Host device, camera device, and circuit protection system

Abstract

The embodiment of the utility model provides host equipment, camera equipment and a circuit protection system. The host equipment comprises a first data transceiver module, a first overvoltage protection module, a first overcurrent protection module, a first PoCXP module, a first coaxial cable interface and a host internal transmission module. The first coaxial cable interface is connected with the first data transceiver module through the host internal transmission module, the first overcurrent protection module is connected in series on the host internal transmission module, and the first overvoltage protection module and the first PoCXP module are lapped on the host internal transmission module. Through the first overvoltage protection module and the first overcurrent protection module, low-voltage surge is reduced, and the integrated circuit is protected from being broken down.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of machine vision, especially to host equipment, camera equipment and circuit protection system. BACKGROUND

[0002] CoaXPress is a kind of asymmetric high-speed point-to-point serial communication digital interface standard, which allows devices to be connected to host computer through single coaxial cable, and long-distance transmission of high-speed and low-speed serial signals, and the highest serial transmission speed can reach 12.5Gbps.CoaXPress protocol supports PoCXP (Power Over CoaXPress) function, and host computer can supply DC power to devices through cable, and there are high-speed signals, low-speed signals and power signals on a coaxial line simultaneously, and transmission path is as shown in Figure 1

[0003] Due to the existence of high-speed signals, low-speed signals and power signals, PoCXP circuit filtering is needed to obtain the required signals.PoCXP circuit needs to ensure high impedance within signal bandwidth, so as not to affect data transmission, so the voltage drop of the circuit itself is very small, and in order to ensure transmission efficiency, a higher transmission voltage is usually used.In the prior art, the instantaneous voltage of PoCXP circuit power supply can be raised from 3.3V to 24V, which may break down integrated circuits. INVENTION CONTENTS

[0004] The purpose of the embodiment of the utility model is to provide host equipment, camera equipment and circuit protection system to protect integrated circuits from being broken down.The specific technical scheme is as follows:

[0005] In the first aspect, the utility model provides a kind of host equipment, comprising:

[0006] First data transceiver module, first overvoltage protection module, first overcurrent protection module, first PoCXP module, first coaxial cable interface, host internal transmission module;

[0007] The first coaxial cable interface is connected between the first data transceiver module by the host internal transmission module, the first overcurrent protection module is connected in series on the host internal transmission module, and the first overvoltage protection module and the first PoCXP module are overlapped on the host internal transmission module.

[0008] In a possible implementation, the first PoCXP module includes:

[0009] First power supply module, current voltage detection protection sub-module;

[0010] ​The first end of the first electron supply module is connected to the host internal transmission module, and the second end of the first electron supply module is connected to the current and voltage detection protection sub-module and the first power supply.

[0011] In a possible implementation, the first electron supply module comprises a first filter unit, a second filter unit and a third filter unit.

[0012] The first end of the first filter unit is connected to the host internal transmission module, the second end of the first filter unit is connected to the first end of the second filter unit, the second end of the second filter unit is connected to the first end of the third filter unit, and the second end of the third filter unit is connected to the current and voltage detection protection sub-module and the first power supply.

[0013] In a possible implementation, the host internal transmission module comprises:

[0014] an impedance matching sub-module, a first capacitor and a first connection wire.

[0015] The impedance matching sub-module, the first overcurrent protection module and the first capacitor are connected in series on the first connection wire, one end of the first connection wire is connected to the first coaxial cable interface, and the other end of the first connection wire is connected to the first data transceiver module.

[0016] The first overvoltage protection module is located between the first capacitor and the first data transceiver module at the connection position of the first connection wire, and the first PoCXP module is located between the impedance matching sub-module and the first coaxial cable interface at the connection position of the first connection wire.

[0017] In a possible implementation, the first overcurrent protection module is located on the side close to the first data transceiver module, the impedance matching sub-module is located on the side close to the first coaxial cable interface, and the first capacitor is located between the first overcurrent protection module and the impedance matching sub-module.

[0018] Or,

[0019] The first capacitor is located on the side close to the first data transceiver module, the impedance matching sub-module is located on the side close to the first coaxial cable interface, and the first overcurrent protection module is located between the first capacitor and the impedance matching sub-module.

[0020] In a possible implementation, the first data transceiver module comprises:

[0021] a data receiving module and a data sending module.

[0022] The data receiving module is connected with the first coaxial cable interface through the host internal transmission module;

[0023] The data sending module comprises a first inductor and a first resistor connected in series, and the data sending module is overlapped on the host internal transmission module.

[0024] In the second aspect, the utility model embodiment provides a kind of camera equipment, comprising:

[0025] Second data transceiver module, second overcurrent protection module, second overvoltage protection module, second PoCXP module, second coaxial cable interface, camera internal transmission module;

[0026] The second coaxial cable interface is connected with the second data transceiver module through the camera internal transmission module, the second overcurrent protection module is connected on the camera internal transmission module, and the second overvoltage protection module and the second PoCXP module are overlapped on the camera internal transmission module.

[0027] In a possible implementation, the second PoCXP module comprises:

[0028] Second power supply module, overvoltage and overcurrent protection submodule, second resistor;

[0029] The first end of the second power supply module is overlapped on the camera internal transmission module, the second end of the second power supply module is connected with the overvoltage and overcurrent protection submodule, the first end of the second resistor and the first power supply respectively, and the second end of the second resistor is grounded.

[0030] In a possible implementation, the second power supply module comprises a fourth filter unit, a fifth filter unit and a sixth filter unit.

[0031] The first end of the fourth filter unit is overlapped on the camera internal transmission module, the second end of the fourth filter unit is connected with the first end of the fifth filter unit, the second end of the fifth filter unit is connected with the first end of the sixth filter unit, the second end of the sixth filter unit is connected with the overvoltage and overcurrent protection submodule, the first end of the second resistor and the first power supply respectively, and the second end of the second resistor is grounded.

[0032] In a possible implementation, the camera internal transmission module comprises a second capacitor and a second connection wire;

[0033] The second overcurrent protection module and the second capacitor are connected in series on the second connection wire, one end of the second connection wire is connected with the second coaxial cable interface, and the other end of the second connection wire is connected with the second data transceiver module.

[0034] The second overvoltage protection module is located between the second capacitor and the second data transceiver module at the overlapping position of the second connecting wire.

[0035] In a possible implementation, the second overcurrent protection module is located on the side close to the second data transceiver module, and the second capacitor is located on the side close to the second coaxial cable interface.

[0036] Or,

[0037] The second capacitor is located on the side close to the second data transceiver module, and the second overcurrent protection module is located on the side close to the second coaxial cable interface.

[0038] In a third aspect, the utility model embodiment provides a circuit protection system, including first aspect any described host equipment and second aspect any described camera equipment.

[0039] The utility model embodiment has the beneficial effects that:

[0040] The utility model embodiment provides a host equipment, include: first data transceiver module, first overvoltage protection module, first overcurrent protection module, first PoCXP module, first coaxial cable interface, host internal transmission module, first coaxial cable interface is connected with first data transceiver module through host internal transmission module, and first overcurrent protection module is connected in series on host internal transmission module, and first overvoltage protection module, first PoCXP module overlap on the host internal transmission module. Through first overvoltage protection module and first overcurrent protection module, improve surge protection capability, protect integrated circuit not to be punctured.

[0041] Of course, implementing any product or method of the utility model does not necessarily need to achieve all the advantages described above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other embodiments can be obtained by those skilled in the art according to these drawings.

[0043] Figure 1 It is a transmission path schematic diagram between the host and the device supporting CoaXPress protocol in the related art;

[0044] Figure 2It is the first kind of schematic view of the host equipment of the embodiment of the utility model;

[0045] Figure 3 (a) is the first kind of schematic view of the first PoCXP module in the host equipment of the embodiment of the utility model;

[0046] Figure 3 (b) is the second kind of schematic view of the first PoCXP module in the host equipment of the embodiment of the utility model;

[0047] Figure 4 (a) is the first kind of schematic view of the impedance matching submodule in the host equipment of the embodiment of the utility model;

[0048] Figure 4 (b) is the second kind of schematic view of the impedance matching submodule in the host equipment of the embodiment of the utility model;

[0049] Figure 5 (a) is the second kind of schematic view of the host equipment of the embodiment of the utility model;

[0050] Figure 5 (b) is the third kind of schematic view of the host equipment of the embodiment of the utility model;

[0051] Figure 5 (c) is the fourth kind of schematic view of the host equipment of the embodiment of the utility model;

[0052] Figure 6 It is one kind of schematic view of the data sending module in the host equipment of the embodiment of the utility model;

[0053] Figure 7 It is the first kind of schematic view of the camera equipment of the embodiment of the utility model;

[0054] Figure 8 (a) is the first kind of schematic view of the second PoCXP module in the camera equipment of the embodiment of the utility model;

[0055] Figure 8 (b) is the second kind of schematic view of the second PoCXP module in the camera equipment of the embodiment of the utility model;

[0056] Figure 9 It is the second kind of schematic view of the camera equipment of the embodiment of the utility model;

[0057] Figure 10 It is the third kind of schematic view of the camera equipment of the embodiment of the utility model. DETAILED DESCRIPTION

[0058] The technical scheme 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 only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skilled in the art based on the utility model all belong to the scope of protection of the utility model.

[0059] CoaXPress protocol is one of the latest machine vision standards, which can transmit high-speed and low-speed serial signals through a coaxial cable with transmission impedance of 75Ω for long distance, and the serial transmission speed can reach 12.5Gbps. Such an interface can transmit a large amount of data in a short time, can make high-resolution cameras have higher frame rate, and the data of the device can be transmitted to the host end more in real time, and has a broad development prospect. The CoaXPress protocol also supports PoCXP (Power Over CoaXPress) function, and the host end can supply 24V DC power to the device through the cable, and a single cable can support a load of 13W. That is, there are high-speed signals, low-speed signals and power signals on a coaxial cable at the same time.

[0060] The transmission path between the host and the device supporting the CoaXPress protocol in the related art is shown in Figure 1 The signal transmitted by the processor to the second data transceiver module and the signal transmitted by the first data transceiver module to the control module are high-speed signals, and the highest speed can reach 12.5Gbps; the signal transmitted by the second data transceiver module to the processor and the signal transmitted by the control module to the first data transceiver module are low-speed signals, and the speed is usually 41.6Mbps or 21.83Mbps; the camera device and the host device are connected through an external coaxial cable. Because there are high-speed signals, low-speed signals and power signals at the same time, PoCXP circuit filtering is needed to obtain the required signals. The PoCXP circuit needs to ensure that the impedance is very high within the signal bandwidth, and does not affect the transmission of data, so the voltage drop of the circuit itself is very small. In order to ensure the transmission efficiency, a higher transmission voltage is usually used, and the instantaneous voltage supplied by the PoCXP circuit is lifted from 3.3V to 24V, which may break down the integrated circuit.

[0061] In order to protect the integrated circuit from being broken down, the utility model embodiment provides a host device, a camera device and a circuit protection system, which are described in detail as follows:

[0062] The host device, the camera device and the circuit protection system in the utility model embodiment can support a downlink bandwidth of 12.5Gbps, and are downward compatible with bandwidths of 6.25Gbps, 3.125Gbps and 1.25Gbps; support an uplink bandwidth of 41.6Mbps, and are downward compatible with 21.83Mbps.

[0063] In a first aspect, the utility model embodiment provides a host device, which refers to Figure 2 , comprising:

[0064] The first data transceiver module 101, the first overvoltage protection module 102, the first overcurrent protection module 103, the first PoCXP module 104, the first coaxial cable interface 105, and the host internal transmission module 106;

[0065] The first coaxial cable interface 105 is connected with the first data transceiver module 101 through the host internal transmission module 106, the first overcurrent protection module 103 is connected in series on the host internal transmission module 106, and the first overvoltage protection module 102 and the first PoCXP module 104 are connected on the host internal transmission module 106.

[0066] The first data transceiver module 101 is connected with the first coaxial cable interface 105 through the host internal transmission module 106, and the first coaxial cable interface 105 is used for connecting an external coaxial cable, so as to be connected with a camera device through the external coaxial cable. Data of the camera device is transmitted to the first coaxial cable interface 105 through the external coaxial cable, and then transmitted to the first data transceiver module 101 through the host internal transmission module 106. The first PoCXP module 104 is used for supplying power to the camera device and filtering a data signal, and the power supply signal is transmitted to the first coaxial cable interface 105 through the host internal transmission module 106, and then transmitted to the camera device through the external coaxial cable to realize power supply to the camera device. The first overvoltage protection module 102 and the first overcurrent protection module 103 are used for protecting the first data transceiver module 101 from being broken down when the instantaneous voltage of the first PoCXP module 104 is raised.

[0067] The first overvoltage protection module 102 and the first overcurrent protection module 103 are arranged in the host device to protect the first data transceiver module 101 from being broken down, improve the stability of the host device, reduce the loss rate of the host device, and thus improve the service life of the host device. The type of the host device is not limited in the application, and can be a controller, a computer, a server, a camera, etc.

[0068] In a possible implementation, referring to FIG. 3(a), the first PoCXP module 104 includes:

[0069] The first power supply module 1041 and the current-voltage detection protection sub-module 1042.

[0070] The first power supply module 1041 includes a first filter unit 10411, a second filter unit 10412, and a third filter unit 10413.

[0071] The first end of the first filter unit 10411 is connected to the internal transmission module 106 of the host. The second end of the first filter unit 10411 is connected to the first end of the second filter unit 10412. The second end of the second filter unit 10412 is connected to the first end of the third filter unit 10413. The second end of the third filter unit 10413 is connected to the current and voltage detection and protection submodule 1042 and the first power supply V, respectively. DD connect.

[0072] In one example, referring to Figure 3(b), the first power supply module 1041 specifically includes: a third resistor R3, a fourth resistor R4, a fifth resistor R5, a second inductor L2, a third inductor L3, a fourth inductor L4, a third capacitor C3, and a fourth capacitor C4.

[0073] The first end of the second inductor L2 is connected to the internal transmission module 106 of the host. The second end of the second inductor L2 is connected to the first end of the third inductor L3 and the first end of the third resistor R3. The second end of the third inductor L3 is connected to the first end of the fourth inductor L4, the second end of the third resistor R3, and the first end of the fourth resistor R4. The second end of the fourth inductor L4 is connected to the first end of the fourth resistor R4, the first end of the third capacitor C3, the first end of the fourth capacitor C4, and the first end of the fifth resistor R5. The second end of the fifth resistor R5 is connected to the first power supply V. DD Connection, where V DD It is powered by 24V DC power; the second terminal of the third capacitor C3 and the second terminal of the fourth capacitor C4 are grounded, and the current and voltage detection and protection submodule 1042 is connected in parallel across the fifth resistor R5.

[0074] The host device has a maximum downlink transmission bandwidth of 12.5Gbps, backward compatible with 6.25Gbps, 3.125Gbps, and 1.25Gbps; it supports a maximum uplink bandwidth of 41.6Mbps, backward compatible with 21.83Mbps.

[0075] The third resistor R3, the fourth resistor R4, the fifth resistor R5, the second inductor L2, the third inductor L3, the fourth inductor L4, the third capacitor C3, and the fourth capacitor C4 can be selected according to actual needs, and this utility model does not limit them.

[0076] The current and voltage detection and protection submodule 1042 is used to detect and protect the first power supply V. DD The voltage and current are detected at the first power supply V. DD When the voltage and current are abnormal, necessary protective measures are taken to prevent the camera equipment or the first data transceiver module 101 from burning out. In one example, as shown in Figure 3(b), the current and voltage detection protection submodule 1042 can obtain the first power supply V by detecting the voltage drop across the fifth resistor R5. DD The current is detected by the first power supply V.DD The potential between the fifth resistor R5 and the first power supply V DD .

[0077] In a possible implementation, referring to Fig. 4(a), the host internal transmission module 106 comprises:

[0078] an impedance matching sub-module 1061, a first capacitor C1, and a first connection wire 1062;

[0079] The impedance matching sub-module 1061, the first over-current protection module 103, and the first capacitor C1 are connected in series on the first connection wire 1062, one end of the first connection wire 1062 is connected to the first coaxial cable interface 105, and the other end of the first connection wire 1062 is connected to the first data transceiver module 101.

[0080] The first over-voltage protection module 102 is located between the first capacitor C1 and the first data transceiver module 101 at the joint position of the first connection wire 1062, and the first PoCXP module 104 is located between the impedance matching sub-module 1061 and the first coaxial cable interface 105 at the joint position of the first connection wire 1062.

[0081] In an example, the host internal transmission module 106 can be a circuit board, the impedance matching sub-module 1061 and the first capacitor C1 can be components on the circuit board, and the first connection wire 1062 can be a wiring of the circuit board.

[0082] The impedance matching sub-module 1061 is configured to perform impedance matching on the signal, and specifically, can filter out the voltage signal of the first power supply V DD . In an example, referring to Fig. 4(b), the impedance matching sub-module 1061 comprises a sixth resistor R6 and a fifth inductor L5, and the sixth resistor R6 and the fifth inductor L5 are connected in parallel. The sixth resistor R6 and the fifth inductor L5 can be selected according to actual needs, and the utility model is not limited.

[0083] In a possible implementation, referring to Figs. 5(a) and 5(b), the first over-current protection module 103 is located on the side close to the first data transceiver module 101, the impedance matching sub-module 1061 is located on the side close to the first coaxial cable interface 105, and the first capacitor C1 is located between the first over-current protection module 103 and the impedance matching sub-module 1061.

[0084] Or,

[0085] Referring to Fig. 4(a), the first capacitor C1 is located on the side close to the first data transceiver module 101, the impedance matching sub-module 1061 is located on the side close to the first coaxial cable interface 105, and the first over-current protection module 103 is located between the first capacitor C1 and the impedance matching sub-module 1061.

[0086] In one example, referring to Fig. 5(c), the first overvoltage protection module 102 is specifically a first transistor T1, and the first overcurrent protection module 103 is specifically a seventh resistor R7, and the size of the first transistor T1 and the seventh resistor R7 can be selected according to actual needs, and the utility model does not make limitation. It should be noted that the positional relationship of the first overvoltage protection module 102 and the first overcurrent protection module 103 is not only as shown in Fig. 4(a) and Fig. 5(a)-Fig. 5(c), and the drawings are only several examples conforming to the utility model. The specific structure of the first overvoltage protection module 102 and the first overcurrent protection module 103 is not only limited to a transistor and a resistor, and the structure capable of achieving overvoltage and overcurrent protection effects all belongs to the protection scope of the utility model.

[0087] In one possible implementation, referring to Fig. 1, Figure 6 The first data transceiver module 101 comprises:

[0088] The data receiving module 1011 and the data sending module 1012;

[0089] The data receiving module 1011 is connected between the first coaxial cable interface 105 and the host internal transmission module 106;

[0090] The data sending module 1012 comprises a first inductor L1 and a first resistor R1 connected in series, and the data sending module 1012 is connected to the host internal transmission module 106.

[0091] The data sending module 1012 can send the communication message of the processor in the host device to the host internal transmission module 106, and simultaneously transmit the communication message to the camera device via the first coaxial cable interface 105 and the external coaxial cable.

[0092] In a second aspect, the utility model provides a camera device, referring to Fig. 2, Figure 7 The camera device comprises:

[0093] The second data transceiver module 201, the second overcurrent protection module 202, the second overvoltage protection module 203, the second PoCXP module 204, the second coaxial cable interface 205 and the camera internal transmission module 206;

[0094] The second coaxial cable interface 205 is connected between the second data transceiver module 201 and the camera internal transmission module 206, the second overcurrent protection module 202 is connected to the camera internal transmission module 206 in series, and the second overvoltage protection module 203 and the second PoCXP module 204 are connected to the camera internal transmission module 206.

[0095] The second data transceiver module 201 is connected with the second coaxial cable interface 205 through the camera internal transmission module 206, and the second coaxial cable interface 205 is connected with the first coaxial cable interface 105 of the host device through the external coaxial cable. The data signal is transmitted to the second data transceiver module 201 through the camera internal transmission module 206; the second PoCXP module 204 is used for supplying power to the camera device and filtering the data signal to obtain a single high-speed or low-speed signal; the second overvoltage protection module 203 and the second overcurrent protection module 202 are used for protecting the second data transceiver module 201 from being broken down when the transient voltage of the second PoCXP module 204 is raised.

[0096] The second overcurrent protection module 202 and the second overvoltage protection module 203 are arranged in the camera device to protect the second data transceiver module 201 from being broken down, thereby improving the stability of the camera device and reducing the loss rate of the camera device, so as to prolong the service life of the camera device.

[0097] In a possible implementation, referring to FIG. 8(a), the second PoCXP module 204 includes:

[0098] The second power supply module 2041, the overvoltage and overcurrent protection submodule 2042, and the second resistor R2;

[0099] The second power supply module 2041 includes a fourth filter unit 20411, a fifth filter unit 20412, and a sixth filter unit 20413.

[0100] The first end of the fourth filter unit 20411 is connected with the camera internal transmission module 206, the second end of the fourth filter unit 20411 is connected with the first end of the fifth filter unit 20412, the second end of the fifth filter unit 20412 is connected with the first end of the sixth filter unit 20413, and the second end of the sixth filter unit 20413 is respectively connected with the overvoltage and overcurrent protection submodule 2042, the first end of the second resistor R2, and the first power supply V DD The second end of the second resistor R2 is grounded.

[0101] In an example, referring to FIG. 8(b), the second power supply module 2041 specifically includes a sixth inductor L6, a seventh inductor L7, an eighth inductor L8, an eighth resistor R8, a ninth resistor R9, a fifth capacitor C5, and a sixth capacitor C6.

[0102] The first end of the sixth inductor L6 is connected to the camera internal transmission module 206, the second end of the sixth inductor L6 is connected to the first end of the seventh inductor L7 and the first end of the eighth resistor R8, the second end of the seventh inductor L7 is connected to the second end of the eighth resistor R8, the first end of the eighth inductor L8 and the first end of the ninth resistor R9, the second end of the eighth inductor L8 is connected to the second end of the ninth resistor R9, the first end of the fifth capacitor C5, the first end of the sixth capacitor C6, the first end of the second resistor R2, the over-voltage and over-current protection sub-module 2042, the first power supply V DD is connected, wherein V DD is a 24V DC power supply; the second end of the fifth capacitor C5 and the second end of the sixth capacitor C6 are grounded.

[0103] The sizes of the sixth inductor L6, the seventh inductor L7, the eighth inductor L8, the eighth resistor R8, the ninth resistor R9, the fifth capacitor C5 and the sixth capacitor C6 can be selected according to actual needs, and the utility model is not limited.

[0104] The maximum downlink transmission bandwidth of the camera device is 12.5Gbps, and is downward compatible with 6.25Gbps, 3.125Gbps and 1.25Gbps; and the maximum uplink bandwidth supported is 41.6Mbps, and is downward compatible with 21.83Mbps.

[0105] In a possible implementation, referring to Figure 9 , the camera internal transmission module 206 comprises a second capacitor C2 and a second connection wire 2061.

[0106] The second over-current protection module 202 and the second capacitor C2 are connected in series on the second connection wire 2061, one end of the second connection wire 2061 is connected to the second coaxial cable interface 205, and the other end of the second connection wire 2061 is connected to the second data transceiver module 201.

[0107] The second over-voltage protection module 203 is located between the second capacitor C2 and the second data transceiver module 201 at the connection position of the second connection wire 2061; and the second PoCXP module 204 is located between the second capacitor C2 and the second coaxial cable interface 205 at the connection position of the second connection wire 2061.

[0108] The size of the second capacitor C2 can be selected according to actual needs, and the utility model is not limited.

[0109] In a possible implementation, referring to Figure 9 , the second over-current protection module 202 is located on the side close to the second data transceiver module 201, and the second capacitor C2 is located on the side close to the second coaxial cable interface 205.

[0110] Or,

[0111] Referring to Figure 10 The second overcurrent protection module 202 is located on the side close to the second coaxial cable interface 205.

[0112] The structure and positional relationship of the second overcurrent protection module 202 and the second overvoltage protection module 203 can refer to the first overcurrent protection module 103 and the first overvoltage protection module 102 of the first aspect, and will not be described here.

[0113] In a third aspect, the utility model discloses a kind of circuit protection systems, including any one of the host device of the first aspect and any one of the camera device of the second aspect.

[0114] In the circuit protection system of the utility model, overvoltage protection module and overcurrent protection module are arranged in the host device and the camera device end, the stability of circuit is increased, data transmission is safer, and the loss rate of the host device and the camera device is reduced, the service life of the host device and the camera device is improved.

[0115] It should be noted that in this document, relationship terms such as first and second are used only to differentiate one entity or action from another, and do not necessarily require or imply these entities or actions have any such actual relationship or order. In addition, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0116] Each embodiment in the specification is described in a relevant manner, and the same and similar parts between each embodiment can be referred to each other, and each embodiment mainly explains the difference from other embodiments. Especially, for system embodiment, since it is basically similar to device embodiment, the description is relatively simple, and the relevant part can refer to the part of the description of device embodiment.

[0117] The above is only the preferred embodiment of the utility model, and is not used to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model are included in the protection scope of the utility model.

Claims

1. A host device, characterized in that, include: First data transceiver module, first overvoltage protection module, first overcurrent protection module, first PoCXP module, first coaxial cable interface, and host internal transmission module; The first coaxial cable interface is connected to the first data transceiver module through the host internal transmission module. The first overcurrent protection module is connected in series with the host internal transmission module. The first overvoltage protection module and the first PoCXP module are connected to the host internal transmission module.

2. The host device according to claim 1, characterized in that, The first PoCXP module includes: First power supply module, current and voltage detection and protection sub-module; The first end of the first power supply module is connected to the internal transmission module of the host, and the second end of the first power supply module is connected to the current and voltage detection and protection submodule and the first power supply, respectively.

3. The host device according to claim 1, characterized in that, The host internal transmission module includes: Impedance matching submodule, first capacitor, first connection trace; The impedance matching submodule, the first overcurrent protection module and the first capacitor are connected in series on the first connection line. One end of the first connection line is connected to the first coaxial cable interface and the other end of the first connection line is connected to the first data transceiver module. Specifically, the first overvoltage protection module is located between the first capacitor and the first data transceiver module at the overlap position of the first connection trace; the first PoCXP module is located between the impedance matching submodule and the first coaxial cable interface at the overlap position of the first connection trace.

4. The host device according to claim 3, characterized in that, The first overcurrent protection module is located on the side closer to the first data transceiver module, the impedance matching submodule is located on the side closer to the first coaxial cable interface, and the first capacitor is located between the first overcurrent protection module and the impedance matching submodule. or, The first capacitor is located on the side closer to the first data transceiver module, the impedance matching submodule is located on the side closer to the first coaxial cable interface, and the first overcurrent protection module is located between the first capacitor and the impedance matching submodule.

5. The host device according to claim 1, characterized in that, The first data transceiver module includes: Data receiving module, data sending module; The data receiving module is connected to the first coaxial cable interface via the host internal transmission module; The data transmission module includes a first inductor and a first resistor connected in series, and the data transmission module is connected to the internal transmission module of the host.

6. A camera device, characterized in that, include: Second data transceiver module, second overcurrent protection module, second overvoltage protection module, second PoCXP module, second coaxial cable interface, camera internal transmission module; The second coaxial cable interface is connected to the second data transceiver module through the camera's internal transmission module. The second overcurrent protection module is connected in series with the camera's internal transmission module. The second overvoltage protection module and the second PoCXP module are connected to the camera's internal transmission module.

7. The camera device according to claim 6, characterized in that, The second PoCXP module includes: Second power supply module, overvoltage and overcurrent protection submodule, second resistor; The first end of the second power supply module is connected to the internal transmission module of the camera, and the second end of the second power supply module is connected to the overvoltage and overcurrent protection submodule, the first end of the second resistor, and the first power supply, respectively. The second end of the second resistor is grounded.

8. The camera device according to claim 6, characterized in that, The camera's internal transmission module includes: a second capacitor and a second connection cable; The second overcurrent protection module and the second capacitor are connected in series on the second connection line. One end of the second connection line is connected to the second coaxial cable interface, and the other end of the second connection line is connected to the second data transceiver module. Specifically, the second overvoltage protection module is located between the second capacitor and the second data transceiver module at the overlap position of the second connection cable; the second PoCXP module is located between the second capacitor and the second coaxial cable interface at the overlap position of the second connection cable.

9. The camera device according to claim 8, characterized in that, The second overcurrent protection module is located on the side closer to the second data transceiver module, and the second capacitor is located on the side closer to the second coaxial cable interface; or, The second capacitor is located on the side closer to the second data transceiver module, and the second overcurrent protection module is located on the side closer to the second coaxial cable interface.

10. A circuit protection system, characterized in that, Includes the host device according to any one of claims 1-5 and the camera device according to any one of claims 6-9.

Images