CN201261810Y

CN201261810Y - Apparatus for restraining critical impulse error counting

Info

Publication number: CN201261810Y
Application number: CNU2008203018721U
Authority: CN
Inventors: 汪慎独; 田庆红
Original assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Current assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Priority date: 2008-08-20
Filing date: 2008-08-20
Publication date: 2009-06-24
Anticipated expiration: 2018-08-20

Abstract

The utility model discloses a device for inhibiting miscount of critical pulses, which comprises a casing (1). A rotating shaft (4) located by a locating ring (2) and cover plate (3) is arranged in the casing (1), a inducing wheel (5) is fixed on the shaft (4), two or more than two wheel teeth (6) are arranged on the inducing wheel (5), two sensors (7) are arranged outside the casing (1) corresponding to the different two wheel teeth (6), the two sensors (7) are respectively connected with the input end of a suppressing circuit (8), the output end of the suppressing circuit (8) is connected with a counter (9). The device can well inhibit the critical pulses possibly produced before and after anode action, and completely or partly inhibit the rotary pulses, so as to count to the valid pulses, thereby the error of accumulated value of anode movement is reduced.

Description

A kind of device that suppresses critical pulse miscounting

Technical field

The utility model relates to a kind of device that suppresses critical pulse miscounting, belongs to aluminium cell control field.

Background technology

In the control of aluminium cell, for the accurate position of exact grasp anodic, usually on the motor of control anode lifting, surge generator is installed, the moving circle of lifting motor revolution, surge generator produces a pulse, based on this umber of pulse, can calculate the accurate position of anode electrolytic cell bus crossbeam, thereby obtain the accurate position of anodic.General surge generator is to be made of a transmitter and a semicircle induction wheel, and the semicircle induction wheel is connected with the output shaft of motor gear box, and rotates synchronously with the output shaft of motor gear box; Transmitter is installed in the radial position near the semicircle induction wheel, and when the semicircle induction wheel rotated, the entity of semicircle induction wheel entered the induction zone of transmitter, and the output level of transmitter generally becomes lower level by high level, the negative edge of a pulse occurs; When the entity of semicircle induction wheel leaves the induction zone of transmitter, the output level of transmitter becomes high level by lower level, the positive rise of a pulse occurs, induces a complete pulse.

But existing pulse generator the misdescription record occurs through regular meeting in some cases, causes the umber of pulse of record inaccurate.As: when lifting motor stopped operating, the diameter edge of semicircle induction wheel just was in the induction zone edge of transmitter, and this situation is called transmitter and is in critical sense state.Though at this moment lifting motor is in stationary state, slight vibrations may take place, cause the record of transmitter misdescription.And for example: owing to the general load of the used retarding mechanism of aluminium cell is all bigger, after lifting motor stopped, retarding mechanism may produce a small amount of bow tie.During revolution, if the diameter edge of semicircle induction wheel just in time enters or leave the induction zone of transmitter, transmitter can produce a rotary pulse edge.Because slot control machine can not be discerned the rotary pulse edge, can count the pulse edge of revolution (decline) in the pulse edge of rising, this also can cause counting error.

In order to overcome the problem of recording error; once attempted when lifting motor is shut down, also synchronous stop pulse sampling prevents the misdescription record that produces after lifting motor is shut down; but another problem has appearred so again; lifting motor is after outage, and for some time just stops because the inertia of motor also can remain in operation, and is to be difficult to grasp during this period of time; at this moment anode is also moving; because the meter phenomenon appears leaking in the stop pulse sampling, also can cause and can not correctly reflect the accurate position of anodic.

The utility model content

The purpose of this utility model is to provide a kind of device that suppresses critical pulse miscounting, be used to be suppressed at the issuable critical inductive impulse in anode action front and back, suppress or partly suppress rotary pulse fully, and only in respect of the number of imitating pulse, make anode move the aggregate-value error and reduce, to solve the deficiencies in the prior art.

The utility model is to constitute like this: the device of inhibition critical pulse miscounting of the present utility model comprises housing 1, be provided with in the housing 1 by set ring 2 and cover plate 3 localized rotating shafts 4, be fixed with induction wheel 5 in the rotating shaft 4, induction wheel 5 is provided with two or more gear teeth 6, the corresponding different gear teeth 6 are provided with two transmitters 7 outside housing 1, two transmitters 7 are connected to the input terminus that suppresses circuit 8 respectively, and the output terminal that suppresses circuit 8 is connected to counter 9.

In the device of above-mentioned inhibition critical pulse miscounting, 7 one edges that face the gear teeth 6 on the induction wheel 5 of described two transmitters, another faces the middle part of the gear teeth 6 on the induction wheel 5.

In the device of aforesaid inhibition critical pulse miscounting, described inhibition circuit 8 is installed on slot control machine 10 or the groove in the terminal box 11.

In the device of aforesaid inhibition critical pulse miscounting, described inhibition circuit 8 is made of AND circuit 12, OR circuit 13 and RS triggering circuit 14 and peripheral components, the Shu Ru Duan And of AND circuit 12 and OR circuit 13 is connected two transmitters 7 respectively after connecting, the output terminal of AND circuit 12 and OR circuit 13 is connected with two input terminuss of RS triggering circuit 14 respectively, the output terminal linkage counter 9 of RS triggering circuit 14.

In the device of aforesaid inhibition critical pulse miscounting, the model of described AND circuit 12 is MC14081, and the model of OR circuit 13 is MC14071, and the model of RS triggering circuit 14 is NE555.

Compared with prior art, the device of inhibition critical pulse miscounting of the present utility model, owing to adopted many gear teeth induction wheel and adopted two transmitters, two transmitters guarantee can not be in critical induction zone simultaneously when mounted.The signal of two other transmitter suppresses circuit by one and is connected to counter, have only two transmitters of working as to be in induction zone simultaneously or to be in non-induction zone simultaneously like this, just have triggering signal, but good restraining is issuable critical inductive impulse before and after the anode action, suppress or partly suppress rotary pulse fully, and only in respect of the number of imitating pulse, make anode move the aggregate-value error and reduce.

Description of drawings

Accompanying drawing 1 is a schematic diagram of the present utility model;

Accompanying drawing 2 is structural representations of induction wheel and Sensor section in the utility model;

Accompanying drawing 3 is sectional views of accompanying drawing 2;

Accompanying drawing 4 is overall annexation figure of the present utility model;

Accompanying drawing 5 is prior art constructions synoptic diagram;

Accompanying drawing 6 is four kinds of situation synoptic diagram that possible produce critical pulse.

Being labeled as in the accompanying drawing: 1-housing, 2-set ring, 3-cover plate, 4-rotating shaft, 5-induction wheel, the 6-gear teeth, the 7-transmitter, 8-suppresses circuit, 9-counter, 10-slot control machine, terminal box on the 11-groove, 12-AND circuit, 13-OR circuit, 14-RS triggering circuit, 15-anode lifting motor.

Embodiment

Embodiment of the present utility model: the device of inhibition critical pulse miscounting of the present utility model as shown in Figures 2 and 3, it comprises housing 1, during making, in housing 1, be provided with by set ring 2 and cover plate 3 localized rotating shafts 4, be fixed with induction wheel 5 in the rotating shaft 4, induction wheel 5 is provided with two or more gear teeth 6, the gear teeth 6 corresponding different outside housing 1 are installed two transmitters 7, make a transmitter 7 face the edge of the gear teeth 6 on the induction wheel 5, and another transmitter 7 face the middle part of another gear teeth 6 on the induction wheel 5; Two transmitters 7 are connected to the input terminus that suppresses circuit 8 respectively, and the output terminal that suppresses circuit 8 is connected to counter 9.Suppressing circuit 8 is installed on slot control machine 10 or the groove in the terminal box 11.Suppressing circuit 8 can adopt existing finished product to install, but preferably will suppress circuit 8 is that RS triggering circuit 14 and the electrical condenser that the AND circuit 12 of MC14081, OR circuit 13 that model is MC14071 and model are NE555 constitutes by model, be connected two transmitters 7 respectively after the Shu Ru Duan And company with AND circuit 12 and OR circuit 13, the output terminal of AND circuit 12 and OR circuit 13 is connected with two input terminuss of RS triggering circuit 14 respectively, the output terminal linkage counter 9 of RS triggering circuit 14.

Fig. 4 is overall annexation figure of the present utility model, and the rotating shaft in the utility model 4 is connected with the output shaft of the wheel box 15 of anode lifting motor as seen from the figure.

Control method of the present utility model is shown in the schematic diagram of Fig. 1.Top among Fig. 1 is the sketch that constitutes induction wheel 5 of the present utility model and transmitter 7, and the bottom is the schematic diagram that suppresses circuit 8 in the utility model, and the middle part is the truth table that expression suppresses the input and output relation of circuit 8.This method is to adopt the induction wheel 5 of two gear teeth 6 or two above gear teeth 6, the center of circle with induction wheel 5 is an initial point, in the radially different angles of induction wheel 5 angle in 7, two transmitters of two transmitters, 7 corresponding induction wheels, 5 centers of circle, the maximum rotation radian during greater than the critical vibrations of lifting motor are installed; Two transmitters 7 are respectively facing to the different gear teeth 6 on the induction wheel 5, rotary inductive wheel 5, affirmation can not be in critical sensed position simultaneously at arbitrarily angled two transmitters 7 of induction wheel 5, the signal of two transmitters 7 is connected to two input terminuss that suppress circuit 8, suppresses the output terminal linkage counter 9 of circuit 8.

Prior art constructions as shown in Figure 5, wherein the structure of induction wheel 5 as shown in Figure 6, as seen from the figure, the used induction wheel 5 of prior art is semicircles of a steel, be equivalent to have only the induction wheel 5 of gear teeth 6, four kinds of situations shown in Fig. 6, the induction zone of transmitter 7 is just in time at the gear teeth 6 edges of induction wheel 5, induction wheel 5 rotates a little will enter or leave induction zone, and these four kinds of situations very likely produce critical pulse.And only used a transmitter 7 in the prior art, anode lifting motor 15 has vibrations slightly so, even faint vibrations (as the frequent process operation of electrolyzer, anode lifting/lowering start and stop etc.) will produce critical inductive impulse or unnecessary error pulse, cause counting error.

Main improvement of the present utility model has following 3 points: the one, adopted the induction wheel 5 of many gear teeth, and improve the anodic pulse frequency, reduce repeatedly stored counts error.The 2nd, adopt two transmitters 7, produce two sequence anode moving pulse signals and be beneficial to distinguish effective impulse and critical idler Pulse.The 3rd, increase inhibition circuit 8 and be used to screen invalid critical pulse, improve the accuracy rate of counting.Through above improvement, the deficiencies in the prior art have been overcome substantially.

Principle of work of the present utility model is as follows:

Two transmitters are radially laid, and make the different gear teeth of each self-induction (seeing Fig. 2 and Fig. 3).Certain angle of rotation because two transmitters have staggered.Like this, the rising of the induced signal on two transmitters or negative edge do not occur simultaneously.This angle is greater than the maximum radian of critical vibrations, and when promptly critical induction took place one of them transmitter, critical induction will never take place another transmitter.Like this, the critical pulse signal just only may produce in a transmitter.The signal of two transmitters is connected with the input terminus that suppresses circuit, suppresses circuit and is made of rest-set flip-flop, according to the characteristic of rest-set flip-flop and truth table as can be known, has only when two input signals enter same level, and rest-set flip-flop is overturn; When two input signals became varying level (00/11 → 01 or 00/11 → 10) by same level (00 or 11), AND circuit 12 all can not make rest-set flip-flop 14 upsets with the output of OR circuit 13.When pulse wheel stops moment, when the level of two transmitters 7 is identical, have only a transmitter may have critical shock pulse, there are what critical shock pulses all can not make rest-set flip-flop 14 upsets, just can not produce unnecessary error pulse yet.When pulse wheel stops moment, the level of two transmitters is not simultaneously, also have only a transmitter may have critical shock pulse, no matter what critical shock pulses are arranged this moment, all can only make rest-set flip-flop 14 upsets once, the current pulse edge of record is effectively, also just can not produce unnecessary error pulse.The pulse that two transmitters send is consistent with the level of the input pulse of no critical pulse through the output signal that suppresses behind the circuit, and critical inductive impulse is suppressed.The slot control machine pulse signal of only need sampling does not contain critical inductive impulse in this signal, only contain effective pulse.When the rotary pulse edge only produces in a transmitter, also will be suppressed.The number of slot control machine record effective impulse rising edge and falling edge can calculate the height that anode moves.After using this circuit, when anode moves, do not need the strictness of opening/carry out between the stopping time of software paired pulses sampling to control.Even do not need software to come paired pulses sampling carrying out start-stop.Logical circuit and two transmitters (or the two constitutes an assembly) and induction wheel are combined by the mode of this patent, promptly constituted the anodic pulse producer of no critical inductive impulse.

Essential implementation of the present utility model:

Assemble by Fig. 2 and Fig. 3, connect surge generator and suppress circuit card, connect pull-up resistor with signal wire; Connect power supply; Manually the rotary inductive wheel confirms that the signal lamp on the transmitter is bright; Use the simulation rotating machinery make the surge generator rotation (~ 10pulse/sec), and suppress circuit output signal with the volt ohm-milliammeter test, confirm that output voltage near about 1/2 of voltage of supply, makes the pulse signal dutycycle near 50%; If signal dutyfactor too far should be revised the sector width of pulse wheel near distance 50%.Mechanical organ will guarantee certain precision in the process of processing, the gap is little between axle, hole, but wants flexibly.

Claims

[claim 1] a kind of device that suppresses critical pulse miscounting, it is characterized in that: it comprises housing (1), be provided with in the housing (1) by set ring (2) and the localized rotating shaft of cover plate (3) (4), be fixed with induction wheel (5) in the rotating shaft (4), induction wheel (5) is provided with two or more gear teeth (6), the corresponding different gear teeth (6) are provided with two transmitters (7) outside housing (1), two transmitters (7) are connected to the input terminus that suppresses circuit (8) respectively, and the output terminal that suppresses circuit (8) is connected to counter (9).
The device of [claim 2] inhibition critical pulse miscounting according to claim 1, it is characterized in that: (7) one of described two transmitters face the edge that induction wheel (5) is gone up the gear teeth (6), and another faces the middle part that induction wheel (5) is gone up the gear teeth (6).
The device of [claim 3] inhibition critical pulse miscounting according to claim 1 is characterized in that: described inhibition circuit (8) is installed on slot control machine (10) or the groove in the terminal box (11).
The device of [claim 4] inhibition critical pulse miscounting according to claim 1, it is characterized in that: described inhibition circuit (8) is made of AND circuit (12), OR circuit (13) and RS triggering circuit (14) and peripheral components, the Shu Ru Duan And of AND circuit (12) and OR circuit (13) is connected two transmitters (7) respectively after connecting, the output terminal of AND circuit (12) and OR circuit (13) is connected with two input terminuss of RS triggering circuit (14) respectively, the output terminal linkage counter (9) of RS triggering circuit (14).
The device of [claim 5] inhibition critical pulse miscounting according to claim 4 is characterized in that: the model of described AND circuit (12) is MC14081, and the model of OR circuit (13) is MC14071, and the model of RS triggering circuit (14) is NE555.