Electronic pump testing method and system

Abstract

This invention provides a method and system for testing electronic pumps. The system includes a test bench for connecting to the electronic pump under test. The method includes: determining the average response time and tolerance band of a qualified electronic pump, and determining a preset transmission time threshold and a test threshold range based on the average response time and tolerance band; the test bench calculates the time difference between the transmission time of the command signal and the feedback time of the corresponding status feedback signal received before the command signal is transmitted, and determines whether the time difference is equal to the preset transmission time threshold; if not, the preset time is adjusted; if yes, the response time measurement value of the electronic pump under test is obtained, and it is determined whether it is within the test threshold range; if not, the response time of the electronic pump under test is determined to be unqualified. This invention improves the accuracy of testing the response time of electronic pumps without changing the software interaction signal cycle, thereby achieving more effective quality control.

Description

Technical Field

[0001] This invention belongs to the field of vehicle equipment testing technology, and specifically relates to an electronic pump testing method and an electronic pump testing system for performing the method. Background Technology

[0002] After the electronic pump product comes off the production line, it needs to undergo quality testing, which includes testing whether the response time of the electronic pump is up to standard. The response time is the time it takes for the electronic pump to execute the command signal value to reach the target flow rate after receiving the command signal. The response time must be within a certain range; otherwise, the electronic pump is unqualified.

[0003] Generally, electronic pumps have a fixed signal interaction period. However, when the pump's response time tolerance is smaller than the signal interaction period, the longer interaction period introduces additional variables into the response time test. This means the measured response time is not only related to the pump's inherent response time but also to the timing of the command signal transmission. Therefore, choosing the right time to send the command signal during testing is crucial. Incorrect timing can lead to inaccurate response time measurements. Consequently, if the test result shows a product response time exceeding tolerance, it's impossible to determine whether the deviation is due to the product itself or the timing of the command transmission, thus affecting the accuracy of response time quality testing and hindering effective quality control. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that the timing of command signal transmission affects the accuracy of response time measurements during existing electronic pump quality testing.

[0005] To address the above problems, this invention provides an electronic pump testing method. The electronic pump testing method is executed by an electronic pump testing system, which includes a test bench for connecting to the electronic pump under test. The electronic pump testing method includes:

[0006] S1: The test bench determines the average response time and tolerance band of the qualified electronic pump, and determines the preset transmission time threshold and test threshold range based on the average response time and tolerance band;

[0007] S2: After the electronic pump under test is turned on, it periodically sends a status feedback signal to the test bench according to the signal interaction cycle; after the electronic pump under test is turned on, the test bench periodically sends a command signal to the electronic pump under test at preset intervals according to the signal interaction cycle; the test bench records the feedback time of the received status feedback signal and the sending time of the sent command signal respectively.

[0008] The test bench calculates the time difference between the transmission time of the command signal and the feedback time of the corresponding status feedback signal received before the command signal is transmitted, and determines whether the time difference is equal to the preset transmission time threshold; if not, the preset time is adjusted and step S2 is continued; if yes, step S3 is continued.

[0009] S3: The test bench obtains the response time measurement value of the electronic pump under test and determines whether the response time measurement value is within the test threshold range; if not, the response time of the electronic pump under test is determined to be unqualified.

[0010] The above scheme determines the preset transmission time threshold and test threshold range based on the average response time and tolerance band of a qualified electronic pump. The timing of command signal transmission is then determined based on the preset transmission time threshold. After adjusting to a suitable command signal transmission timing, the test threshold range is used to determine whether the response time measurement is qualified. The testing method provided by this invention reduces the impact of command transmission timing on the accuracy of response time measurement without changing the software interaction signal cycle, thereby improving the accuracy of electronic pump response time testing and achieving more effective quality control.

[0011] According to another specific embodiment of the present invention, the electronic pump testing method disclosed in the embodiments of the present invention includes a preset sending time threshold including a first time threshold and a second time threshold; the test threshold range includes a first test threshold range or a second test threshold range.

[0012] Steps S2 and S3 include:

[0013] S21: The test bench calculates the time difference between the transmission time of the command signal and the feedback time of the corresponding status feedback signal received before the command signal is transmitted, and determines whether the time difference is equal to the first time threshold; if not, the preset time is adjusted and step S21 is continued; if yes, step S31 is continued.

[0014] S22: The test bench calculates the time difference between the transmission time of the command signal and the feedback time of the corresponding status feedback signal received before the command signal is transmitted, and determines whether the time difference is equal to the second time threshold; if not, the preset time is adjusted and step S22 is continued; if yes, step S32 is continued.

[0015] S31: The test bench obtains the response time measurement value of the electronic pump under test and determines whether the response time measurement value is within the first test threshold range; if yes, the preset time is adjusted and step S22 is continued; if no, the response time of the electronic pump under test is determined to be unqualified.

[0016] S32: The test bench obtains the response time measurement value of the electronic pump under test and determines whether the response time measurement value is within the range of the second test threshold; if yes, the response time of the electronic pump under test is deemed to be qualified; if no, the response time of the electronic pump under test is deemed to be unqualified.

[0017] By adopting the above scheme, two different transmission time thresholds, namely the first time threshold and the second time threshold, are determined based on the average response time and tolerance band of qualified electronic pumps. The upper and lower limits of the test threshold range are determined according to the different transmission time thresholds. The response time measurement value is judged as qualified according to different transmission times and the corresponding test threshold ranges. This further improves the accuracy of testing the response time of electronic pumps and enables more effective quality control.

[0018] According to another specific embodiment of the present invention, the electronic pump testing method disclosed in this embodiment defines the signal interaction period as one time unit. In step S1, determining the preset transmission time threshold based on the average response time and tolerance band includes calculating the first time threshold according to the following calculation formula:

[0019] T1=ceil(T0-△T / 2)-(T0-△T / 2).

[0020] Furthermore, the test threshold range is determined based on the mean response time and tolerance band, including the first test threshold range being greater than or equal to T0-△T / 2+1.

[0021] Where T1 is the first time threshold, T0 is the average response time, ΔT is the tolerance band, and ceil(T0-ΔT / 2) represents the integer rounding up of the value (T0-ΔT / 2).

[0022] Using the above method, unqualified products with excessively short screening response times can be identified.

[0023] According to another specific embodiment of the present invention, the electronic pump testing method disclosed in this embodiment defines the signal interaction period as one time unit. In step S1, determining the preset transmission time range based on the average response time and tolerance band includes calculating a second time threshold according to the following calculation formula:

[0024] T0=T0-△T / 2-floor(T0-△T / 2).

[0025] Furthermore, the test threshold range is determined based on the mean response time and tolerance band, including the second test threshold range being: less than or equal to T0 + ΔT / 2;

[0026] Where T0 is the second time threshold, T0 is the average response time, △T is the tolerance band, and floor(T0-△T / 2) represents the integer rounding down from the value (T0-△T / 2).

[0027] Using the above method, unqualified products with excessively long screening response times can be identified.

[0028] According to another specific embodiment of the present invention, in the electronic pump testing method disclosed in this embodiment, step S1, in which the test bench determines the average response time and tolerance band of a qualified electronic pump, includes: after the qualified electronic pump is turned on, the qualified electronic pump periodically sends a status feedback signal to the test bench according to a specific interaction cycle; the test bench periodically sends a command signal to the qualified electronic pump according to the specific interaction cycle and obtains the response time measurement value of the qualified electronic pump; the test bench determines the average response time and tolerance band based on the response time measurement value; wherein the specific interaction cycle is 0.1 to 0.3 times the signal interaction cycle.

[0029] By adopting the above scheme, a specific interaction period, which is much smaller than the fixed signal interaction period of a qualified electronic pump, is used to send command signals and status feedback signals. This improves the sampling rate and makes the interaction period as small as possible, reducing the impact of the transmission timing on the response time measurement. This allows for the acquisition of relatively accurate average response time and tolerance band.

[0030] The present invention also provides a sub-pump testing system for performing the electronic pump testing method of the present invention; the electronic pump testing system includes a test bench; the test bench is used to connect to the electronic pump under test.

[0031] The test bench determines the average response time and tolerance band of qualified electronic pumps, and determines the preset transmission time threshold and test threshold range based on the average response time and tolerance band.

[0032] After the electronic pump under test is turned on, it periodically sends status feedback signals to the test bench according to the signal interaction cycle; the test bench also periodically sends command signals to the electronic pump under test at preset intervals according to the signal interaction cycle after the electronic pump under test is turned on; the test bench records the feedback time of the received status feedback signal and the sending time of the sent command signal respectively.

[0033] The test bench also calculates the time difference between the transmission time of the command signal and the feedback time of the corresponding status feedback signal received before the command signal is transmitted, and determines whether the time difference is equal to the preset transmission time threshold. If not, the test bench adjusts the preset time. If so, the test bench also obtains the response time measurement value of the electronic pump under test and determines whether the response time measurement value is within the test threshold range.

[0034] According to another specific embodiment of the present invention, the electronic pump testing system disclosed in this embodiment includes a test bench comprising a signal transmission module and a detection module interconnected with each other. The signal transmission module and the detection module are respectively connected to the electronic pump under test. The signal transmission module is used to periodically send command signals to the electronic pump under test at preset intervals after the electronic pump under test is turned on, and records the transmission time. The signal transmission module also receives a status feedback signal and records the reception time, calculates the difference between the transmission time and the time of receiving the corresponding status feedback signal, and determines whether the difference is equal to a preset transmission time threshold. The detection module is used to obtain a measured value of the response time of the electronic pump under test and determines whether the measured value of the response time is within the test threshold range.

[0035] According to another specific embodiment of the present invention, the electronic pump testing system disclosed in the embodiment of the present invention further includes a test bench connected to a qualified electronic pump to determine the mean response time and tolerance band of the qualified electronic pump.

[0036] The beneficial effects of this invention are:

[0037] The electronic pump testing method and system provided by this invention determine a preset transmission time threshold and a test threshold range based on the average response time and tolerance band of a qualified electronic pump. The preset transmission time threshold determines the timing of command signal transmission, and after adjusting to a suitable command signal transmission timing, the system judges whether the response time measurement value is qualified based on the test threshold range. The testing method provided by this invention reduces the impact of the command transmission timing on the accuracy of the response time measurement value without changing the software interaction signal cycle, thereby improving the testing accuracy of electronic pump response time and achieving more effective quality control. Attached Figure Description

[0038] Figure 1 A schematic diagram of the electronic pump testing method provided by the present invention;

[0039] Figure 2 This is a structural block diagram showing the connection between the electronic pump testing system provided by the present invention and the electronic pump under test;

[0040] Figure 3 A flowchart of the electronic pump testing method provided by the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1: Test bench; 11: Signal transmission module; 12: Detection module;

[0043] 2: Electronic pump under test. Detailed Implementation

[0044] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0045] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] To make the objectives, technical solutions, and advantages of the present invention clearer, the specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0047] First, it's important to clarify that during the electronic pump offline response time test, assuming the average response time of a qualified electronic pump is T0 and the tolerance band is ΔT, if the electronic pump receives a command signal at a certain moment, a qualified electronic pump should reach the target flow rate value within T0 ± ΔT / 2 after that moment, completing the response. However, because the electronic pump has a fixed signal interaction cycle, it also needs to send a status feedback signal in the next signal interaction cycle. Therefore, the time for sending the status feedback signal and the time for completing the response form a time difference. This time difference, within one signal interaction cycle, is related to the timing of sending the command signal (the moment the electronic pump receives the command signal), thus introducing an additional variable. This means that the measured response time is not only related to the electronic pump's own response time but also to the timing of sending the command signal.

[0048] When ΔT is greater than the signal interaction period, the time difference between sending the status feedback signal and completing the response is less than ΔT, therefore, this time difference has little impact on the test results. However, when ΔT is less than the signal interaction period, the time difference between sending the status feedback signal and completing the response has a significant impact on the test results, potentially leading to inaccurate measurement of the response time. Figure 1 The schematic diagram of the electronic pump testing method of the present invention is provided, as follows: Figure 1As shown, the signal interaction period is defined as 1 unit. On the signal interaction time axis (i.e., the horizontal axis), if after the second unit, time t1 has elapsed, the test bench sends a flow command signal. A qualified electronic pump needs to reach the target flow value within time T0±△T / 2. In the next signal interaction period, a status feedback signal is sent. At this time, the test bench reads the response time measurement value, and the interval of the measurement value is... Figure 1 In the context [A, B], A = ceil(t1 + T0 - △T / 2) - t1, B = ceil(t1 + T0 + △T / 2) - t1, where t1 is a variable related to the timing of the command transmission, occurring within 0 to 1 time units. For ceil(t1 + T0 - △T / 2) - t1, the value is minimum at t1 = ceil(T0 - △T / 2) - (T0 - △T / 2), with a value of T0 - △T / 2. For ceil(t1 + T0 + △T / 2) - t1, the value is maximum at t1 = ceil(T0 + △T / 2) - (T0 + △T / 2), with a value of T0 + △T / 2 + 1. Because this test method is related to the timing of t1, it is impossible to determine whether the product's response time is unqualified or due to the timing of sampling t1 when the measured response time is in the range of (T0+△T / 2, T0+△T / 2+1).

[0049] Here, ceil(x) represents rounding up the value x to the nearest integer.

[0050] Example 1

[0051] To address the above problems, this invention provides an electronic pump testing method, executed by an electronic pump testing system, such as... Figure 2 As shown, the electronic pump test system includes a test bench 1, which is used to connect to the electronic pump under test 2 (DUT).

[0052] like Figure 3 As shown, the electronic pump test method includes:

[0053] S1: The test bench determines the average response time and tolerance band of the qualified electronic pump, and determines the preset transmission time threshold and test threshold range based on the average response time and tolerance band.

[0054] Specifically, the average response time and tolerance band of a qualified electronic pump can be theoretically calculated based on the design characteristics of the electronic pump itself, or based on previous test results of similar electronic pumps, or obtained using methods with higher sampling rates, or by testing using other methods.

[0055] In one specific implementation, a method with a higher sampling rate is used to obtain the mean response time and tolerance band of the qualified electronic pump by connecting a test bench to the qualified electronic pump. The steps include:

[0056] After a qualified electronic pump is turned on, its interaction cycle is modified via software. This causes the qualified electronic pump to periodically send status feedback signals to the test bench according to a specific interaction cycle. The test bench then periodically sends command signals to the qualified electronic pump according to the same specific interaction cycle, obtaining the response time measurement value of the qualified electronic pump. This measurement value can be obtained by testing multiple qualified electronic pump samples separately, or by testing a single qualified electronic pump sample multiple times. The test bench then calculates and determines the average response time and tolerance band based on the multiple response time measurements. The specific interaction cycle is 0.1 to 0.3 times the signal interaction cycle; in one specific embodiment, the specific interaction cycle is 0.1 times the signal interaction cycle. By using a specific interaction cycle much smaller than the fixed signal interaction cycle of the qualified electronic pump to send command and status feedback signals, the sampling rate is improved, and the interaction cycle is kept as small as possible below the tolerance band. This reduces the impact of the transmission timing on the response time measurement value, resulting in a relatively accurate average response time and tolerance band.

[0057] Furthermore, a preset transmission time threshold and a test threshold range are determined based on the average response time and tolerance band. The preset transmission time can be determined to be within a certain time range based on the average response time and tolerance band, and then a reasonable test threshold range is calculated based on the transmission time. In this embodiment, the preset transmission time is determined to be a fixed value based on the average response time and tolerance band, and then a reasonable test threshold range is calculated based on the transmission time. More specifically, the determined test threshold range can include a maximum value and a minimum value, or it can limit only the maximum value or only the minimum value to filter out unqualified products with excessively large or small response times.

[0058] S2: After the electronic pump under test is turned on, it periodically sends status feedback signals to the test bench according to a fixed signal interaction cycle; after the electronic pump under test is turned on, the test bench periodically sends command signals to the electronic pump under test at preset intervals according to the same signal interaction cycle; the test bench records the feedback time of the received status feedback signal and the sending time of the sent command signal respectively; the test bench calculates the time difference between the sending time of the sent command signal and the feedback time of the received corresponding status feedback signal before the sent command signal, and determines whether the time difference is equal to the preset sending time threshold; if not, the preset time is adjusted, and step S2 continues until the adjusted preset time makes the time difference equal to the preset sending time threshold; if yes, step S3 is entered.

[0059] S3: The test bench obtains the response time measurement value of the electronic pump under test and determines whether the response time measurement value is within the test threshold range; if not, the response time of the electronic pump under test is determined to be unqualified.

[0060] If the determined test threshold range includes both a maximum and a minimum value, the electronic pump under test is deemed to have a qualified response time if the measured response time falls within this range. If the determined test threshold range only limits the maximum value or only limits the minimum value, then the response time is determined to be neither too large nor too small. Further evaluation is then conducted to determine if the response time is too small or too large, thus confirming the electronic pump's qualification.

[0061] Specifically, in this embodiment, the signal interaction period is defined as one time unit. In one implementation, step S1, determining the preset transmission time threshold based on the average response time and tolerance band, includes calculating the preset transmission time threshold according to the following formula:

[0062] T1=ceil(T0-△T / 2)-(T0-△T / 2).

[0063] Furthermore, the test threshold range is determined based on the mean response time and tolerance band, and the test threshold range is greater than or equal to T0-△T / 2+1.

[0064] When the time difference between the sending time of the command signal and the feedback time of the corresponding status feedback signal received before sending the command signal is equal to the above-mentioned preset sending time threshold, if the measured response time of the electronic pump under test is less than T0-△T / 2+1, the response time of the electronic pump under test is determined to be unqualified; this range is used to identify and screen unqualified products with excessively small response times.

[0065] In another implementation, step S1, determining the preset transmission time range based on the average response time and tolerance band, includes calculating a preset transmission time threshold according to the following formula:

[0066] T1=T0-△T / 2-floor(T0-△T / 2).

[0067] Furthermore, the test threshold range is determined based on the mean response time and tolerance band, and the test threshold range is: less than or equal to T0 + ΔT / 2.

[0068] When the time difference between the sending time of the command signal and the feedback time of the corresponding feedback signal received before sending the command signal is equal to the above-mentioned preset sending time threshold, if the measured response time of the electronic pump under test is greater than T0+△T / 2, the response time of the electronic pump under test is determined to be unqualified; this range is used to identify and screen unqualified products with excessively large response times.

[0069] Where T1 is the preset transmission time threshold, T0 is the average response time, and ΔT is the tolerance band; ceil(T0-ΔT / 2) represents rounding up the value (T0-ΔT / 2), and floor(T0-ΔT / 2) represents rounding down the value (T0-ΔT / 2). The above formulas and values ​​are relative values ​​calculated based on a signal interaction period defined as one time unit. To obtain the actual time for the preset transmission time threshold and the test threshold range, it is necessary to convert them based on the actual value of the signal interaction period.

[0070] More specifically, the following examples use concrete numerical values. Figure 1 This embodiment will be described in detail.

[0071] Define the signal interaction period as 1 unit, assume the average response time T0 = 2.5, and the tolerance band ΔT = 0.6, then the actual response time should be 2.5 ± 0.3.

[0072] like Figure 1 As shown, assuming t1 = 0.2, after the second unit, with an interval of 0.2, i.e., at time 2.2, the command signal is sent (i.e., the time when the electronic pump receives the command signal). The acceptable time to reach the target flow rate is 4.7 ± 0.3. However, the electronic pump under test receives the status feedback signal at time 5. From the test bench test, sending the command signal at time 2.2 always results in receiving the status feedback signal at time 5, with the minimum measured response time being 5 - 2.2 = 2.8.

[0073] If the actual response time of the electronic pump under test is too short (e.g., the actual response time < 2.5-0.3 (minimum limit), for example, 2.0), then the test bench will detect that the electronic pump under test has reached the target flow state at ceil(2.2+2.0) = 5, and the response time will be 5-2.2 = 2.8. This is consistent with the minimum measured value of a qualified electronic pump, leading to an inaccurate judgment.

[0074] Therefore, to identify electronic pumps with excessively short response times, t1 needs to be controlled to equal T1; where T1 = ceil(T0 - ΔT / 2) - (T0 - ΔT / 2) = ceil(2.5 - 0.3) - (2.5 - 0.3) = 3 - 2.2 = 0.8. This ensures that the electronic pump under test receives the command signal at time 2.8, and the time for a qualified electronic pump to reach the target flow response is 2.8 + 2.5 ± 0.3 = 5.3 ± 0.3. From bench testing, sending the command signal at time 2.8 results in receiving the status feedback signal at time 6, except at the lower limit of the response time (2.5 - 0.3), with a minimum response time of 3.2 (i.e., T0 - ΔT / 2 + 1). If an electronic pump's response time is unqualified, for example, 2.1 < 2.2 (the minimum limit), then... The test bench will receive the status feedback signal from the electronic pump under test at ceil(2.8+2.1)=5. The measured response time value is 5-2.8=2.2<3.2. Therefore, the response time of the electronic pump under test is too small and it is judged as unqualified. It should be noted that this qualified range excludes products with the lower limit of response time.

[0075] Furthermore, assuming t1 = 0.2, if the actual response time of the electronic pump under test is too long and therefore unqualified, such as an actual response time > 2.5 + 0.3 (maximum limit), for example, 2.9, then the test bench will receive a status feedback signal from the electronic pump under test reaching the target flow state at ceil(2.8 + 2.9) = 6, and the measured response time value will be 6 - 2.8 = 3.2; this is consistent with the measured value of a qualified electronic pump, indicating an inaccurate judgment.

[0076] Therefore, to identify electronic pumps with excessively long response times, t1 needs to be controlled to make it equal to T1; where T1 = T0 - ΔT / 2 - floor(T0 - ΔT / 2) = (2.5 - 0.3) - floor(2.5 - 0.3) = 2.2 - 2 = 0.2. This ensures that the electronic pump under test receives the command signal at time 2.2, and the time to achieve the target flow response is 2.2 + 2.5 ± 0.3 = 4.7 ± 0.3. From the test bench, sending the command signal at time 2.2 results in receiving the status feedback signal at time 5 at the latest, with the maximum test response time being 5 - 2.2 = 2.8 (i.e., T0 + ΔT / 2). If the response time of a certain electronic pump is unqualified, for example, 2.9 > 2.8 (the maximum limit), the test bench will detect the status feedback signal of the electronic pump under test reaching the target flow state at ceil(2.2+2.9) = 6. The test bench calculates the response time as 6-2.8 = 3.8 > 2.8. Therefore, the response time of the electronic pump under test is too long and it is judged to be unqualified.

[0077] In one embodiment of the electronic pump testing system of the present invention, such as Figure 2As shown, the test bench 1 includes a signal transmission module 11 (Master) and a detection module 12 (Monitor) connected to each other. The signal transmission module 11 and the detection module 12 are respectively connected to the electronic pump under test 2. The signal transmission module 11 is used to periodically send command signals to the electronic pump under test 2 at preset intervals after the electronic pump under test 2 is turned on, and record the transmission time. The signal transmission module 11 also receives status feedback signals and records the reception time, calculates the difference between the transmission time and the time of receiving the corresponding feedback signal, and determines whether the difference is equal to the preset transmission time threshold. The detection module 12 is used to obtain the response time measurement value of the electronic pump under test 2 and determine whether the response time measurement value is within the test threshold range.

[0078] By adopting the above scheme, a preset transmission time threshold and a test threshold range are determined based on the average response time and tolerance band of a qualified electronic pump. The preset transmission time threshold determines the timing of command signal transmission. After adjusting to a suitable timing for command signal transmission, the test threshold range is used to determine whether the response time measurement value is unqualified. The test method provided by this invention reduces the impact of the timing of command transmission on the accuracy of response time measurement without changing the software interaction signal cycle, thereby improving the accuracy of testing the response time of electronic pumps and achieving more effective quality control.

[0079] Example 2

[0080] To address the above problems, this invention provides another electronic pump testing method, executed by an electronic pump testing system. The electronic pump testing method includes:

[0081] S1: The test bench determines the average response time and tolerance band of a qualified electronic pump, and determines a preset transmission time threshold and a test threshold range based on the average response time and tolerance band. The preset transmission time threshold includes a first time threshold and a second time threshold; the test threshold range includes either a first test threshold range or a second test threshold range. Specifically, the method for the test bench to determine the average response time and tolerance band of a qualified electronic pump is the same as in Example 1.

[0082] S21: After the electronic pump under test is turned on, it periodically sends a status feedback signal to the test bench according to the signal interaction cycle; after the electronic pump under test is turned on, the test bench periodically sends a command signal to the electronic pump under test at preset intervals according to the signal interaction cycle; the test bench records the feedback time of the received status feedback signal and the sending time of the sent command signal respectively; the test bench calculates the time difference between the sending time of the sent command signal and the feedback time of the corresponding feedback signal received before the sent command signal, and determines whether the time difference is equal to the first time threshold; if not, the preset time is adjusted, and step S21 is continued until the time difference is equal to the first time threshold; if yes, step S31 is entered.

[0083] S31: The test bench obtains the response time measurement value of the electronic pump under test and determines whether the response time measurement value is within the first test threshold range; if yes, the preset time is adjusted and step S22 is continued; if no, the response time of the electronic pump under test is determined to be unqualified.

[0084] S22: After the electronic pump under test is turned on, it periodically sends a status feedback signal to the test bench according to the signal interaction cycle; after the electronic pump under test is turned on, the test bench periodically sends a command signal to the electronic pump under test at preset intervals according to the signal interaction cycle; the test bench records the feedback time of the received status feedback signal and the sending time of the sent command signal respectively; the test bench calculates the time difference between the sending time of the sent command signal and the feedback time of the corresponding status feedback signal received before the sent command signal, and determines whether the time difference is equal to the second time threshold; if not, the preset time is adjusted, and step S22 is continued until the time difference is equal to the second time threshold; if yes, step S32 is entered.

[0085] S32: The test bench obtains the response time measurement value of the electronic pump under test and determines whether the response time measurement value is within the range of the second test threshold; if yes, the response time of the electronic pump under test is deemed to be qualified; if no, the response time of the electronic pump under test is deemed to be unqualified.

[0086] The signal interaction period is defined as one time unit. In one specific implementation, step S1, determining the preset transmission time threshold based on the average response time and tolerance band, includes calculating the first time threshold according to the following formula:

[0087] T1=ceil(T0-△T / 2)-(T0-△T / 2);

[0088] Furthermore, the test threshold range is determined based on the mean response time and tolerance band, including the first test threshold range being: greater than or equal to T0-△T / 2+1;

[0089] Where T1 is the first time threshold, T0 is the average response time, and ΔT is the tolerance band.

[0090] In another specific implementation, step S1, determining the preset transmission time range based on the average response time and tolerance band, includes calculating a second time threshold according to the following formula:

[0091] T0=T0-△T / 2-floor(T0-△T / 2);

[0092] Furthermore, the test threshold range is determined based on the mean response time and tolerance band, including the second test threshold range being: less than or equal to T0 + ΔT / 2;

[0093] Where T0 is the second time threshold, T0 is the mean response time, and ΔT is the tolerance band.

[0094] It should be noted that the first time threshold can be T0 as described above, and the second time threshold can be T1 as described above. Those skilled in the art can set these thresholds as needed.

[0095] The specific principles underlying this embodiment have been explained in detail in Embodiment 1 and will not be repeated here.

[0096] By adopting the above scheme, two different transmission time thresholds, namely the first time threshold and the second time threshold, are determined based on the average response time and tolerance band of qualified electronic pumps. The upper and lower limits of the test threshold range are determined according to the different transmission time thresholds. The response time measurement value is judged as qualified according to different transmission times and the corresponding test threshold ranges. This further improves the accuracy of testing the response time of electronic pumps and enables more effective quality control.

[0097] While the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the invention to these descriptions. Various changes in form and detail can be made by those skilled in the art, including several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims

1. A method for testing an electronic pump, characterized in that, The electronic pump testing method is executed by an electronic pump testing system, which includes a test bench for connecting to the electronic pump under test; the electronic pump testing method includes: S1: The test bench determines the average response time and tolerance band of the qualified electronic pump, and determines the preset transmission time threshold and test threshold range based on the average response time and the tolerance band; S2: After the electronic pump under test is turned on, it periodically sends a status feedback signal to the test bench according to the signal interaction cycle; after the electronic pump under test is turned on, the test bench periodically sends a command signal to the electronic pump under test at a preset time interval according to the signal interaction cycle; the test bench records the feedback time of receiving the status feedback signal and the sending time of sending the command signal respectively. The test bench calculates the time difference between the transmission time of sending the command signal and the feedback time of receiving the corresponding status feedback signal before sending the command signal, and determines whether the time difference is equal to the preset transmission time threshold. If not, adjust the preset time and continue to step S2; If so, proceed to step S3; S3: The test bench obtains the response time measurement value of the electronic pump under test, and determines whether the response time measurement value is within the test threshold range; If not, the response time of the electronic pump under test is deemed unqualified.

2. The electronic pump testing method as described in claim 1, characterized in that, The preset sending time threshold includes a first time threshold and a second time threshold; the test threshold range includes a first test threshold range and a second test threshold range; Steps S2 and S3 include: S21: The test bench calculates the time difference between the transmission time of sending the command signal and the feedback time of receiving the corresponding status feedback signal before sending the command signal, and determines whether the time difference is equal to the first time threshold. If not, adjust the preset time and continue with step S21; If so, proceed to step S31; S22: The test bench calculates the time difference between the transmission time of sending the command signal and the feedback time of receiving the corresponding status feedback signal before sending the command signal, and determines whether the time difference is equal to the second time threshold. If not, adjust the preset time and continue to step S22; If so, proceed to step S32; S31: The test bench obtains the response time measurement value of the electronic pump under test, and determines whether the response time measurement value is within the first test threshold range; If so, adjust the preset time and continue to step S22; If not, the response time of the electronic pump under test is deemed unqualified. S32: The test bench obtains the response time measurement value of the electronic pump under test, and determines whether the response time measurement value is within the range of the second test threshold. If so, the response time of the electronic pump under test is deemed to be qualified; If not, the response time of the electronic pump under test is deemed unqualified.

3. The electronic pump testing method as described in claim 2, characterized in that, The signal interaction period is defined as one time unit. In step S1, Determining the preset transmission time threshold based on the average response time and the tolerance band includes calculating the first time threshold according to the following formula: T1=ceil(T0-△T / 2)-(T0-△T / 2); Furthermore, determining the test threshold range based on the mean response time and the tolerance band includes, where the first test threshold range is: Greater than or equal to T0 - △T / 2 + 1; Where T1 is the first time threshold, T0 is the average response time, ΔT is the tolerance band, and ceil(T0-ΔT / 2) represents the integer rounding up of the value (T0-ΔT / 2).

4. The electronic pump testing method as described in claim 2, characterized in that, The signal interaction period is defined as one time unit. In step S1, Determining the preset transmission time threshold based on the average response time and the tolerance band includes calculating the second time threshold according to the following formula: T0=T0-△T / 2-floor(T0-△T / 2); Furthermore, determining the test threshold range based on the mean response time and the tolerance band includes, where the second test threshold range is: Less than or equal to T0 + △T / 2; Where T0 is the second time threshold, T0 is the average response time, △T is the tolerance band, and floor(T0-△T / 2) represents the integer rounding down from the value (T0-△T / 2).

5. The electronic pump testing method according to any one of claims 1-4, characterized in that, In step S1, the test bench determines the mean response time and tolerance band of the qualified electronic pump, including: After the qualified electronic pump is turned on, the qualified electronic pump periodically sends a status feedback signal to the test bench according to a specific interaction cycle. The test bench periodically sends a command signal to the qualified electronic pump according to a specific interaction cycle and obtains the response time measurement value of the qualified electronic pump. The test bench determines the mean response time and the tolerance band based on the response time measurement value. The specific interaction period is 0.1 to 0.3 times the signal interaction period.

6. An electronic pump testing system, characterized in that, The system is used to perform the electronic pump testing method as described in any one of claims 1-5; the electronic pump testing system includes a test bench; the test bench is used to connect to the electronic pump under test. The test bench determines the average response time and tolerance band of qualified electronic pumps, and determines the preset transmission time threshold and test threshold range based on the average response time and the tolerance band; After the electronic pump under test is turned on, it periodically sends a status feedback signal to the test bench according to the signal interaction cycle; the test bench also periodically sends a command signal to the electronic pump under test at preset intervals according to the signal interaction cycle after the electronic pump under test is turned on; the test bench records the feedback time of receiving the status feedback signal and the sending time of sending the command signal respectively. The test bench also calculates the time difference between the transmission time of sending the command signal and the feedback time of receiving the corresponding status feedback signal before sending the command signal, and determines whether the time difference is equal to the preset transmission time threshold. If not, the test bench adjusts the preset time; If so, the test bench also obtains the response time measurement value of the electronic pump under test, and determines whether the response time measurement value is within the range of the test threshold.

7. The electronic pump testing system as described in claim 6, characterized in that, The test bench includes interconnected signal transmission modules and detection modules; wherein... The signal sending module and the detection module are respectively connected to the electronic pump under test. The signal sending module is used to periodically send command signals to the electronic pump under test at preset intervals after the electronic pump under test is turned on, and record the sending time. The signal sending module also receives the status feedback signal and records the receiving time, calculates the difference between the sending time and the time of receiving the corresponding status feedback signal, and determines whether the difference is equal to a preset sending time threshold. The detection module is used to obtain the response time measurement value of the electronic pump under test, and to determine whether the response time measurement value is within the range of the test threshold.

8. The electronic pump testing system as described in claim 6 or 7, characterized in that, The test bench is also connected to a qualified electronic pump to determine the mean response time and tolerance band of the qualified electronic pump.

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