CN106324376A - Integrated medical onsite safety testing system and method - Google Patents
Integrated medical onsite safety testing system and method Download PDFInfo
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- CN106324376A CN106324376A CN201510368040.6A CN201510368040A CN106324376A CN 106324376 A CN106324376 A CN 106324376A CN 201510368040 A CN201510368040 A CN 201510368040A CN 106324376 A CN106324376 A CN 106324376A
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Abstract
The invention relates to an integrated medical onsite safety testing system and method. The testing system comprises an electric strength test module, a leakage current test module, a power quality analysis module, a ground resistance detection module, a keyboard module, an alarm and a control computer. The signal output end of each functional module is connected to the signal input end of the control computer through an interface adapter, and each functional module is used for sending detection data to the control computer. The control output end of the control computer drives and connects each functional module, and the control computer is used for outputting a detection instruction to drive working of a corresponding functional module according to a detection signal input by the keyboard module. The control computer also drives and connects the alarm. The invention adopts modularization and miniaturization technologies, can detect power consumption environments and electrical performances of medical equipment, and achieves multiple functions by one machine. The operation is simple and convenient, and centralized management and control is facilitated.
Description
Technical field
The present invention relates to a kind of integrated medical site safety test system and method.
Background technology
The feature of medical electrical equipment is that instrument is closely related with human body.Most medical electronic apparatuss are for acquisitor
Body information or give human body certain effect, instrument is either closely coupled to human body together with work.As gastroscopy
And cardia catheterization, within a certain period of time instrument to be put into human body, also have as bury type cardiac pacemaker that
Sample, need to be placed on for a long time in human body.The target of medical electrical equipment is patient, and patient is likely to be at
The most fragile state；Or patient may realize that danger, or danger can not be judged, even if or feeling dangerous
Can not break away from；Or the resistance that stimulates to external world of the patient's illnesses having itself reduces, have due to diagnosis and
Treatment, external stimulation is easy to cause worse impact.Such as, heart patient will draw with the least electric current
Play ventricular fibrillation, in the case of inserting cardiac catheter, even Weak current also easily causes ventricular fibrillation because of electric shock.
When there is circulatory disturbance, when the heat added can not be scattered rapidly, even if at a lower temperature, the most easily cause Low Temperature Thermal
Wound.
When being combined with several medical electrical equipments are associated in a patient using simultaneously, it is not only just each
The safety problem that instrument itself is existing, also has the new problem derived from because being applied in combination.Instrument combination uses
Time, it is easiest to cause shock hazard.All reach the standard of regulation when instrument is used alone, but once combined
Being possible to exceed feasible value scope, also electric current flows into from body surface, by body, then flows out from body surface and produces
Strong electrical shock, it is attended by the danger causing ventricular fibrillation and second accident.Therapy apparatus and precision when especially big energy
Medical electric testing instrument and the used time, fine measuring instrument exported by therapy apparatus affected can not measure or
Make a mistake output and malfunction, causes instrument damage, indirectly jeopardizes the safety of patient.Relying on precision doctor
In the case of the measurement data of electrical installation carries out diagnosis and treatment, the output information of measuring instrument is inaccurate and distortion, is
Jeopardize safe major issue.
The quality of power supply is the key factor affecting medical electronic equipment safe operation, and the quality of power supply there is presently no one
Individual unified definition, International Electrotechnical Commission's IEC standard is defined such that to the quality of power supply quality of power supply is
Confession under directions electric installation does not interrupts and disturbs user to use the physical characteristic of electric power.So-called electric energy
Being the concentrated reflection in electrical network of the summation of various single disturbance and energy imbalance on quality entity, it is emphasized
Be influencing each other between electrical network and electrical equipment.IEEE (IEEE) definition electric energy matter
Amount is: the qualified electric power referring to be supplied to sensitive equipment of the quality of power supply and the earthed system of device enable to this
Equipment is working properly.
The operation alternating current to be used of armarium, the power supply system of national grid continues to hospital's conveying big
The electric energy of amount.In preferable power supply system, electric energy is with constant frequency (50Hz or 60Hz) and amplitude
Three-phase equilibrium sinusoidal voltage power to hospital, but the power supply system in actual motion can be contaminated,
Even being heavily polluted, the order of severity of China's electric pollution is never second to environmental pollution.Society's process of industrialization
Accelerate rapidly the development of main facilities (metallurgical industry, chemical industry and the electric railway etc.) and exacerbate electric pollution
Propagation；Nonlinear-load in power supply system, impact load make power network non-linear (harmonic wave),
Asymmetry (negative phase-sequence) and undulatory property are on the rise, and are transported to the amplitude of the three-phase voltage of hospital, frequency and phase place
Difference no longer keeps constant, and waveform is no longer single sine wave.The quality of power supply that electric pollution causes declines, and makes doctor
The safe operation index for the treatment of equipment substantially reduces, and the fault rate of armarium substantially increases, and has had a strong impact on clinic
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 same
It is in several section office of certain electricity consumption branch road.When power supply system is transported to the electric power being affected by polluting of hospital
Time, the impact that full institutes is had armarium to produce by the decline of the quality of power supply is general character, involves a wide range of knowledge, and occurs
The armarium kind of fault and quantity are the most, and this is the first situation.The second situation be construct in hospital,
The construction machinery that when transformation, finishing, many power consumptions are big the most disorderly connects power supply, causes local electricity consumption branch road electric energy
Declining, being connected to the armarium on this branch road will be severely impacted: when large-tonnage elevator is opened,
The work causing an automatic clinical chemistry analyzer is paralysed；Powerful hoist engine makes the blood gas analyzer of clinical laboratory
Cannot work etc. several equipment；One high-grade color ultrasound does cardiac work up to patient, and same floor fills
Repairing the cutting machine of construction, electric welding machine etc. all to go into battle, patient does not checks out, and color ultrasound machine just have failed,
In machine, one piece of signal-processing board being worth more than 10 ten thousand yuan is broken.
The reality of electric pollution is the most generally recognized in China, and the seriousness of power quality problem does not more have
Coming into one's own, once power quality is poor, easily causes armarium in hospital that event occurs again and again
Barrier so that it is that equipment is fixed a breakdown that engineers is hurried back and forth heap of times in each section office, substantial amounts of human and material resources and
Fund all consumes in the process afterwards of this fault.Serious loss of data, the hardware damage of causing, especially
The safe operation index making the armarium sensitive to the quality of power supply significantly reduces, and the fault rate of armarium is bright
Aobvious increase, has had a strong impact on clinical diagnosis and treatment work.
Along with introduction and the use of various advanced armarium, various electronic circuits and Power Electronic Technique are in the modern times
The application of hospital, biomedical engineering effect played in modern hospital is more and more important.Armarium
Update and make rapid progress, thus result in the electromagnetic environment of hospital and there occurs greatly change, if lack suitable
The precautionary measures, the threat that the normal operation of new equipment system may be disturbed by potential harmonic wave, and then reduction newly set
The standby benefit brought.
Owing to the signal of armarium is the most weak, if subjected to interference, will be in testing result (such as waveform, figure
Shape, image) upper a kind of distortion (harmonic wave) being similar to some pathological changes of superposition causes mistaken diagnosis, the most also can cause micro-electricity
Hit, time serious, may also result in the life danger of those who are investigated.If with the medical instrument of computer system
Equipment, when the spike interference magnitude in common mode disturbances reaches 2 50V, during time last microseconds, can cause meter
Calculation machine logical error, information dropout etc..High-intensity magnetic field can make the display anamorphose of image reproducer, x-ray image intensifier tube lose
Very；Accelerator ray deflection；Computer disk, magnetic card record data corruption；Respirator work is malfunctioning；Heart
Pacemaker operational failure etc..
Owing to the electricity consumption pipe network of Partial Hospitals is aging and newly-built medical building is to newly-increased medical electrical equipment and system
Corresponding consideration is not made for the requirement of electromagnetic environment, causes the new medical electrical equipment must be to its electromagnetism
Compatibility is made and is considered comprehensively and carry out reliability design.The Medical treatment device that on April 1st, 2007 formally comes into effect
Mandatory industry standard YO505 1 " medical electrical equipment the 1st one 2 part: safety general is wanted of tool
Seek a standard arranged side by side: electromagnetic compatibility one requires and tests " in medical electrical equipment proposed 3 emission experiment and
7 immunity tests, and product resists thousand suppressing method disturbed mainly to have three kinds, i.e. ground connection, shield and filter.This
Three kinds of methods not only have its respective unique effect in the design of circuit and system, and are again interrelated
: good ground connection can reduce the equipment requirement to shielding and filter, and contrary, good shielding can also
The requirement making filtering is lower, and filtering itself can reduce the Conduction Interference of equipment simultaneously and improve the anti-interference of equipment
Degree.
In terms of ensureing the application technology of medical electrical equipment safe operation, the most commonly used is for equipment originally
The ground connection of body, shield and filter.Such as use high-frequency work mode medical electrical equipment, as high frequency electric knife,
Ultra-short wave therapy apparatus, electric field treatment instrument etc., use multipoint earthing mode effectively to drop in its high-frequency circuit part
Its electromagnetic interference low, can not only realize the personal safety protection of personnel, may also operate as releasing on cabinet simultaneously
Electrostatic charge and the effect of raising equipment job stability.Magnetic interference is insensitive for most of equipment
, but for as medical electrics such as nuclear magnetic resonance imaging system, ultramicroscope, biological brain electric wave scanneies
System then may produce serious influence.To power frequency magnetic field and the screen in very low frequency magnetic field in medical electrical equipment and system
Cover the design mainly taking that Sensitive Apparatus ferrimagnet is wrapped.And utilize metal material (such as metal
Shielding case body) reflection loss and attenuation by absorption mechanism can play prevention the electromagnetic field propagation in space.And it is electric
The employing of source line filter can suppress the High-frequency Interference by phase line, neutral conductor importing ground wire simultaneously, and (i.e. common mode is done
Disturb) and the High-frequency Interference (i.e. differential mode interference) of people's neutral conductor is led by phase line.
China is very strict to medical apparatus and instruments management and control, establishes a series of mandatory country and industry standard, to doctor
Electrical installation is from being designed into production procedure to quality inspection to using code to have higher requirement.But standard master
Medical electrical equipment to be directed to itself and its initial working environment, and may during equipment is used
The external action being likely to result in after the external environment change occurred and ageing equipment is seldom taken into account.Meanwhile, electro-medical
After gas equipment is installed and used, its annual calibration operation typically can complete at the scene, for some large-scale equipment more
It is such.And the assay device of the medical electrical equipment related at present is substantially Laboratory Instruments, portability is not
Foot, makes the calibration operation difficulty of medical electrical equipment strengthen, is even left in the basket, the most to a certain extent to medical electric
The safe operation of gas equipment brings hidden danger.
Summary of the invention
It is an object of the invention to provide a kind of integrated medical site safety test system, the test system of the present invention
System is integrated with power quality analysis, leakage current test, insulating resistance measuring and resistance test, uses miniaturization, mould
Massing designs, and can detect the electric property of armarium power utilization environment and armarium self simultaneously, operation
Simplicity, centralized management controls.The mode of single detection is used in order to solve the existing test device on-the-spot for medical treatment,
Complex operation, it is impossible to unified centralized management, portability is poor, makes the calibration operation difficulty of medical electrical equipment strengthen,
Even it is left in the basket, the problem that the safe operation to medical electronic equipment brings hidden danger the most to a certain extent.
For achieving the above object, the solution of the present invention is: a kind of integrated medical site safety test system,
Described test system includes the voltage-withstand test module for medical electronic equipment carries out high voltage test, for right
Medical electronic equipment carries out the leakage current test module of leakage current test, for examining the quality of power supply in Medical Treatment Room
The power quality analysis module surveyed, the insulating resistance measuring module being used for measuring medical electronic equipment inner ground resistance,
And for inputting the Keysheet module of detection signal, for there is the alarm of potential safety hazard alarm and for right
The detection signal of above-mentioned each module is analyzed the control computer processed, and described voltage-withstand test module, leakage current are surveyed
Die trial block, power quality analysis module, insulating resistance measuring module signal output part all by interface adapter with
The signal input part of described control computer connects, for detection data are sent to controlling computer, and described control
The control output end of computer drive connection voltage-withstand test module respectively, leakage current test module, power quality analysis
Module and insulating resistance measuring module, for the detection signal according to Keysheet module input, output detections order-driven
The work of the corresponding function module, described control computer also drive connection alarm.
According to integrated medical site safety test system of the present invention, including display, described is aobvious
Show that device is connected to control the driving signal output part of computer.
According to integrated medical site safety test system of the present invention, described power quality analysis mould
Block includes voltage input sample circuit, electric current input sampling circuit, sampling hold circuit, A/D change-over circuit and list
Sheet machine, mains voltage signal to be measured, after rectifying and wave-filtering processes, accesses the input of described voltage input sample circuit
End, the signal output part of described voltage input sample circuit connects A/D change-over circuit by sampling hold circuit
Analog input end, the digital output end of A/D change-over circuit connects the data-in port of described single-chip microcomputer, described
The data-out port of single-chip microcomputer is by having RS232 or the RS485 interface of infrared ray light-coupled isolation and described control
The signal input part of computer connects.
According to integrated medical site safety test system of the present invention, described voltage input sample electricity
Road uses resistor voltage divider circuit, and the input of described voltage input sample circuit connects compensation electric capacity, in order to improve
The ability of sampling transient signal.
According to integrated medical site safety test system of the present invention, described leakage current test module
Mainly by leakage current test circuit, sample circuit, amplifying circuit, A/D converter, comparator, control circuit and
Single-chip microcomputer forms, and the input of described leakage current test circuit connects the leakage current test lead of electrical equipment to be tested,
Detecting the leakage current signal of electrical equipment to be measured, the outfan of described test circuit connects sample circuit, sample circuit
Outfan by amplifying circuit connect A/D converter analog input end, the digital output end of A/D converter is defeated
Going out the digital leakage current signal after AD conversion, the digital output end of described A/D converter connects single-chip microcomputer,
The control computer described in signal output part connection of described single-chip microcomputer, an input of described comparator connects
The digital output end of A/D converter, another input of described comparator accesses presets leakage current signal, described
The signal output part of comparator connects control circuit, for the leakage current value of test being compared with default leakage current value
Relatively, and outputting a control signal to control circuit according to comparative result, the signal output part of described control circuit connects control
Computer processed.
According to integrated medical site safety test system of the present invention, described insulating resistance measuring mould
Block is made up of current feedback circuit, resistance measuring circuit, A/D converter and single-chip microcomputer, and described current feedback circuit is used
In producing test electric current, the signal input part of described current feedback circuit connects control computer, described current feedback circuit
Signal output part connect resistance measuring circuit input, the input of described resistance measuring circuit is also connected with to be measured
The two ends of resistance, the outfan of described test circuit connects single-chip microcomputer by A/D converter, will test data storage
In the memorizer of single-chip microcomputer, the outfan of described single-chip microcomputer connects control computer, the control of described control computer
Outfan processed connects current feedback circuit；
The voltage signal that test current signals and the electric current flowed through in measured resistance produce is carried out by described test circuit
AC-DC conversion, obtains the resistance of measured resistance, if measuring resistance value to be more than alarming value, then controls computer and controls
Alarm equipment alarm, if test electric current excessive, then module report to the police while cut off test circuit, with ensure tested electrically
The safety of equipment.
According to integrated medical site safety test system of the present invention, described voltage-withstand test module is used
With the performance of insulation barrier between assessment each isolated part of electrical equipment, described voltage-withstand test module carries out high electricity
Pressure test is to put on high voltage to be test for isolation barrier both sides, and the size of test voltage is according to rated power supply electricity
When pressure normally works, the voltage that isolation barrier is born determines；
Described voltage-withstand test module include booster circuit, current measurement circuit, sample circuit, A/D converter and
Single-chip microcomputer, described booster circuit is connected to be test for isolation barrier both sides, the input of described current measurement circuit
End is connected in circuit-under-test, and the outfan of described current measurement circuit connects A/D converter by sample circuit
Analog input end, the numeral output single connection single-chip microcomputer of described A/D converter, the outfan of described single-chip microcomputer connects
Controlling computer, the control output end of described control computer connects booster circuit.
The present invention also aims to provide a kind of integrated medical site safety method of testing, the survey of the present invention
Power quality analysis, leakage current test, insulating resistance measuring and resistance test are concentrated on a test system by method for testing
In system, use miniaturization, modularized design, can be simultaneously to armarium power utilization environment and the electricity of armarium self
Gas performance detects, easy and simple to handle, and centralized management controls.Adopt in order to solve the existing test on-the-spot for medical treatment
With the mode of single detection, complex operation, it is impossible to unified centralized management, portability is poor, makes medical electrical equipment
Calibration operation difficulty strengthens, and is even left in the basket, and the safe operation to medical electronic equipment brings the most to a certain extent
The problem of hidden danger.
For achieving the above object, the scheme that the present invention uses is: a kind of integrated medical site safety test side
Method, step is as follows:
(1) each functional module is set in controlling computer, i.e. voltage-withstand test module, leakage current test module, electricity
Can quality analysis module and the detection parameter preset value of insulating resistance measuring module；
(2) selected the detection function needed by Keysheet module, input detection signal is to controlling computer, by controlling
Computer sends detection instruction to corresponding functional module, the functional module work of driving correspondence according to detection signal；
(3) each described functional module is after completing detection, and detection data are stored in depositing of each functional module self
In reservoir, when needed, called by controlling computer, simultaneously described in functional module by real-time detector data
Send to controlling computer；
(4) preset value of detection data with the detection data of its storage inside is compared by the computer that controls described in
Institute relatively, if the size of detection data has exceeded described preset value, then judges that the medical electronic equipment of detection exists
Potential safety hazard, and send alarm signal.
According to method of testing of the present invention, detection data are shown, just by described method of testing by display
Check in staff.
According to method of testing of the present invention, described method of testing by each functional module by interface adapter with
Control computer connect, each functional module is all independently arranged, when carrying out security test, according to detection need with
Shi Genghuan functional module.
The beneficial effect that the present invention reaches: the present invention is by the detection of the quality of power supply in Medical Treatment Room, assessment medical treatment
The safe operation situation of equipment, is simultaneous for the detection of the electrical safety performance of armarium through life-time service,
Guarantee that instrument avoids the injury to human body during using.
The present invention is directed to Medical Treatment Room on-the-spot, be integrated with power quality analysis, leakage current test, insulating resistance measuring and
Resistance test, can detect the electric property of armarium power utilization environment and armarium self simultaneously, operation
Simplicity, centralized management controls.
According to detection object or the measurement module of the different designs independence of target, and set up unified data-interface, press
Needing to change, it is achieved one-machine-multi-function, have employed the technology of modularity, miniaturization, described detection equipment possesses portable
The feature of formula, the most interpersonal interactive interface or hardware interface are the most simple and practical.
Accompanying drawing explanation
Fig. 1 is the structure principle chart that the present invention tests system；
Fig. 2 is the structure principle chart of power quality analysis module of the present invention；
Fig. 3 is the circuit theory diagrams of power quality analysis module voltage sampling end of the present invention；
Fig. 4 is the structure principle chart of leakage current test module of the present invention；
Fig. 5 is the circuit theory diagrams of the test loop of leakage current test module of the present invention.
Fig. 6 is the structure principle chart of the earth resistance module of the present invention；
Fig. 7 is the structure principle chart of voltage-withstand test module of the present invention.
Detailed description of the invention
The present invention is further detailed explanation with specific embodiment below in conjunction with the accompanying drawings.
As it is shown in figure 1, test system of the present invention includes carrying out high electricity for the electrical equipment on-the-spot to medical treatment
The voltage-withstand test module of pressure test, for medical electronic equipment carried out leakage current test leakage current test module,
For the power quality analysis module that the quality of power supply in Medical Treatment Room is detected, in measuring medical electronic equipment
The insulating resistance measuring module of portion's earth resistance, and for inputting the Keysheet module of detection signal, for existing
Alarm and the control processed for above-mentioned each module detects signal be analyzed of potential safety hazard alarm calculate
Machine, described voltage-withstand test module, leakage current test module, power quality analysis module, insulating resistance measuring module
Signal output part be all connected by the signal input part of interface adapter with described control computer, for will detection
Data send to controlling computer, the control output end of described control computer drive connection voltage-withstand test module respectively,
Leakage current test module, power quality analysis module and insulating resistance measuring module, for inputting according to Keysheet module
Detection signal, the work of output detections order-driven the corresponding function module, the described control computer also company of driving
Device taking alarm.
Control computer to include primary processor, drive module and controller, use the test system of the present invention in medical treatment
When device context detects, first pass through the detection function that key-press module selects to need, and detection signal is sent
Primary processor, after described primary processor obtains key command, the detection function selected according to key-press module, driven
Dynamic model block sends and drives signal, by driving the work of module drive controller, controls corresponding detection module and realizes correspondence
Detection function.Meanwhile, detection module sends primary processor to detection data, primary processor control to drive mould
Block drives display, detection data is shown by display, when testing result does not meets standard, and main place
Reason device sends alarm signal and reports to the police to alarm module, driving alarm module.
As in figure 2 it is shown, the power quality analysis module of the present invention is mainly adopted by voltage input sample, electric current input
Sample, sampling hold circuit, A/D change-over circuit and single-chip microcomputer composition.The input of voltage input sample circuit and electricity
The input of stream input sampling circuit is both connected in electrical network, is respectively used to gather power network current and voltage, electrical network electricity
Pressure signal, after rectifying and wave-filtering, accesses voltage input sample circuit, and the outfan of voltage input sample circuit passes through
Sampling hold circuit connects the analog input end of A/D change-over circuit, and the digital output end of A/D change-over circuit connects single
Sheet machine；Power network current signal is after IV conversion and rectifying and wave-filtering, and input current input sampling circuit, electric current is defeated
Enter the signal of the outfan output of sample circuit, access single-chip microcomputer through AD conversion.
As it is shown on figure 3, described voltage input sample circuit uses resistor voltage divider circuit, input adjunction compensates
Electric capacity, to improve the ability of sampling transient signal, makes equipment can collect 2500V high pressure, the spiking of 1 μ s,
The variation of the height of line voltage can be detected again.During detection mains by harmonics, voltage input sample end uses electric resistance partial pressure
And compensation condenser network, can at a high speed, accurate sampled voltage signal, also improve the bandwidth of sampled signal, to have
It is beneficial to the spectrum analysis to high-frequency signal.The sampled holding of voltage signal, A/D after sampling are stored in list after changing
In the nonvolatile storage of sheet machine, single-chip microcomputer by have RS232 or the RS485 interface of infrared ray light-coupled isolation with
Control computer to connect, to prevent high pressure from scurrying into, improve the capacity of resisting disturbance of system communication.In order at a high speed, accurately
Sampled current signals, electric current input sample uses the current clamp of wideband, and the frequency of current clamp reaches 100kHz accordingly.
Voltage, current signal after sampling pass through conditioning, are carried out analog digital conversion by high-speed a/d converter respectively,
Go forward side by side row number signal processing.Frequency analysis (spectrum analysis) is the core of Digital Signal Processing, and the present invention utilizes
Have anti aliasing purposes error effects fast Flourier spectrum transformation (Fast Anti-Aliasing Fourier Transform,
FAFT) method, to realize the most quickly but also to analyze exactly the higher hamonic wave of up to more than 100kHz, FAFT divides
Analyse 3998 subharmonic to have only to process (16+1) individual data.
As shown in Figure 4, the leakage current test module of the present invention is mainly tested circuit, sample circuit by leakage current, is put
Big circuit, A/D converter, comparator and single-chip microcomputer composition, the input of described leakage current test circuit connects
Leakage current test lead, detects leakage current, and the outfan of described test circuit connects sample circuit, for detecting
The output of leakage current signal to sample circuit, the outfan of sample circuit connects A/D converter by amplifying circuit,
Leakage current signal after sampling, after amplifying circuit processes, exports the analog input end to A/D converter,
The digital output end output of A/D converter digital leakage current signal after AD conversion, described A/D converter
Digital output end connect single-chip microcomputer, for being stored in single-chip microcomputer by the leakage current of test, and be sent to control meter
Calculation machine is analyzed, shows, meanwhile, the leakage current signal after AD conversion is also delivered to of comparator
Input, another input of described comparator accesses presets leakage current signal, by the leakage current value of test with pre-
If leakage current value compares, and output a control signal to control circuit, if be detected that leakage current value beyond pre-
If value, then control alarm equipment alarm.
As it is shown in figure 5, the test lead left side is test loop (MD circuit), SW1 selects switch, when frequency is little
In or equal to 1kHz select 1, frequency more than 1kHz select 2, on the right of test lead through amplification after, adopt
Sample AD conversion shows, and compare with preset value generation control signal be sent to control circuit.
As shown in Figure 6, insulating resistance measuring module is by current feedback circuit, test circuit, A/D converter, list
Sheet machine, display and alarm composition, the input of the signal output part connecting test circuit of described current feedback circuit,
The input of test circuit is also connected with the two ends of testing resistance, and the outfan of described test circuit connects a/d converter
Analog input end, the digital output end of described a/d converter connects the input of single-chip microcomputer, described single-chip microcomputer
Outfan connects control computer, and the outfan of described control computer connects alarm and display.
Current feedback circuit produces measures electric current, and exports to test loop, and the outfan of test loop is also connected with treating
The two ends of measuring resistance, the voltage signal that current signal and the electric current flowed through in measured resistance produce is carried out by test circuit
Processing, complete AC-DC conversion, carry out division arithmetic and obtain resistance signal, described resistance signal turns through AD
Exporting after changing to single-chip microcomputer, be stored in flas memorizer, meanwhile, test result is sent to main process by single-chip microcomputer
Device, and by display indicator current value and resistance value, if measured resistance is more than alarming value, module drive alarm
Report to the police, if test electric current is excessive, then cut off test electric current while reporting to the police, to ensure the safety of tested electrical equipment.
Insulating resistance measuring module is used to measure the earth resistance of inside electric appliance, and what it was reflected is electrically to set
Contact resistance between standby exposed conductive part everywhere and total ground terminal of electrical equipment.In order to eliminate contact
The resistance impact on test, module uses four-terminal measurement method, i.e. between exposed conductive part and total ground terminal
Plus electric current, measure the voltage at these two ends the most again, calculate its resistance value.Standard UL2602-1 specifies, power supply
Between each accessible part that may be charged when protective grounding pin and contingency generation basic insulation fault on plug
Impedance, all should be less than 0.1 Ω, therefore needs to use Kelvin probe in test process, leads effectively to remove
The resistance of line, and avoid high current density to be gathered in the voltage measurement error that Current injection points is introduced.
As it is shown in fig. 7, after every leakage current of medical electrical equipment all meets required limit value, also will be to it
Carry out high voltage test, to assess the performance of insulation barrier between each isolated part of this equipment.Described pressure survey
Die trial block includes booster circuit, current measurement circuit, sample circuit, A/D converter and single-chip microcomputer, described liter
Volt circuit is connected to be test for isolation barrier both sides, and the input of described current measurement circuit is connected to circuit-under-test
In, the outfan of described current measurement circuit connects the analog input end of A/D converter by sample circuit, described
The numeral output single connection single-chip microcomputer of A/D converter, the outfan of described single-chip microcomputer connects control computer, described
The control output end controlling computer connects booster circuit.
Its basic test method is exactly the portion being put on as test voltage by high voltage and being test for isolation barrier both sides
On part, the size of test voltage is come certainly according to the voltage that under rated supply voltage, during normal work, isolation barrier is born
Fixed.Apply high-tension during, need monitoring current, to prevent arc through.
The present invention is directed to Medical Treatment Room on-the-spot, be integrated with power quality analysis, leakage current test, insulating resistance measuring and
Resistance test, can detect the electric property of armarium power utilization environment and armarium self simultaneously, operation
Simplicity, centralized management controls.
Claims (10)
1. an integrated medical site safety test system, it is characterised in that: described test system includes
For medical electronic equipment being carried out the voltage-withstand test module of high voltage test, for medical electronic equipment is leaked
The leakage current of testing current tests module, for the power quality analysis mould detecting the quality of power supply in Medical Treatment Room
Block, for measuring the insulating resistance measuring module of medical electronic equipment inner ground resistance, and be used for inputting detection
The Keysheet module of signal, for there is the alarm of potential safety hazard alarm and for the detection to above-mentioned each module
Signal is analyzed the control computer processed, described voltage-withstand test module, leakage current test module, the quality of power supply
Analyze module, insulating resistance measuring module signal output part all by interface adapter and described control computer
Signal input part connects, for detection data are sent to controlling computer, and the control output of described control computer
End drive connection voltage-withstand test module respectively, leakage current test module, power quality analysis module and earth resistance inspection
Survey module, for the detection signal according to Keysheet module input, the work of output detections order-driven the corresponding function module
Make, described control computer also drive connection alarm.
Integrated medical site safety test system the most according to claim 1, it is characterised in that described
Test system include display, described display be connected to control computer driving signal output part.
Integrated medical site safety test system the most according to claim 1, it is characterised in that described
Power quality analysis module include 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, after rectifying and wave-filtering processes, accesses described voltage defeated
Entering the input of sample circuit, the signal output part of described voltage input sample circuit is by sampling hold circuit even
Connecing the analog input end of A/D change-over circuit, the digital output end of A/D change-over circuit connects the data of described single-chip microcomputer
Input port, the data-out port of described single-chip microcomputer is by having RS232 or RS485 of infrared ray light-coupled isolation
Interface is connected with the signal input part of described control computer.
Integrated medical site safety test system the most according to claim 3, it is characterised in that described
Voltage input sample circuit use resistor voltage divider circuit, and described voltage input sample circuit input connect mend
Repay electric capacity, in order to improve the ability of sampling transient signal.
Integrated medical site safety test system the most according to claim 1, it is characterised in that described
Leakage current test module mainly tested circuit, sample circuit, amplifying circuit, A/D converter, ratio by leakage current
Relatively device, control circuit and single-chip microcomputer composition, the input connection of described leakage current test circuit is to be tested electrically to be set
Standby leakage current test lead, detects the leakage current signal of electrical equipment to be measured, and the outfan of described test circuit connects
Sample circuit, the outfan of sample circuit connects the analog input end of A/D converter by amplifying circuit, and A/D turns
The digital output end output of parallel operation digital leakage current signal after AD conversion, the numeral of described A/D converter
Outfan connects single-chip microcomputer, the control computer described in signal output part connection of described single-chip microcomputer, described comparator
Input connect the digital output end of A/D converter, another input of described comparator accesses to be preset
Leakage current signal, the signal output part of described comparator connects control circuit, and the leakage current value being used for testing is with pre-
If leakage current value compares, and output a control signal to control circuit according to comparative result, described control circuit
Signal output part connects control computer.
Integrated medical site safety test system the most according to claim 1, it is characterised in that described
Insulating resistance measuring module be made up of current feedback circuit, resistance measuring circuit, A/D converter and single-chip microcomputer, institute
The current feedback circuit stated is for producing test electric current, and the signal input part of described current feedback circuit connects control computer,
The signal output part of described current feedback circuit connects the input of resistance measuring circuit, described resistance measuring circuit defeated
Entering end and be also connected with the two ends of testing resistance, the outfan of described test circuit connects single-chip microcomputer by A/D converter,
Test data being stored in the memorizer of single-chip microcomputer, the outfan of described single-chip microcomputer connects control computer, described
The control output end controlling computer connects current feedback circuit；
The voltage signal that test current signals and the electric current flowed through in measured resistance produce is carried out by described test circuit
AC-DC conversion, obtains the resistance of measured resistance, if measuring resistance value to be more than alarming value, then controls computer and controls
Alarm equipment alarm, if test electric current excessive, then module report to the police while cut off test circuit, with ensure tested electrically
The safety of equipment.
Integrated medical site safety test system the most according to claim 1, it is characterised in that described
Voltage-withstand test module in order to assess the performance of insulation barrier between each isolated part of electrical equipment, described is pressure
To carry out high voltage test be to put on high voltage to be test for isolation barrier both sides to test module, test voltage big
Little according to when normally working under rated supply voltage, the voltage that isolation barrier is born determines；
Described voltage-withstand test module include booster circuit, current measurement circuit, sample circuit, A/D converter and
Single-chip microcomputer, described booster circuit is connected to be test for isolation barrier both sides, the input of described current measurement circuit
End is connected in circuit-under-test, and the outfan of described current measurement circuit connects A/D converter by sample circuit
Analog input end, the numeral output single connection single-chip microcomputer of described A/D converter, the outfan of described single-chip microcomputer connects
Controlling computer, the control output end of described control computer connects booster circuit.
8. one kind uses the method for testing testing system as claimed in claim 1, it is characterised in that:
(1) each functional module is set in controlling computer, i.e. voltage-withstand test module, leakage current test module, electricity
The preset value of the detection parameter of energy quality analysis module and insulating resistance measuring module；
(2) selected the detection function needed by Keysheet module, input detection signal is to controlling computer, by controlling
Computer sends detection instruction to corresponding functional module, the functional module work of driving correspondence according to detection signal；
(3) each described functional module is after completing detection, and detection data are stored in depositing of each functional module self
In reservoir, when needed, called by controlling computer, simultaneously described in functional module by real-time detector data
Send to controlling computer；
(4) preset value of detection data with the detection data of its storage inside is compared by the computer that controls described in
Relatively, if the size of detection data has exceeded described preset value, then judge that the medical electronic equipment of detection exists peace
Full hidden danger, and send alarm signal.
Method of testing the most according to claim 8, it is characterised in that described method of testing will detect data
Shown by display, it is simple to staff checks.
Method of testing the most according to claim 8, it is characterised in that described method of testing is by each function mould
Block is connected with controlling computer by interface adapter, and each functional module is all independently arranged, and is carrying out security test
Time, need to change at any time functional module according to detection.
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| CN201510368040.6A CN106324376A (en) | 2015-06-29 | 2015-06-29 | Integrated medical onsite safety testing system and method |
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| CN201510368040.6A CN106324376A (en) | 2015-06-29 | 2015-06-29 | Integrated medical onsite safety testing system and method |
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Application publication date: 20170111 |