CN201510284U - Medical electronic manometer - Google Patents
Medical electronic manometer Download PDFInfo
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- CN201510284U CN201510284U CN200920175755XU CN200920175755U CN201510284U CN 201510284 U CN201510284 U CN 201510284U CN 200920175755X U CN200920175755X U CN 200920175755XU CN 200920175755 U CN200920175755 U CN 200920175755U CN 201510284 U CN201510284 U CN 201510284U
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Abstract
The utility model relates to a medical electronic manometer comprising an upper housing, a lower housing and a circuit board, wherein, the circuit board is arranged between the upper and the lower housings, a main controller is arranged on the circuit board, a back-light plate is arranged between the circuit board and the upper housing, an LCD is arranged between the back-light plate and the upper housing as well as right above the back-light plate, a transparent window corresponding to the LCD is arranged on the upper surface of the upper housing, a switch button and a buzzer are arranged on one side of the transparent window, a battery housing is arranged at the bottom of the lower housing, a power supply circuit is arranged in the battery housing, the main controller is further electrically connected with an LED indicator light and an operational amplifier, and the operational amplifier is electrically connected with a temperature compensation circuit and a pressure sensor arranged inside the lower housing respectively. The utility model has the benefits of diversity, compact outline, portability and convenient use, and can assist medical staff in monitoring and attending first-aid equipment and patients in a real-time manner at any time.
Description
Technical field
This utility model relates to a kind of medical electric Pressure gauge.
Background technology
Along with society constantly develops, not only sciemtifec and technical sphere constantly enlarges, and environmental pollution is also in continuous expansion, in the last few years the sickness rate of respiratory tract disease more and more become younger, group feature.Cause of disease also no longer is the simple mankind, the very strong respiratory disorders of variability such as bird flu, H1N1 more occurred.Old-fashioned respiration detection equipment itself just exists volume great, move inconvenient, various disadvantages such as repeated use, its machine itself with instrument and meter a series of problems that influence result of use such as product is outmoded, system aging, trivial operations also appear often.Disposable use respirator listing plays a significantly greater role to giving emergency treatment to a patient, but some problems easily take place between disposable respirator and the oxygen supply pipe, pushed carelessly or broken away from oxygen supply device as the oxygen supply pipe, and can not be monitored in real time gas pressure and frequency of respiration.Therefore, easy and simple to handle, data are accurate, and the small and exquisite medical electronic apparatus of volume needs faster development to upgrade.
The utility model content
The purpose of this utility model provides a kind of medical electric Pressure gauge, not only can help to reduce any problem that takes place between disposable respirator and the oxygen supply pipe, and can monitor in real time gas pressure and frequency of respiration.
The purpose of this utility model is to be achieved through the following technical solutions:
A kind of medical electric Pressure gauge, comprise upper shell, lower house and circuit board, wherein, described circuit board is located between upper shell and the lower house, circuit board is provided with master controller, be provided with backlight between circuit board and the upper shell, be provided with liquid crystal display between backlight and the upper shell and directly over backlight, backlight and liquid crystal display all be located at circuit board on master controller be electrically connected; The side that the upper surface of described upper shell is provided with the corresponding transparent window of described liquid crystal display, transparent window is provided with switching push button and buzzer, and switching push button is electrically connected with master controller by key circuit, and buzzer directly is electrically connected with master controller; The bottom of described lower house is provided with battery container, is provided with power circuit in the battery container; Described master controller also is electrically connected with LED light and operational amplification circuit, operational amplification circuit respectively with temperature-compensation circuit, be located at lower house pressure inside sensor electrical and be connected.
The beneficial effects of the utility model are: realized the function of a tractor serves several purposes, profile is small and exquisite, and is easy to carry, easy to use, can assist medical personnel at any time first-aid apparatus and patient to be monitored nursing in real time.
Description of drawings
Fig. 1 is the manometric structural representation of the described medical electric of this utility model embodiment;
Fig. 2 is the manometric front view of the described medical electric of this utility model embodiment;
Fig. 3 is the A-A cutaway view of Fig. 2;
Fig. 4 is the manometric theory diagram of the described medical electric of this utility model embodiment;
Fig. 5 is the manometric power circuit principle figure of the described medical electric of this utility model embodiment;
Fig. 6 is the manometric key circuit schematic diagram of the described medical electric of this utility model embodiment;
Fig. 7 is the manometric liquid crystal display-driving schematic diagram of the described medical electric of this utility model embodiment;
Fig. 8 is the manometric testing circuit schematic diagram of the described medical electric of this utility model embodiment;
Fig. 9 is the manometric indicating section schematic diagram of the described medical electric of this utility model embodiment.
Among the figure:
1, upper shell; 101, backlight; 102, liquid crystal display; 103, transparent window; 104, switching push button; 105, buzzer; 2, lower house; 201, pressure transducer; 202, zero degree is regulated; 3, circuit board; 4, key circuit; 5, battery container; 501, power circuit; 6, LED light; 7, operational amplification circuit; 8, compensating circuit.
The specific embodiment
Shown in Fig. 1-4, the described medical electric Pressure gauge of this utility model embodiment, comprise upper shell 1, lower house 2 and circuit board 3, wherein, described circuit board 3 is located between upper shell 1 and the lower house 2, circuit board 3 is provided with master controller 301, be provided with backlight 101 between circuit board 301 and the upper shell 1, be provided with liquid crystal display 102 between backlight 101 and the upper shell 1 and directly over backlight 101, backlight 101 and liquid crystal display 102 all be located at circuit board 3 on master controller 301 be electrically connected; The side that the upper surface of described upper shell 1 is provided with described liquid crystal display 102 corresponding transparent windows 103, transparent window 103 is provided with switching push button 104 and buzzer 105, switching push button 104 is electrically connected with master controller 301 by key circuit 4, and buzzer 105 directly is electrically connected with master controller 301; The bottom of described lower house 2 is provided with battery container 5, is provided with power circuit 501 in the battery container 5; Described master controller 301 also is electrically connected with LED light 6 and operational amplification circuit 7, operational amplification circuit 7 respectively with temperature-compensation circuit 8, be located at lower house 2 pressure inside pick offs 201 and be electrically connected.
The 8 8-digit microcontroller MC9RS08KA8RM that described master controller 31 adopts U.S. Freescale company to produce.This single-chip microcomputer is built-in 8 tunnel 10 A/D converters, two intervalometers, 4 road PWM output.In an embodiment, used three road A/D conversion, respectively air pressure, Current Temperatures, cell voltage have been sampled, detected temperature-compensating and battery voltage detection in order to realize gas pressure.
XC9111C501MR and XC6206P362MR that the Japanese Torex of described power circuit 501 employings company produces.The effect of XC9111C501MR be the 3V boost in voltage of two joint AAA batteries to 5V, be pressure transducer 201 as main power source, operational amplification circuit 7 and subsequent conditioning circuit power supply.And the effect of XC6206P362MR to be main power source with 5V be depressurized to 3.6V, be master controller 301 and liquid crystal display 102 power supplies.
The US-9111-001-S that described pressure transducer 201 adopts Taiwan Quan Lei company to produce, or the MPX2300DT1 of U.S. Freescale company production, pressure transducer 201 adopts 5V power voltage supply modes, and converts detected force value to signal of telecommunication output.
The MCP6004TISL four high guaily unit chip that described operational amplification circuit 7 uses U.S. Microchip company to produce, after pressure transducer 201 detects pressure, to export and the corresponding signal of telecommunication of this force value, this signal of telecommunication is input to operational amplification circuit 7, and after through operational amplification circuit 7 signal being amplified, export master controller 301 to, and after finishing corresponding calculated by master controller 301, data are outputed to liquid crystal display 102 show.
The manometric complete machine operation principle of medical electric described in the utility model is:
1, power supply: adopting two joint AAA batteries is main working power, and the connected mode of battery is series connection.Therefore, the voltage of main working power should be 3V.
2, electric pressure conversion: as shown in Figure 5, because adopt battery powered, along with the minimizing of the electric weight of storing in the battery, the supply voltage of main electricity is unsettled, simultaneously a lot of devices can not be operated under the 3V power supply, have designed special-purpose power circuit 501 for this reason.After connecting main power source, power circuit 501 at first rises to 5V with voltage, and the 5V power supply will be pressure transducer 201 and operational amplification circuit 7 power supplies.Simultaneously, on the basis of 5V,, 5V is reduced to 3.6V, be master controller 301 by reducing transformer, liquid crystal display 102, key circuit 4 waits other peripheral circuit power supplies.Owing to adopted such power supply mode, the energy content of battery drop to can not keep work before, even cell voltage changes, 5V and 3.6V power supply all are stable, have so just guaranteed the stability of manometric accuracy of detection of medical electric and work thereof.
3, key circuit 4: the upper surface of upper shell 1 is provided with switching push button 104, and this is a multi-functional button, and this switching push button 104 can be realized start, displaying contents conversion, shutdown function.And these functions are all realized by key circuit 4, as shown in Figure 6.
As seen from Figure 6, after installing battery, because not conducting of T1, so cell voltage VBAT can not set up; After the K1 that pushes button was switching push button 104, battery passed through button K1, diode D1, and resistance R 3 gives capacitor C 1 charging; After capacitor C 1 charging is finished, no matter whether button also is in down state, can not charge to C1, and at this moment, C1 to the discharge of the base stage of audion T2, makes audion T2 conducting by resistance R 2, and T1 is with regard to conducting after the T2 conducting, at this moment battery provides temporary transient power supply can for the circuit of back, and master controller 301 is started working.Behind master controller 301 electrification resets, first work that will do is exactly to make the I/O mouth that connects diode D4 and R8 be set to high level, and this high level passes through resistance R 8, diode D2, and resistance R 2 makes audion T2 keep conducting state.And because audion T2 has kept conducting state, T1 will keep conducting, and the operation of entire equipment power supply has just been set up like this.
After equipment enters normal operating conditions, the K1 that pushes button again, the electric current of being exported by battery can pass through button K1, and resistance R 5 flows into the base stage of audion T3.At this moment, low level can appear in the I/O mouth that connects audion T3 and resistance R 7, and this low level signal will be pressed signal as button and be input in the master controller 301.Master controller 301 can be known has button to supress, and at this moment master controller 301 will be finished corresponding operation according to program.
When button was pressed for a long time, master controller was pressed having detected button, kept more than 3 seconds if this button is pressed signal, and the I/O mouth that connects diode D4 and resistance R 8 can output low level.At this moment, though capacitor C 1 has been full of electricity, owing at this moment be not injected into the electric current in the audion T2 base stage.Therefore, audion T2 turn-offs, and the shutoff of T2 can cause the shutoff of T1, and like this, electric process is finished under the equipment.
Diode D3 and resistance R 4 are to provide a discharge loop to capacitor C 1, in order to guarantee that after outage C1 can fully discharge.So just can guarantee normal boot-strap next time.
4, liquid crystal display 104: adopted the liquid crystal of no driver, and two liquid-crystalline glasses that segment encode shows, its display driver mode is that master controller I/O mouth directly drives.Do like this, saved liquid crystal driver, the manufacturing cost of product is declined to a great extent, as shown in Figure 7.
Utilize master controller 301I/O mouth to have the characteristic of ternary output, PB0 is arrived PB3 as com port, PB4 is arrived PB7 as the SEG mouth, the mode with dynamic scan drives liquid crystal display.
The meansigma methods of the voltage that is applied for every COM line making liquid crystal and SEG line two ends is zero, and PB0 will periodically export staircase waveform to PB3.When PB0 exported high level to PB3, the COM line was a high level; When PB0 arrived the PB3 output low level, the COM line was a low level; When PB0 when PB3 is changed to input state, the corresponding I/O mouth of master controller is a high-impedance state, at this moment by electric resistance partial pressure, makes the COM line obtain the voltage of VCC/2, thereby has produced the scanning staircase waveform.
Because PB0 is one-line scanning to PB3, so, can finish the display driver of liquid crystal display as long as make PB4 export corresponding data to PB7.
5, testing circuit part: testing circuit by regulate 202 at pressure transducer 201, zero point, compensating circuit 8, operational amplification circuit 7 these several parts form.Major function is: regulate the zero point of pressure transducer and operational amplifier, finish the detection of gas pressure, finish the compensation of ambient temperature to the pressure transducer influence, finish the detection of cell voltage, as shown in Figure 8.
As seen from Figure 8, resistance R 1, R2, operational amplifier U2A forms reference circuit, because R1=R2, so U2A will export the voltage of a 1.8V.This voltage will be as the reference voltage of whole testing circuit.Owing to be provided with reference voltage, therefore, testing circuit can detect negative value.
P1 is a pressure transducer 201, amplifies by two-stage to obtain one and the corresponding magnitude of voltage of pressure.Because the first order is differential amplification, so the output signal of the first order can be brought up near the reference voltage.The second level is that computing is amplified, and the output signal of pressure transducer is amplified in the range ability of master controller A/D conversion, and the A/D0 mouth of master controller 301 will be finished the detection of gas pressure.
RT is a critesistor, by R9, and R10, RT, R11 forms a unbalanced bridge, and finishes detection to ambient temperature by amplifier U2D.Because RT is a nonlinear device, so the pairing voltage output signal of temperature also is non-linear.For guaranteeing correct temperature-compensating, the existing correction of ambient temperature has software to finish fully, and the A/D2 mouth of master controller 301 is finished the detection of ambient temperature.The A/D1 mouth of master controller is finished the detection of cell voltage.
6, auxiliary and indicating section: this part is made up of backlight 101, LED light 6, buzzer 105 3 parts, as shown in Figure 9.
Because what the described medical electric voltmeter of this utility model embodiment adopted is liquid crystal display, thus must design backlight, thereby guarantee its round-the-clock use.D1, D2, D3 are light emitting diode among Fig. 9, and wherein D1 is used to light backlight.Owing to be battery powered, save the key that electric energy is design.For this reason, utilized master controller to have this characteristic of PWM (pulse width modulation) output.Making dutycycle of I/O mouth PA1 output of master controller is 1: 4, and frequency is the waveform of 5KHz, is used for driven for emitting lights diode D1, lights effect backlight and economize on electricity thereby reach.D2 is the outrange display lamp, when gas pressure less than 0 centimeter water column, or be higher than 60 centimeter water columns, or frequency of respiration is during less than 8 times, this display lamp can be lighted according to 0.5 second, the mode of extinguishing in 1 second is ceaselessly glimmered, and has occurred unsafe condition at present with the prompting user.D3 is the low display lamp of cell voltage.When master controller detects cell voltage when not enough, this display lamp can be lighted according to 0.5 second, and the mode of extinguishing in 1 second is ceaselessly glimmered, and need change battery immediately with the prompting user.
R4, R5, C1, Q1, BELL have formed auditory tone cues electric circuit.R4 and C1 have formed a low pass filter in the circuit, and the High-frequency Interference that produces when suppressing buzzer call guarantees the operate as normal of other circuit.Dutycycle of I/O mouth PA4 output of master controller is 1: 2, and frequency is the waveform of 2500Hz, drives buzzer BELL by audion Q1 and pipes.No matter be that the sort of detected value exceeds set point, in light prompting, buzzer can pipe according to 1 second, 1.5 seconds quiet modes warning message of sounding.
During concrete the use, install battery, press switching push button 104 after, enter normal operating conditions.Acquiescence is shown as the current pressure value.After pressing switching push button 104 once more, switch to frequency of respiration immediately and show.Press switching push button 104 again, get back to the demonstration of current pressure value again.When operate as normal, whenever press switching push button 104 next time, liquid crystal display 102 will switch between current pressure value and frequency of respiration.
When detecting the current pressure value less than 0cmH
2During O, show on the liquid crystal display 102 " LL ".When detecting the current pressure value greater than 60cmH
2During O, liquid crystal display 102 shows " HH ".Simultaneously, when current pressure value no to scale scope, or when gas pressure did not change in the pipeline, alarm lamp was ceaselessly flicker of LED light 6, and with the ringing of buzzer 105, took place in order to the dangerous situation of prompting user.
When detecting current gas pressure, can detect in real time cell voltage.When finding that cell voltage is low during to equipment operate as normal for this reason, " cell voltage hang down display lamp " is ceaselessly flicker of LED light 6, and while buzzer 105 is rung, and points out the user in time to change battery.
When pressing switching push button 104 and kept for 3 seconds above, can be automatically down.
The product detection range:
A) pressure measurement range: 0cmH2O～99cmH2O.Accuracy of detection: less than 5%.
B) frequency of respiration measuring range: 8 times/minute～60 times/minute.Breathing computational methods is that pressure differential is no less than 6cm H2O. accuracy of detection: less than 0.5 time/minute.
C) battery voltage measurement scope: 1.6V～3.6V.Accuracy of detection: less than 50mV.
The alarm mode of product:
A) affair alarm:, need to report to the police when frequency of respiration is lower than 8 times/minute.
B) start time of fire alarming: 3 seconds
C) cell voltage is low reports to the police: when detecting cell voltage and be lower than 2.5V, need to report to the police.
The environment for use of product:
A) ambient temperature :-30 ℃～60 ℃.
B) relative humidity: 99%.
C) atmospheric pressure: self adaptation.
D) storage temperature :-40 ℃～75 ℃.
Claims (1)
1. medical electric Pressure gauge, comprise upper shell (1), lower house (2) and circuit board (3), described circuit board (3) is located between upper shell (1) and the lower house (2), it is characterized in that: circuit board (3) is provided with master controller (301), be provided with backlight (101) between circuit board (3) and the upper shell (1), be provided with liquid crystal display (102) between backlight (101) and the upper shell (1) and directly over backlight (101), backlight (101) and liquid crystal display (102) all be located at circuit board (3) on master controller (301) be electrically connected; The side that the upper surface of described upper shell (1) is provided with the corresponding transparent window of described liquid crystal display (102) (103), transparent window (103) is provided with switching push button (104) and buzzer (105), switching push button (104) is electrically connected with master controller (301) by key circuit (4), and buzzer (105) directly is electrically connected with master controller (301); The bottom of described lower house (2) is provided with battery container (5), is provided with power circuit (501) in the battery container (5); Described master controller (301) also is electrically connected with LED light (6) and operational amplification circuit (7), operational amplification circuit (7) respectively with temperature-compensation circuit (8), be located at lower house (2) pressure inside pick off (201) and be electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920175755XU CN201510284U (en) | 2009-09-01 | 2009-09-01 | Medical electronic manometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920175755XU CN201510284U (en) | 2009-09-01 | 2009-09-01 | Medical electronic manometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201510284U true CN201510284U (en) | 2010-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920175755XU Expired - Fee Related CN201510284U (en) | 2009-09-01 | 2009-09-01 | Medical electronic manometer |
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| Country | Link |
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| CN (1) | CN201510284U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514358A (en) * | 2017-09-26 | 2017-12-26 | 无锡市凯丰压力表有限公司 | A kind of pressure gauge for compression pump |
| CN107642477A (en) * | 2017-10-31 | 2018-01-30 | 浙江威邦机电科技有限公司 | A kind of inflating pump of monitoring pressure in real time value |
| CN107941414A (en) * | 2017-11-20 | 2018-04-20 | 惠州伊尚生活科技有限公司 | A kind of electronic precision pressure gauge |
| TWI759855B (en) * | 2020-09-10 | 2022-04-01 | 財團法人工業技術研究院 | Sensing devices and correction method |
-
2009
- 2009-09-01 CN CN200920175755XU patent/CN201510284U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514358A (en) * | 2017-09-26 | 2017-12-26 | 无锡市凯丰压力表有限公司 | A kind of pressure gauge for compression pump |
| CN107642477A (en) * | 2017-10-31 | 2018-01-30 | 浙江威邦机电科技有限公司 | A kind of inflating pump of monitoring pressure in real time value |
| CN107941414A (en) * | 2017-11-20 | 2018-04-20 | 惠州伊尚生活科技有限公司 | A kind of electronic precision pressure gauge |
| TWI759855B (en) * | 2020-09-10 | 2022-04-01 | 財團法人工業技術研究院 | Sensing devices and correction method |
| US11913925B2 (en) | 2020-09-10 | 2024-02-27 | Industrial Technology Research Institute | Sensing devices and calibration method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100623 Termination date: 20140901 |
|
| EXPY | Termination of patent right or utility model |