respectively connected to the corresponding preset voltage values V1 to Vn. The output ends of the voltage comparators COMP1 to COMPn are respectively connected to the inductors L1 to L n One end is connected to the inductor L1~L n The other end is connected to capacitors C1~C n One end is connected to the anode of LED1~LEDn, and the capacitors C1~C n The other ends are grounded, and the cathodes of LED1 to LEDn are connected to the corresponding ports P1 to P2 of the control chip. n Corresponding connection.

[0043] When in use, the voltage comparators COMP1~COMPn compare the voltage at point A with the preset voltage values V1~Vn, and output different level signals. The LED light indicates the transmission status of the power signal. The user can quickly judge the working status of the system, which improves the usability of the system. Through the status changes of the LED light, the user can quickly troubleshoot system faults, which improves the maintainability of the system; the control chip judges the status of the control signal by detecting the level signal, and accurately determines which control signal is triggered. According to the triggering situation of the control signal, the control chip can accurately control the start, stop and size adjustment of the power signal to ensure stable operation of the system.

[0044] Example 2

[0045] A single-wire heat-sealing clamp circuit for transmitting multiple control signals, such as Figure 2 As shown, the signal processing unit includes a control chip and a multi-channel voltage comparison and transmission circuit; the multi-channel voltage comparison and transmission circuit includes voltage comparators COMP1-COMP3, one end of the input terminals of the voltage comparators COMP1-COMP3 are connected to the said point A, and the other end of the input terminals of the voltage comparators COMP1-COMP3 are respectively connected to the corresponding preset voltage values V1-V3. The output terminals of the voltage comparators COMP1-COMP3 are respectively connected to one end of the inductors L1-L3, the other end of the inductors L1-L2 are respectively connected to one end of the capacitors C1-C3 and the anodes of LEDs 1-LED3, the other end of the capacitors C1-C3 are respectively connected to ground, and the cathodes of LEDs 1-LED3 are respectively connected to the corresponding ports P1-P3 of the control chip.

[0046] Parameter design:

[0047] The DC power supply is 5V, R0=5KΩ, R1=3KΩ, R2=5KΩ, R3=7KΩ, V1=2.7V, V2=2.2V, V3=1.5V,

[0048] When button 1 is pressed, the voltage at point A will become 1.9V. At this time, the values of the preset voltage V1 and the preset voltage V2 are greater than 1.9V, so both the P1 port and the P2 port output a low level, while the P3 port outputs a high level, and LED3 will light up.

[0049] When button 2 is pressed, the voltage at point A will become 2.5V. At this time, the value of V1 is greater than 2.5V, so the P1 port outputs a low level, while the P2 and P3 ports both output a high level, and LED2 and LED3 will light up.

[0050] When button 3 is pressed, the voltage at point A will become 3V. At this time, the preset voltage values are all less than 3V, so all ports output high levels, and LED1, LED2, and LED3 will light up.

[0051] The other structures are the same as those in Example 1.

[0052] Example 3

[0053] A single-wire heat-sealing clamp circuit for transmitting multiple control signals, such as Figure 3 As shown, the signal processing unit includes a control chip and a multi-channel voltage comparison and transmission circuit; the multi-channel voltage comparison and transmission circuit includes voltage comparators COMP1-COMP2, one end of each of the voltage comparators COMP1-COMP2 input terminals is connected to point A, and the other end of each of the voltage comparators COMP1-COMP2 input terminals is respectively connected to corresponding preset voltage values V1-V2. The output terminals of the voltage comparators COMP1-COMP2 are respectively connected to one end of inductors L1-L2, the other end of inductors L1-L2 is respectively connected to one end of capacitors C1-C2 and the anodes of LEDs 1-LED3, the other end of capacitors C1-C2 is respectively connected to ground, and the cathodes of LEDs 1-LED2 are respectively connected to the corresponding ports P1-P2 of the control chip.

[0054] The operating principle is as follows: The clamp mechanism utilizes a split-body design, consisting of an upper dynamic clamping module and a lower static base, forming an integrated linkage system. A limit switch (limit sensor) is integrated into the base's positioning datum surface, with its trigger end aligned axially with the clamping module's motion trajectory. As the clamping module descends, its guide mechanism continuously applies a preset pressure after contacting the workpiece. When the displacement reaches a specified amount, the trigger boss on the bottom of the clamping module precisely contacts the limit switch actuator. As the clamp mechanism clamps the plastic tube, button 1 is triggered, transmitting the power start control signal and initiating power transmission. Once the plastic tube melts to the desired degree, the limit switch is triggered, allowing button 2 to be pressed, transmitting the power stop control signal and stopping power transmission. The instant the button is pressed, the voltage at point A, the right end of reference resistor R0, changes. This voltage is compared with the preset voltages V1 and V2, and then transmitted to the port as a high or low level signal. The control chip can determine which control signal is triggered by distinguishing the high and low level values of different ports, thereby achieving effective transmission of the control signal and realizing power signal control.

[0055] In this embodiment, the experimental setup includes a voltage source that can stably output 0-24V. The control chip is a single-chip microcomputer (STC89C52), using a voltage comparator (LM358). The input power is a 40.68Hz sine wave with a peak voltage of 12V. The reference resistor R0 is 5kΩ, the resistor R1 is 10kΩ, and the resistor R2 is 3.4kΩ. The DC voltage source is set to 5V, the preset voltage V1 is set to 4V, and the preset voltage V2 is set to 2.7V. Capacitors C1 and C2 are both 50nF capacitors, capacitors C3 and C4 are both 2nF capacitors, capacitors C5 and C6 are both 50nF capacitors, inductors L1 and L2 are both 220L magnetic beads, and inductors L3 and L4 are both 66.696901nH inductors. Two LED lights are connected to the ports, and the control state of the power signal is determined by observing the on and off of the two lights.

[0056] In the circuit design, pressing button 1 means starting the transmission of the power signal, and pressing button 2 means stopping the transmission of the power signal. Assuming that the port connected to button 1 is P1 and the port connected to button 2 is P2, the on and off of two LEDs are used to simulate whether the power is transmitted. When the LED is high, it is in the lit state, the power starts and begins to transmit, and when the LED is low, it is in the off state, the power stops and the transmission is disconnected. When button 1 is pressed, the P1 port will be set to a low level, and the system will start to work for a period of time, at which time LED2 will light up. When button 2 is pressed, both the P1 port and the P2 port will be set to a low level, the system will stop working, and LED1 and LED2 will be in the off state. During the design process, this embodiment uses an oscilloscope to observe the changes in the port levels when different buttons are pressed and released. In order to facilitate the design of software code, such as Figure 5 As shown, the oscilloscope shows that when button 1 is pressed and released, the voltage levels at ports P1 and P2 change as designed. That is, when button 1 is pressed, port P1 goes low, while port P2 remains high. However, when button 2 is pressed, the voltage at port P1 jumps to a low level first, and only after a specific time difference of T1 = 1.020ms does the voltage at port P2 jump to a low level. When button 2 is pressed, port P1 jumps to a low level first, followed by port P2. If the voltage levels at both ports P1 and P2 are used to determine the power amplifier's power on condition, the amplifier's transmission cannot be stopped. When button 2 is released, port P2 jumps to a high level first, followed by port P1. Therefore, at the moment button 2 is released, if the voltage levels at both ports P1 and P2 are used to determine the power amplifier's power on condition, the amplifier will be restarted. This is due to timing errors caused by hardware and wiring. Based on this phenomenon, the programming concept proposed in this embodiment is as follows:

[0057] 1. Check whether the P1 port becomes low. If so, perform the delay operation immediately. The delay time is set to twice the time difference, that is, 2.040ms. At this time, the port P2 should still be at a high level in theory; otherwise, it is considered invalid.

[0058] 2. Check whether the P2 port is in a high level state. If so, delay again, indicating that the timing is in line with expectations (P1 changes low first, and port P2 has not yet changed low). The delay length is set to twice the time difference, which is exactly the time point when port P2 should jump. Otherwise, it is considered invalid.

[0059] 3. Check again whether the P1 port is still at a low level. If it is, it means that the button is pressed stably. Otherwise, it means that the button was released within a short time after being pressed, which is considered an invalid action.

[0060] A valid button press is considered to be performed only when the following conditions are met: port P1 becomes low → port P2 remains high after a delay of 2T → port P1 remains low after another delay of 2T. The state truth table is shown in Table 1.

[0061] According to the above experimental settings, the PCB board was designed and soldered to connect it to the clamp device before conducting the experiment.

[0062] Table 1

[0063]

[0064] Experiment 1: Press button 1 to trigger the experiment:

[0065] Experimental operation: Accurately trigger button 1 on the clamp device to simulate the power transfer start operation in actual application.

[0066] Experimental Observation: After button 1 is triggered, the voltage at point A quickly rises to approximately 3.4V. At this point, the voltage at point A is compared with the preset voltages V1 and V2. Because the preset voltage V1 is set to 4V, which is greater than the 3.4V voltage at point A, port P1 outputs a low-level signal, according to the operating principle of the LM358 voltage comparator. However, the preset voltage V2 is set to 2.7V, which is less than the voltage at point A, causing port P2 to output a high-level signal.

[0067] Analysis: This experimental result is highly consistent with the program logic previously written and burned into the STC89C52 microcontroller. LED2 lights up, indicating that power has been successfully transferred to the clamp.

[0068] Experiment 2: Button 2 triggers the experiment:

[0069] Experimental operation: Trigger button 2 on the clamp device to simulate the operation scenario of stopping power transmission.

[0070] Experimental results: After button 2 is triggered, the voltage at point A drops to approximately 2V. The voltage at point A is compared again with the preset voltages V1 and V2. The preset voltage V1 (4V) is greater than the 2V voltage at point A, so port P1 outputs a low level. V2 (2.7V) is also greater than the voltage at point A, so port P2 outputs a low level.

[0071] Result Analysis: This result is completely consistent with the pre-designed power transmission shutdown procedure. Both LED1 and LED2 are off, clearly indicating that power transmission has stopped. This further verifies the effectiveness of the system in controlling power transmission shutdown and ensures that in practical applications, power transmission can be accurately cut off, ensuring system safety and stability.

[0072] Experiment 3: Sequential triggering of button 1 and button 2:

[0073] Experimental operation: First trigger button 1 on the clamp device. After the power starts to be transmitted stably, trigger button 2 to simulate the complex operation of frequently starting and stopping power transmission in actual applications.

[0074] Experimental findings: During this process, the inevitable delay difference between the two op amps resulted in a time difference between the port voltage changes. To address this issue, a high-precision oscilloscope was first used to accurately measure the time difference between the port voltage changes after the switch was triggered. Through multiple measurements and data analysis, accurate time difference values were obtained. Based on this data, a targeted program was then designed to test the power level of port P1 three times when detecting power transmission. After this series of optimizations, the final experimental results were as follows: When button 1 was first pressed, LED 2 illuminated and LED 1 was off, indicating normal power transmission. Then, when button 2 was pressed, LED 2 immediately turned off, LED 1 was also off, and power transmission quickly ceased.

[0075] Result analysis: By detecting the time difference of voltage change and optimizing the program, precise control of power transmission was successfully achieved, which fully met the design requirements.

[0076] Experiment 4: Release button 1 to stop power transmission:

[0077] Experimental Procedure: To further improve system functionality and ensure ease of use and safety, we designed the system to stop power transmission when Button 1 is pressed and then released. In the code that stops power transmission, we added logic to ensure that power transmission is also stopped when port P1 is low. After burning the modified code into the STC89C52 microcontroller, press Button 1 and observe the LED status change.

[0078] Experimental phenomenon: After pressing button 1, LED2 lights up, LED1 is off, and power transmission starts; after releasing button 1, LED2 goes out immediately, LED1 is off, and power transmission stops.

[0079] Results Analysis: This experimental result demonstrates that the code optimization successfully achieved the intended functionality. In practical applications, this design enables more flexible control of power transmission, improves system usability and safety, and meets user needs in different scenarios.

[0080] The other structures are the same as those in Example 1.

[0081] Example 4

[0082] A key trigger control method, as described in steps S1 to S3.

[0083] In the n-way voltage comparison and transmission circuit, according to the design idea of the present invention, when button 1 is pressed, the P1 port will become a low level, when button 2 is pressed, the P1 port and the P2 port will become a low level, and so on. When button n is pressed, the P1 port, the P2 port, and the P2 port will become low levels. nIf the port level changes to a low level, regardless of the hardware design's impact on the port signal, simply observing the changes in the high and low levels of each port can determine which key was pressed, allowing for precise control of the power signal. If the designed circuit's hardware causes inconsistent port level transitions, an oscilloscope can be used to observe the time difference between the level transitions. A delay function can then be added to the program that detects port level changes.

[0084] Assume that the initial state of n ports is high level. By setting the appropriate comparison voltage, when the key is pressed, the rule of port level change is P1→P2→…→P n The order of ports changes in turn (or the order of ports changes can be defined according to the specific scenario, here we take the order of decreasing as an example), and the power transmission situation can be judged by simply observing the on and off status of the LED lights connected to them.

[0085] When the port levels cannot change simultaneously due to time differences caused by hardware problems, first use an oscilloscope to monitor the time differences to understand the relationship between the level changes of each port. i Each port is larger than P i-1 When the time difference between two adjacent ports changes, assuming that the time difference between two adjacent ports is T i , the following detection methods can be used.

[0086] The detection method is as follows: S1: Initial port status detection: Real-time monitoring of the status of port P1. If it is detected that P1 changes from high to low, it will immediately enter the delay verification phase and delay 2T1. The level of the next port will be judged. If it is also low, it will be delayed for a corresponding time difference until the next port P is detected. i If the level is high, the next step is entered; otherwise, it is considered as an invalid action (such as interference or false triggering).

[0087] S2: End port status detection: At this time, theoretically port P i+1 ~P n Should still be high level (not yet low time point), detect port P i+1 Is it a high level? If yes, then the next port P i+2 Detect until P is detected n Port, if port P i+1 ~P n If both are high level, proceed to the next step; otherwise it is considered as an invalid action;

[0088] S3: Initial port status re-detection: the last low level port P i-1 Test again and check port P i-1 Is it low level? If yes, delay 2T i-1, then port P i-1 If it is a low level, it will continue to detect the previous port after a delay, and the ports P1 to P i-1 If all are low level and the status of each port is stable (does not rebound in a short time), it is determined to be a valid action.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A single-wire heat-sealing clamp circuit for transmitting multiple control signals, characterized in that: It includes a single RF connection line for simultaneously transmitting a power signal in the form of AC and n types of control signals in the form of DC; the single RF connection line is connected to a signal isolation unit, which is used to isolate the influence of DC signals and AC signals; the signal isolation unit is respectively connected to a power signal input terminal, a power signal output terminal, a control signal triggering unit and a control signal receiving unit; the control signal receiving unit is connected to a signal processing unit, which is used to determine the triggered control signal and control the transmission of the power signal.

2. The single-wire heat-sealing clamp circuit for transmitting multiple control signals according to claim 1, characterized in that: The signal isolation unit includes a control signal isolation unit and a power signal isolation unit connected to each other. The control signal isolation unit is respectively connected to the power signal input end, the power signal output end and a single RF connection line; the power signal isolation unit is respectively connected to the control signal trigger unit, the control signal receiving unit and a single RF connection line.

3. The single-wire heat-sealing clamp circuit for transmitting multiple control signals according to claim 2, characterized in that: The control signal isolation unit includes a capacitor C n+1 and capacitor C n+2 , the capacitor C n+1 One end is connected to the power signal input end, capacitor C n+1 The other end is connected to the input end of the single RF connection line; the capacitor C n+2 One end is connected to the power signal output end, capacitor C n+2 The other end is connected to the output end of the single RF connection line; capacitor C n+1 The other end and capacitor C n+2 The other ends are connected to the power signal isolation unit.

4. The single-wire heat-sealing clamp circuit for transmitting multiple control signals according to claim 2 or 3, characterized in that: The power signal isolation unit includes a first LC filter circuit and a second LC filter circuit, the first LC filter circuit is connected to the input end of the single RF connection line, the capacitor C n+1 The other end is connected to the control signal receiving unit; The second LC filter circuit is respectively connected to the output end of the single RF connection line, the capacitor C n+2 The other end is connected to the control signal trigger unit.

5. The single-wire heat-sealing clamp circuit for transmitting multiple control signals according to claim 4, characterized in that: The inductor L in the first LC filter circuit n+1 One end is connected to the capacitor C n+1 The other end is connected to the input end of the single RF connection line, and the inductor L n+1 The other end is connected to the control signal receiving unit, capacitor C n+3 One end is connected to the inductor L n+1 The other end is connected to the control signal receiving unit, capacitor C n+3 The other end is grounded; the inductor L in the second LC filter circuit n+2 One end is connected to the capacitor C n+2 The other end is connected to the output end of the single RF connection line, and the inductor L n+2 The other end is connected to the control signal trigger unit, capacitor C n+4 One end is connected to the inductor L n+2 The other end is connected to the control signal trigger unit, capacitor C n+4 The other end is grounded.

6. The single-wire heat-sealing clamp circuit for transmitting multiple control signals according to claim 5, characterized in that: The control signal trigger unit includes a plurality of voltage-dividing resistors and a plurality of buttons, one end of each voltage-dividing resistor is connected to one end of the corresponding button, and the other end of each voltage-dividing resistor is connected to the capacitor C n+4 One end and the inductor L n+2 The other end of each button is connected to ground.

7. The single-wire heat-sealing clamp circuit for transmitting multiple control signals according to claim 5 or 6, characterized in that: The control signal receiving unit includes a DC voltage source and a reference resistor. The negative electrode of the DC voltage source is grounded, and the positive electrode of the DC voltage source is connected to one end of the reference resistor, and a point A is formed at the other end of the reference resistor. Point A is respectively connected to the inductor L n+1 The other end and the capacitor C n+3 One end is connected.

8. The single-wire heat-sealing clamp circuit for transmitting multiple control signals according to claim 7, characterized in that: The signal processing unit includes multiple groups of signal processing circuits and a control chip. One end of the multiple groups of signal processing circuits is connected to the point A, and the other end of the multiple groups of signal processing circuits is connected to the control chip.

9. The single-wire heat-sealing clamp circuit for transmitting multiple control signals according to claim 8, characterized in that: Each group of the signal processing circuit includes a voltage comparator, a third LC filter circuit and an LED lamp. One input end of the voltage comparator is connected to point A, the other input end of the voltage comparator is connected to a preset voltage value, the output end of the voltage comparator is connected to one end of the inductor in the third LC filter circuit, one end of the inductor and one end of the capacitor in the third LC filter circuit are both connected to the anode end of the LED lamp, and the cathode end of the LED lamp is connected to the control chip through a port.

10. A key trigger control method, used for the single-wire heat-sealing clamp circuit for transmitting multiple control signals according to any one of claims 1 to 9, characterized in that: Including steps: S1: Initial port status detection: Real-time monitoring of the status of port P1. If it is detected that P1 changes from high to low, it will immediately enter the delay verification phase and delay 2T1. The level of the next port will be judged. If it is also low, it will be delayed for a corresponding time difference until the next port P is detected. i If the level is high, it will go to the next step; otherwise it will be considered as an invalid action; S2: End port status detection: At this time, theoretically port P i+1 ~P n Should still be high level, detect port P i+1 Is it high level? If yes, then the next port P i+2 Detect until P is detected n Port, if port P i+1 ~P n If both are high level, proceed to the next step; otherwise it is considered as an invalid action; S3: Initial port status re-detection: the last low level port P i-1 Test again and check port P i-1 Is it low level? If yes, delay 2T i-1 , then port P i-1 If it is a low level, it will continue to detect the previous port after a delay, and the ports P1 to P i-1 If both are low level and the status of each port is stable, it is determined to be a valid action. i-1 Indicates the time difference between adjacent ports.

Images