Detection circuit and detection device for detecting effectiveness of conducting medium

Abstract

The utility model provides a detection circuit and a detection device for detecting the effectiveness of a conducting medium, the detection circuit comprises at least one detection end, an acquisition module and a detection module, the detection module comprises a plurality of comparison units, and the number of the comparison units corresponds to the preset effectiveness grade of the conducting medium. When the effectiveness of conductive cut-off is detected, the detection end is placed in a conductive medium to be detected, and each comparison unit compares an electrical parameter output by the detection end and acquired by the acquisition module with a preset parameter threshold. And according to the comparison result, determining and outputting a detection result for representing the validity grade of the to-be-detected conducting medium at the detection end placement position. According to the invention, the effectiveness of different positions of the conductive medium can be simply, effectively and quickly detected, and the conductive medium is evaluated according to the preset effectiveness grade, so that the conductive medium is convenient to use, store and discard; and meanwhile, the circuit is simple in structure and has relatively high detection precision.

Description

Technical Field

[0001] The utility model relates to the technical field of conductive detection, and particularly relates to a detection circuit and a detection device for detecting the effectiveness of a conductive medium. Background Art

[0002] During a surgical operation, the anesthesia process before the operation is extremely important. Once the anesthesia dosage is incorrect or the operation time cannot be well controlled, it will cause great pain to the patient during the operation. Once the anesthesia fails, the twitching of the patient due to pain will seriously affect the progress of the operation and cause medical accidents. The anesthesia depth monitor is a reliable way to realize the objective monitoring method of anesthesia depth. The observation and management of anesthesia depth are one of the main tasks during anesthesia. Currently, clinically, anesthesia is divided into light anesthesia stage, surgical anesthesia, and deep anesthesia. Detecting anesthesia depth by electroencephalogram activity is one of the recent research directions.

[0003] When a common anesthesia depth monitor collects electroencephalogram signals (EEG signals), a disposable non-invasive electroencephalogram sensor is required. During the collection process, in order to obtain high-quality EEG signals, a conductive medium, such as conductive paste or conductive medium, is usually applied between the patient's scalp and the electroencephalogram sensor to achieve the purpose of low impedance and improving the signal quality during collection. However, the conductive medium has the characteristic of being volatile and has relatively high requirements for sealing during storage. If stored improperly, the performance of the conductive medium will decline or even deteriorate. Therefore, during the operation, the EEG signals collected by the anesthesia depth monitor will be unstable or incorrect, and the interference of the signals may cause very serious consequences. Therefore, to ensure the accuracy of the EEG signals collected by the anesthesia depth monitor, the effectiveness of the conductive medium needs to be ensured before use. Summary of the Utility Model

[0004] To solve the technical problems existing in the above-mentioned prior art, the utility model provides a detection circuit and a detection device for detecting the effectiveness of a conductive medium, which are used to detect the effectiveness of the conductive medium for an electroencephalogram sensor to ensure the accuracy and sensitivity of the collected signals.

[0005] In a first aspect, an embodiment of the present application provides a detection circuit for detecting the effectiveness of a conductive medium. The detection circuit includes:

[0006] At least one detection end, which is placed at different positions of the conductive medium to be tested when detecting the effectiveness of the conductive medium to be tested;

[0007] An acquisition module, including an acquisition unit respectively connected to each of the detection ends; the acquisition unit is used to acquire the electrical parameters output by the detection end when the detection end is in contact with the conductive medium to be tested.

[0008] The detection module is connected to the acquisition module; the detection module includes a plurality of comparison units, each comparison unit is configured to obtain the electrical parameters output by the acquisition module, output a comparison result according to the electrical parameters and a preset parameter threshold, and determine and output a detection result for characterizing the effectiveness level of the conductive medium to be measured at the placement position of the detection end; wherein, the number of the comparison units is equal to or greater than the number of preset effectiveness levels of the conductive medium.

[0009] In some embodiments, each detection end includes a first conductive electrode and a second conductive electrode;

[0010] The acquisition unit includes a resistor R11 and a resistor R13; the first end of the resistor R11 is connected to an external input power supply, and the second end of the resistor R11 is connected to the first conductive electrode of its corresponding detection end; the first end of the resistor R13 is connected to the second conductive electrode of its corresponding detection end, and the resistor R13 is connected to a preset voltage terminal.

[0011] In some embodiments, the detection circuit further includes a display module; the display module is connected to the detection module and is configured to obtain the detection result output by the detection module, generate and display display information corresponding to the detection result.

[0012] In some embodiments, the display module includes a display unit corresponding to and connected to each comparison unit; each display unit is configured to obtain the comparison result output by its corresponding comparison unit, and generate and display display information corresponding to the comparison result and characterizing the effectiveness level of the conductive medium to be measured.

[0013] In some embodiments, the detection module includes a first comparison unit, a second comparison unit, a third comparison unit, and a fourth comparison unit. The first comparison result, the second comparison result, the third comparison result, and the fourth comparison result output by the first comparison unit, the second comparison unit, the third comparison unit, and the fourth comparison unit respectively correspond to four levels of excellent, good, medium, and poor effectiveness of the conductive medium to be measured.

[0014] In some embodiments, the first comparison unit includes a series-connected resistor R51, a resistor R52, and a resistor R53, and a first operational amplifier U1; wherein, the first end of the resistor R51 is connected to the first end of the resistor R11, and the second end of the resistor R53 is connected to the second end of the resistor R13; the non-inverting input terminal of the first operational amplifier U1 is connected to the common terminal of the resistor R52 and the resistor R53, the inverting input terminal of the first operational amplifier U1 is connected to the first end of the resistor R13, and the output terminal of the first operational amplifier U1 is configured to output the first comparison result;

[0015] The second comparison unit includes a series connection of a resistor R41, a resistor R42, and a resistor R43, and a second operational amplifier U2. Among them, the first end of the resistor R41 is connected to the first end of the resistor R11, and the second end of the resistor R43 is connected to the second end of the resistor R13. The non-inverting input terminal of the second operational amplifier U2 is connected to the common terminal of the resistor R42 and the resistor R43, the inverting input terminal of the second operational amplifier U2 is connected to the first end of the resistor R13, and the output terminal of the second operational amplifier U2 is used to output a second comparison result.

[0016] The third comparison unit includes a series connection of a resistor R31, a resistor R32, and a resistor R33, and a third operational amplifier U3. Among them, the first end of the resistor R31 is connected to the first end of the resistor R11, and the second end of the resistor R33 is connected to the second end of the resistor R13. The non-inverting input terminal of the third operational amplifier U3 is connected to the common terminal of the resistor R32 and the resistor R33, the inverting input terminal of the third operational amplifier U3 is connected to the first end of the resistor R13, and the output terminal of the third operational amplifier U3 is used to output a third comparison result.

[0017] The fourth comparison unit includes a series connection of a resistor R21, a resistor R22, and a resistor R23, and a fourth operational amplifier U4. Among them, the first end of the resistor R21 is connected to the first end of the resistor R11, and the second end of the resistor R23 is connected to the second end of the resistor R13. The non-inverting input terminal of the fourth operational amplifier U4 is connected to the common terminal of the resistor R22 and the resistor R23, the inverting input terminal of the fourth operational amplifier U4 is connected to the first end of the resistor R13, and the output terminal of the fourth operational amplifier U4 is used to output a fourth comparison result.

[0018] In some embodiments, the display module includes a first display unit, a second display unit, a third display unit, and a fourth display unit respectively connected to the first comparison unit, the second comparison unit, the third comparison unit, and the fourth comparison unit.

[0019] The first display unit includes a series connection of a light-emitting diode D1 and a resistor R61. The first end of the light-emitting diode D1 is connected to the output terminal of the first operational amplifier U1, and the second end of the resistor R61 is connected to the first end of the resistor R11.

[0020] The second display unit includes a series connection of a light-emitting diode D2 and a resistor R62. The first end of the light-emitting diode D2 is connected to the output terminal of the second operational amplifier U2, and the second end of the resistor R62 is connected to the first end of the resistor R11.

[0021] The third display unit includes a light-emitting diode D3 and a resistor R63 connected in series; a first end of the light-emitting diode D3 is connected to an output end of the third operational amplifier U3, and a second end of the resistor R63 is connected to a first end of the resistor R11;

[0022] The fourth display unit includes a light-emitting diode D4 and a resistor R64 connected in series; a first end of the light-emitting diode D4 is connected to an output end of the fourth operational amplifier U4, and a second end of the resistor R64 is connected to a first end of the resistor R11.

[0023] In some embodiments, the detection circuit further includes a filtering module;

[0024] The filtering includes a capacitor C2; a first end of the capacitor C2 is connected to the external input power supply, and a second end of the capacitor C2 is connected to the preset voltage terminal.

[0025] In some embodiments, the detection circuit further includes a USB power supply input interface connected to the external input power supply.

[0026] In a second aspect, an embodiment of the present application provides a detection device for detecting the effectiveness of a conductive medium, and the detection device includes:

[0027] A conductive medium filling groove for placing a conductive medium to be measured; the conductive medium filling groove is provided with a gold-plated electrode;

[0028] The detection circuit for detecting the effectiveness of a conductive medium as described in any of the above embodiments.

[0029] The detection circuit and device for detecting the effectiveness of a conductive medium provided by the embodiment of the present application. The detection circuit includes at least one detection end, a collection module and a detection module. The detection module includes a plurality of comparison units, and the number thereof corresponds to the preset effectiveness level of the conductive medium. When detecting the effectiveness of the conductive medium, the detection end is placed in the conductive medium to be measured. Each comparison unit compares the electrical parameters output by the detection end collected by the collection module with a preset parameter threshold, and determines and outputs a detection result for characterizing the effectiveness level of the conductive medium at the position where the detection end is placed according to the comparison result. The present application can simply, effectively and quickly detect the effectiveness of different positions of the conductive medium, evaluate the conductive medium according to the preset effectiveness level, so as to use, store and discard the conductive medium; at the same time, the circuit structure of the present application is simple and has a high detection accuracy. Description of the Drawings

[0030] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0031] Figure 1 A structural block diagram of a detection circuit for detecting the effectiveness of a conductive medium provided by an embodiment of the present application;

[0032] Figure 2 A structural block diagram of a detection circuit for detecting the effectiveness of a conductive medium provided by another embodiment of the present application;

[0033] Figure 3 A circuit diagram of a detection circuit for detecting the effectiveness of a conductive medium provided by an embodiment of the present application;

[0034] Figure 4 A structural block diagram of a detection device for detecting the effectiveness of a conductive medium provided by an embodiment of the present application.

[0035] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0036] The present utility model will be further described in detail below in conjunction with the accompanying drawings through specific embodiments. Similar elements in different embodiments are labeled with related similar element numbers. In the following embodiments, many detailed descriptions are provided to enable a better understanding of the present application. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification to avoid the core part of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the descriptions in the specification and general technical knowledge in the art.

[0037] In addition, the features, operations, or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in a manner obvious to those skilled in the art. Therefore, the various sequences in the specification and drawings are only for clearly describing a certain embodiment and do not mean that they are necessary sequences unless it is stated that a certain sequence must be followed.

[0038] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects. The character " / " generally means that the objects before and after are in an "or" relationship. And the "connection" and "coupling" mentioned in this application, unless otherwise specified, both include direct and indirect connection (coupling).

[0039] This application intends to use a current transformer to replace the traditional sampling resistor for sampling the transmitted current and / or the transmitted voltage. Based on the electromagnetic induction principle of the current transformer, after the input interface and the output interface are connected to the terminal, the current and / or voltage between the input interface and the output interface is induced to generate corresponding electrical signals, and the electrical signals are output to the control module to achieve direct sampling of the transmitted current and / or the transmitted voltage of the data line in the working state. In the traditional sampling through a sampling resistor, due to the temperature drift phenomenon of the resistance value caused by the ambient temperature or the heat generated by itself, after the change in the sampling accuracy is amplified, the deviation value will be amplified sharply, resulting in a decrease in the sampling accuracy and the inability to accurately monitor the current value or voltage value.

[0040] The technical solution of this application and how the technical solution of this application solves the above technical problems will be described in detail below with specific embodiments. These specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0041] Figure 1 It is a structural block diagram of a detection circuit for detecting the effectiveness of a conductive medium provided by an embodiment of this application. As Figure 1 shown, the detection circuit for detecting the effectiveness of a conductive medium provided by the embodiment of this application includes at least one detection terminal 110, a collection module 120, and a detection module 130.

[0042] In this embodiment, when the detection circuit of this embodiment is used to detect a conductive medium to be measured, at least one detection terminal 110 is placed in the conductive medium to be measured and is in full contact with it. When the volume or surface area of the conductive medium is large, multiple detection terminals 110 can be placed at different positions of the conductive medium to be measured, and the conductivity of different positions can be detected first, which improves the detection efficiency and makes the judgment of the detection result more accurate, avoiding inaccurate detection results when the distribution of the conductive medium is uneven.

[0043] The acquisition module 120 includes at least one acquisition unit 1201. Each acquisition unit 1201 is connected to a detection terminal 110 and is used to acquire the electrical parameters output by the detection terminal 110 when the corresponding detection terminal 110 is placed in the conductive medium and in contact with it, such as the voltage value, current value, and / or impedance value of the conductive medium.

[0044] The detection module 130 is connected to the acquisition module 120 and is used to obtain the electrical parameters output by the detection terminal 110 acquired by the acquisition module 120. The detection module 130 includes multiple comparison units 1301, and the number of comparison units 1301 is equal to or greater than the number of preset conductive medium effectiveness levels. Each comparison unit 1301 compares the acquired electrical parameters with the preset parameter thresholds, outputs the comparison results, and determines and outputs the detection results for characterizing the effectiveness level of the conductive medium to be measured at the position where the detection terminal 110 is placed according to the comparison results.

[0045] It can be understood that in practice, due to the volatile characteristics of the conductive medium, the effectiveness of the conductive medium may be different from that at the time of factory, and at the same time, during the storage process, due to the sealing conditions and environmental conditions, the volatilization rate is also different. Therefore, the effectiveness of the conductive medium can be divided into multiple levels, and each level corresponds to a different conductive range. For example, in the case of the same current, if the voltage value output by the detection terminal 110 is larger, it means that the impedance at the position where the detection terminal 110 is located is larger, that is, it can be considered that the conductivity at this position is worse. On the contrary, the impedance at the position where the detection terminal 110 is located is smaller, that is, it can be considered that the conductivity at this position is better. Therefore, the conductivity of the conductive medium at a certain position can be judged by collecting the electrical parameters at that position. That is, the conductivity of the conductive medium can be divided into multiple levels, the conductive performance range corresponding to each level is clarified, and the electrical parameters of the conductive medium are inferred backward, so as to achieve the purpose of judging the effectiveness level of the conductive medium by collecting the electrical parameters output by the detection terminal 110 through the acquisition module 120.

[0046] When using the detection circuit according to the embodiments of the present application to detect the effectiveness of a conductive medium, first place the detection terminal 110 in the conductive medium to be measured to ensure contact with the detection terminal 110. Then, the acquisition module 120 is used to collect the electrical parameters output by the detection terminal 110. Finally, there is a comparison unit 1301 with preset different-level parameters, which sequentially or simultaneously compares the obtained electrical parameters with the preset parameter threshold to obtain a comparison result. According to the comparison result, the effectiveness level of the corresponding conductive medium to be measured can be determined, and the final detection result can be obtained.

[0047] In summary, the detection circuit for detecting the effectiveness of a conductive medium provided by the embodiments of the present application includes at least one detection terminal, an acquisition module, and a detection module. The detection module includes a plurality of comparison units, and the number thereof corresponds to the preset effectiveness levels of the conductive medium. When detecting the effectiveness of the conductive medium, the detection terminal is placed in the conductive medium to be measured. Each comparison unit obtains the electrical parameters output by the detection terminal collected by the acquisition module, compares it with the preset parameter threshold, and determines and outputs a detection result for characterizing the effectiveness level of the conductive medium to be measured at the placement position of the detection terminal according to the comparison result. The present application can simply, effectively, and quickly detect the effectiveness of different positions of the conductive medium, evaluate the conductive medium according to the preset effectiveness levels, so as to facilitate the use, storage, and disposal of the conductive medium. At the same time, the circuit structure of the present application is simple and has a high detection accuracy.

[0048] Figure 2 This is the structural block diagram of the detection circuit for detecting the effectiveness of a conductive medium provided by another embodiment of the present application. As Figure 2 shown, on the basis of the above embodiments, the detection circuit provided by the embodiments of the present application further includes a display module 140 and a USB power supply input interface 150.

[0049] In this embodiment, the display module 140 is connected to the detection module 130, and is used to obtain the detection result output by the detection module 130, generate and display the display information corresponding to the detection result.

[0050] In some embodiments, the display module 140 can display the detection result according to a preset display form, such as any one of text, light, and sound.

[0051] In some embodiments, the display module 140 may include a plurality of display units 1401. Each display unit 1401 is connected to a comparison unit 1301. Each display unit 1401 is used to obtain the comparison result output by the corresponding comparison unit 1301 connected thereto, and generate and display the display information characterizing the effectiveness level of the conductive medium to be measured corresponding to the comparison result according to the comparison result.

[0052] It can be understood that in this embodiment, the display unit 1401 of the display module 140 displays the detection result corresponding to the detection result of the conductive medium to be detected after different comparison units 1301 compare and judge the level of the conductive medium to be detected, so that the detection result can be seen more intuitively.

[0053] In some embodiments, each module of the detection circuit can be powered by an external input power supply. At this time, for the convenience of detection, a USB power supply input interface 150 can be connected to the external input power supply to supply power to each module in the circuit.

[0054] In some embodiments, the detection circuit includes a rechargeable power module for power supply. The rechargeable power module can be charged through the USB power supply input interface 150 to realize the mobile detection of the effectiveness of the conductive medium.

[0055] Figure 3 The figure is a circuit diagram of a detection circuit for detecting the effectiveness of a conductive medium provided by an embodiment of the present application. As Figure 3 shown, the detection circuit provided by the embodiment of the present application includes a detection end 110, and the detection end 110 includes a first conductive electrode and a second conductive electrode.

[0056] Correspondingly, the acquisition unit 1201 includes a resistor R11 and a resistor R13. Among them. The first end of the resistor R11 is connected to the positive pole of the power module, and the second end of the resistor R11 is connected to the first conductive electrode of its corresponding detection end 110; the first end of the resistor R13 is connected to the second conductive electrode of its corresponding detection end 110, and the resistor R13 is connected to the negative pole of the power module.

[0057] In this embodiment, the detection module 130 includes a first comparison unit, a second comparison unit, a third comparison unit, and a fourth comparison unit. The first comparison result, the second comparison result, the third comparison result, and the fourth comparison result output by the first comparison unit, the second comparison unit, the third comparison unit, and the fourth comparison unit respectively correspond to four levels representing excellent, good, medium, and poor effectiveness of the conductive medium to be detected.

[0058] Specifically, the first comparison unit includes a series-connected resistor R51, a resistor R52, and a resistor R53, and a first operational amplifier U1; among them, the first end of the resistor R51 is connected to the first end of the resistor R11, and the second end of the resistor R53 is connected to the second end of the resistor R13; the non-inverting input terminal of the first operational amplifier U1 is connected to the common terminal of the resistor R52 and the resistor R53, the inverting input terminal of the first operational amplifier U1 is connected to the first end of the resistor R13, and the output terminal of the first operational amplifier U1 is used to output the first comparison result.

[0059] The second comparison unit includes a series-connected resistor R41, resistor R42, and resistor R43, and a second operational amplifier U2. Among them, the first end of resistor R41 is connected to the first end of resistor R11, and the second end of resistor R43 is connected to the second end of resistor R13. The non-inverting input terminal of the second operational amplifier U2 is connected to the common terminal of resistor R42 and resistor R43, the inverting input terminal of the second operational amplifier U2 is connected to the first end of resistor R13, and the output terminal of the second operational amplifier U2 is used to output a second comparison result.

[0060] The third comparison unit includes a series-connected resistor R31, resistor R32, and resistor R33, and a third operational amplifier U3. Among them, the first end of resistor R31 is connected to the first end of resistor R11, and the second end of resistor R33 is connected to the second end of resistor R13. The non-inverting input terminal of the third operational amplifier U3 is connected to the common terminal of resistor R32 and resistor R33, the inverting input terminal of the third operational amplifier U3 is connected to the first end of resistor R13, and the output terminal of the third operational amplifier U3 is used to output a third comparison result.

[0061] The fourth comparison unit includes a series-connected resistor R21, resistor R22, and resistor R23, and a fourth operational amplifier U4. Among them, the first end of resistor R21 is connected to the first end of resistor R11, and the second end of resistor R23 is connected to the second end of resistor R13. The non-inverting input terminal of the fourth operational amplifier U4 is connected to the common terminal of resistor R22 and resistor R23, the inverting input terminal of the fourth operational amplifier U4 is connected to the first end of resistor R13, and the output terminal of the fourth operational amplifier U4 is used to output a fourth comparison result.

[0062] The resistors Rn1 and Rn3 (n = 2, 3, 4, 5) in each comparison unit and the resistors R11 and R21 respectively form a Wheatstone bridge to form a differential input, which can effectively improve the anti-interference ability during the detection process.

[0063] In some embodiments, the resistances of resistor R11, resistor R21, resistor R31, resistor R41, and resistor R51 are equal; and / or the resistances of resistor R13, resistor R23, resistor R33, resistor R43, and resistor R53 are equal to satisfy the balance condition of the Wheatstone bridge.

[0064] In this embodiment, the display module 140 includes a first display unit, a second display unit, a third display unit, and a fourth display unit that are respectively connected to the first comparison unit, the second comparison unit, the third comparison unit, and the fourth comparison unit.

[0065] Specifically, the first display unit includes a light-emitting diode D1 and a resistor R61 connected in series; the first end of the light-emitting diode D1 is connected to the output end of the first operational amplifier U1, and the second end of the resistor R61 is connected to the first end of the resistor R11.

[0066] The second display unit includes a light-emitting diode D2 and a resistor R62 connected in series; the first end of the light-emitting diode D2 is connected to the output end of the second operational amplifier U2, and the second end of the resistor R62 is connected to the first end of the resistor R11.

[0067] The third display unit includes a light-emitting diode D3 and a resistor R63 connected in series; the first end of the light-emitting diode D3 is connected to the output end of the third operational amplifier U3, and the second end of the resistor R63 is connected to the first end of the resistor R11.

[0068] The fourth display unit includes a light-emitting diode D4 and a resistor R64 connected in series; the first end of the light-emitting diode D4 is connected to the output end of the fourth operational amplifier U4, and the second end of the resistor R64 is connected to the first end of the resistor R11.

[0069] In some embodiments, the light-emitting diode D1 is a green LED, the light-emitting diode D2 is a blue LED, the light-emitting diode D3 is a yellow LED, and the light-emitting diode D4 is a red LED. Correspondingly, when the first comparison unit of the detection module 130 determines that the effectiveness level of the conductive medium to be detected is excellent, the corresponding light of the display module 140 is green; similarly, when it is determined that the effectiveness level of the conductive medium to be detected is good, medium, and poor, the corresponding lights of the display module 140 are blue, yellow, and red respectively.

[0070] In some embodiments, the detection circuit further includes a filtering module 160. Specifically, the filtering includes a capacitor C2; the first end of the capacitor C2 is connected to an external input power supply through the USB power supply input interface 150, and the second end of the capacitor C2 is connected to a preset voltage terminal.

[0071] Figure 4 This is a structural block diagram of a detection device for detecting the effectiveness of a conductive medium provided by an embodiment of the present application. As Figure 4 shown, the detection device for detecting the effectiveness of a conductive medium provided by the embodiment of the present application includes a conductive medium filling groove 410 for placing the conductive medium to be measured and the detection circuit 420 for detecting the effectiveness of the conductive medium described in any of the above embodiments.

[0072] In this embodiment, the conductive medium filling groove 410 has a length of 10 mm, a width of 10 mm, and a thickness of 1 mm, can accommodate 100 microliters of conductive medium, and the conductive medium filling groove is provided with a gold-plated electrode.

[0073] When using the detection device provided by the embodiments of the present application to detect the effectiveness of the conductive medium, first disconnect the connection between the USB power supply input interface and the external input power supply. Place about 100 microliters of the conductive medium in the conductive medium filling groove 410, and clean up the conductive medium overflowing from the edge. Then connect the USB power supply input interface to the external input power supply. Place the two electrodes at the detection end in the conductive medium filling groove 410 to make full contact with the conductive medium. By collecting the impedance value of the conductive medium between the two electrodes, and making a detection and judgment based on the impedance value, a detection result corresponding to the effectiveness level of the conductive medium to be measured at the placement position of the detection end is obtained. After the detection is completed, disconnect the connection between the USB power supply input interface and the external input power supply, mark the level of the conductive medium to be measured, and use it within a short time to prevent the effective level from decreasing, or mark it and store it in an environment with excellent sealing conditions. Finally, clean up the conductive medium in the conductive medium filling groove 410 to extend the service life and detection accuracy of the detection device.

[0074] In summary, before the anesthetic depth monitor collects the electroencephalogram signal (EEG signal), first use the detection device provided by the embodiments of the present application for detecting the effectiveness of the conductive medium to detect the effectiveness of the conductive medium used for the electroencephalogram sensor, so as to ensure the effectiveness of the conductive medium used and ensure the accuracy and sensitivity of the signal collected by the anesthetic depth monitor.

[0075] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art, without departing from the purpose of the present application and the scope protected by the claims, can make several simple deductions, deformations or substitutions according to the idea of the present application, and all belong to the protection scope of the present application.

Claims

1. A detection circuit for detecting the effectiveness of a conductive medium, characterized in that: include: At least one detection terminal is placed at different positions of the conductive medium to be tested when testing the effectiveness of the conductive medium; A collection module, comprising a collection unit connected to each of the detection ends respectively; The acquisition unit is used to collect the electrical parameters output by the detection end when the detection end is in contact with the conductive medium to be detected; A detection module is connected to the acquisition module; the detection module includes a plurality of comparison units, each of which is used to obtain the electrical parameters output by the acquisition module, output a comparison result according to the electrical parameters and a preset parameter threshold, and determine and output a detection result for characterizing the effectiveness level of the conductive medium to be tested at the placement position of the detection end according to the comparison result; wherein the number of the comparison units is equal to or greater than the number of preset conductive medium effectiveness levels.

2. The detection circuit for detecting the effectiveness of a conductive medium according to claim 1, characterized in that: Each of the detection ends includes a first conductive electrode and a second conductive electrode; The acquisition unit includes a resistor R11 and a resistor R13; the first end of the resistor R11 is connected to an external input power supply, and the second end of the resistor R11 is connected to the first conductive electrode of the corresponding detection end; the first end of the resistor R13 is connected to the second conductive electrode of the corresponding detection end, and the resistor R13 is connected to the preset voltage end.

3. The detection circuit for detecting the effectiveness of a conductive medium according to claim 1, characterized in that: It also includes a display module; the display module is connected to the detection module and is used to obtain the detection result output by the detection module, and generate and display display information corresponding to the detection result.

4. The detection circuit for detecting the effectiveness of a conductive medium according to claim 3, characterized in that: The display module includes a display unit corresponding to each of the comparison units and connected thereto; each display unit is used to obtain a comparison result output by the comparison unit corresponding thereto, and based on the comparison result, generate and display display information corresponding to the comparison result representing the effectiveness level of the conductive medium to be tested.

5. The detection circuit for detecting the effectiveness of a conductive medium according to claim 3, characterized in that: The detection module includes a first comparison unit, a second comparison unit, a third comparison unit and a fourth comparison unit. The first comparison result, the second comparison result, the third comparison result and the fourth comparison result output by the first comparison unit, the second comparison unit, the third comparison unit and the fourth comparison unit respectively correspond to four levels of excellent, good, medium and poor effectiveness of the conductive medium to be tested.

6. The detection circuit for detecting the effectiveness of a conductive medium according to claim 5, characterized in that: The first comparison unit includes a resistor R51, a resistor R52 and a resistor R53 connected in series, and a first operational amplifier U1; wherein the first end of the resistor R51 is connected to the first end of the resistor R11, and the second end of the resistor R53 is connected to the second end of the resistor R13; the non-inverting input end of the first operational amplifier U1 is connected to the common end of the resistor R52 and the resistor R53, the inverting input end of the first operational amplifier U1 is connected to the first end of the resistor R13, and the output end of the first operational amplifier U1 is used to output a first comparison result; The second comparison unit includes a resistor R41, a resistor R42 and a resistor R43 connected in series, and a second operational amplifier U2; wherein the first end of the resistor R41 is connected to the first end of the resistor R11, and the second end of the resistor R43 is connected to the second end of the resistor R13; the non-inverting input end of the second operational amplifier U2 is connected to the common end of the resistor R42 and the resistor R43, the inverting input end of the second operational amplifier U2 is connected to the first end of the resistor R13, and the output end of the second operational amplifier U2 is used to output a second comparison result; The third comparison unit includes a resistor R31, a resistor R32 and a resistor R33 connected in series, and a third operational amplifier U3; wherein the first end of the resistor R31 is connected to the first end of the resistor R11, and the second end of the resistor R33 is connected to the second end of the resistor R13; the non-inverting input end of the third operational amplifier U3 is connected to the common end of the resistor R32 and the resistor R33, the inverting input end of the third operational amplifier U3 is connected to the first end of the resistor R13, and the output end of the third operational amplifier U3 is used to output a third comparison result; The fourth comparison unit includes a resistor R21, a resistor R22 and a resistor R23 connected in series, and a fourth operational amplifier U4; wherein the first end of the resistor R21 is connected to the first end of the resistor R11, and the second end of the resistor R23 is connected to the second end of the resistor R13; the non-inverting input end of the fourth operational amplifier U4 is connected to the common end of the resistor R22 and the resistor R23, the inverting input end of the fourth operational amplifier U4 is connected to the first end of the resistor R13, and the output end of the fourth operational amplifier U4 is used to output a fourth comparison result.

7. The detection circuit for detecting the effectiveness of a conductive medium according to claim 6, characterized in that: The display module includes a first display unit, a second display unit, a third display unit and a fourth display unit connected to the first comparison unit, the second comparison unit, the third comparison unit and the fourth comparison unit respectively; The first display unit includes a light emitting diode D1 and a resistor R61 connected in series; a first end of the light emitting diode D1 is connected to the output end of the first operational amplifier U1, and a second end of the resistor R61 is connected to a first end of the resistor R11; The second display unit includes a light emitting diode D2 and a resistor R62 connected in series; a first end of the light emitting diode D2 is connected to the output end of the second operational amplifier U2, and a second end of the resistor R62 is connected to a first end of the resistor R11; The third display unit includes a light emitting diode D3 and a resistor R63 connected in series; a first end of the light emitting diode D3 is connected to the output end of the third operational amplifier U3, and a second end of the resistor R63 is connected to a first end of the resistor R11; The fourth display unit includes a light emitting diode D4 and a resistor R64 connected in series; a first end of the light emitting diode D4 is connected to the output end of the fourth operational amplifier U4, and a second end of the resistor R64 is connected to a first end of the resistor R11.

8. The detection circuit for detecting the effectiveness of a conductive medium according to claim 2, characterized in that: Also includes a filtering module; The filter includes a capacitor C2; a first end of the capacitor C2 is connected to the external input power supply, and a second end of the capacitor C2 is connected to the preset voltage end.

9. The detection circuit for detecting the effectiveness of a conductive medium according to claim 2, characterized in that: It also includes a USB power supply input interface connected to the external input power source.

10. A detection device for detecting the effectiveness of a conductive medium, characterized in that: include: Conductive medium filling slot, used for placing the conductive medium to be tested; The conductive medium filling groove is provided with a gold-plated electrode; A detection circuit for detecting the effectiveness of a conductive medium as described in any one of claims 1 to 9.

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