Multi-channel monitoring system, parameter measurement module, monitor and blood oxygen monitoring system

Abstract

The application discloses a multi-channel monitoring system, which comprises an MCU, a DAC sharing circuit, an ADC sharing circuit, a multi-array switch and at least two sensor probes. The at least two sensor probes are used for collecting physical data of a person to be measured. The MCU controls the DAC sharing circuit to drive monitoring of a single sensor probe and controls the ADC sharing circuit to receive monitoring results of the single sensor probe at the same time. The MCU is also internally provided with a logic control time sequence, so that the multi-array switch is sequentially turned on to monitor one of the at least two sensor probes, and the DAC sharing circuit and the ADC sharing circuit also act on one sensor probe each time under the guidance of the multi-array switch. The multi-channel monitoring system can simultaneously cope with monitoring work of multiple sensor probes, and can provide more accurate monitoring results and guarantee effectiveness of physical data in the case of complex application scenarios and monitoring requirements.

Description

Technical Field

[0001] The present application relates to the field of medical equipment, and in particular to a multi-channel monitoring system, a parameter measurement module, a monitor, and a blood oxygen monitoring system. Background Art

[0002] Vital sign data, such as blood oxygen, electrocardiogram, and blood pressure, has been widely used in clinical medicine. It not only provides a direct reflection of the subject's physical condition, but also allows for the generation of a wealth of derived data through monitoring technology, assisting clinicians in making informed decisions for specific scenarios.

[0003] Taking blood oxygen levels as an example, derived data include the Perfusion Index (PI), Critical Congenital Heart Disease (CCHD) screening, the Pleth Variability Index (PVI), and the CPR Quality Index (CQI). The PI reflects the state of peripheral blood circulation. A low PI indicates poor peripheral blood circulation, prompting doctors / nurses to take further treatment measures. CCHD screening sequentially measures the blood oxygen saturation of the ipsilateral hand and foot of the newborn. Based on the absolute values ​​and the difference in absolute values ​​of the blood oxygen saturation in the hand and foot, the possibility of congenital heart disease in the newborn is determined according to screening criteria. The PVI reflects the patient's fluid responsiveness; for example, an elevated PVI indicates possible blood volume depletion. The CQI reflects the actual effect of mechanical compression on the body during CPR. A CQI >60 indicates that artificial blood circulation is well established and the patient has a chance of recovering spontaneous circulation.

[0004] However, pulse oximeters currently available on the market are all based on single-channel measurement, using only a single blood oxygen sensor to analyze blood oxygen and derived parameters. However, clinical applications face a variety of complex scenarios, which compromises the effectiveness of single-channel measurement, reduces clinical usability, and even affects measurement accuracy. Some multi-channel monitors on the market utilize multiple modules in conjunction with each other, placing high demands on the device, requiring multiple slots. If data collaboration between modules is required, such as identifying congenital heart disease, simultaneous analysis of limb blood pressure data, or coordinated decision-making between central and peripheral circulation, additional data communication tools and even additional analysis hardware are required between the modules. The greater the number of modules involved, the higher the cost of information integration, the higher the cost, and the exponentially increasing risk of accidents. Summary of the Invention

[0005] This application proposes a multi-channel monitoring system with a simple structure that can effectively cope with a variety of complex scenarios. Specifically, it includes the following technical solutions:

[0006] A multi-channel monitoring system comprising:

[0007] MCU, used to control the operation of the entire machine, the MCU has built-in logic control timing;

[0008] at least two sensor probes, each sensor probe being used to collect vital sign data of a subject;

[0009] A DAC sharing circuit, one end of which is connected to the MCU and is used to drive a single sensor probe for monitoring;

[0010] An ADC sharing circuit, one end of which is connected to the MCU and is used to receive monitoring results of a single sensor probe;

[0011] a multi-array switch, wherein one end of the multi-array switch is used to connect the DAC sharing circuit and the ADC sharing circuit respectively, and the other end of the multi-array switch is used to connect to the at least two sensor probes;

[0012] The MCU controls the multi-array switch through the logic control timing to sequentially turn on one of the at least two sensor probes for monitoring.

[0013] The multi-switch array includes a first multi-way single-throw switch and a second multi-way single-throw switch.

[0014] One end of the first multi-way single-throw switch is connected to the DAC shared circuit, and the other end is connected to the at least two sensor probes;

[0015] One end of the second multi-way single-throw switch is connected to the ADC shared circuit, and the other end is connected to the at least two sensor probes.

[0016] Wherein, the sensor probe includes a cathode and an anode, and when the multi-array switch is connected to the cathode of each of the sensor probes, the anode of each of the sensor probes is connected to the power supply in a common line;

[0017] When the multi-array switch is connected to the anode of each sensor probe, the cathode of each sensor probe is collinearly connected to the ground.

[0018] The multi-array switch includes a multi-way double-throw switch, one end of which is connected to the DAC sharing circuit and the ADC sharing circuit respectively, and the other end of which is connected to the at least two sensor probes.

[0019] The DAC shared circuit includes a digital-to-analog conversion circuit and a driving circuit, and the ADC shared circuit includes an analog-to-digital conversion circuit and a receiving circuit.

[0020] The sensor probe includes at least one of a blood oxygen probe, a blood pressure probe, and an electrocardiogram probe.

[0021] The sensor probe is a blood oxygen sensor, which includes a light-emitting device and a photosensitive device.

[0022] Among them, the logic control timing includes multiple time periods within one cycle, the number of the multiple time periods is the same as the number of the at least two sensor probes, the duration of each of the multiple time periods is the same, and the MCU controls one sensor probe for monitoring within one time period.

[0023] The blood oxygen sensor includes a red light source and an infrared light source. In one time period, the DAC sharing circuit drives the red light source and the infrared light source to emit light in sequence.

[0024] Among them, the multi-channel monitoring system also includes a signal modulation module and a preprocessing module. The signal modulation module is used to mediate the multiple vital sign data collected by the MCU into a timing signal corresponding to each of the sensor probes, and the preprocessing module mediates the timing signal into a multi-channel signal.

[0025] The multi-channel monitoring system further includes a joint analysis application module, and the joint analysis application module is used to perform physiological characteristic analysis on a combination of two or more channel signals in the multi-channel signals.

[0026] The multi-channel monitoring system further includes an algorithm module, and the algorithm module is used to analyze each channel signal in the multi-channel signals.

[0027] The multi-channel monitoring system further includes a joint analysis application module, which is used to perform physiological characteristic analysis on a combination of two or more analysis results in the multi-channel signal analysis results of the algorithm module.

[0028] The present application relates to a parameter measurement module, and the monitoring module includes the above-mentioned multi-channel monitoring system.

[0029] The present application also relates to a monitor, which includes the above-mentioned multi-channel monitoring system.

[0030] The present application also relates to a blood oxygen monitoring system, comprising a first monitoring circuit and a second monitoring circuit.

[0031] The first monitoring circuit includes a first MCU and a first sensor probe, and the first MCU and the first sensor probe further include a first digital-to-analog conversion circuit and a first driving circuit connected therebetween, as well as a first analog-to-digital conversion circuit and a first receiving circuit connected therebetween;

[0032] The second monitoring circuit includes a second MCU and a second sensor probe. A second digital-to-analog conversion circuit and a second driving circuit are connected between the second MCU and the second sensor probe, as well as a second analog-to-digital conversion circuit and a second receiving circuit are connected.

[0033] The multi-channel monitoring system described in the present application controls the operation of the entire machine through an MCU. The MCU drives a single sensor probe for monitoring by controlling the DAC shared circuit, and also receives the monitoring results of a single sensor probe through the ADC shared circuit. The multi-channel monitoring system of the present application also collects the vital signs data of the subject through at least two sensor probes. One end of the multi-array switch is used to connect the DAC shared circuit and the ADC shared circuit respectively, and the other end is used to connect to the at least two sensor probes. The MCU controls the multi-array switch through the built-in logic control timing to turn on one of the at least two sensor probes in turn for monitoring. When multiple sensor probes are set to monitor the vital signs data of the subject, the multi-channel monitoring system of the present application can turn on and receive the monitoring data of each sensor probe in turn through the multi-array switch in conjunction with the logic control timing. Even in the face of complex application scenarios, the monitoring data of multiple sensor probes can be obtained within the same time period, thereby improving the monitoring accuracy and saving monitoring time.

[0034] The monitoring module and monitor using the above-mentioned multi-channel monitoring system also improve monitoring efficiency and obtain more accurate monitoring results. The derived data can also more accurately reflect the physical condition of the subject. Including the above-mentioned multi-channel monitoring system. The blood oxygen monitoring system involved in this application monitors the vital signs data of the subject through the first monitoring circuit and the second monitoring circuit respectively, and also obtains higher monitoring accuracy and saves monitoring time. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of a multi-channel monitoring system in one embodiment;

[0036] Figure 2 is a timing diagram of a multi-channel monitoring system in one embodiment;

[0037] Figure 3 is a schematic diagram of a multi-channel monitoring system using multiple single-throw switches in one embodiment;

[0038] Figure 4 is a logic matrix control diagram of a logic control timing in one embodiment;

[0039] Figure 5 is a schematic diagram of a multi-channel monitoring system using multiple single-throw switches in one embodiment;

[0040] Figure 6 is a schematic diagram of a multi-channel monitoring system using multiple single-throw switches in one embodiment;

[0041] Figure 7 is a schematic diagram of a multi-channel monitoring system using a multi-way double-throw switch in one embodiment;

[0042] Figure 8 is a schematic diagram of a DAC sharing circuit in one embodiment;

[0043] Figure 9 is a schematic diagram of an ADC sharing circuit in one embodiment;

[0044] Figure 10 is a schematic diagram of a blood oxygen sensor in one embodiment;

[0045] Figure 11 yes Figure 10 A logic control timing diagram of the blood oxygen sensor shown;

[0046] Figure 12 yes Figure 10 A timing diagram of the blood oxygen sensor shown;

[0047] Figure 12a yes Figure 10 A timing diagram of the blood oxygen sensor shown;

[0048] Figure 13 is a schematic diagram of a multi-channel monitoring system in one embodiment;

[0049] Figure 14 is a schematic diagram of a multi-channel monitoring system in one embodiment;

[0050] Figure 15 is a schematic diagram of a parameter measurement module in one embodiment;

[0051] Figure 16 is a schematic diagram of a monitor in one embodiment;

[0052] Figure 17 is a schematic diagram of a blood oxygen monitoring system in one embodiment. DETAILED DESCRIPTION

[0053] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0054] See also Figure 1 The multi-channel monitoring system 100 shown includes an MCU 10, at least two sensor probes 20, a DAC sharing circuit 30, an ADC sharing circuit 40, and a multi-array switch 50. The MCU 10 is connected to the DAC sharing circuit 30, the ADC sharing circuit 40, and the multi-array switch 50. One end of the multi-array switch 50 is connected to the DAC sharing circuit 20 and the ADC sharing circuit 30, while the other end of the multi-array switch 50 is used to connect to the at least two sensor probes 20. The MCU 10, such as a single-chip microcomputer or an ARM chip, is used to control the operation of the entire system. The at least two sensor probes 20 are used to collect vital sign data of the subject. Specifically, the at least two sensor probes 20 include a first probe 21 and a second probe 22, each of which is used to collect vital sign data of the subject. The other end of the multi-array switch 50 is used to connect to the first probe 21 and the second probe 22, respectively. The collection operations of the first probe 21 and the second probe 22 are controlled by the MCU 10. Taking the first probe 21 as an example, the MCU 10 drives the first probe 21 to start working through the DAC shared circuit and the multi-array switch 50. The MCU 10 also converts the analog signal collected by the first probe 21 into a digital signal through the ADC shared circuit and the multi-array switch 50, thereby receiving the collected data of the first probe 21.

[0055] The multi-array switch 50 is connected to the first probe 21 and the second probe 22 at the same time, but the multi-array switch 50 only conducts one sensor probe in a fixed time period to achieve data collection and data transmission of the sensor probe 20. The MCU 10 has a built-in logic control timing, which is used to control the conduction timing and conduction period of the multi-array switch 50 and at least two sensor probes 20. For sensor probes of the same type, their conduction timing and conduction period need to be set to the same value to ensure relative balance of characteristic data. Please refer to Figure 2Assuming that each cycle of the logic control sequence is T = 400ms, and when the first and second probes 21, 22 are of the same type, the trigger frequency of the first and second probes 21, 22 is also maintained at 400ms. Under the control of the MCU 10, the actual duration of the gating execution of the two sensor probes 20 is 200ms. Specifically, during the first time period t1 of the cycle T, the MCU 10 controls the multi-array switch 50 to turn on the first probe 21, and the first probe 21 operates for 200ms. During this first time period t1, the MCU 10 controls the DAC shared circuit to activate the first probe 21. The MCU 10 also converts the analog signal collected by the first probe 21 into a digital signal via the ADC shared circuit, enabling the reception of the collected data from the first probe 21. During the second time period t2 of the cycle T, the MCU 10 controls the multi-array switch 50 to turn on the second probe 22 through the logic control sequence, and the second probe 22 also operates for 200ms. Thus, by controlling the multi-array switch 50 through the logic control timing built into the MCU 10, the multi-array switch 50 sequentially turns on the sensor probes 20 within at least two sensor probes 20, allowing the DAC sharing circuit 30 and the ADC sharing circuit 40 to drive and receive data from different sensor probes at different time periods within the cycle T. In the case of multiple sensor probes 20, each sensor probe 20 can operate effectively, and the multiple sensor probes 20 share a driving circuit and a receiving circuit, simplifying the circuitry of the multi-channel monitoring system 100 of the present application and enabling the simultaneous collection of multiple vital sign parameters or vital sign parameters of multiple parts. This allows the multi-channel monitoring system 100 of the present application to simultaneously collect multiple vital sign data in the same environmental scenario, with the collected vital sign data having a higher degree of correlation, thereby improving the accuracy and reliability of the vital sign data.

[0056] It should be noted that the first probe 21 and the second probe 22 can be sensor probes 20 that collect the same type of vital sign data. For example, the first probe 21 and the second probe 22 can be one of a blood oxygen sensor, a blood pressure sensor, and an electrocardiogram sensor, thereby performing dual blood oxygen measurement, dual blood pressure measurement, or dual electrocardiogram measurement on the subject. The sensor brand and model of the first probe 21 and the second probe 22 can also be set to be the same, thereby eliminating vital sign data collection errors caused by different parameters. The sensor probes of the first probe 21 and the second probe 22 can also be sensor probes 20 that collect different types of vital sign data, that is, the first probe 21 and the second probe 22 are each one of a blood oxygen sensor, a blood pressure sensor, and an electrocardiogram sensor, and the first probe 21 and the second probe 22 are different types of sensors. For this type of embodiment, the multi-channel monitoring system 100 can complete the collection of multiple types of vital sign data for the subject at the same time, thereby improving the monitoring efficiency of the multi-channel monitoring system 100. It is understood that, given the time-segmented monitoring characteristics of the multi-channel monitoring system 100 of the present application, two or more pairs of sensor probes 20 can be provided. By using logic control timing instructions in conjunction with the sequential conduction function of the multi-array switch 50, multiple sets of different types of dual-channel vital sign data can be collected simultaneously from the subject. Because the sensor probes 20 also collect vital sign data at periodic intervals, the multi-channel monitoring system 100 can collect multiple sets of dual-channel vital sign data with the appropriate configuration of the logic control timing.

[0057] An embodiment see Figure 3 The multi-array switch 50 includes a first multi-way single-throw switch 51 and a second multi-way single-throw switch 52. One end of the first multi-way single-throw switch 51 is connected to the DAC sharing circuit 30, and the other end of the first multi-way single-throw switch 51 is connected to at least two sensor probes 20; one end of the second multi-way single-throw switch 52 is connected to the ADC sharing circuit 40, and the other end is connected to at least two sensor probes 20. Figure 3 In the embodiment, the at least two sensor probes 20 include N sensor probes 20, where N is greater than or equal to 2. A first multi-way single-throw switch 51 and a second multi-way single-throw switch 52 are respectively connected to the N sensor probes 20. The first multi-way single-throw switch 51 is electrically connected to the DAC sharing circuit 30 to drive one of the N sensor probes 20 to initiate monitoring. The second multi-way single-throw switch 52 is electrically connected to the ADC sharing circuit 40 to receive vital sign data monitored by one of the N sensor probes 20.

[0058] It is understandable that in this embodiment, the first multi-way single-throw switch 51 and the second multi-way single-throw switch 52 need to be connected to the same sensor probe 20 at the same time. Therefore, the logic control timing needs to control the first multi-way single-throw switch 51 and the second multi-way single-throw switch 52 to work in coordination. Figure 4 , the first multi-way single-throw switch 51 is an N×1 vector matrix, and the second multi-way single-throw switch 52 is a 1×N vector matrix, where 1, 2, 3, ... N-1, N, respectively correspond to the logical functions of each sub-switch connected to the N sensor probes 20 in the two multi-way single-throw switches, and their value range is [0, 1]. It can be understood that logic 0 represents that the sub-switch is closed, and logic 1 represents that the sub-switch is open. Figure 4 The logic matrix control diagram shown in the figure shows that only when the row and column selection numbers are the same and both select logic 1, the corresponding selected sensor probe 20 can be turned on and work normally. For example, if row 2 and column 2 are selected, there will be a logic matrix [(0,0)(0,1)(1,0)(1,1)] as shown in the figure. When the (1,1) combination is selected, Figure 3 Only the second probe 22 in the sensor probe sequence shown in FIG can work normally and transmit monitoring data back.

[0059] In one embodiment, some types of sensor probes 20 include a cathode 201 and an anode 202. When the first multi-way single-throw switch 51 and the second multi-way single-throw switch 52 are connected to each sensor probe 20, they may be uniformly connected to the cathode 201 (see FIG. Figure 5 ). At this time, the anodes 202 of the sensor probes 20 need to be collinear. After the anodes 202 of multiple sensor probes 20 are collinear, they are connected to the DAC collinear circuit 30, and the ends of the collinear circuit need to be connected to the power supply 101 of the multi-channel monitoring system 100; when the first multi-way single-throw switch 51 and the second multi-way single-throw switch 52 are uniformly connected to the anodes 202 of each sensor probe 20 (see Figure 6 ), the cathodes 201 of the sensor probes 20 need to be collinear, and the ends of the collinear cathodes 201 of the multiple sensor probes 20 need to be connected to the ground line 102 of the multi-channel monitoring system 100. The arrangement of multiple sensor probes 20 with a common anode or cathode ensures that the noise floor (i.e., dark current) of each sensor probe 20 in the multi-channel multi-channel monitoring system 100 is consistent, thereby improving the homology between the signals detected by each sensor probe 20. This reduces the variability caused by hardware noise and facilitates the coordinated analysis and processing of signals across multiple channels.

[0060] For another example, see Figure 7. The multi-array switch 50 includes a multi-way double-throw switch 53. One end of the multi-way double-throw switch 53 is connected to the DAC sharing circuit 30 and the ADC sharing circuit 40 respectively, and the other end of the multi-way double-throw switch 53 is connected to at least two sensor probes 20. It can be understood that because the multi-way double-throw switch 53 can connect the DAC sharing circuit 30 and the ADC sharing circuit 40 respectively, and can also turn on each sensor probe 20 in sequence, it further simplifies the circuit structure of the multi-channel monitoring system 100 of the present application and reduces costs. The MCU 10 also controls the switching of the multi-way double-throw switch 53 between different sensor probes 20 through logic control timing to ensure that the DAC sharing circuit 30 and the ADC sharing circuit 40 act on the same sensor probe 20 at the same time. For a single sensor probe 20, it only needs to be connected to one multi-way double-throw switch 53, without having to connect the first multi-way single-throw switch 51 and the second multi-way single-throw switch 52 respectively, and at the same time simplifies the assembly process.

[0061] The sensor probe 20 includes an input terminal 211 and an output terminal 221. The input signal driving the sensor probe 20 and the output signal of the sensor probe 20 are mostly in the form of analog signals. Figure 8 The DAC sharing circuit 30 includes a digital-to-analog conversion circuit 31 and a driver circuit 32. The driver circuit 32 is connected to the MCU 10 via the digital-to-analog conversion circuit 31. The digital-to-analog conversion circuit 31 converts the digital signal output by the MCU 10 into an analog signal and outputs it to the driver circuit 32. The driver circuit 32 is connected to the input terminal 211 of the sensor probe 20 via the multi-array switch 50. The driver circuit 32 receives the input signal to drive the sensor probe 20 for monitoring. It is understood that the DAC sharing circuit 30 may also include modulation circuits such as operational amplifiers.

[0062] The ADC sharing circuit 40 includes an analog-to-digital conversion circuit 41 and a receiving circuit 42 (see Figure 9 The receiving circuit 42 is connected to the output terminal 221 of the sensor probe 20 via the multi-array switch 50. The receiving circuit 42 receives the analog signal (typically a voltage V signal) collected by the sensor probe 20 via the output terminal 221. The analog-to-digital conversion circuit 41 converts the analog signal received by the receiving circuit 42 into a digital signal recognizable by the MCU 10, thereby completing the MCU 10's reception of the collected signal from the sensor probe 20. It will be appreciated that the ADC sharing circuit 40 may also include processing circuits such as noise suppression and signal amplification.

[0063] Figure 10In the embodiment, the sensor probe 20 is a blood oxygen sensor 23, which includes a light-emitting device 231 and a photosensor 232. A DAC shared circuit 30 is connected to the light-emitting device 231 via a multi-array switch 50. The DAC shared circuit 30 drives the light-emitting diode of the light-emitting device 231 to emit an appropriate amount of light. After the light penetrates the body tissue, it is received by the photosensitive diode of the photosensor 232. An ADC shared circuit is connected to the photosensor 232 via the multi-array switch 50. The analog signal received by the photosensitive diode is converted into a digital current signal by the ADC shared circuit, which is then received and processed by the MCU 10.

[0064] Please see Figure 11 The logic control timing diagram is Figure 11 In this embodiment, the logic control sequence includes N time periods, t1 to tN, within a period T, corresponding to the N number of blood oxygen sensors 23. Each of the N time periods has the same duration, i.e., t1 = t2 = t3 ... = tN. The MCU 10 controls one blood oxygen sensor 23 for monitoring within each time period. The conduction interval of each blood oxygen sensor 23 is also T, meaning that the conduction period of each blood oxygen sensor 23 is consistent with the period of the logic control sequence.

[0065] Typically, the blood oxygen sensor 23 includes two light sources, red light and infrared light, so the light emitting device 231 includes a red light source 2311 and an infrared light source 2312. The DAC sharing circuit 30 drives the red light source 2311 and the infrared light source 2312 to emit light in sequence. Figure 12 , within a time period t1 during which the blood oxygen sensor 23 operates, there are also corresponding subdivisions into a first sub-time period t11 and a second sub-time period t12. The logic control sequence needs to set the alternating driving logic of the red light source 2311 and the infrared light source 2312. In the time period t1, the logic control sequence first drives the red light source 2311 to emit light in the first sub-time period t11, and then drives the infrared light source 2312 to emit light in the second sub-time period t12. That is, the blood oxygen sensor 23 also has a mechanism of alternating red and infrared light emission in a lighting cycle t1, and also keeps the conduction period consistent with the period of the logic control sequence. Or, as Figure 12a As shown, the total cycle T of the logic control sequence is divided into a period t3 and a period t4. The logic control sequence sequentially drives the red light sources 2311 of the N blood oxygen sensors 23 to emit light during the t3 period, and then sequentially drives the infrared light sources 2312 of the N blood oxygen sensors 23 to emit light during the t4 period. Similarly, the red light source 2311 and the infrared light source 2312 of each blood oxygen sensor 23 can both emit light within the cycle T, and the photosensitive device 232 can receive the infrared light signal and the red light signal respectively within the cycle T.

[0066] An embodiment see Figure 13The multi-channel monitoring system 100 of the present application also includes a signal modulation module 60 and a pre-processing module 70. The signal modulation module 60 is arranged between the pre-processing module 70 and the MCU 10. After the MCU 10 collects multiple vital sign data from at least two sensor probes 20, the collected multiple vital sign data are transmitted to the signal modulation module 60. The signal modulation module 60 adjusts the multiple vital sign data into a timing signal corresponding to each sensor probe 20, and the pre-processing module 70 adjusts the timing signal into a multi-channel signal corresponding to each sensor probe 20. The modulated multi-channel signal has great advantages when applied to clinical application scenarios that require joint analysis of multi-channel signals. Such as screening for congenital heart disease in newborns, identification of patient shock status, etc.

[0067] One embodiment continues to see Figure 13 The multi-channel monitoring system 100 also includes a joint analysis application module 80. The joint analysis application module 80 is connected to the preprocessing module 70 and is used to perform physiological characteristic analysis on the multi-channel signals output by the preprocessing module 70. The joint analysis application module 80 can select all the multi-channel signals output by the preprocessing module 70 and perform physiological characteristic analysis, or it can only select two or more channel signals for physiological characteristic analysis. Because the joint analysis application module 80 is directly connected to the preprocessing module 70, during the physiological characteristic analysis process, the joint analysis application module 80 can directly extract any multi-channel signals without the need for additional hardware or software processing, which greatly improves the efficiency and stability of the system.

[0068] For an example, see Figure 14 The multi-channel monitoring system 100 of the present application further includes an algorithm module 90. The algorithm module 90 is also connected to the pre-processing module 70 and is used to analyze the multi-channel signals output by the pre-processing module 70, thereby obtaining analysis results for each channel signal. It is understood that the multi-channel monitoring system 100 of the present application may also include the algorithm module 90 and the joint analysis application module 80. The algorithm module 90 inputs the calculated results for each channel into the joint analysis application module 80 for further physiological characteristic analysis, thereby reducing the computational load of the joint analysis application module 80.

[0069] The multi-channel monitoring system 100 of the present application not only simplifies the design model of the system hardware and greatly reduces the application cost, but also realizes quick and convenient interconnection and interoperability between multiple channels, and has high commercial value. The multi-channel monitoring system 100 of the present application is suitable for monitoring any homologous physiological signals. It can be used not only for multi-channel monitoring of blood oxygen parameters, but also for multi-channel monitoring of parameters such as blood pressure and electrocardiogram. In fact, the multi-channel monitoring system 100 of the present application can also realize the cross-monitoring function of blood oxygen, blood pressure, electrocardiogram and other parameters through the cooperation of different types of sensor probes 20.

[0070] Figure 15 The present invention includes a parameter measurement module 200 including the multi-channel monitoring system 100. The parameter measurement module 200 can be used to be plugged into a plug-in box of a plug-in monitor. The above-mentioned MCU 10, DAC sharing circuit 30, ADC sharing circuit 40 and multi-array switch 50 can be set in the parameter measurement module 200. After the above-mentioned circuit is built into the parameter measurement module 200, it can be inserted into a monitor with a plug-in box. The module also needs to be provided with interfaces for multiple sensor probes 20 corresponding to the monitor, and the sensor probes 20 of the monitor are used to realize the data acquisition work of the multi-channel monitoring system 100. The parameter measurement module 200 of the present application transmits the measurement data to the monitor through the MCU 10 in a serial port / I2C or other manner, so that the monitor has the ability of multi-channel monitoring.

[0071] Figure 16 The present application relates to a patient monitor 300. The patient monitor 300 is equipped with the aforementioned multi-channel monitoring system 100. Since the patient monitor 300 includes a more powerful main control platform, the joint analysis application module 80 and the algorithm module 90 can both be set on the main control platform. The MCU 10 of the multi-channel monitoring system 100 controls the multi-array switch 50 through logic control timing, so that the vital sign data collected by each sensor probe 20 share the same algorithm package, thereby realizing data sharing and collaborative analysis between channels. Since the MCU 10 is only responsible for data collection and transmission of each channel, the remaining data analysis and processing work is completed centrally by the main control platform, thus effectively reducing the hardware cost of the patient monitor 300.

[0072] Figure 17 This application relates to another blood oxygen monitoring system 400. The blood oxygen monitoring system 400 includes a first monitoring circuit 410 and a second monitoring circuit 420. The first monitoring circuit 410 includes a first MCU 411 and a first sensor probe 412. A first digital-to-analog conversion circuit 413 and a first driving circuit 414 are connected between the first MCU 411 and the first sensor probe 412. A first analog-to-digital conversion circuit 415 and a first receiving circuit 416 are also connected between the first MCU 411 and the first sensor probe 412. The first MCU 411 drives the first sensor probe 412 for monitoring through the connected first digital-to-analog conversion circuit 413 and the first driving circuit 414. The connected first analog-to-digital conversion circuit 415 and the first receiving circuit 416 transmit the monitoring results of the first sensor probe 412 back to the first MCU 411. The first sensor probe 412 is a blood oxygen probe.

[0073] Accordingly, the second monitoring circuit 420 includes a second MCU 421 and a second sensor probe 422. A second digital-to-analog conversion circuit 423 and a second drive circuit 424, as well as a second analog-to-digital conversion circuit 425 and a second receiving circuit 426, are also connected between the second MCU 421 and the second sensor probe 422. It will be appreciated that the second digital-to-analog conversion circuit 423 and the second drive circuit 424 are also used by the second MCU 421 to drive and monitor the second sensor probe 422, while the second analog-to-digital conversion circuit 425 and the second receiving circuit 426 are also used by the second MCU 421 to receive data from the second sensor probe 422. The second sensor probe 422 is also a blood oxygen sensor.

[0074] The blood oxygen monitoring system 400 of the present application corresponds to the monitoring work of the first sensor probe 412 and the second sensor probe 422 through the first MCU 411 and the second MCU 421 respectively. The first monitoring circuit 410 and the second monitoring circuit 420 can perform blood oxygen monitoring on the subject at the same time. Through the coordinated matching of the first monitoring circuit 410 and the second monitoring circuit 420, dual blood oxygen monitoring can be performed on the subject. Furthermore, the blood oxygen monitoring system 400 of the present application can also further analyze the dual blood oxygen data through modules such as algorithm packages and joint analysis applications. Because of the homologous physiological signal characteristics of the first monitoring circuit 410 and the second monitoring circuit 420, the blood oxygen monitoring system 400 of the present application achieves higher monitoring accuracy than existing blood oxygen monitors, which is conducive to improving the reliability of clinical monitoring data. On the other hand, the first monitoring circuit 410 and the second monitoring circuit 420 are each equipped with an independently working MCU, which simplifies the MCU's operating logic, can reduce the size of the MCU, and realize the miniaturization of the blood oxygen monitoring system.

[0075] The above-described embodiments do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the above-described embodiments shall be included in the scope of protection of this technical solution.

Claims

1. A multi-channel monitoring system, characterized in that: include: MCU, used to control the operation of the entire machine, the MCU has built-in logic control timing; at least two sensor probes, each sensor probe being used to collect vital sign data of a subject; A DAC sharing circuit, one end of which is connected to the MCU and is used to drive a single sensor probe for monitoring; An ADC sharing circuit, one end of which is connected to the MCU and is used to receive monitoring results of a single sensor probe; a multi-array switch, wherein one end of the multi-array switch is used to connect the DAC sharing circuit and the ADC sharing circuit respectively, and the other end of the multi-array switch is used to connect to the at least two sensor probes; The DAC sharing circuit includes a digital-to-analog conversion circuit and a driving circuit, wherein the driving circuit is connected to the MCU via the digital-to-analog conversion circuit, and the driving circuit is also connected to the sensor probe via the multi-array switch; The ADC sharing circuit includes an analog-to-digital conversion circuit and a receiving circuit, wherein the receiving circuit is connected to the sensor probe through the multi-array switch, and the receiving circuit is connected to the MCU through the analog-to-digital conversion circuit; The at least two sensor probes share one driving circuit and one receiving circuit, and the MCU controls the multi-array switch through the logic control timing to sequentially turn on one of the at least two sensor probes for monitoring.

2. The multi-channel monitoring system according to claim 1, characterized in that: The multi-array switch ensures that the DAC sharing circuit and the ADC sharing circuit act on the same sensor probe at the same time.

3. The multi-channel monitoring system according to claim 1, characterized in that: The multi-array switch includes a first multi-way single-throw switch and a second multi-way single-throw switch. One end of the first multi-way single-throw switch is connected to the DAC shared circuit, and the other end is connected to the at least two sensor probes; One end of the second multi-way single-throw switch is connected to the ADC shared circuit, and the other end is connected to the at least two sensor probes.

4. The multi-channel monitoring system according to claim 3, characterized in that: The sensor probe includes a cathode and an anode, and when the multi-array switch is connected to the cathode of each sensor probe, the anode of each sensor probe is connected to the power supply in a common line; When the multi-array switch is connected to the anode of each sensor probe, the cathode of each sensor probe is collinearly connected to the ground.

5. The multi-channel monitoring system according to claim 1, characterized in that: The multi-array switch includes a multi-way double-throw switch, one end of which is connected to the DAC sharing circuit and the ADC sharing circuit respectively, and the other end of which is connected to the at least two sensor probes.

6. The multi-channel monitoring system according to claim 1, characterized in that: The sensor probe includes at least one of a blood oxygen probe, a blood pressure probe, and an electrocardiogram probe.

7. The multi-channel monitoring system according to claim 6, characterized in that: The sensor probe is a blood oxygen probe, which includes a light emitting device and a photosensitive device.

8. The multi-channel monitoring system according to claim 7, characterized in that: The logic control timing includes multiple time periods within one cycle, the number of the multiple time periods is the same as the number of the at least two sensor probes, the duration of each of the multiple time periods is the same, and the MCU controls one sensor probe for monitoring within one time period.

9. The multi-channel monitoring system according to claim 8, characterized in that: The blood oxygen sensor includes a red light source and an infrared light source. In a time period, the DAC sharing circuit drives the red light source and the infrared light source to emit light in sequence.

10. The multi-channel monitoring system according to claim 1, characterized in that: The multi-channel monitoring system also includes a signal modulation module and a preprocessing module. The signal modulation module is used to adjust the multiple vital sign data collected by the MCU into a timing signal corresponding to each sensor probe, and the preprocessing module adjusts the timing signal into a multi-channel signal.

11. The multi-channel monitoring system according to claim 10, characterized in that: The multi-channel monitoring system further includes a joint analysis application module, which is used to perform physiological characteristic analysis on a combination of two or more channel signals in the multi-channel signals.

12. The multi-channel monitoring system according to claim 10, characterized in that: The multi-channel monitoring system further includes an algorithm module, which is used to analyze each channel signal in the multi-channel signals.

13. The multi-channel monitoring system according to claim 12, characterized in that: The multi-channel monitoring system further includes a joint analysis application module, which is used to perform physiological characteristic analysis on a combination of two or more analysis results in the multi-channel signal analysis results of the algorithm module.

14. A parameter measurement module, characterized in that: The parameter measurement module includes the multi-channel monitoring system according to any one of claims 1 to 13.

15. A monitor, characterized in that: The monitor includes the multi-channel monitoring system according to any one of claims 1 to 13.

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