Detection circuit and its driving method, detection system

Abstract

This application provides a detection circuit and its driving method, as well as a detection system. The detection circuit includes: a sensing module, which includes at least one first input control terminal, a first output terminal, and a ground terminal; the sensing module includes at least one first control unit and multiple sensing units connected in parallel; the sensing module is configured to control the sensing units to generate a sensing signal based on an input signal from at least one first input control terminal; and an output module connected to the first output terminal, which includes a second output terminal and multiple output control terminals; the output module is configured to output a detection signal at the second output terminal based on the input signals from the multiple output control terminals and the sensing signal. The technical solution provided in this application, by setting at least one first control unit connected to the sensing units and independently controlling the sensing units, can reduce instantaneous current surges in the circuit, reduce signal crosstalk, thereby improving the quality of the sensing signal and enhancing the accuracy and reliability of the detection signal.

Description

Technical Field

[0001] This application relates to the field of sensor circuit technology, and in particular to a detection circuit and its driving method and detection system. Background Technology

[0002] In recent years, with the rapid development of science and technology, the intersection of electronic science and technology and the medical field has given rise to a new type of sensor that promises to replace human skin—electronic skin. Electronic skin is a novel wearable, flexible, biomimetic tactile sensor with human-like tactile perception capabilities. In the circuitry of this biomimetic tactile sensor, multiple sensors are typically used. However, the operation of multiple sensors presents the problem of large instantaneous current surges, and crosstalk between the sensors is also a significant issue. Summary of the Invention

[0003] In view of this, the embodiments of this application aim to provide a detection circuit and its driving method and detection system to solve the problems of large instantaneous current surges and signal crosstalk in the circuit.

[0004] The first aspect of this application provides a detection circuit, comprising: a sensing module, the sensing module including at least one first input control terminal, a first output terminal and a ground terminal, the sensing module including at least one first control unit and a plurality of sensing units connected in parallel, the control terminal of the first control unit being connected to the first input control terminal, a first terminal of the first control unit being connected to the first terminal of the sensing unit, a second terminal of the first control unit being connected to the ground terminal, and the second terminals of the plurality of sensing units being connected to the first output terminal, the sensing module being configured to control the sensing units to generate a sensing signal based on an input signal from at least one first input control terminal; and an output module, connected to the first output terminal, the output module including a second output terminal and a plurality of output control terminals, the output module being configured to output a detection signal at the second output terminal based on the input signals from the plurality of output control terminals and the sensing signal.

[0005] In one embodiment, the sensing module further includes a plurality of second input control terminals; the sensing module further includes a plurality of second control units, each of which corresponds to a sensing unit. The control terminal of the second control unit is connected to the second input control terminal, the first terminal of each second control unit is connected to the second terminal of its corresponding sensing unit, and the second terminal of the second control unit is connected to the first output terminal.

[0006] In one embodiment, the sensing module further includes multiple third input control terminals; the sensing module further includes multiple third control units, each of which corresponds to a sensing unit, the control terminal of the third control unit is connected to the multiple third input control terminals, the first terminal of the third control unit is connected to the second terminal of the second control unit, and the second terminal of the third control unit is connected to the first output terminal.

[0007] In one embodiment, the sensing module further includes multiple energy storage units, with each energy storage unit corresponding to a sensing unit. The first end of each energy storage unit is connected to the first end of its corresponding sensing unit, and the second end of the energy storage unit is connected to the first end of the third control unit.

[0008] In one embodiment, the plurality of output control terminals include a first output control terminal and a second output control terminal; the output module includes a first transistor and a second transistor, the control electrode of the first transistor is connected to the first output terminal, the first electrode of the first transistor is connected to the first output control terminal, and the second electrode of the first transistor is connected to the first electrode of the second transistor; the second electrode of the second transistor is connected to the second output terminal, and the control electrode of the second transistor is connected to the second output control terminal; preferably, the detection circuit further includes a reset module connected to the first output terminal, the reset module includes a reset input terminal, a reset control terminal and a third output terminal, the third output terminal is connected to the first output terminal, and the reset module is configured to generate a reset signal based on the input signals of the reset input terminal and the reset control terminal, and output the reset signal at the third output terminal.

[0009] The second aspect of this application provides a driving method for a detection circuit, applicable to driving the detection circuit mentioned in any of the above embodiments; the driving method includes: in the acquisition stage, controlling the conduction state of at least one first control unit to enable at least one sensing unit to sense sensing information and obtain a sensing signal; in the output stage, controlling the output module and at least one sensing unit to conduct, and the output module outputs a detection signal at a second output terminal based on the control signal and sensing signal input from multiple output control terminals.

[0010] In one embodiment, the detection circuit includes the detection circuit mentioned in any of the above embodiments; in the acquisition phase, controlling the conduction state of at least one first control unit to enable at least one sensing unit to sense sensing information and obtain a sensing signal includes: in a first stage, controlling at least one first control unit and at least one third control unit to conduct and charge at least one energy storage unit; in a second stage, controlling at least one first control unit and at least one third control unit to disconnect and controlling at least one second control unit to conduct, so that at least one sensing unit can sense sensing information and obtain a sensing signal; preferably, in the output phase, controlling the output module and at least one sensing unit to conduct includes: in a third stage, controlling at least one second control unit to disconnect and controlling at least one third control unit to conduct, so that at least one sensing unit and the output module are conducted.

[0011] In one embodiment, at least one first control unit includes multiple first control units, at least one second control unit includes multiple second control units, and at least one third control unit includes multiple third control units. The driving method includes: in a first stage, controlling multiple first control units to be simultaneously turned on, and controlling multiple third control units to be turned on sequentially, so as to charge multiple energy storage units sequentially; in a second stage, controlling multiple first control units to be simultaneously turned off, and after multiple third control units are turned off sequentially, controlling multiple second control units to be turned on, so as to enable multiple sensing units to sense sensing information and obtain sensing signals; in a third stage, controlling multiple second control units to be turned off, and controlling multiple third control units to be turned on sequentially, so as to enable multiple sensing units and output modules to be turned on sequentially, so as to output signals. The output module outputs a detection signal at the second output terminal based on control signals and sensing signals input from multiple output control terminals; or, in the first stage, multiple first control units are controlled to be turned on in a time-sharing manner, and multiple third control units are controlled to be turned on sequentially to charge multiple energy storage units respectively; in the second stage, multiple first control units are controlled to be turned off in a time-sharing manner, and after multiple third control units are turned off sequentially, multiple second control units are controlled to be turned on so that multiple sensing units can perceive sensing information and obtain sensing signals; in the third stage, multiple second control units are controlled to be turned off, and multiple third control units are controlled to be turned on sequentially so that multiple sensing units and the output module are turned on sequentially, and the output module outputs a detection signal at the second output terminal based on control signals and sensing signals input from multiple output control terminals.

[0012] In one embodiment, after the steps of the first stage, the driving method further includes: in the second stage, after controlling multiple first control units to disconnect and multiple third control units to disconnect sequentially, controlling multiple second control units to simultaneously turn on, so that multiple sensing units can sense sensing information and obtain sensing signals; in the third stage, controlling multiple second control units to disconnect simultaneously and controlling multiple third control units to turn on sequentially, so that multiple sensing units and output modules can turn on sequentially, and the output module outputs a detection signal at a second output terminal based on the control signals and sensing signals input from multiple output control terminals; or, in the second stage, after controlling multiple first control units to disconnect and multiple third control units to disconnect sequentially, controlling multiple second control units to turn on in a time-division manner, so that multiple sensing units can sense sensing information in a time-division manner and obtain sensing signals; in the third stage, controlling multiple second control units to disconnect in a time-division manner and controlling multiple third control units to turn on sequentially, so that multiple sensing units and output modules can turn on sequentially, and the output module outputs a detection signal at a second output terminal based on the control signals and sensing signals input from multiple output control terminals; preferably, the steps of the first stage further include: in the first stage, controlling the reset module to turn on with the sensing module to reset the sensing module.

[0013] A third aspect of this application provides a detection system, including a detection circuit as mentioned in any of the above embodiments.

[0014] The technical solution provided in this application enables individual control of the sensing units by connecting at least one first control unit to the sensing unit. In detection circuits, multiple sensing units connected in parallel suffer from signal crosstalk and large instantaneous current surges. By independently controlling the sensing units, the instantaneous current during sensor module operation can be reduced, minimizing instantaneous current surges in the circuit. Furthermore, the sensing signals from multiple sensing units can be made independent, reducing signal crosstalk between them. Therefore, the technical solution provided in this application can reduce instantaneous current surges in the circuit and decrease signal crosstalk, thereby improving the quality of the sensing signal and enhancing the accuracy and reliability of the detection signal.

[0015] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 The diagram shown is a schematic diagram of the detection circuit provided in an embodiment of this application.

[0018] Figure 2 The diagram shown is a schematic diagram of the detection circuit provided in another embodiment of this application.

[0019] Figure 3 The diagram shown is a schematic diagram of the detection circuit provided in another embodiment of this application.

[0020] Figure 4 The diagram shown is a schematic diagram of the detection circuit provided in another embodiment of this application.

[0021] Figure 5 The diagram shown is a schematic diagram of the detection circuit provided in another embodiment of this application.

[0022] Figure 6 The diagram shown is a schematic flowchart of a driving method for a detection circuit provided in an embodiment of this application.

[0023] Figure 7The diagram shown is a flowchart illustrating a driving method for a detection circuit according to another embodiment of this application.

[0024] Figure 8 The diagram shown is a timing diagram of the control signals of a detection circuit provided in an embodiment of this application.

[0025] Figure 9 The diagram shown is a flowchart illustrating the driving method of the detection circuit provided in another embodiment of this application.

[0026] Figure 10 The diagram shown is a timing diagram of the control signals of a detection circuit provided in another embodiment of this application.

[0027] Figure 11 The diagram shown is a flowchart illustrating the driving method of the detection circuit provided in another embodiment of this application.

[0028] Figure 12 The diagram shown is a timing diagram of the control signals of a detection circuit provided in another embodiment of this application.

[0029] Figure 13 The diagram shown is a schematic flowchart of a driving method for a detection circuit provided in another embodiment of this application.

[0030] Figure 14 The diagram shown is a flowchart illustrating the driving method of the detection circuit provided in another embodiment of this application.

[0031] Figure 15 The diagram shown is a timing diagram of the control signals of a detection circuit provided in another embodiment of this application.

[0032] Figure 16 The diagram shown is a schematic flowchart of a driving method for a detection circuit provided in another embodiment of this application.

[0033] Figure 17 The diagram shown is a timing diagram of the control signals of a detection circuit provided in another embodiment of this application. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0035] Figure 1 The diagram shown is a schematic representation of a detection circuit provided in an embodiment of this application. Figure 1As shown, the detection circuit includes: a sensing module 101, which includes at least one first input control terminal In1, a first output terminal Out1, and a ground terminal Vcom. The sensing module 101 includes at least one first control unit P and a plurality of sensing units D connected in parallel. The control terminal of the first control unit P is connected to the first input control terminal In1. The first terminal of the first control unit P is connected to the first terminal of the sensing unit D. The second terminal of the first control unit P is connected to the ground terminal Vcom. The second terminals of the plurality of sensing units D are connected to the first output terminal Out1. The sensing module 101 is configured to control the sensing units D to generate a sensing signal based on the input signal of at least one first input control terminal In1. An output module 102 is connected to the first output terminal Out1. The output module 102 includes a second output terminal Readout and a plurality of output control terminals Opc. The output module 102 is configured to output a detection signal at the second output terminal Readout based on the input signal of the plurality of output control terminals Opc and the sensing signal.

[0036] Specifically, the first input control terminal In1 is used to receive the first control signal SP, and the first output terminal Out1 is used to output the sensing signal. The sensing module 101 includes multiple sensing units D connected in parallel, and the multiple sensing units D are of different types. The different types of multiple sensing units D mean that different sensing units D measure different physical quantities. For example, the multiple sensing units D may include pressure sensors, temperature sensors, light sensors, or humidity sensors, etc. This application does not limit the response characteristics of the multiple sensing units D. For example, the multiple sensing units D may include resistive sensing units, inductive sensing units, or capacitive sensing units, etc. For the sake of simplicity, the embodiments of this application use resistive sensing units as an example. For example, the first control unit P includes a P-type power switching device or an N-type power switching device.

[0037] During the operation of the detection circuit, at least one first control unit P is connected to a sensing unit D. The control terminal of the first control unit P receives a first control signal SP, turning on the first control unit P and connecting the sensing unit D to the ground terminal Vcom through the first control unit P. When the measured physical quantity acts on the sensing unit D, the parameters of the sensing unit D change, causing a change in the current value passing through the sensing unit D or a change in the voltage across the sensing unit D. An electrical signal characterizing this change, i.e., a sensing signal, can be output at the first output terminal Out1. The sensing signals transmitted by multiple sensing units D are output to the output module 102 through the first output terminal Out1. The output module 102 processes the sensing signals based on the input signals from multiple output control terminals Opc and outputs a detection signal at the second output terminal Readout. For example, the output module 102 amplifies and filters the sensing signals to generate a precise electrical signal that is a function of the measured physical quantity, which is then output as a detection signal at the second output terminal Readout.

[0038] In the detection circuit, the sensing signals of multiple sensing units D are transmitted through a common signal transmission line. Due to the parasitic capacitance and inductance of the line, the sensing signals of different sensing units D may couple with each other during transmission, causing unexpected changes in voltage or current on the signal line, thus causing signal crosstalk. Furthermore, when the sensing module 101 starts up or the circuit state changes rapidly (e.g., the sensing signal of sensing module 101 changes rapidly), instantaneous current surges can easily occur in the circuit. Therefore, by setting the first control unit P to independently control the sensing units D, allowing multiple sensing units D to be turned on sequentially, the instantaneous current demand on the power supply can be reduced, thereby reducing instantaneous current surges; and by making the sensing signals of each sensing unit D independent, the quality of the sensing signals can be further improved, reducing the impact of signal crosstalk.

[0039] The technical solution provided in this embodiment enables individual control of the sensing unit D by connecting at least one first control unit P to the sensing unit D. In the detection circuit, multiple sensing units D connected in parallel exhibit signal crosstalk and large instantaneous current surges. By independently controlling the sensing units D, the instantaneous current during the operation of the sensing module 101 can be reduced, thus minimizing instantaneous current surges in the circuit. Furthermore, the sensing signals of multiple sensing units D can be made independent, reducing signal crosstalk between them. Therefore, the technical solution provided in this embodiment can reduce instantaneous current surges in the circuit and decrease signal crosstalk, thereby improving the quality of the sensing signal and enhancing the accuracy and reliability of the detection signal.

[0040] Figure 2 The diagram shown is a structural schematic of a detection circuit provided in another embodiment of this application. Figure 2As shown, the sensing module 101 also includes multiple second input control terminals In2; the sensing module 101 also includes multiple second control units k, each of which corresponds to a sensing unit D. The control terminal of the second control unit k is connected to the second input control terminal In2. The first terminal of each second control unit k is connected to the second terminal of its corresponding sensing unit D, and the second terminal of the second control unit k is connected to the first output terminal Out1.

[0041] Specifically, the second input control terminal In2 is used to receive the second control signal Sk. The sensing module 101 also includes a plurality of second control units k, each corresponding to a sensing unit D, and each second control unit k is used to control its corresponding sensing unit D. For example, the second control unit k includes a P-type power switch device or an N-type power switch device.

[0042] During the operation of the detection circuit, the control terminal of the second control unit k receives the second control signal Sk, and the second control unit k is turned on, so that the sensing unit D is connected to the first output terminal Out1 through the second control unit k. When the sensing unit D generates a sensing signal, the sensing signal is transmitted to the first output terminal Out1 through the turned-on second control unit k, and then output to the output module 102 through the first output terminal Out1.

[0043] This embodiment sets up a second control unit k between each sensing unit D and the first output terminal Out1. The second control unit k controls the on / off state between the sensing unit D and the first output terminal Out1, allowing each sensing unit D to output a sensing signal independently. This configuration further reduces the instantaneous current demand on the power supply, thereby reducing instantaneous current surges, further improving the quality of the sensing signal, and reducing the impact of signal crosstalk.

[0044] Figure 3 The diagram shown is a structural schematic of a detection circuit provided in another embodiment of this application. Figure 3 As shown, the sensing module 101 also includes multiple third input control terminals In3; the sensing module 101 also includes multiple third control units S, the third control units S and the sensing units D correspond one-to-one, the control terminal of the third control unit S is connected to the multiple third input control terminals In3, the first terminal of the third control unit S is connected to the second terminal of the second control unit k, and the second terminal of the third control unit S is connected to the first output terminal Out1.

[0045] Specifically, the third input control terminal In3 is used to connect the third control signal SS1. The sensing module 101 also includes multiple third control units S, each corresponding to a sensing unit D, and each third control unit S is used to control its corresponding sensing unit D. For example, the third control unit S includes a P-type power switch device or an N-type power switch device.

[0046] The first terminal of each third control unit S is connected to the second terminal of the corresponding second control unit k connected to the sensing unit D, forming a cascaded control structure. During the operation of the detection circuit, the control terminal of the third control unit S receives the third control signal SS1, and the third control unit S is turned on, so that the sensing unit D is connected to the first output terminal Out1 through the third control unit S. When the sensing unit D generates a sensing signal, the sensing signal is transmitted to the first output terminal Out1 through the turned-on second control unit k and third control unit S, and then output to the output module 102 through the first output terminal Out1.

[0047] This embodiment forms a cascaded control structure by placing a third control unit S between each second control unit k and the first output terminal Out1. The second control unit k and the third control unit S jointly control the on / off state between the sensing unit D and the first output terminal Out1, allowing each sensing unit D to independently output a sensing signal. This arrangement increases the control hierarchy, improves control accuracy, further reduces the instantaneous current demand on the power supply, thereby reducing instantaneous current surges, further improving the quality of the sensing signal, and reducing the impact of signal crosstalk.

[0048] Figure 4 The diagram shown is a structural schematic of a detection circuit provided in another embodiment of this application. Figure 4 As shown, the sensing module 101 also includes multiple energy storage units C, with each energy storage unit C corresponding to a sensing unit D. The first end of each energy storage unit C is connected to the first end of its corresponding sensing unit D, and the second end of the energy storage unit C is connected to the first end of the third control unit S.

[0049] Specifically, the sensing module 101 also includes multiple energy storage units C, each corresponding to a sensing unit D, with each energy storage unit C connected in parallel to a sensing unit D. During the operation of the detection circuit, the first control unit P is turned on, and multiple third control units S are sequentially turned on to charge the energy storage units C. After a preset charging time, the first control unit P is turned off, and multiple second control units k are turned on, allowing the sensing unit D to sense information and generate a sensing signal. The parameters of the sensing unit D change with the measured physical quantity, affecting the charge release rate of the energy storage unit C, thus changing the current value passing through the sensing unit D and causing the sensing unit D to generate a sensing signal. After the sensing unit D generates a sensing signal, the sensing signals transmitted by the multiple sensing units D are output to the output module 102 through the first output terminal Out1. The output module 102 processes the sensing signals based on the input signals from the multiple output control terminals Opc and outputs the detection signal at the second output terminal Readout.

[0050] In this embodiment, an energy storage unit C is connected in parallel across each sensing unit D. By controlling the charging and discharging of the energy storage unit C, the sensing unit D converts the sensed information into a sensing signal. This configuration, by controlling the charging and discharging process of the energy storage unit C, smooths the current waveform in the circuit, reduces current peak values, further minimizes instantaneous current surges, and the energy storage unit C also acts as an isolation unit, reducing signal crosstalk between different sensing units D, thereby further improving the quality of the sensing signal and reducing the impact of signal crosstalk.

[0051] Figure 5 The diagram shown is a structural schematic of a detection circuit provided in another embodiment of this application. Figure 5 As shown, the multiple output control terminals Opc include a first output control terminal VDDS and a second output control terminal Select; the output module 102 includes a first transistor Tsf and a second transistor Tslt. The control electrode of the first transistor Tsf is connected to the first output terminal Out1, the first electrode of the first transistor Tsf is connected to the first output control terminal VDDS, and the second electrode of the first transistor Tsf is connected to the first electrode of the second transistor Tslt; the second electrode of the second transistor Tslt is connected to the second output terminal Readout, and the control electrode of the second transistor Tslt is connected to the second output control terminal Select; preferably, the detection circuit further includes a reset module 103 connected to the first output terminal Out1. The reset module 103 includes a reset input terminal Vrst, a reset control terminal Reset, and a third output terminal Out2. The third output terminal Out2 is connected to the first output terminal Out1. The reset module 103 is configured to generate a reset signal based on the input signals of the reset input terminal Vrst and the reset control terminal Reset, and output the reset signal at the third output terminal Out2.

[0052] Specifically, the first output control terminal VDDS is used to receive the fourth control signal, and the second output control terminal Select is used to receive the fifth control signal SSelect. During the operation of the detection circuit, the control electrode of the first transistor Tsf is connected to the sensing signal output from the first output terminal Out1, and the first transistor Tsf is turned on. When the first electrode of the first transistor Tsf is connected to the fourth control signal, the potential at the second electrode of the first transistor Tsf increases, which in turn increases the potential at the first electrode of the second transistor Tslt. When the control electrode of the second transistor Tslt is turned on by the fifth control signal SSelect, the potential at the second electrode of the second transistor Tslt increases, and a signal is output through the second output terminal Readout. This signal is the detection signal. The magnitude of this detection signal is related to the fourth control signal.

[0053] When the detection circuit starts, the sensor module 101 is first reset. The reset input terminal Vrst is used to connect the sixth control signal, and the reset control terminal Reset is used to connect the seventh control signal SReset. See also Figure 5 The reset module 103 includes a third transistor Trst. The control electrode of the third transistor Trst is connected to the reset control terminal Reset, the first electrode of the third transistor Trst is connected to the reset input terminal Vrst, and the second electrode of the third transistor Trst is connected to the third output terminal Out2. The control electrode of the third transistor Trst is connected to the seventh control signal SReset, which turns on the third transistor Trst. The first electrode of the third transistor Trst is connected to the sixth control signal, and a reset signal is output at the second electrode of the third transistor Trst (i.e., the third output terminal Out2). This reset signal is connected to the sensing module 101 through the first output terminal Out1, thereby resetting the sensing module 101.

[0054] This embodiment uses a first transistor Tsf and a second transistor Tslt in the output module 102 to control their conduction, processing the sensing signal output from the sensing module 101 and outputting a detection signal. This configuration further maintains the stability of the sensing signal, improves its quality, and reduces the impact of signal crosstalk. Furthermore, the reset module 103 in this embodiment enables rapid reset of the sensing module 101. When the sensing module 101 malfunctions or needs reinitialization, the reset signal quickly restores it to its initial state. The reset module 103 helps maintain the stability of the detection circuit and prevents malfunctions caused by accumulated errors or unexpected conditions.

[0055] Figure 6 The diagram shown is a schematic flowchart of a driving method for a detection circuit according to an embodiment of this application. This driving method is applicable to driving the detection circuit mentioned in any of the above embodiments. Figure 6 As shown, the driving method includes: S110, during the acquisition phase, control the conduction state of at least one first control unit so that at least one sensing unit can perceive sensing information and obtain a sensing signal.

[0056] Specifically, during the data acquisition phase, a first control signal is input to the control terminal of at least one first control unit to turn on the first control unit, and the sensing unit is connected to the ground terminal through the first control unit. When the measured physical quantity acts on the sensing unit, the parameters of the sensing unit will change, thereby changing the current value through the sensing unit or the voltage across the sensing unit. This change is the sensing signal.

[0057] S120, in the output stage, the control output module and at least one sensing unit are turned on, and the output module outputs a detection signal at the second output terminal based on the control signals and sensing signals input from multiple output control terminals.

[0058] Specifically, in the output stage, control signals are input to multiple output control terminals to enable the output module and at least one sensing unit to conduct. The output module processes the sensing signals based on the input signals from the multiple output control terminals and outputs a detection signal at the second output terminal.

[0059] The technical solution provided in this embodiment controls the conduction state of at least one first control unit during the acquisition phase, enabling at least one sensing unit to perceive sensing information and obtain sensing signals. This setup allows for individual control of each sensing unit. During the output phase, the output module and at least one sensing unit are connected, and the output module outputs a detection signal at a second output terminal based on control signals and sensing signals input from multiple output control terminals. This setup improves the stability of the sensing signals. In the detection circuit, multiple sensing units are connected in parallel, resulting in signal crosstalk and large instantaneous current surges. By independently controlling the sensing units, the instantaneous current during sensor module operation can be reduced, minimizing instantaneous current surges in the circuit; furthermore, the sensing signals of multiple sensing units can be made independent, reducing signal crosstalk between them. Therefore, the technical solution provided in this embodiment can reduce instantaneous current surges in the circuit, reduce signal crosstalk, thereby improving the quality of the sensing signals and enhancing the accuracy and reliability of the detection signals.

[0060] Figure 7 The diagram shown is a flowchart of a driving method for a detection circuit provided in another embodiment of this application. This driving method is applicable to driving the detection circuit mentioned in any of the above embodiments. Figure 8 The diagram shown is a timing diagram of the control signals for a detection circuit provided in an embodiment of this application. Figure 7 As shown, based on the above embodiments, optionally, during the acquisition phase, the conduction state of at least one first control unit is controlled to enable at least one sensing unit to perceive sensing information and obtain sensing signals, including: S210, in the first stage, at least one first control unit and at least one third control unit are turned on to charge at least one energy storage unit.

[0061] Specifically, see Figure 8 In the first stage t1, a high-potential first control signal SP and a third control signal SS1 are respectively input to the control terminal of at least one first control unit and the control terminal of at least one third control unit, so that at least one first control unit and at least one third control unit are turned on to charge at least one energy storage unit for a preset time.

[0062] S220, in the second stage, at least one first control unit and at least one third control unit are disconnected, and at least one second control unit is turned on, so that at least one sensing unit can sense sensing information and obtain a sensing signal.

[0063] Specifically, see Figure 8 In the second stage t2, the first control signal SP and the third control signal SS1 are set low, disconnecting at least one first control unit and at least one third control unit. Simultaneously, a high-potential second control signal Sk is input to the control terminal of at least one second control unit, turning it on and enabling at least one sensing unit to perceive sensor information. In the second stage t2, at least one energy storage unit begins to discharge, and at least one sensing unit generates a sensing signal after being acted upon by the measured physical quantity.

[0064] Preferably, during the output phase, controlling the output module and at least one sensing unit to be turned on includes: S230, in the third stage, controls at least one second control unit to disconnect and controls at least one third control unit to turn on, so that at least one sensing unit and output module are turned on.

[0065] Specifically, see Figure 8 In the third stage t3, the second control signal Sk is set low, causing at least one second control unit to disconnect. A high-level third control signal SS1 is then input to the control terminal of at least one third control unit, causing it to turn on, thereby turning on at least one sensing unit and the output module. A fifth control signal SSelect is input to the second output control terminal, causing the output module to process the sensing signal and output a detection signal SReadout at the second output terminal.

[0066] In this embodiment, by dividing the acquisition phase into a first phase t1 and a second phase t2, the timing of the on and off of at least one first control unit, at least one second control unit, and at least one third control unit is controlled respectively. This allows at least one energy storage unit to charge in the first phase t1 and discharge in the second phase t2, while at least one sensing unit generates a sensing signal in the second phase t2. Furthermore, in the third phase t3, at least one sensing unit and the output module are turned on to output the sensing signal. This configuration further reduces the instantaneous current demand on the power supply, thereby reducing instantaneous current surges, further improving the quality of the sensing signal, and reducing the impact of signal crosstalk.

[0067] Figure 9 The diagram shown is a flowchart of a driving method for a detection circuit provided in another embodiment of this application. This driving method is applicable to driving the detection circuit mentioned in any of the above embodiments. Figure 10The diagram shown is a timing diagram of control signals for a detection circuit according to another embodiment of this application. Optionally, based on the above embodiments, at least one first control unit includes multiple first control units, at least one second control unit includes multiple second control units, and at least one third control unit includes multiple third control units. For example... Figure 9 As shown, the driving method includes: S310, in the first stage, controls multiple first control units to be turned on simultaneously, and controls multiple third control units to be turned on sequentially, so as to charge multiple energy storage units in sequence.

[0068] Specifically, see Figure 10 In the first stage t1, a high-potential first control signal SP is simultaneously input to the control terminals of multiple first control units, causing the multiple first control units to conduct simultaneously. Meanwhile, multiple high-potential third control signals SS1, SS2...SSn are sequentially input to the control terminals of multiple third control units, controlling each third control signal SS1 to go low after a preset time, causing the multiple third control units to conduct sequentially and charge the multiple energy storage units in sequence.

[0069] S320, in the second stage, multiple first control units are simultaneously disconnected, and after multiple third control units are disconnected in sequence, multiple second control units are turned on so that multiple sensing units can sense sensing information and obtain sensing signals.

[0070] Specifically, see Figure 10 In the second stage t2, the first control signal SP is set low, causing multiple first control units to disconnect simultaneously. After multiple third control units are disconnected in sequence, a high-level second control signal Sk is input to the control terminals of multiple second control units, causing multiple second control units to turn on, so that multiple sensing units can perceive sensing information and obtain sensing signals.

[0071] In the third stage, S330 controls multiple second control units to disconnect and controls multiple third control units to turn on sequentially, so that multiple sensing units and output modules are turned on sequentially. The output module outputs a detection signal at the second output terminal based on the control signals and sensing signals input from multiple output control terminals.

[0072] Specifically, see Figure 10 In the third stage t3, the second control signal Sk is set low, causing multiple second control units to disconnect. Then, multiple high-level third control signals SS1, SS2...SSn are sequentially input to the control terminals of multiple third control units. Each third control signal SS1 is set low after a preset time, causing the multiple third control units to sequentially turn on, thereby sequentially turning on multiple sensing units and the output module. Based on the control signals and sensing signals input from the multiple output control terminals, the output module outputs a detection signal SReadout at its second output terminal.

[0073] In this embodiment, by controlling the timing of the on and off of multiple first control units, second control units, and third control units, independent control of the sensing units is achieved when multiple sensing units work together. This configuration can further reduce the instantaneous current when the sensing module is working, reducing instantaneous current surges in the circuit; and it can also make the sensing signals of multiple sensing units independent of each other, reducing signal crosstalk between multiple sensing units.

[0074] Figure 11 The diagram shown is a flowchart of a driving method for a detection circuit provided in another embodiment of this application. This driving method is applicable to driving the detection circuit mentioned in any of the above embodiments. Figure 12 The diagram shown is a timing diagram of the control signals for a detection circuit provided in another embodiment of this application. Figure 11 As shown, based on the above embodiments, optionally, the driving method includes: S410, in the first stage, controls multiple first control units to be turned on in a time-sharing manner, and controls multiple third control units to be turned on in sequence, so as to charge multiple energy storage units respectively.

[0075] Specifically, see Figure 12 In the first stage t1, high-potential first control signals SP1, SP2...SPn are input to the control terminals of multiple first control units in a time-division manner, causing the multiple first control units to be turned on in a time-division manner. The turn-on time of each first control unit is related to the type of its corresponding sensing unit. Meanwhile, multiple high-potential third control signals SS1, SS2...SSn are sequentially input to the control terminals of multiple third control units, controlling each third control signal SS1 to be set low after a preset time, causing the multiple third control units to be turned on sequentially, charging multiple energy storage units respectively.

[0076] S420, in the second stage, controls multiple first control units to disconnect in a time-sharing manner. After multiple third control units are disconnected in sequence, controls multiple second control units to turn on, so that multiple sensing units can perceive sensing information and obtain sensing signals.

[0077] Specifically, see Figure 12 In the second stage t2, the first control signal SP is set low at different times, causing multiple first control units to disconnect in a time-sharing manner. After multiple third control units are disconnected in sequence, a high-level second control signal Sk is input to the control terminals of multiple second control units, causing multiple second control units to turn on, so that multiple sensing units can perceive sensing information and obtain sensing signals.

[0078] In the third stage, S430 controls multiple second control units to disconnect and controls multiple third control units to turn on sequentially, so that multiple sensing units and output modules are turned on sequentially. The output module outputs a detection signal at the second output terminal based on the control signals and sensing signals input from multiple output control terminals.

[0079] Specifically, see Figure 12 In the third stage t3, the second control signal Sk is set low, causing multiple second control units to disconnect. Then, multiple high-level third control signals SS1, SS2...SSn are sequentially input to the control terminals of multiple third control units. Each third control signal SS1 is set low after a preset time, causing the multiple third control units to sequentially turn on, thereby sequentially turning on multiple sensing units and the output module. Based on the control signals and sensing signals input from the multiple output control terminals, the output module outputs a detection signal SReadout at its second output terminal.

[0080] In this embodiment, by controlling multiple first control units to be turned on and off in a time-division manner, the instantaneous current of the sensing module during operation is further reduced when multiple sensing units work together, thereby reducing the instantaneous current surge in the circuit; and the sensing signals of multiple sensing units can be made independent of each other, reducing signal crosstalk between multiple sensing units.

[0081] Figure 13 The diagram shown is a flowchart illustrating a driving method for a detection circuit according to another embodiment of this application. This driving method is applicable to driving the detection circuit mentioned in any of the above embodiments. Figure 13 As shown, based on the above embodiments, optionally, after the step of the first stage t1, the driving method further includes: S510, in the second stage, after controlling multiple first control units to disconnect and multiple third control units to disconnect in sequence, controlling multiple second control units to simultaneously turn on, so that multiple sensing units can sense sensing information and obtain sensing signals.

[0082] Specifically, see Figure 10 and Figure 12 In the second stage t2, after multiple first control units are disconnected and multiple third control units are disconnected in sequence, a high-potential second control signal Sk is simultaneously input to the control terminals of multiple second control units to turn on multiple second control units so that multiple sensing units can perceive sensing information and obtain sensing signals.

[0083] In the third stage, S520 controls multiple second control units to disconnect simultaneously and controls multiple third control units to turn on sequentially, so that multiple sensing units and output modules are turned on sequentially. The output module outputs a detection signal at the second output terminal based on the control signals and sensing signals input from multiple output control terminals.

[0084] Specifically, see Figure 10 and Figure 12 In the third stage t3, the second control signal Sk is set low, causing multiple second control units to disconnect simultaneously. Then, multiple high-level third control signals SS1, SS2...SSn are sequentially input to the control terminals of multiple third control units. Each third control signal SS1 is set low after a preset time, causing the multiple third control units to sequentially turn on, thereby sequentially turning on multiple sensing units and the output module. Based on the control signals and sensing signals input from the multiple output control terminals, the output module outputs a detection signal SReadout at its second output terminal.

[0085] In this embodiment, by controlling multiple second control units to simultaneously turn on and off at corresponding stages, the working efficiency of the detection circuit is improved when multiple sensing units work together.

[0086] Figure 14 The diagram shown is a flowchart of a driving method for a detection circuit provided in another embodiment of this application. This driving method is applicable to driving the detection circuit mentioned in any of the above embodiments. Figure 15 The diagram shown is a timing diagram of the control signals for a detection circuit provided in another embodiment of this application. Figure 14 As shown, based on the above embodiments, optionally, after the steps of the first stage, the driving method further includes: S610, in the second stage, after controlling multiple first control units to disconnect and multiple third control units to disconnect in sequence, controlling multiple second control units to turn on in a time-sharing manner so that multiple sensing units can sense sensing information in a time-sharing manner and obtain sensing signals.

[0087] Specifically, see Figure 15 In the second stage t2, after multiple first control units are disconnected and multiple third control units are sequentially disconnected, high-potential second control signals Sk, Sk2…Skn are time-divisionally input to the control terminals of multiple second control units, causing multiple second control units to be time-divisionally turned on, so that multiple sensing units can sense information and obtain sensing signals in a time-division manner. The time for each second control unit to be turned on is related to the type of its corresponding sensing unit.

[0088] In the third stage, S620 controls multiple second control units to disconnect in a time-sharing manner and controls multiple third control units to turn on sequentially, so that multiple sensing units and output modules are turned on sequentially. The output module outputs a detection signal at the second output terminal based on the control signals and sensing signals input from multiple output control terminals.

[0089] Specifically, see Figure 15In the third stage t3, the second control signal Sk is set low at different times, causing multiple second control units to disconnect in a time-sharing manner. Then, multiple high-level third control signals SS1, SS2...SSn are sequentially input to the control terminals of multiple third control units. Each third control signal SS1 is set low after a preset time, causing the multiple third control units to turn on sequentially, thereby turning on multiple sensing units and the output module sequentially. Based on the control signals and sensing signals input from the multiple output control terminals, the output module outputs a detection signal SReadout at its second output terminal.

[0090] In this embodiment, by controlling multiple second control units to turn on and off in a time-division manner, the instantaneous current of the sensing module during operation is further reduced when multiple sensing units work together, thereby reducing the instantaneous current surge in the circuit; and the sensing signals of multiple sensing units can be made independent of each other, reducing signal crosstalk between multiple sensing units.

[0091] Figure 16 The diagram shown is a flowchart of a driving method for a detection circuit provided in another embodiment of this application. This driving method is applicable to driving the detection circuit mentioned in any of the above embodiments. Figure 17 The diagram shown is a timing diagram of the control signals for a detection circuit provided in another embodiment of this application. Figure 16 As shown, based on the above embodiments, the driving method may optionally further include: S710, in the first stage, the control reset module is connected to the sensing module to reset the sensing module.

[0092] Specifically, see Figure 17 In the first stage t1, a high-potential seventh control signal SReset is input to the reset control terminal, which enables the reset module and the sensing module to conduct. Based on the input signals from the reset input terminal and the reset control terminal, the reset module generates a reset signal and outputs it to the sensing module to reset the sensing module.

[0093] In this embodiment, by controlling the reset module and the sensing module to be turned on in the first stage t1, the sensing module can be quickly reset. When the sensing module malfunctions or needs to be reinitialized, the reset signal can quickly restore the sensing module to its initial state, further maintaining the stability of the sensing signal.

[0094] This application also provides a detection system, including a detection circuit as mentioned in any of the above embodiments. The detection system provided in this application has the beneficial effects of the detection circuit mentioned in the above embodiments, and its technical principle and the effects produced are similar, so they will not be described again here.

[0095] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this application can be achieved, and this is not limited herein.

[0096] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A detection circuit, characterized in that, include: A sensing module includes at least one first input control terminal, a first output terminal, and a ground terminal. The sensing module includes at least one first control unit and a plurality of sensing units connected in parallel. The control terminal of the first control unit is connected to the first input control terminal. A first terminal of the first control unit is connected to a first terminal of the sensing unit. A second terminal of the first control unit is connected to the ground terminal. The second terminals of the plurality of sensing units are connected to the first output terminal. The sensing module is configured to control the sensing units to generate sensing signals based on the input signal of at least one first input control terminal. An output module is connected to the first output terminal. The output module includes a second output terminal and multiple output control terminals. The output module is configured to output a detection signal at the second output terminal based on the input signals of the multiple output control terminals and the sensing signal.

2. The detection circuit according to claim 1, characterized in that, The sensing module further includes multiple second input control terminals; the sensing module further includes multiple second control units, each of which corresponds to a sensing unit. The control terminal of the second control unit is connected to the second input control terminal. The first terminal of each second control unit is connected to the second terminal of its corresponding sensing unit. The second terminal of the second control unit is connected to the first output terminal.

3. The detection circuit according to claim 2, characterized in that, The sensing module further includes multiple third input control terminals; the sensing module further includes multiple third control units, each of which corresponds to a sensing unit. The control terminal of the third control unit is connected to the multiple third input control terminals, the first terminal of the third control unit is connected to the second terminal of the second control unit, and the second terminal of the third control unit is connected to the first output terminal.

4. The detection circuit according to claim 3, characterized in that, The sensing module also includes multiple energy storage units, each corresponding to a sensing unit. The first end of each energy storage unit is connected to the first end of its corresponding sensing unit, and the second end of each energy storage unit is connected to the first end of the third control unit.

5. The detection circuit according to claim 4, characterized in that, The plurality of output control terminals include a first output control terminal and a second output control terminal; the output module includes a first transistor and a second transistor, the control electrode of the first transistor is connected to the first output terminal, the first electrode of the first transistor is connected to the first output control terminal, and the second electrode of the first transistor is connected to the first electrode of the second transistor; the second electrode of the second transistor is connected to the second output terminal, and the control electrode of the second transistor is connected to the second output control terminal. Preferably, the detection circuit further includes a reset module connected to the first output terminal. The reset module includes a reset input terminal, a reset control terminal, and a third output terminal. The third output terminal is connected to the first output terminal. The reset module is configured to generate a reset signal based on the input signals of the reset input terminal and the reset control terminal, and output the reset signal at the third output terminal.

6. A driving method for a detection circuit, characterized in that, Suitable for driving the detection circuit according to any one of claims 1-5; the driving method includes: During the acquisition phase, the conduction state of at least one of the first control units is controlled so that at least one of the sensing units can perceive sensing information and obtain the sensing signal. During the output phase, the output module and at least one of the sensing units are turned on, and the output module outputs the detection signal at the second output terminal based on the control signals input from the multiple output control terminals and the sensing signals.

7. The driving method according to claim 6, characterized in that, The detection circuit includes the detection circuit as described in claim 5; in the acquisition phase, controlling the conduction state of at least one of the first control units to enable at least one of the sensing units to perceive sensing information and obtain the sensing signal includes: In the first stage, at least one of the first control units and at least one of the third control units are turned on to charge at least one of the energy storage units; In the second stage, at least one of the first control units and at least one of the third control units are disconnected, and at least one of the second control units is turned on, so that at least one of the sensing units can sense sensing information and obtain the sensing signal. Preferably, in the output phase, controlling the output module and at least one of the sensing units to be turned on includes: In the third stage, at least one of the second control units is disconnected, and at least one of the third control units is turned on, so that at least one of the sensing units and the output module are turned on.

8. The driving method according to claim 7, characterized in that, At least one first control unit includes a plurality of first control units, at least one second control unit includes a plurality of second control units, at least one third control unit includes a plurality of third control units, and the driving method includes: In the first stage, multiple first control units are simultaneously turned on, and multiple third control units are sequentially turned on to charge multiple energy storage units in sequence. In the second stage, multiple first control units are simultaneously disconnected. After multiple third control units are disconnected in sequence, multiple second control units are turned on so that multiple sensing units can sense sensing information and obtain the sensing signal. In the third stage, multiple second control units are disconnected and multiple third control units are sequentially turned on, so that multiple sensing units and the output module are sequentially turned on. The output module outputs a detection signal at the second output terminal based on the control signals input from multiple output control terminals and the sensing signals. Alternatively, in the first stage, multiple first control units are controlled to be turned on in a time-sharing manner, and multiple third control units are controlled to be turned on sequentially, so as to charge multiple energy storage units respectively; In the second stage, multiple first control units are controlled to disconnect in a time-sharing manner. After multiple third control units are disconnected in sequence, multiple second control units are controlled to turn on, so that multiple sensing units can perceive sensing information and obtain the sensing signal. In the third stage, multiple second control units are disconnected, and multiple third control units are sequentially turned on, so that multiple sensing units and the output module are sequentially turned on. The output module outputs a detection signal at the second output terminal based on the control signals input from multiple output control terminals and the sensing signals.

9. The driving method according to claim 8, characterized in that, Following the steps of the first stage, the following is also included: In the second stage, after controlling multiple first control units to disconnect and multiple third control units to disconnect sequentially, controlling multiple second control units to simultaneously turn on, so that multiple sensing units can perceive sensing information and obtain the sensing signal; In the third stage, multiple second control units are simultaneously disconnected, and multiple third control units are sequentially turned on, so that multiple sensing units and the output module are sequentially turned on. The output module outputs a detection signal at the second output terminal based on the control signals input from multiple output control terminals and the sensing signals. Alternatively, in the second stage, after controlling multiple first control units to disconnect and multiple third control units to disconnect sequentially, controlling multiple second control units to turn on in a time-division manner, so that multiple sensing units can sense sensing information in a time-division manner and obtain the sensing signal; In the third stage, multiple second control units are controlled to disconnect in a time-division manner, and multiple third control units are controlled to turn on sequentially, so that multiple sensing units and the output module are turned on sequentially. The output module outputs a detection signal at the second output terminal based on the control signals input from multiple output control terminals and the sensing signals. Preferably, the steps in the first stage further include: In the first stage, the reset module is connected to the sensing module to reset the sensing module.

10. A detection system, characterized in that, include: The detection circuit as described in any one of claims 1 to 5.

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