High-low temperature low air pressure test box air pressure control method, device, system, equipment and medium

Abstract

The application relates to a high-low-temperature-low-gas-pressure test box gas pressure control method, device, system, equipment and medium, which is applied to the technical field of high-low-temperature-low-gas-pressure test box gas pressure regulation, the high-low-temperature-low-gas-pressure test box is connected with a pressure relief channel, a rapid pressure reduction channel and a slow pressure reduction channel, the method comprises the following steps: acquiring a detection gas pressure value in the high-low-temperature-low-gas-pressure test box; acquiring a preset gas pressure value based on the material attribute of a to-be-tested test piece; determining a regulation strategy based on the detection gas pressure value and the preset gas pressure value; and controlling the pressure relief channel, the rapid pressure reduction channel and the slow pressure reduction channel based on the regulation strategy. The application has the effects of reducing the influence of the gas pressure drop rate on the test result of the to-be-tested test piece and improving the accuracy of the test result.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of pressure regulation of a test chamber, and in particular to a high-low-temperature-low-pressure test chamber pressure control method, device, system, equipment and medium. BACKGROUND

[0002] The high-low-temperature-low-pressure test chamber is mainly applied in the fields of aviation, aerospace, information and electronics, and is used for detecting the environmental adaptability and reliability of instruments, electrical products, materials, parts and equipment under the action of low pressure, high-low-temperature-low pressure and low-temperature-low pressure, so as to determine whether the instruments, electrical products, materials, parts and equipment are qualified.

[0003] When the high-low-temperature-low-pressure test chamber is used to test a test piece, the vacuum pump is first controlled to start, and then the valve connected between the vacuum pump and the test chamber is opened, so that the pressure in the test chamber is in a negative pressure state. However, when some test pieces are detected, the pressure in the test chamber needs to be linearly decreased at a certain decreasing rate. If the pressure in the test chamber does not decrease at the specified linear rate, the accuracy of the test result of the test piece will be affected, thereby affecting the analysis of the environmental adaptability and reliability of the test piece. SUMMARY

[0004] In order to reduce the influence of the pressure decreasing rate on the test result of the test piece and improve the accuracy of the test result, the application provides a high-low-temperature-low-pressure test chamber pressure control method, device, system, equipment and medium.

[0005] In a first aspect, the application provides a high-low-temperature-low-pressure test chamber pressure control method, which adopts the following technical scheme:

[0006] A high-low-temperature-low-pressure test chamber pressure control method, wherein the high-low-temperature-low-pressure test chamber is connected with a pressure relief channel, a rapid pressure reduction channel and a slow pressure reduction channel, and the method comprises the following steps:

[0007] obtaining a detection pressure value in the high-low-temperature-low-pressure test chamber;

[0008] obtaining a preset pressure value based on the material properties of the test piece;

[0009] determining an adjustment strategy based on the detection pressure value and the preset pressure value;

[0010] controlling the pressure relief channel, the rapid pressure reduction channel and the slow pressure reduction channel based on the adjustment strategy.

[0011] By adopting the technical scheme, when a high-low-temperature-low-pressure test is performed on a test piece, a preset pressure value of the test piece is obtained according to a material attribute of the test piece, and then the pressure in the test box is controlled to decrease at a set rate. During the pressure decrease, the pressure in the high-low-temperature-low-pressure test box and the pressure decrease rate are monitored in real time. If the pressure decrease rate is inconsistent with the preset decrease rate, the pressure relief channel, the rapid pressure decrease channel and the slow pressure decrease channel are controlled, so that the actual pressure decrease rate is consistent with the set decrease rate, thereby reducing the influence of the pressure decrease rate on the test result of the test piece and improving the accuracy of the test result.

[0012] Optionally, the adjusting strategy is determined based on the detected pressure value and the preset pressure value, and the adjusting strategy comprises:

[0013] If the detected pressure value and the preset pressure value satisfy a first judgment condition and / or a second judgment condition, the adjusting strategy comprises a first adjusting strategy.

[0014] The first judgment condition comprises that the detected pressure value is in an upward trend and a difference between the detected pressure value and the preset pressure value is greater than a first preset difference value.

[0015] The second judgment condition comprises that a difference between the detected pressure value and the preset pressure value is greater than a second preset difference value.

[0016] The first adjusting strategy comprises controlling the pressure relief channel to be turned on.

[0017] Optionally, the adjusting strategy is determined based on the detected pressure value and the preset pressure value, and the adjusting strategy comprises:

[0018] If a relationship between the detected pressure value and the preset pressure value satisfies at least one of a third judgment condition, a fourth judgment condition and a fifth judgment condition, the adjusting strategy comprises a second adjusting strategy.

[0019] The third judgment condition comprises that a difference between the detected pressure value and the preset pressure value is greater than a third preset difference value.

[0020] The fourth judgment condition comprises that a preset decrease rate of the detected pressure value is greater than a standard decrease rate, a difference between the detected pressure value and the preset pressure value is greater than a fourth preset difference value, and the detected pressure value is in a downward trend.

[0021] The fifth judgment condition comprises that a difference between the detected pressure value and the preset pressure value is greater than a fifth preset difference value, and the detected pressure value is in the preset pressure interval.

[0022] The second adjusting strategy comprises controlling the rapid pressure decrease channel to be turned on.

[0023] Optionally, the determining the adjustment strategy based on the detected air pressure value and the preset air pressure value comprises:

[0024] If the relationship between the detected air pressure value and the preset air pressure value satisfies the sixth judgment condition and / or the seventh judgment condition, the adjustment strategy comprises a third adjustment strategy;

[0025] The sixth judgment condition comprises that a preset descending rate of the detected air pressure value is within a standard descending rate interval and the detected air pressure value presents a descending trend;

[0026] The seventh judgment condition comprises that a difference between the detected air pressure value and the preset air pressure value is greater than a sixth preset difference value;

[0027] The third adjustment strategy comprises controlling the slow decompression channel to be turned on.

[0028] Optionally, the method further comprises:

[0029] If the detected air pressure value at a current time is greater than the detected air pressure value at a previous time, it is determined that the detected air pressure value presents an ascending trend;

[0030] If the detected air pressure value at the current time is less than the detected air pressure value at the previous time, it is determined that the detected air pressure value presents a descending trend.

[0031] By using the above technical solution, through real-time detection of the detected air pressure value, the air pressure can be monitored in real time according to the change of the air pressure at each time, so as to realize instant control of the air pressure in the test chamber, and further improve the accuracy of the test result.

[0032] In a second aspect, the application provides a high-low temperature low-air-pressure test chamber air pressure control device, which adopts the following technical solution:

[0033] A high-low temperature low-air-pressure test chamber air pressure control device comprises:

[0034] A first acquisition module is configured to acquire a detected air pressure value in the high-low temperature low-air-pressure test chamber;

[0035] A second acquisition module is configured to acquire a preset air pressure value based on a test purpose;

[0036] A determination module is configured to determine an adjustment strategy based on the detected air pressure value and the preset air pressure value;

[0037] A control module is configured to control the pressure relief channel, the fast decompression channel and the slow decompression channel based on the adjustment strategy.

[0038] In a third aspect, the application provides a control terminal, which adopts the following technical solution:

[0039] A control terminal comprising a memory and a processor, the memory storing a computer program capable of being loaded and executed by the processor to perform the high-low temperature low-gas pressure test chamber pressure control method of any one of the first aspect.

[0040] In a fourth aspect, the application provides a high-low temperature low-gas pressure test chamber pressure control system, which adopts the following technical solution:

[0041] A high-low temperature low-gas pressure test chamber pressure control system, comprising: a high-low temperature low-gas pressure test chamber, a control terminal as described in the third aspect, a gas pressure detection device arranged in the high-low temperature low-gas pressure test chamber, a pressure relief channel connected to the high-low temperature low-gas pressure test chamber, a rapid pressure reduction channel, and a slow pressure reduction channel, further comprising a vacuum pump connected to the rapid pressure reduction channel and the slow pressure reduction channel, respectively.

[0042] The pressure relief channel comprises a pressure relief pipeline connected to the high-low temperature test chamber and a pressure relief valve arranged on the pressure relief pipeline; the rapid pressure reduction channel comprises a rapid pressure reduction pipeline connected to the test chamber and a rapid pressure reduction valve arranged on the rapid pressure reduction pipeline; the slow pressure reduction channel comprises a slow pressure reduction pipeline connected to the test chamber and a slow pressure reduction valve arranged on the slow pressure reduction pipeline.

[0043] The pressure relief valve, the rapid pressure reduction valve, the slow pressure reduction valve, the vacuum pump, and the gas pressure detection device are electrically connected to the control terminal.

[0044] The gas pressure detection device is used to collect the gas pressure value in the high-low temperature low-gas pressure test chamber and send it to the control terminal.

[0045] The control terminal is used to receive the gas pressure value collected by the gas pressure detection device and control the pressure relief valve, the rapid pressure reduction valve, the slow pressure reduction valve, and the vacuum pump.

[0046] The vacuum pump is used to reduce the gas pressure in the high-low temperature low-gas pressure test chamber.

[0047] When the pressure relief channel is turned on, the gas pressure in the high-low temperature low-gas pressure test chamber gradually rises; when the rapid pressure reduction channel is turned on and / or the slow pressure reduction channel is turned on, the vacuum pump is in communication with the high-low temperature low-gas pressure test chamber, and when the vacuum pump is running, the gas pressure in the high-low temperature low-gas pressure test chamber decreases.

[0048] Optionally, the diameter of the rapid pressure reduction pipeline is greater than the diameter of the slow pressure reduction pipeline.

[0049] By adopting the above technical solution, when the rapid pressure reduction pipeline is turned on, the vacuum pump is in communication with the high-low temperature low-gas pressure test chamber through the rapid pressure reduction channel, and the vacuum pump can rapidly reduce the gas pressure in the high-low temperature low-gas pressure test chamber.

[0050] In a fifth aspect, the present application provides a computer readable storage medium, adopting the technical scheme as follows:

[0051] A computer readable storage medium, storing a computer program capable of being loaded and executed by a processor to perform the high-low temperature low-gas pressure test chamber pressure control method according to any one of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 is a structural schematic diagram of a high-low temperature low-gas pressure test chamber pressure control system provided by an embodiment of the present application.

[0053] Figure 2 is a structural block diagram of a high-low temperature low-gas pressure test chamber pressure control system provided by an embodiment of the present application.

[0054] Figure 3 is a flowchart of a high-low temperature low-gas pressure test chamber pressure control method provided by an embodiment of the present application.

[0055] Figure 4 is a structural block diagram of a high-low temperature low-gas pressure test chamber pressure control device provided by an embodiment of the present application.

[0056] Figure 5 is a structural block diagram of a control terminal provided by an embodiment of the present application.

[0057] BRIEF DESCRIPTION OF DRAWINGS 1, high-low temperature low-gas pressure test chamber; 2, control terminal; 3, pressure detection device; 4, pressure relief channel; 41, pressure relief pipeline; 42, pressure relief valve; 5, rapid pressure reduction channel; 51, rapid pressure reduction pipeline; 52, rapid pressure reduction valve; 6, slow pressure reduction channel; 61, slow pressure reduction pipeline; 62, slow pressure reduction valve; 7, vacuum pump. DETAILED DESCRIPTION

[0058] The present application will be further described in detail below with reference to the accompanying drawings.

[0059] The present application provides a high-low temperature low-gas pressure test chamber pressure control method, which is applied to a high-low temperature low-gas pressure test chamber pressure control system, referring to Figure 1 and Figure 2 A high-low temperature low-gas pressure test chamber pressure control system includes a high-low temperature low-gas pressure test chamber 1, a control terminal 2, a pressure detection device 3 arranged in the high-low temperature low-gas pressure test chamber, a pressure relief channel 4 connected with the high-low temperature low-gas pressure test chamber 1, a rapid pressure reduction channel 5 and a slow pressure reduction channel 6, and a vacuum pump 7 connected with one end of the rapid pressure reduction channel 5 away from the high-low temperature low-gas pressure test chamber 1 and one end of the slow pressure reduction channel 6 away from the high-low temperature low-gas pressure test chamber.

[0060] The air pressure detection device 3 is used for collecting the air pressure value in the high-low temperature low air pressure test chamber 1 and sending to the control terminal 2;

[0061] The control terminal 2 is used for receiving the air pressure value collected by the air pressure detection device 3 and controlling the pressure relief channel 4, the rapid pressure reduction channel 5, the slow pressure reduction channel 6 and the vacuum pump 7;

[0062] The vacuum pump 7 is used for reducing the air pressure in the high-low temperature low air pressure test chamber 1.

[0063] In the embodiment, the control terminal 2 can be a mobile phone, a desktop computer or a programmable logic control terminal with a touch screen.

[0064] In the embodiment, the pressure relief channel 4 comprises a pressure relief pipeline 41 connected with the high-low temperature low air pressure test chamber 1 and a pressure relief valve 42 arranged on the pressure relief pipeline 41; the rapid pressure reduction channel 5 comprises a rapid pressure reduction pipeline 51 connected with the high-low temperature low air pressure test chamber 1 and a rapid pressure reduction valve 52 arranged on the rapid pressure reduction pipeline 51; the slow pressure reduction channel 6 comprises a slow pressure reduction pipeline 61 connected with the high-low temperature low air pressure test chamber 1 and a slow pressure reduction valve 62 arranged on the slow pressure reduction pipeline 61; the pressure relief valve 42, the rapid pressure reduction valve 52, the slow pressure reduction valve 62, the vacuum pump 7 and the air pressure detection device 3 are electrically connected with the control terminal 2.

[0065] In the embodiment, the diameter of the rapid pressure reduction pipeline 51 is greater than that of the slow pressure reduction pipeline 61; when the actual air pressure reduction rate is lower than the preset air pressure reduction rate, the control terminal 2 can control the rapid pressure reduction channel 5 to be turned on, so as to increase the air pressure reduction rate; when the actual air pressure reduction rate is higher than the preset air pressure reduction rate, the control terminal 2 can control the slow pressure reduction channel 6 to be turned on, so as to reduce the air pressure reduction rate.

[0066] When the pressure relief channel 4 is turned on, the high-low temperature low air pressure test chamber 1 is in communication with the external environment, and the air pressure in the high-low temperature low air pressure test chamber 1 gradually rises; when the vacuum pump 7 is running and the rapid pressure reduction channel 5 and / or the slow pressure reduction channel 6 is turned on, the vacuum pump 7 extracts the air in the high-low temperature low air pressure test chamber 1, so as to reduce the air pressure in the high-low temperature low air pressure test chamber 1.

[0067] When the test sample is tested, the air pressure detection device 3 collects the air pressure value in the high-low temperature low air pressure test chamber 1 and sends to the control terminal 2, the control terminal 2 executes the high-low temperature low air pressure test chamber air pressure control method to control the pressure relief channel 4, the rapid pressure reduction channel 5 and the slow pressure reduction channel 6 according to the collected air pressure value, and through the cooperation of the pressure relief channel 4, the rapid pressure reduction channel 5 and the slow pressure reduction channel 6, the air pressure in the high-low temperature low air pressure test chamber 1 is reduced at the preset air pressure reduction rate, so as to reduce the influence of the air pressure reduction rate on the test result and improve the accuracy of the test result.

[0068] The embodiment of the present application provides a kind of high-low temperature low gas pressure test chamber gas pressure control method. Refer to Figure 3 The main process of the method is described as follows (steps S101-S104):

[0069] Step S101, the detection gas pressure value in high-low temperature low gas pressure test chamber is acquired.

[0070] Specifically, in the embodiment, since high-low temperature low gas pressure test chamber 1 box is a relatively closed environment, it can be defaulted that the gas pressure of each place in high-low temperature low gas pressure test chamber 1 is equal, and the gas pressure detected by gas pressure detection device 3 represents the gas pressure in high-low temperature low gas pressure test chamber 1, the gas pressure in high-low temperature low gas pressure test chamber 1 is detected by gas pressure detection device 3 in high-low temperature low gas pressure test chamber 1, and the detection gas pressure value is input into control terminal 2, so that control terminal 2 acquires the detection gas pressure value in high-low temperature low gas pressure test chamber 1.

[0071] Step S102, the preset gas pressure value is acquired based on the material attribute of the test piece to be detected.

[0072] Specifically, since different test pieces to be detected are made of different materials, the preset gas pressure values set for different test pieces to be detected are also different, so before detecting the test piece to be detected, the material attribute and the preset gas pressure value corresponding to the material attribute can be established according to different material attributes and the preset gas pressure value corresponding to the material attribute, and when setting the preset gas pressure value of the test piece to be detected, the preset gas pressure value similar to the material attribute of the test piece to be detected in the material attribute and the preset gas pressure value table can be called, which is more convenient.

[0073] In the embodiment, the test piece to be detected can be an instrument, and can also be an electronic product or an electrical component.

[0074] Step S103, the adjustment strategy is determined based on the detection gas pressure value and the preset gas pressure value.

[0075] Specifically, if the detection gas pressure value and the preset gas pressure value satisfy the first judgment condition and / or the second judgment condition, the adjustment strategy includes the first adjustment strategy;

[0076] The first judgment condition includes that the detection gas pressure value shows an upward trend, and the difference between the detection gas pressure value and the preset gas pressure value is greater than a first preset difference value;

[0077] The second judgment condition includes that the difference between the detection gas pressure value and the preset gas pressure value is greater than a second preset difference value;

[0078] The first adjustment strategy includes controlling the conduction of pressure relief channel 4.

[0079] As a preferred mode in the embodiment, taking the electrical component as an example, when the electrical component is tested, the preset air pressure value of the electrical component is 20 KPa, the first preset difference value is 0.1 KPa, and the second preset difference value is 0.3 KPa.

[0080] When the detection air pressure value is 20.5 KPa and the detection air pressure value shows an upward trend, the difference between the detection air pressure value and the preset air pressure value is greater than the first preset difference value and the second preset difference value, the first judgment condition and the second judgment condition are satisfied, at this time, the control terminal executes the first adjustment strategy, controls the pressure relief channel 4 to open, thereby adjusting the air pressure drop rate of the high-low temperature low air pressure test chamber, and further making the air pressure in the high-low temperature low air pressure test chamber drop according to the preset drop rate.

[0081] In another possible implementation, the adjustment strategy is determined based on the detection air pressure value and the preset air pressure value, and the adjustment strategy includes:

[0082] If the relationship between the detection air pressure value and the preset air pressure value satisfies at least one of the third judgment condition, the fourth judgment condition and the fifth judgment condition, the adjustment strategy includes the second adjustment strategy;

[0083] The third judgment condition includes that the difference between the detection air pressure value and the preset air pressure value is greater than a third preset difference value;

[0084] The fourth judgment condition includes that the preset drop rate of the detection air pressure value is greater than a standard drop rate, the difference between the detection air pressure value and the preset air pressure value is greater than a fourth preset difference value, and the detection air pressure value shows a downward trend;

[0085] The fifth judgment condition includes that the difference between the detection air pressure value and the preset air pressure value is greater than a fifth preset difference value, and the detection air pressure value is in a second air pressure interval;

[0086] The second adjustment strategy includes controlling the fast pressure reduction channel 5 to be turned on.

[0087] Taking the electrical component as an example, when the electrical component is tested, the preset air pressure value of the electrical component is 20 KPa, the third preset difference value is 3.7 KPa, the fourth preset difference value is 2.3 KPa, the fifth preset difference value is 0.4 KPa, the standard drop rate is 5 KPa / min, and the second air pressure interval is 0.01 KPa-27 KPa.

[0088] When the detection air pressure value is 23 KPa, the preset drop rate is 4 KPa / min and shows a downward trend, the difference between the detection air pressure value and the preset air pressure value is 53P, the difference between the detection air pressure value and the preset air pressure value is greater than the fourth preset difference value and the fifth preset difference value, but the preset drop rate is less than the standard drop rate, so at this time, the fifth judgment condition is satisfied, the control terminal executes the second adjustment strategy, that is, the control terminal controls the fast pressure reduction channel 5 to be turned on.

[0089] In another possible implementation, the adjustment strategy is determined based on the detected air pressure value and the preset air pressure value, including:

[0090] If the relationship between the detected air pressure value and the preset air pressure value meets the sixth judgment condition and / or the seventh judgment condition, the adjustment strategy includes a third adjustment strategy;

[0091] The sixth judgment condition includes that the preset descending rate of the detected air pressure value is within the standard descending rate interval and the detected air pressure value is in a descending trend;

[0092] The seventh judgment condition includes that the difference between the detected air pressure value and the preset air pressure value is greater than a sixth preset difference value;

[0093] The third adjustment strategy includes controlling the slow pressure reduction channel 6 to be turned on.

[0094] Taking the electrical component as an example, when the electrical component is tested, the preset air pressure value of the electrical component is 20 KPa, the standard descending rate interval is 0.01-1.1 KPa / min, and the sixth preset difference value is 0.8 KPa.

[0095] When the detected air pressure value is 40 KPa, the preset descending rate is 4 KPa / min, and the detected air pressure value is in a descending trend, the difference between the detected air pressure value and the preset air pressure value is 20 KPa, the difference between the detected air pressure value and the preset air pressure value is greater than the sixth preset difference value, the preset descending rate of the detected air pressure value is within the standard descending rate interval, and the detected air pressure value is in a descending trend, the sixth judgment condition and the seventh judgment condition are met, and the control terminal executes the third adjustment strategy, that is, the slow pressure reduction channel 6 is controlled to be turned on.

[0096] Further, in the embodiment, if the detected air pressure value at the current time is greater than the detected air pressure value at the last time, it is determined that the detected air pressure value is in an ascending trend;

[0097] If the detected air pressure value at the current time is less than the detected air pressure value at the last time, it is determined that the detected air pressure value is in a descending trend.

[0098] Specifically, when the detected air pressure value in the high-low temperature and low air pressure test chamber is obtained, the air pressure detection device is in a real-time detection state. By comparing the detected air pressure value at the current time with the detected air pressure value at the last time, the air pressure change in the high-low temperature and low air pressure test chamber can be understood in time, so that the air pressure change in the high-low temperature and low air pressure test chamber can be better controlled, and the test result of the test piece to be tested is more accurate.

[0099] Step S104, controlling the pressure relief channel, the fast pressure reduction channel and the slow pressure reduction channel based on the adjustment strategy.

[0100] As a preferred mode in the embodiment, taking the electrical component as an example, when the electrical component is tested, the preset air pressure value of the electrical component is 20 KPa, the first preset difference value is 0.1 KPa, the second preset difference value is 0.3 KPa, the third preset difference value is 3.7 KPa, the fourth preset difference value is 2.3 KPa, the fifth preset difference value is 0.4 KPa, the sixth preset difference value is 0.8 KPa, the preset air pressure interval is 0.01-27 KPa, and the preset falling rate interval is 0.01-110 KPa / min.

[0101] When the detection air pressure value in the high-low temperature and low air pressure test box is 20.5 KPa, the instantaneous falling rate of the air pressure is 7 KPa / min, and the detection air pressure value shows an upward trend, the difference between the detection air pressure value and the preset air pressure value is greater than the second preset difference value, at this time, the detection air pressure value and the preset air pressure value meet the second judgment condition and the fifth judgment condition, the adjustment strategy includes the first adjustment strategy and the second adjustment strategy, and the control terminal controls the pressure relief channel 4 and the fast pressure relief channel 5 to be turned on and the slow pressure relief channel 6 to be turned off according to the first adjustment strategy and the second adjustment strategy.

[0102] When the detection air pressure value in the high-low temperature and low air pressure test box is 22 KPa, the instantaneous falling rate of the air pressure is 4 KPa / min, and the detection air pressure value shows a downward trend, the difference between the detection air pressure value and the preset air pressure value is greater than the second preset difference value, the fifth preset difference value and the sixth preset difference value, at this time, the detection air pressure value, the preset air pressure value and the instantaneous falling rate of the air pressure meet the second judgment condition, the fifth judgment condition, the sixth judgment condition and the seventh judgment condition, so the adjustment strategy includes the first adjustment strategy, the second adjustment strategy and the third adjustment strategy, and the control terminal controls the pressure relief channel 4, the fast pressure relief channel 5 and the slow pressure relief channel 6 to be turned on according to the first adjustment strategy, the second adjustment strategy and the third adjustment strategy.

[0103] When the detection air pressure value in the high-low temperature and low air pressure test box is 20.4 KPa, the instantaneous falling rate of the air pressure is 4 KPa / min, and the detection air pressure value shows a downward trend, the difference between the detection air pressure value and the preset air pressure value is 0.4 KPa, at this time, the detection air pressure value and the preset air pressure value meet the second judgment condition and the sixth judgment condition, the adjustment strategy includes the first adjustment strategy and the second adjustment strategy, and the control terminal controls the fast pressure relief channel 5 to be turned off, and controls the pressure relief channel 4 and the slow pressure relief channel 6 to be turned on according to the first adjustment strategy and the second adjustment strategy.

[0104] The embodiment of the application further provides a high-low temperature and low air pressure test box air pressure control device. Referring to Figure 4The high-low temperature and low-pressure test box pressure control device 200 comprises:

[0105] The first acquisition module 201 is configured to acquire a detection pressure value in the high-low temperature and low-pressure test box.

[0106] The second acquisition module 202 is configured to acquire a preset pressure value based on a test purpose.

[0107] The determination module 203 is configured to determine an adjustment strategy based on the detection pressure value and the preset pressure value.

[0108] The control module 204 is configured to control the pressure relief channel, the rapid pressure reduction channel and the slow pressure reduction channel based on the adjustment strategy.

[0109] As an optional implementation of the embodiment, the determination module 203 is specifically configured to, if the detection pressure value and the preset pressure value satisfy a first judgment condition and / or a second judgment condition, the adjustment strategy comprises a first adjustment strategy; the first judgment condition comprises that the detection pressure value presents an upward trend and a difference between the detection pressure value and the preset pressure value is greater than a first preset difference; the second judgment condition comprises that the difference between the detection pressure value and the preset pressure value is greater than a second preset difference; and the first adjustment strategy comprises controlling the pressure relief channel to be turned on.

[0110] As an optional implementation of the embodiment, the determination module 203 is specifically configured to, if a relationship between the detection pressure value and the preset pressure value satisfies at least one of a third judgment condition, a fourth judgment condition and a fifth judgment condition, the adjustment strategy comprises a second adjustment strategy; the third judgment condition comprises that the difference between the detection pressure value and the preset pressure value is greater than a third preset difference; the fourth judgment condition comprises that an instantaneous drop rate of the detection pressure value is greater than a preset drop rate, the difference between the detection pressure value and the preset pressure value is greater than a fourth preset difference and the detection pressure value presents a downward trend; the fifth judgment condition comprises that the difference between the detection pressure value and the preset pressure value is greater than a fifth preset difference and the detection pressure value is in a preset pressure interval; and the second adjustment strategy comprises controlling the rapid pressure reduction channel to be turned on.

[0111] As an optional implementation of the embodiment, the determination module 203 is specifically configured to, if the relationship between the detection pressure value and the preset pressure value satisfies a sixth judgment condition and / or a seventh judgment condition, the adjustment strategy comprises a third adjustment strategy; the sixth judgment condition comprises that the instantaneous drop rate of the detection pressure value is in a preset drop rate interval and the detection pressure value presents a downward trend; the seventh judgment condition comprises that the difference between the detection pressure value and the preset pressure value is greater than a sixth preset difference; and the third adjustment strategy comprises controlling the slow pressure reduction channel to be turned on.

[0112] As an optional implementation of the embodiment, the high-low temperature and low-pressure test box pressure control device further comprises:

[0113] The detecting air pressure rising module is specifically configured to determine that the detecting air pressure value is in a rising trend if the detecting air pressure value at the current time is greater than the detecting air pressure value at the previous time.

[0114] The detecting air pressure falling module is specifically configured to determine that the detecting air pressure value is in a falling trend if the detecting air pressure value at the current time is less than the detecting air pressure value at the previous time.

[0115] In one example, the modules in any of the above apparatuses can be one or more integrated circuits configured to implement the above methods, for example, one or more application specific integrated circuits (ASICs), or one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.

[0116] For another example, when the modules in the apparatus can be implemented in the form of a processing element scheduler, the processing element can be a general purpose processor, such as a central processing unit (CPU) or other processor that can invoke programs. For another example, the modules can be integrated together to be implemented in the form of a system-on-a-chip (SOC).

[0117] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the apparatuses and modules described above can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0118] The embodiments of the present application also provide a control terminal, which refers to Figure 5 The control terminal 300 includes a processor 301 and a memory 302, and can further include one or more of an information input / output (I / O) interface 303, a communication component 304, and a communication bus 305.

[0119] The processor 301 is configured to control overall operations of the control terminal 300 to complete all or part of the steps of the high-low temperature low-pressure test chamber pressure control method described above. The memory 302 is configured to store various types of data to support the operation of the control terminal 300. For example, the data can include instructions for any application or method operating on the control terminal 300, and application-related data. The memory 302 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as one or more of a static random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic memory, a flash memory, a magnetic disk, or an optical disk.

[0120] The I / O interface 303 provides an interface between the processor 301 and other interface modules, which can be a keyboard, a mouse, a button, and the like. These buttons can be virtual buttons or physical buttons. The communication component 304 is configured to control wired or wireless communication between the control terminal 300 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, near field communication (NFC), 2G, 3G, or 4G, or a combination of one or more of them, so the corresponding communication component 104 can include a Wi-Fi component, a Bluetooth component, and an NFC component.

[0121] The control terminal 300 can be implemented by one or more of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a control terminal, a micro control terminal, a microprocessor, or other electronic elements for executing a high-low temperature low-pressure test chamber pressure control method as described in the above embodiments.

[0122] The communication bus 305 can include a path for transmitting information between the above components. The communication bus 305 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus 305 can be divided into an address bus, a data bus, a control bus, etc.

[0123] The control terminal 300 can include, but is not limited to, a mobile terminal such as a mobile phone, a notebook, a digital broadcast receiver, a PDA (Personal Digital Assistant), a PAD (Tablet PC), a PMP (Portable Multimedia Player), a car terminal (e.g., a car navigation terminal), etc., and a stationary terminal such as a digital TV, a desktop computer, etc., and can also be a server, etc.

[0124] The embodiment of the present application also provides a computer readable storage medium, and the computer readable storage medium stores a computer program. When the computer program is executed by a processor, the steps of the high-low temperature low-pressure test chamber pressure control method described above are implemented.

[0125] The computer readable storage medium can include a U disk, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0126] The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0127] The description above merely illustrates preferred embodiments of the present application and the principles of the technology employed. It should be understood by those skilled in the art that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by the combinations of the above technical features or their equivalent features without departing from the above application concept. For example, the above technical features can be replaced with the technical features applied in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. A method for controlling the pressure of a high and low temperature low pressure test chamber, characterized by, The high-low temperature low-gas pressure test box is connected with a pressure relief channel, a rapid pressure reduction channel and a slow pressure reduction channel, the rapid pressure reduction channel comprises a rapid pressure reduction pipeline connected with the test box and a rapid pressure reduction valve arranged on the rapid pressure reduction pipeline, the slow pressure reduction channel comprises a slow pressure reduction pipeline connected with the test box and a slow pressure reduction valve arranged on the slow pressure reduction pipeline, the diameter of the rapid pressure reduction pipeline is greater than the diameter of the slow pressure reduction pipeline, and the method comprises: S101, acquiring a detection gas pressure value in the high-low temperature low-gas pressure test box; S102, acquiring a preset gas pressure value based on the material property of the test piece to be detected, wherein before detecting the test piece to be detected, a material property and preset gas pressure value table is established according to different material properties and preset gas pressure values corresponding to the material properties, and when the preset gas pressure value of the test piece to be detected is set, the preset gas pressure value close to the material property of the test piece to be detected in the material property and preset gas pressure value table is called. S103, determining an adjustment strategy based on the detection gas pressure value and the preset gas pressure value; S104, controlling the pressure relief channel, the rapid pressure reduction channel and the slow pressure reduction channel based on the adjustment strategy.

2. The method of claim 1, wherein The step S103 of determining the adjustment strategy based on the detection gas pressure value and the preset gas pressure value comprises: If the detection gas pressure value and the preset gas pressure value satisfy a first judgment condition or a second judgment condition, the adjustment strategy comprises a first adjustment strategy; the first judgment condition comprises that the detection gas pressure value presents an upward trend and the difference between the detection gas pressure value and the preset gas pressure value is greater than a first preset difference value; the second judgment condition comprises that the difference between the detection gas pressure value and the preset gas pressure value is greater than a second preset difference value, and the second preset difference value is greater than the first preset difference value; and the first adjustment strategy comprises controlling the pressure relief channel to be turned on, so that the high-low temperature low-gas pressure test box is in communication with the external environment, and the gas pressure in the high-low temperature low-gas pressure test box gradually rises.

3. The method of claim 2, wherein The step S103 of determining the adjustment strategy based on the detection gas pressure value and the preset gas pressure value further comprises: If the relationship between the detection gas pressure value and the preset gas pressure value satisfies at least one of a third judgment condition, a fourth judgment condition and a fifth judgment condition, the adjustment strategy comprises a second adjustment strategy; the third judgment condition comprises that the difference between the detection gas pressure value and the preset gas pressure value is greater than a third preset difference value; the fourth judgment condition comprises that the preset descending rate of the detection gas pressure value is greater than a standard descending rate, the difference between the detection gas pressure value and the preset gas pressure value is greater than a fourth preset difference value, and the detection gas pressure value presents a downward trend; and the fifth judgment condition comprises that the difference between the detection gas pressure value and the preset gas pressure value is greater than a fifth preset difference value, and the detection gas pressure value is in the preset gas pressure interval; The second adjustment strategy comprises controlling the rapid pressure reduction channel to be turned on.

4. The method of claim 3, wherein The step S103 of determining the adjustment strategy based on the detection gas pressure value and the preset gas pressure value further comprises: If the relationship between the detected air pressure value and the preset air pressure value meets a sixth judgment condition and a seventh judgment condition, the adjustment strategy comprises a third adjustment strategy; the sixth judgment condition comprises that a preset descending rate of the detected air pressure value is within a standard descending rate interval and the detected air pressure value presents a descending trend; the seventh judgment condition comprises that a difference between the detected air pressure value and the preset air pressure value is greater than a sixth preset difference value; The third adjustment strategy comprises controlling the slow pressure relief channel to be turned on.

5. The method of claim 1, wherein Further comprising: If the detected air pressure value at a current time is greater than the detected air pressure value at a previous time, it is determined that the detected air pressure value presents an ascending trend; If the detected air pressure value at a current time is less than the detected air pressure value at a previous time, it is determined that the detected air pressure value presents a descending trend.

6. A high-low temperature low-pressure test chamber pressure control device, characterized by, The device for executing the high-low temperature low air pressure test chamber air pressure control method as claimed in claim 1 comprises: A first acquisition module for acquiring a detected air pressure value in the high-low temperature low air pressure test chamber; A second acquisition module for acquiring a preset air pressure value based on a test purpose; A determination module for determining an adjustment strategy based on the detected air pressure value and the preset air pressure value; A control module for controlling the pressure relief channel, the fast pressure relief channel and the slow pressure relief channel based on the adjustment strategy.

7. A control terminal, characterized by comprising: The device comprises a memory and a processor, and the memory stores a computer program capable of being loaded and executed by the processor to execute the high-low temperature low air pressure test chamber air pressure control method as claimed in claim 1.

8. A high-low temperature low-pressure test chamber pressure control system, characterized by, The system comprises a high-low temperature low air pressure test chamber (1), a control terminal as claimed in claim 7, an air pressure detection device (3) arranged in the high-low temperature low air pressure test chamber (1), a pressure relief channel (4) connected with the high-low temperature test chamber, a fast pressure relief channel (5) and a slow pressure relief channel (6), and further comprises a vacuum pump (7) connected with the fast pressure relief channel (5) and the slow pressure relief channel (6) respectively; The pressure relief channel (4) comprises a pressure relief pipeline (41) connected with the high-low temperature test chamber and a pressure relief valve (42) arranged on the pressure relief pipeline (41); the fast pressure relief channel (5) comprises a fast pressure relief pipeline (51) connected with the test chamber and a fast pressure relief valve (52) arranged on the fast pressure relief pipeline (51); the slow pressure relief channel (6) comprises a slow pressure relief pipeline (61) connected with the test chamber and a slow pressure relief valve (62) arranged on the slow pressure relief pipeline (61); The pressure relief valve (42), the fast pressure relief valve (52), the slow pressure relief valve (62), the vacuum pump (7) and the air pressure detection device (3) are electrically connected with the control terminal; The air pressure detection device (3) is used for collecting an air pressure value in the high-low temperature low air pressure test chamber (1) and sending the air pressure value to the control terminal; The control terminal is used for receiving the air pressure value collected by the air pressure detection device (3) and controlling the pressure relief valve (42), the fast pressure relief valve (52), the slow pressure relief valve (62) and the vacuum pump (7); The vacuum pump (7) is used for reducing the air pressure in the high-low temperature low air pressure test chamber (1).

9. The high-low temperature low pressure test chamber pressure control system of claim 8, wherein, The diameter of the rapid decompression pipeline (51) is greater than the diameter of the slow decompression pipeline (61).

10. A computer-readable storage medium, characterized in that, The computer program capable of being loaded and executed by the processor to perform the high-low temperature low-pressure test box pressure control method of claim 1 is stored.

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