A bidirectional logistics van conveying system and an energy-saving operation control method thereof

Abstract

The application discloses a kind of bidirectional logistics car box conveying system and its energy-saving operation control method, the bidirectional logistics car box conveying system includes first conveyor, second conveyor, electric control unit, logistics car box, vacuum track;First conveyor, second conveyor are installed at sending ground and arrival ground two ends and are connected by vacuum track, and first conveyor, second conveyor are respectively provided with motor, control module, position sensor, speed sensor and the like.The energy-saving operation control method of the bidirectional logistics car box conveying system includes: electric control unit obtains each sensor detection signal, judges whether each conveyor enters logistics car box sending state, whether it enters receiving state, controls first conveyor and second conveyor to accelerate sending, deceleration receiving and recovery brake energy etc..The present application can realize the bidirectional high-speed sending of logistics car box, high-speed operation and low-speed receiving and recovery brake energy, with the advantages of fast, efficient and energy-saving and environment-friendly.

Description

Technical Field

[0001] This invention belongs to the field of modern logistics equipment technology. Specifically, this invention relates to a two-way logistics vehicle conveying system and its energy-saving operation control method. Background Technology

[0002] Existing land-based logistics transportation methods include road vehicle transportation, rail vehicle transportation, pipeline transportation, and conveyor belt transportation. Traditional road vehicle and rail vehicle transportation methods, using powered vehicles operating at high speeds, consume a lot of energy due to air resistance. Traditional pipeline transportation is mainly suitable for transporting fluids. Traditional conveyor belt transportation methods are slow and cannot recover braking energy. With the increasing volume and variety of goods transported, the issues of speed, efficiency, energy conservation, and environmental protection in logistics transportation urgently need to be addressed. Summary of the Invention

[0003] This invention provides a bidirectional logistics vehicle box conveying system and its energy-saving operation control method, aiming to achieve high-speed conveying of logistics vehicles and achieve the purpose of energy saving and environmental protection.

[0004] The technical solution adopted in this invention is as follows:

[0005] A bidirectional logistics vehicle conveying system includes a first conveyor, a second conveyor, an electrical control unit, a logistics vehicle, and a vacuum track. The first conveyor and the second conveyor are installed opposite each other in two locations and connected by the vacuum track.

[0006] The first conveyor is provided with a first free roller and a first powered roller arranged laterally. A first annular conveying belt and a first annular blocking belt are mounted side by side on the first free roller and the first powered roller. A first sending track and a first receiving track are arranged longitudinally above the first free roller and the first powered roller. The second conveyor is provided with a second free roller and a second powered roller arranged laterally. A second annular conveying belt and a second annular blocking belt are mounted side by side on the second free roller and the second powered roller. A second sending track and a second receiving track are arranged longitudinally above the second free roller and the second powered roller.

[0007] The vacuum track includes a first track and a second track fixed inside a vacuum tube. The first track is connected to a first transmitting track and a second receiving track, and the second track is connected to the first receiving track and the second transmitting track.

[0008] Preferably, the first conveyor is further provided with a first motor, and the power output end of the first motor is connected to one end of the first power roller.

[0009] The second conveyor is also equipped with a second motor, the power output end of which is connected to one end of the second power drum.

[0010] Preferably, the first conveyor is further provided with a first position sensor, a second position sensor and a third position sensor.

[0011] The first position sensor and the second position sensor are respectively installed on the first cover above the first sending track, and are used to detect the start and end sending positions of the logistics vehicle box on the first sending track; the third position sensor is installed on the first cover above the first receiving track, and is used to detect the start receiving position of the logistics vehicle box on the first receiving track.

[0012] The second conveyor is also equipped with a fourth position sensor, a fifth position sensor and a sixth position sensor.

[0013] The fourth and fifth position sensors are respectively installed on the second housing above the second sending track, and are used to detect the start and end sending positions of the logistics vehicle box on the second sending track; the sixth position sensor is installed on the second housing above the second receiving track, and is used to detect the start receiving position of the logistics vehicle box on the second receiving track.

[0014] Preferably, the first conveyor is further provided with a first control module, and the second conveyor is further provided with a second control module.

[0015] Preferably, the first control module has a first power input port, a first power output port, and a first control port; the first power input port is connected to the positive terminal of the power battery pack via a wire, the first power output port is connected to the first motor via a wire, and the first control port is connected to the first output port of the electronic control unit via a wire.

[0016] The second control module is provided with a second power input port, a second power output port, and a second control port; the second power input port is connected to the positive terminal of the power battery pack through a wire, the second power output port is connected to the second motor through a wire, and the second control port is connected to the second output port of the electronic control unit through a wire.

[0017] Preferably, both the first motor and the second motor are DC permanent magnet motors.

[0018] Preferably, the power battery pack is a composite power battery pack consisting of a supercapacitor pack and a storage battery pack connected in parallel.

[0019] Preferably, the logistics vehicle body is a non-powered, four-wheeled, enclosed vehicle body.

[0020] An energy-saving operation control method for a two-way logistics vehicle conveyor system includes the following steps:

[0021] The first step is to determine the location of the logistics vehicle compartment;

[0022] The second step is that if the logistics vehicle is in the sending position of the first conveyor, the first motor runs as an electric motor, and the first conveyor accelerates the sending of the logistics vehicle.

[0023] Third, if the logistics vehicle is in the receiving position of the first conveyor, the first motor operates as a generator, and the first conveyor recovers the braking energy of the logistics vehicle.

[0024] Fourth step: If the logistics vehicle is in the sending position of the second conveyor, the second motor runs as an electric motor, and the first conveyor accelerates the sending of the logistics vehicle.

[0025] Fifth, if the logistics vehicle is in the receiving position of the second conveyor, the second motor operates as a generator, and the first conveyor recovers braking energy from the logistics vehicle.

[0026] Preferably, the position of the logistics vehicle compartment is determined by including a first position sensor, a third position sensor, a fourth position sensor, and a sixth position sensor.

[0027] The advantages of this invention are: it can achieve both high-speed delivery and high-speed operation of high-speed logistics vehicles, as well as low-speed reception and regeneration of braking energy of high-speed logistics vehicles, thereby achieving the goals of bidirectional high-speed transmission and energy conservation and environmental protection of logistics vehicles. Attached Figure Description

[0028] Figure 1 This is a top view of the structural layout of the bidirectional logistics vehicle transport system of the present invention.

[0029] Figure 2 yes Figure 1 A cross-sectional view along the AA direction.

[0030] Figure 3 for Figure 2 Enlarged view of a section at point C.

[0031] Figure 4 for Figure 2 Enlarged view of a section at point D.

[0032] Figure 5 yes Figure 1 A cross-sectional view along the BB direction.

[0033] Figure 6 yes Figure 1 The diagram shows the components and connections of the electronic control system.

[0034] Figure 7 This is a flowchart of the energy-saving operation control method for the high-speed logistics vehicle conveyor system of the present invention.

[0035] In the diagram: 1-First conveyor; 2-Second conveyor; 3-Electrical control unit; 3C1-First output port; 3C2-Second output port; 4-Logistics vehicle body; 4a-Wheel; 4b-Front pull hook; 4c-Rear barrier hook; 5-Vacuum track; 5a-First track; 5b-Second track; 10-First free roller; 11-First annular pull belt; 11a-First pull groove; 12-First power roller; 13-First annular barrier belt; 13a-First barrier groove; 14-First motor; 14a-First control module; 14aI-First electric motor Source input port; 14aO - First power output port; 14aC - First control port; 15 - First frame; 16 - First cover; 17 - First sending track; 18 - First receiving track; 20 - Second free roller; 21 - Second annular conveyor belt; 21a - Second conveyor groove; 22 - Second power roller; 23 - Second annular barrier belt; 23a - Second barrier groove; 24 - Second motor; 24a - Second control module; 24aI - Second power input port; 24aO - Second power output port; 24aC - Second control port; 25-Second frame; 26-Second housing; 27-Second transmitting track; 28-Second receiving track; 31-First position sensor; 31S-First position signal input terminal; 32-Second position sensor; 32S-Second position signal input terminal; 33-Third position sensor; 33S-Third position signal input terminal; 34-Fourth position sensor; 34S-Fourth position signal input terminal; 35-Fifth position sensor; 35S-Fifth position signal input terminal; 36-Sixth position sensor; 36S-Sixth position signal input terminal; 37-First Speed ​​sensor; 37S-First speed signal input terminal; 38-Second speed sensor; 38S-Second speed signal input terminal; 39-Power battery pack; 51-First inlet track; 51a-First inlet gate; 52-First outlet track; 52a-First outlet gate; 53-Second inlet track; 53a-Second inlet gate; 54-Second outlet track; 54a-Second outlet gate; PS-Ⅰ-Position Ⅰ; PS-Ⅱ-Position Ⅱ; PS-Ⅲ-Position Ⅲ; PS-Ⅳ-Position Ⅳ; PS-Ⅴ-Position Ⅴ; PS-Ⅵ-Position Ⅵ. Detailed Implementation

[0036] In the description of this invention, it should be noted that the terms "lateral," "longitudinal," "center," "above," "below," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation and operation, and therefore should not be construed as a limitation of this invention. Furthermore, "first," "second," etc., are used for descriptive purposes only and should not be construed as implicitly indicating the number of technical features indicated.

[0037] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a bidirectional logistics vehicle conveying system includes a first conveyor 1, a second conveyor 2, an electrical control unit 3, a logistics vehicle 4, and a vacuum track 5. The first conveyor 1 and the second conveyor 2 are installed opposite each other in two locations and connected by the vacuum track 5. The first conveyor 1 is provided with a first free roller 10 and a first powered roller 12 arranged laterally. A first annular conveying belt 11 and a first annular blocking belt 13 are mounted side by side on the first free roller 10 and the first powered roller 12. A first sending track 17 and a first receiving track 18 arranged longitudinally are provided above the first free roller 10 and the first powered roller 12.

[0039] The second conveyor 2 is provided with a second free roller 20 and a second powered roller 22 arranged laterally. A second annular conveying belt 21 and a second annular blocking belt 23 are mounted side by side on the second free roller 20 and the second powered roller 22. A second sending track 27 and a second receiving track 28 are arranged longitudinally above the second free roller 20 and the second powered roller 22. The vacuum track 5 includes a first track 5a and a second track 5b fixed inside a vacuum tube. Its characteristics are:

[0040] The first conveyor 1 is also equipped with a first motor 14, a first control module 14a, a first position sensor 31, a second position sensor 32, a third position sensor 33, and a first speed sensor 37.

[0041] The second conveyor 2 is also equipped with a second motor 24, a second control module 24a, a fourth position sensor 34, a fifth position sensor 35, a sixth position sensor 36, and a second speed sensor 38.

[0042] The power output end of the first motor 14 is connected to one end of the first power roller 12; the first speed sensor 37 is used to detect the speed of the first power roller 12, and the first speed sensor 37 is fixedly installed on the first frame 15 with its probe maintaining a certain gap with the outer cylindrical surface of the first power roller 12.

[0043] The first position sensor 31 and the second position sensor 32 are respectively mounted on the first housing 16 above the first sending track 17, and are used to detect the start and end sending positions of the logistics vehicle 4 on the first sending track 17, respectively; the third position sensor 33 is mounted on the first housing 16 above the first receiving track 18, and is used to detect the start receiving position of the logistics vehicle 4 on the first receiving track 18. The probes of the first position sensor 31, the second position sensor 32, and the third position sensor 33 maintain a certain distance from the upper surface of the logistics vehicle 4.

[0044] The power output end of the second motor 24 is connected to one end of the second power roller 22; the second speed sensor 38 is used to detect the speed of the second power roller 22, and the second speed sensor 38 is fixedly installed on the second frame 25 with its probe maintaining a certain gap with the outer cylindrical surface of the second power roller 22.

[0045] The fourth position sensor 34 and the fifth position sensor 35 are respectively installed on the second housing 26 above the second sending track 27, and are used to detect the start and end sending positions of the logistics vehicle 4 on the second sending track 27, respectively; the sixth position sensor 36 is installed on the second housing 26 above the second receiving track 28, and is used to detect the start receiving position of the logistics vehicle 4 on the second receiving track 28. The probes of the fourth position sensor 34, the fifth position sensor 35, and the sixth position sensor 36 maintain a certain distance from the upper surface of the logistics vehicle 4.

[0046] The first control module 14a is provided with a first power input port 14aI, a first power output port 14aO, and a first control port 14aC. The first power input port 14aI is connected to the positive terminal of the power battery pack 39 through a wire, the first power output port 14aO is connected to the first motor 14 through a wire, and the first control port 14aC is connected to the first output port 3C1 of the electronic control unit 3 through a wire.

[0047] The second control module 24a is provided with a second power input port 24aI, a second power output port 24aO, and a second control port 24aC. The second power input port 24aI is connected to the positive terminal of the power battery pack 39 through a wire, the second power output port 24aO is connected to the second motor 24 through a wire, and the second control port 24aC is connected to the second output port 3C2 of the electronic control unit 3 through a wire.

[0048] One end of the first track 5a is connected to the first sending track 17 of the first conveyor 1, and the other end of the first track 5a is connected to the second receiving track 28 of the second conveyor 2; one end of the second track 5b is connected to the first receiving track 18 of the first conveyor 1, and the other end of the second track 5b is connected to the second sending track 27 of the second conveyor 2.

[0049] Preferably, both the first motor 14 and the second motor 24 are DC permanent magnet motors.

[0050] Preferably, the power battery pack 39 is a composite power battery pack consisting of a supercapacitor pack and a storage battery pack connected in parallel, in order to improve its performance in high-current power supply and high-current charging.

[0051] Preferably, the logistics vehicle box 4 is a non-powered four-wheeled enclosed vehicle box.

[0052] The logistics vehicle box 4 adopts a non-powered four-wheel enclosed box, which is not only simple in structure, but also convenient for transporting solid items, liquid items or general commodities.

[0053] The vacuum track 4 is kept under vacuum or low pressure to reduce the energy consumption caused by air resistance during the high-speed operation of the logistics vehicle 4.

[0054] The detection signals of the first position sensor 31, the second position sensor 32, and the third position sensor 33 are respectively connected to the first position signal input terminal 31S, the second position signal input terminal 32S, and the third position signal input terminal 33S of the electronic control unit 3. The detection signal of the first speed sensor 37 is connected to the first speed signal input terminal 37S of the electronic control unit 3.

[0055] The position signals detected by the fourth position sensor 34, the fifth position sensor 35, and the sixth position sensor 36 are respectively connected to the fourth position signal input terminal 34S, the fifth position signal input terminal 35S, and the sixth position signal input terminal 36S of the electronic control unit 3. The detection signal of the second speed sensor 38 is connected to the second speed signal input terminal 38S of the electronic control unit 3.

[0056] Both the first conveyor 1 and the second conveyor 2 have the functions of high-speed transmission, low-speed reception of logistics cart 4, and recovery of braking energy. Their structure and working principle are as follows:

[0057] The first free roller 10 and the first powered roller 12 of the first conveyor 1 are arranged laterally. The two ends of the first free roller 10 and the first powered roller 12 are mounted parallel to each other on the first frame 15 through bearings. A first annular conveying belt 11 and a first annular blocking belt 13 are mounted side by side on the first free roller 10 and the first powered roller 12. The outer surface of the first annular conveying belt 11 is provided with evenly distributed first conveying grooves 11a. The outer surface of the first annular blocking belt 13 is provided with evenly distributed first blocking grooves 13a.

[0058] Above a free roller 10 and a first powered roller 12, there are longitudinally arranged first sending track 17 and first receiving track 18; the first sending track 17 and the first receiving track 18 are both parallel tracks, the first sending track 17 is directly above the first annular conveyor belt 11, and the first receiving track 18 is directly above the first annular barrier belt 13. The first sending track 17 and the first receiving track 18 maintain a certain gap with the outer periphery of the first free roller 10 and the first powered roller 12; the longitudinal center lines of the first sending track 17 and the first receiving track 18 are parallel to the longitudinal center lines of the first annular conveyor belt 11 and the first annular barrier belt 13, respectively.

[0059] The second free roller 20 and the second powered roller 22 of the second conveyor 2 are arranged laterally. The two ends of the second free roller 20 and the second powered roller 22 are mounted parallel to each other on the second frame 25 through bearings. A second annular conveying belt 21 and a second annular blocking belt 23 are mounted side by side on the second free roller 20 and the second powered roller 22. The outer surface of the second annular conveying belt 21 is provided with evenly distributed second conveying grooves 21a. The outer surface of the second annular blocking belt 23 is provided with evenly distributed second blocking grooves 23a.

[0060] Above the second free roller 20 and the second powered roller 22 of the second conveyor 2, there is a longitudinally arranged second sending track 27 and a second receiving track 28. The second sending track 27 and the second receiving track 28 are both parallel tracks. The second sending track 27 is located directly above the second annular conveyor belt 21, and the second receiving track 28 is located directly above the second annular barrier belt 23. The second sending track 27 and the second receiving track 28 maintain a certain gap with the outer periphery of the second free roller 20 and the second powered roller 22. The longitudinal center lines of the second sending track 27 and the second receiving track 28 are parallel to the longitudinal center lines of the second annular conveyor belt 21 and the second annular barrier belt 23, respectively.

[0061] At the front and rear of the longitudinal center of the bottom surface of the logistics vehicle box 4, a front pull hook 4b and a rear blocking hook 4c are fixed respectively.

[0062] After the logistics vehicle 4 enters the first sending track 17 of the first conveyor 1, the weight of the logistics vehicle 4 is supported by the first sending track 17 through its wheels 4a and rolls along the first sending track 17. When the first position sensor 31 detects the starting sending position (PS-Ⅰ) of the logistics vehicle 4 on the first sending track 17, the front pull hook 4b of the logistics vehicle 4 is embedded in the tooth groove of the first pulling groove 11a of the first annular pull belt 11. The first motor 14 is powered on and runs, driving the first power roller 12 to rotate. The first power roller 12 drives the first annular pull belt 11 to move at high speed. The first pulling groove 11a generates a forward thrust on the front pull hook 4b of the logistics vehicle 4, pushing the logistics vehicle 4 to move synchronously and accelerate, realizing the accelerated sending of the logistics vehicle 4. The first motor 14 stops running until the second position sensor 32 detects the ending sending position (PS-Ⅱ) of the logistics vehicle 4 on the first sending track 17.

[0063] After the logistics vehicle box 4 enters the first receiving track 18 of the first conveyor 1, the weight of the logistics vehicle box 4 is supported by the first receiving track 18 through its wheels 4a and rolls along the first receiving track 18. When the third position sensor 33 detects the starting receiving position (PS-Ⅲ) of the logistics vehicle box 4 on the first receiving track 18, the rear blocking hook 4c of the logistics vehicle box 4 is embedded in the tooth groove of the first blocking groove 13a of the first annular blocking belt 13. The first blocking groove 13a generates a backward resistance on the rear blocking hook 4c, causing the logistics vehicle box 4 to decelerate and brake. Under the inertia of the logistics vehicle box 4, the first annular blocking belt 13 drives the first power roller 12 to rotate. The first power roller 12 drives the first motor 14 to generate electricity and charge the power battery pack 39, converting the kinetic energy of the logistics vehicle box 4 into electrical energy, realizing the deceleration and receiving of the logistics vehicle box 4 and the recovery of braking energy.

[0064] After the logistics vehicle 4 enters the second sending track 27 of the second conveyor 2, the weight of the logistics vehicle 4 is supported by the second sending track 27 through its wheels 4a and rolls along the second sending track 27. When the fourth position sensor 34 detects the starting sending position (PS-Ⅳ) of the logistics vehicle 4 on the second sending track 27, the front pull hook 4b of the logistics vehicle 4 is embedded in the tooth groove of the second pulling groove 21a of the second annular pull belt 21. The second motor 24 is powered on and drives the second power roller 22 to rotate. The second power roller 22 drives the second annular pull belt 21 to move. The second pulling groove 21a generates a forward thrust on the front pull hook 4b of the logistics vehicle 4, pushing the logistics vehicle 4 to move synchronously and accelerate, realizing the accelerated sending of the logistics vehicle 4. The second motor 24 stops running until the fifth position sensor 35 detects the ending sending position (PS-Ⅴ) of the logistics vehicle 4 on the second sending track 27.

[0065] After the logistics vehicle 4 enters the second receiving track 28 of the second conveyor 2, the weight of the logistics vehicle 4 is supported by the second receiving track 28 through its wheels 4a and rolls along the second receiving track 28. When the sixth position sensor 36 detects the starting receiving position (PS-VI) of the logistics vehicle 4 on the second receiving track 28, the rear blocking hook 4c of the logistics vehicle 4 is embedded in the tooth groove of the second blocking groove 23a of the second annular blocking belt 23. The second blocking groove 23a generates a backward resistance on the rear blocking hook 4c, causing the logistics vehicle 4 to decelerate and brake. Under the inertia of the logistics vehicle 4, the second annular blocking belt 23 drives the second power roller 22 to rotate. The second power roller 22 drives the second motor 24 to generate electricity and charge the power battery pack 39, converting the kinetic energy of the logistics vehicle 4 into electrical energy, realizing the deceleration and receiving of the logistics vehicle 4 and the recovery of braking energy.

[0066] When the logistics vehicle 4 is sent from the left to the right, the logistics vehicle 4 will pass through the following paths in sequence: first inlet track 51, first inlet gate 51a, accelerated sending on the first sending track 17 of the first conveyor 1, inertial travel on the first track 5a inside the vacuum track 5, deceleration and braking and recovery of braking energy on the second receiving track 28 of the second conveyor 2, second outlet gate 54a, and slow exit on the second exit track 54.

[0067] When the logistics vehicle 4 is sent from the right to the left for receiving, the logistics vehicle 4 will pass through the following paths in sequence: the second inlet track 53, the second inlet gate 53a, the second sending track 27 of the second conveyor 2 for accelerated sending, the second track 5b inside the vacuum track 5 for inertial travel, the first receiving track 18 of the first conveyor 1 for deceleration and braking and recovery of braking energy, the first outlet gate 52a, and the first exit track 52 for low-speed exit.

[0068] like Figure 5 As shown, an energy-saving operation control method for a two-way logistics vehicle conveyor system is characterized by the following steps:

[0069] S1, the electronic control unit 3 acquires the detection signals of each position sensor and each speed sensor: including the detection signals of the first position sensor 31, the second position sensor 32, the third position sensor 33, the fourth position sensor 34, the fifth position sensor 35, the sixth position sensor 36, the first speed sensor 37, and the second speed sensor 38.

[0070] S2, determine whether the logistics vehicle box 4 of the first conveyor 1 is in the starting sending position. If the first position sensor 31 detects the position signal of the logistics vehicle box 4 on the first sending track 17, it indicates that the logistics vehicle box 4 of the first conveyor 1 is in the starting sending position, and proceed to S6; otherwise, proceed to S3.

[0071] S3, determine whether the logistics vehicle box 4 of the first conveyor 1 is in the starting receiving position. If the third position sensor 33 detects the position signal of the logistics vehicle box 4 on the first receiving track 18, it indicates that the logistics vehicle box 4 of the first conveyor 1 is in the starting receiving position, and proceed to S8; otherwise, proceed to S4.

[0072] S4, determine whether the logistics vehicle box 4 of the second conveyor 2 is in the starting sending position. If the fourth position sensor 34 detects the position signal of the logistics vehicle box 4 on the second sending track 27, it indicates that the logistics vehicle box 4 of the second conveyor 2 is in the starting sending position, and proceed to S9; otherwise, proceed to S5.

[0073] S5, determine whether the logistics vehicle box 4 of the second conveyor 2 is in the starting receiving position. If the sixth position sensor 36 detects the position signal of the logistics vehicle box 4 on the second receiving track 28, it indicates whether the logistics vehicle box 4 of the second conveyor 2 is in the starting receiving position, and proceed to S11; otherwise, return to S1.

[0074] S6, the first conveyor 1 accelerates the delivery of the logistics vehicle 4, and the electronic control unit 3 controls the first motor 14 to run in the mode of an electric motor until the second position sensor 32 detects the position signal of the logistics vehicle 4 on the first delivery track 17. The first motor 14 then stops running, and then S7 is performed.

[0075] S7, the first conveyor 1 performs regenerative braking. The electronic control unit 3 controls the first motor 14 to operate as a generator to recover the kinetic energy of the first conveyor 1 until the speed signal detected by the first speed sensor 37 is zero. Then the first motor 14 stops running and returns to S1.

[0076] S8, recover the braking energy of the first conveyor 1 and the logistics vehicle 4. The electronic control unit 3 controls the first motor 14 to operate in generator mode to recover the kinetic energy of the first conveyor 1 and the logistics vehicle 4 until the speed signal detected by the first speed sensor 31 is zero. Then the first motor 14 stops running and returns to S1.

[0077] S9, the second conveyor 2 accelerates the delivery of the logistics vehicle 4, and the electronic control unit 3 controls the second motor 24 to run in the mode of an electric motor until the fifth position sensor 35 detects the position signal of the logistics vehicle 4 on the first delivery track 17. The second motor 24 then stops running, and then proceeds to S10.

[0078] S10, the second conveyor 2 performs braking energy recovery, and the second motor 24 operates as a motor until the speed signal detected by the second speed sensor 38 is zero. Then the second motor 24 stops running and returns to S1.

[0079] S11, recover the braking energy of the second conveyor 2 and the logistics vehicle 4. The second motor 24 operates as a generator to recover the kinetic energy of the second conveyor 2 and the logistics vehicle 4 until the speed signal detected by the second speed sensor 38 is zero. Then the second motor 24 stops running and returns to S1.

[0080] This cycle repeats continuously, achieving energy-saving control of the high-speed logistics vehicle conveyor system.

[0081] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A bidirectional logistics vehicle conveying system, characterized in that: It includes a first conveyor (1), a second conveyor (2), an electrical control unit (3), a logistics vehicle (4), and a vacuum track (5); The first free roller (10) and the first powered roller (12) of the first conveyor (1) are arranged laterally. The two ends of the first free roller (10) and the first powered roller (12) are mounted parallel to each other on the first frame (15) through bearings. A first annular conveying belt (11) and a first annular blocking belt (13) are mounted side by side on the first free roller (10) and the first powered roller (12). The outer surface of the first annular conveying belt (11) is provided with evenly distributed first conveying grooves (11a). The outer surface of the first annular blocking belt (13) is provided with evenly distributed first blocking grooves (13a). A first sending track (17) and a first receiving track (18) are arranged longitudinally above the first free roller (10) and the first powered roller (12); the first sending track (17) and the first receiving track (18) are both two parallel tracks. The first sending track (17) is located directly above the first annular conveyor belt (11), and the first receiving track (18) is located directly above the first annular barrier belt (13). The first sending track (17) and the first receiving track (18) maintain a certain gap with the outer periphery of the first free roller (10) and the first powered roller (12); the longitudinal center lines of the first sending track (17) and the first receiving track (18) are parallel to the longitudinal center lines of the first annular conveyor belt (11) and the first annular barrier belt (13), respectively. The second free roller (20) and the second powered roller (22) of the second conveyor (2) are arranged laterally. The two ends of the second free roller (20) and the second powered roller (22) are mounted parallel to each other on the second frame (25) through bearings. A second annular conveying belt (21) and a second annular blocking belt (23) are fitted side by side on the second free roller (20) and the second powered roller (22). The outer surface of the second annular conveying belt (21) is provided with evenly distributed second conveying grooves (21a). The outer surface of the second annular blocking belt (23) is provided with evenly distributed second blocking grooves (23a). Above the second free roller (20) and the second powered roller (22) of the second conveyor (2), there are longitudinally arranged second sending track (27) and second receiving track (28); the second sending track (27) and the second receiving track (28) are both parallel tracks, the second sending track (27) is located directly above the second annular conveyor belt (21), and the second receiving track (28) is located directly above the second annular barrier belt (23). The second sending track (27) and the second receiving track (28) maintain a certain gap with the outer periphery of the second free roller (20) and the second powered roller (22); the longitudinal center lines of the second sending track (27) and the second receiving track (28) are parallel to the longitudinal center lines of the second annular conveyor belt (21) and the second annular barrier belt (23), respectively. The first conveyor (1) and the second conveyor (2) are installed opposite each other at two locations and connected by a vacuum track (5); The vacuum track (5) includes a first track (5a) and a second track (5b) fixed inside the vacuum tube. The first track (5a) is connected to the first transmitting track (17) and the second receiving track (28), and the second track (5b) is connected to the first receiving track (18) and the second transmitting track (27). After the logistics vehicle (4) enters the first sending track (17) of the first conveyor (1), the weight of the logistics vehicle (4) is supported by the first sending track (17) through its wheels (4a) and rolls along the first sending track (17). When the first position sensor (31) detects that the logistics vehicle (4) is at the starting sending position PS-Ⅰ on the first sending track (17), the front pull hook (4b) of the logistics vehicle (4) is embedded in the tooth groove of the first pull groove (11a) of the first annular pull belt (11), and the first motor (14) is powered on. The first motor (14) drives the first power roller (12) to rotate, and the first power roller (12) drives the first annular conveyor belt (11) to move at high speed. The first conveyor groove (11a) generates a forward thrust on the front conveyor hook (4b) of the logistics vehicle (4), pushing the logistics vehicle (4) to accelerate synchronously, thereby accelerating the delivery of the logistics vehicle (4) until the second position sensor (32) detects that the logistics vehicle (4) is at the end delivery position PS-Ⅱ on the first delivery track (17). At this point, the first motor (14) stops running. After the logistics vehicle (4) enters the first receiving track (18) of the first conveyor (1), the weight of the logistics vehicle (4) is supported by the first receiving track (18) through its wheels (4a) and rolls along the first receiving track (18). When the third position sensor (33) detects that the logistics vehicle (4) is at the starting receiving position PS-Ⅲ on the first receiving track (18), the rear blocking hook (4c) of the logistics vehicle (4) is embedded in the first blocking groove (1) of the first annular blocking belt (13). 3a) In the tooth groove, the first blocking groove (13a) generates a backward resistance to the rear blocking hook (4c), causing the logistics vehicle box (4) to decelerate and brake. Under the inertia of the logistics vehicle box (4), the first annular blocking belt (13) drives the first power roller (12) to rotate. The first power roller (12) drives the first motor (14) to generate electricity and charge the power battery pack (39), converting the kinetic energy of the logistics vehicle box (4) into electrical energy, thereby realizing the deceleration reception and braking energy recovery of the logistics vehicle box (4). The first conveyor (1) is also equipped with a first position sensor (31), a second position sensor (32) and a third position sensor (33); The first position sensor (31) and the second position sensor (32) are respectively installed on the first cover (16) above the first sending track (17) and are used to detect the start sending position and end sending position of the logistics vehicle (4) on the first sending track (17); the third position sensor (33) is installed on the first cover (16) above the first receiving track (18) and is used to detect the start receiving position of the logistics vehicle (4) on the first receiving track (18); The second conveyor (2) is also equipped with a fourth position sensor (34), a fifth position sensor (35) and a sixth position sensor (36); The fourth position sensor (34) and the fifth position sensor (35) are respectively installed on the second housing (26) above the second sending track (27) and are used to detect the start sending position and end sending position of the logistics vehicle (4) on the second sending track (27); the sixth position sensor (36) is installed on the second housing (26) above the second receiving track (28) and is used to detect the start receiving position of the logistics vehicle (4) on the second receiving track (28). The first conveyor (1) is further provided with a first control module (14a), and the second conveyor (2) is further provided with a second control module (24a); The first control module (14a) is provided with a first power input port (14aI), a first power output port (14aO), and a first control port (14aC); the first power input port (14aI) is connected to the positive terminal of the power battery pack (39) through a wire, the first power output port (14aO) is connected to the first motor (14) through a wire, and the first control port (14aC) is connected to the first output port (3C1) of the electronic control unit (3) through a wire; The second control module (24a) is provided with a second power input port (24aI), a second power output port (24aO), and a second control port (24aC). The second power input port (24aI) is connected to the positive terminal of the power battery pack (39) through a wire, the second power output port (24aO) is connected to the second motor (24) through a wire, and the second control port (24aC) is connected to the second output port (3C2) of the electronic control unit (3) through a wire.

2. The bidirectional logistics vehicle conveying system according to claim 1, characterized in that: The power output end of the first motor (14) is connected to one end of the first power roller (12); The power output end of the second motor (24) is connected to one end of the second power roller (22).

3. The bidirectional logistics vehicle conveying system according to claim 2, characterized in that: Both the first motor (14) and the second motor (24) are DC permanent magnet motors.

4. The bidirectional logistics vehicle conveying system according to claim 2, characterized in that: The power battery pack (39) is a composite power battery pack consisting of a supercapacitor pack and a storage battery pack connected in parallel.

5. A bidirectional logistics vehicle conveying system according to any one of claims 1 to 4, characterized in that: The logistics vehicle compartment (4) is a non-powered, four-wheeled, enclosed compartment.

6. The energy-saving operation control method for a bidirectional logistics vehicle conveyor system according to claim 5, characterized in that, Includes the following steps: The first step is to determine the location of the logistics vehicle compartment (4); In the second step, if the logistics vehicle (4) is in the sending position of the first conveyor (1), the first motor (14) runs in the mode of an electric motor, and the first conveyor (1) accelerates the sending of the logistics vehicle (4); Third step, if the logistics vehicle box (4) is in the receiving position of the first conveyor (1), the first motor (14) operates as a generator, and the first conveyor (1) recovers braking energy from the logistics vehicle box (4); Fourth step, if the logistics vehicle (4) is in the sending position of the second conveyor (2), the second motor (24) runs in the mode of an electric motor, and the second conveyor (2) accelerates the sending of the logistics vehicle (4); Fifth step: If the logistics vehicle (4) is in the receiving position of the second conveyor (2), the second motor (24) operates as a generator and the second conveyor (2) recovers braking energy from the logistics vehicle (4).

7. The energy-saving operation control method for a bidirectional logistics vehicle conveyor system according to claim 6, characterized in that: The position of the logistics vehicle box (4) is determined by a first position sensor (31), a third position sensor (33), a fourth position sensor (34), and a sixth position sensor (36).

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