CN107684412B - Miniaturized upper gastrointestinal dynamic pH impedance monitoring device - Google Patents
Miniaturized upper gastrointestinal dynamic pH impedance monitoring device Download PDFInfo
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- CN107684412B CN107684412B CN201710938811.XA CN201710938811A CN107684412B CN 107684412 B CN107684412 B CN 107684412B CN 201710938811 A CN201710938811 A CN 201710938811A CN 107684412 B CN107684412 B CN 107684412B
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 16
- 230000002496 gastric effect Effects 0.000 title claims description 11
- 210000002105 tongue Anatomy 0.000 claims description 23
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 3
- 238000010295 mobile communication Methods 0.000 claims description 3
- 210000002438 upper gastrointestinal tract Anatomy 0.000 abstract description 5
- 238000002847 impedance measurement Methods 0.000 abstract description 2
- 210000003128 head Anatomy 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 210000003238 esophagus Anatomy 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 208000021302 gastroesophageal reflux disease Diseases 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000003928 nasal cavity Anatomy 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/42—Detecting, measuring or recording for evaluating the gastrointestinal, the endocrine or the exocrine systems
- A61B5/4222—Evaluating particular parts, e.g. particular organs
- A61B5/4233—Evaluating particular parts, e.g. particular organs oesophagus
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0538—Measuring electrical impedance or conductance of a portion of the body invasively, e.g. using a catheter
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6867—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive specially adapted to be attached or implanted in a specific body part
- A61B5/687—Oesophagus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- Veterinary Medicine (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Physiology (AREA)
- Endocrinology (AREA)
- Gastroenterology & Hepatology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a miniaturized upper gastrointestinal tract dynamic pH impedance monitoring device which comprises a pH impedance sensing electrode, a medical catheter, a pH impedance recorder and a background terminal. The pH impedance sensing electrode is arranged at the front end inside the medical catheter and is connected with the pH impedance recorder through a lead arranged inside the medical catheter. The pH impedance recorder is internally provided with a collection front-end circuit, a controller, a wireless transceiver module and a power management module. The power management module includes a power management chip LTC4413, a main power battery BT1, and a backup battery BT2, where the power management chip LTC4413 selects the high voltage one of the main power battery BT1 and the backup battery BT2 to provide power to the load. The invention adopts a battery hot plug mode to ensure that the equipment keeps working for a long time, gets rid of the limitation of battery electric quantity and equipment power consumption, and realizes uninterrupted pH impedance measurement, thereby more miniaturizing products and battery sizes and more optimizing the wearing feeling of a wearer.
Description
Technical Field
The invention relates to a miniaturized upper gastrointestinal tract dynamic pH impedance monitoring device.
Background
At present, the 24-hour pH impedance combined detection becomes a standard detection scheme for diagnosing gastroesophageal reflux disease. The catheter carrying the pH sensor and the impedance electrode is inserted into the esophagus through the nasal cavity of a human body, and the other end of the catheter is connected with the collector. Due to the need for accurate diagnosis, data acquisition on the one hand requires a relatively high sampling frequency and data recording on the other hand requires at least 24 hours. In addition, the data acquisition instrument needs to be carried with the user and affects the daily life of the wearer as little as possible. These requirements have led us to pursue products that are both compact and low power consumption. At present, a plurality of pH impedance combined detection devices use a No. 5 battery, and continuous operation for 24 hours is ensured by reducing power consumption. The single battery ensures that 24 hours of sampling can meet the basic requirement of 24 hours of pH-impedance detection, but has the following defects that the requirement of low power consumption limits the freedom degree of signal acquisition to a certain extent: such as the sampling rate and the characteristic frequency of the acquired impedance. The use of dry cells limits further miniaturization of the product, thereby affecting the comfort of the wearer to some extent. Third, the standby time of 1-2 days for a single cell limits the time for continuous recording of pH impedance.
Disclosure of Invention
The invention aims to provide a miniaturized upper gastrointestinal tract dynamic pH impedance monitoring device with smaller size and better sampling continuity.
The technical scheme for realizing the aim of the invention is as follows: a miniaturized upper gastrointestinal tract dynamic pH impedance monitoring device comprises a pH impedance sensing electrode, a medical catheter, a pH impedance recorder and a background terminal.
The pH impedance sensing electrode is arranged at the front end inside the medical catheter and is connected with the pH impedance recorder through a lead arranged inside the medical catheter; a circuit device is arranged in the pH impedance recorder, and the circuit device comprises a power management module; the power management module comprises a power management chip, a main power battery BT1 and a backup battery BT2, wherein the main power battery BT1 and the backup battery BT2 are electrically connected with the power management chip; when the main power battery BT1 and the backup battery BT2 are connected to the power management chip at the same time, the power management chip selects the party with high voltage in the main power battery BT1 and the backup battery BT2 to provide power for the load; the pH impedance recorder comprises a main body with a box-shaped structure, and battery bins for embedding batteries are respectively arranged on two sides of the main body; the main body is internally provided with a battery locking mechanism, and the battery locking mechanism can be used for switchably locking any one battery among the main power battery BT1 and the backup battery BT 2.
The battery lock comprises a locking piece with a U-shaped structure projected from the left side and the right side, wherein the locking piece comprises clamping strips at two ends and a connecting strip for connecting the clamping strips at two ends, and a rack structure is arranged on the lower end face of the connecting strip. And the upper end surface of the locking piece is fixedly connected with a sliding switch. The upper side shell of the main body is provided with a sliding groove extending forwards and backwards. The battery lock is connected in the sliding groove on the shell on the upper side of the main body in a sliding way through the sliding switch.
The safety blocks are respectively arranged at the outer side positions of the front end and the rear end of the battery lock, each safety block comprises a transversely arranged clamping block and a longitudinally arranged jacking block, the upper ends of the clamping blocks are provided with bayonets which are matched and connected with clamping strips of the battery lock, and the bayonets on the safety blocks at the two ends are respectively arranged at the left side and the right side. The safety block is movable in the body in the left-right direction.
The pair of return springs are respectively arranged at the left side and the right side of the safety blocks at the two ends, and the return springs and the upper bayonet of the safety block at each end are arranged at different sides. One end of the reset spring is fixed on the shell inside the main body, and the other end of the reset spring is fixed on the safety block.
The carousel sets up in the below of battery lock, including rectangular plate formula structure's fixed plate and set up the gear on the arbitrary side about the fixed plate, the gear meshes with the rack structure on the connecting strip lower terminal surface of battery lock. The fixed plate is rotatably connected inside the main body.
The battery spring bolt includes the spring bolt connecting strip of fixed connection on the lower terminal surface of carousel fixed plate, and the front and back both ends of spring bolt connecting strip outwards extend and outstanding on the front and back terminal surface of fixed plate. And the upper end surfaces of the front end and the rear end of the lock tongue connecting strip are respectively provided with lock tongues.
The battery connector socket is arranged towards the left side and the right side of the main body, and is connected with an internal power supply circuit. The battery bin is provided with a battery bin socket on the shell at the position of the battery connector socket.
And a battery connector male head which is connected with a battery connector socket in the main body in a matched manner is arranged on one side of the battery matched with the battery bin. When the battery is embedded into the battery compartment, the battery connector male head penetrates through the battery compartment socket to be connected with the battery connector socket in the main body in a matched mode, and the battery connector male head props against the safety block to enable the safety block to move towards the battery installation direction. And a locking groove which is matched and connected with a lock tongue on the battery lock tongue is formed in the lower end face of the male head of the battery connector.
In the battery lock, the sliding switch is of an I-shaped structure, and the sliding switch is embedded in the middle of the I-shaped structure and is connected in a sliding groove on the shell on the upper side of the main body in a sliding manner.
The battery lock includes a pair of slide switches therein. The pair of sliding switches are respectively fixed at the upper ends of the clamping strips at the two ends of the locking piece.
In the locking piece, the plane projection of the connecting strip is of an L-shaped structure, and clamping strips at two ends of the connecting strip are staggered in the front-back direction.
The safety block is provided with a spring hole which is connected with a return spring in a matched mode, and the return spring is fixedly arranged in the spring hole.
The battery compartment is flush with the side surfaces of the two sides of the main body.
The pH impedance recorder is internally provided with an acquisition front-end circuit, a controller, a wireless transceiver module and a power management module; the acquisition front-end circuit transmits signals detected by the pH impedance sensing electrode to the controller, and the signals are transmitted to the background terminal through the wireless transceiver module after being processed by the controller; the power management module comprises a power management chip LTC4413, a main power battery BT1 connected with an INA pin of the power management chip LTC4413, and a backup battery BT2 connected with an INB pin of the power management chip LTC4413, wherein the power management chip LTC4413 selects one of the main power battery BT1 and the backup battery BT2 with high voltage to provide power for a load.
The positive electrode of the main power battery BT1 is connected with the D electrode of the PMOS tube Q1, and the negative electrode of the main power battery BT1 is grounded; the D pole of the PMOS tube Q1 is connected with the positive pole of the main power battery BT1, the S pole is connected with the INA pin of the power management chip LTC4413, and the G pole is grounded; one end of the TVS diode D1 is connected between the positive electrode of the main power battery BT1 and the D electrode of the PMOS tube Q1, and the other end of the TVS diode D1 is grounded; the OUTA pin of the power management chip LTC4413 is grounded through a capacitor C2.
The positive electrode of the backup battery BT2 is connected with the D electrode of the PMOS tube Q2, and the negative electrode of the backup battery BT2 is grounded. The D pole of the PMOS tube Q2 is connected with the positive pole of the backup battery BT2, the S pole is connected with the INB pin of the power management chip LTC4413, and the G pole is grounded. One end of the TVS diode D2 is connected between the positive electrode of the backup battery BT2 and the D electrode of the PMOS tube Q2, and the other end of the TVS diode D2 is grounded. The INB pin of the power management chip LTC4413 is grounded through a capacitor C1, and the OUTB pin is grounded through a capacitor C2.
The power management module further comprises an indicating circuit, the indicating circuit comprises a resistor R1, a resistor R2 and a light-emitting diode (LED) 1, wherein one end of the resistor R1 and one end of the light-emitting diode (LED) 1 are connected in series and then connected with the S pole of the PMOS tube Q2, and the other end of the resistor R1 and one end of the light-emitting diode are connected with the STAT pin of the power management chip LTC 4413. And two ends of the resistor R2 are connected between a STAT pin and an OUTA pin of the power management chip LTC 4413.
The background terminal is a PC or mobile communication equipment with a wireless receiver.
By adopting the technical scheme, the invention has the following beneficial effects: (1) The invention adopts a battery hot plug mode to ensure that the equipment keeps working for a long time, gets rid of the limitation of battery electric quantity and equipment power consumption, and realizes uninterrupted pH impedance measurement, thereby more miniaturizing products and battery sizes and more optimizing the wearing feeling of a wearer.
(2) The invention adopts wireless communication to realize the control of the equipment by the wireless terminal. The pH products on the market are basically provided with a liquid crystal screen and keys, and the equipment omits the hardware and is operated by a wireless control terminal, so that the volume of the equipment is saved.
(3) The battery hot plug has a prompt function on the circuit design to prompt a user whether the battery can be replaced in the current state, and meanwhile, the old battery can be detached only under the condition that a new battery is connected through the matching of the locking piece on the mechanism design, so that the battery power supply safety is improved, and the use safety and the monitoring stability are better.
(4) The battery has a protection function when in switching, and prevents the damage to the equipment caused by the surge and impact generated by the battery switching.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which
Fig. 1 is a schematic block diagram of a pH impedance recorder according to the present invention.
Fig. 2 is a schematic structural diagram of a pH impedance recorder according to the present invention.
Fig. 3 is a schematic diagram of the explosive structure of fig. 2.
Fig. 4 is a schematic view of the battery structure of fig. 3.
Fig. 5 is a schematic view of the battery lock mechanism in fig. 3.
Fig. 6 is a schematic view of the battery lock structure of fig. 5.
Fig. 7 is a schematic view of the safety block structure in fig. 5.
Fig. 8 is a schematic diagram of the turret and battery tongue mating of fig. 5.
Fig. 9 is a circuit diagram of the power management module of fig. 1.
Detailed Description
Example 1
As shown in fig. 1, the miniaturized upper gastrointestinal tract dynamic pH impedance monitoring device of the present embodiment includes a pH impedance sensing electrode 1, a medical catheter 2, a pH impedance recorder 3, and a background terminal 4. The background terminal 4 is a PC or mobile communication device with a wireless receiver. The pH impedance sensing electrode 1 is arranged at the front end inside the medical catheter 2, and the pH impedance sensing electrode 1 is connected with the pH impedance recorder 3 through a lead 5 arranged inside the medical catheter 2.
Fig. 2 to 7 are schematic structural diagrams of the pH impedance recorder. The pH impedance recorder 3 comprises a main body 3-1 with a box-shaped structure, and battery bins 3-3 for embedding batteries 3-2 are respectively arranged on two sides of the main body 3-1. The main body 3-1 is internally provided with a battery lock mechanism 3-4, and the battery lock mechanism 3-4 comprises a battery lock 3-4-1, a pair of safety blocks 3-4-2 arranged at the front end and the rear end of the battery lock 3-4-1, a pair of reset springs 3-4-3, a rotary disc 3-4-4, a battery lock tongue 3-4-5 and a pair of battery connector sockets 3-4-6.
The battery lock 3-4-1 comprises a locking piece with a U-shaped structure projected from the left side and the right side, the locking piece comprises clamping strips 3-4-1-1 at two ends and connecting strips 3-4-1-2 for connecting the clamping strips 3-4-1-1 at two ends, and a rack structure 3-4-1-3 is arranged on the lower end face of the connecting strips 3-4-1-2. The plane projection of the connecting strip 3-4-1-2 is of an L-shaped structure, and the clamping strips 3-4-1-1 at the two ends of the connecting strip 3-4-1-2 are staggered in the front-back direction. The upper end surface of the locking piece is fixedly connected with a sliding switch 3-4-1-4. The upper shell of the main body 3-1 is provided with a sliding groove extending back and forth. The battery lock 3-4-1 is slidably connected in a sliding groove on the upper side housing of the main body 3-1 through the sliding switch 3-4-1-4. The sliding switch 3-4-1-4 is of an I-shaped structure, and is embedded in the middle of the I-shaped structure and is connected in a sliding groove on the shell on the upper side of the main body 3-1 in a sliding way. The battery lock 3-4-1 includes a pair of slide switches 3-4-1-4 therein. A pair of slide switches 3-4-1-4 are respectively fixed at the upper ends of the clamping strips 3-4-1-1 at the two ends of the locking piece.
The pair of safety blocks 3-4-2 are respectively arranged at the outer side positions of the front end and the rear end of the battery lock 3-4-1, the safety blocks 3-4-2 comprise clamping blocks 3-4-2-1 which are transversely arranged and top blocks 3-4-2-2 which are longitudinally arranged, bayonets 3-4-2-3 which are matched and connected with clamping strips 3-4-1-1 of the battery lock 3-4-1 are arranged at the upper ends of the clamping blocks 3-4-2, and bayonets 3-4-2-3 on the safety blocks 3-4-2 at the two ends are respectively arranged at the left side and the right side. The safety block 3-4-2 is movable in the left-right direction within the main body 3-1.
The pair of return springs 3-4-3 are respectively arranged at the left side and the right side of the safety blocks 3-4-2 at the two ends, and the return springs 3-4-3 are arranged at different sides with the bayonets 3-4-2-3 on the safety blocks 3-4-2 at each end. One end of a reset spring 3-4-3 is fixed on the inner shell of the main body 3-1, and the other end is fixed on the safety block 3-4-2. The safety block 3-4-2 is provided with a spring hole 3-4-2-4 which is matched and connected with the return spring 3-4-3, and the return spring 3-4-3 is fixedly arranged in the spring hole 3-4-2-4.
The turntable 3-4-4 is arranged below the battery lock 3-4-1 and comprises a fixing plate 3-4-4-1 with a rectangular plate structure and gears 3-4-4-2 arranged on any side of the fixing plate 3-4-4-1, wherein the gears 3-4-4-2 are meshed with a rack structure 3-4-1-3 on the lower end face of a connecting strip 3-4-1-2 of the battery lock 3-4-1. The fixing plate 3-4-4-1 is rotatably coupled inside the main body 3-1.
The battery lock tongue 3-4-5 comprises a lock tongue connecting strip 3-4-5-1 fixedly connected to the lower end face of a fixed plate 3-4-4-1 of the rotary disc 3-4-4, and the front end and the rear end of the lock tongue connecting strip 3-4-5-1 extend outwards and protrude out of the front end face and the rear end face of the fixed plate 3-4-4-1. The upper end surfaces of the front end and the rear end of the lock tongue connecting strip 3-4-5-1 are respectively provided with lock tongues 3-4-5-2.
The battery connector sockets 3-4-6 are provided toward the left and right sides of the main body 3-1, and the battery connector sockets 3-4-6 are connected to an internal power supply circuit. The battery bin 3-3 is provided with a battery bin socket 3-3-1 on the shell at the position of the battery connector socket 3-4-6.
The side of the battery 3-2 matched with the battery compartment 3-3 is provided with a battery connector male 3-2-1 matched and connected with a battery connector socket 3-4-6 in the main body 3-1. When the battery 3-2 is embedded in the battery compartment 3-3, the battery connector male head 3-2-1 passes through the battery compartment jack 3-3-1 to be connected with the battery connector jack 3-4-6 in the main body 3-1 in a matched manner, and the battery connector male head 3-2-1 props against the safety block 3-4-2 to enable the safety block to move towards the installation direction of the battery 3-2. The lower end face of the male head 3-2-1 of the battery connector is provided with a locking groove 3-2-1-1 which is matched and connected with the locking tongue 3-4-5-2 on the battery locking tongue 3-4-5. The battery compartment 3-3 is flush with both side surfaces of the main body 3-1.
Hot plug operation description: assuming that the right battery 3-2 is in a working state, the left battery 3-2 is pressed into the battery compartment 3-3, the battery connector male 3-2-1 on the battery 3-2 is inserted into the battery connector socket 3-4-6 in the main body 3-1, and the power management module 6-1 of the circuit device 6 decides whether to prompt the user to switch the battery according to the electric quantity of the two batteries. When the male end 3-2-1 of the battery connector is inserted into the socket 3-4-6 of the battery connector, the male end 3-2-1 of the battery connector presses the safety block 3-4-2 at the rear side to the right, the safety block 3-4-2 moves rightwards under the contraction of the return spring 3-4-3, so that the clamping strip 3-4-1-1 of the battery lock 3-4-1 moves out of the bayonet 3-4-2-3 on the safety block 3-4-2, and the clamping strip 3-4-1-1 of the battery lock 3-4-1 at the right is not in the bayonet 3-4-2-3 because the battery 3-2 at the right is already embedded in the battery compartment 3-3 at the right, so the sliding switch 3-4-1-4 can push the switch battery, push the sliding switch 3-4-1-4 towards the front side, the gear 3-4-4-2 on the rotary disc 3-4-4 rotates clockwise under the drive of the rack structure 3-4-1-3 on the battery lock 3-4-1, the lock tongue 3-4-5-2 on the rear side of the lock tongue connecting strip 3-4-5-1 is lifted upwards until being clamped into the locking groove 3-2-1 on the lower end surface of the male head 3-2-1 of the battery 3-2 battery connector, at the moment, the user can take down the right battery 3-2, after the battery 3-2 is taken out, the right safety block 3-4-2 moves rightwards under the action of the reset spring 3-4-3, the bayonet 3-4-2-3 on the safety block 3-4-2 is clamped on the clamping strip 3-4-1-1 of the right battery lock 3-4-1 to lock the battery lock 3-4-1.
As shown in fig. 1, a circuit device 6 is provided in the pH impedance recorder 3. The circuit device comprises a collection front-end circuit 6-2, a controller 6-3, a wireless transceiver module 6-4 and a power management module 6-1. The acquisition front-end circuit 6-2 transmits signals detected by the pH impedance sensing electrode 1 to the controller 6-3, and the signals are transmitted to the background terminal 4 through the wireless transceiver module 6-4 after being processed by the controller 6-3. The power management module 6-1 includes a power management chip LTC4413, a main power battery BT1 connected to an INA pin of the power management chip LTC4413, and a backup battery BT2 connected to an INB pin of the power management chip LTC4413, and the power management chip LTC4413 selects the higher voltage of the main power battery BT1 and the backup battery BT2 to supply power to the load.
As shown in fig. 8, the positive electrode of the main power battery BT1 is connected to the D electrode of the PMOS transistor Q1, and the negative electrode of the main power battery BT1 is grounded. The D pole of the PMOS tube Q1 is connected with the positive pole of the main power battery BT1, the S pole is connected with the INA pin of the power management chip LTC4413, and the G pole is grounded. One end of the TVS diode D1 is connected between the positive electrode of the main power battery BT1 and the D electrode of the PMOS tube Q1, and the other end of the TVS diode D1 is grounded. The OUTA pin of the power management chip LTC4413 is grounded through a capacitor C2.
The positive electrode of the backup battery BT2 is connected with the D electrode of the PMOS tube Q2, and the negative electrode of the backup battery BT2 is grounded. The D pole of the PMOS tube Q2 is connected with the positive pole of the backup battery BT2, the S pole is connected with the INB pin of the power management chip LTC4413, and the G pole is grounded. One end of the TVS diode D2 is connected between the positive electrode of the backup battery BT2 and the D electrode of the PMOS tube Q2, and the other end of the TVS diode D2 is grounded. The INB pin of the power management chip LTC4413 is grounded through a capacitor C1, and the OUTB pin is grounded through a capacitor C2.
The power management module 3-4 further comprises an indication circuit, wherein the indication circuit comprises a resistor R1, a resistor R2 and a Light Emitting Diode (LED) 1, one end of the resistor R1 and the Light Emitting Diode (LED) 1 are connected in series and then connected with the S pole of the PMOS tube Q2, and the other end of the resistor R1 and the light emitting diode is connected with the STAT pin of the power management chip LTC 4413. And two ends of the resistor R2 are connected between the STAT pin and the OUTA pin of the power management chip LTC 4413.
When the circuit device is connected, the power management chip LTC4413 connects the load to the main power battery BT1 when the circuit is not connected to the backup battery BT 2. At this time, the STAT pin voltage is at a high level, and the indicator light will not be on. If a fully charged backup power battery BT2 is connected when the main power battery BT1 is low and is about to run out, the load voltage will rise as the ideal diode connected between the INB pin and the OUTB pin is turned on. The newly connected backup power battery BT2 voltage exceeds the main power battery BT1 voltage, and the main power battery BT1 will be immediately disconnected from the load. And, STAT pin voltage drops, thereby making the pilot lamp lighten, to indicate that it is safe to remove main power battery BT1.
When the backup power battery BT2 operates for a long time, the electric quantity and voltage are inevitably reduced. At this time, the main power supply terminal is connected to a new battery or a fully charged battery BT1, and the backup power supply battery BT2 is disconnected from the load immediately. The STAT pin voltage increases, and the indicator light turns off, indicating that it is safe to remove the backup power battery BT 2.
When the battery is switched, the state of the LED1 changes, which indicates that the user can safely replace the battery.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (9)
1. The utility model provides a miniaturized upper gastrointestinal dynamic pH impedance monitoring device which characterized in that: comprises a pH impedance sensing electrode (1), a medical catheter (2), a pH impedance recorder (3) and a background terminal (4);
the pH impedance sensing electrode (1) is arranged at the front end inside the medical catheter (2), and the pH impedance sensing electrode (1) is connected with the pH impedance recorder (3) through a lead (5) arranged in the medical catheter (2);
a circuit device (6) is arranged in the pH impedance recorder (3), and the circuit device (6) comprises a power management module (6-1); the power management module (6-1) comprises a power management chip, a main power battery BT1 and a backup battery BT2 which are electrically connected with the power management chip; when the main power battery BT1 and the backup battery BT2 are connected to the power management chip at the same time, the power management chip selects the party with high voltage in the main power battery BT1 and the backup battery BT2 to provide power for the load;
the pH impedance recorder (3) comprises a main body (3-1) with a box-shaped structure, and battery bins (3-3) for embedding batteries (3-2) are respectively arranged at two sides of the main body (3-1); a battery lock mechanism (3-4) is arranged in the main body (3-1), and the battery lock mechanism (3-4) can be used for switchably locking any battery (3-2) of the main power battery BT1 and the backup battery BT2;
the battery lock mechanism (3-4) comprises a battery lock (3-4-1), a pair of safety blocks (3-4-2) arranged at the front end and the rear end of the battery lock (3-4-1), a pair of reset springs (3-4-3), a rotary disc (3-4-4), a battery lock tongue (3-4-5) and a pair of battery connector sockets (3-4-6);
the battery lock (3-4-1) comprises a locking piece with a U-shaped structure projected from the left side and the right side, the locking piece comprises clamping strips (3-4-1-1) at two ends and connecting strips (3-4-1-2) for connecting the clamping strips (3-4-1-1) at two ends, and a rack structure (3-4-1-3) is arranged on the lower end face of the connecting strips (3-4-1-2); the upper end surface of the locking piece is fixedly connected with a sliding switch (3-4-1-4); the upper side shell of the main body (3-1) is provided with a sliding groove extending forwards and backwards; the battery lock (3-4-1) is connected in a sliding groove on the upper side shell of the main body (3-1) in a sliding way through the sliding switch (3-4-1-4);
the pair of safety blocks (3-4-2) are respectively arranged at the outer side positions of the front end and the rear end of the battery lock (3-4-1), the safety blocks (3-4-2) comprise transversely arranged clamping blocks (3-4-2-1) and longitudinally arranged jacking blocks (3-4-2-2), bayonets (3-4-2-3) which are matched and connected with clamping strips (3-4-1-1) of the battery lock (3-4-1) are arranged at the upper ends of the clamping blocks (3-4-2-1), and bayonets (3-4-2-3) on the safety blocks (3-4-2) at the two ends are respectively arranged at the left side and the right side; the safety block (3-4-2) can move in the left-right direction in the main body (3-1);
the pair of return springs (3-4-3) are respectively arranged at the left side and the right side of the safety blocks (3-4-2) at the two ends, and the return springs (3-4-3) and the upper bayonets (3-4-2-3) of the safety blocks (3-4-2) at each end are arranged at different sides; one end of the reset spring (3-4-3) is fixed on the inner shell of the main body (3-1), and the other end of the reset spring is fixed on the safety block (3-4-2);
the turntable (3-4-4) is arranged below the battery lock (3-4-1) and comprises a fixed plate (3-4-4-1) with a rectangular plate structure and gears (3-4-4-2) arranged on left and right sides of the fixed plate (3-4-4-1), wherein the gears (3-4-4-2) are meshed with rack structures (3-4-1-3) on the lower end surfaces of connecting strips (3-4-1-2) of the battery lock (3-4-1); the fixing plate (3-4-4-1) is rotatably connected inside the main body (3-1);
the battery lock tongue (3-4-5) comprises a lock tongue connecting strip (3-4-5-1) fixedly connected to the lower end surface of a fixed plate (3-4-4-1) of the rotary table (3-4-4), and the front end and the rear end of the lock tongue connecting strip (3-4-5-1) extend outwards and protrude out of the front end surface and the rear end surface of the fixed plate (3-4-4-1); the upper end surfaces of the front end and the rear end of the lock tongue connecting strip (3-4-5-1) are respectively provided with lock tongues (3-4-5-2);
the battery connector sockets (3-4-6) are arranged towards the left side and the right side of the main body (3-1), and the battery connector sockets (3-4-6) are connected with an internal power supply circuit; the battery bin (3-3) is provided with a battery bin socket (3-3-1) on the shell at the position of the battery connector socket (3-4-6);
a battery connector male head (3-2-1) which is in fit connection with a battery connector socket (3-4-6) in the main body (3-1) is arranged on one side of the battery (3-2) matched with the battery bin (3-3); when the battery (3-2) is embedded into the battery compartment (3-3), the battery connector male head (3-2-1) penetrates through the battery compartment jack (3-3-1) to be connected with the battery connector jack (3-4-6) in the main body (3-1) in a matched mode, and the battery connector male head (3-2-1) props against the safety block (3-4-2) to enable the safety block to move towards the installation direction of the battery (3-2); a locking groove (3-2-1-1) which is matched and connected with a lock tongue (3-4-5-2) on a battery lock tongue (3-4-5) is arranged on the lower end face of the male head (3-2-1) of the battery connector.
2. A miniaturized upper gastrointestinal dynamic pH impedance monitoring device according to claim 1, wherein:
in the battery lock (3-4-1), the sliding switch (3-4-1-4) is of an I-shaped structure, and the sliding switch is embedded in the middle of the I-shaped structure and is connected in a sliding groove on the shell on the upper side of the main body (3-1) in a sliding way.
3. A miniaturized upper gastrointestinal dynamic pH impedance monitoring device according to claim 2, wherein:
the battery lock (3-4-1) comprises a pair of sliding switches (3-4-1-4); the pair of sliding switches (3-4-1-4) are respectively fixed at the upper ends of the clamping strips (3-4-1-1) at the two ends of the locking piece.
4. A miniaturized upper gastrointestinal dynamic pH impedance monitoring device according to claim 2, wherein:
in the locking piece, the plane projection of the connecting strip (3-4-1-2) is of an L-shaped structure, and the clamping strips (3-4-1-1) at the two ends of the connecting strip (3-4-1-2) are staggered in the front-back direction.
5. A miniaturized upper gastrointestinal dynamic pH impedance monitoring device according to claim 2, wherein:
the safety block (3-4-2) is provided with a spring hole (3-4-2-4) which is connected with the return spring (3-4-3) in a matched mode, and the return spring (3-4-3) is fixedly arranged in the spring hole (3-4-2-4).
6. A miniaturized upper gastrointestinal dynamic pH impedance monitoring device according to claim 2, wherein:
the battery compartment (3-3) is flush with the lateral surfaces of the two sides of the main body (3-1).
7. A miniaturized upper gastrointestinal dynamic pH impedance monitoring device according to claim 1, wherein:
the circuit device also comprises a collection front-end circuit (6-2), a controller (6-3) and a wireless transceiver module (6-4); the acquisition front-end circuit (6-2) transmits signals detected by the pH impedance sensing electrode (1) to the controller (6-3), and the signals are transmitted to the background terminal (4) through the wireless transceiver module (6-4) after being processed by the controller (6-3); the power management module (6-1) comprises a power management chip LTC4413, a main power battery BT1 connected with an INA pin of the power management chip LTC4413 and a backup battery BT2 connected with an INB pin of the power management chip LTC4413, wherein the power management chip LTC4413 selects one of the main power battery BT1 and the backup battery BT2 with high voltage to provide power for a load; the background terminal (4) is a PC with a wireless receiver or mobile communication equipment.
8. The miniaturized upper gastrointestinal dynamic pH impedance monitoring device of claim 7, wherein:
the positive electrode of the main power battery BT1 is connected with the D electrode of the PMOS tube Q1, and the negative electrode of the main power battery BT1 is grounded; the D pole of the PMOS tube Q1 is connected with the positive pole of the main power battery BT1, the S pole is connected with the INA pin of the power management chip LTC4413, and the G pole is grounded; one end of the TVS diode D1 is connected between the positive electrode of the main power battery BT1 and the D electrode of the PMOS tube Q1, and the other end of the TVS diode D1 is grounded; the OUTA pin of the power management chip LTC4413 is grounded through a capacitor C2;
the positive electrode of the backup battery BT2 is connected with the D electrode of the PMOS tube Q2, and the negative electrode of the backup battery BT2 is grounded; the D pole of the PMOS tube Q2 is connected with the positive pole of the backup battery BT2, the S pole is connected with the INB pin of the power management chip LTC4413, and the G pole is grounded; one end of the TVS diode D2 is connected between the positive electrode of the backup battery BT2 and the D electrode of the PMOS tube Q2, and the other end of the TVS diode D2 is grounded; the INB pin of the power management chip LTC4413 is grounded through a capacitor C1, and the OUTB pin is grounded through a capacitor C2.
9. The miniaturized upper gastrointestinal dynamic pH impedance monitoring device of claim 8, wherein: the power management module (6-1) further comprises an indication circuit, the indication circuit comprises a resistor R1, a resistor R2 and a Light Emitting Diode (LED) 1, wherein one end of the resistor R1 and one end of the Light Emitting Diode (LED) 1 are connected in series and then are connected with the S pole of the PMOS tube Q2, and the other end of the resistor R1 and one end of the light emitting diode are connected with the STAT pin of the power management chip LTC 4413; and two ends of the resistor R2 are connected between a STAT pin and an OUTA pin of the power management chip LTC 4413.
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| CN201710938811.XA CN107684412B (en) | 2017-09-30 | 2017-09-30 | Miniaturized upper gastrointestinal dynamic pH impedance monitoring device |
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