阅读说明：本技术 随行电缆摆动幅度检测系统和方法 (System and method for detecting swing amplitude of traveling cable ) 是由 张益健 刘光耀 李灿熙 于 2020-07-07 设计创作，主要内容包括：本发明提出一种随行电缆摆动幅度检测系统和方法,目的在于实现结构简单、准确且成本低的测量方案,该系统包括在最下端线缆固定架的下方沿井道纵向设置的至少一个光电检测模块；连接各光电检测模块以获取各检测点摆幅值的微机系统；该方法包括摆幅阈值设定步骤,将电梯轿厢运行至最底层,并晃动随行电缆使其以最大横向摆幅Amax摆动；由光电检测模块获取其所正对的随行电缆的摆幅An；根据摆幅An和距离Dn运算获得对应的最大摆幅角Bn；取各最大摆幅角Bn的均值B<Sub>mean</Sub>作为摆幅阈值；摆幅检测步骤,通过光电检测模块实时获取摆幅An,继而计算当前摆幅角Cn；超限判断告警步骤,在当前摆幅角Cn大于或等于摆幅阈值B<Sub>mean</Sub>时,上报进行告警。(The invention provides a system and a method for detecting the swing amplitude of a traveling cable, aiming at realizing a measuring scheme with simple structure, accuracy and low cost, wherein the system comprises at least one photoelectric detection module which is arranged below a cable fixing frame at the lowest end along the longitudinal direction of a well; the microcomputer system is connected with each photoelectric detection module to obtain the swing amplitude of each detection point; the method comprises a swing threshold setting step, wherein an elevator car is moved to the bottommost layer, and the traveling cable is shaken to swing with the maximum transverse swing amplitude Amax; acquiring the swing amplitude An of the trailing cable opposite to the photoelectric detection module by the photoelectric detection module; calculating according to the swing amplitude An and the distance Dn to obtain a corresponding maximum swing amplitude angle Bn; taking the average value B of the maximum swing amplitude angles Bn mean As a swing threshold; in the swing amplitude detection step, a swing amplitude An is obtained in real time through a photoelectric detection module, and then a current swing amplitude angle Cn is calculated; an overrun judgment alarm step, when the current swing angle Cn is larger than or equal to the swing threshold value B mean Then report to the userAnd (6) alarming.)

1. The utility model provides a retinue cable amplitude of oscillation detecting system which characterized in that: comprises that

At least one photoelectric detection module is arranged below the cable fixing frame at the lowest end along the longitudinal direction of the shaft;

the microcomputer system is connected with each photoelectric detection module to obtain the swing amplitude of each detection point;

the photoelectric detection module comprises a row of light emitting tubes and a row of light receiving tubes which are arranged at equal intervals, and a microprocessor, wherein the microprocessor obtains the effective tube number of the light receiving tubes to calculate the swing amplitude of the traveling cable which is just opposite to the microprocessor, and the microprocessor is in wired or wireless connection communication with the microcomputer system.

2. The trailing cable wobble amplitude detection system of claim 1, wherein: when a plurality of photoelectric detection modules are arranged, the distances among the photoelectric detection modules are equal.

3. The trailing cable wobble amplitude detection system of claim 2, wherein: the distance between the photoelectric detection modules is equal to the distance between the cable fixing frame at the lowest end and the first photoelectric detection module.

4. The trailing cable wobble amplitude detection system of claim 2 or 3, wherein: the distance between the photoelectric detection modules is 5 meters.

5. The trailing cable wobble amplitude detection system of claim 1, wherein: the distance between the light emitting tubes is 1-2 cm, and the distance between the light receiving tubes is 1-2 cm.

6. The trailing cable wobble amplitude detection system of claim 1,2 or 3, wherein:

the transmitting circuit connected with the light emitting tube comprises a triode Q1, a light emitting tube and a current limiting resistor R1 are connected in series between the collector of the triode Q1 and the VCC end, the emitter of the triode is grounded, and the base of the triode is connected with and controlled by the microprocessor;

the receiving circuit connected with the light receiving tube comprises triodes Q2 and Q3, the triode Q2 is a PNP type triode, the emitter electrode of the triode Q2 is connected with a VCC end, the collector electrode of the triode Q is grounded by a resistor R2, and the base electrode of the triode Q is connected with the light receiving tube; the collector of triode Q3 connects VCC end and is connected to microprocessor by its collector as the output, and its projecting pole ground connection, its base is connected the collector of triode Q2.

7. A trailing cable swing amplitude detection method based on the trailing cable swing amplitude detection system of claim 1, comprising

Firstly), swing threshold setting step:

obtaining the distance Dn of each photoelectric detection module relative to the lowermost cable fixing frame, wherein n is 1, 2;

the elevator car is moved to the bottommost layer, and the traveling cable is shaken to enable the traveling cable to swing at the maximum transverse swing amplitude Amax; at this time, any one or more photoelectric detection modules acquire the swing amplitude An of the traveling cable opposite to the photoelectric detection module, wherein n is 1, 2; when the traveling cable reflects the light emitted by the light emitting tube to the light receiving tube through the cable body, the light receiving tube receiving the reflected light is regarded as effective, and the swing amplitude An is obtained by multiplying the distance between the light receiving tubes by the number of the effective tubes;

then, calculating according to the swing An and the distance Dn of the photoelectric detection module to obtain a corresponding maximum swing angle Bn, wherein n is 1, 2; the operation adopts the following formula:

tangent function tan (bn) ═ An/Dn; (1)

arctan function Bn ═ arctan (An/Dn); (2)

finally, taking the average value B of each maximum swing amplitude angle Bn_meanAs a swing threshold;

II) swing amplitude detection:

in the running process of the elevator, starting any one or more photoelectric detection modules to acquire the oscillation amplitude An of the travelling cable opposite to the photoelectric detection modules in real time, and similarly, when the travelling cable reflects light emitted by the light emitting tube to the light receiving tube through the cable body, the light receiving tube receiving the reflected light is regarded as effective, and the oscillation amplitude An is acquired by multiplying the distance between the light receiving tubes by the number of the effective tubes; calculating the current amplitude angle Cn according to the formulas (1) and (2);

Cn＝arctan(An/Dn),n＝1,2,...；

thirdly), an overrun judgment alarm step:

the obtained current swing angle Cn and a preset swing threshold value B_meanBy contrast, when Cn is greater than or equal to B_meanAnd reporting and alarming.

8. The trailing cable wobble amplitude detection method of claim 7, wherein: the maximum transverse swing Amax is 20 centimeters.

9. The trailing cable wobble amplitude detection method of claim 7, wherein: the photoelectric detection module adopts a scanning detection mode, namely only one photoelectric detection module is started at a time, and scanning detection is carried out from top to bottom.

10. The trailing cable wobble amplitude detection method of claim 7, wherein: the distances Dn of the photoelectric detection modules relative to the lowest cable fixing frame are in a multiple relation.

Technical Field

The invention is applied to the field of elevators, and particularly relates to a system and a method for detecting the swing amplitude of a traveling cable.

Background

At present, when the wind speed is too high or an earthquake occurs, the buildings can swing transversely, and the elevators in the buildings can swing along with the buildings, and when the swing amplitude reaches a certain degree, equipment can be damaged, wherein the traveling cables of the elevators are particularly prominent.

The traveling cable is hung at the bottom of the elevator car, the other end of the traveling cable is fixed in the middle of the hoistway, when the elevator runs, the traveling cable moves along with the elevator, and the swinging amplitude of the traveling cable is larger when the building swings because the cable has inertia, if the amplitude exceeds a certain amplitude, the cable is possibly hung off by mechanical equipment around the hoistway, great economic loss is brought, and personal safety of passengers is possibly damaged.

Disclosure of Invention

In order to overcome the problems in the prior art, the invention provides a system and a method for detecting the swing amplitude of a traveling cable, aiming at realizing a measuring scheme with simple structure, accuracy and low cost, and the specific technical contents are as follows:

the invention relates to a system for detecting the swing amplitude of a traveling cable, which comprises

At least one photoelectric detection module is arranged below the cable fixing frame at the lowest end along the longitudinal direction of the shaft;

the microcomputer system is connected with each photoelectric detection module to obtain the swing amplitude of each detection point;

the photoelectric detection module comprises a row of light emitting tubes and a row of light receiving tubes which are arranged at equal intervals, and a microprocessor, wherein the microprocessor obtains the effective tube number of the light receiving tubes to calculate the swing amplitude of the traveling cable which is just opposite to the microprocessor, and the microprocessor is in wired or wireless connection communication with the microcomputer system.

In one or more embodiments of the present invention, when there are a plurality of photodetecting modules, the pitches of the photodetecting modules are equal.

In one or more embodiments of the present invention, the distance between the photoelectric detection modules is equal to the distance between the cable fixing frame at the lowest end and the first photoelectric detection module.

In one or more embodiments of the present invention, the spacing between the photoelectric detection modules is 5 meters.

In one or more embodiments of the present invention, the distance between the light emitting tubes is 1-2 cm, and the distance between the light receiving tubes is 1-2 cm.

In one or more embodiments of the present invention, the transmitting circuit connected to the light emitting tube includes a transistor Q1, a light emitting tube and a current limiting resistor R1 are connected in series between the collector of the transistor Q1 and the VCC terminal, the emitter thereof is grounded, and the base thereof is connected to and controlled by the microprocessor; the receiving circuit connected with the light receiving tube comprises triodes Q2 and Q3, the triode Q2 is a PNP type triode, the emitter electrode of the triode Q2 is connected with a VCC end, the collector electrode of the triode Q is grounded by a resistor R2, and the base electrode of the triode Q is connected with the light receiving tube; the collector of triode Q3 connects VCC end and is connected to microprocessor by its collector as the output, and its projecting pole ground connection, its base is connected the collector of triode Q2.

The invention relates to a method for detecting the swing amplitude of a traveling cable, which is based on the system for detecting the swing amplitude of the traveling cable and comprises the following steps

Firstly), swing threshold setting step:

obtaining the distance Dn of each photoelectric detection module relative to the lowermost cable fixing frame, wherein n is 1, 2;

the elevator car is moved to the bottommost layer, and the traveling cable is shaken to enable the traveling cable to swing at the maximum transverse swing amplitude Amax; at this time, any one or more photoelectric detection modules acquire the swing amplitude An of the traveling cable opposite to the photoelectric detection module, wherein n is 1, 2; when the traveling cable reflects the light emitted by the light emitting tube to the light receiving tube through the cable body, the light receiving tube receiving the reflected light is regarded as effective, and the swing amplitude An is obtained by multiplying the distance between the light receiving tubes by the number of the effective tubes;

then, calculating according to the swing An and the distance Dn of the photoelectric detection module to obtain a corresponding maximum swing angle Bn, wherein n is 1, 2; the operation adopts the following formula:

tangent function tan (bn) ═ An/Dn; (1)

arctan function Bn ═ arctan (An/Dn); (2)

finally, taking the average value B of each maximum swing amplitude angle Bn_meanAs a swing threshold;

II) swing amplitude detection:

in the running process of the elevator, starting any one or more photoelectric detection modules to acquire the oscillation amplitude An of the travelling cable opposite to the photoelectric detection modules in real time, and similarly, when the travelling cable reflects light emitted by the light emitting tube to the light receiving tube through the cable body, the light receiving tube receiving the reflected light is regarded as effective, and the oscillation amplitude An is acquired by multiplying the distance between the light receiving tubes by the number of the effective tubes; calculating the current amplitude angle Cn according to the formulas (1) and (2);

Cn＝arctan(An/Dn),n＝1,2,...；

thirdly), an overrun judgment alarm step:

the obtained current swing angle Cn and a preset swing threshold value B_meanBy contrast, when Cn is greater than or equal to B_meanAnd reporting and alarming.

In one or more embodiments of the present invention, the maximum lateral swing Amax is 20 centimeters.

In one or more embodiments of the present invention, the photodetection module adopts a scanning detection mode, that is, only one photodetection module is activated at a time, and scanning detection is performed from top to bottom.

In one or more embodiments of the present invention, the distances Dn between the photoelectric detection modules and the cable holders at the bottom are multiple.

The invention has the beneficial effects that: utilize photoelectric detection module (photoelectric sensor promptly) direct to the retinue cable inlet wire to detect, what the feedback is the actual swing amplitude of cable, need not complicated arithmetic logic just can be accurate measure the swing amplitude of retinue cable, set up at least one photoelectric detection module according to the demand in addition, can realize the detection of cable swing amplitude with lower cost, have economic nature, technological and the practicality of preferred, be fit for popularizing and applying.

Drawings

Fig. 1 is a schematic diagram of a framework of a trailing cable swing amplitude detection system.

Fig. 2 is a schematic diagram of the structure of an elevator hoistway.

Fig. 3 is a schematic structural diagram of the photodetection module.

Fig. 4 is a schematic diagram of the transmitting circuit and the receiving circuit of the photodetection module.

Detailed Description

The scheme of the present application is further described below with reference to the accompanying drawings 1 to 4:

the system for detecting the swing amplitude of the traveling cable comprises at least one photoelectric detection module 2 which is arranged below a cable fixing frame 1 at the lowest end along the longitudinal direction of a well; a microcomputer system 3 connected with each photoelectric detection module 2 to obtain the swing amplitude of each detection point; the photoelectric detection module 2 comprises a row of light emitting tubes 21 and a row of light receiving tubes 22 which are arranged at equal intervals, and a microprocessor 23, wherein the microprocessor 23 acquires the effective tube number of the light receiving tubes to calculate the swing amplitude of the traveling cable which is just opposite to the light receiving tubes, and the microprocessor is in wired or wireless connection communication with the microcomputer system 3. The microcomputer system 3 adopts a single chip microcomputer, and is used for calculating and comparing data fed back by the photoelectric detection module 2, judging whether the swing amplitude of the traveling cable 4 is normal or not, and reporting to an upper system such as an elevator system for alarming when the swing amplitude exceeds the limit.

When a plurality of photoelectric detection modules 2 are arranged, the distances between the photoelectric detection modules 2 are equal, and the distance between the photoelectric detection module 2 and the first photoelectric detection module 2-1 is equal to the distance between the cable fixing frame 1 at the lowest end; namely, the distances of the photoelectric detection modules 2 relative to the cable fixing frame 1 at the lowest end are multiple relations. For example, the first photo-detection module 2-1 is disposed at 5 meters below the cable holder 1, and the second photo-detection module 2-2 is 5 meters away from the photo-detection module 2-1.

The distance d between the light emitting tubes 21 is 1-2 cm, the distance d between the light receiving tubes 22 is 1-2 cm, and the light emitting tubes 21 and the light receiving tubes 22 are paired one by one; for example, when the pitch d of the light receiving tubes 22 is set to 1 cm, and the traveling cable 4 reflects the light emitted from the light emitting tube 21 to the light receiving tubes 22 through the cable body, and there are 5 light receiving tubes 22 that receive the reflected light, the amplitude of oscillation is 5 cm when the pitch d of the light receiving tubes 22 is 1 cm and the number of effective tubes is 5.

Specifically, the transmitting circuit connected to the light emitting tube 21 includes a triode Q1, a light emitting tube and a current limiting resistor R1 are connected in series between the collector of the triode Q1 and the VCC terminal, the emitter thereof is grounded, and the base thereof is connected to and controlled by the microprocessor 23; the receiving circuit connected with the light receiving tube 22 comprises triodes Q2 and Q3, the triode Q2 is a PNP type triode, the emitter electrode of the triode Q2 is connected with a VCC end, the collector electrode of the triode Q is grounded by a resistor R2, and the base electrode of the triode Q is connected with the light receiving tube; the collector of the triode Q3 is connected with the VCC end and is connected to the microprocessor 23 by the collector as the output end, the emitter thereof is grounded, and the base thereof is connected with the collector of the triode Q2. The emitted signal can be modulated, and the distance can reach more than 20 cm.

The method for detecting the swing amplitude of the traveling cable comprises

Firstly), swing threshold setting step:

obtaining the distance Dn, n being 1,2, of each photoelectric detection module 2 relative to the lowermost cable fixing frame 1;

the elevator car 5 is moved to the bottommost layer, and the traveling cable 4 is shaken to swing at the maximum transverse swing amplitude Amax; at this time, any one or more photoelectric detection modules 2 acquire the swing amplitude An, n of the travelling cable 4 opposite to the photoelectric detection module 1, 2; when the traveling cable 4 reflects the light emitted by the light emitting tube 21 to the light receiving tube 22 through the cable body, the light receiving tube 22 receiving the reflected light is regarded as effective, and the swing An is obtained by multiplying the distance d between the light receiving tubes 22 by the number of effective tubes;

then, calculating according to the swing An and the distance Dn of the photoelectric detection module to obtain a corresponding maximum swing angle Bn, wherein n is 1, 2; the operation adopts the following formula:

tangent function tan (bn) ═ An/Dn; (1)

arctan function Bn ═ arctan (An/Dn); (2)

finally, taking the average value B of each maximum swing amplitude angle Bn_meanAs a swing threshold;

in the present embodiment, the maximum lateral swing Amax is 20cm, taking a height of 20 floors as an example, the maximum swingable length of the trailing cable 4 is 20 × 3 — 60 m, Bn — arctan (20/6000) ═ 0.19, about 10 degrees;

II) swing amplitude detection:

in the running process of the elevator, the photoelectric detection module 2 is started in turn from top to bottom in a scanning mode to obtain the oscillation amplitude An of the travelling cable 4 opposite to the photoelectric detection module in real time, similarly, when the travelling cable 4 reflects the light emitted by the light emitting tube 21 to the light receiving tube 22 through the cable body, the light receiving tube 22 receiving the reflected light is regarded as effective, and the oscillation amplitude An is obtained by multiplying the distance d between the light receiving tubes 22 by the number of the effective tubes; calculating the current amplitude angle Cn according to the formulas (1) and (2);

Cn＝arctan(An/Dn),n＝1,2,...；

thirdly), an overrun judgment alarm step:

the obtained current swing angle Cn and a preset swing threshold value B_meanBy contrast, when Cn is greater than or equal to B_meanAnd reporting and alarming.

The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.