阅读说明：本技术 一种数字脉冲信号频率及占空比测量装置及系统 (Digital pulse signal frequency and duty ratio measuring device and system ) 是由 王江辉 于 2019-11-29 设计创作，主要内容包括：本发明涉及一种数字脉冲信号频率及占空比测量装置，包括AC/DC电源、多个接口控制插件、对外连接器和路由器；每个接口控制插件包括DC/DC电源、主控芯片、多种形式的多个数据接口和网络接口；外部电源连接AC/DC电源，AC/DC电源连接DC/DC电源的一端，DC/DC电源的另一端连接主控芯片和网络接口，主控芯片连接多个数据接口和所述网络接口；多个数据接口通过对外连接器连接被测数字设备，网络接口通过路由器连接上位机。本发明实施例公开的数字脉冲信号频率及占空比测量装置，可自动测量大规模数字脉冲信号，快速测试数字脉冲信号的频率、占空比等特性，用于实现对不同类型的数字脉冲发生设备的检测、计量等场景。(The invention relates to a digital pulse signal frequency and duty ratio measuring device, which comprises an AC/DC power supply, a plurality of interface control plug-ins, an external connector and a router; each interface control plug-in comprises a DC/DC power supply, a main control chip, a plurality of data interfaces in various forms and a network interface; the external power supply is connected with an AC/DC power supply, the AC/DC power supply is connected with one end of the DC/DC power supply, the other end of the DC/DC power supply is connected with a main control chip and a network interface, and the main control chip is connected with a plurality of data interfaces and the network interface; the plurality of data interfaces are connected with the digital equipment to be tested through the external connector, and the network interface is connected with the upper computer through the router. The digital pulse signal frequency and duty ratio measuring device disclosed by the embodiment of the invention can automatically measure large-scale digital pulse signals, quickly test the frequency, duty ratio and other characteristics of the digital pulse signals, and is used for realizing scenes such as detection, metering and the like of different types of digital pulse generating equipment.)

1. A digital pulse signal frequency and duty ratio measuring device is characterized by comprising an AC/DC power supply, a plurality of interface control plug-ins, an external connector and a router;

each interface control plug-in comprises a DC/DC power supply, a main control chip, a plurality of data interfaces in various forms and a network interface;

the external power supply is connected with the AC/DC power supply, the AC/DC power supply is connected with one end of the DC/DC power supply, the other end of the DC/DC power supply is connected with the main control chip and the network interface, and the main control chip is connected with the plurality of data interfaces and the network interface;

the plurality of data interfaces are connected with the digital equipment to be tested through the external connectors, and the network interfaces are connected with the upper computer through the router.

2. The apparatus according to claim 1, wherein the data interface is a bi-directional communication interface for providing the excitation signal to the digital device under test if necessary.

3. The device for measuring the frequency and duty cycle of a digital pulse signal according to claim 1, wherein the main control chip employs an FPGA, and the data interface includes a TTL level interface and an RS422 differential level interface.

4. The apparatus as claimed in claim 3, wherein each of said interface control cards comprises 50 TTL level interfaces and 200 RS422 differential level interfaces.

5. The apparatus as claimed in claim 1, wherein the AC/DC power supply is further connected to the external connector, and the external connector is connected to the digital device to be tested to supply DC power to the digital device to be tested.

6. The device for measuring the frequency and duty cycle of a digital pulse signal according to any one of claims 1 to 5, further comprising a box, wherein the AC/DC power supply, the plurality of interface control cards, the external connector and the router are integrated in the box.

7. The device for measuring the frequency and duty cycle of a digital pulse signal of claim 6, further comprising a heat dissipation mechanism, wherein the heat dissipation mechanism is fixed on the sidewall of the case.

8. The apparatus according to claim 7, wherein the heat dissipation mechanism comprises fans disposed opposite to each other on two sidewalls of the housing, and the fans generate an air path passing through gaps between the plurality of interface control plugs.

9. The device for measuring the frequency and duty ratio of a digital pulse signal according to any one of claims 1 to 5, wherein the frequency measuring range of the device for measuring the frequency and duty ratio of the digital pulse signal is 1KHz to 60MHz, and the duty ratio data measuring range is from 0% to 100%.

10. A digital pulse signal frequency measuring system, characterized by comprising the digital pulse signal frequency and duty ratio measuring device of any one of claims 1 to 9, and further comprising an upper computer, wherein the digital pulse signal frequency and duty ratio measuring device is connected with the upper computer.

Technical Field

The invention relates to the technical field of measurement, in particular to a device and a system for measuring the frequency and the duty ratio of a digital pulse signal.

Background

With the development of industrial technology, digital devices have been widely used in various fields. Various different functions, different types of digital pulse signals are applied in large numbers to various scenes. The measurement of these digital pulse signals, especially the measurement of multiple digital pulse signals in a large-scale application scenario, is a difficult problem, a general-purpose instrument cannot provide a large-scale input interface, the test is time-consuming and labor-consuming, and how to quickly and accurately measure the frequency and duty cycle characteristics of a large-scale digital pulse signal is an urgent need.

Disclosure of Invention

The invention aims to solve the technical problem in the prior art and provides a device and a system for measuring the frequency and the duty ratio of a digital pulse signal.

To solve the above technical problem, an embodiment of the present invention provides a digital pulse signal frequency and duty ratio measuring apparatus, including: the system comprises an AC/DC power supply, a plurality of interface control plug-ins, an external connector and a router;

each interface control plug-in comprises a DC/DC power supply, a main control chip, a plurality of data interfaces in various forms and a network interface;

the external power supply is connected with the AC/DC power supply, the AC/DC power supply is connected with one end of the DC/DC power supply, the other end of the DC/DC power supply is connected with the main control chip and the network interface, and the main control chip is connected with the plurality of data interfaces and the network interface;

the plurality of data interfaces are connected with the digital equipment to be tested through the external connectors, and the network interfaces are connected with the upper computer through the router.

The invention has the beneficial effects that: the digital pulse signal frequency and duty ratio measuring device disclosed by the embodiment of the invention can automatically measure large-scale (up to hundreds of paths) digital pulse signals, quickly test the characteristics of the frequency, the duty ratio and the like of the digital pulse signals, is used for realizing scenes such as detection, measurement and the like of different types of digital pulse generating equipment, and greatly saves the time and the energy of the test; the device has rich interfaces, flexible configuration and strong universality, can test and verify the digital signals by externally providing a 220V power supply, and supports test visualization through network cable connection.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the data interface adopts a bidirectional communication interface, and provides an excitation signal to the digital device to be tested under the condition of requirement.

Further, the main control chip adopts an FPGA, and the data interface comprises a TTL level interface and an RS422 differential level interface.

Further, each interface control plug-in comprises 50 paths of TTL level interfaces and 200 paths of RS422 differential level interfaces.

Further, the AC/DC power supply is also connected with the external connector, and is connected with the digital device to be tested through the external connector to provide direct current for the digital device to be tested.

Further, the box body is further included, and the AC/DC power supply, the plurality of interface control plug-ins, the external connector and the router are integrated in the box body.

Further, still include heat dissipation mechanism, heat dissipation mechanism is fixed in on the box lateral wall.

Furthermore, the heat dissipation mechanism comprises fans which are oppositely arranged on two side walls of the box body, and an air path generated by the fans penetrates through gaps among the plurality of interface control plug-in units.

Furthermore, the frequency measuring range of the digital pulse signal frequency and duty ratio measuring device is 1 KHz-60 MHz, and the duty ratio data measuring range is from 0% to 100%.

In order to solve the technical problem, an embodiment of the present invention further provides a digital pulse signal frequency measurement system, including the digital pulse signal frequency and duty ratio measurement device according to the above technical scheme, and further including an upper computer, where the digital pulse signal frequency and duty ratio measurement device is connected to the upper computer.

Drawings

Fig. 1 is a schematic diagram of a pulse signal frequency measuring device according to an embodiment of the present invention;

fig. 2 is a hardware structure diagram of a pulse signal frequency measuring device according to an embodiment of the present invention.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Fig. 1 is a schematic diagram of a pulse signal frequency measurement device according to an embodiment of the present invention. Fig. 2 is a hardware structure diagram of a pulse signal frequency measuring device according to an embodiment of the present invention.

As shown in fig. 1 and 2, the device comprises: the system comprises an AC/DC power supply, a plurality of interface control plug-ins, an external connector and a router; each interface control plug-in comprises a DC/DC power supply, a main control chip, a plurality of data interfaces in various forms and a network interface; the external power supply is connected with the AC/DC power supply, the AC/DC power supply is connected with one end of the DC/DC power supply, the other end of the DC/DC power supply is connected with the main control chip and the network interface, and the main control chip is connected with the plurality of data interfaces and the network interface; the plurality of data interfaces are connected with the digital equipment to be tested through the external connectors, and the network interfaces are connected with the upper computer through the router.

The digital pulse signal frequency and duty ratio measuring device disclosed by the embodiment can automatically measure large-scale (up to hundreds of paths) digital pulse signals, quickly test the characteristics of the frequency, the duty ratio and the like of the digital pulse signals, is used for realizing scenes such as detection, metering and the like of different types of digital pulse generating equipment, and greatly saves the time and the energy of testing; the device has rich interfaces, flexible configuration and strong universality, can test and verify the digital signals by externally providing a 220V power supply, and supports test visualization through network cable connection.

Optionally, the data interface adopts a bidirectional communication interface, and provides an excitation signal to the digital device under test if necessary.

In the above embodiments, the excitation signal is provided to the digital device under test, that is, the pulse signal frequency and duty ratio measuring device can also be used as a pulse generator.

Optionally, the main control chip adopts an FPGA, and the data interface includes a TTL level interface and an RS422 differential level interface.

In this embodiment, the interface control plug-in uses a large-scale FPGA as a main control chip, and all interface chips are connected to the FPGA. The FPGA adopts low-cost EP2C70F896I8N of Altera company, the TTL interface chip adopts SN74LVTH162245DGGR, the RS422 interface chip adopts MAX3045BESE + and MAX3096ESE +, and the network chip adopts W5300 and HX1188 NL. And a NiosII embedded system is adopted in the FPGA to collect and measure the digital signals to be measured and calculate the frequency and duty ratio data of each signal. The board cards fully utilize the powerful parallel computing capacity of the FPGA, each board card collects hundreds of signals simultaneously to form a data packet, the data packet of the board card is uploaded to an upper computer through a network cable, and the upper computer can perform analysis processing. The software of the upper computer is matched with the device, so that clear and comprehensive visual measurement results can be provided.

In the above embodiment, the testing device has interfaces of various forms for external digital pulse signals to be tested, and has up to 400 signal acquisition channels, which can simultaneously test hundreds of digital pulse signals.

In this embodiment, 4 interface control plug-ins are used as the core computing board, each interface control plug-in provides a large number of TTL and RS422 differential interfaces, and is connected to the external connector of the rear panel of the device through a wiring harness. Each of the interface control cards may include a 50 way TTL level interface and a 200 way RS422 differential level interface.

Optionally, the AC/DC power supply is further connected to the external connector, and the digital device to be tested is connected to the external connector through the external connector, so as to provide direct current for the digital device to be tested. In this embodiment, an AC/DC power supply is installed in the device to provide a 5.5VDC power supply to supply power to each board card in the device, and the 5.5VDC power supply is also introduced to an external connector to provide direct current to the digital device to be tested.

Optionally, the system further comprises a box, wherein the AC/DC power supply, the plurality of interface control cards, the external connector and the router are integrated in the box. The device can be integrated into a standard 19-inch combination, has high integration level, and can be directly mounted on a rack in a standard industrial equipment cabinet.

Optionally, the heat dissipation device further comprises a heat dissipation mechanism, and the heat dissipation mechanism is fixed on the side wall of the box body.

Optionally, the heat dissipation mechanism includes fans disposed opposite to each other on two side walls of the box, and an air path generated by the fans passes through gaps between the plurality of interface control plugs.

Optionally, the frequency measurement range of the digital pulse signal frequency and duty ratio measurement device is 1KHz to 60MHz, and the duty ratio data measurement range is from 0% to 100%.

The embodiment of the invention also provides a digital pulse signal frequency measuring system which comprises the digital pulse signal frequency and duty ratio measuring device and an upper computer, wherein the digital pulse signal frequency and duty ratio measuring device is connected with the upper computer.

In the embodiment, the digital pulse signal frequency and duty ratio measuring device can be connected with an upper computer through a network cable, the upper computer controls the measuring device to work, signal measurement data acquired by the measuring device can be transmitted to the upper computer through a network port, and the condition of a measured signal is automatically displayed after processing.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.