CN202533455U

CN202533455U - Communication extended circuit

Info

Publication number: CN202533455U
Application number: CN2012201970764U
Authority: CN
Inventors: 黄建科; 邓振东
Original assignee: Huizhou Blueway Electronic Co Ltd
Current assignee: Huizhou Blueway Electronic Co Ltd
Priority date: 2012-05-04
Filing date: 2012-05-04
Publication date: 2012-11-14
Anticipated expiration: 2022-05-04

Abstract

The utility model discloses a communication extended circuit. The circuit comprises the following components of: a master control single chip microcomputer circuit, wherein the uplink of the master control single chip microcomputer circuit communicates with a computer through an RS232 serial communication circuit so as to receive a control command and transmit testing data and the downlink of the master control single chip microcomputer circuit is connected with slave control single chip microcomputers through an I2C data bus; and a plurality of slave control single chip microcomputer circuits which are connected with a testing plate of a testing device, acquire the testing data of the testing device and upload the testing data to a master control single chip microcomputer. The RS232 serial communication circuit is connected to the computer through a photoelectric coupled isolating circuit. With only one serial port of the computer required, the communication extended circuit of the utility model can control operation of multiple testing device channels with the multiple channels being tested simultaneously, thereby greatly improving testing efficiency; the communication extended circuit only adopts one serial port to perform control with the photoelectric coupled isolating circuit installed additionally, so interference between devices can be effectively avoided, thereby improving stability of a testing system; and in addition, the computer is controlled through one serial port such that the work load of the computer can be reduced, and programming amount of software can be reduced.

Description

A kind of communication expanded circuit

Technical field

The utility model relates to a kind of communication expanded circuit, refers in particular to the communication expanded circuit that uses on the equipment of the usefulness that is used for battery management system is detected or calibrates.

Background technology

The battery management system product is in making testing process; Performance of products detects and calibration check test equipment supports more than 20 passage to test simultaneously usually, as adopting more than 20 serial ports control test of computing machine, makes computing machine insert 20 serial ports; To bring very large load to computing machine; Computing machine is prone to faults such as generation speed is slow, deadlock, thereby influences the operate as normal of testing apparatus, also makes software programming complicated and adopt 20 serial ports to control.Especially be directed against the test of the battery management system product of carried charge management function, this kind properties of product test event is many, and test data is also many, and this problem is particularly outstanding.

Summary of the invention

The utility model provides a kind of communication expanded circuit of battery management system performance detection apparatus use to the problems referred to above.

The technical scheme of the utility model is following: a kind of communication expanded circuit comprises:

The main control singlechip circuit, its up and computing machine communication reception control command and transmitting test data, the descending I2C data bus that passes through connects from the control single-chip microcomputer;

Serial communication circuit is used for main control singlechip and computing machine communication;

A plurality of from the control single chip circuit, be connected the test data of capture and detection apparatus, and be uploaded to main control singlechip with the test board of checkout equipment.

Concrete, said serial communication circuit is the RS232 serial communication circuit.

Concrete, said RS232 serial communication circuit connects computing machine through optical coupling isolation circuit.

Concrete, said a plurality of I2C data bus mouths that are parallel to main control singlechip from the control single chip circuit.

Compared with prior art, the utlity model has following beneficial effect:

(1) only need a serial ports of computing machine with regard to a plurality of testing apparatus passages work of may command in the utility model, and a plurality of passage can test simultaneously, thereby improve testing efficiency greatly;

(2) because the utility model only adopts a serial ports control, optical coupling isolation circuit is set in addition, effectively avoids doing sorrow between the apparatus, improve test macro stability;

(3) computing machine is loaded by serial ports control can a minimizing computer operation in addition, and reduces software programming.

Figure of description

The said communication expanded circuit of accompanying drawing 1 the utility model theory of constitution schematic block diagram;

Accompanying drawing 2 the utility model communication buffer circuit part principle schematic;

Accompanying drawing 3 the utility model main control singlechip circuit part principle schematic.

Embodiment

In order to let those skilled in the art understand the technical scheme of the utility model better, the utility model is done further to set forth below in conjunction with accompanying drawing.

As shown in Figure 1, the said communication expanded circuit of the utility model comprises main control singlechip circuit and a plurality of from control single chip circuit and serial communication circuit.Wherein, the up and computing machine communication of main control singlechip receives control command and transmitting test data, and the descending I2C data bus that passes through connects from the control single-chip microcomputer; Serial communication circuit is used for main control singlechip and computing machine communication; A plurality of from the control single chip circuit, be connected the test data of capture and detection apparatus, and be uploaded to main control singlechip with the test board of checkout equipment.

In Fig. 2,3 illustrated embodiment circuit; Main control singlechip U105 circuit is up through RS232 serial communication circuit (U101) and computing machine communication; Receive control command and transmitting test data, the descending I2C data bus SDA of passing through, SCL (25 pin, 26 pin) connect from the control single-chip microcomputer.For fear of interference, improve the stability of test macro, between RS232 serial communication circuit and computing machine, adopt optical coupling isolation circuit (U103, U104) to be connected.Among the embodiment; A plurality of I2C data bus mouths (25 pin, 26 pin) that are parallel to main control singlechip from the control single chip circuit; The main control singlechip circuit also corresponding respectively each from the control single chip circuit two channel selecting interfaces are set, like the CON1 among Fig. 2～20, CLK-1～CLK-20.Be connected with the test board of checkout equipment through splicing interface from the control single chip circuit, the test board of checkout equipment connects product to be measured.

Need to prove; Under the situation that does not deviate from the utility model spirit and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these changes and distortion all should belong to the protection domain of the appended claim of the utility model.

Claims

1. a communication expanded circuit is characterized in that, comprising:

2. communication expanded circuit according to claim 1 is characterized in that: said serial communication circuit is the RS232 serial communication circuit.

3. communication expanded circuit according to claim 2 is characterized in that, said RS232 serial communication circuit connects computing machine through optical coupling isolation circuit.

4. communication expanded circuit according to claim 1 is characterized in that: said a plurality of I2C data bus mouths that are parallel to main control singlechip from the control single chip circuit.