Two-axis turntable control protection circuit with lodging function

Abstract

Two travel switches are installed in series in the pitching direction, one travel switch is normally open, the other travel switch is normally closed, when pitching rises to a certain angle from the zero position, the normally open travel switch is closed, a coil of an azimuth contactor is powered on, a normally open contact of the contactor is closed, and azimuth strong current power-up self-locking is completed. When pitching descends to a certain angle, the normally-closed travel switch is switched off, the orientation and pitching contactor coil is powered off, and orientation and pitching strong current power-off is completed; a travel switch is installed in the azimuth direction, when the antenna can be safely recycled within a certain range of the azimuth angle, the travel switch is closed, and pitching strong-current power-up is kept. Under the condition that mechanical limiting cannot be installed, pure hardware electric limiting is added, the problem of software limiting failure caused by program runaway or position feedback sensor faults is avoided, and the safety of equipment is improved.

Description

Technical Field

[0001] The invention relates to a two-axis turntable device requiring position limiting, and in particular to a two-axis turntable control protection circuit with lodging function. Background Art

[0002] A two-axis turntable device that needs to be limited. When working, the antenna rises and unfolds, and the two-axis angles of pitch and azimuth can be controlled. When the device is not working, it can be recovered by lying down to facilitate the operation of the carrier. Figure 1 As shown. For many turntable devices, the antenna and other structures will interfere in azimuth within a certain pitch angle range, so they cannot rotate. When recovering, it is also necessary to ensure that the azimuth antenna angle is always within the safe range. Often, in such cases, the function cannot be achieved by directly installing mechanical limits. The patent "A limit turntable device (CN201710943867.4)" designs a limit baffle. This simple single mechanical limit cannot achieve the coupling limit protection between azimuth and pitch. The patent "A turntable with an automatic limit device (CN110125889A)" designs dual protection of limit mechanism and proximity switch, in which the proximity switch is connected to the controller, and the motor is controlled by the controller to start and stop, but this simple proximity switch control cannot achieve the two-axis coupling limit protection function, and the reliability of the limit through the controller program software cannot be guaranteed. When the controller fails or the program runs away, it does not have the limit protection function. Therefore, further design is needed to improve the safety of the equipment. Summary of the invention

[0003] The purpose of the present invention is to provide a control protection circuit for a two-axis turntable with lodging, so as to improve the reliability and safety of the two-axis turntable when working.

[0004] The technical solution to achieve the purpose of the present invention is: a two-axis turntable control protection circuit with lodging, which is used for two-axis turntable equipment that needs to be limited, and two travel switches are installed in series in the pitch direction, one is normally open and the other is normally closed. When the pitch rises from the zero position to a certain angle, the normally open travel switch is energized, the azimuth contactor coil is energized, and the normally open contact of the contactor is energized to complete the azimuth strong power self-locking; when the pitch drops to a certain angle, the normally closed travel switch is disconnected, the azimuth and pitch contactor coils are de-energized, and the azimuth and pitch strong power are de-energized; A limit switch is installed in the azimuth direction. When the azimuth angle is within a certain range and the antenna can be safely recovered, the limit switch is closed to keep the pitch strong power on.

[0005] Further, two travel switches are installed in series in the pitch direction, S1 is a normally open travel switch installed at the pitch 32° position, S2 is a normally closed travel switch installed at the pitch 30° position, the normally open travel switch S1, the normally closed travel switch S2 and the contactor KM1 coils A1 and A2 for controlling the power input of the azimuth driver are connected in series, and the normally open travel switch S1 and the normally open contacts 13 and 14 of the contactor KM1 are connected in parallel; The initial state of contactor KM1 is disconnected. During the operation of raising and unfolding the antenna, when the lodging mechanism rises past 30°, the normally closed contact of the normally closed travel switch S2 is first disconnected and then closed, and contactor KM1 remains disconnected from the strong power state; when it rises to 32°, the normally open contact of the normally open travel switch S1 is closed, coils A1 and A2 of contactor KM1 are energized, and the azimuth driver is powered on. At the same time, normally open contacts 13 and 14 of contactor KM1 are also closed. When the lodging mechanism rises more than 32°, although the normally open travel switch S1 is disconnected, the coil of contactor KM1 can be energized through the closed normally open contact, maintaining the azimuth enhanced power locking state; During the antenna descent and recovery process, when the lodging mechanism descends to 32°, the normally open contact of the normally open travel switch S1 is first closed and then disconnected, and the contactor KM1 remains connected to the strong power state; when it descends to 30°, the normally closed contact of the normally closed travel switch S2 is disconnected, the coils A1 and A2 of the contactor KM1 lose power, the contacts of the contactor KM1 are disconnected, and the azimuth driver disconnects the strong power.

[0006] Furthermore, the normally closed travel switch S2 is connected in series with the normally open contacts 13 and 14 of the contactor KM2 for controlling the power input of the pitch actuator, and then connected in parallel with the normally open travel switch S3 installed in the azimuth direction, and finally connected in series with the coils A1 and A2 of KM2; When the azimuth angle is within a certain range where the antenna can be safely recovered, i.e. 5°~+5°, the travel switch S3 is closed, and the coils A1 and A2 of KM2 are energized; When the azimuth angle is not within the range of -5°~+5°, S3 is disconnected. At this time, if the lodging mechanism descends to 30°, the normally closed contact of the normally closed travel switch S2 is disconnected first, and the coils A1 and A2 of the contactor KM2 lose power. At the same time, the normally open contacts 13 and 14 of the contactor KM2 are also disconnected, keeping the pitch drive disconnected from the strong power state.

[0007] Compared with the prior art, the present invention has the following significant advantages: it is easy to implement and low cost. After use, it solves the problem of structural interference protection when mechanical limit cannot be installed, avoids the risk of software limit failure caused by program runaway or position feedback sensor failure, and improves the safety and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1Schematic diagram of the two-axis turntable working status.

[0009] Figure 2 Schematic diagram of azimuth high-voltage control protection circuit.

[0010] Figure 3 Schematic diagram of the pitch high-voltage control protection circuit. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0012] The present invention discloses a two-axis turntable control protection circuit with a lodging function, which is used for two-axis turntable equipment that requires position limiting. The two-axis turntable equipment includes an azimuth axis and a pitch axis, wherein the pitch axis also serves as a lodging mechanism for recovering the azimuth antenna, and when the pitch angle is less than a certain value, the azimuth device will interfere with other structures. The two-axis turntable control protection circuit has two travel switches installed in series in the pitch direction (actually installed on the pitch electric cylinder, and can also be installed at the end of the pitch axis if no electric cylinder is used), one normally open and the other normally closed. When the pitch rises from the zero position to a certain angle, the normally open travel switch is energized, the azimuth contactor coil is energized, and the normally open contact of the contactor is energized, completing the azimuth strong power self-locking. When the pitch drops to a certain angle, the normally closed travel switch is disconnected, the azimuth and pitch contactor coils are de-energized, and the azimuth and pitch strong power are de-energized. A travel switch is installed in the azimuth direction (actually at the end of the azimuth axis). When the azimuth angle is within a certain range and the antenna can be safely recovered, the travel switch is closed to keep the pitch strong power on.

[0013] The azimuth antenna of the two-axis turntable can only rotate after the pitch axis is raised to a greater than a certain angle, and when it is recovered, it is also necessary to ensure that the angle of the azimuth antenna is within a certain range. In this case, the equipment cannot be protected by directly installing mechanical limits or switches, and if only the software limits in the program are used, safety and reliability cannot be guaranteed. The present invention installs travel switches at different positions and cooperates with relays to design a pure hardware self-locking control and protection circuit. When the motion conditions are met, strong electricity is attracted, and when interference may occur, the strong electricity is automatically disconnected, thereby improving the reliability and safety of the two-axis turntable during operation.

[0014] like Figure 1 As shown, when the vehicle-mounted equipment is working, the antenna is raised and unfolded. When the pitch angle is less than 30°, the antenna and the recovery cabin will interfere in azimuth, so they cannot rotate.

[0015] like Figure 2As shown, two travel switches are installed in series in the pitch direction. S1 is a normally open travel switch installed at the pitch 32° position, and S2 is a normally closed travel switch installed at the pitch 30° position. S1, S2 and the contactor KM1 coils A1 and A2 that control the power input of the azimuth drive are connected in series, and the normally open contacts 13 and 14 of S1 and KM1 are connected in parallel. The initial state of the contactor KM1 is disconnected.

[0016] During the antenna lifting and unfolding process, when the lodging mechanism rises past 30°, the normally closed contact of S2 is first opened and then closed, which has no effect on the strong current circuit, and the contactor KM1 remains disconnected from the strong current state. When it rises to 32°, the normally open contact of S1 is closed, the coils A1 and A2 of KM1 are energized, and the azimuth driver is powered. At the same time, the normally open contacts 13 and 14 of KM1 are also attracted. When the lodging mechanism rises more than 32°, although S1 is disconnected, the coil of KM1 can be energized through the attracted normally open contacts, maintaining the azimuth enhanced electrical locking state.

[0017] During the antenna descent and recovery process, when the lodging mechanism descends to 32°, the normally open contact of S1 is closed first and then disconnected, which has no effect on the high-voltage circuit, and the contactor KM1 remains connected to the high-voltage state. When it descends to 30°, the normally closed contact of S2 is disconnected, the coils A1 and A2 of KM1 lose power, the contact of KM1 is disconnected, and the azimuth driver disconnects the high-voltage.

[0018] like Figure 3 As shown, S2 is connected in series with the normally open contacts 13 and 14 of the contactor KM2 that controls the power input electricity of the pitch actuator, then connected in parallel with the normally open travel switch S3 installed in the azimuth direction, and finally connected in series with the coils A1 and A2 of KM2.

[0019] When the azimuth angle is within a certain range where the antenna can be safely recovered, as shown in the figure -5°~+5°, the travel switch S3 is closed and coils A1 and A2 of KM2 are energized.

[0020] When the azimuth angle is not within the range of -5°~+5°, S3 is disconnected. At this time, if the lodging mechanism descends to 30°, the normally closed contact of S2 is disconnected first, and the coils A1 and A2 of KM2 lose power. At the same time, the normally open contacts 13 and 14 of KM2 are also disconnected, keeping the pitch drive disconnected from the strong power state.

[0021] In summary, the present invention installs normally open and normally closed travel switches in the pitch direction, and another normally open travel switch in the azimuth direction, and cooperates with relays to design a self-locking control and protection circuit in a pure hardware form. When the motion conditions are met, strong electricity is attracted, and when interference may occur, the strong electricity is automatically disconnected, thereby improving the reliability and safety of the two-axis turntable during operation.

[0022] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0023] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A two-axis turntable control protection circuit with lodging, used for two-axis turntable equipment that needs to be limited, characterized in that: Two travel switches are installed in series in the pitch direction, one is normally open and the other is normally closed. When the pitch rises from zero position to a certain angle, the normally open travel switch is closed, the azimuth contactor coil is energized, and the normally open contact of the contactor is closed, completing the azimuth strong power self-locking; when the pitch drops to a certain angle, the normally closed travel switch is disconnected, the azimuth and pitch contactor coils are de-energized, completing the azimuth and pitch strong power de-energization; A limit switch is installed in the azimuth direction. When the azimuth angle is within a certain range and the antenna can be safely recovered, the limit switch is closed to keep the pitch strong power on.

2. The control protection circuit of the two-axis turntable with lodging according to claim 1 is characterized in that: Two travel switches are installed in series in the pitch direction, S1 is a normally open travel switch installed at the pitch 32° position, S2 is a normally closed travel switch installed at the pitch 30° position, the normally open travel switch S1, the normally closed travel switch S2 and the contactor KM1 coils A1 and A2 for controlling the power input of the azimuth driver are connected in series, and the normally open travel switch S1 and the normally open contacts 13 and 14 of the contactor KM1 are connected in parallel; The initial state of contactor KM1 is disconnected. During the antenna lifting and unfolding process, when the lodging mechanism rises past 30°, the normally closed contact of the normally closed travel switch S2 is first disconnected and then closed, and contactor KM1 remains disconnected from the strong power state; when it rises to 32°, the normally open contact of the normally open travel switch S1 is closed, coils A1 and A2 of contactor KM1 are energized, and the azimuth driver is powered on. At the same time, normally open contacts 13 and 14 of contactor KM1 are also attracted. When the lodging mechanism rises more than 32°, although the normally open travel switch S1 is disconnected, the coil of contactor KM1 can be energized through the attracted normally open contact to maintain the azimuth enhanced electric locking state; During the antenna descent and recovery process, when the lodging mechanism descends to 32°, the normally open contact of the normally open travel switch S1 is first closed and then disconnected, and the contactor KM1 remains connected to the strong power state; when it descends to 30°, the normally closed contact of the normally closed travel switch S2 is disconnected, the coils A1 and A2 of the contactor KM1 lose power, the contacts of the contactor KM1 are disconnected, and the azimuth driver disconnects the strong power.

3. The control protection circuit of the two-axis turntable with lodging according to claim 2 is characterized in that: The normally closed travel switch S2 is connected in series with the normally open contacts 13 and 14 of the contactor KM2 that controls the power input of the pitch actuator, and then connected in parallel with the normally open travel switch S3 installed in the azimuth direction, and finally connected in series with the coils A1 and A2 of KM2; When the azimuth angle is within a certain range where the antenna can be safely recovered, i.e. 5°~+5°, the travel switch S3 is closed, and the coils A1 and A2 of KM2 are energized; When the azimuth angle is not within the range of -5°~+5°, S3 is disconnected. At this time, if the lodging mechanism descends to 30°, the normally closed contact of the normally closed travel switch S2 is disconnected first, and the coils A1 and A2 of the contactor KM2 lose power. At the same time, the normally open contacts 13 and 14 of the contactor KM2 are also disconnected, keeping the pitch drive disconnected from the strong power state.

4. The control protection circuit of the two-axis turntable with lodging according to claim 2 or 3, characterized in that: Angle setting changes according to different structural characteristics.

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