CN221406465U

CN221406465U - Test management circuit and multi-channel serial port tester

Info

Publication number: CN221406465U
Application number: CN202323593361.5U
Authority: CN
Inventors: 李超
Original assignee: Wuxi Chuangxinhang Electronic Technology Co ltd
Current assignee: Wuxi Chuangxinhang Electronic Technology Co ltd
Priority date: 2023-12-26
Filing date: 2023-12-26
Publication date: 2024-07-23
Anticipated expiration: 2033-12-26

Abstract

The utility model relates to the technical field of electronic testing, in particular to a test management circuit and a multi-channel serial port tester. The test management circuit includes: the system comprises a main control module, a transmission management module and a test module. The main control module is connected with the first end of the transmission management module, a plurality of external devices are connected with the second end of the transmission management module through corresponding serial ports, and the third end of the transmission management module is connected with the test module; the main control module is used for generating a driving signal according to the driving instruction and transmitting the driving signal to the transmission management module; the transmission management module is used for conducting a loop between the corresponding serial port and the testing module according to the driving signal to perform the testing function of the external equipment. The transmission management module is arranged between the access serial port of the external equipment and the test module, and the connection loop of the corresponding serial port is conducted by receiving the control instruction of the main control module, so that signal interference generated during simultaneous test of a plurality of external equipment is prevented, and the problem of damage to electronic devices possibly caused by repeated plugging and unplugging of the serial ports is avoided.

Description

Test management circuit and multi-channel serial port tester

Technical Field

The utility model relates to the technical field of electronic testing, in particular to a test management circuit and a multi-channel serial port tester.

Background

The multi-channel serial port tester is serial port communication equipment for testing and monitoring, and can be used for carrying out data acquisition, analysis and diagnosis on serial port communication. The method can be suitable for various standard serial port communication protocols such as RS-232, RS-485 and RS-422, and has wide application in the fields of electronic system testing, power system monitoring, industrial automation, communication equipment testing and the like.

When testing, the situation that multiple serial ports work simultaneously often occurs, and at this time, multiple devices to be tested are simultaneously connected to multiple serial port testers. In the process of data acquisition, some serial transmission signals have similar frequencies or electromagnetic disturbance occurs so as to cause mutual interference among a plurality of serial lines. The serial port line is required to be manually and repeatedly pulled out and plugged in to realize test work, so that the operation is complex, and the service life of equipment is easily influenced by surge impact.

The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present utility model and is not intended to represent an admission that the foregoing is prior art.

Disclosure of utility model

The utility model mainly aims to provide a test management circuit and a multi-channel serial port tester, and aims to solve the technical problem of a plurality of serial port lines in the prior art.

To achieve the above object, the present utility model provides a test management circuit including: the system comprises a main control module, a transmission management module and a test module;

The main control module is connected with the first end of the transmission management module, a plurality of external devices are connected into the second end of the transmission management module through corresponding serial ports, and the third end of the transmission management module is connected with the test module;

The main control module is used for generating a driving signal according to the driving instruction and transmitting the driving signal to the transmission management module;

And the transmission management module is used for conducting a loop between the corresponding serial port and the test module according to the driving signal to perform the test function of external equipment.

Optionally, the transmission management module includes: the number of the switch units is the same as that of the serial ports;

the input end of the switch unit is connected with the corresponding serial port, the output end of the switch unit is connected with the test module, and the control end of the switch unit is connected with the main control module;

and the switch unit is used for conducting a loop between the corresponding serial port and the test module to perform the test function of external equipment when the received driving signal is at a high level.

Optionally, the switching unit includes: first to fourth resistors, a first switching tube and a second switching tube;

The input end of the first switching tube is connected with the corresponding serial port and the first end of the first resistor at the same time, the output end of the first switching tube is connected with the test module, the control end of the first switching tube is connected with the second end of the first resistor and the first end of the second resistor at the same time, the second end of the second resistor is connected with the input end of the second switching tube, the control end of the second switching tube is connected with the first end of the third resistor and the first end of the fourth resistor at the same time, the second end of the third resistor is connected with the main control module, and the output end of the second switching tube is connected with the second end of the fourth resistor and grounded.

Optionally, the switching unit further includes: a first diode and a second diode;

The positive pole of first diode with the output of first switch tube is connected, the negative pole of first diode with test module is connected, the positive pole of second diode with main control module is connected, the negative pole of second diode with the second end of third resistance is connected.

Optionally, the transmission management module further includes: the number of the indication units is the same as that of the switch units;

Each indicating unit is arranged between the main control module and the control end of each switch unit;

the indicating unit is used for indicating the loop conduction state between the corresponding serial port and the test module.

Optionally, the indication unit includes: a fifth resistor and an indicator light;

The first end of the fifth resistor is connected with the second end of the third resistor, the second end of the fifth resistor is connected with the first end of the indicator lamp, and the second end of the indicator lamp is grounded.

Optionally, the test management circuit further comprises: a DC conversion module;

One end of the direct current conversion module is connected with the main control module, and the other end of the direct current conversion module is connected with the transmission management module;

The direct current conversion module is used for converting the voltage of the main control module into the conduction voltage of the switching tube in the transmission management module and transmitting the conduction voltage to the transmission management module.

Optionally, the dc conversion module includes: the voltage stabilizing circuit comprises a sixth resistor, a seventh resistor, a first capacitor, a second capacitor and a voltage stabilizing chip;

One end of the first capacitor is connected with the main control module and the input end of the voltage stabilizing chip at the same time, the other end of the first capacitor is grounded, the control end of the voltage stabilizing chip is connected with one end of the sixth resistor and one end of the seventh resistor at the same time, the other end of the sixth resistor is connected with the output end of the voltage stabilizing chip, one end of the second capacitor and the transmission management module at the same time, and the other end of the seventh resistor is connected with the other end of the second capacitor and grounded.

In addition, in order to achieve the above purpose, the utility model also provides a multi-channel serial port tester, which comprises the test management circuit.

Optionally, the multi-channel serial port tester further includes: a solid state disk and a display screen;

The solid state disk and the display screen are connected with a test module in the test management circuit;

the solid state disk is used for storing test data of the test module;

And the display screen is used for carrying out visual processing on the test data of the test module.

The technical scheme of the utility model provides a test management circuit and a multi-channel serial port tester. The test management circuit includes: the system comprises a main control module, a transmission management module and a test module; the main control module is connected with the first end of the transmission management module, a plurality of external devices are connected into the second end of the transmission management module through corresponding serial ports, and the third end of the transmission management module is connected with the test module; the main control module is used for generating a driving signal according to the driving instruction and transmitting the driving signal to the transmission management module; and the transmission management module is used for conducting a loop between the corresponding serial port and the test module according to the driving signal to perform the test function of external equipment. The transmission management module is arranged between the access serial port of the external equipment and the test module, and the control instruction of the main control module is received to conduct the serial port connection loop with the test function, so that signal interference generated during simultaneous test of a plurality of external equipment is prevented, and the problem of damage to the electronic device possibly caused by repeated plugging of the serial port is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a functional block diagram of a first embodiment of a test management circuit according to the present utility model;

FIG. 2 is a circuit diagram of a switch unit according to a first embodiment of the test management circuit of the present utility model;

FIG. 3 is a circuit diagram of a second embodiment of the test management circuit of the present utility model;

FIG. 4 is a circuit diagram of a DC conversion module in a second embodiment of the test management circuit according to the present utility model;

Fig. 5 is a schematic structural diagram of a multi-channel serial port tester according to the present utility model.

Reference numerals illustrate:

Reference numerals	Name of the name	Reference numerals	Name of the name
				R1～R7	First to seventh resistors	20	Transmission management module
C1、C2	First and second capacitors	201	Switch unit
				Q1、Q2	First and second switching tubes	202	Indication unit
D1、D2	First and second diodes	30	Test module
				L1	Indicating lamp	40	DC conversion module
U1	Voltage stabilizing chip	50	Solid state disk
				10	Main control module	60	Display screen

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered that the combination does not exist and is not within the scope of protection claimed by the present utility model.

Referring to fig. 1, fig. 1 is a functional block diagram of a first embodiment of a test management circuit according to the present utility model. The present utility model proposes a first embodiment of a test management circuit.

In this embodiment, the test management circuit includes: the device comprises a main control module 10, a transmission management module 20 and a test module 30; the main control module 10 is connected with a first end of the transmission management module 20, a plurality of external devices are connected to a second end of the transmission management module 20 through corresponding serial ports, and a third end of the transmission management module 20 is connected with the test module 30.

It should be noted that the main control module 10 may be a central processing unit (Central Processing Unit, CPU) having digital processing and operation functions. Various functionalities can be realized by compiling instructions, and the functions of management and control are provided. The main control module 10 may also be configured with a memory module for storing preset instructions.

In a specific implementation, the main control module 10 may generate a driving signal according to a driving instruction, and transmit the driving signal to the transmission management module 20; the transmission management module 20 may conduct a loop between the corresponding serial port and the test module 30 according to the driving signal to perform a test function of the external device.

The transmission management module 20 may be an electronic device with a switching function, and may be configured to conduct an external device that needs to perform a collection test function according to a driving signal transmitted by the main control module 10 through a loop between a serial port and the test module 30. The test module 30 may be a CPU with signal acquisition and operation processing functions, and may be implemented by performing instruction configuration with two different CPUs in the main control module 10, or may be implemented by performing two different instruction configurations on the same CPU. The test module 30 may transmit a test signal to an external device through a serial port to realize a test function for the external device, and the test module 30 may collect a data signal transmitted by the external device accessed through the serial port, and analyze and calculate the external device according to the collected data signal.

It should be noted that the driving instruction may be an instruction issued by the user to the main control module 10 and including flag information such as a serial number or a feature value of the external device to be detected. The main control module 10 may determine a serial loop of the external device to be detected according to the driving instruction, and generate the driving signal. The driving signal may be a driving electrical signal generated by the main control module 10 after analyzing the driving command and controlling the serial loop of the external device to be detected to be turned on. The transmission management module 20 may control the on of the switching device of the internal corresponding serial port loop according to the driving electrical signal, so as to implement the sampling function or the test signal output function of the test module 30 for the information of the external device to be detected.

Referring to fig. 2, fig. 2 is a circuit connection diagram of a switch unit in a first embodiment of the test management circuit according to the present utility model. The transmission management module 20 includes: the number of the switch units 201 is the same as that of the serial ports, the input ends of the switch units 201 are connected with the corresponding serial ports, the output ends of the switch units 201 are connected with the test module 30, and the control ends of the switch units 201 are connected with the main control module 10.

The switching unit 201 may be a switching circuit formed by switching transistors (including a triode and a field effect transistor), and one switching unit is disposed between each serial port and the test module 30 to perform switching control on a loop between the serial port and the test module 30. The number of switching units 201 is thus the same as the number of serial ports. The specific number may be set according to the number of serial ports of the tester in actual situations, which is not limited in this embodiment. The serial port model can comprise a plurality of standard serial port communication protocols such as RS-232, RS-485, RS-422 and the like.

It should be understood that, taking the tester as an example, the tester includes four serial ports, the four serial ports are respectively connected with corresponding external devices, and four switch units are correspondingly arranged. The four switch units are sequentially connected with the four output ports of the main control module, and signals output by the four output ports of the main control module in an initial state are 0000. If the test module needs to test the external equipment connected with the second serial port at this time, a driving instruction is set to enable driving signals output by four output ports of the main control module to be 0100 respectively, at this time, only driving signals received by a switching unit corresponding to the second serial port are high-level signals, and a loop between the second serial port and the test module is correspondingly conducted to realize test work of the external equipment. Similarly, if the test module needs to test the external device connected to the third serial port at this time, a driving instruction is set so that driving signals output by four output ports of the main control module are respectively 0010. The test operation of the corresponding first serial port and fourth serial port can also be set in the same way, so that the driving signal output by the first output port or the fourth output port of the main control module is high level.

Further, the switching unit includes: first to fourth resistors, a first switching transistor Q1, and a second switching transistor Q2. The input end of the first switching tube Q1 is simultaneously connected with the corresponding serial port and the first end of the first resistor R1, the output end of the first switching tube Q1 is connected with the test module 20, the control end of the first switching tube Q1 is simultaneously connected with the second end of the first resistor R1 and the first end of the second resistor R2, the second end of the second resistor R2 is connected with the input end of the second switching tube Q2, the control end of the second switching tube Q2 is simultaneously connected with the first end of the third resistor R3 and the first end of the fourth resistor R4, the second end of the third resistor R3 is connected with the main control module 10, and the output end of the second switching tube Q2 is connected with the second end of the fourth resistor R4 and grounded.

It should be noted that, when the control end of the second switching tube Q2 receives that the driving signal of the main control module 10 is at a high level, the second switching tube Q2 is turned on, so that a potential difference is generated between the control end and the input end of the first switching tube Q1, and the first switching tube Q1 is turned on, thereby realizing loop conduction between the serial port of the external device to be detected and the test module 30. When the control end of the second switching tube Q2 receives the signal of the main control module 10 at a low level, the second switching tube Q2 is turned off, so that a loop between the control end and the input end of the first switching tube Q1 is turned off, no potential difference exists, and the first switching tube Q1 is turned off, thereby realizing the loop disconnection between the serial port of the external device and the test module 30 which are not required to be detected temporarily.

The embodiment provides a test management circuit. The test management circuit includes: the system comprises a main control module, a transmission management module and a test module; the main control module is connected with the first end of the transmission management module, a plurality of external devices are connected into the second end of the transmission management module through corresponding serial ports, and the third end of the transmission management module is connected with the test module; the main control module is used for generating a driving signal according to the driving instruction and transmitting the driving signal to the transmission management module; and the transmission management module is used for conducting a loop between the corresponding serial port and the test module according to the driving signal to perform the test function of external equipment. The transmission management module is arranged between the access serial port of the external equipment and the test module, and the control instruction of the main control module is received to conduct the serial port connection loop with the test function, so that signal interference generated during simultaneous test of a plurality of external equipment is prevented, and the problem of damage to the electronic device possibly caused by repeated plugging of the serial port is avoided.

Referring to fig. 3, fig. 3 is a circuit configuration diagram of a second embodiment of the test management circuit according to the present utility model. A second embodiment of the test management circuit of the present utility model is presented based on the first embodiment of the test management circuit described above.

In this embodiment, the switching unit 201 further includes: a first diode D1 and a second diode D2; the anode of the first diode D1 is connected to the output end of the first switching tube Q1, the cathode of the first diode D1 is connected to the test module 30, the anode of the second diode D2 is connected to the main control module 10, and the cathode of the second diode D2 is connected to the second end of the third resistor R3.

It should be noted that, the first diode D1 and the second diode D2 are both turned on when the forward voltage is greater than the PN junction threshold voltage, and turned off when the forward voltage is less than the PN junction threshold voltage, so as to achieve the unidirectional current conduction effect in the loop, and avoid the current reverse current flowing.

Further, the transmission management module 20 further includes: the same number of indication units 202 as the switch units; the indication unit 202 is disposed between the main control module and the control end of each of the switch units.

It should be noted that, the indication unit 202 is configured to indicate a transmission status of the driving signal generated by the main control module 10 to the switch unit 201, and perform a lighting indication when the main control module 10 generates a high-level driving model, and because the switch unit may conduct a loop between the corresponding serial port and the test module 30 when receiving the high-level driving signal, the indication unit may also be configured to indicate a loop conduction state between the corresponding serial port and the test module 30.

Further, the indicating unit 202 includes: a fifth resistor R5 and an indicator light L1; the first end of the fifth resistor R5 is connected with the second end of the third resistor R3, the second end of the fifth resistor R5 is connected with the first end of the indicator lamp L1, and the second end of the indicator lamp L1 is grounded.

When the signal generated by the main control module 10 is at the low level, the indicator light L1 is turned off, and the circuit between the serial port and the test module 30 is turned off. When the driving signal generated by the main control module 10 is at a high level, the indicator light L1 is turned on to indicate that the loop between the serial port and the test module 30 is in a conductive state.

Referring to fig. 4, fig. 4 is a circuit configuration diagram of a dc conversion module in a second embodiment of the test management circuit according to the present utility model. The test management circuit further includes: a DC conversion module 40; one end of the direct current conversion module 40 is connected with the main control module 10, and the other end is connected with the transmission management module 20; the dc conversion module is configured to convert the voltage of the main control module 30 into a turn-on voltage of a switching tube in the transmission management module 20, and transmit the turn-on voltage to the transmission management module 20.

When the first switching transistor Q1 and the second switching transistor Q2 are turned on and off, the control terminal needs to receive a voltage signal within a threshold range to switch. The voltage value of the driving signal should be higher than the lower limit of the threshold range so that the normal operation of the first switching tube Q1 and the second switching tube Q2 can be triggered, and the voltage value of the driving signal should be lower than the upper limit of the threshold range so as to avoid the switching tube being damaged due to the excessively high voltage value.

It should be appreciated that the dc conversion module 40 may be an electronic device having dc voltage conversion and voltage regulation capabilities. May include: the voltage stabilizing circuit comprises a sixth resistor R6, a seventh resistor R7, a first capacitor C1, a second capacitor C2 and a voltage stabilizing chip U1. One end of the first capacitor C1 is connected with the main control module 10 and the input end of the voltage stabilizing chip U1, the other end of the first capacitor C1 is grounded, the control end of the voltage stabilizing chip U1 is connected with one end of the sixth resistor R6 and one end of the seventh resistor R7, the other end of the sixth resistor R6 is connected with the output end of the voltage stabilizing chip U1, one end of the second capacitor C2 and the transmission management module 20, and the other end of the seventh resistor R7 is connected with the other end of the second capacitor C2 and grounded.

The voltage stabilizing chip U1 may be an LM317 three-terminal adjustable voltage stabilizer, and the output voltage may be adjusted by setting the sixth resistor R6 and the seventh resistor R7. The output voltage Vout of the LM317 chip satisfies the formula:

Vout＝1.25×(1+R7/R6)

In a specific implementation, the ratio of the sixth resistor R6 to the seventh resistor R7 may be adjusted so that the driving voltage is maintained within the threshold range of the switching tube. The first capacitor C1 and the second capacitor C2 may be filter voltages for filtering out high-frequency interference components in the power supply.

According to the embodiment, the indication unit is arranged, the indication lamps are used for indicating the loop states between the serial ports and the test modules, the corresponding indication lamps are turned on when the loop is conducted, and the turned-off indication lamps mark the turned-off loop. The direct-current conversion module is arranged to adjust the voltage value of the driving signal generated by the main control module to be within the threshold range of the switching tube in the transmission management module, so that the circuit structure is simple, the work is stable, and the problem that the electronic device is damaged possibly caused by repeated plugging of the serial port is further avoided.

In addition, the embodiment of the utility model also provides a multi-channel serial port tester, which comprises the test management circuit. Referring to fig. 5, fig. 5 is a schematic structural diagram of a multi-channel serial port tester according to the present utility model.

It should be noted that, the multi-channel serial port tester further includes: a solid state disk 50 and a display screen 60; the solid state disk 50 and the display screen 60 are both connected with the test module 30 in the test management circuit.

It should be understood that the CPU that constructs the test module 30 may extend various interfaces, such as: and the optical fiber interface card adopts a PCIE-2QFC board card to realize the data cache and transmission functions of the optical fiber signal interface. And the avionics FC card adopts a PCIe-FEA100 board card to realize the service simulation of the fiber bus node based on the FC-AE-ASM protocol. The CPU of the test module 30 may also be extended with other interfaces (including memory cards, video capture cards, time synchronization cards, etc.).

The solid state disk 50 may be used to store test data of the test module 30. NVME memory cards may be employed with higher random and sequential access capabilities.

The display screen can be used for carrying out visual processing on the test data of the test module. A 17 inch display may be used with a resolution of 1920 x 1080.

The multi-channel serial port tester adopts all the technical schemes of all the embodiments, so that the multi-channel serial port tester at least has all the beneficial effects brought by the technical schemes of the embodiments, and the multi-channel serial port tester is not described in detail herein.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. The utility model provides a test management circuit which characterized in that, test management circuit is applied to multichannel serial ports tester, includes: the system comprises a main control module, a transmission management module and a test module;

2. The test management circuit of claim 1, wherein the transmission management module comprises: the number of the switch units is the same as that of the serial ports;

3. The test management circuit of claim 2, wherein the switching unit comprises: first to fourth resistors, a first switching tube and a second switching tube;

4. The test management circuit of claim 3 wherein the switching unit further comprises: a first diode and a second diode;

5. The test management circuit of claim 4, wherein the transmission management module further comprises: the number of the indication units is the same as that of the switch units;

6. The test management circuit of claim 5 wherein the indication unit comprises: a fifth resistor and an indicator light;

7. The test management circuit of claim 3, wherein the test management circuit further comprises: a DC conversion module;

8. The test management circuit of claim 7 wherein the dc conversion module comprises: the voltage stabilizing circuit comprises a sixth resistor, a seventh resistor, a first capacitor, a second capacitor and a voltage stabilizing chip;

9. A multiple serial port tester, comprising the test management circuit of any one of claims 1 to 8.

10. The multi-channel serial port tester according to claim 9, wherein the multi-channel serial port tester further comprises: a solid state disk and a display screen;

the solid state disk is used for storing test data of the test module;