Alarm signal processing device and method based on dual-axis level

Abstract

The invention discloses an alarm signal processing device and method based on a dual-axis level, comprising a hydraulic lifting platform, a dual-axis level, a level bead and a PLC controller. The dual-axis level is arranged at the center of the top of the hydraulic lifting platform, and five level beads are arranged, one of which is arranged on the upper surface of the dual-axis level, and the other four level beads are arranged around the top frame of the hydraulic lifting platform. The level bead on the dual-axis level and the four level beads on the hydraulic lifting platform are all in a horizontal state, and the four alarm output terminals of the dual-axis level are connected to the four input terminals of the PLC controller. The invention uses a PLC controller to program the alarm signal of the dual-axis level, eliminate the intermittent jitter of the signal caused by the vibration of the equipment, greatly improve the leveling effect, and also improve the safety of the equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of self-lifting balance control of a hydraulic lifting platform, and in particular relates to an alarm signal processing device and method based on a dual-axis level. Background Art

[0002] Generally, hydraulic lifting platforms have four vertical cylinders and four horizontal cylinders powered by hydraulic pressure. The vertical cylinders are responsible for lifting and lowering, and the horizontal cylinders are responsible for extending the vertical cylinders out of the vehicle body. The vertical cylinders are located at the four corners of the hydraulic lifting platform, similar to the four legs of a bench. When the lifting valves of the hydraulic pump and the vertical cylinders are opened at the same time, the hydraulic lifting platform begins to rise. Since the four vertical cylinders are lifted and lowered at the same time and at the same lifting speed, the lifting height is also the same. When the ground is uneven, the hydraulic lifting platform will also be uneven, that is, tilted, after rising. When it tilts to a certain degree, it is possible to cause the equipment to tip over, causing accidents and serious damage to the equipment, which may result in casualties.

[0003] A dual-axis level is an instrument for measuring the level of equipment. A general dual-axis level has two axes, the X axis and the Y axis, which are further divided into +X semi-axis, -X semi-axis and +Y semi-axis, -Y semi-axis. These four semi-axis correspond to four alarm output terminals. When the X axis tilts (+X semi-axis high and -X semi-axis low or +X semi-axis low and -X semi-axis high), the lower semi-axis immediately sends out an alarm signal, and then the vertical cylinder corresponding to this semi-axis is raised individually according to the alarm signal to make it level, thereby achieving the purpose of leveling. However, due to the vibration of the equipment and the high accuracy of the level, the alarm signal of the level often shakes intermittently, causing false alarms, which will cause the vertical cylinder to rise intermittently, i.e. malfunction, and in severe cases, it will directly cause the equipment to tip over, greatly reducing the leveling effect.

[0004] Another problem faced when using a dual-axis level is the installation problem. To level the equipment, the level must first be installed on the same horizontal plane as the equipment, so that the level can play the best effect. If the level is slightly tilted when installed, the result after leveling control is that the level is on the horizontal plane, but the equipment is tilted. This is because the leveling is controlled by the tilt state of the level. The general level only has an alarm output. During installation, it is unknown whether the level is on the same horizontal plane as the equipment, and the tilt angle cannot be set, so the use effect is difficult to guarantee.

[0005] In the past, when hydraulic lifting platforms were calibrated with a spirit level, due to the high accuracy of the spirit level, the spirit level would be installed tilted. Even a tilt of 0.5 degrees would affect its use.

[0006] The level bead is a very practical instrument for measuring the horizontal state. It is widely used when installing equipment and can be used to measure whether the installed equipment is horizontal. If the level bead is installed on the level meter and the hydraulic lifting platform, the horizontal state of the level meter and the hydraulic lifting platform can be seen. In this way, by observing the level bead during installation, the level meter can be installed horizontally by using a thin sheet under the dual-axis level meter. Summary of the invention

[0007] In order to solve the deficiencies in the prior art, the present invention provides an alarm signal processing device and method based on a dual-axis leveler which is easy to install, convenient to operate and has a good leveling effect.

[0008] In order to solve the above technical problems, the present invention adopts the following technical scheme: an alarm signal processing device based on a dual-axis level, including a hydraulic lifting platform, a dual-axis level, a level bead and a PLC controller. The dual-axis level is arranged at the center of the top of the hydraulic lifting platform. There are five level beads, one of which is arranged on the upper surface of the dual-axis level, and the other four level beads are respectively arranged around the top frame of the hydraulic lifting platform. The level bead on the dual-axis level and the four level beads on the hydraulic lifting platform are all in a horizontal state, and the four alarm output terminals of the dual-axis level are connected to the four input terminals of the PLC controller.

[0009] The output end of the PLC controller is connected to a solid-state relay, and the rising solenoid valve of the vertical cylinder of the hydraulic lifting platform is connected to the output end of the solid-state relay.

[0010] The alarm signal processing method based on the alarm signal processing device of the dual-axis level instrument comprises the following steps:

[0011] (1) Place a level bead on the upper surface of the dual-axis level and secure it;

[0012] (2) Find four planes on the frame around the edges of the hydraulic lifting platform, and then fix four level beads on the four planes on the hydraulic lifting platform;

[0013] (3) Adjust the hydraulic lifting platform so that the four level beads on the hydraulic lifting platform are in a horizontal state; then install the dual-axis level at the center of the top of the hydraulic lifting platform, so that the level beads on the dual-axis level and the four level beads on the hydraulic platform are in a horizontal state, ensuring that the dual-axis level and the hydraulic lifting platform are on the same horizontal plane;

[0014] (4) Connect the four alarm output terminals of the dual-axis level to the four input terminals of the PLC controller, and control the PLC controller to level the hydraulic lifting platform.

[0015] The horizontal adjustment of the four level beads on the hydraulic lifting platform is achieved by placing gaskets under the hydraulic lifting platform; the horizontal adjustment of the level beads on the dual-axis level and the four level beads on the hydraulic platform is achieved by placing thin sheets under the dual-axis level.

[0016] The specific steps of the PLC controller leveling the hydraulic lift in step (4) are as follows:

[0017] A. Set up the control circuit;

[0018] B. Filter control;

[0019] C. Leveling control;

[0020] D. Delay control.

[0021] The specific process of setting up the control circuit is to connect 4 solid-state relays to the output end of the PLC controller, and then connect the output ends of the 4 solid-state relays to the rising solenoid valves of the hydraulic lifting platform cylinder respectively, and stabilize the PLC controller output through the solid-state relays.

[0022] The specific process of filtering control is that when the PLC controller receives the alarm signal of the dual-axis level, it first enters the delay program, waits for about 1 second, and then performs control to eliminate the false alarm of the dual-axis level caused by equipment vibration.

[0023] The specific process of leveling control is that the PLC controller delays and waits for one second, and then performs leveling control, and the +X semi-axis, -X semi-axis and +Y semi-axis, -Y semi-axis correspond to vertical cylinder No. 1, vertical cylinder No. 2, vertical cylinder No. 3 and vertical cylinder No. 4 respectively, and the solenoid valve of the rising valve of the vertical cylinder corresponding to the alarm signal is opened to make it rise alone, and the other three vertical cylinders stop moving until the alarm signal disappears.

[0024] The specific process of delay control is that after the alarm signal disappears, the PLC controller still outputs a signal to the solenoid valve of the rising valve of the vertical cylinder corresponding to the alarm signal, so that it remains open for 0.6~0.8 seconds, so that the horizontal angle of the corresponding vertical cylinder is between -0.1 degrees and +0.1 degrees after it stops rising.

[0025] By adopting the above technical scheme, the present invention provides a device installed on a dual-axis level with a horizontal display and a modulated alarm signal. The horizontal state of the dual-axis level is displayed by a level bead, and the alarm signal of the dual-axis level is filtered and delayed by a PLC controller to eliminate the intermittent signal jitter caused by equipment vibration, and the alarm signal is delayed by a PLC controller to achieve the purpose of improving the leveling effect.

[0026] The leveling control of the hydraulic lifting platform by the PLC controller is completed by four steps: filtering control, leveling control, delay control and setting the control circuit. This not only ensures the leveling effect but also improves the reliability of the device.

[0027] In summary, the present invention solves the problems of difficult installation and poor control effect of the dual-axis level. The PLC controller can be used to program the alarm signal of the dual-axis level to eliminate the intermittent signal jitter caused by equipment vibration. At the same time, the alarm signal is delayed by the program of the PLC controller, so that the angle of the equipment after leveling is in a very ideal state, which greatly improves the leveling effect. This is incomparable to general leveling control. The use of the level bead and PLC controller not only improves the leveling effect of the hydraulic lifting platform, but also improves the safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0029] like Figure 1 As shown, the alarm signal processing device based on the dual-axis level of the present invention includes a hydraulic lifting platform 1, a dual-axis level 2, a level bead 3 and a PLC controller 4. The dual-axis level 2 is arranged at the center of the top of the hydraulic lifting platform 1. Five level beads 3 are arranged, one of which is arranged on the upper surface of the dual-axis level 2, and the other four level beads 3 are respectively arranged around the top frame of the hydraulic lifting platform 1. The level bead 3 on the dual-axis level 2 and the four level beads 3 on the hydraulic lifting platform 1 are all in a horizontal state, and the four alarm output terminals of the dual-axis level 2 are connected to the four input terminals of the PLC controller 4.

[0030] The output end of the PLC controller 4 is connected to a solid-state relay, and the rising solenoid valve of the vertical cylinder of the hydraulic lifting platform 1 is connected to the output end of the solid-state relay.

[0031] The alarm signal processing method of the alarm signal processing device based on the dual-axis level meter 2 comprises the following steps:

[0032] (1) Place a level bead 3 on the upper surface of the dual-axis level 2 and fix it with liquid glue or screws;

[0033] (2) Find four flat surfaces on the frame around the edges of the hydraulic lifting platform 1, and then fix the four level beads 3 on the hydraulic lifting platform 1 with liquid super glue or screws;

[0034] (3) Adjust the hydraulic lifting platform 1 by placing a gasket under the hydraulic lifting platform 1 so that the four level beads 3 on the hydraulic lifting platform 1 are all in a horizontal state; then install a dual-axis level 2 at the exact center of the top of the hydraulic lifting platform 1. The dual-axis level 2 is a rectangular parallelepiped with a fixing hole at each corner (four in total). Four threaded holes are drilled at the exact center of the top of the hydraulic lifting platform 1 according to the size of the fixing holes of the dual-axis level 2 for installing the dual-axis level 2; four 5 kg springs are placed under the mounting holes of the dual-axis level 2, and then bolts are passed through the mounting holes of the dual-axis level 2 and the springs under the dual-axis level 2 and fastened to the drilled threaded holes, and then the dual-axis level is installed horizontally by tightening the four bolts; thereby making the level beads 3 on the dual-axis level 2 and the four level beads 3 on the hydraulic platform all in a horizontal state, so that the dual-axis level 2 and the hydraulic lifting platform 1 can be ensured to be on the same horizontal plane;

[0035] (4) Connect the four alarm output terminals of the dual-axis level 2 to the four input terminals of the PLC controller 4, and control the PLC controller 4 to perform leveling control on the hydraulic lifting platform.

[0036] The specific steps of the PLC controller 4 for leveling the hydraulic flat lift are:

[0037] A. Set up the control circuit;

[0038] B. Filter control;

[0039] C. Leveling control;

[0040] D. Delay control.

[0041] The specific process of setting up the control circuit is: install four solid-state relays, connect the input ends of the solid-state relays to the output points Q0.1, Q0.2, Q0.3, and Q0.4 of the PLC controller 4 respectively, and connect the rising solenoid valve of the vertical cylinder of the hydraulic lifting platform 1 to the output end of the solid-state relay, so that the control circuit is completed; since the output end load capacity of the PLC controller 4 is limited, the solid-state relay has the advantages of fast response time and large carrying capacity, so the installation of solid-state relays can ensure the stability of the output of the PLC controller 4.

[0042] The specific process of filtering control is: when the PLC controller 4 receives the alarm signal of the dual-axis level 2, it processes the alarm signal and filters out alarm signals with a duration of less than 0.5 seconds (because the time for false alarms caused by vibration of the dual-axis level 2 is generally around 0.4 seconds), and only retains alarm signals with a duration of more than 0.5 seconds.

[0043] The specific process of leveling control is to correspond the +X semi-axis, -X semi-axis and +Y semi-axis, -Y semi-axis to the 4 input points I0.1, I0.2, I0.3, I0.4 of the PLC controller respectively. The rising solenoid valves of the No. 1 vertical cylinder, No. 2 vertical cylinder, No. 3 vertical cylinder and No. 4 vertical cylinder correspond to the PLC output points Q0.1, Q0.2, Q0.3, Q0.4. For example: when the input point I0.1 receives an alarm signal (the position of the +X semi-axis is too low), the output point Q0.1 opens (the rising valve solenoid valve of the No. 1 vertical cylinder opens), that is, the No. 1 vertical cylinder rises alone, and the other three vertical cylinders stop. When the alarm disappears after rising to the +X semi-axis, the delay program is entered.

[0044] The specific process of delay control is: after the alarm signal of input point I0.1 disappears, PLC output point Q0.1 is still open for a period of time (about 0.8 seconds) to make the No. 1 vertical cylinder rise for a period of time and then stop, and then wait for 0.5 seconds. If no alarm signal is received, the control ends. Since the horizontality of the dual-axis level 2 has a range, that is, the angle between -0.5 degrees and +0.5 degrees is considered to be horizontal and no alarm will be given. If the corresponding vertical cylinder stops rising immediately after the alarm signal of the dual-axis level 2 disappears, the horizontal angle is often between 0.5 degrees and 0.4 degrees, which is not an ideal angle. Therefore, the alarm signal is delayed in the program to ensure that the horizontal angle of the No. 1 vertical cylinder is between -0.1 degrees and +0.1 degrees after it stops rising.

[0045] This embodiment does not impose any formal limitation on the shape, material, structure, etc. of the present invention. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. An alarm signal processing method based on an alarm signal processing device of a dual-axis level, characterized in that: The alarm signal processing device based on the dual-axis level comprises a hydraulic lifting platform, a dual-axis level, a level bead and a PLC controller. The dual-axis level is arranged at the center of the top of the hydraulic lifting platform. Five level beads are arranged, one of which is arranged on the upper surface of the dual-axis level, and the other four level beads are arranged around the top frame of the hydraulic lifting platform. The level bead on the dual-axis level and the four level beads on the hydraulic lifting platform are all in a horizontal state. The four alarm output terminals of the dual-axis level are connected to the four input terminals of the PLC controller. The output end of the PLC controller is connected to a solid-state relay, and the rising solenoid valve of the vertical cylinder of the hydraulic lifting platform is connected to the output end of the solid-state relay; The alarm signal processing method comprises the following steps: (1) Place a level bead on the upper surface of the dual-axis level and secure it; (2) Find four planes on the frame around the edges of the hydraulic lifting platform, and then fix four level beads on the four planes on the hydraulic lifting platform; (3) Adjust the hydraulic lifting platform so that the four level beads on the hydraulic lifting platform are in a horizontal state; then install the dual-axis level at the center of the top of the hydraulic lifting platform, so that the level beads on the dual-axis level and the four level beads on the hydraulic platform are in a horizontal state, ensuring that the dual-axis level and the hydraulic lifting platform are on the same horizontal plane; (4) Connect the four alarm output terminals of the dual-axis level to the four input terminals of the PLC controller, and control the PLC controller to level the hydraulic lifting platform; The specific steps of the PLC controller leveling the hydraulic lift in step (4) are as follows: A. Set up the control circuit; B. Filter control; C. Leveling control; D. Delay control.

2. The alarm signal processing method according to claim 1, characterized in that: The horizontal adjustment of the four level beads on the hydraulic lifting platform is achieved by placing gaskets under the hydraulic lifting platform; the horizontal adjustment of the level beads on the dual-axis level and the four level beads on the hydraulic platform is achieved by placing thin sheets under the dual-axis level.

3. The alarm signal processing method according to claim 1, characterized in that: The specific process of setting up the control circuit is to connect 4 solid-state relays to the output end of the PLC controller, and then connect the output ends of the 4 solid-state relays to the rising solenoid valves of the hydraulic lifting platform cylinder respectively, and stabilize the PLC controller output through the solid-state relays.

4. The alarm signal processing method according to claim 3, characterized in that: The specific process of filtering control is that when the PLC controller receives the alarm signal of the dual-axis level, it first enters the delay program, waits for about 1 second, and then performs control to eliminate the false alarm of the dual-axis level caused by equipment vibration.

5. The alarm signal processing method according to claim 3, characterized in that: The specific process of leveling control is that the PLC controller delays and waits for one second, and then performs leveling control, and the +X semi-axis, -X semi-axis and +Y semi-axis, -Y semi-axis correspond to vertical cylinder No. 1, vertical cylinder No. 2, vertical cylinder No. 3 and vertical cylinder No. 4 respectively, and the solenoid valve of the rising valve of the vertical cylinder corresponding to the alarm signal is opened to make it rise alone, and the other three vertical cylinders stop moving until the alarm signal disappears.

6. The alarm signal processing method according to claim 5, characterized in that: The specific process of delay control is that after the alarm signal disappears, the PLC controller still outputs a signal to the solenoid valve of the rising valve of the vertical cylinder corresponding to the alarm signal, so that it remains open for 0.6~0.8 seconds, so that the horizontal angle of the corresponding vertical cylinder is between -0.1 degrees and +0.1 degrees after it stops rising.

Images