CN117516676A - Safety detection device, parking system, and safety detection method - Google Patents
Safety detection device, parking system, and safety detection method Download PDFInfo
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- CN117516676A CN117516676A CN202311282417.7A CN202311282417A CN117516676A CN 117516676 A CN117516676 A CN 117516676A CN 202311282417 A CN202311282417 A CN 202311282417A CN 117516676 A CN117516676 A CN 117516676A
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- 238000001514 detection method Methods 0.000 title claims abstract description 113
- 238000005070 sampling Methods 0.000 claims abstract description 160
- 238000012545 processing Methods 0.000 claims abstract description 59
- 238000012937 correction Methods 0.000 claims description 33
- 230000000630 rising effect Effects 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 19
- 238000005259 measurement Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000001174 ascending effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000011897 real-time detection Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000819 phase cycle Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H6/00—Buildings for parking cars, rolling-stock, aircraft, vessels or like vehicles, e.g. garages
- E04H6/42—Devices or arrangements peculiar to garages, not covered elsewhere, e.g. securing devices, safety devices, monitoring and operating schemes; centering devices
- E04H6/422—Automatically operated car-parks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/021—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles having electrical weight-sensitive devices
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
Abstract
The invention discloses a safety detection device, a parking system and a safety detection method for parking equipment. The safety detection device includes: the sampling module is used for sampling voltage waveforms and current waveforms of the motor of the parking equipment so as to obtain sampling voltage and sampling current; the processing module calculates the object weight which can be lifted by the output torque of the motor according to the sampling voltage and the sampling current, wherein when the vehicle carrying plate of the parking equipment is empty, the sampling module obtains a first group of sampling voltage and sampling current, and the processing module obtains the empty weight of the parking equipment; when a vehicle is loaded on a vehicle carrying plate of the parking equipment, the sampling module obtains a second group of sampling voltage and sampling current, and the processing module obtains the total load weight of the parking equipment; the processing module obtains the net weight of the parked vehicle on the vehicle carrying plate of the parking equipment according to the difference between the total load weight and the no-load weight. The safety detection device can detect whether the weight of the vehicle exceeds the rated load capacity of the parking equipment, and has the advantages of high real-time performance, high detection speed, accurate detection result and the like.
Description
Technical Field
The present invention relates to the field of security detection of parking equipment, and more particularly, to a security detection apparatus, a parking system, and a security detection method for a parking equipment.
Background
With the development of society, the automobile has a high growth speed, but the land resources are relatively scarce, and the problem of difficult parking is increasingly serious, so that the requirement of people on space utilization rate is improved, and the development of mechanical parking equipment (Mechanical equipment for parking automobile) is promoted.
The mechanical parking equipment refers to a mechanical or mechanical equipment system for storing and taking out a parked vehicle, is a complete set of mechanical and electrical integration equipment, has the advantages of small occupied area, high parking rate, flexible installation and configuration, convenience in management and the like, and is widely applied to scenes such as parking lots, parking garages and the like at present.
However, most of the existing mechanical parking devices cannot detect the load of the parked vehicle, and when the load of the parked vehicle exceeds the limit allowed to be carried by the parking device, the device may malfunction, and the vehicle falls aloft to be damaged, and the accident occurs.
Accordingly, improvements to existing mechanical parking systems are desired to address the above-described issues.
Disclosure of Invention
In order to solve the problems of the prior art, the invention provides a safety detection device, a parking system and a safety detection method for detecting the net load weight of parking equipment in real time.
According to a first aspect of an embodiment of the present invention, there is provided a security detection device including:
the sampling module is used for sampling voltage waveforms and current waveforms of the motor of the parking equipment so as to obtain sampling voltage and sampling current; and
a processing module for calculating the object weight which can be lifted by the output torque of the motor according to the sampling voltage and the sampling current,
when the parking equipment is empty, the sampling module obtains a first group of sampling voltage and sampling current, and the processing module obtains the empty weight of the parking equipment;
when the parking equipment is loaded with a vehicle, the sampling module obtains a second group of sampling voltage and sampling current, and the processing module obtains the total load weight of the parking equipment;
the processing module judges whether the weight of the vehicle exceeds the rated load capacity of the parking equipment according to the total load weight and the idle load weight.
Optionally, the method further comprises: the parking space identification module is used for identifying the working parking space when the number of the parking spaces of the parking equipment is a plurality of,
the parking equipment comprises a parking equipment, a sampling module, a parking space sampling module, a power supply module and a power supply module, wherein the motors of the parking equipment are connected to a total power supply loop, and the sampling module samples voltage waveforms and current waveforms of the motors of the parking space which are working through the total power supply loop.
Optionally, the processing module pre-stores rated working parameters including rated voltage, rated current, rated rotation speed, rated frequency, pole pair number of the motor and rated lifting speed of the parking equipment,
and the processing module calculates the object weight which can be lifted by the motor output torque according to the rated working parameter, the sampling voltage and the sampling current.
Optionally, the processing module sets a first correction coefficient and/or a second correction coefficient to correct the rated working parameter.
Optionally, the processing module calculates an object weight that can be lifted by the motor output torque according to the rated operating parameter, the sampling voltage and the sampling current based on a weight detection model to obtain the net load weight of the parking device, where the weight detection model is:
wherein m is c For the net load weight, N is the number of times the processing module calculates the total load weight, m (k) is the total load weight at time k，m 0 For the empty weight, u j (k) I is the sampling voltage at time k j (k) For the sampling current at time k, q 1 For the first correction factor, q 2 For the second correction coefficient, U N For the rated voltage, I N For the rated current, n N For the rated rotation speed f N For the nominal frequency, p is the pole pair number of the motor, V N And the rated lifting speed is set.
Optionally, when the parking apparatus is loaded with a first weight of the vehicle or a first standard weight, the processing module calculates a first payload weight of the parking apparatus,
when the parking apparatus is loaded with a second weight of the vehicle or a second standard weight, the processing module calculates a second payload weight of the parking apparatus,
the processing module obtains the first correction factor and the second correction factor based at least on the first payload weight, the first weight, or the weight of the first standard weight, the second payload weight, the second weight, or the weight of the second standard weight.
Optionally, the processing module includes:
the state detection unit is used for judging the working state of the parking equipment according to the sampling voltage and the sampling current;
the weight detection unit is used for calculating the empty load weight and the total load weight of the parking equipment according to the sampling voltage and the sampling current when the state detection unit judges that the vehicle carrying plate of the parking equipment stably rises, and calculating the net load weight according to the empty load weight and the total load weight; and
and the overload judging unit is used for judging whether the parking equipment is overloaded or not and calculating the overload of the parking equipment according to the payload weight and the rated load capacity of the parking equipment.
Optionally, the method further comprises:
the alarm module is used for displaying alarm information when the overload judging unit judges that the parking equipment is overloaded and the overload reaches a first threshold value; and/or
And the control module is used for providing a limited rising signal to cut off a rising loop of the overweight equipment when the overload judging unit judges that the parking equipment is overloaded and the overweight reaches a second threshold value.
According to a second aspect of an embodiment of the present invention, there is provided a parking system including:
a parking apparatus; and
the safety detection device is used for detecting whether the parking equipment is overloaded or not.
According to a third aspect of an embodiment of the present invention, there is provided a security detection method, including:
sampling voltage waveforms and current waveforms of a motor of a parking device to obtain sampling voltages and sampling currents, wherein a first set of sampling voltages and sampling currents are obtained when the parking device is empty, and a second set of sampling voltages and sampling currents are obtained when the parking device is loaded with a vehicle;
calculating the weight of an object with the lifting output torque of the motor according to the sampling voltage and the sampling current, wherein the empty load weight of the parking equipment is obtained according to a first group of the sampling voltage and the sampling current, and the total load weight of the parking equipment is obtained according to a second group of the sampling voltage and the sampling current; and
and judging whether the weight of the vehicle exceeds the rated load capacity of the parking equipment according to the total load weight and the idle load weight.
Optionally, the method further comprises: when the number of the parking spaces of the parking equipment is a plurality of, identifying the working parking spaces,
the parking equipment comprises a parking equipment, a plurality of motors, a total power supply loop, a voltage waveform sampling device and a current waveform sampling device, wherein the motors of the parking equipment are connected to the total power supply loop, and the voltage waveform sampling and the current waveform sampling device are used for sampling the voltage waveform and the current waveform of the motors of the parking space which are working through the total power supply loop.
Optionally, calculating the object weight that the output torque of the motor can be raised according to the sampling voltage and the sampling current comprises:
calculating the net load weight according to rated working parameters, the sampling voltage and the sampling current based on a weight detection model, wherein the rated voltage, the rated current, the rated rotating speed, the rated frequency and the pole pair number of the motor and the rated lifting speed of the parking equipment;
setting a first correction coefficient and/or a second correction coefficient to correct the rated working parameter;
the weight detection model is as follows:
wherein m is c For the net load weight, N is the number of times the processing module calculates the total load weight, m (k) is the total load weight at time k, m 0 For the empty weight, u j (k) I is the sampling voltage at time k j (k) For the sampling current at time k, q 1 For the first correction factor, q 2 For the second correction coefficient, U N For the rated voltage, I N For the rated current, n N For the rated rotation speed f N For the nominal frequency, p is the pole pair number of the motor, V N And the rated lifting speed is set.
According to the safety detection device, the parking system and the safety detection method, whether the vehicle exceeds the rated load capacity of the parking equipment or not can be detected in real time only by utilizing the voltage waveform and the current waveform of the motor and the rated working parameters of the equipment, the real-time detection, the alarm and the limitation of the parking device can be realized, the operation safety of the parking equipment is ensured, and the vehicle damage and the safety accident caused by overload can be effectively prevented.
According to the safety detection device, the parking system and the safety detection method, a weight sensor is not required to be installed on parking equipment, a frequency converter is not required to be relied on to output signals, the real-time performance and the accuracy of detection are greatly improved, and the compatibility of the safety detection device is improved.
The weight measurement model provided by the embodiment of the application considers the influence of factors such as motor voltage fluctuation, inaccurate rated parameters and the like on weight measurement, ensures the accuracy of weight measurement, has the advantages of simple structure, convenient installation and wiring, no maintenance, low cost and the like, and has good application and popularization values.
The safety detection device, the parking system and the safety detection method can be applied to the parking system comprising a plurality of parking spaces, and the plurality of parking spaces can share one safety detection device, so that hardware cost and management cost are saved.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.
FIG. 1 shows a schematic view of a parking system according to an embodiment of the present application;
fig. 2 shows a schematic view of a safety detection device according to a first embodiment of the present application;
fig. 3 shows a schematic view of a security detection device according to a second embodiment of the present application;
fig. 4 shows a flow chart of a security detection method according to an embodiment of the present application.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. Like elements are denoted by like reference numerals throughout the various figures. For clarity, the various features of the drawings are not drawn to scale. Furthermore, some well-known portions may not be shown in the drawings.
Numerous specific details of the invention, such as device structures, materials, dimensions, processing techniques and technologies, are set forth in the following description in order to provide a thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
It should be understood that a and B in the embodiments of the present application are connected/coupled, which means that a and B may be connected in series or parallel, or that a and B pass through other devices, which embodiments of the present application do not limit.
The following describes a safety detection device, a parking system, and a safety detection method according to embodiments of the present application in detail with reference to the accompanying drawings.
Fig. 1 shows a schematic view of a parking system according to an embodiment of the present application.
As shown in fig. 1, the parking system 100 includes a parking apparatus and a safety detection device 120.
The parking device comprises a motor 111, a lifting device 112 and a vehicle carrying plate 113, wherein the motor 111 can provide output torque as power for lifting the vehicle carrying plate 113 by the lifting device 112. In fig. 1, a lifting and traversing type parking device (PSH) is exemplified as a parking device, and it is understood that the parking device may be any one of a vertical circulation type parking device (PCX), a roadway stacking type parking device (PXD), a horizontal circulation type parking device (PSX), a multi-layer circulation type Parking Device (PDX), a plane movement type parking device (PPY), a vehicle-specific lifter (PQS), a vertical lifting type parking device (PCS), or a simple lifting type parking device (PJS). The present application does not limit the specific type of parking apparatus as long as its lifting power is derived from the motor 111.
The motor 111 of the present application is a lift motor. The motor 111 is, for example, a three-phase motor, but the present application is not limited thereto, and the motor 111 may be a single-phase motor. The motor 111 in this embodiment of the present application may be an ac asynchronous motor or a permanent magnet synchronous motor, and the motor may be controlled by adopting a constant speed control mode of direct drive, or by adopting a variable speed control mode such as variable frequency speed control, pole-changing logarithmic speed control, voltage and speed regulation, and series resistance speed regulation. The lifting device 112 is controlled by the motor 111 to lift or lower the vehicle carrying plate 113, and the lifting device 112 is, for example, a chain type lifting device, a gear type lifting device, a belt type lifting device, or a planetary wheel type lifting device. The vehicle loading plate 113 is, for example, a steel plate having a strong load carrying capacity.
The parking device may also comprise other necessary or non-necessary components, for example, the parking device also comprises steel structural parts, which consist of, for example, uprights, cross members and roof stringers.
The safety detection device 120 is connected to the power supply cable of the motor 111, and is configured to sample a voltage waveform and a current waveform of the motor 111 when the vehicle is unloaded and loaded, respectively, so as to calculate the weight of the object whose output torque of the motor 111 can be raised, and obtain the unloaded weight and the total loaded weight, thereby detecting whether the weight of the vehicle exceeds the rated load weight of the parking apparatus. Taking the motor 111 as a three-phase motor as an example, the safety detection device 120 is respectively connected to three power supply cables of the motor 111, and performs voltage waveform sampling and current waveform sampling on the three power supply cables respectively, so that the accuracy of judging the state of the motor and the accuracy of detecting results can be improved.
Optionally, the safety detection device 120 is further configured with an early warning function and a limiting function to send out an early warning when the parking equipment is overloaded or is about to be overloaded, and uses the safety protection device to limit in time, so as to avoid safety accidents.
In the parking system 100, the number of parking spaces of the parking apparatus is n, which may be a positive integer greater than or equal to 1. In some embodiments, the safety detection device 120 is connected to motors for a plurality of parking spaces in the parking apparatus at the same time, and a parking space identification module is provided in the safety detection device 120 to accurately identify the parking space being worked. Therefore, a plurality of parking spaces of the parking device can share one safety detection device 120, so that hardware cost and management cost are saved. In other embodiments, a corresponding safety detection device is provided adjacent each parking spot.
The safety inspection device 120 and the safety inspection method according to the embodiment of the present application will be described in detail with reference to fig. 2 to 4.
Fig. 2 shows a schematic view of a safety detection device according to a first embodiment of the present application. In fig. 2, an embodiment of the present application will be described in detail by taking the motor 111 as a three-phase motor as an example. It should be understood that the present application is not limited thereto, and the motor 111 may be a single-phase motor, and the types of motors of the present application are described above, which are not repeated herein, and the safety detection device and the safety detection method of the three-phase motor described below may be used for safety detection.
As shown in fig. 2, the security detection device 120 includes a sampling module 121 and a processing module 122. Optionally, the safety detection device 120 further includes an early warning module 123, a control module 124, and a power supply module 125.
The sampling module 121 is connected to the motor 111 of the parking apparatus for sampling a voltage waveform and a current waveform of the motor 111 of the parking apparatus to obtain a sampled voltage and a sampled current.
In some alternative embodiments, sampling module 121 includes a voltage sampling and processing module 1211 and a current sampling and processing module 1212.
In this embodiment, the voltage sampling and processing module 1211 is respectively connected to three power supply cables of the motor 111 to collect voltages Ua, ub and Uc on the power supply cables, and the voltage sampling and processing module 1211 respectively processes the voltages Ua, ub and Uc to obtain a voltage waveform, where the voltage waveform includes a plurality of sampled voltages at continuous or discontinuous moments, and the above-mentioned manner of processing the voltages includes, for example, performing a step-down process, performing a voltage waveform smoothing process, and the like.
The current sampling and processing module 1212 is configured to sample a current waveform of the motor 111, for example, the current sampling and processing module 1212 includes a current sensor (e.g., a transformer or a hall sensor) disposed on a power supply cable, so as to collect a current, and the current sampling and processing module 1212 processes the current to obtain a current waveform, where the current waveform includes a plurality of sampling currents at continuous or discontinuous moments, and the above-mentioned processing method includes, for example, steps of converting a large current signal of the motor into a small current signal, performing smoothing processing on the current waveform, and so on.
The processing module 122 is connected to the sampling module 123 for calculating the object weight, which the output torque of the motor 111 can boost, from the sampled voltage and the sampled current to obtain the payload weight of the parking device. Wherein, when the parking apparatus is empty, the sampling module 121 obtains a first set of sampling voltage and sampling current, and the processing module 122 obtains an empty weight of the parking apparatus; when the parking apparatus is loaded with the vehicle, the sampling module 121 obtains a second set of sampling voltages and sampling currents, and the processing module 122 obtains a total load weight of the parking apparatus; the processing module 122 then obtains a payload weight of the parking apparatus based on the difference between the total payload weight and the empty weight, and determines whether the vehicle is overweight based on the payload weight and the rated payload weight of the parking apparatus. It should be appreciated that the present application is not limited thereto, and that the sampling module 121 may also sample more sets of sampled voltages and sampled currents, from which the processing module 122 calculates an average of a plurality of empty weights and/or an average of a plurality of total load weights to obtain a more accurate net load weight.
In some alternative embodiments, processing module 122 includes a status detection unit 1221, a weight detection unit 1222, and an overload determination unit 1223.
The input terminals of the state detection unit 1221 are connected to the voltage sampling and processing module 1211 and the current sampling and processing module 1212 in the sampling module 121, respectively, to determine the operating state of the parking apparatus according to the sampled voltage and the sampled current (or the voltage waveform and the current waveform).
Specifically, the sampling module 121 measures the voltage waveform and the current waveform of the motor in real time, and the state detection unit 1221 judges whether the motor has started or not according to waveform characteristic values of the voltage waveform and the current waveform. For example, the determination method of the state detection unit 1221 is: and calculating whether waveform characteristic values of the voltage waveform and the current waveform exceed a first preset threshold value (for example, the current effective value or average value exceeds 20% of rated working current of the motor), and if so, considering that the motor is started.
If the state detection unit 1221 detects that the motor has been started, the state detection unit 1221 continues to determine whether the current vehicle-carrying board is operating in the raised state. For example, the determination method of the state detection unit 1221 is: and judging whether the current vehicle carrying plate works in an ascending state according to the measured voltage waveform or current waveform phase sequence (for example, if the motor rotates forward to ascend, the current vehicle carrying plate is considered to work in the ascending state when the voltage or current waveform phase sequence is forward, otherwise, the current vehicle carrying plate is in the descending state).
If the state detection unit 1221 detects that the vehicle-carrying plate has operated in the rising state, the state detection unit 1221 continues whether the current motor has operated in the steady state. For example, the determination method of the state detection unit 1221 is: and measuring the voltage waveform and the current waveform of the motor, judging that the fluctuation range of the characteristic value in the preset time does not exceed a second preset threshold value (for example, the fluctuation range of the current effective value or the average value in 3 periods does not exceed 3%), and considering that the current motor is operated in a steady state.
After the detection, the state detection unit 1221 determines that the vehicle-carrying plate of the parking facility has stably risen, and generates a control signal of the active state, and controls the weight detection unit 1222 to detect the payload weight of the parking facility.
The input ends of the weight detecting unit 1222 are respectively connected to the sampling module 121 and the state detecting unit 1222, and are used for calculating the net load weight of the parking equipment according to the sampling voltage and the sampling current when the state detecting unit judges that the vehicle carrying plate of the parking equipment stably rises.
Specifically, the weight detecting unit 1222 in the processing module 122 pre-stores rated operating parameters including rated voltage, rated current, rated rotation speed, rated frequency of the motor 111, pole pair number of the motor 111, and rated lifting speed of the parking equipment, and the weight detecting unit 1222 calculates the weight of the object whose output torque of the motor 111 can be raised according to the rated operating parameters, the sampled voltage and the sampled current. Optionally, the weight detecting unit 1222 has a first correction coefficient and/or a second correction coefficient set therein to correct the rated operating parameter.
Optionally, the weight detecting unit 1222 calculates the weight of the object whose motor output torque is liftable according to the rated operation parameter, the sampling voltage and the sampling current based on a weight detecting model, so as to obtain the net load weight of the parking apparatus, wherein the weight detecting model is:
wherein m is c Is the net load weight in kilograms (kg); n is the number of times the processing module 122 calculates the total load weight in times; m (k) is the total load weight at time k, and is expressed in kilograms (kg); m is m 0 Is an empty weight in kilograms (kg); u (u) j (k) The sampled voltage at time k is in volts(V)；i j (k) The unit is ampere (A) which is the sampling current at the moment k; q 1 As the first correction coefficient, regarding the accuracy of the rated operating parameter, generally 0.001 to 0.002 is taken; q 2 As the second correction coefficient, the motor structure parameter is generally 0.45-0.65; u (U) N Rated voltage in volts (V); i N Rated current in amperes (a); n is n N Rated rotational speed in revolutions per minute (r/min); f (f) N Rated frequency in hertz (Hz); p is the pole pair number of the motor 111 in pairs; v (V) N The unit is meter per second (m/min) for rated lifting speed.
It should be appreciated that the parameters in the weight detection model described above may be adaptively changed, for example, N may be any positive integer greater than or equal to 1; when the number of phases of the motor 111 is not 3, the subscripts j=a, b, c of the summation symbol Σ may also be replaced by the corresponding number of phases; when the unit of a certain parameter changes, the constant in the weight detection model also changes accordingly.
Optionally, when the parking device is loaded with a standard weight of the vehicle, the processing module 122 calculates the payload weight of the parking device, and obtains a first correction coefficient and a second correction coefficient according to a difference between the payload weight calculated at least twice and the standard weight, so as to accurately correct the payload weight detection result. For example, when the parking apparatus is loaded with a first weight of the vehicle or the first standard weight, the processing module calculates a first payload weight of the parking apparatus, and when the parking apparatus is loaded with a second weight of the vehicle or the second standard weight, the processing module calculates a second payload weight of the parking apparatus, and the processing module 122 obtains the first correction factor and the second correction factor based at least on the first payload weight, the first weight or the weight of the first standard weight, the second payload weight, the second weight or the weight of the second standard weight. The first weight and the second weight are known weight values, which can be obtained by using a factory name plate of an automobile, or can be obtained by weighing in advance by using an automobile weighing device such as a wagon balance. It will be appreciated that in order to obtain more accurate and more reliable first and second correction factors, multiple measurements may be made on each standard weight, and multiple measurements may also be made using more standard weights of different weights.
The overload judging unit 1223 is connected to the weight detecting unit 1222, and is configured to judge whether the parking equipment is overloaded and calculate the overload of the parking equipment according to the payload weight and the rated payload weight of the parking equipment, and provide corresponding alarm information output and control command output when the parking equipment device is overloaded. The overload judging unit 1223 compares the payload weight calculated in real time with the rated payload weight, and realizes real-time detection, alarm and limitation of overload. For example, when the overload judging unit 1223 judges that the payload weight exceeds 95% of the rated payload weight, an alarm message is issued, and the alarm message is displayed at the alarm module 123; when the net load weight exceeds 100% -110% of the rated load weight, the limiting function of the control module 124 is triggered, and the motor lifting loop is cut off, so that the vehicle carrying plate cannot be lifted again.
The alarm module 123 is connected to the overload determining unit 1223, and the control module 124 displays an alarm message when the overload determining unit 1223 determines that the parking device is overloaded and the overload reaches the first threshold. Optionally, the alarm module 123 is further configured to display information such as operating status information and debugging information of the security detection device 120, and perform a setting and debugging operation on the security detection device 120 by a user.
The control module 124 is connected to the overload determining unit 1223, and when the overload determining unit 1223 determines that the parking device is overloaded and the overload reaches the second threshold, the control module 124 provides a limited rising signal to cut off the rising loop of the overweight device. For example, the normally closed contact of the relay is connected in series to the ascent control circuit, and when the ascent limiting signal is received, the relay is electrified and attracted, and the normally closed contact is disconnected to cut off the ascent control circuit.
The power supply module 125 is connected to the processing module 122, the alarm module 123 and the control module 124 for supporting the normal operation of the processing module 122, the alarm module 123 and the control module 124.
Fig. 3 shows a schematic view of a security detection device according to a second embodiment of the present application. The basic structure of the safety detection device shown in fig. 3 is similar to that of the safety detection device shown in fig. 2, and the same points are not repeated here.
As shown in fig. 3, the number of parking spaces of the parking apparatus in this embodiment is n, where n may be a positive integer greater than or equal to 1, and a lifting motor is disposed in each parking space. The safety detection device 120 is connected to motors 1111 to 111n of a plurality of parking spaces at the same time, and a parking space recognition module 126 is provided in the safety detection device 120 to accurately recognize a parking space being worked. In this embodiment, the motors 1111 to 111n of the plurality of parking spaces are respectively connected to a total power supply loop, and the sampling module 121 in the safety detection device 120 only needs to be connected to the total power supply loop, so as to sample voltage waveforms and current waveforms of the parking spaces in operation for safety detection.
In this embodiment, a main contact of a contactor is disposed in each lifting motor, an auxiliary contact of a contactor is disposed in the safety detection device 120, and the parking space identification module 126 identifies the number of the parking space to be lifted currently by detecting the on-off condition of a relay or a contactor in a control loop of each parking space lifting motor, or by communicating with a controller.
Therefore, in this embodiment, a plurality of parking spaces of the parking apparatus can share one safety detection device 120, thereby saving hardware cost and management cost.
Fig. 4 shows a flow chart of a security detection method according to an embodiment of the present application. The flow chart shown in fig. 4 is merely an example of the present application and should not unduly limit the scope of the present application. Those of ordinary skill in the art will recognize many variations, substitutions, and modifications, for example, may be added, removed, substituted, rearranged, and the various steps illustrated in fig. 4.
As shown in fig. 4, the security detection method includes steps S1 to S4.
Optionally, before step S1, the security detection method further includes: when the number of parking spaces of the parking equipment is multiple, the working parking spaces are identified. For example, a main contact of a contactor is arranged in each lifting motor, an auxiliary contact of a contactor is arranged in the safety detection device, and the number of the current parking space to be lifted is identified by detecting the on-off condition of a relay or a contactor in a control loop of each parking space lifting motor or by communicating with a controller. The motors of the plurality of parking spaces are respectively connected to the total power supply loop, so that in the subsequent steps, the motors of the parking spaces in operation can be subjected to voltage waveform sampling and current waveform sampling through the total power supply loop.
In step S1, voltage waveform sampling and current waveform sampling are performed on the motor of the parking space being operated to obtain a sampling voltage and a sampling current, wherein a first set of sampling voltage and sampling current are obtained when the parking equipment is empty, and a second set of sampling voltage and sampling current are obtained when the parking equipment is loaded with a vehicle.
In step S2, it is determined whether the vehicle carrying plate of the parking apparatus is in a stable ascending state according to the voltage waveform and the current waveform.
In step S3, when the vehicle carrying plate of the parking device is in a stable ascending state, calculating the object weight which can be lifted by the output torque of the motor according to the sampling voltage and the sampling current, wherein the empty load weight of the parking device is obtained according to the first group of sampling voltage and the sampling current, and the total load weight of the parking device is obtained according to the second group of sampling voltage and the sampling current.
In this step, calculating the object weight that the output torque of the motor can boost from the sampled voltage and the sampled current includes: and calculating the no-load weight and the total load weight according to rated working parameters, sampling voltage and sampling current based on a weight detection model, wherein the rated working parameters comprise rated voltage, rated current, rated rotating speed, rated frequency, motor pole pair number and rated lifting speed.
Optionally, the first correction factor and/or the second correction factor are set to correct the nominal operating parameter.
In this embodiment, the weight detection model is:
wherein m is c Is the net load weight in kilograms (kg) The method comprises the steps of carrying out a first treatment on the surface of the N is the number of times the processing module 122 calculates the total load weight in times; m (k) is the total load weight at time k, and is expressed in kilograms (kg); m is m 0 Is an empty weight in kilograms (kg); u (u) j (k) The voltage is the sampling voltage at time k, and the unit is volt (V); i.e j (k) The unit is ampere (A) which is the sampling current at the moment k; q 1 As the first correction coefficient, regarding the accuracy of the rated operating parameter, generally 0.001 to 0.002 is taken; q 2 As the second correction coefficient, the motor structure parameter is generally 0.45-0.65; u (U) N Rated voltage in volts (V); i N Rated current in amperes (a); n is n N Rated rotational speed in revolutions per minute (r/min); f (f) N Rated frequency in hertz (Hz); p is the pole pair number of the motor, and the unit is the pair; v (V) N The unit is meter per second (m/min) for rated lifting speed.
In step S4, it is determined whether the weight of the vehicle exceeds the rated load capacity of the parking apparatus based on the difference between the total load weight and the empty load weight.
In summary, the embodiment of the application provides a safety detection device, a parking system and a safety detection method, which can calculate the weight of a vehicle in real time only by using the voltage waveform and the current waveform of a motor and rated operating parameters of equipment, can realize real-time detection, alarm and limitation of the parking device, ensure the operation safety of the parking device, and can effectively prevent the occurrence of vehicle damage and safety accidents caused by overload.
According to the safety detection device, the parking system and the safety detection method, a weight sensor is not required to be installed on parking equipment, a frequency converter is not required to be relied on to output signals, the real-time performance and the accuracy of detection are greatly improved, and the compatibility of the safety detection device is improved.
The weight measurement model provided by the embodiment of the application considers the influence of factors such as motor voltage fluctuation, inaccurate rated parameters and the like on weight measurement, ensures the accuracy of weight measurement, has the advantages of simple structure, convenient installation and wiring, no maintenance, low cost and the like, and has good application and popularization values.
The safety detection device, the parking system and the safety detection method can be applied to parking equipment comprising a plurality of parking spaces, and the plurality of parking spaces can share one safety detection device, so that hardware cost and management cost are saved.
It should be noted that in this document relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Embodiments in accordance with the present invention, as described above, are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (12)
1. A safety detection device for a parking apparatus, comprising:
the sampling module is used for sampling voltage waveforms and current waveforms of the motor of the parking equipment so as to obtain sampling voltage and sampling current; and
a processing module for calculating the object weight which can be lifted by the output torque of the motor according to the sampling voltage and the sampling current,
when the parking equipment is empty, the sampling module obtains a first group of sampling voltage and sampling current, and the processing module obtains the empty weight of the parking equipment;
when the parking equipment is loaded with a vehicle, the sampling module obtains a second group of sampling voltage and sampling current, and the processing module obtains the total load weight of the parking equipment;
the processing module judges whether the weight of the vehicle exceeds the rated load capacity of the parking equipment according to the total load weight and the idle load weight.
2. The security detection device of claim 1, further comprising: the parking space identification module is used for identifying the working parking space when the number of the parking spaces of the parking equipment is a plurality of,
the parking equipment comprises a parking equipment, a sampling module, a power supply module, a control module and a control module, wherein the motors of the parking equipment are connected to a total power supply loop, and the sampling module samples voltage waveforms and current waveforms of the parking space motors which are working through the total power supply loop.
3. The safety inspection device according to claim 1, wherein the processing module pre-stores rated operating parameters including rated voltage, rated current, rated rotational speed, rated frequency, pole pair number of motors of the motor, and rated lifting speed of the parking equipment,
and the processing module calculates the object weight which can be lifted by the motor output torque according to the rated working parameter, the sampling voltage and the sampling current.
4. A safety device according to claim 3, wherein the processing module has a first correction factor and/or a second correction factor provided therein to correct the nominal operating parameter.
5. The safety detection device of claim 4, wherein the processing module calculates an object weight that the motor output torque can lift from the rated operating parameter, the sampled voltage, and the sampled current based on a weight detection model to obtain a net load weight of the parking apparatus, the weight detection model being:
wherein m is c For the net load weight, N is the number of times the processing module calculates the total load weight, m (k) is the total load weight at time k, m 0 For the empty weight, u j (k) I is the sampling voltage at time k j (k) For the sampling current at time k, q 1 For the first correction factor, q 2 For the second correction coefficient, U N For the rated voltage, i N For the rated current, n N For the rated rotation speed f N For the nominal frequency, p is the pole pair number of the motor, V N And the rated lifting speed is set.
6. The safety detection device of claim 4, wherein the processing module calculates a first payload weight of the parking device when the parking device is loaded with a first weight of the vehicle or a first standard weight,
when the parking apparatus is loaded with a second weight of the vehicle or a second standard weight, the processing module calculates a second payload weight of the parking apparatus,
the processing module obtains the first correction factor and the second correction factor based at least on the first payload weight, the first weight, or the weight of the first standard weight, the second payload weight, the second weight, or the weight of the second standard weight.
7. The security detection device of claim 1, wherein the processing module comprises:
the state detection unit is used for judging the working state of the parking equipment according to the sampling voltage and the sampling current;
the weight detection unit is used for calculating the empty load weight and the total load weight of the parking equipment according to the sampling voltage and the sampling current when the state detection unit judges that the vehicle carrying plate of the parking equipment stably rises, and calculating the net load weight according to the empty load weight and the total load weight; and
and the overload judging unit is used for judging whether the parking equipment is overloaded or not and calculating the overload of the parking equipment according to the payload weight and the rated load capacity of the parking equipment.
8. The security detection device of claim 7, further comprising:
the alarm module is used for displaying alarm information when the overload judging unit judges that the parking equipment is overloaded and the overload reaches a first threshold value; and/or
And the control module is used for providing a limited rising signal to cut off a rising loop of the parking equipment when the overload judging unit judges that the parking equipment is overloaded and the overload reaches a second threshold value.
9. A parking system, comprising:
a parking apparatus; and
a safety detection device as claimed in any one of claims 1 to 8 for detecting whether the parking apparatus is overloaded.
10. A security detection method comprising:
sampling voltage waveforms and current waveforms of a motor of a parking device to obtain sampling voltages and sampling currents, wherein a first set of sampling voltages and sampling currents are obtained when the parking device is empty, and a second set of sampling voltages and sampling currents are obtained when the parking device is loaded with a vehicle;
calculating the weight of an object with the lifting output torque of the motor according to the sampling voltage and the sampling current, wherein the empty load weight of the parking equipment is obtained according to a first group of the sampling voltage and the sampling current, and the total load weight of the parking equipment is obtained according to a second group of the sampling voltage and the sampling current; and
and judging whether the weight of the vehicle exceeds the rated load capacity of the parking equipment according to the total load weight and the idle load weight.
11. The security detection method of claim 10, further comprising: when the number of the parking spaces of the parking equipment is a plurality of, identifying the working parking spaces,
the parking equipment comprises a parking equipment, a plurality of motors, a total power supply loop, a voltage waveform sampling device and a current waveform sampling device, wherein the motors of the parking equipment are connected to the total power supply loop, and the voltage waveform sampling and the current waveform sampling device are used for sampling the voltage waveform and the current waveform of the motors of the parking space which are working through the total power supply loop.
12. The safety detection method according to claim 10, wherein calculating an object weight that the output torque of the motor can raise from the sampling voltage and the sampling current includes:
calculating the net load weight according to rated working parameters, the sampling voltage and the sampling current based on a weight detection model, wherein the rated working parameters comprise rated voltage, rated current, rated rotating speed, rated frequency and pole pair number of the motor and rated lifting speed of the parking equipment;
setting a first correction coefficient and/or a second correction coefficient to correct the rated working parameter;
the weight detection model is as follows:
wherein m is c For the net load weight, N is the number of times the total load weight is calculated, m (k) is the total load weight at time k, m 0 For the empty spaceLoad weight, u j (k) I is the sampling voltage at time k j (k) For the sampling current at time k, q 1 For the first correction factor, q 2 For the second correction coefficient, U N For the rated voltage, I N For the rated current, n N For the rated rotation speed f N For the nominal frequency, p is the pole pair number of the motor, V N And the rated lifting speed is set.
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| CN202311282417.7A CN117516676A (en) | 2023-10-07 | 2023-10-07 | Safety detection device, parking system, and safety detection method |
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| CN202311282417.7A CN117516676A (en) | 2023-10-07 | 2023-10-07 | Safety detection device, parking system, and safety detection method |
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