Testing device applied to ray inspection equipment

Abstract

The utility model provides a testing device applied to ray inspection equipment. The ray inspection equipment comprises a main controller; an inspection assembly adapted to perform an X-ray inspection within the inspection area under the control of the master controller; the transmission assembly is suitable for transmitting the test parcels in the feeding area, the inspection area and the discharging area; the testing device comprises a control loop which is electrically connected with the main controller and the frequency converter of the transmission assembly; the change-over switch is electrically connected with the control loop so as to start or stop working of the control loop and allow the control loop to enter an automatic state, so that a forward rotation signal is transmitted to the frequency converter through the main controller, and a reverse rotation signal is transmitted to the frequency converter after a preset time interval; the frequency converter drives the conveying belt of the transmission assembly to rotate forwards and backwards, and the test package is repeatedly fed into and moved out of the inspection area so as to test the aging degree of the test package caused by the X-rays.

Description

Technical Field

[0001] At least one embodiment of this utility model relates to the field of security inspection technology, and in particular to a testing device applied to X-ray inspection equipment. Background Technology

[0002] Radiographic inspection equipment typically includes an inspection component and a transport component. The inspection component is usually configured for unidirectional transport, meaning that packages are conveyed from the infeed area through the inspection area to the outfeed area. While the packages are in the inspection area, the inspection component generates X-rays to inspect them.

[0003] Before X-ray inspection equipment can be used normally, it needs to be tested. When testing the degree of aging caused by X-rays on test packages, because the transmission component cannot rotate back and forth, after each X-ray inspection, the test package needs to be manually moved from the discharge area to the feed area for multiple X-ray inspections. This results in long testing time, a large number of personnel required, and low work efficiency. Utility Model Content

[0004] In view of this, the present invention provides a testing device for use in X-ray inspection equipment, which can improve testing efficiency.

[0005] As one aspect of this utility model, a testing device for use in X-ray inspection equipment is provided. The X-ray inspection equipment includes a main controller, an inspection component, and a transmission component. The inspection component is adapted to perform X-ray inspection within an inspection area under the control of the main controller. The transmission component is adapted to transport test packages in an infeed area, an inspection area, and an outfeed area. The testing device includes a control loop and a switching switch. The control loop is electrically connected to the frequency converters of the main controller and the transmission component, respectively. The switching switch is electrically connected to the control loop to start or stop the operation of the control loop and allow the control loop to enter an automatic state, so as to transmit a forward rotation signal through the main controller to the frequency converter and transmit a reverse rotation signal to the frequency converter after a predetermined time interval, causing the frequency converter to drive the conveyor belt of the transmission component to rotate forward and reverse, and repeatedly feed and remove the test packages into and out of the inspection area to test the degree of aging caused by X-rays on the test packages.

[0006] According to an embodiment of this utility model, the testing device further includes a remote switch, which includes an operating handle suitable for generating start / stop signals and a receiving end communicatively connected to the operating handle. The receiving end is electrically connected to the control circuit. The control circuit is also adapted to enter a manual state under the control of the remote switch to transmit the forward rotation signal to the frequency converter via the main controller.

[0007] According to an embodiment of this utility model, the switching switch includes a stop contact, an automatic contact, a manual contact, and a switching terminal. The automatic contact is electrically connected to the control circuit; the manual contact is electrically connected to the receiving end; one end of the switching terminal is configured to be selectively electrically connected to the stop contact, the automatic contact, or the manual contact, and the other end of the switching terminal is electrically connected to one end of a DC power supply; wherein, the control circuit is connected to the other end of the DC power supply so that when the switching terminal is connected to the automatic contact, the control circuit is in the automatic state; when the switching terminal is connected to the manual contact, the control circuit is in the manual state; and when the switching terminal is connected to the manual contact, the control circuit is in a stopped working state.

[0008] According to an embodiment of this utility model, the control circuit has a first input terminal, a second input terminal, a first output terminal, and a second output terminal. The first input terminal is electrically connected to the automatic contact; the second input terminal is electrically connected to the manual contact through the receiving terminal; the first output terminal is detachably electrically connected to the main controller and is suitable for transmitting the forward rotation signal to the main controller; the second output terminal is detachably electrically connected to the frequency converter and is suitable for transmitting the reverse rotation signal to the frequency converter.

[0009] According to an embodiment of this utility model, there are multiple X-ray inspection devices, and the control circuit has multiple first output terminals and multiple second output terminals. The multiple first output terminals are detachably electrically connected to the main controllers of the multiple X-ray inspection devices; the multiple second output terminals are detachably electrically connected to the frequency converters of the multiple X-ray inspection devices.

[0010] According to an embodiment of the present invention, the testing device further includes a rectifier circuit, through which an external DC power supply supplies power to the control circuit. The rectifier circuit is adapted to prevent the DC power supply from supplying power to the control circuit when the positive and negative terminals of the DC power supply are reversed.

[0011] According to an embodiment of this utility model, the rectifier circuit includes a first diode, a second diode, a third diode, and a fourth diode. The anode of the first diode is connected to the positive terminal of the DC power supply; the cathode of the second diode is electrically connected to the cathode of the first diode; the cathode of the third diode is electrically connected to the anode of the second diode, and the cathode of the third diode is connected to the negative terminal of the DC power supply; the anode of the fourth diode is electrically connected to the anode of the third diode, and the cathode of the fourth diode is electrically connected to the anode of the first diode; wherein, the cathode of the first diode serves as the first power supply terminal of the rectifier circuit, and the anode of the third diode serves as the second power supply terminal of the rectifier circuit, so as to supply power to the control circuit through the first power supply terminal and the second power supply terminal.

[0012] According to an embodiment of the present invention, the control loop is implemented using a programmable logic controller.

[0013] According to an embodiment of the present invention, the X-ray inspection device further includes a detection component, which is electrically connected to the main controller and installed at the entrance between the feeding area and the inspection area. The main controller, in response to a detection signal from the detection component detecting that the test package has entered the inspection area, causes the inspection component to generate the X-ray.

[0014] According to an embodiment of the present invention, the control loop is also adapted to transmit a stop signal to the master controller when the transmission component is in a reverse state, so that the master controller controls the inspection component to stop generating the X-rays.

[0015] According to an embodiment of the present invention, a testing device for X-ray inspection equipment is used. By electrically connecting a switching switch to a control circuit, and the control circuit being electrically connected to the main controller and the frequency converter of the transmission component, the switching switch allows the control circuit to enter an automatic state. This allows the main controller to transmit a forward rotation signal to the frequency converter, and after a predetermined time interval, a reverse rotation signal to the frequency converter. The frequency converter then drives the conveyor belt of the transmission component to rotate forward and backward, repeatedly feeding and removing test packages into and out of the inspection area to test the degree of aging caused by X-rays. After one X-ray inspection, the test package does not need to be manually returned to the feeding area. The automatic reverse function of the control system returns the package to the feeding area, reducing manual handling. The automated cyclic testing process reduces the time wasted due to manual package handling, thereby shortening the overall testing time and improving testing efficiency. Attached Figure Description

[0016] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0017] Figure 1 This schematic diagram illustrates a connection view of the X-ray inspection equipment and testing apparatus according to an embodiment of the present invention.

[0018] Figure 2 This schematically illustrates a connection diagram of the X-ray inspection equipment and testing apparatus according to an embodiment of the present invention from another perspective; and

[0019] Figure 3 A circuit diagram of a test apparatus according to an embodiment of the present invention is shown schematically.

[0020] The annotations in the attached figures are explained as follows:

[0021] 1-Testing apparatus;

[0022] 11-Control loop;

[0023] 12-Receiver;

[0024] 13-Toggle switch;

[0025] 131 - Switching terminal;

[0026] 14-Rectifier circuit;

[0027] 2-Radiation inspection equipment;

[0028] 21-Main controller;

[0029] 22-Inspect components;

[0030] 23-Transmission components;

[0031] 231-Inverter;

[0032] 232 - Conveyor belt; and

[0033] 24 - Detection components. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0035] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0036] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0037] When using expressions such as "at least one of A, B, and C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C. Similarly, when using expressions such as "at least one of A, B, or C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C.

[0038] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference to the directions in the accompanying drawings and are not intended to limit the scope of protection of this utility model. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted where they may cause confusion in understanding this utility model.

[0039] Figure 1 This schematic diagram illustrates a connection view of the X-ray inspection equipment and testing apparatus according to an embodiment of the present invention. Figure 2 This schematically illustrates a connection diagram from another perspective of the X-ray inspection equipment and testing apparatus according to an embodiment of the present invention. Figure 3 A circuit diagram of a test apparatus according to an embodiment of the present invention is shown schematically.

[0040] As one aspect of this utility model, a testing device 1 is provided for use in a radiographic inspection device 2.

[0041] like Figure 1 and Figure 2 As shown, the X-ray inspection equipment 2 includes a main controller 21, an inspection component 22, and a transmission component 23. The inspection component 22 is adapted to perform X-ray inspection within the inspection area under the control of the main controller 21, and the transmission component 23 is adapted to transport test packages between the feeding area, the inspection area, and the discharge area.

[0042] like Figure 3As shown, the testing device 1 includes a control loop 11 and a switching switch 13. The control loop 11 is electrically connected to the main controller 21 and the frequency converter 231 of the transmission assembly 23, respectively. The switching switch 13 is electrically connected to the control loop 11 to start or stop the operation of the control loop 11 and allow the control loop 11 to enter an automatic state, so as to transmit a forward rotation signal through the main controller 21 to the frequency converter 231, and transmit a reverse rotation signal to the frequency converter 231 after a predetermined time interval, so that the frequency converter 231 drives the conveyor belt 232 of the transmission assembly 23 to rotate forward and reverse, and repeatedly feeds and removes the test package into and out of the inspection area to test the degree of aging caused by X-rays to the test package.

[0043] According to an embodiment of the present invention, the testing device 1 applied to the X-ray inspection equipment 2, by electrically connecting the switching switch 13 to the control circuit 11, and the control circuit 11 being electrically connected to the main controller 21 and the frequency converter 231 of the transmission component 23, allows the control circuit 11 to enter an automatic state via the switching switch 13. This allows the main controller 21 to transmit a forward rotation signal to the frequency converter 231, and after a predetermined time interval, a reverse rotation signal to the frequency converter 231. The frequency converter 231 then drives the conveyor belt 232 of the transmission component 23 to rotate forward and reverse. The conveyor belt 232 repeatedly feeds and removes the test package from the inspection area to test the degree of aging caused by X-rays. After one X-ray inspection, the test package does not need to be manually transported back to the feeding area. The automatic reverse function of the control system returns the package to the feeding area, reducing the workload of manual handling. The automated cyclic testing process reduces the time wasted due to manual handling of packages, thereby shortening the overall testing time and improving testing efficiency.

[0044] According to an embodiment of the present invention, the X-ray inspection device 2 is suitable for inspecting whether there are prohibited items such as drugs or explosives in luggage, handbags, or other packages in places with high personnel mobility, such as stations, airports, stadiums, and shopping malls.

[0045] According to embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the X-ray inspection device 2 also includes a support frame, within which an inspection area suitable for inspecting packages is formed. The inspection area has an inlet and an outlet communicating with the outside. A housing made of shielding material is provided on the support frame to prevent X-ray leakage. An inspection assembly 22 is mounted on the support frame and may include an X-ray emitting and receiving device, such as a CT scanner, to perform X-ray scanning inspection of packages transported to the inspection area by the transmission assembly 23.

[0046] According to an embodiment of this utility model, when the conveyor belt 232 is rotating in the forward direction, the conveyor belt 232 carries the package through the feeding area, enters the inspection area from the entrance, and then sends it from the exit to the discharge area (e.g., ...). Figure 1 and Figure 2 (The direction indicated by the middle arrow). When the conveyor belt is in reverse, the test package can be sent from the discharge area through the outlet into the inspection area, and then returned to the feeding area through the inlet (that is, with...). Figure 1 and Figure 2 The direction indicated by the middle arrow is opposite to the direction of the arrowhead.

[0047] According to an embodiment of this invention, the main controller 21 of the X-ray inspection device 2 stores an operating program. When the main controller 21 controls the transmission component 23 to deliver a package into the inspection area, the main controller 21 controls the inspection component 22 to perform X-ray inspection to inspect the package entering the inspection area.

[0048] According to an embodiment of this invention, when the X-ray inspection equipment 2 is in testing mode, the control loop 11 can enter automatic mode. A forward rotation signal is transmitted through the main controller 21 to the frequency converter 231, driving the conveyor belt 232 to rotate forward. The package passes through the feeding area, enters the inspection area from the inlet, and is then sent to the discharge area from the outlet. After a predetermined time interval, a reverse rotation signal is transmitted directly to the frequency converter 231 without passing through the main controller 21, causing the frequency converter 231 to drive the conveyor belt 232 in reverse. This achieves testing of the X-ray inspection equipment 2 without changing the operating program of the main controller 21.

[0049] In one illustrative embodiment, the predetermined time interval can be between 10 seconds and 1 minute, for example, any of 10 seconds, 15 seconds, 20 seconds, 30 seconds, and 60 seconds.

[0050] In one illustrative embodiment, the conveyor belt 232 has a switching time interval when switching between forward and reverse rotation, in order to reduce the impact on the motor and drive belt that drive the conveyor belt 232 and extend the service life of the equipment.

[0051] In one illustrative embodiment, the switching time interval can be 2-5 seconds, for example, any one of 2 seconds, 3 seconds, and 5 seconds.

[0052] In the process of realizing this utility model, it was discovered that in related technologies, the testing device 1 used in the X-ray inspection equipment 2 requires the addition of a temporary start button during the initial operation test of the X-ray inspection equipment 2. This start button is generally fixed on the testing device 1. During testing, it is inconvenient to both manually operate and control the operation of the X-ray inspection equipment 2 and to walk around the X-ray inspection equipment 2 to check its operation.

[0053] According to embodiments of the present invention, such as Figure 3 As shown, the test device 1 also includes a remote switch. The remote switch includes an operating handle for generating start / stop signals and a receiver 12 communicatively connected to the operating handle. The receiver 12 is electrically connected to the control loop 11. The control loop 11 is also adapted to enter a manual mode under the control of the remote switch, so as to transmit the forward rotation signal to the frequency converter 231 via the main controller 21.

[0054] In this embodiment, the switch 13 is connected in series with the receiver. When the switching terminal of the switch is connected to the manual contact, the control circuit 11 can be put into manual mode by controlling the operating handle. In manual mode, the frequency converter 231 can be started and stopped under the control of the operating handle. In this way, while the tester is inspecting the X-ray inspection equipment 2, he / she can start and stop the conveyor belt 232 at any time according to the actual situation of the X-ray inspection equipment 2, without having to return to a fixed position, thus improving the flexibility of the test and saving test time.

[0055] In one illustrative embodiment, the operating handle can be used as a wireless remote control, and the operating handle and the receiver 12 can communicate via any of infrared, radio waves, Bluetooth, etc.

[0056] According to embodiments of the present invention, such as Figure 3 As shown, the changeover switch 13 includes a stop contact A3, an automatic contact A1, a manual contact A2, and a switching terminal 131. The automatic contact A1 is electrically connected to the control circuit 11, the manual contact A2 is electrically connected to the receiving end 12, and one end of the switching terminal 131 is configured to selectively connect to the stop contact A3, the automatic contact A1, or the manual contact A2. The other end of the switching terminal 131 is electrically connected to one end of a DC power supply. The control circuit 11 is connected to the other end of the DC power supply so that when the switching terminal 131 is connected to the automatic contact A1, the control circuit 11 is in an automatic state; when the switching terminal 131 is connected to the manual contact A2, the control circuit 11 is in a manual state; and when the switching terminal 131 is connected to the manual contact A2, the control circuit 11 is in a stopped state.

[0057] In this embodiment, by setting the switch 13, the operator can select different operating modes (automatic, manual, or shutdown) as needed, improving operational flexibility. In an emergency, the switch 13 can be used to quickly switch the testing equipment to a shutdown state, ensuring the safety of personnel and equipment.

[0058] According to an embodiment of this utility model, the switch 13 is a single-pole three-throw switch. The switch terminal 131 can be selectively connected to one of the stop contact A3, the automatic contact A1, or the manual contact A2.

[0059] According to embodiments of the present invention, such as Figure 3 As shown, the control circuit 11 has a first input terminal, a second input terminal, a first output terminal, and a second output terminal. The first input terminal is electrically connected to the automatic contact A1, and the second input terminal is electrically connected to the manual contact A2 through the receiving terminal 12. The first output terminal is detachably electrically connected to the main controller 21 and is used to transmit a forward rotation signal to the main controller 21. The second output terminal is detachably electrically connected to the frequency converter 231 and is used to transmit a reverse rotation signal to the frequency converter 231.

[0060] In one illustrative embodiment, the first output terminal can be connected to terminal B1 via a wire, so that terminal B1 can be connected to the main controller 21 via an external wire. Similarly, the second output terminal can be connected to terminal B3 via a wire, so that terminal B3 can be connected to the control terminal on the frequency converter 231 via an external wire.

[0061] In one illustrative embodiment, control loop 11 also has a common terminal, which can be connected to terminal B5 via a wire. The common terminal, together with the second output terminal, serves as a passive dry contact connected to the control terminal on inverter 231.

[0062] In another illustrative embodiment, the first output terminal can be connected to a longer first wire, and the second output terminal can be connected to a longer second wire. In this way, it can be connected to the main controller 21 through the first wire and to the control terminal on the frequency converter 231 through the second wire.

[0063] According to an embodiment of this utility model, there are multiple X-ray inspection devices 2, and the control circuit 11 has multiple first output terminals and multiple second output terminals. The multiple first output terminals are detachably electrically connected to the main controller 21 of the multiple X-ray inspection devices 2. The multiple second output terminals are detachably electrically connected to the frequency converter 231 of the multiple X-ray inspection devices 2.

[0064] In such an embodiment, multiple X-ray inspection devices 2 can be tested simultaneously through multiple first output terminals and multiple second output terminals.

[0065] In one illustrative embodiment, in manual mode, control loop 11 can only test one X-ray inspection device 2 at a time. The next X-ray inspection device 2 can only be tested after the current test is completed. That is, in manual mode, the forward rotation signal of one X-ray inspection device 2 is interlocked with the forward rotation signals of other X-ray inspection devices 2.

[0066] In one illustrative embodiment, there can be two first output terminals and two second output terminals. The two first output terminals are connected to the main controllers 21 of the two X-ray inspection devices 2 via terminals B1 and B2, respectively. The two second output terminals are connected to the frequency converters 231 of the two X-ray inspection devices 2 via terminals B3 and B4, respectively.

[0067] According to embodiments of the present invention, such as Figure 3 As shown, the test device 1 also includes a rectifier circuit 14. An external DC power supply supplies power to the control circuit 11 through the rectifier circuit 14. The rectifier circuit 14 is adapted to prevent the DC power supply from supplying power to the control circuit 11 when the positive and negative terminals of the DC power supply are reversed.

[0068] In this embodiment, by setting up the rectifier circuit 14, circuit damage caused by incorrect power supply polarity is prevented, thereby improving the reliability and stability of the test device 1 and reducing maintenance costs and downtime.

[0069] In one illustrative embodiment, the distribution panel of the X-ray inspection equipment 2 can serve as the DC power supply for the testing device 1. The DC power (e.g., 24V) from the distribution panel of the X-ray inspection equipment 2, through terminals B6 and B7, first passes through the rectifier circuit 14 before powering the entire testing device 1.

[0070] According to embodiments of the present invention, such as Figure 3 As shown, the rectifier circuit 14 includes a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4. The anode of the first diode D1 is connected to the positive terminal of the DC power supply. The cathode of the second diode D2 is electrically connected to the cathode of the first diode D1. The cathode of the third diode D3 is electrically connected to the anode of the second diode D2, and the cathode of the third diode D3 is connected to the negative terminal of the DC power supply. The anode of the fourth diode D4 is electrically connected to the anode of the third diode D3, and the cathode of the fourth diode D4 is electrically connected to the anode of the first diode D1. The cathode of the first diode D1 serves as the first power supply terminal of the rectifier circuit 14, and the anode of the third diode D3 serves as the second power supply terminal of the rectifier circuit 14, supplying power to the control circuit 11 through both terminals.

[0071] In such an embodiment, the rectifier circuit 14 is a bridge rectifier circuit consisting of four diodes to prevent the positive and negative terminals of the DC power supply from being connected incorrectly.

[0072] According to embodiments of the present invention, such as Figure 2As shown, the X-ray inspection device 2 also includes a detection component 24. The detection component 24 is electrically connected to the main controller 21 and is installed at the entrance between the feeding area and the inspection area. In response to the detection signal that the detection component 24 detects the test package entering the inspection area, the main controller 21 causes the inspection component 22 to generate X-rays.

[0073] According to an embodiment of the present invention, the control loop 11 is also adapted to transmit a stop signal to the main controller 21 when the transmission component 23 is in the reverse state, so that the main controller 21 controls the inspection component 22 to stop generating X-rays.

[0074] In one illustrative embodiment, the control loop 11 is implemented using a programmable logic controller (PLC).

[0075] In another illustrative embodiment, the control loop 11 can also be implemented using a combination of intermediate relays and time relays.

[0076] The above logical judgments and operations can be implemented with only simple logic circuits, such as microcontrollers, PLCs, and CPUs. There is no need to design or develop corresponding software for them. Those skilled in the art can understand, implement, and reproduce them after reading the above technical solutions, so we will not go into too much detail here.

[0077] According to an embodiment of this utility model, the testing device 1 further includes a housing, within which the control circuit 11, rectifier circuit 14, switching switch 13, and the receiver 12 of the remote switch are all installed. The housing also contains a receiving space for accommodating the operating handle, which can be removed from the receiving space when in use. After testing, the operating handle can be returned to the receiving space for storage.

[0078] The embodiments of the present invention have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of the present invention is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the present invention, and all such substitutions and modifications should fall within the scope of the present invention.

Claims

1. A testing apparatus for use in X-ray inspection equipment, the X-ray inspection equipment comprising: Main controller; An inspection component is adapted to perform X-ray inspection within an inspection area under the control of the main controller; as well as The transfer component is suitable for transferring test packages in the feeding area, inspection area, and discharge area; The testing apparatus is characterized by comprising: The control loop is electrically connected to the inverters of the main controller and the transmission component, respectively; and A switch, electrically connected to the control loop, is used to start or stop the control loop and allow it to enter an automatic state. This allows the control loop to transmit a forward rotation signal to the inverter via the main controller and a reverse rotation signal to the inverter after a predetermined time interval. The inverter then drives the conveyor belt of the transmission component to rotate forward and reverse, repeatedly feeding and removing the test package into and out of the inspection area to test the degree of aging caused by X-rays on the test package.

2. The testing apparatus according to claim 1, characterized in that, Also includes: A remote switch includes an operating handle suitable for generating start / stop signals and a receiver communicatively connected to the operating handle, the receiver being electrically connected to the control loop; The control loop is also adapted to enter manual mode under the control of the remote switch, so as to transmit the forward rotation signal to the frequency converter via the main controller.

3. The testing apparatus according to claim 2, characterized in that, The switching switch includes: Stop contact; Automatic contacts are electrically connected to the control circuit; Manual contact, electrically connected to the receiving end; and A switching terminal, one end of which is configured to be selectively electrically connected to the stop contact, the automatic contact, or the manual contact, and the other end of which is electrically connected to one end of a DC power supply; The control circuit is connected to the other end of the DC power supply so that when the switching terminal is connected to the automatic contact, the control circuit is in the automatic state; when the switching terminal is connected to the manual contact, the control circuit is in the manual state; and when the switching terminal is connected to the manual contact, the control circuit is in a stopped state.

4. The testing apparatus according to claim 3, characterized in that, The control loop has; The first input terminal is electrically connected to the automatic contact; The second input terminal is electrically connected to the manual contact via the receiving terminal; The first output terminal is detachably connected to the main controller and is suitable for transmitting the forward rotation signal to the main controller. as well as The second output terminal is detachably electrically connected to the inverter and is suitable for transmitting the inversion signal to the inverter.

5. The testing apparatus according to claim 4, characterized in that, The X-ray inspection equipment consists of multiple units, and the control circuit has: Multiple first output terminals are detachably electrically connected to the main controllers of multiple X-ray inspection devices; and Multiple second output terminals are detachably electrically connected to the frequency converters of multiple X-ray inspection devices.

6. The testing apparatus according to any one of claims 1-5, characterized in that, Also includes: The rectifier circuit supplies power to the control circuit from an external DC power supply. The rectifier circuit is designed to prevent the DC power supply from supplying power to the control circuit if the positive and negative terminals of the DC power supply are reversed.

7. The testing apparatus according to claim 6, characterized in that, The rectifier circuit includes: A first diode, the anode of which is connected to the positive terminal of the DC power supply; The second diode has its cathode electrically connected to the cathode of the first diode; A third diode, the cathode of which is electrically connected to the anode of the second diode, and the cathode of the third diode is connected to the negative terminal of the DC power supply; and A fourth diode, wherein the anode of the fourth diode is electrically connected to the anode of the third diode, and the cathode of the fourth diode is electrically connected to the anode of the first diode; The cathode of the first diode serves as the first power supply terminal of the rectifier circuit, and the anode of the third diode serves as the second power supply terminal of the rectifier circuit, so as to supply power to the control circuit through the first power supply terminal and the second power supply terminal.

8. The testing apparatus according to any one of claims 1-5, characterized in that, The control loop is implemented using a programmable logic controller.

9. The testing apparatus according to any one of claims 1-5, characterized in that, The X-ray inspection equipment also includes: The detection component, electrically connected to the main controller, is installed at the entrance between the feeding area and the inspection area. The main controller, in response to the detection component detecting a detection signal that the test package has entered the inspection area, causes the inspection component to generate the X-ray.

10. The testing apparatus according to claim 9, characterized in that, The control loop is also adapted to transmit a stop signal to the master controller when the transmission component is in the reverse state, so that the master controller controls the inspection component to stop generating the X-rays.

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