CN113008188A - Elevator safety clearance measuring instrument and measuring method - Google Patents
Elevator safety clearance measuring instrument and measuring method Download PDFInfo
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- CN113008188A CN113008188A CN202110195808.XA CN202110195808A CN113008188A CN 113008188 A CN113008188 A CN 113008188A CN 202110195808 A CN202110195808 A CN 202110195808A CN 113008188 A CN113008188 A CN 113008188A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B29/00—Safety devices of escalators or moving walkways
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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Abstract
The invention discloses an elevator safety clearance measuring instrument and a measuring method, wherein a ruler body is provided with an acute-angle-shaped working end, two edges of an acute angle are respectively a reference edge and an idle edge, a holding part is connected with the ruler body through a force sensor, the force sensor is used for detecting an acting force between the holding part and the ruler body along the extension direction of the reference edge or vertical to the reference edge, a cantilever square beam is parallel to and spaced from the idle edge, the thickness direction of the cantilever square beam is vertical to the idle edge, one end of a thin section is connected with the ruler body, the other end of the thin section is connected with one end of a thick section, the other end of the thick section faces the reference edge, and a strain sensor is attached to the thin section and deviates from or faces the. The measuring instrument has a simple structure, is convenient to carry and operate, is reliable in measurement, and reduces the labor intensity of measurement work; and judging whether the measured gap is in a safety range or not according to the calculated gap width, and adjusting the gap by a worker according to the result, so that the potential safety hazard is eliminated, and the elevator taking safety of passengers is guaranteed.
Description
Technical Field
The invention relates to the field of safety detection of special equipment, in particular to an elevator safety clearance measuring instrument and a measuring method.
Background
Escalators and elevators (here, vertical elevators) have been widely used in airports, subways, stations, malls, supermarkets, movie theaters and other public places with dense pedestrian flows, and therefore their safety is more and more valued by regulatory agencies and the masses.
According to statistics, the extrusion accidents generated by the gaps between the mechanical parts of the escalator account for 43 percent of the total number of the accidents of the escalator. In the event of extrusion, the accident that the steps of the escalator and the apron plate clamp people is particularly common. Therefore, it is important to ensure that these gaps are within a safe range, which requires a reliable gap measurement instrument; after the gaps are measured, the gaps which deviate from the safety range are maintained and adjusted.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the elevator safety clearance measuring instrument which can reliably measure the elevator clearance and is further beneficial to eliminating potential safety hazards.
An elevator safety clearance measuring instrument according to an embodiment of a first aspect of the present invention includes a holding portion, a blade, a force sensor, a cantilever square beam, and a strain sensor, the blade is provided with an acute-angled working end, two sides of the acute angle are a reference side and an idle side, respectively, the holding portion is connected to the blade through the force sensor, the force sensor is used for detecting an acting force between the holding portion and the blade in a direction in which the reference side extends, or detecting an acting force between the holding portion and the blade perpendicular to the reference side, the cantilever square beam is parallel to and spaced from the idle side, the cantilever square beam includes a thin section and a thick section, a thickness direction of the cantilever square beam is perpendicular to the idle side, one end of the thin section is connected to the blade, and the other end of the thin section is connected to one end of the thick section, the other end of the thick section faces the reference edge, the strain sensor is attached to the thin section, and the strain sensor faces away from or faces the idle edge.
The elevator safety clearance measuring instrument according to the embodiment of the invention at least has the following beneficial effects: the measuring instrument has a simple structure, is convenient to carry and operate, and is reliable in measurement; the width of the measured gap is calculated manually or by the main control unit, whether the measured gap is in a safety range/an allowable range or not is judged according to the calculated width, and a worker adjusts the gap according to a comparison result, so that potential safety hazards are eliminated, and the safety of passengers taking the elevator is guaranteed; compared with the traditional measuring mode, the measuring method is more accurate; compared with other measuring modes, the simple and convenient measuring instrument reduces the labor intensity of the measuring work; the clearance measuring instrument further makes up the market blank, improves the science and technology and equipment level of quality monitoring work, actively promotes the development of quality monitoring industry, and has important significance for ensuring the safe operation and the safety of people.
According to some embodiments of the invention, the blade is in the shape of a right triangle, the free edge is the hypotenuse of the right triangle, the reference edge is the first leg of the right triangle, and the grip portion is connected to the second leg of the right triangle via the force sensor.
According to some embodiments of the invention, the measuring ruler further comprises a main control unit and a digital display screen, wherein the main control unit and the digital display screen are both arranged at the holding part or the ruler body, and the force sensor, the strain sensor and the digital display screen are all electrically connected with the main control unit.
According to some embodiments of the present invention, the holding portion is provided with a main control unit, a digital display screen and a key, the force sensor, the strain sensor, the digital display screen and the key are all electrically connected to the main control unit, the holding portion includes a first sub-cover and a second sub-cover detachably connected to the first sub-cover, and the main control unit is connected to an inner side of the first sub-cover or an inner side of the second sub-cover.
According to some embodiments of the invention, the grip portion includes a first sub-cover and a second sub-cover detachably coupled to the first sub-cover, a screw passing through the first sub-cover from an inner side of the first sub-cover and threadedly coupled to the force sensor, the screw fixedly coupling the first sub-cover and the force sensor.
According to some embodiments of the invention, the blade is provided with an operation hole, a screw passes through the blade from a side wall of the operation hole and is in threaded connection with the force sensor, and the screw fixedly connects the blade and the force sensor.
According to some embodiments of the invention, a protective cover or two protective sheets are connected to the grip portion, and the force sensor is arranged in the protective cover or between the two protective sheets.
According to some embodiments of the invention, the reference edge and the side of the cantilever square beam facing away from the blade are attached with a wear layer.
An elevator safety clearance measuring method according to an embodiment of a second aspect of the present invention includes the steps of:
the method comprises the following steps that the placement is started, a holding part drives a ruler body through a force sensor, so that the working end of the ruler body and a cantilever square beam start to enter a measured gap, and the force sensor is used for detecting the acting force between the holding part and the ruler body along the extension direction of a reference edge or detecting the acting force between the holding part and the ruler body perpendicular to the reference edge;
continuously placing the measuring tape into the gap to be measured, enabling the reference edge to be attached to one side wall of the gap to be measured, and enabling the ruler body and the cantilever square beam to continuously enter the gap to be measured along the extending direction of the reference edge;
the detection is followed, when the cantilever square beam is pushed by the other side wall of the detected gap, the strain sensor starts to detect, and the detection value xi of the strain sensor1Sending the main control unit, wherein the ruler body and the cantilever square beam continue to enter the measured gap, and the main control unit continues to enter the measured gapReceiving the detection value xi of the strain sensor1The main control unit also continuously receives the detection value of the force sensor;
data selection, when the ruler body and the cantilever square beam are put in place, the main control unit finds that the detection value of the strain sensor does not change within a certain time after reaching a peak value, and the main control unit selects xi1The detected value F of the force sensor at the moment of the occurrence of the peak value2Or F'2；
And (4) data calculation, namely calculating the width value delta of the measured gap according to the inherent dimension physical quantities on the ruler body and the cantilever square beam.
The elevator safety clearance measuring method provided by the embodiment of the invention at least has the following beneficial effects: the number of sensors required in essence is small, the physical quantity required to be identified is small, the measurement is reliable, and the labor intensity of the measurement work is reduced; the width of the measured gap is calculated manually or by the main control unit, whether the measured gap is in a safety range/an allowable range or not is judged according to the calculated width, and a worker adjusts the gap according to a comparison result, so that potential safety hazards are eliminated, and the safety of passengers taking the elevator is guaranteed; compared with the traditional measuring mode, the measuring method is more accurate.
According to some embodiments of the invention, the measured gap width value Δ calculated by the main control unit is sent to a digital display screen, the main control unit compares the width value Δ with an allowable range value stored in the main control unit, and when the width value Δ exceeds the allowable range value, the main control unit sends an alarm electric signal to one or more of the digital display screen, a buzzer and an alarm lamp.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view of an elevator safety clearance measuring instrument according to an embodiment of the present invention;
fig. 2 is a partial structural schematic view of the elevator safety clearance measuring instrument shown in fig. 1;
FIG. 3 is a front view of the structure shown in FIG. 2;
fig. 4 is a schematic view of the elevator safety clearance measuring instrument just after it is inserted into the measured clearance.
A holding part 100, a first sub-cover 110, a second sub-cover 120, a protective sheet 130;
a ruler body 200, a reference edge 210, an idle edge 220 and an operation hole 230;
a force sensor 300;
cantilever square beam 400, thin section 410, thick section 420;
a strain sensor 500;
a digital display screen 600;
a key 700.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The elevator of the invention comprises an escalator and a vertical elevator.
Referring to fig. 1, an elevator safety clearance measuring instrument according to a first embodiment of the present invention includes a holding portion 100, a blade 200, a force sensor 300, a cantilever square beam 400 and a strain sensor 500, the blade 200 is provided with an acute-shaped working end, two acute-angled sides are a reference side 210 and a rest side 220, respectively, the holding portion 100 is connected to the blade 200 through the force sensor 300, the force sensor 300 is used for detecting a force between the holding portion 100 and the blade 200 in a direction in which the reference side 210 extends, or for detecting a force between the holding portion 100 and the blade 200 perpendicular to the reference side 210, the cantilever square beam 400 is parallel to and spaced apart from the rest side 220, the cantilever square beam 400 includes a thin section 410 and a thick section 420, a thickness direction of the cantilever square beam 400 is perpendicular to the rest side 220, one end of the thin section 410 is connected to the blade 200, the other end of the thin section 410 is connected to one end of the thick section 420, and the other end of the thick section 420 faces the reference side 210, the strain sensor 500 is affixed to the thin section 410 with the strain sensor 500 facing away from or toward the resting edge 220.
Referring to fig. 3 to 4, the angle θ is an acute angle, the side on the left side of the angle θ is an idle side 220, and the side on the right side of the angle θ is a reference side 210; in operation, the reference edge 210 abuts against one sidewall of the gap to be measured, and the cantilever square beam 400 is pushed by the other sidewall of the gap to be measured and swings toward the reference edge 210. Referring to fig. 1 to 4, the operator can hold the holding portion 100 and then drive the ruler body 200 and the cantilever square beam 400 to be placed downwards into the gap to be measured.
The grip 100 is connected to the blade 200 via the force sensor 300, so that the blade 200 is carried by the force sensor 300 during operation. The force sensor 300 is used for detecting the force between the grip portion 100 and the blade 200 in the extending direction of the reference edge 210, or detecting the force between the grip portion 100 and the blade 200 perpendicular to the reference edge 210.
Referring to fig. 1 to 4, the cantilever square beam 400 is a cantilever beam with a rectangular cross section. Referring to fig. 1 to 4, in the idle state/normal state/non-operating state, the cantilever square beam 400 is entirely parallel to the idle side 220, a gap/interval is provided between the cantilever square beam 400 and the idle side 220, and the cantilever square beam 400 can have a pitch and yaw deformation ω within a certain range; in the idle state, the normal state, or the non-operating state, the intersection point H is formed between the extension line of the reference edge 210 and the left side of the cantilever square beam 400, and the intersection point H corresponds to an inherent dimensional physical quantity C of the cantilever square beam 400.
Referring to fig. 4, the force sensor 300 is used to detect the force in the up-down direction between the grip 100 and the blade 200, or to detect the force of the vertical reference edge 210 between the grip 100 and the blade 200. Referring to fig. 2 and 3, the strain sensor 500 is provided at the left and/or right side of the cantilever square beam 400 so that the strain sensor 500 faces away from or toward the idle side 220.
Referring to fig. 1 to 4, the cantilever square beam 400 extends along the direction of the idle side 220, the longitudinal direction of the cantilever square beam 400 is the extending direction, and the width direction of the cantilever square beam 400 is the front-rear direction. Referring to fig. 4, a small portion of the cantilever square beam 400 is embedded in the blade 200, the cantilever square beam 400 has a substantial total length l, a width b of the cantilever square beam 400, and a thickness h of a thin section 410 of the cantilever square beam 4001The thickness of the thick section 420 of the cantilever square beam 400 is h2The substantially deformable length d of the thin section 410 of the cantilever square beam 400.
A method for measuring the safety gap of elevator includes such steps as starting to put in the cage, continuously putting in it, detecting and following up, choosing data and calculating data.
Referring to fig. 4, when the user starts to set the measuring section 100, the user drives the blade 200 by the force sensor 300, so that the working end of the blade 200 and the cantilever beam 400 start to enter the gap to be measured, and the force sensor 300 is used for detecting the force between the measuring section 100 and the blade 200 in the direction in which the reference edge 210 extends, or for detecting the force between the measuring section 100 and the blade 200 perpendicular to the reference edge 210.
The base edge 210 is continuously inserted to abut against one side wall of the measured gap, and the blade 200 and the cantilever square beam 400 continuously enter the measured gap along the extending direction of the base edge 210.
Referring to fig. 4, when the cantilever square beam 400 is pushed by the other side wall of the gap to be detected, the strain sensor 500 starts to detect, and the detection value ξ of the strain sensor 500 is detected1The main control unit is sent, the ruler body 200 and the cantilever square beam 400 continue to enter the measured gap, and the main control unit continuously receives the detection value xi of the strain sensor 5001The main control unit also continuously receives the detection value of the force sensor 300.
Data is selected, when the ruler body 200 and the cantilever square beam 400 are put in place, the main control unit finds that the detection value of the strain sensor 500 does not change within a certain time after reaching a peak value, and the main control unit selects xi1Force sensor 300 detection value F at the time of the occurrence of a peak2Or F'2(F2Is a force F 'between the grip part 100 and the blade 200 in the direction in which the reference edge 210 extends'2The force of the vertical reference edge 210 between the grip 100 and the blade 200). Referring to FIG. 4, F2And F'2The measured known physical quantity is the moment that the cantilever square beam 400 is pushed by the side wall of the measured gap with the force F1At this time, the distance x between the stress point and the initial point of the cantilever square beam 400 is set; because the blade 200 has an inherent known physical quantity, "blade 200 working end angle θ", referring to FIG. 4, according to the space geometry and mechanics geometry:
And (4) calculating data, namely calculating the width value delta of the measured gap according to the inherent dimension physical quantity on the ruler body 200 and the cantilever square beam 400.
Wherein the inherently known physical quantities include: angle theta of working end of the blade 200, substantial total length l of the cantilever square beam 400, and cantilever squareWidth b of the beam 400, modulus of elasticity E established by the material of the cantilever square beam 400 itself, thickness h of the thin section 410 of the cantilever square beam 4001The thickness of the thick section 420 of the cantilever square beam 400 is h2A substantially deformable length d of the thin section 410 of the cantilever square beam 400, and a deformable amount ω of the thin section 410 in a thickness direction. According to mechanics knowledge, the cantilever square beam 400 is:
Cantilever square beam 400 balance
Substituting formulas (i) to (iii) into formula (iv), solving for x within the range of [ d, l ].
Referring to fig. 4, according to the geometric analysis: delta ═ C-x) sin θ - - -formula (v); substituting x obtained by solving into a formula (v), and calculating to obtain delta.
The elevator safety clearance measuring instrument and the measuring method provided by the embodiment of the invention at least have the following beneficial effects: the measuring instrument has a simple structure, is convenient to carry and operate, and is reliable in measurement; the width of the measured gap is calculated manually or by the main control unit, whether the measured gap is in a safety range/an allowable range or not is judged according to the calculated width, and a worker adjusts the gap according to a comparison result, so that potential safety hazards are eliminated, and the safety of passengers taking the elevator is guaranteed; compared with the traditional measuring mode, the measuring method is more accurate; compared with other measuring modes, the simple and convenient measuring instrument reduces the labor intensity of the measuring work; the clearance measuring instrument further makes up the market blank, improves the science and technology and equipment level of quality monitoring work, actively promotes the development of quality monitoring industry, and has important significance for ensuring the safe operation and the safety of people.
In actual use, the ruler body 200 can be in a certain specification, and the measuring instrument has a corresponding measurable range.
Referring to fig. 1-4, in some embodiments of the invention, the blade 200 is in the shape of a right triangle, the free edge 220 is the hypotenuse, the reference edge 210 is the first leg of the right triangle, and the grip 100 is connected to the second leg of the right triangle by a force sensor 300.
Referring to fig. 1 to 4, in some embodiments of the present invention, when the end surface of the other end of the thick section 420 is parallel to the reference edge 210 and the end surface abuts against one side wall of the gap to be measured and the cantilever square beam 400 is pushed by the other side wall of the gap to be measured, the measuring instrument cannot move down any more, and the detection value of the strain sensor 500 reaches a peak value and then does not change any more within a certain time.
Referring to fig. 1, in some embodiments of the present invention, a main control unit and a digital display screen 600 are further included, the main control unit and the digital display screen 600 are both disposed at the holding portion 100 or both disposed at the blade 200, and the force sensor 300, the strain sensor 500 and the digital display screen 600 are all electrically connected to the main control unit.
The main control unit is arranged in the holding part or in the ruler body, and the main control unit cannot be shown in figure 1. As known to those skilled in the art, the main control unit can be a common main control chip such as a PLC, a single chip microcomputer, a DSP and the like and an auxiliary circuit thereof; the main control unit may even be a motherboard unit of a computer that includes a central processing unit. In the present invention, the physical quantity parameters stored in the main control unit include the following: the angle θ of the working end of the blade 200, the substantial overall length l of the square cantilever beam 400, the width b of the square cantilever beam 400, the modulus of elasticity E established by the material of the square cantilever beam 400 itself, and the thickness h of the thin section 410 of the square cantilever beam 4001The thickness of the thick section 420 of the cantilever square beam 400 is h2A substantially deformable length d of the thin section 410 of the cantilever square beam 400, and a deformable amount ω of the thin section 410 in a thickness direction. The formulas stored in the main control unit include the formulas (i) to (v), and the allowable range of x stored in the main control unit is 0 (l-d)]. According to the stored inherent known quantity, the measured known quantity and the stored formula (physical quantity relation), the main control unit calculates the measured gap width value delta and reduces the operationCalculating time of data; the delta value calculated by the main control unit is transmitted to a digital display frequency, and an operator can intuitively know the measured gap width value delta through the digital display screen 600. The data is processed by the main control unit, the measured gap can be rapidly calculated, the detection efficiency and the detection precision are improved, the measured value of the measured gap can be intuitively known, and the reading is convenient.
In some embodiments of the invention, the physical quantities and F are determined by the master control unit according to the intrinsic dimensions2(or F'2) And calculating the width value delta of the measured gap, sending the measured gap width value delta calculated by the main control unit to the digital display screen 600, comparing the width value delta with an allowable range value stored by the main control unit, and sending an alarm electric signal to one or more of the digital display screen 600, the buzzer and the alarm lamp when the width value delta exceeds the allowable range value. On the circuit, the buzzer/warning lamp can be connected with a power supply voltage and an optical coupler in series, when the optical coupler receives the warning signal, the optical coupler is switched on, the buzzer/warning lamp is connected with the power supply voltage, the buzzer warns, and the warning lamp emits light.
Referring to fig. 1, in some embodiments of the present invention, the grip 100 is provided with a main control unit, a digital display 600, and keys 700, and the force sensor 300, the strain sensor 500, the digital display 600, and the keys 700 are all electrically connected to the main control unit. The holding part 100 includes a first sub-cover 110 and a second sub-cover 120 detachably connected to the first sub-cover 110, and the main control unit is connected to an inner side of the first sub-cover 110 or an inner side of the second sub-cover 120. The holding part 100 includes a first sub cover 110 and a second sub cover 120, the holding part 100 is provided in the form of a housing, and the holding part 100 can accommodate certain electric elements, circuit boards, and the like, such as a main control unit, a key circuit board, and the like. Referring to fig. 1, when the grip 100 is held, the digital display 600 can be faced to the operator.
In some embodiments of the present invention, the grip 100 is provided in a rod shape.
Referring to fig. 1 and 2, in some embodiments of the present invention, the grip 100 includes a first cover 110 and a second cover 120 detachably coupled to the first cover 110, a screw passing through the first cover 110 from an inner side of the first cover 110 and threadedly coupled to the force sensor 300, the screw fixedly coupling the first cover 110 and the force sensor 300. The screw is arranged in a hidden manner, so that other objects are prevented from being placed on the screw when the measured gap is measured, or the hand of a user is prevented from being placed on the screw, and the influence of the screw on the measurement work is avoided; in addition, the measuring instrument of the invention is more beautiful.
One of the first sub-cover 110 and the second sub-cover 120 is a front cover, and the other is a rear cover.
Referring to fig. 1 and 2, in some embodiments of the present invention, the blade 200 is provided with an operation hole 230, a screw passes through the blade 200 from the side wall of the operation hole 230 and is screwed to the force sensor 300, and the screw fixedly connects the blade 200 and the force sensor 300. The screw is arranged in a hidden manner, so that other objects are prevented from being placed on the screw when the measured gap is measured, or the hand of a user is prevented from being placed on the screw, and the influence of the screw on the measurement work is avoided; in addition, the measuring instrument of the invention is more beautiful.
Referring to fig. 1, in some embodiments of the present invention, a protective cover or two protective sheets 130 are attached to the grip 100, and the force sensor 300 is disposed in the protective cover or between the two protective sheets 130. The holding part 100 can be detachably connected to the protective cover or the two protective sheets 130, that is, the protective cover or the two protective sheets 130 can be detached from the holding part 100; the holding portion 100 may be integrally formed with the protective cover/two protective sheets 130, that is, the holding portion 100 is protruded from the protective cover or two protective sheets 130. The force sensor 300 is disposed in a protective cover or between two protective sheets 130, and the force sensor 300 is protected in isolation. The two screws can be further designed in a hidden mode, the two screws are arranged in the protective cover or between the two protective sheets 130, the two screws are also isolated, and the measuring instrument is simple and attractive.
The two protection sheets 130 may be designed on the same sub-cover, or may be designed on the corresponding sub-covers.
In some embodiments of the invention, the reference edge 210 is attached with a wear layer and the side of the cantilever square beam 400 facing away from the blade 200 is attached with a wear layer. The wear-resistant layer is made of one of PPS, ceramic, graphite, polytetrafluoroethylene (Teflon), molybdenum disulfide, iron and steel. The equivalent is that the blade 200 is made of wear-resistant material.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. An elevator safety clearance measuring instrument, comprising:
a grip portion (100);
the ruler comprises a ruler body (200) and a ruler handle, wherein the ruler body is provided with an acute-angle-shaped working end, and two edges of the acute angle are a reference edge (210) and an idle edge (220) respectively;
the force sensor (300) is used for detecting the acting force between the holding part (100) and the ruler body (200) along the extending direction of the reference edge (210) or detecting the acting force between the holding part (100) and the ruler body (200) perpendicular to the reference edge (210);
the cantilever square beam (400) is parallel to and spaced from the idle edge (220) and comprises a thin section (410) and a thick section (420), the thickness direction of the cantilever square beam (400) is perpendicular to the idle edge (220), one end of the thin section (410) is connected with the ruler body (200), the other end of the thin section (410) is connected with one end of the thick section (420), and the other end of the thick section (420) faces the reference edge (210);
a strain sensor (500) affixed to the thin section (410), the strain sensor (500) facing away from or toward the resting edge (220).
2. The elevator safety clearance measuring instrument according to claim 1, wherein the blade (200) has a right triangle shape, the idle side (220) is a hypotenuse of the right triangle, the reference side (210) is a first leg of the right triangle, and the holding part (100) is connected to a second leg of the right triangle through the force sensor (300).
3. The elevator safety clearance measuring instrument according to claim 1 or 2, further comprising a main control unit and a digital display screen (600), wherein the main control unit and the digital display screen (600) are both disposed at the holding part (100) or both disposed at the blade (200), and the force sensor (300), the strain sensor (500) and the digital display screen (600) are all electrically connected to the main control unit.
4. The elevator safety clearance measuring instrument according to claim 1 or 2, wherein the grip portion (100) is provided with a main control unit, a digital display screen (600) and a key (700), the force sensor (300), the strain sensor (500), the digital display screen (600) and the key (700) are all electrically connected to the main control unit, the grip portion (100) comprises a first sub cover (110) and a second sub cover (120) detachably connected to the first sub cover (110), and the main control unit is connected to an inner side of the first sub cover (110) or an inner side of the second sub cover (120).
5. The elevator safety clearance measuring instrument according to claim 1 or 2, wherein the grip portion (100) includes a first sub-cover (110) and a second sub-cover (120) detachably coupled to the first sub-cover (110), a screw passing through the first sub-cover (110) from an inner side of the first sub-cover (110) and threadedly coupled to the force sensor (300), the screw fixedly coupling the first sub-cover (110) and the force sensor (300).
6. The elevator safety clearance measuring instrument according to claim 1 or 2, wherein the blade (200) is provided with an operation hole (230), a screw passing through the blade (200) from a side wall of the operation hole (230) and threadedly coupled to the force sensor (300), the screw fixedly coupling the blade (200) and the force sensor (300).
7. The elevator safety clearance measuring instrument according to claim 1 or 2, wherein a protective cover or two protective sheets (130) are connected to the grip portion (100), and the force sensor (300) is disposed in the protective cover or between the two protective sheets (130).
8. The elevator safety clearance measuring instrument according to claim 1 or 2, wherein a wear resistant layer is attached to the reference edge (210) and a side of the cantilever square beam (400) facing away from the blade (200).
9. An elevator safety clearance measuring method is characterized by comprising the following steps:
starting to place the measuring tool, wherein a holding part (100) drives a tool body (200) through a force sensor (300), so that a working end of the tool body (200) and a cantilever square beam (400) start to enter a measured gap, and the force sensor (300) is used for detecting the acting force between the holding part (100) and the tool body (200) along the extending direction of a reference edge (210) or detecting the acting force of a vertical reference edge (210) between the holding part (100) and the tool body (200);
continuously putting the reference edge (210) against one side wall of the measured gap, and continuously entering the measured gap by the ruler body (200) and the cantilever square beam (400) along the extension direction of the reference edge (210);
the detection is followed, when the cantilever square beam (400) is pushed by the other side wall of the detected gap, the strain sensor (500) starts to detect, and the detection value xi of the strain sensor (500)1The ruler body (200) and the cantilever square beam (400) continue to enter the measured gap, and the main control unit continuously receives a detection value xi of the strain sensor (500)1The main control unit also continuously receives the detection value of the force sensor (300);
data selection, when the ruler body (200) and the cantilever square beam (400) are put in place, the main control unit finds that the detection value of the strain sensor (500) does not change within a certain time after reaching a peak value, and selects xi from the main control unit1Just before the occurrence ofThe detected value F of the force sensor (300) at the peak value2Or F'2；
And (3) calculating data, namely calculating the width value delta of the measured gap according to the inherent dimension physical quantities on the ruler body (200) and the cantilever square beam (400).
10. The elevator safety clearance measurement method according to claim 9, wherein the measured clearance width value Δ calculated by the main control unit is transmitted to a digital display screen (600), the main control unit compares the width value Δ with an allowable range value stored in the main control unit, and when the width value Δ exceeds the allowable range value, the main control unit transmits an alarm electric signal to one or more of the digital display screen (600), a buzzer and an alarm lamp.
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