Distributed passive sensing tag

Abstract

The utility model provides a distributed passive sensing tag which can be applied to the technical field of sensing tag detection. The distributed passive sensing tag comprises a tag antenna used for receiving an electromagnetic wave signal sent by a controller and sending target sampling data acquired by a sensing module to the controller; the tag circuit is used for converting the electromagnetic wave signal into a target electric signal and supplying power to the sensing module by using the target electric signal so as to enable the sensing module to work normally; wherein the sensing module is arranged at a preset position corresponding to a to-be-measured target and is used for carrying out data acquisition on the to-be-measured target to obtain target sampling data; the distributed connection module is used for electrically connecting the tag circuit and the sensing module so as to supply power to the sensing module and enable data transmission between the tag circuit and the sensing module; wherein the tag antenna, the tag circuit and the distributed connection module can move in any direction relative to the sensing module.

Description

Technical Field

[0001] This utility model relates to the field of sensor tag detection technology, and more specifically to a distributed passive sensor tag. Background Technology

[0002] With the rapid development of IoT technology, RFID technology has attracted widespread attention due to its low power consumption, low cost, and passive operation. Passive sensor tags based on RFID technology have the advantages of low power consumption, low cost, and maintenance-free operation. However, passive sensor tags need to collect energy from the control terminal to function properly.

[0003] In the process of realizing the above-mentioned inventive concept, it was found that due to the limitations of the application environment of passive sensor tags, existing passive sensor tags are difficult to collect energy, making it difficult to measure the physical information inside an object. Furthermore, existing passive sensor tags are difficult to measure multiple physical information of an object. Therefore, when multiple physical information needs to be measured, a large number of passive sensor tags are required, resulting in high costs and making it difficult to widely apply them to industrial production. Utility Model Content

[0004] In view of the above problems, this utility model provides a distributed passive sensing tag.

[0005] According to a first aspect of this utility model, a distributed passive sensing tag is provided, comprising: a tag antenna, a tag circuit, and a distributed connection module; the tag antenna is disposed outside the target under test, for receiving electromagnetic wave signals emitted by a controller and sending target sampling data collected by a sensing module to the controller; the tag circuit is electrically connected to the tag antenna, for converting the electromagnetic wave signals into target electrical signals, and using the target electrical signals to power the sensing module so that the sensing module can operate normally; wherein, the sensing module is disposed at a predetermined position corresponding to the target under test, for collecting data from the target under test to obtain target sampling data; the distributed connection module is electrically connected to the tag circuit, for electrically connecting the tag circuit and the sensing module to power the sensing module and enable data transmission between the tag circuit and the sensing module; wherein, the tag antenna, the tag circuit, and the distributed connection module are movable relative to the sensing module in any direction.

[0006] According to an embodiment of this utility model, the distributed connection module includes a connection pipe, an interface, and a connection line; the connection pipe is disposed below the tag antenna and is used to store and protect the tag circuit and the connection line; the interface is disposed on the outer wall of the connection pipe and is used to electrically connect the connection line inside the connection pipe to the sensing module through the interface; the connection line is used to electrically connect the tag circuit and the sensing module so that the target electrical signal can supply power to the sensing module through the connection line and maintain data transmission between the tag circuit and the sensing module.

[0007] According to an embodiment of this utility model, the connecting pipe is a retractable plastic pipe.

[0008] According to an embodiment of this utility model, the tag circuit includes a conversion module, a demodulation module, a processor, and a modulation module. The conversion module, electrically connected to the tag antenna, converts electromagnetic wave signals into target electrical signals to power the processor and sensing module, enabling data transmission between the sensing module and the processor. The demodulation module, electrically connected to the conversion module, demodulates the electromagnetic wave signals to obtain and send a baseband signal to the processor, enabling the processor to send data acquisition commands to the sensing module. The processor, electrically connected to the conversion and demodulation modules, responds to normal power supply from the target electrical signal to the processor, and, based on a wireless communication protocol, sends data acquisition commands to the sensing module according to the baseband signal, and receives target sampling data sent by the sensing module. The modulation module, electrically connected to the processor and the tag antenna, performs backscatter modulation on the target sampling data to obtain and send target modulation data to the tag antenna, enabling the tag antenna to send the target modulation data to the control terminal.

[0009] According to an embodiment of this utility model, the conversion module includes a power divider submodule, a conversion submodule, and a voltage regulator submodule; the power divider submodule is electrically connected to the matching submodule and is used to send electromagnetic wave signals to the conversion submodule and the demodulation module; the conversion submodule is electrically connected to the power divider submodule and is used to convert and process the electromagnetic wave signals emitted by the power divider submodule to obtain an initial electrical signal; the voltage regulator submodule is electrically connected to the conversion submodule and is used to regulate the voltage of the initial electrical signal to obtain a target electrical signal.

[0010] According to an embodiment of the present invention, the conversion module further includes a matching submodule, which is electrically connected to the tag antenna and is used to match the impedance between the tag antenna and the power divider submodule so as to transmit the electromagnetic wave signal to the power divider submodule without losing power.

[0011] According to an embodiment of this utility model, the conversion submodule includes: a rectifier unit and an energy harvesting and management unit; the rectifier unit is electrically connected to the power divider submodule and is used to convert the electromagnetic wave signal emitted by the power divider submodule to obtain a DC signal; the energy harvesting and management unit is electrically connected to the rectifier unit and is used to boost the DC signal to obtain an initial electrical signal.

[0012] According to an embodiment of this utility model, the demodulation module includes a detector submodule, a low-pass submodule, and a comparator submodule. The detector submodule is electrically connected to the power divider submodule and is used to filter the electromagnetic wave signal emitted by the power divider submodule to obtain an analog modulation signal. The low-pass submodule is electrically connected to the detector submodule and is used to filter out the DC offset in the analog modulation signal to obtain the target analog modulation signal. The comparator submodule is electrically connected to the low-pass submodule, the voltage regulator submodule, and the processor and is used to perform analog-to-digital conversion on the target analog modulation signal to obtain a baseband signal when the voltage regulator submodule supplies power to the comparator submodule.

[0013] According to an embodiment of the present invention, the processor includes a bus communication module, which includes a sensor module interface. The sensor module interface includes a power interface, a ground interface, and a data bus interface, so as to facilitate electrical connection between the sensor module and the sensor module interface. The processor supplies power to the sensor module and controls the sensor module to collect and transmit target sampling data.

[0014] According to an embodiment of the present invention, the tag circuit further includes an energy storage capacitor, which is electrically connected to the energy harvesting and management unit and is used to store an initial electrical signal so as to supply power to the processor, comparator submodule and sensing module.

[0015] According to this utility model, the distributed passive sensing tag includes a tag antenna, a tag circuit, and a distributed connection module. The tag antenna is electrically connected to the tag circuit, and the tag circuit is electrically connected to the distributed connection module. The tag circuit can be located within the distributed connection module, and the tag antenna, tag circuit, and distributed connection module can move relative to the sensing module in any direction. When it is necessary to detect the target, the tag antenna needs to be located outside the target to facilitate the collection of electromagnetic waves sent by the control terminal, avoiding insufficient electromagnetic wave collection that could cause the distributed passive sensing tag and sensing module to malfunction. The distributed connection module electrically connects the tag circuit and the sensing module. When the tag circuit converts the electromagnetic waves into a target electrical signal, the target electrical signal is used to power the sensing module, enabling the sensing module to operate normally and allowing data transmission between the sensor and the tag circuit. This invention eliminates the need to integrate distributed passive sensor tags and sensor modules. When the target to be tested needs to be detected, the number of sensor modules is determined based on the number of targets, and multiple sensor modules are connected to the tag circuit using a distributed connection module. This allows for simultaneous measurement of multiple targets or multiple locations of targets using a single distributed passive sensor tag, improving measurement efficiency and quality, reducing measurement costs, facilitating long-term detection of targets, and enhancing the stability and reliability of the tag.

[0016] According to an embodiment of this utility model, since the tag antenna, tag circuit, and distributed connection module can move relative to the sensing module in any direction, the position of the sensing module can be flexibly adjusted. When detecting multiple targets, while keeping the tag antenna outside the multiple targets, the position of the sensing module can be flexibly adjusted according to the test requirements, improving the detection flexibility and making it widely applicable to industrial production. Attached Figure Description

[0017] The above-mentioned contents, other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0018] Figure 1 An application scenario diagram of the distributed passive sensing tag according to an embodiment of the present utility model is shown;

[0019] Figure 2 A schematic diagram of a distributed passive sensing tag according to an embodiment of the present invention is shown;

[0020] Figure 3 A schematic diagram of a distributed passive sensing tag connected to multiple sensors according to an embodiment of the present invention is shown;

[0021] Figure 4 A schematic diagram illustrating the detection of multiple targets using distributed passive sensing tags and sensors according to an embodiment of the present invention is shown.

[0022] Figure 5 A schematic diagram of the processor write timing according to an embodiment of the present invention is shown;

[0023] Figure 6 A schematic diagram of the processor read timing according to an embodiment of the present invention is shown;

[0024] Figure 7 A schematic diagram of a tag circuit and multiple sensors according to an embodiment of the present invention is shown;

[0025] Figure 8 A flowchart illustrating a method for collecting data from a target according to an embodiment of the present invention is shown;

[0026] Figure 9 A schematic diagram illustrating the workflow of a distributed passive sensing tag according to an embodiment of the present invention is shown.

[0027] Figure 10 A schematic diagram illustrating the entire process of collecting data from the target under test according to an embodiment of the present invention is shown; Detailed Implementation

[0028] The embodiments of the present invention will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, numerous specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the present invention.

[0029] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0030] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0031] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).

[0032] With the rapid development of IoT technology, more and more fields are looking to achieve ubiquitous connectivity through low-power, low-cost methods. Active sensing tags suffer from high cost and power consumption, requiring frequent battery replacements, resulting in significant workload and maintenance costs, and reduced system reliability. Consequently, Radio Frequency Identification (RFID) technology has gained widespread attention due to its low-power, low-cost, and passive operation. Wireless sensor networks based on RFID technology offer advantages such as low power consumption, low cost, and maintenance-free operation.

[0033] However, passive sensor tags based on RFID technology require energy emitted by the control unit to function properly. Their operating distance is much shorter than the data communication distance, especially in environments with obstructions or metal, where severely obstructed tags struggle to collect energy, or even fail to collect energy at all, thus reducing their reliability and hindering normal operation. Research during the development process revealed that the limitations of the application environment for passive sensor tags make it difficult for existing tags to collect energy, thus hindering the measurement of internal physical information of objects. Furthermore, existing passive sensor tags cannot measure multiple physical parameters of an object, requiring a large number of passive sensor tags to measure multiple parameters, resulting in high costs and limiting their widespread application in industrial production.

[0034] In view of this, embodiments of the present invention provide a distributed passive sensing tag, comprising: a tag antenna, a tag circuit, and a distributed connection module; the tag antenna, disposed outside the target under test, is used to receive electromagnetic wave signals emitted by a controller and to send target sampling data collected by a sensing module to the controller; the tag circuit, electrically connected to the tag antenna, is used to convert the electromagnetic wave signals into target electrical signals and use the target electrical signals to power the sensing module so that the sensing module can operate normally; wherein, the sensing module is disposed at a predetermined position corresponding to the target under test and is used to collect data from the target under test to obtain target sampling data; the distributed connection module, electrically connected to the tag circuit, is used to electrically connect the tag circuit and the sensing module to facilitate power supply to the sensing module and data transmission between the tag circuit and the sensing module; wherein, the tag antenna, the tag circuit, and the distributed connection module are movable relative to the sensing module in any direction.

[0035] According to an embodiment of the present invention, there is a tag antenna, a tag circuit, and a distributed connection module.

[0036] According to an embodiment of the present invention, the tag antenna is disposed outside the target to be tested, and is used to receive electromagnetic wave signals emitted by the controller and send target sampling data collected by the sensing module to the controller.

[0037] According to embodiments of this utility model, the controller can be a reader / writer or a data collector.

[0038] According to an embodiment of this utility model, the target to be tested can be characterized as the goods to be tested. When there are multiple goods to be tested that need to be detected, the tag antenna needs to be set outside the multiple targets to be tested so that the tag antenna can receive the electromagnetic wave signal emitted by the controller, thereby obtaining energy so that the tag antenna and the sensing module can work normally.

[0039] According to an embodiment of this utility model, the tag circuit is electrically connected to the tag antenna to convert electromagnetic wave signals into target electrical signals, and uses the target electrical signals to power the sensing module so that the sensing module can work normally.

[0040] According to an embodiment of the present invention, the sensing module is set at a predetermined position corresponding to the target to be measured, and is used to collect data from the target to obtain target sampling data.

[0041] According to an embodiment of this utility model, the tag circuit does not need to be located outside the target to be tested.

[0042] According to embodiments of this utility model, the number of sensing modules can be set according to the detection requirements of the goods to be tested. By distributively connecting the sensing modules with distributed passive sensing tags, it is not necessary to integrate the sensing modules with the distributed passive sensing tags. This allows the tag antenna to be placed outside the target to be tested, and the number of sensing modules can be set according to specific detection requirements. This allows the distributed passive sensing tags to simultaneously measure multiple goods to be tested or multiple locations of the goods to be tested, reducing costs and improving efficiency.

[0043] According to an embodiment of the present invention, the distributed connection module is electrically connected to the tag circuit to electrically connect the tag circuit and the sensing module, so as to supply power to the sensing module and enable data transmission between the tag circuit and the sensing module.

[0044] According to an embodiment of this utility model, the tag circuit can be located within the distributed connection module, which protects the tag circuit. The distributed connection module does not need to be located outside the target under test.

[0045] According to an embodiment of the present invention, the tag antenna, tag circuit, and distributed connection module can be moved in any direction relative to the sensing module.

[0046] According to an embodiment of this utility model, the distributed passive sensing tag includes a tag antenna, a tag circuit, and a distributed connection module. The tag antenna is electrically connected to the tag circuit, and the tag circuit is electrically connected to the distributed connection module. The tag circuit can be located within the distributed connection module, and the tag antenna, tag circuit, and distributed connection module can move relative to the sensing module in any direction. When it is necessary to detect the target, the tag antenna needs to be located outside the target to facilitate the collection of electromagnetic waves sent by the control terminal, avoiding insufficient electromagnetic wave collection that could cause the distributed passive sensing tag and sensing module to malfunction. The distributed connection module electrically connects the tag circuit and the sensing module. When the tag circuit converts the electromagnetic waves into a target electrical signal, the target electrical signal is used to power the sensing module, enabling the sensing module to function normally and allowing data transmission between the sensor and the tag circuit. This invention eliminates the need to integrate distributed passive sensor tags and sensor modules. When the target to be tested needs to be detected, the number of sensor modules is determined based on the number of targets, and multiple sensor modules are connected to the tag circuit using a distributed connection module. This allows for simultaneous measurement of multiple targets or multiple locations of targets using a single distributed passive sensor tag, improving measurement efficiency and quality, reducing measurement costs, facilitating long-term detection of targets, and enhancing the stability and reliability of the tag.

[0047] According to an embodiment of this utility model, since the tag antenna, tag circuit, and distributed connection module can move relative to the sensing module in any direction, the position of the sensing module can be flexibly adjusted. When detecting multiple targets, while keeping the tag antenna outside the multiple targets, the position of the sensing module can be flexibly adjusted according to the test requirements, improving the detection flexibility and making it widely applicable to industrial production.

[0048] Figure 1 The diagram illustrates an application scenario of a distributed passive sensing tag according to an embodiment of the present invention.

[0049] like Figure 1 As shown, the application scenario according to this embodiment may include a distributed passive sensor tag 101, a sensing module 102, a target under test 103, and a controller 104. The distributed passive sensor tag 101 is used to receive electromagnetic wave signals emitted by the controller 104 and send target sampling data collected by the sensing module 102 to the controller 104.

[0050] Users can interact with controller 104 using distributed passive sensor tag 101 to receive or send signals, etc.

[0051] The controller 104 may be a controller that transmits electromagnetic wave signals, such as receiving and processing digital signals transmitted by the distributed passive sensor tag 101 (for example only). The controller 104 may also receive target sampling data, perform analysis and other processing on the target sampling data, and feed back the processing results (such as the state data of the target under test) to the terminal device.

[0052] According to an embodiment of this utility model, when it is necessary to detect the target 103, the controller 104 sends an electromagnetic wave signal to the distributed passive sensor tag 101. The distributed passive sensor tag 101 converts the received electromagnetic wave signal into a target electrical signal and uses the target electrical signal to power the sensing module 102. The sensing module 102 sends the collected target sampling data to the distributed passive sensor tag 101, and the distributed passive sensor tag 101 sends the target sampling data to the controller 104 so that the controller 104 can process and analyze it.

[0053] Figure 2 A schematic diagram of a distributed passive sensing tag according to an embodiment of the present invention is shown.

[0054] like Figure 2 As shown, the distributed passive sensing tag includes a tag antenna 201, a tag circuit 202, and a distributed connection module 203. The tag antenna 201 is electrically connected to the tag circuit 202, and the tag circuit 202 is electrically connected to the distributed connection module 203 and is disposed inside the distributed connection module 203.

[0055] According to an embodiment of the present invention, the distributed connection module includes a connection pipe, an interface, and a connection line.

[0056] According to an embodiment of this utility model, the connecting pipe can be located below the tag antenna to store and protect the tag circuit and connecting wires.

[0057] According to an embodiment of this utility model, the connecting pipe can be a retractable pipe, and the material of the connecting pipe can be made of materials such as plastic that have no effect on electromagnetic waves, without specific limitations.

[0058] According to an embodiment of the present invention, the interface can be set on the outer wall of the connecting pipe, so that the connecting wire inside the connecting pipe can be electrically connected to the sensing module through the interface.

[0059] According to an embodiment of the present invention, the outer wall of the connecting pipe may have multiple interfaces, so that multiple interfaces can be used according to the detection requirements, and the connecting wires inside the connecting pipe can be electrically connected to each sensing module through each interface.

[0060] According to an embodiment of this utility model, the interface can be spirally arranged on the outer wall of the connecting pipe, or it can be arranged side by side on the outer wall of the connecting pipe, without any specific limitation.

[0061] According to an embodiment of the present invention, the connecting line is used to electrically connect the tag circuit and the sensing module so that the target electrical signal can supply power to the sensing module through the connecting line and maintain data transmission between the tag circuit and the sensing module.

[0062] According to an embodiment of the present invention, the connecting wire can be disposed inside the connecting pipe, one end of the connecting wire can be electrically connected to the tag circuit, and the other end of the connecting wire can be electrically connected to the sensing module through an interface.

[0063] According to an embodiment of this utility model, the distributed connection module includes a connecting pipe, an interface, and connecting wires. The connecting pipe is located below the tag antenna, the interface is located on the outer wall of the connecting pipe, and the connecting wires can be located inside the connecting pipe. The interface allows the connecting wires to pass through the connecting pipe, enabling electrical connection between the tag circuit and the sensing module. This allows the target electrical signal to supply power to the sensing module via the connecting wires, maintaining data transmission between the tag circuit and the sensing module. This allows the distributed passive sensing tag and the sensing module to be decoupled. By using the number of interfaces and connecting wires, one distributed connection module can be connected to multiple sensing modules. This allows for simultaneous measurement of multiple targets or multiple locations of targets using a single distributed passive sensing tag, improving measurement efficiency and quality while reducing measurement costs.

[0064] Figure 3 A schematic diagram of a distributed passive sensing tag connected to multiple sensors according to an embodiment of the present invention is shown.

[0065] like Figure 3 As shown, the distributed passive sensing tag connected to multiple sensors includes a tag antenna 201, a tag circuit 202, a connecting pipe 301, multiple interfaces 302, multiple connecting lines 303, and multiple sensing modules 102. The tag antenna 201 and the tag circuit 202 are electrically connected. The connecting pipe 301 is located below the tag antenna 201. The tag circuit 202 and the connecting lines 303 are disposed inside the connecting pipe 301. The interfaces 302 are located on the outer wall of the connecting pipe 301. The connecting lines 303 electrically connect the tag circuit 202 and the sensing modules 102.

[0066] According to an embodiment of the present invention, the predetermined position may include the internal position of the target to be measured and the external position of the target to be measured.

[0067] According to an embodiment of this utility model, the sensing module is located inside the target under test and is electrically connected to the tag circuit in the connecting pipe through a connecting line passing through the target under test. It is used to collect data from the target under test in response to the collection command issued by the tag circuit, obtain the target sampling data and send it to the tag circuit so that the tag antenna can send the target sampling data to the controller.

[0068] According to an embodiment of this utility model, since the connecting wire is small in size and the target to be measured is often cargo, the sensing module can be placed inside the target to be measured. Through the gap in the cargo box, the connecting wire is electrically connected to the sensing module, thereby enabling detection inside the target to be measured, further improving detection flexibility and detection range, and thus enabling its widespread application in industrial production.

[0069] Figure 4 This diagram illustrates the detection of multiple targets using distributed passive sensing tags and sensors according to an embodiment of the present invention.

[0070] like Figure 4 As shown, when multiple targets need to be detected, the tag antenna 201 is placed outside the target 103, the tag circuit 202 is placed inside the connecting pipe 301, and the sensing module 102 is placed inside the target 103. The connecting line 303 is electrically connected to the sensing module 102 through the gap in the box of the target 103, thereby detecting multiple targets 103.

[0071] According to an embodiment of the present invention, the tag circuit includes a conversion module, a demodulation module, a processor, and a modulation module.

[0072] According to an embodiment of the present invention, the conversion module is electrically connected to the tag antenna and is used to convert electromagnetic wave signals into target electrical signals so as to use the target electrical signals to power the processor and the sensing module, so as to enable data transmission between the sensing module and the processor.

[0073] According to an embodiment of this utility model, the demodulation module is electrically connected to the conversion module and is used to demodulate the electromagnetic wave signal to obtain and send the baseband signal to the processor, so that the processor can send data acquisition instructions to the sensing module.

[0074] According to an embodiment of the present invention, the demodulation module is powered by the target electrical signal converted by the conversion module, the baseband signal is a digital signal, and the baseband signal may include control command information from the control terminal.

[0075] According to an embodiment of the present invention, the processor is electrically connected to the conversion module and the demodulation module, and is used to send a data acquisition command to the sensing module based on the baseband signal according to the wireless communication protocol and receive the target sampling data sent by the sensing module when the target electrical signal is normally powered to the processor.

[0076] According to an embodiment of the present invention, the processor includes a bus communication module, which includes a sensor module interface. The sensor module interface includes a power interface, a ground interface, and a data bus interface, so as to facilitate electrical connection between the sensor module and the sensor module interface. The processor supplies power to the sensor module and controls the sensor module to collect and transmit target sampling data.

[0077] According to an embodiment of the present invention, the connection line includes a power line, a ground line, and a data bus. The sensor module and the processor's sensor module interface are electrically connected through the power line, ground line, and data bus, thereby enabling interaction and transmission of target electrical signals between the sensor module and the processor. The data bus can be a single bus.

[0078] According to an embodiment of this utility model, after the electromagnetic wave signal is converted into a target electrical signal using the conversion module of the tag circuit, the target electrical signal simultaneously powers the processor and demodulation module. The demodulation module generates a baseband signal based on the electromagnetic wave signal and sends the baseband signal to the processor for control. While powering the processor with the target electrical signal, in response to the control of the baseband signal, the processor controls the reading and writing of the single bus to control the sensing module to collect target sampling data.

[0079] According to an embodiment of the present invention, the target sampling data may include first target sampling data and second target sampling data.

[0080] According to an embodiment of this utility model, when the processor performs a write operation via the control single bus, the processor first pulls the single bus of the sensing module low. After detecting the falling edge of the single bus, the sensing module begins sampling. When the processor writes a 0 to the sensing module, the processor controls the falling edge of the single bus to remain for a first predetermined period of time, and then pulls the single bus high, so that the sensing module enters a first sampling mode to sample the target under test and obtain first target sampling data. When the processor writes a 1 to the sensing module, the processor controls the falling edge of the single bus to remain for a second predetermined period of time, and then pulls the single bus high and maintains it for a third predetermined period of time, so that the sensing module enters a second sampling mode to sample the target under test and obtain second target sampling data.

[0081] According to an embodiment of the present invention, the first sampling mode may include modes such as reset, low power, initialization, and wait, but is not limited thereto; the second sampling mode may include modes such as normal and high power, but is not limited thereto.

[0082] According to an embodiment of the present invention, when the processor performs a read operation by controlling the single bus, the processor first pulls the single bus of the sensing module low. After the sensing module detects the falling edge of the single bus and holds it for a fourth predetermined period of time, the processor starts to determine whether the sensing module returns 1 or 0 based on the high or low state of the single bus. The processor samples within a second predetermined period of time. If the single bus is not pulled high within the second predetermined period of time, the processor reads 0. If the single bus is pulled high within the second predetermined period of time, the processor reads 1.

[0083] According to an embodiment of the present invention, the modulation module is electrically connected to the processor and the tag antenna, and is used to perform backscatter modulation on the target sampling data to obtain and send the target modulation data to the tag antenna, so that the tag antenna can send the target modulation data to the control terminal.

[0084] According to an embodiment of this utility model, the tag circuit includes a conversion module, a demodulation module, a processor, and a modulation module. The conversion module is electrically connected to the tag antenna, the demodulation module is electrically connected to the conversion module, the processor is electrically connected to both the conversion and demodulation modules, and the modulation module is electrically connected to both the processor and the tag antenna. The conversion module converts the electromagnetic wave signal into a target electrical signal, which then powers the demodulation module, processor, and sensing module. The demodulation module demodulates the electromagnetic wave signal to obtain a baseband signal, which is then sent to the processor. This causes the processor to send a data acquisition command to the sensing module. Based on a wireless communication protocol, the processor sends the data acquisition command to the sensing module according to the baseband signal and receives the target sampling data sent by the sensing module. The modulation module then performs backscatter modulation on the target sampling data to obtain target modulated data, which is then sent to the tag antenna so that the tag antenna can transmit the target modulated data to the control terminal. This system utilizes a tag circuit to convert electromagnetic wave signals into target electrical signals, which then power each module, enabling them to function normally. The sensor module collects data to obtain target sampling data of the target under test. This target sampling data can then be processed for monitoring purposes.

[0085] Figure 5 A schematic diagram of the processor write timing according to an embodiment of the present invention is shown.

[0086] like Figure 5As shown, the horizontal axis represents time, and the vertical axis represents the state of the single bus. VCC is 1, and GND is 0. From the write timing of the processor performing write operations by controlling the single bus, it can be seen that when the processor writes 0 to the sensor module, the processor controls the falling edge of the single bus to maintain a first predetermined time period T1+T2+T3, and then pulls the single bus high during the T3 time period, so that the sensor module enters the first sampling mode and samples the target under test. When the processor writes 1 to the sensor module, the processor controls the falling edge of the single bus to maintain a second predetermined time period T1, and then pulls the single bus high during the T1 time period, maintaining a third predetermined time period T2+T3, so that the sensor module enters the second sampling mode and samples the target under test.

[0087] Figure 6 A schematic diagram of the processor read timing according to an embodiment of the present invention is shown.

[0088] like Figure 6 As shown, the horizontal axis represents time, and the vertical axis represents the state of the single bus. VCC is 1 and GND is 0. The processor first pulls the single bus of the sensing module low. After the sensing module detects the falling edge of the single bus and holds it for a fourth predetermined period t0, the processor starts to determine whether the sensing module returns 1 or 0 based on the high or low state of the single bus. The processor samples within the second predetermined period T1. If the single bus is not pulled high within the second predetermined period T1, the processor reads 0. If the single bus is pulled high within the second predetermined period T1, the processor reads 1.

[0089] According to an embodiment of the present invention, the conversion module includes a matching submodule, a power divider submodule, a conversion submodule, and a voltage regulator submodule.

[0090] According to an embodiment of the present invention, the matching submodule is electrically connected to the tag antenna to enable impedance matching between the tag antenna and the power divider submodule, so as to transmit electromagnetic wave signals to the power divider submodule without power loss.

[0091] According to an embodiment of the present invention, the matching submodule enables the tag antenna and the power divider submodule to transmit power at maximum power.

[0092] According to an embodiment of the present invention, the power divider submodule is electrically connected to the matching submodule and is used to send electromagnetic wave signals to the conversion submodule and the demodulation module.

[0093] According to an embodiment of this utility model, the electromagnetic wave signal received by the power divider submodule is distributed proportionally to the conversion submodule and the demodulation module.

[0094] According to an embodiment of this utility model, the conversion submodule is electrically connected to the power divider submodule and is used to convert and process the electromagnetic wave signal emitted by the power divider submodule to obtain the initial electrical signal.

[0095] According to an embodiment of the present invention, the conversion submodule includes a rectifier unit and an energy harvesting and management unit.

[0096] According to an embodiment of this utility model, the rectifier unit is electrically connected to the power divider submodule and is used to convert the electromagnetic wave signal emitted by the power divider submodule into a DC signal.

[0097] According to an embodiment of the present invention, the energy harvesting and management unit is electrically connected to the rectifier unit and is used to boost the DC signal to obtain an initial electrical signal.

[0098] According to an embodiment of this utility model, the voltage regulator submodule is electrically connected to the conversion submodule and is used to regulate the voltage of the initial electrical signal to obtain the target electrical signal.

[0099] According to an embodiment of this utility model, the conversion module includes a matching submodule, a power divider submodule, a rectifier unit, an energy harvesting and management unit, and a voltage regulator submodule. The matching submodule is electrically connected to the tag antenna, the power divider submodule is electrically connected to the matching submodule, the rectifier unit is electrically connected to the power divider submodule, the energy harvesting and management unit is electrically connected to the rectifier unit, and the voltage regulator submodule is electrically connected to the conversion submodule. By utilizing the matching submodule, the power divider submodule, the rectifier unit, the energy harvesting and management unit, and the voltage regulator submodule to process and convert the electromagnetic wave signal step by step, the target electrical signal can be obtained.

[0100] According to an embodiment of the present invention, the demodulation module includes a detector submodule, a low-pass submodule, and a comparator submodule.

[0101] According to an embodiment of this utility model, the detector submodule is electrically connected to the power divider submodule and is used to filter the electromagnetic wave signal emitted by the power divider submodule to obtain an analog modulation signal.

[0102] According to an embodiment of the present invention, the low-pass submodule is electrically connected to the detector submodule and is used to filter out the DC offset in the analog modulation signal to obtain the target analog modulation signal.

[0103] According to an embodiment of the present invention, the comparator submodule is electrically connected to the low-pass submodule, the voltage regulator submodule, and the processor, and is used to perform analog-to-digital conversion processing on the target analog modulation signal to obtain a baseband signal when the voltage regulator submodule supplies power to the comparator submodule.

[0104] According to an embodiment of the present invention, the demodulation module includes a detector submodule, a low-pass submodule, and a comparator submodule. The detector submodule, the low-pass submodule, and the comparator submodule analyze the instruction information in the electromagnetic wave signal sent by the control terminal to obtain the baseband signal containing the instruction information. The baseband signal can then be used to send instructions to the processor so that the processor can control the sensing module to perform sampling.

[0105] According to an embodiment of the present invention, the tag circuit further includes an energy storage capacitor, which is electrically connected to the energy harvesting and management unit and is used to store an initial electrical signal so as to supply power to the processor, comparator submodule and sensing module.

[0106] According to an embodiment of this utility model, by setting an energy storage capacitor, the target electrical signal is converted and charged at the same time, so that when the power is insufficient, the energy storage capacitor can be used to temporarily supply power to the processor, comparator submodule and sensing module, thereby maintaining their normal operation and improving the stability and reliability of the distributed passive sensing tag.

[0107] Figure 7 A schematic diagram of a tag circuit and multiple sensors according to an embodiment of the present invention is shown.

[0108] like Figure 7 As shown, the tag circuit includes a matching submodule 701, a power divider submodule 702, a rectifier unit 703, an energy harvesting and management unit 704, a voltage regulator submodule 705, a detector submodule 706, a low-pass submodule 707, a comparator submodule 708, a processor 709, a modulation module 710, and an energy storage capacitor 711. The bus communication module 712 of the processor 709 includes a sensor module interface 713, which includes a power interface, a ground interface, and a data bus interface. The connection lines connecting to the sensor modules 102 include power lines, ground lines, and a data bus. Each sensor module and the sensor module 102 interface 713 of the processor 709 are electrically connected via the power lines, ground lines, and data bus. Based on a wireless communication protocol, this enables interaction and target electrical signal transmission between multiple sensor modules 102 and the processor 709.

[0109] According to embodiments of the present invention, the distributed passive sensing tag of the present invention can simultaneously power multiple sensing modules so that multiple sensing modules can perform detection at the same time, or it can power multiple sensing modules one by one so that multiple sensing modules can perform detection one by one.

[0110] Figure 8 A flowchart illustrating a method for collecting data from a target under test according to an embodiment of the present invention is shown.

[0111] like Figure 8As shown, the method for collecting data of the target under test in this embodiment includes operations S810~S850.

[0112] In operation of S810, the controller transmits electromagnetic wave signals to the tag antenna.

[0113] In operation of S820, the tag antenna transmits electromagnetic wave signals to the tag circuit.

[0114] In operation of S830, the tag circuit converts electromagnetic wave signals into target electrical signals, uses the target electrical signals to power the sensing module, and controls the sensing module to collect data from the target under test.

[0115] In operation S840, in response to the target sampling data collected by the sensing module received by the tag circuit, if the target sampling data meets the first preset condition, the target sampling data is backscattered and modulated to obtain target modulated data; if the target sampling data does not meet the first preset condition, an alarm message is generated.

[0116] According to an embodiment of the present invention, the first preset condition can be characterized as follows: when the target sampled data is less than or equal to a preset alarm threshold, the target sampled data can be directly backscattered and modulated to obtain target modulated data; when the target sampled data is greater than the preset alarm threshold, an alarm message is generated.

[0117] According to an embodiment of the present invention, after generating warning information, the sensing module or processor corresponding to the target sampling data that does not meet the first preset condition can sound an alarm, including issuing a warning sound, so as to prompt relevant personnel to conduct an inspection. It can also be sent to the controller, which can determine whether a warning needs to be issued.

[0118] In operation of S850, the tag circuit sends target modulation data or warning information to the controller.

[0119] According to an embodiment of this utility model, an electromagnetic wave signal is transmitted to the tag antenna via a controller. The tag antenna transmits the electromagnetic wave signal to the tag circuit, which converts the electromagnetic wave signal into a target electrical signal. This target electrical signal powers the sensing module and controls the sensing module to collect data from the target under test. In response to the target sampling data received by the tag circuit from the sensing module, if the target sampling data meets a first preset condition, backscatter modulation is applied to the target sampling data to obtain target modulated data. If the target sampling data does not meet the first preset condition, an alarm message is generated, and the tag circuit sends the target modulated data or the alarm message to the controller. This enables simultaneous measurement of multiple targets or multiple locations of targets under test using a single distributed passive sensing tag when detection of the target is required. This improves measurement efficiency and quality, reduces measurement costs, facilitates long-term detection of the target under test, and enhances the stability and reliability of the tag.

[0120] Figure 9 A schematic diagram illustrating the workflow of a distributed passive sensing tag according to an embodiment of the present invention is shown.

[0121] like Figure 9 As shown, firstly, multiple tag antennas of multiple distributed passive sensor tags collect electromagnetic wave signals 901 emitted by the reader / collector, thereby providing self-power to the tag circuit and multiple sensor modules. Then, they wait for commands from the reader / collector 902. If an identification command from a distributed passive sensor tag is received, the ID data of the distributed passive sensor tag is reflected 903. Then, they wait for data acquisition commands 904. If any distributed passive sensor tag receives an acquisition command with a matching ID, it is determined whether the ID data of the distributed passive sensor tag matches the ID data in the data acquisition command 905. If they match, the sensor module data is read in a polling manner, and the target modulation data is reflected to the reader / collector 906. A polling instruction for the number of sensor module data collected is sent to the processor 907. It is determined whether the number of sensor data collected is greater than the predetermined number of sensor modules 908. If the number of sensor data collected is greater than the predetermined number of sensor modules, a polling end message 909 is reflected back to the reader / collector.

[0122] Figure 10 A schematic diagram illustrating the entire process of collecting data from the target under test according to an embodiment of the present invention is shown.

[0123] like Figure 10As shown, the reader / collector first identifies the surrounding distributed passive sensor tags 1001, then selects a distributed passive sensor tag 1002 based on the ID of the identified distributed passive sensor tag, sends a data acquisition command to the distributed passive sensor tag to poll the sensor module 1003, the reader / collector receives the target modulation data reflected by the distributed passive sensor tag 1004, the reader / collector sends the target modulation data to the upper layer application or determines whether a data alarm is needed 1005, determines whether the number of sensor modules collected is greater than the predetermined number of sensor modules 1006, if the number of sensor data collected is greater than the predetermined number of sensor modules, determines whether it is necessary to obtain the sampling data of the sensor modules of the remaining distributed passive sensor tags 1007, if not, the process ends 1008.

[0124] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this utility model. In particular, the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways without departing from the spirit and teachings of this utility model. All such combinations and / or combinations fall within the scope of this utility model.

Claims

1. A distributed passive sensing tag, characterized in that, include: Tag antenna, tag circuit, and distributed connectivity module; The tag antenna is disposed outside the target under test and is used to receive electromagnetic wave signals emitted by the controller and send target sampling data collected by the sensing module to the controller. The tag circuit is electrically connected to the tag antenna and is used to convert the electromagnetic wave signal into a target electrical signal. The target electrical signal is then used to power the sensing module so that the sensing module can operate normally. The sensing module is located at a predetermined position corresponding to the target under test and is used to collect data from the target under test to obtain the target sampling data. The distributed connection module is electrically connected to the tag circuit and is used to electrically connect the tag circuit and the sensing module so as to supply power to the sensing module and enable data transmission between the tag circuit and the sensing module; The tag antenna, the tag circuit, and the distributed connection module are all movable relative to the sensing module in any direction.

2. The label according to claim 1, characterized in that, The distributed connection module includes connection pipes, interfaces, and connection lines; The connecting pipe is located below the tag antenna and is used to store and protect the tag circuit and the connecting wire; The interface is disposed on the outer wall of the connecting pipe and is used to electrically connect the connecting line inside the connecting pipe to the sensing module through the interface. The connecting line is used to electrically connect the tag circuit and the sensing module so that the voltage signal can supply power to the sensing module through the connecting line and maintain data transmission between the tag circuit and the sensing module.

3. The label according to claim 2, characterized in that, The connecting pipe is a retractable plastic pipe.

4. The label according to claim 1, characterized in that, The tag circuit includes a conversion module, a demodulation module, a processor, and a modulation module; The conversion module is electrically connected to the tag antenna and is used to convert the electromagnetic wave signal into a target electrical signal so as to use the target electrical signal to power the processor and the sensing module, so as to enable data transmission between the sensing module and the processor. The demodulation module is electrically connected to the conversion module and is used to demodulate the electromagnetic wave signal to obtain and send a baseband signal to the processor, so that the processor can send a data acquisition command to the sensing module. The processor is electrically connected to the conversion module and the demodulation module, and is used to send a data acquisition command to the sensing module based on the baseband signal according to the wireless communication protocol and in response to the normal power supply of the target electrical signal to the processor, and to receive the target sampling data sent by the sensing module. The modulation module is electrically connected to the processor and the tag antenna, and is used to perform backscatter modulation on the target sampling data to obtain and send target modulation data to the tag antenna, so that the tag antenna can send the target modulation data to the control terminal.

5. The label according to claim 4, characterized in that, The conversion module includes a power divider submodule, a conversion submodule, and a voltage regulator submodule; The power divider submodule is used to send the electromagnetic wave signal to the conversion submodule and the demodulation module; The conversion submodule is electrically connected to the power divider submodule and is used to convert the electromagnetic wave signal emitted by the power divider submodule to obtain an initial electrical signal. The voltage regulation submodule is electrically connected to the conversion submodule and is used to regulate the voltage of the initial electrical signal to obtain the target electrical signal.

6. The label according to claim 5, characterized in that, The conversion module further includes a matching submodule, which is electrically connected to the tag antenna and the power divider submodule to enable impedance matching between the tag antenna and the power divider submodule, so as to transmit the electromagnetic wave signal to the power divider submodule without power loss.

7. The label according to claim 5, characterized in that, The conversion submodule includes: a rectifier unit and an energy harvesting and management unit; The rectifier unit is electrically connected to the power divider submodule and is used to convert the electromagnetic wave signal emitted by the power divider submodule into a DC signal. The energy harvesting and management unit is electrically connected to the rectifier unit and is used to boost the DC signal to obtain the initial electrical signal.

8. The label according to claim 4, characterized in that, The demodulation module includes a detector submodule, a low-pass submodule, and a comparator submodule; The detector submodule is electrically connected to the power divider submodule and is used to filter the electromagnetic wave signal emitted by the power divider submodule to obtain an analog modulated signal. The low-pass submodule is electrically connected to the detector submodule and is used to filter out the DC offset in the analog modulation signal to obtain the target analog modulation signal. The comparator submodule is electrically connected to the low-pass submodule, the voltage regulator submodule, and the processor. It is used to perform analog-to-digital conversion on the target analog modulation signal to obtain the baseband signal when the voltage regulator submodule supplies power to the comparator submodule.

9. The label according to claim 4, characterized in that, The processor includes a bus communication module, which includes a sensor module interface. The sensor module interface includes a power interface, a ground interface, and a data bus interface, so as to facilitate electrical connection between the sensor module and the sensor module interface. The processor supplies power to the sensor module and controls the sensor module to collect and transmit target sampling data.

10. The label according to claim 4, characterized in that, The tag circuit also includes an energy storage capacitor, which is electrically connected to the energy harvesting and management unit and is used to store an initial electrical signal so as to supply power to the processor, comparator submodule and the sensing module.

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