Height limit detection early warning unit based on laser radar and used for refrigerator car

Abstract

The utility model relates to the field of refrigerator car distance measurement based on laser radar, and discloses a height limit detection early warning unit used for a refrigerator car and based on laser radar, which comprises a shell, a laser radar sensor, a processor and an early warning device, and is characterized in that the laser radar sensor is used for measuring the distance between the refrigerator car and a height limit rod; the laser radar sensor, the processor and the early warning device are electrically connected in sequence, the laser radar sensor, the processor and the early warning device are all located in the shell, and the shell is installed outside the front end of a carriage of the refrigerator car. According to the scheme, the laser radar sensor is applied to the refrigerator car, the distance between the refrigerator car and the height limiting rod is conveniently measured, the distance between the refrigerator car and the height limiting rod is accurately obtained in real time, and therefore the safety and efficiency of the refrigerator car are improved.

Description

Technical Field

[0001] The utility model relates to the field of laser radar ranging for refrigerated trucks, and in particular to a laser radar-based height limit detection and early warning unit for refrigerated trucks. Background Art

[0002] With the rapid development of the logistics industry, refrigerated trucks, as an important means of transportation, are of great significance for ensuring the quality and safety of perishable items such as food and medicine. However, traditional refrigerated trucks are prone to safety accidents such as collisions during driving due to the lack of perception and intelligent control of obstacles ahead. Traditional refrigerated trucks are prone to safety accidents such as collisions during driving due to the lack of perception and intelligent control of obstacles ahead. Utility Model Content

[0003] The utility model is intended to provide a height limit detection and early warning unit based on laser radar for refrigerated trucks, so as to solve the problem that refrigerated trucks are prone to safety accidents such as collisions.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a laser radar-based height limit detection and warning unit for refrigerated trucks, comprising: a shell, a laser radar sensor, a processor and an early warning device, the laser radar sensor is used to measure the distance between the pure electric refrigerated truck and the height limit pole, the laser radar sensor, processor and early warning device are electrically connected in sequence, the laser radar sensor, processor and early warning device are all located in the shell, and the shell is installed on the outside of the front end of the refrigerated truck compartment.

[0005] Principle of this solution: The lidar sensor is used to measure the distance between the refrigerated truck and the height limit pole. The processor compares the distance between the refrigerated truck and the height limit pole with the stored warning distance and controls the early warning device to sound an alarm, reminding the driver that the height limit pole is about to be reached, and reminding the driver to stop in time to determine whether he can continue to drive on the current road.

[0006] Beneficial effects of this solution: This solution sets a lidar sensor in the refrigeration machine of a pure electric refrigerated truck. Since the refrigeration machine is set outside the front end of the refrigerated truck compartment, it is convenient to measure the distance between the refrigerated truck and the height limit pole, and obtain the distance between the refrigerated truck and the object in real time and accurately, thereby improving the safety and efficiency of the refrigerated truck; the distance can be used to remind the driver to promptly judge the height of the height limit pole to avoid the vehicle colliding with the height limit pole during driving, causing damage to the height limit pole and the refrigerated truck; an early warning device is set to facilitate prompting the driver; the lidar sensor is set at the front end of the refrigerated truck compartment to facilitate measuring the distance between the refrigerated truck and the height limit pole; the processor can control multiple devices such as the refrigeration machine, reduce the number of controllers of the equipment, and save energy.

[0007] Further defined, it also includes a filter, the filter is connected to the laser radar sensor, and the filter is used to filter the laser beam reflected back by the laser radar sensor. The laser beam reflected back by the laser radar sensor is filtered by the filter to improve the ranging accuracy.

[0008] It is further defined that the filter is a low-pass filter or a band-pass filter.

[0009] It is further defined that the device further includes a display unit, wherein the display unit is electrically connected to the processor.

[0010] It is further defined that the processor includes: a data storage unit, a data processing unit and a data output unit, and the data storage unit and the data output unit are evenly connected to the data processing unit.

[0011] It is further defined that the laser radar sensor includes a laser, a receiver and a time measurement unit, the laser is used to emit a laser beam, the receiver is used to receive a reflected beam, and the time measurement unit is used to measure the emission and reception time of the laser beam.

[0012] It is further defined that the laser is a semiconductor laser or a fiber laser.

[0013] It is further defined that the receiver is a photodiode or an avalanche photodiode.

[0014] Further defined, it also includes a calibrator, the calibrator is connected to the laser radar sensor, and the calibrator is used to calibrate the emission time and reception time of the laser beam of the laser radar sensor. The emission and reception time of the laser beam can be calibrated by the calibrator to eliminate system errors.

[0015] It is further defined that the calibrator is a clock calibrator or a time interval calibrator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the principle diagram of the laser radar ranging detection for refrigerated trucks of the utility model. DETAILED DESCRIPTION

[0017] The following is further described in detail through specific implementation methods:

[0018] Example:

[0019] A laser radar-based height limit detection and warning unit for refrigerated trucks includes: a housing, a laser radar sensor, a processor, and an early warning device. The laser radar sensor is used to measure the distance between the pure electric refrigerated truck and the height limit pole. In this solution, the laser radar sensor is used to measure the horizontal distance between the pure electric refrigerated truck and the height limit pole. The laser radar, processor, and early warning device are electrically connected in sequence. Figure 1 As shown, this solution applies a laser radar sensor to a refrigerated truck to measure the distance between the refrigerated truck and the height limit pole on the road, thereby improving the safety and efficiency of the refrigerated truck; the distance can remind the driver to timely judge the height of the height limit pole to avoid the vehicle colliding with the height limit pole during driving, causing damage to the height limit pole and the refrigerated truck. Among them, the laser radar ranging technology and the technology of the processor to judge and warn the distance measured by the laser radar sensor are existing technologies, and this solution is improved to apply the laser radar ranging technology to pure electric refrigerated trucks. Among them, the laser radar ranging technology specifically refers to the existing technology. Specifically, the laser radar sensor emits a pulse laser with a short duration, which is reflected by the target object after passing the distance to be measured L. The pulse signal sent is received by the laser radar sensor, and the time t between the laser emission and the arrival of the echo signal is calculated. The distance between the target object and the laser emitting object is obtained by using the time t and the speed of light. The processor judges and warns the distance measured by the laser radar sensor by triggering the warning device for sound and light warning when the distance between the car and the obstacle is within the warning distance or the dangerous distance range.

[0020] The laser radar sensor, processor and warning device are all located in the shell, and the shell is installed outside the front end of the refrigerated truck compartment. By arranging the laser radar sensor, processor and warning device at the front end of the refrigerated truck compartment, the refrigerated truck compartment is higher than the height of the refrigerated truck cab. By arranging the laser radar sensor on the compartment, it is convenient for the laser radar sensor to measure the distance between the refrigerated truck and the height limit pole. At the same time, by obtaining the distance and the actual distance between the refrigerated truck and the height limit pole, by obtaining the distance and the actual distance displayed by the navigation line, the driver can easily determine whether the height limit pole is above or below the laser radar sensor, which is convenient for the driver to determine whether the refrigerated truck can pass the current height limit pole.

[0021] The laser radar sensor includes a laser, a receiver and a time measurement unit. The laser is used to emit a laser beam, the receiver is used to receive the reflected beam, and the time measurement unit is used to measure the emission and reception time of the laser beam. The laser is a semiconductor laser or a fiber laser. The receiver is a photodiode or an avalanche photodiode.

[0022] The system also includes a filter, which is connected to the laser radar sensor and is used to filter the laser beam reflected back by the laser radar sensor. The laser beam reflected back by the laser radar sensor is filtered by the filter to improve the ranging accuracy.

[0023] The filter is a low-pass filter or a band-pass filter. Low-pass filters and band-pass filters are commonly used signal processing filters, which are used to adjust the frequency and filter the signal. Low-pass filter: A low-pass filter allows signals below a certain cutoff frequency to pass through, and suppresses signals above this frequency. Its function is to smooth the signal, remove high-frequency noise, or limit the bandwidth of the signal. Band-pass filter: A band-pass filter allows signals within a certain frequency range to pass through, and suppresses signals below and above this frequency range. Its function is to selectively pass signals within a certain frequency range and remove signals of other frequencies. Band-pass filters are often used in audio signal processing, wireless communications, biological signal processing and other fields. Common types of band-pass filters include Butterworth band-pass filters, elliptical band-pass filters, etc.

[0024] The system also includes a display unit, which is electrically connected to the processor. Through the display unit, the driver can conveniently view the data measured by the laser radar sensor.

[0025] The processor comprises: a data storage unit, a data processing unit and a data output unit, and the data storage unit and the data output unit are evenly connected to the data processing unit.

[0026] The system also includes a calibrator, which is connected to the laser radar sensor and is used to calibrate the emission time and reception time of the laser beam of the laser radar sensor. The emission and reception time of the laser beam can be calibrated by the calibrator to eliminate system errors. The calibrator is a clock calibrator or a time interval calibrator.

[0027] This solution improves the safety and efficiency of refrigerated trucks by applying lidar sensors to them to obtain the distance between the refrigerated truck and the height limit pole on the road in real time and accurately. The distance can remind the driver to promptly judge the height of the height limit pole to avoid the vehicle colliding with the height limit pole during driving, causing damage to the height limit pole and the refrigerated truck. An early warning device can be set to facilitate prompting of the driver. The processor can control multiple devices, reduce the number of device controllers, and save energy. The lidar sensor is set at the front end of the refrigerated truck compartment to facilitate the measurement of the distance between the refrigerated truck and the height limit pole.

[0028] The above is only an embodiment of the utility model, and the common sense such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several modifications and improvements can be made. In the utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A height limit detection and warning unit based on laser radar for refrigerated trucks, characterized in that: include: A shell, a laser radar sensor, a processor and an early warning device, wherein the laser radar sensor is used to measure the horizontal distance between a pure electric refrigerated truck and a height limit pole, the laser radar sensor, processor and early warning device are electrically connected in sequence, the processor is electrically connected to a refrigeration machine controller of the refrigerated truck, the laser radar sensor, processor and early warning device are all located in the shell, and the shell is installed on the outside of the front end of the refrigerated truck compartment; the laser radar sensor includes a laser, a receiver and a time measurement unit, the laser is used to emit a laser beam, the receiver is used to receive a reflected beam, and the time measurement unit is used to measure the emission and reception time of the laser beam.

2. According to claim 1, a laser radar-based height limit detection and warning unit for refrigerated trucks is characterized by: It also includes a filter, which is connected to the laser radar sensor and is used to filter the laser beam reflected back by the laser radar sensor.

3. According to claim 2, a laser radar-based height limit detection and warning unit for refrigerated trucks is characterized by: The filter is a low-pass filter or a band-pass filter.

4. According to claim 1, a laser radar-based height limit detection and warning unit for refrigerated trucks is characterized by: The device also includes a display unit, which is electrically connected to the processor.

5. According to claim 1, a laser radar-based height limit detection and warning unit for refrigerated trucks is characterized by: The processor comprises: a data storage unit, a data processing unit and a data output unit, and both the data storage unit and the data output unit are connected to the data processing unit.

6. According to claim 1, a laser radar-based height limit detection and warning unit for refrigerated trucks is characterized by: The laser is a semiconductor laser or a fiber laser.

7. According to claim 1, a laser radar-based height limit detection and warning unit for refrigerated trucks is characterized by: The receiver is a photodiode or an avalanche photodiode.

8. According to claim 1, a laser radar-based height limit detection and warning unit for refrigerated trucks is characterized by: It also includes a calibrator, which is connected to the laser radar sensor and is used to calibrate the emission time and reception time of the laser beam of the laser radar sensor.

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