Medical endoscope equipment and signal isolation device thereof
By using high-speed signal isolation circuits and capacitive isolation modules in medical endoscope equipment, the problem of high signal isolation cost and large volume of the equipment is solved, and the isolation strength is adjustable and flexible design is realized, reducing the material cost and volume of the equipment.
Patent Information
- Application Number
- CN202420538401.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-03-19
AI Technical Summary
The signal isolation devices of existing medical endoscopy equipment are costly and large in size, making it difficult to meet the requirements of high isolation voltage, affecting product design.
High-speed signal isolation circuit is adopted, including high-speed signal input module, capacitive isolation module and high-speed signal output module. High-speed signal isolation module is used to isolate high-speed signal, so that the isolation strength is adjustable and the number of isolation channels is unlimited.
It reduces the material cost and volume of medical endoscopic equipment, improves product design flexibility, and enhances the applicability of signal isolation.
Smart Images
Figure CN222622917U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of endoscopes, in particular to a signal isolation device for medical endoscope equipment and the medical endoscope equipment. Background Art
[0002] Medical endoscope equipment is a medical electrical equipment, which has a dedicated safety standard and clear requirements for isolation, requiring all application circuits to be isolated from the secondary circuit and the mains power circuit. Under normal circumstances, the standard requires a maximum isolation voltage of 4000VAC. If the working voltage of the medical endoscope equipment measured according to the standard exceeds the normal voltage, the isolation voltage requirement is more stringent and may exceed 5000VAC; this is only a requirement for the mains power transformer. In addition, the secondary circuit has similar requirements for the patient circuit.
[0003] At present, conventional medical endoscope equipment uses magnetic isolation or optical fiber isolation. Both solutions can effectively meet conventional standard requirements, but both require the use of expensive and large-volume dedicated devices. When there are many isolation paths, the cost of medical endoscope equipment is very high and the volume is too large, which is not conducive to product design. Therefore, how to reduce the material cost and volume of medical endoscope equipment and improve the flexibility of product design is an urgent problem to be solved today. Utility Model Content
[0004] The utility model aims to provide a signal isolation device for medical endoscope equipment and medical endoscope equipment, so as to reduce the material cost and volume of the medical endoscope equipment and improve the flexibility of product design.
[0005] In order to solve the above technical problems, the utility model provides a signal isolation device for a medical endoscope equipment, including: a high-speed signal isolation circuit, the high-speed signal isolation circuit includes a high-speed signal input module, a capacitor isolation module and a high-speed signal output module connected in sequence; wherein, the high-speed signal input module converts the received high-speed signal into a first bridge electrical signal, and after the first bridge electrical signal is transmitted by the capacitor isolation module, the high-speed signal output module restores the first bridge electrical signal to the high-speed signal; wherein, the high-speed signal includes an image data signal.
[0006] On the other hand, the capacitor isolation module includes a switching control circuit and at least two capacitor isolation circuits, and the switching control circuit is used to select one of the at least two capacitor isolation circuits to be connected between the high-speed signal input module and the high-speed signal output module.
[0007] On the other hand, the capacitive isolation module also includes a timing device, and the switching control circuit is also connected to the timing device for switching the capacitive isolation circuit between the high-speed signal input module and the high-speed signal output module at a preset time interval.
[0008] On the other hand, the capacitive isolation circuit includes a safety capacitor.
[0009] On the other hand, the capacitor isolation circuit includes at least two safety capacitors, and the at least two safety capacitors are connected in series.
[0010] On the other hand, the specification parameters of the at least two safety capacitors are consistent, and the sum of the withstand voltage values of the at least two safety capacitors is greater than the withstand voltage requirement of the capacitor isolation circuit.
[0011] On the other hand, the signal isolation device also includes a low-speed signal isolation circuit, which includes a low-speed signal input module, an optical isolation module and a low-speed signal output module; the low-speed signal input module converts the received low-speed signal into a second bridge electrical signal, and after the second bridge electrical signal is transmitted through the optical isolation module, the low-speed signal output module restores the second bridge electrical signal to the low-speed signal; wherein the low-speed signal includes a control signal and / or a communication signal.
[0012] In another aspect, the optical isolation module includes a light emitting component and a photosensitive component disposed opposite to each other;
[0013] The light emitting component is connected to the low-speed signal input module, and is used to convert the second bridge electrical signal into an optical signal and transmit the optical signal to the photosensitive component;
[0014] The photosensitive component is connected to the low-speed signal output module, and is used to restore the received optical signal into the second bridge electrical signal, and transmit it to the low-speed signal output module;
[0015] Wherein, the light transmission distance between the light-emitting component and the photosensitive component is adjustable.
[0016] On the other hand, the optical isolation module further includes an isolation component, and the light emitting component and the photosensitive component are covered in the isolation component.
[0017] In addition, the utility model also provides a medical endoscope device, including the signal isolation device as described above.
[0018] The utility model provides a signal isolation device for medical endoscope equipment, comprising: a high-speed signal isolation circuit, the high-speed signal isolation circuit comprising a high-speed signal input module, a capacitor isolation module and a high-speed signal output module connected in sequence; wherein the high-speed signal input module converts a received high-speed signal into a first bridge electrical signal, and after the first bridge electrical signal is transmitted through the capacitor isolation module, the high-speed signal output module restores the first bridge electrical signal to a high-speed signal; wherein the high-speed signal comprises an image data signal.
[0019] It can be seen that the utility model uses a capacitor isolation module to isolate high-speed signals through the setting of a high-speed signal isolation circuit, so that the isolation strength of the medical endoscope device is adjustable, and the number of isolation paths is unlimited, which can effectively improve the flexibility of product design and reduce the material cost and volume of the medical endoscope device; and the high-speed signal input module and the high-speed signal output module are responsible for the signal matching and bridging of the high-speed signal, thereby improving the applicability of the device. In addition, the utility model also provides a medical endoscope device, which also has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0021] Figure 1 A schematic diagram of the structure of a signal isolation device for medical endoscope equipment provided by an embodiment of the utility model;
[0022] Figure 2 A schematic structural diagram of a high-speed signal transmission circuit of a signal isolation device of another medical endoscope device provided by an embodiment of the utility model;
[0023] Figure 3 A schematic diagram of another type of safety capacitor series voltage division for medical endoscope equipment provided by an embodiment of the utility model;
[0024] Figure 4 A schematic structural diagram of a low-speed signal transmission circuit of a signal isolation device of another medical endoscope device provided in an embodiment of the utility model. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a signal isolation device for a medical endoscope device provided by an embodiment of the utility model. The device may include: a high-speed signal isolation circuit 10, the high-speed signal isolation circuit 10 includes a high-speed signal input module 11, a capacitive isolation module 12 and a high-speed signal output module 13 connected in sequence; wherein the high-speed signal input module 11 converts the received high-speed signal into a first bridge electrical signal, and after the first bridge electrical signal is transmitted by the capacitive isolation module 12, the high-speed signal output module 13 restores the first bridge electrical signal to a high-speed signal; wherein the high-speed signal includes an image data signal.
[0027] It can be understood that the high-speed signal isolation circuit 10 in this embodiment is used to isolate the circuit for transmitting high-speed signals in the medical endoscope device; the high-speed signal in this embodiment can be a high-speed transmission signal, such as a signal with a transmission rate greater than or equal to 1 mbps; this embodiment does not limit the specific signal type of the high-speed signal, for example, the high-speed signal can include an image data signal, such as an image data signal collected by the camera module of the medical endoscope device, and the high-speed signal can also include LVDS (Low-Voltage Differential Signaling) signal and other signals that require high-speed transmission.
[0028] Correspondingly, each high-speed signal isolation circuit 10 in this embodiment may include a high-speed signal input module 11, a capacitor isolation module 12 and a high-speed signal output module 13 connected in sequence. Among them, the high-speed signal input module 11 and the high-speed signal output module 13 can be responsible for signal matching and bridging of the high-speed signal, and realize the conversion between the high-speed signal and the first bridged electrical signal; the capacitor isolation module 12 can use the internal capacitor (such as a safety capacitor) to isolate and transmit the first bridged electrical signal between the high-speed signal input module 11 and the high-speed signal output module 13.
[0029] Accordingly, the high-speed signal isolation circuit 10 (such as the high-speed signal input module 11) can be used to connect with the high-speed signal output circuit to receive the high-speed signal output by the high-speed signal output circuit; wherein the transmission rate of the high-speed signal is greater than or equal to 1 mbps. For example, the camera module of the medical endoscope device can output the collected image data signal to the high-speed signal input module 11 through the high-speed signal output circuit, so that the image data signal can be isolated and transmitted to the high-speed signal receiving end connected to the high-speed signal output module 13, such as the processor of the medical endoscope device.
[0030] It should be noted that the specific circuit structure of the high-speed signal isolation circuit 10 in this embodiment can be set by the designer. For example, the number of capacitor isolation circuits in the capacitor isolation module 12 can be 1, that is, the capacitor isolation module 12 can include one capacitor isolation circuit for isolating and transmitting the first bridging electrical signal using the capacitor in the circuit; for example, the two ends of the capacitor isolation circuit in the capacitor isolation module 12 can be directly connected to the high-speed signal input module 11 and the high-speed signal output module 13 respectively, and the capacitor in the capacitor isolation circuit is used to isolate and transmit the first bridging electrical signal between the connected high-speed signal input module 11 and the high-speed signal output module 13.
[0031] In addition, considering that the stability of the capacitor isolation module is relatively low, in some embodiments, in order to improve the reliability of the high-speed signal isolation circuit 10, the number of capacitor isolation circuits in the capacitor isolation module 12 may also be greater than 1. Specifically, the capacitor isolation module 12 may include a switching control circuit and at least two capacitor isolation circuits; the switching control circuit may be used to select one of the at least two capacitor isolation circuits to be connected between the high-speed signal input module 11 and the high-speed signal output module 13. In other words, at least two capacitor isolation circuits in the capacitor isolation module 12 may be respectively arranged between the high-speed signal input module 11 and the high-speed signal output module 13 through corresponding controllable switches, so that the switching control circuit can select one capacitor isolation circuit to be connected between the high-speed signal input module 11 and the high-speed signal output module 13 by controlling the conduction and disconnection of the controllable switch, thereby realizing the switching and conduction of the capacitor isolation circuit in the capacitor isolation module 12. Figure 2 As shown, when the capacitor isolation module 12 includes two capacitor isolation circuits, the two capacitor isolation circuits can be used as working capacitor circuits (such as Figure 2 The working capacitor in the circuit) and the backup capacitor circuit (such as Figure 2The switching control circuit can switch the capacitor isolation circuit connected to the high-speed signal input module 11 and the high-speed signal output module 13 according to the demand, that is, the two capacitor isolation circuits can be connected to the high-speed signal input module 11 and the high-speed signal output module 13 at different times; accordingly, the circuit structure of the capacitor isolation circuit can be the same or different. This embodiment does not impose any restrictions on this.
[0032] For example, the switching control circuit can switch each capacitor isolation circuit at intervals to access the high-speed signal input module 11 and the high-speed signal output module 13, so as to avoid the capacitor in the capacitor isolation circuit from working for a long time and improve the service life of the capacitor. For example, in some embodiments, when the capacitor isolation module 12 includes at least two capacitor isolation circuits, the capacitor isolation module 12 can also include a timing device, and the switching control circuit is also connected to the timing device, for switching the capacitor isolation circuit between the high-speed signal input module 11 and the high-speed signal output module 13 at a preset time interval. When the capacitor isolation module 12 includes two capacitor isolation circuits, the switching control circuit can use the timing time of the timing device to switch the capacitor isolation circuit between the high-speed signal input module 11 and the high-speed signal output module 13 at a preset time interval, that is, the two capacitor isolation circuits can be alternately connected to the high-speed signal input module 11 and the high-speed signal output module 13, thereby improving the service life of the capacitor in the capacitor isolation circuit.
[0033] Correspondingly, the specific structure of the capacitor isolation circuit in the capacitor isolation module 12 can be set by the designer according to practical scenarios and user needs. For example, the capacitor isolation circuit in the capacitor isolation module 12 may include safety capacitors, that is, the capacitors in the capacitor isolation circuit may use safety capacitors to improve safety. Correspondingly, the safety capacitors in the capacitor isolation circuit can be set according to the specific isolation voltage requirements of the transmitted high-speed signal. For example, the number of safety capacitors in the capacitor isolation circuit can be 1. Taking the safety capacitor using Y1 safety capacitor as an example, a single Y1 safety capacitor can achieve an isolation voltage of 4000VAC, that is, the withstand voltage (U) is less than or equal to 4kV, the accuracy is ±20%, and the capacitance (C) is 2.2NF. Alternatively, the capacitor isolation circuit in all or part of the high-speed signal isolation circuit 10 can be greater than or equal to 2, and the safety capacitors in the capacitor isolation circuit can be connected in series; such as Figure 3As shown, when two Y1 safety capacitors are connected in series, the capacitor voltage range is 1.76 (2.2 * 80%) NF ≤ C1 or C2 ≤ 2.64 (2.2 * 120%) NF, U1 = U * C2 / (C1 + C2) ≤ 4000V, U2 = U * C1 / (C1 + C2) ≤ 4000V, 1.76NF ≤ C1 ≤ 2.64NF, 1.76NF ≤ C2 ≤ 2.64NF; U ≤ 4000V (C1 / C2 + 1) = 40 00V(1.76 / 2.64+1)≈6666V (taking the minimum value of C1 / C2), U≤4000V(C2 / C1+1)=4000V(1.76 / 2.64+1)≈6666V (taking the minimum value of C2 / C1); that is, the series withstand voltage of two Y1 safety capacitors can be increased to 6666V; that is, in this embodiment, the isolation strength of the capacitor isolation circuit can be improved by using multiple safety capacitors in series in the capacitor isolation circuit.
[0034] In addition, it can be seen from the above that the safety capacitor has a certain precision error. When two or more safety capacitors are connected in series to form a capacitor isolation circuit, the actual withstand voltage of the capacitor isolation circuit may not reach the sum of the withstand voltage values of these safety capacitors. Therefore, in some embodiments, the capacitor isolation circuit in all or part of the high-speed signal isolation circuit 10 may include at least two safety capacitors, at least two safety capacitors are connected in series, the specification parameters of at least two safety capacitors are consistent, and the sum of the withstand voltage values of at least two safety capacitors is greater than the withstand voltage requirement of the capacitor isolation circuit. In this way, sufficient margin can be left for the withstand voltage value of the capacitor isolation circuit to ensure that the capacitor isolation circuit meets its withstand voltage requirements. Among them, when the capacitance parameters of at least two safety capacitors connected in series in the capacitor isolation circuit are consistent, each safety capacitor can be evenly divided to avoid individual safety capacitors from being broken down and failing due to bearing too high a withstand voltage burden.
[0035] Furthermore, the signal isolation device of the medical endoscope equipment provided in this embodiment may also include a low-speed signal isolation circuit, which includes a low-speed signal input module, an optical isolation module and a low-speed signal output module; the low-speed signal input module converts the received low-speed signal into a second bridge electrical signal, and after the second bridge electrical signal is transmitted through the optical isolation module, the low-speed signal output module restores the second bridge electrical signal to a low-speed signal; wherein the low-speed signal includes a control signal and / or a communication signal.
[0036] Among them, the low-speed signal isolation circuit can be a circuit for isolating low-speed signals transmitted in medical endoscope equipment. The low-speed signal in this embodiment can be a signal transmitted at a low speed such as a control signal and / or a communication signal, such as a signal with a transmission rate of less than 1 mbps; for example, the processor of the medical endoscope equipment can output the control signal to the low-speed signal input module of the low-speed signal isolation circuit through the low-speed signal output circuit, so that the control signal can be isolated and transmitted to the corresponding controlled end, such as the camera module of the medical endoscope equipment.
[0037] Correspondingly, each low-speed signal isolation circuit in this embodiment may include a low-speed signal input module, a capacitor isolation module 12 and a low-speed signal output module connected in sequence. Among them, the low-speed signal input module and the low-speed signal output module can be responsible for signal matching and bridging of the low-speed signal, and realize the conversion between the low-speed signal and the second bridged electrical signal; the optical isolation module can isolate and transmit the second bridged electrical signal between the low-speed signal input module and the low-speed signal output module.
[0038] Accordingly, in this embodiment, the optical isolation module can convert the second bridged electrical signal between the low-speed signal input module and the low-speed signal output module into an optical signal for transmission, so as to realize the isolated transmission of the low-speed signal. For example, the optical isolation module may include a light-emitting component and a photosensitive component arranged relatively; the light-emitting component is connected to the low-speed signal input module, and is used to convert the second bridged electrical signal into an optical signal and transmit the optical signal to the photosensitive component; the photosensitive component is connected to the low-speed signal output module, and is used to restore the received optical signal to the second bridged electrical signal and transmit it to the low-speed signal output module; wherein the optical transmission distance between the light-emitting component and the photosensitive component is adjustable.
[0039] That is to say, Figure 4 As shown, the low-speed signal input module can be connected to the low-speed signal output circuit, and is responsible for the signal matching (such as common mode matching) and bridging of the input low-speed signal. It can output the corresponding second bridged electrical signal to drive the light-emitting component (such as a light-emitting diode) in the optical isolation module according to the low-speed signal output by the low-speed signal output circuit. The light-emitting component can convert the second bridged electrical signal into an optical signal to achieve the conversion from electricity to light. The photosensitive component (such as a photosensitive diode) can convert the optical signal emitted by the relatively arranged light-emitting component into a second bridged electrical signal to achieve the conversion from light to electricity. The low-speed signal output module can be responsible for the signal matching and bridging of the output low-speed signal, and convert the second bridged electrical signal transmitted by the photosensitive component into a low-speed signal output.
[0040] Among them, the distance between the light-emitting component and the photosensitive component relatively arranged in the optical isolation module can affect the isolation strength of the low-speed signal, so the designer can set it according to the specific withstand voltage requirements of the transmitted low-speed signal to achieve the effect of adjustable isolation strength of the low-speed signal. Furthermore, in this embodiment, the optical isolation module can also be used to adjust the distance between the light-emitting component and the photosensitive component according to the distance adjustment instruction sent by the received processor, so as to achieve automatic adjustment of the isolation strength of the low-speed signal.
[0041] Furthermore, the optical isolation module in the low-speed signal isolation circuit in this embodiment may also include an isolation component, and the light-emitting component and the photosensitive component in the optical isolation module may be covered in the isolation component. In other words, the isolation component in the optical isolation module may isolate external light to ensure that the optical signal between the internal light-emitting component and the photosensitive component is not affected by external light, thereby ensuring the communication effect of the internal optical communication. For example, the isolation component may be a tubular structure between the light-emitting component and the photosensitive component, such as a tubular circuit that encloses a light-emitting diode and a photosensitive diode.
[0042] It should be noted that this embodiment does not limit the specific number of low-speed signal isolation circuits. For example, in some embodiments, the number of low-speed signal isolation circuits may be 1, and in other embodiments, the number of low-speed signal isolation circuits may be multiple. For example, the transmission of each low-speed signal between all application part circuits and secondary circuits of a medical endoscope device is transmitted through each corresponding low-speed signal isolation circuit.
[0043] In this embodiment, the utility model embodiment uses a capacitor isolation module 12 to perform high-speed signal isolation through the setting of a high-speed signal isolation circuit 10, so that the isolation strength of the medical endoscope equipment is adjustable and the number of isolation paths is unlimited, which can effectively improve the flexibility of product design and reduce the material cost and volume of the medical endoscope equipment; and uses a high-speed signal input module 11 and a high-speed signal output module 13 to be responsible for signal matching and bridging of high-speed signals, thereby improving the applicability of the device.
[0044] Corresponding to the above signal isolation device embodiment, the embodiment of the utility model further provides a medical endoscope device. The medical endoscope device described below and the signal isolation device of the medical endoscope device described above can refer to each other.
[0045] A medical endoscope device comprises: a signal isolation device of the medical endoscope device provided by the above embodiment.
[0046] The above is a detailed introduction to a signal isolation device for a medical endoscope device and a medical endoscope device provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.
Claims
1. A signal isolation device for medical endoscope equipment, characterized in that: include: A high-speed signal isolation circuit, the high-speed signal isolation circuit comprising a high-speed signal input module, a capacitive isolation module and a high-speed signal output module connected in sequence; wherein the high-speed signal input module converts the received high-speed signal into a first bridge electrical signal, and after the first bridge electrical signal is transmitted through the capacitive isolation module, the high-speed signal output module restores the first bridge electrical signal to the high-speed signal; wherein the high-speed signal comprises an image data signal.
2. The signal isolation device according to claim 1, characterized in that: The capacitor isolation module includes a switching control circuit and at least two capacitor isolation circuits, and the switching control circuit is used to select one of the at least two capacitor isolation circuits to be connected between the high-speed signal input module and the high-speed signal output module.
3. The signal isolation device according to claim 2, characterized in that: The capacitive isolation module also includes a timing device, and the switching control circuit is also connected to the timing device for switching the capacitive isolation circuit between the high-speed signal input module and the high-speed signal output module at a preset time interval.
4. The signal isolation device according to claim 2, characterized in that: The capacitor isolation circuit includes a safety capacitor.
5. The signal isolation device according to claim 4, characterized in that: The capacitor isolation circuit includes at least two safety capacitors, and the at least two safety capacitors are connected in series.
6. The signal isolation device according to claim 5, characterized in that: The specification parameters of the at least two safety capacitors are consistent, and the sum of the withstand voltage values of the at least two safety capacitors is greater than the withstand voltage requirement of the capacitor isolation circuit.
7. The signal isolation device according to any one of claims 1 to 6, characterized in that: The signal isolation device also includes a low-speed signal isolation circuit, which includes a low-speed signal input module, an optical isolation module and a low-speed signal output module; the low-speed signal input module converts the received low-speed signal into a second bridge electrical signal, and after the second bridge electrical signal is transmitted by the optical isolation module, the low-speed signal output module restores the second bridge electrical signal to the low-speed signal; wherein the low-speed signal includes a control signal and / or a communication signal.
8. The signal isolation device according to claim 7, characterized in that: The optical isolation module includes a light emitting component and a photosensitive component which are arranged opposite to each other; The light emitting component is connected to the low-speed signal input module, and is used to convert the second bridge electrical signal into an optical signal and transmit the optical signal to the photosensitive component; The photosensitive component is connected to the low-speed signal output module, and is used to restore the received optical signal into the second bridge electrical signal, and transmit it to the low-speed signal output module; Wherein, the light transmission distance between the light-emitting component and the photosensitive component is adjustable.
9. The signal isolation device according to claim 8, characterized in that: The optical isolation module further comprises an isolation component, and the light emitting component and the photosensitive component are covered in the isolation component.
10. A medical endoscope device, characterized in that: It comprises the signal isolation device as claimed in any one of claims 1 to 9.