CN107420381B - A kind of caliberating device of servo valve temperature screen system - Google Patents

Abstract

The invention discloses a calibration device for a servo valve temperature screen system, which includes a calibration box and a multimeter; the calibration box is provided with an aviation plug connected to an industrial computer, Vin+ port, Vin-port, Vout+ port, Vout-port, R+ port, R ‑port, I+ port, I‑port and the knob for adjusting resistance; there is a sliding rheostat inside the calibration box; Vin+ port and Vin‑port are connected to the output port of the industrial computer; Vout+ port and Vout‑port can be connected to the voltage range of the multimeter; The Vout+ port and Vout‑port are respectively connected in parallel with the Vin+ port and Vin‑port inside the calibration box and connected to the aviation plug through the following circuit; the R+ port and the R‑port can be connected to the resistance file of the multimeter; the I+ port and the I‑port can be connected to the multimeter’s Current file; R+ port and a fixed end of the sliding rheostat are connected in parallel to the aviation plug in parallel with the I-port inside the calibration box, and the R-port and I+ port are connected in parallel to the sliding end of the sliding rheostat inside the calibration box. The calibration method of the invention is simple and easy to operate.

Description

A calibration device for a servo valve temperature screen system

technical field

The present invention relates to voltage and current sensing. More specifically, it relates to a calibration device for a servo valve temperature screen system.

Background technique

The servo valve temperature screen system includes an industrial computer and a hydraulic system. The industrial computer outputs electrical signals to control the hydraulic system. Since the aerospace servo valve needs to work for a long time and at high frequency, it is necessary to control the output voltage and the output voltage of the industrial computer in the servo valve temperature screen system. The current is calibrated to meet the precise operation of aerospace servo valves. The calibration device of the existing servo valve temperature screen system needs to set up the servo valve and related hydraulic system in the actual work, and the calibration can only be performed under the condition of an external power supply, and the current at both ends of the servo valve is not easy to measure, which brings great difficulties to the calibration work. Great inconvenience.

Therefore, it is necessary to provide a calibration device that can replace the existing hydraulic system and can calibrate the servo valve temperature screen system at any time.

Contents of the invention

The purpose of the present invention is to provide a calibration device for a servo valve temperature screen system.

To achieve the above object, the present invention adopts the following technical solutions:

A calibration device for a servo valve temperature screen system, including a calibration box and a multimeter;

The calibration box is equipped with an aviation plug connected to the industrial computer in the servo valve temperature screen system, which is used for two-way signal transmission between the calibration box and the industrial computer; there is a sliding rheostat inside the calibration box; the calibration box is also equipped with Vin+ port and Vin- port , Vout+ port, Vout- port, R+ port, R- port, I+ port, I- port and the knob for adjusting the resistance of the sliding rheostat;

Vin+ port and Vin- port are connected to the output port of the industrial computer to receive the output voltage signal of the industrial computer; Vout+ port and Vout- port can be connected to the voltage range of the multimeter; Vout+ port and Vout- port are respectively connected with Vin+ port and Vin- port in calibration The inside of the box is connected in parallel to one end of the following circuit, and the other end of the following circuit is connected to the aviation plug;

The R+ port and R- port can be connected to the resistance file of the multimeter; the I+ port and I- port can be connected to the current file of the multimeter; the parallel circuit between the R+ port and a fixed end of the sliding rheostat inside the calibration box is connected to the I- port inside the calibration box Parallel connection to the aviation plug, R- port and I+ port are connected in parallel to the sliding end of the sliding rheostat inside the calibration box.

Preferably, the multimeter is a benchtop multimeter.

Preferably, the follower circuit is an analog circuit of the hydraulic system in the servo valve temperature screen system.

The beneficial effects of the present invention are as follows:

The technical scheme of the present invention replaces the existing servo valve and its hydraulic system in actual work, can simulate the real working state, and calibrate the output voltage and current of the industrial computer. Calibrate the output voltage and current of the industrial computer under the condition of existence. Further, the technical solution of the present invention has flexible assembly and disassembly methods, strong working flexibility and convenient operation.

Description of drawings

Below in conjunction with accompanying drawing, specific embodiment of the present invention is described in further detail;

Fig. 1 shows the internal structure diagram of the calibration box in the calibration device of the servo valve temperature screen system.

Fig. 2 shows the voltage calibration connection diagram of the calibration device of the servo valve temperature screen system.

Fig. 3 shows the resistance setting connection diagram of the calibration device of the servo valve temperature screen system.

Fig. 4 shows the current calibration connection diagram of the calibration device of the servo valve temperature screen system.

Detailed ways

In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

The calibration device of the servo valve temperature screen system disclosed by the present invention includes a calibration box and a multimeter, and the multimeter is a desktop multimeter;

As shown in Figure 1, the rear end of the calibration box is provided with an aviation plug 1 connected to the industrial computer in the servo valve temperature screen system, which is used for two-way signal transmission between the calibration box and the industrial computer; there is a sliding rheostat 2 inside the calibration box , the front end of the calibration box is equipped with eight ports in the form of jacks and a knob for adjusting the resistance of the sliding rheostat 2. The eight ports in the form of jacks include Vin+ port, Vin- port, Vout+ port, Vout- port, R+ port, R-port, I+port and I-port;

The Vin+ port and Vin- port can be connected to the output port of the industrial computer to receive the output voltage signal of the industrial computer; the Vout+ port and the Vout- port can be connected to the voltage file of the desktop multimeter; the Vout+ port and the Vout- port are respectively connected to the Vin+ port and the Vin- port In the calibration box, it is connected in parallel to one end of a follower circuit, and the other end of the follower circuit is connected to the aviation plug 1, which can realize the calibration of multiple detection signals. The follower circuit is an analog circuit of the hydraulic system in the servo valve temperature screen system; when Vin+ When the port and Vin- port are connected to the output port of the industrial computer and the Vout+ port and Vout- port are connected to the voltage range of the desktop multimeter, the output voltage of the industrial computer passing through the following circuit is detected through the reading of the voltage file of the desktop multimeter, and the industrial computer passes through the aviation plug. 1 Receive the output voltage of the industrial computer through the follower circuit and detect the output voltage value of the industrial computer through the follower circuit, and obtain the output voltage value of the industrial computer through the follower circuit according to the reading of the voltage file of the desktop multimeter and the detection of the industrial computer To calibrate the output voltage of the industrial computer;

The R+ port and R- port can be connected to the resistance file of the desktop multimeter to accurately set the resistance value, and the analog impedance is used as a fixed value; the I+ port and I- port can be connected to the current file of the desktop multimeter; the R+ port and the sliding rheostat 2 A parallel circuit with a fixed end inside the calibration box is connected to the aviation plug 1 in parallel with the I- port inside the calibration box, and the R- port and I+ port are connected in parallel to the sliding end of the sliding rheostat 2 inside the calibration box; when the R+ port and the R- port When connecting the resistance gear of the desktop multimeter, adjust the resistance value of the sliding rheostat 2 through the knob of the calibration box, and display the resistance value through the desktop multimeter; when the I+ port and I- port are connected to the current gear of the desktop multimeter, the current through the desktop multimeter The reading of the file detects the output current of the industrial computer passing through the sliding rheostat 2. The industrial computer receives the output current of the industrial computer passing through the sliding rheostat 2 through the aviation plug 1 and detects the value of the output current of the industrial computer passing through the sliding rheostat 2. According to the desktop multimeter The reading of the current file and the value of the output current of the industrial computer through the sliding rheostat 2 detected by the industrial computer are used to calibrate the output current of the industrial computer.

As shown in Figure 2, when calibrating the output voltage of the industrial computer, the Vin+ port and Vin- port of the calibration box are respectively connected to the output port of the industrial computer, and the Vout+ port and Vout- port of the calibration box are respectively connected to the VΩ of the voltage range of the desktop multimeter port and COM port.

As shown in Figure 3, when setting the resistance value of the sliding rheostat 2, the R+ port and R- port of the calibration box are respectively connected to the VΩ port and the COM port of the resistance gear of the desktop multimeter; as shown in Figure 4, when calibrating the industrial computer When outputting current, the I+ port and I- port of the calibration box are respectively connected to the 100mA port and the COM port of the current range of the desktop multimeter.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those of ordinary skill in the art can also make It is impossible to exhaustively list all the implementation modes here, and any obvious changes or changes derived from the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims (3)

1. a kind of caliberating device of servo valve temperature screen system, which includes Calibration Box and multimeter, which is characterized in that

Calibration Box is equipped with the aviation plug connecting with the industrial personal computer in servo valve temperature screen system, pair for Calibration Box and industrial personal computer It is transmitted to signal；Slide rheostat is equipped with inside Calibration Box；Calibration Box be additionally provided with the port Vin+, the port Vin-, the port Vout+, The port Vout-, the port R+, the port R-, the port I+, the port I- and adjust slide rheostat resistance value knob；

The port Vin+ connects the output port of industrial personal computer with the port Vin-, receives the voltage signal of industrial personal computer output；The port Vout+ The voltage gear of multimeter can be connected with the port Vout-；The port Vout+ and the port Vout- respectively with the port Vin+ and the port Vin- In Calibration Box internal parallel to the one end for following circuit, this follows the other end of circuit to connect aviation plug；

The port R+ and the port R- can connect the resistance grade of multimeter；The port I+ and the port I- can connect the current gear of multimeter；R+ Parallel circuit of one fixing end of port and slide rheostat inside Calibration Box is connected in parallel to inside Calibration Box with the port I- The sliding end of aviation plug, the port R- and the port I+ in Calibration Box internal parallel to slide rheostat.

2. the caliberating device of servo valve temperature screen system according to claim 1, which is characterized in that the multimeter is desk-top Multimeter.

3. the caliberating device of servo valve temperature screen system according to claim 1, which is characterized in that described to follow circuit to watch Take the analog circuit of hydraulic system in valve temperature screen system.