CN111675065B - Power supply detection method, system, device, equipment and storage medium of elevator - Google Patents
Power supply detection method, system, device, equipment and storage medium of elevator Download PDFInfo
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- CN111675065B CN111675065B CN202010514473.9A CN202010514473A CN111675065B CN 111675065 B CN111675065 B CN 111675065B CN 202010514473 A CN202010514473 A CN 202010514473A CN 111675065 B CN111675065 B CN 111675065B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
- B66B7/1207—Checking means
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Abstract
The invention discloses a power supply detection method, a system, a device, equipment and a storage medium of an elevator, wherein the power supply detection method of the elevator comprises the following steps: when the lift car runs in the well, detecting the total current value flowing between a current collector and guide rails, wherein the guide rails are arranged in the well and used for providing electric energy, the current collector is arranged on the lift car and electrically connected with the guide rails, at least two guide rails are arranged in the well, and at least one current collector corresponding to each guide rail is electrically connected with the guide rails; detecting a total voltage value between the current collector and the guide rail; calculating a total resistance value of a resistance formed by contact between the collector and the guide rail according to the total current value and the total voltage value; and detecting the power supply state of the guide rail for supplying power to the current collector according to the total current value and the total resistance value. The problem of artifical surface to current collector and guide rail overhaul the maintenance, need consume a large amount of time and human cost to and the difficult condition of discovering of part is missed the inspection by the manual work is solved, the effectual security that improves the elevator operation.
Description
Technical Field
The embodiment of the invention relates to an elevator power supply technology, in particular to a power supply detection method, a power supply detection device, power supply equipment and a storage medium of an elevator.
Background
Elevators are normally powered by a trailing cable, but as the number of bends of the cable increases, the cable is prone to failure. And when the floor is higher, the cable conductor is longer relatively, and in the elevator operation process, the weight increase of cable also brings the consumption of energy.
In the prior art, a mode of supplying power through a guide rail is provided for the easy damage and the energy waste of cable power supply. The power supply is loaded on the guide rail, and the current collector is arranged on the car of the elevator, so that the current collector can take electricity from the guide rail to supply power for electric equipment in the car in the sliding process of the current collector on the guide rail, and the material cost and the energy loss are reduced. In the mode, because the contact of the current collector is easy to wear and the guide rail is easy to rust or is covered by foreign matters, a large amount of manual resources are consumed to overhaul and maintain the current collector and the guide rail every day, and the safe operation of the elevator is ensured.
The surface of current collector and guide rail is overhauled and maintained through the manual work, not only need consume a large amount of time and human cost to the elevator overhauls under non-operating condition, and some circumstances are difficult for being discovered by maintainer, have reduced the security of elevator operation.
Disclosure of Invention
The invention provides a power supply detection method, a power supply detection system, a power supply detection device, power supply equipment and a power supply storage medium of an elevator, which are used for detecting the power supply condition of the elevator in the working state of the elevator and ensuring the running safety of the elevator.
In a first aspect, an embodiment of the present invention provides a power supply detection method for an elevator, including:
when a car runs in a hoistway, detecting the total current value flowing between a current collector and a guide rail, wherein the guide rail is arranged in the hoistway and used for providing electric energy, the current collector is arranged on the car and electrically connected with the guide rail, at least two guide rails are arranged in the hoistway, and at least one current collector is arranged corresponding to each guide rail and electrically connected with the guide rail;
detecting a total voltage value between the current collector and the guide rail;
calculating a total resistance value of a resistance formed by contact between the collector and the guide rail according to the total current value and the total voltage value;
and detecting the power supply state of the guide rail for supplying power to the current collector according to the total current value and the total resistance value.
Optionally, the detecting a total voltage value between the current collector and the guide rail includes:
detecting a voltage applied to the rail as a supply voltage;
detecting a voltage of a load connected to the collector as a load voltage;
and calculating the difference value of the power supply voltage and the load voltage to obtain the total voltage value between the current collector and the guide rail.
Optionally, the calculating a total resistance value of a resistance formed by contact between the current collector and the guide rail according to the total current value and the total voltage value includes:
acquiring the sum of the internal resistance values of the guide rails between the current collector and the power supply on the side, close to the power supply of the guide rails, of each guide rail;
calculating the ratio of the total voltage value to the total current value to obtain a first resistance value;
and calculating the difference value of the first resistance value and the sum of the internal resistance values as the total resistance value of the resistance formed by the contact between the current collector and the guide rail.
Optionally, the detecting, according to the total current value and the total resistance value, a power supply state in which the guide rail supplies power to the current collector includes:
if the total current value is zero, judging that the power supply state of the position where the total current value is detected is abnormal;
if the total current value is not zero, comparing the total resistance value with a preset first range value;
if the total resistance value falls into the first range value, judging that the power supply state of the position where the total current value is detected is normal;
and if the total resistance value exceeds the first range value, judging that the power supply state of the position where the total current value is detected is abnormal.
Optionally, an energy storage device is arranged on the car, and the energy storage device can provide electric energy for the car;
the method further comprises the following steps:
if the total current value is zero, switching the energy storage device to a power supply state for supplying power to the car;
if the total current value is not zero, comparing the total voltage value with a preset second range value;
if the total voltage value exceeds the second range value, switching the energy storage device to a power supply state for supplying power to the car;
and if the total voltage value falls into the second range value, switching the energy storage device to a charging state.
Optionally, the method further includes:
counting a first time when the total current value is continuously zero;
comparing the first time with a preset first threshold value;
if the first time is greater than or equal to the first threshold value, executing alarm operation;
counting a second time for continuously supplying power by using the energy storage device;
comparing the second time with a preset second threshold value;
and if the second time is greater than or equal to the second threshold value, executing alarm operation.
Optionally, the guide rails include a first guide rail and a second guide rail, and the first guide rail and the second guide rail are symmetrically disposed in the hoistway; the current collectors include a first current collector, a second current collector, a third current collector, and a fourth current collector; the first current collector and the second current collector are arranged on one side, close to the first guide rail, of the car at intervals, the first current collector is located on one side, close to a power supply for supplying power to the guide rail, the first current collector and the second current collector are both electrically connected with the first guide rail, and the first current collector and the second current collector are connected in parallel; the third current collector and the fourth current collector with first current collector and second current collector symmetry set up in the car is close to one side of second guide rail, the third current collector is located and is close to for the power one side that the guide rail provided the electric energy, third current collector and fourth current collector all with the second guide rail electricity is connected, the third current collector with fourth current collector parallel connection.
Optionally, the detecting a total current value flowing between the current collector and the guide rail includes:
detecting a first current value flowing through the first current collector;
detecting a second current value flowing through the second current collector;
detecting a third current value flowing through the third current collector;
detecting a fourth current value flowing through the fourth current collector;
and accumulating the first current value and the second current value or accumulating the third current value and the fourth current value to obtain a total current value between the collector and the guide rail.
Optionally, the calculating a total resistance value of a resistance formed by contact between the current collector and the guide rail according to the total current value and the total voltage value includes:
obtaining a first internal resistance value of the first rail between the first current collector and the power source;
obtaining a second internal resistance value of the second rail between the third current collector and the power source;
accumulating the first internal resistance value and the second internal resistance value to obtain the sum of the internal resistance values of the guide rails between the current collector and the power supply on the side, close to the power supply, of each guide rail;
calculating the ratio of the total voltage value to the total current value to obtain a first resistance value;
and calculating the difference value of the first resistance value and the sum of the internal resistance values as the total resistance value of the resistance formed by the contact between the current collector and the guide rail.
In a second aspect, an embodiment of the present invention further provides a power supply detection device for an elevator, including:
the current detection module is used for detecting the total current value flowing between the current collector and the guide rail;
the voltage detection module is used for detecting a total voltage value between the current collector and the guide rail;
a total resistance value calculation module for calculating a total resistance value of a resistance formed by contact between the current collector and the guide rail according to the total current value and the total voltage value;
and the power supply detection module is used for detecting the power supply state of the guide rail for supplying power to the current collector according to the total current value and the total resistance value.
In a third aspect, an embodiment of the present invention further provides a power supply detection device for an elevator, where the device includes a memory, a processor, and a computer program stored in the memory and running on the processor, where the processor implements the power supply detection method for an elevator as described above when executing the program.
In a fourth aspect, an embodiment of the present invention further provides a storage medium, on which a computer program is stored, which when executed by a processor implements the power supply detection method for an elevator as described above.
Compared with the prior art that the surfaces of the current collector and the guide rail are manually overhauled and maintained by an overhaul worker after the elevator stops running, the technical scheme of the embodiment of the invention calculates the total resistance value of the resistance formed by the contact between the current collector and the guide rail by detecting the total current value and the total voltage value flowing between the current collector and the guide rail in the working process of the elevator, thereby judging the power supply state of the guide rail for providing electric energy for the current collector according to whether the total current is zero or not and the size and the change of the total resistance value. The problem of artifical surface to current collector and guide rail overhaul the maintenance, need consume a large amount of time and human cost to and the difficult condition of discovering of part is by artifical hourglass inspection is solved, reached and made the detection to the condition that the guide rail provides the electric energy for the current collector under elevator operating condition, reduced the detection cost and avoided the difficult condition of discovering of part to be omitted, thereby the effectual security that improves elevator operation.
Drawings
Fig. 1 is a flow chart of a power supply detection method of an elevator in a first embodiment of the invention;
fig. 2a is a flow chart of a method for detecting power supply of an elevator in the second embodiment of the present invention;
fig. 2b is a structural view of an elevator in the second embodiment of the present invention;
fig. 3 is a configuration diagram of an elevator power supply detection device in a third embodiment of the present invention.
Fig. 4 is a structural diagram of a power supply detection device of an elevator in a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a power supply detection method for an elevator according to an embodiment of the present invention, where the present embodiment is applicable to a case where a guide rail is used to supply power to the elevator, the method may be executed by a power supply detection device for an elevator, and the power supply detection device for an elevator may be implemented by hardware and/or software, and specifically includes the following steps:
step S110, detecting a total current value flowing between the collector and the guide rail when the car is running in the hoistway.
The elevator comprises a car, a guide rail, a current collector, a lift car and a lift car, wherein the guide rail is arranged in the lift car and used for providing electric energy, the current collector is arranged on the lift car and electrically connected with the guide rail, at least two guide rails are arranged in the lift car, and at least one current collector is arranged corresponding to each guide rail and electrically connected with the guide rail.
In this embodiment, an elevator refers to a permanent transport equipment serving several specific floors in a building, the cars of which travel in at least two rows of rigid orbital motion perpendicular to the horizontal or inclined at an angle of less than 15 ° to the vertical. The car is the elevator assembly that transports passengers and cargo and is the working part of the elevator. The shaft of the elevator is the space in which the car and the counterweight or (and) the cylinder plunger move, and this space is formed by the shaft wall, the floor and the ceiling. The current collector is a main device for collecting electric energy at the current collecting side of the lift car, and the current collector is in sliding contact with the guide rail through the current collecting brush to directly conduct the electric energy to electric equipment of the lift car, so that the mobile power supply of the system is realized.
The guide rail is installed on a side wall of the hoistway and is made of a conductor. The power supply is connected to the guide rail to provide electric energy for the guide rail. The car is provided with a current collector corresponding to the guide rail, and the current collector slides on the surface of the guide rail to pick up electric energy from the guide rail for electric equipment in the car.
In this embodiment, the collector is in series relationship with the guide rail as the car is connected to the guide rail by the collector, which draws power from the guide rail. Therefore, in the present embodiment, the total current value between the collector and the guide rail can be obtained by detecting the current flowing through the guide rail, or by detecting the current flowing through the collector. Specifically, the total current value between the collector and the guide rail may be obtained by providing a current detection circuit on the guide rail or providing a current detection circuit between the collector and the electric equipment of the car.
And step S120, detecting the total voltage value between the collector and the guide rail.
In this embodiment, the detected total voltage value between the current collector and the guide rail refers to the voltage divided by the contact position of the current collector and the guide rail when the car takes electricity from the guide rail through the current collector. Specifically, the total voltage value between the current collector and the rail can be directly measured by arranging a voltage measuring circuit, or the supply voltage of the guide rail and the voltage of the electric equipment of the car can be detected in an indirect detection mode, and then the total voltage value between the current collector and the rail can be obtained through detection.
Step S130, calculating a total resistance value of the resistance formed by the contact between the collector and the rail according to the total current value and the total voltage value.
In this embodiment the car is powered by a current collector in sliding contact with the guide rail, picking up electrical energy from the guide rail. In the process of picking up electric energy, the current collector and the guide rail are in a non-integral structure, and a resistance, also called a contact resistance, is formed at the position where the current collector is in contact with the guide rail. And factors affecting the magnitude of the total resistance value are mainly represented by poor contact between the collector and the guide rail. Specifically, the presence of rust or foreign matter covering the contact surface of the guide rail and the current collector, or the wear or even damage of the contact of the current collector, will result in poor contact between the current collector and the guide rail. And is expressed in the form that the total resistance value between the collector and the rail becomes large.
The total current value and the total voltage value between the collector and the guide rail are detected in step S110 and step S120, respectively, and according to ohm' S law, the total resistance value of the resistance formed by the contact between the collector and the guide rail can be calculated.
And step S140, detecting the power supply state of the guide rail for supplying power to the current collector according to the total current value and the total resistance value.
The power supply state of the guide rail for supplying power to the collector comprises: the surface of the guide rail is rusted, and the total resistance value between the current collector and the guide rail is increased, so that the voltage drop of power supply to the car is large, and the normal work of electric equipment of the car is influenced; the surface of the guide rail is covered by a non-conductive substance, at the moment, the contact between the current collector and the guide rail is blocked, so that the electric energy which cannot be transmitted from the guide rail by the current collector is supplied to electric equipment, at the moment, the current collector and the guide rail are separated, a loop cannot be formed between the current collector and the guide rail, the current flowing between the current collector and the guide rail is zero, and the electric equipment of the car cannot obtain the electric energy; the lift car vibrates in the running process, so that the contact between the current collector and the guide rail is good and bad, and the total resistance value between the current collector and the guide rail fluctuates greatly, so that the voltage for supplying power to the electric equipment fluctuates greatly, and the electric equipment cannot work normally; the collector is worn seriously, at which time the contact of the collector with the guide rail becomes poor, and it appears that the total resistance value between the collector and the guide rail is increased and stabilized within a certain range. Therefore, in the embodiment of the present invention, the power supply state of the current collector provided with power by the guide rail is mainly obtained by determining whether the total current value is zero and by determining the magnitude of the total resistance value changes.
In this embodiment, since the current collector is used to pick up the electric energy from the guide rail and provide the electric energy for the electric equipment in the car, and the power supply, the guide rail, the current collector and the electric equipment form a complete loop, a current will flow between the current collector and the guide rail, and thus, whether an open circuit condition exists between the current collector and the guide rail can be determined according to the existence of the current between the current collector and the guide rail. Since the current collector is used to pick up electric energy from the guide rail while the current collector is in sliding contact on the guide rail, if rust or covered foreign matter is present on the contact surface of the guide rail and the current collector, or the contact of the current collector is worn or even damaged, the total resistance value between the current collector and the guide rail will be increased. If the car vibrates during running, the total resistance value between the current collector and the guide rail fluctuates greatly as shown on the current collector and the guide rail. Therefore, in the embodiment of the invention, the magnitude of the total resistance value between the collector and the guide rail can be calculated by detecting the current value and the voltage value flowing between the collector and the guide rail, so that the power supply state of the guide rail for supplying power to the collector can be judged according to the current value and the total resistance value.
Compared with the prior art that the surfaces of the current collector and the guide rail are manually overhauled and maintained by an overhaul worker after the elevator stops running, the technical scheme of the embodiment of the invention calculates the total resistance value of the resistance formed by the contact between the current collector and the guide rail by detecting the total current value and the total voltage value flowing between the current collector and the guide rail in the working process of the elevator, thereby judging the power supply state of the guide rail for providing electric energy for the current collector according to whether the total current is zero or not and the size and the change of the total resistance value. The problem of artifical surface to current collector and guide rail overhaul the maintenance, need consume a large amount of time and human cost to and the difficult condition of discovering of part is by artifical hourglass inspection is solved, reached and made the detection to the condition that the guide rail provides the electric energy for the current collector under elevator operating condition, reduced the detection cost and avoided the difficult condition of discovering of part to be omitted, thereby the effectual security that improves elevator operation.
Example two
Fig. 2a is a flowchart of a power supply detection method for an elevator according to a second embodiment of the present invention, and fig. 2b is a structural diagram of an elevator according to a second embodiment of the present invention.
The power supply detection method described in this embodiment includes the following steps:
step S201, when the car is running in the hoistway, detecting a total current value flowing between the collector and the guide rail.
In the present embodiment, the detection of the total current value flowing between the current collector and the guide rail is substantially the same as step S110 in the first embodiment, and the relevant points are described with reference to the part of step S110 in the first embodiment, and the present embodiment is not described in detail herein.
Illustratively, as shown in fig. 2b, the number of guide rails in this example is two and the number of current collectors is 4. Specifically, the guide rails include a first guide rail 211 and a second guide rail 212, and the first guide rail 211 and the second guide rail 212 are symmetrically arranged in the hoistway; the current collectors include a first current collector 221, a second current collector 222, a third current collector 223, and a fourth current collector 224; the first current collector 221 and the second current collector 222 are arranged on one side of the car 23 close to the first guide rail 211 at intervals, the first current collector 221 is arranged on one side close to a power supply for supplying power to the guide rail, the first current collector 221 and the second current collector 222 are both electrically connected with the first guide rail 211, and the first current collector 221 and the second current collector 222 are connected in parallel; a third current collector 223 and a fourth current collector 224 are symmetrically arranged on the side of the car 23 close to the second guide rail 212 with the first current collector 221 and the second current collector 222, the third current collector 223 is located close to the side of the power supply for supplying power to the guide rail, the third current collector 223 and the fourth current collector 224 are both electrically connected to the second guide rail 212, and the third current collector 223 and the fourth current collector 224 are connected in parallel. By respectively arranging two current collectors corresponding to the first guide rail 211 and the second guide rail 212, the stability and reliability of taking electricity from the guide rails in the running process of the car 23 can be enhanced, the abnormal problem of power supply caused by poor contact or broken contact when a single current collector is arranged is avoided, and meanwhile, too much cost cannot be increased.
When detecting the total current value flowing between the first current collector 221, the second current collector 222, the third current collector 223, and the fourth current collector 224, and the first guide rail 211 and the second guide rail 212, the method includes:
detecting a first current value flowing through the first current collector;
detecting a second current value flowing through the second current collector;
detecting a third current value flowing through the third current collector;
detecting a fourth current value flowing through the fourth current collector;
and accumulating the first current value and the second current value or accumulating the third current value and the fourth current value to obtain a total current value between the collector and the guide rail.
In the embodiment of the present invention, the number of collectors provided for each guide rail is not limited, and the number of collectors provided for each guide rail may be set to 1 or more. And the current collectors provided on each guide rail are not limited to be symmetrically arranged. It should be noted that in the embodiment of the present invention, the distance between the current collectors disposed on the same guide rail is only defined to be constant, that is, the distance between the current collectors is kept constant during the operation of the car 23.
When the number of the current collectors arranged corresponding to each guide rail can be set to be 1 or more than 1, the total current value is calculated by detecting each branch current of the current collectors connected to a single guide rail, and the total current value is equal to the sum of the currents flowing through all the current collectors on the guide rail.
Step S202 detects the voltage applied to the rail as a power supply voltage.
In this embodiment, the current collectors pick up power from the rails to power the electrical equipment within the car 23, and the rails are connected to a power source to power the rails. The voltage applied to the guide rail by the guide rail can be detected by detecting the voltage of the power supply or directly detecting the voltage applied to the guide rail from the guide rails on two sides, so as to obtain the magnitude of the power supply voltage for supplying power to the guide rail. For the collection of the voltage, the voltage can be detected by setting a corresponding voltage detection circuit, and then the detected voltage value is read from the voltage detection circuit.
Step S203 detects the voltage of the load connected to the collector as the load voltage.
In this embodiment, the current collector is mainly used to provide electrical energy to the electrical equipment on the car 23, and the electrical equipment on the car 23 is the load in the current collector operating circuit. The voltage of the load connected to the current collector, i.e. the voltage of the electrical consumers on the car 23 during operation, i.e. the load voltage referred to in this embodiment, is detected.
Exemplarily, as in the elevator configuration shown in fig. 2b, the measurement points selected for the detection of the load voltage are the parallel point of the first current collector 221 and the second current collector 222 and the parallel point of the third current collector 223 and the fourth current collector 224.
And step S204, calculating the difference value between the power supply voltage and the load voltage to obtain the total voltage value between the collector and the guide rail.
In the present embodiment, since the current collectors are used to pick up the electric energy from the guide rails to supply the electric energy to the electric equipment on the car 23, the whole power supply circuit mainly includes the power supply parts of the guide rails and the current collectors and the electric equipment parts on the car 23. In this embodiment, the total voltage value between the rail and the collector can thus be obtained by calculating the difference between the supply voltage applied to the rail and the load voltage removed by the consumer by means of indirect measurement.
And S205, acquiring the sum of the internal resistance values of the guide rails between the collector on the side, close to the power supply, of the guide rail on each guide rail and the power supply.
In this embodiment, there is an internal resistance due to the rail between the current collector and the power source. During operation of the elevator the internal resistance of the guide rail will be divided into parts of the supply voltage, and the total voltage value obtained in step S204 comprises the parts of the supply voltage divided by the internal resistance of the guide rail.
For example, as for the internal resistance value of the guide rail between the collector and the power source, the internal resistance may be directly detected when the guide rail is installed, the position of the car 23 is obtained in step S205, and then the internal resistance of the guide rail of the corresponding length measured in advance is directly read as the internal resistance value to be obtained in step S205. Alternatively, the position of the car 23 is obtained in step S205 by detecting the internal resistance value of the guide rail per unit length, and then the internal resistance value of the guide rail at the corresponding position is obtained by conversion.
Exemplarily, the elevator structure as shown in fig. 2b, calculating a total resistance value of the resistance formed by the contact between the collector and the guide rail according to the total current value and the total voltage value, includes:
acquiring a first internal resistance value of a first guide rail between a first current collector and a power supply;
acquiring a second internal resistance value of a second guide rail between the third current collector and the power supply;
accumulating the first internal resistance value and the second internal resistance value to obtain the sum of the internal resistance values of the guide rails between the current collector and the power supply on the side, close to the power supply, of each guide rail;
calculating the ratio of the total voltage value to the total current value to obtain a first resistance value;
the difference between the first resistance value and the sum of the internal resistance values is calculated as the total resistance value of the resistance formed by the contact between the collector and the rail.
As in the elevator structure shown in fig. 2b, the current collectors on the guide rail near the power supply side of the guide rail are a first current collector 221 and a third current collector 223, respectively. A first internal resistance value of the first rail 211 between the first current collector 221 and the power source, and a second internal resistance value of the second rail 212 between the third current collector and the power source. The sum of the internal resistance values to be obtained is the sum of the first internal resistance value and the second internal resistance value.
Step S206, calculating the ratio of the total voltage value to the total current value to obtain a first resistance value.
In the present embodiment, according to ohm' S law, the sum of the resistance value of the resistance formed by the contact between the collector and the rail and the internal resistance of the rail connected into the power supply circuit, that is, the first resistance value in step S206, can be calculated using the total voltage value and the total current value.
Step S207, calculating a difference value between the first resistance value and the sum of the internal resistance values as a total resistance value of the resistance formed by the contact between the collector and the rail.
In this embodiment, in obtaining the internal resistance value of the guide rail between the collectors and the power source, the internal resistance value of the portion of the guide rail between the collectors on the same guide rail is not calculated. Since the distance between the current collectors on the same guide rail is constant in the present embodiment and does not change along with the movement of the car 23, the internal resistance value of the guide rail portion between the current collectors on the same guide rail is kept constant all the time, and the final judgment of the power supply state between the current collectors and the guide rail is not affected. Meanwhile, the internal resistance value of the guide rail between the current collectors is counted into the total resistance value for judging the supply state of the current collectors and the guide rail, so that a large amount of calculation caused by calculating the internal resistance values of partial guide rails connected in parallel with the resistor formed by the contact between partial current collectors and the guide rail can be avoided, and the workload for calculating the total resistance value of the resistor formed by the contact between the current collectors and the guide rail is reduced.
As in the elevator structure shown in fig. 2b, the internal resistance values of the first guide rail 211 between the first collector 221 and the second collector 222 and the second guide rail 212 between the third collector 223 and the fourth collector 224 are not calculated when the internal resistance values of the guide rails between the collectors and the power source are obtained. Since the distance between the first current collector 221 and the second current collector 222 is constant and the distance between the third current collector 223 and the fourth current collector 224 is constant, the internal resistance values of the first guide rail 211 between the first current collector 221 and the second current collector 222 and the second guide rail 212 between the third current collector 223 and the fourth current collector 224 are in a constant state. Therefore, not calculating the internal resistance values of the first guide rail 211 between the first current collector 221 and the second current collector 222 and the second guide rail 212 between the third current collector 223 and the fourth current collector 224 within the total resistance value does not affect the determination of the power supply state between the final corresponding current collector and the guide rail.
Specifically, in the elevator configuration shown in fig. 2b, the total resistance value can be calculated with reference to the following formula:
wherein R isGeneral assemblyAs a total resistance value, UGeneral assemblyIs the total resistance value, IGeneral assemblyAs a total current value, U0For supply voltage, Uminus is load voltage, I1Is a first current value, I2A second current value, I3Third current value, I4The fourth current value.
And S208, detecting the power supply state of the guide rail for supplying power to the current collector according to the total current value and the total resistance value.
Step S2081, whether the total current value is zero or not is judged.
If the total current value is zero, judging that the power supply state of the position where the total current value is detected is abnormal;
if the total current value is not zero, executing step S2082;
in this embodiment, if the total current value is zero, it represents that the current collector cannot pick up electric energy from the guide rail, and cannot provide electric energy for the electric equipment on the car 23. Therefore, when the total current is zero, it is possible to determine that the power supply state of the position where the total current value is detected is abnormal.
And step S2082, comparing the total resistance value with a preset first range value.
If the total resistance value falls into the first range value, judging that the power supply state of the position where the total current value is detected is normal;
if the total resistance value exceeds the first range value, the power supply state of the position where the total current value is detected is judged to be abnormal.
In this embodiment, the first range value is a range of variation in the magnitude of a normal resistance value of a resistance formed by contact between the collector and the guide rail when the elevator is operating normally. The collector slides on the guide rail to pick up the electric energy to supply the electric power to the electric equipment of the car 23, and if the collector works normally, the total resistance value between the collector and the guide rail will vary within a stable range. If the surface of the guide rail is rusted or covered with foreign matter, or a large shock occurs during the operation of the car 23, the contact between the collector and the surface of the guide rail is poor, and the total resistance value is represented as exceeding the first range value in normal operation.
As shown in fig. 2b, the elevator structure detects a power supply state of the guide rail for supplying power to the collector according to the total current value and the total resistance value, further comprising:
and judging whether the total current value is zero or not, and acquiring whether the integral power supply state is abnormal or not.
If the total current value is zero, a non-conductive foreign matter covering the surface of the guide rail corresponding to the position having at least the distance between the first current collector 221 and the second current collector 222 exists, and a maintenance worker is required to check the surface condition of the guide rail in time.
And judging whether the first current value, the second current value, the third current value or the fourth current value is zero or not.
If the first current value, the second current value, the third current value or the fourth current value is zero, the surface of the guide rail representing the position where the corresponding collector is located is covered with a non-conductive foreign matter.
If the total current value is not zero, the total resistance value is compared with a preset first range value.
If the total resistance value falls into the first range value, judging that the power supply state of the position where the total current value is detected is normal;
if the total resistance value exceeds the first range value, the power supply state of the position where the total current value is detected is judged to be abnormal.
Optionally, in the embodiment of the present invention, an energy storage device is disposed on the car 23, and the energy storage device can provide electric energy for the car 23.
After step S2081, determining whether the total current value is zero, the method further includes:
if the total current value is zero, executing step S2083;
if the total current value is not zero, step S2084 is performed.
And step S2083, switching the energy storage device to a power supply state for supplying power to the car 23.
When the total current value is zero, it represents that the current collector cannot pick up electric energy from the guide rail and cannot provide electric energy for electric equipment on the car 23. At this time, the energy storage device is switched to a power supply state for supplying power to the car 23. By switching the energy storage device on the car 23 to the power supply state for supplying power to the car 23, the power supply of the electric equipment in the car 23 can be ensured, and the problems of panic of elevator passengers and potential safety hazards caused by the fact that the electric equipment in the car 23 cannot normally work due to the fact that the current collector cannot obtain electric energy from the guide rail and the electric equipment in the car 23 can not normally work are avoided.
Step S2084, comparing the total voltage value with a preset second range value;
if the total voltage value exceeds the second range value, executing step S2085;
if the total voltage value falls within the second range, step S2086 is performed.
Step S2085, the energy storage device is switched to a power supply state for supplying power to the car 23.
In this embodiment, the second range of values is the range of total voltage values divided by the resistance formed by the collector in direct contact with the rail when the collector is in good contact with the rail. When the total voltage value exceeds a certain range, the voltage that can be distributed to the electric equipment in the car 23 is low, and the electric equipment in the car 23 cannot be supplied to normal use. At this time, the energy storage device is switched to a power supply state for supplying power to the car 23, so that enough electric energy can be provided for the electric equipment in the car 23, the normal operation of the electric equipment in the car 23 is ensured, and the potential safety hazard caused by insufficient supply of the electric energy acquired by the current collector from the guide rail to the electric equipment is avoided.
And step S2086, switching the energy storage device to a charging state.
When the total current value between the current collector and the guide rail is not zero and the total voltage value does not exceed the second range, the electric equipment in the car 23 can be well supplied with energy, and the energy storage device is switched to a charging state at the moment, so that the energy storage device can be guaranteed to have enough electric energy to guarantee the power supply to the car 23 when in use.
Step S209, counting the first time when the total current value is continuously zero;
for example, the first time that the total current is continuously zero may be obtained by setting a timer, starting the timer when the total current is detected to be zero, and stopping the timer when the total current is detected to be not zero. Or sequencing the detected current values according to time, and then counting the time length of the sequenced total current value which is continuously zero, thereby obtaining the first time when the total current is continuously zero. In addition, other statistical methods may be used to meet the use requirements of the embodiments of the present invention, and are not explicitly listed here.
Step S210, comparing the first time with a preset first threshold value;
if the first time is greater than or equal to the first threshold, step S213.
Step S211, counting a second time for continuously supplying power by using the energy storage device;
for example, the second time period for continuously supplying power to the energy storage device may be obtained by installing a timer, starting the timer when the energy storage device is detected to be supplied with power outwards, and stopping the timer when the energy storage device stops being supplied with power outwards.
Step S212, comparing the second time with a preset second threshold value;
if the second time is greater than or equal to the second threshold, step S213.
And step S213, executing alarm operation.
In this embodiment, the first and second thresholds are the length of time that the energy storage device on the car 23 is able to power the electrical equipment within the car 23. Because energy memory's electric quantity is certain, after adopting energy memory to supply power for a certain time, energy memory can not continue to provide the electric energy for consumer again, if the elevator still continues the operation this moment, danger coefficient will great improvement, is unfavorable for the safe operation of elevator, carries out the alarm operation this moment, sends the police dispatch newspaper to the maintenance personal to timely elevator maintain, can effectually reduce the danger when the elevator moves.
Optionally, the length of the first threshold may be set to be smaller than a time length that the energy storage device can supply power to the electric device in the car 23, so as to ensure reliability when the energy storage device is used for supplying power.
In the embodiment of the present invention, the electric energy storage amount in the energy storage device may be counted, and the alarm operation in step S211 is executed when the electric energy storage amount of the energy storage device decreases to a certain height and charging cannot be obtained. Through monitoring energy memory to energy memory's electric energy reserves, send the warning when energy memory's electric energy reserves drop to a certain extent, the security of elevator operation that can further improve.
As illustrated in fig. 2b, after step S213, time statistics of zero of the first current value, the second current value, the third current value, or the fourth current value is further included, and if the first current value, the second current value, the third current value, or the fourth current value continues to be zero, it represents that the corresponding current collector is in an abnormal operation, and a maintenance operation needs to be performed on the current collector.
On the basis of the technical scheme, a total current value-position curve, a total voltage value-position curve and a total resistance value-position curve can be drawn by using the detected total current value, the detected total voltage value, the calculated total resistance value and the calculated acquisition position as data sources, and a maintenance and repair person can conveniently judge the abnormal position according to the total current value-position curve, the total voltage value-position curve and the total resistance value-position curve, so that the manual gradual check on the surface of the guide rail is reduced, and the maintenance and repair workload is effectively reduced.
According to the technical scheme of the embodiment of the invention, the total voltage value between the current collector and the guide rail is indirectly obtained by measuring the power supply voltage of the guide rail and the load voltage of the load on the car 23, so that a detection circuit can be prevented from being arranged between the guide rail and the car 23, an auxiliary measurement circuit crossing the current collector and the guide rail is reduced, the phenomenon of multiple bending damage of a traveling cable in the prior art is avoided, and the detection reliability of the detection circuit is ensured. In the running process of the car 23, the length of the guide rail between the current collector and the power supply is changed, so that the internal resistance value of the part of the guide rail between the current collector and the power supply is correspondingly changed, the internal resistance value of the guide rail between the current collector and the power supply is removed in the calculation process, the calculated total resistance value of the resistor formed by the contact between the current collector and the guide rail caused by the internal resistance change of the guide rail between the current collector and the power supply is prevented from generating large fluctuation, and the reliability of the detection result is ensured. The power supply state of the elevator is judged by simultaneously utilizing the total current value and the total resistance value, so that the accuracy of judging the power supply state of the elevator can be ensured. And when the current collector can not normally supply power to the electric equipment of the car 23, the power collector is switched to the energy storage device to supply power, so that the running safety of the elevator can be further ensured.
EXAMPLE III
Third embodiment of the present invention provides a power supply detection device for an elevator, and fig. 3 is a schematic structural diagram of the power supply detection device for an elevator provided by the third embodiment of the present invention, as shown in fig. 3, the device includes:
a current detection module 301 for detecting the total current value flowing between the collector and the guide rail;
a voltage detection module 302 for detecting a total voltage value between the collector and the rail;
a total resistance value calculation module 303 for calculating a total resistance value of a resistance formed by contact between the collector and the rail based on the total current value and the total voltage value;
and a power supply detection module 304, configured to detect a power supply state in which the rail supplies power to the current collector according to the total current value and the total resistance value.
For example, in an embodiment of the present invention, the voltage detection module 302 may include:
a supply voltage detection unit for detecting a voltage applied to the rail as a supply voltage;
a load voltage detection unit for detecting a voltage of a load connected to the collector as a load voltage;
and the total voltage value calculating unit is used for calculating the difference value between the power supply voltage and the load voltage to obtain the total voltage value between the current collector and the guide rail.
Illustratively, in an embodiment of the present invention, the total resistance value calculating module 303 may include:
an internal resistance value acquisition unit for acquiring an internal resistance value of a guide rail between the collector and the power supply;
the ratio calculation unit is used for calculating the ratio of the total voltage value to the total current value to obtain the sum of the resistance and the internal resistance value formed by the contact between the current collector and the guide rail;
and the difference value calculating unit is used for calculating the difference value between the sum and the internal resistance value to obtain the total resistance value of the resistor formed by the contact between the current collector and the guide rail.
For example, in an embodiment of the present invention, the power supply detection module 304 may include:
the first total current judging unit is used for judging whether the total current value is zero or not; if the total current value is zero, judging that the power supply state of the position where the total current value is detected is abnormal; if the total current value is not zero, executing a total resistance value range comparison unit;
the total resistance value range comparing unit is used for comparing the total resistance value with a preset first range value; if the total resistance value falls into the first range value, judging that the power supply state of the position where the total current value is detected is normal; if the total resistance value exceeds the first range value, the power supply state of the position where the total current value is detected is judged to be abnormal.
A second total current judging unit for judging whether the total current value is zero; if the total current value is zero, switching the energy storage device to a power supply state for supplying power to the lift car; if the total current value is not zero, executing a total voltage value comparison unit;
the total voltage value comparison unit is used for comparing the total voltage value with a preset second range value; if the total voltage value exceeds a second range value, switching the energy storage device to a power supply state for supplying power to the lift car; and if the total voltage value falls into a second range value, switching the energy storage device to a charging state.
The first time counting unit is used for counting the first time when the total current value is continuously zero;
the first time comparison unit is used for comparing the first time with a preset first threshold value; if the first time is greater than or equal to a first threshold value, executing alarm operation;
the second time counting unit is used for counting the second time for continuously adopting the energy storage device to supply power;
a second time comparing unit for comparing the second time with a preset second threshold value; and if the second time is greater than or equal to the second threshold value, executing alarm operation.
In a specific embodiment, the method further comprises the following steps:
a first current value detection unit for detecting a first current value flowing through the first current collector;
a second current value detection unit for detecting a second current value flowing through the second current collector;
a third current value detection unit for detecting a third current value flowing through the third current collector;
a fourth current value detecting unit for detecting a fourth current value flowing through the fourth current collector;
and the accumulation unit is used for accumulating the first current value and the second current value or accumulating the third current value and the fourth current value to obtain the total current value between the current collector and the guide rail.
The power supply detection device for the elevator provided by the embodiment can execute the power supply detection method for the elevator provided by the first embodiment or the second embodiment of the invention, and has corresponding functions and beneficial effects.
Example four
Fig. 4 is a schematic structural diagram of an apparatus according to embodiment 4 of the present invention, as shown in fig. 4, the apparatus includes a processor 401, a memory 402, an input device 403, and an output device 404; the number of the processors 401 in the device may be one or more, and one processor 401 is taken as an example in fig. 4; the processor 401, the memory 402, the input device 403 and the output device 404 in the apparatus may be connected by a bus or other means, which is exemplified in fig. 4.
The memory 402, which is a computer-readable storage medium, can be used for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the power supply detection method of the elevator in the embodiment of the present invention (e.g., the current detection module 301, the voltage detection module 302, the total resistance value calculation module 303, and the power supply detection module 304 in the power supply detection apparatus of the elevator). The processor 401 executes various functional applications and data processing of the device by running software programs, instructions and modules stored in the memory 402, that is, implements the above-described power supply detection method of the elevator.
The memory 402 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 402 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 402 may further include memory located remotely from the processor 401, which may be connected to the device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 403 may be used to receive input current, voltage information, and generate key signal inputs related to user settings and function control of the apparatus. The output device 404 may include an alarm or other output device.
EXAMPLE five
Fifth embodiment of the present invention further provides a storage medium containing computer-executable instructions, on which a computer program is stored, which when executed by a processor implements the power supply detection method of an elevator according to the first and second embodiments.
Of course, the embodiment of the present invention provides a storage medium containing computer-executable instructions, and the computer-executable instructions are not limited to the operations of the method described above, and can also perform related operations in the power supply detection method of an elevator provided by any embodiment of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the power supply detection device for an elevator, the units and modules included in the embodiment are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by suitable instruction execution devices. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (12)
1. A power supply detection method of an elevator is characterized by comprising the following steps:
when a car runs in a hoistway, detecting the total current value flowing between a current collector and a guide rail, wherein the guide rail is arranged in the hoistway and used for providing electric energy, the current collector is arranged on the car and electrically connected with the guide rail, at least two guide rails are arranged in the hoistway, and at least one current collector is arranged corresponding to each guide rail and electrically connected with the guide rail;
detecting a total voltage value between the current collector and the guide rail;
calculating a total resistance value of a resistance formed by contact between the collector and the guide rail according to the total current value and the total voltage value;
and detecting the power supply state of the guide rail for supplying power to the current collector according to the total current value and the total resistance value.
2. The power supply detecting method of an elevator according to claim 1, wherein the detecting of the total voltage value between the collector and the guide rail includes:
detecting a voltage applied to the rail as a supply voltage;
detecting a voltage of a load connected to the collector as a load voltage;
and calculating the difference value of the power supply voltage and the load voltage to obtain the total voltage value between the current collector and the guide rail.
3. The method according to claim 1, wherein said calculating a total resistance value of a resistance formed by contact between the collector and the guide rail based on the total current value and the total voltage value includes:
acquiring the sum of the internal resistance values of the guide rails between the current collector and the power supply on the side, close to the power supply of the guide rails, of each guide rail;
calculating the ratio of the total voltage value to the total current value to obtain a first resistance value;
and calculating the difference value of the first resistance value and the sum of the internal resistance values as the total resistance value of the resistance formed by the contact between the current collector and the guide rail.
4. The method according to claim 1, wherein said detecting a power supply state of the guide rail to supply power to the current collector based on the total current value and the total resistance value comprises:
if the total current value is zero, judging that the power supply state of the position where the total current value is detected is abnormal;
if the total current value is not zero, comparing the total resistance value with a preset first range value;
if the total resistance value falls into the first range value, judging that the power supply state of the position where the total current value is detected is normal;
and if the total resistance value exceeds the first range value, judging that the power supply state of the position where the total current value is detected is abnormal.
5. The power supply detection method of the elevator according to any one of claims 1 to 4, characterized in that an energy storage device is arranged on the car, and the energy storage device can provide electric energy for the car;
the method further comprises the following steps:
if the total current value is zero, switching the energy storage device to a power supply state for supplying power to the car;
if the total current value is not zero, comparing the total voltage value with a preset second range value;
if the total voltage value exceeds the second range value, switching the energy storage device to a power supply state for supplying power to the car;
and if the total voltage value falls into the second range value, switching the energy storage device to a charging state.
6. The power supply detecting method of an elevator according to claim 5, further comprising:
counting a first time when the total current value is continuously zero;
comparing the first time with a preset first threshold value;
if the first time is greater than or equal to the first threshold value, executing alarm operation;
counting a second time for continuously supplying power by using the energy storage device;
comparing the second time with a preset second threshold value;
and if the second time is greater than or equal to the second threshold value, executing alarm operation.
7. The method according to any one of claims 1 to 4, wherein the guide rail includes a first guide rail and a second guide rail, and the first guide rail and the second guide rail are symmetrically disposed in the hoistway; the current collectors include a first current collector, a second current collector, a third current collector, and a fourth current collector;
the first current collector and the second current collector are arranged on one side, close to the first guide rail, of the car at intervals, the first current collector is located on one side, close to a power supply for supplying power to the guide rail, the first current collector and the second current collector are both electrically connected with the first guide rail, and the first current collector and the second current collector are connected in parallel;
the third current collector and the fourth current collector with first current collector and second current collector symmetry set up in the car is close to one side of second guide rail, the third current collector is located and is close to for the power one side that the guide rail provided the electric energy, third current collector and fourth current collector all with the second guide rail electricity is connected, the third current collector with fourth current collector parallel connection.
8. The power supply detecting method of an elevator according to claim 7, wherein the detecting of the total current value flowing between the collector and the guide rail includes:
detecting a first current value flowing through the first current collector;
detecting a second current value flowing through the second current collector;
detecting a third current value flowing through the third current collector;
detecting a fourth current value flowing through the fourth current collector;
and accumulating the first current value and the second current value or accumulating the third current value and the fourth current value to obtain a total current value between the collector and the guide rail.
9. The method according to claim 7, wherein said calculating a total resistance value of a resistance formed by contact between the collector and the guide rail based on the total current value and the total voltage value includes:
obtaining a first internal resistance value of the first rail between the first current collector and the power source;
obtaining a second internal resistance value of the second rail between the third current collector and the power source;
accumulating the first internal resistance value and the second internal resistance value to obtain the sum of the internal resistance values of the guide rails between the current collector and the power supply on the side, close to the power supply, of each guide rail;
calculating the ratio of the total voltage value to the total current value to obtain a first resistance value;
and calculating the difference value of the first resistance value and the sum of the internal resistance values as the total resistance value of the resistance formed by the contact between the current collector and the guide rail.
10. A power supply detection device for an elevator, comprising:
the current detection module is used for detecting the total current value flowing between the current collector and the guide rail;
the voltage detection module is used for detecting a total voltage value between the current collector and the guide rail;
a total resistance value calculation module for calculating a total resistance value of a resistance formed by contact between the current collector and the guide rail according to the total current value and the total voltage value;
and the power supply detection module is used for detecting the power supply state of the guide rail for supplying power to the current collector according to the total current value and the total resistance value.
11. A power supply detection apparatus of an elevator, the apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the power supply detection method of an elevator according to any one of claims 1 to 9 when executing the program.
12. A storage medium on which a computer program is stored, characterized in that the program, when being executed by a processor, carries out a method of detecting a supply of power to an elevator according to any one of claims 1-9.
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