CN114371672A - DCS response time testing system - Google Patents

Abstract

The embodiment of the present invention discloses a DCS system response time test system. The system includes: an input signal generation circuit, an output signal acquisition circuit, and a signal detection device; the input signal generation circuit is connected to an AI card of the DCS system, and the input signal generation circuit is connected to an AI card of the DCS system. The input signal generation circuit includes: a signal source for generating signals and a first resistor; the output signal acquisition circuit is connected to the AO card or DO card of the DCS system, and the output signal acquisition circuit includes: a second resistor The signal detection device is used to detect the voltage on both sides of the first resistor to obtain a first voltage signal, and detect the voltage on both sides of the second resistor to obtain a second voltage signal, and then according to the first voltage signal and the second voltage signal to determine the response time of the DCS system. The present invention provides an accurate and convenient solution for detecting the response time of the DCS system.

Description

DCS system response time test system

technical field

The invention relates to the technical field of DCS systems, in particular to a DCS system response time testing system.

Background technique

The distributed control system is referred to as DCS, which can also be literally translated as "distributed control system". It adopts the basic design idea of decentralized control, centralized operation and management, and adopts a multi-layer hierarchical, cooperative and autonomous structure. Its main feature is its centralized management and decentralized control. DCS has been widely used in electric power, metallurgy, petrochemical and other industries.

DCS controls all aspects of the entire process, ranging from a small instrument on site to the entire large equipment, such as the steam turbine of a thermal power plant. Therefore, improving the stability and reliability of DCS directly affects the operation safety of the process. The response time is an important indicator of the DCS system, but due to the confidentiality of the respective technologies of the DCS systems produced by various manufacturers, the response time of the DCS system cannot be checked internally, which makes it difficult to accurately detect the response time of the DCS system at present.

It can be seen that how to accurately and conveniently detect the response time of the DCS system is a technical problem that needs to be solved urgently in the art.

SUMMARY OF THE INVENTION

In order to realize the accurate and convenient detection of the response time of the DCS system, the present invention proposes a response time test system of the DCS system.

In order to achieve the above object, according to an aspect of the present invention, a DCS system response time test system is provided, the system comprising: an input signal generation loop, an output signal acquisition loop and a signal detection device;

The input signal generating circuit is connected to the AI card of the DCS system, and the input signal generating circuit includes: a signal source for generating a signal and a first resistor;

The output signal acquisition circuit is connected to the AO card or the DO card of the DCS system, and the output signal acquisition circuit includes: a second resistor;

The signal detection device is used to detect the voltage on both sides of the first resistor to obtain a first voltage signal, and detect the voltage on both sides of the second resistor to obtain a second voltage signal, and then according to the first voltage signal and The second voltage signal determines the response time of the DCS system.

Optionally, the signal detection device is specifically configured to determine the trigger time of the input signal according to the first voltage signal, and determine the response time of the output signal according to the second voltage signal, and then subtract the response time of the output signal from the output signal. The response time of the DCS system is obtained at the trigger moment of the input signal.

Optionally, a power supply is provided on the input signal generating loop or the input signal generating loop is connected to the power supply in the DCS system.

Optionally, the output signal acquisition loop is provided with a power supply or the output signal acquisition loop is connected to the power supply in the DCS system.

Optionally, the signal source is used to generate a pulse signal.

In order to achieve the above object, according to another aspect of the present invention, another DCS system response time test system is also provided, and the system includes:

Input signal generation circuit, output signal acquisition circuit and signal detection equipment;

The input signal generating circuit is connected to the DI card of the DCS system, and the input signal generating circuit includes a switch and a trigger circuit, and the trigger circuit is used to control the on-off of the switch to generate the on-off signal;

The output signal acquisition circuit is connected to the AO card or the DO card of the DCS system, and the output signal acquisition circuit includes: a second resistor;

The signal detection device is used for detecting the voltage on both sides of the switch to obtain a first voltage signal, and detecting the voltage on both sides of the second resistor to obtain a second voltage signal, and then according to the first voltage signal and the The second voltage signal determines the response time of the DCS system.

Optionally, the switch is a high-speed thyristor switching device.

The beneficial effects of the present invention are:

In the embodiment of the present invention, the input signal is generated by the input signal generation loop and input to the input terminal (AI card or DI card) of the DCS system, and then the output of the output terminal (AO or DO) of the DCS system is collected through the output signal acquisition circuit, and then The signal is detected according to the signal detection device, and the response time of the DCS system is determined according to the detected signal, thereby realizing the technical effect of accurately and conveniently detecting the response time of the DCS system.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts. In the attached image:

Fig. 1 is the schematic diagram of the DCS system response time test system of the first embodiment of the present invention;

Fig. 2 is the schematic diagram of the DCS system response time test system of the second embodiment of the present invention;

Fig. 3 is the schematic diagram of the DCS system response time test system of the third embodiment of the present invention;

4 is a schematic diagram of a signal when the operation cycle is 20ms according to an embodiment of the present invention;

5 is a schematic diagram of a signal when the operation period is 100ms according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a signal when the operation period is 400 ms according to an embodiment of the present invention.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "comprising" and "having" in the description and claims of the present invention and the above-mentioned drawings, as well as any modifications thereof, are intended to cover non-exclusive inclusion.

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The DCS system response time testing system of the present invention includes an input signal generating circuit, an output signal collecting circuit and a signal detecting device.

It should be noted that the DCS system includes: AI card, AO card, DI card and DO card.

The AI card is an AI analog input card, which is used to convert the analog quantity of the controlled object into a digital signal that can be recognized by the computer.

The AO card is an AO analog output card, which is used to convert the output digital signal of the computer into an analog signal that can be accepted by an external process control instrument or device.

The DI card is a DI digital input card, which is used to convert the switch signal with only two states in the production process into a signal form that can be recognized by the computer.

The DO card is a DO digital output card, which is used to convert the digital signal represented by the binary code output by the computer into a digital signal that can control the production process or display the state.

Fig. 1 is a schematic diagram of a DCS system response time testing system according to a first embodiment of the present invention. The dotted line in Fig. 1 is the original DCS system. As shown in Fig. 1, in an embodiment of the present invention, the input signal generation loop and the AI The device is connected, the input signal generation circuit is used to generate the signal, and the generated signal is sent to the AI card. As shown in FIG. 1 , the input signal generating circuit specifically includes: a signal source and a first resistor R1 . As shown in FIG. 1 , in an embodiment of the present invention, the output signal acquisition circuit is connected to the AO card of the DCS system, and is used to receive the signal output by the AO card. As shown in Figure 1, the output signal acquisition loop includes: a second resistor R2. As shown in FIG. 1, the signal detection device G1 is used to detect the voltage on both sides of the first resistor R1 to obtain a first voltage signal CH1, and detect the voltage on both sides of the second resistor R2 to obtain a second voltage signal CH2, and then according to the first The voltage signal CH1 and the second voltage signal CH2 determine the response time of the DCS system.

In an optional embodiment of the present invention, a power supply is provided on the input signal generating circuit, or the input signal generating circuit is connected to the power supply in the DCS system (that is, the input signal generating circuit can use the internal power supply of the DCS system or the DCS system system external power supply). The output signal acquisition circuit is provided with a power supply or the output signal acquisition circuit is connected to the power supply in the DCS system (that is, the output signal acquisition circuit can use the internal power supply of the DCS system or the external power supply of the DCS system). In the embodiment of FIG. 1 , a solution is adopted in which a power supply is provided on the input signal generating circuit, and the output signal acquisition circuit is connected to the power supply in the DCS system. The scheme of the input signal generation loop connecting the power supply in the DCS system can be shown in Figure 2, and the scheme of setting the power supply on the output signal acquisition loop can be shown in Figure 3.

In an embodiment of the present invention, the signal detection device G1 is specifically configured to determine the trigger time of the input signal according to the first voltage signal CH1, and determine the response time of the output signal according to the second voltage signal CH2, and then use the The response time of the DCS system is obtained by subtracting the triggering time of the input signal from the response time of the output signal. In an embodiment of the present invention, the signal source generates a pulse signal, so as to better determine the trigger time of the input signal from CH1 and the response time of the output signal from CH2.

As shown in Figure 1, the present invention adopts a channel in an analog input card AI from the DCS system (in the embodiment of Figure 1, the AI channel external power supply mode is adopted, DC is a constant current source, if AI is a voltage type, DC can be replaced with a constant voltage source. Similarly, the power supply in the DCS system can be used to connect, but the wiring method of the input signal generation circuit and the power supply method of the signal source need to be changed); the other uses the analog output card AO in the One channel (the power supply mode in the DCS system of the AO adopted in the embodiment of Fig. 1, that is, DC1 is the constant current source in the DCS system, if the AO output is a voltage signal, then DC1 is a constant voltage source. The same output signal acquisition loop is based on the actual It needs to be able to use external power supply, but it is only necessary to increase external power supply and wiring). The data interaction between AI and AO is realized through the internal algorithm connection of the DCS system.

In one embodiment of the present invention, the AI channel detection is divided into current and voltage detection, which is generally widely used as current detection, that is, the detection current is 4-20 mA (4 mA corresponds to 0% of the range, and 20 mA corresponds to 100%). In order to increase the detection sensitivity, anti-interference ability and reliability, it is necessary to add a DC power supply to the input signal generation loop (generally a voltage of 1V-2V). The signal source in the input signal generation loop adopts high-precision frequency-adjustable pulse signal or sine wave signal (pulse signal should be used to detect the response time of the DCS system, to detect the stability of the DCS system signal and the recurrence characteristics of the input and output signals). At the same time, a first resistor R1 in series is set in the input signal generation loop (the specific resistance value is 100Ω-500Ω, and the current 4-20mA is converted into a voltage signal, and the specific voltage value can be obtained from Ohm's law U=IR ₁ ).

In an embodiment of the present invention, the AO channel detection is divided into current and voltage detection, which is generally widely used as current detection, that is, the detection current is 4-20 mA (4 mA corresponds to 0% of the range, and 20 mA corresponds to 100%). The embodiment in Figure 1 adopts the internal power supply mode of the DCS system, the AO channel outputs a 4-20mA constant current source, and the second resistor R2 is connected in series to convert it into a voltage detection signal (the specific resistance value can be 100Ω-500Ω, according to the current 4-20mA is converted into The voltage signal, the specific voltage value can be obtained by Ohm's law U=IR ₂ ).

In an embodiment of the present invention, G1 is a high-speed signal detection device, and its signal resolution is within 0.0005s. According to the operation period of a common DCS system, the operation period is between 20ms and 500ms. According to the Shannon sampling theorem, the signal resolution of G1 can meet the requirements. . One channel CH1 of G1 is connected to both ends of R1, that is, the signal input side; the other channel CH2 is connected to both ends of R2, that is, the signal output side. By detecting the signal waveforms at both ends of R1 and R2, and analyzing the waveforms, the input signal trigger time is determined from CH1, the output signal response time is determined from CH2, and the time between the input signal trigger time and the output signal response time is determined. The time difference is the response time of the DCS system.

Fig. 2 is a schematic diagram of a DCS system response time test system according to a second embodiment of the present invention. The dotted line in Fig. 2 is the original DCS system. As shown in Fig. 2, in an embodiment of the present invention, the input signal generation loop and the DI card The device is connected, and the input signal generating circuit is used to generate the on-off signal, and send the generated on-off signal to the DI card. Due to the input switch signal (ie on-off signal) of the DI card, in the embodiment of FIG. 2 , the input signal generating circuit specifically includes a switch T1 and a trigger circuit, and the trigger circuit is used to control the switch T1 . On and off to generate the on-off signal. In the embodiment of FIG. 2 , the output signal acquisition circuit is connected to the AO card of the DCS system for receiving the signal output by the AO card. As shown in Figure 2, the output signal acquisition loop includes: a second resistor R2. As shown in FIG. 2, the signal detection device G1 is used to detect the voltage on both sides of the switch T1 to obtain a first voltage signal CH1, and detect the voltage on both sides of the second resistor R2 to obtain a second voltage signal CH2, and then according to the first voltage signal CH1 and the second voltage signal CH2 determine the response time of the DCS system.

In an optional embodiment of the present invention, a power supply is provided on the input signal generating circuit, or the input signal generating circuit is connected to the power supply in the DCS system (that is, the input signal generating circuit can use the internal power supply of the DCS system or the DCS system system external power supply). The output signal acquisition circuit is provided with a power supply or the output signal acquisition circuit is connected to the power supply in the DCS system (that is, the output signal acquisition circuit can use the internal power supply of the DCS system or the external power supply of the DCS system). In the embodiment of FIG. 2, a solution is adopted in which the input signal generating circuit is connected to the power supply in the DCS system, and the output signal acquisition circuit is connected to the power supply in the DCS system.

As shown in Figure 2, the DI signal in the figure is the internal power supply type of the DCS system, and it is a voltage signal. The input signal generation loop generates an on-off signal to prevent the jitter problem during the opening and closing of the ordinary switch signal, which brings about the monitoring process. Unnecessary judgment interferes with the problem. Therefore, the switch T1 adopts a high-speed thyristor switching device, and the on-off of the switch T1 is controlled by the trigger circuit. When T1 is turned off, the monitoring CH1 voltage is the DC no-load voltage value of the power supply, such as 5V. When T1 is turned on, CH1 What is monitored is the device voltage drop across switch T1 (usually small, such as 0.1V). The moment when the voltage drops from the DC no-load voltage value of the power supply to the voltage drop of the devices at both ends of the switch T1 (ie, the moment when the on-off signal appears) is the trigger moment of the input signal.

The collection of the AO card by the output signal collection circuit of the embodiment of FIG. 2 is exactly the same as that of the embodiment of FIG. 1 . For details, refer to the embodiment of FIG. 1 , which will not be repeated here.

In the embodiment of FIG. 2, the signal detection device G1 is used to detect the voltage on both sides of the switch T1 to obtain the first voltage signal CH1, and to detect the voltage on both sides of the second resistor R2 to obtain the second voltage signal CH2, and then according to the first voltage The signal CH1 and the second voltage signal CH2 determine the response time of the DCS system. Specifically, the signal detection device G1 analyzes the first voltage signal CH1, and takes the moment when the voltage in CH1 drops from the DC no-load voltage value of the power supply to the voltage drop of the devices at both ends of the switch T1 as the input signal trigger time t1, and the second voltage The response time t2 of the output signal is determined in the signal CH2, and then the response time of the DCS system is obtained by subtracting t1 from t2.

Fig. 3 is a schematic diagram of a DCS system response time test system according to a third embodiment of the present invention. The dotted line in Fig. 3 is the original DCS system. As shown in Fig. 3, in an embodiment of the present invention, the input signal generation loop and the AI card The device is connected, and the input signal generating circuit is used to generate a signal (preferably a pulse signal), and send the generated signal to the AI card. As shown in FIG. 3 , the input signal generating circuit specifically includes: a signal source and a first resistor R1 . As shown in Figure 3, in this embodiment, the output signal acquisition circuit is connected to the DO card of the DCS system, and is used to receive the signal output by the DO card, and the output of the DO card is a switch signal (ie, on-off signal). . As shown in FIG. 3 , the output signal acquisition loop includes: a second resistor R2. As shown in FIG. 3, the signal detection device G1 is used to detect the voltage on both sides of the first resistor R1 to obtain a first voltage signal CH1, and detect the voltage on both sides of the second resistor R2 to obtain a second voltage signal CH2, and then according to the first The voltage signal CH1 and the second voltage signal CH2 determine the response time of the DCS system.

As shown in FIG. 3 , in the embodiment of FIG. 3 , a power supply is provided in the input signal generating circuit, that is, an external power supply scheme of the DCS system is adopted, and a power supply is provided in the output signal acquisition circuit in the embodiment of FIG.

In the embodiment of FIG. 3 , the output of the DO card is a switch signal (ie, on-off signal), and the signal detection device G1 determines that the on-off signal in the second voltage signal CH2 appears as the output signal response time.

In the embodiment of FIG. 3 , the input is the AI signal, and the output is the monitoring loop of the DO signal. AI is as described above. DO adopts external power supply mode. The CH2 channel of G1 monitors the voltage across the protection resistor R2. When AI is triggered, it outputs DO signal through DCS logic operation. DO generates an on-off signal. By judging the voltage across R2, the response time of the output signal can be determined.

In the fourth embodiment of the present invention, the input signal generating circuit is connected to the DI card, and the input signal generating circuit is used to generate the on-off signal, and send the generated on-off signal to the DI card. Since the input of the DI card is a switch signal (ie on-off signal), in the embodiment of FIG. 2 , the input signal generating circuit specifically includes: a switch T1 and a trigger circuit, and the trigger circuit is used to control the switch T1 on and off to generate the on-off signal. The output signal acquisition circuit is connected with the DO card of the DCS system, and is used to receive the signal output by the DO card. The output of the DO card is a switch signal (ie on-off signal). The output signal acquisition circuit includes: a second resistor R2. In this embodiment, the signal detection device G1 is used to detect the voltage on both sides of the switch T1 to obtain the first voltage signal CH1, and to detect the voltage on both sides of the second resistor R2 to obtain the second voltage signal CH2, and then according to the first voltage signal CH1 and the second voltage signal CH2 determine the response time of the DCS system.

In the fourth embodiment, the input of the DI card is a switch signal (ie on-off signal), the output of the DO card is a switch signal (ie on-off signal), and the signal detection device G1 can determine the first voltage signal The time when the on-off signal in CH1 appears is the trigger time of the input signal, and it is determined that the time when the on-off signal in the second voltage signal CH2 appears is the time when the output signal responds.

It can be seen from the above embodiments that the solution of the present invention can solve the problem of monitoring the response time of all types of DCS systems, as well as different types of cards and different power supply types in the DCS.

The above solutions of the present invention will be explained below with reference to specific embodiments.

Adopt the scheme of the present invention to set the data and graphics of CH1 and CH2 detected by the DPU control operation cycle under the conditions of 20ms, 100ms and 400ms respectively.

1. The operation cycle of the DPU controller is 20ms.

According to the scheme of the embodiment in FIG. 1, after the G1 detection device is connected, the signal source is started to generate a pulse signal, and the recorded waveform is shown in FIG. 4.

As shown in Figure 4, CH1 is the voltage signal at both ends of the input channel R1, and the trigger time is time _t1 ; CH2 is the voltage signal at both ends of the output channel R2, and the received signal time is _t2 . According to Δt=t ₂ −t ₁ =38.46ms, the response time is 38.46ms. That is, the full response time of DCS is 38.46ms, Δt=AI sampling filter time+DPU operation cycle time+AO output conversion time. At the same time, for the output signal of this test, it can be seen that the step change is stable after three times, and the continuity of the response change is poor. At the same time, for the test, the arithmetic average can be used after multiple tests to eliminate random errors.

2. The operation cycle of the DPU controller is 100ms.

According to the scheme of the embodiment in FIG. 1 , the G1 detection device is started after access, the signal source is started to generate a pulse signal, and the recorded waveform is shown in FIG. 5 .

As shown in Figure 5, CH1 is the voltage signal at both ends of the input channel R1, and the trigger time is time _t1 ; CH2 is the voltage signal at both ends of the output channel R2, and the received signal time is _t2 . According to Δt=t ₂ −t ₁ =149.42ms, the response time is 149.42ms. That is, the full response time of DCS is 149.42ms.

Δt=AI sampling filter time+DPU operation cycle time+AO output conversion time. At the same time, the output signal of this test can be relatively stable, and the continuity of its response changes is better. At the same time, for the test, the arithmetic average can be used after multiple tests to eliminate random errors.

Under high-speed operation conditions, the AO response time is limited by its own hardware D/A conversion chip, and the discontinuity in the output process is obvious; when the signal rate decreases, the continuity is improved. Therefore, the signal detection device G1 of the present invention can also analyze the CH2 waveform to determine whether there is a step in the CH2 waveform. If there is a step, it can be determined that the current DPU controller operation cycle is too small (that is, the signal rate is too large). , to prompt the staff to set the operation cycle of the DPU controller.

3. The operation cycle of DPU controller is 400ms.

According to the scheme of the embodiment in FIG. 1 , the G1 detection device is started after access, the signal source is started to generate a pulse signal, and the recorded waveform is shown in FIG. 6 .

As shown in Figure 6, CH1 is the voltage signal at both ends of the input channel R1, and the trigger time is time _t1 ; CH2 is the voltage signal at both ends of the output channel R2, and the received signal time is _t2 . According to Δt=t ₂ −t ₁ =458.75ms, the response time is 458.75ms. That is, the full response time of DCS is 458.75ms.

Δt=AI sampling filter time+DPU operation cycle time+AO output conversion time. At the same time, the output signal of this test can be relatively stable, and the continuity of its response changes is better. At the same time, for the test, the arithmetic average can be used after multiple tests to eliminate random errors.

It can be seen from the above embodiments that the present invention solves the problem of DCS system response time test, and can objectively detect the response time of the whole process from receiving signal, AD conversion, signal processing, logic operation, to signal output, and DA conversion of the system. . Thus, a reliable and extensive test method is provided for evaluating DCS performance indicators.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a DCS system response time test system, is characterized in that, comprises: input signal generation loop, output signal acquisition loop and signal detection equipment; The input signal generating circuit is connected to the AI card of the DCS system, and the input signal generating circuit includes: a signal source for generating a signal and a first resistor; The output signal acquisition circuit is connected to the AO card or the DO card of the DCS system, and the output signal acquisition circuit includes: a second resistor; The signal detection device is used to detect the voltage on both sides of the first resistor to obtain a first voltage signal, and detect the voltage on both sides of the second resistor to obtain a second voltage signal, and then according to the first voltage signal and The second voltage signal determines the response time of the DCS system. 2 . The DCS system response time test system according to claim 1 , wherein the signal detection device is specifically configured to determine the triggering moment of the input signal according to the first voltage signal, and to determine the trigger time of the input signal according to the second voltage signal. 3 . Determine the response time of the output signal, and then subtract the trigger time of the input signal from the output signal response time to obtain the response time of the DCS system. 3 . The DCS system response time testing system according to claim 1 , wherein a power supply is provided on the input signal generating circuit or the input signal generating circuit is connected to a power supply in the DCS system. 4 . 4 . The DCS system response time testing system according to claim 1 , wherein a power supply is provided on the output signal acquisition loop or the output signal acquisition loop is connected to a power supply in the DCS system. 5 . 5. The DCS system response time testing system according to claim 1, wherein the signal source is used to generate a pulse signal. 6. A DCS system response time test system, characterized in that, comprising: an input signal generation loop, an output signal acquisition loop and a signal detection device; The input signal generating circuit is connected to the DI card of the DCS system, and the input signal generating circuit includes a switch and a trigger circuit, and the trigger circuit is used to control the on-off of the switch to generate the on-off signal; The output signal acquisition circuit is connected to the AO card or the DO card of the DCS system, and the output signal acquisition circuit includes: a second resistor; The signal detection device is used for detecting the voltage on both sides of the switch to obtain a first voltage signal, and detecting the voltage on both sides of the second resistor to obtain a second voltage signal, and then according to the first voltage signal and the The second voltage signal determines the response time of the DCS system. 7 . The DCS system response time test system according to claim 6 , wherein the signal detection device is specifically configured to determine the triggering moment of the input signal according to the first voltage signal, and to determine the trigger time of the input signal according to the second voltage signal. 8 . Determine the response time of the output signal, and then subtract the trigger time of the input signal from the output signal response time to obtain the response time of the DCS system. 8 . The DCS system response time testing system according to claim 6 , wherein a power supply is provided on the input signal generating circuit or the input signal generating circuit is connected to a power supply in the DCS system. 9 . 9 . The DCS system response time testing system according to claim 6 , wherein the output signal acquisition loop is provided with a power supply or the input signal generation loop is connected to the power supply in the DCS system. 10 . 10 . The DCS system response time test system according to claim 6 , wherein the switch is a high-speed thyristor switch device. 11 .

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