CN102627105A - Method and device for detecting brake pressure state of train vehicle - Google Patents
Method and device for detecting brake pressure state of train vehicle Download PDFInfo
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- CN102627105A CN102627105A CN2012101098614A CN201210109861A CN102627105A CN 102627105 A CN102627105 A CN 102627105A CN 2012101098614 A CN2012101098614 A CN 2012101098614A CN 201210109861 A CN201210109861 A CN 201210109861A CN 102627105 A CN102627105 A CN 102627105A
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Abstract
The invention relates to a method for detecting the brake pressure state of a train vehicle, which comprises the following steps of: obtaining and storing the current pressure value inside a brake cylinder; obtaining the current pressure voltage inside the brake cylinder after delaying for a first set time period; calculating the two pressure values to obtain the current pressure change rate of the brake cylinder; obtaining the pressure state of the brake cylinder through the current pressure change rate, and comparing the obtained pressure state with the former pressure state of the brake cylinder; if the two pressure states are the same, storing the pressure state of the brake cylinder, and discarding the obtained current pressure value; and if not, executing the step of storing the pressure state of the brake cylinder and storing the obtained current pressure value. The invention also relates to a device for realizing the method. With the method and device for detecting the brake pressure state of a train vehicle provided by the invention, the pressure state inside the brake cylinder can be obtained in real time, and the efficiency is high.
Description
Technical field
The present invention relates to rail vehicle, more particularly, relate to a kind of rail vehicle brake-pressure status detection method and device.
Background technology
The effect of the brake equipment of rail vehicle plays an important role to the railway transportation modernization development.Along with the speed-raising of railway and the continuous development of railway information construction, the train after the speed-raising has proposed exacting requirements more to the stability and the reliability of brake system.As the part of rail vehicle air damper, brake cylinder is the parts that compressed-air actuated pressure converted into mechanical thrust.The rail vehicle glancing impact, through the effect of triple valve or distributing valve, brake cylinder is accepted the pressurized air that auxiliary reservoir is sent here, and the brake cylinder piston is outwards released, and makes brake shoe compress wheel, produces brake action; During alleviation, the pressurized air in the brake cylinder is arranged to atmosphere through triple valve or distributing valve, and the brake cylinder release spring makes the brake cylinder piston reset, and foundation brake rigging also resets thereupon, so brake shoe leaves wheel, realizes mitigation.At present the detection to the car brakeing machine of marshaling mainly contains two kinds of test methods in the China railways vehicle utilization work: locomotive blast examination wind, interview wind apparatus examination wind.These two kinds of test methods all belong to the Static Detection mode, qualitative analysis the technical performance of brake system of permutation car.And the inspection of the brake equipment of each car is mainly still undertaken by manual work.The brake device of each car is checked through means such as listening, strike, see, touch that handle what the brake fault of inspection discovery can in time be handled, the as prescribed that can't in time handle is closed cut out cock or the processing of uncoupling by the vehicle train-examiner; The validity of this detection mode depends on technical merit, sense of responsibility and the mode of operation of station inspector, and the quality of detection is difficult to the long-term high level that keeps.And above-mentioned detection all belongs to static fixed point, regularly detects, and the brake system that can only reflect particular moment is the performance situation roughly, and is not accurate enough and comprehensive, more can't accomplish real-time grasp for each car brake system changes of properties in the train travelling process.Some accidents that train produces in operational process have not reproducibility.
Summary of the invention
The technical matters that the present invention will solve is; Can only reflect the brake system situation, the brake system situation in the time of can not detecting train operation of particular moment, the defective that efficient is lower to prior art above-mentioned, provide a kind of and can when train operation, detect brake system situation, higher a kind of rail vehicle brake-pressure status detection method and the device of efficient in real time.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of rail vehicle brake-pressure status detection method, comprise the steps:
A) the current pressure value that obtains in the brake cylinder is also stored; After postponing first setting-up time, obtain the current pressure value in the said brake cylinder once more;
B) force value that obtains for twice of the above-mentioned priority of computing obtains said brake cylinder current pressure rate of change;
C) obtain the pressure state of said brake cylinder through said current pressure interconversion rate, and with said brake cylinder before pressure state relatively; As identical, execution in step D); Otherwise, execution in step E);
D) preserve said brake-cylinder pressure state, abandon the current pressure value that obtains and return steps A);
E) preserve said brake-cylinder pressure state, the current pressure value that preservation obtains is also returned steps A).
In rail vehicle brake-pressure status detection method of the present invention, said step C) further comprise in:
C1) whether judge said current pressure rate of change more than or equal to first setting value, in this way, said brake cylinder state is for rising; Otherwise, execution in step C2);
C2) judge said current pressure rate of change whether less than first setting value greater than second setting value, in this way, said brake-cylinder pressure state is steady; Otherwise, execution in step C3;
C3) whether judge said current pressure rate of change less than second setting value, in this way, said brake-cylinder pressure state is for descending.
In rail vehicle brake-pressure status detection method of the present invention, when judging that said brake-cylinder pressure state is steady, said method also comprises the steps:
F1) the current pressure value that obtains in the brake cylinder is also stored; After postponing second setting-up time, obtain the current pressure value in the said brake cylinder once more;
F2) force value that obtains for twice of the above-mentioned priority of computing obtains said brake cylinder current pressure rate of change;
Whether the change value of pressure of F3) relatively working as front brake cylinder in this way, is kept at step F 1 greater than the 3rd setting value) the middle brake cylinder current pressure value that writes down; Otherwise, abandon said step F 1) and the middle brake cylinder current pressure value that writes down.
In rail vehicle brake-pressure status detection method of the present invention, said step e) further comprise:
E1) with said current pressure value and the time value of gathering this current force value according to the RFID tag format packing of setting;
E2) send said data packet through the RFID label.
In rail vehicle brake-pressure status detection method of the present invention, said steps A) force value in obtains through the pressure sensor that is installed in said brake cylinder cylinder mouth.
In rail vehicle brake-pressure status detection method of the present invention, the pressure value difference of said change value of pressure through twice collection got divided by the time difference of said twice collection.
The invention still further relates to a kind of device of realizing said method, comprising:
The current pressure value obtains the unit: be used to obtain current pressure value and storage in the brake cylinder; And behind setting-up time, obtain the current pressure value in the said brake cylinder once more;
The current pressure rate of change is obtained the unit: be used for the force value that the above-mentioned priority of computing obtains for twice and obtain said brake cylinder current pressure rate of change;
Current pressure state judging unit: be used for obtaining the pressure state of said brake cylinder through said current pressure interconversion rate, and with said brake cylinder before pressure state relatively, obtain the current pressure state;
Pressure state is preserved and the pressure record unit: be used to preserve said brake-cylinder pressure state, abandon or current pressure value that preservation obtains.
In device of the present invention, said current pressure state judging unit further comprises:
The first setting value comparison module: whether be used to judge said current pressure rate of change greater than first setting value, in this way, said brake cylinder state is for rising;
The second setting value comparison module: be used to judge said current pressure rate of change whether less than first setting value greater than second setting value, in this way, said brake-cylinder pressure state is steady; If the current pressure rate of change is smaller or equal to second setting value, said brake-cylinder pressure state is for descending.
In device of the present invention, also comprise:
The 3rd setting value comparison module: the pressure state that is used for its pressure cylinder of comparison be judged as pulsation-free when the pressure change rate of front brake cylinder whether greater than the 3rd setting value.
In device of the present invention, said pressure state is preserved and the pressure record unit also further comprises:
Data packetization module: be used for said current pressure value and the time value of gathering this current force value according to the RFID tag format packing of setting;
Data transmission blocks: be used for the RFID label and send said data packet.
The rail vehicle brake-pressure status detection method and the device of embodiment of the present invention; Has following beneficial effect: owing to automatically, constantly compare the pressure state in the rail vehicle brake cylinder of in the unit time of setting, obtaining; When its pressure state changes, current force value that obtains and acquisition time thereof are stored and sent according to setting, be convenient to follow-up treatment step; So, no matter train still stops in operation, can obtain the pressure condition in its brake cylinder in real time, also just obtained the situation of train brake system; Simultaneously, when conversion not occurring, do not gather above-mentioned pressure condition or the transmission pressure data, so with regard to total system, its efficient is higher.
Description of drawings
Fig. 1 is a method of inspection diagram of circuit among rail vehicle brake-pressure status detection method of the present invention and the device embodiment;
Fig. 2 is a pressure state decision flow chart among the said embodiment;
Fig. 3 is to its diagram of circuit of further judging when pressure state is constant among the said embodiment;
Fig. 4 is the structural representation that installs among the said embodiment.
The specific embodiment
To combine accompanying drawing that the embodiment of the invention is described further below.
As shown in Figure 1, in rail vehicle brake-pressure status detection method of the present invention and device embodiment, its method of inspection comprises the steps:
Step S11 is in setting-up time; Successively obtain brake-cylinder pressure value and storage for twice: usually; Train braking system comprises: parts such as air compressor, total reservoir, brake pipe, brake cylinder, auxiliary reservoir, triple valve; Brake cylinder is converted into mechanical thrust with air pressure, thereby realizes braking.Pressure in the evidence, brake cylinder changes each item brake operating that can reflect lorry, promptly can reflect the state of motor vehicle braking system indirectly through force value in the brake cylinder and variation thereof; No matter be problems such as mechanical breakdown or physical damage, can directly reflect,, can realize collection the braking cylinder pressure data through setting pressure monitoring device in brake cylinder test port position by brake-cylinder pressure value and change curve thereof.Whether send the data to the pressure data analytical equipment then and carry out analyzing and processing, it is normal to judge current brake system.So for the brake system of rail vehicle, most of the time, its braking potential directly and pressure correlation in the brake cylinder in the brake system.That is to say that the pressure state on the brake cylinder on the rail vehicle has been represented the state of its braking potential or brake system to a great extent.In the present embodiment, the brake system state that detects rail vehicle through pressure state in the detection brake cylinder and force value.In order to judge the pressure state in the rail vehicle brake cylinder, at first need obtain the pressure state in this pressure cylinder, in this step,, successively obtain the force value of brake cylinder for twice and store this two force value that obtain through postponing first setting-up time.Specifically, obtain the force value and the storage of once working as front brake cylinder earlier, after postponing first setting-up time of setting, obtain the also storage of current pressure value of this brake cylinder once more then.For system, these two force value are different (even its numerical value is just the same), separate storage certainly; For example, can be with called after first force value that obtains for the first time, called after second force value that obtains for the second time, and separate storage.In the present embodiment; The force value of above-mentioned brake cylinder is through being installed in (this pressure sensor obtain be the force value in the brake cylinder) that the brake cylinder outside is obtained near the pressure sensor of this brake cylinder cylinder mouth position; This pressure sensor is connected with a RFID label; Pressure sensor is transferred to above-mentioned RFID label after obtaining force value, through the RFID tag transmits in system.This system can be arranged on the rail vehicle, also can be arranged on the roadside of above-mentioned rail vehicle process; Can be one on each vehicle, also can be shared one of a plurality of vehicles.Why above-mentioned pressure sensor is arranged on above-mentioned brake cylinder cylinder mouth position, is because the force value that on this position, obtains can reflect brake cylinder single-piece pressure condition comparatively exactly.
Step S12 uses above-mentioned force value computing to obtain pressure change rate: in this step; After above-mentioned two the force value of certain hour obtains at interval; Through to these two pressure relatively reach calculating, obtain the pressure change rate in this brake cylinder in this pitch time.In the present embodiment,, again difference that obtains and above-mentioned time gap are divided by, just obtain the pressure change rate of this brake cylinder on this period through above-mentioned two force value are subtracted each other.
Step S13 obtains the current pressure state according to above-mentioned pressure change rate: in this step, through the pressure change rate that obtains in the above-mentioned steps, obtain the pressure state when front brake cylinder.In the present embodiment, above-mentioned pressure state comprises: rise, stablize and three states that descend; Wherein, rise the expression brake cylinder just in pressure boost; The pressure of stably expressed brake cylinder changes little; And the pressure that is illustrated in brake cylinder that descends descends.Under these three kinds of situation; It should be noted that this state that descends; If rail vehicle is not just in time to be in braking state; The state mal that this just representes brake cylinder has gas leakage or other situation and makes air pressure reduce, and the brake cylinder of the air pressure of a reduction maybe be when brake can not regular event or can not move effectively.As for how to obtain the current pressure state, more detailed description is arranged after a while according to pressure change rate.
Do step S14 current pressure state and pressure state before change? In this way, execution in step S15, otherwise, execution in step S16; In this step, the pressure variable condition of this brake cylinder that will in step S13, obtain and its before the pressure state that stores relatively, if these two states are identical, just jump to step S16; If these two states are inequality, just carry out next step S15.What deserves to be mentioned is, if system just starts working, the pressure state before not having so; The storage area of pressure state is blank before the storage, and like this, the pressure state that obtains in the above-mentioned steps obviously can not be blank value; So in this case, system can execution in step S15.
The brake cylinder current pressure value that step S15 preserves pressure state and obtains: in this step; Preserving the above-mentioned pressure state of obtaining with this pressure state (in fact is exactly; In the present embodiment; Be the code or the coding of expression pressure state) be stored on the storage location of setting, this storage location is specifically designed to the storage pressure state; Pressure state before in step S14, being put down in writing; Also be to read away and in the pressure state that obtained at that time relatively by this position; When system starts working, this storage location will be initialised, and in system works constitutes; The pressure state that this position was constantly obtained at that time covers, to preserve current brake-cylinder pressure state.And for current brake-cylinder pressure value, storage is an above-mentioned back force value that obtains usually, also will be transferred in the follow-up treatment facility after this force value is stored and go.In the present embodiment, the current pressure value of storage and the time value of gathering this current force value are sent above-mentioned data packet according to the RFID tag format packing of setting and through the RFID label.In addition, in the present embodiment, after this step is accomplished, return step S11, carry out brake-cylinder pressure condition monitoring next time, circulation so constantly, make the brake system of rail vehicle can be in time when going wrong, automatically come to light.
Step S16 preserves pressure state, abandons the brake cylinder current pressure value that obtains: in this step, only preserve the pressure state of above-mentioned brake cylinder, and abandon the current brake-cylinder pressure value that obtains, and return step S11, begin next on-cycle monitoring.In the present embodiment, above-mentioned steps S15, the state of expression brake cylinder changes, and need barometric information and time parameter be sent to back level device processes, record, to remind the staff to note or to be that fault inquiry provides the basis; And step S16 representes that the state of brake cylinder does not change, and does not need record data; In one-time detection, above-mentioned steps S15 and step S16 only can occur one.
Wherein, see also Fig. 2, in above-mentioned steps, the step of the pressure state of judgement brake cylinder is by comprising the steps:
Is step S21 pressure change rate greater than first setting value? In this way, jump to step S24; Otherwise, execution in step S22;
Is step S22 pressure change rate less than first setting value and greater than second setting value? In this way, jump to step S25; Otherwise, execution in step S23;
Is step S23 pressure change rate less than or equal to second setting value? In this way, execution in step S26;
Step S24 judges that pressure state is for rising: in this step, the pressure state of judging this brake cylinder is for rising;
Step S25 judges that pressure state is for stable: in this step, the pressure state of judging this brake cylinder is for stable;
Step S26 judges that pressure state is for descending: in this step, the pressure state of judging this brake cylinder is for descending;
In the present embodiment; For a rail vehicle brake cylinder; In one-time detection, a kind of in above-mentioned three kinds of situation can only appear, that is to say; When the pressure change rate of obtaining a brake cylinder, the represented brake-cylinder pressure state of this pressure change rate be and can only be rise, stable or descend in a kind of.First setting value recited above and second setting value are respectively to set propradation critical value and decline state critical value in advance.When the pressure change rate of a brake cylinder during more than or equal to above-mentioned propradation critical value, the atmospheric pressure state of this brake cylinder is for rising; When the pressure change rate of a brake cylinder during less than above-mentioned propradation critical value but greater than above-mentioned decline state critical value, the atmospheric pressure state of this brake cylinder is for stable; When the pressure change rate of a brake cylinder during smaller or equal to above-mentioned decline state critical value, the atmospheric pressure state of this brake cylinder is for descending.
In the present embodiment, also possibly comprise a kind of comparatively special situation, promptly the slowly situation of gas leakage appears in train braking cylinder.At this moment, detected air pressure bigger difference can not occur in first setting-up time, and this possibly be mistaken for air pressure is stable., after judging stable gas pressure, also should detect in second setting-up time, whether this atmospheric pressure value rate of change is greater than the 3rd setting value for this reason.When if the situation of slowly gas leakage appears in brake cylinder, final, the atmospheric pressure value rate of change in the brake cylinder can be greater than the 3rd setting value.As shown in Figure 3, this step comprises the steps:
Step S31 obtains current brake-cylinder pressure rate of change: in this step; Owing to judged that the atmospheric pressure state of brake cylinder is stable; But; Owing to do not know whether to exist the situation of slow gas leakage, therefore need carry out one and replenish judgement its atmospheric pressure value rate of change, the atmospheric pressure value rate of change that guarantees brake cylinder is in the scope of an approval; If its atmospheric pressure value rate of change during greater than the rate of change set, should think slow gas leakage situation to occur, will write down the current pressure value and it will be sent, be convenient to the processing of subsequent step or prompting staff's attention.So, in this step, take out the current brake-cylinder pressure value that in this detects, obtains; And after postponing second setting-up time,, it is subtracted each other in the inferior force value that obtains when front brake cylinder; And remove and second delay time, obtain current brake-cylinder pressure rate of change.What deserves to be mentioned is that in the present embodiment, above-mentioned second delay time can be identical with first delay time, also can be different; That is to say that the pressure change rate of above-mentioned brake cylinder can be directly by obtaining in the fwd step; Also can in this step, obtain again.Again the benefit that obtains this rate of change is the ageing stronger of its data, judges to approximate to the facts more.
This pressure of step S32 less than the 3rd setting value? In this way, execution in step S33; Otherwise, jump to step S34; In this step, above-mentioned the 3rd setting value is to set, can keep the threshold values of the brake-cylinder pressure rate of change of brake system normal operation in advance; When current brake-cylinder pressure rate of change is worth more than or equal to this, is judged to and does not have slow gas leakage situation, execution in step S34; When the current pressure value is worth less than this, be judged to the slow gas leakage situation of appearance, execution in step S33.
Step S33 stores above-mentioned current pressure value: in this step, store above-mentioned current pressure value, and the method that this force value and acquisition time thereof are sent according to data among the above-mentioned steps S15 is with its packing and transmission.
Step S34 abandons the current pressure value: in this step, abandon the current pressure value, and prepare to carry out next on-cycle and detect.
In to train braking cylinder pressure acquisition process; Pressure acquisition is intensive more to restore pressure history more really; But it is big more to gather the intensive more data quantity stored that then needs; Need data quantity transmitted also big more, so the benefit of present embodiment rail vehicle brake-cylinder pressure monitoring is to pass through minimum number pressure strong point, comes the comparatively complete variation of expressing the brake cylinder internal pressure.
In the present embodiment; Also relate to a kind of device of realizing said method; The structural representation of this device is as shown in Figure 4, and this device comprises: the current pressure value obtains unit 41, the current pressure rate of change is obtained unit 42, current pressure state judging unit 43, pressure state preservation and pressure record unit 44 and the 3rd setting value comparison module 45; Wherein, the current pressure value obtains unit 41 and is used to obtain current pressure value and storage in the brake cylinder; And behind setting-up time, obtain the current pressure value in the said brake cylinder once more; The current pressure rate of change is obtained unit 42 and is used for the force value that the above-mentioned priority of computing obtains for twice and obtains said brake cylinder current pressure rate of change; Current pressure state judging unit 43 is used for obtaining through said current pressure interconversion rate the pressure state of said brake cylinder, and with said brake cylinder before pressure state relatively, obtain the current pressure state; Pressure state is preserved and pressure record unit 44 is used to preserve said brake-cylinder pressure state, abandons or current pressure value that preservation obtains; The pressure state that the 3rd setting value comparison module 45 is used for its pressure cylinder of comparison be judged as pulsation-free when the pressure change rate value of front brake cylinder whether greater than the 3rd setting value.
In the present embodiment, current pressure state judging unit 43 further comprises: the first setting value comparison module 431, and whether it is used to judge said current pressure rate of change greater than first setting value, in this way, judges that then the brake cylinder state is for rising; The second setting value comparison module 432, whether it is used to judge said current pressure rate of change less than first setting value and greater than second setting value, in this way, judges that then the brake-cylinder pressure state is for steady; Simultaneously, the second setting value comparison module 432 is used to also judge whether said current pressure rate of change is less than or equal to second setting value, in this way, judges that then the brake-cylinder pressure state is for descending.
And pressure state is preserved and pressure record unit 44 also further comprises: data packetization module 441 is used for said current pressure value and the time value of gathering this current force value according to the RFID tag format packing of setting; Data transmission blocks 442 is used for the RFID label and sends said data packet.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.
Claims (10)
1. a rail vehicle brake-pressure status detection method is characterized in that, comprises the steps:
A) the current pressure value that obtains in the brake cylinder is also stored; After postponing first setting-up time, obtain the current pressure value in the said brake cylinder once more;
B) force value that obtains for twice of the above-mentioned priority of computing obtains said brake cylinder current pressure rate of change;
C) obtain the pressure state of said brake cylinder through said current pressure rate of change, and with said brake cylinder before pressure state relatively; As identical, execution in step D); Otherwise, execution in step E);
D) preserve said brake-cylinder pressure state, abandon the current pressure value that obtains and return steps A);
E) preserve said brake-cylinder pressure state, the current pressure value that preservation obtains is also returned steps A).
2. rail vehicle brake-pressure status detection method according to claim 1 is characterized in that said step C) in further comprise:
C1) whether judge said current pressure rate of change more than or equal to first setting value, in this way, said brake cylinder state is for rising; Otherwise, execution in step C2);
C2) judge said current pressure rate of change whether less than first setting value greater than second setting value, in this way, said brake-cylinder pressure state is steady; Otherwise, execution in step C3;
C3) whether judge said current pressure rate of change less than second setting value, in this way, said brake-cylinder pressure state is for descending.
3. rail vehicle brake-pressure status detection method according to claim 2 is characterized in that, when judging that said brake-cylinder pressure state is steady, said method also comprises the steps:
F1) the current pressure value that obtains in the brake cylinder is also stored; After postponing second setting-up time, obtain the current pressure value in the said brake cylinder once more;
F2) force value that obtains for twice of the above-mentioned priority of computing obtains said brake cylinder current pressure rate of change;
Whether the change value of pressure of F3) relatively working as front brake cylinder in this way, is kept at step F 1 greater than the 3rd setting value) the middle brake cylinder current pressure value that writes down; Otherwise, abandon said step F 1) and the middle brake cylinder current pressure value that writes down.
4. rail vehicle brake-pressure status detection method according to claim 3 is characterized in that said step e) further comprise:
E1) with said brake cylinder current pressure value and the time value of gathering this current force value according to the RFID tag format packing of setting;
E2) send said data packet through the RFID label.
5. rail vehicle brake-pressure status detection method according to claim 4 is characterized in that said steps A) in force value obtain through the pressure sensor that is installed in said brake cylinder cylinder mouth.
6. rail vehicle brake-pressure status detection method according to claim 5 is characterized in that, the pressure value difference of said change value of pressure through twice collection got divided by the time difference of said twice collection.
7. a device of realizing the said method of inspection of claim 1 is characterized in that, comprising:
The current pressure value obtains the unit: be used to obtain current pressure value and storage in the brake cylinder; And behind setting-up time, obtain the current pressure value in the said brake cylinder once more;
The current pressure rate of change is obtained the unit: be used for the force value that the above-mentioned priority of computing obtains for twice and obtain said brake cylinder current pressure rate of change;
Current pressure state judging unit: be used for obtaining the pressure state of said brake cylinder through said current pressure interconversion rate, and with said brake cylinder before pressure state relatively, obtain the current pressure state;
Pressure state is preserved and the pressure record unit: be used to preserve said brake-cylinder pressure state, abandon or current pressure value that preservation obtains.
8. device according to claim 7 is characterized in that, said current pressure state judging unit further comprises:
The first setting value comparison module: whether be used to judge said current pressure rate of change more than or equal to first setting value, in this way, said brake cylinder state is for rising;
The second setting value comparison module: be used to judge said current pressure rate of change whether less than first setting value greater than second setting value, in this way, said brake-cylinder pressure state is steady; If the current pressure rate of change is smaller or equal to second setting value, said brake-cylinder pressure state is for descending.
9. device according to claim 8 is characterized in that, also comprises:
The 3rd setting value comparison module: the pressure state that is used for its pressure cylinder of comparison be judged as pulsation-free when the pressure change rate of front brake cylinder whether greater than the 3rd setting value.
10. device according to claim 8 is characterized in that, said pressure state is preserved and the pressure record unit also further comprises:
Data packetization module: be used for said current pressure value and the time value of gathering this current force value according to the RFID tag format packing of setting;
Data transmission blocks: be used for the RFID label and send said data packet.
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| CN109113978A (en) * | 2018-08-30 | 2019-01-01 | 中车株洲电力机车有限公司 | A kind of compressor control method, device and rail vehicle |
| CN112124277A (en) * | 2020-09-27 | 2020-12-25 | 中车唐山机车车辆有限公司 | Rail vehicle brake cylinder pressure control method and device and rail vehicle |
| CN113895422A (en) * | 2021-11-15 | 2022-01-07 | 中国铁道科学研究院集团有限公司 | Detection method and device for high-speed rail vehicle braking system |
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| CN102167028A (en) * | 2011-03-21 | 2011-08-31 | 深圳市远望谷信息技术股份有限公司 | Method and system for judging braking state of train carriages |
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| CN109113978A (en) * | 2018-08-30 | 2019-01-01 | 中车株洲电力机车有限公司 | A kind of compressor control method, device and rail vehicle |
| CN112124277A (en) * | 2020-09-27 | 2020-12-25 | 中车唐山机车车辆有限公司 | Rail vehicle brake cylinder pressure control method and device and rail vehicle |
| CN113895422A (en) * | 2021-11-15 | 2022-01-07 | 中国铁道科学研究院集团有限公司 | Detection method and device for high-speed rail vehicle braking system |
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