Gravity sensing type infusion monitoring alarm

Abstract

The utility model discloses a gravity sensing type infusion monitoring alarm which comprises a bottle hanging device, a weight monitoring circuit module and an alarm module. The bottle hanging device comprises a shell, an upper hook, a pressing plate and a lower hook. The weight monitoring circuit module comprises a weight sensor, a signal processing circuit, a key circuit, a first single-chip microcomputer and a wireless transmitter. The weight monitoring circuit module is used for monitoring the weight of an infusion bottle (containing internal liquid medicine) in real time and comparing the detected weight value with a preset alarm threshold value, an alarm trigger signal is sent out once the detected weight value is lower than the alarm threshold value, the alarm trigger signal is sent to the alarm module in a wireless communication mode, and alarm reminding is sent out. According to the technical scheme, the sensor is used for intelligently sensing the weight change, the intelligence of infusion monitoring and alarming is improved, remote alarming can be achieved, and alarming signals can be transmitted in place.

Description

Technical Field

[0001] An embodiment of the present utility model relates to an infusion alarm assembly, and more specifically, to a gravity-sensing infusion monitoring alarm. Background Art

[0002] In order to better monitor the progress of intravenous infusion, people have invented infusion alarm assemblies. The current monitoring methods of infusion alarm assemblies generally include the following several types: weight sensing type, magnetic induction type, pressure sensing type, and infrared sensing type. Each of these monitoring methods has its own advantages and disadvantages. Among them, the gravity sensing type has relatively accurate detection, and can linearly feedback the progress of infusion as the gravity linearly decreases.

[0003] The invention patent with the authorization announcement number CN105107061B discloses a gravity-type infusion alarm assembly, which includes a fixed pulley. A rope-like object or a strip-shaped object is hung on the fixed pulley. A weight is fixed at the first end of the rope-like object or the strip-shaped object, and the second end is for hanging an infusion bottle or an infusion bag. An alarm trigger and a limiting device are also fixed in the shell. The weight is located between the alarm trigger and the limiting device, and the alarm trigger is located below the weight for the weight to touch. When the liquid volume in the infusion bottle or the infusion bag is small, the weight drops and contacts the alarm trigger, so as to make a timely reminder.

[0004] The above-mentioned invention patent technology provides a technical solution for gravity-type infusion alarm, but it cannot ensure that the weight of each kind of liquid medicine can match the weight of the same weight, so the weight needs to be replaced, and the operation is cumbersome. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a gravity-sensing infusion monitoring alarm for the above-mentioned defects in the prior art, which uses a sensor to intelligently sense the weight change.

[0006] To achieve the above-mentioned utility model purpose, the present utility model adopts the following technical solutions: A gravity-sensing infusion monitoring alarm, comprising an infusion bottle hanger, a weight monitoring circuit module installed in the infusion bottle hanger, and an alarm module in remote communication with the weight monitoring circuit module; wherein, the infusion bottle hanger includes a housing, an upper hook installed above the housing, a pressing plate movably installed in the housing, and a lower hook connected to the pressing plate and extending below the housing for hanging an infusion bottle; the weight monitoring circuit module includes a weight sensor, a signal processing circuit, a key circuit, a first single-chip microcomputer, and a wireless transmitter, wherein, the weight sensor is installed between the pressing plate and the bottom of the housing for detecting the weight of the infusion bottle and outputting a weight sensing signal; the signal processing circuit is coupled between the weight sensor and the first single-chip microcomputer for amplifying the weight sensing signal and isolating the front and rear stages; the key circuit is coupled to the first single-chip microcomputer for inputting an alarm threshold; the input end of the first single-chip microcomputer inputs the weight sensing signal and the alarm threshold respectively, and the output end outputs an alarm trigger signal; the wireless transmitter is coupled to the first single-chip microcomputer and wirelessly communicates with the alarm module for wirelessly sending the alarm trigger signal to the alarm module.

[0007] In addition, the present utility model also provides the following subsidiary technical solutions:

[0008] The alarm module includes a wireless receiver, a second single-chip microcomputer, and an alarm circuit, wherein, the wireless receiver wirelessly communicates with the wireless transmitter and is also coupled to the second single-chip microcomputer for wirelessly receiving the alarm trigger signal and forwarding it to the second single-chip microcomputer; the output end of the second single-chip microcomputer is coupled to the alarm circuit and outputs an alarm control signal to the alarm circuit; the alarm circuit is used for emitting a sound and light alarm.

[0009] The weight sensor is a resistance strain gauge type pressure sensor.

[0010] The signal processing circuit includes: a differential amplifier circuit coupled to the weight sensor for amplifying the signal, and a voltage follower coupled to the differential amplifier circuit for isolating the front and rear stages; wherein, the differential amplifier circuit includes a first operational amplifier, a second operational amplifier, a third operational amplifier, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, and resistor R7, the non-inverting input terminals of the first operational amplifier and the second operational amplifier are coupled to the weight sensor, resistor R1 is coupled between the inverting input terminal of the first operational amplifier and the inverting input terminal of the second operational amplifier, resistor R2 is coupled between the inverting input terminal of the first operational amplifier and its output terminal, resistor R3 is coupled between the inverting input terminal of the second operational amplifier and its output terminal, resistor R4 is coupled between the output terminal of the first operational amplifier and the non-inverting input terminal of the third operational amplifier, resistor R5 is coupled between the output terminal of the second operational amplifier and the inverting input terminal of the third operational amplifier, resistor R6 is coupled between the non-inverting input terminal of the third operational amplifier and the ground, and resistor R7 is coupled between the inverting input terminal of the third operational amplifier and its output terminal.

[0011] The models of the first operational amplifier, the second operational amplifier, and the third operational amplifier are all AD8629 operational amplifiers.

[0012] The model of the voltage follower is an OP07 operational amplifier.

[0013] The first single-chip microcomputer and the first single-chip microcomputer are 89C51 single-chip microcomputers.

[0014] The models of the wireless transmitter and the wireless receiver are both ESP8266 Wi-Fi modules.

[0015] The alarm circuit includes an NPN transistor, a buzzer, and an LED lamp. The base of the NPN transistor is coupled to the output terminal of the second single-chip microcomputer, and the collector is respectively coupled to the buzzer and the LED lamp. The buzzer and the LED lamp are connected in parallel with each other.

[0016] Compared with the prior art, the gravity-sensing infusion monitoring alarm of this embodiment includes a hanging bottle device, a weight monitoring circuit module, and an alarm module. Among them, the weight monitoring circuit module is installed in the hanging bottle device and is used to monitor the weight of the infusion bottle (including the internal liquid medicine) in real time, and compare the detected weight value with a preset alarm threshold. Once it is lower than the alarm threshold, an alarm trigger signal is sent. The alarm trigger signal is sent to the alarm module through wireless communication to give an alarm reminder. Therefore, it fully shows that the technical solution of this embodiment uses a sensor to intelligently sense the weight change, improves the intelligence of infusion monitoring and alarm, and can also give a remote alarm, and the transmission of the alarm signal is more in place. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments or related technical descriptions. Obviously, the drawings described below only relate to some embodiments of the present invention and do not limit the present invention.

[0018] Figure 1 It is a structural schematic diagram of the monitoring component.

[0019] Figure 2 It is a circuit block diagram of the weight monitoring circuit module and the alarm module.

[0020] Figure 3 It is a circuit schematic diagram of the weight sensor and the signal processing circuit.

[0021] Figure 4 It is a circuit connection diagram of the key circuit, the first single-chip microcomputer, and the wireless transmitter.

[0022] Figure 5 It is a circuit connection diagram of the wireless receiver, the second single-chip microcomputer, and the alarm module.

[0023] Figure 6 This is the circuit diagram of the alarm circuit. Specific Embodiment

[0024] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the technical solution of the present invention will be further described in detail and non-restrictively below in conjunction with the accompanying drawings and specific embodiments.

[0025] The gravity-sensing infusion monitoring alarm of this embodiment includes a monitoring end and an alarm end; among them, the monitoring end is set at the infusion site, connected to the infusion bottle, and is used to monitor the infusion progress in real time, and wirelessly send an alarm trigger signal to the alarm end when the infusion progress is approaching the end; the alarm end is placed at the nurse station, and is used to wirelessly receive the alarm signal and issue an alarm reminder to remind medical staff to change the medicine or pull out the needle.

[0026] See Figure 1 , the monitoring end includes a hanging bottle device 1 for hanging on an infusion stand (conventional infusion stand, not shown in the figure), and a weight monitoring circuit module 2 for monitoring the weight of the infusion bottle (including the internal liquid medicine) in real time and sending out an alarm trigger signal. The hanging bottle device 1 includes a housing 10, an upper hook 11, a pressing plate 12 and a lower hook 13; the inside of the housing 10 is hollow, the weight monitoring circuit module 2 is installed in the housing 10, and the weight monitoring circuit module 2 includes a weight sensor 20; the upper hook 11 is fixedly installed above the housing 10 for hanging on the infusion stand; the pressing plate 12 is movably installed at the bottom inside the housing 10, and the weight sensor 20 is located between the pressing plate 12 and the bottom of the housing 10 and is subjected to the pressure of the pressing plate 12; the lower hook 13 passes through the bottom of the housing 10 and is fixedly connected to the pressing plate 12, and the lower hook 13 is used for hanging the infusion bottle (including the internal liquid medicine). Therefore, the weights of the pressing plate 12, the lower hook 13 and the infusion bottle can be detected by the weight sensor 20.

[0027] See Figure 2 , the weight monitoring circuit module 2 includes a weight sensor 20, a signal processing circuit 21, a key circuit 22, a first single-chip microcomputer 23 and a wireless transmitter 24 that are sequentially coupled. As for others, such as the power supply, it is a well-known prerequisite in the art, so it will not be elaborated in this embodiment. Among them, the weight sensor 20 is used to detect the weight of the infusion bottle in real time and output a weight sensing signal; the signal processing circuit 21 is used to amplify the weight sensing signal and perform front and rear stage isolation; the key circuit 22 is used to input the lowest alarm weight value (i.e., the threshold) to the first single-chip microcomputer 23; the first single-chip microcomputer 23 receives the weight sensing signal and the threshold, and compares the numerical values of the weight sensing signal and the threshold, and issues an alarm trigger signal when the weight sensing signal value is less than the threshold; the wireless transmitter 24 is used to wirelessly send the alarm trigger signal.

[0028] The alarm terminal is the alarm module 4, which includes a wireless receiver 40, a second single-chip microcomputer 41, and an alarm circuit 42. Its overall structure is generally a circuit board structure. The technical core lies in the circuit structure, not the packaging structure. Among them, the wireless receiver 40 communicates wirelessly with the wireless transmitter 24, is used to receive wireless signals, and transfers them to the second single-chip microcomputer 41 after decoding and conversion; the second single-chip microcomputer 41 is used to issue an alarm control signal; the alarm circuit 42 is used to emit sound and flashing light alarms.

[0029] See Figure 3 , the weight sensor is a resistance strain gauge type pressure sensor IC1. This pressure sensor IC1 consists of four resistance strain gauges to form a Wheatstone bridge, which can convert gravity into a weight sensing signal (analog electrical signal) for output.

[0030] The signal processing circuit includes a differential amplifier circuit and a voltage follower circuit. Among them,

[0031] The differential amplifier circuit includes a first operational amplifier U1, a second operational amplifier U2, a third operational amplifier U3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, and a resistor R7. In this embodiment, the models of the first operational amplifier U1, the second operational amplifier U2, and the third operational amplifier U3 are all AD8629 type operational amplifiers. The resistors R1, R2, and R3 are all ordinary resistors with a resistance value of 50KΩ. The resistors R4, R5, R6, and R7 are all ordinary resistors with a resistance value of 150KΩ. When connecting, the non-inverting input terminals of the first operational amplifier U1 and the second operational amplifier U2 are coupled to the output terminal of the pressure sensor IC1. The resistor R1 is coupled between the inverting input terminal of the first operational amplifier U1 and the inverting input terminal of the second operational amplifier U2. The resistor R2 is coupled between the inverting input terminal of the first operational amplifier U1 and its output terminal. The resistor R3 is coupled between the inverting input terminal of the second operational amplifier U2 and its output terminal. The resistor R4 is coupled between the output terminal of the first operational amplifier U1 and the non-inverting input terminal of the third operational amplifier U3. The resistor R5 is coupled between the output terminal of the second operational amplifier U2 and the inverting input terminal of the third operational amplifier U3. The resistor R6 is coupled between the non-inverting input terminal of the third operational amplifier U3 and the ground. The resistor R7 is coupled between the inverting input terminal of the third operational amplifier U3 and its output terminal. The differential amplifier circuit of this embodiment can provide a stable excitation voltage for the measurement bridge and high common-mode voltage rejection (CMR) for accurately measuring the weight sensor signal, eliminating any common-mode voltage. By designing the 7 peripheral resistors, it can provide low-value input offset voltage (VOS) drift and input bias current for the 3 operational amplifiers, so as to enable accurate reading from the pressure sensor IC1. The differential amplifier circuit is used to amplify the weight sensing signal.

[0032] The voltage follower is the fourth operational amplifier U4, and its model is the OP07 operational amplifier. When connecting, the non-inverting input terminal of the fourth operational amplifier U4 is coupled to the output terminal of the third operational amplifier U3, the inverting input terminal of the fourth operational amplifier U4 is coupled to its own output terminal, and at the same time its own output terminal is also coupled to the input terminal (P1.0 port) of the first single-chip microcomputer U5. The voltage follower is mainly used to isolate the differential amplifier circuit and the first single-chip microcomputer U5 at the front and rear stages, and transfer the sensing signal to the first single-chip microcomputer U5.

[0033] See Figure 4 , the key circuit has 4 keys, namely K1, M, K3 and K4. These four keys are connected in parallel with each other and are respectively coupled to the P0.0 - P0.3 ports of the first single-chip microcomputer U5 for inputting the alarm threshold. In this embodiment, according to the common weight of the infusion bottle, K1, M, K3 and K4 respectively represent 200 grams, 100 grams, 50 grams and 10 grams. That is, for example, the weight of a 500ml infusion bottle glass bottle is 250 grams. We can click the K1 key, K3 key and K4 key, and the first single-chip microcomputer U5 is triggered by the key signal to input the threshold value of 260 grams (where 10 grams is the error value).

[0034] The model of the first single-chip microcomputer U5 is the 89C52 single-chip microcomputer, which is mainly used for data conversion and processing. The first single-chip microcomputer U5 needs to perform weight zeroing settings when the lower hook 13 is empty. The model of the wireless transmitter U6 is the ESP8266 Wi-Fi module, which is coupled to the first single-chip microcomputer U5 through the serial port. This wireless transmitter U6 wirelessly transmits the signal based on the Wi-Fi protocol.

[0035] See Figure 5 , the model of the wireless receiver U7 is the ESP8266 Wi-Fi module, which is coupled to the second single-chip microcomputer U8 through the serial port. This wireless transmitter U7 receives the wireless signal sent by the wireless transmitter U6 based on the Wi-Fi protocol, and forwards it to the second single-chip microcomputer U8 after decoding. The ESP8266 Wi-Fi module can be one-to-many, that is, one receiving module can correspond to multiple (up to 5) transmitting modules. Therefore, one alarm terminal can be responsible for the alarm work of up to 5 monitoring terminals.

[0036] The model of the second single-chip microcomputer U8 is the 89C52 single-chip microcomputer, which is mainly used for receiving the alarm trigger signal and sending the alarm control signal.

[0037] See Figure 6, the alarm module U9 includes an NPN transistor Q1, a buzzer K1, and an LED light M. The model of the NPN transistor Q1 is 8050. Its base is coupled to the output terminal (P0.0) of the second single-chip microcomputer U8, the emitter is grounded, and the collector is respectively coupled to the buzzer K1 and the LED light M. Moreover, the buzzer K1 and the LED light M are connected in parallel with each other, and the buzzer K1 and the LED light M are also coupled to the power supply (5V DC). Controlled by the first single-chip microcomputer U8, the NPN transistor Q1 conducts, the buzzer K1 and the LED light M are powered on, and sound and flash alarms are issued.

[0038] The working process of the gravity-sensing infusion monitoring alarm in this embodiment is as follows: Hang the hanging bottle device on the infusion stand, start the power supply, and the weight monitoring circuit module powers on and resets. Hang the infusion bottle on the hanging bottle device, input the alarm threshold through the key circuit, and start the infusion. When the infusion is almost over, the weight value monitored by the weight sensor is less than the alarm threshold input by the key circuit. The first single-chip microcomputer sends an alarm trigger signal to the alarm module through the wireless transmitter. After the wireless receiver of the alarm module receives the alarm trigger signal, it forwards it to the second single-chip microcomputer. The second single-chip microcomputer sends an alarm control signal to the corresponding numbered alarm circuit according to the numbered information in the alarm trigger signal, and the alarm circuit issues a sound and light alarm reminder under control. Medical staff go to change the medicine or pull out the needle according to the alarm reminder information.

[0039] It should be noted that the above-mentioned preferred embodiment is only to illustrate the technical concept and features of the present invention, and its purpose is to enable those familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A gravity-sensing infusion monitoring alarm, characterized in that: It includes an infusion bottle hanger, a weight monitoring circuit module installed inside the infusion bottle hanger, and an alarm module that communicates remotely with the weight monitoring circuit module; among them, the infusion bottle hanger includes a housing, an upper hook installed above the housing, a pressing plate movably installed inside the housing, and a lower hook connected to the pressing plate and extending below the housing for hanging an infusion bottle; the weight monitoring circuit module includes a weight sensor, a signal processing circuit, a key circuit, a first single-chip microcomputer, and a wireless transmitter, where the weight sensor is installed between the pressing plate and the bottom of the housing for detecting the weight of the infusion bottle and outputting a weight sensing signal; the signal processing circuit is coupled between the weight sensor and the first single-chip microcomputer for amplifying the weight sensing signal and isolating the front and rear stages; the key circuit is coupled to the first single-chip microcomputer for inputting an alarm threshold; the input terminals of the first single-chip microcomputer respectively input the weight sensing signal and the alarm threshold, and the output terminal outputs an alarm trigger signal; the wireless transmitter is coupled to the first single-chip microcomputer and wirelessly communicates with the alarm module for wirelessly sending the alarm trigger signal to the alarm module.

2. The gravity-sensing infusion monitoring alarm according to claim 1, wherein: the alarm module includes a wireless receiver, a second single-chip microcomputer, and an alarm circuit, where the wireless receiver wirelessly communicates with the wireless transmitter and is also coupled to the second single-chip microcomputer for wirelessly receiving the alarm trigger signal and forwarding it to the second single-chip microcomputer; the output terminal of the second single-chip microcomputer is coupled to the alarm circuit and outputs an alarm control signal to the alarm circuit; the alarm circuit is used to emit a sound and light alarm.

3. The gravity-sensing infusion monitoring alarm according to claim 1, wherein: the weight sensor is a resistance strain gauge pressure sensor.

4. The gravity-sensing infusion monitoring alarm according to claim 1, wherein: the signal processing circuit includes: a differential amplifier circuit coupled to the weight sensor for amplifying the signal, and a voltage follower coupled to the differential amplifier circuit for isolating the front and rear stages; among them, the differential amplifier circuit includes a first operational amplifier, a second operational amplifier, a third operational amplifier, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, and resistor R7. The non-inverting input terminals of the first operational amplifier and the second operational amplifier are coupled to the weight sensor. Resistor R1 is coupled between the inverting input terminal of the first operational amplifier and the inverting input terminal of the second operational amplifier. Resistor R2 is coupled between the inverting input terminal of the first operational amplifier and its output terminal. Resistor R3 is coupled between the inverting input terminal of the second operational amplifier and its output terminal. Resistor R4 is coupled between the output terminal of the first operational amplifier and the non-inverting input terminal of the third operational amplifier. Resistor R5 is coupled between the output terminal of the second operational amplifier and the inverting input terminal of the third operational amplifier. Resistor R6 is coupled between the non-inverting input terminal of the third operational amplifier and the ground. Resistor R7 is coupled between the inverting input terminal of the third operational amplifier and its output terminal.

5. The gravity-sensing infusion monitoring alarm according to claim 4, wherein: The models of the first operational amplifier, the second operational amplifier, and the third operational amplifier are all AD8629 type operational amplifiers.

6. The gravity-sensing infusion monitoring alarm according to claim 4, wherein: The model of the voltage follower is OP07 type operational amplifier.

7. The gravity-sensing infusion monitoring alarm according to claim 1, wherein: The first single-chip microcomputer and the first single-chip microcomputer are 89C51 type single-chip microcomputers.

8. The gravity-sensing infusion monitoring alarm according to claim 2, wherein: The models of the wireless transmitter and the wireless receiver are both ESP8266 type Wi-Fi modules.

9. The gravity-sensing infusion monitoring alarm according to claim 1, wherein: The alarm module includes an NPN-type triode, a buzzer, and an LED lamp. The base of the NPN-type triode is coupled to the output terminal of the second single-chip microcomputer, and the collector is respectively coupled to the buzzer and the LED lamp. The buzzer and the LED lamp are connected in parallel with each other.

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