CN205829654U - Power equipment communication test instrument - Google Patents

Abstract

The utility model provides a power equipment communication tester, which includes an MCU controller, an RS485 interface test circuit, an RS232 interface test circuit, an infrared interface test circuit, a GPRS interface test circuit, a WIFI interface test circuit and a Bluetooth interface test circuit. The RS485 interface test circuit includes an RS485 test connector, an RS485 communication module and an RS485 signal sampling circuit. The MCU controller sends RS485 test data to the RS485 communication module, and the RS485 communication module sends return data to the MCU controller. The RS485 test connector is electrically connected to the RS485 communication module through the first switch element. The RS485 signal sampling circuit includes a sampling path and a first switch control circuit, and the sampling path and the first switch control circuit are respectively electrically connected to the first switch element. The first switch control circuit receives the switch control signal sent by the MCU controller, and the first switch control circuit controls the first switch element to turn on or off the connection between the sampling channel and the RS485 test connector according to the switch control signal.

Description

Power Equipment Communication Tester

technical field

The utility model relates to the field of equipment communication detection instruments, in particular to a power equipment communication tester used in the test of power equipment communication interfaces.

Background technique

With the development of the smart grid, power metering equipment has developed from the original simple electric energy meter to the present electric energy meter with diversified functions and various terminals, among which the terminals include load control terminals, distribution transformer terminals, concentrators, acquisition device, factory station terminal, etc. These metering devices are equipped with various communication interfaces. If the power operation and maintenance personnel encounter communication failures on site, they need to detect and troubleshoot the communication interfaces. If there is no special detection equipment to detect communication interfaces, it will give On-site work caused some confusion.

In addition, due to the diversity of communication interfaces of field devices, operation and maintenance personnel often need to carry a variety of communication interface detection instruments, which will bring unnecessary trouble to operation and maintenance personnel.

Contents of the invention

The purpose of this utility model is to provide a portable device, which can be easily carried to the site for detection, to troubleshoot the communication faults of the field devices, and to assist in the rapid realization of on-site operation and maintenance. It is a power equipment communication tester that supports multiple communication interface tests at the same time.

In order to achieve the above object, the power equipment communication tester provided by the utility model includes a MCU controller, an RS485 interface test circuit, an RS232 interface test circuit, an infrared interface test circuit, a GPRS interface test circuit, a WIFI interface test circuit and a Bluetooth interface test circuit, The MCU controller is electrically connected with the RS485 interface test circuit, the RS232 interface test circuit, the infrared interface test circuit, the GPRS interface test circuit, the WIFI interface test circuit and the Bluetooth interface test circuit respectively. The RS485 interface test circuit includes an RS485 test connector, an RS485 communication module and an RS485 signal sampling circuit. The MCU controller sends RS485 test data to the RS485 communication module, and the RS485 communication module sends return data to the MCU controller. The RS485 test connector is electrically connected to the RS485 communication module through the first switch element. The RS485 signal sampling circuit includes a sampling path and a first switch control circuit, and the sampling path and the first switch control circuit are respectively electrically connected to the first switch element. The first switch control circuit receives the switch control signal sent by the MCU controller, and the first switch control circuit controls the first switch element to turn on or off the connection between the sampling channel and the RS485 test connector according to the switch control signal.

It can be seen from the above scheme that the RS485 interface test circuit set by the utility model power equipment communication tester obtains the communication data between the RS485 communication module and the RS485 test connector by using the RS485 signal sampling circuit, and transmits it to the MCU controller for processing, and Determine whether the tested RS485 communication interface is faulty. Multiple types of communication interface test circuits are set on the same device, which is convenient for staff to carry and can cope with different communication interfaces.

In one solution, the first switch control circuit includes a second switch element, and the second switch element is electrically connected to the MCU controller, the first switch element and the power supply respectively.

It can be seen that since the operation of the first switch element needs to provide an operating power supply, the second switch element is provided in the first switch control circuit to control the supply and cut-off of the operating power, so as to achieve the purpose of controlling the first switch.

In another solution, the sampling path includes a sampling resistor, and the sampling resistor acquires return data from the RS485 test connector and sends the return data to the MCU controller.

It can be seen that the use of the sampling resistor makes the return data obtained by the sampling channel more accurate, thereby making the test result of the tester more accurate.

In a further solution, the RS232 interface test circuit includes an RS232 test connector, an RS232 communication module and an RS232 signal sampling circuit, and the RS232 signal sampling circuit collects RS232 test data returned by the RS232 test connector to the RS232 communication module.

It can be seen that the RS232 signal sampling circuit is used to obtain the data returned by the RS232 test connector to the RS232 communication module, and then it can be judged whether the detected RS232 interface is damaged.

In a further solution, the infrared interface testing circuit includes an infrared communication module and an infrared signal sampling circuit, and the infrared signal sampling circuit collects infrared test data returned from the tested infrared interface to the infrared communication module.

It can be seen that the infrared signal sampling circuit is used to obtain the data returned by the infrared test connector to the infrared communication module, and then it can be judged whether the infrared interface under test is damaged.

In a further solution, the GPRS interface test circuit includes a GPRS communication module and a GPRS signal sampling circuit, and the GPRS signal sampling circuit collects GPRS test data returned by the tested GPRS interface to the GPRS communication module.

It can be seen from the above solution that the GPRS signal sampling circuit is used to obtain the data returned by the GPRS interface under test to the GPRS communication module, and then it can be judged whether the GPRS interface under test is damaged.

In a further solution, the WIFI interface test circuit includes a WIFI communication module and a WIFI signal sampling circuit, and the WIFI signal sampling circuit collects WIFI test data returned from the tested WIFI interface to the WIFI communication module.

It can be seen that the WIFI signal sampling circuit is used to obtain the data returned by the WIFI interface under test to the WIFI communication module, and then it can be judged whether the WIFI interface under test is damaged.

In a further solution, the Bluetooth interface test circuit includes a Bluetooth communication module and a Bluetooth signal sampling circuit, and the Bluetooth signal sampling circuit collects the Bluetooth test data returned by the Bluetooth interface under test to the Bluetooth communication module.

It can be seen that the data returned by the Bluetooth interface under test to the Bluetooth communication module is obtained by using the Bluetooth signal sampling circuit, and then it can be judged whether the Bluetooth interface under test is damaged.

Description of drawings

Fig. 1 is a schematic block diagram of the circuit of an embodiment of the communication tester for electric equipment of the present invention.

Fig. 2 is a schematic circuit diagram of the RS485 interface test circuit in the embodiment of the electric equipment communication tester of the present invention.

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

detailed description

As shown in Figure 1, the power equipment communication tester of the present utility model comprises MCU controller 1, RS485 interface test circuit 2, RS232 interface test circuit 3, infrared interface test circuit 4, GPRS interface test circuit 5, WIFI interface test circuit 6 And Bluetooth interface test circuit 7, MCU controller 1 is electrically connected with RS485 interface test circuit 2, RS232 interface test circuit 3, infrared interface test circuit 4, GPRS interface test circuit 5, WIFI interface test circuit 6 and Bluetooth interface test circuit 7 . In addition, the power equipment communication tester also includes a host computer interface 8, and the MCU controller 1 connects the RS485 interface test circuit 2, the RS232 interface test circuit 3, the infrared interface test circuit 4, the GPRS interface test circuit 5, and the WIFI interface through the host computer interface 8. The data obtained by the test circuit 6 and the Bluetooth interface test circuit 7 are sent to a host computer (such as a mobile phone, a computer, etc.) for users to view.

Wherein, the RS232 interface test circuit 3 includes an RS232 test connector 33, an RS232 communication module 31 and an RS232 signal sampling circuit 32, and the RS232 signal sampling circuit 32 collects RS232 test data returned by the RS232 test connector 33 to the RS232 communication module 31. The infrared interface testing circuit 4 includes an infrared communication module 41 and an infrared signal sampling circuit 42 , the infrared signal sampling circuit 42 collects infrared test data returned to the infrared communication module 41 by a tested infrared interface (not shown). The GPRS interface test circuit 5 includes a GPRS communication module 51 and a GPRS signal sampling circuit 52 , and the GPRS signal sampling circuit 52 collects GPRS test data returned to the GPRS communication module 51 by a tested GPRS interface (not shown). The WIFI interface test circuit 6 includes a WIFI communication module 61 and a WIFI signal sampling circuit 62 , the WIFI signal sampling circuit collects 62 WIFI test data returned to the WIFI communication module 61 by the tested WIFI interface (not shown). The Bluetooth interface test circuit 7 includes a Bluetooth communication module 71 and a Bluetooth signal sampling circuit 72 , and the Bluetooth signal sampling circuit 72 collects Bluetooth test data returned to the Bluetooth communication module 71 by the Bluetooth interface under test (not shown).

In addition, referring to Fig. 2, RS485 interface test circuit 2 comprises RS485 test joint 23, RS485 communication module 21 and RS485 signal sampling circuit 22, MCU controller 1 sends RS485 test data to RS485 communication module 21, RS485 communication module 21 sends RS485 test data to MCU controller 1 transport return data. The RS485 test connector 23 is electrically connected to the RS485 communication module 21 through the first switch element J1, and the first switch element J1 includes a relay switch in this embodiment. The RS485 signal sampling circuit 22 includes a sampling path 221 and a first switch control circuit 222, and the sampling path 221 and the first switch control circuit 222 are respectively electrically connected to the first switch element J1. The first switch control circuit 222 receives the switch control signal sent by the MCU controller 1, and the first switch control circuit 222 controls the first switch element J1 to turn on or off the connection between the sampling path 221 and the RS485 test connector 23 according to the switch control signal.

Wherein, the first switch control circuit 222 includes a second switch element, the second switch element in this embodiment includes a PNP transistor Q1, the base of the PNP transistor Q1 is electrically connected to the MCU controller 1 through a resistor R4, and the emitter of the PNP transistor Q1 The pole is connected to the power supply VCC, the collector of the PNP transistor Q1 is electrically connected to the first switching element J1, and at the same time, the path connecting the resistor R4 to the MCU controller 1 is electrically connected to the power supply VCC through the resistor R5. The sampling path 221 includes a sampling resistor, and the sampling resistor acquires return data from the RS485 test connector 23 and sends the return data to the MCU controller 1 . The sampling resistor includes a resistor R1, a resistor R2 and a resistor R3, the resistor R1 and the resistor R2 are connected in series, one end of the resistor R3 is electrically connected to the path connecting the resistor R1 and the resistor R2, and the other end of the resistor R3 is grounded to GND.

When the power equipment communication tester of the present utility model is working, the MCU controller 1 sends different test signals according to the different communication interfaces to be tested, and collects the information returned by the communication interfaces to be tested through the sampling circuits of each communication interface, and finally judges Find out whether there is any abnormality in the communication interface under test. In order to better understand the utility model, the working principle of the RS485 interface test circuit 2 is described in detail below.

When testing the RS485 communication interface, the MCU controller 1 sends RS485 test data to the RS485 communication module 21 , and the RS485 communication module 21 transmits the RS485 test data to the RS485 test connector 23 after receiving the RS485 test data. At this time, the relay switch J1, that is, the first switching element of this embodiment, makes the RS485 communication module 21 and the RS485 test connector 23 in the on state, the RS485 test connector 23 and the RS485 signal sampling circuit 22 in the cut-off state, and the RS485 test data passes through the RS485 The test joint 23 transmits to the RS485 communication interface under test. The RS485 communication interface under test sends return data to the RS485 communication module 21 according to the test data. When the RS485 communication interface under test sends back data, the MCU controller 1 sends a switch control signal to the PNP transistor Q1, that is, the second switch element of this embodiment, so that the first switch control circuit 222 is turned on, and then connected to the PNP transistor Q1. The emitter is connected to the power supply VCC to supply power to the relay switch J1, so that the relay switch J1 cuts off the path between the RS485 communication module 21 and the RS485 test connector 23, and conducts the path between the RS485 test connector 23 and the RS485 signal sampling circuit 22. The RS485 signal sampling circuit 22 collects the returned data and sends it to the MCU controller 1, and the MCU controller 1 judges whether the tested RS485 communication interface is normal according to the returned data. The MCU controller 1 finally returns the judgment data to the host computer for the user to view.

In addition, the working principle of the RS232 interface test circuit 3, the infrared interface test circuit 4, the GPRS interface test circuit 5, the WIFI interface test circuit 6 and the Bluetooth interface test circuit 7 is similar to that of the RS485 interface test circuit 2. The respective communication modules and sampling circuits will not be described in detail here.

It can be seen from the above description that the utility model power equipment communication tester sets various types of communication interface test circuits on the same device, which is convenient for staff to carry and can cope with different communication interfaces. In addition, the set RS485 interface test circuit 2 obtains the communication data between the RS485 communication module 21 and the RS485 test connector 23 by using the RS485 signal sampling circuit 22, and transmits it to the MCU controller 1 for processing, and judges the RS485 communication data tested. Whether the interface is faulty.

It should be noted that the above are only preferred embodiments of the utility model, but the design concept of the utility model is not limited thereto, and any insubstantial modifications made to the utility model by using this concept also fall into the scope of the utility model. within the scope of protection.

Claims (10)

1. power equipment communication test instrument, including MCU controller, RS485 interface test circuitry, RS232 interface test circuitry, red External tapping test circuit, GPRS interface test circuitry, WIFI interface test circuit and blue tooth interface test circuit, described MCU is controlled Device processed tests circuit, institute with described RS485 interface test circuitry, described RS232 interface test circuitry, described infrared interface respectively State GPRS interface test circuitry, described WIFI interface test circuit and the test circuit electrical connection of described blue tooth interface, its feature It is:

Described RS485 interface test circuitry includes RS485 test splice, RS485 communication module and RS485 signal sampling electricity Road, described MCU controller sends RS485 to described RS485 communication module and tests data, and described RS485 communication module is to described The conveying of MCU controller returns data；

Described RS485 test splice is electrically connected with described RS485 communication module by the first switch element；

Described RS485 signal sample circuit includes sample path and the first ON-OFF control circuit, described sampling path and described the One ON-OFF control circuit electrically connects with described first switch element respectively；

Described first ON-OFF control circuit receives the switch controlling signal that described MCU controller is sent, described first switch control Circuit processed controls described first switching elements conductive according to described switch controlling signal or ends described sampling path with described The connection of RS485 test splice.

Power equipment communication test instrument the most according to claim 1, it is characterised in that: described first ON-OFF control circuit bag Including second switch element, described second switch element is electric with described MCU controller, described first switch element and power supply respectively Connect.

Power equipment communication test instrument the most according to claim 2, it is characterised in that: described sampling path includes sampling electricity Resistance, described sampling resistor obtains described return data from described RS485 test splice and described return data is sent to described MCU controller.

Power equipment communication test instrument the most according to claim 3, it is characterised in that:

Described first switch element includes relay switch.

Power equipment communication test instrument the most according to claim 4, it is characterised in that:

Described second switch element includes triode transistor.

6. according to the power equipment communication test instrument described in any one of claim 1 to 5, it is characterised in that:

Described RS232 interface test circuitry includes RS232 test splice, RS232 communication module and RS232 signal sampling electricity Road, described RS232 signal sample circuit gathers the RS232 survey that described RS232 test splice returns to described RS232 communication module Examination data.

7. according to the power equipment communication test instrument described in any one of claim 1 to 5, it is characterised in that:

Described infrared interface test circuit includes infrared communication module and infrared signal sample circuit, and described infrared signal is sampled Circuit gathers the infrared test data that tested infrared interface returns to described infrared communication module.

8. according to the power equipment communication test instrument described in any one of claim 1 to 5, it is characterised in that:

Described GPRS interface test circuitry includes GPRS communication module and GPRS signal sample circuit, described GPRS signal sampling Circuit gathers the GPRS test data that tested GPRS interface returns to described GPRS communication module.

9. according to the power equipment communication test instrument described in any one of claim 1 to 5, it is characterised in that:

Described WIFI interface test circuit includes WIFI communication module and WIFI signal sample circuit, and described WIFI signal is sampled Circuit gathers the WIFI test data that tested WIFI interface returns to described WIFI communication module.

10. according to the power equipment communication test instrument described in any one of claim 1 to 5, it is characterised in that:

Described blue tooth interface test circuit includes bluetooth communication and Bluetooth signal sample circuit, and described Bluetooth signal is sampled Circuit gathers the bluetooth test data that tested blue tooth interface returns to described bluetooth communication.