Short-time power failure prevention and signal transmission circuit for hyperbaric oxygen chamber
By combining current limiting protection circuits, energy storage circuits, and optocoupler isolation circuits, the problems of data loss and equipment failure in hyperbaric oxygen chambers during power outages were solved, thereby improving the stability and safety of the system.
Patent Information
- Application Number
- CN202520365343.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-04
AI Technical Summary
Existing hyperbaric oxygen chambers are prone to data loss, equipment failure, lack of alarm and protection mechanisms, and poor system stability when power is interrupted or voltage fluctuates, which affects patient safety and treatment outcomes.
By employing current-limiting protection circuits, energy storage circuits, and optocoupler isolation circuits, combined with signal transmission circuits, the system ensures protective operation in the event of power abnormalities through precise current control, provision of backup power, and timely alarms.
It effectively prevents circuit damage, ensures data preservation, reduces the risk of equipment failure, improves system stability and security, and avoids data loss.
Smart Images
Figure CN223957537U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field, concretely is a kind of for the short-time power failure prevention and signal sending circuit of hyperbaric oxygen chamber. BACKGROUND
[0002] Hyperbaric oxygen chamber is a kind of medical equipment that provides high concentration oxygen and higher than normal pressure environment. Its basic principle is to input compressed air or pure oxygen into the cabin to increase the pressure in the cabin, and patients breathe high concentration oxygen in this high pressure environment. Hyperbaric oxygen chamber mainly includes cabin body, oxygen supply system, pressure regulating system, ventilation system, electrical system, data recording and communication, etc. These systems or functions are mainly controlled by circuit, so the stability, safety and accuracy of circuit are crucial.
[0003] At present, the hyperbaric oxygen chamber on the market, especially in the process of user use, if power failure occurs, it will automatically perform pressure relief operation to ensure the user safety evacuation. But the prior art still has deficiencies, mainly reflected in:
[0004] 1. Data loss problem
[0005] In the existing hyperbaric oxygen chamber circuit, due to lack of effective backup power mechanism, when power interruption occurs, the data storage device in the circuit (such as data recording module for recording patient treatment data, equipment operating parameters, etc.) cannot complete normal data saving operation due to sudden power failure. For example, the oxygen inhalation time and pressure change data of the patient being recorded may be lost, which will have adverse effects on subsequent treatment evaluation and equipment maintenance.
[0006] 2. Increased risk of equipment failure
[0007] When voltage fluctuation is large, various electronic devices and control systems in hyperbaric oxygen chamber may be damaged. For example, electronic components in the circuit (such as sensors, controllers, etc.) usually have their rated operating voltage range, when the voltage exceeds this range, the components may be damaged. Like pressure sensor, if damaged due to excessive voltage, it cannot accurately measure the pressure in the oxygen chamber, which will affect the safe operation of the oxygen chamber; motor and other power equipment may be overloaded, overheated and other situations due to abnormal voltage, and then cause failure.
[0008] 3. No alarm and protection mechanism
[0009] The existing high-pressure oxygen cabin circuit does not have a corresponding alarm signal sending function when facing power interruption or voltage fluctuation. This means that the staff cannot learn about the abnormal power supply in time, and cannot take measures in time, such as manually starting the standby power supply or performing emergency maintenance on the equipment. At the same time, due to the lack of automatic protection mechanism, the equipment is easy to continue in an unstable state under abnormal power supply, further increasing the risk of equipment damage and patient safety.
[0010] 4. Poor system stability
[0011] The instability of the power supply will cause the entire high-pressure oxygen cabin system to be unable to run smoothly. For example, during voltage fluctuation, the oxygen supply system, ventilation system, etc. in the oxygen cabin may appear abnormal work. The oxygen supply may have flow fluctuation due to the instability of the control circuit, and the fan speed of the ventilation system may change due to the abnormal operation of the motor, which will affect the oxygen concentration, temperature and humidity, etc. Environmental parameters in the oxygen cabin, reduce the comfort of patients, and are not conducive to the normal use of the oxygen cabin. Practical new type content
[0012] The utility model discloses a kind of short-time power failure prevention and signal sending circuit for high-pressure oxygen warehouse, to solve the problems raised in the above background technology.
[0013] To achieve the above object, the utility model provides the following technical scheme: a short-time power failure prevention and signal sending circuit for high-pressure oxygen warehouse, including current-limiting protection circuit, energy storage circuit, opto-isolator circuit and signal sending circuit, the energy storage circuit and the opto-isolator circuit connect the current-limiting protection circuit, and the signal sending circuit is connected with the opto-isolator circuit.
[0014] Preferably, the current-limiting protection circuit includes field effect transistor M1, field effect transistor M2, capacitor C1, capacitor C2, resistor R1, resistor R2, resistor R3 and resistor R4, and the pin connection relationship of field effect transistor M1 and field effect transistor M2 is as follows:
[0015] The drain electrode of the field effect transistor M1 is connected to a 12V power supply.
[0016] The source electrode of the field effect transistor M1 is connected to the ground through the resistor R2.
[0017] The gate electrode of the field effect transistor M1 is connected to the gate electrode of the field effect transistor M2 through the resistor R3.
[0018] The drain electrode of the field effect transistor M2 is connected to one end of the capacitor C1 and the capacitor C2, and is connected to the ground through the resistor R4.
[0019] The source electrode of the field effect transistor M2 is connected to the resistor R7.
[0020] Wherein, 12v power supply connects the other end of capacitor C and capacitor C2.
[0021] Preferably, the energy storage circuit includes diode D1, diode D2, capacitor C3, capacitor C4, capacitor C5 and capacitor C6, the positive electrode of diode D1 is connected with pin 3 of field effect transistor M2, the negative electrode is connected with one end of capacitor C3 and C4, and is connected with the positive electrode of diode D2 at the same time.
[0022] The negative electrode of diode D2 is connected with +12V0 power supply, and is connected with one end of capacitor C5 and C6 at the same time.
[0023] The other end of capacitor C3 and C4 is grounded.
[0024] The other end of capacitor C5 and C6 is grounded.
[0025] Preferably, the opto-isolator circuit includes opto-coupler TLP1, resistor R7, resistor R10 and resistor R11, pin 1 of opto-coupler TLP1 is connected with resistor R7, pin 2 is connected with +3.3V power supply through resistor R10, pin 3 is connected with +3.3V power supply through resistor R11, and pin 4 is connected with the base electrode of triode Q1 through resistor R8.
[0026] Preferably, the signal sending circuit includes triode Q1, resistor R5, resistor R6, resistor R8, resistor R9 and capacitor C7, the collector of triode Q1 is connected with +3.3V power supply through resistor R9, the emitter is grounded, the base electrode is connected with pin 4 of opto-coupler through resistor R8, and is grounded through capacitor C7 at the same time, resistor R5 and R6 are connected in series between +3.3V power supply and GPIO pin.
[0027] Compared with the prior art, the utility model has the beneficial effects that:
[0028] 1. The utility model discloses a current limiting protection circuit accurate control current flow, make field effect transistor M2 first conduction when current is too large, thereby limit current, avoid circuit damage, compared with the traditional simple current limiting protection mode, the utility model discloses accurate current control and sequential conduction mechanism, improve the flexibility and response speed of current protection greatly, the on -off sequence control current of field effect transistor M2 and field effect transistor M1 always keeps in a safe range, can effectively prevent the damage of abnormal power (such as current is too large or voltage fluctuation) to the later stage circuit.
[0029] 2.The energy storage circuit can provide a short-term backup power supply through the energy storage capacitor when the power supply is interrupted or the voltage fluctuates greatly, ensures that the system can continue to work under the condition of temporary power failure, performs important tasks such as data saving and protective shutdown, enables the system to smoothly transition under unstable power supply conditions, and avoids system failure or data loss
[0030] 3.The signal sending circuit can send an alarm signal in time when the power supply is interrupted or the voltage is abnormal, ensures that the equipment or system can automatically take protective measures, ensures that the system can enter the protection mode when the voltage fluctuates greatly, and avoids data loss or equipment damage.
[0031] 4.Because the on-off timing of the field effect transistor M1 and the field effect transistor M2 has a clear time difference, the circuit can quickly start the protection mechanism when the power supply is abnormal, first turn on the field effect transistor M2 current limiting circuit, and then ensure the safe flow of current through the field effect transistor M1. Such a design has a faster response speed and higher accuracy than traditional circuits. The precise coordination of the energy storage circuit and the optocoupler isolation circuit enables the utility model to maintain stable operation under abnormal power supply conditions, provides sufficient time for the system to perform data saving, automatic shutdown and other operations, and reduces the risk of system downtime caused by power supply problems. BRIEF DESCRIPTION OF DRAWINGS
[0032] Fig. 1 It is a schematic diagram of the circuit connection of the utility model;
[0033] Fig. 2 It is a circuit schematic diagram of the utility model. DETAILED DESCRIPTION
[0034] The technical solutions in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0035] Please refer to Figs. 1-2The utility model provides a technical scheme: a kind of for high pressure oxygen cabin's short-time power failure prevention and signal sending circuit, including current-limiting protection circuit 100, energy storage circuit 200, opto-isolator circuit 300 and signal sending circuit 400, the energy storage circuit 200 and the opto-isolator circuit 300 connect the current-limiting protection circuit 100, the signal sending circuit 400 connects the opto-isolator circuit 300.Specifically, when high pressure oxygen cabin power supply input 12V power, the current-limiting protection circuit 100 of the application protects the post-circuit, prevents the circuit damage due to excessive current.At the same time, current-limiting protection circuit 100 ensures that current is in safe range, to guarantee the stability of system, under the condition that power input is normal, energy storage circuit 200 stores certain electric energy using capacitor, ensures that circuit can continue to power supply and maintain normal work under the condition of short-time power failure or voltage fluctuation.Energy storage circuit 200 provides sufficient time for system to execute necessary protection measures, such as data saving, equipment abnormal state reports cloud, when power voltage fluctuation or instantaneous power failure occurs, opto-isolator circuit 300 plays the role of isolation, avoids the influence of unstable power supply on subsequent circuit.Opto-isolator circuit 300 passes through opto-coupler element and transmits voltage fluctuation information to signal sending circuit 400, ensures that system identifies power state change in time, and triggers the sending of power failure signal.Signal sending circuit 400 immediately issues power-off notification signal after receiving power interruption or voltage abnormality signal, prompts system to enter power failure protection mode, and can be alarmed or recorded through external device.This signal can help control system to carry out key operation, such as starting battery power supply, saving data, protecting equipment, prevent system from failure or data loss due to unstable power supply.
[0036] In an embodiment of the utility model, the current-limiting protection circuit 100 includes field effect transistor M1, field effect transistor M2, capacitor C1, capacitor C2, resistance R1, resistance R2, resistance R3 and resistance R4, and the pin connection relationship of field effect transistor M1 and field effect transistor M2 is as follows:
[0037] The drain electrode of field effect transistor M1 is connected to 12V power supply.
[0038] The source electrode of field effect transistor M1 is connected to ground through resistance R2.
[0039] The gate electrode of field effect transistor M1 is connected to the gate electrode of field effect transistor M2 through resistance R3.
[0040] The drain electrode of field effect transistor M2 is connected to one end of capacitor C1 and capacitor C2, and is connected to ground through resistance R4.
[0041] The source electrode of field effect transistor M2 is connected to resistance R7.
[0042] Wherein, 12v power supply connects the other end of the capacitor C and the capacitor C2.
[0043] In an embodiment of the utility model, specifically, when +12VI end input 12V power supply, the turn-on sequence of field effect transistor M1 and field effect transistor M2 is: from capacitor C1 to resistor R3 to resistor R4 to capacitor C2 to resistor R2, the base voltage of field effect transistor M1 will gradually decrease to 0V from the negative electrode voltage 12V of capacitor C1 through resistor R3 and resistor R4, and the base voltage of field effect transistor M2 will gradually decrease to 0V from the negative electrode voltage 12V of capacitor C2 through resistor R2. Through calculation, it can be known that when the base voltage of field effect transistor M1 is 0, 20ms of time is needed, and when the base voltage of field effect transistor M2 is 0, only 3ms of time is needed, that is, the falling speed of the base voltage of field effect transistor M2 is 7 times that of field effect transistor M1. Therefore, field effect transistor M2 will be turned on earlier than field effect transistor M1, and field effect transistor M1 is turned off after field effect transistor M2 is turned on. The combination of capacitor C1, capacitor C2, resistor R3, resistor R4 and resistor R2 determines the turn-on sequence of field effect transistor M1 and field effect transistor M2, and the flow of current is limited by controlling the on-off state of the transistor. Field effect transistor M2 is turned on when the current is too large, thereby avoiding damage to the subsequent circuit by limiting the current, and in the case that the power supply voltage is unstable or overcurrent occurs, the turn-on sequence of field effect transistor M2 and field effect transistor M1 can ensure that the current is always within a safe range, thereby protecting the subsequent circuit.
[0044] In an embodiment of the utility model, the energy storage circuit comprises diode D1, diode D2, capacitor C3, capacitor C4, capacitor C5 and capacitor C6, the positive electrode of diode D1 is connected to pin 3 of field effect transistor M2, the negative electrode is connected to one end of capacitor C3 and C4, and is also connected to the positive electrode of diode D2.
[0045] The negative electrode of diode D2 is connected to +12V0 power supply, and is also connected to one end of capacitor C5 and C6.
[0046] The other end of capacitor C3 and C4 is grounded.
[0047] The other end of capacitor C5 and C6 is grounded.
[0048] In an embodiment of the utility model, the opto-coupler isolation circuit comprises opto-coupler TLP1, resistor R7, resistor R10 and resistor R11, pin 1 of opto-coupler TLP1 is connected to resistor R7, pin 2 is connected to +3.3V power supply through resistor R10, pin 3 is connected to +3.3V power supply through resistor R11, and pin 4 is connected to the base of triode Q1 through resistor R8.
[0049] In an embodiment of the utility model, the signal sending circuit includes triode Q1, resistance R5, resistance R6, resistance R8, resistance R9 and electric capacity C7, the collector of triode Q1 is connected to +3.3V power supply through resistance R9, the emitter is grounded, the base is connected to the pin 4 of photo-coupler through resistance R8, and is grounded through electric capacity C7 simultaneously, and resistance R5 and R6 are connected in series between +3.3V power supply and GPIO pin.
[0050] TLP1 is a commonly used optical coupling element, usually containing LED and photosensitive triode inside. At this time, the LED inside TLP1 will be activated due to the change of current, and the light signal emitted by the LED will drive the photosensitive triode to conduct. The conduction state of the photosensitive triode will form a signal transmission at the other end of the circuit. The role of TLP1 is to effectively isolate the voltage information of the power supply end through the optical signal and transmit it to the signal sending circuit. This is to avoid the direct impact of power supply fluctuations or transient power failure on the control circuit, and to ensure the stability of the signal sending circuit. The output end of TLP1 will transmit the change of power supply state to the subsequent signal processing circuit, helping the system to perceive power abnormalities in time. When the power supply occurs transient power failure or voltage fluctuation, the energy storage circuit 2 (composed of capacitors C3, C4, C5, C6, etc.) provides necessary energy storage. The capacitor will quickly release the stored energy to ensure that the circuit can continue to work stably after the power is disconnected, and provide sufficient power support for the signal sending circuit, protection circuit, etc. The design of the energy storage circuit ensures that the system can operate normally within a short time of power failure, and completes the necessary protection operation. This period of time is usually between a few milliseconds and a few hundred milliseconds, enough for the system to complete emergency operations such as data saving and device closing, to prevent faults or data loss caused by power fluctuations.
[0051] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A short power failure and signal sending circuit for a hyperbaric oxygen chamber, characterized in that, It includes current limiting protection circuit, energy storage circuit, opto-isolating circuit and signal sending circuit, the energy storage circuit and the opto-isolating circuit connect the current limiting protection circuit, and the signal sending circuit connects the opto-isolating circuit; The current limiting protection circuit includes field effect transistor M1, field effect transistor M2, capacitor C1, capacitor C2, resistor R1, resistor R2, resistor R3 and resistor R4, and the pin connection relationship of field effect transistor M1 and field effect transistor M2 is as follows: The drain electrode of field effect transistor M1 is connected to 12V power supply; The source electrode of field effect transistor M1 is connected to ground through resistor R2; The gate electrode of field effect transistor M1 is connected to the gate electrode of field effect transistor M2 through resistor R3; The drain electrode of field effect transistor M2 is connected to one end of capacitor C1 and capacitor C2, and is connected to ground through resistor R4; The source electrode of field effect transistor M2 is connected to resistor R7; Wherein, 12v power supply connects the other end of capacitor C and capacitor C2; The energy storage circuit includes diode D1, diode D2, capacitor C3, capacitor C4, capacitor C5 and capacitor C6, the positive electrode of diode D1 is connected to pin 3 of field effect transistor M2, the negative electrode is connected to one end of capacitor C3 and C4, and is connected to the positive electrode of diode D2 at the same time; The negative electrode of diode D2 is connected to +12V0 power supply, and is connected to one end of capacitor C5 and C6 at the same time; The other end of capacitor C3 and C4 is connected to ground; The other end of capacitor C5 and C6 is connected to ground.
2. The short power-off and signal sending circuit for the hyperbaric oxygen chamber according to claim 1, characterized in that: The opto-isolating circuit includes photoelectric coupler TLP1, resistor R7, resistor R10 and resistor R11, pin 1 of photoelectric coupler TLP1 is connected to resistor R7, pin 2 is connected to +3.3V power supply through resistor R10, pin 3 is connected to +3.3V power supply through resistor R11, and pin 4 is connected to the base electrode of triode Q1 through resistor R8.
3. The short power-off and signal sending circuit for the hyperbaric oxygen chamber according to claim 2, characterized in that: The signal sending circuit includes triode Q1, resistor R5, resistor R6, resistor R8, resistor R9 and capacitor C7, the collector electrode of triode Q1 is connected to +3.3V power supply through resistor R9, the emitter electrode is connected to ground, the base electrode is connected to pin 4 of photoelectric coupler through resistor R8, and is connected to ground through capacitor C7 at the same time, resistor R5 and R6 are connected in series between +3.3V power supply and GPIO pin.