CN1094360A

CN1094360A - The rolling stock inertial defect automatic tester of no first bus

Info

Publication number: CN1094360A
Application number: CN 94102809
Authority: CN
Inventors: 顾冬梅
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-03-21
Filing date: 1994-03-21
Publication date: 1994-11-02

Abstract

The present invention relates to a kind of rolling stock inertial defect automatic tester that does not have first bus, mainly solved the automatic detection of rail vehicle brake system failure (Angle valve closes dead) and vehicle unhook fault, gather the air pressure of locomotive airduct by baroceptor, when braking and alleviation, obtain the gentle air pressure-function of time of separating of braking pressure-function of time, when hold mode, survey the air pressure-function of time of its natural leak, the application Single Chip Microcomputer (SCM) system compares the corresponding normal barometric pressure-function of time of above-mentioned function and this train respectively, judge the classification of train et out of order and the position that fault takes place, the present invention can be applicable to transporting safely of rolling stock, guarantees traffic safety.

Description

The rolling stock inertial defect automatic tester of no first bus

The invention belongs to rail vehicles and electronic technology field.

Under conventional situation, the trainman relies on the long signal of driving of first bus, understands the situation of rail vehicle, and Ministry of Railways's regulation cancellation first bus according to the knowledge of the applicant, does not still have the failure-free method and can replace the effect of first bus to the driver now.

The object of the present invention is to provide a kind of rolling stock inertial defect automatic tester that does not have first bus, be used for solving under the no first bus situation, the driver makes the driver in time find the fault and the trouble-shooting of taking measures to the timely understanding of rail vehicle situation, and its cost is lower than first bus.

The present invention can be detected the air pressure signal of locomotive breather pipe by baroceptor and microcomputer system, the present invention includes Single Chip Microcomputer (SCM) system, baroceptor part, A/D analogue to digital conversion, combined aural and visual alarm and telltale are partly formed, and form by following principle:

At first, baroceptor is placed the airduct place of locomotive, be used to measure the air pressure of train braking system, under the normal condition of utilization before train departure, measure the function (braking P-t function) of the air pressure-time of glancing impact under this row train normal condition, air pressure-function of time during alleviation under the normal condition (alleviating the P-t function), and the air pressure-function of time (leaking the P-t function) that is inflated to the natural leak of normal barometric pressure (6 barometric pressures) within back 1 minute, and the value of calculating dP/dt, utilize Single Chip Microcomputer (SCM) system that above-mentioned data are stored respectively;

Secondly, when train generation unhook fault, certain adaptor union that is train is disconnected, this moment, train line also was disconnected simultaneously, cause the airduct blast to descend rapidly, the present invention utilizes the value of its normal natural leak P-t function and dP/dt, and relevant logic determines (locomotive has or not braking maneuver, automatic wind braking mode when whether locomotive is in the electric braking deficiency), can judge that train is in the unhook faulty condition;

Once more, when the Angle valve of certain joint vehicle of train is closed when dead, cause the brake system failure of train, because the airduct of all vehicles that wreck vehicle is later all is switched off, so brake the P-t function this moment and alleviate the P-t function all with former normal condition under braking P-t function with alleviation P-t function bigger error is arranged, utilization rises to the needed inflation of (or dropping to) the same atmospheric pressure value error amount of (or venting) time with same atmospheric pressure value, (this value is by the sensitivity of sensor when the relative error value reaches a certain appropriate value, the calculation error decision), the present invention thinks that promptly train is in the faulty condition of brake system failure, and by calculating the size of relative error value particularly, the concrete vehicle of determining et out of order is so that the timely trouble-shooting of locomotive bus attendant;

Need to prove at last: alleviation process of the present invention comprises unintended release and quick alleviation process, and braking procedure comprises unintended braking and emergency braking process.

At present, the inertial defect of the rolling stock when still not having actv. equipment and can detect no first bus, in fact, the inertial defect of above-mentioned vehicle all happens occasionally in each locomotive depot of the Ministry of Railways, and cause cataphoretic failure, the present invention designs by above principle, can solve the detection problem of the rolling stock inertial defect of no first bus effectively.

Below in conjunction with accompanying drawing, describe the invention process process in detail.

Description of drawings:

Fig. 1 is the system line schematic diagram.

Baroceptor 1, the mouth 2 of baroceptor, output interface circuit 3, amplifying circuit 4, filter circuit 5, A/D analogue to digital conversion 6, interface chip 7, keyboard shows control 8, keyboard 9, and LED shows 10, combined aural and visual alarm 11, MCS-51 micro controller system 12, address latch 13, EPROM memory 14, logical OR circuit 15, braking contact impulse deviser 16, automatic wind brake pulse when electric braking is not enough is sent out device 17, alleviates impulse deviser 18, locomotive airduct 19.

Fig. 2 is a system flowchart.

Implementation process:

After native system starts, at first carry out the self check of system itself, to guarantee system's trouble free, then the data memory is carried out zero clearing, and detection driver operation handle position, according to the locomotive operation rule, before the train departure, should under normal condition, do braking and alleviate operation, when the driver operation handle is put retarder location, brake pulse signal generator 16 promptly sends pulse, and is detected by micro controller system 12, total system is in record braking pressure-function of time state, the air pressure of locomotive airduct 19 is detected by baroceptor 1, through amplifying circuit 4, and filter circuit 5, after the analogue to digital conversion 6, get in touch by interface chip 7 and micro controller system 12, the P-t function of record air pressure when 6.0 barometric pressures drop to 4.2 barometric pressures, and stored; When the driver operation handle is put the alleviation position, alleviate pulse signal generator 18 and promptly send pulse, and detected by micro controller system 12, total system is in record and alleviates air pressure-function of time state, the air pressure of locomotive airduct 19 is detected by baroceptor 1, through amplifying circuit 4, filter circuit 5 after the analogue to digital conversion 6, is got in touch by interface chip 7 and micro controller system 12, the P-t function of record air pressure when 4.2 barometric pressures rise to 6.0 barometric pressures, and stored, last, when the driver operation handle is put suppression, air pressure-the function of time of the natural leak when native system is recorded in 6.0 barometric pressures, and try to achieve the value of dP/dt.

When train generation unhook fault, when the locomotive brakeless moves, air pressure in the locomotive airduct 19 is also suddenly poly-to descend, the value that records air pressure ︱ dP/dt ︱ by baroceptor 1 is far longer than the value of the ︱ dP/dt ︱ of natural leak, and micro controller system 12 can be judged train place and unhook fault according to this and send sound and light alarm 11 simultaneously.

When train generation brake system failure (Angle valve closes dead) fault, owing to cut off passage at the later vehicle of the Angle valve of fault and the airduct and the brake cylinder of preceding vehicle, the ventilating set of locomotive is only to the brake cylinder of preceding vehicle put on the air (alleviation), because the brake cylinder quantity during fault is less than the quantity under the normal condition, so remission time is shorter than the remission time under the normal condition, native system can be differentiated the train et out of order in view of the above, and determine location of fault by remission time, send the position that sound and light alarm 11 and telltale 10 demonstration faults take place, equally, also can judge that Angle valve closes dead fault and definite position of fault with braking procedure.Being illustrated the P-t function that utilizes the alleviation process below by an example differentiates the train Angle valve and turns off fault.

Example: this row train is made up of 1 locomotive and 50 railway carriages, and the brake cylinder size of establishing locomotive and each railway carriage is identical, and under the normal circumstances, the air pressure in the locomotive breather pipe is charged to 6.0 barometric pressures by 4.0 barometric pressures and takes 1.5 minutes (90 seconds).

P 4.0 4.5 5.0 5.5 6.0

t 0 20 40 65 90

Now this train is under relieved state, and the air pressure in the locomotive breather pipe when being charged to 5.5 barometric pressures by 5.0 barometric pressures, takes 20 seconds, establishes X joint railway carriage generation Angle valve and turns off fault, then should have:

25/51＝20（X+1）

: X=39.8 gets X=40

Promptly the 40th joint railway carriage generation Angle valve is turned off fault.

Claims

1, a kind of automatic tester that does not have the rolling stock inertia of first bus is by baroceptor, amplifying circuit, and analogue to digital conversion, filter circuit, Single Chip Microcomputer (SCM) system, combined aural and visual alarm and LED display circuit are formed, and it is characterized in that:

A), the pressure measurement parts: by 1 baroceptor 1, baroceptor mouth 2, output interface 3, amplifying circuit 4, filter circuit 5 and A and D converter 6 link;

B), the control loop measurement component: alleviate action pulse signal generator 18, braking maneuver pulse signal generator 16, automatic wind braking maneuver pulse signal generator 17 when electric braking is not enough and logical OR circuit 15 are formed;

C), Single Chip Microcomputer (SCM) system parts; By interface chip 7, MCS-51 micro controller system 12, programming controller 14, address latch 13, keyboard display controller 8, keyboard 9, light-emitting diode display 10 and combined aural and visual alarm 11 are formed;

D), detect data and software section: the detection data comprise the alleviation P-t function under the normal condition, above-mentioned three kinds of P-t functions under braking P-t function and leakage P-t function and the error state, the function of software is to compare respectively according to the P-t function under P-t function under above-mentioned three kinds of normal conditions and the error state, and calculate its error, judge the classification of fault of train and the position of fault according to this.

2, detection data according to claim 1 and software section, its feature also is: the air pressure range of alleviating under the normal condition in P-t function and the braking function P-t function is to be pressed onto 6.0 barometric pressures from 4.2 atmosphere, and the scope of the value of the air pressure P in P-t function under other situation and the braking P-t function is no more than the scope of the air pressure P under the normal condition.

3, pressure measurement parts according to claim 1, its feature also is: for avoiding the interference of machine airduct internal gas pressure, baroceptor can place one with air chamber that the locomotive airduct communicates in.