Seismometer zero setting device

Abstract

The utility model provides a seismometer zeroing device which comprises a pendulum body support, a zeroing transmission mechanism and a pendulum bob assembly, the zeroing transmission mechanism and the pendulum bob assembly are respectively arranged on the pendulum body support, the zeroing transmission mechanism comprises a zeroing motor, a driving shaft of the zeroing motor is fixedly provided with a driving gear, and the driving gear is in meshed connection with a driven gear. The driven gear is fixedly connected with a gear shaft, the gear shaft is sleeved with a zero setting shaft, the lower end of the zero setting shaft is bonded with a quartz ball, the quartz ball is connected with a quartz plate in a pressing mode, the quartz plate is bonded with one side of a zero setting plate, the other side of the zero setting plate is connected with a swing body support through a spring piece, and one end of a back spring is connected with the zero setting plate. The other end of the back spring is connected with the pendulum bob assembly. According to the seismometer zeroing device provided by the utility model, zero point adjustment can be completed by controlling the operation of the zeroing motor, the adjustment operation is convenient, and the adjustment precision is high.

Description

Technical Field

[0001] The utility model relates to the technical field of seismographs, in particular to a zero adjustment device for a seismograph. Background Art

[0002] There are generally two existing zero adjustment devices for seismographs: the first is to adjust the installation attitude of the mechanical pendulum body of the seismograph, but this will change the spatial orthogonality of the three-component mechanical pendulum body; the second is to adjust the bending degree of the back spring by adjusting the back spring mounting shaft, which does not affect the spatial orthogonality of the three components, but the adjustment speed is too fast, the amplitude is too large, and it is not delicate enough. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a zero adjustment device for a seismograph, which can solve the problem of poor zero adjustment accuracy existing in the existing zero adjustment device for a seismograph.

[0004] The utility model provides a zero adjustment device for a seismograph, which comprises a pendulum body bracket, a zero adjustment transmission mechanism and a pendulum weight assembly respectively arranged on the pendulum body bracket. The zero adjustment transmission mechanism comprises a zero adjustment motor, a driving shaft of the zero adjustment motor is fixedly provided with a driving gear, the driving gear is meshed with a driven gear, the driven gear is fixedly connected with a gear shaft, a zero adjustment shaft is sleeved outside the gear shaft, a quartz ball is bonded to the lower end of the zero adjustment shaft, the quartz ball is tightly connected with a quartz plate, the quartz plate is adhesively connected with one side of a zero adjustment plate, the other side of the zero adjustment plate is connected with the pendulum body bracket through a spring piece, one end of a back spring is connected with the zero adjustment plate, and the other end of the back spring is connected with the pendulum weight assembly; the gear shaft can drive the zero adjustment shaft to rotate and move up and down, so as to press the quartz plate through the quartz ball, the quartz plate drives the zero adjustment plate to be toggled, and the bending degree of the back spring is changed through the toggling of the zero adjustment plate, so as to drive the pendulum weight assembly to perform zero adjustment through the back spring.

[0005] According to the zero adjustment device for a seismograph provided by the utility model, the pendulum weight assembly comprises a pendulum weight and two moving plates, and each moving plate is fixedly connected with the pendulum weight.

[0006] According to the zero adjustment device for a seismograph provided by the utility model, the pendulum weight is installed on the pendulum body bracket through a cross spring, the pendulum weight can rotate around the cross spring, and the pendulum weight is fixedly connected with the other end of the back spring.

[0007] According to the zero adjustment device for a seismograph provided by the utility model, the gear shaft and the zero adjustment shaft are connected through a pin shaft, the zero adjustment shaft is in threaded connection with a zero adjustment motor bracket, a limiting groove extending along the axial direction is further arranged on the zero adjustment shaft, and the pin shaft and the limiting groove are in up-and-down sliding fit.

[0008] According to the zeroing device of a seismometer provided by the utility model, a displacement transducer for detecting the position of the fixed electrode plate is provided on the moving electrode plate.

[0009] According to a seismometer zeroing device provided by the utility model, two limit columns for limiting the movement range of the zeroing plate are installed on the pendulum support, and a contact sensor is installed on each limit column.

[0010] According to the zeroing device of a seismometer provided by the utility model, a limit circuit board is installed on the pendulum bracket, and the limit circuit board is electrically connected to the contact sensor.

[0011] According to a seismometer zeroing device provided by the present invention, a zero position detection circuit board for detecting the zero position signal of the pendulum assembly is installed on the pendulum body bracket, and the zero position detection circuit board is electrically connected to the displacement transducer.

[0012] According to the zeroing device of a seismometer provided by the present invention, a motor drive circuit board is installed on the pendulum bracket, and the motor drive circuit board is electrically connected to the zeroing motor.

[0013] According to the utility model, a seismometer zeroing device further includes a ground monitoring device, which is provided with a central processing unit, and the central processing unit is electrically connected to the displacement transducer, the limit circuit board, the zero position detection circuit board and the motor drive circuit board respectively.

[0014] The zeroing device of the utility model provides a seismometer, since the zeroing transmission mechanism includes a zeroing motor, a driving gear is fixedly installed on the driving shaft of the zeroing motor, the driving gear is meshed with the driven gear, the driven gear is fixedly connected to the gear shaft, a zeroing shaft is sleeved on the outer side of the gear shaft, a quartz ball is bonded to the lower end of the zeroing shaft, the quartz ball is pressed and connected with the quartz plate, the quartz plate is bonded to one side of the zeroing plate, the other side of the zeroing plate is connected to the pendulum body bracket through a spring sheet, one end of the back spring is connected to the zeroing plate, and the other end of the back spring is connected to the pendulum assembly; when working, by controlling the zeroing motor to rotate, the driving gear can be driven to rotate, and then the gear shaft can be driven to rotate and move up and down, so that the quartz plate is pressed by the quartz ball, and the quartz plate drives the zeroing plate to toggle, and the bending degree of the back spring is changed by the toggle of the zeroing plate, so that the pendulum assembly is driven by the back spring to perform zeroing. Therefore, the seismometer zeroing device provided by the present invention can realize rapid zero point adjustment of the seismometer by controlling the operation of the zeroing motor after the seismometer is installed, which not only facilitates the adjustment operation but also has high adjustment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 Isometric view of the seismometer zero adjustment device of the present invention;

[0017] Figure 2 Front view of the seismometer zero adjustment device of the present invention;

[0018] Figure 3 Is Figure 2 A-A sectional view of.

[0019] Explanation of reference numerals:

[0020] 1. Pendulum body support; 2. Zero adjustment motor; 3. Driving gear; 4. Driven gear; 5. Gear shaft; 6. Zero adjustment shaft; 7. Quartz ball; 8. Quartz plate; 9. Zero adjustment plate; 10. Back spring; 11. Pendulum bob; 12. Moving electrode plate; 13. Fixed electrode plate; 14. Cross spring; 15. Limit post; 16. Limit circuit board. Specific embodiments

[0021] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0023] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined. In addition, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] As Figures 1 to 3 shown, the seismometer zero adjustment device of the embodiment of the present utility model includes a pendulum body bracket 1, and a zero adjustment transmission mechanism and a pendulum assembly respectively arranged on the pendulum body bracket 1.

[0025] Among them, the zero adjustment transmission mechanism includes a zero adjustment motor 2. A driving gear 3 is fixedly installed on the driving shaft of the zero adjustment motor 2. The driving gear 3 is meshed and connected with a driven gear 4. The driven gear 4 is fixedly connected with a gear shaft 5. A zero adjustment shaft 6 is sleeved outside the gear shaft 5. A quartz ball 7 is bonded to the lower end of the zero adjustment shaft 6. The quartz ball 7 is press-connected with a quartz plate 8. The quartz plate 8 is adhesively bonded to one side of a zero adjustment plate 9. The other side of the zero adjustment plate 9 is connected to the pendulum body bracket through a spring piece, and the zero adjustment plate 9 is fixedly connected to one end of a back spring 10. The other end of the back spring 10 is connected to the pendulum assembly.

[0026] During operation, the rotation of the zero adjustment motor 2 can drive the driving gear 3 to rotate. The driving gear 3 drives the driven gear 4 to rotate. The driven gear 4 drives the gear shaft 5 to rotate. The gear shaft 5 can drive the zero adjustment shaft 6 to rotate and move up and down, so as to press the quartz plate 8 through the quartz ball 7 on the zero adjustment shaft 6. The quartz plate 8 then drives the zero adjustment plate 9 to move, and changes the bending degree of the back spring 10 through the movement of the zero adjustment plate 9, so as to drive the pendulum assembly to perform zero adjustment through the back spring 10.

[0027] Among them, the movement of the zero adjustment plate 9 is based on the lever principle. Since the zero adjustment shaft 6 always bears the upward pressure from the zero adjustment plate 9, it avoids the gap that may occur during positive and negative adjustments in the process of adjusting the bending degree of the back spring by adjusting the back spring mounting shaft in the prior art, greatly increasing the zero adjustment accuracy and avoiding the problem of back-and-forth adjustment.

[0028] Since the quartz ball 7 and the quartz plate 8 are used for pressure conduction, the smoothness of the quartz material prevents stress accumulation caused by incomplete sliding. And because of the high hardness of the quartz, it avoids the slight deformation that may occur in general metals under long-term pressure, ensuring the stability of the zero point.

[0029] Thus, for the seismometer zero adjustment device according to the embodiment of the present utility model, after the seismometer is installed, the rapid zero adjustment of the seismometer can be achieved by controlling the operation of the zero adjustment motor. It is not only convenient for adjustment operation but also has high adjustment accuracy.

[0030] The seismometer zero adjustment device according to the embodiment of the present utility model is applicable to a three-component mechanical pendulum body, and the seismometer zero adjustment device of this embodiment is provided on each mechanical pendulum body.

[0031] In some embodiments of the present utility model, the pendulum assembly includes a pendulum 11 and two moving plates 12. Each moving plate 12 is fixedly connected to the pendulum 11, and the pendulum 11 is fixedly connected to the other end of the back spring 10. The pendulum 11 is mounted on the pendulum body bracket 1 through a cross spring 14, and the pendulum 11 can slightly rotate around the cross spring 14.

[0032] Among them, a fixed plate 13 is provided between the two moving plates 12. The two sides of the fixed plate 13 are respectively fixedly connected to the pendulum body bracket 1. When the back spring 10 drives the pendulum 11 to rotate around the cross spring 14 under the action of the zero adjustment plate 9, it can drive the positions of the two moving plates 12 fixed on the pendulum 11 to be shifted, so as to adjust the fixed plate 13 to be in the middle position between the two moving plates 12, thereby achieving zero adjustment. That is to say, the purpose of zero adjustment is to adjust the two moving plates 12 to have the same gap from the fixed plate 13, so that after zero adjustment, the fixed plate 13 is located in the middle of the two moving plates 12 and they do not contact each other.

[0033] Specifically, the zero adjustment motor 2 is installed on the zero adjustment motor bracket, and the zero adjustment motor bracket is installed on the pendulum body bracket 1. The zero adjustment motor bracket is provided with a threaded hole adapted to the zero adjustment shaft 6. The gear shaft 5 and the zero adjustment shaft 6 are connected by a pin shaft, and the pin shaft is fixedly connected to the gear shaft 5. That is to say, the rotation of the gear shaft 5 can drive the zero adjustment shaft 6 to rotate. The zero adjustment shaft 6 is threadedly connected to the zero adjustment motor bracket, so that the zero adjustment shaft 6 and the zero adjustment motor bracket form a lead screw-nut structure. When the zero adjustment shaft 6 rotates, it will move up and down along the threaded hole of the zero adjustment motor bracket, so as to realize the up and down movement of the zero adjustment shaft 6 while rotating. A limiting groove extending axially is also provided on the zero adjustment shaft 6, and the pin shaft and the limiting groove are slidably matched up and down to play a limiting role, so that the zero adjustment shaft 6 can move up and down along the gear shaft 5 while rotating with the gear shaft 5.

[0034] Specifically, a displacement transducer for detecting the position of the fixed pole plate 13 is provided on the moving pole plate 12. The position information of the fixed pole plate 13 can be converted into an electrical signal through the displacement transducer. Among them, a zero position detection circuit board for detecting the zero position signal of the pendulum assembly is also installed on the pendulum body bracket 1. The zero position detection circuit board is electrically connected to the displacement transducer, so as to collect the zero position signal of the mechanical pendulum after transformation in real time and upload it to the ground monitoring device.

[0035] Specifically, two limit posts 15 for restricting the moving range of the zero adjustment plate 9 are installed on the pendulum body bracket 1. Contact sensors are installed on each limit post 15. A limit circuit board 16 is also installed on the pendulum body bracket 1. The limit circuit board 16 is electrically connected to the contact sensor. When the zero adjustment plate 9 contacts one of the limit posts 15, the corresponding contact sensor is triggered. At this time, the zero adjustment motor 2 is controlled to rotate in the reverse direction, so that the zero adjustment plate 9 is separated from the limit post 15, the zero adjustment is ended, and the limit information is uploaded to the ground monitoring device.

[0036] Specifically, a motor drive circuit board is also installed on the pendulum body bracket 1. The motor drive circuit board is electrically connected to the zero adjustment motor 2. The motor drive circuit is used to amplify the driving ability of the control signal and effectively drive the normal operation of the zero adjustment motor 2.

[0037] Specifically, the ground monitoring device is provided with a central processor, and the central processor is electrically connected to the limit circuit board, the zero position detection circuit board and the motor drive circuit board respectively, so as to realize the remote zero adjustment of the seismometer zero adjustment device.

[0038] In the seismometer zero adjustment device of the embodiment of the present utility model, the control principle of the central processor is as follows:

[0039] After the seismometer is powered on, wait for 20 s. After the system is stable, the central processor controls the seismometer to switch from the long-period working mode to the short-period zero adjustment mode, so that the zero position information can respond in real time as the position of the pendulum changes. The central processor first detects the locked pendulum state of the seismometer. If it is in the locked pendulum state, the unlocking pendulum action is first performed. Then, the central processor performs corresponding processing according to the collected zero position information of the seismometer, and controls the rotation time and direction of the zero adjustment motors of the three-component mechanical pendulum body. While the zero adjustment motors are rotating, the central processor monitors the zero position information in real time. When the zero position information of the three-component mechanical pendulum body is within the zero position threshold range, the central processor controls the seismometer to switch to the long-period normal working mode, and the zero adjustment ends, so as to achieve the purpose of fast and accurate zero adjustment.

[0040] The zero adjustment device of the seismometer according to the embodiment of the present utility model can automatically complete zero adjustment after the seismometer is installed and powered on, or can remotely adjust the zero point through ground monitoring equipment. The zero point can be adjusted within plus or minus 0.5 volts through this device. When the seismometer is installed too obliquely and zero adjustment cannot be completed, this device adopts a limit structure composed of a limit circuit board 16 and a limit post 15 to avoid mechanical damage caused by over-adjustment.

[0041] It should be noted that in this embodiment, the control principle and method of the central processing unit belong to the control principle and method of the prior art, so it does not involve the improvement of the method.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A seismometer zero-adjusting device, characterized in that, It includes a pendulum body support, a zero-adjustment transmission mechanism and a pendulum bob assembly respectively arranged on the pendulum body support. The zero-adjustment transmission mechanism includes a zero-adjustment motor. A driving gear is fixedly installed on the driving shaft of the zero-adjustment motor. The driving gear is meshed and connected with a driven gear. The driven gear is fixedly connected with a gear shaft. A zero-adjustment shaft is sleeved outside the gear shaft. A quartz ball is bonded to the lower end of the zero-adjustment shaft. The quartz ball is tightly connected with a quartz plate. The quartz plate is adhesively bonded to one side of a zero-adjustment plate. The other side of the zero-adjustment plate is connected with the pendulum body support through a spring piece. One end of a back spring is connected with the zero-adjustment plate, and the other end of the back spring is connected with the pendulum bob assembly; the gear shaft can drive the zero-adjustment shaft to rotate and move up and down to press the quartz plate through the quartz ball. The quartz plate drives the zero-adjustment plate to be toggled, and the bending degree of the back spring is changed through the toggling of the zero-adjustment plate, so as to drive the pendulum bob assembly to perform zero adjustment through the back spring.

2. The seismometer zero adjustment device according to claim 1, characterized in that, The pendulum bob assembly includes a pendulum bob and two moving plates, and each of the moving plates is fixedly connected with the pendulum bob.

3. The seismometer zero adjustment device according to claim 2, characterized in that, The pendulum bob is installed on the pendulum body support through a cross spring. The pendulum bob can rotate around the cross spring, and the pendulum bob is fixedly connected with the other end of the back spring.

4. The seismometer zero adjustment device according to claim 1, characterized in that, The gear shaft and the zero-adjustment shaft are connected through a pin shaft. The zero-adjustment shaft is in threaded connection with a zero-adjustment motor bracket. A limiting groove extending axially is also provided on the zero-adjustment shaft. The pin shaft and the limiting groove are in sliding fit up and down.

5. The seismometer zero adjustment device according to claim 2, characterized in that A displacement transducer for detecting the position of a fixed plate is provided on the moving plate.

6. The seismometer zero-adjusting device according to claim 5, characterized in that, Two limiting columns for limiting the moving range of the zero-adjustment plate are installed on the pendulum body support, and contact sensors are respectively installed on the limiting columns.

7. The seismometer zero adjustment device according to claim 6, characterized in that, A limiting circuit board is installed on the pendulum body support, and the limiting circuit board is electrically connected with the contact sensors.

8. The seismometer zero adjustment device according to claim 7, characterized in that A zero-position detection circuit board for detecting the zero-position signal of the pendulum bob assembly is installed on the pendulum body support, and the zero-position detection circuit board is electrically connected with the displacement transducer.

9. The seismometer zero adjustment device according to claim 8, characterized in that, A motor drive circuit board is installed on the pendulum body support, and the motor drive circuit board is electrically connected with the zero-adjustment motor.

10. The seismometer zero adjustment device according to claim 9, characterized in that, It further includes a ground monitoring device. The ground monitoring device is provided with a central processor, and the central processor is electrically connected with the limiting circuit board, the zero-position detection circuit board and the motor drive circuit board respectively.

Images