CN108100843B - High-precision step loss detection method and device based on ultrasonic sensor - Google Patents
High-precision step loss detection method and device based on ultrasonic sensor Download PDFInfo
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- CN108100843B CN108100843B CN201711185173.5A CN201711185173A CN108100843B CN 108100843 B CN108100843 B CN 108100843B CN 201711185173 A CN201711185173 A CN 201711185173A CN 108100843 B CN108100843 B CN 108100843B
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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
- B66B29/005—Applications of security monitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B27/00—Indicating operating conditions of escalators or moving walkways
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- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
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Abstract
The invention discloses a high-precision step loss detection method and device based on an ultrasonic sensor, and relates to the field of ultrasonic detection of step loss; the method comprises the following steps: 1) sending and receiving the transmitted waves to each step through an ultrasonic sensor to obtain the shaft distance of each step; 2) obtaining a plurality of interaxial distance data after a period of detection time, and calculating a reference time difference corresponding to the shortest interaxial distance after selecting the shortest interaxial distance; 3) calculating the time difference corresponding to the shaft distance of each step obtained in the step 1; 4) judging whether the time difference obtained in the step 3 is larger than a reference time difference or not, and if so, determining that the steps are lost; if not, jumping to the step 2; the invention solves the problem of poor practicability caused by adopting ultrasonic infrared diffuse reflection to sense the fixed distance in the conventional detection method, and achieves the effect of accurately detecting the step loss by detecting the corresponding shortest distance of different escalators.
Description
Technical Field
The invention relates to the field of ultrasonic detection of step loss, in particular to a high-precision step loss detection method and device based on an ultrasonic sensor.
Background
When the escalator is in the operation process, due to the use of man-made or long-term steps, a certain step drops instantly, and the dangerous condition of an elevator cavity appears, equipment is needed to be used for timely detecting the cavity with the missing step so as to avoid the occurrence of safety accidents, the step loss of the escalator has a great influence on the operation safety of the escalator, and according to the regulation, the step loss monitoring devices of field equipment are arranged beside the sinking protection part devices of the upper and lower steps, and the inspection method comprises the following steps: and (3) removing 1 step or pedal, moving the notch to a straight line section position connected with the lower part of the rotary section in the return branch, and normally starting the equipment to ascend and descend. However, the currently existing monitoring devices such as the photoelectric proximity switch are arranged in the horizontal section of the working branch, so that the monitoring devices can only monitor the step loss of the horizontal section of the working branch, have poor interference resistance and cannot meet the inspection requirement; on the other hand, infrared diffuse reflection is mostly utilized in the existing ultrasonic wave application field, and the adopted standard distance and escalator length requirement detection device is matched with the escalator, so that the practicability is poor, the flexibility is low, and the current situation of the escalator cannot be met; meanwhile, the escalator has a rule in operation: one step corresponds to one step shaft, the step shaft has the shortest distance to the surface of the escalator in the process of running and overturning in the escalator, and the time difference corresponding to the shortest distance is the time when the step is not lost, namely normally runs, so that the step loss detection device is required to accurately judge whether the step is lost or not according to the detected shortest distance.
Disclosure of Invention
The invention aims to: the invention provides a high-precision step loss detection method and device based on an ultrasonic sensor, and solves the problem of poor practicability caused by the fact that an existing detection method adopts ultrasonic infrared diffuse reflection to sense a fixed distance.
The technical scheme adopted by the invention is as follows:
a high-precision step loss detection method based on an ultrasonic sensor comprises the following steps:
step 1: sending and receiving the transmitted waves to each step through an ultrasonic sensor to obtain the shaft distance of each step;
step 2: obtaining a plurality of interaxial distance data after a period of detection time, and calculating a reference time difference corresponding to the shortest interaxial distance after selecting the shortest interaxial distance;
and step 3: calculating the time difference corresponding to the shaft distance of each step obtained in the step 1;
and 4, step 4: judging whether the time difference obtained in the step 3 is larger than a reference time difference or not, and if so, determining that the steps are lost; if not, jumping to the step 2.
Preferably, the step 2 comprises the steps of:
step 2.1: setting proper detection time according to the steps of the escalator, and continuously detecting the shaft distance of each step in the detection time to obtain a plurality of shaft distance data;
step 2.2: selecting a shortest inter-axis distance from the plurality of inter-axis distance data;
step 2.3: and calculating the time difference between the two step shafts according to the shortest shaft distance to serve as the reference time difference when the steps normally run.
Preferably, the detection time of step 2.1 is 5-10 minutes.
High-precision step loss detection device based on ultrasonic sensor, comprising
An ultrasonic sensor for transmitting and receiving a radio wave;
an ultrasonic measurement circuit for measuring and processing ultrasonic waveform signals;
the ultrasonic transmission conversion circuit is used for converting the ultrasonic waveform signal into a serial port signal, performing anti-interference and isolation processing on the serial port signal after the analog-to-digital conversion of the serial port signal and transmitting the serial port signal to the single chip microcomputer;
and the singlechip is used for calculating distance and time after receiving the signals and judging the time difference to finish the step loss detection.
Preferably, the ultrasonic measurement circuit comprises a probe, a filter circuit and a signal processing chip; the probe, the filter circuit and the signal processing chip are electrically connected in sequence.
Preferably, the ultrasonic transmission conversion circuit comprises a waveform-serial port conversion chip, an analog-to-digital conversion unit and a signal isolation chip, and the waveform-serial port conversion chip, the analog-to-digital conversion unit and the signal isolation chip are electrically connected in sequence.
Preferably, the single chip microcomputer adopts STM32 series.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the method and the device have the advantages that the shortest distances of different escalators are obtained through calculation according to the distance measurement of the different escalators by using ultrasonic waves, and the time difference that the steps are not lost is obtained through the shortest distances and is used as a reference so as to judge whether the steps are lost or not;
2. the ultrasonic signals are subjected to anti-interference processing and then converted and connected with the single chip microcomputer, so that the interference of the external environment on the measurement is avoided, and the measurement precision is improved;
3. the invention realizes that ultrasonic signals are processed and sent to the singlechip to carry out distance calculation and time difference judgment on whether the steps are lost or not by connecting the ultrasonic sensor, the ultrasonic measuring circuit, the ultrasonic transmission and conversion circuit and the singlechip, avoids the defects of poor practicability and poor anti-interference performance of the traditional diffuse reflection or proximity switch, does not need to consider whether the escalator and the detection device are matched or not, further improves the practicability and effectiveness of the escalator step loss detection method, has strong anti-interference performance and promotes the improvement of the detection precision.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a flow chart of step 2 of the present invention;
FIG. 3 is a system block diagram of the apparatus of the present invention;
FIG. 4 is a schematic diagram of a single-chip microcomputer of the apparatus of the present invention
FIG. 5 is a circuit diagram of an ultrasonic measurement of the apparatus of the present invention;
fig. 6 is a circuit diagram of an ultrasonic transmission switching circuit of the apparatus of the present invention.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
The present invention is described in detail below with reference to fig. 1-6.
Example 1
A high-precision step loss detection method based on an ultrasonic sensor comprises the following steps:
step 1: sending and receiving the transmitted waves to each step through an ultrasonic sensor to obtain the shaft distance of each step;
step 2: obtaining a plurality of interaxial distance data after a period of detection time, and calculating a reference time difference corresponding to the shortest interaxial distance after selecting the shortest interaxial distance;
and step 3: calculating the time difference corresponding to the shaft distance of each step obtained in the step 1;
and 4, step 4: judging whether the time difference obtained in the step 3 is larger than a reference time difference or not, and if so, determining that the steps are lost; if not, jumping to the step 2.
The step 2 comprises the following steps:
step 2.1: setting proper detection time according to the steps of the escalator, and continuously detecting the shaft distance of each step in the detection time to obtain a plurality of shaft distance data;
step 2.2: selecting a shortest inter-axis distance from the plurality of inter-axis distance data;
step 2.3: and calculating the time difference between the two step shafts according to the shortest shaft distance to serve as the reference time difference when the steps normally run.
The detection time of step 2.1 is 5-10 minutes.
High-precision step loss detection device based on ultrasonic sensor, comprising
An ultrasonic sensor for transmitting and receiving a radio wave;
an ultrasonic measurement circuit for measuring and processing ultrasonic waveform signals;
the ultrasonic transmission conversion circuit is used for converting the ultrasonic waveform signal into a serial port signal, performing anti-interference and isolation processing on the serial port signal after the analog-to-digital conversion of the serial port signal and transmitting the serial port signal to the single chip microcomputer;
and the singlechip is used for calculating distance and time after receiving the signals and judging the time difference to finish the step loss detection.
The ultrasonic measuring circuit comprises a probe, a filter circuit and a signal processing chip; the probe, the filter circuit and the signal processing chip are electrically connected in sequence.
The ultrasonic transmission conversion circuit comprises a waveform-serial port conversion chip, an analog-digital conversion unit and a signal isolation chip, wherein the waveform-serial port conversion chip, the analog-digital conversion unit and the signal isolation chip are electrically connected in sequence.
The single chip microcomputer adopts STM32 series.
Example 2
A high-precision step loss detection method and device based on an ultrasonic sensor comprises the following steps: the method comprises the steps that firstly, a radio wave is sent and received through an ultrasonic sensor, an ultrasonic measurement circuit carries out waveform signal measurement and processing, then the processed waveform signal is converted through a waveform-serial port conversion chip, an analog-digital conversion unit and a signal isolation chip and then is transmitted to a single chip microcomputer, the single chip microcomputer carries out calculation to obtain the step shaft distance, after 5-10 minutes of detection time, the single chip microcomputer calculates the shortest step shaft distance in the detection time period and then calculates the reference time difference between the corresponding step shafts, and the reference time difference is 1.5s according to the calculation; because each step corresponds to one step shaft, if the step is lost, the time difference corresponding to the step shaft distance is larger than the reference time difference, after the reference time difference corresponding to the shortest shaft distance of the step is obtained, the time difference corresponding to the step shaft distance in the detection time is compared with the reference time difference, so that the step loss detection can be realized, and the defect that the existing detection device needs an escalator and a detection device to be matched when sensing by using a fixed distance can be avoided; a high-precision step loss detection device based on an ultrasonic sensor comprises the ultrasonic sensor, an ultrasonic measurement circuit, an ultrasonic transmission conversion circuit and a single chip microcomputer; the ultrasonic sensor is used for transmitting and receiving radio waves; an ultrasonic measurement circuit for measuring and processing ultrasonic waveform signals; the ultrasonic transmission conversion circuit is used for converting the ultrasonic waveform signal into a serial port signal, performing anti-interference and isolation processing on the serial port signal after the analog-to-digital conversion of the serial port signal and transmitting the serial port signal to the single chip microcomputer; and the singlechip is used for calculating distance and time after receiving the signals and judging the time difference to finish the step loss detection. The method is suitable for all escalators, the shortest shaft distance is detected aiming at different escalators, so that the step loss is judged, and the detection method is good in universality and high in precision.
The ultrasonic measuring circuit comprises a probe, a filter circuit and a signal processing chip; the probe, the filter circuit and the signal processing chip are electrically connected in sequence. The ultrasonic transmission conversion circuit comprises a waveform-serial port conversion chip, an analog-digital conversion unit and a signal isolation chip, wherein the waveform-serial port conversion chip, the analog-digital conversion unit and the signal isolation chip are electrically connected in sequence. The singlechip adopts STM32 series, and the ultrasonic measurement circuit connection is as follows: two ends of a probe LS1 are respectively connected with signal processing chip pins TDO and TCK, one end of the probe LS1 is connected with a power supply through a resistor R86, the other end of the probe LS 85 is connected to the ground through a capacitor C88 to the rear circuit of the power supply, two ends of the probe LS2 are respectively connected with signal processing chip pins MSEL1 and nCEO, one end of a probe LS2 is sequentially connected with a capacitor C81, a resistor R84 and a capacitor C78 and then grounded, and is further connected with a capacitor C82 and a resistor R87 and then connected with a capacitor C78, and pins nCONFIG and CLKL _ FB1p of the signal processing chip are respectively connected with an ultrasonic signal transmission conversion circuit. The ultrasonic transmission conversion circuit is connected as follows: pin 1, pin 2 and pin 3 of the waveform-serial port conversion chip are all connected to VDD, pin 4, pin 5 and pin 6 are grounded, pin 7 is connected with pin 8 of the signal isolation chip and is also connected with resistor R42 to VDD, pin 9 is connected with pin 7 of the signal isolation chip and is also connected with resistor R43 to pin 8 of the signal isolation chip, pin 10 of the waveform-serial port conversion chip is connected with pin 6 of the signal isolation chip, pin 8 of the waveform-serial port conversion chip is connected with pin 5 of the signal isolation chip and is also connected with pin 6 of the signal isolation chip through resistor R44; pin 4 of the signal isolation chip is grounded, pin 1 is connected with VDD, and pin 3 and pin 2 are respectively connected with TX and RX of the single chip microcomputer. The method and the device have the advantages that the shortest distances of different escalators are obtained through calculation according to the distance measurement of the different escalators by using ultrasonic waves, the time difference that the steps are not lost is obtained through the shortest distances and is used as a reference to judge whether the steps are lost or not, the method and the device are suitable for all the escalators, the precision is high, the anti-interference capability is high, the problem that the practicability is poor due to the fact that the fixed distance is induced by adopting ultrasonic infrared diffuse reflection in the conventional detection method is solved, and the effect of accurately detecting the steps by detecting the shortest.
Claims (3)
1. A high-precision step loss detection method based on an ultrasonic sensor is characterized by comprising the following steps:
an ultrasonic sensor for transmitting and receiving a radio wave;
an ultrasonic measurement circuit for measuring and processing ultrasonic waveform signals;
the ultrasonic transmission conversion circuit is used for converting the ultrasonic waveform signal into a serial port signal, performing anti-interference and isolation processing on the serial port signal after the analog-to-digital conversion of the serial port signal and transmitting the serial port signal to the single chip microcomputer;
the single chip microcomputer is used for calculating distance and time after receiving the signals and judging the time difference to finish the step loss detection;
the ultrasonic measuring circuit comprises a probe, a filter circuit and a signal processing chip; the probe, the filter circuit and the signal processing chip are electrically connected in sequence;
the ultrasonic transmission conversion circuit comprises a waveform-serial port conversion chip, an analog-digital conversion unit and a signal isolation chip, wherein the waveform-serial port conversion chip, the analog-digital conversion unit and the signal isolation chip are electrically connected in sequence;
the detection method comprises the following steps:
step 1: sending and receiving the transmitted waves to each step through an ultrasonic sensor to obtain the shaft distance of each step;
step 2: obtaining a plurality of interaxial distance data after a period of detection time, and calculating a reference time difference corresponding to the shortest interaxial distance after selecting the shortest interaxial distance;
and step 3: calculating the time difference corresponding to the shaft distance of each step obtained in the step 1;
and 4, step 4: judging whether the time difference obtained in the step 3 is larger than a reference time difference or not, and if so, determining that the steps are lost; if not, jumping to the step 2;
the step 2 comprises the following steps:
step 2.1: setting proper detection time according to the steps of the escalator, and continuously detecting the shaft distance of each step in the detection time to obtain a plurality of shaft distance data;
step 2.2: selecting a shortest inter-axis distance from the plurality of inter-axis distance data;
step 2.3: and calculating the time difference between the two step shafts according to the shortest shaft distance to serve as the reference time difference when the steps normally run.
2. The ultrasonic sensor-based high-precision step loss detection method according to claim 1, wherein: the detection time of the step 2.1 is 5-10 minutes.
3. The ultrasonic sensor-based high-precision step loss detection method according to claim 1, wherein: the single chip microcomputer adopts STM32 series.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998055387A1 (en) * | 1997-06-05 | 1998-12-10 | O & K Rolltreppen Gmbh & Co. Kg | Safety device for systems for conveying persons |
| CN203284033U (en) * | 2013-05-29 | 2013-11-13 | 江南嘉捷电梯股份有限公司 | Pedal losing device for moving walk |
| CN105366522A (en) * | 2014-08-22 | 2016-03-02 | 上海三菱电梯有限公司 | Safety detection device of passenger conveying device |
| CN205210249U (en) * | 2015-12-17 | 2016-05-04 | 朱琦 | Partial discharge detector system based on ultrasonic sensor |
| CN207379982U (en) * | 2017-11-23 | 2018-05-18 | 中景恒基云端物联网科技成都有限公司 | A kind of high-precision step loss detection device based on ultrasonic sensor |
-
2017
- 2017-11-23 CN CN201711185173.5A patent/CN108100843B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998055387A1 (en) * | 1997-06-05 | 1998-12-10 | O & K Rolltreppen Gmbh & Co. Kg | Safety device for systems for conveying persons |
| CN203284033U (en) * | 2013-05-29 | 2013-11-13 | 江南嘉捷电梯股份有限公司 | Pedal losing device for moving walk |
| CN105366522A (en) * | 2014-08-22 | 2016-03-02 | 上海三菱电梯有限公司 | Safety detection device of passenger conveying device |
| CN205210249U (en) * | 2015-12-17 | 2016-05-04 | 朱琦 | Partial discharge detector system based on ultrasonic sensor |
| CN207379982U (en) * | 2017-11-23 | 2018-05-18 | 中景恒基云端物联网科技成都有限公司 | A kind of high-precision step loss detection device based on ultrasonic sensor |
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