CN104570838A - Asynchronous external trigger device and method for multipath trigger delay - Google Patents

Abstract

The present invention is an asynchronous external trigger device with multi-channel trigger delay, including MCU, upper computer, external synchronous signal input unit, system power supply and multi-channel external trigger signal output unit; upper computer, external synchronous signal input unit, system power supply And multiple external trigger signal output units are respectively connected with the MCU. This system can realize the function of multi-channel trigger delay. After the system starts to run, when it receives an external synchronization signal, it can realize the signal output function of multi-channel trigger delay by setting different trigger delay times. The delay parameter information is set through the host computer software, which is convenient and quick to use, and is suitable for various external trigger systems.

Description

Asynchronous external trigger device and method for multi-channel trigger delay

technical field

The invention is an external trigger device, in particular to an asynchronous external trigger device and method with multi-channel trigger delay.

Background technique

In the optical test system, there are usually multiple devices for external trigger control. The control devices include lasers, data acquisition cards, CCD sensors, etc. In conventional measurement, it is enough to trigger these devices synchronously. The data acquisition card and CCD sensor should be triggered first, and the laser should be triggered later. The data collected by the data acquisition card should cover the entire process of the laser pulse. Covers the entire laser pulse. That is, the three trigger work asynchronously. During the test, this requires the trigger device to have an asynchronous trigger function, and to output multiple trigger signals.

Although a common external trigger device can output multiple trigger signals, it can only output synchronous trigger signals to trigger peripheral devices synchronously, but cannot trigger peripheral devices asynchronously, and cannot set the trigger delay, so the scope of application is narrow.

Contents of the invention

In order to solve the technical problems existing in the background technology, the present invention proposes an asynchronous external trigger device and method for multi-channel trigger delay, which can realize the function of multi-channel trigger delay.

The technical solution of the present invention is: an asynchronous external trigger device with multi-channel trigger delay, which is characterized in that it includes an MCU, a host computer, an external synchronization signal input unit, a system power supply, and a multi-channel external trigger signal output unit; The synchronization signal input unit, the system power supply and the multiple external trigger signal output units are connected to the MCU respectively.

The delay time of each external trigger signal output of the multi-channel external trigger signal output unit is controlled by the MCU, and the delay time of each external trigger signal is set independently.

The asynchronous external trigger method of multi-channel trigger delay is characterized in that: the method includes the following steps:

1) After the system starts running, set the multi-channel trigger delay time, that is, the time interval t1, t2...tn between the rising edge of the external synchronization signal input and the rising edge of the output trigger signal, and the trigger delay time of each channel is t1, t2 ...tn; the trigger delay time of each trigger signal is independent of each other;

2) When the system detects the input of an external synchronization signal, the MCU automatically turns on the trigger delay function, and the trigger delay function is realized by the timer of the MCU;

3) After time delays t1, t2...tn respectively, output the external trigger signals 1, 2...n.

The above method also includes step 4) repeating step 1)-step 3), when it is necessary to adjust the delay time of the output trigger signal, set it through the host computer: communicate with the host computer through serial port communication, the host computer will trigger the delay time The information is sent to the MCU for execution through the serial port.

The trigger delay time of each channel can be set separately through the host computer software, the adjustment range is 66.535 seconds, and the adjustment accuracy is 1 microsecond.

This system can realize the function of multi-channel trigger delay, which needs to be combined with software programming. After the system starts running, after receiving the external synchronization signal, the multi-channel trigger delay signal output function can be realized by setting different trigger delay times. The delay parameter information is set through the host computer software, which is convenient and quick to use, and is suitable for various external trigger systems.

Description of drawings

Fig. 1 is a block diagram of system hardware of the present invention;

Fig. 2 is a schematic diagram of the trigger delay of the system of the present invention;

Fig. 3 is a schematic diagram of the form of the trigger signal outside the system of the present invention;

Detailed ways

The external trigger device includes hardware and software. As shown in Figure 1, the hardware mainly includes MCU1 as the core controller of the system, the host computer 2 for setting the trigger delay parameters, and the external synchronous signal input 3 for receiving The synchronous signal input from outside the system, the system power supply 4 adopts 220V power supply, and the multi-channel external trigger signal output 5 is to output multiple external trigger signals after passing through the system.

The principle that the system can realize multi-channel trigger delay is as follows:

This function needs to be combined with software programming. As shown in Figure 2, after the system starts running, set the trigger delay time 1 through the host computer software, that is, the time interval t1, t2...tn between the rising edge of the external synchronization signal input and the rising edge of the output trigger signal, each trigger The delay time is t1, t2...tn; the trigger delay time of each trigger signal is independent of each other; then, detect the external synchronization signal input 2, when the external synchronization signal is detected, the MCU automatically turns on the trigger delay function, The trigger delay function is realized by the timer of the MCU; the delay is performed according to the current trigger delay time, and after the delay time is up, each external trigger signal 3 is output separately. After the output is completed, the system continues to detect the external synchronization signal 2, and then outputs the corresponding external trigger signal.

When it is necessary to adjust the delay time of the output trigger signal, set it through the host computer: communicate with the host computer through the serial port communication, and the host computer will send the time information of the trigger delay to the MCU through the serial port for execution.

The output form of the external trigger signal of the system is shown in Figure 3. The delay time t1, t2...tn between the rising edge of the external synchronization signal input and the rising edge of the external trigger signal output can be set separately through the host computer software, and the adjustment range is 66.535 seconds (m), the adjustment accuracy is 1 microsecond (us).

Claims (5)

1. the asynchronous external trigger device of multichannel Time delay, is characterized in that: comprise MCU, host computer, outer synchronous signal input block, system power supply and multichannel external trigger signal output unit; Host computer, outer synchronous signal input block, system power supply and multichannel external trigger signal output unit are connected with MCU respectively.

2. the asynchronous external trigger device of multichannel Time delay according to claim 1, it is characterized in that: each road external trigger signal of multichannel external trigger signal output unit exports and all controls delay time by MCU, and the delay time of each road external trigger signal is all independently arranged.

3. the asynchronous external trigger method of multichannel Time delay, is characterized in that: said method comprising the steps of:

1) after system brings into operation, is set, the time interval t1, t2 of namely outside synchronizing signal input rising edge and the trigger pip rising edge of output the multichannel Time delay time ... tn, each road Time delay time is t1, t2 ... tn; The Time delay time of each road trigger pip is separate;

2) when systems axiol-ogy is to the input of outside synchronizing signal, MCU opens Time delay function automatically, and Time delay function is realized by the timer of MCU;

3) respectively through time delay t1, t2 ... after tn, export each road external trigger signal 1,2 ... n.

4. the asynchronous external trigger method of multichannel Time delay according to claim 3, it is characterized in that: described method also comprises step 4) repeat step 1)-step 3), when needing adjustment to export the delay time of trigger pip, arranged by host computer: by serial communication and upper machine communication, the temporal information of Time delay sends to MCU to perform by serial ports by host computer.

5. the asynchronous external trigger method of multichannel Time delay according to claim 4, it is characterized in that: each road Time delay time is all arranged separately by upper computer software, range of adjustment is 66.535 seconds, and degree of regulation is 1 microsecond.