Non-contact induction label and control method

Abstract

The invention belongs to the technical field of electronic goods labels, and particularly relates to a non-contact induction label and a control method. The main control MCU of the induction tag is provided with an induction distance threshold value, the laser distance measuring sensor is used for detecting the distance between an object located in an induction area and the induction tag, generating a distance signal and sending the distance signal to the main control MCU, and comparing the distance signal with the induction distance threshold value to judge whether an obstacle is induced or not; the laser distance measuring sensor sends more than two continuous distance signals to the main control MCU, the main control MCU compares the received continuous distance signals with an induction distance threshold value in sequence, and only when all the distance signals are within an induction distance threshold value interval, the main control MCU performs effective control once to activate the digital display screen to display; only when the main control MCU continuously receives the distance information conforming to the induction threshold interval for multiple times, effective control is carried out once, the digital display screen is activated for display, noise interference of external signals is effectively avoided, and meanwhile induction false triggering is prevented.

Description

Technical field:

[0001] The present invention belongs to the technical field of electronic cargo tags, and in particular relates to a contactless induction tag and a control method thereof. Background technology:

[0002] The current electronic cargo tags are equipped with digital display screens for displaying data information, as well as physical buttons for business operations. For power consumption and practicality considerations, the display screen of the electronic cargo tag panel usually automatically turns off the screen and enters a dormant state when no one is operating, thereby reducing power waste. When you need to view or operate, you need to manually click the button to activate the display. However, in high-intensity actual use, workers will frequently tap the buttons to trigger the screen display, which will cause a certain amount of wear and tear on the buttons. After a period of use, some buttons will fail, affecting the normal development of the outbound and inbound business, and even causing misoperation. Usually, the buttons need to be replaced after they fail, resulting in additional material and labor costs. At the same time, for some manufacturers, the shelf position is high, and direct operation is very inconvenient; for some manufacturers, frequent tapping of buttons will affect the picking efficiency when picking up goods frequently.

[0003] Based on this, non-contact induction tags have appeared on the market. Unlike traditional contact induction tags, the key activation method of the electronic cargo tag panel has been changed to a non-contact induction activation method that does not require tapping. Workers only need to place their hands above the sensing area, without touching it, and the tag will sense it, thus achieving non-sensing operation of the tag, improving operational convenience and efficiency.

[0004] However, existing contactless induction tags are easily interfered by noise from external signals, resulting in false induction triggering. Summary of the invention:

[0005] The object of the present invention is to provide a non-contact induction tag with a filtering function and preventing false induction triggering, and a control method thereof.

[0006] The present invention is achieved in that:

[0007] One of the purposes of the present invention is to provide a contactless induction tag, comprising: a main control MCU, a digital display screen, a laser ranging sensor, and an electronic cargo tag controller;

[0008] The main control MCU is set with a sensing distance threshold. The laser ranging sensor is used to detect the distance from the object in the sensing area to the inductive tag, and generate a distance signal to send to the main control MCU, which is compared with the sensing distance threshold to determine whether an obstacle is sensed;

[0009] The laser ranging sensor sends more than two consecutive distance signals to the main control MCU, and the main control MCU compares the received continuous distance signals with the sensing distance threshold in turn. Only when all distance signals are within the sensing distance threshold range, the main control MCU performs an effective control and activates the digital display screen for display.

[0010] In the above-mentioned non-contact induction tag, the main control MCU is connected to the laser ranging sensor through IIC communication.

[0011] In the above-mentioned contactless induction tag, the main control MCU is connected to the electronic cargo tag controller via CAN communication.

[0012] In the above-mentioned non-contact induction tag, the main control MCU is connected to the digital display screen via an LCD interface.

[0013] In the above-mentioned non-contact induction tag, the main control MCU, the laser distance sensor, and the digital display screen are arranged in the induction tag panel, and the induction tag panel adopts a high-transparency shell.

[0014] In the above-mentioned non-contact induction tag, the laser direction of the laser distance measuring sensor is arranged vertically or horizontally with the induction tag panel.

[0015] Another object of the present invention is to provide a control method for a contactless induction tag, comprising:

[0016] S1. Set the sensing distance threshold on the main control MCU;

[0017] S2. The worker places his hand in the sensing area and obtains distance signals multiple times through the laser distance measuring sensor. The main control MCU compares the continuous distance signals with the sensing distance threshold in turn. If each distance signal received meets the distance information of the sensing threshold interval, the main control MCU performs an effective control and activates the digital display screen; if at least one received distance signal does not meet the distance information of the sensing threshold interval, the main control MCU does not act;

[0018] In the above-mentioned control method of a contactless induction tag, the induction distance threshold is adjusted in real time according to the floating height between the goods and the induction tag. The system detects the distance H1 between the tag and the goods in real time and sends the distance signal to the main control MCU. The main control MCU has a built-in contact height H2 between people and goods. The real-time distance threshold is obtained by subtracting the above data H1 and H2.

[0019] The outstanding advantages of the present invention compared with the prior art are:

[0020] 1. The present invention performs effective control only when the main control MCU receives distance information that meets the sensing threshold range for multiple times in succession, activating the digital display screen to effectively avoid noise interference from external signals and also to prevent false triggering of the sensor.

[0021] 2. The sensing distance threshold of the present invention can be a variable. The system detects the height of the goods under the sensing tag in real time, and subtracts it from the contact height between people and goods built into the main control MCU1 to obtain the real-time sensing area. This can reduce the unnecessary waste of workers for contact sensing, make the workers' operating experience close to non-sensing operation, and improve labor efficiency.

[0022] 3. The induction label panel of the present invention adopts a high-brightness shell, and the corresponding RGB indicator light is easier to identify under the same circumstances and will not be misled. Description of the drawings:

[0023] Figure 1 It is a system framework diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of the change of the sensing distance threshold of the present invention;

[0025] Figure 3 It is a schematic diagram of non-contact sensing of the present invention.

[0026] In the figure: 1. Main control MCU; 2. Digital display screen; 3. Laser ranging sensor; 4. Electronic cargo tag controller; 5. Induction label panel; 6. Cargo. Specific implementation method:

[0027] The present invention is further described below with reference to specific embodiments. Figure 1-3 :

[0028] Embodiment 1:

[0029] The present embodiment provides a contactless induction tag, which includes: a main control MCU1, a digital display screen 2, a laser distance sensor 3, and an electronic cargo tag controller 4. After using laser sensing, mechanical buttons are no longer required, the corresponding lampshade strength requirements are greatly reduced, and a shell with a higher light transmittance can be selected. The corresponding RGB indicator light is easier to identify under the same circumstances and will not be misled. Therefore, the induction tag panel 5 of the present invention adopts a high-transparency shell, and the main control MCU1, the laser distance sensor 3, and the digital display screen 2 are arranged in the induction tag panel 5.

[0030] like Figure 1As shown, the main control MCU1 is connected to the electronic cargo tag controller 4 via CAN communication, receives instructions from the external controller via CAN communication, and sends relevant data information to the external controller according to demand, realizing the functions of outbound, inbound, inventory counting, node access and parameter setting.

[0031] The digital display screen 2 is connected to the main control MCU1 through an LCD interface, and can be activated and display relevant data information according to the instructions of the main control MCU1.

[0032] The laser distance sensor 3 transmits data with the main control MCU1 through the IIC interface. The laser distance sensor 3 is a distance sensor based on the TOF (time of flight) principle. It can receive the instruction of the main control MCU1 to start laser distance measurement. After the instruction parsing and processing of the internal firmware of the laser distance sensor 3, it continuously sends light pulses to the target, and then uses the sensor to receive the light returned from the object. The distance of the target object is obtained by detecting the flight (round trip) time of the light pulse. Finally, the distance information is fed back to the main control MCU1.

[0033] The present invention sets a sensing distance threshold in the main control MCU1, and the laser ranging sensor 3 is used to detect the distance from the object in the sensing area to the inductive tag, and generates a distance signal to send to the main control MCU1, which is compared with the sensing distance threshold to determine whether an obstacle is sensed; the laser ranging sensor 3 sends more than two consecutive distance signals to the main control MCU1, and the main control MCU1 compares the received continuous distance signals with the sensing distance threshold in turn. Only when all distance signals are within the sensing distance threshold range, the main control MCU1 performs an effective control and activates the digital display screen 2 for display.

[0034] Since the present invention performs effective control and activates the digital display screen 2 for display only when the main control MCU1 receives distance information that meets the sensing threshold range for multiple consecutive times, it has a filtering function, which can avoid noise interference from external signals and also prevent false triggering of the sensing.

[0035] In addition, the laser direction of the laser distance measuring sensor 3 of the present invention is set vertically or horizontally to the sensing label panel 5. When the structure is designed in a vertical direction, when the user operates the sensing label, he only needs to perform gesture sensing within the effective operating range (sensing area) to perform non-sensing operation, which is similar to the traditional button label operation; when the structure is designed in a horizontal direction, such as Figure 2 As shown, below the laser ranging sensor 3 are the stored and retrieved goods 6. When the user takes the stored goods, the signal will be automatically sensed and the confirmation operation will be performed, which greatly improves the convenience of operation.

[0036] Embodiment 2:

[0037] This embodiment provides a control method for a contactless induction tag, including:

[0038] Step S1, setting a sensing distance threshold in the main control MCU1;

[0039] Step S2, the worker puts his hand in the sensing area, the laser ranging sensor 3 obtains the distance signal for multiple times in succession, and continues sensing for about 0.5s. Generally speaking, two or three sensings are sufficient. The main control MCU1 compares the continuous distance signals with the sensing distance threshold in turn. If each distance signal received meets the distance information of the sensing threshold interval, the main control MCU1 performs an effective control, activates the digital display screen 2 to display, and moves the hand away; if at least one received distance signal does not meet the distance information of the sensing threshold interval, the main control MCU1 does not take any action.

[0040] Further, if Figure 2-3 As shown, when the sensing distance threshold is a variable, operation within the permitted range is effective operation. That is, the sensing distance threshold is adjusted in real time according to the floating height between the goods 6 and the inductive tag, the system detects the distance H1 between the inductive tag and the goods 6 in real time, and sends the distance signal to the main control MCU1, the main control MCU1 has a built-in contact height H2 between the person and the goods 6, and the above data H1 and H2 are subtracted to obtain the real-time distance threshold (sensing area). It should be noted that H2 can usually be considered as an approximate constant value. In this way, it can be avoided that when there are more goods 6 in the warehouse and the distance between the inductive tag and the goods 6 is relatively close, the general sensor is prone to false alarms because the sensing distance cannot be accurately set. At the same time, it can reduce the unnecessary waste of workers for contact sensing, so that the workers' operating experience is close to non-sensing operation. When the system detects that there are more goods 6, that is, the height distance H1 between the inductive tag and the goods 6 is relatively small, the sensing operation height (sensing area) between the inductive tag and the worker is small; and when there are fewer goods 6, the distance H1 between the inductive tag and the goods 6 is large, and the relative operating height (sensing area) of the worker is large.

[0041] The above embodiment is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A contactless induction tag, characterized in that: include: Main control MCU (1), digital display screen (2), laser distance sensor (3), and electronic cargo tag controller (4); The main control MCU (1) is set with a sensing distance threshold, and the laser distance measuring sensor (3) is used to detect the distance between an object located in the sensing area and the inductive tag, and generate a distance signal and send it to the main control MCU (1), and compare it with the sensing distance threshold to determine whether an obstacle is sensed; The laser distance sensor (3) sends two or more consecutive distance signals to the main control MCU (1), and the main control MCU (1) compares the received consecutive distance signals with the sensing distance threshold in sequence. Only when all the distance signals are within the sensing distance threshold range, the main control MCU (1) performs effective control and activates the digital display screen (2) for display.

2. A contactless induction tag according to claim 1, characterized in that: The main control MCU (1) is connected to the laser distance measuring sensor (3) via IIC communication.

3. The contactless induction tag according to claim 1, characterized in that: The main control MCU (1) is connected to the electronic cargo tag controller (4) via CAN communication.

4. The non-contact induction tag according to claim 1, characterized in that: The main control MCU (1) is connected to the digital display screen (2) via an LCD interface.

5. A contactless induction tag according to any one of claims 1 to 4, characterized in that: The main control MCU (1), the laser distance measuring sensor (3), and the digital display screen (2) are arranged in the induction label panel (5), and the induction label panel (5) adopts a high-transparency housing.

6. A contactless induction tag according to claims 1-4, characterized in that: The laser direction of the laser distance measuring sensor (3) is arranged vertically or horizontally with the sensing label panel (5).

7. A control method for a contactless induction tag according to any one of claims 1 to 6, characterized in that: include: S1. Set the sensing distance threshold in the main control MCU (1); S2, the worker places his hand in the sensing area, and the laser distance sensor (3) obtains distance signals for multiple times in succession. The main control MCU (1) compares the continuous distance signals with the sensing distance threshold in sequence. If each distance signal received meets the distance information of the sensing threshold interval, the main control MCU (1) performs an effective control and activates the digital display screen (2) for display; if at least one distance signal received does not meet the distance information of the sensing threshold interval, the main control MCU (1) does not take any action; 8. The control method of a contactless induction tag according to claim 7, characterized in that: The sensing distance threshold is adjusted in real time according to the floating height between the goods (6) and the inductive tag. The system detects the distance (H1) between the tag and the goods (6) in real time and sends the distance signal to the main control MCU (1). The main control MCU (1) has a built-in contact height (H2) between a person and the goods (6). The real-time distance threshold is obtained by subtracting the above data (H1) and (H2).

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