CN209072517U - High-isolation analog signal bus - Google Patents

Abstract

The utility model discloses a kind of high-isolation analog signal bus, including transmission line analog signal, sub-miniature A connector, data/address bus and for the interface module with external communication；The transmission line analog signal is two, and every transmission line analog signal is connected with high-isolation low loss switching；Analog signal is inputted or is exported by being connected with sub-miniature A connector by the high-isolation low loss switching；Each high-isolation low loss switching is connected with data/address bus, is connected with control module between the data/address bus and interface module.The high-isolation analog signal bus of the utility model can carry out process control, realize accurate, reliable measurements to analog signal, and easy to operate.

Description

High-isolation analog signal bus

Technical field

The utility model belongs to analog signal measurement apparatus technical field, and in particular to a kind of high-isolation analog signal is total Line.

Background technique

When measuring to multiple measured analog signals, need constantly to carry out measured signal human relay working, it is right In automatic measurement process, it is difficult to realize artificial real-time signal converting；More in measured analog signal, measuring instrument is more, surveys In the case that the input terminal of measuring appratus is more, continuous analog signal of transferring is more difficult.Due to the artificial continuous of analog signal Switching, reduces the stability, repeatability, accuracy of measurement, while easily causing the mistake of switching.Moreover, analog signal is different In digital signal, all have high requirements to the noise of switching, decaying, distortion, phase, crosstalk etc., in time and frequency measurement field This is required high.

Currently, during the test, usually there are 5 to 10 tested analog signals, need 5 to 8 set measuring instruments to these Analog signal measures, and every measuring instrument has 2 or more input terminals.These measured frequency analog signal ranges one As be 1Hz to 100MHz, amplitude range is -100dBm to+20dBm, and insulated degree requirement is not between when measurement each analog signal Less than -120dB, signal decaying is not more than 1dB.It can be seen that these measured frequency analog signal ranges are wide, amplitude range Greatly, each sigtnal interval when measurement requires high from degree, and signal attenuation requirement is small.

Summary of the invention

In view of the drawbacks of the prior art with deficiency, the utility model is total by providing a kind of high-isolation analog signal Line.

To achieve the above object, the technical solution of the utility model are as follows:

A kind of high-isolation analog signal bus, including transmission line analog signal, sub-miniature A connector, data/address bus and be used for With the interface module of external communication；The transmission line analog signal is two, and every transmission line analog signal is and high-isolation Low loss switching is connected；Analog signal is inputted or is exported by being connected with sub-miniature A connector by the high-isolation low loss switching；Often A high-isolation low loss switching is connected with data/address bus, and control mould is connected between the data/address bus and interface module Block.

Further, there are two types of connection, a kind of input terminal as analog signal and external tested simulation letters for the sub-miniature A connector Number it is connected, another output end as analog signal is connected with measuring device.

Further, each high-isolation low loss switching is there are two connectivity port, respectively with two analog signal bus In wherein one be connected.

Further, there are four switch contacts in each high-isolation low loss switching, wherein every two contact is serially connected A signal paths are constituted, two signal paths are separately connected wherein one in two analog signal bus.

Further, the high-isolation low loss switching is divided into analog signal input control switch and analog signal output control Two kinds of switch of system, the analog signal input control switch are connected with the sub-miniature A connector as input terminal, the analog signal output Control switch is connected with the sub-miniature A connector as output end.

Preferably, the transmission line analog signal is made by half steel cable.

Preferably, the both ends of each high-isolation low loss switching pass through respectively a T connector access to analog signal biography On defeated line.

Compared with prior art, the advantages of the utility model:

(1) the utility model realizes the transmission of analog signal dual bus, control.

(2) the utility model degree of isolation in analog signal measurement is high, loss of signal degree is low.

(3) the high-isolation analog signal bus structure of the utility model is simple, design is scientific and reasonable.

(4) the utility model is accessed to high-isolation low loss switching on transmission line analog signal using T connector, this Kind T-type connection type can connect more signal ends.

(5) the utility model is attached between two transmission line analog signals by multiple high isolation switches, is made Connection is more convenient.

The high-isolation analog signal bus of the utility model can carry out process control as a result, realize to analog signal Accurate, reliable measurements, and it is easy to operate.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is the structural schematic diagram of the high-isolation analog signal bus of the utility model；

Fig. 2 is the circuit diagram of the high-isolation analog signal bus of the utility model；

Fig. 3 is the partial schematic diagram at the high-isolation low loss switching of the utility model.

Specific embodiment

Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.

As shown in Figs. 1-2, a kind of high-isolation analog signal bus, including transmission line analog signal, sub-miniature A connector, data Bus and for the interface module with external communication, the transmission line analog signal is two, and (analog signal i.e. in figure passes Defeated line A and transmission line analog signal B), it is made by half steel cable.Two transmission line analog signals are low with high-isolation Loss switch is connected, and the both ends of each high-isolation low loss switching pass through a T connector respectively and access to analog signal transmission On line.Analog signal is inputted or is exported by being connected with sub-miniature A connector by the high-isolation low loss switching, specifically, described There are two types of connection, a kind of input terminals as analog signal to be connected with the tested analog signal in outside for sub-miniature A connector, and another kind is used as mould The output end of quasi- signal is connected with measuring device.With as input terminal sub-miniature A connector (i.e. in figure analog signal input 1, 2......N) connected high-isolation low loss switching, and (analog signal inputs N i.e. in figure with the sub-miniature A connector as output end + 1, N+2......N+m) connected high-isolation low loss switching is distributed in distance.Each high-isolation low loss switching with Data/address bus is connected, and control module is connected between the data/address bus and interface module, and the control module is total by data The on-off of line traffic control high-isolation low loss switching.

The effect of each component is introduced in detail below:

Sub-miniature A connector: sub-miniature A connector is the analog signal input of whole device, output port, is tested mould outside external connection Intend signal or measuring device, internally the high-isolation low loss switching inside connection.

High-isolation low loss switching: high-isolation low loss switching is that control input or output analog signal enter or send Emulation bus out is used to connect sub-miniature A connector and transmission line analog signal.

T connector: T connector is a part of transmission line analog signal as connector, for by the low damage of high-isolation Consumption switch is connected to transmission line analog signal.

Transmission line analog signal: transmission line analog signal is the channel of transmission of analogue signal, has two, is used for transmission by height The analog signal of isolation low loss switching access, transmission line analog signal are made by half steel cable.As shown in figure 3, high isolation Degree low loss switching is divided into analog signal input control switch and two kinds of analog signal output control switch；Each high-isolation is low There are two connectivity ports for loss switch, connect respectively with analog signal bus A, analog signal bus B；Each high-isolation is low There are four switch contacts in loss switch, and wherein every two contact, which is serially connected, constitutes a signal paths, two signal paths It is separately connected analog signal bus A, analog signal bus B；The two signal paths connection of analog signal input control switch is same One sub-miniature A connector input terminal, two signal paths of output control switch are separately connected respective sub-miniature A connector output end.Thus may be used See, the microwave switch module that high-isolation low loss switching is driven by electricity by four is constituted, and two are used in a signal paths A switch module series connection, improves and switchs isolated isolation；It is designed using two signal paths, improves the flexibility used.

Control module: control module is the controller for controlling whole device work, to realize process control or manually Control receives control command by communication interface when process control, and passes through data/address bus control high-isolation low loss switching On-off.

Data/address bus: the order and data of control module are used for transmission.

Interface module: for whole device and external communication.

The application method and working principle of the utility model: measured analog signal and measuring device are separately connected On corresponding sub-miniature A connector end, measured signal is selected according to requiring to connect corresponding high-isolation low loss switching, makes to be measured Analog signal introduce transmission line analog signal, according to measurement request, the high-isolation low-loss for connecting corresponding measuring device is opened It closes, measured signal is accessed the input terminal of corresponding measuring instrument.

Although above having made detailed description to the utility model with generality explanation and specific embodiment, On the basis of the utility model, it can be made some modifications or improvements, this is apparent to those skilled in the art 's.Therefore, these modifications or improvements on the basis of without departing from the spirit of the present invention, belong to the utility model and want Seek the range of protection.

Claims (7)

1. a kind of high-isolation analog signal bus, it is characterised in that: including transmission line analog signal, sub-miniature A connector, data/address bus And for the interface module with external communication；The transmission line analog signal be two, every transmission line analog signal with High-isolation low loss switching is connected；The high-isolation low loss switching is inputted analog signal by being connected with sub-miniature A connector Or output；Each high-isolation low loss switching is connected with data/address bus, connects between the data/address bus and interface module There is control module.

2. high-isolation analog signal bus according to claim 1, it is characterised in that: there are two types of connect the sub-miniature A connector It connects, a kind of input terminal as analog signal is connected with the tested analog signal in outside, another output end as analog signal It is connected with measuring device.

3. high-isolation analog signal bus according to claim 2, it is characterised in that: each high-isolation low-loss is opened Guan Jun there are two connectivity port, respectively in two analog signal bus wherein one be connected.

4. high-isolation analog signal bus according to claim 3, it is characterised in that: each high-isolation low-loss is opened There are four switch contacts inside the Pass, wherein every two contact, which is serially connected, constitutes a signal paths, and two signal paths connect respectively Meet wherein one in two analog signal bus.

5. high-isolation analog signal bus according to claim 4, it is characterised in that: the high-isolation low-loss is opened Pass is divided into analog signal input control switch and two kinds of analog signal output control switch, the analog signal input control switch It is connected with the sub-miniature A connector as input terminal, the analog signal output control switch is connected with the sub-miniature A connector as output end.

6. high-isolation analog signal bus according to claim 1-5, it is characterised in that: the analog signal Transmission line is made by half steel cable.

7. high-isolation analog signal bus according to claim 1-5, it is characterised in that: each high-isolation The both ends of low loss switching pass through a T connector respectively and access on transmission line analog signal.