Elevator steel band detection device

Abstract

The application relates to an elevator steel belt detection device which comprises a steel belt, a constant-voltage power supply, a series resistance, a sampling resistance, a sampling circuit, an operational amplifier circuit and an MCU processor. The constant-voltage power supply is connected with the steel belt and is used for electrifying the steel belt. The series resistance is connected in series between the front end of the steel belt and the constant-voltage power supply, and the sampling resistance is arranged at the rear end of the steel belt and is connected in series with the steel belt. The input end of the sampling circuit is connected with the series resistance and is used for sampling the voltage of the series resistance. The input end of the operational amplifier circuit is connected with the sampling resistance and is used for sampling the voltage of the sampling resistance. The MCU processor is connected with the output end of the sampling circuit and the output end of the operational amplifier circuit respectively. The series resistance and the sampling resistance are connected at the front and rear ends of the steel belt respectively, and a complete electric detection loop is constructed by combining the constant-voltage power supply, the sampling circuit, the operational amplifier circuit and the MCU processor, so that the real-time monitoring of the state of the elevator steel belt is realized, internal fault identification can be completed without damaging the structure of the steel belt, and the device has the advantages of simple structure, fast response speed and strong applicability.

Description

Technical Field

[0001] This utility model relates to the field of elevator testing technology, specifically to an elevator steel belt testing device. Background Technology

[0002] The steel belt in an elevator typically consists of a steel wire rope core and an outer layer of insulating resin, bearing the crucial traction function. However, during long-term operation, elevator steel belts may suffer various damage problems due to improper installation, high usage frequency, and untimely maintenance. Common issues include surface aging or breakage, exposed internal steel core, wire pulling, breakage, and even strand breakage. The first type of problem (surface damage) is visible to the naked eye and easily detected during routine maintenance. However, the second type (exposed steel core) and the third type (steel core breakage, strand breakage) are often difficult to detect and, once they occur, pose a significant threat to elevator operational safety. Existing detection methods mainly rely on manual inspections or complex external instruments, making it difficult to achieve real-time, efficient, and systematic fault monitoring, especially lacking effective early warning and diagnostic means for internal structural damage. Utility Model Content

[0003] The purpose of this invention is to provide an elevator steel belt detection device that can connect a series resistor and a sampling resistor to the front and rear ends of the steel belt respectively, and construct a complete electrical detection circuit by combining a constant voltage power supply, a sampling circuit, an operational amplifier circuit and an MCU processor, so as to realize real-time monitoring of the elevator steel belt status. It can complete internal fault identification without damaging the steel belt structure. It has a simple structure, fast response speed and strong applicability.

[0004] To achieve the above objectives, this utility model provides an elevator steel belt detection device, comprising:

[0005] steel strip;

[0006] A constant voltage power supply, connected to the steel strip, is used to energize the steel strip;

[0007] A series resistor is connected in series between the front end of the steel strip and the constant voltage power supply.

[0008] A sampling resistor is disposed at the rear end of the steel strip and connected in series with the steel strip;

[0009] A sampling circuit, wherein the input terminal of the sampling circuit is connected to the sampling resistor, and is used to amplify and sample the voltage of the series resistor;

[0010] An operational amplifier circuit, wherein the input terminal of the operational amplifier circuit is connected to the series resistor, and is used to sample the voltage of the sampling resistor;

[0011] The MCU processor is connected to the output of the sampling circuit and the output of the operational amplifier circuit, respectively.

[0012] Optionally, the elevator steel belt detection device further includes:

[0013] A step-down circuit is provided, with its input terminal connected to the constant voltage power supply and its output terminal connected to the MCU processor, the sampling circuit, and the operational amplifier circuit, for providing step-down power to the MCU processor, the sampling circuit, and the operational amplifier circuit.

[0014] Optionally, the constant voltage power supply has a supply voltage of DC12V-24V.

[0015] Optionally, the elevator steel belt detection device further includes:

[0016] The elevator control system is connected to the MCU processor.

[0017] Optionally, the elevator steel belt detection device further includes:

[0018] A relay switching module, connected to the MCU processor, includes:

[0019] The first relay group is connected between the series resistor and the plurality of steel strip front ends for switching the path of the constant voltage power supply to the target steel strip front end;

[0020] The second relay group is connected between the rear ends of the multiple steel strips and the sampling resistor, and is used to switch the path from the target rear end of the steel strip to the sampling resistor.

[0021] The beneficial effects of this utility model are as follows: by connecting series resistors and sampling resistors at the front and rear ends of the steel belt respectively, and combining a constant voltage power supply, sampling circuit, operational amplifier circuit and MCU processor to construct a complete electrical detection circuit, the real-time monitoring of the elevator steel belt status can be realized. Internal fault identification can be completed without damaging the steel belt structure. The structure is simple, the response speed is fast and the applicability is strong.

[0022] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a schematic flowchart illustrating an embodiment of the elevator steel strip detection device.

[0024] Figure 2 This is a schematic flowchart illustrating an elevator steel belt detection device according to another embodiment of the present invention;

[0025] In the diagram: 1. Steel strip; 2. Constant voltage power supply; 3. Series resistor; 4. Sampling resistor; 5. Sampling circuit; 6. Operational amplifier circuit; 7. MCU processor; 8. Step-down circuit; 9. Elevator control system; 10. Relay switching module; 101. First relay group; 102. Second relay group. Detailed Implementation

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] Please see Figure 1A preferred embodiment of this application shows an elevator steel belt detection device comprising a steel belt 1, a constant voltage power supply 2, a series resistor 3, a sampling resistor 4, a sampling circuit 5, an operational amplifier circuit 6, and an MCU processor 7. The constant voltage power supply 2 is connected to the steel belt 1 and is used to energize the steel belt 1. The series resistor 3 is connected in series between the front end of the steel belt 1 and the constant voltage power supply 2. The sampling resistor 4 is located at the rear end of the steel belt 1 and connected in series with it. The input terminal of the sampling circuit 5 is connected to the series resistor 3 and is used to sample the voltage of the series resistor 3. The input terminal of the operational amplifier circuit 6 is connected to the sampling resistor 4 and is used to amplify and sample the voltage of the sampling resistor 4. The MCU processor 7 is connected to the output terminals of both the sampling circuit 5 and the operational amplifier circuit 6.

[0030] According to the embodiment of this utility model, by connecting series resistors 3 and sampling resistors 4 to the front and rear ends of the steel belt 1 respectively, and combining constant voltage power supply 2, sampling circuit 5, operational amplifier circuit 6 and MCU processor 7 to construct a complete electrical detection circuit, the real-time monitoring of the state of elevator steel belt 1 can be realized. Internal fault identification can be completed without damaging the structure of steel belt 1. The structure is simple, the response speed is fast, and the applicability is strong.

[0031] It should be noted that the current flows out from the positive terminal of the constant voltage power supply 2, enters the front end of the steel strip 1 through the series resistor 3, flows through the entire steel strip 1 and the series sampling resistor 4, and returns to the negative terminal of the constant voltage power supply 2 to form a closed loop. The sampling circuit 5 and the operational amplifier circuit 6 collect the voltage changes of the series resistor 3 at the front end of the steel strip 1 and the sampling resistor 4 at the rear end of the steel strip 1, respectively. The MCU processor 7 performs difference analysis on the two collected voltage values ​​to determine whether the steel strip 1 has faults such as short circuit, wire pulling, or breakage. When the exposed steel strip 1 is short-circuited to ground, the series resistor 3 at the front end of the steel strip 1 has voltage sampling, while the sampling resistor 4 at the rear end of the steel strip 1 has no voltage sampling. When the steel strip 1 is pulled, broken, or has broken strands, the overall resistance of the steel strip 1 increases, causing the current to decrease, which in turn causes the voltage of the sampling resistor 4 at the rear end of the steel strip 1 to change. As the wire and strand breakage of the steel strip 1 intensifies, the resistance of the steel strip 1 itself will continue to increase, causing the voltage sampling value of the sampling resistor 4 at the rear end of the steel strip 1 to decrease rapidly. When the voltage sampling value is close to 0, it can be determined that the steel strip 1 is broken.

[0032] The following detailed description uses specific examples:

[0033] Specifically, please see Figure 1The elevator steel belt detection device also includes a step-down circuit 8. The input of the step-down circuit 8 is connected to the constant voltage power supply 2, and the output of the step-down circuit 8 is connected to the MCU processor 7, the sampling circuit 5, and the operational amplifier circuit 6, for providing step-down power to the MCU processor 7, the sampling circuit 5, and the operational amplifier circuit 6. Specifically, the supply voltage of the constant voltage power supply 2 is DC 12V-24V. The step-down circuit 8 can reduce the voltage of the constant voltage power supply 2 to a low voltage (such as 3.3V or 5V) suitable for the operation of the MCU processor 7, the sampling circuit 5, and the operational amplifier circuit 6.

[0034] In another embodiment, please refer to Figure 2 The elevator steel belt detection device also includes an elevator control system 9, which is connected to an MCU processor 7. The MCU processor 7 determines the damage status of the steel belt 1 by comprehensively comparing the voltage sampling values ​​of the series resistance 3 at both ends of the steel belt 1 and the sampling resistor 4, and promptly reports the fault status to the elevator control system 9 for feedback.

[0035] Please see Figure 2 The elevator steel strip detection device also includes a relay switching module 10, which is connected to the MCU processor 7 and includes a first relay group 101 and a second relay group 102. The first relay group 101 is connected between the series resistor 3 and the front ends of multiple steel strips 1, and is used to switch the path from the constant voltage power supply 2 to the front end of the target steel strip 1. The second relay group 102 is connected between the rear ends of multiple steel strips 1 and the sampling resistor 4, and is used to switch the path from the rear end of the target steel strip 1 to the sampling resistor 4. For multiple steel strips 1, the relay switching module 10 can be used to switch the steel strips 1, thereby realizing the cyclic detection of multiple steel strips 1; for elevator systems exceeding the default limit, cascaded circuits can be used simultaneously to expand the number of detectable steel strips 1.

[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An elevator steel belt detection device, characterized in that, include: steel strip; A constant voltage power supply, connected to the steel strip, is used to energize the steel strip; A series resistor is connected in series between the front end of the steel strip and the constant voltage power supply. A sampling resistor is disposed at the rear end of the steel strip and connected in series with the steel strip; A sampling circuit, wherein the input terminal of the sampling circuit is connected to the series resistor, and is used to sample the voltage of the series resistor; An operational amplifier circuit, the input terminal of which is connected to the sampling resistor, is used to amplify and sample the voltage of the sampling resistor; The MCU processor is connected to the output of the sampling circuit and the output of the operational amplifier circuit, respectively.

2. The elevator steel belt detection device according to claim 1, characterized in that, Also includes: A step-down circuit is provided, with its input terminal connected to the constant voltage power supply and its output terminal connected to the MCU processor, the sampling circuit, and the operational amplifier circuit, for providing step-down power to the MCU processor, the sampling circuit, and the operational amplifier circuit.

3. The elevator steel belt detection device according to claim 1, characterized in that, The constant voltage power supply has a supply voltage of DC12V-24V.

4. The elevator steel belt detection device according to claim 1, characterized in that, Also includes: The elevator control system is connected to the MCU processor.

5. The elevator steel belt detection device according to claim 1, characterized in that, Also includes: A relay switching module, connected to the MCU processor, includes: The first relay group is connected between the series resistor and the plurality of steel strip front ends for switching the path of the constant voltage power supply to the target steel strip front end; The second relay group is connected between the rear ends of the multiple steel strips and the sampling resistor, and is used to switch the path from the target rear end of the steel strip to the sampling resistor.

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