CN212832321U - Escalator speed detection device - Google Patents
Escalator speed detection device Download PDFInfo
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- CN212832321U CN212832321U CN202021398839.2U CN202021398839U CN212832321U CN 212832321 U CN212832321 U CN 212832321U CN 202021398839 U CN202021398839 U CN 202021398839U CN 212832321 U CN212832321 U CN 212832321U
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Abstract
The utility model discloses an automatic staircase speed detection device, include: the detection disc is coaxially arranged on a driving main shaft of the escalator and is provided with a circle of detected features which are formed on the detection disc and are uniformly distributed at intervals in the circumferential direction; the electromagnetic sensor is arranged near the detection disc and is used for detecting the detected features on the detection disc and generating detection signals; and the micro central processing unit is used for calculating the rotating speed of the driving spindle according to the detection signals and the number of the detected characteristics. The utility model discloses in, a detection dish for speed detects is installed on the drive main shaft of staircase, can change alone, has practiced thrift the cost to easy dismounting.
Description
Technical Field
The utility model relates to an automatic staircase speed detection device.
Background
The CEA standard of the latest technical specification of the escalator for the subway and the detection of overspeed and non-operation reversion of the escalator are to directly measure step speed or the rotating speed of a main driving shaft or a chain wheel assembled on the main driving shaft to determine the actual running speed and direction of the escalator.
Patent document WO2018108560a1 discloses a detection device capable of directly detecting the rotational speed of a sprocket. However, in this patent document, the teeth for speed detection are directly formed on the inner peripheral surface of the sprocket, which results in that the number of teeth cannot be changed as required for the actual speed detection accuracy. If the speed detection accuracy is to be improved, only the entire sprocket can be replaced, which results in a great waste because the manufacturing cost of the sprocket is high.
SUMMERY OF THE UTILITY MODEL
The object of the present invention is to solve at least one of the above problems and drawbacks existing in the prior art.
According to the utility model discloses an aspect provides an automatic staircase speed detection device, include: the detection disc is coaxially arranged on a driving main shaft of the escalator and is provided with a circle of detected features which are formed on the detection disc and are uniformly distributed at intervals in the circumferential direction; the electromagnetic sensor is arranged near the detection disc and is used for detecting the detected features on the detection disc and generating detection signals; and the micro central processing unit is used for calculating the rotating speed of the driving spindle according to the detection signals and the number of the detected characteristics.
According to an exemplary embodiment of the invention, the test plate is divided into two plate-like halves and assembled from the two plate-like halves,
according to another exemplary embodiment of the present invention, the escalator speed detection device further comprises at least two pairs of first clamping plates spanning the splicing seams of the two disc-shaped halves; each pair of first clamping plates respectively abut against two opposite surfaces of the detection plate, and two ends of each pair of first clamping plates are respectively detachably fastened together through threaded fasteners so as to clamp the two plate-shaped half bodies together.
According to another exemplary embodiment of the present invention, the escalator speed detecting device further includes a flange plate, the detection plate passes through the flange plate is fixed to the driving main shaft.
According to another exemplary embodiment of the present invention, the flange is assembled from two flange halves, and the two flange halves are embraced on the drive spindle.
According to another exemplary embodiment of the present invention, the escalator speed detecting device further comprises at least two pairs of second clamping plates spanning the splicing seams of the two flange half bodies; one of the second clamping plates of each pair abuts against the surface of the flange plate, which is opposite to the detection plate, and the other second clamping plate abuts against the surface of the detection plate, which is opposite to the flange plate; and both ends of each pair of second clamping plates are detachably fastened together by threaded fasteners, respectively, so as to clamp the test plate and the flange plate together in the axial direction.
According to another exemplary embodiment of the present invention, a plurality of radial threaded holes are formed on the flange plate and the circumferential surface of the drive spindle, and the flange plate is fixed to the drive spindle by bolts screwed into the radial threaded holes.
According to another exemplary embodiment of the present invention, a plurality of radial pin holes are formed on the flange plate and the circumferential surface of the drive spindle, and the flange plate is positioned on the drive spindle by pins inserted into the radial pin holes, so as to prevent the flange plate from moving axially and circumferentially relative to the drive spindle.
According to another exemplary embodiment of the present invention, a plurality of axial connection holes are formed on the detection plate and the flange plate, and the detection plate and the flange plate are fastened together by a bolt fastening assembly passing through the axial connection holes.
According to another exemplary embodiment of the present invention, the escalator speed detecting device further includes a sensor mounting bracket, the sensor mounting bracket is fixed to the truss of the escalator, and the electromagnetic sensor is installed on the sensor mounting bracket.
According to another exemplary embodiment of the present invention, the electromagnetic sensor faces axially the detected feature on the detection plate and has a gap between them.
According to another exemplary embodiment of the present invention, be formed with on the sensor installing support with threaded connection hole be formed with on electromagnetic sensor's the casing with threaded connection hole complex screw thread, electromagnetic sensor threaded connection is in on the sensor installing support to the accessible is rotatory electromagnetic sensor adjusts electromagnetic sensor with detect the clearance between the dish.
According to another exemplary embodiment of the present invention, a plurality of protection bolts are installed on the sensor mounting bracket, and the plurality of protection bolts are distributed in the outside of the electromagnetic sensor to prevent the detection plate from colliding with the electromagnetic sensor.
According to another exemplary embodiment of the present invention, the circle of detected features on the detection plate comprises a circle of slots and the shape of the slots comprises a kidney shape, a square shape or a circular shape.
According to another exemplary embodiment of the present invention, the circle of detected features on the detection plate comprises a circle of gear teeth.
According to another exemplary embodiment of the present invention, the number of detected features of one circle on the detection plate is not less than 400.
According to another exemplary embodiment of the present invention, the escalator speed detecting device includes two electromagnetic sensors, one of the two electromagnetic sensors is used for generating and outputting a first detection signal, the other is used for generating and outputting a second detection signal, and a predetermined phase difference is provided between the first detection signal and the second detection signal; the micro central processing unit further comprises a rotation direction judging unit, and the rotation direction judging unit can determine the rotation direction of the driving spindle according to the phase relation between the first detection signal and the second detection signal.
According to another exemplary embodiment of the present invention, the escalator speed detecting device further includes a signal processing circuit, and the signal processing circuit can receive the detection signal outputted from the sensor and process the received detection signal; the micro central processing unit is communicated with the signal processing circuit and can receive the detection signal processed by the signal processing circuit.
According to the utility model discloses a further exemplary embodiment, little central processing unit still includes acceleration computing element, acceleration computing element can be according to the rotational speed that speed computing element calculated calculates the acceleration of drive spindle.
According to another exemplary embodiment of the present invention, the micro central processing unit further comprises: an overspeed judgment unit capable of judging whether the speed calculated by the speed calculation unit is higher than the maximum rotation speed allowed by the drive spindle; and an underspeed determination unit capable of determining whether the speed calculated by the speed calculation unit is lower than a minimum rotation speed allowed by the drive spindle.
In according to each aforementioned exemplary embodiment of the utility model discloses, the detection dish that is used for speed to detect is installed on the drive main shaft of staircase, can change alone to easy dismounting.
Other objects and advantages of the present invention will become apparent from the following description of the invention, which is made with reference to the accompanying drawings, and can help to provide a thorough understanding of the present invention.
Drawings
Fig. 1 shows a schematic perspective view of an escalator speed detection device according to an exemplary embodiment of the present invention;
fig. 2 shows a plan view of the escalator speed detecting device in fig. 1;
fig. 3 shows a perspective view of a detection pan of the escalator speed detection device of fig. 1;
fig. 4 shows a schematic view of the installation of the electromagnetic sensor of the escalator speed detecting device in fig. 1;
FIG. 5 shows two detection signals output by the electromagnetic sensor of FIG. 1;
fig. 6 shows a functional block diagram of the processing and calculation of the detection signal.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the drawings is intended to explain the general inventive concept and should not be construed as limiting the invention.
Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.
According to the utility model discloses a general technical concept provides an automatic staircase speed detection device, include: the detection disc is coaxially arranged on a driving main shaft of the escalator and is provided with a circle of detected features which are formed on the detection disc and are uniformly distributed at intervals in the circumferential direction; the electromagnetic sensor is arranged near the detection disc and is used for detecting the detected features on the detection disc and generating detection signals; and the micro central processing unit is used for calculating the rotating speed of the driving spindle according to the detection signals and the number of the detected characteristics.
Fig. 1 shows a schematic perspective view of an escalator speed detection device according to an exemplary embodiment of the present invention; fig. 6 shows a functional block diagram of the processing and calculation of the detection signal.
As shown in fig. 1 and 6, in the illustrated embodiment, the escalator speed detecting device mainly includes: test tray 100, electromagnetic sensor 300, and micro-cpu 500.
Fig. 3 shows a perspective view of the detection pan 100 of the escalator speed detection device in fig. 1.
As shown in fig. 1, 3 and 6, in the illustrated embodiment, the detection plate 100 is coaxially mounted on the drive spindle 10 of the escalator. A ring of inspected features 100a is formed on the inspection plate 100. A circle of the detected features 100a is evenly spaced in the circumferential direction of the detection disk 100.
Fig. 5 shows two detection signals A, B output by the electromagnetic sensor 300 of fig. 1.
As shown in fig. 1, 3, and 5-6, in the illustrated embodiment, an electromagnetic sensor 300 is disposed proximate to test plate 100 for sensing a sensed feature 100a on test plate 100 and generating a sense signal A, B. The micro cpu 500 includes a speed calculation unit capable of calculating the rotation speed of the driving spindle 10 according to the following formula (1),
n 60F/m (1), wherein
n is the rotational speed of the drive spindle 10, in rpm,
f is the frequency of the detection signal detected by the electromagnetic sensor 300, in Hz,
m is the number of detected features 100a on the detection disc 100.
As shown in fig. 1, 3 and 5-6, in the illustrated embodiment, the test plate 100 is divided into two plate-like halves 110 and assembled from the two plate-like halves 110.
As shown in fig. 1, 3 and 5-6, in the illustrated embodiment, the escalator speed detecting device further includes at least two pairs of first clamping plates 101 spanning the splice seam of the two disk-like halves 110. Each pair of first clamping plates 101 abuts on the opposite surfaces of the test tray 100, respectively, and both ends of each pair of first clamping plates 101 are detachably fastened together by threaded fasteners, respectively, thereby clamping the two plate-like halves 110 together.
Fig. 2 shows a plan view of the escalator speed detecting device in fig. 1.
As shown in fig. 1-3 and 5-6, in the illustrated embodiment, the escalator speed detecting device further includes a flange 200, and the detecting plate 100 is fixed to the drive shaft 10 through the flange 200.
As shown in fig. 1-3 and 5-6, in the illustrated embodiment, the flange 200 is assembled from two flange halves 210, and the two flange halves 210 are carried on the drive shaft 10.
As shown in fig. 1-3 and 5-6, in the illustrated embodiment, the escalator speed sensing device further includes at least two pairs of second clamp plates 201 spanning the splice seams of the two flange halves 210. One of the second clamping plates 201 of each pair abuts against the surface of the flange 200 facing away from the test plate 100, and the other abuts against the surface of the test plate 100 facing away from the flange 200. Both ends of each pair of second clamping plates 201 are detachably fastened together by threaded fasteners, respectively, thereby clamping the test plate 100 and the flange plate 200 together in the axial direction.
As shown in fig. 1 to 3 and 5 to 6, in the illustrated embodiment, a plurality of radial screw holes are formed on the peripheral surfaces of the flange 200 and the drive spindle 10, and the flange 200 is fixed to the drive spindle 10 by bolts 2a screwed into the radial screw holes.
As shown in fig. 1 to 3 and 5 to 6, in the illustrated embodiment, a plurality of radial pin holes are formed on the circumferential surfaces of the flange 200 and the drive spindle 10, and the flange 200 is positioned on the drive spindle 10 by pins 2b inserted into the radial pin holes to prevent the flange 200 from moving axially and circumferentially with respect to the drive spindle 10.
As shown in fig. 1 to 3 and 5 to 6, in the illustrated embodiment, a plurality of axial coupling holes are formed in the test plate 100 and the flange 200, and the test plate 100 and the flange 200 are fastened together by a bolt fastening assembly 2c passing through the axial coupling holes.
Fig. 4 shows a schematic view of the installation of the electromagnetic sensor 300 of the escalator speed detecting device in fig. 1.
As shown in fig. 1 to 6, in the illustrated embodiment, the escalator speed detecting device further includes a sensor mounting bracket 310. The sensor mounting bracket 310 is secured to a truss (not shown) of the escalator. The electromagnetic sensor 300 is mounted on a sensor mounting bracket 310.
As shown in fig. 1-6, in the illustrated embodiment, the electromagnetic sensor 300 faces the inspected feature 100a on the inspection plate 100 in an axial direction with a gap from the inspection plate 100.
As shown in fig. 1 to 6, in the illustrated embodiment, a screw coupling hole is formed on the sensor mounting bracket 310, a screw that is engaged with the screw coupling hole is formed on the housing of the electromagnetic sensor 300, and the electromagnetic sensor 300 is screw-coupled to the sensor mounting bracket 310, so that the gap between the electromagnetic sensor 300 and the detection plate 100 can be adjusted by rotating the electromagnetic sensor 300.
As shown in fig. 1 to 6, in the illustrated embodiment, a plurality of protection bolts 320 are mounted on the sensor mounting bracket 310. A plurality of protection bolts 320 are distributed outside the electromagnetic sensor 300 to prevent the detection plate 100 from colliding against the electromagnetic sensor 300.
As shown in fig. 1-6, in the illustrated embodiment, the ring of detected features 100a on the detection plate 100 includes a ring of slots, and the shape of the slots may include a kidney shape, a square shape, or a circular shape. However, the present invention is not limited to the illustrated embodiment, and for example, the circle of detected features 100a on the detection plate 100 may be a circle of teeth.
As shown in fig. 1-6, in the illustrated embodiment, the number of one ring of detected features 100a on the detection tray 100 is not less than 400. The number of detected features 100a depends on the requirement of detection accuracy, and the greater the number, the higher the detection accuracy.
As shown in fig. 1 to 6, in the illustrated embodiment, the escalator speed detecting device includes two electromagnetic sensors 300, one of the two electromagnetic sensors 300 is used to generate and output a first detection signal a, and the other is used to generate and output a second detection signal B, and the first detection signal a and the second detection signal B have a predetermined phase difference therebetween. The micro cpu 500 further includes a rotation direction determination unit capable of determining the rotation direction of the drive spindle 10 based on the phase relationship between the first detection signal a and the second detection signal B. For example, as shown in fig. 5, when the driving spindle 10 rotates in the normal positive rotation direction, the rising edge of the second detection signal B leads the rising edge of the first detection signal a by a predetermined phase difference. In contrast, if the main spindle 10 is driven to rotate in an abnormal reverse rotational direction, the rising edge of the first detection signal a leads the rising edge of the second detection signal B by a predetermined phase difference. In this way, the actual direction of rotation of the drive spindle 10 can be determined.
As shown in fig. 1 to 6, in the illustrated embodiment, the escalator speed detecting device further includes a signal processing circuit 400, and the signal processing circuit 400 can receive the detection signal A, B output by the sensor 300 and process the received detection signal A, B. The micro cpu 500 communicates with the signal processing circuit 400 and is capable of receiving the detection signal A, B processed by the signal processing circuit 400.
As shown in fig. 1 to 6, in the illustrated embodiment, the micro cpu 500 further includes an acceleration calculating unit capable of calculating the acceleration of the drive spindle 10 from the rotational speed calculated by the speed calculating unit.
As shown in fig. 1 to 6, in the illustrated embodiment, the micro cpu 500 further includes: an overspeed judgment unit capable of judging whether the speed calculated by the speed calculation unit is higher than the maximum rotation speed allowed by the drive spindle 10; and an underspeed determination unit capable of determining whether the speed calculated by the speed calculation unit is lower than the minimum rotation speed allowed for driving the main spindle 10.
As shown in fig. 1 to 6, in the illustrated embodiment, when the overspeed judging unit determines that the speed calculated by the speed calculating unit is higher than the maximum rotation speed allowed by the driving main shaft 10, the micro cpu 500 sends an overspeed safety control signal to the safety control circuit 600 of the escalator, and the safety control circuit 600 starts the elevator stopping protection device according to the overspeed safety control signal.
As shown in fig. 1 to 6, in the illustrated embodiment, when the underspeed determining unit determines that the speed calculated by the speed calculating unit is lower than the minimum rotation speed allowed by the driving main shaft 10, the micro central processing unit 500 sends an underspeed safety control signal to the safety control circuit 600 of the escalator, and the safety control circuit 600 starts the elevator stopping protection device according to the underspeed safety control signal.
As shown in fig. 1 to 6, in the illustrated embodiment, when the direction determination unit determines that the rotation direction of the driving spindle 10 is an abnormal reverse rotation direction, the micro cpu 500 sends a reverse safety control signal to the safety control circuit 600 of the escalator, and the safety control circuit 600 starts the escalator stopping protection device according to the reverse safety control signal.
In an exemplary embodiment of the present invention, the signal processing circuit 400 can filter out high-frequency interference signals, protect the input signals from overvoltage, and convert the voltages thereof.
It will be appreciated by those skilled in the art that the embodiments described above are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without conflict in structure or principle.
Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplify preferred embodiments of the present invention, and should not be construed as limiting the present invention.
Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.
It should be noted that the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude a plurality. Additionally, any element numbers of the claims should not be construed as limiting the scope of the invention.
Claims (20)
1. An escalator speed detection device, comprising:
the detection disc (100) is coaxially arranged on a driving main shaft (10) of the escalator and is provided with a circle of detected features (100a) which are formed on the detection disc and are uniformly distributed at intervals in the circumferential direction;
an electromagnetic sensor (300) disposed in proximity to the test plate (100) for detecting a detected feature (100a) on the test plate (100) and generating a detection signal (A, B); and
and the micro central processing unit (500) is used for calculating the rotating speed of the driving spindle (10) according to the detection signals and the number of the detected characteristics.
2. The escalator speed detecting device according to claim 1, characterized in that: the test plate (100) is assembled from two plate-like halves (110).
3. The escalator speed detecting device according to claim 2, characterized in that:
the escalator speed detection device further comprises at least two pairs of first clamping plates (101) spanning the splicing seams of the two disc-shaped half bodies (110);
each pair of first clamping plates (101) respectively abut against two opposite surfaces of the detection plate (100), and both ends of each pair of first clamping plates (101) are respectively detachably fastened together through threaded fasteners so as to clamp the two plate-shaped half bodies (110) together.
4. The escalator speed detecting device according to claim 3, characterized in that:
the escalator speed detection device also comprises a flange plate (200), and the detection plate (100) is fixed on the driving main shaft (10) through the flange plate (200).
5. The escalator speed detecting device according to claim 4, wherein:
the flange (200) is formed by assembling two flange half bodies (210), and the two flange half bodies (210) are embraced on the driving main shaft (10).
6. The escalator speed detecting device according to claim 5, wherein:
the escalator speed detection device also comprises at least two pairs of second clamping plates (201) which span the splicing seams of the two flange half bodies (210);
one of the second clamping plates (201) of each pair abuts against the surface of the flange plate (200) opposite to the detection plate (100), and the other abuts against the surface of the detection plate (100) opposite to the flange plate (200); and is
The two ends of each pair of second clamping plates (201) are detachably fastened together through threaded fasteners respectively, so that the detection disc (100) and the flange plate (200) are clamped together in the axial direction.
7. The escalator speed detecting device according to claim 4, wherein:
a plurality of radial threaded holes are formed in the peripheral surfaces of the flange plate (200) and the drive main shaft (10), and the flange plate (200) is fixed to the drive main shaft (10) by bolts (2a) screwed into the radial threaded holes.
8. The escalator speed detecting device according to claim 7, wherein:
a plurality of radial pin holes are formed on the peripheral surfaces of the flange plate (200) and the driving main shaft (10), and the flange plate (200) is positioned on the driving main shaft (10) through pins (2b) inserted into the radial pin holes so as to prevent the flange plate (200) from moving axially and circumferentially relative to the driving main shaft (10).
9. The escalator speed detecting device according to claim 4, wherein:
a plurality of axial connecting holes are formed in the test plate (100) and the flange plate (200), and the test plate (100) and the flange plate (200) are fastened together by a bolt fastening assembly (2c) passing through the axial connecting holes.
10. The escalator speed detecting device according to claim 1, characterized in that:
the escalator speed detection device further comprises a sensor mounting bracket (310), wherein the sensor mounting bracket (310) is fixed to a truss of the escalator, and the electromagnetic sensor (300) is mounted on the sensor mounting bracket (310).
11. The escalator speed detecting device according to claim 10, wherein:
the electromagnetic sensor (300) faces axially a feature (100a) to be detected on the detection disc (100) with a clearance from the detection disc (100).
12. The escalator speed detecting device according to claim 11, wherein:
a screw coupling hole is formed on the sensor mounting bracket (310), a screw thread engaged with the screw coupling hole is formed on a housing of the electromagnetic sensor (300), and the electromagnetic sensor (300) is screw-coupled to the sensor mounting bracket (310), so that a gap between the electromagnetic sensor (300) and the detection plate (100) can be adjusted by rotating the electromagnetic sensor (300).
13. The escalator speed detecting device according to claim 10, wherein:
a plurality of protective bolts (320) are mounted on the sensor mounting bracket (310), and the protective bolts (320) are distributed on the outer side of the electromagnetic sensor (300) to prevent the detection plate (100) from colliding with the electromagnetic sensor (300).
14. The escalator speed detecting device according to claim 1, characterized in that:
the circle of detected features (100a) on the detection plate (100) comprises a circle of slots and the shape of the slots comprises a kidney shape, a square shape or a circular shape.
15. The escalator speed detecting device according to claim 1, characterized in that: a ring of sensed features (100a) on the sensing plate (100) includes a ring of gear teeth.
16. The escalator speed detecting device according to claim 1, characterized in that:
the number of one circle of detected features (100a) on the detection disc (100) is not less than 400.
17. The escalator speed detecting device according to claim 1, characterized in that:
the escalator speed detection device comprises two electromagnetic sensors (300), one of the two electromagnetic sensors (300) is used for generating and outputting a first detection signal (A), the other one is used for generating and outputting a second detection signal (B), and a predetermined phase difference exists between the first detection signal (A) and the second detection signal (B);
the micro central processing unit (500) further comprises a rotation direction determination unit capable of determining the rotation direction of the drive spindle (10) from the phase relationship between the first detection signal (a) and the second detection signal (B).
18. The escalator speed detecting device according to claim 17, wherein:
the escalator speed detection device further comprises a signal processing circuit (400), wherein the signal processing circuit (400) can receive the detection signal (A, B) output by the sensor (300) and process the received detection signal (A, B);
the micro central processing unit (500) is in communication with the signal processing circuit (400) and is capable of receiving the detection signal (A, B) processed by the signal processing circuit (400).
19. The escalator speed detecting device according to claim 1, characterized in that:
the micro central processing unit (500) further comprises an acceleration calculation unit capable of calculating the acceleration of the drive spindle (10) according to the rotational speed calculated by the speed calculation unit of the micro central processing unit (500).
20. Escalator speed detection device according to claim 1, characterized by the fact that said micro-central processing unit (500) further comprises:
an overspeed judgment unit capable of judging whether the speed calculated by the speed calculation unit of the micro cpu (500) is higher than the maximum rotation speed allowed by the drive spindle (10); and
and an underspeed determination unit capable of determining whether the speed calculated by the speed calculation unit of the micro cpu (500) is lower than the minimum rotation speed allowed for the drive spindle (10).
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| CN202021398839.2U CN212832321U (en) | 2020-07-16 | 2020-07-16 | Escalator speed detection device |
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| CN202021398839.2U CN212832321U (en) | 2020-07-16 | 2020-07-16 | Escalator speed detection device |
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