A power timing management circuit and medical monitoring equipment

Abstract

The present application relates to a power timing management circuit and medical monitoring equipment. The power timing management circuit includes a primary power circuit, multiple secondary power circuits and a controller. The primary management circuit is used to convert AC mains power into a first DC power and output it; multiple secondary power circuits are used to convert the first DC power output by the primary power circuit into a second DC power of different voltage levels; the controller is used to send an enable signal to each secondary power circuit according to a preset timing to start the corresponding secondary power circuit to convert the input first DC power. By enabling the multiple secondary power circuits in terms of timing through the controller, not only can the power-on enabling process of the secondary power supply be precisely controlled, but also the power-on timing stability of each secondary power supply can be ensured, and current backflow caused by power loads of different voltage levels or between different modules can be avoided as much as possible, as well as the unstable power-on of the power load and unexpected device crashes can be avoided.

Description

Technical Field

[0001] The present application relates to the field of power supply technology, and in particular to a power supply timing management circuit and a medical monitoring device. Background Art

[0002] At present, the types of devices used in many medical monitoring equipment are increasing day by day, which puts forward higher performance requirements on the DC power supply used in the equipment. At present, the load voltages are mainly provided by switching power supplies or LDOs. However, due to the differences in the switching power supplies or LDO devices themselves and the different loads carried by each power supply, the power supply is required to not only output stable DC power, but also realize the sequential power-on of the loads. For circuits that strictly require the loads to be powered on sequentially, ordinary DC power supplies cannot achieve this function.

[0003] For most DC power supplies on the current market, multi-level output DC power still uses synchronous output, which cannot meet the power supply requirements of load power-on sequence. Even if some DC power supplies use hardware structures to achieve multi-level enable output, they are limited to passive control of power timing adjustment methods. Not only can they not control the delay time of timing adjustment, but they can also not perform closed-loop inspections on the voltages of each level of output, which makes DC power supplies still unable to be applied to some equipment that has strict requirements on power performance.

[0004] In actual applications, due to the different loads carried by the DC power supply, if these loads are powered on at the same time, it is easy for the current provided to some loads to be reversely injected into the remaining loads, which will greatly increase the risk of power-on failure of the equipment, often resulting in the DC power supply and loads not being able to work properly. In severe cases, it will cause system freezes, freezes, and device short circuits. Summary of the invention

[0005] The main technical problem solved by this application is how to effectively manage the power timing of a DC power supply in a medical monitoring device. To solve the above technical problem, this application provides a power timing management circuit and a medical monitoring device.

[0006] According to the first aspect, an embodiment provides a power timing management circuit, which includes: a primary power supply circuit, used to access AC mains, and convert the AC mains into a first DC power and output it; multiple secondary power supply circuits, all connected to the primary power supply circuit, used to convert the first DC power output by the primary power supply circuit into a second DC power of different voltage levels; a controller, including multiple enable terminals and connected one-to-one with each of the secondary power supply circuits; the controller is used to send an enable signal to each of the secondary power supply circuits according to a preset timing, and the enable signal is used to start the corresponding secondary power supply circuit to convert the input first DC power.

[0007] Each of the secondary power supply circuits includes a DC input terminal, a DC output terminal and a response terminal; the DC input terminal of the secondary power supply circuit is connected to the output terminal where the first DC power output by the primary power supply circuit is located, the response terminal of the secondary power supply circuit is connected to a corresponding enable terminal in the controller, and the DC output terminal of the secondary power supply circuit is used to connect to an electrical load with a voltage level adapted and output a second DC power with a voltage level adapted to the electrical load.

[0008] Each of the secondary power supply circuits adopts a DC / DC regulator or an LDO regulator, and the second direct current output by the secondary power supply circuit is any voltage level between 3V and 24V.

[0009] The controller is used to send an enable signal to each of the secondary power supply circuits according to a preset timing, including: the controller configures the enable timing of each of its own enable terminals, sends an enable signal through the first enable terminal, so that the corresponding secondary power supply circuit converts the input first direct current in response to the enable signal received at its own response terminal, and outputs the second direct current of the first voltage level; the controller sends an enable signal through the second enable terminal after a first delay, so that the corresponding secondary power supply circuit converts the input first direct current in response to the enable signal received at its own response terminal, and outputs the second direct current of the second voltage level; the controller sends an enable signal through the third enable terminal after a second delay, so that the corresponding secondary power supply circuit converts the input first direct current in response to the enable signal received at its own response terminal, and outputs the second direct current of the third voltage level; the controller sends the enable signal according to the enable timing of each enable terminal until each of the secondary power supply circuits outputs the second direct current of the corresponding voltage level.

[0010] The controller also includes multiple feedback terminals, and the multiple feedback terminals of the controller are connected one-to-one with the DC output terminals of each of the secondary power supply circuits; each feedback terminal of the controller is used to receive a feedback signal formed by the second DC power output by the corresponding secondary power supply circuit; the controller is also used to manage the enable signals issued by each of its enable terminals according to the feedback signals received by each of its feedback terminals.

[0011] The controller is also used to manage the enable signals sent by its own enable terminals according to the feedback signals received by its own feedback terminals, including: the controller configures the enable order of its own enable terminals and the detection order of its own feedback terminals, sends the enable signal through the first enable terminal, so that the corresponding secondary power supply circuit responds to the enable signal received by its own response terminal to convert the input first direct current, outputs the second direct current of the first voltage level and sends the feedback signal to the first feedback terminal in the controller; the controller determines that the feedback signal of the first feedback terminal is within a preset fluctuation range, and / or sends the enable signal through the second enable terminal after a first delay, so that the corresponding secondary power supply circuit responds to its own The enable signal received at the response end converts the input first direct current, outputs the second direct current of the second voltage level and sends a feedback signal to the second feedback end in the controller; the controller determines that the feedback signal of the second feedback end is within the preset fluctuation range, and / or sends an enable signal through the third enable end after a second delay, so that the corresponding secondary power supply circuit converts the input first direct current in response to the enable signal received at its own response end, outputs the second direct current of the third voltage level and sends a feedback signal to the third feedback end in the controller; the controller sends the enable signal according to the enable timing of each enable end until each of the secondary power supply circuits outputs the second direct current of the corresponding voltage level.

[0012] The controller also detects the feedback signals of each of its own feedback terminals in real time. If it is determined that the feedback signal of one of the feedback terminals exceeds the preset fluctuation range, the enable signal sent by the corresponding enable terminal is stopped, and the enable signals sent by those enable terminals whose timing is after the enable terminal are stopped.

[0013] A DC bus is provided between the primary power supply circuit and each of the secondary power supply circuits, and an electronic switch is provided on the DC bus, and the electronic switch is connected to the controller signal; the controller also detects the feedback signals of each of its own feedback ends in real time, and if it is determined that the feedback signals of several feedback ends exceed a preset fluctuation range, a control signal is sent to the electronic switch to disconnect the electronic switch.

[0014] In another specific embodiment, a DC bus is provided between the primary power supply circuit and each of the secondary power supply circuits, and an electronic switch is provided on the DC bus, and the electronic switch is connected to the controller signal; the controller also detects the feedback signals of its own feedback ends in real time, and if it is determined that the feedback signals of multiple feedback ends exceed the preset fluctuation range, the enable signals sent by all enable ends are stopped, and a control signal is sent to the electronic switch to open the circuit.

[0015] In another specific embodiment, a DC bus is provided between the primary power supply circuit and each of the secondary power supply circuits, and an electronic switch is provided on the DC bus, and the electronic switch is connected to the controller signal; after stopping the enable signal sent by the corresponding enable end, and stopping the enable signals sent by those enable ends whose timing is subsequent to the enable end, the controller again detects the feedback signal of the feedback end corresponding to the secondary power supply circuit that has stopped enabling, and if these feedback signals do not become zero voltage, a control signal is sent to the electronic switch to open the circuit.

[0016] The preset fluctuation range refers to the voltage fluctuation of the second direct current of any voltage level within ±N%, where N takes any value within the range of 5-20.

[0017] The power timing management circuit further includes an alarm, which is connected to the controller. If the controller determines that the feedback signal of one of the feedback ends exceeds the preset fluctuation range, the controller controls the alarm to generate an alarm signal.

[0018] According to the second aspect, a medical monitoring device is provided in an embodiment, which includes: the power timing management circuit described in the first aspect above; a plurality of power loads adapted to different voltage levels; in the power timing management circuit, each of the secondary power supply circuits is connected to a power load adapted to a voltage level, and is used to output a second direct current adapted to a voltage level to the power load.

[0019] The multiple electrical loads adapted to different voltage levels include: one or more processors adapted to a first voltage level, one or more drivers adapted to a second voltage level, and one or more fluid pumps, pipeline valves or sensors adapted to a third voltage level.

[0020] The multiple electrical loads adapted to different voltage levels also include: a display screen adapted to a fourth voltage level; the secondary power supply circuit connected to the display screen includes a response end, which is connected to a timer or to an enable end of the controller, for responding to an enable signal sent by the timer or responding to an enable signal sent by the controller.

[0021] The beneficial effects of this application are:

[0022] A power timing management circuit and medical monitoring equipment according to the above embodiment, wherein the power timing management circuit includes a primary power circuit, multiple secondary power circuits and a controller, wherein the primary management circuit is used to convert the AC mains into a first DC power and output it; multiple secondary power circuits are used to convert the first DC power output by the primary power circuit into a second DC power of different voltage levels; the controller is used to send an enable signal to each secondary power circuit according to a preset timing, and the enable signal is used to start the corresponding secondary power circuit to convert the input first DC power. The technical solution of the present application performs timing enable control on multiple secondary power circuits through the controller, which not only realizes the function of accurately controlling the power-on enable process of the secondary power supply, but also ensures the power-on timing stability of each secondary power supply, thereby minimizing the current backflow caused by power loads of different voltage levels or between different modules, and preventing the power-on instability of the power load and the accidental crash of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a power timing management circuit in an embodiment;

[0024] Figure 2 A schematic diagram of the structure of a power timing management circuit in another embodiment;

[0025] Figure 3 A schematic diagram of the structure of a medical monitoring device in an embodiment;

[0026] Figure 4 A flowchart of a power timing management method in an embodiment;

[0027] Figure 5 FIG. 4 is a flow chart of a power timing management method in another embodiment. DETAILED DESCRIPTION

[0028] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. 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, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and 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 description in the specification and the general technical knowledge in the art.

[0029] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0030] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0031] Embodiment 1

[0032] Please refer to Figure 1 In this embodiment, a power timing management circuit is disclosed, which mainly includes a primary power circuit 11, multiple secondary power circuits (see reference numerals 121, 122, 123), and a controller 13, which are described below respectively.

[0033] The primary power supply circuit 11 can be connected to AC mains (such as AC220V), and convert the AC mains into a first DC power (see the reference numerals dc11 and dc12) and output it. It can be understood that since the primary power supply circuit 11 realizes the function of converting AC to DC, a conventional AC / DC switching power supply can be used, which should have an AC input terminal and at least one DC output terminal, wherein the AC input terminal is used to connect to AC220V AC mains, and the DC output terminal is used to output a certain voltage level of DC power (such as DC24V, DC12V or DC5V voltage level); since the AC / DC switching power supply is a commonly used power module in various electronic products, and the circuit technology of AC / DC conversion is mature, the circuit structure and working principle of the AC / DC switching power supply will not be described or limited here. In a specific embodiment, see Figure 1 In order to realize the function of the primary power supply circuit 11 to transmit power to multiple secondary power supply circuits and controllers respectively, the primary power supply circuit 11 can transmit the first direct current dc11 (such as DC24V) to multiple secondary power supply circuits (such as 121, 122, 123, ...) through a DC output terminal, and transmit the first direct current dc12 (such as DC5V) to the controller 13 through another DC output terminal; of course, in some cases, the first direct current dc11 and the first direct current dc12 can use the same DC voltage, as long as they can meet the power supply requirements of each secondary power supply circuit and the controller at the same time.

[0034] Multiple secondary power circuits (such as 121, 122, 123) are connected to the primary power circuit 11, and these secondary power circuits are used to convert the first direct current output by the primary power circuit 11 into a second direct current of a different voltage level. Figure 1 The primary power supply circuit 11 outputs a first direct current dc11 to each secondary power supply circuit, wherein the secondary power supply circuit 121 can convert the first direct current dc11 (such as DC24V) into a second direct current dc21 (such as DC3.3V) of a first voltage level, and the secondary power supply circuit 122 can convert the first direct current dc11 (such as DC24V) into a second direct current dc22 (such as DC5V) of a second voltage level; for another example, the secondary power supply circuit 123 can convert the first direct current dc11 (such as DC24V) into a second direct current dc23 (such as DC12V) of a third voltage level.

[0035] It should be noted that the number of secondary power supply circuits can be reasonably set according to the actual requirements of the power load for the voltage level. If some power loads require a total of 4 different voltage levels, then 4 secondary power supply circuits can be set to respectively realize the DC conversion function of different voltage levels. Figure 1 In order to facilitate the introduction of the circuit structure, the secondary power supply circuits 121, 122, and 123 are listed, but this does not constitute a limitation on the number of secondary power supply circuits. The technicians can reasonably increase or decrease the number of secondary power supply circuits according to the needs.

[0036] It should be noted that the specific voltage level of the second direct current that each secondary power supply circuit (such as any one of 121, 122, and 123) converts the first direct current dc11 into should be determined according to the demand of the power load. If the power supply object of any secondary power supply circuit is a processor or other chip, it should meet the requirement of outputting DC3.3V; if the power supply object of any secondary power supply circuit is an electronic module such as a driver, it should meet the requirement of outputting DC5V; if the power supply object of any secondary power supply circuit is an electromagnetic actuator such as a pump or valve, it should meet the requirement of outputting DC12V; if the power supply object of any secondary power supply circuit is a sensor or other component, it should meet the requirement of outputting DC5V or DC12V. In addition, since the secondary power supply circuit realizes the DC / DC conversion function, some conventional DC voltage regulator modules, DC step-down modules, or DC step-up modules can be used as the secondary power supply circuit.

[0037] The controller 13 includes multiple enable terminals (see the reference numerals A1, A2, A3) and is connected one-to-one with each secondary power supply circuit; for example, the enable terminal A1 is connected to the secondary power supply circuit 121, the enable terminal A2 is connected to the secondary power supply circuit 122, and the enable terminal A3 is connected to the secondary power supply circuit 123. The controller 13 is used to send an enable signal to each secondary power supply circuit according to a preset timing, and the enable signal involved here is used to start the corresponding secondary power supply circuit to convert the input first direct current; for example, the controller 13 can send the enable signal EN1 through the enable terminal A1, and the secondary power supply circuit 121 can only start the conversion of the first direct current dc11 into the second direct current dc21 in response to the enable signal EN1; the controller 13 can send the enable signal EN2 through the enable terminal A2, and the secondary power supply circuit 122 can only start the conversion of the first direct current dc11 into the second direct current dc22 in response to the enable signal EN2; the controller 13 can send the enable signal EN3 through the enable terminal A3, and the secondary power supply circuit 123 can only start the conversion of the first direct current dc11 into the second direct current dc23 in response to the enable signal EN3.

[0038] It should be noted that the controller 13 can adopt chips such as CPU, microprocessor, FPGA, single-chip microcomputer, etc., as long as it has multiple IO ports, some of which can be used as enable terminals A1, A2, A3.

[0039] In this embodiment, each secondary power supply circuit includes a DC input terminal, a DC output terminal and a response terminal, wherein the DC input terminal of the secondary power supply circuit is connected to the output terminal where the first DC power outputted by the primary power supply circuit is located, the response terminal of the secondary power supply circuit is connected to a corresponding enabling terminal in the controller, and the DC output terminal of the secondary power supply circuit is used to connect to an electrical load with a voltage level adapted and output a second DC power with a voltage level adapted to the electrical load. Figure 1For the secondary power supply circuit 121, the DC input terminal B11 is connected to the output terminal where the first DC power supply circuit 11 outputs the first DC power dc11, the DC output terminal B12 is used to connect the power load adapted to the first voltage level (for example, DC3.3V), and the response terminal B13 is connected to the enable terminal A1 of the controller 13; for the secondary power supply circuit 122, the DC input terminal B21 is connected to the output terminal where the first DC power supply circuit 11 outputs the first DC power dc11, the DC output terminal B22 is used to connect the power load adapted to the second voltage level (for example, DC5V), and the response terminal B23 is connected to the enable terminal A2 of the controller 13; for the secondary power supply circuit 123, the DC input terminal B31 is connected to the output terminal where the first DC power supply circuit 11 outputs the first DC power dc11, the DC output terminal B32 is used to connect the power load adapted to the third voltage level (for example, DC12V), and the response terminal B33 is connected to the enable terminal A3 of the controller 13. Of course, if there are other secondary power supply circuits, the port structures and wiring relationships of the other secondary power supply circuits can refer to the secondary power supply circuits 121 / 122 / 123, and will not be described one by one here.

[0040] It should be noted that, in order to realize the DC conversion performance of each secondary power supply circuit (such as 121, 122, 123, ...) for different voltage levels, each secondary power supply circuit can use a DC / DC regulator or an LDO regulator, and the second DC output of the secondary power supply circuit is any voltage level from 3V to 24V, so that the DC output end of the secondary power supply circuit can adapt to any voltage level of the power load, as long as the appropriate type of DC / DC regulator or LDO regulator is selected. For example, the secondary power supply circuit can use the LM2596 chip, with Vin, Vout, ON / OFF pins as the DC input end, DC output end and response end respectively, with a wide range of DC input capability and a fixed voltage level (3.3V / 5V / 12V) DC output capability; of course, the secondary power supply circuit can also use LTC3785, LT3790 and other types of chips, as long as the DC voltage regulation function of the appropriate voltage level can be achieved, without strict restrictions.

[0041] In this embodiment, the main function of the controller 13 is to send an enable signal to each secondary power circuit according to a preset timing sequence. The specific implementation process can be referred to Figure 4 Flowchart in .

[0042] Step 311, the controller 13 configures the enabling timing of each enabling terminal of itself, and usually configures the enabling timing of each enabling terminal according to the power-on sequence of different power loads. For devices integrating processors, drivers, pumps and valves, the power-on sequence of processors, drivers, pumps and valves can be followed. Figure 1The enabling timing of each enabling terminal is A1, A2, A3, ..., and the purpose of configuring the enabling timing is to ensure that the enabling terminal in the front timing sends the enabling signal first and the enabling terminal in the back timing sends the enabling signal later.

[0043] exist Figure 1 After configuring the enable timing of each enable terminal, the controller 13 sends an enable signal through the first enable terminal A1, so that the corresponding secondary power supply circuit 121 responds to the enable signal received by its own response terminal B13 to convert the input first direct current dc11 and output the second direct current dc21 of the first voltage level (such as DC3.3V).

[0044] Step 312, the controller 13 sends an enable signal through the second enable terminal A2 after delaying for a first time (such as 100ms, the purpose of the delay is to ensure that the previously enabled secondary power supply circuit 121 can be powered on successfully), so that the corresponding secondary power supply circuit 122 responds to the enable signal received by its own response terminal B23 to convert the input first direct current dc11 and output the second direct current dc22 of the second voltage level (such as DC5V).

[0045] Step 313, the controller 13 sends an enable signal through the third enable terminal A3 after a second delay (such as 200ms, the purpose of the delay is to ensure that the previously enabled secondary power supply circuits 121 and 122 can be powered on successfully), so that the corresponding secondary power supply circuit 123 responds to the enable signal received by its own response terminal B33 to convert the input first direct current dc11, and output the second direct current dc23 of the third voltage level (such as DC12V).

[0046] In step 314, the controller 13 sends an enable signal according to the enable timing of each enable terminal until each secondary power circuit outputs the second direct current of the corresponding voltage level.

[0047] It can be understood that if there are more secondary power supply circuits, the controller 13 is required to enable these secondary power supply circuits in sequence according to the enable sequence, so that these secondary power supply circuits can output stable direct current in sequence, thereby powering on each power load that is adapted to different voltage levels in a timely manner, ensuring the stability of power-on of the power loads and avoiding power-on instability or power-on failure caused by unexpected situations.

[0048] Embodiment 2

[0049] Please refer to Figure 2In this embodiment, a power timing management circuit is disclosed, which includes a primary power circuit 11, multiple secondary power circuits (such as 121, 122, 123) and a controller 13. For the structure and function of the primary power circuit 11, the secondary power circuit 121, the secondary power circuit 122, the secondary power circuit 123 and the controller 13, please refer to the introduction in the first embodiment.

[0050] Compared with the technical solution disclosed in Example 1, the controller 13 not only includes enable terminals A1, A2, and A3, but also includes multiple feedback terminals (such as B1, B2, and B3). The multiple feedback terminals of the controller 13 are connected one-to-one with the DC output terminals of each secondary power supply circuit; for example, the feedback terminal B1 is connected to the DC output terminal B12 of the secondary power supply circuit 121, the feedback terminal B2 is connected to the DC output terminal B22 of the secondary power supply circuit 122, and the feedback terminal B3 is connected to the DC output terminal B32 of the secondary power supply circuit 123.

[0051] It can be understood that since the controller 13 can adopt chips such as CPU, microprocessor, FPGA, single-chip microcomputer, etc., some IO ports with data input and output capabilities on the chip are used as enable terminals A1, A2, and A3, and some IO ports with voltage detection capabilities are used as feedback terminals B1, B2, and B3.

[0052] It can be understood that each feedback terminal of the controller is used to receive a feedback signal formed by the second direct current outputted by the corresponding secondary power supply circuit. For example, the feedback terminal B1 receives a feedback signal formed by the second direct current dc21 on the DC output terminal B12 of the secondary power supply circuit 121, the feedback terminal B2 receives a feedback signal formed by the second direct current dc22 on the DC output terminal B22 of the secondary power supply circuit 122, and the feedback terminal B3 receives a feedback signal formed by the second direct current dc23 on the DC output terminal B32 of the secondary power supply circuit 123.

[0053] In this embodiment, the controller 13 is also used to manage the enable signals sent by each enable end of itself according to the feedback signals received by each feedback end of itself. The specific implementation process can be referred to Figure 5 Flowchart in .

[0054] Step 321, the controller 13 configures the enabling sequence of each enabling terminal and the detection sequence of each feedback terminal. Usually, the enabling sequence of each enabling terminal is configured according to the power-on sequence of different power loads. For the power load a using a processor, the power load b using a driver, and the power load c using a pump / valve / sensor, the enabling sequence can be set according to the enabling terminals A1, A2, and A3, so that the processor, driver, and pump / valve are powered on in sequence. Since there is a one-to-one object relationship between each feedback terminal and each enabling object, the detection sequence can be set according to the feedback terminals B1, B2, and B3, so that the output DC power of the secondary power supply circuits 121, 122, and 123 can be detected respectively.

[0055] exist Figure 1 After configuring the enable timing of each enable terminal and the detection order of each feedback terminal, the controller 13 sends an enable signal through the first enable terminal A1, so that the corresponding secondary power supply circuit 121 responds to the enable signal received by its own response terminal B13 to convert the input first direct current dc11, outputs a second direct current of a first voltage level (such as DC3.3V), and sends a feedback signal to the first feedback terminal B1 in the controller 13.

[0056] In step 322 , the controller 13 delays for a first time (eg, 100 ms) and / or determines whether the feedback signal of the first feedback terminal B1 is within a preset fluctuation range. If so, the controller 13 proceeds to step 323 , otherwise, the controller 13 proceeds to step 327 .

[0057] It should be noted that the preset fluctuation range refers to the voltage fluctuation of the second direct current of any voltage level within ±N%, where N takes any value within 5-20. Then, for the feedback signal formed by the second direct current of the first voltage level, the preset fluctuation range here can be set to 3.3V±10%, that is, a voltage range of 3.3(1-10%)V to 3.3(1+10%)V.

[0058] It should be noted that the controller 13 not only delays the first time but also determines the voltage of the feedback signal to further enhance the power supply stability of the secondary power supply circuit 121 to the electrical load a, ensuring that the electrical load a is less affected by voltage fluctuations during the power-on process. Of course, it is also possible to directly determine the voltage of the feedback signal without delaying the first time, and immediately stop the operation of the corresponding secondary power supply circuit as long as there is a large voltage fluctuation. If the feedback signal exceeds the preset fluctuation range, it means that the corresponding secondary power supply circuit has a fault of its own, or the current of the subsequent secondary power supply circuit is reversed.

[0059] In step 323, the controller 13 sends an enable signal through the second enable terminal A2, so that the corresponding secondary power supply circuit 122 converts the input first direct current dc11 in response to the enable signal received by its own response terminal B23, outputs the second direct current dc22 of the second voltage level (such as DC5V), and sends a feedback signal to the second feedback terminal B2 in the controller 13.

[0060] In step 324 , the controller 13 delays for a second time (eg, 200 ms) and / or determines whether the feedback signal of the second feedback terminal B2 is within a preset fluctuation range. If so, the controller 13 proceeds to step 325 , otherwise, the controller 13 proceeds to step 328 .

[0061] For the feedback signal formed by the second direct current of the second voltage level, the preset fluctuation range here can be set to 5V±10%, that is, a voltage range of 5(1-10%)V to 5(1+10%)V.

[0062] It should be noted that the controller 13 not only delays the second time but also determines the voltage of the feedback signal to further enhance the power supply stability of the secondary power supply circuit 122 to the power load b, and ensures that the power load b is less affected by voltage fluctuations during the power-on process. Of course, the voltage of the feedback signal can also be directly determined without delaying the second time, and the corresponding secondary power supply circuit will be stopped immediately if there is a large voltage fluctuation.

[0063] Step 325, the controller 13 sends an enable signal through the third enable terminal A3, so that the corresponding secondary power supply circuit 123 converts the input first direct current dc11 in response to the enable signal received by its own response terminal B33, outputs the second direct current dc23 of the third voltage level (such as DC12V), and sends a feedback signal to the third feedback terminal B3 in the controller 13.

[0064] In step 326, the controller 13 can still determine whether the feedback signal of the third feedback terminal B3 is within the preset fluctuation range after a certain delay. If so, the next secondary power supply circuit is enabled, otherwise, the corresponding secondary power supply circuit is stopped.

[0065] It can be understood that if there are more secondary power supply circuits, the controller 13 is required to enable these secondary power supply circuits in sequence according to the enable timing of each enable terminal, so that these secondary power supply circuits can output stable direct current in sequence, thereby powering on each power load adapted to different voltage levels (such as power loads a, b, c) in a timely manner, ensuring the stability of power-on of the power loads and avoiding power-on instability or power-on failure caused by unexpected situations.

[0066] Step 327, stop the first enable terminal A1 from sending the enable signal, so that the secondary power supply circuit 121 stops working, avoiding the influence of the output unstable DC power on the power load a.

[0067] Step 328, stop the second enable terminal A2 from sending the enable signal, so that the secondary power supply circuit 122 stops working, avoiding the influence of the output unstable DC power on the power load b.

[0068] Further, see Figure 2 , during the power-on process of each power load a, b, c according to the timing, or after the power-on is completed, the controller 13 can also detect the feedback signals of each feedback terminal (such as B1, B2, B3) in real time. If it is determined that the feedback signal of one of the feedback terminals exceeds the preset fluctuation range, the enable signal sent by the corresponding enable terminal is stopped, and the enable signals sent by the enable terminals whose timing is after the enable terminal are stopped. For example, if the controller 13 detects that the feedback signal of the feedback terminal B2 exceeds the preset fluctuation range, the enable terminals A2 and A3 are stopped from sending enable signals, so that the secondary power supply circuits 122 and 123 stop working, which can prevent the power loads b and c from being affected by the current re-injection, and also facilitate the subsequent re-enabling of the secondary power supply circuits 122 and 123 according to the enable timing.

[0069] Further, see Figure 2 In order to prevent all power supply accidents, a DC bus can be provided between the primary power supply circuit 11 and each secondary power supply circuit (such as 121, 122, 123), so that an electronic switch 14 is provided on the DC bus, and the electronic switch 14 is connected to the controller 13 signal, for example, the trigger end of the electronic switch 14 is connected to a control end C1 of the controller 13. It can be understood that the electronic switch 14, as a protection measure, can also be used in application scenarios where the secondary power supply circuit (such as 121, 122 or 123) itself fails in some cases; for example, when a secondary power supply circuit is short-circuited, although the controller 13 can stop the enable signals sent by all enable terminals (such as A1, A2, A3), the first direct current dc11 is still being input, so the short-circuited secondary power supply circuit is still outputting direct current, which will cause the control of the controller 13 to fail; if the controller 13 sends a control signal through the control terminal C1 to turn off the electronic switch 14, then the first direct current dc11 can be completely cut off, and even the short-circuited secondary power supply circuit will stop outputting direct current, thereby further ensuring the safety of the circuit.

[0070] In a specific embodiment, when each electrical load a, b, c is powered on in sequence, or after the power-on is completed, the controller 13 also detects the feedback signals of each feedback terminal in real time. If it is determined that the feedback signals of several feedback terminals exceed the preset fluctuation range, a control signal is sent to the electronic switch 14 to disconnect the electronic switch 14. It should be understood that the several feedback terminals mentioned here refer to at least one feedback terminal, including one, two or more feedback terminals. For example Figure 2 If the controller 13 detects that the feedback signal of one or more of the feedback terminals B1, B2, and B3 exceeds the preset fluctuation range, the controller 13 directly sends a control signal through the control terminal C1 to open the electronic switch 14, completely powering off the secondary power supply circuits 121, 122, and 123 and stopping working, thereby preventing the power loads a, b, and c from being affected by factors such as current recirculation and power failure.

[0071] In another specific embodiment, the enable terminals A1, A2, A3 and the control terminal C1 of the controller 13 can be used to jointly control the operation of the secondary power circuits 121, 122, and 123. Specifically, during the power-on process of the electrical loads a, b, and c in sequence, or after the power-on is completed, the controller 13 also detects the feedback signals of its own feedback terminals in real time. If it is determined that the feedback signals of multiple feedback terminals exceed the preset fluctuation range, the enable signals sent by all the enable terminals are stopped, and a control signal is sent to the electronic switch 14 to disconnect the electronic switch 14. For example Figure 2 If the controller 13 detects that the feedback signals of more than one of the feedback terminals B1, B2, and B3 exceed the preset fluctuation range, it not only stops the enable terminals A1, A2, and A3 from sending the enable signals, but also sends the control signal KZ1 through the control terminal C1 to open the circuit of the electronic switch 14, so that each secondary power supply circuit 121, 122, and 123 cannot be enabled to work, and each secondary power supply circuit 121, 122, and 123 can be completely powered off, thereby preventing the power loads a, b, and c from being affected by the current backflow, and also avoiding the impact of a fault (such as a short circuit) in the secondary power supply circuit itself.

[0072] In another specific embodiment, the control terminal C1 of the controller 13 can be used to control the short circuit of the secondary power supply circuit itself. Specifically, the controller 13 detects the feedback signals of its own feedback terminals (such as B1, B2, and B3) in real time. If it is determined that the feedback signal of one of the feedback terminals exceeds the preset fluctuation range, the enable signal sent by the corresponding enable terminal is stopped, and the enable signals sent by those enable terminals whose timing is after the enable terminal are stopped. Then, the controller 13 detects the feedback signal of the feedback terminal corresponding to the secondary power supply circuit that has stopped being enabled again. If any of these feedback signals does not become zero voltage, it indicates that the secondary power supply circuit that has stopped being enabled may have a short circuit fault. At this time, the controller 13 can send a control signal KZ1 to the electronic switch 14 through the control terminal C1 to open the circuit of the electronic switch 14. For example Figure 2 When the controller 13 stops the enable terminals A2 and A3 from sending the enable signal, the secondary power supply circuits 122 and 123 will stop working due to the inability to enable. Then, the controller 13 will still detect the feedback signals of the feedback terminals B2 and B3. If any of these feedback signals does not become zero voltage, it indicates that the corresponding secondary power supply circuit 122 or the secondary power supply circuit 123 itself has a short circuit fault. At this time, the controller 13 only stops the enable signal sent by the enable terminals A2 and A3, which has been controlled to be invalid. It is also necessary to send a control signal KZ1 through the control terminal C1 to open the circuit of the electronic switch 14. In this way, the secondary power supply circuits 122 and 123 can be powered off and completely stop working, thereby avoiding the impact of the secondary power supply circuits 122 and 123 on the equipment due to their own short circuit faults.

[0073] It should be noted that the electronic switch 14 provided on the DC bus may be a thyristor, a relay or other components, and no strict limitation is imposed here.

[0074] Further, see Figure 2 , the power timing management circuit in this embodiment also includes an alarm 15, and the alarm 15 is connected to another control terminal C2 of the controller 13. Then, during the process of each power load a, b, c being powered on in sequence, or after the power-on is completed, the controller 13 also detects the feedback signals of its own feedback terminals in real time. If the controller determines that the feedback signal of one of the feedback terminals exceeds the preset fluctuation range, the alarm 15 is controlled to generate an alarm signal. For example, if the controller 13 detects that the feedback signal of the feedback terminal B2 exceeds the preset fluctuation range, the control signal is sent through the control terminal C2 to make the alarm 15 generate an alarm message. It can be understood that the alarm 15 can use electronic components such as buzzers and indicator lights to generate sound / light alarm information.

[0075] It should be noted that since the controller 13 uses chips such as CPU, microprocessor, FPGA, single-chip microcomputer, etc., the redundant IO ports on the chip can be used as control terminals C1 and C2.

[0076] Embodiment 3

[0077] Please refer to Figure 3 In this embodiment, a medical monitoring device is disclosed, which includes a primary power supply circuit 11, multiple power supply circuits at various levels (such as reference numerals 121, 122, and 123), a controller 13, an electronic switch 14, and an alarm 15. For the structures and functions of the primary power supply circuit 11, the secondary power supply circuit 121, the secondary power supply circuit 122, the secondary power supply circuit 123, the controller 13, the electronic switch 14, and the alarm 15, reference can be made to the introduction in Embodiment 1 and Embodiment 2.

[0078] Compared with Example 1 and Example 2, Figure 3 The medical monitoring equipment (such as life monitors, automatic injection devices, anesthesia machines, ventilators, etc.) also includes multiple electrical loads adapted to different voltage levels. Here, multiple electrical loads adapted to different voltage levels may include: one or more processors d adapted to the first voltage level, one or more drivers e adapted to the second voltage level, and one or more fluid pumps, pipeline valves or sensors (i.e., executive components f) adapted to the third voltage level. Among them, the processor d is the main control component of the medical monitoring equipment, which plays the role of key response, parameter adjustment, intelligent control and other functions; the driver e is a driving component that adjusts the pump / valve / sensor to change the working state, and plays the role of controlling the amount of adjustment; the executive component f is the terminal executive component, such as a pump / valve / sensor, etc. The pump plays the role of pumping in / out of fluids such as oxygen, anesthetic gas, and injection solution, the valve plays the role of adjusting or shutting down the flow of the fluid, and the sensor plays the role of detecting various physiological parameters of the patient.

[0079] exist Figure 3 In the embodiment, each secondary power supply circuit is connected to an electrical load with a voltage level adapted thereto, and is used to output a second direct current with a voltage level adapted thereto to the electrical load. For example, the DC output terminal B12 of the secondary power supply circuit 121 is connected to the processor d, and provides the processor d with a second direct current dc21 (such as DC3.3V) of a first voltage level; the DC output terminal B22 of the secondary power supply circuit 122 is connected to the driver e, and provides the driver e with a second direct current dc22 (such as DC5V) of a second voltage level; the DC output terminal B32 of the secondary power supply circuit 123 is connected to the execution component f, and provides the execution component f with a second direct current dc23 (such as DC12V) of a third voltage level.

[0080] Further, see Figure 3, multiple power loads adapted to different voltage levels include not only processor d, driver e, and execution component f, but also display screen g adapted to the fourth voltage level (such as DC24V), and display screen g plays a role in displaying physiological signals, equipment parameters, and operating modes. In order to provide stable direct current to display screen g, a secondary power supply circuit 124 can also be set for it. Then, the secondary power supply circuit 124 corresponding to display screen g includes a DC input terminal B41, a DC output terminal B42, and a response terminal B43. The DC input terminal B41 is connected to the DC bus at the rear end of the electronic switch 14, and the DC output terminal B42 is connected to the display screen g; the response terminal B43 can be connected to a timer 16 or to an enable terminal A4 of the controller 13.

[0081] It should be noted that when the response terminal B43 is connected to the timer 16, the secondary power supply circuit 124 can start the DC conversion in response to the enable signal sent by the timer 16, and when the response terminal B43 is connected to the enable terminal A4 of the controller 13, the secondary power supply circuit 124 starts the DC conversion in response to the enable signal sent by the controller 13. It should be noted that the use of the timer 16 to generate the enable signal is because the timer 16 can be set on the circuit board of the display screen g, and does not need to be connected to the controller 13 through a long distance; and the timer 16 can be set to a timing time of 500ms, so that the enable signal is sent after the timing ends, and other electrical loads can be powered on and started within this time period.

[0082] In this embodiment, Figure 3Each power load (such as processor d, driver e, execution unit f, display screen g) has a power-on sequence in the power-on startup process, and each enable terminal A1, A2, A3, A4 can be configured as an enable timing, then the controller 13 sends an enable signal through the first enable terminal A1, so that the corresponding secondary power supply circuit 121 starts working and outputs the second direct current dc21 of the first voltage level (such as DC3.3V), so that the processor d enters the working state. Then, after delaying the first time (such as 100ms), the controller 13 determines that the feedback signal of the first feedback terminal B1 is within the preset fluctuation range, and then sends an enable signal through the second enable terminal A2, so that the corresponding secondary power supply circuit 122 starts working and outputs the second direct current dc22 of the second voltage level (such as DC5V), so that the driver e enters the working state. Next, after the controller 13 has delayed for a second time (e.g., 200ms), it determines that the feedback signal of the second feedback terminal B2 is within the preset fluctuation range, and then sends an enable signal through the third enable terminal A3, so that the corresponding secondary power supply circuit 123 starts working and outputs the second direct current dc23 of the third voltage level (e.g., DC12V), so that the execution component f enters the working state. Finally, after the controller 13 has delayed for a third time (e.g., 300ms), it determines that the feedback signal of the third feedback terminal B3 is within the preset fluctuation range, and then sends an enable signal through the fourth enable terminal A4 or the enable signal triggered by the timer 16 is terminated at a fixed time, so that the corresponding secondary power supply circuit 124 starts working and outputs the second direct current dc24 of the fourth voltage level (e.g., DC24V), so that the display screen g enters the working state.

[0083] Those skilled in the art will appreciate that all or part of the functions of the various methods in the above-mentioned embodiments can be implemented by hardware or by computer programs. When all or part of the functions in the above-mentioned embodiments are implemented by computer programs, the program can be stored in a computer-readable storage medium, and the storage medium can include: read-only memory, random access memory, disk, optical disk, hard disk, etc., and the program is executed by a computer to implement the above-mentioned functions. For example, the program is stored in the memory of the device, and when the program in the memory is executed by the processor, all or part of the above-mentioned functions can be implemented. In addition, when all or part of the functions in the above-mentioned embodiments are implemented by computer programs, the program can also be stored in a storage medium such as a server, another computer, disk, optical disk, flash disk or mobile hard disk, and can be downloaded or copied and saved in the memory of the local device, or the system of the local device is updated, and when the program in the memory is executed by the processor, all or part of the functions in the above-mentioned embodiments can be implemented.

[0084] The above specific examples are used to illustrate the technical solution of this application, which is only used to help understand this application and is not intended to limit this application. For technicians in the technical field of the invention of this application, according to the idea of ​​this application, they can also make some simple deductions, deformations or substitutions.

Claims

1. A power timing management circuit, characterized in that: include: A primary power supply circuit, used for receiving AC mains power, converting the AC mains power into a first DC power and outputting the first DC power; A plurality of secondary power supply circuits, each connected to the primary power supply circuit, and configured to convert the first direct current output by the primary power supply circuit into a second direct current of a different voltage level; A controller, comprising a plurality of enable terminals and connected to each of the secondary power supply circuits in a one-to-one correspondence; the controller is used to send an enable signal to each of the secondary power supply circuits according to a preset timing sequence, and the enable signal is used to start the corresponding secondary power supply circuit to convert the input first direct current; Each of the secondary power supply circuits includes a DC input terminal, a DC output terminal and a response terminal; the DC input terminal of the secondary power supply circuit is connected to the output terminal where the first DC power outputted by the primary power supply circuit is located, the response terminal of the secondary power supply circuit is connected to a corresponding enabling terminal in the controller, and the DC output terminal of the secondary power supply circuit is used to connect to an electrical load with a voltage level adapted thereto and output a second DC power with a voltage level adapted thereto to the electrical load; The controller further comprises a plurality of feedback terminals, and the plurality of feedback terminals of the controller are connected one by one with the DC output terminals of each of the secondary power supply circuits; each feedback terminal of the controller is used to receive a feedback signal formed by the second DC power outputted by the corresponding secondary power supply circuit; The controller is also used to manage the enable signals sent by its own enable ends according to the feedback signals received by its own feedback ends; and to detect the feedback signals of its own feedback ends in real time. If it is determined that the feedback signal of one of the feedback ends exceeds a preset fluctuation range, the enable signal sent by the corresponding enable end is stopped, and the enable signals sent by those enable ends whose timing is after the enable end are stopped.

2. The power timing management circuit according to claim 1, characterized in that: Each of the secondary power supply circuits adopts a DC / DC regulator or an LDO regulator, and the second direct current output by the secondary power supply circuit is any voltage level between 3V and 24V.

3. The power timing management circuit according to claim 1, characterized in that: The controller is used to send an enable signal to each of the secondary power supply circuits according to a preset timing, including: The controller configures the enable timing of each enable terminal of the controller, sends an enable signal through the first enable terminal, and enables the corresponding secondary power supply circuit to convert the input first direct current in response to the enable signal received by the response terminal of the controller, and output the second direct current of the first voltage level; The controller sends an enable signal through the second enable terminal after a first delay, so that the corresponding secondary power supply circuit converts the input first direct current in response to the enable signal received by its own response terminal, and outputs a second direct current of a second voltage level; The controller sends an enable signal through the third enable terminal after a second delay, so that the corresponding secondary power supply circuit converts the input first direct current in response to the enable signal received by its own response terminal, and outputs a second direct current of a third voltage level; The controller sends an enable signal according to the enable timing of each enable terminal until each of the secondary power supply circuits outputs the second direct current of the corresponding voltage level.

4. The power timing management circuit according to claim 1, characterized in that: The controller is also used to manage the enable signals sent by each enable terminal of the controller according to the feedback signals received by each feedback terminal of the controller, including: The controller configures the enabling timing of each enabling terminal and the detection order of each feedback terminal, sends an enabling signal through the first enabling terminal, so that the corresponding secondary power supply circuit converts the input first direct current in response to the enabling signal received by its own response terminal, outputs the second direct current of the first voltage level and sends a feedback signal to the first feedback terminal in the controller; The controller sends an enable signal through the second enable terminal after delaying the first time and / or determining that the feedback signal of the first feedback terminal is within the preset fluctuation range, so that the corresponding secondary power supply circuit converts the input first direct current in response to the enable signal received by its own response terminal, outputs the second direct current of the second voltage level and sends a feedback signal to the second feedback terminal in the controller; The controller sends an enable signal through the third enable terminal after delaying the second time and / or determining that the feedback signal of the second feedback terminal is within the preset fluctuation range, so that the corresponding secondary power supply circuit converts the input first direct current in response to the enable signal received by its own response terminal, outputs the second direct current of the third voltage level and sends a feedback signal to the third feedback terminal in the controller; The controller sends an enable signal according to the enable timing of each enable terminal until each of the secondary power supply circuits outputs the second direct current of the corresponding voltage level.

5. The power timing management circuit according to claim 1, characterized in that: A DC bus is provided between the primary power supply circuit and each of the secondary power supply circuits, and an electronic switch is provided on the DC bus. The electronic switch is connected to the controller signal, and the controller also detects the feedback signals of its own feedback ends in real time. If it is determined that the feedback signals of several feedback ends exceed a preset fluctuation range, a control signal is sent to the electronic switch to disconnect the electronic switch.

6. The power timing management circuit according to claim 4, characterized in that: A DC bus is provided between the primary power supply circuit and each of the secondary power supply circuits, an electronic switch is provided on the DC bus, and the electronic switch is connected to the controller signal; The controller also detects the feedback signals of its own feedback terminals in real time. If it is determined that the feedback signals of multiple feedback terminals exceed the preset fluctuation range, the controller stops the enable signals sent by all enable terminals and sends a control signal to the electronic switch to disconnect the electronic switch.

7. The power timing management circuit according to claim 1, characterized in that: A DC bus is provided between the primary power supply circuit and each of the secondary power supply circuits, an electronic switch is provided on the DC bus, and the electronic switch is connected to the controller signal; After stopping the enable signal sent by the corresponding enable terminal and stopping the enable signals sent by those enable terminals whose timing is after the enable terminal, the controller again detects the feedback signal of the feedback terminal corresponding to the secondary power supply circuit that has stopped enabling. If any of these feedback signals does not become zero voltage, a control signal is sent to the electronic switch to open the circuit.

8. The power timing management circuit according to any one of claims 1 to 7, characterized in that: The preset fluctuation range refers to the voltage fluctuation of the second direct current of any voltage level within ±N%, wherein N takes any value within the range of 5 to 20.

9. The power timing management circuit according to any one of claims 1 to 7, characterized in that: Also includes an alarm, the alarm is connected to the controller; If the controller determines that the feedback signal of one of the feedback ends exceeds the preset fluctuation range, the controller controls the alarm to generate an alarm signal.

10. A medical monitoring device, characterized in that: include: The power timing management circuit according to any one of claims 1 to 9; Multiple power loads adapted to different voltage levels; In the power supply timing management circuit, each of the secondary power supply circuits is connected to an electrical load with a voltage level adapted thereto, and is used to output a second direct current with a voltage level adapted thereto to the electrical load.

11. The medical monitoring device according to claim 10, characterized in that: The multiple electrical loads adapted to different voltage levels include: one or more processors adapted to a first voltage level, one or more drivers adapted to a second voltage level, and one or more fluid pumps, pipeline valves or sensors adapted to a third voltage level.

12. The medical monitoring device according to claim 11, characterized in that: Multiple electrical loads adapted to different voltage levels also include a display screen adapted to a fourth voltage level; the secondary power supply circuit connected corresponding to the display screen includes a response end, which is connected to a timer or to an enable end of the controller, for responding to an enable signal sent by the timer or responding to an enable signal sent by the controller.

Images