CN206700161U - A kind of cardiographic detector - Google Patents
A kind of cardiographic detector Download PDFInfo
- Publication number
- CN206700161U CN206700161U CN201621341453.1U CN201621341453U CN206700161U CN 206700161 U CN206700161 U CN 206700161U CN 201621341453 U CN201621341453 U CN 201621341453U CN 206700161 U CN206700161 U CN 206700161U
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- China
- Prior art keywords
- unit
- ecg
- amplifier
- cardiographic detector
- detector according
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- Expired - Fee Related
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- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The utility model discloses a kind of cardiographic detector, including ECG detecting unit, ECG's data compression unit, terminal diaplay unit, the ECG detecting unit includes at least one sensor, the sensor includes housing and diaphragm, insulated between the diaphragm and piezoelectric element, and the diaphragm conductive layer is connected with wire, the diaphragm includes that resist warping basement membrane and conductive layer, and described conductive layer is uniformly arranged on the surface of that resist warping basement membrane.The utility model has reached the service life for extending electrocardiogram test instrument, has simplified the effect of production technology by preparing a kind of diaphragm with that resist warping basement membrane and conductive layer.
Description
Technical field
A kind of medical electronic instrument is the utility model is related to, more particularly relates to a kind of cardiographic detector.
Background technology
Electrocardiogram utilizes heart caused biological Electrical change in each cardiac cycle, and current potential is obtained by electrocardiograph
The figure of change.Electrocardiogram is the objective indicator of the generation of cardiac excitation, propagation and recovery process.In electrocardio measurement process,
EGC sensor is used for the electrocardiosignal for receiving testee.
Cardiographic detector generally comprises ECG detecting unit, ECG's data compression unit and terminal diaplay unit.Wherein, the heart
Electro-detection unit is used for the electrocardiosignal for detecting those who are investigated, and electrocardiosignal is exported to ECG's data compression unit；Electrocardio
Signal processing unit is used to electrocardiosignal is converted into the electrocardiogram (ECG) datas such as heart rate, ecg wave form by algorithm, and by electrocardiogram (ECG) data
Vision signal is converted into, is exported to terminal diaplay unit.The core original paper of electrocardio test cell is sensor, including housing, pressure
Electric device and diaphragm.
For cardiac, its electrocardiosignal is fainter, can be difficult because of signal extraction in measurement process, causes to measure
The problems such as inaccurate.
Utility model content
1st, the purpose of this utility model.
The utility model provides a kind of cardiographic detector to solve because signal extraction is stranded in measurement process in the prior art
The problem of difficult.
2nd, technical scheme used by the utility model.
The utility model proposes cardiographic detector, including ECG detecting unit, ECG's data compression unit, terminal show
Unit, wherein the ECG detecting unit is used to gather electrocardiosignal, send to the ECG's data compression unit；The electrocardio
Signal processing unit is used to handle the electrocardiosignal, and treated electrocardiosignal is sent to the terminal diaplay unit；Institute
Terminal diaplay unit is stated to be used to show electrocardiogram；Also include pre-amplifier unit, including N-channel junction type low noise FET,
The parallel branch that operational amplifier, N-channel junction type low noise FET concatenation operation amplifier amplifier, Rf and Cf are formed,
Drawn from the output end of integrated operational amplifier and feed back signal to input, amplifier is formed Shunt negative feedback circuit, Q is field
The common source amplifying stage that effect pipe is formed, Q operating point and grid voltage are determined by V0 and Rf selection.
Further embodiment, in addition to R11 and R12 are connected in parallel operational amplifier.
Further embodiment, described R11 and R12 are adjustable rheostat.
Further embodiment, described operational amplifier are THS4011.
Further embodiment, the output of described pre-amplifier unit export for two level.
Further embodiment, the wherein output of described two level, one-level output energy, two level output timing are believed
Number.
Further embodiment, described feedback capacity Cf=1pF.
3rd, the beneficial effects of the utility model.
The utility model proposes a kind of cardiographic detector, small-signal is difficult in some patientss electrocardio measurement process of solution
The problem of acquisition, the precision of the measurement of raising, and it is simple in construction, cheap, can be with generally applicable.
Brief description of the drawings
Fig. 1 is the theory diagram of cardiographic detector.
Fig. 2 is the longitudinal profile schematic diagram of cardiographic detector sensor.
Fig. 3 is the structural representation of cardiographic detector sensor diaphragm of the present utility model.
Fig. 4 is system construction drawing of the present utility model.
Embodiment
Embodiment 1
Fig. 1 is the theory diagram of the utility model cardiographic detector, and cardiographic detector includes ECG detecting unit 1, electrocardio
Signal processing unit 2, terminal diaplay unit 3, wherein ECG detecting unit 1 are used to gather electrocardiosignal, send to electrocardiosignal
Processing unit 2；ECG's data compression unit is used for processing cardioelectric signals, and treated electrocardiosignal is sent to terminal and shows list
Member 3；Terminal diaplay unit is used to show electrocardiogram.
Fig. 2 is the longitudinal profile schematic diagram of cardiographic detector sensor, and ECG detecting unit may include according to being actually needed
One or more sensor 4.Sensor 4 includes housing 5 and diaphragm 6, connection of being insulated between diaphragm 6 and piezoelectric element 7.Shown in Fig. 2,
Piezoelectric element 7 is fastened on the diaphragm 6 by adhesive 11, and welding etc. also can be selected, and other are fastenedly connected mode.Diaphragm 6 is led
Electric layer 8 is connected with wire 9, and diaphragm includes that resist warping basement membrane 10 and conductive layer 8, and conductive layer 8 is uniformly arranged on that resist warping basement membrane 10
Surface.
Embodiment 2
As shown in figure 3, in order to ensure charge sensitive preamplifier have higher signal to noise ratio and compared with time response, electricity
Line structure is simple, and is easy to miniaturization and highly integrated, and we, which are employed before integrated operational amplifier forms electric charge, discharges road.
In view of the requirement such as fast response time, bandwidth, low-power consumption, we have selected the 290MHz low distortions high speed that TI companies produce
Operational amplifier THS4011 forms amplifying stage.In order to reduce the noise of whole charge sensitive preamplifier, we have chosen N
Channel junction low noise FET 2SK152 is as the input stage put before electric charge, it can be seen that, put before the electric charge by two-stage electricity
Road forms, in order to improve the stability of circuit, and also to increase charge sensitive preamplifier out-put dynamic range, circuit
Working power our use ± 12V power supplys.In order to meet practical application and standardization, two outputs of the circuit design, one
Individual is energy（E）Output, for spectral measurement；Another is timing signal（T）Output, for time measurement.Rf in circuit
The parallel branch formed with Cf, drawn from the output end of integrated operational amplifier and feed back signal to input, form amplifier
Shunt negative feedback circuit.
Q is the common source amplifying stage that FET is formed, and Q operating point and grid voltage are determined by V0 and Rf.Rf is as level
Between negative feedback resistor, the mainly stable quiescent point of effect herein, and the leakage current and Cf for the detector that can release
On electric charge.Circuit can be by changing R11 and R12 size come regulation state operating point.Change R11 and R12 size, in order to
Put before charge-sensitive with relatively low noise so that VDS is about that+1.1V, VGS are about -0.8V.In this design, we can be with
Different Cf is selected, reaches the purpose that charge sensitivity is put before changing.
Claims (7)
1. a kind of cardiographic detector, including ECG detecting unit, ECG's data compression unit, terminal diaplay unit, wherein described
ECG detecting unit is used to gather electrocardiosignal, sends to the ECG's data compression unit；The ECG's data compression unit
For handling the electrocardiosignal, treated electrocardiosignal is sent to the terminal diaplay unit；The terminal display is single
Member is used to show electrocardiogram；Also include pre-amplifier unit, including N-channel junction type low noise FET, operational amplifier, N
The parallel branch that channel junction low noise FET concatenation operation amplifier amplifier, Rf and Cf are formed, puts from integrated computation
The output end of big device, which is drawn, feeds back signal to input, amplifier is formed Shunt negative feedback circuit, and Q is that FET is formed
Common source amplifying stage, Q operating point and grid voltage are determined by V0 and Rf selection.
2. cardiographic detector according to claim 1, it is characterised in that：Also operation amplifier is connected in parallel including R11 and R12
Device.
3. cardiographic detector according to claim 2, it is characterised in that：Described R11 and R12 is adjustable rheostat.
4. cardiographic detector according to claim 1, it is characterised in that：Described operational amplifier is THS4011.
5. cardiographic detector according to claim 1, it is characterised in that：The output of described pre-amplifier unit is two level
Output.
6. cardiographic detector according to claim 5, it is characterised in that：Described two level output, wherein one-level output energy
Amount, two level output timing signal.
7. cardiographic detector according to claim 1, it is characterised in that：Described feedback capacity Cf=1pF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621341453.1U CN206700161U (en) | 2016-12-08 | 2016-12-08 | A kind of cardiographic detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621341453.1U CN206700161U (en) | 2016-12-08 | 2016-12-08 | A kind of cardiographic detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206700161U true CN206700161U (en) | 2017-12-05 |
Family
ID=60471916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621341453.1U Expired - Fee Related CN206700161U (en) | 2016-12-08 | 2016-12-08 | A kind of cardiographic detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206700161U (en) |
-
2016
- 2016-12-08 CN CN201621341453.1U patent/CN206700161U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171205 Termination date: 20211208 |