Truck overload monitoring mobile intelligent terminal and early warning system

Abstract

The invention relates to the technical field of overload intelligent terminals, in particular to a lorry overload monitoring mobile intelligent terminal and early warning system, which comprises a lorry overload parking device, a fixing device for locking the lorry overload parking device and a first detection device for monitoring the state of the fixing device, the truck overload parking device is mounted in a mounting frame on a truck body, the fixing device is arranged on the mounting frame, the truck overload parking device is arranged on the truck, so that the overloaded truck cannot be started, and meanwhile, the fixing device and a detection device are further arranged to prevent the truck overload parking device from being maliciously dismounted.

Description

Technical Field

[0001] The present invention relates to the technical field of overload intelligent terminals, and in particular to a truck overload monitoring mobile intelligent terminal and an early warning system. Background Art

[0002] According to statistics, a large number of road traffic accidents are directly or indirectly caused by overloaded vehicles.

[0004] Prohibiting overloaded trucks from starting, taking to the road, or going onto bridges is a key measure to resolve truck overloading through inherently safe means. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a mobile intelligent terminal and early warning system for monitoring truck overload. By arranging a truck overload parking device on the truck, the overloaded truck cannot be started. At the same time, a fixing device and a detection device are also provided to prevent the truck overload parking device from being maliciously removed.

[0006] To achieve the above object, the present invention provides the following technical solutions: A mobile intelligent terminal for monitoring truck overload, comprising a truck overload parking device, a fixing device for locking the truck overload parking device, and a first detection device for monitoring the status of the fixing device, wherein the truck overload parking device is installed in a mounting frame on a truck body, and the fixing device is arranged on the mounting frame; the fixing device comprises an expansion link and a stop block arranged on the expansion link, and the stop block can prevent the truck overload parking device from detaching from the mounting frame; the expansion link is supported in a support ear installed on the mounting frame, a limit plate is fixed at one end of the mounting frame, and the expansion link is engaged with the limit plate; one end of the expansion link is inserted into an operating member, the operating member is arranged on a guide plate, and the guide plate is fixed on the mounting frame, and the first detection device is arranged on one side of the operating member.

[0007] Furthermore, the truck overload parking device includes a relay module, a remote control module and a signal conversion module. The normally closed contact NC terminal of the relay module is connected to the truck engine, and the common terminal COM of the relay is connected to the power supply; the remote control module is connected between the power supply and the engine, and the relay module is connected to the excitation pressure sensor through the signal conversion module.

[0008] Furthermore, the expansion link includes a first connecting end, a mounting section, a cylindrical section, a limiting section and a second connecting end connected in sequence; the stop block is fixed to the mounting section, and multiple expansion links can be arranged on the mounting frame, and the second connecting end of one of the expansion links can be inserted into the expansion groove of the first connecting end of another expansion link.

[0009] Furthermore, the cylindrical section of the expansion link is supported in the arc groove of the support ear, and the support ear is fixedly connected to the mounting frame through a fixing portion; the expansion link can rotate in the support ear through the cylindrical section to realize the switching of the stop block between a locked state and a released state; a second detection device is also provided on the support ear, and the installation status of the stop block and the expansion link is detected by the second detection device.

[0010] Furthermore, the stop block is fixed to the mounting section of the expansion link through a fixing assembly, and a lock tongue block is hingedly provided on the fixing assembly through a rotating shaft; a torsion spring is sleeved on the rotating shaft, and two ends of the torsion spring respectively abut the lock tongue block and the fixing assembly; when the truck overload parking device is installed, the bottom of the truck overload parking device can push the lock tongue block to rotate in a first direction relative to the fixing assembly, so that the lock tongue block enters the limiting groove on the side of the truck overload parking device; the lock tongue block cannot rotate in a direction opposite to the first direction relative to the fixing assembly, so as to provide locking of the limiting groove.

[0011] Furthermore, the fixing assembly includes a fixing seat and a fixing plate, the upper fixing groove of the fixing plate and the lower fixing groove of the fixing seat are clamped with the mounting section of the expansion connecting rod; the fixing plate and the fixing seat are fixedly connected by screw holes and bolts; the fixing assembly is also provided with a hinge seat, the rotating shaft is passed through the hinge seat, and the hinge seat is provided with an installation space for accommodating a torsion spring; the lock tongue block is provided with an abutment portion with an arc-shaped cross-section, and the lock tongue block is connected to the rotating shaft on the hinge seat through a hinge portion.

[0012] Furthermore, the operating member is provided with an accommodating portion for accommodating the second connecting end of the expansion link; the accommodating portion includes a first end face and a second end face of different depths, and an inclined transition face is provided between the first end face and the second end face; an axial hole is provided in the second connecting end of the expansion link, a wheel seat is provided in the axial hole, and a roller is provided on the wheel seat; the roller rolls on the first end face, the second end face and the transition face.

[0013] Furthermore, the guide plate includes a support plate that supports the bottom of the operating piece, end limit plates are provided at both ends of the support plate, and side limit plates are provided on the side of the support plate; the operating piece slides on the support plate along the side limit plates; when the operating piece is in the first position on the guide plate, the first end face of the operating piece corresponds to the roller of the expansion connecting rod; when the operating piece is in the second position on the guide plate, the second end face of the operating piece corresponds to the roller of the expansion connecting rod.

[0014] Furthermore, the limit plate is fixed to the mounting frame, and the expansion link passes through the square groove on the limit plate; the limit section of the expansion link cooperates with the square groove, and when the first end face of the operating member abuts against the roller of the expansion link, the limit section is engaged with the square groove, and the square groove limits the rotation of the expansion link; when the operating member moves to the second position of the guide plate, the expansion link can translate in the square groove to the second end face of the roller abutting the operating member, and at this time, the cylindrical section of the expansion link is in contact with the square groove.

[0015] A truck overload monitoring and early warning system comprises a first-level security system arranged on the truck body and a second-level security system arranged on the road surface where the truck is traveling. The first-level security system is an overload monitoring mobile intelligent terminal installed on the truck body, comprising an excitation pressure sensor for obtaining the truck load, and a truck overload parking device connected to the excitation pressure sensor and the truck safety braking system; the second-level security system comprises an excitation pressure sensor arranged on the road surface, and a communication module connected to the excitation pressure sensor arranged on the road surface; the communication module obtains a load signal generated by the excitation pressure sensor arranged on the road surface when the truck travels to it, determines whether it is always present and sends a warning signal; the communication module also communicates with the overload monitoring mobile intelligent terminal arranged on the truck body to obtain overload and position information.

[0016] Compared with the prior art, the present invention provides a mobile intelligent terminal and early warning system for monitoring overloaded trucks, which have the following beneficial effects: the present invention sets a truck overload parking device on the truck so that the overloaded truck cannot be started, and also sets a fixing device and a detection device to prevent the truck overload parking device from being maliciously dismantled; the expansion connecting rod of the fixing device can connect multiple stop blocks to fix multiple vehicle-mounted devices as needed, and the installation state of the expansion connecting rod can be obtained through the first detection device, and there is also a second detection device to detect whether the stop block and the expansion connecting rod are maliciously damaged, so as to prevent the carrier from illegally dismantling the truck overload parking device. At the same time, the fixing device of the present invention is easy to operate, and when the truck is parked and the truck overload parking device needs to be maintained and data read, the fixing device is unlocked by controlling the operating member. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a truck overload monitoring and early warning system according to the present invention; Figure 2 It is a structural schematic diagram of the overload parking device for trucks of the present invention; Figure 3 is a schematic diagram of the second security system of the present invention; Figure 4 This is a structural diagram of a mobile intelligent terminal for monitoring overloaded trucks according to the present invention; Figure 5A schematic diagram of the truck overload monitoring mobile intelligent terminal of the present invention in an open state; Figure 6 It is a schematic structural diagram of the support ear and the guide plate of the present invention; Figure 7 It is a schematic diagram of the internal structure of the operating part of the present invention; Figure 8 It is a structural explosion diagram of the stop block of the present invention; Fig. 9 It is a structural schematic diagram of a fixing component in a stop block of the present invention; Fig.10 It is a structural schematic diagram of the expansion connecting rod of the present invention; In the figure: Stop block 1, lock tongue block 11, abutment portion 111, hinge portion 112, fixing assembly 12, fixing seat 121, lower fixing groove 1211, hinge seat 1212, fixing plate 122, upper fixing groove 1221, screw hole 1222, rotating shaft 13, torsion spring 14; Extension connecting rod 2, first connecting end 21, extension slot 211, mounting section 22, limiting section 23, wheel seat 24, roller 25, cylindrical section 26, second connecting end 27, shaft hole 271; The ear 3, the fixing portion 31, the arc groove 32, and the second detection device 33; Truck overload parking device 4, limit slot 41; Mounting frame 5; limiting plate 6, square groove 61; Guide plate 7, support plate 71, end limit plate 72, side limit plate 73; Operating member 8, first end surface 81, second end surface 82, accommodating portion 80; A first detection device 9; DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The present invention is described in detail below according to the accompanying drawings. A mobile intelligent terminal and early warning system for monitoring truck overload of the present invention comprises a truck overload parking device 4, a fixing device for locking the truck overload parking device 4, and a first detection device 9 for monitoring the state of the fixing device. The truck overload parking device 4 is installed in a mounting frame 5 on a truck body, and the fixing device is arranged on the mounting frame 5; the fixing device comprises an expansion link 2 and a stop block 1 arranged on the expansion link 2, and the stop block 1 can prevent the truck overload parking device 4 from detaching from the mounting frame 5; the expansion link 2 is supported in a support ear 3 installed on the mounting frame 5, and a limit plate 6 is fixed at one end of the mounting frame 5, and the expansion link 2 is snap-fitted with the limit plate 6; one end of the expansion link 2 is inserted into an operating member 8, and the operating member 8 is arranged on a guide plate 7, and the guide plate 7 is fixed on the mounting frame 5, and the first detection device 9 is arranged on one side of the operating member 8.

[0020] Specifically, Figure 4 As shown, the truck overload parking device 4 is inserted downward and installed in the mounting frame 5. When the truck overload parking device 4 is installed, the stop block 1 can be rotated downward to allow the truck overload parking device 4 to be installed in place. After the truck overload parking device 4 is engaged with the stop block 1, the stop block 1 can prevent the truck overload parking device 4 from moving upward and detaching from the mounting frame 5, thereby preventing the carrier from dismantling the truck overload parking device 4. The stop block 1 can be switched from a locked state to a released state through the operating member 8, and the position state of the operating member 8 is detected by the first detection device 9, so that the installation state of the truck overload parking device 4 can be obtained.

[0021] The truck overload parking device 4 includes a relay module, a remote control module and a signal conversion module. The normally closed contact NC terminal of the relay module is connected to the truck engine, and the common terminal COM of the relay is connected to the power supply; the remote control module is connected between the power supply and the engine, and the relay module is connected to the excitation pressure sensor through the signal conversion module.

[0022] The expansion link 2 includes a first connecting end 21, a mounting section 22, a cylindrical section 26, a limiting section 23 and a second connecting end 27 which are connected in sequence; the stop block 1 is fixed to the mounting section 22, and a plurality of expansion links 2 can be arranged on the mounting frame 5, wherein the second connecting end 27 of one of the expansion links 2 can be inserted into the expansion groove 211 of the first connecting end 21 of another of the expansion links 2.

[0023] In an embodiment of the present invention, the expansion link 2 is expandable and can be used to set multiple installation and fixing positions on the mounting frame 5, and the expansion link 2 that is first connected in sequence can operate in a linked manner, so that the first detection device 9 can be used to detect the installation and fixing status of multiple devices. When there is a specific need to install other monitoring equipment on the truck, the monitoring equipment can be set on one side of the truck overload parking device 4.

[0024] The cylindrical section 26 of the expansion link 2 is supported in the arc groove 32 of the bracket 3, and the bracket 3 is fixedly connected to the mounting frame 5 via a fixing portion 31; the expansion link 2 can rotate in the bracket 3 via the cylindrical section 26 to achieve the switching of the stop block 1 between a locked state and a released state; a second detection device 33 is also provided on the bracket 3, and the installation state of the stop block 1 and the expansion link 2 is detected by the second detection device 33.

[0025] In order to prevent the carrier from dismantling the truck overload parking device 4, a second detection device 33 is provided on the ear 3 near the stop block 1, which can detect whether there is an object entering the space of the stop block 1, and can prevent the violent dismantling and damage of the stop block 1 after installation. Specifically, the second detection device 33 is provided on the side of the ear 3, and the second detection device 33 is provided toward the stop block 1, and the second detection device 33 can be an infrared transmitting / receiving device. A plurality of ears 3 can be arranged side by side on the mounting frame 5, and the ears 3 are arranged according to the number of connections of the expansion link 2, so that the state of the stop block 1 on each expansion link 2 can be detected respectively by the second detection device 33 on the ear 3.

[0026] The stop block 1 is fixed to the mounting section 22 of the expansion link 2 through a fixing assembly 12, and a lock tongue block 11 is hingedly provided on the fixing assembly 12 through a rotating shaft 13; a torsion spring 14 is sleeved on the rotating shaft 13, and the two ends of the torsion spring 14 respectively abut the lock tongue block 11 and the fixing assembly 12; when the truck overload parking device 4 is installed, the bottom of the truck overload parking device 4 can push the lock tongue block 11 to rotate toward a first direction relative to the fixing assembly 12, so that the lock tongue block 11 enters the limiting groove 41 on the side of the truck overload parking device 4; the lock tongue block 11 cannot rotate in a direction opposite to the first direction relative to the fixing assembly 12, so as to provide locking for the limiting groove 41.

[0027] Specifically, Figure 4 As shown, the truck overload parking device 4 moves downward to be installed in place, wherein the first direction is Figure 4The locking tongue block 11 can rotate downward relative to the fixing assembly 12, and the locking tongue block 11 cannot rotate upward relative to the fixing assembly 12, so that after the truck overload parking device 4 is installed in place downward, the limiting groove 41 on the side of the truck overload parking device 4 will be blocked by the locking tongue block 11 when it moves upward.

[0028] The fixing assembly 12 includes a fixing seat 121 and a fixing plate 122, the upper fixing groove 1221 of the fixing plate 122 and the lower fixing groove 1211 of the fixing seat 121 are clamped with the mounting section 22 of the expansion connecting rod 2; the fixing plate 122 and the fixing seat 121 are fixedly connected via screw holes 1222 and bolts; a hinge seat 1212 is also provided on the fixing assembly 12, the rotating shaft 13 is passed through the hinge seat 1212, and an installation space for accommodating a torsion spring 14 is provided in the hinge seat 1212; an abutment portion 111 with an arc-shaped cross-section is provided on the lock tongue block 11, and the lock tongue block 11 is connected to the rotating shaft 13 on the hinge seat 1212 via the hinge portion 112.

[0029] Specifically, the cross section of the mounting section 22 of the extension link 2 is a non-circular structure such as a square, triangle or hexagon. The above cross-sectional shape setting can prevent the fixing assembly 12 from rotating relative to the mounting section 22 after the fixing assembly 12 is installed on the fixing section 22. One end of the torsion spring 14 is inserted into the limiting hole of the hinge seat 1212, and the other end of the torsion spring 14 abuts against the inner end surface of the lock tongue block 11. The lock tongue block 11 is a shell-like structure with two sides open, and the hinge seats 1212 are set in the openings on both sides of the lock tongue block 11. After the lock tongue block 11 rotates in the first direction relative to the hinge seat 1212, it is reset by the torsion spring 14, and the inner end surface of the lock tongue block 11 abuts against the upper end surface of the hinge seat 1212, so that the lock tongue block 11 can only rotate in the first direction relative to the hinge seat 1212.

[0030] The operating member 8 is provided with an accommodating portion 80 for accommodating the second connecting end 27 of the expansion link 2; the accommodating portion 80 includes a first end face 81 and a second end face 82 of different depths, and an inclined transition surface is provided between the first end face 81 and the second end face 82; an axial hole 271 is provided in the second connecting end 27 of the expansion link 2, a wheel seat 24 is provided in the axial hole 271, and a roller 25 is provided on the wheel seat 24; the roller 25 rolls on the first end face 81, the second end face 82 and the transition surface.

[0031] Specifically, the accommodating portion 80 includes a first end surface 81 and a second end surface 82 of different depths. Fig.10As shown, after the operating member 8 moves along the guide plate 7, the second connecting end 27 of the expansion link 2 can be inserted into the accommodating portion 80 to different depths, so that after the operating member 8 moves laterally, the expansion link 2 can be translated on the mounting frame 5 along the extension direction of the expansion link 2. Specifically, the first end face 81 and the second end face 82 are planes, and the transition surface is an inclined surface connecting the first end face 81 and the second end face 82. When the operating member 8 is pushed, the inclined surface can push the roller 25, so that the roller 25 moves from the deeper second end face 82 to the first end face 81, and the translation push of the expansion link 2 is realized.

[0032] The guide plate 7 includes a support plate 71 that supports the bottom of the operating member 8, and end limit plates 72 are provided at both ends of the support plate 71, and side limit plates 73 are provided on the side of the support plate 71; the operating member 8 slides on the support plate 71 along the side limit plates 73; when the operating member 8 is in the first position on the guide plate 7, the first end face 81 of the operating member 8 corresponds to the roller 25 of the expansion link 2; when the operating member 8 is in the second position on the guide plate 7, the second end face 82 of the operating member 8 corresponds to the roller 25 of the expansion link 2.

[0033] The limiting plate 6 is fixed to the mounting frame 5, and the expansion link 2 passes through the square groove 61 on the limiting plate 6; the limiting section 23 of the expansion link 2 cooperates with the square groove 61, and when the first end face 81 of the operating member 8 abuts against the roller 25 of the expansion link 2, the limiting section 23 is engaged with the square groove 61, and the square groove 61 limits the rotation of the expansion link 2; when the operating member 8 moves to the second position of the guide plate 7, the expansion link 2 can translate in the square groove 61 to the second end face 82 where the roller 25 abuts against the operating member 8, and at this time, the cylindrical section 26 of the expansion link 2 is in contact with the square groove 61.

[0034] In order to prevent the truck overload parking device 4 from being abnormally removed after installation, the present invention first connects the required number of expansion links 2 in place when in use, operates the operating member 8 in the first position of the guide plate 7, such as Figure 6In the position shown, the first end face 81 of the operating member 8 abuts against the roller 25 of the expansion link 2, so that the limiting section 23 of the expansion link 2 is clamped in the square groove 61 of the limiting plate 6, so that the square groove 61 of the limiting plate 6 limits the rotation of the expansion link 2, and the truck overload parking device 4 is placed in the installation position of the mounting frame 5. The lower end of the truck overload parking device 4 pushes the abutment portion 111 of the lock tongue block 11 and makes the lock tongue block 11 rotate relative to the fixing component 12, and makes the lock tongue block 11 enter the limiting groove 41 of the truck overload parking device 4, and the lock tongue block 11 can prevent the truck overload parking device 4 from detaching and play a fixing role. The first detection device 9 works and monitors the position state of the operating member 8, and the second detection device 33 works and monitors whether there is an object entering the working space of the lock tongue block 11 to prevent the lock tongue block 11 of the stop block 1 from being damaged; when the truck overload parking device 4 needs to be maintained and data extracted after the truck is parked, the operating member 8 is moved to the second position on the guide plate 7, such as Figure 5 As shown in the position, the extension link 2 is translated along the extension direction of the extension link 2 so that the roller 25 of the extension link 2 abuts against the second end surface 82 of the operating member 8. At this time, the limiting section 23 of the extension link 2 is separated from the square groove 61 of the limiting plate 6. Figure 7 In the state shown, the cylindrical section 26 of the expansion link 2 is in contact with the square groove 61 of the limit plate 6. At this time, when the truck overload parking device 4 is pulled upward, the limit groove 41 of the truck overload parking device 4 can drive the stop block 1 and the expansion link 2 to rotate as a whole, thereby releasing the limiting effect of the lock tongue block 11 on the limit groove 41 of the truck overload parking device 4.

[0035] A truck overload monitoring and early warning system comprises a first-level security system arranged on the truck body and a second-level security system arranged on the road surface where the truck is traveling. The first-level security system is an overload monitoring mobile intelligent terminal installed on the truck body, comprising an excitation pressure sensor for obtaining the truck load, and a truck overload parking device 4 connecting the excitation pressure sensor and the truck safety braking system; the second-level security system comprises an excitation pressure sensor arranged on the road surface, and a communication module connected to the excitation pressure sensor arranged on the road surface; the communication module obtains a load signal generated by the excitation pressure sensor arranged on the road surface when the truck travels to it, determines whether it is always present and sends a warning signal; the communication module also communicates with the overload monitoring mobile intelligent terminal arranged on the truck body to obtain overload and position information.

[0036] In the first level of protection, if Figure 2 As shown, when the truck is not overloaded, the relay is in the normally closed state, the circuit is energized, and the truck can start and drive normally; when the truck is overloaded, the pressure sensor transmits the overweight signal to the relay, thereby controlling the relay to be normally open, the circuit is in the disconnected state, and power cannot be supplied to the engine normally, so the truck cannot start normally.

[0037] In the second level of protection, if Figure 3 As shown in the figure, the main control board is the Arduino Uno R3 control board which is commonly used in small control. This control board is a microcontroller board based on ATmega328P. It has 14 digital input / output pins (6 of which can be used as PWM output), 6 analog inputs, built-in 16MHz crystal clock, USB connection, power jack, ICSP connector and reset button. It only needs to be connected to the computer via a USB data cable for power supply, program download and data communication. And there are many chip sensors that can be used with it, which is convenient for subsequent development, expansion and maintenance.

[0038] For the weighing module, the pressure sensor is combined with the HX711 chip. The HX711 is a 24-bit A / D converter chip designed for high-precision electronic scales, which can easily realize the conversion between analog and digital quantities. Compared with other chips of the same type, this chip integrates peripheral circuits required by other chips of the same type, including voltage regulator, on-chip clock oscillator, etc., with the advantages of high integration, fast response speed, and strong anti-interference. The cost of the weighing module is reduced, and the performance and reliability of the whole machine are improved. All control signals are driven by pins, and there is no need to program the registers inside the chip. The input selection switch can select channel A or channel B at will, and connect it to the internal low-noise programmable amplifier. The programmable gain of channel A is 128 or 64, and the corresponding full-scale differential input signal amplitude is ±20mV or ±40mV respectively. Channel B has a fixed gain of 32, which is used for system parameter detection. The voltage regulator provided in the chip can directly provide power to the external sensor and the A / D converter in the chip, and no additional analog power supply is required on the system board.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mobile intelligent terminal for monitoring overloaded trucks, comprising an overloaded truck parking device (4), a fixing device for locking the overloaded truck parking device (4), and a first detection device (9) for monitoring the state of the fixing device, characterized in that: The truck overload parking device (4) is installed in a mounting frame (5) on the truck body, and the fixing device is arranged on the mounting frame (5); The fixing device comprises an expansion connecting rod (2) and a stop block (1) arranged on the expansion connecting rod (2), wherein the stop block (1) is capable of preventing the truck overload parking device (4) from detaching from the mounting frame (5); The expansion connecting rod (2) is supported in a support ear (3) mounted on a mounting frame (5); a limit plate (6) is fixed to one end of the mounting frame (5); and the expansion connecting rod (2) is engaged with the limit plate (6); One end of the expansion connecting rod (2) is inserted into the operating member (8), the operating member (8) is arranged on the guide plate (7), the guide plate (7) is fixed on the mounting frame (5), and the first detection device (9) is arranged on one side of the operating member (8).

2. The mobile intelligent terminal for monitoring overloaded trucks according to claim 1 is characterized in that: The truck overload parking device (4) comprises a relay module, a remote control module and a signal conversion module, the normally closed contact terminal NC of the relay module is connected to the truck engine, and the common terminal COM of the relay is connected to the power supply; A remote control module is connected between the power source and the engine, and the relay module is connected to the excitation pressure sensor through the signal conversion module.

3. The mobile intelligent terminal for monitoring overloaded trucks according to claim 2 is characterized in that: The expansion connecting rod (2) comprises a first connecting end (21), a mounting section (22), a cylindrical section (26), a limiting section (23) and a second connecting end (27) which are connected in sequence; The stop block (1) is fixed to the mounting section (22), and a plurality of expansion connecting rods (2) can be arranged on the mounting frame (5), wherein the second connecting end (27) of one of the expansion connecting rods (2) can be inserted into the expansion groove (211) of the first connecting end (21) of another of the expansion connecting rods (2).

4. The mobile intelligent terminal for monitoring overloaded trucks according to claim 3 is characterized in that: The cylindrical section (26) of the expansion connecting rod (2) is supported in the arc-shaped groove (32) of the bracket (3), and the bracket (3) is fixedly connected to the mounting frame (5) via a fixing portion (31); The expansion link (2) can rotate in the bracket (3) via the cylindrical section (26) to achieve the switching of the stop block (1) between a locked state and a released state; The bracket (3) is also provided with a second detection device (33), and the installation status of the stop block (1) and the expansion connecting rod (2) is detected by the second detection device (33).

5. The mobile intelligent terminal for monitoring overloaded trucks according to claim 4 is characterized in that: The stop block (1) is fixed to the mounting section (22) of the expansion connecting rod (2) via a fixing assembly (12); a locking tongue block (11) is hingedly provided on the fixing assembly (12) via a rotating shaft (13); A torsion spring (14) is sleeved on the rotating shaft (13), and two ends of the torsion spring (14) respectively abut against the locking tongue block (11) and the fixing assembly (12); When the truck overload parking device (4) is installed, the bottom of the truck overload parking device (4) can push the locking tongue block (11) to rotate relative to the fixing assembly (12) toward a first direction, so that the locking tongue block (11) enters the limiting groove (41) on the side of the truck overload parking device (4); The locking tongue block (11) cannot rotate relative to the fixing assembly (12) in a direction opposite to the first direction, so as to lock the limiting groove (41).

6. The mobile intelligent terminal for monitoring overloaded trucks according to claim 5 is characterized in that: The fixing assembly (12) comprises a fixing seat (121) and a fixing plate (122), wherein an upper fixing groove (1221) of the fixing plate (122) and a lower fixing groove (1211) of the fixing seat (121) are clamped with the mounting section (22) of the expansion connecting rod (2); The fixing plate (122) is fixedly connected to the fixing seat (121) via screw holes (1222) and bolts; The fixing assembly (12) is further provided with an articulated seat (1212), the rotating shaft (13) is inserted into the articulated seat (1212), and an installation space for accommodating a torsion spring (14) is provided in the articulated seat (1212); The locking tongue block (11) is provided with an abutment portion (111) with an arc-shaped cross section, and the locking tongue block (11) is connected to a rotating shaft (13) on a hinge seat (1212) via a hinge portion (112).

7. The mobile intelligent terminal for monitoring overloaded trucks according to claim 6 is characterized by: The operating member (8) is provided with a receiving portion (80) for receiving the second connecting end (27) of the expansion connecting rod (2); The accommodating portion (80) comprises a first end surface (81) and a second end surface (82) of different depths, and an inclined transition surface is provided between the first end surface (81) and the second end surface (82); An axial hole (271) is provided in the second connecting end (27) of the expansion connecting rod (2), a wheel seat (24) is provided in the axial hole (271), and a roller (25) is provided on the wheel seat (24); The roller (25) rolls on the first end surface (81), the second end surface (82) and the transition surface.

8. The mobile intelligent terminal for monitoring overloaded trucks according to claim 7 is characterized in that: The guide plate (7) comprises a support plate (71) supporting the bottom of the operating member (8), end limit plates (72) are provided at both ends of the support plate (71), and side limit plates (73) are provided on the side of the support plate (71); The operating member (8) slides on the supporting plate (71) along the side limiting plate (73); When the operating member (8) is in the first position on the guide plate (7), the first end surface (81) of the operating member (8) corresponds to the roller (25) of the expansion connecting rod (2); When the operating member (8) is in the second position on the guide plate (7), the second end surface (82) of the operating member (8) corresponds to the roller (25) of the expansion connecting rod (2).

9. The mobile intelligent terminal for monitoring overloaded trucks according to claim 8, characterized in that: The limiting plate (6) is fixed to the mounting frame (5), and the expansion connecting rod (2) passes through the square groove (61) on the limiting plate (6); The limiting section (23) of the expansion connecting rod (2) cooperates with the square groove (61), and when the first end surface (81) of the operating member (8) abuts against the roller (25) of the expansion connecting rod (2), the limiting section (23) is engaged with the square groove (61), and the square groove (61) limits the rotation of the expansion connecting rod (2); When the operating member (8) moves to the second position of the guide plate (7), the expansion link (2) can translate in the square groove (61) until the roller (25) abuts against the second end surface (82) of the operating member (8), and at this time, the cylindrical section (26) of the expansion link (2) contacts the square groove (61).

10. A truck overload monitoring and early warning system, comprising a first level security system arranged on the truck body and a second level security system arranged on the road surface on which the truck is traveling, characterized in that: The first security system is an overload monitoring mobile intelligent terminal as claimed in any one of claims 1 to 9 installed on the truck body, comprising an excitation pressure sensor for obtaining the truck load, and a truck overload parking device (4) connected to the excitation pressure sensor and the truck safety brake system; The second security system includes an excitation pressure sensor disposed on the road surface, and a communication module connected to the excitation pressure sensor disposed on the road surface; The communication module obtains the load signal generated by the excitation pressure sensor set on the road surface when the truck travels to it, determines whether it is always present and sends a warning signal; The communication module also communicates with an overload monitoring mobile intelligent terminal arranged on the truck body to obtain overload and location information.

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