A distributed measurement system for high altitude simulation test of engine

Abstract

The application relates to an engine high-altitude simulation test, and aims to solve the problems of high laying cost of a cable connection mode in the existing test and the inability to guarantee the stability of system transmission, and provides a distributed measurement system for the engine high-altitude simulation test, which comprises a front-end test system, a relay point and a rear-end measurement and control center, the front-end test system comprises a plurality of sensors, at least one collector and a power supply assembly, the collector is a multichannel collector, and each channel is connected with one sensor; the power supply end of each sensor is connected with the positive pole of the power supply assembly through a cable; the signal end of the sensor is connected with the signal input positive end of the corresponding channel of the collector through a cable; the signal input negative end of the corresponding channel of the collector is connected with the negative pole of the power supply assembly through a cable; the communication port of the collector is connected with the communication port of the relay point through a cable; the communication port of the relay point is connected with the rear-end measurement and control center through an optical cable; and the rear-end measurement and control center is used for processing the data information transmitted by the relay point.

Description

TECHNICAL FIELD

[0001] The present application relates to engine high altitude simulation test device, specifically relates to a kind of distributed measurement system for engine high altitude simulation test. BACKGROUND

[0002] Rocket engine high altitude simulation test refers to creating an environment similar to high altitude conditions in ground test equipment, so that the engine works in this environment, and carries out various tests such as performance, reliability and service life.

[0003] In the design of large complex engine high altitude simulation test system, due to its composition by medium supply system, gas distribution system, steam generation system, steam jet pump system, booster cooling system, vacuum chamber system, etc., resulting in large and complex system composition, the measuring points are relatively dispersed; And the existing system has many types of parameters, and the number is large, there are pressure (vacuum), flow, temperature and other parameters, and the amount of data to be measured exceeds one thousand types, and the measurement and control center is far away from the test table, which needs long-distance transmission.

[0004] At present, the connection between the measuring point and the acquisition device is usually achieved by laying long line measurement cable, which not only increases the cost of cable laying, but also consumes time and effort, and cannot guarantee the stability and reliability of system transmission. SUMMARY

[0005] The purpose of the present application is to solve the technical problems of high cost, time and effort of cable connection between the measuring point and the measurement and control device in the existing engine high altitude simulation test system, and the inability to guarantee the stability and reliability of system transmission, and to propose a distributed measurement system for engine high altitude simulation test.

[0006] To achieve the above purpose, the technical solution proposed by the present application is:

[0007] A distributed measurement system for engine high altitude simulation test, characterized in that it comprises a front-end test system, a relay point and a rear-end measurement and control center.

[0008] The front-end test system comprises a plurality of sensors, at least one collector and a power supply assembly, the collector is a multi-channel collector, each channel is connected to a sensor; the power supply end of a plurality of sensors is connected to the positive electrode of the power supply assembly through a cable, the signal end of the sensor is connected to the signal input positive end of the corresponding channel of the collector through a cable, and the signal input negative end of the corresponding channel of the collector is connected to the negative electrode of the power supply assembly through a cable.

[0009] The communication port of the collector is connected to the communication port of the relay point through a cable, and the communication port of the relay point is connected to the communication port of the rear-end measurement and control center through an optical cable.

[0010] The plurality of sensors are respectively used for collecting steam power parameters, steam jet pump parameters, temperature reduction and pressure increase parameters and vacuum environment parameters in the measurement system.

[0011] The relay point is used for transmitting data information in the front-end test system to the back-end measurement and control center.

[0012] The back-end measurement and control center is used for processing the received data information.

[0013] Further, each of the sensors is a two-wire sensor.

[0014] The power supply assembly includes a power supply, a fuse and at least one terminal, the positive pole of the power supply is connected to one end of the fuse through a cable, the other end of the fuse is connected to the power supply end of each sensor through a cable via the terminal, the signal end of each sensor is connected to the signal input positive end of the corresponding channel of the collector through a cable via the terminal, and the signal input negative end of the corresponding channel of each collector is connected to the negative pole of the power supply through a cable via the terminal.

[0015] Further, each of the sensors, the power supply, the sensor and the collector, and the collector and the power supply are connected through a 4-core cable.

[0016] Further, the relay point includes at least one controller and a front-end switch, the communication port of the collector is connected to the input communication port of the controller one by one through a cable, and the output communication port of each controller is connected to the input communication port of the front-end switch through a network cable.

[0017] The output communication port of the front-end switch is connected to the communication port of the back-end measurement and control center through an optical cable.

[0018] Further, the communication port of each of the collectors is connected to the input communication port of the controller through a 6-core cable.

[0019] Further, the back-end measurement and control center includes a back-end switch and a computer, the communication port of the front-end switch is connected to the input communication port of the back-end switch through an optical cable, and the output communication port of the back-end switch is connected to the computer through a network cable.

[0020] Further, the collector is a 4-channel collector, and one collector is connected to no more than 4 sensors.

[0021] The collector is arranged near the sensor closest to the relay point.

[0022] Further, the distance between each of the corresponding controllers and the collectors is no more than 150 meters.

[0023] Further, the power supply in the power supply assembly is a 24V power supply.

[0024] Advantages of the present application:

[0025] [1] The distributed measurement system for high-altitude simulation test of an engine distributes the positions of a front-end test system, a relay point and a back-end measurement and control center, adopts a multi-channel collector to correspondingly connect multiple sensors, can effectively save the laying cost of cable connection, reduces the production cost of the system, and also ensures the stability and reliability of the measurement system.

[0026] [2] The present application connects the sensors, power supply assemblies and collectors in the front-end test system through a high-reliability connection means, so as to reduce the cable cost, and also can quickly expand and adjust the number of sensors, power supply assemblies and collectors according to the actual application scene, so that it can be applied to different application scenes, and effectively improves the practicability and applicability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The structure distribution diagram of the embodiment of the distributed measurement system for high-altitude simulation test of an engine of the present application;

[0028] Figure 2 The connection schematic diagram of the power supply assembly, the sensor and the collector in the embodiment of the present application;

[0029] REFERENCE NUMERALS:

[0030] 1-front-end test system, 2-relay point, 3-back-end measurement and control center, 4-sensor, 5-collector, 6-power supply assembly, 7-power supply, 8-fuse, 9-wiring terminal, 10-controller, 11-front-end switch, 12-back-end switch, 13-computer. DETAILED DESCRIPTION

[0031] As Figure 1 shown, a distributed measurement system for high-altitude simulation test of an engine includes a front-end test system 1, a relay point 2 and a back-end measurement and control center 3.

[0032] The front-end test system 1 includes multiple sensors 4, at least one collector 5 and a power supply assembly 6; wherein the collector 5 is a 4-channel collector 5, one collector 5 can connect up to 4 sensors 4, and the collector 5 is arranged near the sensor 4 closest to the relay point 2 among the 4 sensors 4, which can effectively save the cable; the multiple sensors 4 are respectively used to collect steam power parameters, steam jet pump parameters, temperature reduction and pressure increase parameters and vacuum environment parameters in the measurement system, and specifically collect pressure (vacuum), flow, temperature, environment and other parameters.

[0033] AsFigure 2 As shown, the power supply assembly 6 includes a 24V power supply, a fuse 8 and at least one terminal 9, the 24V power supply supplies power to a plurality of sensors 4, and each of the plurality of sensors 4 is two-wire, that is, one wire is a power supply end and one wire is a signal end; the acquisition channel of the collector 5 is a signal two-wire, that is, a signal input positive end and a signal input negative end. The positive electrode of the 24V power supply is connected to the fuse 8 through a 4-core cable, the fuse 8 is connected to the power supply end of the sensor 4 through the terminal 9 via a 4-core cable, the signal end of the sensor 4 is connected to the signal input positive end of the corresponding channel of the collector 5 through the terminal 9 via a 4-core cable, and the signal input negative end of the corresponding channel is connected to the negative electrode of the 24V power supply through the terminal 9 via a 4-core cable to form a loop for measuring the sensor 4 signal.

[0034] The 24V power supply can effectively improve the reliability of system power supply, and when a short circuit occurs in the system loop, the fuse 8 can be blown to avoid damage to the 24V power supply; when a plurality of sensors 4 are powered and working, the terminal 9 can be expanded, which is convenient and reliable, and can be expanded to a scale not greater than the output power of the 24V power supply to supply power to a plurality of sensors 4, and the collector 5 can also be expanded according to the number of sensors 4. Due to the distributed design of installing the collector 5, the 24V power supply and the terminal 9 together and setting the installation position near the sensor 4, not only can the system be conveniently expanded, but also the cable length used is effectively shortened, saving production cost and system resources.

[0035] The relay point 2 includes at least one controller 10 and a front-end switch 11; the communication port of the collector 5 is connected to the input communication port of the controller 10 one by one through a 6-core cable, and the output communication port of each controller 10 is connected to the communication port of the front-end switch 11 through a network cable, wherein the distance between each corresponding controller 10 and the collector 5 is not greater than 150 meters, and the two can communicate with each other using the 485 communication protocol, which can effectively save the power supply equipment cost of the collector 5 end; all controllers 10 are connected to the back-end control center 3 for data communication through the front-end switch 11 of the relay point 2 and the back-end switch 11.

[0036] The back-end control center 3 includes a back-end switch 12 and a computer 13, the communication port of the front-end switch 11 is connected to the communication port of the back-end switch 12 through an optical cable, and the communication port of the back-end switch 12 is connected to the computer 13 through a network cable; the communication distance between the front-end switch 11 and the back-end switch 12 when communicating through the optical cable is not more than 10km.

Claims

1. A distributed measurement system for high altitude simulation testing of an engine, characterized by: It comprises a front-end test system (1), a relay point (2) and a back-end control center (3); The front-end test system (1) comprises a plurality of sensors (4), at least one collector (5) and a power supply assembly (6), the collector (5) is a multi-channel collector, each channel is connected with one sensor (4); the power supply end of the plurality of sensors (4) is connected with the positive pole of the power supply assembly (6) through a cable, the signal end of the sensor (4) is connected with the signal input positive end of the corresponding channel of the collector (5) through a cable, and the signal input negative end of the corresponding channel of the collector (5) is connected with the negative pole of the power supply assembly (6) through a cable; The communication port of the collector (5) is connected with the communication port of the relay point (2) through a cable, and the communication port of the relay point (2) is connected with the communication port of the back-end control center (3) through an optical cable; The plurality of sensors (4) are respectively used for collecting steam power parameters, steam jet pump parameters, temperature reduction and pressure increase parameters and vacuum environment parameters in a measurement system; The relay point (2) is used for transmitting data information in the front-end test system (1) to the back-end control center (3); The back-end control center (3) is used for processing the received data information.

2. The distributed measurement system for the high-altitude simulation test of an engine according to claim 1, wherein each sensor (4) is a two-wire sensor; The power supply assembly (6) comprises a power supply (7), a fuse (8) and at least one terminal (9), the positive pole of the power supply (7) is connected with one end of the fuse (8) through a cable, the other end of the fuse (8) is connected with the power supply end of each sensor (4) through a terminal (9) and a cable, the signal end of each sensor (4) is connected with the signal input positive end of the corresponding channel of the collector (5) through a terminal (9) and a cable, and the signal input negative end of the corresponding channel of each collector (5) is connected with the negative pole of the power supply (7) through a terminal (9) and a cable.

3. The distributed measurement system for the high-altitude simulation test of an engine according to claim 2, wherein each sensor (4) is connected with the power supply (7), the sensor (4) is connected with the collector (5), and the collector (5) is connected with the power supply (7) through a 4-core cable.

4. The distributed measurement system for the high-altitude simulation test of an engine according to claim 3, wherein the relay point (2) comprises at least one controller (10) and a front-end switch (11), the communication port of the collector (5) is connected with the input communication port of the controller (10) one by one through a cable, and the output communication port of each controller (10) is connected with the input communication port of the front-end switch (11) through a network cable; The output communication port of the front-end switch (11) is connected with the communication port of the back-end control center (3) through an optical cable.

5. The distributed measurement system for the high-altitude simulation test of an engine according to claim 4, wherein the communication port of each collector (5) is connected with the input communication port of the controller (10) through a 6-core cable. ​ ​ ​ ​ 6. The distributed measurement system for high-altitude simulation test of an engine according to claim 5, characterized in that: the back-end control center (3) comprises a back-end switch (12) and a computer (13), and the communication port of the front-end switch (11) is connected with the input communication port of the back-end switch (12) through an optical cable, and the output communication port of the back-end switch (12) is connected with the computer (13) through a network cable.

7. The distributed measurement system for high-altitude simulation test of an engine according to claim 6, characterized in that: the collector (5) is a 4-channel collector (5), and one collector (5) is connected with no more than 4 sensors (4); the collector (5) is arranged near the sensor (4) closest to the relay point (2).

8. The distributed measurement system for high-altitude simulation test of an engine according to claim 7, characterized in that: the distance between each corresponding connected controller (10) and collector (5) is no more than 150 meters.

9. The distributed measurement system for high-altitude simulation test of an engine according to claim 8, characterized in that: the power supply (7) in the power supply assembly (6) is a 24V power supply.

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