Rail transit train air supply unit test system

Abstract

The present invention relates to the field of rail transit technology, and discloses a rail transit train air supply unit test system, which is characterized in that it includes a chassis main body, a detection component, a control component and a controller, the chassis main body includes an air intake pipe group, a buffer tank, a transition pipe group and a test tank, the air intake pipe group is used to connect the device to be tested and the buffer tank, and the transition pipe group is used to connect the buffer tank and the test tank; the detection component is used to perform real-time detection, firstly, a corresponding control instruction can be generated according to a specific detection task, and then a control instruction for the next stage can be generated according to the result of the execution of the control instruction, so that it has adaptability and dynamism, and can ensure that the system can correspond to different air supply units and intelligently feedback temporary test conditions to correct the next test task, and then obtain more detailed and multi-dimensional information through the cooperation of the control component and the detection component to ensure the accuracy of the test.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit, and in particular to a test system for an air supply unit of a rail transit train. Background Art

[0002] At present, standard air supply unit test benches are commonly used for testing air supply units. Ordinary air supply unit test benches mainly test the exhaust temperature and humidity, pressure, flow rate, etc. Most flow tests are performed using the nozzle method. The equipment occupies a large area, requires a large number of sensors, and has complex installation location requirements. The accuracy of the test is greatly affected by the environment, and it is not convenient for third-party certification methods such as verification and calibration.

[0003] When using the nozzle method for flow testing, the size of the nozzle, the temperature inside and outside the nozzle, the pressure, etc. need to be obtained, and the impact of condensed water on the volume must also be considered. The test accuracy is affected by the accuracy of multiple sensors, and the final accuracy is not well described. In addition, when the environment changes, the nozzle is worn, and the sensor is replaced, the final calculated data is greatly affected. When performing third-party verification, multiple sensors need to be verified at the same time. The accuracy and positive and negative deviations of each sensor will affect the calculation results. At this time, although the accuracy of each process value sensor can be improved, the flow measurement accuracy cannot be improved. At the same time, the overall volume of the nozzle method test is huge, requiring more mechanical structures, occupying a large area and being inconvenient to move; Publication No. CN11273 Patent 0625A discloses a sound absorption coefficient test system, method and vehicle, the system includes: a sound transmission device, arranged in the test pipe, used to convert the sound waves not absorbed by the sound absorbing material into a sound signal, wherein the sound absorbing material is arranged on the side wall of the test pipe; a wind speed detection device, arranged in the test pipe, used to detect the flow rate of the fluid load in the test pipe; a processing device, respectively connected to the sound transmission device and the wind speed detection device, used to receive the sound signal transmitted by the sound transmission device and the flow rate of the fluid load transmitted by the wind speed detection device, and perform fast Fourier transform on the sound signal to determine the sound absorption coefficient of the sound absorbing material under different flow rate fluid loads. The above system can improve the test accuracy, convenience and reduce costs. The patent with publication number CN108333095B discloses a method for testing an air conditioning filter, a testing device for an air conditioning filter, and a vehicle. The method includes: a switch receives a control instruction from a user; a central controller calculates the current usage of the air conditioning filter according to the control instruction; and a prompt component outputs a prompt message, wherein the prompt message includes the current usage of the filter. Since the present invention can directly obtain the current usage of the air conditioning filter in real time, it can directly determine whether the air conditioning filter has actually reached the replacement time based on the current usage of the air conditioning filter, that is, it can more accurately determine the replacement time of the air conditioning filter, thereby making the replacement of the air conditioning filter more timely. The difference is that the test of the train air supply unit requires the test device to be moved to the corresponding detection position, and whether the air conditioning filter needs to be replaced is only one of the detection items, so it needs to be more accurately detected and analyzed.

[0004] In addition, the current test on the air supply unit is not targeted and accurate. The flow test of the first air supply unit should have different test content and configuration corresponding to different air supply unit types. For example, in some cases, it is necessary to test the output air pressure under resistance, or test its output efficiency under negative pressure, and other special test scenarios to make an accurate analysis of the performance of the air supply components of the air supply unit. In addition, in the scenario of flow testing, it is also necessary to continuously revise the test tasks according to the actual test results to ensure the best test effect. Summary of the invention

[0005] The purpose of the present invention is to provide a rail transit train air supply unit testing system to solve the problem that when using the nozzle method to perform flow testing, the size of the nozzle, the temperature inside and outside the nozzle, the pressure, etc. need to be obtained, and the influence of condensed water on the volume, etc. must also be considered. The test accuracy is affected by the accuracy of multiple sensors, and the final accuracy is not well described. When the environment changes, the nozzle is worn, the sensor is replaced, etc., it will have a greater impact on the final calculated data. When performing third-party verification, multiple sensors need to be verified at the same time, and the accuracy and positive and negative deviations of each sensor will affect the calculation results.

[0006] Provided is a rail transit train air supply unit test system, comprising a chassis body, a detection component, a control component and a controller, wherein the chassis body comprises an air intake pipe group, a buffer tank, a transition pipe group and a test tank, wherein the air intake pipe group is used to connect the device to be tested and the buffer tank, and the transition pipe group is used to connect the buffer tank and the test tank;

[0007] The detection assembly includes an environment detection group and a flow state detection group, the environment detection group includes a temperature detection unit and a humidity detection unit, and the flow state detection group includes a flow detection unit and an air pressure detection unit;

[0008] The control assembly includes an inlet flow control component, a transition control component and a leakage flow control component, wherein the inlet flow control component is installed on the test tube group, the transition control component is installed on the transition tube group, and the leakage flow control component is installed on the test tank;

[0009] The controller is configured with a control strategy, the control strategy comprising:

[0010] Step S1, receiving a test task, and calling corresponding control instructions, dynamic trigger conditions and macro end conditions according to the test task;

[0011] Step S2, controlling the control component to work through the control instruction, and obtaining corresponding detection information through the detection component;

[0012] Step S3, calculating the feedback deviation corresponding to the detection information through the detection feedback algorithm;

[0013] Step S4, matching the corresponding dynamic trigger condition according to the feedback deviation and calling the next control instruction according to the dynamic trigger condition;

[0014] Step S5, determine whether the macro end condition is met, if not, return to step S2, if the macro end condition is met, output the corresponding test result.

[0015] Furthermore: the controller is pre-configured with a trigger database, and the trigger database stores a number of control instruction networks. Each of the control instruction networks uses dynamic trigger conditions as a connection pointer between control instructions. Each control instruction corresponds to at least two connection pointers pointing to other control instructions. The control instruction network is indexed by the test task value. Step S1 is also configured with a preset task value calculation algorithm to calculate the corresponding test task value.

[0016] Further: the task value calculation algorithm is configured as ,in, is the test task value corresponding to the test task, is a preset static adjustment weight, Adjust the weights for the air supply unit types in the test task. Adjust the weights for the preset types, The deviation adjustment weight corresponding to the historical test deviation in the test task, Adjust the weights for the preset biases, For the test task The benchmark test value corresponding to each test item is obtained by querying a preset benchmark test table. is the total number of test items in the test task.

[0017] Further: the detection feedback algorithm includes , , , ,in, is the feedback bias, is the flow deviation rate, is the preset buffer deviation weight, is the buffer deviation value, is the preset test bias weight, is the test deviation value, is the flow rate abnormality ratio, which corresponds to the state of the control component, is the maximum flow deviation of the flow detection unit, is the preset reference flow deviation, is the preset reference flow base value, It is the detection fluctuation waveform of the air pressure detection unit corresponding to the buffer tank. To detect the starting time, To detect the end time, is a buffer fitting function corresponding to the buffer tank, the buffer fitting function is pre-stored in a buffer fitting table, and is indexed by buffer environment information, the buffer environment information includes buffer temperature data fed back by a temperature detection unit corresponding to the buffer tank and buffer humidity data fed back by a humidity detection unit corresponding to the buffer tank, is the preset buffer pressure reference waveform. It is the detection fluctuation waveform of the air pressure detection unit corresponding to the test tank. is a test fitting function corresponding to the test tank, the test fitting function is pre-stored in a test fitting table, and is indexed by test environment information, the test environment information includes test temperature data fed back by a temperature detection unit corresponding to the test tank and test humidity data fed back by a humidity detection unit corresponding to the test tank, It is the preset test pressure reference waveform. For actual time.

[0018] Furthermore: the test task includes several test items, the macro end condition is configured to configure a test trigger threshold for each test item, each control instruction has different test trigger configuration values ​​corresponding to different test items, and the corresponding test trigger configuration value is accumulated when the control instruction is completed. When the test trigger configuration values ​​corresponding to all test items are respectively greater than the corresponding test trigger thresholds, the macro end condition is deemed to be met.

[0019] Furthermore: the inlet flow control component, transition control component and leakage flow control component are all configured as solenoid valves, and the control instruction includes an opening adjustment item, which corresponds to the opening of the inlet flow control component, transition control component and leakage flow control component during the test.

[0020] Further: the test tank is connected to a leakage pipe group, the flow detection unit includes a transition flow detection unit, an intake flow detection unit and a leakage flow detection unit, the transition flow detection unit is installed in the transition pipe group, the leakage flow detection unit is installed in the leakage pipe group, the intake flow detection unit is installed in the intake pipe group, and the maximum flow deviation is calculated by the following formula: ,in, is the instantaneous maximum flow rate fed back by the intake flow detection unit, is the instantaneous minimum flow rate fed back by the transition flow detection unit, is the instantaneous maximum flow rate fed back by the transition flow detection unit, It is the instantaneous minimum flow rate fed back by the leakage flow detection unit.

[0021] Further: the temperature detection unit includes an external temperature detection unit, a buffer temperature detection unit and a test temperature detection unit, the external temperature detection unit is used to detect the external environmental temperature, the buffer temperature detection unit is used to detect the temperature inside the buffer tank, and the test temperature detection unit is used to detect the temperature inside the test tank; the humidity detection unit includes an external humidity detection unit, a buffer humidity detection unit and a test humidity detection unit, the external humidity detection unit is used to detect the external environmental humidity, the buffer humidity detection unit is used to detect the humidity inside the buffer tank, and the test humidity detection unit is used to detect the humidity inside the test tank.

[0022] Furthermore: the buffer temperature data includes the time lag relationship between the external temperature and the temperature change in the buffer tank, the buffer humidity data includes the time lag relationship between the external humidity and the humidity change in the buffer tank, the test temperature data includes the time lag relationship between the external temperature and the temperature in the test tank, and the test humidity data includes the time lag relationship between the external humidity and the humidity in the test tank.

[0023] Furthermore: each of the dynamic trigger conditions is configured with a corresponding trigger value range, and when the feedback deviation falls into the corresponding trigger value range, the dynamic trigger condition is deemed to be satisfied.

[0024] Compared with the prior art, the beneficial effects of the present invention are: through real-time detection by the detection component, the corresponding control instructions can be generated according to the specific detection task first, and then the control instructions for the next stage can be generated according to the results of the control instruction execution, which is adaptable and dynamic, and can ensure that the system can correspond to different air supply units and intelligently feedback temporary test conditions to correct the next test task, and then obtain more detailed and multi-dimensional information through the cooperation of the control component and the detection component to ensure the accuracy of the test. The test equipment can obtain a more stable and accurate flow rate, and the flow meter can be independently calibrated during third-party calibration, avoiding the disassembly and assembly of a large number of sensors, and eliminating the impact of the same type and range sensors installed in different positions on the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The schematic diagram of the rail transit train air supply unit test system;

[0026] Figure 2 This is a structural diagram of the rail transit train air supply unit test system;

[0027] Figure 3 This is a schematic diagram of the partial structure of the side of the chassis body in the rail transit train air supply unit test system;

[0028] Figure 4 This is a schematic diagram of the main structure of the rack in the rail transit train air supply unit test system;

[0029] Figure 5 This is a schematic diagram of the air compressor cylinder structure in the rail transit train air supply unit test system;

[0030] Figure 6 This is a schematic diagram of the overhead structure of the air compressor cylinder in the rail transit train air supply unit test system.

[0031] In the figure: 100, controller; 200, detection component; 210, environmental detection group; 220, flow detection group; 300, control component; 1, chassis body; 11, cover plate; 12, support column; 13, extension frame; 14, cross bar; 15, rack body; 16, cross frame; 2, emergency stop switch; 21, cable connector; 22, temperature and humidity transmitter; 23, heavy-duty connector; 3, support frame; 31, test tank; 32, safety valve; 33, test connector; 34, test pressure sensor; 35, drain pipe; 3 6. High-pressure ball valve; 37. Ball valve pressure plate; 4. Buffer tank; 41. Buffer pressure sensor; 42. Inlet pipe; 43. Adapter plate; 44. Inlet flow detector; 45. Temperature sensor; 46. Inlet pressure sensor; 47. Dew point transmitter; 48. One-way valve; 49. Sealing ferrule joint; 5. First connecting pipe; 51. Three-way ferrule joint; 52. Leakage flow detector; 53. Leakage control valve; 54. Muffler; 55. Transition control valve; 56. Transition flow detector; 57. Second connecting pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] Reference Figure 1 , Figure 2 As shown, the system architecture and control part are described in detail. A rail transit train air supply unit test system includes a chassis body 1, a detection component 200, a control component 300 and a controller 100. The chassis body 1 includes an air intake pipe 42 group, a buffer tank 4, a transition pipe group and a test tank 31. The air intake pipe 42 group is used to connect the device to be tested and the buffer tank 4, and the transition pipe group is used to connect the buffer tank 4 and the test tank 31.

[0034] The detection component 200 includes an environment detection group 210 and a flow state detection group 220. The environment detection group 210 includes a temperature detection unit and a humidity detection unit. The purpose of the environment detection group 210 is to detect the difference between the test temperature and humidity and the environment temperature and humidity during the detection process, so as to detect and feedback the dehumidification and heating effects of the air supply component, as well as the temperature changes caused by volume contraction or expansion. Preferably, corresponding temperature and humidity sensors can be arranged inside the buffer tank and the discharge tank, and can also be arranged at the air intake pipe group and the discharge pipe group to represent the temperature and humidity inside the corresponding tank body. The temperature detection unit includes an external temperature detection unit, a buffer temperature detection unit and a test temperature detection unit. The external temperature detection unit is used to detect the external environment temperature, the buffer temperature detection unit is used to detect the temperature in the buffer tank, and the test temperature detection unit is used to detect the temperature in the test tank; the humidity detection unit includes an external humidity detection unit, a buffer humidity detection unit and a test humidity detection unit. The external humidity detection unit is used to detect the external environment humidity, the buffer humidity detection unit is used to detect the humidity in the buffer tank, and the test humidity detection unit is used to detect the humidity in the test tank.

[0035] The flow state detection group 220 includes a flow detection unit and an air pressure detection unit; the test tank is connected to a leakage pipe group, the flow detection unit includes a transition flow detection unit, an intake flow detection unit and a leakage flow detection unit, the transition flow detection unit is installed in the transition pipe group, the leakage flow detection unit is installed in the leakage pipe group, the intake flow detection unit is installed in the intake pipe group, the flow detection unit is intended to test the change in gas flow at this position, so flow detection can be set at three positions, the first is the intake position, the second is the transition position, and the third is the outlet position, and air pressure detection needs to be set inside at least two tank bodies, the first is the buffer tank, and the second is the test tank.

[0036] The control assembly 300 includes an inlet flow control component, a transition control component and a leakage flow control component, wherein the inlet flow control component is installed on the test tube group, the transition control component is installed on the transition tube group, and the leakage flow control component is installed on the test tank; the inlet flow control component, the transition control component and the leakage flow control component are all configured as solenoid valves, and the control instructions include an opening adjustment item, which corresponds to the opening of the inlet flow control component, the transition control component and the leakage flow control component during the test process. The controlled part is also divided into three parts in theory. The first is the position of air intake, the second is the position of transition, and the third is the position of flow discharge. The opening of these three positions can change with time to obtain more accurate test results. For example, when the test tank is under normal pressure, the air intake, transition, and flow discharge control parts are fully opened, so that the airflow entering the test tank is emptied. At this time, the flow rate and flow rate of the air supply unit output and the noise condition can be tested through the test tank and the buffer tank (the detection of the noise condition can be configured by the corresponding sound sensor). Since the analysis of the test is not the core invention content of the present invention, it will not be repeated here. At this time, the output power of the air supply unit can be gradually opened in one dimension to determine the first critical power at which the air pressure change fluctuates in the buffer tank and the test tank. Continuing to increase the power can also determine the second critical power at which the air pressure change no longer fluctuates. The detection data before and after the corresponding moment are recorded, and the opening of the corresponding flow discharge control unit and the transition control unit can be gradually limited under fixed power conditions to determine the critical opening value, thereby determining the actual air supply volume under fixed power. However, if, as mentioned above, all detection tasks are independent of each other, timely feedback cannot be provided for some special situations, such as unstable air supply power and actual air supply volume, or abnormal output. In this case, the next stage of detection tasks need to be dynamically adjusted according to the actual abnormal situation, so as to complete targeted detection.

[0037] The controller 100 is configured with a control strategy, which includes:

[0038] Step S1, receiving the test task, and calling the corresponding control instructions, dynamic trigger conditions and macro end conditions according to the test task; the controller is pre-configured with a trigger database, and the trigger database stores a number of control instruction networks, each of which uses dynamic trigger conditions as a connection pointer between control instructions, and each control instruction corresponds to at least two connection pointers pointing to other control instructions. The control instruction network is indexed by the test task value, and the step S1 is also configured with a preset task value calculation algorithm to calculate the corresponding test task value. First, the control instruction network is pre-configured according to the test difficulty, and then each control instruction network can be understood to correspond to different test complexities and test difficulties, so the corresponding control instruction network can be obtained by parsing the test task. After obtaining the control instruction network, it does not mean that the actual test content to be executed is the same. The control instruction of the next control instruction network to be executed must also be determined according to the judgment of the corresponding dynamic trigger conditions. The test task includes manually input test target parameters, such as test accuracy, number of tests, etc., test items and the selection of test requirements for each test item, and then also includes the type of air supply unit to be tested. The task value calculation algorithm is configured as follows: ,in, is the test task value corresponding to the test task, is a preset static adjustment weight, The type adjustment weights corresponding to the air supply unit types in the test task are different. Different types of air supply units have different type adjustment weights. In order to pre-establish the association between the type and the adjustment weight, Adjust the weights for the preset types, is the deviation adjustment weight corresponding to the historical test deviation in the test task. The historical test deviation reflects the deviation of the result corresponding to a single control instruction, indicating the difficulty value corresponding to the test instruction. Adjust the weights for the preset biases, For the test task The benchmark test value corresponding to each test item is obtained by querying a preset benchmark test table. It is the total number of test items in the test task. Each test item has a benchmark test value. The corresponding comprehensive test value can be obtained by adding up the benchmark test values.

[0039] Step S2, control the control component through control instructions, and obtain corresponding detection information through the detection component; Step S2 is to collect corresponding information through control and detection in preparation for feedback verification, and the detection information can be used as the basis for generating the final test results.

[0040] Step S3: Calculate the feedback deviation corresponding to the detection information through a detection feedback algorithm; the detection feedback algorithm includes: , , , ,in, is the feedback bias, is the flow deviation rate, is the preset buffer deviation weight, is the buffer deviation value, is the preset test bias weight, For the test deviation value, it can be understood that the feedback deviation is affected by three variables. The first is the flow deviation rate, which reflects the actual flow deviation. The second is the deviation of the actual test pressure of the test tank. The third is the deviation of the actual pressure of the buffer tank. is the flow abnormality ratio, which corresponds to the state of the control component. Since each control instruction corresponds to three opening values ​​of the control component, three values ​​are generated according to the ranges in which the opening values ​​of the three control units fall. By searching the pre-set flow control table according to these three values, the corresponding flow abnormality ratio can be obtained. The flow abnormality ratio reflects the ratio in which the abnormality is magnified when the flow is abnormal, because different opening conditions correspond to different degrees of abnormality. is the maximum flow deviation of the flow detection unit,

[0041] The maximum flow deviation is calculated by the following formula: ,in, is the instantaneous maximum flow rate fed back by the intake flow detection unit, is the instantaneous minimum flow rate fed back by the transition flow detection unit, is the instantaneous maximum flow rate fed back by the transition flow detection unit, is the instantaneous minimum flow rate fed back by the leakage flow detection unit, is the preset reference flow deviation, is the preset reference flow base value, It is the detection fluctuation waveform of the air pressure detection unit corresponding to the buffer tank, that is, the actual signal change of the pressure sensor feedback during this period. To detect the starting time, To detect the end time, is a buffer fitting function corresponding to the buffer tank, the buffer fitting function is pre-stored in the buffer fitting table, with the buffer environment information as the index, the buffer environment information includes the buffer temperature data fed back by the temperature detection unit corresponding to the buffer tank and the buffer humidity data fed back by the humidity detection unit corresponding to the buffer tank, the buffer temperature data includes the time lag relationship between the external temperature and the temperature change in the buffer tank, the buffer humidity data includes the time lag relationship between the external humidity and the humidity change in the buffer tank, the corresponding buffer tank correction value can be generated through the time lag relationship, the preset fitting function can eliminate part of the clutter and adjust the phase relationship to make the phase as consistent as possible with the corresponding buffer pressure reference waveform, so that the envelope area obtained will be more accurate, is the preset buffer pressure reference waveform. It is the detection fluctuation waveform of the air pressure detection unit corresponding to the test tank. is a test fitting function corresponding to the test tank, the test fitting function is pre-stored in a test fitting table, with test environment information as an index, the test environment information includes test temperature data fed back by a temperature detection unit corresponding to the test tank and test humidity data fed back by a humidity detection unit corresponding to the test tank, the test temperature data includes a time lag relationship between an external temperature and a temperature inside the test tank, the test humidity data includes a time lag relationship between an external humidity and a humidity inside the test tank, It is the preset test pressure reference waveform. The actual time. The abnormal situation can be judged through three dimensions, and then the next associated control instruction can be judged according to the abnormal situation of this test.

[0042] Step S4, matching the corresponding dynamic trigger condition according to the feedback deviation and calling the next control instruction according to the dynamic trigger condition; each of the dynamic trigger conditions is configured with a corresponding trigger value range, and when the feedback deviation falls into the corresponding trigger value range, the dynamic trigger condition is deemed to be satisfied.

[0043] Step S5, determine whether the macro end condition is met, if not, return to step S2, if the macro end condition is met, output the corresponding test result.

[0044] The test task includes several test items, and the macro end condition is configured to configure a test trigger threshold for each test item. Each control instruction has different test trigger configuration values ​​corresponding to different test items. When the control instruction is completed, the corresponding test trigger configuration value is accumulated. When the test trigger configuration values ​​corresponding to all test items are respectively greater than the corresponding test trigger thresholds, the macro end condition is deemed to be met.

[0045] The characteristics of the specific structural parts are as follows:

[0046] like Figure 2 and Figure 3 As shown, the present invention provides a technical solution: a rail transit train air supply unit test system, including a chassis body 1, the upper top of the chassis body 1 is bolted to a cover plate 11, the upper top of the cover plate 11 is symmetrically bolted to a support column 12, the upper top of the support column 12 is fixedly connected to an extension frame 13, the upper tops of every two extension frames 13 are bolted to a cross bar 14, the interior of the chassis body 1 is fixedly connected to a frame body 15, and the inner bottom end of the frame body 15 is provided with a double tank structure for flow test of compressed air. By adopting the above scheme and using a double tank structure, effective isolation and flow testing of compressed air are achieved. The parallel placement of the test tank 31 and the buffer tank 4 reduces the interference of airflow fluctuations on the test results. The air intake control valve 48 on the air pipe is combined with the sealing ferrule joint 49 to ensure the unidirectional flow of the airflow and the tightness of the connection. The environmental detector 45 (used to detect the ambient temperature and humidity, and a temperature sensor and a humidity sensor are also provided inside the tank body) integrated on the adapter plate 43, the intake pressure sensor 46 and the dew point transmitter 47 all belong to the corresponding environmental detection group 210, which can monitor the intake status in real time, providing a strong guarantee for the accuracy of the test data. The model of the environmental detector 45 can be JWSK-6ACWD.

[0047] like Figure 4 , Figure 5 and Figure 6 As shown, the double tank structure includes a support frame 3 symmetrically fixedly connected to the bottom end of the frame body 15, the upper top of the support frame 3 is respectively fixedly connected with a test tank 31 and a buffer tank 4, the test tank 31 and the buffer tank 4 are placed side by side, the inlet end of the buffer tank 4 is fixedly connected with an inlet pipe 42, the end of the inlet pipe 42 is provided with an inlet control valve 48, the inlet control valve 48 (belonging to the control component 300) and the inlet pipe 42 are relatively connected by a sealing sleeve joint 49, and the inlet of the inlet control valve 48 is An adapter plate 43 is provided at the gas end, and an environmental detector 45, an intake pressure sensor 46 and a dew point transmitter 47 are evenly arranged on the upper top of the adapter plate 43. An intake flow detector 44 connected to an external pipeline is provided at the intake end of the adapter plate 43 for detecting the intake flow. Several buffer pressure sensors 41 are symmetrically provided at the upper top of the buffer tank 4. A buffer temperature sensor and a buffer humidity sensor are provided inside the buffer tank 4 for detecting temperature and humidity respectively, which belong to the corresponding environmental detection group 210.

[0048] like Figure 5 and Figure 6As shown, a safety valve 32 is provided at the top of the test tank 31, and a test pressure sensor 34 (belonging to the flow state detection group 220) is provided at the top of the test tank 31 on one side of the safety valve 32. With the above scheme, the safety valve 32 installed on the top of the test tank 31, as an important safety device of the system, can automatically release the pressure when the pressure is abnormal, effectively preventing equipment damage or safety accidents caused by overpressure. The setting of the test pressure sensor 34 provides real-time monitoring of the internal pressure of the test tank 31, ensuring that the test process is carried out within a safe range. The model of the test pressure sensor 34 and the intake pressure sensor 46 can be 3500B0016G05E000. A test temperature sensor and The test humidity sensor is used to detect the test temperature and humidity respectively. A test joint 33 is provided at the upper top of the test tank 31, located on one side of the test pressure sensor 34. The drainage ends of the test tank 31 and the buffer tank 4 are fixedly connected with a drainage pipe 35. A high-pressure ball valve 36 is provided at the end of the drainage pipe 35. The outer wall of the high-pressure ball valve 36 is bolted with a ball valve pressure plate 37 with a restricted position. With the above scheme, the drainage ends of the test tank 31 and the buffer tank 4 are equipped with a drainage pipe 35 and a high-pressure ball valve 36. This design makes the drainage operation more convenient and efficient. The combined use of the high-pressure ball valve 36 and the ball valve pressure plate 37 not only ensures the sealing of the valve, but also prevents misoperation through the design of the restricted position, simplifies the drainage process, and improves the maintenance efficiency of the system. The outer wall of the test tank 31 is fixedly connected with a first connecting pipe 5, and the end of the first connecting pipe 5 is fixedly connected with a three-way ferrule joint 51, and the other two ends of the three-way ferrule joint 51 are provided with a leakage flow detector 52, and the end of the leakage flow detector 52 is provided with a leakage control valve 53 (belonging to the control component 200), and the leakage control valve 53 and the three-way ferrule joint 51 are limitedly connected through the leakage flow detector 52, and a muffler 54 is provided at the end of the leakage control valve 53 away from the first connecting pipe 5. With the above scheme, the first connecting pipe 5 on the outer wall of the test tank 31 is connected to the leakage control valve 53 through the three-way ferrule joint 51, so as to realize the precise control of the airflow, and the combined use of the leakage control valve 53 and the muffler 54 not only ensures the accuracy of flow regulation, but also effectively reduces the exhaust noise and reduces the pollution of the noise to the detection data.

[0049] like Figure 3 , Figure 4 and Figure 5As shown, the buffer tank 4 and the test tank 31 are connected to each other through the second connecting pipe 57 at one end away from the first connecting pipe 5. A transition control valve 55 is installed in the middle of the outer wall of the second connecting pipe 57. The outer wall of the transition control valve 55 is fixedly connected with a transition flow detector 56 for detecting the transition flow. The transition flow detector 56 is connected to the frame body 15 by bolts. With the above scheme, the buffer tank 4 and the test tank 31 are connected to each other through the second connecting pipe 57. The installation position of the transition flow detector 56 (belonging to the flow state detection group 220) is accurate and stable, ensuring the accuracy of the flow measurement. The connection method of the transition control valve 55 and the bolts enhances the stability of the flow meter and avoids measurement errors caused by vibration and other reasons. The bolt connection between the cross frame 16 and the adapter plate 43 further improves the overall stability of the system. The inner wall of the rack body 15 is fixedly connected with a cross frame 16, the lower bottom end of the adapter plate 43 is connected to the upper top of the cross frame 16 by bolts, the upper top of the cover plate 11 is located on one side of one of the support columns 12 and an emergency stop switch 2 is installed, the outer wall of the chassis body 1 is fixedly connected with a cable connector 21, the outer wall of the chassis body 1 is located below the cable connector 21 and a temperature and humidity transmitter 22 is installed, and the outer wall of the chassis body 1 is located obliquely below the temperature and humidity transmitter 22 and a heavy-duty connector 23 is installed. With the above scheme, the emergency stop switch 2 installed on the cover plate 11 provides convenience for rapid shutdown in emergency situations, and the reasonable configuration of the cable connector 21, the temperature and humidity transmitter 22 and the heavy-duty connector 23 not only facilitates the power supply and signal transmission of the system, but also improves the system's adaptability to the environment, making the test system easier to operate and maintain, and reducing the cost of use.

[0050] The working principle of the equipment itself: the air supply unit is an external air compressor or other gas exhaust device, wherein the pipeline of the air supply unit will be connected to the intake flow detector 44, and the discharged compressed air will be sent into the interior of the equipment, and the environment detector 45, intake pressure sensor 46 and dew point transmitter 47 are arranged on the outside of the adapter plate 43 to obtain the quality of the compressed air in time, and then the intake control valve 48 is connected to ensure that the compressed air can enter the interior of the buffer tank 4 without backflow, and the compressed air will be buffered in the buffer tank 4 so that it will not produce a large amount of peak flow, thereby ensuring the stability of the measurement, and the buffer tank 4 is connected to the transition control valve 55 through the second connecting pipe 57, wherein the transition control valve 55 can be adjusted according to the displacement size to ensure that the transition control valve 55 body will not become a limiting adjustment during the displacement test, and at the same time the buffer tank 4 and The test tanks 31 are arranged in parallel, which can solve the problem of occupying space during the test process and reduce the space occupied. The compressed air enters the interior of the test tank 31 through the second connecting pipe 57, and a safety valve 32 is installed at the upper top of the test tank 31, so that the pressure inside the test tank 31 can be observed in real time. A first connecting pipe 5 and a leakage control valve 53 are also provided on the outer wall of the test tank 31, and the leakage control valve 53 is connected to the muffler 54 through a leakage flow detector 52 for detecting the leakage flow, which can reduce the generation of noise during use, and can also adjust the air pressure in the test tank 31 to maintain the output pressure of the air supply unit during the test process, and a drainage pipe 35 and a high-pressure ball valve 36 are provided at the drainage ends of the buffer tank 4 and the test tank 31, which can discharge the liquid inside to avoid accumulation inside.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. Rail transit train air supply unit test system, characterized in that: It includes a chassis body, a detection component, a control component and a controller. The chassis body includes an air intake pipe group, a buffer tank, a transition pipe group and a test tank. The air intake pipe group is used to connect the device to be tested and the buffer tank, and the transition pipe group is used to connect the buffer tank and the test tank. The detection assembly includes an environment detection group and a flow state detection group, the environment detection group includes a temperature detection unit and a humidity detection unit, and the flow state detection group includes a flow detection unit and an air pressure detection unit; The control assembly includes an inlet flow control component, a transition control component and a leakage flow control component, wherein the inlet flow control component is installed on the test tube group, the transition control component is installed on the transition tube group, and the leakage flow control component is installed on the test tank; The controller is configured with a control strategy, the control strategy comprising: Step S1, receiving a test task, and calling corresponding control instructions, dynamic trigger conditions and macro end conditions according to the test task; Step S2, controlling the control component to work through the control instruction, and obtaining corresponding detection information through the detection component; Step S3, calculating the feedback deviation corresponding to the detection information through the detection feedback algorithm; Step S4, matching the corresponding dynamic trigger condition according to the feedback deviation and calling the next control instruction according to the dynamic trigger condition; Step S5, judging whether the macro end condition is met, if the macro end condition is not met, returning to step S2, if the macro end condition is met, outputting the corresponding test result; the controller is pre-configured with a trigger database, the trigger database stores a number of control instruction networks, each of the control instruction networks is used as a connection pointer between control instructions through a dynamic trigger condition, each control instruction corresponds to at least two connection pointers pointing to other control instructions, the control instruction network is indexed by the test task value, and the step S1 is also configured with a preset task value calculation algorithm to calculate the corresponding test task value; The task value calculation algorithm is configured as follows: ,in, is the test task value corresponding to the test task, is a preset static adjustment weight, Adjust the weights for the air supply unit types in the test task. Adjust the weights for the preset types, The deviation adjustment weight corresponding to the historical test deviation in the test task, Adjust the weights for the preset biases, is the benchmark test value corresponding to the i-th test item in the test task, and the benchmark test value is obtained by querying a preset benchmark test table, is the total number of test items in the test task; The detection feedback algorithm includes: , , , ,in, is the feedback bias, is the flow deviation rate, is the preset buffer deviation weight, is the buffer deviation value, is the preset test bias weight, is the test deviation value, is the flow rate abnormality ratio, which corresponds to the state of the control component, is the maximum flow deviation of the flow detection unit, is the preset reference flow deviation, is the preset reference flow base value, It is the detection fluctuation waveform of the air pressure detection unit corresponding to the buffer tank. To detect the starting time, To detect the end time, is a buffer fitting function corresponding to the buffer tank, the buffer fitting function is pre-stored in a buffer fitting table, and is indexed by buffer environment information, the buffer environment information includes buffer temperature data fed back by a temperature detection unit corresponding to the buffer tank and buffer humidity data fed back by a humidity detection unit corresponding to the buffer tank, is the preset buffer pressure reference waveform. It is the detection fluctuation waveform of the air pressure detection unit corresponding to the test tank. is a test fitting function corresponding to the test tank, the test fitting function is pre-stored in a test fitting table, and is indexed by test environment information, the test environment information includes test temperature data fed back by a temperature detection unit corresponding to the test tank and test humidity data fed back by a humidity detection unit corresponding to the test tank, is the preset test pressure reference waveform, and t is the actual time; The test tank is connected to a leakage pipe group, the flow detection unit includes a transition flow detection unit, an intake flow detection unit and a leakage flow detection unit, the transition flow detection unit is installed in the transition pipe group, the leakage flow detection unit is installed in the leakage pipe group, the intake flow detection unit is installed in the intake pipe group, and the maximum flow deviation is calculated by the following formula: ,in, is the instantaneous maximum flow rate fed back by the intake flow detection unit, is the instantaneous minimum flow rate fed back by the transition flow detection unit, is the instantaneous maximum flow rate fed back by the transition flow detection unit, It is the instantaneous minimum flow rate fed back by the leakage flow detection unit.

2. The rail transit train air supply unit test system according to claim 1, characterized in that: The test task includes several test items, and the macro end condition is configured to configure a test trigger threshold for each test item. Each control instruction has different test trigger configuration values ​​corresponding to different test items. When the control instruction is completed, the corresponding test trigger configuration value is accumulated. When the test trigger configuration values ​​corresponding to all test items are respectively greater than the corresponding test trigger thresholds, the macro end condition is deemed to be met.

3. The rail transit train air supply unit test system according to claim 1, characterized in that: The inlet control component, transition control component and leakage control component are all configured as solenoid valves, and the control instruction includes an opening adjustment item, which corresponds to the opening of the inlet control component, transition control component and leakage control component during the test.

4. The rail transit train air supply unit test system according to claim 1, characterized in that: The temperature detection unit includes an external temperature detection unit, a buffer temperature detection unit and a test temperature detection unit. The external temperature detection unit is used to detect the external environmental temperature, the buffer temperature detection unit is used to detect the temperature inside the buffer tank, and the test temperature detection unit is used to detect the temperature inside the test tank; the humidity detection unit includes an external humidity detection unit, a buffer humidity detection unit and a test humidity detection unit. The external humidity detection unit is used to detect the external environmental humidity, the buffer humidity detection unit is used to detect the humidity inside the buffer tank, and the test humidity detection unit is used to detect the humidity inside the test tank.

5. The rail transit train air supply unit test system according to claim 4, characterized in that: The buffer temperature data includes the time lag relationship between the external temperature and the temperature change inside the buffer tank, the buffer humidity data includes the time lag relationship between the external humidity and the humidity change inside the buffer tank, the test temperature data includes the time lag relationship between the external temperature and the temperature inside the test tank, and the test humidity data includes the time lag relationship between the external humidity and the humidity inside the test tank.

6. The rail transit train air supply unit test system according to claim 1, characterized in that: Each of the dynamic trigger conditions is configured with a corresponding trigger value range. When the feedback deviation falls within the corresponding trigger value range, the dynamic trigger condition is deemed to be satisfied.

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