Power supply monitoring device for an infusion pump and infusion pump
Patent Information
- Application Number
- CN202522440916.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-18
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-11-18
AI Technical Summary
传统报警电路采用微处理器或复杂模拟电路，在电源失效后依赖电池供电，但电池容量有限，导致报警持续时间短，难以满足临床长时间报警的需求
1.通过设置储能元件CS1，当外部电源VDC和备用电池VBAT均失效时，储能元件CS1可为逻辑控制单元和报警执行单元放电供电。同时，逻辑控制单元精准判断电源状态，在两者均失效时才生成间断控制信号，驱动报警执行单元根据该间断信号发出间断的报警提示。这种设计利用储能元件的电能进行间断报警，解决了现有技术中电源失效后依赖电池供电而导致报警持续时间短的问题，实现了低功耗、长续航的报警功能，并且提高了报警的精准性和可靠性。
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Figure CN224907239U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power supply monitoring technology, and in particular to a power supply monitoring device for an injection pump and an injection pump. Background Technology
[0002] Infusion pumps, as sophisticated devices in clinical medicine, play a vital role in ensuring safe patient treatment. They precisely control the infusion rate and dosage of medications, providing accurate drug therapy. With the continuous development of medical technology, infusion pumps have been widely used in various hospital departments, such as intensive care units, operating rooms, and emergency scenes, greatly improving the efficiency and safety of medical treatment.
[0003] In existing technologies, to cope with emergencies such as power outages, the power supply system of infusion pumps typically employs a dual-protection scheme of external power supply and backup battery. For power alarm circuits, the traditional approach is to use microprocessors or complex analog circuits to implement the alarm function. Some circuits only detect a single power state, using a simple detection mechanism to determine whether an alarm is needed. Other circuits feature multi-component designs, attempting to improve alarm accuracy through the coordinated operation of multiple components.
[0004] However, existing technologies have significant drawbacks. Traditional alarm circuits use microprocessors or complex analog circuits, relying on batteries for power after a power failure. However, battery capacity is limited, resulting in short alarm durations that cannot meet the needs of long-term clinical alarms. Some circuits that only monitor a single power supply state are prone to false alarms or missed alarms, leading to low reliability. Circuits with multi-component designs are difficult to integrate, costly, and have poor anti-interference capabilities, affecting the overall stability of the infusion pump. Utility Model Content
[0005] In order to at least partially solve the above-mentioned technical problems in the prior art, this application provides a power supply monitoring device for an injection pump and an injection pump.
[0006] On the one hand, this application provides a power supply monitoring device for an infusion pump, which adopts the following technical solution: A power supply monitoring device for an infusion pump, comprising: The power processing unit includes a power chip U1 and an energy storage element CS1. The input terminal of the power chip U1 is used to connect to an external power supply VDC and a backup battery VBAT. The output terminal of the power chip U1 is used to connect to the supply voltage terminal VCC and the energy storage element CS1, so as to convert the input voltage of the external power supply VDC and the backup battery VBAT into the supply voltage and charge the energy storage element CS1. The logic control unit is used to detect the voltage status of the external power supply VDC and the backup battery VBAT, and generates an intermittent control signal when both the external power supply VDC and the backup battery VBAT are detected to be in failure. An alarm execution unit, connected to the logic control unit, is used to generate an alarm prompt based on the intermittent control signal.
[0007] By employing the above technical solution, and by setting up an energy storage element CS1, when both the external power supply VDC and the backup battery VBAT fail, the energy storage element CS1 can discharge power to the logic control unit and the alarm execution unit. Simultaneously, the logic control unit accurately determines the power state and only generates an intermittent control signal when both fail, driving the alarm execution unit to issue intermittent alarm prompts based on this intermittent signal. This design utilizes the energy stored in the energy storage element for intermittent alarms, solving the problem of short alarm duration caused by reliance on battery power after power failure in existing technologies. It achieves low-power, long-lasting alarm functionality and improves the accuracy and reliability of the alarm.
[0008] Optionally, a first resistor R1 and a unidirectional single-pass element D3 are sequentially provided between the output terminal of the power chip U1 and the power supply voltage terminal VCC.
[0009] By adopting the above technical solution, by setting the first resistor R1, the charging current can be limited when the power chip U1 charges the energy storage element CS1, preventing overcurrent from damaging other components; by setting the unidirectional single-pass element D3, the reverse current can be prevented from flowing into the power chip U1 when the external power supply and backup battery are disconnected and the energy storage element CS1 is discharging, thus ensuring the stability and safety of the power supply when the power supply fails.
[0010] Optionally, the input terminal of the power chip U1 is connected to ground via the first capacitor C1, and the output terminal of the power chip U1 is connected to ground via the second capacitor C2.
[0011] By adopting the above technical solution, by setting the first capacitor C1 and the second capacitor C2 to ground at the input and output terminals of the power chip U1 respectively, the input and output voltages can be filtered, further improving the stability of the power chip U1 and ensuring that its output power supply voltage VCC is more stable.
[0012] Optionally, the energy storage element CS1 includes a supercapacitor, wherein the positive terminal of the supercapacitor is connected to the cathode of the unidirectional single-pass element D3 and the power supply voltage terminal VCC, and the negative terminal of the supercapacitor is connected to ground.
[0013] Using the above technical solution, the energy storage element CS1 adopts a supercapacitor. Utilizing its high capacitance and high energy density characteristics, it can provide power to the subsequent logic control unit and alarm execution unit for a longer period of time when both the external power supply VDC and the backup battery VBAT fail, significantly extending the alarm duration and thus achieving long-lasting alarm operation.
[0014] Optionally, the logic control unit includes a logic gate chip U2, a resistor network, and a timing capacitor; the logic gate chip U2 is used to detect the voltage state of the external power supply VDC and the backup battery VBAT; the timing control capacitor is connected to the output terminal of the logic gate chip U2 and is used to generate intermittent control signals according to the logic output of the logic gate chip U2; the resistor network is connected to the logic gate chip U2 and the timing capacitor, and includes multiple resistors, which are used for voltage division, biasing, or timing control.
[0015] The above technical solution uses logic gate chips, resistor networks, and sequential capacitors to construct a logic control unit, replacing the complex microprocessor or analog circuits of traditional technologies. Through the cooperation of sequential capacitors and logic gate chips, periodic high and low level signals, i.e., intermittent control signals, can be generated to control the intermittent operation of the alarm execution unit, achieving low power consumption. This solution features a simple circuit structure, low cost, high reliability, and ease of integration.
[0016] Optionally, the logic gate chip U2 includes a first NOR gate circuit U2A, a second NOR gate circuit U2B, a fourth NOR gate circuit U2D, and a third NOR gate circuit U2C connected in sequence; wherein, the external power supply VDC and the backup battery VBAT are divided and input to the first NOR gate circuit U2A, the output of the first NOR gate circuit U2A is sequentially connected to the second NOR gate circuit U2B, the third NOR gate circuit U2C, and the fourth NOR gate circuit U2D, and the output terminal of the fourth NOR gate circuit U2D is connected to the alarm execution unit.
[0017] By employing the above technical solution, the voltages of the external power supply VDC and the backup battery VBAT are divided and input into the first NOR gate circuit U2A. After subsequent cascaded logic operations of multiple NOR gate circuits, it is possible to accurately determine whether both the external power supply and the backup battery have failed. This design provides accurate and reliable triggering conditions for generating intermittent control signals, ensuring that the alarm is only activated when both power supplies fail, thus avoiding false alarms or missed alarms.
[0018] Optionally, the sequential capacitors include a fourth capacitor C4 and a fifth capacitor C5 connected in parallel.
[0019] By employing the above technical solution, the capacitance values can be flexibly combined through the parallel connection of the fourth capacitor C4 and the fifth capacitor C5 to precisely tune the total capacitance of the sequential capacitors. This allows the logic control unit to more accurately control the frequency of the generated periodic high and low level signals, i.e., the frequency of the intermittent control signals, thereby achieving effective control over the rhythm of the alarm sound.
[0020] Optionally, the alarm execution unit includes a field-effect transistor Q1 and an alarm sounding device SP1; the gate of the field-effect transistor Q1 is connected to the logic control unit to receive intermittent control signals, the source of the field-effect transistor Q1 is connected to the power supply voltage terminal VCC, the drain of the field-effect transistor Q1 is connected to the positive terminal of the alarm sounding device SP1, and the negative terminal of the alarm sounding device SP1 is grounded.
[0021] The above technical solution utilizes a field-effect transistor (FET) Q1 as an electronic switch, whose gate receives intermittent control signals from the logic control unit. FET Q1 periodically turns on and off according to these signals, thereby controlling the periodic energizing and de-energizing of the alarm emitting device SP1 connected to its drain. This design enables the alarm emitting device SP1 (e.g., a buzzer) to emit intermittent alarm sounds based on the intermittent control signals, achieving the function of intermittent alarming. Compared to continuous alarming, this effectively reduces the average power consumption of the alarm execution unit.
[0022] Optionally, the gate of the field-effect transistor Q1 is connected to the output terminal of the logic control unit 20 through the fifth resistor R5, and to the power supply voltage terminal VCC through the third resistor R3.
[0023] Using the above technical solution, the fifth resistor R5 connects the output terminal of the logic control unit to the gate of the field-effect transistor Q1, which can limit current and protect the output stage of the logic control unit. The third resistor R3 pulls the gate of the field-effect transistor Q1 up to the supply voltage VCC, ensuring that the field-effect transistor Q1 can be reliably cut off (turned off) when the logic control unit outputs a high impedance state or a default state, preventing the alarm sounding device SP1 from being falsely triggered and improving the stability of alarm control.
[0024] On the other hand, this application also provides an infusion pump, which adopts the following technical solution: An injection pump having the aforementioned power supply monitoring device for the injection pump.
[0025] By integrating the power supply monitoring device into the infusion pump using the above technical solution, the infusion pump can still utilize the power of energy storage components (such as supercapacitors) to provide long-term, intermittent alarms through low-power logic control and alarm execution units, even in extreme cases where both external power and backup batteries fail. This solves the problems of short alarm duration, low reliability, complex circuitry, or high power consumption in existing infusion pumps after complete power failure, greatly improving the safety of infusion pumps in clinical use.
[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By incorporating an energy storage element CS1, when both the external power supply VDC and the backup battery VBAT fail, CS1 can discharge power to the logic control unit and the alarm execution unit. Simultaneously, the logic control unit accurately determines the power status and only generates an intermittent control signal when both fail, driving the alarm execution unit to issue intermittent alarm prompts based on this signal. This design utilizes the energy stored in the energy storage element for intermittent alarms, solving the problem of short alarm duration caused by reliance on battery power after power failure in existing technologies. It achieves low-power, long-lasting alarm functionality and improves the accuracy and reliability of the alarm.
[0027] 2. A logic control unit is constructed using logic gate chips, resistor networks, and sequential capacitors, replacing the complex microprocessors or analog circuits of traditional technologies. Through the cooperation of sequential capacitors and logic gate chips, periodic high and low level signals, i.e., intermittent control signals, can be generated to control the intermittent operation of the alarm execution unit, achieving low power consumption. This solution features a simple circuit structure, low cost, high reliability, and ease of integration.
[0028] 3. A field-effect transistor (FET) Q1 is used as an electronic switch, with its gate receiving intermittent control signals from the logic control unit. FET Q1 periodically turns on and off according to these signals, thereby controlling the periodic energizing and de-energizing of the alarm audible device SP1 connected to its drain. This design enables the alarm audible device SP1 (e.g., a buzzer) to emit intermittent alarm sounds based on the intermittent control signals, achieving the function of intermittent alarming. Compared to continuous alarming, this effectively reduces the average power consumption of the alarm execution unit. Attached Figure Description
[0029] Figure 1 A schematic diagram of the circuit structure of a power supply monitoring device for an infusion pump is shown in an embodiment of this application.
[0030] Explanation of reference numerals in the attached diagram: 10, power processing unit; 20, logic control unit; 30, alarm execution unit. Detailed Implementation
[0031] The following combination Figure 1 This application will be described in further detail.
[0032] This application discloses a power supply monitoring device for an infusion pump.
[0033] Figure 1 A circuit diagram of a power supply monitoring device for an infusion pump, according to an embodiment of this application, is shown. Figure 1 As shown, the power supply monitoring device for the infusion pump includes a power processing unit 10, a logic control unit 20, and an alarm execution unit 30. The power processing unit 10 converts the input voltage from the external power supply or backup battery into a stable voltage and buffers it. The logic control unit 20 detects the voltage status of the external power supply and backup battery, generating an intermittent control signal when both fail simultaneously. The alarm execution unit 30 issues an alarm based on the intermittent control signal, thus achieving the beneficial effects of accurate alarm triggering, low power consumption and long battery life, and simple and reliable circuitry. This is because the power processing unit 10 can stably supply power and store energy, the logic control unit 20 accurately judges the power supply status, and the alarm execution unit 30 issues alarms as needed, with each unit working collaboratively.
[0034] In some embodiments, the power processing unit 10 includes a power chip U1, a first resistor R1, a unidirectional conducting element D3, and an energy storage element CS1.
[0035] Power chip U1 is one of the core components of the power processing unit, converting the unstable voltage input from an external power source or backup battery into a stable voltage. Power chip U1 can be, for example, a low-dropout linear regulator of model ME6228A50M3G, which can step down the input voltage to 5V. The external power source VDC or the backup battery VBAT is connected to the input terminal of power chip U1 via power interface J1. The output terminal of power chip U1 is connected to the supply voltage terminal VCC via a first resistor R1 and a unidirectional conducting element D3, and is also connected to the positive terminal of energy storage element CS1 to charge CS1. Furthermore, the input terminal of power chip U1 can be connected to ground via a first capacitor C1, and the output terminal of power chip U1 can be connected to ground via a second capacitor C2. By grounding the first capacitor C1 and the second capacitor C2 at the input and output terminals of power chip U1 respectively, the input and output voltages can be filtered, further improving the stability of power chip U1's operation.
[0036] The first resistor R1 serves to limit the charging current and prevent overcurrent from damaging other components. For example, a fixed resistor with a resistance of 33Ω can be used, which is connected in series between the output terminal of the power chip U1 and the unidirectional conducting element D3 in the circuit. Alternatively, the first resistor R1 can be selected with a different resistance value according to the actual circuit requirements, as long as it meets the current limiting requirement.
[0037] The unidirectional conducting element D3 is generally a diode, such as the 1N5819W model diode. Its anode is connected to the first resistor R1, and its cathode is connected to the power supply voltage terminal VCC and the energy storage element CS1. Its function is to prevent current from flowing back into the power supply chip U1. The positive terminal of the energy storage element CS1 is connected to the power supply voltage terminal VCC, and the negative terminal is grounded.
[0038] These components work together to convert the input voltage of an external power source or backup battery into a stable voltage and charge the energy storage element CS1. When the external power source or backup battery is supplying power normally, the power chip U1 outputs a stable voltage, supplying power to the VCC terminal through the first resistor R1 and the unidirectional conducting element D3, and charging the energy storage element CS1. When the external power source or backup battery is de-energized, the energy storage element CS1 discharges, and the unidirectional conducting element D3 prevents reverse current flow.
[0039] In some embodiments, the logic control unit 20 includes a logic gate chip U2, a resistor network, and a timing capacitor.
[0040] The logic gate chip U2 includes multiple cascaded NOR gates, such as a first NOR gate U2A, a second NOR gate U2B, a third NOR gate U2C, and a fourth NOR gate U2D. The external power supply VDC and the backup battery VBAT are divided and input to the first NOR gate U2A. The output of the first NOR gate U2A is sequentially connected to the second NOR gate U2B, the fourth NOR gate U2D, and the third NOR gate U2A. The output of the third NOR gate U2C is connected to the alarm execution unit 30. Through the logic operations of the NOR gates, the voltage status of the external power supply and the backup battery can be accurately determined. The resistor network includes multiple resistors, such as the second resistor R2, the fourth resistor R4, the sixth resistor R6, the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, and the tenth resistor R10. These resistors, through different connection methods and resistance values, achieve voltage division, biasing, and timing control. For example, the external voltage VDC is divided by the sixth resistor R6 and the seventh resistor R7 and then connected to the first input terminal (pin 2) of the first NOR gate circuit U2A. The backup battery VBAT is divided by the fourth resistor R4 and the second resistor R2 and then connected to the second input terminal (pin 3) of the first NOR gate circuit U2A.
[0041] The timing control capacitors include a fourth capacitor C4 and a fifth capacitor C5 connected in parallel. These capacitors are connected to the output of the logic gate chip U2 and are used to generate periodic high and low level signals to control the frequency of the intermittent control signal. Together, these components detect the voltage state of the external power supply and the backup battery, and generate an intermittent control signal when both fail simultaneously. When both the external power supply and the backup battery are normal, the NOR gate outputs a corresponding level based on the divided voltage, and the logic control unit 20 does not generate an intermittent control signal. When both fail simultaneously, the output state of the NOR gate changes, the timing control circuit starts working, and generates periodic high and low level signals, thus producing the intermittent control signal.
[0042] In some embodiments, the alarm execution unit 30 includes a field-effect transistor Q1 and an alarm sounding device SP1.
[0043] The field-effect transistor Q1 acts as an electronic switch. For example, the AO3401A model Q1 has its gate receiving intermittent control signals, its source connected to the power supply voltage VCC, and its drain connected to the alarm sound device SP1 grounded. When the gate receives an intermittent control signal, the field-effect transistor Q1 periodically turns on and off. The alarm sound device SP1 can be a buzzer, such as the HNB09A03 model buzzer. The drain of the field-effect transistor Q1 is connected to the positive terminal of the buzzer, and the negative terminal of the buzzer is grounded.
[0044] The gate of the field-effect transistor Q1 can be connected to the signal output terminal of the logic control unit 20 through the fifth resistor R5, and to the power supply voltage terminal VCC through the third resistor R3. When the field-effect transistor Q1 is turned on, the buzzer is powered on and sounds; when the field-effect transistor Q1 is turned off, the buzzer stops sounding. The alarm sound device SP1 can also be other types of sound-generating devices, such as speakers, as long as they can emit a clear alarm sound.
[0045] These components work together to provide an alarm notification based on intermittent control signals. When the logic control unit 20 generates an intermittent control signal, the field-effect transistor Q1 periodically turns on and off according to the signal, causing the buzzer to emit intermittent alarm sounds.
[0046] The implementation principle of the power supply monitoring device for infusion pumps in this embodiment is as follows: Through the coordinated operation of various units and components, the power supply monitoring device for infusion pumps in this embodiment achieves the advantages of accurate alarm triggering, low power consumption and long battery life, as well as simple and reliable circuitry. Under normal power supply conditions, the power processing unit 10 stably outputs the voltage of the external power supply or backup battery to the power supply voltage terminal VCC and charges the energy storage element CS1. The logic control unit 20 detects that the power supply is normal and does not generate an intermittent control signal; the alarm execution unit 30 does not operate. When both the external power supply and the backup battery fail simultaneously, the energy storage element CS1 begins to discharge to supply power to the circuit. The logic control unit 20 detects the simultaneous failure of the external power supply and the backup battery and generates an intermittent control signal. The alarm execution unit 30 drives the buzzer to emit an intermittent alarm sound according to the intermittent control signal. This design avoids the problems of high power consumption, false alarms and missed alarms, and circuit complexity of traditional alarm circuits, improves the accuracy and reliability of the alarm, reduces costs, and is suitable for various infusion pump products.
[0047] This application also discloses an infusion pump. The infusion pump has a power supply monitoring device as described in the above embodiments.
[0048] The implementation principle of an infusion pump according to an embodiment of this application is as follows: By integrating a power supply monitoring device into the infusion pump, the pump can still utilize the electrical energy of the energy storage element CS1 to provide long-term, intermittent alarms through the low-power logic control unit 20 and alarm execution unit 30 even in extreme cases where both the external power supply and backup battery fail. This solves the problems of short alarm duration, low reliability, complex circuitry, or high power consumption in existing infusion pumps after complete power failure, greatly improving the safety of the infusion pump in clinical use.
[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A power supply monitoring device for an injection pump, characterized in that, include: The power processing unit (10) includes a power chip U1 and an energy storage element CS1; the input terminal of the power chip U1 is used to connect to an external power supply VDC and a backup battery VBAT, and the output terminal of the power chip U1 is used to connect to the power supply voltage terminal VCC and the energy storage element CS1, so as to convert the input voltage of the external power supply VDC and the backup battery VBAT into the power supply voltage and charge the energy storage element CS1. The logic control unit (20) is used to detect the voltage status of the external power supply VDC and the backup battery VBAT, and generate an intermittent control signal when it is detected that both the external power supply VDC and the backup battery VBAT have failed. An alarm execution unit (30) is connected to the logic control unit (20) and is used to generate an alarm prompt based on the intermittent control signal.
2. The power supply monitoring device for an injection pump according to claim 1, characterized in that, A first resistor R1 and a unidirectional single-pass element D3 are sequentially provided between the output terminal of the power chip U1 and the power supply voltage terminal VCC.
3. The power supply monitoring device for an injection pump according to claim 2, characterized in that, The input terminal of the power chip U1 is connected to ground via the first capacitor C1, and the output terminal of the power chip U1 is connected to ground via the second capacitor C2.
4. The power supply monitoring device for an injection pump according to claim 2, characterized in that, The energy storage element CS1 includes a supercapacitor, wherein the positive terminal of the supercapacitor is connected to the cathode of the unidirectional single-pass element D3 and the power supply voltage terminal VCC, and the negative terminal of the supercapacitor is connected to ground.
5. The power supply monitoring device for an injection pump according to claim 1, characterized in that, The logic control unit (20) includes a logic gate chip U2, a resistor network, and a timing capacitor; the logic gate chip U2 is used to detect the voltage state of the external power supply VDC and the backup battery VBAT; the timing control capacitor is connected to the output terminal of the logic gate chip U2 and is used to generate intermittent control signals according to the logic output of the logic gate chip U2; the resistor network is connected to the logic gate chip U2 and the timing capacitor and includes multiple resistors, which are used for voltage division, biasing, or timing control.
6. The power supply monitoring device for an injection pump according to claim 5, characterized in that, The logic gate chip U2 includes a first NOR gate circuit U2A, a second NOR gate circuit U2B, a fourth NOR gate circuit U2D, and a third NOR gate circuit U2C connected in sequence; wherein, the external power supply VDC and the backup battery VBAT are divided and input to the first NOR gate circuit U2A, the output of the first NOR gate circuit U2A is sequentially connected to the second NOR gate circuit U2B, the third NOR gate circuit U2C, and the fourth NOR gate circuit U2D, and the output terminal of the fourth NOR gate circuit U2D is connected to the alarm execution unit (30).
7. The power supply monitoring device for an injection pump according to claim 5, characterized in that, The sequential capacitors include a fourth capacitor C4 and a fifth capacitor C5 connected in parallel.
8. The power supply monitoring device for an injection pump according to claim 1, characterized in that, The alarm execution unit (30) includes a field-effect transistor Q1 and an alarm sound device SP1; the gate of the field-effect transistor Q1 is connected to the logic control unit (20) to receive intermittent control signals, the source of the field-effect transistor Q1 is connected to the power supply voltage terminal VCC, the drain of the field-effect transistor Q1 is connected to the positive terminal of the alarm sound device SP1, and the negative terminal of the alarm sound device SP1 is grounded.
9. The power supply monitoring device for an injection pump according to claim 8, characterized in that, The gate of the field-effect transistor Q1 is connected to the output terminal of the logic control unit 20 through the fifth resistor R5, and is connected to the power supply voltage terminal VCC through the third resistor R3.
10. An infusion pump, characterized in that, It has a power supply monitoring device for an infusion pump as described in any one of claims 1-9.