Electronic label device

Abstract

An electronic tag device is provided, comprising: a housing and a circuit board. The housing defines a receiving cavity, and the circuit board is detachably disposed in the receiving cavity. The circuit board is provided with a controller, a radio frequency identification (RFID) tag circuit connected to the controller, and a cellular communication and positioning circuit connected to the controller. The electronic tag device has multiple functions to meet the actual needs of users.

Description

Technical Field

[0001] The present application relates to the technical field of electronic tag communication, and in particular to an electronic tag device. Background Art

[0002] With the rapid development of Internet of Things (IoT) technology, radio frequency identification (RFID) electronic tags have been widely used in industrial automation, commercial automation and many other fields. RFID electronic tags belong to non-contact automatic identification technology. RFID electronic tags use radio frequency signals to identify target objects and obtain relevant data. The identification work does not require human intervention. As a wireless version of barcodes, RFID technology has the advantages of waterproof, anti-magnetic, high temperature resistance, long service life, large reading distance, data on the tag can be encrypted, large storage capacity, and free change of stored information.

[0003] However, existing RFID electronic tags all have single functions and cannot meet the actual needs of users. Summary of the invention

[0004] The present application provides an electronic label device, which has multiple functions to meet the actual needs of users.

[0005] The present application provides an electronic tag device, including: a housing and a circuit board. The housing defines a housing cavity, the circuit board is detachably disposed in the housing cavity, and the circuit board is provided with a controller, a radio frequency identification (RFID) tag circuit connected to the controller, and a cellular communication and positioning circuit connected to the controller. The controller is configured (i.e., structured and arranged) to obtain first target on-board diagnostic (OBD) data from the vehicle, and convert the first target OBD data to obtain converted first target OBD data that complies with ISO18000-6C, and the RFID tag circuit is configured to obtain the converted first target OBD data that complies with ISO18000-6C from the controller, and store the converted first target OBD data that complies with ISO18000-6C, thereby allowing the first server to obtain the converted first target OBD data that complies with ISO18000-6C from the RFID tag circuit. The cellular communication and positioning circuit is configured to obtain the current location data of the electronic tag device and send the current location data to the second server, so that the second server can output a tag data update instruction in response to the current geographical area where the electronic tag device is located determined by the current location data being different from the previously determined geographical area. The cellular communication and positioning circuit is configured to wirelessly receive the tag data update instruction from the second server and send the tag data update instruction to the controller; and the controller is configured to obtain a target tag data set corresponding to the tag data update instruction from multiple tag data sets, and send the target tag data set to the RFID tag circuit for tag data update.

[0006] In one embodiment, the housing includes a first cover and a second cover; the second cover is detachably connected to the first cover and cooperates with the first cover to define a receiving cavity; and the circuit board is detachably connected to the second cover.

[0007] In one embodiment, the circuit board is also provided with a first antenna connector and a second antenna connector, which are electrically connected to the cellular communication and positioning circuits; the shell defines a first through hole and a second through hole; and the first through hole is configured to expose the first antenna connector and allow the cellular communication antenna to be connected to the first antenna connector, and the second through hole is configured to expose the second antenna connector and allow the global navigation satellite system (GNSS) antenna to be connected to the second antenna connector.

[0008] In one embodiment, the circuit board is further provided with a power connector exposed by the housing, and the power connector is configured to be connected to a vehicle power supply through a cigarette lighter plug.

[0009] In one embodiment, the circuit board is also provided with a light emitting diode (LED) indicator light exposed by the shell, and the LED indicator light is configured to emit light of different colors for indicating different working states of the electronic tag device; the circuit board is also provided with a peripheral interface exposed by the shell, and the peripheral interface is configured to communicate with a host computer; and the circuit board is also provided with a card slot, and the card slot is configured to connect a user identity module (SIM) card.

[0010] In one embodiment, the controller is a system-on-chip (SOC) controller and includes: a memory that stores multiple tag data sets; a processor that is connected to the memory; and a Bluetooth communication circuit that is connected to the processor; and the Bluetooth communication circuit has a first mode and a second mode, and the Bluetooth communication circuit is configured to wirelessly connect to the OBD device in the first mode and wirelessly connect to the mobile terminal in the second mode.

[0011] In one embodiment, the Bluetooth communication circuit is configured to obtain OBD data from the vehicle through the OBD device in a first mode and output the OBD data to the processor; the processor is configured to obtain first target OBD data based on the OBD data obtained from the Bluetooth communication circuit, and convert the data format of the first target OBD data to obtain the converted first target OBD data that complies with ISO18000-6C; and the OBD data includes: static data, which includes a vehicle identification number (VIN); and dynamic data, which includes at least one of a fuel tank level, odometer data, and vehicle exhaust emission parameters.

[0012] In one embodiment, the vehicle exhaust emission parameters include: oxygen sensor test data, catalyst test data and variable valve timing (VVT) test data; and the OBD data also includes: vehicle fault diagnosis data and vehicle control data.

[0013] In one embodiment, the processor is further configured to obtain second target OBD data based on the OBD data obtained from the Bluetooth communication circuit, and send the second target OBD data to the cellular communication and positioning circuit, thereby allowing the second server to obtain the second target OBD data from the cellular communication and positioning circuit.

[0014] In one embodiment, the cellular communication and positioning circuit is specifically configured to receive the second target OBD data, encrypt the second target OBD data, and wirelessly transmit the encrypted second target OBD data to the second server.

[0015] In one embodiment, the processor is also configured to obtain third target OBD data based on the OBD data obtained from the Bluetooth communication circuit, and send the third target OBD data to the Bluetooth communication circuit; and the Bluetooth communication circuit is configured to receive the third target OBD data, and in the second mode output the third target OBD data to the mobile terminal for user viewing.

[0016] In one embodiment, the Bluetooth communication circuit is specifically configured to receive the third target OBD data, encrypt the third target OBD data, and wirelessly send the encrypted third target OBD data to the mobile terminal in the second mode for user viewing.

[0017] In one embodiment, each set of the plurality of tag data sets includes: an electronic product code (EPC) and a tag identifier (TID).

[0018] In one embodiment, the TIDs of the multiple tag data sets include multiple account information corresponding to different geographical areas respectively, and the TID of the target tag data set includes one account information corresponding to the current geographical area among the multiple account information, and the current geographical area is one of the different geographical areas.

[0019] In one embodiment, the cellular communication and positioning circuit includes: a positioning circuit and a cellular communication circuit; the positioning circuit supports at least one selected from the group consisting of a global positioning system (GPS), a Beidou navigation satellite system (BDS), a Galileo satellite navigation system (GALILEO) and a GLONASS satellite navigation system (GLONASS); the cellular communication circuit is connected to the positioning circuit; the positioning circuit is configured to obtain current location data of the electronic tag device and send the current location data to the cellular communication circuit; and the cellular communication circuit is configured to receive the current location data and wirelessly send the current location data to a second server, so that the second server can output a tag data update instruction in response to the current geographical area where the electronic tag device determined by the current location data is located being different from the previously determined geographical area, and the cellular communication circuit is configured to wirelessly receive the tag data update instruction from the second server and send the tag data update instruction to the controller.

[0020] In one embodiment, the cellular communication circuit includes: a baseband processor and a radio frequency (RF) transceiver; the baseband processor is provided with a SIM interface, and the SIM interface is configured to connect a SIM card; the RF transceiver is connected to the baseband processor; and the positioning circuit is connected to the baseband processor.

[0021] In one embodiment, the processor is configured to obtain data to be displayed and send the data to be displayed to the Bluetooth communication circuit; and the Bluetooth communication circuit is configured to receive the data to be displayed, convert the data to be displayed, and then output the converted data to be displayed to the mobile terminal in the second mode for user viewing.

[0022] In one embodiment, the first server is an authenticated electronic toll collection (ETC) server, and the converted first target OBD data includes vehicle exhaust data compliant with ISO18000-6C; and the RFID tag circuit is also configured to encrypt the vehicle exhaust data compliant with ISO18000-6C for secure data transmission, and output the encrypted vehicle exhaust data to the authenticated ETC server.

[0023] In one embodiment, a memory stores a plurality of OBD data request commands, and a processor is configured to select at least one OBD data request command from the plurality of OBD data request commands stored in the memory to form an OBD data request command set, and send the OBD data request command set to a Bluetooth communication circuit; and the Bluetooth communication circuit is configured to output the OBD data request command set to an OBD device in a first mode, thereby enabling a vehicle connected to the OBD device to output OBD data in response to the OBD data request command set.

[0024] In one embodiment, a memory stores a plurality of OBD data request command sets; a processor is configured to select an OBD data request command set from the plurality of OBD data request command sets stored in the memory, and send the OBD data request command set to a Bluetooth communication circuit; and the Bluetooth communication circuit is configured to output the OBD data request command set to an OBD device in a first mode, thereby enabling a vehicle connected to the OBD device to output OBD data in response to the OBD data request command set.

[0025] The beneficial effects of this application are as follows.

[0026] The electronic tag device can realize multiple functions to meet the actual needs of users.

[0027] In the first aspect, the electronic tag device can store multiple tag data sets corresponding to different geographical areas, obtain location data in real time or periodically and send the location data to the server. The server can output a tag data update instruction when it is determined that the current geographical area where the electronic tag device determined by the location data is located is different from the previously determined geographical area (that is, the geographical area of ​​the electronic tag device changes). The electronic tag device can obtain a target tag data set corresponding to the tag data update instruction from multiple tag data sets to complete the tag data update. Therefore, the electronic tag device disclosed in the present application is set on an object such as a vehicle, which can save the additional cost of toll settlement caused by the existing electronic tag device of the vehicle being bound to only one account information. This is conducive to the development of the car rental industry.

[0028] In the second aspect, the electronic tag device can be connected to the OBD interface of the vehicle to obtain the target OBD data; for example, the electronic tag device can be connected to the OBD interface of the vehicle through an external or built-in OBD device, and when the electronic tag device is connected to the OBD interface of the vehicle through the external OBD device, the electronic tag device can be connected to the external OBD device through a Bluetooth communication circuit; the electronic tag device can obtain the target OBD data based on the OBD data obtained from the vehicle, so that since the OBD data can be obtained, the electronic tag device can be used in a variety of application scenarios. In the application scenario, the processor of the electronic tag device can convert the target OBD data, the RFID tag circuit can store the converted target OBD data, the server can obtain the converted target OBD data through the RFID tag circuit, the server can be a certified electronic toll collection system (ETC) server, and the converted target OBD data can include vehicle exhaust data, and the certified ETC server can obtain the vehicle exhaust data from the RFID tag circuit, so it is convenient for relevant departments (such as traffic management departments or environmental protection departments) to monitor the carbon emissions of vehicles, and it is beneficial for relevant departments to manage vehicles. In another application scenario, the target OBD data may include basic vehicle parameters, such as fuel consumption, driving distance, odometer data, and fuel tank level; in a logistics company, when a vehicle driver (e.g., a truck driver) drives a truck equipped with an electronic tag device, the logistics company can understand the driving condition of the truck based on the target OBD data, thereby avoiding the problem of the truck driver stealing fuel (e.g., gasoline) on the way, and reducing the transportation cost of the logistics company. In yet another application scenario, the target OBD data may include vehicle fault diagnosis data, and vehicle maintenance personnel may directly obtain vehicle fault diagnosis data for vehicle fault diagnosis and vehicle maintenance, and the operation of obtaining data is simple and efficient. The electronic tag device may obtain the target OBD data based on the OBD data, and output the target OBD data through the RFID tag circuit, the cellular communication circuit, and / or the Bluetooth communication circuit, thereby meeting actual needs, and the application range of the electronic tag device is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to explain the embodiments of the present application or the technical solutions of the prior art more clearly, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained according to the structures shown in these drawings without paying creative labor.

[0030] Figure 1 The schematic diagram of the structure of the electronic tag device according to the embodiment of the present application is illustrated.

[0031] Figure 2The schematic diagram of the structure of the electronic tag device according to the embodiment of the present application is illustrated.

[0032] Figure 3 The schematic diagram of the structure of the electronic tag device according to the embodiment of the present application is illustrated.

[0033] Figure 4 The schematic diagram of the structure of the electronic tag device according to the embodiment of the present application is illustrated.

[0034] Figure 5 A schematic diagram illustrating an application scenario of an electronic tag device according to an embodiment of the present application.

[0035] Figure 6 A schematic block diagram of a circuit board of an electronic tag device according to an embodiment of the present application is illustrated.

[0036] Figure 7 A schematic block diagram of a circuit board of an electronic tag device according to an embodiment of the present application is illustrated.

[0037] Figure 8 A schematic block diagram of a circuit board of an electronic tag device according to an embodiment of the present application is illustrated.

[0038] Fig. 9 A schematic diagram illustrating another application scenario of the electronic tag device according to an embodiment of the present application.

[0039] The implementation of the objects, functional characteristics and advantages of the present application will be further described in conjunction with some embodiments with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should be within the scope of the present application.

[0041] In this application, unless otherwise specified and limited, the terms "connection", "setting", etc. should be understood in a broad sense. For example, the term "connection" can be a direct connection, an indirect connection through an intermediate medium, a fixed connection, a detachable connection, an integrated or an electrical connection. "Connection" can be a connection within two elements or an interactive relationship between two elements. Unless otherwise specified and limited, those skilled in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0042] In addition, the technical solutions in the various embodiments can be combined with each other, but must be based on the implementation of those skilled in the art. When the combination of technical solutions is contradictory or impossible, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection of this application.

[0043] like Figures 1 to 4 As shown, an embodiment of the present application provides an electronic label device 100. The electronic label device 100 includes a housing 10 and a circuit board 20. The housing 10 defines a receiving cavity 11. The circuit board 20 is detachably disposed in the receiving cavity 11.

[0044] In some embodiments, the housing 10 includes a first cover 13 and a second cover 15. The first cover 13 and the second cover 15 together define the accommodating cavity 11. The circuit board 20 is detachably connected to the second cover 15. The first cover 13 can be connected to the second cover 15 in a snap-fit ​​manner.

[0045] For example, the second cover 15 may include a plurality of positioning posts, each of which is provided with a thread, and the circuit board 20 defines a plurality of holes corresponding to the plurality of positioning posts. The plurality of positioning posts pass through the corresponding holes to position the circuit board 20, and the bolts may match the threads of the positioning posts to fix the circuit board 20 to the second cover 15.

[0046] like Figure 6 As shown, the circuit board 20 is provided with a controller 21 , a radio frequency identification (RFID) tag circuit 22 connected to the controller 21 , and a cellular communication and positioning circuit 23 connected to the controller 21 .

[0047] The controller 21 may be a system on chip (SOC) controller, the RFID tag circuit 22 may be an RFID tag chip, and the cellular communication and positioning circuit 23 may be a cellular communication and positioning circuit chip. In the illustrated embodiment, the SoC controller may be a chip having a model number of ESP32-C3, and the RFID tag chip may be The X-8K tag chip, and the cellular communication and positioning chip may be a chip with model number SARA-R510M8S.

[0048] In some embodiments, Figure 1 , Figure 2 , Figure 4 and Figure 8 As shown, the circuit board 20 is also provided with a first antenna connector 24 and a second antenna connector 25, which are electrically connected to the cellular communication and positioning circuit 23. Figure 3 and Figure 8As shown, the housing 10 defines a first through hole 16 and a second through hole 17, the first through hole 16 is configured to expose the first antenna connector 24 and allow the cellular communication antenna 30 to be connected to the first antenna connector 24, and the second through hole 17 is configured to expose the second antenna connector 25 and allow the global navigation satellite system (GNSS) antenna 40 to be connected to the second antenna connector 25.

[0049] In some embodiments, Figure 4 and Figure 8 As shown, the circuit board 20 is further provided with a power connector 26 exposed by the housing 10, and the power connector 26 is configured to be connected to a vehicle power source through a cigarette lighter plug 50. The vehicle power source may be a cigarette lighter.

[0050] In some embodiments, Figure 4 and Figure 8 As shown, the circuit board 20 is also provided with a light emitting diode (LED) indicator light 27 exposed by the housing 10. The LED indicator light 27 is configured to emit light of different colors for indicating different working states of the electronic label device 100. For example, when the electronic label device 100 is in a sleep mode, the LED indicator light 27 may emit light of a first color, when the electronic label device 100 is in a wake-up mode, the LED indicator light 27 may emit light of a second color, when the electronic label device 100 is in a startup mode, the LED indicator light 27 may emit light of a third color, or when the electronic label device 100 is in a power-off mode, the LED indicator light 27 may emit light of a fourth color.

[0051] In some embodiments, Figure 4 and Figure 8 As shown, the circuit board 20 is also provided with a peripheral interface 28 exposed by the housing 10. The peripheral interface 28 is configured to communicate with a host computer. The host computer may be a personal computer (PC). The peripheral interface 28 may include a universal serial bus (USB) type-C interface. In addition, the peripheral interface 28 may also include at least one of a general purpose input and output (GPIO) interface, a serial peripheral interface (SPI), a UART interface, an I2C interface, and an I2S interface. The present application does not limit the specific type of the peripheral interface 28, but may be set according to actual conditions.

[0052] In some embodiments, the circuit board 20 is further provided with a card slot 29, and the card slot 29 is configured to connect a subscriber identity module (SIM) card. The SIM card may be a 4th generation communication system (4G) long term evolution (LTE) Nano SIM card or other types of cards such as a 3G SIM card.

[0053] It is worth mentioning that the present application does not limit the specific positions of the aforementioned components on the circuit board 20, and the positions shown in the figures are only for a better understanding of the present application.

[0054] The electronic label device 100 enriches the functions of existing label devices and can be applied to various fields to meet the needs of users. Figure 5 and Figure 6 , the electronic tag device 100 is connected to the server 200 and the server 300 respectively, thereby, the electronic tag device 100 can communicate with the servers 200 and 300. The RFID tag circuit 22 can be configured to connect to the server 200, and the cellular communication and positioning circuit 23 can be configured to connect to the server 300.

[0055] Specifically, server 200 may be an independent physical server, or a server cluster or distributed system consisting of multiple physical servers, or a cloud server or server cluster that provides cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content distribution networks (CDNs), big data, artificial intelligence platforms, and other basic cloud computing services. Server 200 may be a personal server, an enterprise server, or a government server. It should be noted that the present application does not limit the type and source of server 200. Server 300 may be the same as server 200 or different from server 200. Server 300 may also be an independent physical server, or a server cluster or distributed system consisting of multiple physical servers, or a cloud server or server cluster that provides cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content distribution networks (CDNs), big data, artificial intelligence platforms, and other basic cloud computing services.

[0056] In the application, refer to Figure 5 and Figure 6 The controller 21 is configured to obtain target on-vehicle diagnostic (OBD) data from the vehicle and convert the target OBD data to obtain converted target OBD data that complies with ISO18000-6C, and the RFID tag circuit 22 is configured to obtain the converted target OBD data that complies with ISO18000-6C from the controller 21 and store the converted target OBD data that complies with ISO18000-6C, thereby allowing the server 200 to obtain the converted target OBD data that complies with ISO18000-6C from the RFID tag circuit 22.

[0057] In some embodiments, the target OBD data may include: basic vehicle parameters, vehicle exhaust emission parameters, vehicle fault diagnostic data and / or vehicle control data. The basic vehicle parameters may include: current data of the power system, vehicle identification number (VIN) and calibration identification number (CID). The vehicle exhaust emission parameters may include: oxygen sensor test data, catalyst test data and variable valve timing (VVT) test data. The vehicle fault diagnostic data may include: freeze frame data and confirmed diagnostic trouble codes (DTC). The current data of the power system may include but is not limited to engine coolant temperature, fuel control system status, fuel correction, ignition timing advance, intake temperature, manifold air pressure, air flow, engine speed, throttle position sensor output value, secondary air state, calculated load value, vehicle speed and fuel pressure. Freeze frame data (i.e., engine state data stored at the time of failure) may include but is not limited to calculated load value, engine speed, fuel correction value, fuel pressure, vehicle speed, coolant temperature, intake manifold pressure, closed loop or open loop operation state, and fault codes that cause the above data to be stored. In one embodiment, the target OBD data may comply with the second on-board diagnostics (OBD II) standard.

[0058] In another application, reference Figure 5 and Figure 6 The cellular communication and positioning circuit 23 is configured to obtain the current location data of the electronic tag device 100 and send the current location data to the server 300, so that the server 300 can output a tag data update instruction in response to the current geographical area where the electronic tag device 100 is located determined by the current location data being different from the previously determined geographical area. The cellular communication and positioning circuit 23 is configured to wirelessly receive the tag data update instruction from the server 300 and send the tag data update instruction to the controller 21; and the controller 21 is configured to obtain a target tag data set corresponding to the tag data update instruction from multiple tag data sets, and send the target tag data set to the RFID tag circuit 22 for tag data update.

[0059] In the following, the application of the electronic tag device 100 is described in detail by way of example.

[0060] With global warming, issues related to carbon emissions, mainly carbon dioxide emissions, are gaining more and more attention. The amount of carbon dioxide in automobile exhaust accounts for nearly a quarter of total carbon dioxide emissions. As the number of vehicles increases, carbon dioxide emissions will also increase. Therefore, it is necessary to detect and monitor vehicle carbon emissions so that traffic management departments or environmental protection departments can evaluate the implementation effect of traffic energy conservation and emission reduction measures, or find vehicles with excessive carbon emissions in the traffic system for supervision.

[0061] Based on this, reference Figure 5 and Figure 6 , the controller 21 of the electronic tag device 100 can obtain the first target OBD data from the vehicle, and convert the first target OBD data to obtain the converted first target OBD data that complies with ISO18000-6C, and the RFID tag circuit 22 can obtain the converted first target OBD data that complies with ISO18000-6C from the controller 21, and store the converted first target OBD data that complies with ISO18000-6C, thereby allowing the server 200 to obtain the converted first target OBD data that complies with ISO18000-6C from the RFID tag circuit 22.

[0062] The server 200 may be a certified electronic toll collection system (ETC) server, and the converted first target OBD data may include vehicle exhaust data that complies with ISO18000-6C. The certified ETC server may obtain vehicle exhaust data that complies with ISO18000-6C from the RFID tag circuit 22, which is convenient for relevant departments (such as traffic management departments or environmental protection departments) to monitor the carbon emissions of vehicles, thereby facilitating the management of vehicles by relevant departments. Therefore, the traffic management department or the environmental protection department can evaluate the implementation effect of traffic energy conservation and emission reduction measures, and find out vehicles with excessive carbon emissions in the traffic system for supervision.

[0063] In addition, currently, there is a problem of car drivers (such as truck drivers) stealing gasoline from logistics companies. That is, after driving a car, the truck driver will stop halfway to steal gasoline from the truck. Because logistics companies cannot monitor the use of gasoline, they cannot determine whether the truck driver steals gasoline, which leads to an increase in the company's operating costs.

[0064] Based on this, reference Figure 5 and Figure 6 , the controller 21 of the electronic tag device 100 can obtain the second target OBD data from the vehicle and send the second target OBD data to the cellular communication and positioning circuit 23 , thereby allowing the server 300 to obtain the second target OBD data from the cellular communication and positioning circuit 23 .

[0065] The second target OBD data may include basic vehicle parameters, such as fuel consumption, driving distance, odometer data, and fuel tank level. When a truck driver drives a truck equipped with the electronic tag device 100, the logistics company can understand the driving status of the truck by communicating with the server 300, thereby determining whether the truck driver steals gasoline, thereby avoiding the problem of the truck driver stealing gasoline and reducing the transportation cost of the logistics company.

[0066] In addition, refer to Figure 5 and Figure 6 , the controller 21 of the electronic tag device 100 can obtain the third target OBD data from the vehicle, and send the third target OBD data to the cellular communication and positioning circuit 23, thereby allowing the server 300 to obtain the third target OBD data from the cellular communication and positioning circuit 23. The third target OBD data may include vehicle fault diagnosis data, whereby the vehicle maintenance personnel can directly obtain the vehicle fault diagnosis data by communicating with the server 300, so as to facilitate vehicle fault diagnosis and vehicle maintenance, and the operation of obtaining data is simple and efficient.

[0067] In addition, at present, the non-stop electronic toll collection system is an advanced road toll collection system. By installing an electronic tag device on the vehicle, when the vehicle approaches the toll station, the electronic tag device and the toll station communicate with each other wirelessly, and then the vehicle can be recorded for subsequent toll settlement. However, in the United States, in the case where the electronic tag device of the vehicle is only bound to one account information, vehicles traveling through different geographical areas (such as vehicles traveling through different states in the United States) will encounter additional costs for toll settlement, which has a great impact on some industries (such as the car rental industry). Usually, car rentals are carried out at a fixed fee. When the renter drives the vehicle through different states, the vehicle will encounter additional costs, which need to be borne by the car rental company itself. In this way, the income and development of car rental companies will be greatly affected. For example, a car rental company registers an account for an electronic tag device in New Mexico, and the electronic tag device stores account information corresponding to New Mexico. A car equipped with an electronic tag device will not incur additional fees when driving in New Mexico. However, when the lessee drives the car from New Mexico to Texas, in addition to road tolls, the car will also incur additional fees when entering Texas. The additional fees are caused by the fact that the car's electronic tag device is only bound to the account information corresponding to New Mexico. The additional fees can be understood as processing fees generated by crossing different states, which greatly restricts the development of the car rental industry.

[0068] Based on this, the electronic tag device 100 can be installed on the vehicle, which can avoid the above-mentioned additional costs. Figure 5 and Figure 6, the cellular communication and positioning circuit 23 of the electronic tag device 100 can obtain the current location data of the electronic tag device 100 in real time or periodically, and send the current location data to the server 300, so that the server 300 can respond to the current geographical area where the electronic tag device 100 is located determined by the current location data being different from the previously determined geographical area (for example, in response to the vehicle traveling through different geographical areas) and output the tag data update instruction, the cellular communication and positioning circuit 23 is configured to wirelessly receive the tag data update instruction from the server 300, and send the tag data update instruction to the controller 21; and the controller 21 can obtain the target tag data set corresponding to the tag data update instruction from the multiple tag data sets, and send the target tag data set to the RFID tag circuit 22 for tag data update. That is, the RFID tag circuit 22 can update the previous tag data set to the target tag data set to complete the tag data update. Therefore, when the vehicle travels through different geographical areas, no additional costs are incurred because the non-local tag data (i.e., the previous tag data set) has been replaced by the local tag data (i.e., the target tag data set). The electronic tag device 100 can be installed on a vehicle to save the extra cost of toll settlement caused by the existing electronic tag device of the vehicle being bound to only one account information, which is beneficial to the development of the car rental industry.

[0069] Specifically, the previously determined geographical area may refer to the geographical area determined by the immediately previous location data, that is, the previously determined geographical area may be the immediately previously determined geographical area. The current geographical area where the electronic tag device 100 is located determined by the current location data is different from the previously determined geographical area, which can be understood as the geographical area where the electronic tag device 100 is located has changed, that is, the current location data is not within the data range of the previously determined geographical area, but within the data range of the current geographical area.

[0070] In the illustrated embodiment, each set of the plurality of tag data sets may include: an electronic product code (EPC) and a tag identifier (TID).

[0071] In the illustrated embodiment, the TIDs of the multiple tag data sets may include multiple account information corresponding to different geographical regions. The different geographical regions may be different administrative regions, such as different states in the United States (USA). The TID of the target tag data set may include one account information corresponding to the current geographical region among the multiple account information, and the current geographical region is one of the different geographical regions.

[0072] Specifically, the multiple account information corresponding to different geographical areas can be understood as the user registering accounts in different geographical areas respectively to store the multiple account information of the geographical areas.

[0073] For example, when the RFID tag circuit 22 of the electronic tag device 100 stores the account information of the geographic area A, when the vehicle equipped with the electronic tag device 100 travels in the geographic area A, no additional cost is incurred because the RFID tag circuit 22 stores the local tag data of the geographic area A. When the vehicle travels from the geographic area A to B, the RFID tag circuit 22 of the electronic tag device 100 can update the account information of the geographic area A to the account information of the geographic area B. At this time, because the RFID tag circuit 22 stores the local tag data of the geographic area B, there is no additional cost.

[0074] In some embodiments, Figure 6 and Figure 7 As shown, the controller 21 may include: a processor 211, a memory 212 and a Bluetooth communication circuit 213. The memory 212 may store information, such as the above-mentioned multiple tag data sets. The processor 211 is connected to the memory 212. The Bluetooth communication circuit 213 is connected to the processor 211.

[0075] In the illustrated embodiment, the processor 211 may be a microprocessor and the memory 212 may include static random access memory (SRAM) and read only memory (ROM).

[0076] In some embodiments, the Bluetooth communication circuit 213 has a first mode and a second mode. The Bluetooth communication circuit 213 is configured to wirelessly connect to the OBD device in the first mode and to wirelessly connect to the mobile terminal in the second mode. Fig. 9 , the Bluetooth communication circuit 213 can connect the OBD device 400 in the first mode, and can connect the mobile terminal 500 in the second mode. For example, the first mode of the Bluetooth communication circuit 213 can be the master mode, and the second mode of the Bluetooth communication circuit 213 can be the slave mode.

[0077] The OBD device 400 may be a Bluetooth OBD device. The mobile terminal 500 may be a smart phone (e.g., a phone with an Android operating system, a phone with an iPhone operating system (IOS)), a tablet computer, a laptop computer, a mobile Internet device (MID), a desktop computer, a smart appliance, a vehicle terminal (e.g., a vehicle navigation terminal, a vehicle computer, etc.), a smart watch, etc. It should be noted that the present application does not limit the specific type of the mobile terminal 500. For example, the mobile terminal 500 may be a user's smart phone.

[0078] Specifically, refer to Figures 6 to 9, the Bluetooth communication circuit 213 is configured to obtain OBD data from the vehicle 600 through the OBD device 400 in the first mode, and output the OBD data to the processor 211. The processor 211 is configured to obtain the first target OBD data based on the OBD data obtained from the Bluetooth communication circuit 213, and convert the data format of the first target OBD data to obtain the converted first target OBD data in accordance with ISO18000-6C. The RFID tag circuit 22 is configured to obtain the converted first target OBD data in accordance with ISO18000-6C from the processor 211, and store the converted first target OBD data in accordance with ISO18000-6C, thereby allowing the server 200 to obtain the converted first target OBD data in accordance with ISO18000-6C from the RFID tag circuit 22.

[0079] In some embodiments, the OBD data may include: basic vehicle parameters, vehicle exhaust emission parameters, vehicle fault diagnostic data and / or vehicle control data. The basic vehicle parameters may include: current data of the power system, VIN and CID. The vehicle exhaust emission parameters may include: oxygen sensor test data, catalyst test data and VVT test data. The vehicle fault diagnostic data may include: freeze frame data and confirmed DTC. The current data of the power system includes but is not limited to engine coolant temperature, fuel control system status, fuel correction, ignition timing advance, intake temperature, manifold air pressure, air flow, engine speed, throttle position sensor output value, secondary air state, calculated load value, vehicle speed and fuel pressure. Freeze frame data (i.e., engine status data stored at the time of failure) may include but is not limited to calculated load value, engine speed, fuel correction value, fuel pressure, vehicle speed, coolant temperature, intake manifold pressure, closed loop or open loop operation state, and fault codes that cause the above data to be stored. In one embodiment, the OBD data complies with the second on-vehicle diagnostic (OBD II) standard.

[0080] In one embodiment, the processor 211 is specifically configured to select at least some of the OBD data as the first target OBD data. In another embodiment, the processor 211 is specifically configured to calculate the first target OBD data based on at least some of the OBD data. The processor 211 can directly output the obtained OBD data as the first target OBD data, or calculate the first target OBD data based on the OBD data, so as to meet the needs of different OBD data in different scenarios.

[0081] In some embodiments, reference Figures 6 to 9The processor 211 is configured to obtain second target OBD data based on the OBD data obtained from the Bluetooth communication circuit 213, and send the second target OBD data to the cellular communication and positioning circuit 23, thereby allowing the server 300 to obtain the second target OBD data from the cellular communication and positioning circuit 23.

[0082] In some embodiments, the processor 211 is specifically configured to select at least some of the OBD data as the second target OBD data, or the processor 211 is specifically configured to calculate the second target OBD data based on at least some of the OBD data. The second target OBD data may be the same as or different from the first target OBD data.

[0083] In some embodiments, the cellular communication and positioning circuit 23 is specifically configured to receive the second target OBD data, encrypt the second target OBD data, and wirelessly send the encrypted second target OBD data to the server 300. In addition to the communication function, the cellular communication and positioning circuit 23 also has a data encryption function, which ensures the security of data transmission.

[0084] In some embodiments, the processor 211 may output different target OBD data to the RFID tag circuit 22 and the cellular communication and positioning circuit 23. In the illustrated embodiment, the processor 211 may obtain different target OBD data based on different OBD data, and then output the different target OBD data to the RFID tag circuit 22 and the cellular communication and positioning circuit 23. In another illustrated embodiment, the processor 211 may obtain different target OBD data based on the same OBD data, and then output the different target OBD data to the RFID tag circuit 22 and the cellular communication and positioning circuit 23.

[0085] In some embodiments, the processor 211 may output the same target OBD data to the RFID tag circuit 22 and the cellular communication and positioning circuit 23 .

[0086] In some embodiments, reference Figures 6 to 9 The processor 211 is configured to obtain third target OBD data based on the OBD data obtained from the Bluetooth communication circuit 213, and send the third target OBD data to the Bluetooth communication circuit 213; and the Bluetooth communication circuit 213 is configured to receive the third target OBD data, and output the third target OBD data to the mobile terminal 500 in the second mode for user viewing.

[0087] In some embodiments, the processor 211 is specifically configured to select at least some of the OBD data as the third target OBD data, or the processor 211 is specifically configured to calculate the third target OBD data based on at least some of the OBD data.

[0088] In some embodiments, the Bluetooth communication circuit 213 is specifically configured to receive the third target OBD data, encrypt the third target OBD data, and wirelessly send the encrypted third target OBD data to the mobile terminal 500. In addition to the communication function, the Bluetooth communication circuit 213 also has a data encryption function, which ensures the security of data transmission.

[0089] In some embodiments, the processor 211 may output different target OBD data to the RFID tag circuit 22, the cellular communication and positioning circuit 23, and the Bluetooth communication circuit 213. In the illustrated embodiment, the processor 211 may obtain different target OBD data based on different OBD data, and then output the different target OBD data to the RFID tag circuit 22, the cellular communication and positioning circuit 23, and the Bluetooth communication circuit 213. In another embodiment, the processor 211 may obtain different target OBD data based on the same OBD data, and then output the different target OBD data to the RFID tag circuit 22, the cellular communication and positioning circuit 23, and the Bluetooth communication circuit 213.

[0090] In some embodiments, the processor 211 may output the same target OBD data to the RFID tag circuit 22 , the cellular communication and positioning circuit 23 , and the Bluetooth communication circuit 213 .

[0091] Furthermore, in some embodiments, the OBD data may be obtained by the following method.

[0092] In the first method, the memory 212 may store a plurality of OBD data request commands, the processor 211 may select at least one OBD data request command from the plurality of OBD data request commands stored in the memory 212 to form an OBD data request command set, and transmit the OBD data request command set to the Bluetooth communication circuit 213. The Bluetooth communication circuit 213 may output the OBD data request command set to the OBD device 400 in the first mode, thereby enabling the vehicle 600 connected to the OBD device 400 to output OBD data in response to the OBD data request command set.

[0093] In the second method, the memory 212 can store multiple OBD data request command sets, the processor 211 can select an OBD data request command set from the multiple OBD data request command sets stored in the memory 212, and send the OBD data request command set to the Bluetooth communication circuit 213, and the Bluetooth communication circuit 213 can output the OBD data request command set to the OBD device 400 in the first mode, so that the vehicle 600 connected to the OBD device 400 can output OBD data in response to the OBD data request command set.

[0094] It is worth mentioning here that the above embodiment is illustrated by an external OBD device 400. In practical applications, the OBD device 400 can be built into the electronic tag device 100. In some embodiments, the processor 211 can communicate directly with the built-in OBD device to obtain OBD data, or the processor 211 can communicate with the built-in OBD device through the Bluetooth communication circuit 213 to obtain OBD data. For example, when the OBD device 400 is built into the electronic tag device 100, the OBD device 400 may include a CAN (abbreviation for controller area network) to UART (abbreviation for universal asynchronous receiver / transmitter) converter, which is connected to the processor 211 and configured to connect to the OBD interface of the vehicle, and the CAN to UART converter can perform data format conversion to facilitate the electronic tag device 100 to communicate with the vehicle 600.

[0095] In some embodiments, the Bluetooth communication circuit 213 may receive Bluetooth data from the mobile terminal 500, convert the Bluetooth data to obtain converted Bluetooth data, and send the converted Bluetooth data to the processor 211. The processor 211 may store the converted Bluetooth data in the memory 212.

[0096] In some embodiments, the processor 211 may obtain the data to be displayed from the memory 212 and send the data to be displayed to the Bluetooth communication circuit 213. The Bluetooth communication circuit 213 may receive the data to be displayed, convert the data to be displayed, and then output the converted data to be displayed to the mobile terminal 500 for the user to view.

[0097] The electronic tag device 100 communicates with the mobile terminal 500 via the Bluetooth communication circuit 213, which can send the data that the user needs to view to the mobile terminal 500 via the Bluetooth communication circuit 213, and store new data in the electronic tag device 100 via the Bluetooth communication circuit 213, so that the user can understand the relevant information of the electronic tag device 100 and operate the electronic tag device 100.

[0098] In the illustrated embodiment, the Bluetooth communication circuit 213 may include: a Bluetooth antenna and a Bluetooth transceiver connected to the Bluetooth antenna. The Bluetooth transceiver may be connected to the processor 211.

[0099] In some embodiments, Figures 6 to 9 As shown, the cellular communication and positioning circuit 213 may include: a cellular communication circuit 231 and a positioning circuit 233. The cellular communication circuit 231 is connected to the positioning circuit 233 and the processor 211.

[0100] The positioning circuit 233 supports at least one selected from the group consisting of a global positioning system (GPS), a BeiDou navigation satellite system (BDS), a Galileo satellite navigation system (GALILEO), and a GLONASS satellite navigation system (GLONASS).

[0101] The positioning circuit 233 is configured to obtain the current location data of the electronic tag device 100 and send the current location data to the cellular communication circuit 231. The cellular communication circuit 231 is configured to receive the current location data and wirelessly send the current location data to the server 300, so that the server 300 can output a tag data update instruction in response to the current geographical area where the electronic tag device 100 is located determined by the current location data being different from the previously determined geographical area, and the cellular communication circuit is configured to wirelessly receive the tag data update instruction from the server 300 and send the tag data update instruction to the processor 211.

[0102] In the illustrated embodiment, the cellular communication circuit 231 is specifically configured to receive current location data, encrypt the current location data, and wirelessly transmit the encrypted current location data to the server 300. In addition to the communication function, the cellular communication circuit 231 also has a data encryption function, which ensures the security of data transmission.

[0103] In the illustrated embodiment, the cellular communication circuit 231 is specifically configured to wirelessly receive the tag data update instruction encrypted by the server 300, decrypt the received tag data update instruction, and send the decrypted tag data update instruction to the processor 211. In addition to the communication function, the cellular communication circuit 231 also has a data decryption function, which ensures the security of data transmission.

[0104] In some embodiments, Figure 7 and Figure 8 As shown, the cellular communication circuit 231 may include: a baseband processor 2311 and a radio frequency (RF) transceiver 2313. The baseband processor 2311 may be provided with a SIM interface, and the SIM interface is configured to connect a SIM card 60. The RF transceiver 2313 is connected to the baseband processor 2311 and the cellular communication circuit 30. The positioning circuit 233 is connected to the baseband processor 2311.

[0105] The baseband processor 2311 may have the above-mentioned communication function of the cellular communication circuit 231 , and further have the above-mentioned data encryption function and data decryption function of the cellular communication circuit 231 .

[0106] In the illustrated embodiment, Figure 8By way of example, the positioning circuit 233 may include: a GNSS IC 2331 connected to the cellular communication circuit 231 ; and a GNSS antenna 40 . Specifically, the GNSS IC 2331 is connected to the baseband processor 2311 of the cellular communication circuit 231 .

[0107] For example, the GNSS IC 2331 may be a GPS IC, and the GNSS antenna 40 may be a GPS antenna. The GNSS IC 2331 may be a chip with a model number of UBX-M8.

[0108] It is worth mentioning that the present application does not limit the specific composition of the above-mentioned elements (eg, cellular communication circuit 231, positioning circuit 233, and Bluetooth communication circuit 213), and other compositions that can achieve the same functions are also included in the present application.

[0109] In summary, the electronic tag device 100 provided in the present application has a simple structure, is easy to carry and install, has multiple functions, can adapt to different application scenarios, and meet the needs of different users.

[0110] The above are only some embodiments of the present application, and are not intended to limit the scope of the present application. Without departing from the spirit and scope of the present application, the present application will also have various changes and improvements. Under the public concept of the present application, equivalent structural changes made by using the specification and drawings of the present application, which are directly or indirectly applied to other related technical fields, are all included in the scope of the patent protection of the present application.

Claims

1. An electronic label device, comprising: a housing defining a receiving chamber; and A circuit board, which is detachably disposed in the accommodating cavity; wherein the circuit board is provided with a controller, a radio frequency identification RFID tag circuit connected to the controller, and a cellular communication and positioning circuit connected to the controller; Wherein, the controller is configured to obtain first target on-vehicle diagnostic OBD data from the vehicle, and convert the first target OBD data to obtain converted first target OBD data that complies with ISO18000-6C; and the RFID tag circuit is configured to obtain the converted first target OBD data that complies with ISO18000-6C from the controller, and store the converted first target OBD data that complies with ISO18000-6C, thereby allowing the first server to obtain the converted first target OBD data that complies with ISO18000-6C from the RFID tag circuit; Wherein, the cellular communication and positioning circuit is configured to obtain the current location data of the electronic tag device and send the current location data to the second server, so that the second server can output a tag data update instruction in response to the current geographical area where the electronic tag device is located determined by the current location data being different from the previously determined geographical area, the cellular communication and positioning circuit is configured to wirelessly receive the tag data update instruction from the second server and send the tag data update instruction to the controller; and the controller is configured to obtain a target tag data set corresponding to the tag data update instruction from a plurality of tag data sets, and send the target tag data set to the RFID tag circuit for tag data update; Wherein, the circuit board is also provided with a first antenna connector and a second antenna connector, which are electrically connected to the cellular communication and positioning circuit; and wherein the shell defines a first through hole and a second through hole; and the first through hole is configured to expose the first antenna connector and allow a cellular communication antenna to be connected to the first antenna connector, and the second through hole is configured to expose the second antenna connector and allow a global navigation satellite system GNSS antenna to be connected to the second antenna connector.

2. The electronic label device according to claim 1, wherein: The housing comprises: first cover; and a second cover detachably connected to the first cover and cooperating with the first cover to define the accommodating cavity; Wherein, the circuit board is detachably connected to the second cover.

3. The electronic label device according to claim 1, wherein: The circuit board is also provided with a power connector exposed by the housing, and the power connector is configured to be connected to a vehicle power supply through a cigarette lighter plug.

4. The electronic label device according to claim 1, wherein: The circuit board is also provided with a light emitting diode (LED) indicator light exposed by the housing; and the LED indicator light is configured to emit light of different colors for indicating different working states of the electronic label device; and Wherein, the circuit board is also provided with a peripheral interface exposed by the housing; and the peripheral interface is configured to communicate with a host computer; and The circuit board is also provided with a card slot, and the card slot is configured to connect a subscriber identity module SIM card.

5. The electronic label device according to claim 1, wherein: The controller is a system on chip (SOC) controller and comprises: A memory storing the plurality of label data sets; a processor connected to the memory; and a Bluetooth communication circuit connected to the processor; The Bluetooth communication circuit has a first mode and a second mode; and the Bluetooth communication circuit is configured to wirelessly connect to the OBD device in the first mode and to wirelessly connect to the mobile terminal in the second mode.

6. The electronic label device according to claim 5, wherein: The Bluetooth communication circuit is configured to obtain OBD data from the vehicle through the OBD device in the first mode and output the OBD data to the processor; wherein the processor is configured to obtain the first target OBD data based on the OBD data obtained from the Bluetooth communication circuit, and convert the data format of the first target OBD data to obtain the converted first target OBD data that complies with ISO18000-6C; and The OBD data includes: static data, which includes a vehicle identification number VIN; and dynamic data, which includes at least one of a fuel tank level, odometer data, and vehicle exhaust emission parameters.

7. The electronic label device according to claim 6, wherein: The vehicle exhaust emission parameters include: oxygen sensor test data, catalyst test data and variable valve timing (VVT) test data; and the OBD data also includes: vehicle fault diagnosis data and vehicle control data.

8. The electronic label device according to claim 6, wherein: The processor is further configured to obtain second target OBD data based on the OBD data obtained from the Bluetooth communication circuit, and send the second target OBD data to the cellular communication and positioning circuit, thereby allowing the second server to obtain the second target OBD data from the cellular communication and positioning circuit.

9. The electronic label device according to claim 8, wherein: The cellular communication and positioning circuit is specifically configured to receive the second target OBD data, encrypt the second target OBD data, and wirelessly transmit the encrypted second target OBD data to the second server.

10. The electronic label device according to claim 8, wherein: The processor is further configured to obtain third target OBD data based on the OBD data obtained from the Bluetooth communication circuit, and send the third target OBD data to the Bluetooth communication circuit; and The Bluetooth communication circuit is configured to receive the third target OBD data and output the third target OBD data to the mobile terminal in the second mode.

11. The electronic label device according to claim 10, wherein: The Bluetooth communication circuit is specifically configured to receive the third target OBD data, encrypt the third target OBD data, and wirelessly transmit the encrypted third target OBD data to the mobile terminal in the second mode.

12. The electronic label device according to claim 1, wherein: Each set of the plurality of tag data sets includes: an electronic product code EPC and a tag identifier TID.

13. The electronic label device according to claim 12, wherein: The TIDs of the multiple tag data sets include multiple account information corresponding to different geographical areas respectively, and the TID of the target tag data set includes one account information among the multiple account information corresponding to the current geographical area, and the current geographical area is one of the different geographical areas.

14. The electronic label device according to claim 1, wherein: The cellular communication and positioning circuit comprises: a positioning circuit that supports at least one selected from the group consisting of a global positioning system GPS, a BeiDou navigation satellite system BDS, a Galileo satellite navigation system GALILEO, and a GLONASS satellite navigation system; and a cellular communication circuit connected to the positioning circuit; Wherein, the positioning circuit is configured to obtain the current position data of the electronic tag device and send the current position data to the cellular communication circuit; and Wherein, the cellular communication circuit is configured to receive the current location data, and wirelessly send the current location data to the second server, so that the second server can output the label data update instruction in response to the current geographical area where the electronic tag device is located determined by the current location data being different from the previously determined geographical area, and the cellular communication circuit is configured to wirelessly receive the label data update instruction from the second server, and send the label data update instruction to the controller.

15. The electronic label device according to claim 14, wherein: The cellular communication circuit comprises: A baseband processor, which is provided with a SIM interface; wherein the SIM interface is configured to connect to a SIM card; and A radio frequency (RF) transceiver connected to the baseband processor; Wherein, the positioning circuit is connected to the baseband processor.

16. The electronic label device according to claim 1, wherein: The first server is an authenticated electronic toll collection system (ETC) server, and the converted first target OBD data includes vehicle exhaust data compliant with ISO18000-6C; and the RFID tag circuit is also configured to encrypt the vehicle exhaust data compliant with ISO18000-6C for secure data transmission, and output the encrypted vehicle exhaust data to the authenticated ETC server.

17. The electronic label device according to claim 6, wherein: The memory stores a plurality of OBD data request commands; wherein the processor is configured to select at least one OBD data request command from the plurality of OBD data request commands stored in the memory to form an OBD data request command set, and send the OBD data request command set to the Bluetooth communication circuit; and The Bluetooth communication circuit is configured to output the OBD data request command set to the OBD device in the first mode, so that the vehicle connected to the OBD device can output the OBD data in response to the OBD data request command set.

18. The electronic label device according to claim 6, wherein: The memory stores a plurality of OBD data request command sets; wherein the processor is configured to select an OBD data request command set from the plurality of OBD data request command sets stored in the memory, and send the OBD data request command set to the Bluetooth communication circuit; and The Bluetooth communication circuit is configured to output the OBD data request command set to the OBD device in the first mode, so that the vehicle connected to the OBD device can output the OBD data in response to the OBD data request command set.

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