CN1071702C - Error judgement method for elevator car position detector - Google Patents

Abstract

To make judgement about the failure of an elevator car position detector by making judgement about the abnormal state of the detector whenever the travel of the detector occurs across the plate of each layer. An off-time(FT) is taken as a minimum time for an elevator car(EL) to escape an arbitrary layer, and an on-time(NT) taken as a time for the EL to pass the arbitrary layer. In addition, timing for the FT is initially set at 28 periods. When the EL does not escape a position detector(SE) at a step 5, one period is subtracted from the FT to generate 27 periods at a step 10. As the NT is not equal to zero, the FT is shortened, until the escape of the EL from a departure layer plate and when the FT is equal to zero at a step 11, an alarm is generated at a step 19. Also, when the SE enters the second plate and the maximum value of a plate travel time between the departure layer and an arrival layer is seven, an alarm is generated at a step 19, provided that the value of the NT is found larger than seven at a step 6. When the SE passes the second plate and the value of the NT is equal to 1 at a step 16, an alarm is generated. In this way, the existence of the abnormal state of the SE is judged at every passage thereof across the plate of each layer.

Description

The error judgement method that is used for the elevator cage position detector

The present invention relates to a kind of error judgement method that is used for the elevator cage position detector, relate in particular to a kind of improved error judgement method that is used for the elevator cage position detector, it can judge the error of position detector more accurately, it is the current location that detects elevator cage on the cab mobile route of each floor for the position according to the sensing plate that is provided with that this position detector is provided, therefore, when the position detector of mistake passes through sensing plate, by judging the error of position detector, the operator of elevator device just can more easily detect the elevator error.

Fig. 1 is the view of the traditional elevator operating control device of expression.

As shown in the figure, be provided with motor 17 so that operation power to be provided to system element.A pulley 15 is by motor 17 driven in rotation.Elevator cage 11 links to each other with pulley 15 by wirerope, and moves up and down along with the rotation of pulley 15.Be provided with a counterweight 16 with balance elevator cage 11.Impulse deviser 18 produces pulse, and this pulse is directly proportional with the revolution of motor 17.Be provided with the pulse count that a counting machine 19 is produced by impulse deviser 18 with metering and output.On the top of elevator cage 11 position detector 13 is housed, it is used to detect the position of the sensing plate 12 that is provided with on the elevator cage mobile route.Be provided with the count value that a controller 20 is used for operational counter 19, the miles of relative movement of calculating elevator cage 11, control system and judge the error of position detector 13 according to the testing result of position detector 13.Be provided with a read out instrument that has warning light 21 and spurious signal lamp 22, be used for the position detector 13 output error judged results of slave controller 20.

Fig. 2 is the view of the controller architecture in the presentation graphs 1.

As shown in the figure, be provided with random-access memory (ram) 28, be used to store the floor position data of elevator.Be provided with read-only memory (ROM) (ROM) 27, be used to store operation procedure.Being provided with input interface 25 and output interface 26 is used for carrying out quantitative data input/output function with outer connecting element.Be provided with a central processing unit (CPU) 24 and be used for processing data and output interface 26 output results by receiving the signal that transmits from RAM28, ROM27 and input interface 25.

Be illustrated referring now to the operation of accompanying drawing traditional elevator operating control device.

Pulley 15 is driven by motor 17, and elevator cage 11 moves to predetermined floor.Impulse deviser 18 produces pulse, and this pulse is directly proportional with the revolution of motor 17.Counting machine 19 metrical pulse numbers and to these pulse counts of controller 20 output.Controller 20 calculates the miles of relative movement of elevator cage 11 according to pulse count, miles of relative movement compared with the miles of relative movement of elevator cage 11 in being stored in ROM27, and output signal, thereby the judgement elevator cage is opened wherein.

In addition, in 11 operating periods of elevator cage, when the location matches of the sensing plate 12 on the position of the position detector 13 that is arranged on elevator cage 11 tops and the cab mobile route that is arranged on each floor, control signal " OS " is output to controller 20.In controller 20, control signal " OS " transmits to CPU24 by input interface 25.Here, when control signal was connected, CPU24 judged elevator cage 11 and arrives desired floor, and for making the elevator cage door open output signal.

But if the miles of relative movement of elevator cage 11 is out in one's calculation, perhaps position detector 13 is made mistakes, and the door of elevator cage 11 will be opened mistakenly in the desired location, and this can produce major accident for the passenger in the elevator cage.

In order to overcome the problems referred to above, in industry, introduced the another kind of error judgment device that is used for the traditional elevator position detector.

Fig. 3 is the constructional drawing of the error judgment device of expression traditional elevator position detector.

As shown in the figure, be connected with position detector 36, be used for current location according to the position probing elevator cage 11 of sensing plate 12.Connected position operation device 31, be used for position according to the rotating operation elevator cage 11 of motor 17.Connected error operations detector 32, be used for stopping this section time gap and detecting faulty operation from decelerating to according to elevator cage.Connected Distance Remaining handling device 33, be used for operating result according to position operation device 31 and detect the expire Distance Remaining of watchtower layer of elevator.Be provided with interval detector 34, be used for operating result according to Distance Remaining handling device 33 come operation room every, this is based on the difference of the detecting operation and the non-operating state of position detector at interval.Connected error detecting apparatus 35, be used for checking the testing result of position detector 36 and the error of detection position detector 36 according to the testing result of position detector 34.

Referring now to Fig. 4 the operation of traditional elevator position detector is illustrated.

At first, behind the expectation floor of having selected elevator cage 11, the numerical value of position operation device 31 calculation expectation floor from numerical tabular, this numerical tabular comprises the distance value of the layer to layer of each floor that is stored among the ROM27.Distance Remaining handling device 33 calculates Distance Remaining according to layer to the distance value of interlayer and the difference between lift car 11 current locations.Calculate the miles of relative movement of elevator cage 11 according to motor 17, impulse deviser 18, counting machine 19, reduce Distance Remaining then length by length.

In addition, from the numerical tabular of ROM27, corrected, controlled the speed of elevator cage 11 like this, elevator cage 11 is moved towards predetermined floor with the Distance Remaining corresponding reference speed command that is reducing.

Simultaneously, the elevator floor position data is deposited among the RAM28, because when noise and ON/OFF elevator power supply, the influence of the error that in the impulse deviser 18 that has the coder (not shown), produces, position data and be stored between the data among the RAM28 and may produce a predetermined difference value.Here, this difference is called as and selects not match (selector mismatch).Because mistake is provided with the elevator cage arrival floor, or the wrong current location of having imported elevator cage 11, when taking place to select not match, will calculate Distance Remaining with leading to errors.

Therefore, in step S41 and S42, whether error operations detector 32 detects selects not match.When selecting not match, in step S47, ignore the error judgment of position detector 13; When wave band just often, position detector 13 carries out error judgment.

That is to say, in step S43, calculate Distance Remaining.For example, if in step S44, Distance Remaining is in the scope from bottom 1050mm to 1350mm, judge in step S45 then whether control signal is connected, when control signal is connected, in step S46, position detector 13 has been judged as error, and this can cause elevator to operate.

As mentioned above, traditional elevator device directly calculates lift car 11 and the distance of selecting floor gap according to Distance Remaining; But the condition that is not in on-state based on position detector 13 in the 1050-1350mm scope error that judges is so error judgment may be left in the basket.

In addition, because before arriving the expectation floor, error judgment is only carried out in the detection spacing of 1050-1350mm, so carry out error detection, the error judgment that can lead to errors except above-mentioned spacing.

Therefore, an object of the present invention is to provide a kind of error judgement method that is used for elevator car position detector, it has overcome the problems of the prior art.

Another object of the present invention provides a kind of improved error judgement method that is used for elevator car position detector, it can judge the error of position detector more accurately, it is the current location that detects elevator cage on the cab mobile route of each floor for the position according to the sensing plate that is provided with that this position detector is provided, therefore, when the position detector of mistake passes through sensing plate, by judging the error of position detector, the operator of elevator device just can more easily detect the elevator error.

In order to achieve the above object, the invention provides a kind of error judgement method that is used for the elevator position detector, it comprises: the first step, at lift car from starting after floor starts, when the position detector of lift car does not leave the sensing plate that starts floor in first schedule time, give the alarm; In second step, after position detector enters current floor and expects the sensing plate scope of the predetermined floor between the floor, when position detector leaves sensing plate in second schedule time, give the alarm; In the 3rd step,, give the alarm when for making position detector enter the sensing plate scope in second step and leaving the 3rd schedule time of required time ratio in short-term from there; The 4th step, when elevator car arrives expectation floor, the number of floor levels that relatively more default number of floor levels and lift car move, and when having predetermined difference value between the two, give the alarm.

Other advantages of the present invention, purpose and feature will more clearly show from following explanation.

From following detailed and the accompanying drawing that only provides in the legend mode, will understand the present invention more fully, and this is not limitation of the invention, wherein:

Fig. 1 is the scheme drawing of the traditional elevator operating control device of expression;

Fig. 2 is the scheme drawing of presentation graphs 1 middle controller structure;

Fig. 3 is the structural representation of the error judgment device of expression traditional elevator position detector;

Fig. 4 is the diagram of circuit of traditional elevator position method of inspection;

Fig. 5 is according to the control signal mode chart that is detected and passed to central processing unit (CPU) by position detector of the present invention;

Fig. 6 is the diagram of circuit according to elevator progress control method of the present invention;

Fig. 7 is the diagram of circuit according to subprogram shown in Figure 6 of the present invention.

Now with reference to accompanying drawing foundation elevator progress control method of the present invention is illustrated.

Here, by using the structure implementation basis of the present invention elevator progress control method identical with traditional error detecting apparatus shown in Figure 3.

When the user pressed required floor button, floor call information just was stored among CPU24 or the RAM28 by input interface 25.

CPU24 is to being stored in data among the RAM28 and handling and providing one to drive order by output interface 26 to motor 17.Till when the control signal of importing by input interface 25 is processed before processed signal output, program runtime is 50ms.

According to driving order, lift car 11 is driven and moves to required floor.When lift car 11 when required floor moves, the position detector 13 that is contained in lift car 11 tops detects the position of sensing plates 12.

Fig. 5 is when lift car moves up, and is detected and be applied to the control signal mode chart of central processing unit (CPU) by position detector.

As shown in the figure, when the upper position detector 131 of position detector 13 entered the scope of sensing plate, control signal " OS " became high level, and when portion position detector 132 left the sensing plate scope instantly, control signal " OS " became low level.Therefore, by the time that sensing plate experienced, just determined the width 1F of high-level control signal " OS " according to position detector 13.

Therebetween, lift car quickens in start-up mode, and moves at full speed after start-up mode, slows down in the elevator car arrives pattern again.Therefore, wideer at high-level control signal 1F that starts floor and expectation floor place and 4F than high- level control signal 2F and 3F in the predetermined space that is starting between floor and the expectation floor.

Lift car 11 is the same with driving, the time that obtains when position detector 13 passes through to start the floor sensing plate as described below.

Behind the operation lift car, lift car 11 will speed up 0.8 second, after this reached certain value.Suppose that acceleration/accel is 0.8m/s ², can draw by following formula when the time " t " of position detector 13 by the time apart from the startup floor sensing plate of bottom 2500mm, have a predetermined relationship between the length " S " of the end of acceleration/accel in this equation " a " and sensing plate, $s=\frac{1}{2}a{t}^2=\frac{v^2}{2a},$ Thereby $t=\sqrt{\frac{2s}{a}}=\sqrt{\frac{2\×0.175}{0.8}}=0.661438---\left(1\right)$

When lift car 11 normal operations, start back 0.66 second at lift car 11 from starting floor, after about 0.7 second, position detector is by starting the sensing plate of floor.Therefore, in order to have operational stability, be provided with by doubling 0.7 second resulting new time t1.That is to say, if position detector 13 can not be by starting the sensing plate of floor in 1.4 seconds, the CPU24 of controller 20 will send an alarm signal, make the warning light 21 of read out instrument 23 luminous, thereby warn out a predetermined faulty operation be arranged in position detector 13.

After position detector 13 is by the sensing plate that starts floor, will obtain the time of position detector 13 by following method by the sensing plate of next floor.

When lift car 11 moves under full speed, that is, when under 4m/s, moving, can obtain the time t2 of position detector 13 by the sensing plate of next floor by following formula, wherein, the length of position detector 13 is 0.35m. $t2=\frac{0.35m}{4m/s}=0.0875s---\left(2\right)$

Therefore, the time t2 of normal operation of lift car 11 and the sensing plate by next floor is set to the shortest time.

In addition, before lift car 11 moved at full speed, lift car can be with 0.8m/s ²Acceleration operation and the sensing plate by next floor.In this case, passage period is slow more a lot of than the 0.0875 second time that is known as t2.After the speed v of lift car during by next floor sensing plate drawn by formula 3, passage period was drawn by formula 4 given below. $v=\sqrt{2\mathrm{as}}=\sqrt{2*0.8*2.5}=2m/s---\left(3\right)$ $t=\frac{0.35m}{2m/s}=0.175s---\left(4\right)$

When sensing plate by next floor of position detector 13, be set to maximum time t3 by the 0.35 second time that 0.175 second time t is doubled gained.

Therefore, enter the scope of sensing plate of next floor when position detector 13 after, if position detector 13 before time t2 by sensing plate, if perhaps after elapsed time t3, position detector 13 does not also leave sensing plate, will mean that lift car 11 can't normally move.Therefore CPU24 lights the warning light 21 of read out instrument 23, and the operator of elevator device just can notice like this a predetermined mistake in position detector 13.

In addition, when warning light 21 ON/OFF several, CPU24 can make the spurious signal lamp 22 of read out instrument 23 light, and the operator just can notice like this a predetermined mistake in position detector 13.

Referring now to Fig. 6 foundation error judgement method of the present invention is described in detail.

Value OFFTIME (hereinafter will be illustrated) expression is left the required maximum time of sensing plate that starts floor in order to make lift car 11, promptly, it is represented with time t1, value ONTIME represents after lift car starts from the startup floor, in order to make lift car 11 by the predetermined needed time of floor.

At first, when lift car 11 does not move, because elevator is not in High-Speed Automatic operational mode, so carry out step S1.That is, in step S15, value DZSU is initialized to " 0 ", and in step S18, value ONTIME is initialized to " 0 ", is initialized to 28 circulations corresponding to the time t1 among the step S18.

After this, elevator normally moves, and lift car 11 is handled.That is, because the current running state of elevator is to be in High-Speed Automatic operational mode, so carry out step S1 and step S2, S3 and S4.When position detector 13 does not leave current startup floor sensing plate, do not carry out step S5.In step S10, from value OFFTIME, deduct once circulation, then be worth OFFTIME and become 27 circulations.In addition, in step S11, if value OFFTIME does not satisfy " 0 ", then this program will be returned.

Because leave till the sensing plate that starts floor up to position detector 13, said process will repeat,, and in step S11, when OFFTIME on duty becomes " 0 ", then carry out step S19 so value OFFTIME reduces.In this case, mean that position detector 13 does not pass through to start the sensing plate of floor in time t1.Therefore, as shown in Figure 7, in step S71, value Err increases with step-length " 1 ", and in step S74, shows alarm signal through step S72.

When position detector 13 entered in the scope of second sensing plate (not shown), in step S6, value ONTIME and " 7 " were relatively.Here, value " 7 " expression is at the maximum passage period that starts the predetermined sensed plate between floor and the expectation floor, that is, it represents time t3.In step S7, value ONTIME " 0 " increases with step-length " 1 ", and carries out step S8.In step S9, value DZSU becomes " 1 ".Here, except the sensing plate that starts floor, no matter position detector 13 enters remaining which sensing plate, value DZSU all increases with step-length " 1 ".That is, its represents the floor number that lift car 11 passes through.

After this, when position detector 13 does not pass through second sensing plate,, greater than 7 o'clock, in step S74, give the alarm up to value ONTIME through step S6 execution in step S19.In this case, position detector 13 does not pass through sensing plate in maximum time t3.

When position detector 13 leaves second sensing plate, do not carry out step S3.In step S16, whether judgment value ONTIME is " 1 ".As judged result, when ONTIME on duty is not " 1 ", that is, ONTIME on duty carries out step S18 during greater than " 1 ".When ONTIME on duty is " 1 ", carry out step S17, and in step S74, show alarm.This program representation the sensor passage period also shorter than the minimum time t2 that is used for by sensing plate.

At last, when position detector 13 enters in the sensing plate scope of expecting floor, carry out step S4.In step S12, be provided with start floor and expectation floor gap difference as a new value FL, and judgement whether subtract the value of " 1 " gained from value FL identical with value DZSU.A result is, and is inequality if both are worth, and just carries out S14, and show alarm signal in step S74.Another result is will return if both are worth identical this program.Here, the startup floor of step S12 and expectation floor are stored in the value representation among the RAM28 of controller 20 when pressing the lift car call value as the user.Value DZSU represents every floor number of layers that position detector 13 passes through.

In step S72 as shown in Figure 7, position detector 13 is not by starting the sensing plate of floor.If said procedure outnumber 5, with execution in step S72, and in step S73, show alarm signal.

As mentioned above, lift car directly is set from starting the normal time that floor starts and pass through each floor according to the error judgement method that is used for elevator car position detector of the present invention, relatively enter the sensing plate scope of each floor and from the time of there when leaving when position detector, and judge the error of the position probing of elevator device.

Although for illustration purpose discloses the preferred embodiments of the present invention, under the scope and spirit that do not break away from claim of the present invention, those skilled in the art can make multiple improvement, variation and replacement form.

Claims (8)

1, be used for the error judgement method of elevator car position detector, may further comprise the steps:

The first step, when the position detector of lift car does not leave the sensing plate that starts floor in first schedule time, gives the alarm after starting the floor startup at lift car;

In second step, after position detector enters current floor and expects the sensing plate scope of the predetermined floor between the floor, when position detector leaves sensing plate in second schedule time, give the alarm;

In the 3rd step,, give the alarm when in order to make position detector enter the sensing plate scope in second step and to leave the 3rd schedule time of required time ratio in short-term from there;

The 4th step, when elevator car arrives expectation floor, the number of floor levels that relatively more default number of floor levels and lift car move, and when having predetermined difference value between the two, give the alarm.

2, the method for claim 1 also comprises: in the 5th step, when the alarm number of times surpasses predetermined number, give the alarm.

3, method as claimed in claim 2, wherein, described predetermined number is five (5).

4, the method for claim 1, wherein described first schedule time is for making the twice of elevator position detector by the sensing plate required time of startup floor.

5, method as claimed in claim 4, wherein, described is 0.7 second for making the elevator position detector by the required time of sensing plate that starts floor.

6, the method for claim 1, wherein described second schedule time is after lift car starts from the startup floor and before moving at full speed, passes through the twice of the sensing plate required time of next floor in order to make position detector.

7, method as claimed in claim 6 wherein, is 0.175 second for making position detector by the required time of the sensing plate of next floor.

8, the method for claim 1, wherein described the 3rd schedule time is when lift car moves at full speed, for position detector is passed through neither start the predetermined required time of floor sensing plate that floor neither be expected floor.

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