CN204989330U - Medical treatment electrical equipment security testing arrangement - Google Patents
Medical treatment electrical equipment security testing arrangement Download PDFInfo
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- CN204989330U CN204989330U CN201520456596.6U CN201520456596U CN204989330U CN 204989330 U CN204989330 U CN 204989330U CN 201520456596 U CN201520456596 U CN 201520456596U CN 204989330 U CN204989330 U CN 204989330U
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Abstract
The utility model relates to a medical treatment electrical equipment security testing arrangement, testing arrangement include withstand voltage check out test set, hourglass current detection equipment, electric energy quality test equipment, ground resistance check out test set to and keyboard module, alarm and computer, the signal output part of each check out test set all through interface adapter and the signal input part of computer connects for to detect data transmission to computer, the control output separately -driven of computer connects each check out test set for according to the detected signal of keyboard module input, the work of the corresponding functional module of output sense order -driven, the computer still drive the connection alarm. The utility model discloses an integrate, miniaturized technique, can be simultaneously detect medical equipment power consumption environment and medical equipment's self electric property, realize multifunction, easy and simple to handle, the centralized management control of being convenient for.
Description
Technical field
The utility model relates to a kind of medical electronic equipment security test device.
Background technology
The feature of medical electrical equipment is that instrument is closely related with human body.Most medical electronic apparatus is in order to obtain human body information or to certain effect of human body, instrument closely be connected together work with human body.Like gastrocopy and cardia catheterization, will put into human body instrument within a certain period of time, also having as burying type pacemaker, needing to be placed in human body for a long time.The target of medical electrical equipment is patient, and patient may be in very fragile state; Or patient may recognize danger, or can not danger be judged, even if or feel that danger can not be broken away from; Or the patient had suffer from the disease resistibility itself that stimulate to external world and reduce, have due to Diagnosis and Treat, external stimulation is easy to cause worse impact.Such as, heart patient will cause ventricular fibrillation with very little electric current, when inserting cardiac catheter, even Weak current is also easy cause ventricular fibrillation because shocking by electricity.When there is dyshaemia, when the heat added can not be scattered rapidly, even if at a lower temperature, also easily cause low temperature thermal burn.
When several medical electrical equipments be associated in simultaneously a patient combinationally use with it time, be not only just the existing safety problem of each instrument itself, the new problem derived from because combinationally using in addition.When instrument combination uses, the most easily cause shock hazard.All specified standard is reached when instrument is used alone, but just likely exceeding allowable value scope once combine, also having electric current to flow into from body surface, passing through body, flow out and the strong electrical shock of generation from body surface, it is attended by the danger causing ventricular fibrillation and second accident again.When the therapy apparatus of especially big energy and accurate medical electric testing instrument and the used time, fine measuring instrument can not carry out by the impact that therapy apparatus exports measure or make a mistake output and malfunction, causes instrument damage, indirectly jeopardizes the safety of patient.When relying on the measurement data of accurate medical electrical equipment to carry out diagnosis and treatment, the inaccurate and distortion of the output information of surveying instrument jeopardizes safe major issue.
The quality of power supply is the key factor affecting medical electronic equipment safe operation, the quality of power supply goes back the unified definition of neither one at present, and International Electrotechnical Commission IEC standard is definition like this to the quality of power supply: the quality of power supply refers to that electric supply installation does not interrupt using with interference user the physical characteristics of electric power in normal operating conditions.The so-called quality of power supply is in fact the concentrated reflection of summation in electrical network of various single disturbance and energy imbalance, and it is it is emphasised that influencing each other between electrical network and consumer.IEEE (IEEE) defines the quality of power supply: the qualified of the quality of power supply refers to that the earthed system of electric power and the device being supplied to sensitive equipment can make this equipment working properly.
The operation of Medical Devices will use alternating current, and the power supply system of national grid continues to carry a large amount of electric energy to hospital.In desirable power supply system, electric energy is powered to hospital with the three-phase equilibrium sinusoidal voltage of constant frequency (50Hz or 60Hz) and amplitude, but the power supply system in actual motion can be polluted, even be heavily polluted, the order of severity of China's electric pollution is never second to environmental pollution.Society's process of industrialization accelerates rapidly the propagation that the development of main facilities (metallurgical industry, chemical industry and the electric railway etc.) exacerbates electric pollution; Nonlinear-load in power supply system, impact load make non-linear (harmonic wave) of power network, asymmetry (negative phase-sequence) and undulatory property be on the rise, be transported to the amplitude of the three-phase voltage of hospital, frequency and phase differential and no longer keep constant, waveform is no longer single sine wave.The quality of power supply that electric pollution causes declines, and the safe operation index of Medical Devices is significantly reduced, and the failure rate of Medical Devices obviously increases, and has had a strong impact on clinical diagnosis and treatment work.
The quality of power supply declines two kinds of situations: one is large-scale, relates to whole hospital; Another kind is the several section office being in certain electricity consumption branch road together.When power supply system be transported to hospital be the electric power polluted time, the decline of the quality of power supply is general character on the impact that full institutes has Medical Devices to produce, and involve a wide range of knowledge, the Medical Devices kind broken down and quantity are all many, and this is the first situation.The construction machinery that when the second situation is construction in hospital, transformation, finishing, many power consumptions are large disorderly connects power supply disorderly, local electricity consumption branch road electric energy is caused to decline, the Medical Devices be connected on this branch road will be had a strong impact on: when large-tonnage hoister is opened, cause the work of an automatic clinical chemistry analyzer to be paralysed; Powerful windlass makes several the equipment such as the blood gas analyzer of clinical laboratory work; A high-grade color ultrasound does cardiac work up to patient, and cutting machine, electric welding machine etc. that same floor carries out decoration construction are all gone into battle, and patient does not also check out, and color ultrasound machine just have failed, and in machine, one piece of signal-processing board being worth more than 10 ten thousand yuan has been broken.
The reality of electric pollution is not also generally familiar with in China, the seriousness of power quality problem does not more come into one's own, once power quality is poor, very easily cause Medical Devices in hospital to break down again and again, it is that equipment is fixed a breakdown that engineers is hurried back and forth heap of times in each section office, and a large amount of human and material resources and fund have all consumed in the process afterwards of this fault.Serious causes loss of data, hardware damage, and especially make the safe operation index of the Medical Devices to quality of power supply sensitivity significantly reduce, the failure rate of Medical Devices obviously increases, and has had a strong impact on clinical diagnosis and treatment work.
Along with introduction and the use of various advanced Medical Devices, various electronic circuit and Power Electronic Technique are in the application of modern hospital, and biomedical engineering role in modern hospital is more and more important.The update of Medical Devices is maked rapid progress, thus the electromagnetic environment of hospital is caused to there occurs very big change, if lack the suitable precautionary measures, the normal operation of new equipment system may be subject to the threat of potential humorous wave interference, and then the benefit that reduction new equipment brings.
Signal due to Medical Devices is general more weak, if be interfered, mistaken diagnosis will be caused in a kind of distortion (harmonic wave) being similar to some pathology of the upper superposition of testing result (as waveform, figure, image), also can cause microshock simultaneously, time serious, also may cause the life danger of those who are investigated.If with the medical instrument and equipment of computer system, when the spike interference magnitude in common mode interference reaches 2-50V, during time remaining number microsecond, computer logic mistake, information dropout etc. can be caused.High-intensity magnetic field can make kinescope, x-ray image intensifier tube show anamorphose distortion; Accelerator ray deflection; Computer disk, magnetic card record data corruption; Lung ventilator work is malfunctioning; Heart heartstart operational failure etc.
Aging and the newly-built medical building of electricity consumption pipe network due to Partial Hospitals does not make corresponding consideration to newly-increased medical electrical equipment and system for the requirement of electromagnetic environment, causes new medical electrical equipment must make its Electro Magnetic Compatibility and considers and carry out reliability design comprehensively.In the mandatory industry standard YO505 1 " medical electrical equipment the 1 one 2 part: safety general requires a standard arranged side by side: electromagnetic compatibility one requires and tests " of the medicine equipment that on April 1st, 2007 formally comes into effect, 3 emission experiment and 7 immunity tests are proposed to medical electrical equipment, and the suppressing method that product resists thousand to disturb mainly contains three kinds, i.e. ground connection, shielding and filtering.These three kinds of methods not only have its respective unique effect in the design of circuit and system, and be mutually related again: good ground connection can reduce equipment to shielding and the requirement of filtering, contrary, good shielding also can make the requirement of filtering lower, and filtering itself can reduce the Conduction Interference of equipment simultaneously and improve the immunity to interference of equipment.
In the application technology ensureing medical electrical equipment safe operation, what generally adopt now is for the ground connection of equipment itself, shielding and filtering.Such as the medical electrical equipment adopting high-frequency work mode; as electric knife, ultra-short wave therapy apparatus, electric field treatment instrument etc.; multipoint earthing mode is adopted can effectively to reduce its electromagnetic interference (EMI) in its high-frequency circuit part; the personal safety protection of personnel can not only be realized, the effect of the electrostatic charge of releasing on cabinet and raising equipment job stability can also be played simultaneously.Magnetic interference is insensitive for most of equipment, but then may produce serious influence for as medical electric systems such as nuclear magnetic resonance imaging system, electron microscope, biological brain wave scanners.In medical electrical equipment and system, the shielding in power frequency magnetic field and very low frequency (VLF) magnetic field is mainly taked to the design that Sensitive Apparatus ferrimagnet is wrapped.And utilize the reflection loss of metal material (as metal chassis shield) and attenuation by absorption mechanism can play the propagation of prevention electromagnetic field in space.And the employing of power line filter can suppress to import the high frequency interference (i.e. common mode interference) of ground wire by phase line, the neutral line and led the high frequency interference (i.e. differential mode interference) of people's neutral line by phase line simultaneously.
China is very strict to medicine equipment management and control, establishes a series of mandatory country and industry standard, has higher requirement to medical electrical equipment from being designed into production procedure to quality inspection to use code.But standard mainly for be medical electrical equipment itself and its initial working environment, and the external action that may cause after contingent external environment change in equipment use process and ageing equipment seldom to be taken into account.Meanwhile, after medical electrical equipment is installed and used, its annual calibration operation generally can complete at the scene, and the equipment large-scale for some is all the more so.And the calibrating installation of the medical electrical equipment related at present is substantially all Laboratory Instruments, portability is not enough, the calibration operation difficulty of medical electrical equipment is strengthened, is left in the basket even, also brings hidden danger to the safe operation of medical electronic equipment to a certain extent.
Utility model content
The purpose of this utility model is to provide a kind of medical electronic equipment security test device, proving installation of the present utility model is integrated with power quality analysis, leakage current test, insulating resistance measuring and resistance test, adopt miniaturization, Integration Design, can detect the electric property of Medical Devices power utilization environment and Medical Devices self simultaneously, easy and simple to handle, centralized management controls.The mode of single detection is adopted in order to solve the existing proving installation on-the-spot for medical treatment, complex operation, centralized management cannot be unified, portability is poor, the calibration operation difficulty of medical electrical equipment is strengthened, be left in the basket even, also to a certain extent the safe operation of medical electronic equipment brought to the problem of hidden danger.
For achieving the above object, scheme of the present utility model is: a kind of medical electronic equipment security test device, described proving installation comprises the withstand pressure detection device for carrying out high voltage test to medical electronic equipment, for carrying out the leakage current test equipment of leakage current test to medical electronic equipment, for the Power Quality Detection equipment detected the quality of power supply in Medical Treatment Room, for measuring the insulating resistance measuring equipment of medical electronic equipment inner ground resistance, and for inputting the keyboard of detection signal, for detect potential safety hazard alarm alarm and for the computing machine to the instruction of above-mentioned each checkout equipment output detections, described withstand pressure detection device, leakage current test equipment, Power Quality Detection equipment, the signal output part of insulating resistance measuring equipment is all connected by the signal input part of interface adapter with described computing machine, the control output end of described computing machine drives connection withstand pressure detection device respectively, leakage current test equipment, Power Quality Detection equipment and insulating resistance measuring equipment, for the detection signal inputted according to Keysheet module, the work of output detections order-driven the corresponding function module, described computing machine also drives connection alarm.
According to medical electronic equipment security test device described in the utility model, described proving installation comprises display, and described display is connected to the drive singal output terminal of computing machine.
According to medical electronic equipment security test device described in the utility model, described Power Quality Detection equipment comprises voltage input sample circuit, electric current input sampling circuit, sampling hold circuit, A/D change-over circuit and single-chip microcomputer, mains voltage signal to be measured is after rectifying and wave-filtering process, access the input end of described voltage input sample circuit, the signal output part of described voltage input sample circuit connects the analog input end of A/D change-over circuit by sampling hold circuit, the digital output end of A/D change-over circuit connects the data-in port of described single-chip microcomputer, the data-out port of described single-chip microcomputer is connected with the signal input part of described computing machine by RS232 or the RS485 interface with infrared ray light-coupled isolation.
According to medical electronic equipment security test device described in the utility model, described voltage input sample circuit adopts resistor voltage divider circuit, and the input end of described voltage input sample circuit connects building-out capacitor.
According to medical electronic equipment security test device described in the utility model, described leakage current test equipment is primarily of leakage current test circuit, sample circuit, amplifying circuit, A/D converter, comparer, control circuit and single-chip microcomputer composition, the input end of described leakage current test circuit connects the leakage current test lead of electrical equipment to be tested, the output terminal of described leakage current test circuit connects sample circuit, the output terminal of sample circuit connects the analog input end of A/D converter by amplifying circuit, the digital output end of described A/D converter connects single-chip microcomputer, the computing machine described in signal output part connection of described single-chip microcomputer, an input end of described comparer connects the digital output end of A/D converter, leakage current signal is preset in another input end access of described comparer, the signal output part connection control circuit of described comparer, the signal output part of described control circuit connects computing machine.
According to medical electronic equipment security test device described in the utility model, described insulating resistance measuring equipment is by current feedback circuit, resistance measuring circuit, A/D converter and single-chip microcomputer composition, the signal input part of described current feedback circuit connects computing machine, the input end of the signal output part contact resistance metering circuit of described current feedback circuit, the input end of described resistance measuring circuit also connects the two ends of testing resistance, the output terminal of described resistance measuring circuit connects single-chip microcomputer by A/D converter, the output terminal of described single-chip microcomputer connects computing machine, the control output end of described computing machine connects current feedback circuit.
According to medical electronic equipment security test device described in the utility model, described withstand pressure detection device comprises booster circuit, current measurement circuit, sample circuit, A/D converter and single-chip microcomputer, described booster circuit is connected to tested isolation barrier both sides, the input end of described current measurement circuit is connected in circuit-under-test, the output terminal of described current measurement circuit connects the analog input end of A/D converter by sample circuit, the numeral of described A/D converter exports single connection single-chip microcomputer, the output terminal of described single-chip microcomputer connects computing machine, the control output end of described computing machine connects booster circuit.
The beneficial effect that the utility model reaches: the utility model is by the detection to the quality of power supply in Medical Treatment Room, the safe operation situation of assessment Medical Devices, simultaneously for the detection of the electrical safety performance of the Medical Devices through Long-Time Service, guarantee the injury avoided in instrument use procedure human body.
The utility model is on-the-spot for Medical Treatment Room, have employed technology that is integrated, miniaturization, according to the different designs independently measurement module of detected object or target, and set up unified data-interface, be integrated with power quality analysis, leakage current test, insulating resistance measuring and resistance test, can detect the electric property of Medical Devices power utilization environment and Medical Devices self simultaneously, realize one-machine-multi-function, change as required, easy and simple to handle, centralized management controls.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of the utility model proving installation;
Fig. 2 is the structure principle chart of the utility model Power Quality Detection equipment;
Fig. 3 is the circuit theory diagrams of the utility model Power Quality Detection equipment voltage sample end;
Fig. 4 is the structure principle chart of the utility model leakage current test module;
Fig. 5 is the circuit theory diagrams of the test loop of the utility model leakage current test module.
Fig. 6 is the structure principle chart of earth resistance module of the present utility model;
Fig. 7 is the structure principle chart of the utility model withstand pressure detection device.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.
As shown in Figure 1, proving installation described in the utility model comprises the withstand pressure detection device for carrying out high voltage test to medical electronic equipment, for carrying out the leakage current test equipment of leakage current test to medical electronic equipment, for the Power Quality Detection equipment detected the quality of power supply in Medical Treatment Room, for measuring the insulating resistance measuring equipment of medical electronic equipment inner ground resistance, and for inputting the keyboard of detection signal, for detect potential safety hazard alarm alarm and for the computing machine to the instruction of above-mentioned each checkout equipment output detections, described withstand pressure detection device, leakage current test equipment, Power Quality Detection equipment, the signal output part of insulating resistance measuring equipment is all connected by the signal input part of interface adapter with described computing machine, the control output end of described computing machine drives connection withstand pressure detection device respectively, leakage current test equipment, Power Quality Detection equipment and insulating resistance measuring equipment, for the detection signal inputted according to Keysheet module, the work of output detections order-driven the corresponding function module, described computing machine also drives connection alarm.
Adopt proving installation of the present utility model when Medical Devices scene is detected, first the measuring ability needed is selected by button, and detection signal is sent to computing machine, after described computing machine obtains key command, according to the measuring ability that button is selected, corresponding checkout equipment is driven to carry out work, after completing detection, corresponding checkout equipment sends computing machine to detecting data, by computer drives display, detection data are shown by display, when testing result does not meet standard, computing machine sends alerting signal to alarm, drive alarm equipment alarm.
As shown in Figure 2, Power Quality Detection equipment of the present utility model forms primarily of voltage input sample, electric current input sample, sampling hold circuit, A/D change-over circuit and single-chip microcomputer.The input end of voltage input sample circuit and the input end of electric current input sampling circuit are all connected in electrical network, be respectively used to gather power network current and voltage, mains voltage signal is after rectifying and wave-filtering, access voltage input sample circuit, the output terminal of voltage input sample circuit connects the analog input end of A/D change-over circuit by sampling hold circuit, the digital output end of A/D change-over circuit connects single-chip microcomputer; Power network current signal is after IV conversion and rectifying and wave-filtering, and input current input sampling circuit, the signal of the output terminal output of electric current input sampling circuit, through AD conversion access single-chip microcomputer.
As shown in Figure 3, described voltage input sample circuit adopts resistor voltage divider circuit, and input end adjunction compensates
Electric capacity, to improve the ability of sampling transient signal, makes equipment can collect the spiking of 2500V high pressure, 1 μ s, again can the variation of height of detection of grid voltage.During detection of grid harmonic wave, voltage input sample end adopts electric resistance partial pressure and building-out capacitor circuit, can at a high speed, accurate sampled voltage signal, also improve the bandwidth of sampled signal, to be conducive to the spectrum analysis to high-frequency signal.Voltage signal after sampling keeps through sampling, A/D is stored in the nonvolatile memory of single-chip microcomputer after changing, single-chip microcomputer is connected with computing machine by RS232 or the RS485 interface with infrared ray light-coupled isolation, to prevent high pressure from scurrying into, improve the antijamming capability of system communication.In order to high speed, accurately sampled current signals, electric current input sample adopts the current clamp of wideband, and the frequency of current clamp is corresponding reaches 100kHz.Voltage after sampling, current signal, through conditioning, carry out analog to digital conversion by high-speed a/d converter respectively, and carry out digital signal processing, detection of grid harmonic wave.
As shown in Figure 4, leakage current test equipment of the present utility model is primarily of leakage current test circuit, sample circuit, amplifying circuit, A/D converter, comparer and single-chip microcomputer composition, the input end of described leakage current test circuit connects leakage current test lead, detect leakage current, the output terminal of described leakage current test circuit connects sample circuit, for exporting the leakage current detected signal to sample circuit, the output terminal of sample circuit connects A/D converter by amplifying circuit, for by sampling after leakage current signal after amplifying circuit process, export the analog input end of A/D converter to, the digital output end of A/D converter exports the digital leakage current signal after AD conversion, the digital output end of described A/D converter connects single-chip microcomputer, for the leakage current of test is stored in single-chip microcomputer, and send to computing machine analysis, display, simultaneously, leakage current signal after AD conversion is also delivered to an input end of comparer, leakage current signal is preset in another input end access of described comparer, the leakage current value of test and default leakage current value are compared, and output a control signal to control circuit, if the leakage current value detected exceeds preset value, then control alarm equipment alarm.
As shown in Figure 5, the test lead left side is test loop (MD circuit), SW1 selector switch, 1 is selected when frequency is less than or equal to 1kHz, frequency selects 2 more than 1kHz, on the right of test lead after amplifying, carry out sampling AD conversion and show, and compare with preset value and produce control signal and be sent to control circuit.
As shown in Figure 6, insulating resistance measuring equipment is by current feedback circuit, resistance measuring circuit, A/D converter, single-chip microcomputer, display and alarm composition, the input end of the signal output part contact resistance metering circuit of described current feedback circuit, the input end of resistance measuring circuit also connects the two ends of testing resistance, the output terminal of described resistance measuring circuit connects the analog input end of AD converter, the digital output end of described AD converter connects the input end of single-chip microcomputer, the output terminal of described single-chip microcomputer connects computing machine, the output terminal of described computing machine connects alarm and display.
Current feedback circuit produces measures electric current, and export test loop to, and the output terminal of test loop also connects the two ends of testing resistance, the voltage signal that current signal and the electric current flowed through in measured resistance produce processes by resistance measuring circuit, complete AC-DC conversion, carry out division arithmetic and obtain resistance signal, described resistance signal exports single-chip microcomputer to after AD conversion, be stored in flash storer, simultaneously, test result is sent to computing machine by single-chip microcomputer, and by display indicator current value and resistance value, if measured resistance is greater than alarming value, module drive alarm equipment alarm, if measuring current is excessive, measuring current is cut off while then reporting to the police, to ensure the safety of tested electrical equipment.
As shown in Figure 7, every leakage current of medical electrical equipment also will carry out high voltage test to it, to assess the performance of insulation barrier between each isolated part of this equipment after all meeting required limit value.Described withstand pressure detection device comprises booster circuit, current measurement circuit, sample circuit, A/D converter and single-chip microcomputer, described booster circuit is connected to tested isolation barrier both sides, the input end of described current measurement circuit is connected in circuit-under-test, the output terminal of described current measurement circuit connects the analog input end of A/D converter by sample circuit, the numeral of described A/D converter exports single connection single-chip microcomputer, the output terminal of described single-chip microcomputer connects computing machine, and the control output end of described computing machine connects booster circuit.
Its basic test method is exactly put on the parts on tested isolation barrier both sides using high voltage as test voltage, and the size of test voltage decides according to the voltage that under rated supply voltage, during normal work, isolation barrier is born.Apply in high-tension process, to need monitoring current, to prevent arc through.
The utility model is on-the-spot for Medical Treatment Room, have employed technology that is integrated, miniaturization, according to the different designs independently measurement module of detected object or target, and set up unified data-interface, be integrated with power quality analysis, leakage current test, insulating resistance measuring and resistance test, can detect the electric property of Medical Devices power utilization environment and Medical Devices self simultaneously, realize one-machine-multi-function, change as required, easy and simple to handle, centralized management controls.
Claims (7)
1. a medical electronic equipment security test device, it is characterized in that: described proving installation comprises the withstand pressure detection device for carrying out high voltage test to medical electronic equipment, for carrying out the leakage current test equipment of leakage current test to medical electronic equipment, for the Power Quality Detection equipment detected the quality of power supply in Medical Treatment Room, for measuring the insulating resistance measuring equipment of medical electronic equipment inner ground resistance, and for inputting the keyboard of detection signal, for detect potential safety hazard alarm alarm and for the computing machine to the instruction of above-mentioned each checkout equipment output detections, described withstand pressure detection device, leakage current test equipment, Power Quality Detection equipment, the signal output part of insulating resistance measuring equipment is all connected by the signal input part of interface adapter with described computing machine, the control output end of described computing machine drives connection withstand pressure detection device respectively, leakage current test equipment, Power Quality Detection equipment and insulating resistance measuring equipment, for the detection signal inputted according to Keysheet module, the work of output detections order-driven the corresponding function module, described computing machine also drives connection alarm.
2. medical electronic equipment security test device according to claim 1, is characterized in that described proving installation comprises display, and described display is connected to the drive singal output terminal of computing machine.
3. medical electronic equipment security test device according to claim 1, it is characterized in that described Power Quality Detection equipment comprises voltage input sample circuit, electric current input sampling circuit, sampling hold circuit, A/D change-over circuit and single-chip microcomputer, mains voltage signal to be measured is after rectifying and wave-filtering process, access the input end of described voltage input sample circuit, the signal output part of described voltage input sample circuit connects the analog input end of A/D change-over circuit by sampling hold circuit, the digital output end of A/D change-over circuit connects the data-in port of described single-chip microcomputer, the data-out port of described single-chip microcomputer is connected with the signal input part of described computing machine by RS232 or the RS485 interface with infrared ray light-coupled isolation.
4. medical electronic equipment security test device according to claim 3, it is characterized in that described voltage input sample circuit adopts resistor voltage divider circuit, and the input end of described voltage input sample circuit connects building-out capacitor.
5. medical electronic equipment security test device according to claim 1, it is characterized in that described leakage current test equipment is primarily of leakage current test circuit, sample circuit, amplifying circuit, A/D converter, comparer, control circuit and single-chip microcomputer composition, the input end of described leakage current test circuit connects the leakage current test lead of electrical equipment to be tested, the output terminal of described leakage current test circuit connects sample circuit, the output terminal of sample circuit connects the analog input end of A/D converter by amplifying circuit, the digital output end of described A/D converter connects single-chip microcomputer, the computing machine described in signal output part connection of described single-chip microcomputer, an input end of described comparer connects the digital output end of A/D converter, leakage current signal is preset in another input end access of described comparer, the signal output part connection control circuit of described comparer, the signal output part of described control circuit connects computing machine.
6. medical electronic equipment security test device according to claim 1, it is characterized in that described insulating resistance measuring equipment is by current feedback circuit, resistance measuring circuit, A/D converter and single-chip microcomputer composition, the signal input part of described current feedback circuit connects computing machine, the input end of the signal output part contact resistance metering circuit of described current feedback circuit, the input end of described resistance measuring circuit also connects the two ends of testing resistance, the output terminal of described resistance measuring circuit connects single-chip microcomputer by A/D converter, the output terminal of described single-chip microcomputer connects computing machine, the control output end of described computing machine connects current feedback circuit.
7. medical electronic equipment security test device according to claim 1, it is characterized in that described withstand pressure detection device comprises booster circuit, current measurement circuit, sample circuit, A/D converter and single-chip microcomputer, described booster circuit is connected to tested isolation barrier both sides, the input end of described current measurement circuit is connected in circuit-under-test, the output terminal of described current measurement circuit connects the analog input end of A/D converter by sample circuit, the numeral of described A/D converter exports single connection single-chip microcomputer, the output terminal of described single-chip microcomputer connects computing machine, the control output end of described computing machine connects booster circuit.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107087008A (en) * | 2017-05-26 | 2017-08-22 | 北京立思辰新技术有限公司 | The method for safety monitoring and system of a kind of medical network |
| CN109374952A (en) * | 2018-12-03 | 2019-02-22 | 王尧君 | A kind of all automatic measurement system and measurement method of electric knife leakage current |
-
2015
- 2015-06-29 CN CN201520456596.6U patent/CN204989330U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107087008A (en) * | 2017-05-26 | 2017-08-22 | 北京立思辰新技术有限公司 | The method for safety monitoring and system of a kind of medical network |
| CN109374952A (en) * | 2018-12-03 | 2019-02-22 | 王尧君 | A kind of all automatic measurement system and measurement method of electric knife leakage current |
| CN109374952B (en) * | 2018-12-03 | 2024-02-02 | 四川中测仪器科技有限公司 | Full-automatic measurement system and measurement method for leakage current of high-frequency electrotome |
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