Distributed measurement system for high-altitude simulation test of engine

Abstract

The invention relates to an engine high-altitude simulation test, and provides a distributed measurement system for an engine high-altitude simulation test in order to solve the problems that in an existing test, the laying cost of a cable connection mode is high, and the stability of system transmission cannot be guaranteed, and the like, and the distributed measurement system 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 multi-channel collector, and each channel is correspondingly connected with one sensor; the power end of each sensor is connected with the positive electrode of the power supply assembly through a cable, the signal end of each sensor is connected with 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 with the negative electrode of the power supply assembly through a cable. A communication port of the collector is connected with a 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 data information transmitted by the relay point.

Description

Technical Field

[0001] The invention relates to an engine high altitude simulation test device, in particular to a distributed measurement system for an engine high altitude simulation test. Background Art

[0002] The high-altitude simulation test of a rocket engine refers to creating an environment similar to high-altitude conditions in ground test equipment, allowing the engine to operate in this environment and conduct various tests on its performance, reliability, service life, etc.

[0003] When designing a large and complex engine high-altitude simulation test system, since it is composed of a medium supply system, an air distribution system, a steam generation system, a steam jet pump system, a pressure-boosting and cooling system, a vacuum chamber system, etc., the system composition is large and complex, and its measuring points are relatively scattered; and the existing system parameters are of many types and quantities, including pressure (vacuum), flow, temperature and other parameters. The amount of data that needs to be measured exceeds more than one thousand types, and the measurement and control center is far away from the test bench, requiring long-distance transmission.

[0004] At present, the measurement points are usually connected to the collection equipment by using centralized collection equipment and laying long measurement cables. This connection method not only increases the cost of laying cables, is time-consuming and labor-intensive, but also cannot guarantee the stability and reliability of system transmission. Summary of the invention

[0005] The purpose of the present invention is to solve the technical problems such as high laying cost, time and labor consumption, and inability to guarantee system transmission stability and reliability of the cable connection method used between the measuring points and the measurement and control equipment in the existing engine high-altitude simulation test system, and to propose a distributed measurement system for engine high-altitude simulation test.

[0006] To achieve the above objectives, the technical solution proposed by the present invention is:

[0007] A distributed measurement system for high-altitude simulation test of an engine, which is special in that it includes a front-end test system, a relay point and a back-end measurement and control center;

[0008] The front-end test system includes multiple sensors, at least one collector and a power supply component. The collector is a multi-channel collector, and each channel is connected to a sensor; the power supply end of the multiple sensors is connected to the positive pole of the power supply component through a cable, the signal end of the sensor is connected to the positive signal input end of the corresponding channel of the collector through a cable, and the negative signal input end of the corresponding channel of the collector is connected to the negative pole of the power supply component 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 back-end measurement and control center through an optical cable;

[0010] The multiple sensors are used to collect steam power parameters, steam jet pump parameters, temperature reduction and pressure increase parameters and vacuum environment parameters in the measurement system respectively;

[0011] The relay point is used to transmit data information from the front-end test system to the back-end measurement and control center;

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

[0013] Furthermore, each of the sensors is a two-wire sensor;

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

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

[0016] Furthermore, 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 in a one-to-one correspondence 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] Furthermore, the communication port of each collector is connected to the input communication port of the controller via a 6-core cable.

[0019] Furthermore, 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] Furthermore, 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] Furthermore, the setting distance between each correspondingly connected controller and collector is no more than 150 meters.

[0023] Furthermore, the power supply in the power supply component is a 24V power supply.

[0024] Beneficial effects of the present invention:

[0025] [1] The distributed measurement system for high-altitude simulation test of an engine of the present invention arranges the positions of the front-end test system, relay points and the back-end measurement and control center in a distributed design. The use of a multi-channel collector to connect multiple sensors can effectively save the laying cost of cable connections and reduce the system production cost, while also ensuring the stability and reliability of the measurement system.

[0026] [2] The present invention connects the sensors, power components and collectors in the front-end test system through a highly reliable connection method, so as to achieve the purpose of reducing cable costs. At the same time, the number of sensors, power components and collectors used can be quickly expanded and adjusted according to actual application scenarios, so that they can be applied to different application scenarios, effectively improving the practicality and applicability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A structural distribution diagram of an embodiment of a distributed measurement system for an engine high-altitude simulation test according to the present invention;

[0028] Figure 2 This is a schematic diagram of the connection of a power supply component, a sensor, and a collector in an embodiment of the present invention;

[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 component, 7-Power supply, 8-Fuse, 9-Terminal block, 10-Controller, 11-Front-end switch, 12-Back-end switch, 13-Computer. DETAILED DESCRIPTION

[0031] like Figure 1 As 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 component 6; the collector 5 is a 4-channel collector 5, and one collector 5 can connect to up to 4 sensors 4. The collector 5 is arranged near the sensor 4 closest to the relay point 2 among the 4 sensors 4, which can effectively save cables; the multiple sensors 4 are used to collect steam power parameters, steam jet pump parameters, temperature reduction and pressure increase parameters and vacuum environment parameters in the measurement system, specifically collecting pressure (vacuum), flow, temperature, environment and other parameters.

[0033] like Figure 2 As shown, the power supply component 6 includes a 24V power supply, a fuse 8 and at least one wiring terminal 9. The 24V power supply supplies power to multiple sensors 4. All of the multiple sensors 4 are two-wire systems, i.e., one line is the power supply end and one line is the signal end; the acquisition channel of the collector 5 is a two-wire signal, i.e., the signal input positive end and the signal input negative end. The positive pole of the 24V power supply is connected to the fuse 8 through a 4-core cable, and the fuse 8 is connected to the power supply end of the sensor 4 through the wiring terminal 9 through the 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 4-core cable through the wiring terminal 9, and the signal input negative end of the corresponding channel is connected to the negative pole of the 24V power supply through the 4-core cable through the wiring terminal 9 to form a loop for measuring the signal of the sensor 4.

[0034] The 24V power supply can effectively improve the reliability of the system power supply. When a short circuit occurs in the system loop, the fuse 8 can be blown to avoid damage to the 24V power supply. When multiple sensors 4 are powered and working, they can be expanded through the wiring terminal 9, which is convenient and reliable. It can be expanded to a scale not greater than the output power of the 24V power supply itself to power multiple sensors 4, and the collector 5 can also be expanded according to the number of sensors 4. Due to the distributed design, the collector 5, 24V power supply, and wiring terminal 9 are installed together, and the installation position is set near the sensor 4, which not only facilitates the expansion of the system, but also effectively shortens the length of the cable used, saving production costs 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 one-to-one with the input communication port of the controller 10 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 setting distance between each correspondingly connected controller 10 and the collector 5 is not greater than 150 meters, and the two can communicate using the 485 communication protocol, which can effectively save the cost of the power supply equipment at the collector 5 end; all controllers 10 are connected to the front-end switch 11 of the relay point 2 through a network cable to communicate data with the back-end measurement and control center 3.

[0036] The back-end measurement and 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 via an optical cable, and the communication port of the back-end switch 12 is connected to the computer 13 via a network cable; the communication distance between the front-end switch 11 and the back-end switch 12 when communicating via an optical cable does not exceed 10km.

Claims

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

2. A distributed measurement system for engine high altitude simulation test according to claim 1, characterized in that: Each of the sensors (4) is a two-wire sensor; The power supply component (6) comprises a power supply (7), a fuse (8) and at least one wiring terminal (9); the positive electrode of the power supply (7) is connected to one end of the fuse (8) via a cable; the other end of the fuse (8) is connected to the power supply end of each sensor (4) via a cable via the wiring terminal (9); the signal end of each sensor (4) is connected to the positive signal input end of the corresponding channel of the collector (5) via a cable via the wiring terminal (9); the negative signal input end of the corresponding channel of each collector (5) is connected to the negative electrode of the power supply (7) via a cable via the wiring terminal (9).

3. A distributed measurement system for engine high altitude simulation test according to claim 2, characterized in that: Each of the sensors (4) and the power supply (7), the sensor (4) and the collector (5), and the collector (5) and the power supply (7) are connected via a 4-core cable.

4. A distributed measurement system for engine high altitude simulation test according to claim 3, characterized in that: 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 to the input communication port of the controller (10) in a one-to-one correspondence via a cable; and the output communication port of each controller (10) is connected to the input communication port of the front-end switch (11) via a network cable; The output communication port of the front-end switch (11) is connected to the communication port of the back-end measurement and control center (3) via an optical cable.

5. A distributed measurement system for engine high altitude simulation test according to claim 4, characterized in that: The communication port of each collector (5) is connected to the input communication port of the controller (10) via a 6-core cable.

6. A distributed measurement system for engine high altitude simulation test according to claim 5, characterized in that: The back-end measurement and control center (3) comprises a back-end switch (12) and a computer (13); the communication port of the front-end switch (11) is connected to the input communication port of the back-end switch (12) via an optical cable, and the output communication port of the back-end switch (12) is connected to the computer (13) via a network cable.

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

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

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

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