Anti-misoperation travel switch circuit and special vehicle

Abstract

The utility model discloses a kind of travel switch circuit and special vehicle of anti-misoperation, belong to anti-misoperation circuit technical field.The circuit includes first control module and second control module, each module is equipped with power supply, power switch, action unit, travel switch and alarm unit.Action unit is connected with power supply through the normally closed contact of travel switch, and alarm unit is connected with power supply through normally open contact.First action unit triggers second travel switch state switching when working, and second action unit triggers first travel switch state switching when working, realizes interlock control.When misoperation occurs, travel switch cuts off action unit power supply and connects alarm unit, triggers audible light alarm to prompt correct operation step.The utility model adopts travel switch and audible light alarm combination, simple structure, low in cost, high reliability, equipment damage caused by misoperation can be effectively avoided.

Description

Technical Field

[0001] This document relates to the field of anti-misoperation circuit technology, and in particular to a limit switch circuit for preventing misoperation and its application in special vehicles. Background Technology

[0002] Existing technologies mostly use PLCs to implement interlock control, feedback control, fault-safe control, stability control, fault-tolerant control, timing control, operating range control, resource allocation control, fault diagnosis and recovery control, and other rules. PLC control technology can overcome the problems of poor flexibility, high power consumption, and low reliability in previous control technologies, while making full use of microprocessors.

[0003] PLC control technology can achieve high-performance mechanical equipment control. However, in simple control logic schemes, the initial installation cost of PLC control technology is relatively high, and its reliability in extreme environments is insufficient. For example, in special vehicles equipped with both a movable roof and a movable antenna, due to limited roof space, the movement ranges of the roof and antenna partially overlap. Existing technology uses PLC control to achieve interlocking control to prevent collisions between the roof and antenna. However, PLC controllers are expensive and have performance redundancy. Existing solutions lack real-time monitoring and remote feedback mechanisms for limit switch status, and cannot provide multi-dimensional operation guidance and fault warnings under complex operating conditions. Utility Model Content

[0004] This manual provides a limit switch circuit and a special vehicle for preventing misoperation. It uses a combination of limit switches and audible and visual alarms to effectively avoid equipment damage caused by misoperation.

[0005] This utility model embodiment provides a limit switch circuit for preventing mis-sequential operation, including: First control module and second control module; The first control module includes a first power supply, a first power switch, a first actuation unit, a first limit switch, and a first alarm unit; the first power switch is connected to the output terminal of the first power supply; the first actuation unit is connected to the first power switch through the normally closed contact of the first limit switch, and the first alarm unit is connected to the first power switch through the normally open contact of the first limit switch. The second control module includes a second power supply, a second power switch, a second action unit, a second limit switch, and a second alarm unit; the second power switch is connected to the output terminal of the second power supply; the second action unit is connected to the second power switch through the normally closed contact of the second limit switch, and the second alarm unit is connected to the second power switch through the normally open contact of the second limit switch. When the first actuating unit is connected to the first power switch, it causes the state of the second limit switch to switch; when the second actuating unit is connected to the second power switch, it causes the state of the first limit switch to switch. A wireless communication module is provided between the first control module and the second control module to transmit limit switch status information to the vehicle central controller in real time, and to display a correction prompt on the vehicle display screen in case of misoperation.

[0006] This utility model embodiment provides a special vehicle, characterized in that the special vehicle is equipped with the aforementioned limit switch circuit for preventing misoperation on its roof.

[0007] This invention achieves mutual control between two control modules by switching the action unit of one module with the limit switch action of another. When an incorrect operation occurs, the corresponding action unit is disconnected from the power supply while the alarm unit is connected, preventing the incorrect operation from happening and issuing an alarm notification to reduce losses caused by equipment malfunction. Real-time acquisition of parameters such as the angle and displacement of the limit switches, combined with wireless communication, enables remote status monitoring. The three-dimensional obstacle avoidance system and the limit switch interlocking mechanism form dual protection. Furthermore, this invention does not require a control chip, resulting in lower cost and higher reliability. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in one or more embodiments of this specification or in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the limit switch circuit for preventing mis-sequence operation in Embodiment 1; Figure 2 This is a roof plan view of the special vehicle in Example 2; Figure 3 This is the original circuit diagram of the special vehicle roof in Example 2; Figure 4 Circuit diagram for adding a limit switch and alarm unit to the roof of the special vehicle in Embodiment 2; Figure 5 This is the original circuit diagram of the special vehicle antenna in Example 2; Figure 6 This is a circuit diagram of the addition of a limit switch and an alarm unit to the special vehicle antenna in Embodiment 2. Detailed Implementation

[0010] To enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this document.

[0011] Example 1 According to an embodiment of this utility model, a limit switch circuit for preventing mis-sequential operation is provided. Figure 1 As shown, the limit switch circuit for preventing mis-sequence operation in this embodiment of the present invention specifically includes: a first control module and a second control module; The first control module includes a first power supply, a first power switch, a first actuation unit, a first limit switch, and a first alarm unit; the first power switch is connected to the output terminal of the first power supply; the first actuation unit is connected to the first power switch through the normally closed contact of the first limit switch, and the first alarm unit is connected to the first power switch through the normally open contact of the first limit switch. The second control module includes a second power supply, a second power switch, a second action unit, a second limit switch, and a second alarm unit; the second power switch is connected to the output terminal of the second power supply; the second action unit is connected to the second power switch through the normally closed contact of the second limit switch, and the second alarm unit is connected to the second power switch through the normally open contact of the second limit switch. When the first actuating unit is connected to the first power switch, it causes the state of the second limit switch to switch; when the second actuating unit is connected to the second power switch, it causes the state of the first limit switch to switch. A wireless communication module is provided between the first control module and the second control module to transmit limit switch status information to the vehicle central controller in real time, and to display a correction prompt on the vehicle display screen in case of misoperation.

[0012] The first limit switch is a roller-type limit switch, and the second limit switch is a direct-acting limit switch. The roller-type limit switch is further provided with an angle sensor to detect the rotation angle of the roller and feed it back to the control system. The push rod of the direct-acting limit switch has a built-in displacement sensor to monitor the push rod's travel position in real time. The contacts of the first and second limit switches are both normally open to normally closed changeover contacts.

[0013] Both the first alarm unit and the second alarm unit include an audible and visual alarm, which includes an alarm light and a speaker. The alarm light is an LED light and the speaker is a piezoelectric buzzer. The audible and visual alarm also integrates a vibration feedback module to generate a tactile warning when an alarm is triggered.

[0014] The driving voltage of the audible and visual alarm is 9-30V, the output power is 5W, the alarm sound is 100dB, and the protection level is IP65. The first limit switch and the second limit switch have a rated voltage of 500V, a rated current of 3A, and a protection rating of IP67.

[0015] Both the first power supply and the second power supply are 24V DC power supplies, and both are equipped with overcurrent protection circuits and short-circuit protection circuits. The first power supply and the second power supply also integrate temperature sensors, which automatically cut off the power output when the temperature exceeds 60°C.

[0016] The first action unit is a top cover drive motor, and the second action unit is an antenna drive motor.

[0017] When the first actuation unit (top cover drive motor) starts, it drives the push rod of the second limit switch to move via a mechanical linkage, triggering the normally closed contact of the second limit switch to open and the normally open contact to close. If the operator accidentally touches the second power switch at this time, the second actuation unit (antenna drive motor) cannot be energized because the normally closed contact is open. At the same time, the second alarm unit is energized through the normally open contact and issues a voice alarm saying "Please close the top cover first." The vibration module simultaneously generates 100Hz tactile feedback. The wireless communication module transmits the status parameters of the second limit switch (such as the push rod displacement of 12mm) to the vehicle central controller in real time, which is displayed on the screen as a dynamic progress bar to help the operator judge the equipment status.

[0018] In this embodiment of the invention, the action unit of one control module switches the limit switch of another control module, thereby achieving mutual control between the two control modules. When an incorrect operation occurs, the corresponding action unit is disconnected from the power supply while the alarm unit is connected to the power supply, preventing the incorrect operation from occurring and issuing an alarm notification through the alarm unit. Real-time acquisition of parameters such as the angle and displacement of the limit switch, combined with wireless communication, enables remote status monitoring.

[0019] Example 2 According to an embodiment of this utility model, a special vehicle is provided, characterized in that the special vehicle's roof is equipped with the aforementioned limit switch circuit for preventing mis-sequential operation, thereby controlling the sequential operation of the vehicle's roof cover and antenna. For example... Figure 2 The image shown is a roof plan view of the special vehicle in Embodiment 2. Figure 2As shown, a special vehicle needs to simultaneously open its roof and place an antenna. The antenna in its flat position and the roof in its open position are in the same location. However, due to limited roof space, their range of motion overlaps in some areas, as shown in the figure. In the closed state, the roof is located in area A, and the antenna is located in the semi-circular dotted area. To open it for use, the antenna must first be erected along its axis before opening the roof; otherwise, the roof and antenna will collide in area B. The retraction process is the same: the roof must be closed first, and then the antenna laid flat along its axis; otherwise, a collision will also occur.

[0020] The above problem can be solved by using the limit switch circuit described above to prevent mis-sequence operation, such as... Figure 3 This is the original circuit diagram of the special vehicle roof in Example 2. Figure 5 The original circuit diagram of the special vehicle antenna in Embodiment 2 is shown below. After introducing a limit switch circuit to prevent mis-sequence operation, Figure 4 The circuit diagram for adding a limit switch and alarm unit to the roof of the special vehicle in Embodiment 2. Figure 6 This is a circuit diagram of the special vehicle antenna with added limit switches and alarm units according to Embodiment 2. By introducing a limit switch circuit to prevent mis-sequence operation, the antenna is driven to stand upright and lie flat by a second actuation unit, and the top cover is opened and closed by a first actuation unit for translation control. The first actuation unit is connected to the first power switch through the normally closed contact of the first limit switch, and the first alarm unit is connected to the first power switch through the normally open contact of the first limit switch. The second actuation unit is connected to the second power supply through the normally closed contact of the first limit switch, and the second alarm unit is connected to the second power supply through the normally open contact of the second limit switch.

[0021] Driven by the second action unit, the antenna is erected, causing the normally closed contact of the first limit switch to close and the normally open contact of the first limit switch to open; when the antenna is laid flat, the normally closed contact of the first limit switch is opened and the normally open contact of the first limit switch is closed; when the top cover is open, the normally closed contact of the second limit switch is opened and the normally open contact of the second limit switch is closed; when the top cover is closed, the normally closed contact of the second limit switch is closed and the normally open contact of the second limit switch is open.

[0022] Specifically, the operator controls the opening and closing of the top cover via the first power switch, and controls the erection and lateral placement of the antenna via the second power switch. Since the antenna in the lateral position and the top cover in the open position are in the same location, when the top cover needs to be opened from the closed position, the antenna must first be erected; otherwise, the antenna may be damaged during the opening process. When the erected antenna needs to be laid lateral, the top cover must be closed first to avoid damage to the antenna when the top cover is closed later.

[0023] In this embodiment, the first alarm module and the second alarm module each include an alarm light. The first alarm module and the second alarm module each activate a speaker. Preferably, the first alarm unit and the second unit are audible and visual alarms. The alarm state is characterized by a flashing red light and an alarm voice. The alarm voice of the first alarm unit is "Please raise the antenna first, then open the top cover," and the alarm voice of the second alarm unit is "Please close the top cover first, then lay the antenna flat." Specifically, the audible and visual alarm is cylindrical, with a diameter of 75cm and a height of 49cm, a driving voltage of 9~30V, an output power of 5W, an alarm sound of 100dB, and an IP65 protection rating.

[0024] In this embodiment, the first limit switch is a roller-type limit switch. The second limit switch is a direct-acting limit switch. Both the first and second limit switches are 13cm long, 4cm wide, and 6cm high, with a rated voltage of 500V, a rated current of 3A, and an IP67 protection rating.

[0025] In this embodiment, the first power supply and the second power supply are 24V DC power supplies.

[0026] Working principle: When the operator presses the first power switch to open the top cover; if the antenna is in a flat position, the normally open contact of the second limit switch is closed and the normally closed contact is open, the first action unit does not work, and the first alarm unit sends an alarm signal; if the antenna is in an upright position, the normally open contact of the first limit switch is open and the normally closed contact is closed, the first action unit works to open the top cover, and the first alarm unit does not work. When the operator presses the second power switch to control the antenna to lie flat; if the top cover is in the open state, the normally open contact of the second limit switch is closed and the normally closed contact is open, the second action unit does not work, and the second alarm unit issues an alarm signal; if the top cover is in the closed state, the normally open contact of the second limit switch is open and the normally closed contact is closed, the second action unit causes the antenna to lie flat, and the second alarm unit does not work.

[0027] Furthermore, this embodiment of the special vehicle also includes limit switch bases, which are fixed to the upper side of the vehicle's roof. The first limit switch and the second limit switch are respectively fixed to the upper sides of the two limit switch bases. In this embodiment, the height of the limit switch base is 5cm, used to protect the limit switches and prevent damage from rainwater stored on the roof.

[0028] By installing the aforementioned antenna deployment and retraction device, special vehicles can effectively avoid damage to the roof antenna due to misoperation. This method is low-cost and highly reliable, reducing economic losses. At the same time, it can alert operators through audible and visual alarms, allowing them to learn the correct operating procedures.

[0029] Furthermore, the roof is equipped with a three-dimensional scanning obstacle avoidance system, which can monitor the movement trajectory of the roof and antenna in real time and trigger a protection mechanism in advance when a collision risk is predicted.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A trip switch circuit for preventing an erroneous operation, characterized by comprising: It includes a first control module and a second control module; The first control module includes a first power supply, a first power switch, a first actuation unit, a first limit switch, and a first alarm unit; the first power switch is connected to the output terminal of the first power supply; the first actuation unit is connected to the first power switch through the normally closed contact of the first limit switch, and the first alarm unit is connected to the first power switch through the normally open contact of the first limit switch. The second control module includes a second power supply, a second power switch, a second action unit, a second limit switch, and a second alarm unit; the second power switch is connected to the output terminal of the second power supply; the second action unit is connected to the second power switch through the normally closed contact of the second limit switch, and the second alarm unit is connected to the second power switch through the normally open contact of the second limit switch. When the first actuating unit is connected to the first power switch, it causes the state of the second limit switch to switch; when the second actuating unit is connected to the second power switch, it causes the state of the first limit switch to switch. A wireless communication module is provided between the first control module and the second control module to transmit limit switch status information to the vehicle central controller in real time, and to display a correction prompt on the vehicle display screen in case of misoperation.

2. The travel switch circuit according to claim 1, characterized by The first limit switch is a roller-type limit switch, and the second limit switch is a direct-acting limit switch. The roller-type limit switch is further provided with an angle sensor to detect the rotation angle of the roller and feed it back to the control system. The push rod of the direct-acting limit switch has a built-in displacement sensor to monitor the push rod's stroke position in real time.

3. The travel switch circuit of claim 1, wherein Both the first alarm unit and the second alarm unit include an audible and visual alarm, which includes an alarm light and a speaker. The alarm light is an LED light and the speaker is a piezoelectric buzzer. The audible and visual alarm also integrates a vibration feedback module to generate a tactile warning when an alarm is triggered.

4. The travel switch circuit of claim 3, wherein The driving voltage of the audible and visual alarm is 9-30V, the output power is 5W, the alarm sound is 100dB, and the protection level is IP65.

5. The travel switch circuit of claim 1, wherein The first limit switch and the second limit switch have a rated voltage of 500V, a rated current of 3A, and a protection rating of IP67.

6. The travel switch circuit of claim 1, wherein Both the first power supply and the second power supply are 24V DC power supplies, and both are equipped with overcurrent protection circuits and short-circuit protection circuits. The first power supply and the second power supply also integrate temperature sensors, which automatically cut off the power output when the temperature exceeds 60°C.

7. The travel switch circuit of claim 1, wherein The first action unit is a top cover drive motor, and the second action unit is an antenna drive motor.

8. The travel switch circuit of claim 1, wherein, The contacts of both the first limit switch and the second limit switch are normally open to normally closed changeover contacts.

9. A special vehicle, characterized by The special vehicle is equipped with a limit switch circuit for preventing misoperation as described in any one of claims 1-8 on its roof to control the sequential operation of the vehicle roof and antenna; the roof is equipped with a three-dimensional scanning obstacle avoidance system that can monitor the movement trajectory of the roof and antenna in real time and trigger a protection mechanism in advance when a collision risk is predicted.

10. The special service vehicle of claim 9, wherein, The travel switch base is fixed to the top side of the special vehicle, and the first travel switch and the second travel switch are respectively fixed to the upper sides of the two travel switch bases.

Images