CN111049885A - Intelligent weighing unattended system of Internet of things - Google Patents

Intelligent weighing unattended system of Internet of things Download PDF

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Publication number
CN111049885A
CN111049885A CN201911195884.XA CN201911195884A CN111049885A CN 111049885 A CN111049885 A CN 111049885A CN 201911195884 A CN201911195884 A CN 201911195884A CN 111049885 A CN111049885 A CN 111049885A
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China
Prior art keywords
weighing
module
vehicle
information
weighing platform
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CN201911195884.XA
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Chinese (zh)
Inventor
熊鑫
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Wuhan City Six Standard Weighing Apparatus Co ltd
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Wuhan City Six Standard Weighing Apparatus Co ltd
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Priority to CN201911195884.XA priority Critical patent/CN111049885A/en
Publication of CN111049885A publication Critical patent/CN111049885A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/12Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • H04L67/125Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01GWEIGHING
    • G01G19/00Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/02Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
    • G01G19/03Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing during motion
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01GWEIGHING
    • G01G23/00Auxiliary devices for weighing apparatus
    • G01G23/01Testing or calibrating of weighing apparatus
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/18Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Computing Systems (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Multimedia (AREA)
  • Traffic Control Systems (AREA)

Abstract

An Internet of things intelligent weighing unattended system comprises an automatic reading device, a video monitoring device, an infrared monitoring device, a card swiping management device, a signal control management device and a control system; the automatic reading device is arranged on the weighing platform and is connected with the control system; the video monitoring device is arranged at the periphery of the weighing platform, is connected with the pound operating room and is connected with the control system; the card swiping management device is arranged at the front end of the weighing platform and is connected with the control system; the signal control management device is arranged on the ground at the tail end of the weighing platform and is connected with the control system in a wireless or wired mode; the system can automatically collect gross weight, tare weight information and vehicle weighing pictures, can automatically count net weight, automatically print, can realize real-time monitoring of data and pictures through local area network and internet connection, can correlate image information through inquiry of a pound order, can achieve all-round monitoring, is safe and intelligent to weigh, and effectively avoids the condition of committing personal fraud.

Description

Intelligent weighing unattended system of Internet of things
Technical Field
The invention relates to an intelligent weighing unattended system of an Internet of things.
Background
Electronic weighing machines have been widely used in the bulk materials industry. However, these electronic metering devices still stay on the level of auxiliary manual metering, manual reading, and re-aggregation by a specially-assigned person, and are seriously lagged behind the information management process of the whole enterprise.
Under the manual recording and metering, how to effectively monitor the whole metering process and prevent the fraud behaviors, the application and management efficiency is greatly improved to become a problem which is very concerned by enterprise leaders, and some enterprises adopt methods of frequently replacing a weigher, setting a weigher, installing an electronic monitoring device and the like to monitor the metering process, but the fraud behaviors cannot be fundamentally stopped.
Disclosure of Invention
The invention aims to provide an intelligent weighing unattended system based on the Internet of things, and at least one aspect of the problem is solved.
An Internet of things intelligent weighing unattended system comprises an automatic reading device, a video monitoring device, an infrared monitoring device, a card swiping management device, a signal control management device and a control system; the automatic reading device is arranged on the weighing platform and is connected with the control system; the video monitoring device is arranged at the periphery of the weighing platform, is connected with the pound operating room and is connected with the control system; the card swiping management device is arranged at the front end of the weighing platform and is connected with the control system; the signal control management device is arranged on the ground at the tail end of the weighing platform and is connected with the control system in a wireless or wired mode;
the automatic reading device comprises a weighing scale, a WIFI module and a deduction module, wherein the weighing scale is arranged at the bottom of the weighing platform, and the weighing scale can be used for performing tare weight measurement reading and gross weight measurement reading, calculating net weight and recording overweight time; the WIFI module is arranged on a shell of the metering weighing apparatus and can be connected with a network to acquire information; the deduction module is connected with the WIFI module, weighing policy information is obtained, and weighing deduction is carried out according to the policy information;
the video monitoring device comprises a weighing operation room video monitoring video, a weighing field multi-angle video monitoring video and a remote video monitoring module, wherein the remote video monitoring module comprises a network wireless module, the input end of the network wireless module is connected with the weighing field multi-angle video monitoring video and the weighing operation room video monitoring video, and the output end of the network wireless module is connected with a manager terminal device; the weighing field multi-angle video monitoring videos are arranged at the front end, the rear end and the side ends of the weighing platform, and the license plate information can be identified by the front-end monitoring videos;
the infrared monitoring devices are arranged at the front end and the rear end of the weighing platform and are used for identifying whether the weighing vehicle is completely arranged on the weighing platform or not;
the card swiping management device comprises an RFID recognizer and a tag card which is convenient for the RFID recognizer to recognize the information of the weighing vehicle, the RFID recognizer is arranged at the front end of the weighing platform, the tag card is arranged at the front end of the weighing vehicle, and when the weighing vehicle is close to the RFID recognizer, the RFID recognizer automatically reads the information of the vehicle;
the signal control management device comprises a ground induction coil control barrier, a traffic light and a barrier, wherein the ground induction coil control barrier is arranged at the position which is 10 meters away from the tail end of the weighing platform, the barrier and the traffic light are arranged at the front end of the weighing platform, and a railing of the barrier is used for intercepting the weighing vehicle from moving forwards when the railing is in a transverse state; the lamp cap part of the traffic light faces the rear part of the weighing platform to remind the vehicle behind to stop and move forwards;
the control system comprises an authority management module, a data acquisition module, a weighing data management module and a real-time query module, wherein the authority management module is used for limiting the limitation and modification of weighing information, and the data acquisition module is connected with a data acquisition port, acquires weighing information, monitoring information and vehicle identity information and forms a database; the weighing data management module is connected with the data acquisition module through an acquisition port and is used for weighing the tare weight measurement data, the gross weight measurement data and the net weight data of the vehicle, recording the overweight time data and weighing deduction data; the real-time query module is connected with the database and can call the database information in real time.
Preferably, the deduction module is connected with a traffic management violation system through a WIFI module, obtains traffic violation information of the weighed vehicle, and performs weighing deduction according to traffic records and weighing policy information.
Preferably, the intelligent lifting anti-collision device is arranged at the front end of the weighing platform and comprises a limit switch, a tire anti-collision table and an electric lifting column, the tire anti-collision table is arranged inside the front end of the weighing platform, a matching groove used for matching with the tire anti-collision table is formed in the end face of the weighing platform, the upper end of the electric lifting column is fixed with one end of the tire anti-collision table, the other end of the tire anti-collision table is connected with the edge of the matching groove through a hinge, the limit switch is a gravity spring electrode switch and is installed at the position 1-2 m in front of the tire anti-collision table, when a tire of the weighing vehicle passes through the limit switch, the electric lifting column drives the tire anti-collision table to obliquely rise from the inside of the weighing platform, the arc tire anti-collision table blocks the tire of the weighing vehicle, and the situation that the weighing vehicle mistakenly operates to rush or.
The invention has the beneficial effects that: the system can automatically collect gross weight, tare weight information and vehicle weighing pictures, can automatically count net weight, automatically print, can realize real-time monitoring of data and pictures through local area network and internet connection, can correlate image information through inquiry of a pound order, can achieve all-round monitoring, is safe and intelligent to weigh, and effectively avoids the condition of committing personal fraud.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic diagram of an infrared monitoring device.
Fig. 3 is a schematic structural diagram of the liftable anti-collision device.
Detailed Description
The invention is further illustrated by the following description and examples in conjunction with the accompanying drawings.
In fig. 1-3, an internet-of-things intelligent weighing unattended system comprises an automatic reading device, a video monitoring device 5, a data monitoring device, an infrared monitoring device 9, a card swiping management device 6, a signal control management device and a control system 7.
The automatic reading device comprises a weighing scale, a WIFI module 8 and a deduction module, the weighing scale is arranged at the bottom of the weighing platform 1, the automatic reading device is connected with the video monitoring device 5 to obtain the model of a weighed vehicle and the net weight information of the vehicle, and the weighing scale can automatically read the tare weight and the gross weight, calculate the net weight and record the overweight time; the WIFI module 8 is arranged on a shell of the metering weighing apparatus and can be connected with a network to acquire information; the deduction module is connected with the WIFI module 8, weighing policy information is obtained, weighing deduction is carried out on weighing data of the weighing scale according to the policy information, and recorded data are formed; meanwhile, the deduction module is connected with a traffic management violation system through the WIFI module 8, traffic violation information of the weighed vehicle is obtained, and comprehensive weighing deduction is carried out according to traffic records and weighing policy information. The weighing vehicle with few violations combines the preferential policy information of weighing, can give great deduction proportion, and for the weighing vehicle with many violations, the deduction proportion is relatively reduced.
The video monitoring device 5 comprises a weighing operation room video monitoring video, a weighing field multi-angle video monitoring video and a remote video monitoring module 11, the remote video monitoring module 11 comprises a network wireless module, the input end of the network wireless module is connected with the weighing field multi-angle video monitoring video and the weighing operation room video monitoring video, dead-corner-free video monitoring is achieved, the condition that illegal operation occurs is avoided, the output end of the network wireless module is connected with terminal equipment of a manager, and the manager can monitor or call monitoring pictures in real time conveniently; the administrator terminal device can be a mobile terminal device, such as a mobile computer, a tablet, a mobile phone and other small devices, and the purpose of sampling inspection and monitoring can be achieved without the need of being on site. The multi-angle video surveillance video of pound field is installed at the front and back end and the side of platform 1 of weighing, can monitor the integrality of weighing comprehensively, avoids artificial or other fraud situations, and the clear weight information of vehicle and driver information of acquireing to weigh are acquireed to the distinguishable license plate information of front end surveillance video.
Infrared monitoring device 9 is installed at weighing platform 1 front and back end, and infrared monitoring device 9 includes transmitting terminal and receiving terminal, establishes respectively in the both sides of weighing platform 1 front and back end, if any one end infrared monitoring device 9 sends the police dispatch newspaper, then indicates that the vehicle is not all on weighing platform 1, and the judgement discernment that from this can be better whether the vehicle of weighing goes up weighing platform 1 completely, need not the extra inspection of manpower.
The card swiping management device 6 comprises an RFID recognizer and a tag card which is convenient for the RFID recognizer to recognize information of the weighing vehicle, the RFID recognizer is arranged at the front end of the weighing platform 1, the tag card is arranged at the front end of the weighing vehicle, and when the weighing vehicle is close to the RFID recognizer, the RFID recognizer automatically reads the information of the vehicle.
The signal control management device comprises a ground induction coil control barrier, a traffic light and a barrier, the ground induction coil control barrier is arranged at the position which is 10 meters away from the tail end of the weighing platform 1, the barrier and the traffic light are arranged at the front end of the weighing platform 1, and a railing of the barrier is used for intercepting the weighing vehicle from moving forwards when in a transverse state; the lamp cap part of the traffic light faces the rear part of the weighing platform 1 to remind the rear vehicle of stopping and moving forwards;
the control system 7 comprises an authority management module, a data acquisition module, a weighing data management module and a real-time query module, wherein the authority management module is used for limiting weighing information limitation and modification, and the data acquisition module is connected with a data acquisition port, acquires weighing information, monitoring information and vehicle identity information and forms a database; the weighing data management module is connected with the data acquisition module through an acquisition port and is used for weighing the tare weight measurement data, the gross weight measurement data and the net weight data of the vehicle, recording the overweight time data and weighing deduction data; the real-time query module is connected with the database and can call the database information in real time.
The arrangement of the video monitoring device 5 mainly solves the key problem of preventing the privately cheating in the pound room management except that the accuracy of metering needs to be improved. Many cheating means, fast change and many related factors exist in the pound field, and how to prevent cheating or reduce cheating to the maximum extent is a key problem concerned by enterprise management.
The system introduces a video monitoring device 5 to carry out full-range monitoring on the service of the pound field, and a manager can check video information at any time, so that the system is convenient for tracing responsibility and provides deterrence for cheaters.
The main characteristics are as follows:
and multi-point video monitoring and photographing are supported, and the vehicle is recorded in the whole process from entering the parking lot to weighing and finishing leaving the parking lot.
And the real-time site of the weighing site is remotely monitored by a leader in an office at a different place.
Key links such as gross weight, tare weight and entrance guard inspection are automatically photographed, and the photos are automatically stored in a photo library along with the weighing list for viewing at any time.
The system can automatically identify and sort the video data corresponding to a certain weighing bill, and the photo library can carry out comparison management.
The infrared monitoring device 9 is arranged, the front wheel and the rear wheel of the vehicle are effectively controlled to be not completely weighed through the system when the vehicle is weighed, and the driver is indoors, so that the visual field is limited, and the driver cannot timely find whether the vehicle is completely weighed.
And judging whether the card reading device reads according to the infrared monitoring signal.
The system can control the two vehicles to weigh at the same time.
The signal control management device strengthens the management of the weighing vehicle sequence of the weight house through the system and can manage the field vehicles through a barrier and traffic lights. The road barrier and the traffic lights are controlled by the ground induction coils when the vehicle enters the field, and the problem that the vehicle is not weighed in sequence can be avoided through the management of the devices on the field weighing vehicle.
The infrared monitoring device 9: the system effectively controls the front wheel and the rear wheel to not completely weigh when the vehicle weighs, and the driver is indoors, so that the visual field is limited, and whether the vehicle completely weighs or not can not be timely found. And judging whether the card reading device reads according to the infrared monitoring signal. The system can control the two vehicles to weigh at the same time.
The invention also comprises an intelligent lifting anti-collision device arranged on the front end of the weighing platform 1, the intelligent lifting anti-collision device comprises a limit switch, a tire anti-collision platform 2 and an electric lifting column 3, the tire anti-collision platform 2 is characterized in that a matching groove for matching the tire anti-collision platform 2 is arranged on the end surface of the weighing platform 1 inside the front end of the weighing platform 1 of the tire anti-collision platform 2, the upper end of an electric lifting column 3 is fixed with one end of the tire anti-collision platform 2, the other end of the tire anti-collision platform 2 is connected with the edge of the matching groove through a hinge 4, a limit switch is a gravity spring electrode switch and is arranged at the position 1-2 meters ahead of the tire anti-collision platform 2, when the front tire of the weighing vehicle passes through the limit switch, the electric lifting column 3 drives the tire anti-collision platform 2 to obliquely lift from the inside of the weighing platform 1, and the arc-shaped tire anti-collision platform 2 blocks the front tire of the weighing vehicle, so that the situation that the weighing vehicle is mistakenly operated and rushes to work or slides without braking is avoided.
The invention also includes the controlling device 10 of the banister, the controlling device 10 of the banister is connected with infrared monitoring device 9, managing device 6 of the card swiping, signal control and managing device, the controlling device of the banister includes the wireless remote control and rises and falls the pole, can connect the traffic light to warn, the ground sense, the invention installs three banisters in the exit end of door diameter and truck scale, the ground sense coil combines the vehicle detector and cooperates with it to use, after weighing the vehicle and weighing, the software system sends the order of "lifting up" of the banister, when the ground sense coil of the exit end detects the vehicle, the infrared detector can't detect the object to block too, the banister drops. The entrance and the exit of the vehicle are effectively controlled.
The invention can realize unattended operation. The invention can realize unattended operation by matching with a contactless induction card swiping technology, when a vehicle is stopped on a weighing platform, vehicle information is automatically acquired through card swiping equipment, after the weighing data is judged to be stable, a picture is snapshotted and simultaneously the gross weight or the tare weight is stored, a camera can be used for snapshotting the picture when the driver swipes the card, then a document is printed, the vehicle is released, and then the next vehicle is started. When a certain vehicle passes through the tare weight for the second time, the software automatically calls out the collected vehicle information, after the software judges that the vehicle is stable, the software starts to take a candid photograph of the tare weight, simultaneously saves the weight, then combines the weight with the data obtained when the tare weight is passed for the first time into a record, calculates the net weight, and then prints documents. The gross weight, tare weight and net weight data of the vehicle are stored in the computer, the picture when the gross weight and tare weight are stored, the card number and the vehicle number of the driver are in one-to-one correspondence, if the vehicle number and the card number on the picture are not consistent and the picture of the driver is not consistent, the driver is suspected of cheating, so that the common driver dares not to exchange the vehicle, and the gross weight weighing and tare weighing are ensured to be the same vehicle.
It is worth mentioning that: in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; mechanical connection is possible, and a person of ordinary skill in the art can understand the specific meaning of the above terms in the present invention according to specific situations.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (5)

1. The utility model provides an unmanned on duty system of thing networking intelligence weighing which characterized in that: the system comprises an automatic reading device, a video monitoring device, an infrared monitoring device, a card swiping management device, a signal control management device and a control system; the automatic reading device is arranged on the weighing platform and is connected with the control system; the video monitoring device is arranged at the periphery of the weighing platform, is connected with the pound operating room and is connected with the control system; the card swiping management device is arranged at the front end of the weighing platform and is connected with the control system; the signal control management device is arranged on the ground at the tail end of the weighing platform and is connected with the control system in a wireless or wired mode;
the automatic reading device comprises a weighing scale, a WIFI module and a deduction module, wherein the weighing scale is arranged at the bottom of the weighing platform, and the weighing scale can be used for performing tare weight measurement reading and gross weight measurement reading, calculating net weight and recording overweight time; the WIFI module is arranged on a shell of the metering weighing apparatus and can be connected with a network to acquire information; the deduction module is connected with the WIFI module, weighing policy information is obtained, and weighing deduction is carried out according to the policy information;
the video monitoring device comprises a weighing operation room video monitoring video, a weighing field multi-angle video monitoring video and a remote video monitoring module, wherein the remote video monitoring module comprises a network wireless module, the input end of the network wireless module is connected with the weighing field multi-angle video monitoring video and the weighing operation room video monitoring video, and the output end of the network wireless module is connected with a manager terminal device; the weighing field multi-angle video monitoring videos are arranged at the front end, the rear end and the side ends of the weighing platform, and the license plate information can be identified by the front-end monitoring videos;
the infrared monitoring devices are arranged at the front end and the rear end of the weighing platform and are used for identifying whether the weighing vehicle is completely arranged on the weighing platform or not;
the card swiping management device comprises an RFID recognizer and a tag card which is convenient for the RFID recognizer to recognize the information of the weighing vehicle, the RFID recognizer is arranged at the front end of the weighing platform, the tag card is arranged at the front end of the weighing vehicle, and when the weighing vehicle is close to the RFID recognizer, the RFID recognizer automatically reads the information of the vehicle;
the signal control management device comprises a ground induction coil control barrier, a traffic light and a barrier, wherein the ground induction coil control barrier is arranged at the position which is 10 meters away from the tail end of the weighing platform, the barrier and the traffic light are arranged at the front end of the weighing platform, and a railing of the barrier is used for intercepting the weighing vehicle from moving forwards when the railing is in a transverse state; the lamp cap part of the traffic light faces the rear part of the weighing platform to remind the vehicle behind to stop and move forwards;
the control system comprises an authority management module, a data acquisition module, a weighing data management module and a real-time query module, wherein the authority management module is used for limiting the limitation and modification of weighing information, and the data acquisition module is connected with a data acquisition port, acquires weighing information, monitoring information and vehicle identity information and forms a database; the weighing data management module is connected with the data acquisition module through an acquisition port and is used for weighing the tare weight measurement data, the gross weight measurement data and the net weight data of the vehicle, recording the overweight time data and weighing deduction data; the real-time query module is connected with the database and can call database information in real time;
still including establishing the intelligent lift buffer stop on weighing platform front end.
2. The intelligent weighing unattended system of the internet of things according to claim 1, wherein: the deduction module is connected with a traffic management violation system through the WIFI module, obtains traffic violation information of the weighed vehicle, and carries out weighing deduction according to traffic records and weighing policy information.
3. The intelligent weighing unattended system of the internet of things according to claim 1, wherein: the intelligent lifting anti-collision device comprises a limit switch, a tire anti-collision table and an electric lifting column, the tire anti-collision table is arranged inside the front end of the weighing platform, a matching groove used for matching the tire anti-collision table is formed in the end face of the weighing platform, the upper end of the electric lifting column is fixed with one end of the tire anti-collision table, the other end of the tire anti-collision table is connected with the edge of the matching groove through a hinge, the tire anti-collision table is installed in the front position of the tire anti-collision table, when a front tire of a weighing vehicle passes through the limit switch, the electric lifting column drives the tire anti-collision table to be obliquely lifted from the inside of the weighing platform, and the arc-.
4. The intelligent weighing unattended system of the internet of things according to claim 1, wherein: the limit switch is a gravity spring electrode switch.
5. The intelligent weighing unattended system of the internet of things according to claim 1, wherein: the intelligent traffic light system is characterized by further comprising a barrier gate control device, the barrier gate control device is connected with the infrared monitoring device, the card swiping management device and the signal control management device, the barrier gate control device comprises a wireless remote control lifting rod, a traffic light can be externally connected for warning and sensing the ground, three barrier gates are installed at the exit ends of the door diameter and the truck scale, and the ground sensing coil is combined with a vehicle detector and matched with the barrier gates for use.
CN201911195884.XA 2019-11-29 2019-11-29 Intelligent weighing unattended system of Internet of things Pending CN111049885A (en)

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CN111402530A (en) * 2019-12-23 2020-07-10 宁波柯力传感科技股份有限公司 Data integration method of unattended weighing system based on face recognition
CN112033508A (en) * 2020-09-01 2020-12-04 湖南美石信息技术有限公司 Automatic weighing method, system and computer readable storage medium
CN112729505A (en) * 2020-12-21 2021-04-30 中物智建(武汉)科技有限公司 Unattended intelligent wagon balance system

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Application publication date: 20200421