Device and method for detecting garbage can of rear-loading compression garbage truck
The technical field is as follows:
the invention relates to a device and a method for detecting a garbage can of a rear-loading compression garbage truck. The RFID electronic tag is fixed on the lower part of the front surface of the garbage can, and the RFID reader-writer is arranged on the middle rear part of a chassis frame of the garbage can. When the vehicle is static and the speed of the vehicle is 0, the RFID reader-writer is driven by the electric push rod to extend out and descend to the bottom of the chassis frame of the garbage can, and information in the RFID electronic tag at the lower part of the garbage can is read. When the vehicle runs and the speed is not 0, the RFID reader-writer is driven by the electric push rod to withdraw and move to the upper part of the chassis frame of the garbage truck, so that the vehicle is prevented from being collided and polluted when running, and the method belongs to the field of garbage classification and real-time weighing of garbage transport vehicles.
Background art:
in the field of real-time weighing of garbage classification and garbage transport vehicles, information such as garbage bin serial numbers, garbage classification numbers and garbage bin weights in RFID electronic tags on garbage bins are read by RFID readers. The invention patent application No. 201910570522.8 relates to a sanitation vehicle weighing system and an operation method, and the function of an RFID identification module is mentioned, but the problems and the installation method in the use process are not related. In fact, the RFID reader-writer has an effective reading-writing angle (about 60) when reading the information in the RFID electronic tag 。 —120 。 ) Outside the valid reading angle, a so-called reading blind area will not read information or misread. When the rear-loading compression garbage truck loads and unloads garbage, two garbage cans are arranged side by side, when one RFID reader-writer is used for simultaneously reading information in the RFID electronic tags on the two garbage cans, the RFID reader-writer needs to be arranged at the symmetrical center positions of the two garbage cans, and the RFID electronic tags are likely to be positioned in reading blind areas of the RFID reader-writer, so that the information is missed or misread. In addition, the metal plate of the garbage can hanging rack can also obstruct the RFID reader-writer from reading the information in the RFID electronic tag.
An effective method for avoiding the reading blind area is to increase the distance between the RFID reader and the RFID tag, that is, to install the RFID reader as far as possible from the RFID tag on the trash can.
An effective method for preventing the metal plate of the garbage can hanging frame from obstructing the RFID reader-writer from reading the information in the RFID electronic tag is to place the RFID reader-writer at the bottom of the chassis frame and read the information in the RFID electronic tag at the bottom of the garbage can. Because a certain height exists between the metal plate of the garbage can hanging rack and the ground under normal conditions, the RFID electronic tag is installed below the certain height, and the read information cannot be blocked by the metal plate of the garbage can hanging rack.
The height between the RFID reader-writer and the ground is reduced, and although the read information is not blocked by a metal plate of the garbage can hanging rack any more, the read information is close to the ground and is easy to collide and pollute in the driving process. It is necessary to design the RFID reader/writer to be extendable and retractable structure, to be extended when the vehicle is stationary and reading information, and to be retracted when the vehicle is running.
The invention content is as follows:
aiming at the defects of the prior art, the invention relates to a device and a method for detecting a garbage can of a rear-loading compression garbage truck. The RFID electronic tag is fixed on the lower portion of the front face of the garbage can, and the RFID reader-writer is mounted on the middle rear portion of a chassis frame of the garbage truck. When the vehicle is static and the speed is 0, the RFID reader-writer is driven by the electric push rod to extend out and descend to the bottom of the chassis frame of the garbage can to read information in the RFID electronic tag at the lower part of the garbage can. When the vehicle runs and the speed is not 0, the RFID reader-writer is driven by the electric push rod to be withdrawn and moves upwards to the upper part of the chassis frame of the garbage truck, so that the vehicle is prevented from being collided and polluted during running.
The invention is realized by the following technical scheme. The invention relates to a device and a method for detecting a garbage can of a rear-loading compression garbage truck, which comprises a rear-loading compression garbage truck 1, a chassis frame 2, a garbage can lifting arm 3, a hydraulic oil cylinder 4, a garbage can hanging frame 5, a garbage can 6, an RFID electronic tag 7, an RFID reader-writer 8, an electric push rod 9, a vehicle speed sensor 10, an MCU controller 11 and the like, and is characterized in that: the RFID electronic tag 7 is fixed on the lower portion of the front face of the garbage can 6, the RFID reader-writer 8 is located on the middle rear portion of the garbage truck chassis frame 2, the RFID reader-writer 8 is fixed on the lower end of the electric push rod 9, the RFID reader-writer 8 is driven by the electric push rod to extend downwards or retract upwards, the upper end of the electric push rod 9 is fixed on the chassis frame 2, an instruction of the electric push rod 9 extending downwards or retracting upwards is sent out by the MCU controller 11, and the vehicle speed sensor 10 sends vehicle speed information of a vehicle in a static state or a driving state to the MCU controller 11.
The invention is also characterized in that: the electric push rod 9 can also be a cylinder or an oil cylinder.
The invention is also characterized in that: after the electric push rod 9 drives the RFID reader-writer 8 to extend out of the bottom of the garbage truck chassis frame 2, the RFID reader-writer 8 and the RFID electronic tag 7 are not blocked by a metal plate of the garbage can hanging barrel frame 5.
The invention is also characterized in that: after the electric push rod 9 drives the RFID reader-writer 8 to extend out and descend to the bottom of the chassis frame of the garbage truck, the distances between the RFID reader-writer 8 and the RFID electronic tags 7-1 and 7-2 on the two garbage cans 6-1 and 6-2 are close, and no blind area exists.
The working principle of the invention is as follows: when the vehicle is static and the vehicle speed is 0, the RFID reader-writer 8 is driven by the electric push rod 9 to extend out and descend to the bottom of the chassis frame of the garbage truck to read information in the RFID electronic tag 7 at the lower part of the garbage can 6; when the vehicle runs and the speed is not 0, the RFID reader-writer 8 is driven by the electric push rod 9 to be retracted and ascended to the upper part of the chassis frame of the garbage truck, so that the RFID reader-writer 8 is prevented from being collided and polluted when the vehicle runs.
The invention has substantial characteristics and remarkable progress. The invention relates to a device and a method for detecting a garbage can of a rear-loading compression garbage truck. The RFID electronic tag is fixed on the lower portion of the front face of the garbage can, and the RFID reader-writer is mounted on the middle rear portion of a chassis frame of the garbage truck. When the vehicle is static and the speed is 0, the RFID reader-writer is driven by the electric push rod to extend out and descend to the bottom of the chassis frame of the garbage can to read information in the RFID electronic tag at the lower part of the garbage can. When the vehicle runs and the speed is not 0, the RFID reader-writer is driven by the electric push rod to be withdrawn and moves upwards to the upper part of the chassis frame of the garbage truck, so that the vehicle is prevented from being collided and polluted during running.
Drawings
FIG. 1 is a side view of the relative positions of the components.
Fig. 2 is a schematic diagram of relative positions of a garbage can hanging rack and 2 garbage cans.
FIG. 3 is a schematic diagram showing the relationship between the distance and the included angle between the RFID tags on the 2 trash cans and the RFID reader-writer.
The specific implementation mode is as follows:
the invention relates to a device and a method for detecting a garbage can of a rear-loading compression garbage truck, which are shown in the attached drawings, and the device and the method for detecting the garbage can of the rear-loading compression garbage truck comprise a rear-loading compression garbage truck 1, a chassis frame 2, a garbage can lifting arm 3, a hydraulic oil cylinder 4, a garbage can hanging frame 5, a garbage can 6, an RFID electronic tag 7, an RFID reader-writer 8, an electric push rod 9, a vehicle speed sensor 10, an MCU controller 11 and the like, and are characterized in that: the RFID electronic tag 7 is fixed on the lower portion of the front face of the garbage can 6, the RFID reader-writer 8 is located on the middle rear portion of the garbage truck chassis frame 2, the RFID reader-writer 8 is fixed on the lower end of the electric push rod 9, the RFID reader-writer 8 is driven by the electric push rod to extend downwards or retract upwards, the upper end of the electric push rod 9 is fixed on the chassis frame 2, an instruction of the electric push rod 9 extending downwards or retracting upwards is sent out by the MCU controller 11, and the vehicle speed sensor 10 sends vehicle speed information of a vehicle in a static state or a driving state to the MCU controller 11.
The invention is also characterized in that: the electric push rod 9 can also be a cylinder or an oil cylinder.
The invention is also characterized in that: after the electric push rod 9 stretches out the RFID reader-writer 8 and moves downwards to the bottom of the garbage truck chassis frame 2, the RFID reader-writer 8 and the RFID electronic tag 7 are not blocked by a metal plate of the garbage can hanging barrel frame 5.
The invention is also characterized in that: when the electric push rod 9 drives the RFID reader-writer 8 to extend out and descend to the bottom of the garbage truck chassis frame, the distances between the RFID reader-writer 8 and the RFID electronic tags 7-1 and 7-2 on the two garbage cans 6-1 and 6-2 are equal or close, the RFID electronic tag 7-1 on the first garbage can 6-1 and the RFID electronic tag 7-2 on the second garbage can 6-2 are symmetrically distributed by taking the RFID reader-writer 8 as a center and form an isosceles triangle relationship, the three are not blocked on respective straight paths and cannot generate blind areas, and the RFID electronic tag 7-1 on the first garbage can 6-1 and the RFID electronic tag 7-2 on the second garbage can 6-2 can be read by the RFID reader-writer 8 at the same time.
A detection method of a garbage can detection device of a rear-loading compression garbage truck comprises the following steps:
a. when the afterloading compression garbage truck 1 is static, loading the first garbage can 6-1 provided with the first RFID electronic tag 7-1 and the second garbage can 6-2 provided with the second RFID electronic tag 7-2 on the afterloading compression garbage truck 1 towards the compression garbage truck 1;
b. when the speed sensor 10 detects that the speed of the rear-loading compression garbage truck 1 is 0, an electric push rod descending key electrically connected with an MCU (microprogrammed control unit) controller is pressed, the MCU controller sends a signal to an electric push rod 9, the RFID reader-writer 8 is driven by the electric push rod 9 to extend downwards and descend below a chassis frame of the garbage truck 1, and information in RFID electronic tags at the lower part of garbage cans on the same plane on the rear-loading compression garbage truck 1 is read;
c. when reading the information in the RFID electronic tags, the RFID reader-writer 8 is positioned at the symmetrical center position of two garbage cans loaded on the rear-loading compression garbage truck 1, the included angle between the RFID reader-writer 8 and the first RFID electronic tag 7-1 on the first garbage can 6-1 and the included angle between the RFID reader-writer 8 and the second RFID electronic tag 7-2 on the second garbage can 6-2 are within 60-120 degrees, no blind zone exists, and the RFID reader-writer cannot be blocked by a metal plate of the garbage can hanging frame 5 to cause the missed reading or misreading of the information in the RFID electronic tags by the RFID reader-writer;
d. and (c) repeating the steps a to c until the rear-mounted compression garbage truck 1 finishes dumping operation of all garbage cans, when driving is restarted, the vehicle speed sensor 10 detects that the vehicle speed of the rear-mounted compression garbage truck 1 is not 0, the MCU controller 11 receives a signal from the vehicle speed sensor 10, the MCU controller sends a recovery signal to the electric push rod 9 according to the condition that the preset value of the vehicle speed sensor 10 is not 0, the electric push rod 9 drives to recover the RFID reader-writer 8, and the RFID reader-writer ascends to a concave part between chassis frames of the rear-mounted compression garbage truck 1, so that detection is finished. In order to prevent the vehicle from being collided and polluted when the vehicle runs, the control key is not pressed when the vehicle speed is not 0.