CN211740369U - Super long-distance truck weighing and measuring device - Google Patents

Abstract

The utility model provides a super remote truck measuring device that weighs. The device includes: the system comprises a wireless laser displacement sensor and a handheld mobile terminal; the wireless laser displacement sensor includes: the device comprises a laser displacement sensor, an operational amplifier circuit, an acceleration sensor, an LORA communication module and a processor; the laser displacement sensor is connected with the input end of the operational amplification circuit, the output end of the operational amplification circuit and the acceleration sensor are both connected with the processor, and the processor is in communication connection with the handheld mobile terminal through the LORA communication module. The utility model improves the weighing efficiency by integrating the acceleration sensor without manual observation or multiple correction of the wireless laser displacement sensor; the method can effectively filter the measurement data in the non-static state, avoid the occurrence of false alarm and false alarm, and improve the measurement accuracy. Through integrated LORA communication module, use the LORA wireless communication mode to solve the super long-range communication problem, be applicable to large-scale freight yard, need not establish communication network, effective reduce cost.

Description

Super long-distance truck weighing and measuring device

Technical Field

The utility model relates to a freight train technical field that weighs especially relates to an ultra-long distance freight train measuring device that weighs.

Background

At present, the goods of the railway wagon are generally weighed by adopting a rail weighbridge. The measuring part of the rail weighbridge is a weighing platform. The during operation, pull boxcar to park on the weighing platform, carriage weight effect makes the elastomer produce elastic deformation on the weighing platform elastomer, glues the resistance strain gauge on the elastomer and also takes place deformation, and then produces the resistance value change, changes the change of resistance value into voltage variation and output through measuring circuit, and then obtains the weighing value. However, the construction of the rail weighbridge has higher requirements on the environment, and the sensitivity of the weighing platform sensor is not high; and once the overload or unbalance loading condition appears, the locomotive is required to send the carriage back to the platform for unloading and adjusting the load, and the adjusted carriage is dragged to the rail balance weight for re-detection, thereby wasting time and energy.

In addition, there is also a portable measuring device that uses a laser sensor and a mobile terminal to perform truck weighing, but there are also the following problems: (1) when the deformation of the bogie spring is small, if the deformation distance measured by the laser sensor has an error, the error of the measurement result is amplified even if the error is small. Although some manufacturers integrate the gradienter, the gradienter needs to be manually calibrated before measurement, so that the weighing efficiency is influenced; in addition, truck shocks during testing can also cause the sensors to require recalibration. (2) The sensor and the mobile terminal cannot realize long-distance communication transmission, and for a large goods yard, the distance between the sensor and the mobile terminal can often reach more than 1 kilometer, so that the sensor and the mobile terminal cannot be applied to the goods yard with a large area.

Disclosure of Invention

The weighing inefficiency that exists to current freight train weighing measurement device, be difficult for buildding, the limited problem of communication transmission distance, the utility model provides a super remote freight train weighing measurement device.

The utility model provides a pair of super remote truck measuring device that weighs, include: the system comprises a wireless laser displacement sensor and a handheld mobile terminal; the wireless laser displacement sensor includes: the device comprises a laser displacement sensor, an operational amplifier circuit, an acceleration sensor, an LORA communication module and a processor;

the laser displacement sensor is connected with the input end of the operational amplifier circuit, the output end of the operational amplifier circuit and the acceleration sensor are both connected with the processor, and the processor is in communication connection with the handheld mobile terminal through the LORA communication module.

Further, the laser displacement sensor adopts a CMOS laser displacement sensor.

Further, the acceleration sensor adopts a three-axis digital acceleration sensor.

Further, the LORA communication module employs an SX1788 wireless transceiver.

Further, the processor adopts an STM8L151C8T6 singlechip.

The utility model has the advantages that:

(1) the ultra-long distance truck weighing and measuring device provided by the embodiment of the utility model has the advantages that the wireless laser displacement sensor is not required to be manually observed or corrected for many times through the integrated acceleration sensor inside the wireless laser displacement sensor, so that the weighing efficiency is improved; in addition, the acceleration sensor can also effectively filter the measurement data in a non-static state, thereby avoiding the occurrence of false alarm and false alarm conditions and improving the measurement accuracy.

(2) The embodiment of the utility model provides a super remote truck weighing and measuring device uses LORA wireless communication mode to solve super remote communication problem through integrated LORA communication module inside the wireless laser displacement sensor, is applicable to large-scale freight yard, need not establish communication network, effective reduce cost.

Drawings

Fig. 1 is a schematic view of a measurement principle of a super-long-distance truck weighing and measuring device provided by an embodiment of the present invention;

fig. 2 is a block diagram of a wireless laser displacement sensor according to an embodiment of the present invention;

fig. 3 is a schematic view of an included angle between a laser irradiation direction and a gravity direction provided by an embodiment of the present invention;

reference numerals: 1 is the support, 2 is the burden thing, 3 is the spring frame, 4 are wireless laser displacement sensor, 5 are handheld mobile terminal.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following description will clearly describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Combine fig. 1 and fig. 2 to show, the embodiment of the utility model provides an extra-long distance freight train weighing and measuring device, include: the system comprises a wireless laser displacement sensor 4 and a handheld mobile terminal 5; the wireless laser displacement sensor 4 includes: the device comprises a laser displacement sensor, an operational amplifier circuit, an acceleration sensor, an LORA communication module and a processor;

the laser displacement sensor is connected with the input end of the operational amplification circuit, the output end of the operational amplification circuit and the acceleration sensor are both connected with the processor, and the processor is in communication connection with the handheld mobile terminal 5 through the LORA communication module.

Specifically, when the measuring device in this embodiment is used, as shown in fig. 1, the wireless laser displacement sensor 4 is only required to be attracted to a certain horizontal bracket 1 of the truck to be measured, so that the laser emitted by the wireless laser displacement sensor irradiates the surface of the truck spring frame 3 below the horizontal bracket 1 as vertically as possible.

The measuring principle of the super-long distance truck weighing and measuring device in the embodiment is as follows: the distance information from the surface of the truck spring frame 3 to the laser head is obtained through a laser displacement sensor, and because the distance information belongs to an analog voltage signal, the analog voltage signal needs to be subjected to impedance conversion through an operational amplifier circuit and then is output to an ADC pin of a single chip microcomputer; acquiring attitude information of the wireless laser displacement sensor 4 through an acceleration sensor; the processor calculates the height transformation quantity of the truck spring frame 3 according to the distance information and the posture information, and calculates the weight of the goods according to the height transformation quantity and the deformation coefficient of the truck spring frame 3; then, the weight of the goods is sent to the handheld mobile terminal 5 through the LORA communication module, and the user can check the weight of the goods through the handheld mobile terminal 5.

As shown in fig. 3, because when installing wireless laser displacement sensor 4, can not guarantee that the sensor laser point shines completely vertically downwards, if can not shine completely vertically downwards, then can cause laser irradiation direction and gravity direction to have an contained angle, consequently acquire the gesture information of sensor self through acceleration sensor, and then can acquire the contained angle theta of laser irradiation direction and gravity direction, thereby can rectify the distance information that laser displacement sensor acquireed, so when calculating the high variation of freight train spring bracket 3, can reduce the error, improve the measurement accuracy of goods weight.

In addition, in the measuring process, the truck is easy to vibrate, and the vibration of the truck can also cause that the laser point of the wireless laser displacement sensor 4 cannot be completely vertically irradiated downwards, so that distance information and attitude information at corresponding moments can be continuously acquired for multiple times (for example, the distance information and the attitude information can be acquired every 0.5 second) through a processor, then included angles theta between multiple laser irradiation directions and the gravity direction are obtained through calculation, whether the values of the included angles of two adjacent times are equal or not is compared, if the values are not equal, the possibility of vibration generation is indicated, and the measuring result is inaccurate; if the included angles are equal, the wireless laser displacement sensor 4 is not vibrated, and a measurement result can be output.

The wireless laser displacement sensor 4 and the handheld mobile terminal 5 are communicated by an LORA communication module, and the communication distance in an open area can be more than or equal to 2 Km. And the communication of the LORA communication module can be used for carrying out various connection modes such as point-to-point, single-point-to-multipoint, multipoint networking and the like, so that the system is very suitable for application of multi-node remote data acquisition and the like.

Through the LORA communication protocol and the frequency band setting, theoretically, one handheld mobile terminal 5 can receive 32 (the number of frequency points) × 256 (the number of node IDs supported by one channel) =8192 data uploads of the wireless laser displacement sensor 4. Preferably, considering network congestion and inter-node interference, one handheld mobile terminal 5 supports a maximum of 32 wireless laser displacement sensors 4 to upload data simultaneously.

As an implementation mode, the laser displacement sensor adopts a CMOS laser displacement sensor. For example, a micro CMOS laser displacement sensor manufactured by Nippon Song and having a model number HG-C1100 is used. The acceleration sensor adopts a three-axis digital acceleration sensor. For example, a three-axis digital acceleration sensor model ADXL362 manufactured by ADI is used. The LORA communication module employs an SX1788 wireless transceiver. The processor adopts STM8L151C8T6 singlechip.

In addition, the wireless laser displacement sensor 4 further comprises a power circuit for supplying power to the processor and an indicator light circuit for indicating the working state of the wireless laser displacement sensor 4. The power supply circuit includes a lithium battery charging circuit and a booster circuit. The indicating lamp circuit comprises 2 red and green LED lamps.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (5)

1. An ultra-long distance truck weighing and measuring device, comprising: the system comprises a wireless laser displacement sensor and a handheld mobile terminal; the wireless laser displacement sensor includes: the device comprises a laser displacement sensor, an operational amplifier circuit, an acceleration sensor, an LORA communication module and a processor;

the laser displacement sensor is connected with the input end of the operational amplifier circuit, the output end of the operational amplifier circuit and the acceleration sensor are both connected with the processor, and the processor is in communication connection with the handheld mobile terminal through the LORA communication module.

2. The device of claim 1, wherein the laser displacement sensor is a CMOS laser displacement sensor.

3. The apparatus of claim 1, wherein the acceleration sensor is a three-axis digital acceleration sensor.

4. The apparatus of claim 1, wherein the LORA communication module employs an SX1788 wireless transceiver.

5. The apparatus of claim 1, wherein the processor employs an STM8L151C8T6 single chip microcomputer.

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