阅读说明：本技术 一种回旋行波管灯丝的热测预处理及贮存监测系统 (Thermal measurement pretreatment and storage monitoring system for filament of gyrotron traveling wave tube ) 是由 鄢然 康有鲜 周康 刘林 高文琪 刘佳明 于 2021-06-23 设计创作，主要内容包括：本发明公开了一种回旋行波管灯丝的热测预处理及贮存监测系统,属于微波、毫米波电真空器件技术领域。该系统包括PC客户端、可编程逻辑控制器(PLC)、钛泵电源、程控恒流模块、多路导轨式继电器；通过PC客户端与PLC和钛泵电源的交互,实现回旋行波管热测的预处理以及贮存监测的半自动化流程；在暂无电源发射机可使用时,可提前将行波管使用本发明系统系统进行热测前的准备,节约了大量时间和繁琐工序,在灯丝烘烤结束后可将行波管直接装载至电源发射机上进行热测试。并且,待热测结束后,使用本发明系统贮存时能够方便快捷的对灯丝进行定期的烘烤,以保证行波管在后期再次使用时功能地完整性。(The invention discloses a thermal measurement preprocessing and storage monitoring system for a filament of a gyrotron traveling wave tube, and belongs to the technical field of microwave and millimeter wave electric vacuum devices. The system comprises a PC client, a Programmable Logic Controller (PLC), a titanium pump power supply, a program-controlled constant-current module and a multi-channel guide rail type relay; the semi-automatic process of pretreatment of the thermal measurement and storage monitoring of the gyrotron traveling wave tube is realized through the interaction of a PC client and a PLC and a titanium pump power supply; when the power supply transmitter is not used temporarily, the traveling wave tube can be prepared in advance before thermal testing by using the system, so that a large amount of time and complicated procedures are saved, and the traveling wave tube can be directly loaded on the power supply transmitter for thermal testing after the filament is baked. And after the thermal measurement is finished, the filament can be conveniently and quickly baked regularly when the system is used for storage, so that the functional integrity of the traveling wave tube is ensured when the traveling wave tube is reused at a later stage.)

1. A thermal measurement preprocessing and storage monitoring system for a filament of a gyrotron traveling wave tube comprises a PC client, a programmable logic controller, a titanium pump power supply, a program-controlled constant-current module and a multi-channel guide rail type relay;

the PC client is connected with the programmable logic controller and the titanium pump power supply through the switch, acquires filament current data of the programmable logic controller and titanium pump voltage current data of the titanium pump power supply, performs visual processing on the acquired data, and monitors the states of the filament and the titanium pump in real time; meanwhile, a titanium pump abnormal coefficient threshold value is set, when the acquired titanium pump voltage and current data exceed the titanium pump abnormal coefficient threshold value, the PC client sends an instruction to the programmable logic controller to control the program-controlled constant-current module to close current output so as to protect the traveling wave tube;

the programmable logic controller is used for controlling the start of the program-controlled constant current module and adjusting the output current of the program-controlled constant current module; meanwhile, filament current data of the traveling wave tube are fed back to the PC client;

the programmable logic controller is also used for controlling a plurality of guide rail type relays which are arranged in parallel, one guide rail type relay is connected with one gyrotron traveling wave tube, and different guide rail type relays are selected and conducted at a PC client side to electrify the corresponding traveling wave tube and the program-controlled constant current module so as to realize periodic filament baking operation;

and the titanium pump power supply is used for supplying power to the titanium pump on the traveling wave tube and feeding back voltage and current data of the titanium pump to the PC client.

2. The system for thermal preprocessing and storage monitoring of a filament of a gyrotron traveling wave tube according to claim 1, wherein the PC client stores all collected data for later inspection.

Technical Field

The invention belongs to the technical field of microwave and millimeter wave electro-vacuum devices, and relates to necessary links of pretreatment, storage and display treatment of an automatic thermal measurement system of a high-power millimeter wave gyrotron traveling wave tube.

Background

The mainstream gyrotron traveling wave tube in the high-power millimeter wave device is an important high-power millimeter wave source. The broadband high-power civil communication.

Through development for many years, the thermal testing link of the gyrotron traveling wave tube is mature, a filament of the traveling wave tube is used for heating a cathode of the traveling wave tube, a proper cathode working temperature is provided, fluctuation of emitted electrons is prevented, before thermal testing, constant-current power supply is needed to be conducted on the filament part of the gyrotron traveling wave tube, power supply of a titanium pump is needed to be conducted on the filament part of the gyrotron traveling wave tube, filament baking for 72 hours is conducted, the internal vacuum degree of the tube is detected, and air is exhausted. In addition, the gyrotron traveling wave tube after the test is finished needs to be periodically baked by the filament in the storage room, so that the functional reliability of the traveling wave tube is ensured. However, the existing conditions do not satisfy the simultaneous filament baking of the gyrotron traveling wave tube in the storage chamber and the real-time monitoring of the vacuum degree in the traveling wave tube. Therefore, how to make the procedure before the thermal measurement easier and save time and ensure the integrity of the function of the traveling wave tube during storage is a critical problem.

Disclosure of Invention

The problem that convenience and timeliness of engineering before and after thermal measurement of the gyrotron traveling wave tube are insufficient in the prior art is solved. The invention provides a thermal testing pretreatment and storage monitoring system for a filament of a gyrotron traveling wave tube, which enables the traveling wave tube to finish the preparation work before thermal testing without delaying the use of a testing platform on a transmitter; and after the test is finished, the filament is automatically subjected to periodic baking detection and the state of the traveling wave tube is monitored.

The technical scheme adopted by the invention is as follows:

a thermal measurement preprocessing and storage monitoring system for a filament of a gyrotron traveling wave tube comprises a PC client, a Programmable Logic Controller (PLC), a titanium pump power supply, a program-controlled constant-current module and a multi-channel guide rail type relay.

The PC client is connected with a Programmable Logic Controller (PLC) and a titanium pump power supply through a switch, acquires filament current data of the PLC and titanium pump voltage current data of the titanium pump power supply, performs visual processing on the acquired data, and monitors the states of a filament and a titanium pump in real time; and meanwhile, a titanium pump abnormal coefficient threshold value is set, when the acquired titanium pump voltage and current data exceed the titanium pump abnormal coefficient threshold value, the PC client sends an instruction to a Programmable Logic Controller (PLC) to control the program-controlled constant current module to close current output so as to protect the traveling wave tube.

The Programmable Logic Controller (PLC) is used for controlling the start of the program-controlled constant current module and adjusting the output current of the program-controlled constant current module; and meanwhile, filament current data of the traveling wave tube is fed back to the PC client.

The Programmable Logic Controller (PLC) is also used for controlling a plurality of guide rail type relays which are arranged in parallel, one guide rail type relay is connected with one gyrotron traveling wave tube, and different guide rail type relays are selected to be switched on at a PC client side, so that the corresponding traveling wave tube and the program-controlled constant current module are electrified, and the periodic filament baking operation is realized.

And the titanium pump power supply is used for supplying power to the titanium pump on the traveling wave tube and feeding voltage and current data of the titanium pump back to the PC client.

Furthermore, the PC client stores all the collected data, so that later-stage examination is facilitated.

The beneficial results of the invention are as follows:

through the interaction of the PC client and the PLC and the titanium pump power supply, the semi-automatic process of the pretreatment and storage monitoring of the thermal measurement of the gyrotron traveling wave tube is realized. When the power supply transmitter is not used temporarily, the traveling wave tube can be prepared in advance before thermal testing by using the system, so that a large amount of time and complicated procedures are saved, and the traveling wave tube can be directly loaded on the power supply transmitter for thermal testing after the filament is baked. And after the thermal measurement is finished, the filament can be conveniently and quickly baked regularly when the system is used for storage, so that the functional integrity of the traveling wave tube is ensured when the traveling wave tube is reused at a later stage.

According to the traditional method, a constant current source is connected to a filament part of the traveling wave tube, the output current is manually adjusted, the traveling wave tube is electrified and baked, the operation is single, the safety is not realized, the state of the traveling wave tube cannot be known, a protection means is not provided to prevent the traveling wave tube from being damaged when the traveling wave tube is not monitored by people, and the parameters of the traveling wave tube cannot be checked in the baking process. Compared with the traditional filament baking mode, the system disclosed by the invention is small in volume and simple to operate, reduces dangerous operation possibly brought by actual manual operation, simplifies the filament baking operation process, and is more convenient and quicker. When data are found to be abnormal in the baking process, the program-controlled constant current module can be automatically disconnected in time to output current, so that the traveling wave tube is protected. And the data in the baking process can be stored, so that the data can be checked at a later period, and abnormal points of the data can be found.

Drawings

FIG. 1 is a schematic diagram of the logical connection of the system of the present invention.

FIG. 2 is a diagram of data acquisition by the host computer.

FIG. 3 is a protection diagram when data has an error.

FIG. 4 is a diagram of a later data display.

The reference numbers illustrate: 1. PC customer end, 2, switch, 3, PLC, 4, titanium pump power, 5, programme-controlled constant current module, 6, guide tracked relay.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples.

As shown in fig. 1, the PLC and the titanium pump power supply are connected to the PC through the switch. The PC serves as a client, the PLC and the titanium pump power supply serve as a server, the PC client sends a connection request, and after the connection is successful, the PLC and the titanium pump power supply can continuously perform data feedback. And the PC client acquires all data, and performs visualization processing on the received data through a LabWindows/CVI manufacturing upper computer. Meanwhile, the PC client side is provided with a titanium pump abnormal coefficient threshold value, and when the titanium pump voltage and current data fed back to the PC client side by the titanium pump power supply exceed the titanium pump abnormal coefficient threshold value, the PC client side sends an instruction to a Programmable Logic Controller (PLC) to control the program-controlled constant-current module to close current output so as to protect the traveling wave tube.

And the PLC is connected with the program-controlled constant-current module through an RS485 interface. In the PLC, a communication program and a corresponding control instruction with the program-controlled constant current module are compiled, and an instruction for controlling the target current output by the PC client is transmitted to the program-controlled constant current module, so that the aim of outputting an expected current value is fulfilled. In view of the magnitude of the actual working current of the gyrotron traveling wave tube, the filament baking current value is generally 60% of the working current, namely the maximum output current of the program control constant current module is 8A, and the filament baking requirement can be met. The basic parameters and the structural dimensions of the program-controlled constant-current module are as follows:

categories	Minimum size	Maximum of	Description of the invention
				Input power supply voltage (V)	12	45
Input power supply current (A)	5	20
				Output maximum rated current (A)	0.05	8
Output protection threshold current		8.3
				Communication mode			Standard RS485 RTU protocol
Size (mm)			Length 127 x width 100 x height 27

TABLE 1 PROGRAM-CONTROLLED CONSTANT-CURRENT MODULE BASE PARAMETERS AND STRUCTURE SIZE TABLE

And meanwhile, at the PLC end, the actual value of the output current is continuously fed back to the PC client side and is subjected to visual processing.

Furthermore, a PLC control port is connected with the multi-channel guide rail type relay, and the conducting state of the guide rail type relay is changed in a mode of outputting high level. The two ends of the guide rail type relay which can be conducted connect the program-controlled constant current module with the traveling wave tube, and the PC client controls the conduction of different guide rail relays, so that the program-controlled constant current module supplies power to different traveling wave tubes. The basic parameters and the structural dimensions of the guide rail relay in the embodiment are as follows:

TABLE 2 guide-type Relay basic parameter and Structure dimension Table

Fig. 2 is a diagram of a PC client, in which an IP address of a PLC is set as a local area network address, the PC client is also set as the same local area network address, then the PC client performs request communication with a PLC server via a TCP communication protocol, after connection is successful, the PLC performs data interaction with a program-controlled constant current module to control the program-controlled constant current module to achieve the purpose of outputting a target current, and the PLC also continuously transmits current data to the PC client, which analyzes the data and draws a current graph.

Meanwhile, the titanium pump power supply is also used as a server side, an IP address is set in a local area network, a PC client side sends a connection request through a TCP communication protocol, after connection is completed, the titanium pump power supply can continuously send data to the PC client side, and the PC client side obtains a data valid bit to enable the titanium pump current and the titanium pump voltage data to be displayed on the PC client side.

Fig. 3 is a protection flow during data error, when an abnormality such as an unstable internal structure occurs in the traveling wave tube, or the current of the titanium pump increases suddenly due to factors such as ambient humidity, the protection operation is required at this time. The titanium pump current value returned by the titanium pump power supply is compared with a set abnormal coefficient threshold value, if the actual current value is larger than a set safety value, an overcurrent phenomenon occurs, the PC client side immediately controls the program-controlled constant current module to close the output of the current, the overcurrent phenomenon is prompted on the PC client side, and the output current of the program-controlled constant current module can be recovered after the safety of people is checked.

Fig. 4 is a diagram showing the later data, the received data is stored in the form of Comma Separated Value (CSV) on Excel on the PC client, the filament current and titanium pump voltage data are periodically stored by the PC client through a timer, and the time of recording each piece of data is added, so as to view the data later. It can be seen that when the current of the titanium pump suddenly increases and exceeds the set safety threshold, the current of the filament is instantly reduced, and the protection mechanism is started. The state of the traveling wave tube during testing can be well shown by the fluctuation of the image data.