Method for testing static characteristics of suspension sensor

Abstract

The invention discloses a method for testing static characteristics of a suspension sensor, the static characteristics of the suspension sensor comprise gap static characteristics, and the gap static characteristics comprise gap measurement precision and consistency of gap probes. The method for testing the gap measurement precision and the consistency of each gap probe comprises the following steps: acquiring a first gap detection value of each gap probe of a suspension sensor in a movement process in a Z-axis direction; wherein the Z-axis direction is a vertical direction; calculating a first gap deviation of each gap probe and a second gap deviation between the gap probes according to a first gap detection value of each gap probe of the suspension sensor in the movement process in the Z-axis direction; according to the first gap deviation of each gap probe, judging whether the gap measurement precision of the suspension sensor meets the requirement or not; and judging whether the consistency of the gap probes of the suspension sensor meets the requirement or not according to the second gap deviation between the gap probes. The static characteristics of the suspension sensor are tested.

Description

Technical Field

[0001] The present invention belongs to the technical field of suspension sensor testing, and particularly relates to a method for testing the static characteristics of a suspension sensor. Background Art

[0002] A suspension sensor is used to detect the vertical gap and acceleration between a maglev vehicle and a track, and feedback the gap and acceleration to a suspension controller. The accuracy of the gap and acceleration signals fed back by the suspension sensor is crucial for the stability of the suspension system. There are multiple (e.g., 20) suspension sensors installed on each maglev vehicle. Any error in the detection of any one suspension sensor may cause the vehicle to become unstable or even derail. To ensure that the suspension sensor can provide reliable gap and acceleration signals, it is necessary to detect the static characteristics of the suspension sensor.

[0003] Currently, only the technical indicators of the suspension sensor are proposed, and there is no unified static characteristic detection method and requirements. There is no unified standard for each manufacturer on how to detect, which static characteristics to detect, and how to judge. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for testing the static characteristics of a suspension sensor to solve the problem of the lack of a unified static characteristic detection method in the prior art.

[0005] The present invention solves the above technical problems through the following technical solutions: A method for testing the static characteristics of a suspension sensor, the static characteristics of the suspension sensor include gap static characteristics, the gap static characteristics include gap measurement accuracy and the consistency of each gap probe, and the test methods for the gap measurement accuracy and the consistency of each gap probe include:

[0006] Obtain the first gap detection values of each gap probe of the suspension sensor during the movement in the Z-axis direction; wherein, the Z-axis direction refers to the vertical direction;

[0007] Calculate the first gap deviation of each gap probe and the second gap deviation between each gap probe according to the first gap detection values of each gap probe of the suspension sensor during the movement in the Z-axis direction;

[0008] Judge whether the gap measurement accuracy of the suspension sensor meets the requirements according to the first gap deviation of each gap probe; judge whether the consistency of each gap probe of the suspension sensor meets the requirements according to the second gap deviation between each gap probe.

[0009] Further, judging whether the gap measurement accuracy of the suspension sensor meets the requirements according to the first gap deviation of each gap probe specifically includes:

[0010] If the position of the suspension sensor is within the rated suspension gap range and the maximum value of the first gap deviation of each gap probe is not greater than the first preset threshold, the gap measurement accuracy of the suspension sensor meets the requirements;

[0011] If the position of the suspension sensor is outside the rated suspension gap range and the maximum value of the first gap deviation of each gap probe is not greater than the second preset threshold, the gap measurement accuracy of the suspension sensor meets the requirements; where the second preset threshold is greater than the first preset threshold;

[0012] Judging whether the consistency of each gap probe of the suspension sensor meets the requirements according to the second gap deviation between the gap probes, specifically including:

[0013] If the position of the suspension sensor is within the rated suspension gap range and the maximum value of the second gap deviation between the gap probes is not greater than the first preset threshold, the consistency of each gap probe of the suspension sensor meets the requirements;

[0014] If the position of the suspension sensor is outside the rated suspension gap range and the maximum value of the second gap deviation between the gap probes is not greater than the second preset threshold, the consistency of each gap probe of the suspension sensor meets the requirements.

[0015] Furthermore, the test method for the gap measurement accuracy and the consistency of each gap probe further includes testing the gap measurement accuracy of the suspension sensor and the consistency of each gap probe when any one of the gap probes stops working.

[0016] Furthermore, the gap static characteristic further includes the accuracy of crossing rail joints, and the test method for the accuracy of crossing rail joints includes:

[0017] Obtain the second gap detection values of each gap probe of the suspension sensor during the movement of crossing the rail joint;

[0018] Calculate the third gap deviation of each gap probe according to the second gap detection value at the starting position of the movement of crossing the rail joint of each gap probe; calculate the fourth gap deviation of each gap probe according to the second gap detection value at the ending position of the movement of crossing the rail joint of each gap probe; calculate the fifth gap deviation of each gap probe according to the second gap detection values at the starting position and the ending position of the movement of crossing the rail joint of each gap probe;

[0019] Judge whether the accuracy of crossing the rail joint of the suspension sensor meets the requirements according to the second gap detection value, the third gap deviation, the fourth gap deviation and the fifth gap deviation of each gap probe during the movement of crossing the rail joint.

[0020] Further, it is determined whether the accuracy of the suspension sensor when passing through the rail gap meets the requirements according to the second gap detection value, the third gap deviation, the fourth gap deviation, and the fifth gap deviation of each gap probe during the movement through the rail gap. Specifically, it includes:

[0021] If the third gap deviation, the fourth gap deviation, and the fifth gap deviation of each gap probe are not greater than the third preset threshold, and the curve formed by the second gap detection values of the gap probes of the suspension sensor during the movement through the rail gap has the same trend as the standard rail gap curve, then the accuracy of the suspension sensor when passing through the rail gap meets the requirements.

[0022] Further, the static characteristics of the gap also include the accuracy of deviating from the center line of the track. The test method for the accuracy of deviating from the center line of the track includes:

[0023] Obtain the third gap detection values of the gap probes of the suspension sensor during the movement deviating from the center line of the track;

[0024] Calculate the sixth gap deviation of each gap probe according to the maximum value of the third gap detection values of each gap probe during the movement deviating from the center line of the track;

[0025] Judge whether the accuracy of the suspension sensor deviating from the center line of the track meets the requirements according to the sixth gap deviation of each gap probe.

[0026] Further, the trajectory of the movement deviating from the center line of the track includes a first trajectory and a second trajectory. The first trajectory and the second trajectory are axisymmetric about the center line of the track, and the starting point of the first trajectory is the same as the ending point of the second trajectory, and the ending point of the first trajectory is the same as the starting point of the second trajectory;

[0027] Both the first trajectory and the second trajectory include a first inclined line segment, a straight line segment, and a second inclined line segment connected in sequence. The distance between the straight line segment and the center line of the track is equal to the maximum allowable deviation distance, and the length of the straight line segment is not less than the length of the entire probe surface of the suspension sensor;

[0028] The moving speed of each gap probe along the first trajectory is different from the moving speed of each gap probe along the second trajectory.

[0029] Further, the static characteristics of the gap also include being affected by rain. The specific test method includes:

[0030] Install the suspension sensor on a fixed bracket and under the track;

[0031] Obtain the fourth gap detection values of the gap probes of the suspension sensor when no water is sprayed, and calculate the average value of all the fourth gap detection values;

[0032] Obtain the fifth gap detection value of each gap probe of the suspension sensor during water spraying;

[0033] Calculate the difference between the fifth gap detection value of each gap probe and the average value of all fourth gap detection values;

[0034] Judge whether the influence of rain on the suspension sensor meets the requirements according to each of the differences.

[0035] Furthermore, the static characteristics of the gap also include temperature drift, and its specific test method includes:

[0036] Heat each gap probe of the suspension sensor;

[0037] Obtain the temperature and the sixth gap detection value of each gap probe of the suspension sensor after heating is stable;

[0038] Calculate the seventh gap deviation of each gap probe according to the sixth gap detection value of each gap probe;

[0039] Judge whether the temperature drift of the suspension sensor meets the requirements according to the temperature and the seventh gap deviation of each gap probe.

[0040] Furthermore, the static characteristics of the suspension sensor also include acceleration static characteristics, and the test method of the acceleration static characteristics includes:

[0041] Obtain the first acceleration detection value, the second acceleration detection value and the third acceleration detection value of each gap probe surface of the suspension sensor when it is in the vertically downward, vertically upward and horizontal positions respectively;

[0042] Calculate the first acceleration deviation, the second acceleration deviation, the third acceleration deviation and the fourth acceleration deviation respectively according to the first acceleration detection value, the second acceleration detection value and the third acceleration detection value;

[0043] Judge whether the acceleration static characteristics of the suspension sensor meet the requirements according to the first acceleration deviation, the second acceleration deviation, the third acceleration deviation and the fourth acceleration deviation.

[0044] Beneficial effects

[0045] Compared with the prior art, the advantages of the present invention are as follows:

[0046] The present invention realizes the test of the static characteristics of the suspension sensor, provides a unified test method and standard for the test of the static characteristics of the suspension sensor, can be used as the factory experiment content of the suspension sensor, and is simple and convenient, easy to promote and popularize.

[0047] For the suspension sensor passing the static characteristic test of the present invention, the failure rate is greatly reduced after being installed on the vehicle, and the reliability of the suspension sensor is improved. Brief Description of the Drawings

[0048] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only one embodiment of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0049] Figure 1 It is a schematic diagram of the positions of the first F-shaped track and the second F-shaped track when crossing the rail gap in the embodiment of the present invention;

[0050] Figure 2 It is the standard curve for crossing the rail gap in the embodiment of the present invention, where the abscissa represents the serial number corresponding to each gap value;

[0051] Figure 3 It is a schematic diagram of the movement deviating from the center line of the track in the embodiment of the present invention;

[0052] Figure 4 It is a schematic diagram of the installation of the suspension sensor in the embodiment of the present invention.

[0053] Description of the reference numerals: 1 - the first F-shaped track, 2 - the second F-shaped track, 3 - the suspension sensor, 4 - the starting point of the first track or the ending point of the second track, 5 - the ending point of the first track or the starting point of the second track, 6 - the F-shaped track, 7 - the fixed bracket. Detailed Embodiments

[0054] The technical solutions in the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0055] The technical solutions of the present application will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0056] The static characteristics of the suspension sensor include the gap static characteristics and the acceleration static characteristics. The gap static characteristics include gap measurement accuracy, consistency of each gap probe, accuracy of crossing the rail gap, accuracy of deviating from the center line of the track, influence of rain, temperature drift, etc. Design multiple-dimensional gap static characteristic test experiments to accurately test the static characteristics of the suspension sensor.

[0057] (1) Test of gap measurement accuracy and consistency of each gap probe

[0058] In a specific embodiment of the present invention, the test method for the gap measurement accuracy and the consistency of each gap probe includes:

[0059] Step A1: Obtain the first gap detection values of each gap probe of the suspension sensor during the movement in the Z-axis direction.

[0060] Among them, the Z-axis direction refers to the vertical direction, and the movement in the Z-axis direction means that the suspension sensor moves towards the F-shaped track, or away from the F-shaped track, or moves back and forth. During the movement in the Z-axis direction, each time the suspension sensor moves, the pause time is t, and at this time, a first gap detection value of each gap probe is obtained. The moving step of the suspension sensor is set to 1 mm to 2 mm. The first gap detection value of each gap probe obtained by a single movement in the Z-axis direction is denoted as indicating the first gap detection value of the i-th gap probe at the m-th pause position, and the position P of the i-th gap probe at the m-th pause position m is equal to the sum of the initial position of the suspension sensor and m moving steps, that is, P m = P 0 + m×ΔL, P 0 represents the initial position of the suspension sensor, and ΔL represents the moving step.

[0061] When obtaining the first gap detection value, the detection surface of each gap probe faces the detection surface of the F-shaped track, and this detection surface is a high-precision detection surface, reducing the influence of the detection surface on the detection result.

[0062] Step A2: Calculate the first gap deviation of each gap probe and the second gap deviation between each gap probe according to the first gap detection values of each gap probe of the suspension sensor during the movement in the Z-axis direction.

[0063] The specific calculation formula for the first gap deviation is:

[0064]

[0065] where GD i1 represents the first gap deviation of the i-th gap probe at the m-th pause position P m .

[0066] The specific calculation formula for the second gap deviation is:

[0067]

[0068] where GD ij2 represents the second gap deviation between the i-th gap probe and the j-th gap probe at the m-th pause position P m .

[0069] Step A3: According to the first gap deviation GD of each gap probe i1 Judge whether the gap measurement accuracy of the suspension sensor meets the requirements; according to the second gap deviation GD between each gap probe ij2 Judge whether the consistency of each gap probe of the suspension sensor meets the requirements.

[0070] In a specific embodiment of the present invention, according to the first gap deviation GD of each gap probe i1 Judge whether the gap measurement accuracy of the suspension sensor meets the requirements, specifically including:

[0071] If the position of the suspension sensor is within the rated suspension gap range, and the maximum value of the first gap deviation GD of each gap probe i1 is not greater than the first preset threshold, then the gap measurement accuracy of the suspension sensor meets the requirements;

[0072] If the position of the suspension sensor is within a non-rated suspension gap range, and the maximum value of the first gap deviation GD of each gap probe i1 is not greater than the second preset threshold, then the gap measurement accuracy of the suspension sensor meets the requirements.

[0073] Among them, the second preset threshold is greater than the first preset threshold. In this embodiment, the rated suspension gap range is [8mm, 10mm], and the maximum value of the first gap deviation GD of each gap probe i1 refers to the maximum value of the first gap deviation of each gap probe at all pause positions. The non-rated suspension gap range is [the lower limit of the range of the suspension sensor, the lower limit of the rated suspension gap range) and (the upper limit of the rated suspension gap range, the upper limit of the range of the suspension sensor].

[0074] In a specific embodiment of the present invention, according to the second gap deviation GD between each gap probe ij2 Judge whether the consistency of each gap probe of the suspension sensor meets the requirements, specifically including:

[0075] If the position of the suspension sensor is within the rated suspension gap range, and the maximum value of the second gap deviation GD between each gap probe ij2 is not greater than the first preset threshold, then the consistency of each gap probe of the suspension sensor meets the requirements;

[0076] If the position of the suspension sensor is within a non-rated suspension gap range, and the maximum value of the second gap deviation GD between each gap probe ij2 is not greater than the second preset threshold, then the consistency of each gap probe of the suspension sensor meets the requirements.

[0077] In this embodiment, the second gap deviation GD between each gap probe ij2The maximum value refers to the maximum value among the second gap deviations at all pause positions between the gap probes.

[0078] To ensure the test reliability of the gap measurement accuracy and the consistency of each gap probe, multiple Z-axis movements can be performed. The speeds of each Z-axis movement can be the same or different. If the gap measurement accuracy of the suspension sensor and the consistency of each gap probe corresponding to each Z-axis movement meet the requirements, it indicates that the gap measurement accuracy of the suspension sensor and the consistency of each gap probe meet the requirements.

[0079] In the specific embodiment of the present invention, to test the mutual interference problem between the gap probes of the suspension sensor, the test method for the gap measurement accuracy and the consistency of each gap probe further includes testing the gap measurement accuracy of the suspension sensor and the consistency of each gap probe when any one of the gap probes stops working. That is, disconnect the power supply of one of the gap probes respectively to make the gap probe stop working, and then test the gap measurement accuracy of the suspension sensor and the consistency of each gap probe according to steps A1 to A3, so as to test whether there is an impact on the measurement accuracy and consistency of other gap probes when one of the gap probes fails.

[0080] (2) Test of the accuracy of crossing the rail gap

[0081] In the specific embodiment of the present invention, the test method for the accuracy of crossing the rail gap includes:

[0082] Step B1: Obtain the second gap detection values of each gap probe of the suspension sensor during the movement of crossing the rail gap.

[0083] Adjust the distance between the first F-shaped rail 1 and the second F-shaped rail 2 to the maximum allowable distance D, and adjust the height difference between the first F-shaped rail 1 and the second F-shaped rail 2 to the maximum allowable height H, as Figure 1 shown. The movement of the suspension sensor from the first F-shaped rail 1 to the second F-shaped rail 2 is the movement of crossing the rail gap. The initial position of the suspension sensor on the first F-shaped rail 1 is the starting position of the movement of crossing the rail gap, and the termination position of the suspension sensor on the second F-shaped rail 2 is the termination position of the movement of crossing the rail gap. The second gap detection value of each gap probe at the starting position of the movement of crossing the rail gap is denoted as indicating the second gap detection value of the i-th gap probe at the starting position of the movement of crossing the rail gap; the second gap detection value of each gap probe at the termination position of the movement of crossing the rail gap is denoted as indicating the second gap detection value of the i-th gap probe at the termination position of the movement of crossing the rail gap. To ensure the accuracy of the second gap detection value, each gap probe is detected multiple times at the starting position and the termination position of the movement of crossing the rail gap, and then the average value of the gap values detected multiple times is taken as

[0084] Step B2: Calculate the third gap deviation of each gap probe according to the second gap detection value at the starting position of the gap probe during the movement across the rail gap; calculate the fourth gap deviation of each gap probe according to the second gap detection value at the ending position of the gap probe during the movement across the rail gap; calculate the fifth gap deviation of each gap probe according to the second gap detection values at the starting and ending positions of the gap probe during the movement across the rail gap.

[0085] The specific calculation formula for the third gap deviation is:

[0086]

[0087] wherein, GD i3 represents the third gap deviation of the i-th gap probe at the starting position of the movement across the rail gap, and S represents the distance between the gap probe surface and the F-type rail detection surface. Since the farther the eddy current sensor measures the distance, the less accurate the measurement result is, it is generally considered that there will be no deviation across the rail gap at the proximal end of the suspension sensor range. In the present invention, only two working conditions of the rated suspension gap and the suspension gap at the distal end of the range for the distance S between the gap probe surface and the F-type rail detection surface are tested, that is, when the distance S between the suspension sensor gap probe surface and the F-type rail detection surface is the rated suspension gap, the accuracy across the rail gap is tested; and when the distance S between the suspension sensor gap probe surface and the F-type rail detection surface is the suspension gap at the distal end of the range, the accuracy across the rail gap is tested. If the accuracy across the rail gap under both the rated suspension gap and the suspension gap at the distal end of the range meets the requirements, then the accuracy of the suspension sensor across the rail gap meets the requirements.

[0088] In this embodiment, the rated suspension gap S 额 is 8 mm to 10 mm; the suspension gap at the distal end of the range S 远 refers to the end close to the maximum value of the suspension sensor range. For example, if the range of the suspension sensor is 0 to 20 mm, then the suspension gap at the distal end of the range S 远 is 15 mm to 20 mm.

[0089] The specific calculation formula for the fourth gap deviation is:

[0090]

[0091] wherein, GD i4 represents the fourth gap deviation of the i-th gap probe at the ending position of the movement across the rail gap. Similarly, there are also two working conditions for the fourth gap deviation, that is, the fourth gap deviation when the distance S between the suspension sensor gap probe surface and the F-type rail detection surface is the rated suspension gap, and the fourth gap deviation when the distance S between the suspension sensor gap probe surface and the F-type rail detection surface is the suspension gap at the distal end of the range.

[0092] The specific calculation formula for the fifth gap deviation is as follows:

[0093]

[0094] where GD i5 represents the fifth gap deviation of the i-th gap probe.

[0095] Step B3: Determine whether the over-rail joint accuracy of the suspension sensor meets the requirements based on the second gap detection value, the third gap deviation, the fourth gap deviation, and the fifth gap deviation of each gap probe during the movement across the rail joint.

[0096] In the specific embodiment of the present invention, determining whether the over-rail joint accuracy of the suspension sensor meets the requirements based on the second gap detection value, the third gap deviation, the fourth gap deviation, and the fifth gap deviation of each gap probe during the movement across the rail joint specifically includes:

[0097] If the third gap deviation GD i3 , the fourth gap deviation GD i4 , and the fifth gap deviation GD i5 of each gap probe are all not greater than the third preset threshold, and the curve formed by the second gap detection values of the gap probes of the suspension sensor during the movement across the rail joint has the same trend as the standard over-rail joint curve, then the over-rail joint accuracy of the suspension sensor meets the requirements. That is, the over-rail joint accuracy tests are respectively completed when the distance S between the gap probe surface of the suspension sensor and the F-type rail detection surface is the rated suspension gap S 额 , and when the distance S between the gap probe surface of the suspension sensor and the F-type rail detection surface is the far-end suspension gap S 远 of the range.

[0098] The third preset threshold under the condition that the distance S between the gap probe surface of the suspension sensor and the F-type rail detection surface is the rated suspension gap is less than the third preset threshold under the condition that the distance S between the gap probe surface of the suspension sensor and the F-type rail detection surface is the far-end suspension gap of the range, that is, there are higher test requirements in the rated suspension gap range.

[0099] The standard over-rail joint curve is pre-tested by using a suspension sensor that meets the over-rail joint accuracy requirements, as shown in Figure 2 . The curve formed by the second gap detection values of the gap probes of the suspension sensor during the movement across the rail joint having the same trend as the standard over-rail joint curve means that the trends of the two curves are the same, and the maximum gap value and the gap values in the rising and falling stages are basically the same.

[0100] To ensure the test reliability of the accuracy of passing through the rail gap, multiple movements of passing through the rail gap can be carried out, and the speeds of each movement of passing through the rail gap can be the same or different. If the accuracy of passing through the rail gap of the suspension sensor corresponding to each movement of passing through the rail gap meets the requirements, it indicates that the accuracy of passing through the rail gap of the suspension sensor meets the requirements.

[0101] (3) Test of the accuracy of deviating from the center line of the track

[0102] In the specific embodiment of the present invention, the test method for the accuracy of deviating from the center line of the track includes:

[0103] Step C1: Obtain the third gap detection values of each gap probe of the suspension sensor during the movement of deviating from the center line of the track.

[0104] In this embodiment, the trajectory of the movement of deviating from the center line of the track includes a first trajectory and a second trajectory. The first trajectory and the second trajectory are axisymmetric about the center line of the track, and the starting point 4 of the first trajectory is the same as the ending point 4 of the second trajectory, and the ending point 5 of the first trajectory is the same as the starting point 5 of the second trajectory; both the first trajectory and the second trajectory include a first oblique line segment, a straight line segment, and a second oblique line segment connected in sequence. The distance between the straight line segment and the center line of the track is equal to the maximum allowable deviation distance L1, and the length of the straight line segment is not less than the length L2 of the entire probe surface of the suspension sensor; the speed of each gap probe moving along the first trajectory is different from the speed of each gap probe moving along the second trajectory.

[0105] As Figure 3 shown, the movement of the suspension sensor deviating from the center line of the track is specifically: the suspension sensor 3 moves along the first oblique line segment of the first trajectory at the first speed v1 (that is, the included angle between the movement direction of the suspension sensor 3 and the center line of the track is α), then moves along the straight line segment of the first trajectory, and then moves along the second oblique line segment of the first trajectory (that is, the included angle between the movement direction of the suspension sensor 3 and the center line of the track is β), thus completing the movement of the first trajectory; the suspension sensor 3 moves along the second oblique line segment of the second track at the second speed v2 (that is, the included angle between the movement direction of the suspension sensor 3 and the center line of the track is β), then moves along the straight line segment of the second trajectory, and then moves along the first oblique line segment of the second trajectory (that is, the included angle between the movement direction of the suspension sensor 3 and the center line of the track is α), thus completing the movement of the second trajectory. The first speed v1 is different from the second speed v2, and the first speed v1 is less than the second speed v2.

[0106] During the movement of deviating from the center line of the track, each gap probe of the suspension sensor collects multiple third gap detection values, and the maximum value among the multiple third gap detection values is denoted as indicating the maximum value of the third gap detection value of the i-th gap probe during the movement of deviating from the center line of the track.

[0107] Step C2: Calculate the sixth gap deviation of each gap probe according to the maximum value of the third gap detection value during the movement of each gap probe deviating from the center line of the track.

[0108] The specific calculation formula for the sixth gap deviation is:

[0109]

[0110] where, GD i6 represents the sixth gap deviation of the i-th gap probe during the movement deviating from the center line of the track, and S represents the distance between the gap probe surface and the F-type track detection surface.

[0111] The test of the deviation accuracy from the center line of the track also needs to be carried out under two working conditions, that is, the test of the deviation accuracy from the center line of the track when the distance S between the gap probe surface of the suspension sensor and the F-type track detection surface is the rated suspension gap S 额 and the test of the deviation accuracy from the center line of the track when the distance S between the gap probe surface of the suspension sensor and the F-type track detection surface is the far-end suspension gap S 远 of the range. If the deviation accuracy from the center line of the track under the two working conditions of the rated suspension gap and the far-end suspension gap of the range meets the requirements, then the deviation accuracy from the center line of the track of the suspension sensor meets the requirements.

[0112] Step C3: Judge whether the deviation accuracy from the center line of the track of the suspension sensor meets the requirements according to the sixth gap deviation GD i6 of each gap probe.

[0113] If the sixth gap deviation GD i6 of each gap probe is not greater than the fourth preset threshold, then the deviation accuracy from the center line of the track of the suspension sensor meets the requirements. The fourth preset threshold under the condition that the distance S between the gap probe surface of the suspension sensor and the F-type track detection surface is the rated suspension gap is less than the fourth preset threshold under the condition that the distance S between the gap probe surface of the suspension sensor and the F-type track detection surface is the far-end suspension gap of the range, that is, there are higher test requirements in the rated suspension gap interval.

[0114] (4) Test of the suspension sensor affected by rain

[0115] In the specific implementation manner of the present invention, the test method affected by rain includes:

[0116] Step D1: Install the suspension sensor 3 on the fixed bracket 7 and below the F-type track 6, as Figure 4 shown.

[0117] Step D2: Align the gap probes of the suspension sensor 3 with the detection surface of the F-shaped track 6, obtain the fourth gap detection values of each gap probe of the suspension sensor 3 when no water is sprayed, and calculate the average value of all the fourth gap detection values, denoted as represents the average value of all the fourth gap detection values of the i-th gap probe.

[0118] Step D3: Obtain the fifth gap detection values of each gap probe of the suspension sensor 3 when water is sprayed.

[0119] Spray water on the suspension sensor 3 with different flow rates, and obtain the fifth gap detection values of each gap probe of the suspension sensor 3. There are multiple fifth gap detection values for each gap probe, denoted as represents the k-th fifth gap detection value of the i-th gap probe.

[0120] Step D4: Calculate the difference between the fifth gap detection value of each gap probe and the average value of all the fourth gap detection values. The specific calculation formula is:

[0121]

[0122] where GD imax represents the difference of the i-th gap probe,

[0123] Step D5: According to each difference GD imax Judge whether the influence of rain on the suspension sensor meets the requirements.

[0124] If the difference of each gap probe is not greater than the fifth preset threshold, the influence of rain on the suspension sensor meets the requirements; otherwise, it does not meet the requirements. The distance S between the gap probe surface of the suspension sensor and the detection surface of the F-shaped track is that the fifth preset threshold under the rated suspension gap condition is less than the fifth preset threshold under the range far-end suspension gap condition of the distance S between the gap probe surface of the suspension sensor and the detection surface of the F-shaped track, that is, there are higher test requirements in the rated suspension gap range.

[0125] The test of the influence of rain also needs to be carried out under two working conditions, that is, the test of the influence of rain when the distance S between the gap probe surface of the suspension sensor and the detection surface of the F-shaped track is the rated suspension gap S 额 and the test of the influence of rain when the distance S between the gap probe surface of the suspension sensor and the detection surface of the F-shaped track is the range far-end suspension gap S 远 When the influence of rain under both the rated suspension gap and the range far-end suspension gap working conditions meets the requirements, the influence of rain on the suspension sensor meets the requirements.

[0126] (5) Test of temperature drift

[0127] In a specific embodiment of the present invention, the test method of temperature drift includes:

[0128] Step E1: heating each gap probe of the suspension sensor.

[0129] The suspension sensor 3 is mounted on the fixed bracket 7 and is located below the F-type track 6. Figure 4 As shown, the gap probe surface of the suspension sensor 3 is aligned with the detection surface of the F-type track 6, and the distance between the gap probe surface of the suspension sensor 3 and the detection surface of the F-type track 6 is the rated suspension gap S 额 and the suspension gap S at the far end of the measuring range 远 , respectively test the suspension sensor temperature drift under these two working conditions. If the suspension sensor temperature drift under the two working conditions of rated suspension gap and remote suspension gap meets the requirements, then the suspension sensor temperature drift meets the requirements.

[0130] The surfaces of the interspace probes of the suspension sensor 3 are heated, and the heating conditions are divided into two types: the temperatures of the interspace probe surfaces are the same and the temperatures are different.

[0131] Step E2: Obtain the temperature of each gap probe of the suspension sensor after heating and stabilization and the sixth gap detection value.

[0132] Heating stability means that within the time T, even if heated again, the temperature change of each gap probe surface does not exceed the first temperature threshold (for example, +1°C). At this time, the temperature of each gap probe surface (for example, 80°C) is the temperature of each gap probe after heating stability, which is recorded as T i , T i Indicates the temperature of the i-th gap probe after heating stabilization. The temperature of the gap probe is detected by the temperature sensor of the gap probe.

[0133] After the heating of each gap probe surface is stabilized, the sixth gap detection value of each gap probe is obtained. Each gap probe has multiple sixth gap detection values. The average of the multiple sixth gap detection values ​​of each gap probe is calculated and recorded as Represents the mean of all sixth gap detection values ​​of the i-th gap probe.

[0134] Step E3: Calculating the seventh gap deviation of each gap probe according to the sixth gap detection value of each gap probe.

[0135] The specific calculation formula of the seventh gap deviation is:

[0136]

[0137] Among them, GD i7 Represents the 7th gap deviation of the ith gap probe.

[0138] Step E4: Based on the temperature T of each gap probei and seventh gap deviation GD i7 Determine whether the temperature drift of the suspension sensor meets the requirements.

[0139] If the temperature of each gap probe is T i The second temperature threshold is not exceeded, and the seventh gap deviation GD of each gap probe i7 The distance S between the suspension sensor gap probe surface and the F-type track detection surface is less than the sixth preset threshold value under the rated suspension gap working condition. The distance S between the suspension sensor gap probe surface and the F-type track detection surface is less than the sixth preset threshold value under the far-end suspension gap working condition, that is, there are higher test requirements in the rated suspension gap range.

[0140] (6) Test of static acceleration characteristics

[0141] In a specific embodiment of the present invention, the test method of the static characteristics of acceleration includes:

[0142] Step F1: respectively obtaining the first acceleration detection value, the second acceleration detection value and the third acceleration detection value when each gap probe surface of the suspension sensor is in the vertical downward, vertical upward and horizontal positions.

[0143] The first acceleration detection value, the second acceleration detection value and the third acceleration detection value when the probe surface of each gap of the suspension sensor is in the vertical downward, vertical upward and horizontal positions are respectively recorded as A n1avg , A n2avg and A n3avg , A n1avg It represents the first acceleration detection value collected by the nth acceleration sensor when the probe surface of each gap of the suspension sensor is vertically downward, A n2avg It represents the second acceleration detection value collected by the nth acceleration sensor when the probe surface of each gap of the suspension sensor is vertically upward, A n3avg It represents the third acceleration detection value collected by the nth acceleration sensor when the gap probe surfaces of the suspension sensor are in a horizontal position. The average value of all the third acceleration detection values ​​is taken as the theoretical acceleration value and recorded as ACC. The acceleration sensor is built into the suspension sensor. Each acceleration sensor collects multiple acceleration values. The average value of multiple acceleration values ​​at each position is calculated to obtain the corresponding acceleration detection value. For example, when the gap probe surfaces of the suspension sensor are in a vertical downward position, the nth acceleration sensor collects multiple acceleration values. The average value of multiple acceleration values ​​of the nth acceleration sensor in the vertical downward position is calculated to obtain the first acceleration detection value A. n1avg .

[0144] Step F2: Calculate the first acceleration deviation, the second acceleration deviation, the third acceleration deviation, and the fourth acceleration deviation respectively according to the first acceleration detection value, the second acceleration detection value, and the third acceleration detection value.

[0145] The calculation formula for the first acceleration deviation is:

[0146] A n1 =|A n1avg -ACC| (9)

[0147] Where, A n1 represents the first acceleration deviation of the nth acceleration sensor when each gap probe surface of the suspension sensor is vertically downward.

[0148] The calculation formula for the second acceleration deviation is:

[0149] A n2 =|A n2avg -ACC| (10)

[0150] Where, A n2 represents the second acceleration deviation of the nth acceleration sensor when each gap probe surface of the suspension sensor is vertically upward.

[0151] The calculation formula for the third acceleration deviation is:

[0152] A 3 =|A 11avg +…+A n1avg +…+A N1avg -ACC| (11)

[0153] Where, A 3 represents the third acceleration deviation, and the subscript N of A N1avg represents the number of acceleration sensors.

[0154] The calculation formula for the fourth acceleration deviation is:

[0155] A 4 =|A 12avg +…+A n2avg +…+A N2avg -ACC| (12)

[0156] Where, A 4 represents the fourth acceleration deviation.

[0157] Step F3: According to the first acceleration deviation A n1 、the second acceleration deviation A n2 、the third acceleration deviation A 3 and the fourth acceleration deviation A 4Judge whether the acceleration static characteristics of the suspension sensor meet the requirements.

[0158] If each first acceleration deviation A n1 and each second acceleration deviation A n2 are not greater than the seventh preset threshold, and the third acceleration deviation A 3 and the fourth acceleration deviation A 4 are not greater than the eighth preset threshold, then the acceleration static characteristics of the suspension sensor meet the requirements.

[0159] If the gap measurement accuracy, the consistency of each gap probe, the accuracy of crossing the rail joint, the accuracy of deviating from the center line of the track, the influence of rain, the temperature drift and the acceleration static characteristics of the suspension sensor all meet the requirements, then the static characteristics of the suspension sensor meet the requirements.

[0160] The above-disclosed are only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or modifications, which should all be covered within the protection scope of the present invention.

Claims

1. A static characteristic test method of a suspension sensor, characterized in that: The static characteristics of the suspension sensor include gap static characteristics, and the gap static characteristics include gap measurement accuracy and consistency of each gap probe. The test method of the gap measurement accuracy and consistency of each gap probe includes: Obtaining a first gap detection value of each gap probe of the suspension sensor during movement in the Z-axis direction; wherein the Z-axis direction refers to the vertical direction; Calculate a first gap deviation of each gap probe and a second gap deviation between the gap probes according to a first gap detection value of each gap probe of the suspension sensor during movement in the Z-axis direction; Whether the gap measurement accuracy of the suspension sensor meets the requirement is determined according to the first gap deviation of each gap probe; and whether the consistency of the gap probes of the suspension sensor meets the requirement is determined according to the second gap deviation between the gap probes.

2. The static characteristic test method of the suspension sensor according to claim 1, characterized in that: Judging whether the gap measurement accuracy of the suspension sensor meets the requirement according to the first gap deviation of each gap probe specifically includes: If the position of the suspension sensor is within the rated suspension gap interval, and the maximum value of the first gap deviation of each gap probe is not greater than the first preset threshold, then the gap measurement accuracy of the suspension sensor meets the requirement; If the position of the suspension sensor is in a non-rated suspension gap interval, and the maximum value of the first gap deviation of each gap probe is not greater than the second preset threshold, then the gap measurement accuracy of the suspension sensor meets the requirement; wherein the second preset threshold is greater than the first preset threshold; Judging whether the consistency of each gap probe of the suspension sensor meets the requirement according to the second gap deviation between each gap probe specifically includes: If the position of the suspension sensor is within the rated suspension gap interval, and the maximum value of the second gap deviation between the gap probes is not greater than the first preset threshold, then the consistency of the gap probes of the suspension sensor meets the requirement; If the position of the suspension sensor is in the non-rated suspension gap interval, and the maximum value of the second gap deviation between the gap probes is not greater than the second preset threshold, the consistency of the gap probes of the suspension sensor meets the requirement.

3. The static characteristic test method of a suspension sensor according to claim 1 or 2, characterized in that: The method for testing the gap measurement accuracy and the consistency of each gap probe also includes testing the gap measurement accuracy of the suspension sensor and the consistency of each gap probe when any gap probe stops working.

4. The static characteristic test method of a suspension sensor according to claim 1, characterized in that: The static characteristics of the gap also include the track gap accuracy, and the test method of the track gap accuracy includes: Obtaining a second gap detection value of each gap probe of the suspension sensor during the movement across the track gap; The third gap deviation of each gap probe is calculated according to the second gap detection value of each gap probe at the starting position of the movement across the rail gap; the fourth gap deviation of each gap probe is calculated according to the second gap detection value of each gap probe at the ending position of the movement across the rail gap; the fifth gap deviation of each gap probe is calculated according to the second gap detection value of each gap probe at the starting position and the ending position of the movement across the rail gap; Whether the track gap accuracy of the suspension sensor meets the requirements is judged according to the second gap detection value, the third gap deviation, the fourth gap deviation and the fifth gap deviation of each gap probe during the track gap movement.

5. The static characteristic test method of the suspension sensor according to claim 4, characterized in that: Judging whether the track gap accuracy of the suspension sensor meets the requirements according to the second gap detection value, the third gap deviation, the fourth gap deviation and the fifth gap deviation of each gap probe during the track gap movement specifically includes: If the third gap deviation, the fourth gap deviation and the fifth gap deviation of each gap probe are not greater than the third preset threshold value, and the curve formed by the second gap detection values ​​of each gap probe of the suspension sensor during the track gap movement has the same trend as the standard track gap curve, then the track gap accuracy of the suspension sensor meets the requirements.

6. The static characteristic test method of a suspension sensor according to claim 1, characterized in that: The static characteristic of the gap also includes the accuracy of deviation from the track centerline, and the test method of the accuracy of deviation from the track centerline includes: Obtaining a third gap detection value of each gap probe of the suspension sensor during the movement away from the track centerline; Calculating a sixth gap deviation of each gap probe according to a maximum value of a third gap detection value of each gap probe during movement away from the track centerline; It is determined whether the deviation accuracy of the suspension sensor from the track center line meets the requirement according to the sixth gap deviation of each gap probe.

7. The static characteristic test method of the suspension sensor according to claim 6, characterized in that: The trajectory of the movement deviating from the orbit centerline includes a first trajectory and a second trajectory, the first trajectory and the second trajectory are axisymmetric about the orbit centerline, and the starting point of the first trajectory is the same as the end point of the second trajectory, and the end point of the first trajectory is the same as the starting point of the second trajectory; The first track and the second track both include a first oblique line segment, a straight line segment and a second oblique line segment connected in sequence, the distance between the straight line segment and the track centerline is equal to the maximum allowable deviation distance, and the length of the straight line segment is not less than the length of the entire probe surface of the suspension sensor; The speed at which each gap probe moves along the first track is different from the speed at which each gap probe moves along the second track.

8. The static characteristic testing method of a suspension sensor according to claim 1, characterized in that: The static characteristics of the gap also include the influence of rain, and the specific test method includes: Install the suspension sensor on a fixed bracket and below the track; Obtaining the fourth gap detection value of each gap probe of the suspension sensor when no water is sprayed, and calculating the average value of all the fourth gap detection values; Acquire the fifth gap detection value of each gap probe of the suspension sensor during water spraying; Calculating the difference between the fifth gap detection value of each gap probe and the average value of all fourth gap detection values; It is determined according to each of the differences whether the suspension sensor is affected by rainwater to meet the requirements.

9. The static characteristic test method of a suspension sensor according to claim 1, characterized in that: The static characteristics of the gap also include temperature drift, and the specific test method thereof includes: heating each gap probe of the suspension sensor; Obtaining the temperature of each gap probe and the sixth gap detection value of the suspension sensor after heating and stabilization; Calculating a seventh gap deviation of each gap probe according to a sixth gap detection value of each gap probe; It is determined whether the temperature drift of the suspension sensor meets the requirement according to the temperature of each gap probe and the seventh gap deviation.

10. The static characteristic test method of a suspension sensor according to claim 1, characterized in that: The static characteristic of the suspension sensor also includes the static characteristic of acceleration. The test method of the static characteristic of acceleration includes: Respectively obtaining a first acceleration detection value, a second acceleration detection value, and a third acceleration detection value when each gap probe surface of the suspension sensor is in a vertical downward, vertical upward, and horizontal position; Calculating a first acceleration deviation, a second acceleration deviation, a third acceleration deviation and a fourth acceleration deviation respectively according to the first acceleration detection value, the second acceleration detection value and the third acceleration detection value; Whether the acceleration static characteristic of the suspension sensor meets the requirement is judged according to the first acceleration deviation, the second acceleration deviation, the third acceleration deviation and the fourth acceleration deviation.

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