Device and method for measuring working duration of gas ejector

Abstract

The invention discloses a device and a method for measuring the working duration of a gas ejector. The device comprises a gas conveying module, a gas ejector and a laser module, the gas ejector comprises a control valve seat and a runner valve body; the gas conveying module is used for conveying gas through a flow channel in the flow channel valve body when the control valve seat is opened and stopping conveying the gas when the control valve seat is closed; the laser module is used for emitting light to the control valve seat in the process that gas is sprayed outwards through the flow channel and determining a displacement signal according to the reflected light so as to determine the working duration time. According to the scheme, accurate measurement of the working duration of the gas ejector is realized.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of gas injectors, and in particular to a device and method for measuring the working duration of a gas injector. Background Art

[0002] The gas injector is the execution unit in the gas supply system. It receives the control signal from the electronic control unit and injects gas at a fixed time and in a fixed quantity. The duration of gas injection of the gas injector is related to the working conditions of the power system. The greater the load on the power system, the longer the duration, and vice versa.

[0003] Measuring the duration of gas injection of gas injectors is the premise for designing their control units. Currently, the gas is injected into the closed unit to be injected in the gas injector, and the pressure acquisition device collects the pressure changes in the closed unit to be injected. When the gas injector stops working, the control unit opens the pressure relief valve to reduce the pressure and restore the original pressure of the closed unit to be injected. The duration of the continuous pressure change is the duration of the gas injector. The main problem of this method is that the duration is affected by the pressure relief speed of the pressure relief valve, which seriously affects the measurement results and has low measurement accuracy. Summary of the invention

[0004] The present invention provides a device and method for measuring the working duration of a gas injector, so as to achieve accurate measurement of the gas injection time of the gas injector.

[0005] To achieve the above objectives, in a first aspect, an embodiment of the present invention provides a gas injector working duration measuring device, the gas injector working duration measuring device comprising: a gas delivery module, a gas injector and a laser module; the gas injector comprises a control valve seat and a flow channel valve body;

[0006] The gas delivery module is used to deliver gas through the flow channel in the flow channel valve body when the control valve seat is open, and stop delivering gas when the control valve seat is closed;

[0007] The laser module is used to emit light to the control valve seat when the gas is ejected outward through the flow channel, and determine the displacement signal of the control valve seat according to the reflected light to determine the working duration.

[0008] Optionally, the gas injector further includes: a current driving device; the driving device is used to output a current signal to the control valve seat according to a driving instruction of a host computer to open or close the control valve seat.

[0009] Optionally, the gas injector working duration measuring device further includes: a current detection module; the current detection module is used to detect the current signal output by the current driving device.

[0010] Optionally, the gas injector working duration measuring device further comprises: an oscilloscope; the oscilloscope is electrically connected to the current detection module; the oscilloscope is electrically connected to the laser module;

[0011] The oscilloscope is used to display the current signal and the displacement signal; the oscilloscope is also used to determine the working duration according to the current signal and the displacement signal; or, determine the working duration according to the displacement signal.

[0012] Optionally, the gas delivery module includes a gas storage unit, a pressure reducing valve and a pressure stabilizing tank; the gas storage unit is connected to the pressure stabilizing tank through the pressure reducing valve.

[0013] Optionally, the laser module is further used to determine the displacement response time according to the displacement signal.

[0014] In a second aspect, an embodiment of the present invention further provides a method for measuring the working duration of a gas injector, characterized in that it is applied to the device for measuring the working duration of a gas injector described in the first aspect above; the method comprises:

[0015] delivering gas through the flow channel in the flow channel valve body when the control valve seat is open, and stopping delivering gas when the control valve seat is closed;

[0016] The laser module emits light through the flow channel to the control valve seat during the process of gas being ejected outward through the flow channel;

[0017] The laser module determines a displacement signal according to the reflected light to determine the working duration.

[0018] Optionally, the gas injector working duration measuring device further comprises: a current detection module and an oscilloscope; the oscilloscope is electrically connected to the current detection module; the oscilloscope is electrically connected to the laser module;

[0019] The measuring method further comprises:

[0020] The oscilloscope displays the current signal and the displacement signal, and determines the working duration according to the current signal and the displacement signal; or determines the working duration according to the displacement signal.

[0021] Optionally, the measuring method further includes:

[0022] The laser module determines the movement speed information of the gas injector according to the displacement signal.

[0023] Optionally, the measuring method further includes:

[0024] The laser module determines the impact force information of the gas injector according to the reflected light.

[0025] In an embodiment of the present invention, the gas is conveyed through the flow channel in the flow channel valve body by the gas delivery module when the control valve seat is opened, and the gas delivery is stopped when the control valve seat is closed; the laser module emits light to the control valve seat during the process of gas being ejected outward through the flow channel, and determines a displacement signal based on the reflected light, so that during the process of gas being ejected outward through the flow channel, the control valve seat changes from opening and lifting upward to falling downward, and the laser module emits light to the control valve seat through the flow channel, and the control valve seat reflects the light to the laser module, and the laser module determines the displacement signal of the control valve seat based on the reflected light, thereby determining the entire time from the control valve seat opening and lifting upward to the control valve seat closing and falling downward, that is, determining the working duration of the gas injector, thereby accurately measuring the working duration of the gas injector by using optical principles.

[0026] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 is a schematic structural diagram of another gas injector working duration measuring device provided by an embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of a displacement signal L2 provided by an embodiment of the present invention;

[0030] Figure 3 is a schematic structural diagram of another gas injector working duration measuring device provided by an embodiment of the present invention;

[0031] Figure 4 is a schematic structural diagram of another gas injector working duration measuring device provided by an embodiment of the present invention;

[0032] Figure 5 is a schematic structural diagram of another gas injector working duration measuring device provided by an embodiment of the present invention;

[0033] Figure 6is a specific structural schematic diagram of another gas injector working duration measuring device provided by an embodiment of the present invention;

[0034] Figure 7 It is a flow chart of a method for measuring the working duration of a gas injector provided by an embodiment of the present invention;

[0035] Figure 8 is a flow chart of another method for measuring the working duration of a gas injector provided in an embodiment of the present invention;

[0036] Fig. 9 It is a flow chart of another method for measuring the working duration of a gas injector provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] Figure 1 is a schematic diagram of the structure of a gas injector working duration measuring device provided by an embodiment of the present invention, such as Figure 1 As shown, the gas injector working duration measuring device comprises: a gas delivery module 10, a gas injector 20 and a laser module 30; the gas injector 20 comprises a control valve seat 21 and a flow channel valve body 22;

[0040] The gas delivery module 10 is used to deliver gas through the flow channel in the flow channel valve body 22 when the control valve seat 21 is opened, and stop delivering gas when the control valve seat 21 is closed; the laser module 30 is used to emit light to the control valve seat 21 during the process of gas being ejected outward through the flow channel, and determine the displacement signal of the control valve seat 21 based on the reflected light to determine the working duration.

[0041] Among them, the control valve seat 21 can be opened or closed under external control instructions; when the control valve seat 21 is opened, the control valve seat 21 is lifted upward, and the gas delivery module 10 can deliver a certain amount of gas through the flow channel A in the flow channel valve body 22 according to different working conditions, and the gas enters the unit to be sprayed to complete the reaction; when the control valve seat 21 is closed, the control valve seat 21 falls downward, and the gas delivery module 10 cannot output gas to the unit to be sprayed to complete the reaction; in the process of gas spraying outward through the flow channel, the gas injection duration under different working conditions is the working injection duration, and the working injection duration is the entire time length of the control valve seat 21 from opening and lifting upward to falling downward;

[0042] The laser module 30 may include a laser and a computing unit; the laser may be a semiconductor laser, or a helium-neon laser, etc.; in the process of gas being ejected outward through the flow channel, the laser may emit light onto the control valve seat 21, wherein the control valve seat 21 may be made of metal material, or a metal patch may be used on its surface; the control valve seat 21 may reflect the light to the laser; the computing unit may determine the displacement signal of the control valve seat 21 according to the reflected light, and the displacement signal of the control valve seat 21 may reflect the overall motion trajectory of the control valve seat 21 from opening and lifting upward to closing and falling downward, so that according to the overall motion trajectory of the control valve seat 21 from opening and lifting upward to closing and falling downward, the entire duration of the control valve seat 21 from opening and lifting upward to closing and falling downward may be determined, and then the working duration of the gas injector may be determined, so that the optical principle is used to realize the accurate measurement of the working duration of the gas injector; the problem of low measurement accuracy in the prior art is avoided, and the problem of complicated measurement test operation and waste of manpower and time cost in the prior art is also avoided.

[0043] Specifically, Figure 2 is a schematic diagram of a displacement signal L2 provided by an embodiment of the present invention; Figure 2As shown, the displacement signal L2 includes a displacement response time T1, a displacement holding time T and a displacement recovery time T2; within the displacement response time T1, the displacement of the control valve seat 21 will change with a delay, and the displacement of the control valve seat 21 will hardly change; within the displacement holding time T, the displacement of the control valve seat 21 will increase to the maximum displacement and maintain it for a period of time; within the displacement recovery time T2, the displacement of the control valve seat 21 slowly decreases from the maximum displacement to 0; then the working duration t of the gas injector is the sum of the displacement holding time T and the displacement recovery time T2; that is, the working duration t satisfies: t=T+T2; it can be understood that the displacement response time T1 can also be determined separately according to the displacement signal of the control valve seat 21.

[0044] It should be noted that, in the actual process of measuring the gas injection time, for the safety and simplicity of the measurement process, the gas output by the gas delivery module 10 in this embodiment may be an inert protective gas, and the inert protective gas may be pure nitrogen, pure argon, etc.;

[0045] The flow channel valve body 22 may include at least one flow channel; the number of flow channels may be determined according to the structure of the gas injector 20; this embodiment does not make any specific limitation on this; it can be understood that when the flow channel valve body 22 includes multiple flow channels, the gas of the gas delivery module 10 can be ejected through any flow channel; the light emitted by the laser module 30 can be emitted to the control valve seat 21 through any flow channel; the corresponding reflected light can also be reflected to the upper laser through any flow channel.

[0046] Optionally, based on the above embodiment, the gas injector 20 is further refined. Figure 3 FIG. 1 is a schematic diagram of another gas injector operation duration measuring device provided by an embodiment of the present invention. Figure 3 As shown, the gas injector 20 further includes: a current driving device 23; the current driving device 23 is used to output a current signal to the control valve seat 21 according to a driving instruction of the host computer so as to open or close the control valve seat 21.

[0047] Among them, the control valve seat 21 can be an electromagnetic control valve seat; the current driving device 23 outputs a current signal to the electromagnetic control valve seat according to the driving instruction of the upper computer, and the electromagnetic control valve seat is energized or de-energized; when the electromagnetic control valve seat is energized, the electromagnetic control valve seat is opened; when the electromagnetic control valve seat is de-energized, the electromagnetic control valve seat is closed;

[0048] The driving instruction of the host computer can be a pulse working signal; when measuring the working duration of different gas injectors 20, the host computer can output different pulse working signals according to different electromagnetic control valve seats; the host computer output can be changed to different pulse working signals by changing the frequency and pulse width of the pulse working signal;

[0049] It should be noted that, continue to refer to Figure 2 , Figure 2 The current signal L1 diagram is also shown; the current signal L1 output according to the drive instruction of the upper computer corresponds to the displacement signal L2 of the control valve seat 21; that is, when the current signal L1 starts to be applied, the displacement of the control valve seat 21 responds within the displacement response time T1, and then the displacement of the control valve seat 21 starts to increase to the maximum displacement within the displacement holding time T, and is maintained for a certain time; when the current signal L1 stops being applied, the displacement of the control valve seat 21 slowly recovers to 0 within the displacement recovery time T1;

[0050] Among them, the current signal L1 is a current signal with variable current size during the application process; since the electromagnetic control valve seat needs to maintain a large electromagnetic suction force in the initial process of driving the electromagnetic control valve seat to open, a large current signal needs to be applied (exemplarily, I=I2); in the later stage of driving the electromagnetic control valve seat to open, the electromagnetic control valve seat no longer needs a large electromagnetic suction force to maintain the open state, and the current signal applied at this time can be smaller (exemplarily, I=I1, I1<I2); of course, in the closing stage of driving the electromagnetic control valve seat, the output current signal is 0.

[0051] Further, Figure 4 FIG. 1 is a schematic diagram of the specific structure of another gas injector working duration measuring device provided by an embodiment of the present invention. Figure 4 As shown, the gas injector working duration measuring device further includes: a current detection module 40; the current detection module 40 is used to detect the current signal output by the current driving device 23. The current detection module 40 can be a current clamp, which can detect the current signal output by the current driving device 23 in real time to avoid the inconsistency between the detected real-time current signal and the current signal output by the current driving device 23.

[0052] further, Figure 5 FIG. 1 is a schematic diagram of another gas injector operation duration measuring device provided by an embodiment of the present invention. Figure 5 As shown, the gas injector working duration measuring device also includes: an oscilloscope 50; the oscilloscope 50 is electrically connected to the current detection module 40; the oscilloscope 50 is electrically connected to the laser module 30; the oscilloscope 50 is used to display the current signal and the displacement signal; the oscilloscope 50 is also used to determine the working duration according to the current signal and the displacement signal; or, determine the working duration according to the displacement signal.

[0053] Wherein, in some embodiments, continue to refer to Figure 2, the oscilloscope 50 can determine the working duration t according to the current signal l1 and the displacement signal l2; specifically, the working duration t of the gas injector can also be: t=T0-T1+T2; T0 is the time from the start of the current signal application to the time when the current signal stops being applied; T1 is the displacement response time; T2 is the displacement recovery time; of course, it can be understood that the oscilloscope 50 can also determine the working duration t according to the displacement signal L2; the working duration t of the gas injector is: t=T+T2; the above two methods of determining the working duration t of the gas injector can be calibrated with each other, thereby further realizing the accurate measurement of the working duration of the gas injector.

[0054] Optionally, the gas delivery module 10 is further refined. Figure 6 FIG. 1 is a schematic diagram of the specific structure of another gas injector working duration measuring device provided by an embodiment of the present invention. Figure 6 As shown, the gas delivery module 10 in the gas injector working duration measuring device includes a gas storage unit 11, a pressure reducing valve 12 and a pressure stabilizing tank 13; the gas storage unit 11 is connected to the pressure stabilizing tank 13 through the pressure reducing valve 12.

[0055] Specifically, inert gas can be stored in the gas storage unit 11; in actual gas transportation, the pressure reducing valve 12 on the gas cylinder is opened, and the pressure reducing valve 12 can adjust the gas pressure output by the gas storage unit 11, and then the gas passes through the pressure reducing valve 12 into the pressure stabilizing tank 13 and fills the pressure stabilizing tank 13; the pressure stabilizing tank 13 can play a buffering role, stabilizing the gas pressure passing through the pressure reducing valve 12, thereby balancing the sudden pressure change generated when the gas injector is working, reducing the impact of the gas on the device, and improving the measurement accuracy.

[0056] Based on the same inventive concept, an embodiment of the present invention further provides a method for measuring the working duration of a gas injector, and the method for measuring the working duration of a gas injector is applied to the above-mentioned device for measuring the working duration of a gas injector; Figure 7 is a flow chart of a method for measuring the working duration of a gas injector provided by an embodiment of the present invention; Figure 7 As shown, the method for measuring the working duration of the gas injector specifically comprises the following steps:

[0057] S110, delivering gas through the flow channel in the flow channel valve body when the control valve seat is open, and stopping delivering gas when the control valve seat is closed;

[0058] Wherein, before the gas is delivered through the flow channel in the flow channel valve body when the control valve seat is opened, the control valve seat 21 can be opened under an external control command; when the control valve seat 21 is opened, the control valve seat 21 is lifted upward, and the gas delivery module 10 can deliver the gas through the flow channel A in the flow channel valve body 22 according to different working conditions, and the gas enters the unit to be injected to complete the reaction;

[0059] Before stopping gas delivery when the control valve seat is closed, the control valve seat 21 can be closed under an external control command. When the control valve seat 21 is closed, the control valve seat 21 drops downward, and the gas delivery module 10 cannot output gas to the unit to be injected to complete the reaction; in the process of gas being injected outward through the flow channel, the gas injection duration under different working conditions is the working injection duration, and the working injection duration is the entire time length for the control valve seat 21 to change from opening and lifting upward to dropping downward.

[0060] S120, the laser module emits light through the flow channel to the control valve seat during the process of gas being ejected outward through the flow channel;

[0061] In the process of gas ejecting outward through the flow channel, the laser in the laser module can emit light to the control valve seat 21, wherein the control valve seat 21 can be made of metal material, or a metal patch is used on its surface; the control valve seat 21 will reflect the light to the laser;

[0062] S130, the laser module determines a displacement signal according to the reflected light to determine the working duration.

[0063] Among them, the calculation unit in the laser module can determine the motion trajectory of the control valve seat 21 from opening and lifting upward to closing and falling downward according to the reflected light and output the corresponding displacement signal, thereby determining the entire time from opening and lifting upward to closing and falling downward of the control valve seat 21, and then determining the working duration of the gas injector (for details, refer to Figure 2 The working duration t of the gas injector is the sum of the displacement holding time T and the displacement recovery time T2), so the optical principle is used to achieve accurate measurement of the gas injection time of the gas injector.

[0064] Optionally, based on the above method embodiment, the method for determining the working duration is further optimized. Figure 5 In the measuring device for the working duration of the gas injector, Figure 8 is a flow chart of a method for measuring the working duration of a gas injector provided by an embodiment of the present invention; Figure 8 As shown, the method for measuring the working duration of the gas injector specifically comprises the following steps:

[0065] S210, delivering gas through the flow channel in the flow channel valve body when the control valve seat is open, and stopping delivering gas when the control valve seat is closed;

[0066] S220, the laser module emits light through the flow channel to the control valve seat during the process of gas being ejected outward through the flow channel;

[0067] S230, the laser module determines a displacement signal of the control valve seat according to the reflected light;

[0068] S240: The laser module determines the working duration according to the displacement signal, or the oscilloscope displays the current signal and the displacement signal, and determines the working duration according to the current signal and the displacement signal.

[0069] Wherein, in some embodiments, continue to refer to Figure 2 , the oscilloscope 50 can determine the working duration t according to the current signal l1 and the displacement signal l2; specifically, the working duration t of the gas injector can also be: t=T0-T1+T2; T0 is the time from the start of the current signal application to the time when the current signal stops being applied; T1 is the displacement response time; T2 is the displacement recovery time; of course, it can be understood that the oscilloscope 50 can also determine the working duration t according to the displacement signal L2; the working duration t of the gas injector is: t=T+T2;

[0070] Based on the above embodiment, this embodiment adds a method for determining the working duration; the above two methods for determining the gas injection time t of the gas injector can be calibrated with each other, thereby further realizing the accurate measurement of the gas injection time of the gas injector.

[0071] Optionally, based on the above embodiment, further optimization is performed; Fig. 9 is a flow chart of a method for measuring the working duration of a gas injector provided in an embodiment of the present invention; Fig. 9 As shown, the method for measuring the working duration of the gas injector specifically comprises the following steps:

[0072] S310, delivering gas through the flow channel in the flow channel valve body when the control valve seat is open, and stopping delivering gas when the control valve seat is closed;

[0073] S320, the laser module emits light through the flow channel to the control valve seat during the process of gas being ejected outward through the flow channel;

[0074] S330, the laser module determines a displacement signal of the control valve seat according to the reflected light;

[0075] S340, the laser module determines the working duration according to the displacement signal, or the oscilloscope displays the current signal and the displacement signal, and determines the working duration according to the current signal and the reflected light.

[0076] S350: The laser module determines the impact force information of the gas injector according to the displacement signal.

[0077] Among them, the laser module can determine the speed information and acceleration information of the control valve seat according to the displacement signal, and can determine the impact force information generated by the control valve seat when it moves up and down according to the acceleration information; that is, the magnitude of the impact force can be calculated according to the acceleration: F=ma, m is the mass of the control valve seat, and a is the acceleration.

[0078] In this embodiment, on the basis of determining the working duration of the gas injector, the impact force information of the gas injector can also be determined, thereby completing the overall performance test of the gas injector.

[0079] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A gas injector working duration measuring device, characterized in that: include: A gas delivery module, a gas injector and a laser module; the gas injector comprises a control valve seat and a flow channel valve body; The gas delivery module is used to deliver gas through the flow channel in the flow channel valve body when the control valve seat is open, and stop delivering gas when the control valve seat is closed; The laser module is used to emit light to the control valve seat when the gas is ejected outward through the flow channel, and determine the displacement signal of the control valve seat according to the reflected light to determine the working duration.

2. The gas injector operation duration measuring device according to claim 1, characterized in that: The gas injector further comprises: a current driving device; the driving device is used to output a current signal to the control valve seat according to a driving instruction of a host computer so as to open or close the control valve seat.

3. The gas injector operation duration measuring device according to claim 2, characterized in that: Also includes: Current detection module; The current detection module is used to detect the current signal output by the current driving device.

4. The gas injector operation duration measuring device according to claim 3, characterized in that: Also includes: Oscilloscope; The oscilloscope is electrically connected to the current detection module; the oscilloscope is electrically connected to the laser module; The oscilloscope is used to display the current signal and the displacement signal; the oscilloscope is also used to determine the working duration according to the current signal and the displacement signal; or, determine the working duration according to the displacement signal.

5. The gas injector operation duration measuring device according to claim 1, characterized in that: The gas delivery module includes a gas storage unit, a pressure reducing valve and a pressure stabilizing tank; the gas storage unit is connected to the pressure stabilizing tank through the pressure reducing valve.

6. The gas injector operation duration measuring device according to claim 1, characterized in that: The laser module is also used to determine the displacement response time according to the displacement signal.

7. A method for measuring the working duration of a gas injector, characterized in that: The device for measuring the working duration of a gas injector as claimed in any one of claims 1 to 6 above; the measuring method comprises: delivering gas through the flow channel in the flow channel valve body when the control valve seat is open, and stopping delivering gas when the control valve seat is closed; The laser module emits light through the flow channel to the control valve seat during the process of gas being ejected outward through the flow channel; The laser module determines a displacement signal of the control valve seat according to the reflected light to determine the working duration.

8. The method for measuring the working duration of a gas injector according to claim 7, characterized in that: The gas injector working duration measuring device further comprises: a current detection module and an oscilloscope; the oscilloscope is electrically connected to the current detection module; the oscilloscope is electrically connected to the laser module; The measuring method further comprises: The oscilloscope displays the current signal and the displacement signal, and determines the working duration according to the current signal and the displacement signal; or determines the working duration according to the displacement signal.

9. The method for measuring the working duration of a gas injector according to claim 7, characterized in that: Also includes: The laser module determines the movement speed information of the gas injector according to the displacement signal.

10. The method for measuring the working duration of a gas injector according to claim 7, characterized in that: Also includes: The laser module determines the impact force information of the gas injector according to the reflected light.

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