CN207440218U - A kind of leak current detection device of Medical Devices - Google Patents
A kind of leak current detection device of Medical Devices Download PDFInfo
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- CN207440218U CN207440218U CN201721629145.3U CN201721629145U CN207440218U CN 207440218 U CN207440218 U CN 207440218U CN 201721629145 U CN201721629145 U CN 201721629145U CN 207440218 U CN207440218 U CN 207440218U
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- resistance
- human body
- circuit
- leakage current
- medical devices
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Abstract
In order to solve the problems, such as that existing utilization human body resistance detects that leakage current is not accurate, the utility model provides a kind of leak current detection device of Medical Devices, belongs to safety, the detection field of medical electronic apparatus.The utility model includes human body simulation resistance, current transformer, amplifying circuit, analog to digital conversion circuit and control circuit, before Medical Devices, detect the human body resistance of operator and patient respectively using human body resistance test circuit, control circuit sets the resistance value of human body simulation resistance according to the human body resistance tested, Medical Devices are started to work, the leakage current at the leakage current test end of Medical Devices flows into human body simulation resistance, the electric current amplifies through amplifying circuit, control circuit is sent to after analog to digital conversion circuit carries out analog-to-digital conversion, and then control circuit obtains leakage current.It is more accurate to test leakage current closer to the human body resistance of operator and patient for the resistance value of the body artifical resistance of the utility model.
Description
Technical field
The utility model is related to a kind of leak current detection device, the leakage current test dress of more particularly to a kind of Medical Devices
It puts, belongs to safety, the detection field of medical electronic apparatus.
Background technology
Shell, the electrode of human contact, probe etc. have due to leakage current caused by AC power in existing Medical Devices
In the presence of, and leakage current constitutes certain threat to the safety and health of operator and patient.
The charging member of any exposure of global Medical Devices is isolated with patient's connection, that is, uses insulation, and medical treatment
The electric insulation of equipment must be such that the leakage current through insulation is limited in below defined numerical value.
There are many kinds of existing leakage current detection ways, and one of which utilizes the human body resistance of resistance simulation user, detection
The electric current of the human body resistance is flowed through, realizes detection leakage current.Human body resistance in addition to the self-resistance of people, also answer affix human body with
The resistance such as outer clothes, footwear, trousers, although human body resistance generally up to 5000 Ω, it is many to influence the factor of human body resistance,
As moist skin perspires, the contact area with conductive dust, increasing and electrical body and pressure and clothes, footwear, socks tide
Situations such as wet oil is dirty can reduce human body resistance.So it is detected using a measuring resistance proprietary human body resistance of equal value
The leakage current arrived is not accurate.
The content of the invention
The purpose of the present invention is to solve existing the problem of leakage current is not accurate, this practicality are detected using human body resistance
A kind of new leak current detection device of Medical Devices of offer.
A kind of leak current detection device of Medical Devices of the utility model, the detection device include human body simulation resistance
2nd, current transformer 3, amplifying circuit, analog to digital conversion circuit and control circuit, one end of human body simulation resistance 2 are used to connect medical treatment
The leakage current test end 5 of equipment, the other end of human body simulation resistance 2 and the current input terminal of amplifying circuit connect, amplifying circuit
Current amplifier signal output part and analog to digital conversion circuit current analog signal input terminal connect, the electric current of analog to digital conversion circuit
Digital signal output end and the leakage current digital signal input end of control circuit connect；
The detection device further includes human body resistance test circuit 1；
The human body resistance test circuit 1 is used to detect the human body resistance of tested personnel, human body resistance test circuit 1
Test resistance signal output part and the test resistance signal input part of control circuit connect, and the human body simulation resistance 2 is adjustable
Economize on electricity resistance, the resistance adjustment signal output part of control circuit and the resistance adjustment signal input part of the human body simulation resistance 2 connect
It connects.
Preferably, the detection device, which further includes, detects and selects circuit 4；It is arranged on the leakage current inspection of tested Medical Devices
It surveys between end 5 and human body simulation resistance 2, detects and selects circuit there are four input terminal, connect tested Medical Devices respectively over the ground
Leakage current test end, body leakage stream test side, patient leakage current test side or patient aid in leakage current test end, detect and select
The output terminal of circuit 4 is used to connect one end of the human body simulation resistance 2.
Preferably, the detection device further includes display circuit, the leakage current digital displaying signal output of control circuit
End is connected with the leakage current digital displaying signal input terminal of display circuit.
Preferably, the detection device further includes warning circuit, the leakage current alarm signal output of the control circuit
End is connected with the leakage current alarm signal input terminal of warning circuit.
Preferably, human body simulation resistance 2 is connected using n resistance, while one relay of each resistor coupled in parallel, control
Circuit is adjusted to the resistance value needed, n is more than 1 by the way that the break-make of relay is controlled to realize the variation of 2 resistance value of human body simulation resistance
Positive integer.
Above-mentioned technical characteristic may be combined in various suitable ways or be substituted by equivalent technical characteristic, as long as can reach
To the purpose of the present invention.
The beneficial effects of the utility model are, the utility model be before Medical Devices are used, test operator and
The real-time human body resistance of patient according to the real-time body's resistance tested, adjusts the resistance value of human body simulation resistance, utilizes the human body
Artifical resistance detects associated leakage current, because the resistance value of human body simulation resistance is surveyed closer to the human body resistance of operator and patient
Leak test electric current is more accurate.The utility model also has simultaneously：The choosing of circuit is detected and selected by control circuit or manually control
It is logical, realize that the utility model carries out the detection that Ground leakage current, body leakage stream, patient leakage current or patient aid in leakage current.
The leakage current detected is shown that, when the leakage current is more than given threshold, control circuit controls warning circuit by control circuit
It alarms.
Description of the drawings
Fig. 1 is the electrical principle signal of the leak current detection device of the Medical Devices in specific embodiment of the present invention
Figure；
Fig. 2 is the human body simulation resistance 2 in specific embodiment of the present invention and the electrical principle for detecting and selecting circuit 4
Schematic diagram；
Fig. 3 is the electronic schematic diagram of the human body resistance test circuit 1 in specific embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The invention will be further described in the following with reference to the drawings and specific embodiments, but not as limiting to the invention.
The present embodiment will be described with reference to Fig. 1, a kind of leak current detection device of Medical Devices described in present embodiment, bag
Include human body resistance test circuit 1, human body simulation resistance 2, current transformer 3, amplifying circuit, analog to digital conversion circuit and control electricity
Road；
Before Medical Devices is used to treat, the human body of tested personnel is detected first with human body resistance test circuit 1
Resistance, the tested personnel of present embodiment are the operator or patient of Medical Devices, and human body resistance test circuit 1 arrives test
Human body resistance be sent to control circuit, the human body simulation resistance 2 of present embodiment is adjustable resistor, and control circuit is according to reality
When the human body resistance tested adjust the resistance value of human body simulation resistance 2；
Start to test leakage current：Tested Medical Devices are opened, by the leakage current test end 5 of tested Medical Devices and human mould
Intend one end connection of resistance 2, the leakage current of tested Medical Devices test side is inputted to human body simulation resistance 2, human body simulation resistance 2
Electric current be flowed into current transformer 3, the electric current that current transformer 3 detects is inputted to amplifying circuit, amplify through amplifying circuit
After input to analog to digital conversion circuit, input is to control circuit after analog to digital conversion circuit carries out analog-to-digital conversion, and control circuit is according to defeated
The current signal entered obtains the numerical value of leakage current；
As shown in figure 3, the human body resistance test circuit 1 of present embodiment is realized using existing human body resistance detector,
The detector is followed including two pulse output end A, B, two pulse input end C, D, pulse converter, No. 1 wave filter, No. 1
Device, No. 2 wave filters and No. 2 followers, specific measurement process are：
Control circuit controls pulse converter by pulse output end A to tested personnel's input pulse signal, due to people
There is impedance, capacitive reactance etc. and decays in body, then is exported by input terminal C and D from human body to two wave filters, the filtered device of difference
Sampled with follower, obtain two attenuation pulse signals to control circuit, control circuit to two attenuation pulse signals into
Row relatively amplification obtains detection current value；
Control circuit controls pulse converter by pulse output end B to tested personnel's input pulse signal, and A stops,
Filtered device and follower are sampled the two attenuation pulse signals obtained respectively, are obtained two attenuation pulse signals and are extremely controlled
Acquisition detection current value is compared and enlarged to two attenuation pulse signals in circuit processed, control circuit；
The detection current value obtained according to the above process carries out comparison calibration, and electricity is obtained after being weighted to calibration value averagely
Flow valuve obtains the resistance of tested personnel according to the current value；
The human body resistance detector of present embodiment eliminates the oxidation of electrode, air humidity, wet with human contact face
The measured deviation that the external factor such as degree are brought so that testing result is more accurate.
As shown in Fig. 2, the human body simulation resistance 2 of present embodiment is connected using n resistance, while each resistor coupled in parallel one
A relay, control circuit are adjusted by the way that the break-make of relay is controlled to realize the variation of 2 resistance value of human body simulation resistance to needs
Resistance value, n are the positive integer more than 1.
The amplifying circuit of present embodiment is realized using MAX4461H.
The analog to digital conversion circuit of present embodiment is realized using ADS1115.
The control circuit of present embodiment is realized using chip STC89C52RC.
Present embodiment is test operator and the real-time human body resistance of patient, according to survey before Medical Devices are used
The real-time body's resistance tried adjusts the resistance value of human body simulation resistance 2, and associated leakage current is detected using the human body artifical resistance 2,
Because it is more accurate to test leakage current closer to the human body resistance of operator and patient for the resistance value of human body simulation resistance 2.
In preferred embodiment, as shown in Fig. 2, present embodiment, which further includes, detects and selects circuit 4；
It is arranged between the leakage current test end 5 of tested Medical Devices and human body simulation resistance 2, detecting and selecting circuit 4 has
Four input terminals connect the Ground leakage current test side, body leakage stream test side, patient leakage current of tested Medical Devices respectively
Test side or patient aid in leakage current test end, and the output terminal for detecting and selecting circuit 4 is same as connecting the human body simulation resistance 2
One end.
Present embodiment can detect and select the gating of circuit 4 by control circuit or manually control, realize that this practicality is new
Type carries out the detection that Ground leakage current, body leakage stream, patient leakage current or patient aid in leakage current.
In preferred embodiment, present embodiment further includes display circuit；
The leakage current detected is shown that person and patient easy to operation intuitively obtain by control circuit using display circuit
The numerical value of leakage current.
In preferred embodiment, present embodiment further includes warning circuit；
Control circuit compares the leakage current of detection with secure threshold, if beyond threshold value, output alarm signal
To warning circuit, warning circuit is alarmed after receiving alarm signal, convenient for prompting operator and patient.
Although the present invention is described herein with reference to specific embodiment, it should be understood that, these realities
Apply the example that example is only principles and applications.It should therefore be understood that exemplary embodiment can be carried out
Many modifications, and can be designed that other arrangements, without departing from the spirit of the present invention as defined in the appended claims
And scope.It it should be understood that can be by being different from the described mode of original claim come with reference to different appurtenances
Profit requirement and feature described herein.It will also be appreciated that it can be used with reference to the described feature of separate embodiments
In other described embodiments.
Claims (5)
1. a kind of leak current detection device of Medical Devices, the detection device includes human body simulation resistance (2), current transformer
(3), amplifying circuit, analog to digital conversion circuit and control circuit, one end of human body simulation resistance (2) are used to connect the leakage of Medical Devices
Current detecting end (5), the other end of human body simulation resistance (2) and the current input terminal of amplifying circuit connect, the electricity of amplifying circuit
The current analog signal input terminal for banishing big signal output part and analog to digital conversion circuit connects, the current digital of analog to digital conversion circuit
Signal output part and the leakage current digital signal input end of control circuit connect；
It is characterized in that, the detection device further includes human body resistance test circuit (1)；
The human body resistance test circuit (1) is used to detect the human body resistance of tested personnel, human body resistance test circuit (1)
Test resistance signal output part and the test resistance signal input part of control circuit connect, and the human body simulation resistance (2) is can
Regulation resistance, the resistance adjustment signal output part of control circuit and the resistance adjustment signal of the human body simulation resistance (2) input
End connection.
2. the leak current detection device of Medical Devices according to claim 1, which is characterized in that the detection device is also wrapped
It includes and detects and selects circuit (4)；It is arranged between the leakage current test end (5) of tested Medical Devices and human body simulation resistance (2), examines
Selection circuit is surveyed there are four input terminal, connects Ground leakage current test side, the detection of body leakage stream of tested Medical Devices respectively
End, patient leakage current test side or patient aid in leakage current test end, and it is described for connecting to detect and select the output terminal of circuit (4)
One end of human body simulation resistance (2).
3. the leak current detection device of Medical Devices according to claim 1, which is characterized in that the detection device is also wrapped
Display circuit is included, the leakage current digital displaying signal output terminal of control circuit and the leakage current digital displaying signal of display circuit are defeated
Enter end connection.
4. the leak current detection device of Medical Devices according to claim 1, which is characterized in that the detection device is also wrapped
Include warning circuit, the leakage current alarm signal output ends of the control circuit and the leakage current alarm signal input terminal of warning circuit
Connection.
5. the leak current detection device of Medical Devices according to claim 1, which is characterized in that human body simulation resistance (2)
It is connected using n resistance, while one relay of each resistor coupled in parallel, control circuit is by controlling the break-make of relay to realize people
The variation of body artifical resistance (2) resistance value is adjusted to the resistance value needed, and n is the positive integer more than 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721629145.3U CN207440218U (en) | 2017-11-29 | 2017-11-29 | A kind of leak current detection device of Medical Devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721629145.3U CN207440218U (en) | 2017-11-29 | 2017-11-29 | A kind of leak current detection device of Medical Devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207440218U true CN207440218U (en) | 2018-06-01 |
Family
ID=62285387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721629145.3U Expired - Fee Related CN207440218U (en) | 2017-11-29 | 2017-11-29 | A kind of leak current detection device of Medical Devices |
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| Country | Link |
|---|---|
| CN (1) | CN207440218U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630685A (en) * | 2020-12-23 | 2021-04-09 | 万帮数字能源股份有限公司 | Leakage current detection circuit, detection system and detection method |
| CN113296019A (en) * | 2021-05-08 | 2021-08-24 | 上海盛位电子技术有限公司 | Electric leakage detection device, electric leakage detection method and charging equipment |
-
2017
- 2017-11-29 CN CN201721629145.3U patent/CN207440218U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630685A (en) * | 2020-12-23 | 2021-04-09 | 万帮数字能源股份有限公司 | Leakage current detection circuit, detection system and detection method |
| CN113296019A (en) * | 2021-05-08 | 2021-08-24 | 上海盛位电子技术有限公司 | Electric leakage detection device, electric leakage detection method and charging equipment |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20180601 Termination date: 20211129 |