Signal sampling channel case
Technical field
The utility model relates to a kind of track traffic instruction carriage data collector, relates to particularly a kind of portable signal sampling channel case.
Background technology
Now, the test of the traction of locomotive and electric braking performance is often by measuring its net end and motor terminal voltage and current signal.In order to measure comprehensively and accurately needed electric signal, normally at net end and the motor side place of tested engine, high-precision voltage and current sensor is installed, the signal of high voltage and large electric current is transformed small magnitude voltage signal by sensor, again small magnitude voltage signal is sent in signal sampling channel case and is nursed one's health by signal wire, be finally processed into the analog voltage signal that data acquisition system (DAS) can detect.
Existing locomotive test is that the signal wire unification of multiple voltage, current sensor is pooled to and connects the instruction carriage that the hangs over locomotive rear portion plate of reaching the standard grade, and is then transferred and is placed in the signal sampling channel case on instruction carriage by the plate of reaching the standard grade, and processes.Such method need to need the signal wire of fixing many sensors at the trial, and especially, under the condition being pressed for time, test efficiency can be subject to no small impact.
And signal sampling channel case of the prior art is fixedly installed in harvester between test vehicle equipment cashier's office in a shop, in the process of signal debugging and plant maintenance, sometimes need to remove and install, can not meet flexibly field demand.Meanwhile, the signal conditioning circuit in the signal sampling channel case of fixed installation formula and sensor power supply share same road power supply, and isolation and integrality on signal affect to some extent, can not meet the requirement of high-acruracy survey.For this reason, those skilled in the art are unremitting research in order to overcome the defect of prior art, for example, in following patented technology, discloses a kind of correlation technique that can substitute signal sampling channel case of the prior art.
Be that publication number is CN101593565, the Chinese invention patent application that name is called " a kind of portable electromagnetic shielding box for testing weak signals of mobile terminal " discloses following technical scheme: this electromagnetic shielding box has six panels, six panels are all made with aluminium or aluminium alloy, in six panels, mixing are pasted with to Electromagnetic Wave Absorbing Plate and wedge wave absorbing material to absorb the incident wave of all directions; On bottom panel, the residing position of Devices to test is also provided with insulation medium board to isolate terminal to be measured and absorbing material, and this insulation medium board is placed in case, when test, mobile terminal to be measured is placed on this insulation medium board; On top panel, be provided with the joint of a signal turnover, and connect the excellent electric contact of the system that realizes by welding manner; On front panel, be provided with and be convenient to wait the measurement equipment opening putting into and take out, be provided with conductive gasket and shielding guipure to form doorframe in the surrounding of opening, be also provided with the door for closing and open opening.
But above-mentioned patented technology does not overcome the defect of prior art completely, therefore, the inventor makes the present invention based on prior art defect.
Utility model content
It is a kind of easy for installation, simple in structure that the purpose of this utility model is to provide, and measuring accuracy is high, the signal sampling channel case for locomotive test of advantages of good shielding performance.
In order to realize above-mentioned object, the utility model adopts following technical scheme.
A kind of signal sampling channel case, described signal sampling channel case is arranged at locomotive and is communicated with the same multiple sensors that are arranged at locomotive, described channels of information acquisition case is also communicated with instruction carriage terminal block by wired or wireless mode, the input end of wherein said signal sampling channel case has multiple input ports, input port and a corresponding connection in described sensor described in each; The output terminal of described signal sampling channel case has at least one output port, the connection corresponding to described instruction carriage terminal block of described output port, and the quantity of described output port is less than the quantity of described input port.Like this, formed the basic structure of signal sampling channel case of the present utility model, it is simple in structure, and related art is simplified.
Further, the syndeton between the every pair of described input port and the port of corresponding described sensor differs from one another, i.e. the port of the different and/or described sensor of described input port structure each other structure difference each other.Like this, make signal sampling channel case of the present utility model there is anti-tolerance design, avoid misoperation.
Preferably, the quantity of described output port is one.The further like this circuit mounting structure of having simplified related art.
In addition, in described signal sampling channel case, being provided with can be from the modular converter of the signal of described output port output, for the conditioning module of conditioned signal with for the supply module to modular converter and conditioning module power supply by converting to from the signal of described input port input, and described supply module is electrically connected with described modular converter and described conditioning module.Like this, make signal sampling channel case of the present utility model adopt internal electric source design, separate with the power supply for sensor, further promoted the degree of accuracy of measuring.
In addition, preferably in described signal sampling channel case, be provided with air channel, described air channel is included at least one blow vent forming on described signal sampling channel case, and at described blow vent, place is provided with waveguide net.Like this, be provided with the waveguide net for shielding, further promoted measuring accuracy.
In addition, preferably on the ground plane of described signal sampling channel case, be provided with the supporting construction that supports described signal sampling channel case, described supporting construction is isolated from each other described ground plane and ground.More preferably, described signal sampling channel case is cube structure, and described supporting construction is included in the cornerite arranging respectively on eight angles of described cube structure and strengthens structure.It is that elastic body cornerite strengthens structure that described cornerite strengthens structure, and described elastic body at least comprises rubber.Such supporting construction not only can support signal sampling channel case of the present utility model securely, and can play anti-skidding effect.
In addition, preferably described signal sampling channel case is provided with holding structure, and described holding structure is the handle of being fixed by groove milling jam nut.Like this, this handle signal sampling channel case that can be easy to carry, and this handle can bear relatively large pulling force.
In addition, preferably in described signal sampling channel case, be provided with enhancing structure, described enhancing structure comprises at least one web beam and/or at least one stiffening rib.Like this, can further strengthen the integrally-built intensity of signal sampling channel case of the present utility model.
By adopting above-mentioned technical scheme, it is a kind of easy for installation, simple in structure that the utility model provides, and measuring accuracy is high, the signal sampling channel case of advantages of good shielding performance.
Brief description of the drawings
Fig. 1 is application the utility model signal sampling channel punch-out equipment car and instruction carriage syndeton schematic block diagram;
Fig. 2 is the syndeton schematic block diagram of the functional module of signal sampling channel case of the present utility model;
Fig. 3 is the schematic top plan view of signal sampling channel case of the present utility model;
Fig. 4 is that the master of signal sampling channel case of the present utility model looks schematic diagram;
Fig. 5 is the schematic rear view of signal sampling channel case of the present utility model.
In accompanying drawing, the component Name of each mark representative is described as follows
1 signal sampling channel case
11 input ports
12 output ports
13 cornerites strengthen structure
14 handles
15 blow vents
16 waveguide nets
Embodiment
It is a kind of easy for installation, simple in structure that the utility model is to provide, and measuring accuracy is high, the signal sampling channel case of advantages of good shielding performance.Below in conjunction with Figure of description, concrete technical scheme of the present utility model is described in detail.In the accompanying drawings, the word segment in functional block diagram and syndeton block diagram, identical assembly or parts use the same reference numerals to represent.
Fig. 1 is application the utility model signal sampling channel punch-out equipment car and instruction carriage syndeton schematic block diagram.In embodiment of the present utility model shown in Figure 1, adopt the portable signal sampling channel case of being made by high-strength alloy framework to realize the collection of locomotive sensor device electric signal.In locomotive cab or electric equipment compartment, the electric signal unification of multiple sensors is linked in signal sampling channel case, then be that a signal connecting line outputs to the instruction carriage terminal block being configured on instruction carriage by vasculum signal is collected, and the final data acquisition equipment being configured on instruction carriage that utilizes carry out data acquisition.
Fig. 2 is the syndeton schematic block diagram of the functional module of signal sampling channel case of the present utility model.Wherein, in signal sampling channel case, being provided with can be from the modular converter of the signal of output port output, for the conditioning module of conditioned signal with for the supply module to modular converter and conditioning module power supply by converting to from the signal of input port input, and supply module is electrically connected with modular converter and conditioning module.This signal sampling channel case has been realized locomotive sensor device electrical signal collection like this.As shown in Figure 2, in locomotive cab or electric equipment compartment, the electric signal unification of multiple sensors is linked in signal sampling channel case, in casing, be equipped with the switching circuit board as modular converter, the sensor signal of its all accesses is collected same aviation plug (being output port) output by switching circuit board, when wiring, utilize a signal connecting line signal wire that signal leading is arrived to instruction carriage terminal block, greatly simplify the fixing of signal wire in test set-up procedure, thereby improved work efficiency.
Fig. 3 is the schematic top plan view of signal sampling channel case of the present utility model; Fig. 4 is that the master of signal sampling channel case of the present utility model looks schematic diagram; Fig. 5 is the schematic rear view of signal sampling channel case of the present utility model.In the embodiment of the signal sampling channel case shown in Fig. 3 to Fig. 5, the input end of signal sampling channel case 1 has multiple input ports 11, each input port 11 for a corresponding connection of sensor; The output terminal of signal sampling channel case has an output port 12, and output port 12 is for connection corresponding to instruction carriage terminal block.
Further, in the present embodiment, the front panel of signal sampling channel case 1 is the input aviation plug of locomotive sensor device electric signal, and air plug adopts anti-mis-insertion design, and different sensors signal is distinguished.Particularly, the syndeton between the every pair of input port 11 and the port of corresponding sensor differs from one another, the port that can make in the present embodiment structure difference each other of input port 11 and/or sensor structure difference each other.In addition, in signal sampling channel case 1, be provided with air channel, air channel is through the disparate modules in signal sampling channel case 1, for these modules are dispelled the heat.This air channel is included in multiple blow vent 15(of forming on signal sampling channel case as shown in Figure 5), at each blow vent, 15 places are provided with waveguide net 16, and this waveguide net 16 can reduce the electromagnetic interference (EMI) of Radio frequency interference (RFI) to case in-body power source greatly.
In addition, be provided with the supporting construction that supports signal sampling channel case 1 on signal sampling channel case 1, supporting construction is isolated from each other ground plane and ground.The casing that signal sampling channel case 1 is cube structure in the present embodiment, this casing plane cover plate is 19 inches of standard panels, is highly 3U.Supporting construction is included in the cornerite arranging respectively on eight angles of casing of cube structure and strengthens structure 13.Cornerite strengthens structure 13 for elastic body cornerite enhancing structure, in the present embodiment elastic body be various known can be for the rubber as supporting construction.This supporting construction that signal sampling channel case 1 adopts makes to reduce the collision while use, is beneficial to fix not slide.The conditioning power supply of sensor power supply and signal circuit separately, ensures good signal isolation, improves sampling precision.
In addition, signal sampling channel case 1 is provided with holding structure, and holding structure is the handle 1 of being fixed by groove milling jam nut, can bear the weight of 100 kilograms.
In addition, in signal sampling channel case in the present embodiment, be also provided with enhancing structure, this enhancing structure comprises at least one web beam and/or at least one stiffening rib (not shown).
Be described more specifically feature and the using method of signal sampling channel case of the present utility model below, and their beneficial effects of bringing.
The mechanism design of the signal sampling channel case of an embodiment of the present utility model adopts the framework of light high-intensity alloy, inner by wooden partition milling groove in echelon, casing adopts crossbeam to reinforce, and is ensureing further to have strengthened portability on the basis that casing is solid, firm.The anise of casing adopts die sinking rubber parcel, and the octahedral of casing is landed while laying, and surface of contact all can directly not contact with ground and cause tank surface to scratch; Rubber cornerite can play anti-skidding effect simultaneously, can effectively slow down the impulsion that train causes in operational process.In addition, this channel box internal electric source adopts separating type linear stabilized voltage supply power supply plan, by sensor power supply and modulate circuit power supply isolation, has avoided the interference of signal; Casing has also carried out the isolation of EMI electromagnetic interference (EMI) and has strengthened, and air hole utilizes the isolation of waveguide net, and these measures have all promoted the Electro Magnetic Compatibility of signal sampling channel case.
In sum, this patent is applied to the principal feature of locomotive test:
1, box house built-up circuit has been optimized the IO interface of portable signal sampling channel case, has facilitated locomotive test wiring;
2, body structure adopts light high-intensity alloy and structural strengthening, and anistree cornerite strengthens the stability of portable and structure;
3, internal electric source isolation and the design of waveguide net, promoted anti-EMI Electro Magnetic Compatibility, can be applied in severe electromagnetic environment.
In the time using the signal sampling channel case of above embodiment, this signal sampling channel case is placed in to cab or the electric equipment compartment of locomotive, for convenience of power taking, the input of acquisition channel case power supply adopts AC220V, is sensor power supply by the D.C. regulated power supply in case.First, sensor will be linked into the front panel of casing after the analog voltage signal that the net of electrical network end is pressed, the electric moter voltage of net stream and traction electric machine end and electric current are converted into small magnitude; Secondly, the analog voltage signal of sensor output is sorted out the rear unified aviation plug output that outputs to rear panel of conditioning by the switching circuit board of box house; Finally, aviation plug output is input to locomotive rear portion by the signal connecting line of 30m-50m and connects the instruction carriage of the hanging plate correspondence position of reaching the standard grade, the instruction carriage plate of reaching the standard grade is sunken cord and is connected by inside with the signal connecting line between instruction carriage collection, and then instruction carriage gathers signal.
By adopting above-mentioned concrete technical scheme, it is a kind of easy for installation, simple in structure that the utility model provides, and measuring accuracy is high, the signal sampling channel case of advantages of good shielding performance.
Protection domain of the present utility model is not limited to the specific embodiment illustrating in above-mentioned embodiment, as long as but the combination that meets technical scheme just fallen in protection domain of the present utility model.