External trigger control system

Abstract

The utility model relates to an external trigger control system, comprising a power switch; a power conversion module; the PLC is provided with a signal input terminal and a corresponding signal output terminal, the signal input terminal comprises a power supply input terminal, a common end and a first input terminal, the signal output terminal comprises a common power supply end and a first output terminal, the power supply input terminal receives a direct-current power supply, the common end is connected with the negative electrode end of the direct-current power supply, and the first input terminal is connected with the first output terminal; an external trigger signal is connected in series between the first input terminal and the positive electrode end of the direct-current power supply; a coil of the first relay is connected between the first output terminal and a common power supply provided by the common power supply end; and the network connection port is used for outputting a switching signal of the normally open switch of the first relay, and an upper computer connected with the tracker controller is connected with the network connection port through a network cable. The laser tracker is triggered by using an external trigger signal, and the use flexibility of the laser tracker is improved.

Description

An external trigger control system Technical Field

[0001] This utility model relates to the field of laser tracker measurement technology, specifically to an external trigger control system. Background Technology

[0002] Laser trackers, as portable, high-precision, high-speed absolute laser measurement systems with powerful dynamic six-degree-of-freedom capabilities, integrate numerous advanced measurement functions and are widely used in various industrial fields such as aviation, aerospace, automotive, shipbuilding, manufacturing, and robotics. With the widespread application of measurement equipment and systems, the flexibility and efficiency of measurement are becoming increasingly important.

[0003] To improve the application flexibility of laser trackers, external trigger signals are sometimes required to start and stop the laser tracker's measurements. However, for laser trackers that do not have a reserved external trigger interface in their hardware (such as the AT500 laser tracker), the only way to trigger the laser tracker's start and stop measurements is to send dry contact signals to the laser tracker's controller through the host computer software. This makes it impossible to directly control the laser tracker's measurements with external trigger signals, resulting in poor trigger flexibility and inconvenience in certain applications. Summary of the Invention

[0004] To address the aforementioned technical problems, the purpose of this utility model is to provide an external trigger control system that uses a PLC and a first relay to convert external trigger signals, enabling the laser tracker to be triggered by external trigger signals, thereby improving the flexibility of using the laser tracker.

[0005] To solve the above-mentioned technical problems, the present invention proposes the following technical solution:

[0006] This application relates to an external trigger control system, including an external trigger control box, the external trigger control box comprising:

[0007] Power switch;

[0008] A power conversion module, wherein the power switch is connected between the AC power and the power supply terminal of the power conversion module, and the power conversion module is used to convert the AC power into DC power.

[0009] The PLC has signal input terminals and corresponding signal output terminals. The signal input terminals include a power input terminal, a common terminal and a first input terminal. The signal output terminals include a common power terminal and a first output terminal. The power input terminal receives the DC power supply. The common terminal is connected to the negative terminal of the DC power supply. An external trigger signal is connected in series between the first input terminal and the positive terminal of the DC power supply.

[0010] The first relay has its coil connected between the first output terminal and the common power supply provided by the common power supply terminal;

[0011] The network connection port is used to output the switching signal of the normally open switch of the first relay. The host computer connected to the tracker controller is connected to the network connection port via a network cable.

[0012] The external trigger signal is a dry contact signal, and the power switch is turned on when the external trigger signal is present; otherwise, the power switch is turned off.

[0013] In some embodiments of this application, the external trigger control box further includes:

[0014] A signal input port that receives the external trigger signal;

[0015] The power conversion module, PLC, and first relay are all housed within the housing, and the power switch, signal input port, and network connection port are provided on the side wall of the housing.

[0016] In some embodiments of this application, the external trigger control box further includes:

[0017] The first indicator unit is connected to the output circuit of the power conversion module.

[0018] In some embodiments of this application, the external trigger control box further includes:

[0019] The second indicating unit is connected in series with the normally open switch of the first relay between the positive and negative terminals of the DC power supply.

[0020] In some embodiments of this application, the external triggering control system further includes:

[0021] The signal input unit includes an external trigger line and an external signal port connected to one end of the external trigger line. The other end of the external trigger line is connected to the external trigger signal, and the external signal port is connected to the signal input port.

[0022] In some embodiments of this application, one of the external signal port and the signal input port is one of a male D-type data interface connector and a female D-type data interface connector, and the other of the external signal port and the signal input port is one of a male D-type data interface connector and a female D-type data interface connector.

[0023] In some embodiments of this application, the external trigger signal is a start / stop external trigger signal or a clock external trigger signal;

[0024] When the external trigger signal is a start / stop external trigger signal, the host computer connected to the tracker controller is connected to the network port via a network cable to trigger the start / stop measurement of the laser tracker connected to the tracker controller;

[0025] When the external trigger signal is always an external trigger signal, the host computer connected to the tracker controller is connected to the network port via a network cable to trigger the clock signal of the laser tracker connected to the tracker controller.

[0026] Compared with the prior art, the external trigger control system provided in this application has the following advantages and beneficial effects:

[0027] By controlling the presence or absence of an external trigger signal, the user controls the power switch to open or close, thereby controlling whether the power conversion module outputs DC power. Then, using the PLC and the first relay, the external trigger signal is converted into a switching signal of the normally open switch of the first relay. The converted switching signal is then output to the network port of the host computer via a network cable, enabling the host computer to control the external trigger of the laser tracker through the tracker controller. This facilitates the external triggering of laser trackers that do not have a reserved external trigger interface, improving the flexibility of using the laser tracker in different situations.

[0028] This application also relates to an external trigger control system, including an external trigger control box, the external trigger control box comprising:

[0029] Power switch;

[0030] A power conversion module, wherein the power switch is connected between the AC power and the power supply terminal of the power conversion module, and the power conversion module is used to convert the AC power into DC power.

[0031] The PLC has signal input terminals and corresponding signal output terminals. The signal input terminals include a power input terminal, a common terminal, a first input terminal, and a second input terminal. The signal output terminals include a common power terminal, a first output terminal, and a second output terminal. The power input terminal receives the DC power supply. The common terminal is connected to the negative terminal of the DC power supply. An external trigger signal for starting or stopping is connected in series between the first input terminal and the positive terminal of the DC power supply. An external trigger signal for clocking is connected in series between the second input terminal and the positive terminal of the DC power supply.

[0032] The first relay has its coil connected between the first output terminal and the common power supply provided by the common power supply terminal;

[0033] The second relay has its coil connected between the second output terminal and the common power supply provided by the common power supply terminal;

[0034] A network connection port is used to output the switching signals of the normally open switches of the first relay and the normally open switches of the second relay. The host computer connected to the tracker controller is connected to the network connection port via a network cable.

[0035] The start / stop external trigger signal and the clock external trigger signal are both dry contact signals. When the start / stop external trigger signal and / or the clock external trigger signal are present, the power switch is turned on; otherwise, the power switch is turned off.

[0036] In some embodiments of this application, the external trigger control box further includes:

[0037] The first indicator unit is connected to the output circuit of the power conversion module.

[0038] In some embodiments of this application, the external trigger control box further includes:

[0039] The second indicating unit is connected in series with the normally open switch of the first relay between the positive and negative terminals of the DC power supply.

[0040] The third indicating unit is connected in series with the normally open switch of the second relay between the positive and negative terminals of the DC power supply.

[0041] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 is a schematic diagram of the connection between the external trigger control system proposed in this utility model and the host computer.

[0044] Figure 2 is a circuit diagram showing the connection between the power switch and the power conversion module in the external trigger control system proposed in this utility model.

[0045] Figure 3 is a circuit diagram showing the connection between the PLC, the first relay, and the second relay in the external trigger control system proposed in this utility model.

[0046] Figure 4 is a circuit diagram of the external trigger control system proposed in this utility model, used to indicate the conversion of external trigger signals;

[0047] Figure 5 is a schematic diagram of the external trigger control system proposed in this utility model;

[0048] Figure 6 is a schematic diagram of the signal input port of the external trigger control box in the external trigger control system proposed in this utility model;

[0049] Figure 7 is a block diagram illustrating the principle of the external triggering control system proposed in this invention triggering multiple laser trackers.

[0050] Figure label:

[0051] 100. External trigger control system; 110. External trigger control box; 111. Power switch; 112. Power conversion module; 113A. First indicator unit; 113B. Second indicator unit; 113C. Third indicator unit; 114. PLC; 114A. Signal input terminal; 114B. Signal output terminal; 115. First relay; 116. Second relay; 117. Signal input port; 118. Network connection port; 120. Signal input unit; 121. External trigger line; 122. External signal port; 200. Host computer; 300. Switch. Detailed Implementation

[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0053] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0054] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0055] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0056] To enable external triggering of a laser tracker that does not have an external trigger hardware interface, as shown in Figure 1, this application relates to an external trigger control system 100. The external trigger control system 100 includes an external trigger control box 110. In use, the external trigger control box 110 sends an external trigger signal to a host computer 200 that is network-connected to the tracker controller. After receiving the signal, the host computer 200 controls the tracker controller to trigger the laser tracker.

[0057] In some embodiments of this application, the external trigger signal can be a start / stop external trigger signal or a clock external trigger signal. These signals are all dry contact signals. The start / stop external trigger signal is used to trigger the start / stop measurement of the laser tracker, and the clock external trigger signal is used to trigger the clock signal of the laser tracker.

[0058] In some embodiments of this application, referring to Figures 2 to 5, the external trigger control box 110 includes a power switch 111, a power conversion module 112, a PLC 114, and a first relay 115.

[0059] The power switch 111 is connected between the AC power supply and the power supply terminal of the power conversion module 112. When the power switch 111 is turned on, it can supply power to the power conversion module 112, so that the AC power is converted into DC power (e.g., DC 24V voltage). When the power switch 111 is turned off, the AC power does not supply power to the power conversion module 112, and the power conversion module 112 does not output DC power (see Figure 2, the DC power is DC 24V).

[0060] In some embodiments of this application, referring to FIG2, the power switch 111 can be a circuit breaker QA, which is operated by the user to turn on and off.

[0061] In some embodiments of this application, to indicate the power supply status to the user, referring to FIG2, the external trigger control box 110 further includes a first indicator unit 113A, which is connected to the output circuit of the power conversion module 112. That is, when the power conversion module 112 outputs DC power, the DC power supplies the first indicator unit 113A, and the first indicator unit 113A issues an indication indicating that the power conversion module 112 is outputting DC power; when the power conversion module 112 does not output DC power, the first indicator unit 113A is not powered and therefore does not issue an indication, indicating that the power conversion module 112 is not outputting DC power.

[0062] The first indicator unit 113A can be a red indicator light.

[0063] In some embodiments of this application, the conversion of external trigger signals is specifically described.

[0064] Referring to Figure 3, the start / stop external trigger signal can be represented as the STA switch signal formed by STA+ / STA-, and the clock external trigger signal can be represented as the CLK switch signal formed by CLK+ / CLK-.

[0065] The PLC 114 includes signal input terminal 114A and corresponding signal output terminal 114B.

[0066] Referring to Figure 3, the signal input terminal 114A includes a power input terminal L+ / M, a common terminal 1M, a first input terminal I0.0, and a second input terminal I0.1.

[0067] The power input terminal L+ / M receives the DC power output from the power conversion module 112, such as 24V DC.

[0068] The signal output terminal 114B includes a common power supply terminal 3L+ / 3M, a first output terminal O0.0, and a second output terminal O0.1.

[0069] The common power supply terminal 3L+ / 3M provides a common power supply, such as 24V DC (i.e., 24V DC).

[0070] The first input terminal I0.0 can be used to connect an external STA switch signal, and the second input terminal I0.0 can be used to connect an external CLK switch signal.

[0071] The common terminal 1M is connected to the negative terminal G of the DC power supply. The STA switch signal is connected in series between the first input terminal I0.0 and the positive terminal of the DC power supply. The CLK switch signal is connected in series between the second input terminal I0.1 and the positive terminal of the DC power supply.

[0072] The first relay 115 serves as an intermediate relay. The normally open switch of the first relay 115 (i.e., the switch formed by the stationary contact 11 and the moving contact 14 of the first relay 115) and the PLC 114 are used to convert the start and stop external trigger signals, so that the converted start and stop external trigger signals can be sent to the host computer 200, thereby directly triggering the start and stop measurement of the laser tracker.

[0073] The second relay 116 serves as an intermediate relay. The normally open switch of the second relay 116 (i.e., the switch formed by the stationary contact 11 and the moving contact 14 of the second relay 116) and the PLC 114 are used to convert the external clock trigger signal, so that the converted external clock trigger signal can be sent to the host computer 200, thereby directly triggering the clock signal of the laser tracker.

[0074] The coil of the first relay 115 is connected between the first output terminal O0.0 and the common power supply, and the coil of the second relay 116 is connected between the second output terminal O0.1 and the common power supply.

[0075] As mentioned above, "first" and "second" are merely for distinguishing descriptions. It is not limited to the first input terminal I0.0 being used only to connect the STA switch signal; the first input terminal I0.0 can also be used to connect the CLK switch signal, and the second input terminal I0.1 can be used to connect the STA switch signal. Similarly, it is not limited to the first output terminal O0.0 being used only to connect the coil of the first relay 115; the first output terminal O0.0 can also be used to connect the coil of the second relay 116, and the second output terminal O0.1 can be used to connect the coil of the first relay 115, as long as the input terminal corresponds to the output terminal.

[0076] In some embodiments of this application, referring to FIG3, the first input terminal I0.0 is connected to the STA switch signal, which is converted by the switch signal of the normally open switch of the first relay 115 connected to the first output terminal O0.0; the second input terminal I0.1 is connected to the CLK switch signal, which is converted by the switch signal of the normally open switch of the second relay 116 connected to the second output terminal O0.1.

[0077] When the laser tracker needs to be triggered by an external start / stop trigger signal, the user can operate the power switch 111 to turn on. At the same time, the power conversion module 112 outputs 24V DC power and the first indicator unit 113A emits a red light indication. At this time, the 24V DC power is input to the PLC 114. The PLC 114 detects the start / stop external trigger signal at the first input terminal I0.0 and supplies power to the coil of the first relay 115 at the second output terminal O0.0.

[0078] When the coil of the first relay 115 is energized, as shown in Figure 3, the stationary contact 11 and the moving contact 14 of the first relay 115 are connected (that is, the normally open switch is closed). At this time, the external trigger control box 110 outputs the switching signal of the normally open switch of the first relay 115. This switching signal can be input to the host computer 200 connected to the tracker controller via the network cable through the network connection port 118, so as to realize the start and stop measurement control of the laser tracker.

[0079] In some embodiments of this application, in order to indicate the switching of the start / stop external trigger signal, referring to FIG4, the external trigger control box 110 further includes a second indicator unit 113B, which is connected in series with the normally open switch of the first relay 115 in the power supply circuit of the DC power supply.

[0080] When the coil of the first relay 115 is energized, its normally open switch is closed, and the DC power supply powers the second indicator unit 113B, causing it to emit a green light to indicate that the start / stop external trigger signal conversion is successful.

[0081] When the external clock trigger signal is needed to trigger the clock signal of the laser tracker, the user can operate the power switch 111 to turn on. At the same time, the power conversion module 112 outputs 24V DC power and the first indicator unit 113A emits a red light indication. At this time, the 24V DC power is input to the PLC 114. The PLC 114 detects the external clock trigger signal at the first input terminal I0.0 and supplies power to the coil of the second relay 116 at the second output terminal O0.1.

[0082] When the coil of the second relay 116 is energized, as shown in Figure 3, the stationary contact 11 and the moving contact 14 of the second relay 116 are connected (i.e., the normally open switch is closed). At this time, the external trigger control box 110 outputs the switching signal of the normally open switch of the second relay 116. This switching signal can be input to the host computer 200 connected to the tracker controller via the network connection port 118 through the network cable, thereby triggering the clock signal of the laser tracker.

[0083] In some embodiments of this application, in order to indicate the conversion of the external trigger signal of the clock, referring to FIG4, the external trigger control box 110 further includes a third indicator unit 113C, which is connected in series with the normally open switch of the second relay 116 in the power supply circuit of the DC power supply.

[0084] When the coil of the second relay 116 is energized, its normally open switch is closed, and the DC power supply powers the third indicator unit 113C, causing it to emit a blue light, indicating that the external trigger signal of the clock has been successfully converted.

[0085] Thus, through PLC 114 and intermediate relays (including first relay 115 and second relay 116), external trigger signals can be converted into dry contact signals acceptable to the tracker controller, thereby realizing trigger control of the laser tracker based on the external trigger signals.

[0086] In some embodiments of this application, in order to facilitate the use of the external trigger control box 110, the external trigger control box 110 is provided with a housing (not shown). The power conversion module 112, the first relay 115, the second relay 116 and the PLC 114 are all located in the internal space of the housing. The power switch 111 is located on the side wall of the housing for easy operation by the user. The external trigger control box 110 has an interface for connecting to external trigger signals and a network connection port 118 for outputting the converted switch signals, which facilitates wiring operations during field use.

[0087] The first indicator unit 113A, the second indicator unit 113B, and the third indicator unit 113C can also be located on the side wall of the housing for easy observation by the user.

[0088] For ease of field wiring, see Figure 5. The external trigger control box 110 includes a signal input port 117, which serves as the input interface of the external trigger control box 110 for receiving external trigger signals. The network connection port (e.g., an RJ45 network connector) 118 serves as the output interface of the external trigger control box 110 for outputting the converted switch signal to the host computer 200.

[0089] The signal input port 117 can be either male or female and is located on the side wall of the housing for easy plug-and-play connection.

[0090] In some embodiments of this application, for the convenience of field connection, referring to FIG5, the external trigger control system 100 further includes a signal input unit 120.

[0091] The signal input unit 120 includes an external trigger line 121 and an external signal port 122 connected to the external trigger line 121. The external trigger line 121 is used to receive external trigger signals, and the external signal port 122 is used to connect with the signal input port 117. For example, when the signal input port 117 is a female connector, the external signal port 122 is a corresponding male connector.

[0092] In some embodiments of this application, one of the external signal port 122 and the signal input port 117 is a male D-type data interface connector (e.g., DB9) and a female D-type data interface connector, and the other of the external signal port 122 and the signal input port 117 is a male D-type data interface connector and a female D-type data interface connector.

[0093] Referring to Figure 6, signal input port 117 can be selected with a DB9 female connector. Four of its pins are connected to STA+ and STA- of the STA switch signal and CLK+ and CLK- of the CLK switch signal, respectively. The remaining pins are reserved for future use.

[0094] Sometimes, it is necessary to trigger multiple laser trackers simultaneously with the same external trigger signal. To facilitate the wiring of each laser tracker (see Figure 7), a switch 300 can be set up. The host computer 200 and the switch 300 are connected via network cables. Multiple tracker controllers used to control the laser trackers are connected to the switch 300 via network cables. This allows the external trigger signal to be transmitted to each tracker controller through the external trigger control system 100, network cables, host computer 200, and switch 300. When wiring in the field, only the ports need to be plugged and unplugged, which facilitates the simultaneous connection of multiple laser trackers, greatly reduces the workload, and improves efficiency.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An external triggering control system, characterized in that, The system includes an external trigger control box, comprising: a power switch; a power conversion module, wherein the power switch is connected between AC power and the power supply terminal of the power conversion module, and the power conversion module is used to convert AC power into DC power; a PLC, having signal input terminals and corresponding signal output terminals, wherein the signal input terminals include a power input terminal, a common terminal, and a first input terminal, and the signal output terminals include a common power terminal and a first output terminal, wherein the power input terminals receive the DC power, the common terminal is connected to the negative terminal of the DC power, and an external trigger signal is connected in series between the first input terminal and the positive terminal of the DC power; a first relay, wherein its coil is connected between the first output terminal and the common power provided by the common power terminal; and a network connection port, which is used to output the switching signal of the normally open switch of the first relay, and the host computer connected to the tracker controller is connected to the network connection port via a network cable; wherein the external trigger signal is a dry contact signal, and when the external trigger signal is present, the power switch is turned on; otherwise, the power switch is turned off.

2. The external triggering control system according to claim 1, characterized in that, The external trigger control box further includes: a signal input port for receiving the external trigger signal; a housing, in which the power conversion module, PLC and the first relay are all disposed, and the power switch, signal input port and network connection port are disposed on the side wall of the housing.

3. The external triggering control system according to claim 1, characterized in that, The external trigger control box further includes a first indicator unit, which is connected to the output circuit of the power conversion module.

4. The external triggering control system according to claim 1, characterized in that, The external trigger control box further includes a second indicator unit, which is connected in series with the normally open switch of the first relay between the positive and negative terminals of the DC power supply.

5. The external triggering control system according to claim 2, characterized in that, The external trigger control system further includes a signal input unit, which includes an external trigger line and an external signal port connected to one end of the external trigger line, the other end of the external trigger line being connected to the external trigger signal, and the external signal port being connected to the signal input port.

6. The external triggering control system according to claim 5, characterized in that, One of the external signal port and the signal input port is a male D-type data interface connector and a female D-type data interface connector, and the other of the external signal port and the signal input port is a male D-type data interface connector and a female D-type data interface connector.

7. The external triggering control system according to claim 1, characterized in that, The external trigger signal is either a start / stop external trigger signal or a clock external trigger signal. When the external trigger signal is a start / stop external trigger signal, the host computer connected to the tracker controller is connected to the network port via a network cable to trigger the start / stop measurement of the laser tracker connected to the tracker controller. When the external trigger signal is a start / stop external trigger signal, the host computer connected to the tracker controller is connected to the network port via a network cable to trigger the clock signal of the laser tracker connected to the tracker controller.

8. An external triggering control system, characterized in that, The system includes an external trigger control box, comprising: a power switch; a power conversion module, wherein the power switch is connected between AC power and the power supply terminal of the power conversion module, and the power conversion module is used to convert AC power into DC power; and a PLC, which has signal input terminals and corresponding signal output terminals. The signal input terminals include a power input terminal, a common terminal, a first input terminal, and a second input terminal. The signal output terminals include a common power terminal, a first output terminal, and a second output terminal. The power input terminals receive the DC power, the common terminal is connected to the negative terminal of the DC power supply, and an external trigger signal for starting / stopping is connected in series between the first input terminal and the positive terminal of the DC power supply. An external trigger signal for clocking is also included. A first relay is connected in series between the second input terminal and the positive terminal of the DC power supply; a second relay is connected in series between the first output terminal and the common power supply provided by the common power supply terminal; a network connection port is used to output the switching signals of the normally open switches of the first relay and the second relay, and the host computer connected to the tracker controller is connected to the network connection port via a network cable; wherein, the start / stop external trigger signal and the clock external trigger signal are both dry contact signals, and the power switch is turned on when the start / stop external trigger signal and / or the clock external trigger signal are present, otherwise, the power switch is turned off.

9. The external triggering control system according to claim 8, characterized in that, The external trigger control box further includes a first indicator unit, which is connected to the output circuit of the power conversion module.

10. The external triggering control system according to claim 8, characterized in that, The external trigger control box further includes: a second indicator unit, which is connected in series with the normally open switch of the first relay between the positive and negative terminals of the DC power supply; and a third indicator unit, which is connected in series with the normally open switch of the second relay between the positive and negative terminals of the DC power supply.

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