Elevator detection device

Abstract

The invention discloses an elevator detection device which comprises a detection module, a detection instruction decision module and a power module. The power supply module comprises an energy storage unit and a power generation unit, the energy storage unit provides electric energy for the elevator detection device, and the power generation unit partially converts mechanical energy generated when an elevator moves into electric energy and stores the electric energy into the energy storage unit; the detection module is used for detecting preset elevator parts; and the detection instruction decision module controls the frequency or duration of the detection operation performed by the detection module according to the change of the electric quantity in the energy storage unit, so that the electric quantity stored in the energy storage unit is in a preset interval. The maintenance work of the energy storage battery in the detection device can be reduced, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to an elevator detection device. Background Art

[0002] In an elevator system, some parts do not have an external power supply, but require inspection work at these parts. The existing technology uses batteries. However, batteries require regular maintenance, which increases the time and cost of maintenance work. Summary of the invention

[0003] The technical problem to be solved by the present invention is how to provide a technical solution to reduce the maintenance work of the energy storage battery in the detection device and extend the service life.

[0004] In order to solve the above technical problems, the present invention provides an elevator detection device, comprising a detection module, a detection instruction decision module and a power supply module;

[0005] The power supply module includes an energy storage unit and a power generation unit. The energy storage unit provides electrical energy to the elevator detection device. The power generation unit converts part of the mechanical energy generated during the movement of the elevator into electrical energy and stores it in the energy storage unit.

[0006] The detection module detects preset elevator components; the detection instruction decision module controls the frequency or duration of the detection operation of the detection module according to the change of the power in the energy storage unit, so that the power stored in the energy storage unit is within a preset range.

[0007] Preferably, the method by which the detection instruction decision module determines the change in the amount of electricity in the energy storage unit is: the detection instruction decision module records the amount of electricity stored in the energy storage unit before or after the control detection module performs the detection operation; after a preset time, the detection instruction decision module determines whether the amount of electricity stored in the energy storage unit increases or decreases; when the amount of electricity stored in the energy storage unit increases, the frequency or duration of the detection operation performed by the detection module is increased; when the amount of electricity stored in the energy storage unit decreases, the frequency or duration of the detection operation performed by the detection module is reduced.

[0008] Preferably, the power generation unit includes a roller resting on a guide rail, and a generator driven by the roller.

[0009] Preferably, the power generation unit is a piezoelectric power generation device, which generates electrical energy by causing the piezoelectric power generation device to deform when the elevator moves.

[0010] Preferably, the frequency or duration of the detection operation has a preset minimum value.

[0011] Preferably, the minimum capacity of the energy storage unit is determined according to the minimum value of the preset detection operation frequency or duration and the estimated average daily operation times of the elevator.

[0012] Preferably, the method for the detection instruction decision module to increase or decrease the detection operation frequency of the detection module is as follows:

[0013] Preset the initial range of the frequency, the lower limit of the initial range is t min and the upper limit is t max ; the frequency t of the detection operation mid =(t min +t max ) / 2;

[0014] When the electricity stored in the energy storage unit increases, update the value of the lower limit t min to the current detection operation frequency t mid value, and then recalculate the detection operation frequency t mid ;

[0015] When the electricity stored in the energy storage unit decreases, update the value of the upper limit t max to the current detection operation frequency t mid value, and then recalculate the detection operation frequency t mid .

[0016] Preferably, the detection instruction decision module measures the electricity of the energy storage unit by detecting the voltage of the energy storage unit.

[0017] Compared with the prior art, the present invention has the following technical effects:

[0018] 1. Taking the electricity of the energy storage unit for power supply as the control target, the more sufficient the electricity, the longer the detection duration and the higher the frequency; the less the electricity, the shorter the detection duration and the lower the frequency. By adjusting the detection frequency method, increase or decrease the power consumption, so that the battery power remains within a reasonable range of fluctuations, and extend the service life of the energy storage unit;

[0019] 2. Taking the electricity of the energy storage unit as the control target to control the detection duration and frequency, which is positively correlated with the operation duration and start frequency of the elevator, and this meets the detection requirements for the elevator.

[0020] 3. It can keep the electricity of the energy storage unit within a relatively reasonable range, extend the service life of the energy storage unit; reduce unnecessary detections, and can make the specification of the energy storage unit smaller during design, reducing the waste of resources.

[0021] 4. Using the electricity of the energy storage unit to evaluate the operation duration and frequency of the elevator, without detecting other signals of the elevator operation, greatly simplifies the design of the detection circuit / structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0023] Figure 1 This is a structural diagram of an elevator detection device according to Example 1;

[0024] Figure 2 Schematic diagram showing the relationship between the detection frequency and the number of elevator operations under charge and discharge balance conditions in Example 2. DETAILED DESCRIPTION

[0025] The following describes the implementation manner of the present invention through specific specific embodiments. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through different specific implementation manners, and the various details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the overall design concept of the invention. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art.

[0026] Example 1

[0027] like Figure 1 As shown, this embodiment provides an elevator detection device, including a detection module, a detection instruction decision module and a power supply module;

[0028] The power supply module includes an energy storage unit and a power generation unit. The energy storage unit provides electrical energy to the elevator detection device. The power generation unit converts part of the mechanical energy generated during the movement of the elevator into electrical energy and stores it in the energy storage unit.

[0029] The detection module detects preset elevator components; the detection instruction decision module controls the frequency or duration of the detection operation of the detection module according to the change of the power in the energy storage unit, so that the power stored in the energy storage unit is within a preset range.

[0030] The detection instruction decision module records the amount of electricity stored in the energy storage unit before or after the control detection module performs the detection operation; after a preset time, the detection instruction decision module determines whether the amount of electricity stored in the energy storage unit increases or decreases; the detection instruction decision module measures the amount of electricity in the energy storage unit by detecting the voltage of the energy storage unit.

[0031] When the electricity stored in the energy storage unit increases, increase the frequency or duration of the detection operation of the detection module; when the electricity stored in the energy storage unit decreases, decrease the frequency or duration of the detection operation of the detection module.

[0032] Based on the above, the detection strategy aiming at controlling the energy stored in the energy storage unit, that is, the more frequently the elevator runs, the longer the duration and / or the higher the frequency of detection by the detection module, which meets the requirements of the elevator for detection.

[0033] In this embodiment, the electricity of the energy storage unit for power supply is used as the control target. The more sufficient the electricity, the longer the detection duration and the higher the frequency; the less the electricity, the shorter the detection duration and the lower the frequency.

[0034] Preferably, add a roller leaning on the counterweight side guide rail on the counterweight side of the elevator. The roller drives the generator to generate electricity. When the elevator runs, electricity will be obtained. The electricity obtained by this scheme is positively correlated with the running duration of the elevator. That is: the longer the running time of the elevator, the more electricity generated by the power generation unit, and the more energy stored in the energy storage unit.

[0035] Preferably, add a piezoelectric power generation structure on the counterweight side of the elevator. The acceleration during the start / stop process of the elevator will cause the piezoelectric power generation structure to deform, thereby generating electricity. The electricity obtained by this scheme is positively correlated with the running frequency of the elevator. That is, the higher the start frequency of the elevator, the more electricity generated by the power generation unit, and the more energy stored in the energy storage unit.

[0036] Therefore, adjusting the detection duration and frequency with the goal of controlling the electricity of the energy storage unit is positively correlated with the running duration and start frequency of the elevator. This meets the detection needs of the elevator.

[0037] Implementing according to this scheme can keep the electricity of the energy storage unit within a relatively reasonable range, extend the service life of the energy storage unit; reduce unnecessary detections, and can make the specifications of the energy storage unit smaller during design, reducing waste of resources. In this embodiment, the electricity of the energy storage unit is used to evaluate the running duration and frequency of the elevator, without detecting other signals of the elevator operation, greatly simplifying the design of the detection circuit / structure. Not only can the detection frequency be reduced by controlling the energy storage level, but also the detection frequency can be dynamically increased, improving the safety of the elevator.

[0038] Embodiment 2

[0039] Based on Embodiment 1, in this embodiment, the frequency or duration of the detection operation has a preset minimum value. The minimum capacity of the energy storage unit is determined according to the preset minimum value of the frequency or duration of the detection operation and the estimated average daily running times of the elevator.

[0040] For example, if the energy consumption of the detection module for one detection is 100 mA and it takes 15 minutes, the consumed energy is 100*(15 / 60) = 25 mA*h; each elevator operation generates 0.05 mA*h of energy; the overall standby current consumption of the device is 0.1 mA*h, so the daily standby energy consumption of the device is 2.4 mA*h. According to the above data, as Figure 2 shown, the relationship between the detection frequency and the number of elevator operations under the charge-discharge balance condition is listed: n = (Pt + Pd*t) / (Ps*t)

[0041] That is: when the daily operation times n do not reach the required number of times for the detection frequency t, the stored power in the energy storage unit will decrease, and the detection frequency needs to be reduced; when the daily operation times n exceed the required number of times for the detection frequency t, the stored power in the energy storage unit will increase, and the detection frequency needs to be increased.

[0042] It is set that the elevator is detected at least once every 15 days, so even if the elevator does not operate, the detection is still performed. The minimum capacity of the energy storage battery is set to 180 / 15*25 + 2.4*180 = 732 mA*h.

[0043] When the average daily operation times of the elevator are greater than 81 times, by selecting the battery of the above specifications, the battery of the device can be maintenance-free. For elevators with low usage frequencies, this is very easy to achieve.

[0044] Adopting this technical solution, the purpose is not only to reduce the detection frequency, but more importantly, it can increase the detection frequency for elevators with high operation frequencies, which is beneficial to improving the safety of elevators.

[0045] Embodiment 3

[0046] Based on Embodiment 1, this embodiment gives an exemplary description of the method for the detection instruction decision module to increase or decrease the detection frequency of the detection module for detection operations.

[0047] The strategy of the detection instruction decision module adopts the dichotomy method. Set the initial range of the detection frequency, with the lower limit being t min , and the upper limit being t max . Each time the detection frequency is iteratively taken as the intermediate value t mid = (t min + t max ) / 2. During the actual operation process, observe the change of the voltage of the energy storage module at the detection frequency t. After a period of time, if the battery voltage V t is higher than the expected balance point V eq , it means that the detection frequency is too low. At this time, update the lower limit t min to t mid ; if the battery voltage V t is lower than the expected balance point V eq, it indicates that the detection frequency is too high. At this time, update the upper limit to t mid . Iterate repeatedly in this way to continuously narrow the detection frequency range until a suitable detection frequency is found, so that the battery voltage is in a dynamic balance state during long-term operation, that is, V t -V eq < ε, where ε is the allowable voltage error value.

[0048] The initial range of the number of days for one detection is set from 1 day to 21 days. If the detected voltage on the first day is higher than the expected balance voltage, that is, the number of daily operations is more than 548 times, the detection frequency is adjusted to twice a day by the detection instruction decision module and there is no upper limit on the detection frequency. That is, the more frequently the elevator operates, the longer the detection duration and / or the higher the detection frequency by the detection module, which meets the detection requirement of more detections for more operation times of the elevator and the law of battery voltage protection. At the same time, the goal of miniaturizing the battery design is achieved. If the detected voltage on the first day is lower than the expected balance power, that is, the number of daily operations is less than 548 times, the detection frequency is adjusted to 21 by the detection instruction decision module; if the detected voltage on the 21st day is higher than the expected balance power, that is, the number of daily operations is more than 72 times, the lower limit of the detection frequency is adjusted to the intermediate value of 11 days by the detection instruction decision module. The dynamic balance of the voltage of the battery energy storage module is achieved through the dynamic adjustment of the detection frequency and duration. Using this method, the adjustment speed of the detection frequency can be improved without increasing the structural complexity.

[0049] The above has described the present invention in detail through specific embodiments and examples, but these do not constitute a limitation to the present invention. Without departing from the principle of the present invention, those skilled in the art can also make many modifications and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. An elevator detection device, characterized in that, It includes a detection module, a detection instruction decision module and a power supply module; The power supply module includes an energy storage unit and a power generation unit. The energy storage unit provides electrical energy to the elevator detection device. The power generation unit converts part of the mechanical energy generated during the movement of the elevator into electrical energy and stores it in the energy storage unit. The detection module detects preset elevator components; the detection instruction decision module controls the frequency or duration of the detection operation of the detection module according to the change of the power in the energy storage unit, so that the power stored in the energy storage unit is within a preset range.

2. The elevator detection device according to claim 1, wherein The method for the detection instruction decision module to judge the change of the electric quantity in the energy storage unit is: The detection instruction decision module records the amount of electricity stored in the energy storage unit before or after the control detection module performs a detection operation; after a preset time, the detection instruction decision module determines whether the amount of electricity stored in the energy storage unit increases or decreases; When the amount of electricity stored in the energy storage unit increases, the frequency or duration of the detection operation performed by the detection module is increased; when the amount of electricity stored in the energy storage unit decreases, the frequency or duration of the detection operation performed by the detection module is reduced.

3. The elevator detection device according to claim 1, wherein The power generation unit comprises a roller resting on a guide rail and a generator driven by the roller.

4. The elevator detection device according to claim 1, characterized in that, The power generation unit is a piezoelectric power generation device, which generates electrical energy by causing the piezoelectric power generation device to deform when the elevator moves.

5. The elevator detection device according to claim 1, wherein The frequency or duration of the detection operation has a preset minimum value.

6. The elevator detection device according to claim 5, wherein The minimum capacity of the energy storage unit is determined according to a preset minimum value of the frequency or duration of the detection operation and an estimated average number of elevator operations per day.

7. The elevator detection device according to claim 2, wherein, The method by which the detection instruction decision module increases or decreases the frequency of the detection operation performed by the detection module is: The initial range of the preset frequency, the lower limit of the initial range is t min The upper limit is t max ; The frequency t of the detection operation mid =(t min +t max ) / 2; When the power stored in the energy storage unit increases, update the value of the lower limit t min to the value of the frequency t mid of the current detection operation, and then recalculate the frequency t mid ; When the stored power in the energy storage unit decreases, update the value of the upper limit t max to the value of the frequency t mid of the current detection task, and then recalculate the frequency t mid of the detection task.

8. The elevator detection device according to claim 1, characterized in that, The detection instruction decision module measures the electric quantity of the energy storage unit by detecting the voltage of the energy storage unit.

Images