CN111513705B - Calibrating device for physiological potential monitoring equipment calibrating instrument - Google Patents
Calibrating device for physiological potential monitoring equipment calibrating instrument Download PDFInfo
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- CN111513705B CN111513705B CN202010227833.7A CN202010227833A CN111513705B CN 111513705 B CN111513705 B CN 111513705B CN 202010227833 A CN202010227833 A CN 202010227833A CN 111513705 B CN111513705 B CN 111513705B
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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
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
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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
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/369—Electroencephalography [EEG]
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0223—Operational features of calibration, e.g. protocols for calibrating sensors
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention provides a calibrating device for a physiological potential monitoring equipment calibrating instrument, which comprises: the programmable lead switch comprises a signal input end, a signal output end and a control end; the data acquisition device is electrically connected with the signal output end; the main control computer is electrically connected with the data acquisition device; the main control computer is also electrically connected with the control end; the signal input end is used for receiving an analog signal of the physiological potential monitoring equipment calibrating instrument, the data acquisition device converts the received analog signal into a digital signal, the main control computer analyzes and processes the received digital signal through the digital signal, and the analysis result is displayed on the display screen; the programmable lead switch controls the open-close state of the signal input end according to the control instruction. The invention has the advantages that: the line is not required to be replaced frequently in the calibration process, so that automatic line replacement operation in the calibration process is realized; and a single instrument is used for replacing a plurality of instruments, so that equipment investment is saved, the functional integration level is high, and the use is convenient.
Description
[ field of technology ]
The invention relates to the field of medical and health protection equipment, in particular to a calibration device for a physiological potential monitoring equipment calibrating instrument.
[ background Art ]
The physiological potential monitoring device includes: electrocardiograph, electroencephalograph, electrocardiograph monitor, etc. are widely used in hospitals and medical health supervision institutions, while physiological potential monitoring equipment calibrating devices are used for magnitude transmission and tracing of the physiological potential monitoring equipment, and in order to ensure that the magnitude of the physiological potential monitoring equipment calibrating devices is accurate and reliable, metering calibration needs to be carried out on the physiological potential monitoring equipment calibrating devices. When the daily verification and calibration is carried out on the verification instrument, the number of signal terminals of the verification instrument is as large as 10, and when the verification is carried out on different projects, the wiring needs to be replaced frequently, so that the verification efficiency is affected, meanwhile, the wiring replacing process is easy to cause artificial misoperation, more importantly, the signal amplitude output by the calibrated equipment is generally smaller, and larger measurement error is easy to be introduced by the contact thermoelectric voltage between the test wire and the calibrated signal terminals during the manual wiring.
The existing calibration equipment adopts: the calibrating device of the physiological potential monitoring equipment calibrating instrument is constructed by the equipment such as (1) a direct current digital voltmeter, (2) an alternating current digital voltmeter, (3) an ohm meter, (4) a pulse amplitude measuring device or an ultralow frequency peak voltage meter, (5) a digital storage oscilloscope, (6) a universal counter, and (7) a distortion measuring instrument.
The existing calibration means have the following disadvantages: (1) Because of the large number of related calibration projects, a large number of special equipment is needed, so that the input cost of instruments and equipment is high, and the calibration efficiency is low; (2) The calibration can be completed by complex function setting of a standard instrument for calibration; (3) The wiring needs to be replaced manually and frequently in the calibration process, so that misoperation of the wiring is easy to cause; (4) The manual wiring is easy to introduce additional parasitic potential, and influences the measurement result; (5) there is a higher demand for the output signal of the device being calibrated.
[ invention ]
The invention aims to solve the technical problem of providing a calibrating device for a physiological potential monitoring equipment calibrating instrument, which is free from frequent replacement of wiring and convenient to operate.
The invention is realized in the following way: a calibration device for a physiological potential monitoring device verification instrument, comprising:
the programmable lead switch comprises a signal input end, a signal output end and a control end;
the data acquisition device is electrically connected with the signal output end;
the main control computer is electrically connected with the data acquisition device;
the main control computer is also electrically connected with the control end; the signal input end is used for receiving an analog signal of the physiological potential monitoring equipment calibrating instrument, the data acquisition device is used for converting the received analog signal into a digital signal, and the main control computer is used for analyzing and processing the digital signal and displaying an analysis result on the display screen; the control end receives a control instruction sent by the main control computer, the programmable lead switch controls the opening and closing states of the signal input ends according to the control instruction, and the signal input ends are provided with a plurality of signal input ends.
Further, the programmable lead switch further comprises an MCU, a first relay and a second relay, one signal input end is correspondingly and electrically connected with the first relay and the second relay, the signal output end is divided into a first signal output end and a second signal output end, the first relay is electrically connected with the first signal output end, and the second relay is electrically connected with the second signal output end; or the first relay is electrically connected with the second signal output end, and the second relay is electrically connected with the first signal output end; the MCU is used for controlling and connecting all the first relays and the second relays, and the MCU transmits the control instruction to the first relays and the second relays through the control end so as to control the opening and closing of the first relays and the second relays.
Further, the programmable lead switch further comprises a first indicator light and a second indicator light, wherein the first indicator light is electrically connected with the first relay, and the second indicator light is electrically connected with the second relay.
Further, the programmable lead switch further comprises a reference voltage source, wherein the positive end of the reference voltage source is electrically connected with the other first relay, and the negative end of the reference voltage source is electrically connected with the other second relay.
Further, the main control computer and the control end are in communication connection by adopting conversion of USB and serial ports.
Further, the data collector uses a digital sampling voltmeter.
Further, the physiological potential monitoring device calibrator is one of an electrocardiograph calibrator, an electrocardiograph monitor calibrator and an electroencephalogram calibrator.
Further, ten signal input ends are respectively marked as N, R, L, F, C1, C2, C3, C4, C5 and C6; the first signal output is labeled P1 and the second signal output is labeled P2.
The invention has the advantages that: after the signal input end of the programmable lead switch is connected with the signal terminal of the physiological potential monitoring equipment verification instrument, frequent line replacement is not needed in the calibration process; according to the operation of the main control computer, the opening and closing states of the signal input ends are automatically switched; the data acquisition device acquires analog signals of verification items of the physiological potential monitoring equipment verification instrument, converts the analog signals into digital signals, transmits the digital signals to the main control computer, and the main control computer analyzes and processes the received digital signals to display waveform and parameter analysis results on the display screen; a digital sampling voltmeter is used for replacing seven traditional special instruments to form a novel calibration device, so that equipment investment is saved; the functional integration level is high, and the use is convenient.
[ description of the drawings ]
The invention will be further described with reference to examples of embodiments with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the calibration device of the present invention.
Fig. 2 is a schematic diagram of the connection of the calibration device of the present invention to a physiological potential monitoring device calibrator.
Fig. 3 is a functional block diagram of a programmable lead switch in the present invention.
Fig. 4 is a schematic diagram of the connection of the signal input terminal, the relay and the signal output terminal in the present invention.
Fig. 5 is a schematic diagram of an MCU module with a programmable lead switch according to the present invention.
Fig. 6 is a schematic diagram of a communication module of the programmable lead switch of the present invention.
Fig. 7 is a schematic diagram of a power conversion circuit of a programmable lead switch according to the present invention.
Fig. 8 is a schematic diagram of a relay driving circuit of a programmable lead switch in the present invention.
Fig. 9 is a schematic diagram of a relay status monitoring circuit for a programmable lead switch in accordance with the present invention.
The marks in the figure: the programmable lead switch 100, the signal input end 101, the signal output end 102, the control end 103, the MCU104, the first relay 105, the second relay 106, the first indicator lamp 107, the second indicator lamp 108, the reference voltage source 109, the data acquisition unit 200, the main control computer 300, the display screen 301 and the physiological potential monitoring equipment verification instrument 400.
[ detailed description ] of the invention
The embodiment of the invention solves the technical problem of frequent wire replacement during calibration in the prior art by providing the calibration device for the physiological potential monitoring equipment calibrating instrument, and realizes the technical effect of automatic wire replacement operation; meanwhile, the digital analog signals are digitized, and digital signal analysis and processing technology is applied, so that the measurement function of a plurality of special instruments is realized, and the functions of a plurality of traditional instruments can be realized by utilizing a single data acquisition device.
The technical scheme in the embodiment of the invention aims to solve the problems, and the overall thought is as follows: after the signal input end of the designed programmable lead switch is connected with the signal terminal of the physiological potential monitoring equipment verification instrument, frequent line replacement is not needed in the calibration process; according to the operation of the main control computer, the opening and closing states of the signal input ends are automatically switched, and the automatic line changing operation in the calibration process is realized; the method comprises the steps of collecting analog signals of verification items of a physiological potential monitoring equipment verification instrument, converting the analog signals into digital signals, transmitting the digital signals to a main control computer, and displaying waveform and parameter analysis results on a display screen by analyzing and processing the received digital signals by the main control computer.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 9, a preferred embodiment of the calibration device for a physiological potential monitoring device verification apparatus of the present invention. The invention comprises the following steps: a programmable lead switch 100 comprising a signal input 101, a signal output 102 and a control 103; the data collector 200 is electrically connected with the signal output end 102; the main control computer 300 is electrically connected with the data acquisition unit 200; the main control computer 300 is also electrically connected with the control end 103; the signal input 101 is configured to receive an analog signal of the physiological monitor device calibration apparatus 400. The signal input 101 of the programmable lead switch 100 is connected with the signal terminal of the physiological potential monitoring device verification instrument 400, and these analog signals are the signals of the verification instrument for verification projects. Reference standards "electrocardiograph calibrator (JJG 749) and" electrocardiograph calibrator (JJG 1016) "are as follows:
the data collector 200 converts the received analog signals into digital signals, the main control computer 300 analyzes and processes the received digital signals, and the waveform and parameter analysis results are displayed on the display screen 301; that is, the calibration personnel can see the analysis results of the signal waveform diagrams and parameters of the verification items on the display screen 301 of the main control computer 300. The control terminal 103 receives a control instruction sent by the main control computer 300, the programmable lead switch 100 controls the open/close states of the signal input terminals 101 according to the control instruction, and the signal input terminals 101 are plural. When calibration of one item is completed, a calibrator operates on the main control computer 300, the main control computer 300 sends out a control instruction for the calibration of the next item, and the programmable lead switch 100 adjusts the on or off of the signal input end 101 of the wiring according to the control instruction; the next item of calibration signal waveform and parameter analysis results are then displayed on the display screen 301 of the host computer 300. The automatic wire replacement operation in the calibration process is realized, and the operation that the corresponding special instrument needs to be replaced to frequently replace the wiring when different projects are calibrated in the prior art is avoided.
The programmable lead switch 100 further comprises an MCU104, a first relay 105 and a second relay 106, one of the signal input terminals 101 is correspondingly and electrically connected with one of the first relay 105 and the second relay 106, and ten signal input terminals 101 are respectively marked as N, R, L, F, C, C2, C3, C4, C5 and C6; i.e. ten first relays 105 and ten second relays 106. The signal output 102 is divided into a first signal output and a second signal output, the first signal output is denoted as P1, and the second signal output is denoted as P2. The first relay 105 is electrically connected with the first signal output end, and the second relay 106 is electrically connected with the second signal output end; or alternatively, the first relay 105 is electrically connected to the second signal output terminal, and the second relay 106 is electrically connected to the first signal output terminal; the MCU104 controls and connects all the first relays 105 and the second relays 106, and the MCU104 transmits the control command to the first relays 105 and the second relays 106 through the control terminal 103, so as to control the opening and closing of the first relays 105 and the second relays 106. One signal input 101 may be in communication with both the first signal output and the second signal output. The first relay and the second relay which are connected with one signal input end are set to be incapable of being closed at the same time, namely three relay working states exist for one signal input end: (1) both the first relay and the second relay are disconnected; (2) the first relay is closed and the second relay is opened; (3) the first relay is open and the second relay is closed. In calibrating a program, two signal inputs, such as signal input N and signal input R, are required; when the signal input end N is communicated with the first signal output end P1 through the first relay, the signal input end R can only be communicated with the second signal output end P2 through the second relay; when the signal input terminal N communicates with the second signal output terminal P2 through the second relay, the signal input terminal R can communicate with the first signal output terminal P1 only through the first relay.
MCU104 adopts ARM chip STM32, and STM32 is a powerful 32 bit singlechip, and its model is STM32F103RBT6, and its circuit diagram is shown in FIG. 5. The main control computer 300 is in communication connection with the control end 103 by adopting conversion of USB and serial ports; the FT232R is adopted to complete the conversion between the USB and the serial port, and the circuit is shown in figure 6; FT232R is a chip of a USB to serial UART interface. The programmable lead switch 100 further comprises a power supply conversion circuit, wherein a DC-DC conversion chip TPS5430 is selected to realize 12-24V to +5V direct current level conversion, and the circuit is shown in FIG. 7; power is supplied to the various electronic components of programmable lead switch 100.
The programmable lead switch 100 further includes a first indicator light 107 and a second indicator light 108, the first indicator light 107 is electrically connected to the first relay 105, and the second indicator light 108 is electrically connected to the second relay 106. The indicator light is used for indicating the opening and closing states of the corresponding relay, so that the indicator light is convenient for a calibrator to recognize. The first indicator lamp 107 and the second indicator lamp 108 respectively display different colors.
The programmable lead switch 100 further comprises a reference voltage source 109, the positive terminal of the reference voltage source 109 being electrically connected to the further first relay 105, the negative terminal of the reference voltage source 109 being electrically connected to the further second relay 106. For a reference voltage source, there are two relay operating states: (1) both the first relay and the second relay are disconnected; (2) both the first relay and the second relay are closed. The reference voltage source is provided for later extended functionality use.
The relay is a TXS2-2-4.5V type magnetic latching relay of a loose company, and the contact thermoelectric voltage of the relay is low, and the contact impedance is less than 50mΩ. All relays of programmable lead switch 100 use ULN2003 driver chips. ULN2003 is a high withstand voltage, high current composite transistor array, which is composed of seven silicon NPN composite transistors, and a diode for eliminating counter electromotive force of coil is integrated in the interior, which can be used to drive a relay; the relay driving circuit is shown in fig. 8. The state monitoring of the relay employs a bi-color LED to indicate the switching state of the relay. Because of the two-way cross design, each relay can realize that the signal input is independently connected with two signal output ends respectively, and the two signal output ends are distinguished by a double-color indicator lamp, and the state monitoring circuit is shown in figure 9.
The data collector 200 uses a digitally sampled voltmeter. The digital sampling voltmeter has the functions of acquiring analog signals and converting the analog signals into digital signals. The data collector 200 of the calibration device may also be a digital multimeter, such as a KEYSIGHT digital multimeter, model 34470A. The input end of the data collector 200 is connected with the first signal output end P1 and the second signal output end P2 of the programmable lead switch 100, and the output end of the data collector 200 is connected with the main control computer 300 through a USB line.
The physiological potential monitoring device calibrator 400 is one of an electrocardiograph calibrator, an electrocardiograph monitor calibrator, and an electroencephalogram calibrator. The signal terminals of these certification instruments have the labels N, R, L, F, C, C2, C3, C4, C5, C6 so as to correspond to the respective signal inputs 101 of the programmable lead switch 100, and after one wiring, which signal inputs 101 are used is selected by operation on the host computer 300 according to the certification calibration program. For example, for the electrocardiograph verification device, when the voltage measurement lead conversion normality check is calibrated, the signal terminals N, R, L, F, C1, C2, C3, C4, C5 and C6 of the electrocardiograph verification device are required to be used, and then the calibrator operates the main control computer 300 to generate control instructions to the MCU104 of the programmable lead switch 100, so that the MCU104 controls the signal input terminal N of the programmable lead switch 100 to switch on the first signal output terminal P1 through the first relay 105, and the signal input terminals R, L, F, C1, C2, C3, C4, C5 and C6 to switch on the second signal output terminal P2 through the second relay 106 in sequence, and only two signal input terminals are used at a time; thus, the analog signal of the electrocardiograph verification instrument enters the data collector 200 through the programmable lead switch 100, the data collector 200 converts the analog signal into a digital signal, the digital signal is analyzed and processed through the main control computer 300, and the obtained waveform diagram and the parameter analysis result are sequentially displayed on the display screen 301. If polarity inversion is required, the MCU104 controls the signal input terminal N of the programmable lead switch 100 to switch on the second signal output terminal P2 through the second relay 106, and the signal input terminals R, L, F, C, C2, C3, C4, C5, C6 switch on the first signal output terminal P1 through the first relay 105 in sequence, and also only two signal input terminals are used at a time.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the invention, and that equivalent modifications and variations of the invention in light of the spirit of the invention will be covered by the claims of the present invention.
Claims (6)
1. A calibration device for a physiological potential monitoring device verification instrument, comprising:
the programmable lead switch comprises a signal input end, a signal output end and a control end;
the data acquisition device is electrically connected with the signal output end;
the main control computer is electrically connected with the data acquisition device;
the main control computer is also electrically connected with the control end; the signal input end is used for receiving an analog signal of the physiological potential monitoring equipment calibrating instrument, the data acquisition device is used for converting the received analog signal into a digital signal, and the main control computer is used for analyzing and processing the digital signal and displaying an analysis result on the display screen; the control end receives a control instruction sent by the main control computer;
the programmable lead switch further comprises an MCU, a first relay and a second relay, one signal input end is correspondingly and electrically connected with the first relay and the second relay, the signal output end is divided into a first signal output end and a second signal output end, the first relay is electrically connected with the first signal output end, and the second relay is electrically connected with the second signal output end; or the first relay is electrically connected with the second signal output end, and the second relay is electrically connected with the first signal output end; the MCU is used for controlling and connecting all the first relays and the second relays, and transmitting the control instruction to the first relays and the second relays through the control end so as to control the opening and closing of the first relays and the second relays;
ten signal input ends are respectively marked as N, R, L, F, C1, C2, C3, C4, C5 and C6; the first signal output end is marked as P1, and the second signal output end is marked as P2;
the first relay and the second relay which are connected with one signal input end cannot be closed at the same time;
when in calibration, only two signal input ends are used, wherein one signal input end is communicated with the first signal output end through the first relay, and the other signal input end is communicated with the second signal output end through the second relay; if polarity is required to be turned, one signal input end is communicated with the second signal output end through the second relay, and the other signal input end is communicated with the first signal output end only through the first relay.
2. The calibration device for a physiological potential monitoring device verification instrument of claim 1, wherein the programmable lead switch further comprises a first indicator light electrically connected to the first relay and a second indicator light electrically connected to the second relay.
3. A calibration device for a physiological potential monitoring device verification instrument according to claim 1, wherein the programmable lead switch further comprises a reference voltage source, a positive terminal of the reference voltage source being electrically connected to the further first relay, and a negative terminal of the reference voltage source being electrically connected to the further second relay.
4. The calibration device for a physiological potential monitoring device calibration instrument of claim 1, wherein the host computer is communicatively coupled to the control terminal via USB to serial port conversion.
5. A calibration device for a physiological monitor verification instrument according to claim 1, wherein the data acquisition unit uses a digital sampling voltmeter.
6. A calibration device for a physiological potential monitoring device calibrator as defined in claim 1, wherein said physiological potential monitoring device calibrator is one of an electrocardiograph calibrator, and an electroencephalograph calibrator.
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