CN111320082A

CN111320082A - Method and device for determining weight of goods and warehouse management method

Info

Publication number: CN111320082A
Application number: CN202010033248.3A
Authority: CN
Inventors: 李永林; 王键; 陈建华
Original assignee: Shanghai Ouyeel Logistics Co ltd
Current assignee: Shanghai Ouyeel Logistics Co ltd
Priority date: 2019-01-17
Filing date: 2020-01-13
Publication date: 2020-06-23

Abstract

The invention provides a method and a device for determining the weight of goods and a warehouse management method, wherein the method for determining the weight of goods specifically comprises the steps of acquiring a no-load current signal and a full-load current signal corresponding to a travelling crane spreader in no-load and full-load states respectively; acquiring corresponding full load weight when the lifting appliance is full load; acquiring a corresponding cargo current signal when a cargo to be detected is hoisted by a crane hoist; and determining the weight of the goods to be measured according to a preset algorithm. By the method, the weight of the goods can be observed more visually and conveniently, and the weighing scale is not additionally arranged on the lifting appliance in the weighing process, so that the height of the travelling operation is not influenced, the placement of goods in a warehouse is facilitated, and the management of the warehouse is facilitated.

Description

Method and device for determining weight of goods and warehouse management method

The present application claims priority of chinese patent application filed on 17.01.2019 under the name of "a monitoring device for warehouse goods" with the application number of 201920079451.7 from the chinese patent office, the entire contents of which are incorporated herein by reference.

Technical Field

The invention relates to the field of logistics, in particular to a method and a device for determining the weight of goods and a warehouse management method.

Background

In the steel warehouse, how to timely and accurately acquire the weight of the goods when the goods are stored and taken so as to stack more goods in a limited space is always a concern on the warehouse side. The goods are weighed conveniently and accurately, and the goods can be managed better in a warehouse.

The traditional goods weighing method is carried out by additionally arranging a scale on a lifting hook of a travelling crane, and the method has the disadvantages of higher cost and inconvenience in watching weight readings because the travelling crane is too high and the scale is hung higher; and because the balance is installed in the travelling crane, the operation height of the travelling crane can be influenced, and the storage capacity of a warehouse is greatly reduced.

Disclosure of Invention

The invention aims to solve the problems that the existing goods weighing method is inconvenient to observe readings and limits the storage capacity of a warehouse.

In order to solve the above technical problem, an embodiment of the present invention provides a method for determining a weight of a cargo, including the following steps:

a1, acquiring a no-load current signal and a full-load current signal corresponding to a travelling crane sling in a no-load state and a full-load state respectively;

step A2, acquiring the corresponding full load weight when the lifting appliance is fully loaded;

a3, acquiring a corresponding cargo current signal of a cargo to be detected in a state that the cargo is lifted by a crane spreader;

step A4, determining the weight of the goods to be detected according to a preset algorithm;

the preset algorithm is as follows: the weight of the goods to be detected is the full load weight (goods current value-no-load current value)/(full load current value-no-load current value), wherein the goods current signal value, the no-load current signal value and the full load current signal value are respectively the values corresponding to the goods current signal, the no-load current signal and the full load current signal.

Further, in the above method provided by the embodiment of the present invention, the no-load current signal, the full-load current signal, and the cargo current signal are converted from the resistance signal output by the sensor.

Further, in the method provided in the embodiment of the present invention, step a3 specifically includes:

a31, acquiring a current signal corresponding to a cargo to be detected in the process of being lifted by a crane spreader in real time;

step A32, monitoring and determining the change value of the current signal;

and step A33, when the change value of the current signal is lower than a preset threshold value, acquiring and storing the current signal at the moment as a cargo current signal.

Further, in the foregoing method provided in this embodiment of the present invention, step a3 further includes:

step A34, determining the state of the goods to be tested according to the current value change of the current signal at the initial time, wherein the initial time is the time when the change value of the current signal reaches the preset value; wherein the content of the first and second substances,

at the initial moment, if the current value is increased, determining that the goods to be detected are hoisted;

and at the initial moment, if the current value is reduced, determining that the goods to be measured are put down.

Correspondingly, the embodiment of the invention also provides a device for determining the weight of the cargo, which comprises:

the first acquiring unit is used for acquiring corresponding full load weight when the travelling crane lifting appliance is full load;

the second acquisition unit is used for acquiring a no-load current signal and a full-load current signal corresponding to the travelling crane sling in a no-load state and a full-load state respectively;

the third acquisition unit is used for acquiring a cargo current signal corresponding to the cargo to be detected in a state that the cargo to be detected is lifted by the crane spreader;

the calculating unit is used for determining the weight of the goods to be detected according to a preset algorithm;

Further, in the above apparatus provided in the embodiment of the present invention, further includes:

the sensor is used for respectively outputting corresponding resistance signals when the travelling crane is in a state of no load, full load and hoisting of goods to be detected;

and the conversion unit is used for converting the resistance signal output by the sensor into a current signal.

Further, in the apparatus provided in the embodiment of the present invention, the third obtaining unit specifically includes:

the signal collector is used for acquiring a current signal corresponding to the goods to be detected in real time in the process of being lifted by the crane sling;

the monitor is used for monitoring and determining the change value of the current signal;

and the comparator is used for comparing the change value of the current signal with a preset threshold value, and acquiring and storing the current signal at the moment as a cargo current signal when the change value of the current signal is lower than the preset threshold value.

Further, in the above apparatus provided in an embodiment of the present invention, the third obtaining unit further includes:

the judger is used for determining the state of the goods to be detected according to the current value change of the current signal at the initial moment, wherein the initial moment is the moment when the change value of the current signal reaches a preset value; wherein the content of the first and second substances,

Correspondingly, the embodiment of the invention also provides a warehouse management method, which comprises the following steps:

the weight of the goods to be measured is obtained by the method for determining the weight of the goods provided by the embodiment of the invention.

Further, in the warehouse management method provided in the embodiment of the present invention, the method further includes:

establishing an inventory database, wherein standard weight and position information of goods are stored in the inventory database;

comparing and matching the weight of the goods to be detected with all standard weights in the stock database;

acquiring corresponding position information of goods to be detected in an inventory database;

and carrying out warehousing management on the goods to be detected based on the position information.

Further, in the warehouse management method provided in the embodiment of the present invention, acquiring the corresponding location information of the goods to be tested in the warehouse database specifically includes:

when the difference value between the weight of the goods to be detected and a certain standard weight in the inventory database is smaller than a preset value, acquiring position information corresponding to the standard weight stored in the inventory database;

and when the difference value between the weight of the goods to be detected and each standard weight is larger than a preset value, setting a group of position information for the weight of the goods to be detected as the position of the goods to be detected in the warehouse, and storing the weight of the goods to be detected and the corresponding position information thereof into the inventory database.

comparing and matching the weight of the goods to be delivered with all standard weights in the inventory database;

acquiring corresponding position information of goods to be delivered out of a warehouse in a warehouse database;

and carrying out ex-warehouse management on goods to be ex-warehouse based on the position information.

The technical scheme of the invention has the following beneficial effects:

the invention provides a method for determining the weight of goods, which comprises the steps of acquiring a no-load current signal and a full-load current signal corresponding to a travelling crane sling in a no-load state and a full-load state respectively; acquiring corresponding full load weight when the lifting appliance is full load; acquiring a corresponding cargo current signal when a cargo to be detected is hoisted by a crane hoist; and determining the weight of the goods to be measured according to a preset algorithm. Through the steps, the weight of the goods can be obtained more visually and conveniently, and the weighing scale is not additionally arranged on the lifting appliance in the weighing process, so that the height of the travelling operation is not influenced, the placement of goods in a warehouse is facilitated, and the management of the warehouse is facilitated.

Drawings

FIG. 1 is a schematic flow diagram of a method of monitoring warehouse cargo;

FIG. 2 is a schematic diagram of a connection of a warehouse cargo monitoring device according to an embodiment of the present invention;

FIG. 3 is a schematic logic diagram of a method for monitoring warehouse cargo during implementation;

FIG. 4 is a schematic illustration of an embodiment of a warehouse cargo monitoring apparatus of the present invention;

FIG. 5 is a flow chart of a method for determining the weight of cargo according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an apparatus for determining the weight of cargo according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a third obtaining unit in the apparatus for determining the weight of the cargo according to the embodiment of the present invention;

fig. 8 is a flowchart of a warehouse management method according to an embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the present invention will be made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

The monitoring method of the warehouse goods is first described in detail with reference to the accompanying drawings.

As shown in fig. 1, the monitoring method of the warehouse goods includes the following steps:

step S1, acquiring a first position coordinate when the travelling crane lifts the goods;

in step S1, coordinates of the warehouse may be divided and set, each warehouse location in the warehouse may also correspond to corresponding coordinates, when a cargo is placed in the warehouse location, the coordinates of the cargo in the warehouse location may be represented by the coordinates of the warehouse location, when a crane is in the warehouse, the position coordinates of the crane may be obtained in real time by a positioning device, the position coordinates may be transmitted to a monitoring system, so that the position of the crane may be monitored at any time, when the crane lifts the cargo, the first position coordinates of the crane at that time may be obtained, the first position coordinates may include the coordinates of the crane in the horizontal direction and the coordinates of the crane in the height direction, some cranes may include a cart, a dolly, and a hook, the hook is disposed on the dolly, the dolly moves on the cart, the first position coordinates of the crane at that time may be the coordinates of the hook, the coordinates of the hook may more accurately represent the coordinates of the warehouse location where the lifted cargo is located, the cargo information of the cargo hoisted by the travelling crane can be obtained according to the first position coordinate, for example, the number of the cargo, the storage position where the cargo is located before hoisting, and the like, and the cargo hoisted by the travelling crane can be obtained according to the first position coordinate, wherein the cargo is the cargo and the cargo on the storage position.

Step S2, acquiring a second position coordinate when the travelling crane puts down the goods;

in step S2, when the traveling crane drops the goods, the second position coordinates of the traveling crane when the goods are dropped may be obtained and recorded, the specific position of the traveling crane in the warehouse may be obtained through the second position coordinates, the position of the goods when the traveling crane drops the goods may be determined according to the second position coordinates, and the position coordinates of the goods may be obtained, where the goods are placed by the traveling crane, and the position coordinates of the goods may include coordinates of the goods in the horizontal direction and the height direction.

And step S3, judging the state of the goods according to the first position coordinate and the second position coordinate, and recording the state of the goods.

In step S3, the position coordinates of the lifted goods can be obtained according to the first position coordinates, the storage location where the lifted goods are located can be obtained through the position coordinates of the goods, which storage location the lifted goods are located can be obtained, the position where the lifted goods are located when the lifted goods are put down can be obtained according to the second position coordinates, whether the goods are delivered from the warehouse, put in the warehouse, moved to the warehouse or invalid operation can be judged according to the lifted position and the put down position of the goods, the states of the goods are recorded, and the states of the goods can be transmitted and stored in a system or a server through a wireless network, so that the states of the goods can be searched or known, management or shipment of subsequent goods is facilitated, errors or omissions in manual recording are prevented, and human labor is reduced.

In the specific application process, the method can further comprise the following steps:

and step S0, judging the traveling crane to lift or put down the goods according to the current of the traveling crane, wherein when the current of the traveling crane is larger than the upper limit value, the traveling crane is judged to lift the goods, and when the current of the traveling crane is smaller than the lower limit value, the traveling crane is judged to put down the goods.

In step S0, since the current bands of the traveling vehicles for hoisting and lowering the cargo are different and have a large difference, it can be determined whether the cargo is hoisted or lowered by the traveling vehicles by the current of the traveling vehicles, so that the behavior state of the traveling vehicles can be accurately determined. For example, the current of the traveling crane is generally 0-4mA when the traveling crane does not hoist the cargo, the current is increased when the traveling crane hoists the cargo, the value of the current is changed along with the weight of the cargo, and the current value is generally in the range of 4-20mA when the cargo is hoisted. The current of the travelling crane is between 0mA and 4mA when the travelling crane does not lift the goods and move or is static, the current is suddenly increased when the travelling crane lifts the goods and is kept at a larger current, for example, the upper limit value can be set to 6mA, the current can be larger than 15mA when the travelling crane lifts the goods, at the moment, the travelling crane can be accurately judged to lift the goods, the lower limit value can be set to 4mA, and the current of the travelling crane is between 0mA and 4mA when the travelling crane does not lift the goods and moves or is static, when the travelling crane puts down the goods, the current of the travelling crane is suddenly reduced, and the current of the travelling crane is smaller than the lower limit value, so that the travelling crane can be. The upper limit value and the lower limit value can be set according to specific requirements.

In addition, whether the travelling crane lifts the goods or puts the goods can be judged by other methods, for example, a weighing sensor can be arranged on the travelling crane, whether the travelling crane lifts the goods or puts the goods again can be judged by the weight born by the weighing sensor, the weight born by the weighing sensor is larger when the goods are lifted, and the weight born by the weighing sensor is suddenly reduced and can become zero when the goods are put down, so that whether the travelling crane lifts the goods or puts the goods can be accurately judged by the method. The pressure that can also receive through the lifting hook of driving judges the driving whether to hoist the goods or put down the goods, and the pressure that the lifting hook bore when hoisting the goods is great, and the pressure that the lifting hook bore when putting down the goods reduces suddenly, can become zero, also can accurately judge the driving through the pressure of lifting hook and be hoisting the goods or putting down the goods.

Optionally, the warehouse may include a cargo area and a channel area, the cargo area is an area where the warehouse is located, that is, an area where the cargo is placed, the channel area is an area where the vehicle travels, the cargo area is not placed, coordinate intervals of the cargo area and the channel area may be set in a divided manner, the state of the cargo may include cargo shipment, cargo entering, invalid operation, and cargo transfer, in step S3, the state of the cargo may be determined by determining a coordinate interval where the first position coordinate and the second position coordinate are located, and when the first position coordinate is located in the cargo area and the second position coordinate is located in the channel area, the cargo shipment is determined;

when the first position coordinate is located in the channel area and the second position coordinate is located in the goods area, judging that the goods are put in storage;

when the first position coordinate is located in the channel area and the second position coordinate is located in the channel area, judging the operation to be invalid;

and when the first position coordinate is located in the goods area and the second position coordinate is located in the goods area, judging that the goods are moved to the warehouse. The state of goods can be respectively transmitted to the server to be stored, so that the management or the delivery of subsequent goods are facilitated, the position information and the goods information of each goods are stored when the goods are put in storage, the goods can be stored in the server, when the goods are judged to be moved, the position information of the goods stored in the server can be replaced by the position information of the goods moved in the storage, and the goods can be conveniently searched in the later period.

Preferably, when the goods are determined to be warehoused in step S3, the method may further include the steps of: step S4, the position information and the cargo information of the cargo are saved. Because the goods in a storage position correspond to the position coordinates of the travelling crane when the travelling crane lifts or puts down the goods, the corresponding position information of the goods can be determined after the second position of the travelling crane is determined. The position coordinate of the goods when the goods are put down can be determined through the second position coordinate, the position of the put-down goods is judged according to the position coordinate of the goods, the position information of the goods can comprise the position of the goods and the position coordinate, and the information of the goods can comprise the name, the manufacturer, the number, the weight and the like of the goods. In addition, the position coordinates of the travelling crane do not need to be converted into the position information of the goods set in the corresponding system, and the coordinates of the second position can be directly used as the position information of the goods, so that the position of the goods is judged.

Preferably, the step S1 may further include obtaining cargo information of the lifted cargo according to the first position coordinate, where each warehouse location in each warehouse corresponds to a corresponding position coordinate, and each warehouse location stores a corresponding cargo, and the position coordinate of the cargo corresponds to the position coordinate of the warehouse location where the cargo is located, and when the crane lifts the cargo, the position coordinate of the crane corresponds to the position coordinate of the lifted cargo, and the cargo information of the lifted cargo can be obtained according to the first position coordinate of the crane; step S2 may further include obtaining a corresponding storage space according to the second position coordinates, where when the goods are put down, the position coordinates of the traveling crane correspond to the position coordinates of the put-down goods, and the storage space where the put-down goods are located may be obtained according to the position coordinates of the put-down goods.

Optionally, the monitoring method may further include the steps of:

in step S5, when it is determined in step S3 that the goods are put in storage, the corresponding storage location is stored as the storage location of the goods. In step S5, the position coordinates of the warehoused goods may be obtained according to the second position coordinates, the corresponding warehouse location may be obtained according to the position coordinates of the warehoused goods, or the warehouse location corresponding to the warehoused goods may be directly obtained according to the second position coordinates. The position coordinates or the second position coordinates of the warehoused goods and the warehouse location can be further transmitted to a system or a server to be stored, in the warehousing operation process, warehousing personnel can also scan the serial number of the goods by using scanning equipment (PDA) after the goods are put down and then acquire the position coordinates or the second position coordinates of the put-down goods to upload the position coordinates or the second position coordinates to the system, the system can automatically convert the position coordinates or the second position coordinates of the goods into the corresponding warehouse location according to the goods coordinates or the second position coordinates, and the coordinates or the second position coordinates and the warehouse location of the goods can be stored in the system. When goods are put in storage for the first time, the PDA can be adopted for putting in storage, the bales and the 3-dimensional coordinates stored in the bales are bound, and the initial positions of the bales are stored in a warehouse system, so that the goods information can be automatically identified through the driving operation positions at the later period.

In practical application, the monitoring method may further include the steps of:

in step S6, when it is determined in step S3 that the goods are moved, the storage location obtained in step S2 is used as the post-movement storage location of the goods. The corresponding storage position where the goods to be moved in the warehouse are located can be obtained according to the second position coordinate of the travelling crane, the storage position obtained according to the second position coordinate of the travelling crane is used as the storage position after the goods to be lifted in the warehouse are moved, the storage position after the goods to be moved in the warehouse can be stored, and the original storage position where the goods to be moved in the warehouse can be automatically replaced by the storage position after the goods to be moved in the server.

Optionally, the monitoring method further comprises the following steps:

and step S7, when the goods are judged to be delivered in the step S3, comparing the goods information with the information of the goods to be delivered in advance, and sending out early warning information when the goods information does not accord with the information of the goods to be delivered in advance. That is to say, some goods need special supervision, can compare the discernment and carry out the early warning suggestion in order to go out the warehouse in goods when the goods are gone out of the warehouse through setting for the goods in advance, if confirm that the goods of going out of the warehouse is special supervision goods, can send early warning information at the supervision platform, can look over the goods information of going out of the warehouse through the supervision platform to and the operation process of going out of the warehouse, can manually remove the warning. The supervision platform can check whether the goods in the warehouse system have the pledge marks or not through the method during warehouse-out operation, and can generate alarm information if the goods have the pledge marks.

Optionally, image information of the passage area and the cargo area is acquired, and the image information is stored. The system can monitor the whole warehouse and the operation process in real time, and the operation process can be reviewed at any time on the supervision platform by storing image information.

Preferably, the object entering the passage area is identified through the image information, and warning information is sent out when the object is not a truck. The object entering the channel area is identified and monitored through the image information, whether a large object enters the channel area is monitored in real time, image or video analysis is carried out, and when a vehicle which does not meet the requirement enters the channel area, alarm information can be pushed to a server.

With the development of the internet of things technology, the internet of things technology is applied to warehouse management of various industries to different degrees, and it is not difficult to track and position an object. In logistics management, if goods need to be positioned and tracked, a label capable of being positioned, tracked and identified is attached to the goods needing to be positioned and tracked in a conventional way, and tracking and identification of the goods are achieved through tracking and identification of the label. However, in the steel industry, due to the characteristics (shielding property) of the method and the stacking mode (multi-layer and dense stacking) of the warehouse, the method is difficult to achieve the effect of the method, and the problem can be solved through the monitoring method of the warehouse goods.

The method for monitoring the warehouse goods can judge the state of the goods through a first position coordinate when the travelling crane lifts the goods and a second position coordinate when the travelling crane puts down the goods, judge the travelling crane lifts the goods or puts down the goods through the current of the travelling crane, record and store the state of the goods, facilitate the subsequent management and delivery of the goods, store the position information and the goods information of the goods when the goods are put in the warehouse, acquire the goods information of the lifted goods according to the first position coordinate, acquire the warehouse position after the lifted goods are moved into the warehouse according to the second position coordinate, send early warning information when the goods information does not accord with the information of the pre-delivery warehouse when the goods are delivered from the warehouse, monitor a passage area and a goods area, send early warning information when an object entering the passage area is not a truck, facilitate the safety of the goods and the warehouse to be ensured, reduce manpower and material resources required by monitoring, and improve the monitoring efficiency, the cost is reduced.

The invention provides a monitoring device for warehouse goods, which can realize the method through the monitoring device for the warehouse goods.

As shown in fig. 2, the monitoring apparatus for warehouse goods includes:

the positioning device 10 is used for acquiring a first position coordinate when the crane lifts the goods, and the positioning device 10 is also used for acquiring a second position coordinate when the crane puts down the goods;

the positioning device 10 may also acquire the position coordinates of the traveling crane in real time, or may acquire the position coordinates of the traveling crane at intervals, where the position coordinates of the traveling crane include a coordinate in the horizontal direction and a coordinate in the height direction of a hook of the traveling crane. Can obtain the position coordinate through the range finding to driving travel distance, the common technique that can realize indoor range finding at present has: bluetooth, infrared ray, radio frequency technology, WIFI, zigBee, UWB, sweep the sign indicating number etc. wherein the precision of bluetooth, infrared ray, radio frequency technology, WIFI, zigBee is M level basically, and the precision of UWB can reach 10cm level, sweeps the precision of sign indicating number range finding and can reach the millimeter level. The embodiment can be selected according to actual requirements, for example, the cost of code scanning ranging is higher than that of UWB, and meanwhile, considering that the size of the steel coil is calculated by meters, the embodiment can select to adopt UWB equipment technology.

The driving can include the cart, dolly and lifting hook, the dolly is established on the cart, the dolly can move on the cart, the lifting hook can move on the dolly, positioner 10 can include UWB equipment and rotation sensor, can be through installing UWB equipment on the driving, utilize UWB equipment to the cart of driving, the dolly carries out real-time ranging, can survey 10 times per second, gather horizontal (X) and vertical (Y) displacement distance on the driving level in real time, and convey the distance of testing each time to PLC equipment in real time, record time of receipt and distance in PLC, confirm the operation position coordinate of driving on the horizontal direction, can push away position coordinate to the server through DTU, can push away 5 position coordinate data per second, store data in the server. Can install rotation sensor on the dolly roller bearing of driving a vehicle, measure lifting hook decline and rising distance (Z) according to the rotation number of turns of rotation sensor, confirm the driving a vehicle in direction of height (Z) axle operation position, can pass through thing networking module propelling movement to server and store in the server.

The processing device 20, the processing device 20 may be configured to determine a state of the cargo according to the first position coordinate and the second position coordinate, divide the warehouse into the cargo area and the channel area, set a coordinate area of the cargo area and a coordinate area of the channel area, set a coordinate boundary of the cargo area and the channel area, set a boundary of each warehouse location, determine a state of the cargo by determining that the first position coordinate and the second position coordinate are in the coordinate area of the cargo area or the coordinate area of the channel area, for example, the cargo is delivered, the cargo is moved to the warehouse, and the state of the cargo is recorded, and the state of the cargo may be stored.

According to some embodiments of the invention, the monitoring device may further comprise:

the current sensor 30, the current sensor 30 is used for obtaining the current of driving a vehicle, and the current sensor 30 can transmit the direct current signal of driving a vehicle to the PLC equipment in real time to monitor the current change situation in real time through the PLC equipment.

The processing device 20 comprises a first comparator 21, the first comparator 21 can be connected with the current sensor 30, the first comparator 21 compares the current with a threshold range, when the current is larger than the upper limit value of the threshold range, the first comparator 21 sends out a judgment signal for lifting the goods, and when the current is smaller than the lower limit value of the threshold range, the first comparator 21 sends out a judgment signal for lowering the goods. For example, the threshold range of the current can be set to 4mA-6mA, the current of the traveling crane is 0mA-25A when the traveling crane does not lift the goods and moves or is still, when the traveling crane puts down the goods, the current of the traveling crane is suddenly reduced, the current of the traveling crane is smaller than the lower limit value of the threshold range, and the first comparator 21 sends out a judgment signal for putting down the goods; the current suddenly becomes large when the travelling crane lifts the goods and is kept at a larger current, the current can be larger than 15mA when the travelling crane lifts the goods, the current is larger than the upper limit value of the threshold range, the first comparator 21 sends out a judgment signal for lifting the goods, and the travelling crane can be accurately judged to lift or put down the goods. Wherein the current threshold range can be set according to actual requirements. In addition, monitoring device can also include weighing sensor, and weighing sensor can establish on the driving a vehicle, judges through the weight that weighing sensor bore the driving a vehicle and is lifting by crane the goods or put down the goods again, and the weight that weighing sensor bore when lifting by crane the goods is great, and the weight that weighing sensor bore reduces suddenly when putting down the goods can become zero, can accurately judge the driving a vehicle and be lifting by crane the goods or putting down the goods. The output signal of the weighing sensor changes along with the different bearing weights, the output signal of the travelling crane weighing sensor can be conditioned through the transmitter, for example, the output signal conditioned by the transmitter can be a 4-20mA current signal, and the current signal is converted into a digital signal through an acquisition interface of the Internet of things module and then is pushed to the server.

According to other embodiments of the present invention, the warehouse may include a cargo area and a passage area, the state of the cargo may include cargo unloading, cargo loading, invalid operation and cargo transferring, the processing device 20 may further include a second comparator 22, the first comparator 21 and the second comparator 22 may be integrated together or may be separately configured, and the second comparator 22 is configured to compare the first position coordinate and the second position coordinate with the area of the warehouse, respectively.

When the first position coordinate is located in the cargo area and the second position coordinate is located in the passage area, the second comparator 22 sends a judgment signal for cargo delivery;

when the first position coordinate is located in the passage area and the second position coordinate is located in the cargo area, the second comparator 22 sends a judgment signal for cargo warehousing;

when the first position coordinate is located in the channel region and the second position coordinate is located in the channel region, the second comparator 22 sends out a judgment signal of invalid operation;

when the first position coordinate is located in the cargo area and the second position coordinate is located in the cargo area, the second comparator 22 sends out a judgment signal for cargo transfer.

The monitoring device can further comprise a display device, the display device receives a judgment signal of goods delivery and displays goods delivery, the display device receives a judgment signal of invalid operation and displays invalid operation, and the display device receives a judgment signal of goods moving and displays goods moving. The monitoring device can further comprise a prompter, the prompter receives a judgment signal of goods delivery to prompt the goods delivery, the prompter receives a judgment signal of invalid operation to prompt the goods delivery, and the prompter receives a judgment signal of goods delivery to prompt the goods delivery to move.

In some embodiments, the monitoring device may further include:

and the storage device 40 is used for storing the position information and the cargo information of the cargo when the cargo is put in storage. The position information may include position coordinates of the goods and a location of the goods, and the goods information may include a number, a name, a weight, and the like of the goods. The storage device 40 may store the state of the goods, and may include, for example, goods out of the warehouse, goods in the warehouse, invalid work, and goods moving to the warehouse.

In other embodiments, the processing device 20 is further configured to obtain cargo information for the cargo from the storage device 40 based on the first position coordinates, and the processing device 20 is configured to obtain the corresponding storage location from the storage device 40 based on the second position coordinates.

According to some embodiments of the present invention, the storage device 40 further stores a post-transfer storage location, which is a storage location corresponding to the second location coordinate when the goods are transferred.

According to further embodiments of the present invention, the monitoring device further comprises:

and the early warning device 50 is used for comparing the cargo information with the information of leaving the warehouse in advance when the cargo leaves the warehouse, and the early warning device 50 sends out early warning information when the cargo information does not accord with the information of leaving the warehouse in advance.

In some embodiments, the storage device 40 further stores a warehousing location of the goods, where the warehousing location is a corresponding location when the goods are warehoused.

and a camera 60 for acquiring image information of the passage area and the cargo area, where the image information includes picture information and video information, and storing the image information in the storage device 40.

According to further embodiments of the present invention, the monitoring device may further comprise:

and the image recognition device 70 is used for recognizing the object entering the passage area according to the image information shot by the camera 60 and triggering the early warning device 50 to send out early warning when the object is not a truck.

When the monitoring device is used, the device can be monitored in real time aiming at UWB equipment, a rotary sensor, a weighing sensor, a camera and the like, and when the equipment stops working or data is abnormal, error information is reported on a supervision platform in time so that an operator can know the running condition of the equipment at any time.

The monitoring device for warehouse goods according to the present invention corresponds to the monitoring method for warehouse goods in the above embodiments, and the detailed description of the monitoring device for warehouse goods according to the present invention may refer to the monitoring method for warehouse goods, which is not described herein again.

In the application process of the warehouse goods monitoring method and the device, reasonable improvement can be carried out according to actual needs, and the specific implementation process is different. As shown in fig. 3, during the use process, the device may include a plurality of parts, such as a data collection and positioning system and a warehouse management system, the positioning system may perform positioning according to the collected position coordinate data, and the warehouse management system may obtain corresponding warehouse location and goods information according to the position coordinate data of the traveling crane and the goods. During data acquisition, real-time data of crane hoisting can be acquired, crane hoisting goods signals can be monitored in real time, whether the crane hoists or puts down the goods can be judged, cart ranging, trolley ranging and hook ranging of the crane can be carried out, real-time ranging can be carried out, position coordinate data of the crane can be acquired, coordinate information of time points of crane hoisting and putting down the goods can be acquired, the position where the goods are hoisted and dropped can be judged, if the goods are dropped in a channel hoisting goods area, crane coordinates when the goods are dropped can be acquired through a PDA, information and coordinates of the goods can be uploaded, and the warehouse location can be analyzed and warehoused through a system; if the goods area is lifted and falls, analyzing and acquiring corresponding storage positions when the goods are lifted and fall according to the first position coordinate information and the second position coordinate information, judging the goods information, analyzing and acquiring a new storage position according to the position coordinate information when the goods fall, and then replacing the new storage position in the system; if the goods delivery device is hoisted in a goods area and put down in a channel, the position coordinates of the goods are obtained according to the driving coordinates when the goods are hoisted and put down, then the corresponding storage positions and goods information are obtained through analysis, the goods information can be compared with the information of the goods to be delivered in advance, whether the goods can be delivered out of the storage normally or not is judged, early warning can be sent out when the goods cannot be delivered out of the storage normally, and information can be sent out to a goods owner or a manager.

In the application process, as shown in fig. 4, the device can include a distance measuring module, a PLC control system, a tracking management system and a warehouse management system, the distance measuring module can include a driving cart distance measuring module, a driving hook distance measuring module and a communication module, and can also include a driving current signal output module for transmitting a driving current signal, the distance measuring module can be integrated in the positioning device, the data obtained by the driving distance measuring module can be transmitted to the PLC control system in the PLC device through the communication module, the PLC control system can include a data receiving module, a driving crane lifting and dropping behavior monitoring module and a communication module, the data receiving module transmits the received data information to the driving crane lifting and dropping behavior monitoring module, the PLC control system can generate lifting and dropping time point driving coordinate information and transmit the coordinate information to the tracking management system through the communication module, the tracking management system can comprise a data receiving module, a behavior analysis module and a communication module, the data receiving module receives the driving coordinate information and then performs driving behavior analysis through the behavior analysis module, the analyzed driving behavior analysis result is transmitted to the warehouse management system through the communication module, the warehouse management system analyzes the state of the goods according to the driving behavior, the state of the goods is stored, warehousing, moving and ex-warehouse management can be performed according to the state of the goods, and subsequent ex-warehouse and goods management is facilitated. Other implementation modes can be selected according to actual needs in the implementation process of the method and the device, and reasonable improvement is carried out.

According to the warehouse goods monitoring device, the state of the goods can be judged through the first position coordinate when the travelling crane lifts the goods and the second position coordinate when the travelling crane puts the goods down, the travelling crane can be used for judging the goods lifted by the travelling crane or puts the goods down, the state of the goods can be recorded and stored, the subsequent management and delivery of the goods are convenient, the position information and the goods information of the goods can be stored when the goods are put in storage, the goods information of the lifted goods can be obtained according to the first position coordinate, the storage position after the lifting of the goods is moved in the storage is obtained according to the second position coordinate, early warning information can be sent out when the goods information does not accord with the information of the pre-delivery when the goods are delivered out of the storage, the passage area and the goods area can be monitored, the early warning information can be sent out when an object entering the passage area is a non-truck, the safety of the goods and the warehouse is, the supervision efficiency is improved, and the cost is reduced.

In addition, embodiments of the present invention further provide a method for determining a weight of a cargo, and the steps of the method for determining a weight of a cargo are described in detail below with reference to fig. 5.

As shown in fig. 5, the method for determining the weight of the cargo according to the embodiment of the present invention includes:

step A1, acquiring the corresponding full load weight when the travelling crane lifting appliance is full, wherein the specific type of the travelling crane lifting appliance is not limited, and the travelling crane lifting appliance can lift cargoes, such as a lifting hook.

That is to say, the load range of the crane sling is firstly determined, and the estimated weight of the goods exceeding the full load of the crane is changed into a large crane for weighing, so as to prevent the crane from being damaged due to overweight goods.

And A2, acquiring an idle load current signal and a full load current signal corresponding to the traveling crane spreader in idle load and full load states respectively.

In the process of weighing the weight of the goods, in order to prevent the self weight of the travelling crane lifting appliance from influencing the weight measurement of the goods to be measured and generating errors, the zero calibration is carried out when the lifting appliance is unloaded so as to remove the weight influence of the lifting appliance.

And A3, acquiring a corresponding cargo current signal of the cargo to be detected in a state that the cargo is lifted by the crane spreader.

It should be noted that, during the process of hoisting the cargo to be measured, the measurement result may be changed at first due to shaking or instability during the hoisting process, and thus it is necessary to wait until the measurement result is basically unchanged or the change range is small, and then obtain the corresponding cargo current signal to reduce the measurement error.

And step A4, determining the weight of the goods to be detected according to a preset algorithm.

The preset algorithm is as follows: the weight of the goods to be detected is the full load weight (goods current value-no-load current value)/(full load current value-no-load current value), and the goods current signal value, the no-load current signal value and the full load current signal value in the formula are respectively corresponding numerical values of the goods current signal, the no-load current signal and the full load current signal. The no-load current value, the full-load current value and the full-load weight are preset in a program or an algorithm, the corresponding weight of the goods to be measured can be obtained only by knowing the current value of the goods in each measurement, the calculation efficiency is high, and the method is simple and convenient.

The no-load current signal, the full-load current signal and the cargo current signal in the above steps are all converted from the resistance signal output by the sensor, and the resistance signal output by the sensor can be converted into the current signal by using a conversion device such as a weighing limiter.

The preset algorithm is further illustrated here by way of example: for example, the current signal output is 4mA when the hook is empty and 20mA when the hook is full. Assuming that the set full load weight is W, the unit is ton. When the goods are lifted, the current signal suddenly becomes large, the lifting hook stops shaking, after the goods are stabilized, the current signal keeps unchanged, and the current signal value at the moment is recorded as a and the unit mA. The weight of the goods is in direct proportion to the magnitude of the current signal, and the current signal value a can be converted into the weight of the current goods according to the equal proportion, namely

In some embodiments of the present invention, step a3 may specifically include:

and A31, acquiring a current signal corresponding to the goods to be detected in the process of being lifted by the crane spreader in real time.

Step a32, the change value of the current signal is monitored and determined.

In the process of hoisting the goods to be tested, the tension of the lifting appliance is constantly changed, so that the corresponding current signals are also changed, and in order to obtain stable current signals, the changed current signals need to be monitored in real time, and the change values of the current signals are judged.

That is, when the variation value of the current signal is lower than the predetermined threshold, it may be considered that the current signal has already tended to be stable, and further, when the variation value of the current signal within a certain time interval is lower than the predetermined threshold, it may be considered that the current signal has tended to be stable, for example, if it is assumed that the predetermined threshold is 0.1mA and the time interval is 5s, when the variation value of the current signal within 5s is lower than 0.1mA, the current signal at that time is acquired and stored as the cargo current signal; on the contrary, if the current change value of the current signal in 5s is higher than 0.1mA, the current signal at the moment is not stored, the current signal is continuously monitored to judge the change value of the current until the change value of the current signal meets the condition, and the current signal is stored.

In other embodiments of the present invention, step a3, further comprises:

and step A34, determining the state of the goods to be measured according to the current value change of the current signal at the initial moment. The initial moment is the moment when the change value of the current signal reaches a preset value; at the initial moment, if the current value is increased, determining that the goods to be detected are hoisted; and at the initial moment, if the current value is reduced, determining that the goods to be measured are put down.

That is to say, the cargo is initially static or lifted, when the spreader is used for the next action on the cargo, due to the change of stress, the current signal corresponding to the cargo is also changed, but the current signal is changed except the lifting or lowering process, the cargo is inevitably shaken in the process that the cargo is lifted, so that the current signal is also changed, and the influence is eliminated, so that a preset value is set, and the moment when the change value of the current signal corresponding to the cargo reaches the preset value is defined as the initial moment. Moreover, when the goods are lifted and put down, the force applied to the sensor is different, and the corresponding current signals are different, so that whether the goods are lifted or put down can be judged according to the change value of the current signal at the initial moment, and if the current value at the initial moment is increased, the goods to be detected are determined to be lifted; and if the current value at the initial moment is reduced, determining that the goods to be tested are put down.

According to the method for determining the weight of the goods, the corresponding no-load current signal and full-load current signal and the corresponding full-load weight of the travelling crane and the lifting appliance in the no-load state and the full-load state respectively are obtained; acquiring a corresponding cargo current signal when a cargo to be detected is hoisted by a crane hoist; and determining the weight of the goods to be measured according to a preset algorithm. By the method, the weight of the goods can be observed more visually and conveniently, and the weighing scale is not additionally arranged on the lifting appliance in the weighing process, so that the height of the travelling operation is not influenced, the placement of goods in a warehouse is facilitated, and the management of the warehouse is facilitated.

An apparatus for determining the weight of a load according to an embodiment of the present invention will be described with reference to fig. 6.

As shown in fig. 6, the apparatus for determining the cargo according to the embodiment of the present invention includes:

the first acquiring unit 101 is used for acquiring the corresponding full load weight when the travelling crane lifting appliance is full;

a second obtaining unit 102, configured to obtain an empty load current signal and a full load current signal corresponding to a lifting appliance in an empty load state and a full load state, respectively;

the third acquiring unit 103 is configured to acquire a cargo current signal corresponding to a cargo to be detected in a state that the cargo is lifted by a crane spreader;

and the calculating unit 104 is used for determining the weight of the goods to be measured according to a preset algorithm.

Wherein, the preset algorithm is as follows: the weight of the goods to be detected is the full load weight (goods current value-no-load current value)/(full load current value-no-load current value), wherein the goods current signal value, the no-load current signal value and the full load current signal value are respectively the values corresponding to the goods current signal, the no-load current signal and the full load current signal.

In further embodiments of the present invention, the apparatus for determining the weight of the cargo further comprises:

the sensor 105 is used for respectively outputting corresponding resistance signals when the travelling crane is in a state of no load, full load and hoisting of goods to be detected;

and a conversion unit 106 for converting the resistance signal output by the sensor into a current signal.

According to some embodiments of the present invention, as shown in fig. 7, the third obtaining unit 103 may further specifically include:

the signal collector 1031 is used for acquiring a current signal corresponding to the goods to be detected in real time in the process of being lifted by the crane spreader;

a monitor 1032 for monitoring and determining a change value of the current signal;

and a comparator 1033 for comparing the variation value of the current signal with a predetermined threshold value, and acquiring and storing the current signal at the moment as the cargo current signal when the variation value of the current signal is lower than the predetermined threshold value.

In other embodiments of the present invention, the third obtaining unit 103 may further include:

the determiner 1034 is configured to determine the state of the cargo to be tested according to a current value change of the current signal at an initial time, where the initial time is a time when the change value of the current signal reaches a preset value; wherein the content of the first and second substances,

In the application process, the first obtaining unit may be a weigher, the second obtaining unit may be a current instrument panel, the third obtaining unit and the calculating unit may be PLC devices, the converting unit may be a weighing limiter, and the sensor may be a pressure sensor. Specifically, the method comprises the following steps: the pressure sensor is installed on the travelling crane and used for converting measured weight into resistance and outputting the resistance to the weighing display, the weighing limiter converts received resistance wire number into a current signal and outputs a value current instrument panel and PLC equipment, and the current instrument panel is used for receiving no-load current signals and full-load current signals and displaying specific current values of the no-load current signals and the full-load current signals. The PLC equipment receives current signals corresponding to the goods in real time and monitors the current change condition in real time, whether the goods are lifted or put down can be obtained through the instantaneous change of the current, and if the current is increased at the initial moment, the goods are lifted; if the current is reduced at the initial moment, the cargo is put down. And after the crane lifting appliance stops shaking and the goods are stable, the current signal is kept unchanged, and the PLC equipment records the current signal value at the moment. Meanwhile, a preset algorithm may be preset in the PLC device, and the PLC device derives and displays the weight of the goods according to the current signal value of the goods and the preset algorithm.

According to the device, the weight of the goods to be measured can be obtained by acquiring the goods current signal corresponding to the goods, the weighing process is convenient, the operation height of a travelling crane is not limited, and the stacking of the goods in a warehouse is facilitated.

A warehouse management method according to an embodiment of the present invention is described below with reference to fig. 8.

As shown in fig. 8, the warehouse management method according to the embodiment of the present invention includes:

(a) the weight of the goods to be measured is obtained by the method for determining the weight of the goods provided by the embodiment of the invention.

(b) And establishing an inventory database, wherein the standard weight and the position information of the goods are stored in the inventory database.

(c) And comparing and matching the weight of the goods to be detected with all standard weights in the inventory database.

(d) Acquiring corresponding position information of goods to be detected in an inventory database; the method specifically comprises the following steps:

(d-1) when the difference value between the weight of the goods to be measured and a standard weight in the inventory database is smaller than a preset value, acquiring the position information corresponding to the standard weight stored in the inventory database;

and (d-2) when the difference value between the weight of the goods to be detected and each standard weight is larger than a preset value, setting a group of position information for the weight of the goods to be detected as the position of the goods to be detected in the warehouse, and storing the weight of the goods to be detected and the corresponding position information thereof into an inventory database.

(e) And carrying out warehousing management on the goods to be detected based on the position information.

In further embodiments of the present invention, the warehouse management method further comprises:

(f) comparing and matching the weight of the goods to be delivered with all standard weights in the inventory database;

(g) and carrying out ex-warehouse management on goods to be ex-warehouse based on the position information.

According to the warehouse management method, the corresponding relation between the weight of the goods and the position of the warehouse is established, the goods with different weight ranges are placed in different partitions, the corresponding relation between the weight and the position is stored in the warehouse database, when the goods are delivered to the warehouse, the goods can be positioned in the warehouse only according to the gross weight of the goods, the delivery time is saved, and the delivery and warehousing management of the goods in the warehouse are facilitated.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method of determining the weight of a cargo comprising the steps of:

step A1, acquiring corresponding full load weight when the travelling crane lifting appliance is full;

step A2, acquiring a no-load current signal and a full-load current signal corresponding to the travelling crane spreader in no-load and full-load states respectively;

a3, acquiring a corresponding cargo current signal of a cargo to be detected in a state that the cargo is lifted by the crane spreader;

the preset algorithm is as follows: the weight of the goods to be detected is the full load weight (goods current signal value-no-load current signal value)/(full load current signal value-no-load current signal value), wherein the goods current signal value, the no-load current signal value and the full load current signal value are respectively the values corresponding to the goods current signal, the no-load current signal and the full load current signal.

2. The method of claim 1 wherein said no-load current signal, said full-load current signal, and said cargo current signal are each converted from a resistance signal output by a sensor.

3. The method according to claim 1, wherein the step a3 specifically comprises:

step A31, acquiring a current signal corresponding to the goods to be detected in the process of being lifted by the travelling crane lifting appliance in real time;

step A32, monitoring and determining the change value of the current signal;

and step A33, when the change value of the current signal is lower than a preset threshold value, acquiring and storing the current signal at the moment as the cargo current signal.

4. The method of claim 3, wherein said step A3 further comprises:

step A34, determining the state of the goods to be detected according to the current value change of the current signal at the initial time, wherein the initial time is the time when the change value of the current signal reaches a preset value; wherein the content of the first and second substances,

and at the initial moment, if the current value is reduced, determining that the goods to be detected are put down.

5. An apparatus for determining the weight of cargo, comprising:

the third acquisition unit is used for acquiring a cargo current signal corresponding to the cargo to be detected in a state that the cargo to be detected is lifted by the travelling crane lifting appliance;

6. The apparatus of claim 5, further comprising:

the sensors are used for respectively outputting corresponding resistance signals when the travelling crane lifting appliance is in a no-load state, a full-load state and a state of lifting the goods to be detected;

7. The apparatus of claim 5, wherein the third obtaining unit specifically comprises:

the signal collector is used for acquiring a current signal corresponding to the goods to be detected in the process of being lifted by the crane lifting appliance in real time;

a monitor for monitoring and determining a change value of the current signal;

and the comparator is used for comparing the change value of the current signal with a preset threshold value, and acquiring and storing the current signal at the moment as the cargo current signal when the change value of the current signal is lower than the preset threshold value.

8. The apparatus of claim 7, wherein the third obtaining unit further comprises:

9. A warehouse management method, comprising:

the method for determining the weight of a load according to any of claims 1-4 is used to obtain the weight of the load to be measured.

10. The method of claim 9, further comprising:

comparing and matching the weight of the goods to be detected with all standard weights in the inventory database;

acquiring corresponding position information of the goods to be detected in the inventory database;

11. The method according to claim 10, wherein the obtaining of the corresponding location information of the goods to be tested in the inventory database specifically includes:

when the difference value between the weight of the goods to be detected and a certain standard weight in the inventory database is smaller than a preset value, acquiring position information corresponding to the standard weight and stored in the inventory database;

12. The method of claim 10, further comprising:

acquiring corresponding position information of the goods to be delivered in the inventory database;

and carrying out warehouse-out management on the goods to be warehoused based on the position information.