Instant and stable acceleration measurement assembly temperature control device and gravimeter

Abstract

The invention discloses an instant stable acceleration measurement assembly temperature control device and a gravimeter. The instant stable acceleration measurement assembly temperature control device comprises a first radiator assembly, a second radiator assembly, a side wall heat preservation assembly, an acceleration sensing unit, an acceleration information processing module, a mounting base, a third radiator assembly and a fourth radiator assembly which are connected from top to bottom. The side wall heat preservation assembly is located on the outer side of the acceleration sensing unit and the acceleration information processing module and divides the acceleration sensing unit and the acceleration information processing module into two cavities. The bottom of the acceleration sensing unit and the bottom of the acceleration information processing module are embedded in the mounting base. The four radiator assemblies are arranged on the upper side and the lower side of the acceleration sensing unit and the acceleration information processing module, the upper face and the lower face can be heated or refrigerated at the same time to achieve temperature control, a temperature control target point is designed to be the temperature when the device is started, and rapid temperature control in the wide temperature range is achieved; and the acceleration sensing unit and the acceleration information processing module are subjected to cavity independent temperature control, so that the temperature control precision is ensured.

Description

Technical Field

[0001] The invention relates to the field of temperature control thermal design of a gravimeter, and in particular to an instant and stable acceleration measurement component temperature control device and a gravimeter. Background Art

[0002] The core sensitive device of the gravimeter is the acceleration measurement component, which is mainly composed of an acceleration sensitive unit and an acceleration information processing module. Among them, the acceleration sensitive unit is composed of three flexible quartz accelerometers. The acceleration measurement component requires the temperature field to maintain high precision and stability to ensure the output accuracy of the acceleration value. The stabilization time of the temperature field directly affects the startup time of the device.

[0003] In current products, it takes a long time for the gravimeter to start up and complete the operation to enter the measurement state. The startup time is long, and the traditional temperature control belongs to high-temperature temperature control. The temperature control target point is generally set higher than the ambient temperature, and the temperature field stabilization time is slow. In addition, the existing technology puts the acceleration sensitive unit and the acceleration information processing module in the same cavity, and the coupling degree is very high, which is not conducive to temperature control. This product is based on the minimum thermal capacity design concept and comprehensive means such as sub-cavity temperature control to maximize the temperature control speed and temperature control accuracy. Summary of the invention

[0004] In order to ensure the speed and accuracy of temperature control, the present invention provides an instant stable acceleration measurement device temperature control device and a gravimeter.

[0005] To this end, the technical solution adopted in the present invention is:

[0006] Provided is a temperature control device for an instantaneous stable acceleration measurement device, comprising a first radiator assembly and a second radiator assembly, a side wall insulation assembly, an acceleration sensitive unit, an acceleration information processing module, a mounting base, a third radiator assembly and a fourth radiator assembly connected from top to bottom;

[0007] The side wall insulation component is located outside the acceleration sensitive unit and the acceleration information processing module, and separates the acceleration sensitive unit and the acceleration information processing module in two cavities; the bottom of the acceleration sensitive unit and the acceleration information processing module is embedded in the mounting base;

[0008] The bottoms of the first radiator assembly, the second radiator assembly, the third radiator assembly and the fourth radiator assembly respectively contain heat exchange components;

[0009] The first radiator assembly and the third radiator assembly are respectively located on the upper and lower sides of the acceleration sensitive unit, and are respectively connected to the acceleration sensitive unit through heat exchange devices; the second radiator assembly and the fourth radiator assembly are respectively located on the upper and lower sides of the acceleration information processing module, and are respectively connected to the acceleration information processing module through heat exchange devices.

[0010] According to the above scheme, the radiator assembly also includes a fan, a heat sink, a first thermal pad, a second thermal pad, a first platinum resistor sensor, a second platinum resistor sensor, a TEC, and a foam board, wherein the first thermal pad and the first platinum resistor sensor are installed on the hot side of the TEC, and the second thermal pad and the second platinum resistor sensor are installed on the cold side of the TEC; the fan and the heat sink are located on the hot side of the TEC, and the fan speed is adjustable; the foam board is located around the heat exchange device.

[0011] According to the above scheme, the acceleration sensitive unit includes a flexible quartz accelerometer, a third thermal pad, an upper cover, and a base; wherein the upper cover and the base are installed tightly without a gap; the third thermal pad is placed on the base and is located on the bottom surface of the flexible quartz accelerometer; and the side of the flexible quartz accelerometer is coated with thermal grease.

[0012] According to the above scheme, platinum resistance sensors are attached to the upper and lower surfaces of the acceleration information processing module; platinum resistance sensors are attached to the bottom surface of the flexible quartz accelerometer, the bottom surface of the base and the side surface of the base of the acceleration sensitive unit.

[0013] According to the above scheme, the heat exchange device is the only temperature output port of the radiator assembly. The output temperature of the heat exchange device can be regulated by TEC. The temperature of the acceleration sensitive unit and the acceleration information processing module is controlled by the output temperature of the heat exchange device.

[0014] According to the above scheme, the cavity of the side wall insulation component where the acceleration sensitive unit and the acceleration information processing module are located is filled with foam boards around; the gap positions in the acceleration sensitive unit and the gap positions in the acceleration information processing module are filled with thermal conductive glue.

[0015] According to the above scheme, the side wall insulation assembly and the mounting base are made of rigid materials with good thermal insulation performance.

[0016] According to the above solution, the heat exchange device is made of a metal material with good thermal conductivity.

[0017] According to the above solution, the foam board is made of a material with good thermal insulation performance.

[0018] A gravimeter is provided, which uses the instant stable acceleration measurement component temperature control device described in any one of the above items to control the temperature.

[0019] The beneficial effects of the present invention are as follows: the present invention can heat or cool the upper and lower surfaces of the acceleration sensitive unit and the acceleration information processing module at the same time to achieve temperature control by setting up four radiator assemblies on the upper and lower sides of the acceleration sensitive unit and the acceleration information processing module, and the temperature control target point is designed to be the temperature when the device is started, that is, the startup temperature is the temperature control temperature, thereby achieving rapid temperature control within a wide temperature range; and the acceleration sensitive unit and the acceleration information processing module are temperature-controlled independently in separate cavities, thereby ensuring their temperature control accuracy.

[0020] Furthermore, the present invention has platinum resistance sensors attached to the heat sink assembly, acceleration sensitive unit and acceleration information processing module, which can monitor the temperatures of the TEC hot and cold surfaces of the heat sink assembly, the acceleration sensitive unit and the acceleration information processing module in real time and at multiple points, which is helpful for overall temperature perception and temperature control strategy adjustment.

[0021] Furthermore, the gaps in the acceleration sensitive unit and the acceleration information processing module of the present invention are filled with thermal conductive adhesive to reduce the heat capacity, following the minimum heat capacity design principle, so that the temperature field can be quickly stabilized and temperature control is easy to achieve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the instantaneous and stable acceleration measurement component temperature control device according to an embodiment of the present invention;

[0023] Figure 2 It is a schematic diagram of the decomposed structure of the instantaneous stable acceleration measurement component temperature control device according to an embodiment of the present invention;

[0024] Figure 3 is a schematic structural diagram of a radiator assembly according to an embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of the structure of an acceleration sensitive unit according to an embodiment of the present invention;

[0026] Figure 5 It is a cross-sectional view of the instantaneous stable acceleration measurement component temperature control device according to an embodiment of the present invention.

[0027] In the figure: 1-first radiator assembly; 11-fan; 12-heat sink; 13-first platinum resistance sensor; 14-first thermal pad; 15-second thermal pad; 16-TEC; 17-foam board; 18-second platinum resistance sensor; 19-heat exchange device; 2-second radiator assembly; 3-third radiator assembly; 4-fourth radiator assembly; 5-side wall insulation assembly; 6-acceleration sensitive unit; 61-flexible quartz accelerometer; 62-third thermal pad; 63-upper cover; 64-base; 7-acceleration information processing module; 8-installation base. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention 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 invention and are not used to limit the present invention.

[0029] like Figure 1 and Figure 2 As shown, in order to ensure the temperature control speed and accuracy, the present embodiment provides an instant and stable acceleration measurement component temperature control device, which includes, from top to bottom, a first radiator component 1 and a second radiator component 2, a side wall insulation component 5, an acceleration sensitive unit 6, an acceleration information processing module 7, a mounting base 8, a third radiator component 3 and a fourth radiator component 4.

[0030] Among them, the side wall insulation component is located outside the acceleration sensitive unit 6 and the acceleration information processing module 7, and the acceleration sensitive unit 6 and the acceleration information processing module 7 are separated in two cavities. The cavities are filled with foam boards around to isolate the disturbance of external environmental temperature changes; the bottom of the acceleration sensitive unit 6 and the acceleration information processing module 7 are embedded in the installation base 8.

[0031] The first radiator assembly 1 , the second radiator assembly 2 , the third radiator assembly 3 and the fourth radiator assembly 4 respectively contain heat exchange components at their bottoms.

[0032] In addition, the first radiator assembly 1 and the third radiator assembly 3 are respectively located on the upper and lower sides of the acceleration sensitive unit 6, and are respectively connected to the acceleration sensitive unit 6 through heat exchange devices; the second radiator assembly 2 and the fourth radiator assembly 4 are respectively located on the upper and lower sides of the acceleration information processing module 6, and are respectively connected to the acceleration information processing module 7 through heat exchange devices.

[0033] This embodiment sets up four radiator assemblies on the upper and lower sides of the acceleration sensitive unit 6 and the acceleration information processing module 7, which can heat or cool the upper and lower surfaces of the acceleration sensitive unit 6 and the acceleration information processing module 7 at the same time to achieve temperature control, and designs the temperature control target point to be the temperature when the device is started, that is, the startup temperature is the temperature control temperature, thereby achieving rapid temperature control within a wide temperature range; and the acceleration sensitive unit 6 and the acceleration information processing module 7 are temperature-controlled independently in separate cavities, thereby ensuring their temperature control accuracy.

[0034] The first radiator assembly 1, the second radiator assembly 2, the third radiator assembly 3 and the fourth radiator assembly 4 have similar structures. This embodiment takes the structure of the first radiator assembly 1 as an example for description. Figure 3As shown, it includes a fan 11, a heat sink 12, a first platinum resistor sensor 13, a first thermal pad 14, a second thermal pad 15, a TEC 16, a foam board 17, a second platinum resistor sensor 18 and a heat exchange device 19, wherein the TEC is a thermoelectric cooler, one end of which is a hot surface and the other end is a cold surface; wherein the first thermal pad 14 and the first platinum resistor sensor 13 are installed on the hot surface side of the TEC, the second thermal pad 15 and the second platinum resistor sensor 18 are installed on the cold surface side of the TEC, the first platinum resistor sensor 13 and the second platinum resistor sensor 18 are used to monitor the temperature of the hot and cold surfaces of the TEC, and the thermal pad is in full contact with the hot and cold surfaces of the TEC, and plays the role of heat conduction and protection of the TEC; the fan 11 and the heat sink 12 are located on the hot surface side of the TEC, and are used to dissipate the heat from the hot surface of the TEC, and the speed of the fan 11 is adjustable; the heat exchange device 19 is installed on the cold surface side of the TEC, and the heat exchange device 19 is the only temperature output port of the heat sink assembly, and its output temperature can be adjusted by the TEC 16; the foam board 17 is located around the heat exchange device 19, and is used to isolate external heat and resist external environmental interference.

[0035] The side wall insulation assembly 5 and the mounting base 8 are made of rigid materials with good thermal insulation performance, and have the functions of fixed support and thermal insulation; the heat exchange device 19 is made of a metal material with good thermal conductivity, and the foam board 17 is made of a material with good thermal insulation performance. In a preferred embodiment of the present invention, the heat exchange device 19 is specifically a pure copper block, and the foam board 17 is specifically a polyurethane foam board.

[0036] like Figure 4 As shown, the acceleration sensitive unit 6 includes a flexible quartz accelerometer 61, a third thermal pad 62, an upper cover 63, and a base 64; wherein the upper cover 63 and the base 64 are installed tightly together without a gap, thereby ensuring the overall thermal conductivity; the third thermal pad 62 is located on the bottom surface of the flexible quartz accelerometer 61, and is used to eliminate the installation gap between the base and the base, thereby ensuring good thermal conductivity between the two; the side surface of the flexible quartz accelerometer 61 is coated with thermal conductive silicone grease. In addition, platinum resistance sensors are attached to the bottom surface of the flexible quartz accelerometer 61, the bottom surface of the base 64, and the side surface of the base 64, for monitoring the temperature of the entire acceleration sensitive unit 6; the remaining gaps of the acceleration sensitive unit 6 are filled with thermal conductive glue.

[0037] All heat generating components in the acceleration information processing module 7 are designed to be attached to the shell, and the remaining gaps are filled with thermal conductive adhesive to reduce the heat capacity; platinum resistance sensors are attached to the upper and lower surfaces to monitor the temperature of the acceleration information processing module 7.

[0038] In this embodiment, platinum resistance sensors are attached to each heat sink assembly, acceleration sensitive unit 6 and acceleration information processing module 7, so that the temperatures of the TEC hot and cold surfaces of the heat sink assembly, the acceleration sensitive unit 6 and the acceleration information processing module 7 can be monitored in real time and at multiple points, which is helpful for overall temperature perception and temperature control strategy adjustment; and in this embodiment, the gaps in the acceleration sensitive unit 6 and the acceleration information processing module 7 are filled with thermal conductive glue to reduce the heat capacity, following the minimum heat capacity design principle, so that the temperature field can be quickly stabilized, and temperature control is easy to achieve.

[0039] In this embodiment, the acceleration sensing unit 6 and the acceleration information processing module 7 are temperature-controlled objects, and are located in two independent heat-insulating cavities, so that the temperature of the two can be controlled separately to reduce the temperature interference between each other. In addition, the heat exchange between the acceleration sensing unit 6 and the acceleration information processing module 7 and the outside world almost all comes from the heat exchange device connected to the radiator, and the rest of the heat exchange is very small. The temperature of the heat exchange device can be strictly controlled by TEC. Therefore, the boundary conditions of the temperature control system are close to being fully controllable, and it is insensitive to the temperature fluctuation of the external environment, and can achieve constant temperature control in a wide temperature range.

[0040] The cross-sectional structure diagram of the temperature control system described in this embodiment is as follows: Figure 5 As shown, the temperature control system of this embodiment has powerful cooling and heating capabilities. The first radiator assembly 1, the second radiator assembly 2, the third radiator assembly 3 and the fourth radiator assembly 4 can heat or cool the acceleration sensitive unit 6 and the acceleration information processing module 7 from the upper and lower surfaces respectively, and the acceleration sensitive unit 6 and the acceleration information processing module 7 follow the minimum thermal capacity design principle. When the TEC is working, the temperature field of the temperature-controlled object acceleration sensitive unit 6 and the acceleration information processing module 7 can respond quickly and reach a steady state. The internal temperature gradient is small, thereby realizing rapid temperature control within a wide temperature range. The temperature field temperature can reach an accuracy difference of 0.5% within 5 minutes.

[0041] In addition, this embodiment further provides a gravimeter, which uses the instant stable acceleration measurement component temperature control device described in this embodiment to control the temperature.

[0042] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, and two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0043] The order of execution of each step in the above embodiment does not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0044] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. An instant stable acceleration measurement component temperature control device, characterized in that: It includes, from top to bottom, a first radiator assembly and a second radiator assembly, a side wall insulation assembly, an acceleration sensitive unit, an acceleration information processing module, a mounting base, a third radiator assembly and a fourth radiator assembly; The side wall insulation component is located outside the acceleration sensitive unit and the acceleration information processing module, and separates the acceleration sensitive unit and the acceleration information processing module in two cavities; the bottom of the acceleration sensitive unit and the acceleration information processing module is embedded in the mounting base; The bottoms of the first radiator assembly, the second radiator assembly, the third radiator assembly and the fourth radiator assembly respectively contain heat exchange components; The first radiator assembly and the third radiator assembly are respectively located on the upper and lower sides of the acceleration sensitive unit, and are respectively connected to the acceleration sensitive unit through heat exchange devices; the second radiator assembly and the fourth radiator assembly are respectively located on the upper and lower sides of the acceleration information processing module, and are respectively connected to the acceleration information processing module through heat exchange devices.

2. The instantaneous stable acceleration measurement component temperature control device according to claim 1, characterized in that: The radiator assembly also includes a fan, a heat sink, a first thermal pad, a second thermal pad, a first platinum resistor sensor, a second platinum resistor sensor, a TEC, and a foam board, wherein the first thermal pad and the first platinum resistor sensor are installed on the hot side of the TEC, and the second thermal pad and the second platinum resistor sensor are installed on the cold side of the TEC; the fan and the heat sink are located on the hot side of the TEC, and the fan speed is adjustable; the foam board is located around the heat exchange device.

3. The instantaneous stable acceleration measurement component temperature control device according to claim 1, characterized in that: The acceleration sensitive unit includes a flexible quartz accelerometer, a third thermal pad, an upper cover, and a base; wherein the upper cover and the base are installed tightly without a gap; the third thermal pad is placed on the base and is located on the bottom surface of the flexible quartz accelerometer; and the side of the flexible quartz accelerometer is coated with thermal grease.

4. The instantaneous stable acceleration measurement component temperature control device according to claim 2 or 3, characterized in that: The upper and lower surfaces of the acceleration information processing module are respectively attached with platinum resistance sensors; the bottom surface of the flexible quartz accelerometer of the acceleration sensitive unit, the bottom surface of the base and the side surface of the base are respectively attached with platinum resistance sensors.

5. The instantaneous stable acceleration measurement component temperature control device according to claim 1 or 2, characterized in that: The heat exchange device is the only temperature output port of the radiator assembly. The output temperature of the heat exchange device can be regulated by TEC. The temperature of the acceleration sensitive unit and the acceleration information processing module is controlled by the output temperature of the heat exchange device.

6. The instantaneous stable acceleration measurement component temperature control device according to claim 2 or 3, characterized in that: The cavity of the side wall insulation component where the acceleration sensitive unit and the acceleration information processing module are located is filled with foam boards all around; the gap positions in the acceleration sensitive unit and the gap positions in the acceleration information processing module are filled with thermal conductive glue.

7. The instantaneous stable acceleration measurement component temperature control device according to claim 1, characterized in that: The side wall insulation assembly and the mounting base are made of a rigid material with good thermal insulation performance.

8. The instantaneous stable acceleration measurement component temperature control device according to claim 1, characterized in that: The heat exchange device is made of a metal material with good thermal conductivity.

9. The instantaneous stable acceleration measurement component temperature control device according to claim 6, characterized in that: The foam board is made of a material with good heat insulation performance.

10. A gravimeter, characterized in that: The gravimeter uses an instant stable acceleration measurement component temperature control device as described in any one of claims 1-9 to control the temperature.

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