CN114295055B - Device and method for measuring object volume - Google Patents
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Abstract
The application discloses a device for measuring the volume of an object, which comprises a channel structure, and at least two signal transmitters and at least two signal receivers which are arranged on the inner wall of the channel structure, wherein the at least two signal transmitters and the at least two signal receivers are positioned on the same plane; a signal transmitter corresponding to the at least one signal receiver, a signal receiver corresponding to the at least one signal transmitter; the device also comprises a processor connected with the signal receiver, wherein the processor is used for acquiring an occlusion signal fed back by the signal receiver at a preset sampling frequency; in a sampling period, determining the sampling sectional area of a target object in the channel structure in the sampling period according to the shielding signal; and carrying out volume integration on the sampling sectional area according to a preset speed value to obtain the volume of the target object. The application also correspondingly discloses a method for measuring the volume of the object, and the device and the method have lower cost and higher efficiency.
Description
Technical Field
The application relates to the technical field of sensors, in particular to a device and a method for measuring the volume of an object.
Background
In the prior art, there is a need in many industries to measure the volume of goods or merchandise. For example, in the field of unattended intelligent containers, it is necessary to measure volume information of a commodity taken by a consumer, and then the volume information is used for assisting in judging the type and price of the commodity. For example, in the courier industry, it is desirable to measure the volume and weight of packages to price shipping costs. Generally, measuring the volume of an object requires a metrology device to obtain three-dimensional information of the object, but many of the above scenarios do not have such a condition.
Some existing methods of aiding in measuring volume:
1. And capturing appearance information of the target object in the video picture by using a plurality of cameras through an AI program, and comparing and estimating the volume of the target object. This method requires high cost to achieve a certain accuracy, and is therefore costly and inefficient.
2. And (3) using a TOF (Time of flight) type sensing camera to directly capture the volume characteristic calculation of the commodity. This method needs a certain distance space between the TOF sensor and the target object to realize, and it is difficult to accurately measure the measurement information of the moving target object. Therefore, the cost is high and the accuracy is low.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a low-cost and high-efficiency device for measuring objects.
A device for measuring the volume of an object, comprising a channel structure, and at least two signal transmitters and at least two signal receivers arranged on the inner wall of the channel structure, wherein the at least two signal transmitters and the at least two signal receivers are positioned on the same plane; the signal transmitter corresponds to at least one signal receiver, and the signal receiver corresponds to at least one signal transmitter.
The device also comprises a processor connected with the signal receiver, wherein the processor is used for acquiring an occlusion signal fed back by the signal receiver at a preset sampling frequency; in a sampling period, determining the sampling sectional area of a target object in the channel structure in the sampling period according to the shielding signal; and carrying out volume integration on the sampling sectional area according to a preset speed value to obtain the volume of the target object.
In one embodiment, the signal emitters or the signal receivers are unevenly arranged on the inner wall of the channel structure.
In one embodiment, the signal transmitters and the signal receivers are staggered on the inner wall of the channel structure.
In one embodiment, the signal transmitter is one of a laser sensor, an infrared sensor, an acoustic sensor, or an ultrasonic sensor.
In one embodiment, the access port structure is a pass-through door on a chest gate of an express chest, a chest gate of an unmanned retail chest, or a logistics conveyor.
In addition, in order to overcome the problems in the prior art, the invention also provides a low-cost and high-efficiency method for measuring the object based on the device for measuring the object.
A method of measuring a volume of an object, the method comprising:
Acquiring shielding signals fed back by a signal receiver arranged on the inner wall of the channel structure at a preset sampling frequency;
in a sampling period, determining the sampling sectional area of the target object in the sampling period according to the shielding signal;
And carrying out volume integration on the sampling sectional area according to a preset speed value to obtain the volume of the target object.
In one embodiment, the determining the sampling cross-sectional area of the target object in the sampling period according to the occlusion signal further includes:
acquiring identification information of a signal receiver corresponding to the shielding signal;
Acquiring a corresponding receiver position according to the identification information;
And calculating the sampling sectional area of the target object according to the receiver position.
In one embodiment, the determining the sampling cross-sectional area of the target object in the sampling period according to the occlusion signal further includes:
acquiring identification information of a signal receiver corresponding to the shielding signal;
Acquiring a mapping relation between preset identification information and sampling sectional areas;
And inquiring and acquiring the corresponding sampling sectional area in the mapping relation according to the identification information.
In one embodiment, the method further comprises:
controlling one or more signal transmitters to sequentially transmit signals at intervals in a sampling period;
in a sampling period, acquiring a signal receiving state fed back by a signal receiver, wherein the signal receiving state comprises identification information of the signal receiver and identification information of a signal transmitter of a signal source received by the signal receiver;
And determining critical signal receivers of all the signal transmitters according to the signal receiving states, and obtaining sampling sectional areas according to the positions or the identification information of the signal transmitters and the corresponding critical signal receivers.
In one embodiment, the method further comprises:
controlling one or more signal transmitters to sequentially transmit signals at intervals in a sampling period;
acquiring a shielding signal fed back by a time sequence of a signal receiver in a sampling period;
and obtaining the identification information of the signal receiver with the time sequence information in a sampling period according to the time sequence of the acquired shielding signal.
After the device and the method for measuring the volume of the object are adopted, the object to be measured only passes through the channel structure of the device, and at a certain sampling time in the passing process, signals sent by signal transmitters on the same plane on the channel structure are shielded, so that signal receivers at corresponding positions can not receive the signals and the shielding signals can be fed back to the processor. The processor can determine the sampling sectional area of the object to be detected on the plane of the signal receiver at the sampling moment according to the position of the signal receiver corresponding to the shielding signal, and then integrates the sampling sectional area, the passing speed and the passing time at each sampling moment to obtain the volume of the object. Compared with the prior art, the method only needs a plurality of low-cost signal transmitters and signal receivers, can be installed on any channel structure such as a express cabinet gate, a pass gate on a conveyor belt and the like, and has the advantages of greatly reduced cost, simple integral method for calculating the volume according to the sampling sectional area, small calculated amount and higher execution efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a schematic view of an apparatus for measuring the volume of an object according to an embodiment of the present invention;
FIG. 2 is a schematic view of an apparatus for measuring the volume of an object according to another embodiment of the present invention;
FIG. 3 is a schematic diagram showing a process of calculating a sampling cross-sectional area according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of calculating the volume of an object according to the integral of the sampling cross-sectional area in an embodiment of the present invention;
FIG. 5 is a schematic diagram of calculating volume according to a gear of sampling sectional area in an embodiment of the invention;
FIG. 6 is a schematic diagram of calculating volume according to a sampling cross-sectional area shift in an embodiment of the present invention;
FIG. 7 is a schematic diagram of calculating volume according to a sampling cross-sectional area shift in an embodiment of the present invention;
FIG. 8 is a schematic diagram of calculating a sampling cross-sectional area for a signal transmitter and a signal receiver in a one-to-many relationship in an embodiment of the present invention;
FIG. 9 is a schematic diagram of calculating a sampling cross-sectional area for a signal transmitter and a signal receiver in a many-to-many relationship in an embodiment of the present invention;
FIG. 10 is a schematic diagram of a staggered arrangement of signal transmitters and signal receivers according to an embodiment of the invention;
FIG. 11 is a flow chart of a method of measuring an object in an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to fall within the scope of the present application.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present application, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.
In order to be able to measure the volume of an object at low cost and with high efficiency, the invention proposes a device for measuring the volume of an object. Specifically, in one embodiment, referring to fig. 1, the apparatus for measuring the volume of an object includes a channel structure 10, and at least two signal transmitters 20 and at least two signal receivers 30 disposed on an inner wall of the channel structure 10, the at least two signal transmitters 20 and the at least two signal receivers 30 being located on the same plane. A signal transmitter 20 corresponds to at least one signal receiver 30, and a signal receiver 30 corresponds to at least one signal transmitter 20.
In fig. 1, taking a square storage grid of the express cabinet as an example, when a user places a package into the square storage grid, the package enters the interior of the bin Chu Ge through the grid opening of the bin Chu Ge, and the upper wall, the lower wall and two side walls of the storage grid form a channel structure 10 for the package to enter the storage grid. On the inner wall of the cell opening of the channel structure 10 of the storage cell, a plurality of signal transmitters 20 are provided, and a plurality of signal receivers 30 are provided, such as a plurality of signal transmitters 20 including 201, 202, 203 … and the like on the inner wall of the cell opening in fig. 1, and a plurality of signal receivers 30 including 301, 302, 303 and … and the like. The signal transmitter and the signal receiver are arranged on the inner wall of the grid, so that the signal transmitter and the signal receiver are positioned on the same plane.
In the embodiment shown in fig. 1, the signal emitted by the signal emitter 20 (including 201, 202, 203, …, etc.) is a collimated beam signal, and only the signal receiver facing it can receive the signal emitted by the signal emitter. For example, when the signal transmitter 201 transmits a collimated laser signal, the signal receiver 301 can only receive the collimated laser signal when the signal transmitter 201 does not shade, and when an object is located between the signal transmitter 201 and the signal receiver 301, the signal receiver 301 can not receive the collimated laser signal, and the shaded signal on the receiving path can be fed back.
In another embodiment, as shown in fig. 2, the signal emitters or signal receivers may be non-uniformly arranged on the inner wall of the channel structure. This is because in practical application scenarios, the object that is traversing is always traversing in a relatively fixed area when traversing the channel structure, and the measurement of the volume only needs to be improved in accuracy over a certain interval, so that the number of signal receivers and signal transmitters can be saved, thereby saving costs.
In this embodiment, as shown in fig. 1, the apparatus further includes a processor 40 connected to the signal receiver 30, where the processor 40 is configured to acquire an occlusion signal fed back by the signal receiver at a preset sampling frequency; in a sampling period, determining the sampling sectional area of a target object in the channel structure in the sampling period according to the shielding signal; and carrying out volume integration on the sampling sectional area according to a preset speed value to obtain the volume of the target object.
Taking the foregoing express cabinet lattice port as an example of a channel structure, when a user places a package into the bin Chu Geshi of the express cabinet, the package will pass through the plane of the bin Chu Gege port, that is, the plane where each signal emitter and each signal receiver are located, then the signal emitted by the signal emitter will be blocked, so that the signal receiver feeds back the blocking signal. The processor collects the shielding signals at each sampling time according to a preset sampling period, and the signal receiver feeds back the shielding signals.
In a sampling period, at the sampling time t 1, as shown in fig. 3, the cross-sectional area of the target object (package) on the plane of the grid is S 1 in the process of passing through the plane of the grid. At this time, the target object blocks the signals emitted from the signal emitters 202, 203, etc., and does not block the signals generated from the other signal emitters, so that only the signal receivers 302, 303, 309, and 310 cannot receive the signals, and thus, the signal receivers 302, 303, 309, and 310 will feed back the blocked signals to the processor 40. And the shielding signal fed back by each signal receiver corresponds to the identification information of the signal receiver, and the processor can know that the signal receivers 302, 303, 309 and 310 are shielded after receiving the shielding signal. And since the positions of the signal receivers 302, 303, 309 and 310 are preset, the distance between 302 and 303 (the distance between signal receivers 301 and 304 adjacent to the non-feedback occlusion signal may also be selected), and the distance between 309 and 310 are also determined. The processor 40 can calculate the sampling cross-sectional area S 1 of the target object at the sampling time t 1 by simple multiplication.
Referring to fig. 4 again, when the target object passes through the channel structure of the lattice, the sampling period of Δt is sampled multiple times, that is, the sampling sectional area S 1,S2,S3 … collected in the above manner is obtained at time t 1,t2,t3 …, and then the integration is performed at the preset target object passing speed V n, so as to obtain the volume V of the target object:
V＝∑Sn*vn*Δt
It should be noted that the volume of the target object calculated in this way is not an accurate volume value, because the measurement of S 1 is estimated by the intersection area of the signal receiver receiving lines, and there is an error due to the existence of a gap between the signal receivers. However, in the above application scenario, the volume value of the target object does not need to be measured particularly accurately, but only the gear to which the volume of the target object belongs, or the interval range is required. Still take the storage check of express delivery cabinet as an example, the collection of express delivery cabinet to the commodity circulation expense of depositing the parcel is divided into three grades according to the volume, then in fact the volume of parcel of express delivery cabinet storehouse Chu Gege mouth the device of the invention only need to survey the volume of depositing the parcel and belongs to which grade in three grades in big, middle and little can price the commodity circulation expense of parcel, and need not survey the actual volume size of parcel.
In another embodiment, in order to improve the execution efficiency, the above embodiment may be optimized, taking fig. 5, 6 and 7 as examples, the steps of the sampling sectional area may be divided into three steps of "large, medium and small", the corresponding area values are 50, 20 and 10, respectively, and the sampling sectional area of the step is defined as "small" when receiving less than 4 shielding signals, the sampling sectional area of the step is "medium" when receiving 4 to 6 shielding signals, and the sampling sectional area of the step is "large" when receiving more than 6 shielding signals.
The processor may construct the blocking signal fed back by the signal receiver 301-310 as a binary 10-bit indicator, where each bit sequentially corresponds to the signal receiver 301-310, and when the bit is 1, it indicates that the signal receiver corresponding to the bit does not feed back the blocking signal; when the bit is 0, the signal receiver corresponding to the bit is indicated to feed back the shielding signal. For example, indicator code 1110000011 indicates that signal receivers 301, 302, 303, 309, and 310 are not feeding back an occlusion signal (i.e., are not occluded), while signal receivers 304, 305, 306, 307, and 308 are feeding back an occlusion signal (i.e., are occluded).
In this embodiment, the processor only needs to count the number of consecutive 0 bits in the indicator code and then inquire the sampling sectional area gear corresponding to the number of 0 bits to calculate the volume. And the sampling sectional area gear corresponding to the indication code can be directly inquired according to the indication code.
That is, the processor may construct in advance a mapping relationship of the identification information of the signal receiver and the sampling sectional area; and then after receiving the feedback shielding signal, the corresponding sampling sectional area can be inquired and obtained in the mapping relation according to the identification information, mathematical calculation is not needed, and the execution efficiency can be improved.
It should be noted that, the above embodiment is not limited to be implemented by computer software, but may be implemented by a digital circuit, the input may be the instruction code constructed according to the sequence of the signal receiver, the output is the gear code of the sampling sectional area, and the function of inputting to outputting can be implemented by designing a corresponding digital circuit encoder according to practical application.
The above embodiments are all application scenarios in which the signal receivers and the signal transmitters are in one-to-one correspondence, but the signal transmitters in the device of the present invention may be one of a laser sensor, an infrared sensor or an ultrasonic sensor, and are not limited to the case in which the signal receivers and the signal transmitters are in one-to-one correspondence.
In an embodiment in which a signal receiver and a signal transmitter are in a many-to-one relationship, as shown in fig. 8, an application scenario in which a plurality of signal receivers and a signal transmitter correspond is described. The diffuse infrared signal emitted by one signal emitter 201 has a certain divergence angle, so that the signal receivers 301-306 are all within the coverage range of the infrared signal when no shielding exists. If only signal receivers 303 and 304 of signal receivers 301-306 feed back an occlusion signal at a certain sampling instant, this means that the sampling cross-sectional area at that instant corresponds to the position of signal receivers 303 and 304. The processor may calculate the sampling cross-sectional area in real time through the preset position as described above, or may query the mapping relationship between the preset identification information and the sampling cross-sectional area according to the identification information of the signal receivers 303 and 304 as described above, so as to quickly obtain the sampling cross-sectional area.
In an embodiment where the signal receiver is in a many-to-many relationship with the signal transmitter, as shown in FIG. 9, there are a total of 4 infrared diffuse transmitting signal transmitters 201-204 and 10 signal receivers 301-310. Signal transmitters 201 and 202 and opposite signal receivers 301-306 are provided on the lateral sides of the rectangular channel structure, and signal transmitters 203 and 204 and opposite signal receivers 307-310 are provided on the vertical sides of the rectangular channel structure.
At this time, if the sampling sectional area is calculated according to the aforementioned embodiment of the signal transmitter for transmitting a signal by laser collimation, as in fig. 9, although the signal receivers 301 to 306 are blocked by the target object, the signal receiver always receives the signal of one or more signal transmitters due to the coverage of a plurality of signal transmitters. For this purpose, the device has two embodiments which can solve the problem of a signal transmitter for diffusion type transmission.
Mode one:
The signal sent by the signal transmitter of the device comprises the identification of the signal transmitter, the signal receiver not only feeds back the shielding signal to the processor, but also continuously feeds back the signal receiving state to the processor, and the signal receiving state comprises the identification information of the signal receiver and the identification information of the signal transmitter obtained after the signal receiver decodes the signal sent by the signal transmitter.
Referring to fig. 9, signal receivers 301 to 303 can only receive signals of signal transmitters 201 and 204 but cannot receive signals of signal transmitters 202 and 203 due to occlusion of a target object, so that signal receiving states can be continuously fed back to a processor, and only signals 201 and 204 are included in the signal receiving states of signal receivers 301 to 303;
Signal receivers 304-306 can only receive the signals of signal transmitters 202, 203 and 204, but cannot receive the signal of signal transmitter 201, so that the signal reception states of signal receivers 301-303 only include 202, 203 and 204 can be continuously fed back to the processor. The same thing 307-310 may also feed back the signal reception status to the processor. Because the positions of the signal transmitters and the signal receivers are preset, the processor can confirm the signal receiver which is at the boundary and is shielded by the target object according to the signal receiving state fed back by the signal receivers, and then calculate the sampling sectional area according to the positions of the signal receivers.
Specifically, the processor may determine the critical signal receiver of each signal transmitter according to the signal receiving state, and obtain the sampling cross-sectional area according to the positions or the identification information of the signal transmitter and the corresponding critical signal receiver. The critical signal receiver is a signal receiver adjacent to the blocked signal receiver and capable of receiving a signal. In the channel structure with rectangular cross section, when the signal receivers on the same side are used for searching critical signal receivers, the signal receivers close to the edges are selected in sequence.
For example, in fig. 9, the critical signal receiver of signal transmitter 201 may be determined to be 303 without signal transmitter 201 in the signal receiving state fed back by signal receivers 304, 305, and 306.
The critical signal receivers 309 and 304 of the signal transmitter 202 may be determined without the signal transmitter 202 in the signal reception state fed back by the signal receivers 310, 301, 302, and 303.
The signal receivers 301, 308, 309, and 310 feedback signal reception states without the signal transmitter 203; the critical signal receivers for signal transmitter 203 may be determined to be 302 and 307.
Signal receivers 307, 308, and 309 feedback signal reception states without signal transmitter 204; the critical signal receiver for the signal transmitter 204 may be determined to be 310.
The sampling sectional area is the area enclosed by the wires 201-303, 202-304, 202-309, 203-307, 203-302 and 204-310.
Mode two:
The processor can control one or more signal transmitters to sequentially transmit signals at intervals in a sampling period; acquiring a shielding signal fed back by a time sequence of a signal receiver in a sampling period; and obtaining the identification information of the signal receiver with the time sequence information in a sampling period according to the time sequence of the acquired shielding signal.
Referring to fig. 9, the processor sequentially controls the signal transmitters 201, 202, 203, and 204 to transmit signals during one sampling period, i.e., the processor performs time-sharing control of the transmission of the signal transmitters during one sampling period.
When the time slices arrive at the signal transmitter 201 to transmit a signal, the signal receivers 304, 305, and 306 feed back the occlusion signal, and the critical signal receiver 303 of the signal transmitter 201 can be determined.
When the time slices arrive at the signal transmitter 202 to transmit a signal, the signal receivers 310, 301, 302, and 303 feed back the occlusion signals, and the critical signal receivers 309 and 304 of the signal transmitter 202 can be determined.
When the time slices arrive at the signal transmitter 203 to transmit a signal, the signal receivers 301, 308, 309 and 310 feed back an occlusion signal; the critical signal receivers for signal transmitter 203 may be determined to be 302 and 307.
When the time slices arrive at the signal transmitter 204 transmitting a signal, the signal receivers 307, 308 and 309 feed back an occlusion signal; the critical signal receiver for the signal transmitter 204 may be determined to be 310.
The processor can confirm the identification information of the signal emitter corresponding to the shielding signal according to the time sequence of the shielding signal fed back, so that the sampling sectional area is calculated according to the positions of the signal emitter and the critical signal receiver. For example, in FIG. 9, the sampling cross-sectional areas are the areas enclosed by the wires 201-303, 202-304, 202-309, 203-307, 203-302, and 204-310.
In the first and second modes, it is preferable that the signal transmitters and the signal receivers are staggered on the inner wall of the channel structure. As shown in fig. 10, according to the arrangement, the coverage of the signals transmitted by the signal transmitters is more uniform, and the sampling sectional area calculated according to the manner of the critical signal receivers is more close to the actual sectional area of the target object, so that the accuracy can be improved.
It should be noted that, for the first and second modes, the processor may calculate the sampling sectional area in real time according to the positions of the signal transmitter and the critical signal receiver, and also may use the foregoing efficient mode of directly reading the corresponding sampling sectional area by querying the mapping relationship, which is not described herein.
In addition, in the above embodiments, the preset target object passing speed v n is empirical data, which is obtained by testing and simulating in different application scenarios in advance. In other embodiments, a speed measuring tool may be added to measure the speed of the target object in real time. For example, an image acquisition device may be added to the channel structure, and the speed of the target object may be acquired in real time by image recognition and substituted into the aforementioned volume integration formula.
The device can be applied to a plurality of application scenes, for example, the device can be arranged on an unmanned retail cabinet, a cabinet door opening is used as a channel structure, when a user selects a commodity in the unmanned retail cabinet and then takes the commodity out, the commodity inevitably passes through the cabinet door opening, a signal receiver at the cabinet door opening is shielded, the volume of the commodity can be measured according to the mode, and the type or price of the commodity can be determined according to the volume.
For example, the device can be arranged on a logistics conveying belt, a passing door arranged on the logistics conveying belt can be used as a channel structure, when goods move on the conveying belt, the goods pass through the passing door to shield a signal receiver on the passing people, the volume of the goods or the packages can be measured according to the mode, further, the freight is determined according to the volume, the volume of the packages does not need to be measured manually by an express delivery person, and the efficiency is greatly improved.
To solve the problems in the prior art, the present invention also proposes a method of measuring the volume of an object, the method being executable on a computer-based system, depending on a computer program; or may be implemented on a digital circuit basis. Specifically, as shown in fig. 11, the method includes:
step S102: and acquiring shielding signals fed back by a signal receiver arranged on the inner wall of the channel structure at a preset sampling frequency.
Step S104: and in one sampling period, determining the sampling sectional area of the target object in the sampling period according to the shielding signal.
Step S106: and carrying out volume integration on the sampling sectional area according to a preset speed value to obtain the volume of the target object.
In one embodiment, determining the sampling cross-sectional area of the target object in the sampling period from the occlusion signal further comprises:
acquiring identification information of a signal receiver corresponding to the shielding signal;
Acquiring a corresponding receiver position according to the identification information;
And calculating the sampling sectional area of the target object according to the receiver position.
In one embodiment, the determining the sampling cross-sectional area of the target object in the sampling period according to the occlusion signal further includes:
acquiring identification information of a signal receiver corresponding to the shielding signal;
Acquiring a mapping relation between preset identification information and sampling sectional areas;
And inquiring and acquiring the corresponding sampling sectional area in the mapping relation according to the identification information.
In one embodiment, the method further comprises:
controlling one or more signal transmitters to sequentially transmit signals at intervals in a sampling period;
in a sampling period, acquiring a signal receiving state fed back by a signal receiver, wherein the signal receiving state comprises identification information of the signal receiver and identification information of a signal transmitter of a signal source received by the signal receiver;
And determining critical signal receivers of all the signal transmitters according to the signal receiving states, and obtaining sampling sectional areas according to the positions or the identification information of the signal transmitters and the corresponding critical signal receivers.
In one embodiment, acquiring the identification information of the signal receiver corresponding to the occlusion signal further includes:
controlling one or more signal transmitters to sequentially transmit signals at intervals in a sampling period;
acquiring a shielding signal fed back by a time sequence of a signal receiver in a sampling period;
and obtaining the identification information of the signal receiver with the time sequence information in a sampling period according to the time sequence of the acquired shielding signal.
After the device and the method for measuring the volume of the object are adopted, the object to be measured only passes through the channel structure of the device, and at a certain sampling time in the passing process, signals sent by signal transmitters on the same plane on the channel structure are shielded, so that signal receivers at corresponding positions can not receive the signals and the shielding signals can be fed back to the processor. The processor can determine the sampling sectional area of the object to be detected on the plane of the signal receiver at the sampling moment according to the position of the signal receiver corresponding to the shielding signal, and then integrates the sampling sectional area, the passing speed and the passing time at each sampling moment to obtain the volume of the object. Compared with the prior art, the method only needs a plurality of low-cost signal transmitters and signal receivers, can be installed on any channel structure such as a express cabinet gate, a pass gate on a conveyor belt and the like, and has the advantages of greatly reduced cost, simple integral method for calculating the volume according to the sampling sectional area, small calculated amount and higher execution efficiency.
The foregoing is only illustrative of the present application and is not to be construed as limiting the scope of the application, and all equivalent structures or equivalent flow modifications which may be made by the teachings of the present application and the accompanying drawings or which may be directly or indirectly employed in other related art are within the scope of the application.
Claims (4)
1. A device for measuring the volume of an object, comprising a channel structure, and at least two signal transmitters and at least two signal receivers arranged on the inner wall of the channel structure, wherein the at least two signal transmitters and the at least two signal receivers are positioned on the same plane; a signal transmitter corresponding to the at least one signal receiver, a signal receiver corresponding to the at least one signal transmitter;
The device also comprises a processor connected with the signal receiver, wherein the processor is used for acquiring an occlusion signal fed back by the signal receiver at a preset sampling frequency; in a sampling period, determining the sampling sectional area of a target object in the channel structure in the sampling period according to the shielding signal; performing volume integration on the sampling sectional area according to a preset speed value to obtain the volume of the target object;
the signal transmitters and the signal receivers are staggered on the inner wall of the channel structure;
The signal sent by the signal transmitter comprises an identifier of the signal transmitter, the signal receiver feeds back a shielding signal and a signal receiving state to the processor, the signal receiving state comprises identifier information of the signal receiver, and the signal receiver decodes the signal sent by the signal transmitter to obtain the identifier information of the signal transmitter; the processor confirms the signal receiver which is in the boundary and is blocked by the target object of each signal transmitter according to the signal receiving state fed back by each signal receiver, and then calculates the sampling sectional area according to the position of the signal receiver;
Or alternatively, the first and second heat exchangers may be,
The processor controls one or more signal transmitters to sequentially transmit signals at intervals in a sampling period; acquiring a shielding signal fed back by a time sequence of a signal receiver in a sampling period; acquiring identification information of a signal receiver with time sequence information in a sampling period according to the acquired time sequence of the shielding signal; the processor confirms the identification information of the signal emitter corresponding to the shielding signal according to the time sequence of the shielding signal fed back, so that the sampling sectional area is calculated according to the positions of the signal emitter and the critical signal receiver.
2. The apparatus for measuring the volume of an object according to claim 1, wherein the signal emitter is one of a laser sensor, an infrared sensor, an acoustic sensor, or an ultrasonic sensor.
3. The apparatus for measuring the volume of an object of claim 1, wherein the port structure is a chest port of an express delivery cabinet, a door opening of an unmanned retail cabinet, or a pass-through door on a logistics conveyor.
4. A method of measuring the volume of an object, based on the device of measuring the volume of an object according to claim 1, characterized in that the method comprises:
Acquiring shielding signals fed back by a signal receiver arranged on the inner wall of a channel structure at a preset sampling frequency, wherein the signal transmitter and the signal receiver are staggered on the inner wall of the channel structure;
in a sampling period, determining the sampling sectional area of the target object in the sampling period according to the shielding signal;
Integrating the sampling sectional area according to a preset speed value to obtain the volume of the target object;
The signal sent by the signal transmitter comprises an identifier of the signal transmitter, the signal receiver feeds back a shielding signal and a signal receiving state, the signal receiving state comprises identifier information of the signal receiver, and the signal receiver decodes the signal sent by the signal transmitter to obtain the identifier information of the signal transmitter; confirming signal receivers which are in boundaries and are shielded by a target object according to the signal receiving states fed back by the signal receivers, and then calculating the sampling sectional area according to the positions of the signal receivers;
Or alternatively, the first and second heat exchangers may be,
Controlling one or more signal transmitters to sequentially transmit signals at intervals in a sampling period; acquiring a shielding signal fed back by a time sequence of a signal receiver in a sampling period; acquiring identification information of a signal receiver with time sequence information in a sampling period according to the acquired time sequence of the shielding signal; and confirming the identification information of the signal emitter corresponding to the shielding signal according to the time sequence of the shielding signal fed back, so as to calculate the sampling sectional area according to the positions of the signal emitter and the critical signal receiver thereof.
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