An escalator handrail and step speed deviation detector based on AT89C51 single chip microcomputer

Abstract

The invention provides an escalator handrail and step speed deviation detector based on an AT89C51 single-chip microcomputer. The detector comprises: a base, a vertical pole, a flip arm, a rotating arm, an ultrasonic rangefinder, and a target block. The vertical pole is vertically arranged on the base and is rotatable. A first notch is provided at the end of the vertical pole. One end of the flip arm is hingedly arranged in the first notch of the vertical pole, and the flip arm can be flipped up and down on the vertical pole. One end of the rotating arm is rotatably arranged at the other end of the flip arm. A second notch is provided at the other end of the rotating arm. The ultrasonic rangefinder is hingedly arranged in the second notch of the rotating arm. The target block is located on the escalator handrail. The ultrasonic rangefinder comprises the AT89C51 single-chip microcomputer, a reset module, a step speed setting module, an ultrasonic rangefinder module, and a display module. The detector can achieve real-time control and non-contact measurement, thereby improving detection accuracy.

Description

Technical Field

[0001] The present invention relates to the field of escalator and moving walkway inspection, and more particularly to an escalator handrail and step speed deviation detector based on the AT89C51 single-chip microcomputer. Specifically, the invention discloses a detector that can be conveniently mounted on an escalator or moving walkway and can quickly measure and accurately display the actual speed deviation between the handrail and the steps, pallets, or belt. Background Art

[0002] The escalator supervisory inspection and periodic inspection standards require that "the permissible deviation of the handrail's operating speed relative to the actual speed of the steps, pallets, or belt is 0 to + / - 2%." During routine inspections, we often manually mark positions with a plumb line and measure distances with a tape measure, then calculate the speed deviation. This method is time-consuming and labor-intensive, and can result in significant errors.

[0003] The single-chip microcomputer has low cost, small size, strong ultrasonic directionality, slow energy consumption, and uses ultrasonic waves or lasers as media for inspection quickly and conveniently. The calculation is also relatively simple, and real-time control and non-contact measurement can be achieved. Therefore, this patent is based on improving inspection accuracy and improving calibration efficiency, and designs an escalator handrail and step speed deviation detector based on the AT89C51 single-chip microcomputer. Summary of the Invention

[0004] To overcome the above problems, the purpose of the present invention is to provide an escalator handrail and step speed deviation detector based on AT89C51 single chip microcomputer, which can be portable and clamped on the escalator and can improve the inspection accuracy.

[0005] The present invention is implemented by the following scheme: an escalator handrail and step speed deviation detector based on an AT89C51 single-chip microcomputer, the detector comprising: a base, a vertical pole, a flip arm, a rotating arm, an ultrasonic rangefinder, and a target block; the vertical pole is vertically arranged on the base and is rotatable, an end of the vertical pole is provided with a first notch, one end of the flip arm is hingedly arranged in the first notch of the vertical pole, and the flip arm can be flipped up and down on the vertical pole; one end of the rotating arm is rotatably arranged at the other end of the flip arm, the other end of the rotating arm is provided with a second notch, and the ultrasonic rangefinder is hingedly arranged in the second notch of the rotating arm; the target block is located on the escalator handrail; the ultrasonic rangefinder comprises an AT89C51 single-chip microcomputer, a reset module, a step speed setting module, an ultrasonic rangefinder module, and a display module; the reset module, the step speed setting module, the ultrasonic rangefinder module, and the display module are all connected to the AT89C51 single-chip microcomputer;

[0006] The base of the detector is set on the pedal surface, and the ultrasonic rangefinder of the tester is set on the escalator handrail and aimed at the target block; the speed value of the step or pedal is set through the step speed setting module, and the ultrasonic rangefinder module sends and receives ultrasonic signals to the target block. The AT89C51 microcontroller is used to analyze and calculate the speed deviation between the escalator handrail and the step, and displays it through the display module.

[0007] Furthermore, the AT89C51 single-chip microcomputer is used to analyze and calculate the speed deviation between the escalator handrail and the steps. The method is as follows: the ultrasonic generator of the ultrasonic ranging module sends out an ultrasonic signal at two moments with a set time interval T. When the ultrasonic wave encounters the target block to be measured, it is reflected back and received by the ultrasonic receiver of the ultrasonic ranging module.

[0008] The AT89C51 single-chip computer program is used to store the time T0 and T1 from the emission to the reception of the above two sets of ultrasonic waves. Since the transmission speed of ultrasonic waves in the air is known and the interval between the two sets of ultrasonic waves is T seconds, the speed difference ΔV between the handrail and the step is calculated as follows:

[0009] ΔV=(S1-S0) / (2*T)=C*(T1-T0) / (2*T)

[0010] Where: ΔV is the speed difference between the handrail and the steps;

[0011] S1 is the round trip distance of the sound wave at the next moment;

[0012] S1 is the round trip distance of the sound wave at the previous moment;

[0013] C is the transmission speed of ultrasound in air;

[0014] T1 is the time from the emission to the reception of the next set of ultrasonic waves;

[0015] T0 is the time from the previous set of ultrasonic waves being transmitted to being received;

[0016] The permissible deviation of the handrail's running speed relative to the actual speed of the steps or pedals is v', v' = ΔV / V*100%;

[0017] Where: ΔV is the speed difference between the handrail and the steps; V is the actual operating speed of the elevator.

[0018] Furthermore, the method for detecting the speed deviation between the escalator handrail and the steps is further specifically as follows: S1: stop the elevator and install the detector at a set position; clamp the base of the detector on the step surface, clamp or adsorb the target block on the handrail, adjust the vertical rod, flip the arm, and rotate the arm so that the transceiver port of the ultrasonic ranging module is parallel to the target surface;

[0019] S2: According to the escalator or sidewalk parameters, set the speed value of the steps or pedals through the step speed setting module;

[0020] S3: Start the elevator, wait until the speed returns to normal, and then turn on the detector. After a few seconds, the required data will be obtained - the allowable deviation of the handrail's running speed relative to the actual speed of the steps, pedals or belts.

[0021] S4: Move the base or adjust the vertical pole, flip the arm, rotate the arm, install the target block to the handrail on the other side, and measure another data using the same method;

[0022] The S5 and AT89C51 microcontrollers analyze the two sets of data to obtain the speed deviation of the escalator handrail and steps.

[0023] Furthermore, the ultrasonic rangefinder also includes a power supply module, which is respectively connected to the AT89C51 single-chip microcomputer, the reset module, the step speed setting module, the ultrasonic ranging module, and the display module. The power supply module provides power for the AT89C51 single-chip microcomputer, the reset module, the step speed setting module, the ultrasonic ranging module, and the display module.

[0024] The beneficial effects of the present invention are as follows: the present invention is provided with a detector, and the detector is provided with an ultrasonic rangefinder, and the ultrasonic rangefinder is composed of an AT89C51 single-chip microcomputer, which has low cost, small size, strong ultrasonic directivity, and slow energy consumption. The use of ultrasonic waves or lasers as a medium for inspection is relatively rapid and convenient, and the calculation is relatively simple, and real-time control and non-contact measurement can be achieved. In addition, the speed difference between the handrail and the step is detected by ultrasonic waves, thereby improving the inspection accuracy and the calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a schematic structural diagram of a detector arranged on an escalator handrail.

[0026] Figure 2 It is a front schematic diagram of the detector of the present invention being arranged on an escalator handrail.

[0027] Figure 3 It is a structural schematic diagram of the detector of the present invention.

[0028] Figure 4 It is a structural principle diagram of the ultrasonic range finder of the present invention.

[0029] Figure 5 It is a schematic diagram of the circuit structure of the ultrasonic range finder of the present invention. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] See also Figure 1 and Figure 2 As shown in FIG, an escalator handrail and step speed deviation detector based on AT89C51 single chip microcomputer comprises: a base 1, a vertical pole 2, a flip arm 3, a rotating arm 4, an ultrasonic range finder 5, and a target block 6; the vertical pole 2 is vertically arranged on the base 1 and can rotate. After the vertical pole 2 is rotated into place on the base, it can be relatively fixed. Figure 3 As shown, a first notch 21 is provided at the end of the vertical pole 2, one end of the flip arm 3 is hingedly provided in the first notch 21 of the vertical pole 2, and the flip arm 4 can be flipped up and down on the vertical pole 2; after being flipped up and down, it can be fastened at any position; one end of the rotating arm 4 is rotatably provided at the other end of the flip arm 3, and one end of the rotating arm 4 can be fastened after the other end of the flip arm is rotated into position; a second notch 41 is provided at the other end of the rotating arm 4, and the ultrasonic rangefinder is hingedly provided in the second notch of the rotating arm; the target block is located on the escalator handrail; such a detector can be used for escalators as well as moving walkways, and what is measured is the handrail and the steps or pedals or tapes. Figure 4 and Figure 5 As shown, the ultrasonic rangefinder 5 includes an AT89C51 single-chip microcomputer 51, a power module 52, a reset module 53, a step speed setting module 54, an ultrasonic ranging module 55, and a display module 56; the reset module, the step speed setting module, the ultrasonic ranging module, and the display module are all connected to the AT89C51 single-chip microcomputer; wherein, the flip arm 3 can swing up and down on the first notch 21 of the vertical pole 2, so that the transceiver port of the ultrasonic ranging module of the ultrasonic rangefinder is parallel to the target surface; the ultrasonic rangefinder 5 is also hingedly arranged in the second notch of the rotating arm, so that the ultrasonic rangefinder can swing up and down more flexibly, so that the transceiver port of the ultrasonic ranging module is parallel to the target surface.

[0032] The power module is connected to the AT89C51 single-chip microcontroller, reset module, step speed setting module, ultrasonic ranging module, and display module, providing power to these modules. The reset module consists of a reset switch, an electrolytic capacitor, and a resistor, while the step speed setting module comprises multiple reset switches. The display module comprises an LCD display and an RP1 resistor array. The ultrasonic ranging module is model SRF04. The AT89C51 single-chip microcontroller serves as the main controller, while the LM016L LCD module is used for display. The single-chip microcontroller controls the generation and reception of ultrasonic drive signals. The display module can display data such as step speed, speed difference, and speed difference percentage.

[0033] The base of the detector is set on the pedal surface, and the ultrasonic rangefinder of the tester is set on the escalator handrail and aimed at the target block; the speed value of the step or pedal is set through the step speed setting module, and the ultrasonic rangefinder module sends and receives ultrasonic signals to the target block. The AT89C51 microcontroller is used to analyze and calculate the speed deviation between the escalator handrail and the step, and displays it through the display module.

[0034] In the present invention, the AT89C51 single-chip microcomputer is used to analyze and calculate the speed deviation between the escalator handrail and the steps. The method is as follows: the ultrasonic generator of the ultrasonic ranging module sends an ultrasonic signal at two moments with a set time interval T. When the ultrasonic wave encounters the target block to be measured and is reflected back, it is received by the ultrasonic receiver of the ultrasonic ranging module.

[0035] The AT89C51 single-chip computer program is used to store the time T0 and T1 from the emission to the reception of the above two sets of ultrasonic waves. Since the transmission speed of ultrasonic waves in the air is known and the interval between the two sets of ultrasonic waves is T seconds, the speed difference ΔV between the handrail and the step is calculated as follows:

[0036] ΔV=(S1-S0) / (2*T)=C*(T1-T0) / (2*T), if T is 3.4 seconds,

[0037] Where: ΔV is the speed difference between the handrail and the steps;

[0038] S1 is the round trip distance of the sound wave at the next moment;

[0039] S1 is the round trip distance of the sound wave at the previous moment;

[0040] C is the transmission speed of ultrasound in air;

[0041] T1 is the time from the emission to the reception of the next set of ultrasonic waves;

[0042] T0 is the time from the previous set of ultrasonic waves being transmitted to being received;

[0043] The permissible deviation of the handrail's running speed relative to the actual speed of the steps or pedals is v', v' = ΔV / V*100%;

[0044] Where: ΔV is the speed difference between the handrail and the steps; V is the actual operating speed of the elevator (which can be obtained from the parameters on the escalator or sidewalk nameplate, or by fixing this measuring instrument outside the elevator and placing a target block on the steps or pedals for measurement).

[0045] The method for detecting the speed deviation between the escalator handrail and the steps is further specifically as follows: S1: stop the elevator and install the detector at a set position; clamp the base of the detector on the step surface, clamp or adsorb the target block on the handrail, adjust the vertical rod, flip the arm, and rotate the arm so that the transceiver port of the ultrasonic ranging module is parallel to the target surface;

[0046] S2: According to the escalator or sidewalk parameters, set the speed value of the steps or pedals through the step speed setting module;

[0047] S3: Start the elevator, wait until the speed returns to normal, and then turn on the detector. After a few seconds, the required data will be obtained - the allowable deviation of the handrail's running speed relative to the actual speed of the steps, pedals or belts.

[0048] S4: Move the base or adjust the vertical pole, flip the arm, rotate the arm, install the target block to the handrail on the other side, and measure another data using the same method;

[0049] The S5 and AT89C51 microcontrollers analyze the two sets of data to obtain the speed deviation of the escalator handrail and steps.

[0050] The present invention is provided with a detector, and the detector is provided with an ultrasonic rangefinder. The ultrasonic rangefinder is composed of an AT89C51 single-chip microcomputer. The single-chip microcomputer has low cost and compact size, strong ultrasonic directivity, and slow energy consumption. The detection using ultrasonic waves or lasers as a medium is relatively rapid and convenient, and the calculation is relatively simple. Real-time control and non-contact measurement can be achieved. In addition, the speed difference between the handrail and the step is detected by ultrasonic waves, thereby improving the detection accuracy and the calibration efficiency.

[0051] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. An escalator handrail and step speed deviation detector based on AT89C51 single-chip microcomputer, characterized by: The detector includes: a base, a vertical pole, a flip arm, a rotating arm, an ultrasonic rangefinder, and a target block; the vertical pole is vertically arranged on the base and is rotatable, the end of the vertical pole is provided with a first notch, one end of the flip arm is hingedly arranged in the first notch of the vertical pole, and the flip arm can be flipped up and down on the vertical pole; one end of the rotating arm is rotatably arranged on the other end of the flip arm, the other end of the rotating arm is provided with a second notch, and the ultrasonic rangefinder is hingedly arranged in the second notch of the rotating arm; the target block is located on the escalator handrail; the ultrasonic rangefinder includes an AT89C51 single-chip microcomputer, a reset module, a step speed setting module, an ultrasonic rangefinder module, and a display module; the reset module, the step speed setting module, the ultrasonic rangefinder module, and the display module are all connected to the AT89C51 single-chip microcomputer; The base of the tester is placed on the pedal surface, and the ultrasonic rangefinder of the tester is placed on the escalator handrail and aimed at the target block. The speed value of the step or pedal is set through the step speed setting module, and the ultrasonic rangefinder module sends and receives ultrasonic signals to the target block. The AT89C51 single-chip microcomputer is used to analyze and calculate the speed deviation between the escalator handrail and the step, and displays it through the display module. The method of analyzing and calculating the speed deviation between the escalator handrail and the steps using the AT89C51 single-chip microcomputer is as follows: the ultrasonic generator of the ultrasonic ranging module sends an ultrasonic signal at two moments with a set time interval T. When the ultrasonic wave encounters the target block to be measured, it is reflected back and received by the ultrasonic receiver of the ultrasonic ranging module. The AT89C51 single-chip computer program is used to store the time T0 and T1 from the emission to the reception of the above two sets of ultrasonic waves. Since the transmission speed of ultrasonic waves in the air is known and the interval between the two sets of ultrasonic waves is T seconds, the speed difference ΔV between the handrail and the step is calculated as follows: ΔV=(S1-S0) / (2*T)=C*(T1-T0) / (2*T) Where: ΔV is the speed difference between the handrail and the steps; S1 is the round trip distance of the sound wave at the next moment; S0 is the round trip distance of the sound wave at the previous moment; C is the transmission speed of ultrasound in air; T1 is the time from the emission to the reception of the next set of ultrasonic waves; T0 is the time from the previous set of ultrasonic waves being transmitted to being received; The allowable deviation v' of the handrail's running speed relative to the actual speed of the steps or pedals is v'=ΔV / V*100%, where ΔV is the speed difference between the handrail and the steps, and V is the actual running speed of the escalator.

2. The escalator handrail and step speed deviation detector based on the AT89C51 single-chip microcomputer according to claim 1 is characterized in that: The method for detecting the speed deviation between the escalator handrail and the steps is further specifically as follows: S1: stop the escalator and install the detector at a set position; clamp the base of the detector on the step surface, clamp or adsorb the target block on the handrail, adjust the vertical rod, flip the arm, and rotate the arm so that the transceiver port of the ultrasonic ranging module is parallel to the target surface; S2: According to the escalator or sidewalk parameters, set the speed value of the steps or pedals through the step speed setting module; S3: Start the escalator and turn on the detector after the speed returns to normal. After a few seconds, the required data will be obtained - the allowable deviation of the handrail's running speed relative to the actual speed of the steps, pedals or belt; S4: Move the base or adjust the vertical pole, flip the arm, rotate the arm, install the target block to the handrail on the other side, and measure another data using the same method; The S5 and AT89C51 microcontrollers analyze the two sets of data to obtain the speed deviation of the escalator handrail and steps.

3. The escalator handrail and step speed deviation detector based on the AT89C51 single-chip microcomputer according to claim 1 is characterized in that: The ultrasonic rangefinder also includes a power supply module, which is connected to the AT89C51 single-chip microcomputer, the reset module, the step speed setting module, the ultrasonic ranging module, and the display module respectively. The power supply module provides power for the AT89C51 single-chip microcomputer, the reset module, the step speed setting module, the ultrasonic ranging module, and the display module.

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