CN2757134Y - Two-way pitot tube and its two-way flow speed sensor and train pipe through monitor - Google Patents

Abstract

The utility model relates to a two-way pitot tube and a two-way flow speed sensor and a train pipe through monitor. The two-way flow speed sensor comprises a two-way pitot tube, a sensor coat housing and an inner sleeve pipe, wherein an inner cavity of the sensor coat housing is provided with a cylinder cavity, and the outer surface of the vertical upper side or the lower side of the coat housing is provided with two through holes which are matched with the voltage guide hole of the two-way pitot pipe. The train pipe through monitor comprises a two-way flow speed sensor, a pressure sensor, a temperature sensor and a signal processing circuit, wherein the signal processing circuit conducts the operational processing according to the receiving pressure, the temperature and the flow speed signal. On one hand, the signal processing circuit is connected with a cab signal recorder through a serial communication module, on the other hand, the signal processing circuit is connected with a display module of the monitor, and meanwhile, the communication of the signal processing circuit and an upper machine is realized through a USB port. The utility model completes the intellectualized monitoring of closing abnormally a train pipe angle cock, realizes the two-way monitoring functions of braking and relieving, and solves the problem that railway departments solve but always no solve for scores of years.

Description

Two-way Pitot tube and bidirectional flow speed sensors thereof and train pipe connect monitoring device

One, technical field

The utility model relates to a kind of Pitot tube, flow sensor and pipeline and connects pick-up unit, particularly relates to a kind of two-way Pitot tube and bidirectional flow speed sensors thereof and train pipe and connects monitoring device.

Two, background technology: at the China railways train normally with air damper as main brake system.Locomotive is equipped with compressor, total reservoir, brake, train pipe, braking reservoir and angle cock, and train pipe, braking reservoir and angle cock are installed on each vehicle.After the train marshalling list connection is finished, close the angle cock at train two ends and open remaining angle cock of train, connect the brake system of whole train by the train pipe.The locomotive driver and conductor changes braking and the alleviation that realizes train by brake control train pipe internal pressure.But the train station stop or operational process in; because human factor; take off as staff's carelessness, idler and to take advantage of and non-artificial factor etc.; can cause closing unusually of train pipe angle cork between vehicle; thereby block the train pipe and connect path; make its rear portion motor vehicle braking system out of control, cause the generation of train travel accident sometimes, cause the massive losses of national economy property and people's life safety.

Be organized into train by locomotive and plurality of vehicles, its brake system is a pressure pipeline system that limit for length, unsteady flow, terminal sealing are arranged.It has fluid impact pressure big (maximum impact pressure 700kpa), and the characteristics of the instantaneous pressure of pipeline, fluctuations in discharge wide ranges are typical distribution parameter systems.Handle to typically use partial differential equation for the accurate Calculation of distributed parameter system, cause boundary condition to determine more but reach train marshalling list randomness for intensive, the type of vehicle of partial differential equation, make calculate in real time become impossible.Thereby for a long time, for how judging that the train pipe angle cork open and close just become one of technical barrier that needs to be resolved hurrily with monitoring train pipe breakthrough status.

China utility model patent ZL98204154.3 has proposed a kind of " train pipe breakthrough status monitor ", takes advantage of the main frame in the pilothouse to constitute by being serially connected with the detection components in the train pipe and being installed on department.Detection components comprises that pressure transducer, flow sensor and preposition amplification system and pulse produce shaping circuit.In the main frame for being the data handling system of core with the one-chip computer.Be used for after train dwelling pressure testing or operational process railroad train are cared for passenger-cargo vehicle because abnormal factors and the angle cock that may occur is closed unusually or the monitoring of the unusual blocking position of train pipe.Its flow sensor adopts vortex street sensor, turbine sensor or differential pressure flow transducer.And sensor is the core key technology of train pipe breakthrough status monitoring system, calculating influence to a number is the most key, abominable working environment (electromagnetic interference (EMI) at locomotive, mechanical vibration, noise, range of temperature is big) under, these flow sensors commonly used are operate as normal for a long time all, some in addition do not reach minimum accuracy requirement far away, said nothing of the accuracy of measurement result.Above-mentioned utility model patent can't realize that the train pipe connects measuring ability.

Three, utility model content: the utility model connects the problem that monitoring device exists at the described current train pipe of background technology, Pitot tube structure and tachogenerator have been reformed, realized two-way Pitot tube and bidirectional flow speed sensors, and the train pipe connects monitoring device.

The technical solution adopted in the utility model is: a kind of two-way Pitot tube, contain flat body, pitot hole and baroport, the forward and backward plane of flat body is parallel to each other, the left and right both ends of the surface of flat body are approximate fairshaped curved surface, horizontal direction 0 degree and 180 degree both forward and reverse directions at this flat body are equipped with two snorkels, have the connection tracting pressuring hole above or below the flat body of every each comfortable clockwise or anticlockwise plus or minus 90 degree vertical direction of snorkel, the mouth of pipe of two snorkels of 0 degree and 180 degree is pitot hole and baroport each other.

Described two-way Pitot tube, tracting pressuring hole are the screw thread tracting pressuring hole, and the central axis of snorkel overlaps with two-way Pitot body horizontal direction central shaft, the left and right symmetry of two-way Pitot body, and upper and lower symmetry, snorkel end outer surface are taper.

A kind of bidirectional flow speed sensors that has described two-way Pitot tube, contain two-way Pitot tube, sensor overcoat housing and inner sleeve, the outer shell intracoelomic cavity of sensor has a cylindrical cavity, outside surface above or below this overcoat housing is vertical has two through holes that are complementary with two-way Pitot tube tracting pressuring hole, by the hollow coupling bolt overcoat housing and the connection of two-way Pitot body are fixed in the cylindrical cavity of overcoat housing, in each corresponding truncated cone chamber of two snorkel length directions, what be connected with two truncated cone chamber small ends coupling is cylindrical cavity in two inner sleeves.

Be provided with a mounting plane above or below the described sensor, overcoat housing, have pilot hole in the plane and connection tightens up the hole, the inner sleeve on overcoat housing and both sides is connected and fixed by fastener.

A kind of train pipe that has described bidirectional flow speed sensors connects monitoring device, contain the bidirectional flow speed sensors, pressure transducer, temperature sensor, and signal processing circuit CPU module, communication module, display module and power module, described pressure transducer is installed on the train pipe, temperature sensor probe is installed in and is exposed in the atmosphere on the locomotive, the bidirectional flow speed sensors is installed between locomotive brake gear and the train pipe, two pressure ports of flow sensor connect differential pressure transmitter, if flow velocity, pressure, temperature sensor is output as analog signals, then the electric signal of sensor output involves signal amplification circuit access A/D modular converter after filtration, and the output of A/D modular converter inserts the corresponding I/O port of CPU; If flow velocity, pressure, when temperature sensor is output as digital quantity signal, then the digital signal of each sensor output directly inserts the corresponding I/O port of CPU, described communication module comprises serial communication module and USB communication module, signal processing circuit CPU module connects the locomotive signal recorder by the serial communication module on the one hand, the display module that connects monitoring device on the other hand by the serial communication module, synchronous signal treatment circuit CPU module realizes and the host computer communication that by the USB communication module power module provides working power for the monitoring device each several part.

Described train pipe connects monitoring device, the CPU module of signal processing circuit adopts ARM7CPU, the CPU module is integrated with the data storage cell of the DataFlash of 2M as system, external SRAM storer with an expansion, described bidirectional flow speed sensors is output as analog quantity, pressure transducer adopts the analog quantity instrument, temperature adopts the digital quantity instrument, CPU adopts AT91FR40162, the A/D modular converter adopts TLV2544 12 bit serial transducers, flow velocity, pressure simulation amount signal inserts corresponding signal amplification circuit after filtering, the output of each amplifying circuit inserts 6 of TLV2544 respectively, 8 pin and 7,9 pin, signal output after the TLV2544 conversion through its 1,2,3,4,10,16 pin insert 44 of AT91FR40162,45,46,47,43,42 pin, 16 of TLV2544,2,3,13,10 pin connect power supply by pull-up resistor respectively; Temperature sensor adopts DS 1820 digital temperature sensors, the digital quantity temperature signal of its output directly holds 34 pin to be connected with the I/O of CPU by connecting lead or connection terminal, the serial communication module adopts two groups of MAX485E, communication modes adopts RS-485/ half duplex serial bus mode, its serial port is connected with the locomotive operation registering instrument with the display box of display module respectively, and the serial port that is connected with the locomotive operation registering instrument is isolated by photoelectricity and is connected with CPU; The USB communication module adopts the PDIUSBD12.USB interface chip, and described display module FPDP 1～4,6～9 connects 11～18 pin of CPU, and its FPDP 25,26 realizes and upper machine communication by corresponding USB plug connector.

Described train pipe connects monitoring device, and CPU adopts the ARM7CPUAT91FR4042 with similar function, or AT91FR4081, and the A/D transducer uses TLV2548, perhaps TLC2574, perhaps TLC2578.

Described train pipe connects monitoring device, signal processing circuit and functional module and interface circuit are installed on the mainboard, mainboard is installed in the slot of the original TXS case in locomotive control chamber, pressure, flow velocity, in temperature sensor is installed between the machinery of locomotive, connect with cable between them, each interface module of complete machine and mainboard is used the power supply of TXS case, provide+5V to each functional module of monitoring device by it, + 15V, + 24V power supply, this monitoring device connects the locomotive signal recorder by described serial communication module lead, the train information that uses the cab signal registering instrument to provide, described display module comprises that two have the display box that shows charactron, two groups show that charactron is connected by the serial communication interface and the power supply of corresponding connector and monitoring device respectively, display box is installed on the control stand of locomotive control chamber, the display column vehicle number, train pipe breakthrough status and position.

Positive beneficial effect of the present utility model:

1, with the ingenious combination of unidirectional Pitot tube, constitute two-way Pitot tube, structure and processing technology are simple, cost is low, are used for two-way flow rate detection, and precision is very high in the certain flow rate scope, and dependable performance is corrosion-resistant, do not have any running gear, long service life.

2, utilize two-way Pitot tube to design the bidirectional flow speed sensors, simple in structure, easy to install, be suitable for comparatively rugged environment, it is reliable, stable to work long hours, and is equipped with the higher precision differential pressure transmitter and finishes fluid-velocity survey, for calculated flow rate provides reliable data.

3, bidirectional flow speed sensors, the aperture can be accomplished very little, can use in very thin pipeline, dynamic response is fast, and the pressure loss is little, and it is little to take installing space, particularly suitable is measured the dynamic flow velocity of unsteady flow at some special occasions (as pressure pipeline), and result of use is good.

4, the train pipe connects monitoring device, adopt bidirectional flow speed sensors and high-precision pressure sensor and digital temperature instrument, utilize advanced Computer Control Technology, finished the intelligent monitoring that train pipe angle cork is closed unusually, braking and the bidirectional test function of alleviating have been realized, at first calculate the train of vehicles number, state and locomotive leakage classification according to system correctly is divided into data dissimilar the correction again, draw a last train run-through number, experiment is monitored with interior goods train at 60 train marshalling list, and its trueness error is no more than 4.

5, use the USB interface chip, the communication of setting up mainboard and external host can be finished the rewriting of program, the extraction of sampled data and the demonstration of mainboard duty etc.The serial communication module guarantees the communication of mainboard and two display boxes, shows testing result, carries out audio alert simultaneously as required.Easy to use, simple to operate, stable performance, reliable.

6, owing to adopt photoelectricity to isolate and other vibration damping, soundproof measures, make monitoring device have anti-electromagnetic interference (EMI), characteristics such as Antiimpact pressure, mechanical vibration, noise, temperature variation are big are adapted at the rugged surroundings long-play, and stable and reliable for performance, monitoring accurately.

7, the utility model has solved the problem that the Ministry of Railways wants to solve in decades and never solve, particularly under the situation of China railways system speed raising, be to guarantee traffic safety, of the present utility modelly apply even more importantly that the Ministry of Railways very payes attention to the utility model technology.

Four, description of drawings:

Fig. 1-1,1-2,1-3 are respectively two-way Pitot tube sectional structure synoptic diagram, side-looking structural representation and structural representation vertical view

Fig. 2: two-way Pitot tube test philosophy figure

Fig. 3: with the bidirectional flow speed sensors outer tube plan structure synoptic diagram of two-way Pitot tube

Fig. 4: the bidirectional flow speed sensors sectional structure synoptic diagram of band inner sleeve shown in Figure 3

Fig. 5: the train pipe connects monitoring device hardware configuration block scheme

Fig. 6: the train pipe connects monitoring device motherboard circuit functional-block diagram

Fig. 7: the train pipe connects monitoring device CPU modular circuit schematic diagram

Fig. 8: the train pipe connects monitoring device pressure, flow velocity signal amplification and filtering circuit, A/D modular converter circuit theory diagrams

Fig. 9: the train pipe connects monitoring device serial communication module electrical schematic diagram

Figure 10: the train pipe connects monitoring device USB communication module electrical schematic diagram

Figure 11: the train pipe connects monitoring device power module electrical schematic diagram

Five, embodiment:

Embodiment one: referring to Fig. 1-1, Fig. 1-2, Fig. 1-3, two-way Pitot tube contains flat body 10, the forward and backward plane of flat body 10 is parallel to each other, the left and right both ends of the surface of flat body 10 are approximate fairshaped curved surface, horizontal direction 0 degree and 180 degree both forward and reverse directions at this flat body are equipped with two snorkels 9 and 11, the mouth of pipe 5 and 6 that the flat body top of every each comfortable vertical direction of snorkel has two snorkels 9 being communicated with that tracting pressuring hole 7 and 8,0 degree and 180 spend and 11 is pitot hole and baroport each other.

Described tracting pressuring hole 7 and 8 is the screw thread tracting pressuring hole, and snorkel 9 and 11 central axis overlap with two-way Pitot body horizontal direction central shaft, the left and right symmetry of two-way Pitot body, and upper and lower symmetry, snorkel 9 and 11 end outer surface are taper.

Two-way Pitot tube principle of work: referring to Fig. 2, different with unidirectional Pitot tube is, two-way Pitot tube does not have special-purpose baroport, but stagnation pressure or baroport each other.When A rectified the counter current flow direction of flow, then the A end was pitot hole, and the B end is baroport; When B rectified the counter current flow direction of flow, then the B end was pitot hole, and the A end is baroport.The stagnation pressure snorkel principle of the stagnation pressure snorkel of two-way Pitot tube and unidirectional Pitot tube is the same, repeats no more here.The static pressure of two-way Pitot tube is taken from the recirculating zone of fluid, the pressure at Center Vent tube place, recirculating zone is a negative pressure with respect to the static pressure of fluid, and be all pressures comparatively stable in the recirculating zone, the static pressure that has reflected fluid linearly changes, and multiply by after the static pressure correction coefficient it and can be used as static pressure and use.The pressure at A, B two ends is incorporated into the differential pressure transmitter (being that zero point is adjustable) that can measure forward and reverse differential pressure on a large scale by snorkel impulse pipeline, records the differential pressure value of stagnation pressure and static pressure.If reach higher measuring accuracy, on the one hand will be well-designed and demarcate to the profile of Pitot tube, thus obtain correct Pitot tube coefficient; Front and back end straight-line segment pipeline to measurement point has certain length requirement on the other hand, and temperature, pressure data that need to extract fluid are as revising numerical value.The calculating of flow velocity and flow uses unidirectional Pitot tube computing formula to carry out computing.

Embodiment two: referring to Fig. 3, Fig. 4, the bidirectional flow speed sensors contains two-way Pitot tube 1, sensor overcoat housing 2 and inner sleeve 3, the top of the overcoat housing 2 of sensor is provided with a mounting plane, have pilot hole in the plane and connection tightens up the hole, overcoat housing 2 inner chambers have a cylindrical cavity, the outside surface of these overcoat housing 2 vertical tops has two through holes 4 that are complementary with two-way Pitot tube tracting pressuring hole 8, by the hollow coupling bolt overcoat housing and two-way Pitot body 1 connection are fixed in the cylindrical cavity of overcoat housing 2, the big end in truncated cone chamber in two snorkels 9 and each corresponding inner sleeve 3 of 11 length directions and overcoat housing 2, the inner sleeve 3 that one end is provided with the truncated cone chamber is connected with cylindrical cavity coupling in the overcoat housing 2, the inner sleeve 3 on overcoat housing 2 and both sides or train pipeline section 12 are connected and fixed by fastener, and sensor overcoat housing 2 two ends are provided with interface connecting thread 13.

Embodiment three: referring to Fig. 5, for this system hardware of implementing sharp train run-through monitoring device constitutes.System is made of a mainboard, two display boxes, a pressure transducer, a flow sensor, a temperature sensor.Mainboard has taken a slot of locomotive TXS case, has used the common information of the power supply and the issue of cab signal registering instrument of TXS case, train number, a number, gross train weight is wherein arranged, change length, time, speed, kilometer post, visitor/goods, basis/benefit etc.The native system pressure transducer: adopt the pressure transducer of U.S. Nova company production high precision, high stability diffused-silicon pressure sensitive chip, its range ability is 0～1MPo.The precision and the linearity are 0.25 grade; The DS1820 digital temperature sensor that temperature sensor adopts U.S. DALLAS company to produce, it is wide that it has measurement range, measuring accuracy height, the characteristics that error is little.

Fig. 6 is a train run-through monitoring device motherboard circuit functional-block diagram.The circuit of mainboard is divided into CPU module, serial communication module, USB communication module, display module, A/D conversion and analog quantity interface.The analog signals of sensor output connects ARM7CPU by system bus after the A/D conversion, the digital quantity temperature signal all is connected with CPU by system bus with communication module, display module, and power module provides working power for each several part.System board is installed in the TXS case of locomotive control chamber; Display box is installed on the control stand of locomotive control chamber; In three sensors then are installed between locomotive machinery.Connect by cable between them.

Fig. 7～11 are formed for this circuit of implementing sharp train run-through monitoring device, comprise CPU module, signal amplification and filtering, A/D modular converter, serial communication module, USB communication module, power module etc.CPU selects the core of the AT91FR40162.ARM7CPU of comparatively popular Atmel company production as total system for use.Its maximum frequency is a 70M.32 position risc architecture, and 256K at sheet Flash, reaches 2 USART serial line interfaces etc. at sheet SRAM.1024K.The DataFlash that also is integrated with 2M on the CPU module is as the data-storing unit of system and the external SRAM of an expansion.TLV254412 bits serial A/D transducer that the A/D conversion module has adopted TEXAS Instruments company to produce, it has the sampling rate of per second 200K, the single supply of 2.7V～5.5V, the input of 4 tunnels analogies.Its good stability, degree of accuracy height, nonlinearity erron are positive and negative 1LSB.Analog channel has adopted current mode pattern conversion commonly used to guarantee the reliability and the degree of accuracy of sampling.Power module conversion from the power supply of TXS case goes out main 5V and the 24V that mainboard requires, and it has voltage stabilizing, overvoltage and overcurrent protection function.

The input end of analog signals input signal amplifying circuit after rc filter circuit filtering of flow sensor, pressure transducer output, the output of signal amplification circuit connects analog to digital converter.Flow velocity among the figure, the pressure signal amplifying circuit is all formed for level Four amplifier and a follower of being made up of the TLC4502 amplifier, amplify back flow velocity signal V01 and insert 6 of TLV2544,8 pin, pressure signal V02 inserts 7 of TLV2544,9 pin, flow velocity after the TLV2544 conversion, pressure signal through its 1,2,3,4,10,16 pin insert 44 of AT91FR40162,45,46,47,43,42 pin, 16 of TLV2544,2,3,13,10 pin connect power supply by pull-up resistor respectively, 5 and 12 pin of TLV2544 connect power supply, 11,14 pin ground connection, its 15 pin is by two capacitor C AD2 in parallel, CAD3 ground connection.The I/O that the digital quantity temperature signal of digital temperature sensor output directly inserts CPU holds 34 pin.

The serial communication interface module has two passages, all adopting model is MAX485E, RS485 protocol transmission chip, one is common 485 communication interfaces, adopted RS-485/ half duplex serial bus mode, another has used isolated RS-485 half duplex serial bus mode between CPU and 485 communication interface circuit, can guarantee TXS case system not to be caused interference, they connect two USART interfaces of CPU module respectively, i.e. 35 of CPU, 36,37 pin and 31,32,33 pin.The serial communication module mainly contains the communication that two function: A. guarantee mainboard and two display boxes, and the B. mainboard is accepted the train information of locomotive logout instrument.

It is the chip of PDIUSBD12PW that the USB communication interface adopts model, its 1～4,6～9 pin connects 11～18 pin of CPU respectively, 11,14,15,16,28 28,29,10,9,27 pin that connect CPU respectively, 24,25 pin connect bit machine USB socket, 22,23 of PDIUSBD12PW connects clock, 12,14 pin connect power supply by resistance, 30 pin of 12 pin series resistor connection simultaneously CPU, its 21 pin connects USB communication indication light emitting diode, and the ALE ground connection of PDIUSBD12PW, DMACK, power supply, the mouth that resets connect the vdd voltage of 3.3V in the interface module.The communication between outer computer and the mainboard is mainly finished in the USB communication, guarantees the packing and the high-speed transfer of data integrity.

1 of CPU, 2 pin are reset terminal, 7,68 pin are the input end of 3.3V voltage VDD, 39,40 pin are the input end of 5V voltage VCC, 38,41,80, pin is the GND earth terminal, 13～18 pin of 69～74 pin connected storage SN74HC245 of CPU module, 20 pin of SN74HC245 connect power supply, 1,10 pin ground connection, each connects power supply through resistance string sending and receiving optical diode its 2～7 pin, two passages that are the duty display circuit .RS485 serial communication interface of signal processing circuit connect the charactron driving circuit with serial ports, be the digital display tube on the display box panel, finish man-machine conversation, show result of calculation.

Enforcement sharp four: this implements profit three together this enforcement niche, and difference is: treatment circuit CPU adopts the ARM7CPU AT91FR4042 with similar function, and the A/D transducer uses TLV2548.

Enforcement sharp five: this implements profit three together this enforcement niche, difference: treatment circuit CPU adopts the AT91FR4081 with similar function, and the A/D transducer uses TLC2574, perhaps TLC2578.

Claims (8)

1. two-way Pitot tube, contain flat body, pitot hole and baroport, it is characterized in that: the forward and backward plane of flat body is parallel to each other, the left and right both ends of the surface of flat body are approximate fairshaped curved surface, horizontal direction 0 degree and 180 degree both forward and reverse directions at this flat body are equipped with two snorkels, have the connection tracting pressuring hole above or below the flat body of every each comfortable clockwise or anticlockwise plus or minus 90 degree vertical direction of snorkel, the mouth of pipe of two snorkels of 0 degree and 180 degree is pitot hole and baroport each other.

2. two-way Pitot tube according to claim 1, it is characterized in that: tracting pressuring hole is the screw thread tracting pressuring hole, and the central axis of snorkel overlaps the left and right symmetry of two-way Pitot body with two-way Pitot body horizontal direction central shaft, upper and lower symmetry, snorkel end outer surface are taper.

3. bidirectional flow speed sensors that has the described two-way Pitot tube of claim 1, contain two-way Pitot tube, sensor overcoat housing and inner sleeve, it is characterized in that: the outer shell intracoelomic cavity of sensor has a cylindrical cavity, outside surface above or below this overcoat housing is vertical has two through holes that are complementary with two-way Pitot tube tracting pressuring hole, by the hollow coupling bolt overcoat housing and the connection of two-way Pitot body are fixed in the cylindrical cavity of overcoat housing, in each corresponding truncated cone chamber of two snorkel length directions, what be connected with two truncated cone chamber small ends coupling is cylindrical cavity in two inner sleeves.

4. sensor according to claim 3 is characterized in that: be provided with a mounting plane above or below the overcoat housing, have pilot hole in the plane and connection tightens up the hole, the inner sleeve on overcoat housing and both sides is connected and fixed by fastener.

5. a train pipe that has the described bidirectional flow speed sensors of claim 3 connects monitoring device, contain the bidirectional flow speed sensors, pressure transducer, temperature sensor, and signal processing circuit CPU module, communication module, display module and power module, it is characterized in that: described pressure transducer is installed on the train pipe, temperature sensor probe is installed in and is exposed in the atmosphere on the locomotive, the bidirectional flow speed sensors is installed between locomotive brake gear and the train pipe, two pressure ports of flow sensor connect differential pressure transmitter, if flow velocity, pressure, temperature sensor is output as analog signals, then the electric signal of sensor output involves signal amplification circuit access A/D modular converter after filtration, and the output of A/D modular converter inserts the corresponding I/O port of CPU; If flow velocity, pressure, when temperature sensor is output as digital quantity signal, then the digital signal of each sensor output directly inserts the corresponding I/O port of CPU, described communication module comprises serial communication module and USB communication module, signal processing circuit CPU module connects the locomotive signal recorder by the serial communication module on the one hand, the display module that connects monitoring device on the other hand by the serial communication module, synchronous signal treatment circuit CPU module realizes and the host computer communication that by the USB communication module power module provides working power for the monitoring device each several part.

6. train pipe according to claim 5 connects monitoring device, it is characterized in that: the CPU module of signal processing circuit adopts ARM7CPU, the CPU module is integrated with the data storage cell of the DataFlash of 2M as system, external SRAM storer with an expansion, described bidirectional flow speed sensors is output as analog quantity, pressure transducer adopts the analog quantity instrument, temperature adopts the digital quantity instrument, CPU adopts AT91FR40162, the A/D modular converter adopts TLV2544 12 bit serial transducers, flow velocity, pressure simulation amount signal inserts corresponding signal amplification circuit after filtering, the output of each amplifying circuit inserts 6 of TLV2544 respectively, 8 pin and 7,9 pin, signal output after the TLV2544 conversion through its 1,2,3,4,10,16 pin insert 44 of AT91FR40162,45,46,47,43,42 pin, 16 of TLV2544,2,3,13,10 pin connect power supply by pull-up resistor respectively; Temperature sensor adopts the DS1820 digital temperature sensor, the digital quantity temperature signal of its output directly holds 34 pin to be connected with the I/O of CPU by connecting lead or connection terminal, the serial communication module adopts two groups of MAX485E, communication modes adopts RS-485/ half duplex serial bus mode, its serial port is connected with the locomotive operation registering instrument with the display box of display module respectively, and the serial port that is connected with the locomotive operation registering instrument is isolated by photoelectricity and is connected with CPU; The USB communication module adopts the PDIUSBD12.USB interface chip, and described display module FPDP 1～4,6～9 connects 11～18 pin of CPU, and its FPDP 25,26 realizes and upper machine communication by corresponding USB plug connector.

7. train pipe according to claim 5 connects monitoring device, it is characterized in that: CPU adopts the ARM7CPU AT91FR4042 with similar function, or AT91FR4081, and the A/D transducer uses TLV2548, perhaps TLC2574, perhaps TLC2578.

8. connect monitoring device according to each described train pipe of claim 5～7, it is characterized in that: signal processing circuit and functional module and interface circuit are installed on the mainboard, mainboard is installed in the slot of the original TXS case in locomotive control chamber, pressure, flow velocity, in temperature sensor is installed between the machinery of locomotive, connect with cable between them, each interface module of complete machine and mainboard is used the power supply of TXS case, provide+5V to each functional module of monitoring device by it, + 15V, + 24V power supply, this monitoring device connects the locomotive signal recorder by described serial communication module lead, the train information that uses the cab signal registering instrument to provide, described display module comprises that two have the display box that shows charactron, two groups show that charactron is connected by the serial communication interface and the power supply of corresponding connector and monitoring device respectively, display box is installed on the control stand of locomotive control chamber, the display column vehicle number, train pipe breakthrough status and position.

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