Novel pre-weighing device

Abstract

The utility model relates to weighing equipment technical field, concretely provides a kind of novel pre-weighing device, including DC-DC power module, laser displacement sensor, liquid crystal display table, still have display circuit and prompt circuit;Laser displacement sensor is installed on the upper end of steel plate spring;Display circuit, control circuit, DC-DC power module, liquid crystal display table are installed in shell and are electrically connected, shell is installed on truck.The utility model is loaded after vehicle container, is influenced by the weight of goods in container, under the joint action of relevant mechanism, can be according to the weight of the goods loaded in vehicle and the weight of the steel plate spring that the goods loaded in vehicle act on the lower end steel plate spring, steel plate spring stress deformation is regarded as weighing data, real-time display the weight of the goods loaded in container, and when exceeding the weight threshold of vehicle transport goods, can timely prompt driver to stop loading, thus bring the convenience to driver, reduce transportation cost, with good application prospect.

Description

Technical Field

[0001] This utility model relates to the field of weighing equipment technology, and in particular to a novel pre-weighing device. Background Technology

[0002] Overloading refers to a vehicle's load capacity exceeding its maximum carrying capacity, commonly seen in trucks and buses. The negative impacts of overloading are as follows: (1) Overloading will cause great harm to the healthy development of the transportation market and completely destroy the basic price formation system of the transportation market.

[0003] (2) Overloaded vehicles often drive at low gear and high throttle in order to obtain greater traction power. This results in incomplete combustion of engine fuel, excessive exhaust emissions, excessive noise, and serious pollution of the atmospheric environment.

[0004] (3) Overloading in logistics transportation also seriously affects the safety of drivers. For every ton of overload, the braking distance increases by one meter. In case of an emergency, improper handling can lead to traffic accidents.

[0005] (4) Overloading the vehicle will cause the engine to overheat, leading to faster wear of parts, excessive fuel consumption, and tire pressure exceeding the rated load, which can easily cause tire blowout.

[0006] (5) Overloaded vehicles have excessive total mass, which increases the pressure on the road surface, the friction generated by braking, and the centrifugal force during turning, thereby increasing the degree of damage to the road surface caused by friction and crushing.

[0007] (6) Overloading a vehicle will reduce its braking and steering performance. Due to the multiple increase in total load, the acceleration ability will be reduced, the braking effect on slopes will be weakened, the turning sensitivity will be reduced, and the potential for accidents such as unqualified braking, slipping on slopes, and tire blowouts will be increased.

[0008] In actual transportation, to prevent the hazards caused by overloaded trucks and to avoid being penalized by relevant departments, many drivers weigh the goods they transport. In the current technology, for goods that are not marked with their own weight (such as scrap steel, river sand, etc.); if the goods are marked with their weight, the driver or the person shipping the goods will weigh them for convenience. After loading, the driver usually drives the vehicle onto a weighbridge for weighing. If the load is overloaded, the driver needs to return to the freight yard to unload the goods; if the load is underloaded, the driver needs to return to the freight yard to load the goods. Therefore, the above weighing method will cause inconvenience to the driver and increase the transportation cost accordingly. In summary, it is particularly necessary to provide a device that can easily perform pre-weighing. Utility Model Content

[0009] To overcome the shortcomings of existing trucks and other vehicles in loading goods due to the lack of suitable weighing equipment, as described in the background art, this utility model provides a new type of pre-weighing device that is simple in structure and low in cost compared to weighbridges. Under the joint action of related mechanisms, it can display the weight of the goods loaded in the cargo box in real time based on the weight of the goods acting on the leaf springs at the bottom of the cargo box and the deformation of the leaf springs under stress. Furthermore, it can promptly remind the driver to stop loading when the weight threshold of the goods exceeds the vehicle's transport weight, thereby bringing convenience to the driver and reducing transportation costs.

[0010] The technical solution adopted by this utility model to solve its technical problem is: A novel pre-weighing device includes a DC-DC power module, a laser displacement sensor, and an LCD display, and also features a display circuit and a prompting circuit. The lower end of the housing of the laser displacement sensor is fixedly mounted on the upper end of one of the leaf springs under the cargo box of a truck. The display circuit, control circuit, DC-DC power module, and LCD display are installed inside the housing, which is mounted on the truck. The power input terminal of the DC-DC power module is electrically connected to the two terminals of the battery on the truck, and the power output terminal of the DC-DC power module is electrically connected to the power input terminals of the laser displacement sensor and the prompting circuit. The signal output terminal of the laser displacement sensor is electrically connected to the signal input terminals of the prompting circuit and the display circuit. The power output terminal of the display circuit is electrically connected to the power input terminal of the LCD display.

[0011] Furthermore, the probe of the laser displacement sensor is located at the upper end, aligned with the lower side of the cargo box.

[0012] Furthermore, the lower end of the housing of the laser displacement sensor is fixedly installed on the upper part of the uppermost leaf spring of the leaf spring assembly.

[0013] Furthermore, the housing of the laser displacement sensor can also be fixedly installed on the lower part of the lowest leaf spring of the leaf spring assembly, with the probe of the laser displacement sensor located at the lower part and facing the ground.

[0014] Furthermore, the liquid crystal display can be a voltmeter, or it can be a weight display based on voltage signal control.

[0015] Furthermore, the display circuit includes an electrically connected resistor and an adjustable resistor, with one end of the adjustable resistor connected to the resistor.

[0016] Furthermore, the prompting circuit includes an electrically connected buzzer, an adjustable resistor, a resistor, and a transistor. One end of the adjustable resistor is connected to one end of the first resistor and one end of the second resistor. The other end of the second resistor is connected to the base of the transistor. The collector of the transistor is connected to the negative power input terminal of the buzzer. The other end of the first resistor is connected to the emitter of the transistor.

[0017] Furthermore, the knob of the adjustable resistor is located outside the housing, and the housing around the handle of the adjustable resistor is marked with numbers representing weight data.

[0018] Compared with existing technologies, the advantages of this utility model are: This utility model has the advantages of simple structure and low cost compared to traditional weighbridges, and can be used for displaying the loading weight of trucks. After the truck's cargo box is loaded, the weight of the cargo causes the vehicle's leaf spring assembly to shift upwards (except for the fixed positions at the front and rear ends of the leaf springs). When the weight is heavy, the distance between the laser displacement sensor's probe and the lower outer edge of the cargo box decreases; conversely, the distance is larger. Thus, under the combined action of related mechanisms, the weight of the cargo acting on the lower leaf springs of the cargo box and the deformation of the leaf springs are used as weighing data to display the real-time weight of the cargo loaded in the cargo box. Furthermore, when the weight exceeds the vehicle's transport weight threshold, it can promptly prompt the driver to stop loading, thereby providing convenience to the driver and reducing transportation costs. In summary, this utility model has good application prospects. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of the utility model and the leaf spring assembly for trucks.

[0021] Figure 2 This is the circuit diagram of this utility model. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Figure 1 , Figure 2As shown, the novel pre-weighing device includes a DC-DC power module W1, a laser displacement sensor W2, and an LCD display V, and also has a display circuit 1 and a prompting circuit 2; the lower end of the housing of the laser displacement sensor W2 is glued to the upper front middle of one of the leaf springs in the leaf spring assembly 3 under the cargo box of the truck; the display circuit 1, control circuit 2, DC-DC power module W1, and LCD display V are installed inside the housing 4, and the display screen of the LCD display V is located outside the front end of the housing 4, which is mounted on the cab of the truck.

[0024] Figure 1 , Figure 2 As shown, the probe of the laser displacement sensor W2 is positioned at the top, aligned with the lower side of the cargo box. The lower end of the housing of the laser displacement sensor W2 is fixedly mounted on the uppermost leaf spring of the leaf spring assembly 3. The housing of the laser displacement sensor W2 can also be fixedly mounted on the lower part of the lowermost leaf spring of the leaf spring assembly 3, with the probe of the laser displacement sensor W2 positioned at the bottom, aligned with the ground. The LCD display V is a voltmeter, and can also be a weight display based on voltage signal control. The display circuit includes a resistor R1 and an adjustable resistor RP1 connected via circuit board wiring, with one end of the adjustable resistor RP1 connected to one end of the resistor R1. The indicator circuit includes a buzzer BT, an adjustable resistor RP2, resistors R2 and R3, and a transistor T1, all connected via circuit board wiring. One end of the adjustable resistor RP2 is connected to one end of the first resistor R2 and one end of the second resistor R3. The other end of the second resistor R3 is connected to the base of the transistor T1. The collector of the transistor T1 is connected to the negative power input terminal of the buzzer BT. The other end of the first resistor R2 is connected to the emitter of the transistor T1. The knob for the adjustable resistor RP2 is located outside the opening at the lower front of the housing. Numerous markings representing weight data are found around the handle of the adjustable resistor RP2.

[0025] Figure 1 , Figure 2 As shown, the power input terminals 1 and 2 of the DC-DC power module W1 are connected to the two poles of the battery G1 on the truck via wires. The power output terminals 3 and 4 of the DC-DC power module W1 are connected to the power input terminals 1 and 2 of the laser displacement sensor W2, the power input terminal of the prompting circuit, the positive power input terminal of the buzzer BT, and the emitter of the transistor T1 via wires. The signal output terminal 3 of the laser displacement sensor W2 is connected to the other end of the signal input resistor R1 of the prompting circuit and the other end of the signal input adjustable resistor RP2 of the display circuit via wires with sufficient length. One end of the power output resistor R1 of the display circuit and the other end of the adjustable resistor RP1 are connected to the power input terminal of the LCD display V via wires.

[0026] Figure 1 , Figure 2As shown, this utility model has the advantages of simple structure and low cost compared to a weighbridge, and can be used as a truck loading weight display. The power output from the battery G1 enters the power input terminals 1 and 2 of the DC-DC power module W1. The DC-DC power module W1 outputs a stable 12V DC power supply through pins 3 and 4, which then enters the power input terminals of the indicator circuit and the laser displacement sensor W2. The laser displacement sensor W2 and the indicator circuit are then powered on. After the vehicle's cargo box is loaded, the weight of the cargo causes the vehicle's leaf spring assembly 3 to shift upwards (except for the hinged fixed positions at the front and rear ends of the leaf springs). When the weight is heavy, the leaf spring assembly 3 causes the probe of the laser displacement sensor W2 to move upwards and the distance between the probe and the lower end of the cargo box decreases; conversely, the distance between the probe of the laser displacement sensor W2 and the lower end of the cargo box is larger. When the distance between the laser displacement sensor W2 and the bottom of the cargo box is relatively large, its output voltage signal is relatively low; when the distance between the laser displacement sensor W2 and the bottom of the cargo box is relatively small, its output voltage signal is relatively high. The voltage signal output by the laser displacement sensor W2 is divided by the adjustable resistor RP1 and the resistor R1 and then enters the voltmeter V. The greater the weight of the cargo in the cargo box, the larger the number representing the weight displayed on the voltmeter, and vice versa. (For example, if the voltmeter displays a value of 04.05V, it means that the weight of the cargo box and the cargo is 40.5 tons; if the voltmeter displays a value of 006.5V, it means that the weight of the cargo box and the cargo is 6.5 tons.) The driver can obtain the actual weight of the cargo loaded in the cargo box by subtracting the known weight of the cargo box from the observed weight data. Specifically, this application can also use a weight display based on voltage signal control, making the displayed data more intuitive. In this embodiment, when no suitable weight display is available (to better illustrate the working principle of this invention, a voltmeter is used in this embodiment), a liquid crystal voltmeter can be used to display the weight. During initial production, based on the known weight inside the cargo box, technicians adjust the resistance value of the adjustable resistor RP1 to the left or right. When the voltmeter reading matches the weight of the cargo box and the goods (for example, if the actual weight is 50 tons, the voltmeter reading is 05.00V), the adjustment requirement is met. Then, technicians measure the resistance value of the adjustable resistor RP1 at this time. For subsequent mass production, a fixed resistor with the same resistance value can be used instead of the adjustable resistor.

[0027] Figure 1 , Figure 2As shown, the driver of this new type can also set a weight threshold for the cargo in the cargo box. Specifically, the driver adjusts the handle of the adjustable resistor RP2 to the corresponding number (e.g., 32 tons) based on the numbers representing weight data marked around the handle of the adjustable resistor RP2. After the voltage signal output from pin 3 of the laser displacement sensor W2 enters the other end of the adjustable resistor RP2, when the weight of the cargo in the cargo box does not exceed the weight threshold set by the driver, the voltage signal output from pin 3 of the laser displacement sensor W2 is relatively low. This voltage signal is divided by the adjustable resistor RP2 and resistor R2, and the current is limited by resistor R3 to enter the base of transistor T1, which is lower than the 0.7V starting voltage of transistor T1. Transistor T1 will not conduct, indicating that the cargo in the cargo box is not overweight. When the weight of the cargo in the cargo box exceeds the weight threshold set by the driver, the voltage signal output from pin 3 of the laser displacement sensor W2 is relatively high. This voltage signal is divided by adjustable resistors RP2 and R2, and then reduced and current-limited by resistor R3 before entering the base of transistor T1. The voltage is higher than the 0.7V starting voltage of transistor T1, causing transistor T1 to conduct and output a low-level signal to the negative power input terminal of the buzzer BT. The buzzer BT then sounds, indicating that the cargo in the cargo box is overloaded. By setting the buzzer BT to sound when the cargo is overloaded, the driver is alerted if they are not in the vehicle and are not checking the LCD display for weight data. This prompts the loading personnel to stop loading the cargo box, effectively preventing overloading.

[0028] Figure 1 , Figure 2 As shown, through the above technical solution, this new type of vehicle can use the weight of the cargo loaded on the lower end of the vehicle's cargo box and the deformation of the leaf spring as weighing data to display the weight of the cargo loaded in the cargo box in real time. Furthermore, when the weight exceeds the vehicle's transport weight threshold, it can promptly prompt the driver to stop loading, thus providing convenience to the driver and reducing transportation costs. It should be noted that this new type of vehicle monitors only one side of the lower end of the cargo box. Compared to weighbridges, there is some error in accuracy. The driver can obtain error data by weighing the cargo on a weighbridge after the first few loads (without using a weighbridge afterwards). This error data can then be used to monitor the loading of the cargo box (for example, if the weight measured by this new type of vehicle is less than 120 kg compared to the weighbridge, loading can be stopped when the weight is less than the set loading weight; conversely, if the weight measured by this new type of vehicle is more than 120 kg compared to the weighbridge, loading can be stopped when the weight exceeds the set loading weight). Loading can be stopped once the actual weight is reached, thus achieving a more accurate effect in preventing overloading. Figure 2In the diagram, the DC-DC power module W1 is a finished product of a 24V DC to 12V DC power module (input 24V-36V, output 0-12V continuously adjustable); resistors R1, R2, and R3 have resistance values ​​of 4.7K, 8K, and 1K respectively; transistor T1 is a 9013 (NPN type); adjustable resistors RP1 and RP2 have a resistance value of 47K (adjustable resistor RP1 to 7.8K); the LCD display V is a four-digit LCD voltage display meter with a range of 24V DC; the laser displacement sensor W2 is model KG01-400N, which has two power input terminals and one external... The device has one input control terminal (left floating in this embodiment), one control output terminal (left floating in this embodiment), one analog voltage signal output terminal, and one shielded wiring terminal (grounded, specifically connected to the emitter of transistor T1). During operation, the closer the probe of the laser displacement sensor W2 is to the object, the higher the voltage signal output from the analog voltage signal output terminal; the farther the probe of the laser displacement sensor W2 is from the object, the lower the voltage signal output from the analog voltage signal output terminal. The detection distance is 200-600mm. The BT buzzer is an active continuous high-decibel buzzer product with model XF12V.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A new pre-weighing device, characterized in that, It includes a DC-DC power module, a laser displacement sensor, an LCD display, and also features a display circuit and a prompting circuit. The lower end of the housing of the laser displacement sensor is fixedly installed on the upper end of one of the leaf springs under the cargo box of the truck; the display circuit, control circuit, DC-DC power module, and LCD display are installed inside the housing, and the housing is installed on the truck. The power input terminal of the DC-DC power module is electrically connected to the two poles of the battery on the truck, the power output terminal of the DC-DC power module is electrically connected to the power input terminal of the laser displacement sensor and the prompting circuit, and the signal output terminal of the laser displacement sensor is electrically connected to the signal input terminal of the prompting circuit and the display circuit. The power output terminal of the display circuit and the power input terminal of the liquid crystal display are electrically connected.

2. The novel pre-weighing device according to claim 1, characterized in that, The probe of the laser displacement sensor is located at the top, aligned with the lower side of the cargo box.

3. The novel pre-weighing device according to claim 1, characterized in that, The lower end of the housing of the laser displacement sensor is fixedly installed on the upper part of the top leaf spring of the leaf spring assembly.

4. The novel pre-weighing device according to claim 1, characterized in that, The housing of the laser displacement sensor can also be fixedly installed on the lower part of the lowest leaf spring of the leaf spring assembly, with the probe of the laser displacement sensor located at the bottom and facing the ground.

5. The novel pre-weighing device according to claim 1, characterized in that, The LCD display meter is a voltmeter, and it can also be a weight display meter controlled by a voltage signal.

6. The novel pre-weighing device according to claim 1, characterized in that, The display circuit includes an electrically connected resistor and an adjustable resistor, with one end of the adjustable resistor connected to the resistor.

7. The novel pre-weighing device according to claim 1, characterized in that, The prompting circuit includes an electrically connected buzzer, an adjustable resistor, a resistor, and a transistor. One end of the adjustable resistor is connected to one end of the first resistor and one end of the second resistor. The other end of the second resistor is connected to the base of the transistor. The collector of the transistor is connected to the negative power input terminal of the buzzer. The other end of the first resistor is connected to the emitter of the transistor.

8. The novel pre-weighing device according to claim 7, characterized in that, The knob for the adjustable resistor is located on the outside of the housing, and the housing around the handle of the adjustable resistor is marked with numbers representing weight data.

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