High-precision thrust measuring device suitable for low-thrust ion engine

Abstract

The invention provides a high-precision thrust measuring device suitable for a low-thrust ion engine, and aims to solve the problem of insufficient precision of an existing thrust measuring device. The device comprises a bottom plate, and the bottom plate is provided with a force measuring sensor, a battery cabin, a circuit board cabin, a cabin cover and supporting legs. The top of the force transducer is provided with a stress disc used for bearing the thrust generated by the ion engine. The cross-shaped bottom plate structure is adopted, the high-sensitivity force measurement sensor is arranged at the end of the bottom plate, and the signal processing circuit is combined, so that the measurement stability and accuracy are effectively improved. The device is small in size and easy and convenient to install, and has important significance on application and development of the ion engine propelling technology.

Description

Technical Field

[0001] The invention belongs to the field of metering equipment, and in particular relates to a high-precision thrust measuring device suitable for a small-thrust ion engine. Background Art

[0002] Most of the existing thrust measurement devices for aerospace engines focus on the thrust measurement of rocket engines. They have a large measurement range but low measurement accuracy, and are rough measurement equipment. The thrust of ion engines used for satellite orbit change and attitude adjustment is generally in the range of 0.01N to 5N. Compared with rocket engines, the thrust measurement of ion engines belongs to the micro-measurement range, which requires higher force measurement accuracy and does not require a large range. Therefore, the existing thrust measurement devices cannot meet the thrust measurement needs of ion engines. Summary of the invention

[0003] The purpose of the present invention is to provide a high-precision thrust measurement device suitable for low-thrust ion engines, so as to overcome the defects of the existing devices, such as too large range and insufficient precision. The device achieves high-precision measurement within the micro-thrust range through modular design, precision sensor selection and optimized structural arrangement.

[0004] To achieve the above-mentioned purpose, the present invention provides a high-precision thrust measurement device suitable for a small-thrust ion engine, comprising a base plate, on which a force sensor, a battery compartment, a circuit board compartment, a hatch and support legs are arranged, and a force plate is arranged on the top of the force sensor to withstand the thrust generated by the ion engine. The present invention adopts an orthogonal cross-shaped base plate structure, and a high-sensitivity force sensor is arranged at the end of the base plate. The analog signal collected by the force sensor is converted into an accurate digital thrust value after analog-to-digital conversion, signal amplification and filtering. At the same time, the device adopts a lightweight design, with a compact overall structure, light weight, and easy integration into the ion engine system. Through the above-mentioned structure, high-precision thrust measurement of a small-thrust ion engine is achieved, which is of significant significance for promoting the technological development in this field. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 It is a front axonometric schematic diagram of the present invention; Figure 2 It is a rear axonometric schematic diagram of the present invention; Figure 3 It is a front cross-sectional view of the present invention; Figure 4 It is a schematic diagram of a force measurement working embodiment of the present invention; Description of reference numerals: 1. Base plate; 2. Force sensor; 3. Battery compartment; 4. Circuit board compartment; 5. Hatch cover; 6. Support legs; 7. Force plate; 8. Ion engine. DETAILED DESCRIPTION

[0006] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0007] Embodiment 1: See also Figure 1 , Figure 2 , Figure 3 The embodiment of the present invention provides an ion engine thrust measurement device, including a bottom plate 1, on which a force sensor 2, a battery compartment 3, a circuit board compartment 4, a hatch 5 and a support leg 6 are arranged, and a force plate 7 is arranged on the top of the force sensor to bear the thrust generated by the ion engine 8; the force sensor 2 is arranged at the end of the bottom plate 1, the battery compartment 3 and the circuit board compartment 4 are arranged in the middle, the hatch 5 is arranged at the middle position of the bottom, and the support 6 is arranged at the bottom near the end. The force plate 7 is arranged on the top of the sensor 2, and the ion engine 8 is installed on the force plate.

[0008] Embodiment 2: See also Figure 4 In the specific application of the present invention, the ion engine 8 is arranged on the force-bearing disk 7, and the reverse thrust generated by the ion engine 8 applies positive pressure to the force-bearing disk. Under the action of the positive pressure, the force sensor 2 outputs a pressure signal, which is converted into a specific pressure value and displayed on an external display device after data processing by the circuit board in the circuit board compartment. The battery in the battery compartment 3 is used to power the circuit board.

[0009] It should be understood by those skilled in the art that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above invention, and these changes or modifications are still within the scope of the present invention.

Claims

1. A high-precision thrust measurement device suitable for a small-thrust ion engine, characterized in that: It includes a base plate, on which are arranged a force sensor, a battery compartment, a circuit board compartment, a compartment cover and supporting legs; the force sensor is installed on the top of the base plate and is connected to the ion engine through a force plate to withstand and measure the thrust generated by the ion engine.

2. The thrust measuring device according to claim 1, characterized in that: The base plate is an orthogonal cross-shaped structure, with force sensors disposed at the four ends, a battery compartment and a circuit board compartment disposed at the central intersection, and support legs disposed at the bottom near the ends to ensure the stability of the overall structure.

3. The thrust measuring device according to claim 1, characterized in that: The top of the force sensor is fixedly connected to the force plate, and the bottom is fixedly connected to the bottom plate, so as to accurately collect the thrust signal of the ion engine.

4. The thrust measuring device according to claim 1, characterized in that: A lithium battery is arranged in the battery compartment, and the lithium battery provides electrical energy to the circuit board in the circuit board compartment.

5. The thrust measurement device according to claim 1, characterized in that: A circuit board is arranged in the circuit board compartment, and the circuit board is used to receive the analog signal collected by the force sensor and perform analog-to-digital conversion, signal amplification and filtering, and output the converted data.

6. The thrust measurement device according to claim 1, characterized in that: The battery compartment and the circuit board compartment are provided with screw holes around their exteriors for installing compartment covers to protect internal components.

7. The thrust measurement device according to claim 1, characterized in that: The hatch cover is a disc structure, which is arranged at the bottom of the battery compartment and the circuit board compartment, and is used to support the batteries and circuit boards placed in the battery compartment and the circuit board compartment. The hatch cover is fixedly connected to the bottom plate by screws.

8. The ion engine thrust measurement device according to claim 1, characterized in that: The force bearing plate is a circular ring structure, and is provided with mounting holes for mounting the ion engine and the force sensor.

Images