Signal receiving method, controller, storage medium and signal receiving equipment

Abstract

The invention provides a signal receiving method, a controller, a storage medium and signal receiving equipment, and relates to the technical field of data transmission. The signal receiving method disclosed by the invention comprises the following steps: determining impedance information of a source end sensor of to-be-received sensor data; determining an associated target receiving end impedance mode according to the impedance information; and switching the signal receiving end to a target receiving end impedance mode, and receiving sensor data.

Description

Technical Field

[0001] The present disclosure relates to the technical field of data transmission, and in particular to a signal receiving method, a controller, a storage medium and a signal receiving device. Background Art

[0002] In modern building automation systems, multiple sensors are often required to perform multi-position and multi-dimensional detection, and then transmit the detected data to the controller for further processing.

[0003] As the hub of signal processing, the network controller needs to receive analog signals from different manufacturers and different types of equipment. The transmission quality of analog signals is crucial to the stability and reliability of the system. Summary of the invention

[0004] One object of the present disclosure is to improve the signal reception quality of multiple sensors at a receiving end.

[0005] According to one aspect of some embodiments of the present disclosure, a signal receiving method is proposed, including: determining impedance information of a source sensor of sensor data to be received; determining an associated target receiving end impedance mode based on the impedance information; switching the signal receiving end to the target receiving end impedance mode, and receiving the sensor data.

[0006] Based on the method in the embodiment shown above, the impedance mode of the receiving end can be adjusted according to the impedance information of the sensor at the sensor data sending end, so that the impedance of the receiving end matches the impedance of the sending end, avoiding signal reflection, attenuation, and distortion caused by excessive impedance difference, and improving the signal reception quality of the receiving end for sensors with different impedance conditions.

[0007] In some embodiments, the signal receiving method further includes: acquiring impedance information of each sensor; determining a receiving end impedance pattern matched by each sensor according to the impedance information of each sensor; and associating each sensor with the matching receiving end impedance pattern.

[0008] Based on the method in the embodiment shown above, the impedance information of the sensor can be determined in advance, and a matching receiving end impedance mode can be associated with it, so that the target receiving end impedance mode can be determined by using the associated information in subsequent use, thereby improving switching efficiency.

[0009] In some embodiments, obtaining the impedance information of each sensor includes: determining each sensor that will send a detection signal to a signal receiving end, measuring and storing the impedance information of each sensor.

[0010] Based on the method in the embodiment shown above, the impedance of each sensor can be measured, so that the sensor impedance in the case of multiple manufacturers and multiple models of sensors can be accurately obtained, thereby increasing the scope of application and facilitating field deployment and use.

[0011] In some embodiments, obtaining the impedance information of each sensor includes: determining each sensor that will send a detection signal to a signal receiving end, querying configuration information of each sensor, obtaining impedance information, and storing it.

[0012] Based on the method in the embodiment shown above, it is possible to fully utilize the pre-configuration information of the sensor, reduce the measurement burden, and improve the efficiency of deployment and system expansion.

[0013] In some embodiments, switching the signal receiving end to the target receiving end impedance mode includes: determining a target receiving end impedance circuit corresponding to the target receiving end impedance mode; and switching the signal receiving end to conduct the target receiving end impedance circuit.

[0014] Based on the method in the embodiment shown above, the impedance mode can be switched by providing and switching the impedance circuit. The circuit switching process is easy to implement, so that the receiving end has a stable and reliable receiving impedance, thereby improving the reliability of the switching.

[0015] In some embodiments, switching the signal receiving end to the target receiving end impedance mode further includes: determining adjustment parameters of elements of the target receiving end impedance circuit corresponding to the target receiving end impedance mode; and adjusting the elements in the target receiving end impedance circuit to the adjustment parameters.

[0016] Based on the method in the embodiment shown above, it is possible to achieve more detailed adjustment of the receiving end circuit impedance by adjusting the parameters of the element on the basis of switching the impedance circuit, increase the number of receiving end impedance modes that can be provided, and avoid increasing the complexity of the receiving end circuit.

[0017] In some embodiments, determining the target receiving end impedance circuit corresponding to the target receiving end impedance mode includes: determining the target receiving end impedance mode corresponding to a first impedance circuit as the target receiving end impedance circuit, wherein in the first impedance circuit, the positive input terminal of the first operational amplifier is connected to the signal input terminal of the sensor data via a first resistor, the non-positive input terminal of the first operational amplifier is grounded, and a feedback resistor is included between the positive input terminal and the output terminal of the first operational amplifier.

[0018] Based on the method in the embodiment shown above, the high gain characteristics and negative feedback mechanism of the operational amplifier are utilized so that the positive input terminal of the operational amplifier has a high input impedance, so that the high output impedance of the sensor at the signal source end can be well matched with the circuit, thereby achieving stable signal transmission.

[0019] In some embodiments, determining the target receiving end impedance circuit corresponding to the target receiving end impedance mode includes: determining the target receiving end impedance mode corresponding to a second impedance circuit as the target receiving end impedance circuit, wherein in the second impedance circuit, the non-positive input terminal of the second operational amplifier is connected to the signal input terminal of the sensor data via a second resistor, the positive input terminal of the second operational amplifier is grounded, and a feedback resistor is included between the non-positive input terminal and the output terminal of the second operational amplifier.

[0020] Based on the method in the embodiment shown above, the low reverse input impedance of the operational amplifier is utilized so that the low output impedance of the sensor at the signal source end can be well matched with the circuit, thereby achieving stable signal transmission.

[0021] In some embodiments, the signal receiving method further includes: determining a target resistance value of a second resistor in a second impedance circuit corresponding to the target receiving end impedance mode; and adjusting the second resistor to the target resistance value.

[0022] Based on the method in the embodiment shown above, the impedance can be further refined and adjusted under low impedance conditions, thereby improving the impedance matching between the transmitting and receiving ends and further improving the signal transmission quality.

[0023] In some embodiments, the signal receiving end includes a first impedance circuit and a second impedance circuit, and the target receiving end impedance circuit is turned on by switching the operational amplifier turned on in the receiving end impedance circuit.

[0024] Based on the method in the embodiment shown above, a receiving end impedance circuit based on an operational amplifier and capable of providing high impedance and low impedance is provided, which reduces the difficulty of switching the receiving end impedance mode and improves the switching efficiency.

[0025] In some embodiments, switching the operational amplifier turned on in the receiving end impedance circuit includes: determining a control level output to the control end of the operational amplifier, wherein, in the second impedance circuit, the non-positive input end of the second operational amplifier is connected to the signal input end of the sensor data via a second resistor, the positive input end of the second operational amplifier is grounded, and a feedback resistor is included between the non-positive input end and the output end of the second operational amplifier.

[0026] Based on the method in the embodiment shown above, a connection method of an operational amplifier in a working state is provided by controlling the control level, and the selective conduction of two impedance circuits is realized through a logic circuit, thereby reducing the complexity and cost of the circuit.

[0027] According to one aspect of some embodiments of the present disclosure, a controller is proposed, comprising: an impedance information determination unit, configured to determine the impedance information of a source sensor of sensor data to be received; a mode determination unit, configured to determine an associated target receiving end impedance mode based on the impedance information; and a switching control unit, configured to control a signal receiving end to switch to the target receiving end impedance mode.

[0028] Based on the controller in the embodiment shown above, the impedance mode of the receiving end can be adjusted according to the impedance information of the sensor at the sensor data sending end, so that the impedance of the receiving end matches the impedance of the sending end, avoiding signal reflection, attenuation, and distortion caused by excessive impedance difference, and improving the signal reception quality of the receiving end from sensors with different impedance conditions.

[0029] In some embodiments, the controller also includes: an impedance information acquisition unit, configured to acquire the impedance information of each sensor; an association information determination unit, configured to determine the receiving end impedance pattern matched by each sensor based on the impedance information of each sensor, and associate each sensor with the matching receiving end impedance pattern.

[0030] Based on the controller in the embodiment shown above, the impedance information of the sensor can be determined in advance, and a matching receiving end impedance mode can be associated with it, so that the target receiving end impedance mode can be determined by using the associated information in subsequent use, thereby improving switching efficiency.

[0031] According to one aspect of some embodiments of the present disclosure, a controller is provided, comprising: a memory; and a processor coupled to the memory, wherein the processor is configured to execute any one of the above signal receiving methods based on instructions stored in the memory.

[0032] Based on the controller in the embodiment shown above, the impedance mode of the receiving end can be adjusted according to the impedance information of the sensor at the sensor data sending end, so that the impedance of the receiving end matches the impedance of the sending end, avoiding signal reflection, attenuation, and distortion caused by excessive impedance difference, and improving the signal reception quality of the receiving end from sensors with different impedance conditions.

[0033] According to one aspect of some embodiments of the present disclosure, a computer-readable storage medium is provided, on which computer instructions are stored, and when the instructions are executed by a processor, any one of the signal receiving methods described above is implemented.

[0034] By running the instructions stored in the computer-readable storage medium in the embodiment, the impedance mode of the receiving end can be adjusted according to the impedance information of the sensor at the sensor data sending end, so that the impedance of the receiving end matches the impedance of the sending end, avoiding the problems of signal reflection, attenuation and distortion caused by excessive impedance difference, and improving the signal reception quality of the receiving end from sensors with different impedance conditions.

[0035] According to one aspect of some embodiments of the present disclosure, a computer program product is provided, including a computer program or instructions, and when the computer program or instructions are executed by a processor, any one of the signal receiving methods described above is implemented.

[0036] By running the instructions of the computer program product in the embodiment, the impedance mode of the receiving end can be adjusted according to the impedance information of the sensor at the sensor data sending end, so that the impedance of the receiving end matches the impedance of the sending end, avoiding the problems of signal reflection, attenuation and distortion caused by excessive impedance difference, and improving the signal reception quality of the receiving end from sensors with different impedance conditions.

[0037] According to one aspect of some embodiments of the present disclosure, a signal receiving device is proposed, comprising: a control signal receiving port configured to receive a control signal output by a controller; and an impedance circuit configured to adjust an impedance mode for receiving sensor data according to the control signal and receive the sensor data.

[0038] Based on the signal receiving device in the embodiment shown above, it is possible to switch the impedance mode that matches the sensor data sending end under the control of the controller, thereby avoiding the problems of signal reflection, attenuation, and distortion caused by excessive impedance differences during the signal receiving process, and improving the signal reception quality of the receiving end for sensors with different impedance conditions.

[0039] In some embodiments, the impedance circuit includes at least one of the following: a first impedance circuit, configured to receive sensor data when turned on by a control signal, wherein in the first impedance circuit, the positive input terminal of the first operational amplifier is connected to the signal input terminal of the sensor data via a first resistor, the non-positive input terminal of the first operational amplifier is grounded, and a feedback resistor is included between the positive input terminal and the output terminal of the first operational amplifier; or a second impedance circuit, configured to receive sensor data when turned on by a control signal, wherein in the second impedance circuit, the non-positive input terminal of the second operational amplifier is connected to the signal input terminal of the sensor data via a second resistor, the positive input terminal of the second operational amplifier is grounded, and a feedback resistor is included between the non-positive input terminal and the output terminal of the second operational amplifier.

[0040] Based on the signal receiving device in the embodiment shown above, the high gain characteristics and negative feedback mechanism of the operational amplifier are utilized, so that the positive input terminal of the operational amplifier has a high input impedance, so that the high output impedance of the sensor at the signal source end can be well matched with the circuit, thereby realizing stable signal transmission; the low reverse input impedance of the operational amplifier is utilized, so that the low output impedance of the sensor at the signal source end can be well matched with the circuit, thereby realizing stable signal transmission.

[0041] In some embodiments, the second resistor is a variable circuit, and the second resistor is configured to adjust resistance under the control of a control signal.

[0042] Based on the signal receiving device in the embodiment shown above, the impedance can be further refined and adjusted under low impedance conditions, thereby improving the impedance matching between the transmitting and receiving ends and further improving the signal transmission quality.

[0043] In some embodiments, the impedance circuit includes a first impedance circuit, a second impedance circuit and an inverter, the control end of the first operational amplifier circuit and the second operational amplifier circuit are connected to the control signal receiving port, and the inverter is located between the control end of the first operational amplifier circuit or the second operational amplifier circuit and the control signal receiving port.

[0044] Based on the signal receiving device in the embodiment shown above, a connection method of an operational amplifier in a working state is provided by controlling the control level, and the selective conduction of two impedance circuits is realized through a logic circuit, thereby reducing the complexity and cost of the circuit.

[0045] In some embodiments, the impedance circuit includes a first impedance circuit and a second impedance circuit, and the first impedance circuit and the second impedance circuit share a same feedback resistor.

[0046] Based on the signal receiving device in the embodiment shown above, it is possible to reduce the number of components required in the impedance circuit, thereby reducing the cost and complexity of the circuit.

[0047] In some embodiments, the signal receiving device further includes: a measurement circuit configured to detect impedance information of the sensor and send the impedance information to the controller.

[0048] Based on the signal receiving device in the embodiment shown above, the impedance of each sensor can be measured, so that the sensor impedance in the case of multiple manufacturers and multiple models of sensors can be accurately obtained, thereby increasing the scope of application and facilitating field deployment and use.

[0049] In some embodiments, the controller is any one of the controllers mentioned above.

[0050] Based on the signal receiving device in the embodiment shown above, the impedance mode of the receiving end can be adjusted according to the impedance information of the sensor at the sensor data sending end, so that the impedance of the receiving end matches the impedance of the sending end, thereby improving the reliability and accuracy of impedance mode switching.

[0051] According to one aspect of some embodiments of the present disclosure, a signal receiving system is proposed, comprising: any one of the signal receiving devices described above and any one of the controllers described above.

[0052] Based on the system in the embodiment shown above, the impedance mode of the receiving end can be adjusted according to the impedance information of the sensor at the sensor data sending end, so that the impedance of the receiving end matches the impedance of the sending end, avoiding signal reflection, attenuation, and distortion caused by excessive impedance difference, and improving the signal reception quality of the receiving end from sensors with different impedance conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0054] Figure 1 The present invention provides a flowchart of some embodiments of the signal receiving method of the present invention.

[0055] Figure 2 Schematic diagrams of some embodiments of impedance circuits in the signal receiving method disclosed in the present invention.

[0056] Figure 3 Flow charts of other embodiments of the signal receiving method disclosed in the present invention.

[0057] Figure 4 Schematic diagram of some embodiments of the measurement circuit in the signal receiving method of the present disclosure.

[0058] Figure 5 Schematic diagrams of some embodiments of the controller of the present disclosure.

[0059] Figure 6 Schematic diagrams of other embodiments of the controller disclosed herein.

[0060] Figure 7 Schematic diagrams of some further embodiments of the controller disclosed herein.

[0061] Figure 8 Schematic diagram of some embodiments of the signal receiving device disclosed in the present invention.

[0062] Fig. 9 Schematic diagram of some embodiments of the signal receiving system of the present disclosure. DETAILED DESCRIPTION

[0063] The technical solution of the present disclosure is further described in detail below through the accompanying drawings and embodiments.

[0064] Impedance mismatch between the signal source and the receiving end can cause signal reflection, attenuation and distortion, seriously affecting the integrity of the signal and the performance of the system. For example, the signal transmission between the temperature sensor and the controller may cause signal distortion due to impedance mismatch, affecting the accuracy of temperature control. Although the passive matching network in the related art can achieve a certain degree of impedance matching, its effect is limited in the case of dynamically changing signal source impedance.

[0065] Taking building control systems as an example, different types of equipment are widely used in intelligent management of buildings. Impedance mismatch can cause a variety of problems in electronic equipment and communication systems, including signal reflection and distortion, power loss, voltage and current fluctuations, signal attenuation, system instability, increased noise, and even equipment damage. The above problems will not only reduce the performance and reliability of the system, but may also cause damage to sensitive electronic devices.

[0066] Due to the particularity of analog signals, when a low impedance source is connected to a high impedance load, signal reflection will be reduced, but the signal strength at the load end will be higher, which may cause overload or damage to the load. In addition, the signal attenuation under this configuration is small, but the noise level may increase because the high impedance load is more susceptible to external interference. When a high impedance source is connected to a low impedance load, the signal reflection will be serious, resulting in signal distortion, especially for high-speed and high-frequency signals. The signal attenuation under this configuration is large, and the signal strength at the load end will be weakened, affecting the transmission quality and reliability of the signal. In addition, the output power of the high impedance source cannot be effectively transmitted to the low impedance load, resulting in power loss. Impedance mismatch of analog signals can cause signal reflection and distortion, increase noise and signal attenuation, which seriously affects the quality of the signal and the stability of the system. These problems will not only reduce the performance of the system, but also may cause damage to sensitive electronic devices, especially in high-precision and high-speed analog signal systems, the impact of impedance mismatch is particularly significant. Signal reflection and distortion will destroy the integrity of the signal, increased noise will reduce the signal-to-noise ratio, and signal attenuation will weaken the signal strength, all of which will seriously affect the reliability and transmission effect of the system.

[0067] In response to the above problems, the present disclosure proposes a signal receiving method, a controller, a storage medium and a signal receiving device, which switches the impedance mode of the receiving end by determining the impedance condition of the transmitting end, realizes dynamic adjustment of the load impedance of the receiving end, achieves efficient signal transmission, improves the signal reception quality of the receiving end for multiple sensors, and is beneficial to the stable operation of the system in which the sensors and their receiving ends are deployed.

[0068] The flowcharts of some embodiments of the signal receiving method disclosed in the present invention are as follows: Figure 1 The method may be executed by a controller at the receiving end (eg, a main controller of the sensor system).

[0069] In step S14, impedance information of the source sensor of the sensor data to be received is determined.

[0070] In some embodiments, the source sensor of the sensor data to be currently received can be determined based on pre-configured time, cycle and other information, thereby facilitating the planned acquisition of data from multiple sensors at the receiving end. The time-division multiplexing capability can be used to reduce the demand for the number and capacity of signal receiving ports at the receiving end, thereby achieving regular collection of data from multiple sensors.

[0071] In some embodiments, the receiving end may first obtain or generate a data acquisition demand, and then determine the source sensor corresponding to the data to be acquired, thereby realizing demand-based sensor data collection, improving the timeliness of meeting the demand, and also improving the timeliness of the obtained sensor data.

[0072] In some embodiments, the impedance information of the sensor may be pre-stored in a controller or a network controller at the receiving end. The impedance information of the source end sensor may be determined by reading the pre-stored information, thereby improving the efficiency of information determination and facilitating the timeliness of subsequent steps.

[0073] In step S16, the associated target receiving end impedance mode is determined according to the impedance information.

[0074] In some embodiments, the correspondence between the impedance information and the impedance mode of the receiving end is pre-stored, for example, in a controller or a network controller of the receiving end, and the impedance mode of the receiving end is obtained by information matching. Such a method can improve the efficiency of determining the impedance mode of the receiving end.

[0075] In step S18, the signal receiving end is switched to the target receiving end impedance mode, and the sensor data is received.

[0076] In some embodiments, the signal receiving end may be pre-deployed with an impedance circuit that can provide multiple impedance modes, and the impedance of the impedance circuit is the input impedance of the receiving end, so that after determining the impedance mode of the target receiving end, the corresponding target receiving end impedance circuit is determined, and the signal receiving end is switched to turn on the target receiving end impedance circuit. Based on the method in the embodiment shown above, the impedance mode can be switched by providing and switching the impedance circuit, and the circuit switching process is easy to implement, so that the receiving end has a stable and reliable receiving impedance, which improves the reliability of the switching.

[0077] In some embodiments, the impedance circuit of the receiving end may have an element with adjustable parameters, and the input impedance of the receiving end may be adjusted by adjusting the parameters of the element, thereby achieving more detailed adjustment of the input impedance of the receiving end, further improving the transmission of sensor data and the impedance matching of the receiving end, and further improving the signal transmission quality.

[0078] In some embodiments, the signal receiving end can further determine the adjustment parameters of the components of the target receiving end impedance circuit corresponding to the target receiving end impedance mode based on the impedance mode of the switching impedance circuit, and adjust the components in the target receiving end impedance circuit to the adjustment parameters.

[0079] Based on the method in the embodiment shown above, it is possible to achieve more detailed adjustment of the impedance of the receiving end circuit by adjusting the parameters of the elements on the basis of the switching impedance circuit, thereby reducing the number and complexity of circuit elements that need to be adjusted to achieve impedance matching. While achieving substantial adjustment to achieve approximate impedance matching, the number of receiving end impedance modes that can be provided is increased, thereby avoiding increasing the complexity of the receiving end circuit and improving the adjustment efficiency.

[0080] Based on the method in the embodiment shown above, the impedance mode of the receiving end can be adjusted according to the impedance information of the sensor at the sensor data sending end, so that the impedance of the receiving end matches the impedance of the sending end, avoiding signal reflection, attenuation, and distortion caused by excessive impedance difference, and improving the signal reception quality of the receiving end for sensors with different impedance conditions.

[0081] Schematic diagrams of some embodiments of the impedance circuit in the signal receiving method of the present disclosure are as follows Figure 2 The impedance circuit in this embodiment is an example of a feasible implementation. Based on the inventive concept of the present disclosure, the impedance circuit is not limited to the following. Figure 2 In the form shown, this embodiment should not be construed to unduly limit the disclosure.

[0082] In some embodiments, the impedance circuit may be Figure 2 The first impedance circuit shown in 201. In the first impedance circuit, the positive input terminal of the first operational amplifier is connected to the signal input terminal (signal source IN port) of the sensor data through the first resistor R1, the non-positive input terminal of the first operational amplifier is grounded, and a feedback resistor R is included between the positive input terminal and the output terminal of the first operational amplifier. F The resistance value of R1 can range from 0 to 5000Ω. FThe resistance value range is between 10KΩ and 100KΩ, so as to facilitate the adjustment of the amplification factor. When the target receiving end impedance mode determined in the above step S16 is a mode associated with the first impedance circuit, the first impedance circuit is switched to be turned on in the above step S18, and the sensor data is received by using the signal source IN port of the first impedance circuit. In the first impedance circuit, the signal input end of the sensor data is connected to the positive input end of the first operational amplifier through the first resistor R1. The high gain characteristics and negative feedback mechanism of the operational amplifier make the positive input end of the operational amplifier have a high input impedance. Therefore, when the impedance information of the source end sensor determined in the above step S14 is high impedance, for example, the source end sensor is a capacitive sensor for measuring liquid level information, the target receiving end impedance mode determined in step S16 is to use the first impedance circuit, so that the high output impedance of the signal source end sensor can be well matched with the circuit, avoiding the signal attenuation caused by the low impedance of the receiving end and the reduction of the transmission distance, and realizing the stable transmission of the signal.

[0083] In some embodiments, the impedance circuit may be Figure 2 The second impedance circuit shown in 202. In the second impedance circuit, the non-positive input terminal of the second operational amplifier is connected to the signal input terminal (signal source IN port) of the sensor data via the second resistor R2, the positive input terminal of the second operational amplifier is grounded, and a feedback resistor R is included between the non-positive input terminal and the output terminal of the second operational amplifier. F The resistance of R2 is between 50 and 5000Ω, and the feedback resistor R F The resistance value range is between 10KΩ and 100KΩ, so as to facilitate the adjustment of the amplification factor. When the target receiving end impedance mode determined in the above step S16 is a mode associated with the second impedance circuit, the second impedance circuit is switched to be turned on in the above step S18, and the sensor data is received by using the signal source IN port of the second impedance circuit. In the second impedance circuit, the signal input end of the sensor data is connected to the non-positive input end of the second operational amplifier through the second resistor R2, and the low reverse input impedance of the operational amplifier is utilized, so that the receiving end has a low input impedance. Therefore, when the impedance information of the source end sensor determined in the above step S14 is low impedance, such as a sensor with low input impedance such as a thermocouple, the target receiving end impedance mode determined in step S16 is to use the second impedance circuit, so that the low output impedance of the signal source end sensor can be well matched with the circuit, avoiding signal distortion caused by excessively high impedance at the receiving end, resulting in slow transmission, increased power consumption and other problems, and realizing stable signal transmission.

[0084] In some embodiments, Figure 2As shown in the second impedance circuit 202 , the second resistor R2 is a variable resistor. When the target receiving end impedance mode is determined in the above step S16 , the target resistance value of the second resistor can also be determined, and then the second resistor is adjusted to the target resistance value.

[0085] Based on the method in the embodiment shown above, the impedance can be further finely adjusted in the case of low impedance, the impedance matching degree of the sending and receiving ends is improved, and the signal transmission quality is further improved. In addition, the first resistor R1 is set as a fixed resistor in the first impedance circuit 201. Since the input impedance provided by the first impedance circuit 201 is high, subtle adjustments are unlikely to cause an impact, thereby avoiding unnecessary burdens on the control and adjustment of the receiving end.

[0086] In some embodiments, the impedance circuit at the receiving end is as follows Figure 2 As shown in , it includes a first impedance circuit and a second impedance circuit, wherein the control signal is connected to the operational amplifier that is turned on in the impedance circuit after being processed to control the on and off of each part in the impedance circuit.

[0087] Based on the method in the embodiment shown above, a receiving end impedance circuit based on an operational amplifier and capable of providing high impedance and low impedance is provided, which reduces the difficulty of switching the receiving end impedance mode and improves the switching efficiency.

[0088] In some embodiments, switching the operational amplifier turned on in the receiving end impedance circuit includes: determining a control level output to the control end of the operational amplifier, wherein in the second impedance circuit, the non-positive input end of the second operational amplifier is connected to the signal input end of the sensor data via a second resistor, the positive input end of the second operational amplifier is grounded, and a feedback resistor is included between the non-positive input end and the output end of the second operational amplifier. For example, a gate circuit (such as an XOR gate circuit) uses VCC as a power supply, performs logical processing on the control signal and VCC, and outputs a high level or a low level. One of the control ends of the first operational amplifier and the second operational amplifier is directly connected to the output end of the gate circuit, and the other is connected to the output end of the gate circuit after an inverter. When the gate circuit outputs a high level, one of the first and second operational amplifiers is turned on, and when the gate circuit outputs a low level, the other of the first and second operational amplifiers is turned on. Figure 2 As shown in , the inverter is located between the control end of the second operational amplifier and the output end of the gate circuit. When the gate circuit outputs a high level, the first operational amplifier is turned on, the second operational amplifier does not work, and the first impedance circuit is used to receive the sensor data; when the gate circuit outputs a low level, the first operational amplifier does not work, the second operational amplifier is turned on, and the second impedance circuit is used to receive the sensor data.

[0089] Based on the method in the embodiment shown above, a connection method of an operational amplifier in a working state is provided by controlling the control level, and the selective conduction of two impedance circuits is realized through a logic circuit, thereby reducing the complexity and cost of the circuit.

[0090] In some embodiments, before the above step S14, the following steps may also be performed: Figure 3 The operations in steps S31-S33 described in .

[0091] In step S31, the impedance information of each sensor is obtained. The impedance information can be stored in the controller of the receiving end or the cloud controller for subsequent use.

[0092] In some embodiments, after determining that the detection signal will be sent to each sensor at the signal receiving end, the impedance information of each sensor can be measured and stored. When a sensor needs to be added, the impedance of the newly added sensor is also measured and stored. In addition, the association information between the model and impedance information of each sensor can also be stored. When the impedance information of the sensor of the same model is needed later, the existing association information can be queried, which is conducive to reducing the measurement workload and improving deployment efficiency.

[0093] Based on the method in the embodiment shown above, the impedance of each sensor can be measured, so that the sensor impedance in the case of multiple manufacturers and multiple models of sensors can be accurately obtained, thereby increasing the scope of application and facilitating field deployment and use.

[0094] In some embodiments, after determining that each sensor at the signal receiving end will send a detection signal, the configuration information of each sensor can be queried through the manufacturer's manual or pre-stored information to obtain and store the impedance information. Based on the method in the embodiment shown above, the pre-configuration information of the sensor can be fully utilized to reduce the measurement burden and improve the efficiency of deployment and system expansion. In addition, when the impedance information of the sensor cannot be obtained based on the pre-configured information, the impedance information of the sensor can also be measured to improve the completeness of the information and improve the reliability of the operation of the receiving end.

[0095] In step S32, the receiving end impedance mode matched by each sensor is determined according to the impedance information of each sensor. In some embodiments, the receiving end controller or the cloud controller may store rules for determining the receiving end impedance mode matched by the impedance information, for example, by comparing with a threshold value, and according to the interval range in which the impedance information falls, the receiving end impedance mode corresponding to the interval range is used as the receiving end impedance mode corresponding to the impedance information, that is, the receiving end impedance mode corresponding to the sensor.

[0096] In step S33, each sensor is associated with a matching receiving end impedance pattern. The association information can be stored in the receiving end controller or the cloud controller for timely retrieval and use.

[0097] Based on the method in the embodiment shown above, the impedance information of the sensor can be determined in advance, and a matching receiving end impedance mode can be associated with it, so that the target receiving end impedance mode can be determined by using the associated information in subsequent use, thereby improving switching efficiency.

[0098] In some embodiments, the resistance measurement of the sensor in step S31 may be performed as follows: Figure 4 The circuit in the illustrated embodiment uses a Wheatstone bridge circuit to detect the impedance of the signal source by comparing the relationship between the signal source and a known reference impedance. The impedance of the signal source can be obtained by adjusting the impedance of the bridge arm until the bridge is balanced. The circuit includes four resistors R3-R6, R3 is the resistance of a known input device (sensor), and the sensor is connected to the two bridge arms of the Wheatstone bridge. When the Wheatstone bridge is balanced, the voltages at the two input terminals of the operational amplifier connected to the bridge are equal, and the output is zero. At this time, it can be determined that the impedance of the sensor is equal to R6; if the bridge is unbalanced, the differential amplifier will output a voltage difference, and the resistance of the sensor can be calculated based on this voltage difference. The resistance value range of R4-R6 can be set and adjusted according to the resistance value range of the sensor to ensure that the output impedance of the sensor can be measured.

[0099] Through the method in the embodiment shown above, the output impedance of the sensor can be accurately measured using a Wheatstone bridge circuit. After the measurement result is fed back to the controller, the associated receiving end impedance mode can be determined and stored using the measurement result. When the data of the sensor is subsequently received, the stored associated receiving end impedance mode is used to ensure the accuracy of the measurement result, thereby helping to improve the matching degree between the receiving end impedance and the output impedance of the sensor, and further helping to improve the reliability of signal reception assurance.

[0100] Schematic diagrams of some embodiments of the controller disclosed herein are as follows Figure 5 shown.

[0101] The impedance information determination unit 53 can determine the impedance information of the source sensor of the sensor data to be received. In some embodiments, the impedance information determination unit 53 can execute the method in any embodiment of the above step S14.

[0102] The mode determination unit 54 can determine the associated target receiving end impedance mode according to the impedance information. In some embodiments, the mode determination unit 54 can execute the method in any of the embodiments of step S16 above.

[0103] The switching control unit 55 can control the signal receiving end to switch to the target receiving end impedance mode. In some embodiments, the switching control unit 55 can execute the method in any embodiment of the above step S18.

[0104] Based on the controller in the embodiment shown above, the impedance mode of the receiving end can be adjusted according to the impedance information of the sensor at the sensor data sending end, so that the impedance of the receiving end matches the impedance of the sending end, avoiding signal reflection, attenuation, and distortion caused by excessive impedance difference, and improving the signal reception quality of the receiving end from sensors with different impedance conditions.

[0105] In some embodiments, Figure 5 As shown, the controller further includes an impedance information acquiring unit 51 and an associated information determining unit 52.

[0106] The impedance information acquisition unit 51 acquires the impedance information of each sensor. In some embodiments, the impedance information acquisition unit 51 can execute the method in any embodiment of the above step S31.

[0107] The association information determination unit 52 can determine the receiving end impedance pattern matched by each sensor according to the impedance information of each sensor, and associate each sensor with the matching receiving end impedance pattern. In some embodiments, the association information determination unit 52 can execute the method in any embodiment of steps S32 and S33 above.

[0108] Based on the controller in the embodiment shown above, the impedance information of the sensor can be determined in advance, and a matching receiving end impedance mode can be associated with it, so that the target receiving end impedance mode can be determined by using the associated information in subsequent use, thereby improving switching efficiency.

[0109] A schematic diagram of the structure of an embodiment of the controller disclosed in the present invention is shown in FIG. Figure 6 As shown. The controller includes a memory 601 and a processor 602. Among them: the memory 601 can be a disk, a flash memory or any other non-volatile storage medium. The memory is used to store the instructions in the corresponding embodiment of the signal receiving method above. The processor 602 is coupled to the memory 601 and can be implemented as one or more integrated circuits, such as a microprocessor or a microcontroller. The processor 602 is used to execute the instructions stored in the memory, which can improve the signal reception quality of the receiving end from sensors with different impedance conditions.

[0110] In one embodiment, it is also possible to Figure 7As shown, the controller 700 includes a memory 701 and a processor 702. The processor 702 is coupled to the memory 701 via a BUS 703. The controller 700 can also be connected to an external storage device 705 via a storage interface 704 to call external data, and can also be connected to a network or another computer system (not shown) via a network interface 706. No further detailed description will be given here.

[0111] In this embodiment, the data instructions are stored in the memory and then processed by the processor, so that the quality of receiving signals from sensors with different impedance conditions at the receiving end can be improved.

[0112] In another embodiment, a computer-readable storage medium stores computer program instructions, which, when executed by a processor, implement the steps of the method in the corresponding embodiment of the signal receiving method. It should be understood by those skilled in the art that the embodiments of the present disclosure may be provided as methods, devices, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more computer-usable non-transient storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0113] Schematic diagrams of some embodiments of the signal receiving device disclosed in the present invention are as follows Figure 8 shown.

[0114] The control signal receiving port 821 is connected to the output signal of the controller and can receive the control signal output by the controller. The controller can be any of the controllers mentioned above, so that the impedance mode of the receiving end can be adjusted according to the impedance information of the sensor at the sensor data sending end, so that the impedance of the receiving end matches the impedance of the sending end, thereby improving the reliability and accuracy of the impedance mode switching.

[0115] The impedance circuit 822 can adjust the impedance mode of receiving the sensor data according to the control signal and receive the sensor data.

[0116] Based on the signal receiving device in the embodiment shown above, it is possible to switch the impedance mode that matches the sensor data sending end under the control of the controller, thereby avoiding the problems of signal reflection, attenuation, and distortion caused by excessive impedance differences during the signal receiving process, and improving the signal reception quality of the receiving end for sensors with different impedance conditions.

[0117] In some embodiments, the impedance circuit may include a first impedance circuit that can receive sensor data when turned on by a control signal. Figure 2As shown in part 201, the positive input terminal of the first operational amplifier is connected to the signal input terminal of the sensor data via the first resistor, the non-positive input terminal of the first operational amplifier is grounded, and a feedback resistor is included between the positive input terminal and the output terminal of the first operational amplifier.

[0118] The signal receiving device utilizes the high gain characteristics and negative feedback mechanism of the operational amplifier, so that the positive input terminal of the operational amplifier has a high input impedance, so that the high output impedance of the sensor at the signal source end can be well matched with the circuit, which is conducive to the stable transmission of the signal from the high output impedance signal source.

[0119] In some embodiments, the impedance circuit may include a second impedance circuit that can receive sensor data when turned on by a control signal. Figure 2 As shown in part 202, the non-positive input terminal of the second operational amplifier is connected to the signal input terminal of the sensor data via the second resistor, the positive input terminal of the second operational amplifier is grounded, and a feedback resistor is included between the non-positive input terminal and the output terminal of the second operational amplifier.

[0120] The signal receiving device utilizes the low reverse input impedance of the operational amplifier so that the low output impedance of the sensor at the signal source end can be well matched with the circuit, thereby facilitating the stable transmission of the signal from the low output impedance signal source.

[0121] In some embodiments, in the second impedance circuit, the second resistor is a variable circuit, and the second resistor can adjust its resistance under the control of a control signal, so that the impedance can be further refined under low impedance conditions, thereby improving the impedance matching between the sending and receiving ends and further improving the signal transmission quality.

[0122] In some embodiments, the impedance circuit includes a first impedance circuit, a second impedance circuit and an inverter, such as Figure 2 As shown in , the control end of the first operational amplifier circuit and the second operational amplifier circuit are connected to the control signal receiving port, and the inverter is located between the control end of the first operational amplifier circuit or the second operational amplifier circuit and the control signal receiving port.

[0123] Based on the signal receiving device in the embodiment shown above, a connection method of controlling an operational amplifier in a working state by controlling a control level is provided, and selective conduction of two impedance circuits is achieved through a logic circuit, thereby reducing circuit complexity and circuit cost.

[0124] In some embodiments, the first impedance circuit and the second impedance circuit share the same feedback resistor, thereby reducing the number of components required in the impedance circuit, which is beneficial to reducing the cost and complexity of the circuit.

[0125] In some embodiments, the signal receiving device further comprises a measuring circuit capable of detecting impedance information of the sensor and sending the information to the controller. In some embodiments, the measuring circuit can be as follows: Figure 4 As shown in , the impedance of the signal source is detected by comparing the relationship between the signal source and the known reference impedance using a Wheatstone bridge circuit, and the output impedance of the sensor can be accurately measured using the Wheatstone bridge circuit.

[0126] Based on the signal receiving device in the embodiment shown above, the impedance of each sensor can be measured, so that the sensor impedance in the case of multiple manufacturers and multiple models of sensors can be accurately obtained, thereby increasing the scope of application and facilitating field deployment and use.

[0127] Schematic diagrams of some embodiments of the signal receiving system disclosed in the present invention are as follows Fig. 9 shown.

[0128] The signal receiving device 92 may be any of the signal receiving devices mentioned above, for example Figure 8 A signal receiving device in any of the embodiments shown.

[0129] The controller 91 may be any of the controllers mentioned above, for example Figure 5-7 A controller as shown in any embodiment.

[0130] Based on the system in the embodiment shown above, the impedance mode of the receiving end can be adjusted according to the impedance information of the sensor at the sensor data sending end, so that the impedance of the receiving end matches the impedance of the sending end, avoiding signal reflection, attenuation, and distortion caused by excessive impedance difference, and improving the signal reception quality of the receiving end from sensors with different impedance conditions.

[0131] In some embodiments, the signal receiving system shown in the present disclosure can be deployed as a part of a building automation system, thereby helping to improve the signal quality of data collected by various sensors received by the receiving end of the building automation system, and ensuring high-precision and reliable operation of the building automation system.

[0132] The present disclosure is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present disclosure. It should be understood that each process and / or block in the flowchart and / or block diagram and the combination of processes and / or blocks in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1A device that provides the functions specified in a block or multiple blocks.

[0133] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0134] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0135] So far, the present disclosure has been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0136] The method and apparatus of the present disclosure may be implemented in many ways. For example, the method and apparatus of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above order of steps for the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above, unless otherwise specifically stated. In addition, in some embodiments, the present disclosure may also be implemented as a program recorded in a recording medium, which includes machine-readable instructions for implementing the method according to the present disclosure. Therefore, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.

[0137] It should be noted that the terms "first", "second", etc. in the specification, claims, and drawings of the present disclosure are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present disclosure rather than to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present disclosure can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present disclosure, which should be included in the scope of the technical solution for protection of the present disclosure.

Claims

1. A signal receiving method, comprising: Determining impedance information of a source sensor of the sensor data to be received; Determine an associated target receiving end impedance mode according to the impedance information; The signal receiving end is switched to the target receiving end impedance mode, and the sensor data is received.

2. The signal receiving method according to claim 1, further comprising: Obtain impedance information for each sensor; Determine a receiving end impedance mode matched by each sensor according to the impedance information of each sensor; Each of the sensors is associated with a matching receive-end impedance pattern.

3. The signal receiving method according to claim 2, wherein: The obtaining of impedance information of each sensor includes at least one of the following: Determine that a detection signal will be sent to each sensor of the signal receiving end, measure and store impedance information of each sensor; or It is determined that a detection signal will be sent to each sensor of the signal receiving end, configuration information of each sensor is queried, and the impedance information is acquired and stored.

4. The signal receiving method according to claim 1, wherein: The switching of the signal receiving end to the target receiving end impedance mode comprises: Determine a target receiving end impedance circuit corresponding to the target receiving end impedance mode; The signal receiving end is switched to turn on the target receiving end impedance circuit.

5. The signal receiving method according to claim 4, wherein: The switching the signal receiving end to the target receiving end impedance mode further comprises: Determining adjustment parameters of elements of a target receiving end impedance circuit corresponding to the target receiving end impedance mode; The components in the target receiving end impedance circuit are adjusted to the adjustment parameters.

6. The signal receiving method according to claim 4, wherein: The step of determining a target receiving end impedance circuit corresponding to the target receiving end impedance mode comprises: Determine that the target receiving end impedance mode corresponds to a first impedance circuit as the target receiving end impedance circuit, wherein in the first impedance circuit, a positive input terminal of a first operational amplifier is connected to a signal input terminal of the sensor data via a first resistor, a non-positive input terminal of the first operational amplifier is grounded, and a feedback resistor is included between the positive input terminal and the output terminal of the first operational amplifier.

7. The signal receiving method according to any one of claims 4 to 6, wherein: The step of determining a target receiving end impedance circuit corresponding to the target receiving end impedance mode comprises: Determine that the target receiving end impedance mode corresponds to a second impedance circuit as the target receiving end impedance circuit, wherein in the second impedance circuit, the non-positive input terminal of a second operational amplifier is connected to the signal input terminal of the sensor data via a second resistor, the positive input terminal of the second operational amplifier is grounded, and the feedback resistor is included between the non-positive input terminal and the output terminal of the second operational amplifier.

8. The signal receiving method according to claim 7, further comprising: Determine a target resistance value of a second resistor in the second impedance circuit corresponding to the target receiving end impedance mode; The second resistor is adjusted to the target resistance.

9. The signal receiving method according to claim 7, wherein: The signal receiving end includes the first impedance circuit and the second impedance circuit, and the target receiving end impedance circuit is turned on by switching the operational amplifier turned on in the receiving end impedance circuit.

10. The signal receiving method according to claim 9, wherein: The operational amplifier turned on in the switching receiving end impedance circuit includes: Determine a control level output to a control end of an operational amplifier, wherein the control end of the first operational amplifier circuit and the control end of the second operational amplifier circuit are connected to the control signal receiving port, and an inverter is connected between the control end of the first operational amplifier circuit or the second operational amplifier circuit and the control signal receiving port.

11. A controller, comprising: an impedance information determining unit, configured to determine impedance information of a source sensor of the sensor data to be received; a mode determination unit, configured to determine an associated target receiving end impedance mode according to the impedance information; The switching control unit is configured to control the signal receiving end to switch to the target receiving end impedance mode.

12. The controller according to claim 11, further comprising: an impedance information acquisition unit, configured to acquire impedance information of each sensor; The association information determining unit is configured to determine the receiving end impedance pattern matched by each sensor according to the impedance information of each sensor, and associate each sensor with the matched receiving end impedance pattern.

13. A controller comprising: Memory; as well as A processor coupled to the memory, the processor being configured to execute the method according to any one of claims 1 to 10 based on instructions stored in the memory.

14. A computer-readable storage medium having computer instructions stored thereon, which implement the method according to any one of claims 1 to 10 when executed by a processor.

15. A computer program product, comprising a computer program or instructions, wherein when the computer program or instructions are executed by a processor, the method according to any one of claims 1 to 10 is implemented.

16. A signal receiving device, comprising: A control signal receiving port is configured to receive a control signal output by the controller; as well as The impedance circuit is configured to adjust an impedance mode for receiving sensor data according to the control signal and receive the sensor data.

17. The signal receiving device according to claim 16, wherein: The impedance circuit includes at least one of the following: a first impedance circuit, configured to receive sensor data when turned on by the control signal, wherein in the first impedance circuit, a positive input terminal of a first operational amplifier is connected to a signal input terminal of the sensor data via a first resistor, a non-positive input terminal of the first operational amplifier is grounded, and a feedback resistor is included between the positive input terminal and the output terminal of the first operational amplifier; or The second impedance circuit is configured to receive sensor data when being turned on by the control signal, wherein in the second impedance circuit, the non-positive input terminal of the second operational amplifier is connected to the signal input terminal of the sensor data via a second resistor, the positive input terminal of the second operational amplifier is grounded, and the feedback resistor is included between the non-positive input terminal and the output terminal of the second operational amplifier.

18. The signal receiving device according to claim 17, wherein: The second resistor is a variable circuit, and the second resistor is configured to adjust a resistance value under the control of the control signal.

19. The signal receiving device according to claim 17, wherein: The impedance circuit includes the first impedance circuit, the second impedance circuit and an inverter, The control terminals of the first operational amplifier circuit and the second operational amplifier circuit are connected to the control signal receiving port. The inverter is located between the control end of the first operational amplifier circuit or the second operational amplifier circuit and the control signal receiving port.

20. The signal receiving device according to any one of claims 17 to 19, wherein: The impedance circuit includes the first impedance circuit and the second impedance circuit, and the first impedance circuit and the second impedance circuit share the same feedback resistor.

21. The signal receiving device according to claim 16, further comprising: The measuring circuit is configured to detect the impedance information of the sensor and send the impedance information to the controller.

22. The signal receiving device according to claim 16, wherein: The controller is the controller described in any one of claims 11-13.

23. A signal receiving system, comprising: The signal receiving device according to any one of claims 16 to 22; and A controller as claimed in any one of claims 11 to 13.

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