Electronic price tag system, electronic price tag, guide rail device for installing electronic price tag

Abstract

The present disclosure relates to an electronic price tag system, an electronic price tag and a guide rail device, the guide rail device comprising a guide rail, a plurality of positioning electrodes sequentially and spaced apart on the guide rail along the extension direction of the guide rail, and a first resistor connected in series between two adjacent positioning electrodes, and the tail positioning electrode is grounded. The electronic price tag comprises a price tag body, a power supply positive connection piece, a power supply negative connection piece and a conductive contact piece arranged on the price tag body, and the power supply positive connection piece and the power supply negative connection piece are configured to connect the power supply, and the power supply positive connection piece and the conductive contact piece are electrically connected through a second resistor. And, after the electronic price tag is installed on the guide rail, in the positioning measurement mode, the conductive contact piece is in contact with one positioning electrode, the power supply positive connection piece outputs a high level, and the voltage across the second resistor is measured. The voltage across the second resistor is configured to determine whether the price tag body is at a specified target position on the guide rail, without manual verification, thereby greatly reducing the management cost.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of new retail, in particular to an electronic price tag system, an electronic price tag and a guide rail device for installing the electronic price tag. BACKGROUND

[0002] As the infrastructure for the digitization of the retail industry, the electronic price tag system has been replicated in large quantities in the industry. It is expected that through simple low-cost hardware and software upgrades, the self-fine positioning related basic capabilities of the electronic price tag system will be increased, and more digital value of the hardware of the electronic price tag system in the retail scene will be mined.

[0003] Referring to Figure 1 , each layer of the shelf will be provided with a guide rail for installing an electronic price tag to display the price and origin of the corresponding product object on the electronic price tag. There is a unique correspondence between the electronic price tag and the corresponding product, such as electronic price tag 131 corresponding to product object 1.

[0004] Under normal circumstances, in a large supermarket or a chain supermarket, the specified target product is placed on the specified target shelf at the specified target display position according to market demand requirements, so as to improve the exposure rate and sales of the target product. However, in practice, the target product is not placed at the target display position as required, which requires a large amount of manual verification, thereby increasing the management cost of the large supermarket and the chain supermarket. SUMMARY

[0005] The present disclosure provides an electronic price tag system, an electronic price tag and a guide rail device for installing the electronic price tag to solve the technical problems existing in the prior art.

[0006] In a first aspect, the present disclosure provides an electronic price tag system, which comprises:

[0007] The guide rail device comprises a guide rail, a plurality of positioning electrodes arranged on the guide rail in sequence and at intervals along the extension direction of the guide rail, and a first resistor connected in series between adjacent two positioning electrodes, and the positioning electrode at the tail end is grounded.

[0008] The electronic price tag comprises a price tag body, a power supply positive pole connecting piece, a power supply negative pole connecting piece and a conductive contact piece arranged on the price tag body, and the power supply positive pole connecting piece and the power supply negative pole connecting piece are configured to connect a power supply, and the power supply positive pole connecting piece and the conductive contact piece are electrically connected through a second resistor.

[0009] The electronic price tag is configured to, after being installed on the guide rail, in a positioning measurement mode, make the conductive contact patch contact one of the positioning electrodes, make the power supply positive connection output a high level, and measure the voltage across the second resistor, the voltage across the second resistor being configured to determine whether the price tag body is at a target position on the guide rail.

[0010] In one embodiment, the electronic price tag is further configured to, after being installed on the guide rail, in a normal working mode, cut off the input electrical signal of the power supply positive connection.

[0011] In one embodiment, the guide rail device further comprises a power supply positive contact line and a power supply negative contact line connected with the power supply, and the tail end of the positioning electrode is connected with the power supply negative contact line.

[0012] The electronic price tag is configured to, after being installed on the guide rail, make the power supply positive connection contact the power supply positive contact line and make the power supply negative connection contact the power supply negative contact line.

[0013] In one embodiment, the conductive contact patch is a circular arc-shaped contact patch protruding towards the positioning electrode.

[0014] In one embodiment, the gap between adjacent positioning electrodes is 0.1 mm.

[0015] In one embodiment, the positioning electrodes are arranged on one end face of the guide rail, and the first resistors are arranged on the end face of the guide rail opposite to the positioning electrodes.

[0016] In one embodiment, the guide rail device further comprises a resistor pad on the same face as the first resistors, the positioning electrodes and the resistor pad are connected through a via hole formed on the guide rail, and adjacent two first resistors are connected through the resistor pad.

[0017] In one embodiment, the resistor pad is a carbon film resistor pad and / or the first resistor is a carbon film resistor.

[0018] In one embodiment, the electronic price tag comprises:

[0019] a chip arranged on the price tag body, a first port of the chip being connected with the power supply positive connection and the second resistor, a second port of the chip being used for measuring the voltage across the second resistor, and a third port of the chip being grounded.

[0020] In one embodiment, the first port is a general-purpose input / output port and / or the second port is a digital-to-analog conversion port.

[0021] In a second aspect, the present disclosure also provides an electronic price tag, comprising a price tag body, and a power supply positive pole connector, a power supply negative pole connector and a conductive contact patch arranged on the price tag body, and the power supply positive pole connector and the power supply negative pole connector are configured to be connected to a power supply, and the power supply positive pole connector and the conductive contact patch are electrically connected through a second resistor;

[0022] The electronic price tag is configured to, after being installed on the guide rail, in a positioning measurement mode, make the conductive contact patch contact a positioning electrode on the guide rail, make the power supply positive pole connector output a high level, and measure a voltage across the second resistor, and the voltage across the second resistor is configured to be used to determine whether the price tag body is at a target position on the guide rail.

[0023] In a third aspect, the present disclosure also provides a guide rail device for installing an electronic price tag, wherein the electronic price tag is the electronic price tag according to any one of the above, and the guide rail device comprises a guide rail, a plurality of positioning electrodes arranged on the guide rail in sequence and at intervals along the extension direction of the guide rail, and a first resistor connected in series between adjacent two positioning electrodes, and the positioning electrode at the tail end is grounded.

[0024] In an embodiment, the gap between adjacent positioning electrodes is 0.1 mm.

[0025] In an embodiment, the first resistor is a carbon film resistor.

[0026] One of the beneficial effects of the electronic price tag system, the electronic price tag and the guide rail device of the present disclosure is that the length of each positioning electrode along the extension direction of the guide rail and the sum of the gaps between adjacent positioning electrodes are taken as the minimum measurement unit, when the conductive contact patch on the electronic price tag contacts any one of the positioning electrodes, the electronic price tag and the positioning electrode currently contacted by the electronic price tag to the positioning electrode at the tail end form a current loop, when the power supply outputs a high level through the power supply positive pole connector, the voltage across the second resistor can be detected, and the actual position of the electronic price tag on the guide rail can be obtained by combining the voltage division principle, and then the actual position and the target position are compared, and according to the comparison result, it can be known whether the electronic price tag is placed in place, and if not, an alarm can be sent to remind the user, without manual verification, thereby greatly reducing the management cost.

[0027] The electronic price tag system of the present disclosure does not set a positioning detection circuit on the guide rail, but ingeniously takes the length of each positioning electrode and the sum of the gaps between adjacent two positioning electrodes as the minimum measurement unit, uses the positioning detection circuit composed of the positioning electrode and the electronic price tag to obtain the voltage of the second resistor, and uses the detected voltage to determine the actual position of the electronic price tag on the guide rail, and the structure is simple and easy to implement.

[0028] In addition, the first resistor is a carbon film resistor, which is printed on the guide rail or the positioning circuit board, and this method can be implemented on a plane, avoiding the protrusion of components and devices, and after the carbon oil is covered, it has the characteristics of dirt resistance, corrosion resistance, high engineering reliability and low implementation cost. In addition, the carbon film resistor can be conveniently printed in batches to ensure more segmented positioning electrodes, and the implementation cost is high.

[0029] It should be noted that the electronic price tag and the guide rail device for installing the electronic price tag of the present disclosure have the same or corresponding technical features as the above-mentioned electronic price tag system, and therefore also have the same technical effects. Therefore, this paper will not repeat it here. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0031] Figure 1 It is a schematic diagram of the corresponding relationship between the electronic price tag on the shelf and the placed goods;

[0032] Figure 2 It is a structural schematic diagram of the guide rail device of the present disclosure in an embodiment;

[0033] Figure 3 It is a structural schematic diagram of the electronic price tag of the present disclosure in an embodiment;

[0034] Figure 4 It is a working principle diagram of the chip of the electronic price tag in an embodiment.

[0035] Figures 2 to 4 The one-to-one correspondence between the names of various components and the reference numerals in the specification is as follows:

[0036] 1 Guide rail device: 10 guide rail, 11 positioning electrode, 12 first resistor, 13 resistor pad, 14 positive electrode contact line, 15 negative electrode contact line;

[0037] 2 Electronic price tag: 20 price tag body, 21 positive electrode connecting piece, 22 negative electrode connecting piece, 23 conductive contact piece, 24 chip, 241 first port, 242 second port, 243 third port, 25 second resistor. DETAILED DESCRIPTION

[0038] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement, numerical expression and values of the components and steps set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

[0039] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting to the disclosure and its application or uses.

[0040] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and devices can be considered part of the present disclosure.

[0041] In all of the compositions shown and discussed herein, any specific values should be interpreted as merely exemplary, and not a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0042] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, it need not be discussed further in subsequent figures.

[0043] The present disclosure provides an electronic price tag system, the electronic price tag system of the present disclosure comprises a guide rail device and an electronic price tag, wherein the guide rail device comprises a guide rail, a plurality of positioning electrodes sequentially and spacedly arranged along the extension direction of the guide rail, and a first resistor connected in series between two adjacent positioning electrodes, and the tail positioning electrode is grounded. The electronic price tag comprises a price tag body, a power supply positive pole connector, a power supply negative pole connector and a conductive contact piece arranged on the price tag body, and the power supply positive pole connector and the power supply negative pole connector are configured to connect a power supply, and the power supply positive pole connector and the conductive contact piece are electrically connected through a second resistor. And, after the electronic price tag is installed on the guide rail, in the positioning measurement mode, the conductive contact piece is configured to contact one positioning electrode, the power supply positive pole connector is configured to output a high level, and the voltage across the second resistor is configured to measure the voltage across the second resistor, and the voltage across the second resistor is configured to determine whether the price tag body is at a specified target position on the guide rail.

[0044] The positioning principle of the electronic price tag system is that the length of each positioning electrode along the extension direction of the guide rail and the sum of the gap between the adjacent positioning electrodes are taken as the minimum measurement unit. When the conductive contact piece on the electronic price tag contacts any one positioning electrode, the electronic price tag and the positioning electrode currently contacted to the tail positioning electrode form a current loop. When the power supply outputs a high level through the power supply positive pole connector, the voltage across the second resistor can be detected, and the actual position of the electronic price tag on the guide rail can be obtained by combining the voltage division principle. By comparing the actual position with the target position, it can be known whether the electronic price tag is placed in place according to the comparison result. If the electronic price tag is not placed at the target position, an alarm can be sent to remind the user, without manual verification, thereby greatly reducing the management cost.

[0045] The electronic price tag system of the present disclosure does not set a positioning detection circuit on the guide rail, but ingeniously takes the length of each positioning electrode and the sum of the gaps between the adjacent two positioning electrodes as the minimum measurement unit, uses the positioning detection circuit composed of the positioning electrode and the electronic price tag to obtain the voltage of the second resistance, and uses the detected voltage to determine the actual position of the electronic price tag on the guide rail, which is simple in structure and easy to implement.

[0046] For better understanding, the specific structure of the electronic price tag system of the present disclosure and its working principle will be described in detail below with reference to Figures 2 to 4 It should be noted that the present disclosure also provides an electronic price tag and a guide rail device for installing the electronic price tag. In order to keep the text brief, the electronic price tag and the guide rail device for installing the electronic price tag are introduced together when the electronic price tag system is described, and the two will not be described separately.

[0047] Referring to Figure 2 The electronic price tag system of the present disclosure includes a guide rail device 1 for installing an electronic price tag, which includes a guide rail 10. The guide rail 10 is usually a long strip-shaped metal piece, plastic piece or resin piece, and is configured to extend along the length direction of the shelf panel and substantially keep consistent with the length of the space on the panel for placing goods. The guide rail 10 is fixedly or detachably connected to the crossbeam of the shelf panel. The front part of the guide rail 10 is provided with a mounting groove, and the electronic price tag is detachably installed in the mounting groove. It should be noted that the front part refers to the side of the shelf facing the user, so as to facilitate the user to take or place the electronic price tag on the shelf.

[0048] The guide rail device 1 can also include a positioning circuit board, which includes a circuit board body, a plurality of positioning electrodes 11 arranged in sequence at the head and tail of the circuit board body along the extension direction of the guide rail 10, and a first resistance 12 connected in series between the adjacent two positioning electrodes 11. Of course, the positioning electrodes 11 and the first resistance 12 can be directly arranged on the guide rail 10 to save the positioning circuit board.

[0049] For example, the length of the guide rail 10 is 850 mm, and after removing the transition area length of 20 mm between the left and right ends of the guide rail 10 to the nearest positioning electrode 11, the remaining length of the guide rail 10 is 810 mm, that is, 81 positioning electrodes 11 can be arranged on the guide rail 10. In order to facilitate the recording of the 81 positioning electrodes 11, they are sequentially numbered as S1-S81 from the head to the tail. Of course, in other embodiments, the positioning electrodes 11 at the head and tail are aligned with the left and right ends of the guide rail 10.

[0050] In order to ensure the accuracy of the measurement accuracy, the gap between the two adjacent positioning electrodes 11 is controlled in the smallest range, such as the gap between the two adjacent positioning electrodes 11 is 0.1mm, in such a small gap, different first resistance 12 is set.

[0051] For this purpose, see Figure 2 In this embodiment, the positioning electrode 11 is arranged on one end surface of the guide rail 10, and the second resistance is arranged on the end surface of the guide rail 10 opposite to the positioning electrode 11.

[0052] In this way, the guide rail device can fully utilize the two side surfaces of the guide rail to arrange the positioning electrode 11 and the first resistance 12.

[0053] In addition, the first resistance is a carbon film resistance, which is printed on the guide rail 10 or the positioning circuit board. This method can be implemented on a plane, avoiding the protrusion of components, and has the characteristics of high engineering reliability, low implementation cost, and high implementation cost after carbon oil covering. In addition, the carbon film resistance is convenient for batch printing, which ensures more positioning electrodes 11 segments.

[0054] In detail, the guide rail device 1 further comprises a resistance pad 13 located on the same end surface as the first resistance 12, and the positioning electrode 11 and the resistance pad 13 are connected through the via hole 110 opened on the guide rail 10. The two adjacent first resistances 12 are connected through the resistance pad 13. The resistance pad 13 is also a carbon film resistance pad.

[0055] It should be noted that the carbon film resistance pad has the same effect as the carbon film resistance, which has been fully described in the foregoing, and will not be repeated here.

[0056] In addition, after the carbon film resistance pad has the same effect as the carbon film resistance, along the extension direction of the guide rail 10, the length of the positioning electrode 11 and the gap between the two adjacent positioning electrodes 11 form the smallest measurement unit, such as the length of the positioning electrode 11 is 9.9mm, and the gap between the two adjacent positioning electrodes 11 is 0.1mm, that is, the length of the positioning electrode 11 and the gap between the two adjacent positioning electrodes 11 form the smallest measurement unit of 10mm. The number of positioning electrodes 11 depends on the length of the guide rail 10. It should be noted that in other embodiments, the length of the positioning electrode 11 and the gap between the two adjacent positioning electrodes 11 form the smallest measurement unit of 9mm to 11mm.

[0057] Based on this, when the electronic price tag is placed at a certain position of the guide rail 10, if the actual position of the electronic price tag can be automatically obtained, and the relationship between the actual position and the specified target position is compared, according to the comparison structure, it can be judged whether the electronic price tag is placed at the specified target position on the target shelf, such as the target goods such as seasonal new products and best-selling products placed at the target position of the target shelf close to the door. If the comparison result is that the actual position of the electronic price tag is inconsistent with the specified target position, the user can be notified to update. Therefore, the electronic price tag and the guide rail device need to cooperate to obtain the actual position of the electronic price tag on the guide rail 10.

[0058] In detail, referring to Figure 3 In the embodiment, the electronic price tag 2 includes a price tag body 20 and a power supply positive connection piece 21, a power supply negative connection piece 22 and a conductive contact piece 23 arranged on the price tag body 20, wherein the power supply positive connection piece 21 and the power supply negative connection piece 22 are configured to communicate with the power supply, and the power supply positive connection piece 21 and the conductive contact piece 23 are connected in series through the second resistor.

[0059] The price tag body 20 is usually a cuboid element made of insulating material, and a display screen is also arranged on the price tag body 20, and the display screen can display the relevant information of the goods corresponding to the electronic price tag 2 under the power supply, such as name, price, origin, etc., and the specific display content is not limited herein.

[0060] The electronic price tag 2 is configured to be installed on the guide rail 10 and in the positioning measurement mode, the conductive contact piece 23 is in contact with a positioning electrode 11, the power supply is connected with the power supply positive connection piece 21 and the power supply negative connection piece 22, and the voltage across the second resistor is detected.

[0061] At this time, the power supply, the second resistor, the positioning electrode 11 currently in contact with the first conductive contact piece, and the first resistor 12 between the adjacent two of these positioning electrodes 11 form a complete current loop, and the voltage across the second resistor is measured again.

[0062] It should be noted that the electronic price tag 2 of the present disclosure can be provided with a dry battery or a rechargeable battery, or can be externally connected to a power supply, and the power supply is connected with the power supply positive connection piece 21 and the power supply negative connection piece 22, and in the embodiment, the guide rail device 1 provides power for the electronic price tag 2.

[0063] In detail, continuing to refer to Figure 2 The guide rail device 1 further includes a power supply positive contact line 14 and a power supply negative contact line 15, which are parallel to each other and arranged on both sides of the positioning electrode 11, the tail end of the positioning electrode 11 is connected with the power supply negative contact line 14, and both are connected with the ground wire.

[0064] When the electronic price tag 2 is installed on the guide rail device 1, the power supply positive pole connecting piece 21 of the electronic price tag 2 is in contact with the power supply positive pole contact line 14, the power supply negative pole connecting piece 22 of the electronic price tag 2 is in contact with the power supply negative pole contact line 15, and the conductive contact piece 23 of the electronic price tag 2 is in contact with one positioning electrode 11.

[0065] Similarly, the power supply of the guide rail device 1 can be provided with dry batteries or rechargeable batteries, or can be an external power supply.

[0066] Continuing to refer to Figure 3 The power supply positive pole connecting piece 21, the power supply negative pole connecting piece 22, and the conductive contact piece 23 are all arc-shaped elastic pieces bent towards the guide rail 10 side.

[0067] The arc-shaped elastic piece can reduce the lateral resistance when the electronic price tag 2 is moved on the guide rail, and reduce the damage to the positioning electrode 11. At the same time, the design of the arc-shaped elastic piece can also ensure the gap between the two adjacent positioning electrodes, and will not cause the arc-shaped elastic piece to lose connection with the positioning electrode. At the position of 0.1mm gap, the arc-shaped elastic piece will be connected with the two positioning electrodes in front and back, thereby ensuring the accuracy of the voltage detection value.

[0068] Referring to Figure 4 The electronic price tag 2 further comprises a chip 24, which is arranged on the price tag body 20. The chip 24 comprises a first port 241, a second port 242, and a third port 243. The first port 241 is connected through a second resistor 25 and the conductive contact piece 23, the second port 242 is connected between the second resistor 25 and the conductive contact piece 23, and the third port is grounded. The first port 241 is connected with the power supply positive pole connecting piece 21, and the second port 242 is used for measuring the voltage across the second resistor 25. The third port 243 is connected with the power supply negative pole connecting piece 22 and the ground wire.

[0069] In detail, the first port 241 is a general input and output port, and the second port 242 is a digital-to-analog conversion port. When the electronic price tag system is in the positioning measurement mode, the first port 241 inputs a high level. When the electronic price tag system is in the normal working mode, that is, in the non-positioning measurement mode, the first port 241 is set as an analog input, and the second port 242 is set as an analog input, so as to ensure that the positioning electrode 11 is in a non-electrically connected state.

[0070] The digital-to-analog conversion port can complete the positioning measurement in milliseconds, so as to ensure that the positioning electrode 11 is in a non-electrically connected state most of the time.

[0071] Of course, in other embodiments, a pressure measuring element can be connected in parallel across the second resistor 25 to measure the voltage across the second resistor 25.

[0072] When the electronic price tag system detects the voltage of the second resistor 25, the electronic price tag 2 is connected to the server in a wired or wireless manner. Specifically, when the electronic price tag transmits data to the server, the communication link can be a wireless channel such as Bluetooth / wifi, or a wired channel such as CAN / RS485 / Ethernet.

[0073] When the server obtains the voltage of the second resistor 25, the actual position of the electronic price tag 2 on the guide rail 10 is determined. The specific determination method is realized by the following formula (I):

[0074] Formula (I)

[0075] Wherein, L represents the distance between the leftmost end of the guide rail and the electronic price tag, R2 represents the second resistor, U represents the high level input by the positive connection of the power supply, U2 represents the voltage across the second resistor, R1 represents the first resistor, and l represents the sum of the length of one positioning electrode and the gap between the adjacent two positioning electrodes in the extension direction of the guide rail.

[0076] It should be noted that the voltage across the second resistor 25 is measured 10 times at random times, and the minimum value is taken.

[0077] Obviously, the electronic price tag system does not set a positioning detection circuit on the guide rail 10, but ingeniously takes the sum of the length of each positioning electrode 11 and the gap between the adjacent two positioning electrodes as the minimum measurement unit, uses the positioning detection circuit composed of the positioning electrode 11 and the electronic price tag 2 to obtain the voltage of the second resistor, and uses the detected voltage to determine the actual position of the electronic price tag on the guide rail. The structure is simple and easy to realize.

[0078] When the electronic price tag measures the voltage across the second resistor, the electronic price tag and the server are connected in a wired or wireless manner, and the voltage across the second resistor 25 is transmitted to the server. The server has a storage unit and a calculation unit. The storage unit stores the actual length of the guide rail 10 and the parameters in formula (I), and the calculation unit calculates the actual position of the electronic price tag on the guide rail 10 according to formula (I), that is, the actual distance from the left end of the guide rail to the contact point of the electronic price tag 2 and the positioning electrode 11.

[0079] The instruction sent by the server is to place the electronic price tag at the target position of the guide rail on the shelf. The target position value can be the target distance from the left end of the guide rail as the starting end. Of course, the value is not a single value, but a value range, which is an acceptable deviation amount. The skilled person in the art can set it based on the actual situation, which is not limited herein.

[0080] When the computing unit obtains the actual distance from the left end of the guide rail to the contact point between the electronic price tag and the positioning electrode sheet, the server determines whether the actual distance and the target distance are consistent. If they are consistent, it means that the electronic price tag is placed at the specified target position. If they are not consistent, it means that the electronic price tag is mispositioned. The server can send an alarm signal to remind the user to reposition the electronic price tag.

[0081] For better understanding, the working principle of the electronic price tag system of the present disclosure will be described in detail below with reference to Figures 2 to 4 an application scenario.

[0082] A certain supermarket chain receives a server instruction to place a new seasonal product A at the target position B on the third layer of the target shelf at the entrance of the supermarket. The supermarket staff places the electronic price tag 2 on the guide rail 10 on the third layer of the target shelf. At this time, the conductive contact piece 23 on the electronic price tag 2 is in contact with a positioning electrode 11 on the guide rail 10, the positive electrode connecting piece 21 is in contact with the positive electrode contact line 14 on the guide rail 10, and the negative electrode connecting piece 22 is in contact with the negative electrode contact line 15 on the guide rail 10. The power supply is connected to the positive electrode contact line 14 and the negative electrode contact line 15.

[0083] When the electronic price tag system needs to measure the actual position of the electronic price tag 2 on the shelf, the general input and output port of the chip 24 inputs a high level, and the digital-to-analog conversion port measures the voltage at both ends of the second resistor 25.

[0084] The server obtains the voltage at both ends of the second resistor 25 and calculates the actual distance from the left end of the guide rail 10 to the positioning electrode 11 in contact with the electronic price tag 2 based on the voltage according to Formula (I). It is determined whether the actual distance and the target distance given by the server are consistent. If they are consistent, it means that the electronic price tag 2 is placed at the specified target position. If they are not consistent, it means that the electronic price tag 2 is mispositioned. The server can send an alarm signal to remind the user to reposition the electronic price tag.

[0085] The above has described various embodiments of the present disclosure. The above description is exemplary and is not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles, practical applications, or technical improvements in the art, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims

1. An electronic price tag system, characterized by, The application relates to a rail device (1) and an electronic price tag (2). The rail device (1) comprises a rail (10), a plurality of positioning electrodes (11) arranged on the rail (10) in sequence and at intervals along the extension direction of the rail (10), and a first resistor (12) connected in series between two adjacent positioning electrodes (11), and the tail-end positioning electrode (11) is grounded. The electronic price tag (2) comprises a price tag body (20), a power supply positive pole connecting piece (21), a power supply negative pole connecting piece (22) and a conductive contact piece (23) arranged on the price tag body (20), and the power supply positive pole connecting piece (21) and the power supply negative pole connecting piece (22) are configured to connect a power supply, and the power supply positive pole connecting piece (21) and the conductive contact piece (23) are electrically connected through a second resistor (25). When the electronic price tag (2) is installed on the rail (10) and in a positioning measurement mode, the conductive contact piece (23) is in contact with one positioning electrode (11), and the power supply, the second resistor (25), the positioning electrode (11) currently in contact with the conductive contact piece (23) and a plurality of first resistors (12) connected in series near the head end side of the rail (10) form a current loop, so that the power supply positive pole connecting piece (21) outputs a high level and the voltage across the second resistor (25) is measured, the number of the first resistors (12) is calculated according to the high level and the voltage across the second resistor (25), and the number of the first resistors (12) is multiplied by a minimum measurement unit, and then the length of a transition section between the end of the rail (10) and the nearest positioning electrode (11) is added, so that the actual position of the electronic price tag (2) on the rail (10) is determined, and whether the actual position is consistent with the target position of the price tag body (20) on the rail (10) is judged. The minimum measurement unit is the sum of the length of each positioning electrode (11) and the gap between two adjacent positioning electrodes (11).

2. The electronic price tag system of claim 1, wherein, The electronic price tag (2) is further configured to cut off the input electric signal of the power supply positive pole connecting piece (21) when the electronic price tag (2) is installed on the rail (10) and in a normal working mode.

3. The electronic price tag system of claim 1, wherein, The rail device (1) further comprises a power supply positive pole contact line (14) and a power supply negative pole contact line (15) connected with the power supply, and the tail-end positioning electrode (11) is connected with the power supply negative pole contact line (15). When the electronic price tag (2) is installed on the rail (10), the power supply positive pole connecting piece (21) is in contact with the power supply positive pole contact line (14), and the power supply negative pole connecting piece (22) is in contact with the power supply negative pole contact line (15).

4. The electronic price tag system of claim 1, wherein, The conductive contact piece (23) is a circular-arc contact piece protruding towards the positioning electrode (11).

5. The electronic price tag system of claim 1, wherein, The gap between two adjacent positioning electrodes (11) is 0.1 mm.

6. Electronic price label system according to any of the claims 1 to 5, characterized in that, The positioning electrode (11) is arranged on one end surface of the guide rail (10), and the first resistor (12) is arranged on the end surface of the guide rail (10) opposite to the positioning electrode (11).

7. The electronic price tag system of claim 6, wherein, The guide rail device (1) further comprises a resistor pad (13) arranged on the same surface as the first resistor (12), and the positioning electrode (11) and the resistor pad (13) are connected through a via hole arranged on the guide rail (10), and two adjacent first resistors (12) are connected through the resistor pad (13).

8. The electronic price tag system of claim 7, wherein, The resistor pad (13) is a carbon film resistor pad, and / or the first resistor (12) is a carbon film resistor.

9. The electronic price label system according to any one of claims 1 to 5, characterized in that, The electronic price tag (2) comprises: a chip (24) arranged on the price tag body (20), wherein a first port (241) of the chip (24) is connected to the positive electrode connecting piece (21) and the second resistor (25), a second port (242) of the chip (24) is used for measuring the voltage across the second resistor (25), and a third port (243) of the chip (24) is grounded.

10. The electronic price tag system of claim 9, wherein, The first port (241) is a general-purpose input / output port, and / or the second port (242) is a digital-to-analog conversion port.

11. An electronic price tag, characterized by The electronic price tag (2) comprises a price tag body (20), and a positive electrode connecting piece (21), a negative electrode connecting piece (22), and a conductive contact piece (23) arranged on the price tag body (20), wherein the positive electrode connecting piece (21) and the negative electrode connecting piece (22) are configured to be connected to a power supply, and the positive electrode connecting piece (21) and the conductive contact piece (23) are electrically connected through a second resistor (25). After the electronic price tag (2) is installed on the guide rail (10), in a positioning measurement mode, the conductive contact piece (23) is in contact with a positioning electrode (11) on the guide rail (10), and the power supply, the second resistor (25), the positioning electrode (11) currently in contact with the conductive contact piece (23), and the positioning electrode (11) in contact are connected in series with a plurality of first resistors (12) near a head end side of the guide rail (10) to form a current loop, so that the positive electrode connecting piece (21) outputs a high level and measures the voltage across the second resistor (25), the number of the first resistors (12) is calculated based on the high level and the voltage across the second resistor (25), and the number of the first resistors (12) is multiplied by a minimum measurement unit and added to the length of a transition section between the end of the guide rail (10) and the nearest positioning electrode (11) to determine the actual position of the electronic price tag (2) on the guide rail (10), and it is determined whether the actual position is consistent with a target position of the price tag body (20) on the guide rail (10). The minimum measurement unit is the sum of the length of each positioning electrode (11) and the gap between adjacent two positioning electrodes (11).

12. A rail device for mounting an electronic price tag, characterized by The electronic price tag (2) is the electronic price tag (2) of claim 11, the guide rail device (1) comprises a guide rail (10), a plurality of positioning electrodes (11) arranged on the guide rail (10) in sequence and at intervals along the extension direction of the guide rail (10), and a first resistor (12) connected in series between adjacent two positioning electrodes (11), and the positioning electrode (11) at the tail end is grounded.

13. The guide rail device according to claim 12, characterized by The gap between adjacent positioning electrodes (11) is 0.1mm.

14. The guide rail device according to claim 12, characterized by The first resistor (12) is a carbon film resistor.

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