CN107741328B - Automatic determination method for train brake test curve - Google Patents
Automatic determination method for train brake test curve Download PDFInfo
- Publication number
- CN107741328B CN107741328B CN201710941816.8A CN201710941816A CN107741328B CN 107741328 B CN107741328 B CN 107741328B CN 201710941816 A CN201710941816 A CN 201710941816A CN 107741328 B CN107741328 B CN 107741328B
- Authority
- CN
- China
- Prior art keywords
- test
- leakage
- main pipe
- air pressure
- interval
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses an automatic judging method for a train brake test curve, which comprises the following steps: the method comprises the steps of measuring leakage, measuring a first-order difference quotient at the ith air pressure value, measuring a second-order difference quotient at the ith air pressure value, and performing main pipe leakage, sensitivity leakage, stable leakage, simple test and pressure maintaining test for a certain time according to pressure maintaining leakage calculation and leakage interval mark points.
Description
Technical Field
The invention relates to the field of train brake tests, in particular to an automatic determination method for a train brake test curve.
Background
The test of the train braking process can be train braking control, at present, in the train brake test, the starting point of each pressure maintaining leakage test needs to be judged and operated manually, and then whether the leakage is qualified is judged, so that the automatic management is inconvenient, and great inconvenience is brought to train workers.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an automatic judgment method for a train brake test curve, which realizes the functions of real-time leakage calculation and final automatic judgment of the train brake test curve and reduces manual operation and judgment.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention discloses an automatic judging method for a train brake test curve, which comprises the following steps:
measuring leakage amount: the statistical average slope of n air pressure value sampling values (n is more than or equal to 10 and less than or equal to 60) on the air pressure curve is as follows:
determining the first order difference quotient at the ith air pressure value:
to reduce the noise effect, a moving average of 10 samples should be performed:
1c. determining the ithSecond order difference quotient at barometric pressure value:
to reduce the noise effect, a moving average of 10 samples should be performed:
1d, performing a main pipe leakage test, a sensitivity leakage test, a stable leakage test, a simple test and a continuous pressure maintaining test according to the pressure maintaining leakage amount calculation and the leakage interval mark points;
1e, identifying all tests, all tests lasting for a certain time and brief tests, only one test is taken for each test, if 2 types of characteristics from 1f to 1h do not meet the requirements, judging that the test is incomplete, and confirming all the tests, confirming all the tests lasting for a certain time and confirming the brief tests;
1f, judging all tests, wherein all tests only comprise a main pipe leakage test, a sensitivity leakage test, a stable leakage test and a continuous pressure maintaining test, and totally 4 tests are carried out, wherein all tests can be judged to be qualified only when all 4 tests are qualified, and if more than 1 test of the 4 tests is not completed, all tests are judged to be incomplete;
short test integrity is judged by the air pressure of the short test.
As a preferred embodiment of the present invention, the main pipe leakage test, the sensitivity leakage test, the stable leakage test, the simplified test and the continuous pressure maintaining test in step 1d all need to satisfy the effective test conditions of constant pressure, and the processes of the main pipe leakage test, the sensitivity leakage test, the stable leakage test, the simplified test and the continuous pressure maintaining test are respectively as follows:
the method for effectively judging the constant pressure comprises the following steps:
2a1.P0meets the stable condition
Or
Pressure maintaining is started;
2a2. if P0If the pressure is already at the position of 600 +/-20 kPa, the pressure is directly judged to be effective; otherwise, carrying out subsequent judgment processing;
2a3. from P0Begin left search Px，x＝1，2，……；
2a4. calculating dx＝(Px-P0)/x＞0；
2a5. if dx+1≥dxThe search continues; if d isx+1＜dxThen P is1＝Px；
2a6. if P1+3 position
Or
If P1Point to point 3 to the left (
Or
) Then P is1I is the ith air pressure value in the step, which is the starting point of air exhaust;
2a7. if P is not more than 580kPa1The constant pressure is effective when the pressure is less than or equal to 620 kPa;
if the interval meeting the leakage test condition of the main pipe is more than 60s, judging that the leakage test of the main pipe is effective, taking the first 60 sampling points of the interval as the effective interval of the actual leakage test of the main pipe, marking the effective interval on a curve by using mark points at the beginning and the end of the effective interval, calculating k values of 60 air pressure values in the interval, and converting the k values into the leakage test quantity of the main pipe per minute according to the following formula, wherein the leakage quantity of the main pipe is-60 × k, kPa/m;
if the interval meeting the measurement sensitivity leakage test condition is more than 60s, judging that the sensitivity leakage test is effective, taking the first 60 sampling points of the interval as the effective interval of the actual measurement sensitivity leakage test, marking the effective interval on a curve by using mark points at the beginning and the end of the effective interval, calculating k values of 60 air pressure values in the interval, and converting the k values into the sensitivity leakage test quantity per minute according to the following formula, wherein the sensitivity leakage quantity is-60 × k, kPa/m;
if the interval meeting the measurement stable leakage test condition is more than 60s, the stable leakage test can be judged to be effective, the first 60 sampling points of the interval are taken as the effective interval of the actual measurement stable leakage test, the starting points and the ending points are marked on a curve by mark points, k values are calculated for 60 air pressure values in the interval, the k values are converted into the stable leakage test quantity per minute according to the following formula, and the stable leakage quantity is-60 × k, kPa/m;
the brief test procedure is as follows: the simple test does not need to calculate leakage amount, as long as the air pressure value of the brake pipe can be positioned in a corresponding light band and stably kept for a period of time, and the effective characteristics of the sensitivity leakage test and the stability leakage test cannot be detected in the whole test range, the effect of the simple test can be judged, and the effective interval of the simple test is marked on a curve by using mark points at the beginning and the end;
if the air pressure value of the brake pipe can be located in the corresponding light band and the stable interval is more than 300s, and the effective characteristics of the sensitivity leakage test or the stability leakage test are detected in the whole test range, the continuous pressure holding test can be judged to be effective, the first 300 sampling points are taken as the effective measurement interval of the continuous leakage, the mark points are marked on the curve at the beginning and the end of the effective measurement interval, 60 sampling points are taken as the actual measurement interval of the actual measurement leakage, the actual measurement interval slides in the effective interval, the k value is calculated by the 60 air pressure values in the actual measurement interval in the sliding process, n-60 k values are obtained in total, the leakage per minute of the continuous pressure holding test is converted according to the following formula, and the leakage of the continuous test is-60 × max (k is equal to-60 × max)i，i＝1,2,···,n-60)，kPa/m。
In a preferred embodiment of the present invention, the overall test lasting for a certain period of time, and the brief test in step 1e are confirmed as follows:
confirmation of all experiments: if the section with the main pipe air pressure position stable duration time of more than 60s at 550 +/-20 kPa and 430 +/-20 kPa exists in the test curve, but the section with the main pipe air pressure position stable duration time of more than 300s at 500 +/-20 kPa does not exist, the test can be considered as a whole test;
confirmation of all experiments for a certain time: if sections with main pipe air pressure of 550 +/-20 kPa and 430 +/-20 kPa position stability duration time of more than 60s exist in the test curve, and sections with main pipe air pressure of 500 +/-20 kPa position stability duration time of more than 300s exist in the test curve, the test can be regarded as all tests lasting for a certain time;
3c, confirming the simplified test, if the section of the main pipe air pressure position stable duration time of more than 30s at 500 +/-20 kPa exists in the test curve, but the section of the main pipe air pressure position stable duration time of more than 60s at 550 +/-20 kPa or 430 +/-20 kPa does not exist, the test can be regarded as the simplified test.
As a preferred embodiment of the present invention, the method for determining the acceptability of the main pipe leak test, the sensitivity leak test, and the stability leak test in step 1f is as follows:
4a, judging the leakage test of the main pipe: if the air pressure of the main pipe reaches the constant pressure, the stable duration is longer than 60s, and the leakage amount is less than 20kPa/m, the leakage test of the main pipe is judged to be qualified;
judgment of sensitivity leak test: if the pressure of the main pipe reaches the constant pressure and then is reduced by 50kPa by the common brake, the stable duration is more than 60s, and the leakage amount is less than 20kPa/m, the sensitivity leakage test is judged to be qualified;
4c, judgment of stable leakage test: and if the main pipe reduces the pressure by 170kPa after the air pressure of the main pipe reaches the constant pressure, the stabilization duration is longer than 60s, and the leakage amount is smaller than 20kPa/m, the stable leakage test is judged to be qualified.
As a preferred technical scheme of the invention, the simplified test air pressure in the step 1h is divided into 3 stages according to the change time:
5a, filling air into the main pipe, wherein the air pressure reaches the constant pressure;
5b, reducing the pressure of the service brake by 100kPa, and keeping the stable duration for more than 30 s;
5c, filling air into the main pipe, wherein the air pressure reaches the constant pressure; and the 3 air pressure change stages appear in time sequence and all meet the requirements, and the simplified test is judged to be qualified.
The invention realizes the functions of real-time leakage calculation and final automatic judgment of the train brake test curve and reduces manual operation and judgment by calculating the statistical average slope of n sampling values on the air pressure curve, the first-order difference quotient at the ith air pressure value, the second-order difference quotient at the ith air pressure value, a main pipe leakage test, a sensitivity leakage test, a stable leakage test, a simple test and a continuous pressure maintaining test.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic overall flow diagram of the present invention;
FIG. 2 is one of the schematic diagrams of an embodiment of the present invention;
FIG. 3 is a schematic diagram of another embodiment of the present invention;
FIG. 4 is a schematic view of the present invention showing the effectiveness of constant pressure;
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example 1
As shown in fig. 1-4, the invention provides a method for automatically judging a train brake test curve, which comprises the following steps:
measuring leakage amount: the statistical average slope of n air pressure value sampling values (n is more than or equal to 10 and less than or equal to 60) on the air pressure curve is as follows:
The average slope rate is used for calculating leakage amount, and the influence of sampling noise on a calculation result can be reduced;
determining the first order difference quotient at the ith air pressure value:
to reduce the noise effect, a moving average of 10 samples should be performed:
determining the second order difference quotient at the ith air pressure value:
to reduce the noise effect, a moving average of 10 samples should be performed:
1d, performing a main pipe leakage test, a sensitivity leakage test, a stable leakage test, a simple test and a continuous pressure maintaining test according to the pressure maintaining leakage amount calculation and the leakage interval mark points;
1e, identifying all tests, all tests lasting for a certain time and brief tests, only one test is taken for each test, if 2 types of characteristics from 1f to 1h do not meet the requirements, judging that the test is incomplete, and confirming all the tests, confirming all the tests lasting for a certain time and confirming the brief tests;
1f, judging all tests, wherein all tests only comprise a main pipe leakage test, a sensitivity leakage test, a stable leakage test and a continuous pressure maintaining test, and totally 4 tests are carried out, wherein all tests can be judged to be qualified only when all 4 tests are qualified, and if more than 1 test of the 4 tests is not completed, all tests are judged to be incomplete;
short test integrity is judged by the air pressure of the short test.
In the step 1d, the main pipe leakage test, the sensitivity leakage test, the stable leakage test, the simple test and the continuous pressure maintaining test all need to meet the effective test conditions of the constant pressure, and the processes of the main pipe leakage test, the sensitivity leakage test, the stable leakage test, the simple test and the continuous pressure maintaining test are as follows:
the effective judgment method for the constant pressure comprises the following steps:
2a1.P0satisfies a stable condition of
Or
) Starting to maintain pressure;
2a2. if P0If the pressure is already at the position of 600 +/-20 kPa, the pressure is directly judged to be effective; otherwise, carrying out subsequent judgment processing;
2a3. from P0Begin left search Px，x＝1，2，……；
2a4. calculating dx＝(Px-P0)/x＞0(dXDiscarding less than or equal to 0);
2a5. if dx+1≥dxThe search continues; if d isx+1＜dX(dX＝dXmax), then P1＝Px；
2a6. if P1+3 position (
Or
) If P1Point to point 3 to the left (
Or
) Then P is1I is the ith air pressure value in the step, which is the starting point of air exhaust;
2a7. if P is not more than 580kPa1The constant pressure is effective when the pressure is less than or equal to 620 kPa;
and 2b, performing a leakage test on the main pipe as follows: if the leakage test condition of the measurement main pipe is satisfied (
Or
The tail is reduced by 5s) is more than 60s, the leakage test of the main pipe is judged to be effective, the first 60 sampling points of the interval are taken as the effective interval for actually measuring the leakage test of the main pipe, mark points are used for marking on a curve at the beginning and the end of the effective interval, k values are calculated for 60 air pressure values in the interval, the leakage test amount of the main pipe per minute is converted according to the following formula, and the leakage amount of the main pipe is-60 × k, kPa/m;
the sensitivity leak test procedure is as follows: if the measurement sensitivity leak test condition is satisfied (
Or
The tail is reduced by 5s) is more than 60s, the sensitivity leakage test is judged to be effective, the first 60 sampling points of the interval are taken as the effective interval of the actually measured sensitivity leakage test, the beginning and the end of the interval are marked on a curve by using mark points, k values are calculated for 60 air pressure values in the interval, the k values are converted into the sensitivity leakage test quantity per minute according to the following formula, and the sensitivity leakage quantity is-60 × k, kPa/m;
the stable leak test procedure is as follows: if the measurement stability leak test condition is satisfied: (
Or
The tail is reduced by 5s) is more than 60s, the stable leakage test can be judged to be effective, the first 60 sampling points of the interval are taken as the effective interval of the actually measured stable leakage test, mark points are used for marking on a curve at the beginning and the end of the effective interval, k values are calculated for 60 air pressure values in the interval, the k values are converted into the stable leakage test amount per minute according to the following formula, and the stable leakage amount is-60 × k, kPa/m;
the brief test procedure is as follows: the simple test does not need to calculate the leakage amount, as long as the air pressure value of the brake pipe can be positioned in the corresponding light band and is stable (
Or
The tail is reduced by 5s) for a period of time, and effective characteristics of an sensitivity leakage test and a stable leakage test (both the sensitivity leakage test and the stable leakage test are not detected in the whole test range, the validity of the simplified test can be judged, and the beginning and the end of the valid interval of the simplified test are marked on a curve by using mark points;
the dwell test procedure for a certain time was as follows: if the brake pipe air pressure value can be located in the corresponding light band and is stable (
Or
The tail is reduced by 5s), and the effective characteristics of a sensitivity leakage test or a stable leakage test (the two can be one) are detected in the whole test range, the continuous pressure-holding test can be judged to be effective, the first 300 sampling points are taken as the effective measurement intervals of the continuous leakage, the starting points and the ending points are marked on a curve, the 60 sampling points are taken as the actual measurement intervals of the actual leakage in the effective measurement intervals, the actual measurement intervals slide in the effective intervals, the k values are calculated by using the 60 air pressure values in the actual measurement intervals in the sliding process, n-60 k values are obtained in total, the leakage per minute of the continuous pressure-holding test is converted according to the following formula,
sustained test leak rate of-60 × max (k)i，i＝1,2,···,n-60)，kPa/m。
The confirmation of all tests, all tests lasting for a certain time and the brief test in step 1e is as follows:
confirmation of all experiments: if the section with the main pipe air pressure position stable duration time of more than 60s at 550 +/-20 kPa and 430 +/-20 kPa exists in the test curve, but the section with the main pipe air pressure position stable duration time of more than 300s at 500 +/-20 kPa does not exist, the test can be considered as a whole test;
confirmation of all experiments for a certain time: if sections with main pipe air pressure of 550 +/-20 kPa and 430 +/-20 kPa position stability duration time of more than 60s exist in the test curve, and sections with main pipe air pressure of 500 +/-20 kPa position stability duration time of more than 300s exist in the test curve, the test can be regarded as all tests lasting for a certain time;
3c, confirming the simplified test, if the section of the main pipe air pressure position stable duration time of more than 30s at 500 +/-20 kPa exists in the test curve, but the section of the main pipe air pressure position stable duration time of more than 60s at 550 +/-20 kPa or 430 +/-20 kPa does not exist, the test can be regarded as the simplified test.
The qualification judgment method of the main pipe leakage test, the sensitivity leakage test and the stability leakage test in the step 1f is as follows:
4a, judging the leakage test of the main pipe: if the air pressure of the main pipe reaches a constant pressure (600 +/-20 kPa), the stabilization duration is longer than 60s, and the leakage amount is less than 20kPa/m, the leakage test of the main pipe is judged to be qualified;
judgment of sensitivity leak test: if the main pipe reduces the pressure by 50kPa (550 +/-20 kPa) after the air pressure of the main pipe reaches the constant pressure (600 +/-20 kPa), the stable duration is longer than 60s, the leakage is less than 20kPa/m, the sensitivity leakage test is judged to be qualified,
4c, judgment of stable leakage test: and if the service brake pressure is reduced by 170kPa (430 +/-20 kPa) after the main pipe air pressure reaches the constant pressure (600 +/-20 kPa), the stable duration is longer than 60s, and the leakage amount is less than 20kPa/m, judging that the stable leakage test is qualified.
In the step 1h, the brief test air pressure is divided into 3 air pressure change stages according to the change time:
5a, filling air into the main pipe, wherein the air pressure reaches the constant pressure (600 +/-20 kPa);
service brake decompression is 100kPa (500 +/-20 kPa), and the stabilization duration is more than 30 s;
5c, filling air into the main pipe, wherein the air pressure reaches the constant pressure (600 +/-20 kPa); and the 3 air pressure change stages appear in time sequence and all meet the requirements, and the simplified test is judged to be qualified.
Specifically, the statistical average slope of n sampling values (n is more than or equal to 10 and less than or equal to 60) on the air pressure curve is calculated, the first-order difference quotient at the ith air pressure value and the second-order difference quotient at the ith air pressure value are calculated, then the main pipe leakage test, the sensitivity leakage test, the stable leakage test, the simple test and the continuous pressure maintaining test are carried out under the condition of effective constant pressure, the functions of real-time leakage calculation and final automatic judgment of the train brake test curve are realized by judging the integrality and the qualification of the tests, and the manual operation and judgment are reduced.
The invention realizes the real-time leakage calculation and final automatic judgment functions of the train brake test curve and reduces manual operation and judgment by calculating the statistical average slope of n air pressure value sampling values (n is more than or equal to 10 and less than or equal to 60) on the air pressure curve, the first-order difference quotient at the ith air pressure value, the second-order difference quotient at the ith air pressure value, a main pipe leakage test, a sensitivity leakage test, a stable leakage test, a simple test and a continuous pressure maintaining test.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A train brake test curve automatic judgment method is characterized by comprising the following steps:
measuring leakage amount: statistical average slope of n pressure value sampling values on the pressure curve:
determining the first order difference quotient at the ith air pressure value:
to reduceLess noise influence, should do the moving average processing of 10 sampling points:
determining the second order difference quotient at the ith air pressure value:
to reduce the noise effect, a moving average of 10 samples is performed:
1d, performing a main pipe leakage test, a sensitivity leakage test, a stable leakage test, a simple test and a continuous pressure maintaining test according to the pressure maintaining leakage amount calculation and the leakage interval mark points;
1e, identifying all tests, all tests lasting for a certain time and brief tests, only one test is taken for each test, if 2 types of characteristics from 1f to 1h do not meet the requirements, judging that the test is incomplete, and confirming all the tests, confirming all the tests lasting for a certain time and confirming the brief tests;
1f, judging all tests, wherein all tests only comprise a main pipe leakage test, a sensitivity leakage test, a stable leakage test and a continuous pressure maintaining test, and totally 4 tests are carried out, wherein all tests can be judged to be qualified only when all 4 tests are qualified, and if more than 1 test of the 4 tests is not completed, all tests are judged to be incomplete;
short test integrity is judged by the air pressure of the short test.
2. The method for automatically judging the test curve of the train brake as claimed in claim 1, wherein the main pipe leakage test, the sensitivity leakage test, the stable leakage test, the simplified test and the continuous pressure maintaining test in step 1d all need to satisfy the test conditions effective at constant pressure, and the processes of the main pipe leakage test, the sensitivity leakage test, the stable leakage test, the simplified test and the continuous pressure maintaining test are respectively as follows:
the method for effectively judging the constant pressure comprises the following steps:
2a1.P0meets the stable condition
Or
Pressure maintaining is started;
2a2. if P0If the pressure is already at the position of 600 +/-20 kPa, the pressure is directly judged to be effective; otherwise, carrying out subsequent judgment processing;
2a3. from P0Begin left search Px，x＝1，2，……；
2a4. calculating dx＝(Px-P0)/x＞0；
2a5. if dx+1≥dXThe search continues; if d isx+1＜dXThen P is1＝Px；
2a6. if P1+3 position
Or
Then P is1Is the starting point of air exhaust;
2a7. if P is not more than 580kPa1The constant pressure is effective when the pressure is less than or equal to 620 kPa;
if the interval meeting the leakage test condition of the main pipe is more than 60s, judging that the leakage test of the main pipe is effective, taking the first 60 sampling points of the interval as the effective interval of the actual leakage test of the main pipe, marking the effective interval on a curve by using mark points at the beginning and the end of the effective interval, calculating k values of 60 air pressure values in the interval, and converting the k values into the leakage test quantity of the main pipe per minute according to the following formula, wherein the leakage quantity of the main pipe is-60 × k, kPa/m;
if the interval meeting the measurement sensitivity leakage test condition is more than 60s, judging that the sensitivity leakage test is effective, taking the first 60 sampling points of the interval as the effective interval of the actual measurement sensitivity leakage test, marking the effective interval on a curve by using mark points at the beginning and the end of the effective interval, calculating k values of 60 air pressure values in the interval, and converting the k values into the sensitivity leakage test quantity per minute according to the following formula, wherein the sensitivity leakage quantity is-60 × k, kPa/m;
if the interval meeting the measurement stable leakage test condition is more than 60s, the stable leakage test can be judged to be effective, the first 60 sampling points of the interval are taken as the effective interval of the actual measurement stable leakage test, the starting points and the ending points are marked on a curve by mark points, k values are calculated for 60 air pressure values in the interval, the k values are converted into the stable leakage test quantity per minute according to the following formula, and the stable leakage quantity is-60 × k, kPa/m;
the brief test procedure is as follows: the simple test does not need to calculate leakage amount, as long as the air pressure value of the brake pipe can be positioned in a corresponding light band and stably kept for a period of time, and the effective characteristics of the sensitivity leakage test and the stability leakage test cannot be detected in the whole test range, the effect of the simple test can be judged, and the effective interval of the simple test is marked on a curve by using mark points at the beginning and the end;
if the air pressure value of the brake pipe can be located in the corresponding light band and the stable interval is more than 300s, and the effective characteristics of the sensitivity leakage test or the stability leakage test are detected in the whole test range, the continuous pressure holding test can be judged to be effective, the first 300 sampling points are taken as the effective measurement interval of the continuous leakage, the mark points are marked on the curve at the beginning and the end of the effective measurement interval, 60 sampling points are taken as the actual measurement interval of the actual measurement leakage, the actual measurement interval slides in the effective interval, the k value is calculated by the 60 air pressure values in the actual measurement interval in the sliding process, n-60 k values are obtained in total, the leakage per minute of the continuous pressure holding test is converted according to the following formula, and the leakage of the continuous test is-60 × max (k is equal to-60 × max)i，i＝1,2,…,n-60)，kPa/m。
3. The method for automatically determining a train brake test curve according to claim 1, wherein the confirmation of the total test, the total test lasting for a certain time and the brief test in step 1e is as follows:
confirmation of all experiments: if the section with the main pipe air pressure position stable duration time of more than 60s at 550 +/-20 kPa and 430 +/-20 kPa exists in the test curve, but the section with the main pipe air pressure position stable duration time of more than 300s at 500 +/-20 kPa does not exist, the test can be considered as a whole test;
confirmation of all experiments for a certain time: if sections with main pipe air pressure of 550 +/-20 kPa and 430 +/-20 kPa position stability duration time of more than 60s exist in the test curve, and sections with main pipe air pressure of 500 +/-20 kPa position stability duration time of more than 300s exist in the test curve, the test can be regarded as all tests lasting for a certain time;
3c, confirming the simplified test, if the section of the main pipe air pressure position stable duration time of more than 30s at 500 +/-20 kPa exists in the test curve, but the section of the main pipe air pressure position stable duration time of more than 60s at 550 +/-20 kPa or 430 +/-20 kPa does not exist, the test can be regarded as the simplified test.
4. The method for automatically judging the train brake test curve according to claim 1, wherein the method for judging the qualification of the main pipe leakage test, the sensitivity leakage test and the stability leakage test in the step 1f is as follows:
4a, judging the leakage test of the main pipe: if the air pressure of the main pipe reaches the constant pressure, the stable duration is longer than 60s, and the leakage amount is less than 20kPa/m, the leakage test of the main pipe is judged to be qualified;
judgment of sensitivity leak test: if the pressure of the main pipe reaches the constant pressure and then is reduced by 50kPa by the common brake, the stable duration is more than 60s, and the leakage amount is less than 20kPa/m, the sensitivity leakage test is judged to be qualified;
4c, judgment of stable leakage test: and if the main pipe reduces the pressure by 170kPa after the air pressure of the main pipe reaches the constant pressure, the stabilization duration is longer than 60s, and the leakage amount is smaller than 20kPa/m, the stable leakage test is judged to be qualified.
5. The method for automatically judging the train brake test curve according to claim 1, wherein the simplified test air pressure in the step 1h is divided into 3 air pressure change stages according to change time:
5a, filling air into the main pipe, wherein the air pressure reaches the constant pressure;
5b, reducing the pressure of the service brake by 100kPa, and keeping the stable duration for more than 30 s;
5c, filling air into the main pipe, wherein the air pressure reaches the constant pressure; and the 3 air pressure change stages appear in time sequence and all meet the requirements, and the simplified test is judged to be qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710941816.8A CN107741328B (en) | 2018-01-11 | 2018-01-11 | Automatic determination method for train brake test curve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710941816.8A CN107741328B (en) | 2018-01-11 | 2018-01-11 | Automatic determination method for train brake test curve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107741328A CN107741328A (en) | 2018-02-27 |
| CN107741328B true CN107741328B (en) | 2020-08-07 |
Family
ID=61237226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710941816.8A Active CN107741328B (en) | 2018-01-11 | 2018-01-11 | Automatic determination method for train brake test curve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107741328B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285986A (en) * | 2019-06-21 | 2019-09-27 | 中国神华能源股份有限公司 | Vehicle-mounted brake-cylinder pressure detection method, system and vehicle detecting system |
| CN112298267B (en) * | 2020-09-30 | 2022-05-24 | 眉山中车制动科技股份有限公司 | Method for preventing vehicle from contracting brake when cargo train is converted from 600kPa constant pressure to 500kPa constant pressure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100374A (en) * | 1994-06-10 | 1995-03-22 | 王庭义 | Controlling system and method for braking apparatus of vehical |
| CN101607559A (en) * | 2009-06-18 | 2009-12-23 | 株洲南车时代电气股份有限公司 | A kind of method of searching train traction calculation operation curve and device |
| CN102681561A (en) * | 2011-03-17 | 2012-09-19 | 上海全路通铁道科技发展有限公司 | Device and method for real-time control of train pipe volume pressure |
| CN205785775U (en) * | 2016-05-23 | 2016-12-07 | 中国测试技术研究院电子研究所 | Car Relay Valve performance automatic checkout system |
-
2018
- 2018-01-11 CN CN201710941816.8A patent/CN107741328B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100374A (en) * | 1994-06-10 | 1995-03-22 | 王庭义 | Controlling system and method for braking apparatus of vehical |
| CN101607559A (en) * | 2009-06-18 | 2009-12-23 | 株洲南车时代电气股份有限公司 | A kind of method of searching train traction calculation operation curve and device |
| CN102681561A (en) * | 2011-03-17 | 2012-09-19 | 上海全路通铁道科技发展有限公司 | Device and method for real-time control of train pipe volume pressure |
| CN205785775U (en) * | 2016-05-23 | 2016-12-07 | 中国测试技术研究院电子研究所 | Car Relay Valve performance automatic checkout system |
Non-Patent Citations (1)
| Title |
|---|
| Determination of air brake adjustment from air;L.D.Kandt 等;《Institution of Mechanical Engineers》;20011231;第215卷(第1期);第21-29页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107741328A (en) | 2018-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107741328B (en) | Automatic determination method for train brake test curve | |
| CN109229082B (en) | A kind of rail vehicle braking system anti-skid control method | |
| JP6636044B2 (en) | Leak inspection apparatus and method | |
| CN204165699U (en) | A kind of pressure sensor calibrating apparatus | |
| CN102454457A (en) | Method for adapting a lean nox trap in an exhaust system of a motor vehicle | |
| EP3392107A3 (en) | Brake health indicator systems using input and output energy | |
| CN112124277B (en) | Rail vehicle brake cylinder pressure control method and device and rail vehicle | |
| CN101655406A (en) | Method and device for zero point calibration of gas pressure sensor | |
| CN104029688B (en) | A kind of wheel pair idling detection method | |
| CN110949342B (en) | Air braking parking control method and system for railway vehicle | |
| CN109470196B (en) | Model-based aircraft engine blade profile data evaluation method | |
| CN204903498U (en) | Hand -held type sulfur hexafluoride humidity measuring instrument's multichannel calibrating device | |
| CN103499371A (en) | Method for measuring flow of air leaked into condenser and vacuum system | |
| CN201748890U (en) | Inner diameter measurement check tool of rubber tube | |
| EP1130247A3 (en) | Onboard Diagnostics for vehicle fuel system | |
| MX2021014507A (en) | Brake equipment wear monitoring for remaining useful life. | |
| CN104897480A (en) | Method for evaluating bending mechanical properties of unequal-wall-thickness metal tube | |
| WO2016151955A1 (en) | Method for estimating initial creep strength of heat-resistant member, and method for assessing remaining service life thereof | |
| DE102008061456B3 (en) | Method for determining the speed of a vehicle during a braking operation | |
| JP2013104418A (en) | Pumping brake detecting control device and method for internal combustion engine | |
| JP2006159224A (en) | Necking method of round metallic tube | |
| MX2017001488A (en) | Device for filling vehicle air conditioning systems with coolant r744. | |
| CN110500202A (en) | A kind of method of Automatic-searching solid propellant rocket fire end time | |
| RU2422308C1 (en) | Method for charging and testing brakes of railway rolling stock | |
| CN204043998U (en) | A kind of automatic negative-pressure test system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |