Electrometer system for weak current acquisition

Abstract

The utility model relates to the technical field of electrometers, and discloses an electrometer system for weak current acquisition, which comprises an electrometer main body, a wiring hole is fixedly arranged at a wiring end of the electrometer main body, a support leg is fixedly arranged at the lower end of the electrometer main body, a main board is arranged in the electrometer main body, and the main board is connected with the support leg. A shielding mechanism is installed on the main board, the shielding mechanism comprises an electromagnetic shielding cover, a shielding cavity and a shielding top plate, and the electromagnetic shielding cover is installed on the main board. According to the electrometer system for weak current collection, through the electromagnetic shielding cover, the shielding cavity and the shielding top plate arranged on the shielding mechanism, all electronic elements on the mainboard are installed in the shielding cavity in the electromagnetic shielding cover, and interference of external electromagnetism on work of the electrometer can be shielded through the electromagnetic shielding cover; the shielding cavity can resist electromagnetic interference and avoid mutual interference between electronic elements during working, and the measurement precision of the electrometer system for weak current acquisition is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrometers, in particular to an electrometer system for weak current acquisition. Background Technique

[0002] An electrometer is an instrument used to measure the radiation dose of radioactive substances. It is widely used in the research and application of ionizing radiation and is a special instrument for measuring the irradiation dose of X-rays or γ-rays.

[0003] An electrometer is used to measure weak current signals. It converts tiny electrical signals into conventionally measurable electrical signals. Since the electrical signals processed by the electrometer are extremely small and are easily interfered with, a special low-noise double-shielded cable is required to introduce them into the electrometer. At the same time, the environment where the electrometer itself is located must be clean, dry, and have good electromagnetic shielding to maintain a high input impedance, reduce electromagnetic interference, ensure a low and stable background current, and avoid a decrease in input impedance caused by dust and moisture. When the existing electrometers are in use, the electronic components may interfere with each other during operation, affecting the accuracy of the electrometer. Content of the Utility Model

[0004] The purpose of the utility model is to provide an electrometer system for weak current acquisition to solve the problem that when the existing electrometers are in use, the electronic components may interfere with each other during operation, affecting the accuracy of the electrometer as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An electrometer system for weak current acquisition, including an electrometer main body, a wiring hole is fixedly arranged at the wiring end of the electrometer main body, a support foot is fixedly installed at the lower end of the electrometer main body, a main board is installed inside the electrometer main body, and a shielding mechanism is installed on the main board;

[0006] Preferably, the shielding mechanism includes an electromagnetic shielding cover, a shielding cavity, and a shielding top plate. An electromagnetic shielding cover is installed on the main board, several shielding cavities are fixedly arranged on the electromagnetic shielding cover, and a shielding top plate is movably installed on the electromagnetic shielding cover.

[0007] Preferably, the materials of the electromagnetic shielding cover and the shielding top plate are aluminum, and the number of shielding cavities is the same as the number of electronic components on the main board.

[0008] Preferably, a fixing screw is threadedly connected to the shielding top plate, and several heat dissipation holes are fixedly arranged at the outer end of the electrometer main body.

[0009] Preferably, a charging port is fixedly arranged at the right end of the electrometer main body, and a control button is arranged on one side of the charging port.

[0010] Preferably, a triple filter is installed on the main board, a power supply module is installed on one side of the triple filter, and a control module is installed on one side of the power supply module.

[0011] Preferably, a high-voltage module is installed on one side of the control module, a detection module I is installed on one side of the high-voltage module, and a detection module II is installed on one side of the detection module I.

[0012] Preferably, all the electronic components on the main board are installed inside the shielding cavity.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. For the electrometer system for weak current collection, through the electromagnetic shielding cover, shielding cavity and shielding top plate provided by the shielding mechanism, each electronic component on the main board is installed in the shielding cavity on the electromagnetic shielding cover. The electromagnetic shielding cover can shield the interference of external electromagnetic fields on the operation of the electrometer, and the shielding cavity can resist electromagnetic interference to avoid mutual interference between electronic components during operation, improving the measurement accuracy of the electrometer system for weak current collection;

[0015] 2. For the electrometer system for weak current collection, the heat dissipation effect of the electrometer is improved through several heat dissipation holes provided at the outer end of the electrometer body, avoiding damage to the internal electronic components of the electrometer caused by long-term use. The setting of the feet can keep the electrometer away from the ground, reducing the risk of the electrometer getting damp and improving the use effect of the electrometer system for weak current collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 2 is a partial structural schematic diagram of the present utility model;

[0018] Figure 3 is a side view structural schematic diagram of the present utility model;

[0019] Figure 4 is an internal structural schematic diagram of the present utility model.

[0020] In the figure: 1. Electrometer body; 2. Wiring hole; 3. Foot; 4. Main board; 5. Electromagnetic shielding cover; 6. Shielding cavity; 7. Shielding top plate; 8. Fixing screw; 9. Heat dissipation hole; 10. Charging port; 11. Control button; 12. Triple filter; 13. Power supply module; 14. Control module; 15. High-voltage module; 16. Detection module I; 17. Detection module II. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1 - 4 , the present utility model provides a technical solution:

[0023] An electrometer system for weak current acquisition, including an electrometer main body 1, a wiring hole 2 is fixedly arranged at the wiring end of the electrometer main body 1, a support foot 3 is fixedly installed at the lower end of the electrometer main body 1, a main board 4 is installed inside the electrometer main body 1, and a shielding mechanism is installed on the main board 4.

[0024] In this embodiment, preferably, the shielding mechanism includes an electromagnetic shielding cover 5, a shielding cavity 6 and a shielding top plate 7. An electromagnetic shielding cover 5 is installed on the main board 4, several shielding cavities 6 are fixedly arranged on the electromagnetic shielding cover 5, and a shielding top plate 7 is movably installed on the electromagnetic shielding cover 5.

[0025] In this embodiment, preferably, the materials of the electromagnetic shielding cover 5 and the shielding top plate 7 are aluminum, and the number of shielding cavities 6 is the same as the number of electronic components on the main board 4.

[0026] In this embodiment, preferably, a fixing screw 8 is threadedly connected to the shielding top plate 7, and several heat dissipation holes 9 are fixedly arranged at the outer end of the electrometer main body 1.

[0027] In this embodiment, preferably, a charging port 10 is fixedly arranged at the right end of the electrometer main body 1, and a control button 11 is arranged on one side of the charging port 10.

[0028] In this embodiment, preferably, a three-in-one filter 12 is installed on the main board 4, a power supply module 13 is installed on one side of the three-in-one filter 12, and a control module 14 is installed on one side of the power supply module 13.

[0029] In this embodiment, preferably, a high-voltage module 15 is installed on one side of the control module 14, a detection module one 16 is installed on one side of the high-voltage module 15, and a detection module two 17 is installed on one side of the detection module one 16.

[0030] In this embodiment, preferably, the electronic components on the main board 4 are all installed inside the shielding cavity 6.

[0031] When the electrometer system for weak current acquisition in this embodiment is in use, through the electromagnetic shielding cover 5, shielding cavity 6 and shielding top plate 7 provided by the shielding mechanism, each electronic component on the main board 4 is installed in the shielding cavity 6 on the electromagnetic shielding cover 5. The electromagnetic shielding cover 5 can shield the interference of external electromagnetic fields on the operation of the electrometer, and the shielding cavity 6 can resist electromagnetic interference to avoid mutual interference between electronic components during operation. When the electrometer is in use, it is connected to the detector through the wiring hole 2. The high-voltage module 15 outputs the working voltage to the detector through the electrometer system. The current signal is collected through the detection module one 16 and the detection module two 17. Finally, functions such as signal acquisition, analog-to-digital conversion, communication control, and data storage are realized through the control module 14, so as to perform measurement. The heat dissipation effect of the electrometer is improved by several heat dissipation holes 9 provided at the outer end of the electrometer body 1, avoiding damage to the internal electronic components of the electrometer caused by too long use time. The setting of the support feet 3 can keep the electrometer away from the ground and reduce the risk of the electrometer being affected by moisture.

[0032] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the protection scope of the present invention. Any simple modification or equivalent replacement of the technical solution of the present invention by those of ordinary skill in the art shall not depart from the essence and scope of the technical solution of the present invention.

Claims

1. An electrometer system for weak current acquisition, comprising an electrometer main body (1), characterized in that: The connection terminal of the electrometer main body (1) is fixedly provided with a connection hole (2). The lower end of the electrometer main body (1) is fixedly installed with a support leg (3). A main board (4) is installed inside the electrometer main body (1), and a shielding mechanism is installed on the main board (4). The shielding mechanism includes an electromagnetic shielding cover (5), a shielding cavity (6), and a shielding top plate (7). The electromagnetic shielding cover (5) is installed on the main board (4). A plurality of shielding cavities (6) are fixedly provided on the electromagnetic shielding cover (5). The shielding top plate (7) is movably installed on the electromagnetic shielding cover (5).

2. The electrometer system for weak current acquisition according to claim 1, wherein: The materials of the electromagnetic shielding cover (5) and the shielding top plate (7) are aluminum. The number of shielding cavities (6) is the same as the number of electronic components on the main board (4).

3. The electrometer system for weak current acquisition according to claim 2, characterized in that: A fixing screw (8) is threadedly connected to the shielding top plate (7). A plurality of heat dissipation holes (9) are fixedly provided on the outer end of the electrometer main body (1).

4. The electrometer system for weak current acquisition according to claim 3, characterized in that: A charging port (10) is fixedly provided on the right end of the electrometer main body (1). A control button (11) is provided on one side of the charging port (10).

5. The electrometer system for weak current acquisition according to claim 4, characterized in that: A three-in-one filter (12) is installed on the main board (4). A power supply module (13) is installed on one side of the three-in-one filter (12). A control module (14) is installed on one side of the power supply module (13).

6. The electrometer system for weak current acquisition according to claim 5, wherein: A high-voltage module (15) is installed on one side of the control module (14). A first detection module (16) is installed on one side of the high-voltage module (15). A second detection module (17) is installed on one side of the first detection module (16).

7. An electrometer system for weak current acquisition according to claim 6, characterized in that: All the electronic components on the main board (4) are installed inside the shielding cavity (6).

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