A testing system, method, device, equipment and storage medium

Abstract

The present invention discloses a test system, method, device, equipment and storage medium, relating to the technical field of fluid control. The system includes a refrigeration circuit and a circulation circuit. The refrigeration circuit is communicated with the circulation circuit through an evaporator. The circulation circuit includes a test chamber for placing a device under test, and a circulating liquid flowing through the circulation circuit provides a test environment for the device under test. The circulation circuit further includes a first regulating valve and a second regulating valve, and the first regulating valve and the second regulating valve are used to adjust the test environment. In the above technical solution, the refrigeration circuit cools the circulating liquid in the circulation circuit through the evaporator, and by adjusting the opening degrees of the first regulating valve and the second regulating valve, the liquid flow rate or liquid pressure of the circulating liquid in the test chamber is adjusted, so as to provide the device under test in the test chamber with the required test environment.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of fluid control, and in particular, to a test system, method, device, equipment, and storage medium. Background Art

[0002] When testing a device under test, it is necessary to provide the test environment required by the device under test. For example, when testing a motor, a battery pack, a semiconductor, etc., it is necessary to provide the required liquid flow rate and liquid pressure. Therefore, the control of the liquid properties of the test environment required by the device under test is particularly important.

[0003] In the prior art, the test environment provided by the test system can be adjusted by controlling a variable-frequency pump with an inverter. The test system includes two pumps, one for heat exchange and the other for adjusting liquid properties.

[0004] However, the double pumps will increase the cost, and moreover, the pumps are prone to overload at ultra-low speeds and cannot stably control the liquid properties. Summary of the Invention

[0005] The present invention provides a test system, method, device, equipment, and storage medium to provide the required test environment for the device under test.

[0006] In a first aspect, an embodiment of the present invention provides a test system, including a refrigeration circuit and a circulation circuit. The refrigeration circuit is communicated with the circulation circuit through an evaporator. The circulation circuit includes a test chamber for placing the device under test, and provides a test environment for the device under test through the circulating liquid flowing through the circulation circuit. The circulation circuit further includes a first regulating valve and a second regulating valve, and the first regulating valve and the second regulating valve are used to adjust the test environment.

[0007] The technical solution of the embodiment of the present invention provides a test system, including a refrigeration circuit and a circulation circuit. The refrigeration circuit is communicated with the circulation circuit through an evaporator. The refrigeration circuit cools the circulating liquid in the circulation circuit through the evaporator. By adjusting the opening degrees of the first regulating valve and the second regulating valve, the liquid flow rate or liquid pressure of the circulating liquid in the test chamber can be adjusted, so as to provide the required test environment for the device under test in the test chamber.

[0008] Further, the first regulating valve is connected in parallel to the test chamber. One end of the test chamber is connected to the electric heating tube in the circulation loop through the second regulating valve, and the other end is connected to the evaporator.

[0009] Further, the refrigeration loop includes a compressor, an oil separator, an air-cooled condenser, a dryer filter, an electronic expansion valve, and a regenerator connected in sequence. The regenerator is respectively connected to the compressor and the evaporator.

[0010] Further, the circulation loop further includes an expansion tank, a check valve, a gas-liquid separator, a circulation pump, and an electric heating tube. The lower end of the expansion tank is connected to one side of the gas-liquid separator through the check valve. The upper end of the gas-liquid separator is connected to the upper end of the expansion tank. The lower end of the gas-liquid separator is connected to one end of the electric heating tube through the circulation pump. The other end of the electric heating tube is connected to the evaporator through the test chamber. The evaporator is simultaneously connected to the other side of the gas-liquid separator.

[0011] Further, the circulation loop further includes a flow sensor and a pressure sensor. The flow sensor is used to determine the liquid flow rate of the circulating liquid flowing through the test chamber, and the pressure sensor is used to determine the liquid pressure of the circulating liquid flowing into the test chamber.

[0012] In a second aspect, an embodiment of the present invention further provides a test method, which is applied to a test system composed of a refrigeration loop and a circulation loop. The refrigeration loop and the circulation loop are connected through an evaporator. The circulation loop includes a test chamber for placing a device under test, a first regulating valve, and a second regulating valve. The method includes:

[0013] Determine the current liquid property of the circulating liquid in the test chamber;

[0014] Determine the initial opening degree of the first regulating valve according to the property range to which the current liquid property belongs, and adjust the opening degree of the first regulating valve to the initial opening degree;

[0015] Determine the updated liquid property of the circulating liquid in the test chamber;

[0016] Adjust the opening degree of the second regulating valve according to the updated liquid property and the target liquid property until the liquid property of the circulating liquid reaches the target liquid property.

[0017] Further, it further includes:

[0018] During the process of adjusting the opening degree of the second regulating valve, if the liquid property of the circulating liquid cannot reach the target liquid property, determine the termination liquid property of the circulating liquid in the test chamber, and use the termination liquid property as the current liquid property, then return to execute the determination of the current liquid property of the circulating liquid in the test chamber until the liquid property of the circulating liquid reaches the target liquid property.

[0019] In a third aspect, an embodiment of the present invention further provides a test device, which is loaded in a test system composed of a refrigeration circuit and a circulation circuit. The refrigeration circuit is communicated with the circulation circuit through an evaporator. The circulation circuit includes a test chamber for placing a device under test, a first regulating valve and a second regulating valve. The device includes:

[0020] A first determination module, configured to determine the current liquid property of the circulating liquid in the test chamber;

[0021] A first adjustment module, configured to determine the initial opening degree of the first regulating valve according to the property range to which the current liquid property belongs, and adjust the opening degree of the first regulating valve to the initial opening degree;

[0022] A second determination module, configured to determine the updated liquid property of the circulating liquid in the test chamber;

[0023] A second adjustment module, configured to adjust the opening degree of the second regulating valve according to the updated liquid property and the target liquid property until the liquid property of the circulating liquid reaches the target liquid property.

[0024] In a fourth aspect, an embodiment of the present invention further provides an electronic device, where the electronic device includes:

[0025] At least one processor; and a memory communicatively connected to the at least one processor;

[0026] Wherein, the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the test method described in any one of the second aspects.

[0027] In a fifth aspect, the present application further provides a storage medium containing computer-executable instructions, characterized in that the computer-executable instructions are used to execute the test method described in any one of the second aspects when executed by a computer processor.

[0028] In a sixth aspect, the present application provides a computer program product, which includes computer instructions. When the computer instructions run on a computer, the computer is enabled to execute the test method provided in the first aspect.

[0029] It should be noted that the above computer instructions can be stored in whole or in part on a computer-readable storage medium. Among them, the computer-readable storage medium can be packaged together with the processor of the test device or separately packaged from the processor of the test device. This application does not make any limitations in this regard.

[0030] For the descriptions of the second, third, fourth, fifth, and sixth aspects in this application, reference can be made to the detailed description of the first aspect; and for the beneficial effects of the descriptions of the second, third, fourth, fifth, and sixth aspects, reference can be made to the analysis of the beneficial effects of the first aspect. Details will not be elaborated here.

[0031] In this application, the names of the above test devices do not limit the devices or functional modules themselves. In actual implementation, these devices or functional modules may appear under other names. As long as the functions of each device or functional module are similar to those of this application and fall within the scope of the claims of this application and their equivalent technologies.

[0032] These aspects or other aspects of this application will be more clearly understood in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a schematic structural diagram of a test system provided by an embodiment of the present invention;

[0035] Figure 2 It is a flowchart of a test method provided by an embodiment of the present invention;

[0036] Figure 3 It is a schematic structural diagram of a test device provided by an embodiment of the present invention;

[0037] Figure 4 It is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all structures.

[0039] As used herein, the term "and / or" is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent three cases: A exists alone, both A and B exist simultaneously, and B exists alone.

[0040] The terms "first", "second", etc. in the description of the present application and the accompanying drawings are used to distinguish different objects or different treatments of the same object, rather than to describe a specific order of the objects.

[0041] In addition, the terms "comprising", "having" and any variations thereof mentioned in the description of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include other steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products or devices.

[0042] Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations (or steps) as sequential processes, many of the operations can be implemented in parallel, concurrently or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operations are completed, but it may also have additional steps not included in the drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc. In addition, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0043] It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to give examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0044] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" refers to two or more.

[0045] For the device under test, the main concerns are the flow rate and pressure of the liquid in the test environment. Therefore, the liquid properties can be understood as the liquid flow rate and liquid pressure. For the liquid flow rate and liquid pressure, there are currently two control methods. One is to adjust the test environment provided by the test system by controlling the variable-frequency pump with a frequency converter, and the other is to adjust the test environment provided by the test system by using a proportional valve. By controlling the variable-frequency pump with a frequency converter to adjust the test environment provided by the test system, the test system includes two pumps, one for heat exchange and the other for adjusting the liquid flow rate and pressure. However, the heat generated by the two pumps will affect the performance of the test system, and moreover, the two pumps will increase the cost. Also, limited by the nature of the pump itself, it is prone to overload at ultra-low speeds and cannot stably control the liquid flow rate and pressure. By using a proportional valve to adjust the test environment provided by the test system, it is generally applied in the normal temperature - high temperature range, and the required response time for adjustment is long and the adjustment accuracy is not high.

[0046] Therefore, the present application proposes a test system to provide the required test environment for the device under test.

[0047] The test system proposed in the present application will be described in detail below with reference to the drawings and embodiments.

[0048] Figure 1 The structural schematic diagram of a test system provided by an embodiment of the present invention is as Figure 1 shown. The test system includes a refrigeration circuit and a circulation circuit. The refrigeration circuit is connected to the circulation circuit through an evaporator. The circulation circuit includes a test chamber for placing the device under test, and provides a test environment for the device under test through the circulating liquid flowing through the circulation circuit. The circulation circuit also includes a first regulating valve and a second regulating valve for adjusting the test environment.

[0049] Further, the first regulating valve is connected in parallel to the test chamber. One end of the test chamber is connected to the electric heating tube in the circulation circuit through the second regulating valve, and the other end is connected to the evaporator.

[0050] Further, the refrigeration circuit includes a compressor, an oil separator, an air-cooled condenser, a drying filter, an electronic expansion valve, and a regenerator connected in sequence. The regenerator is connected to the compressor and the evaporator respectively.

[0051] Further, the circulation loop further includes an expansion tank, a check valve, a gas-liquid separator, a circulation pump, and an electric heating tube. The lower end of the expansion tank is connected to one side of the gas-liquid separator through the check valve. The upper end of the gas-liquid separator is connected to the upper end of the expansion tank. The lower end of the gas-liquid separator is connected to one end of the electric heating tube through the circulation pump. The other end of the electric heating tube is connected to the evaporator through the test chamber, and the evaporator is simultaneously connected to the other side of the gas-liquid separator.

[0052] Further, the circulation loop further includes a flow sensor and a pressure sensor. The flow sensor is used to determine the liquid flow rate of the circulating liquid flowing through the test chamber, and the pressure sensor is used to determine the liquid pressure of the circulating liquid flowing into the test chamber.

[0053] Specifically, the refrigeration circuit consists of a compressor, an oil separator, an air-cooled condenser, a dryer filter, an electronic expansion valve, and a regenerator. Pipes are provided between them to form a closed system. The refrigerant circulates in the system, continuously undergoes state changes, and exchanges heat with the coolant in the evaporator to achieve the purpose of refrigeration. The low-pressure refrigerant vapor generated in the evaporator is first sucked into the compressor and adiabatically compressed to the condensation pressure, then enters the air-cooled condenser and is cooled by air to condense into a high-pressure liquid. The refrigerant liquid adiabatically expands through the expansion valve, the pressure drops to the evaporation pressure, and at the same time the temperature drops to the evaporation temperature, becoming a gas-liquid two-phase mixture; then it enters the regenerator, and finally enters the evaporator, absorbs the heat of the coolant in the evaporator and evaporates into vapor, is sucked into the compressor, and starts to circulate again. In the whole refrigeration process, the function of the refrigeration circuit is to lower the temperature of the coolant in the evaporator and provide a low temperature for the coolant.

[0054] The circulation loop consists of an expansion tank, a check valve, a gas-liquid separator, a circulation pump, an electric heating pipe, a first regulating valve, a second regulating valve, a pressure sensor, and a flow sensor. The expansion tank is used to add liquid and expand the liquid. The lower end of the expansion tank enters the gas-liquid separator through the check valve. The check valve can prevent the liquid from flowing back into the expansion tank, avoiding the liquid in the loop from circulating into the expansion tank. In this way, only the liquid in the expansion tank comes into contact with air, reducing the risk of the coolant being oxidized and absorbing moisture. The upper end of the gas-liquid separator is connected to the top of the expansion tank, which can automatically exhaust the air in the loop and improve the stability of controlling the liquid flow rate and liquid pressure in the environment to be measured. The liquid in the circulation loop enters the gas-liquid separator through the expansion tank, flows into the circulation pump from the lower end of the gas-liquid separator, and is transported to the electric heating pipe by the circulation pump. The liquid flows through the electric heating pipe from bottom to top. During the process of the liquid flowing through the electric heating pipe, the electric heating pipe is always full of liquid, without the risk of dry burning. A second regulating valve and a pressure sensor are arranged between the electric heating pipe and the test chamber. The pressure sensor is used to determine the liquid pressure flowing into the test chamber. A flow sensor is arranged between the test chamber and the evaporator. The flow sensor is used to determine the liquid pressure flowing out of the test chamber. The first regulating valve is connected in parallel to the test chamber. At the same time, the circulation pump, the electric heating pipe, the first regulating valve, and the evaporator form a loop. The electric heating pipe is placed at the outlet of the circulation pump and can heat the coolant. The evaporator is located between the flow sensor and the gas-liquid separator.

[0055] The refrigeration loop cools the circulating liquid in the circulation loop through the evaporator.

[0056] In order to provide the environment to be measured required by the device to be tested, it is necessary to adjust the opening degrees of the first regulating valve and the second regulating valve. Specifically, first, the current liquid properties of the circulating liquid in the test chamber can be determined. It can be understood that the current liquid properties can include the current liquid flow rate or the current liquid pressure. The current liquid flow rate of the circulating liquid in the test chamber can be understood as the liquid flow rate of the circulating liquid flowing through the test chamber, and the current liquid pressure of the circulating liquid in the test chamber can be understood as the liquid pressure of the circulating liquid flowing into the test chamber.

[0057] The first regulating valve mainly adjusts the opening degree according to the interval to which the target liquid property belongs to assist the second regulating valve in controlling the liquid property. When it is determined that the liquid property is the liquid flow rate, the liquid flow rate flowing out of the test chamber can be determined based on the flow sensor, and the initial opening degree of the first regulating valve can be determined according to the flow rate interval to which the liquid flow rate belongs and the corresponding relationship between the flow rate interval and the opening degree of the first regulating valve built in the system. When it is determined that the liquid property is the liquid pressure, the liquid pressure flowing into the test chamber can be determined based on the pressure sensor, and the initial opening degree of the first regulating valve can be determined according to the pressure interval to which the liquid pressure belongs and the corresponding relationship between the pressure interval and the opening degree of the first regulating valve built in the system. Then, the opening degree of the first regulating valve can be adjusted to the initial opening degree to achieve the initial adjustment of the first regulating valve.

[0058] The liquid property is the liquid flow rate. After adjusting the opening degree of the first regulating valve to the initial opening degree, the liquid flow rate flowing out of the test chamber can be re-determined, and based on the re-determined liquid flow rate and the target liquid flow rate, the opening degree of the second regulating valve can be adjusted until the liquid flow rate flowing out of the test chamber reaches the target liquid flow rate.

[0059] The liquid property is the liquid pressure. After adjusting the opening degree of the first regulating valve to the initial opening degree, the liquid pressure flowing out of the test chamber can be re-determined, and based on the re-determined liquid pressure and the target liquid pressure, the opening degree of the second regulating valve can be adjusted until the liquid pressure flowing into the test chamber reaches the target liquid pressure.

[0060] Certainly, the opening degree of the second regulating valve can be manually adjusted to make the liquid flow rate in the test chamber reach the target liquid flow rate or the liquid pressure reach the target liquid pressure. According to the characteristics that the incremental PID output does not accumulate and the control increment is only related to the recent deviation, the manual adjustment can be directly switched to automatic adjustment, that is, the opening degree of the second regulating valve can be automatically adjusted based on the incremental PID algorithm to make the liquid flow rate in the test chamber reach the target liquid flow rate or the liquid pressure reach the target liquid pressure, realizing the seamless switching between the manual adjustment and the automatic adjustment of the second regulating valve, and ensuring that the liquid flow rate or the liquid does not have a large steep change during the entire control cycle.

[0061] In practical applications, if adjusting the opening degree of the second regulating valve cannot make the liquid flow rate in the test chamber reach the target liquid flow rate or the liquid pressure reach the target liquid pressure, the liquid flow rate or the liquid pressure can be re-determined, and the opening degree of the first regulating valve can be updated according to the flow rate interval to which the liquid flow rate belongs and the corresponding relationship between the flow rate interval and the opening degree of the first regulating valve built in the system, or the initial opening degree of the first regulating valve can be updated according to the pressure interval to which the liquid pressure belongs and the corresponding relationship between the pressure interval and the opening degree of the first regulating valve built in the system, and the opening degree of the first regulating valve can be adjusted to the initial opening degree. Then, the second regulating valve can be continuously adjusted until the liquid flow rate in the test chamber reaches the target liquid flow rate or the liquid pressure in the test chamber reaches the target liquid pressure.

[0062] The first regulating valve and the second regulating valve are electric ball valves resistant to high and low temperatures. By controlling and adjusting the two regulating valves, the liquid flow rate and the liquid pressure of the circulating liquid in the test chamber can be continuously controlled. Moreover, the electric heating tube and the evaporator are always in a state of full liquid and sufficient flow rate, ensuring the heat exchange amount of refrigeration and heating, and preventing the heat exchange from being affected by the decrease in flow rate.

[0063] The test system provided by the embodiment of the present invention includes a refrigeration circuit and a circulation circuit. The refrigeration circuit is connected to the circulation circuit through an evaporator. The refrigeration circuit cools the circulating liquid in the circulation circuit through the evaporator. The circulation circuit includes a test chamber for placing a device under test, and provides a test environment for the device under test through the circulating liquid flowing through the circulation circuit. The circulation circuit further includes a first regulating valve and a second regulating valve. By adjusting the opening degrees of the first regulating valve and the second regulating valve, the liquid flow rate or liquid pressure of the circulating liquid in the test chamber is adjusted, so as to provide the required test environment for the device under test in the test chamber.

[0064] Figure 2 FIG. is a flowchart of a test method provided by an embodiment of the present invention. This embodiment is applicable to the situation where it is necessary to provide the required test environment for a device under test. This method is applied to a test system composed of a refrigeration circuit and a circulation circuit. The refrigeration circuit is connected to the circulation circuit through an evaporator. The circulation circuit includes a test chamber for placing a device under test, a first regulating valve, and a second regulating valve, and can be executed by a test device, such as Figure 2 shown, and specifically includes the following steps:

[0065] Step 210, determine the current liquid property of the circulating liquid in the test chamber.

[0066] Specifically, when testing a device under test, it needs to be placed in the required test environment, and the test environment is often determined by the liquid property of the circulating liquid in the test chamber. The liquid property can be liquid flow rate or liquid pressure. Therefore, it is necessary to adjust the liquid flow rate or liquid pressure of the circulating liquid in the test chamber to make it reach the target liquid flow rate or target liquid pressure required by the device under test. It can be understood that first, it is necessary to determine the current liquid flow rate or current liquid pressure of the circulating liquid in the test chamber. Specifically, the liquid flow rate of the circulating liquid flowing into the test chamber can be determined based on a flow sensor, and this liquid flow rate is determined as the current liquid flow rate of the circulating liquid in the test chamber. The liquid pressure of the circulating liquid flowing out of the test chamber can be determined based on a pressure sensor, and this liquid pressure is determined as the current liquid pressure of the circulating liquid in the test chamber.

[0067] In practical applications, the obtained current liquid flow rate or current liquid pressure can be processed to reduce data errors. Specifically, the obtained current liquid flow rate or current liquid pressure can be denoised based on first-order low-pass filtering (inertial filtering).

[0068] The transfer function of the first-order low-pass filter is as shown in Formula 1:

[0069] G(s) = ω c / (s + ω c ) Formula 1

[0070] where, wc represents the filtering cut-off angular frequency, and, T = 1 / w c , where T is the filtering time constant and s is the Laplace operator.

[0071] Discretizing the first-order low-pass filter gives Equation 2:

[0072] y(n) = (ω c T s )(1 + ω c T s )x(n) + 1 / (1 + ω c T s )y(n - 1) Equation 2

[0073] a = (ω c T s ) / (1 + ω c T s ), and 1 / (1 + ω c T s ) = 1 - a, thus Equation 3 can be obtained:

[0074] y(n) = ax(n) + (1 - a)y(n - 1) Equation 3

[0075] Among them, y(n) is the filtered value obtained from the current liquid flow rate or current liquid pressure in this processing, y(n - 1) is the filtered value obtained from the current liquid flow rate or current liquid pressure in the previous processing, and x(n) is the current liquid flow rate or current liquid pressure. According to the first-order low-pass filter's good suppression effect on periodic interference, but the characteristic that a larger filtering coefficient will cause data lag, a dynamic balance can be obtained after introducing a dynamic adjustment coefficient. The current liquid flow rate or current liquid pressure collected under the condition of meeting sensitivity and stability can provide timely and stable data for the control of the first regulating valve and the second regulating valve, playing a good synergistic role and reducing the risk of regulation oscillation.

[0076] In the embodiment of the present invention, the current liquid property of the circulating liquid in the test chamber is determined.

[0077] Step 220: Determine the initial opening degree of the first regulating valve according to the property range to which the current liquid property belongs, and adjust the opening degree of the first regulating valve to the initial opening degree.

[0078] As described above, the first regulating valve mainly adjusts the opening degree according to the interval to which the target liquid property belongs to assist the second regulating valve to achieve the control of the liquid property.

[0079] Specifically, first, the attribute range to which the current liquid attribute belongs can be determined according to the current liquid attribute and the attribute ranges corresponding to each liquid attribute. Second, the initial opening degree of the first regulating valve can be determined according to the attribute range to which the current liquid attribute belongs and the corresponding relationship between the attribute range built in the system and the opening degree of the first regulating valve, and the opening degree of the first regulating valve can be adjusted to the initial opening degree.

[0080] For example, when the liquid attribute is liquid flow rate, the flow rate range to which the current liquid flow rate belongs can be determined, and the initial opening degree of the first regulating valve can be determined according to the flow rate range to which the current liquid flow rate belongs and the corresponding relationship between the flow rate range built in the system and the opening degree of the first regulating valve; when the liquid attribute is liquid pressure, the pressure range to which the current liquid pressure belongs can be determined, and the initial opening degree of the first regulating valve can be determined according to the pressure range to which the current liquid pressure belongs and the corresponding relationship between the pressure range built in the system and the opening degree of the first regulating valve. Furthermore, the opening degree of the first regulating valve can be adjusted to the initial opening degree to achieve the initial adjustment of the first regulating valve.

[0081] In addition, during the adjustment of the opening degree of the first regulating valve, the impact on the liquid attribute can be reduced by introducing an opening degree rhythm planning method to limit the steep change of its opening degree. The implementation method is mainly: through a linear straight-line function, a 10 ms clock signal is introduced, and the opening degree adjustment of the first regulating valve is gradually completed according to the predetermined position relationship.

[0082] In practical applications, in the flow rate or pressure mode, the automatically adjustable interval grading span (such as *L or *Bar) can be determined, and a matching model is established with the opening degree of the first regulating valve. This matching model can be used to determine the opening degree of the first regulating valve according to the current liquid flow rate or the current liquid pressure.

[0083] In the embodiment of the present invention, after determining the initial opening degree of the first regulating valve according to the attribute range to which the current liquid attribute belongs, the opening degree of the first regulating valve is adjusted to the initial opening degree by adjusting the opening degree of the first regulating valve.

[0084] Step 230: Determine the updated liquid attribute of the circulating liquid in the test chamber.

[0085] After the first regulating valve is adjusted to the initial opening degree, the liquid attribute of the circulating liquid in the test chamber changes. Since the adjustment of the opening degree of the second regulating valve needs to refer to the current liquid attribute and the target liquid attribute, in order to adjust the second regulating valve more precisely, after the first regulating valve is adjusted to the initial opening degree, it is necessary to re-determine the liquid attribute of the circulating liquid in the test chamber. That is, the updated liquid attribute of the circulating liquid in the test chamber can be determined.

[0086] In the embodiment of the present invention, the updated liquid attribute of the circulating liquid in the test chamber is determined.

[0087] Step 240: Adjust the opening degree of the second regulating valve according to the updated liquid property and the target liquid property until the liquid property of the circulating liquid reaches the target liquid property.

[0088] Specifically, the opening degree of the second regulating valve can be adjusted based on the incremental PID algorithm to make the liquid flow rate in the test chamber reach the target liquid flow rate or the liquid pressure reach the target liquid pressure. Specifically, in the incremental PID algorithm, the actuator is the second regulating valve, the object can be the liquid flow rate or the liquid pressure, and the target value of the object is the target liquid flow rate or the target liquid pressure. Discretization processing based on the PID control formula corresponding to the incremental PID algorithm can obtain Formula 4:

[0089] ΔU(k) = K p (err(k) - err(k - 1)) + K i err(k) + K d (err(k) - 2err(k - 1) + err(k - 2)) Formula 4

[0090] Wherein, K p represents the proportional band, K i represents the integral time, K d represents the differential time, Δu(k) represents the object, err(k) represents the target liquid flow rate or the target liquid pressure, err(k - 1) represents the updated liquid flow rate or the updated liquid pressure after adjusting the opening degree of the second regulating valve, and err(k - 2) represents the current liquid flow rate or the current liquid pressure before adjusting the opening degree of the second regulating valve.

[0091] In practical applications, the opening degree of the second regulating valve can be manually adjusted first to make the liquid flow rate in the test chamber reach the target liquid flow rate or the liquid flow rate reach the target liquid flow rate. Then, according to the characteristics of the incremental PID output without accumulation and the control increment only related to the recent deviation, the manual adjustment can be directly switched to automatic adjustment, that is, the opening degree of the second regulating valve can be automatically adjusted based on the incremental PID algorithm to make the liquid flow rate in the test chamber reach the target liquid flow rate or the liquid flow rate reach the target liquid flow rate, realizing the seamless switching between the manual adjustment and the automatic adjustment of the second regulating valve and ensuring that there is no large steep change in the liquid flow rate or the liquid during the entire control cycle.

[0092] It should be noted that during the process of automatically adjusting the opening degree of the second regulating valve based on the incremental PID algorithm, on the one hand, the opening degree adjustment of the second regulating valve can be optimized through variable integration. The discretization formula of variable integration is as Formula 5:

[0093]

[0094] Variable integral can change the magnitude of the integral action through the pre-planned deviation amount. The second regulating valve mainly plans two functional relationships between deviation and integral coefficient by updating the difference between the liquid flow rate and the target liquid flow rate or updating the difference between the liquid pressure and the target liquid pressure, so as to achieve the effect of variable integral. When the difference between the updated liquid flow rate and the target liquid flow rate or the difference between the updated liquid pressure and the target liquid pressure is larger, the integral action is smaller; when the difference between the updated liquid flow rate and the target liquid flow rate or the difference between the updated liquid pressure and the target liquid pressure is smaller, the integral action is larger, making it achieve the stability of liquid flow rate and liquid pressure control.

[0095] On the other hand, the opening adjustment of the second regulating valve can be optimized through incomplete differentiation. The discretization of incomplete differentiation is as shown in Equation 6:

[0096] ΔU d (k)=K d (1-α)(err(k)-2err(k - 1)+err(k - 2))+αΔU d (k - 1) Equation 6

[0097] Incomplete differentiation is introduced through a first-order low-pass filter to improve the dynamic characteristics of the second regulating valve at the end of liquid flow rate or liquid pressure control, so that it smoothly cuts into the target value. Specifically, incomplete differentiation performs a first-order filtering process on the incremental differential term calculated. For example, the current differential increment and the previous differential result can be weighted and averaged to obtain a stable and incomplete differential result.

[0098] On another aspect, the opening adjustment of the second regulating valve can be optimized through output limiting.

[0099] During the adjustment process of the second regulating valve, the following situations may occur: unreasonable setting of the regulating valve control parameters, sudden change of the input current liquid flow rate or current liquid pressure, large output of the opening of the second regulating valve, etc., which may cause oscillation of the current liquid flow rate or current liquid pressure, resulting in overshoot or oscillation phenomena. Therefore, the oscillation phenomenon of the second regulating valve can be prevented by limiting the difference between the current liquid flow rate and the target liquid flow rate or the difference between the current liquid pressure and the target liquid pressure, as well as limiting the upper and lower limits of the final opening of the second regulating valve.

[0100] In one implementation, during the process of adjusting the opening of the second regulating valve, if the liquid property of the circulating liquid cannot reach the target liquid property, the termination liquid property of the circulating liquid in the test chamber is determined, and the termination liquid property is used as the current liquid property, and the process returns to execute the determination of the current liquid property of the circulating liquid in the test chamber until the liquid property of the circulating liquid reaches the target liquid property.

[0101] If adjusting the opening degree of the second regulating valve fails to make the liquid flow rate in the test chamber reach the target liquid flow rate or the liquid pressure reach the target liquid pressure, the liquid flow rate can be re-determined as the updated liquid flow rate or the liquid pressure can be re-determined as the updated liquid pressure, and the initial opening degree of the first regulating valve can be updated according to the flow rate range to which the updated liquid flow rate belongs and the corresponding relationship between the flow rate range built in the system and the opening degree of the first regulating valve, or, the initial opening degree of the first regulating valve can be updated according to the pressure range to which the updated liquid pressure belongs and the corresponding relationship between the pressure range built in the system and the opening degree of the first regulating valve, and the opening degree of the first regulating valve can be adjusted to the initial opening degree. Then, the second regulating valve can be continuously adjusted until the liquid flow rate in the test chamber reaches the target liquid flow rate or the liquid pressure in the test chamber reaches the target liquid pressure.

[0102] In the embodiments of the present invention, the opening degree of the second regulating valve is adjusted according to the updated liquid flow rate and the target liquid flow rate or the updated liquid pressure and the target liquid pressure, so as to achieve that the liquid flow rate of the circulating liquid in the test chamber reaches the target liquid flow rate or to achieve that the liquid pressure of the circulating liquid in the test chamber reaches the target liquid pressure, and to provide the required test environment for the device under test in the test chamber.

[0103] The test method provided by the embodiments of the present invention is applied to a test system composed of a refrigeration circuit and a circulation circuit. The refrigeration circuit is communicated with the circulation circuit through an evaporator. The circulation circuit includes a test chamber for placing the device under test, a first regulating valve and a second regulating valve. The method includes: determining the current liquid property of the circulating liquid in the test chamber; determining the initial opening degree of the first regulating valve according to the property range to which the current liquid property belongs, and adjusting the opening degree of the first regulating valve to the initial opening degree; determining the updated liquid property of the circulating liquid in the test chamber; adjusting the opening degree of the second regulating valve according to the updated liquid property and the target liquid property until the liquid property of the circulating liquid reaches the target liquid property. In the above technical solution, the current liquid property of the circulating liquid in the test chamber is determined. After determining the initial opening degree of the first regulating valve according to the property range to which the current liquid property belongs, the opening degree of the first regulating valve is adjusted to the initial opening degree by adjusting the opening degree of the first regulating valve. Then, the updated liquid property of the circulating liquid in the test chamber is continuously determined, and the opening degree of the second regulating valve is adjusted according to the updated liquid flow rate and the target liquid flow rate or the updated liquid pressure and the target liquid pressure, so as to achieve that the liquid flow rate of the circulating liquid in the test chamber reaches the target liquid flow rate or to achieve that the liquid pressure of the circulating liquid in the test chamber reaches the target liquid pressure, and to provide the required test environment for the device under test in the test chamber.

[0104] In addition, when the liquid properties of the circulating liquid cannot reach the target liquid properties during the process of adjusting the opening degree of the second regulating valve, by re-determining the termination liquid properties of the circulating liquid in the test chamber and taking the termination liquid properties as the current liquid properties, return to execute the determination of the current liquid properties of the circulating liquid in the test chamber until the liquid properties of the circulating liquid reach the target liquid properties, further realizing the liquid flow rate of the circulating liquid in the test chamber to the target liquid flow rate or realizing the liquid pressure of the circulating liquid in the test chamber to the target liquid pressure, so as to provide the required test environment for the device under test in the test chamber.

[0105] Figure 3 FIG. 4 is a schematic structural diagram of a test device provided by an embodiment of the present invention. The device can be applicable to the situation where a required test environment needs to be provided for a device under test. The device is loaded in a test system composed of a refrigeration circuit and a circulation circuit. The refrigeration circuit is communicated with the circulation circuit through an evaporator. The circulation circuit includes a test chamber for placing the device under test, a first regulating valve, and a second regulating valve, which can be implemented by software and / or hardware and is generally integrated in the test system.

[0106] As Figure 3 shown, the device includes:

[0107] A first determination module 310, configured to determine the current liquid properties of the circulating liquid in the test chamber;

[0108] A first adjustment module 320, configured to determine the initial opening degree of the first regulating valve according to the property range to which the current liquid properties belong, and adjust the opening degree of the first regulating valve to the initial opening degree;

[0109] A second determination module 330, configured to determine the updated liquid properties of the circulating liquid in the test chamber;

[0110] A second adjustment module 340, configured to adjust the opening degree of the second regulating valve according to the updated liquid properties and the target liquid properties until the liquid properties of the circulating liquid reach the target liquid properties.

[0111] The test device provided in this embodiment is loaded into a test system composed of a refrigeration circuit and a circulation circuit. The refrigeration circuit is connected to the circulation circuit through an evaporator. The circulation circuit includes a test chamber for placing a device under test, a first regulating valve, and a second regulating valve. By determining the current liquid property of the circulating liquid in the test chamber; determining the initial opening of the first regulating valve according to the property range to which the current liquid property belongs, and adjusting the opening of the first regulating valve to the initial opening; determining the updated liquid property of the circulating liquid in the test chamber; and adjusting the opening of the second regulating valve according to the updated liquid property and the target liquid property until the liquid property of the circulating liquid reaches the target liquid property. In the above technical solution, the refrigeration circuit cools the circulating liquid in the circulation circuit through the evaporator. By adjusting the openings of the first regulating valve and the second regulating valve, the liquid flow rate or liquid pressure of the circulating liquid in the test chamber is adjusted, so as to provide the device under test in the test chamber with the required test environment.

[0112] Based on the above embodiment, the device further includes:

[0113] An execution module, configured to, during the process of adjusting the opening of the second regulating valve, if the liquid property of the circulating liquid cannot reach the target liquid property, determine the termination liquid property of the circulating liquid in the test chamber, and use the termination liquid property as the current liquid property, and return to execute determining the current liquid property of the circulating liquid in the test chamber until the liquid property of the circulating liquid reaches the target liquid property.

[0114] The test device provided by an embodiment of the present invention can execute the test method provided by any embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the test method.

[0115] It should be noted that in the embodiment of the above test device, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, the specific names of the functional units are only for the convenience of mutual distinction and do not limit the protection scope of the present invention.

[0116] Figure 4 It is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. Figure 4 It shows a block diagram of an exemplary electronic device 4 suitable for implementing the embodiments of the present invention. Figure 4 The shown electronic device 4 is only an example and should not bring any limitation to the functions and usage scope of the embodiments of the present invention.

[0117] Such as Figure 4As shown, the electronic device 4 is embodied in the form of a general-purpose computing electronic device. The components of the electronic device 4 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that couples different system components (including the system memory 28 and the processing unit 16).

[0118] The bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of a variety of bus structures. By way of example, these architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MAC) bus, Enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.

[0119] The electronic device 4 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the electronic device 4, including volatile and nonvolatile media, removable and non-removable media.

[0120] The system memory 28 can include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The electronic device 4 may further include other removable / non-removable, volatile / nonvolatile computer system storage media. By way of example only, a storage system 34 can be used for reading and writing on non-removable, nonvolatile magnetic media ( Figure 4 not shown, typically referred to as a "hard disk drive"). Although Figure 4 not shown in the figure, a disk drive for reading and writing on a removable nonvolatile disk (such as a "floppy disk") and an optical disk drive for reading and writing on a removable nonvolatile optical disk (such as a CD-ROM, DVD-ROM, or other optical media) can be provided. In these cases, each drive can be coupled to the bus 18 through one or more data media interfaces. The system memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various embodiments of the present invention.

[0121] A program / utility 40 having a set (at least one) of program modules 42 can be stored, for example, in the system memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, and the implementation of a network environment may be included in each or some combination of these examples. The program modules 42 generally perform the functions and / or methods described in the embodiments of the present invention.

[0122] The electronic device 4 can also communicate with one or more external devices 14 (such as a keyboard, a pointing device, a display 24, etc.), and can also communicate with one or more devices that enable a user to interact with the electronic device 4, and / or communicate with any device that enables the electronic device 4 to communicate with one or more other computing devices (such as a network card, a modem, etc.). Such communication can be carried out through an input / output (I / O) interface 22. Moreover, the electronic device 4 can also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through a network adapter 20. As Figure 4 shown, the network adapter 20 communicates with other modules of the electronic device 4 through a bus 18. It should be understood that although Figure 4 not shown in the figure, other hardware and / or software modules can be used in combination with the electronic device 4, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0123] The processing unit 16 executes various functional applications and page displays by running programs stored in the system memory 28. For example, it implements the test method provided by the embodiments of the present invention. The method includes:

[0124] Determine the current liquid property of the circulating liquid in the test chamber;

[0125] Determine the initial opening degree of the first regulating valve according to the property range to which the current liquid property belongs, and adjust the opening degree of the first regulating valve to the initial opening degree;

[0126] Determine the updated liquid property of the circulating liquid in the test chamber;

[0127] Adjust the opening degree of the second regulating valve according to the updated liquid property and the target liquid property until the liquid property of the circulating liquid reaches the target liquid property.

[0128] Of course, those skilled in the art can understand that the processor can also implement the technical solutions of the test method provided by any embodiment of the present invention.

[0129] The embodiments of the present invention provide a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements, for example, the test method provided by the embodiments of the present invention. The method includes:

[0130] Determine the current liquid property of the circulating liquid in the test chamber;

[0131] Determine the initial opening degree of the first regulating valve according to the property range to which the current liquid property belongs, and adjust the opening degree of the first regulating valve to the initial opening degree;

[0132] Determine the updated liquid properties of the circulating liquid in the test chamber;

[0133] Adjust the opening degree of the second regulating valve according to the updated liquid properties and the target liquid properties until the liquid properties of the circulating liquid reach the target liquid properties.

[0134] The computer storage medium of the embodiment of the present invention can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (non-exhaustive list) of the computer-readable storage medium include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, the computer-readable storage medium can be any tangible medium that contains or stores a program, and this program can be used by or in combination with an instruction execution system, apparatus, or device.

[0135] The computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, in which the computer-readable program code is carried. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer-readable signal medium can also be any computer-readable medium other than the computer-readable storage medium, and this computer-readable medium can send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device.

[0136] The program code contained on the computer-readable medium can be transmitted by any suitable medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0137] Computer program code for performing the operations of the present invention can be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, executed as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (for example, by using an Internet service provider to connect through the Internet).

[0138] Those of ordinary skill in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Optionally, they can be implemented with program code executable by a computer device, so that they can be stored in a storage device and executed by the computing device, or they can be separately fabricated into individual integrated circuit modules, or multiple modules or steps among them can be fabricated into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0139] In addition, in the technical solution of the present invention, the acquisition, storage, use, processing, etc. of data all comply with the relevant provisions of national laws and regulations.

[0140] Note that the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A testing system, characterized in that: The invention comprises a refrigeration circuit and a circulation circuit, wherein the refrigeration circuit is connected to the circulation circuit through an evaporator, the circulation circuit comprises a test chamber for placing a device to be tested, and a test environment is provided for the device to be tested through a circulating liquid flowing through the circulation circuit, the circulation circuit further comprises a first regulating valve and a second regulating valve, the first regulating valve and the second regulating valve are used to adjust the test environment, the first regulating valve is connected in parallel to the test chamber, one end of the test chamber is connected to the electric heating pipe in the circulation circuit through the second regulating valve, and the other end is connected to the evaporator; when the test chamber needs a circulating liquid with a target liquid property, the initial opening of the first regulating valve is determined according to the property range to which the current liquid property of the circulating liquid belongs, and the first regulating valve is adjusted to the initial opening, and the second regulating valve is adjusted according to the updated liquid property of the circulating liquid after the first regulating valve is adjusted to the initial opening and the target liquid property, until the circulating liquid reaches the target liquid property, wherein the liquid property comprises flow rate or pressure.

2. The test system according to claim 1, characterized in that: The refrigeration circuit includes a compressor, an oil separator, an air-cooled condenser, a drying filter, an electronic expansion valve and a regenerator which are connected in sequence, and the regenerator is connected to the compressor and the evaporator respectively.

3. The test system according to claim 1, characterized in that: The circulation loop also includes an expansion tank, a one-way valve, a gas-liquid separator, a circulation pump, and an electric heating pipe. The lower end of the expansion tank is connected to one side of the gas-liquid separator through the one-way valve, the upper end of the gas-liquid separator is connected to the upper end of the expansion tank, the lower end of the gas-liquid separator is connected to one end of the electric heating pipe through the circulation pump, the other end of the electric heating pipe is connected to the evaporator through the test cavity, and the evaporator is simultaneously connected to the other side of the gas-liquid separator.

4. The test system according to claim 1, characterized in that: The circulation loop further includes a flow sensor and a pressure sensor, wherein the flow sensor is used to determine the liquid flow rate of the circulating liquid flowing through the test cavity, and the pressure sensor is used to determine the liquid pressure of the circulating liquid flowing into the test cavity.

5. A testing method, characterized in that: Applied to a test system consisting of a refrigeration circuit and a circulation circuit, the refrigeration circuit is connected to the circulation circuit through an evaporator, the circulation circuit comprises a test chamber for placing a device to be tested and a first regulating valve and a second regulating valve, the first regulating valve is connected in parallel to the test chamber, one end of the test chamber is connected to an electric heating pipe in the circulation circuit through the second regulating valve, and the other end is connected to the evaporator, the method comprises: Determining a current liquid property of the circulating liquid in the test chamber, wherein the liquid property includes flow rate or pressure; Determining an initial opening of the first regulating valve according to the property range to which the current liquid property belongs, and adjusting the opening of the first regulating valve to the initial opening; determining a refresh fluid property of the circulating fluid in the test chamber; The opening degree of the second regulating valve is adjusted according to the updated liquid property and the target liquid property until the liquid property of the circulating fluid reaches the target liquid property.

6. The testing method according to claim 5, characterized in that: Also includes: During the process of adjusting the opening of the second regulating valve, if the liquid property of the circulating fluid cannot reach the target liquid property, the terminal liquid property of the circulating fluid in the test chamber is determined, and the terminal liquid property is used as the current liquid property, and the process of determining the current liquid property of the circulating fluid in the test chamber is returned until the liquid property of the circulating fluid reaches the target liquid property.

7. A testing device, characterized in that: The device is loaded on a test system consisting of a refrigeration circuit and a circulation circuit, wherein the refrigeration circuit is connected to the circulation circuit through an evaporator, the circulation circuit comprises a test chamber for placing the device to be tested and a first regulating valve and a second regulating valve, the first regulating valve is connected in parallel to the test chamber, one end of the test chamber is connected to the electric heating pipe in the circulation circuit through the second regulating valve, and the other end is connected to the evaporator, the device comprises: A first determination module, configured to determine a current liquid property of the circulating liquid in the test chamber, wherein the liquid property includes flow rate or pressure; a first adjustment module, configured to determine an initial opening of the first regulating valve according to a property range to which the current liquid property belongs, and adjust the opening of the first regulating valve to the initial opening; a second determination module, configured to determine an updated liquid property of the circulating liquid in the test chamber; The second adjustment module is used to adjust the opening of the second regulating valve according to the updated liquid property and the target liquid property until the liquid property of the circulating fluid reaches the target liquid property.

8. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively coupled to the at least one processor; The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the testing method as described in any one of claims 5-6.

9. A storage medium containing computer executable instructions, characterized in that: The computer executable instructions are used to perform the testing method according to any one of claims 5 to 6 when executed by a computer processor.

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