TWM637866U - Simulation test device for sensor - Google Patents

Abstract

A sensor simulation test device is used to test the signal transmission status of a plurality of sensors, and the simulation test device includes a plurality of test ports, a simulation device and a communication port. The test port is correspondingly coupled to the control device of the sensor, and the simulation device is coupled to the test port. The simulation device provides a plurality of analog signals to corresponding test ports, so that the control device provides a plurality of transmission signals correspondingly based on the analog signals. The communication port is coupled to the test port and the management device, and the control device communicates with the management device through the communication port, so that the management device can know the signal transmission status of the control device. Wherein, the analog signal is the signal received by the analog sensor during actual operation.

Description

Analog test setup for sensors

The invention relates to a simulation test device, especially a sensor simulation test device.

Sensors such as temperature, liquid level, and flow usually have wired or wireless communication function outputs, and are generally tested with a single host and multiple sensors for system integration programming. This method will limit the program designer to a simple sequential communication test, and it cannot simulate the simultaneous communication of multiple gateways (Gateway) or the actual measurement of various functions such as communication speed format, lock code, etc. during design. It often happens that after the program design is completed, the problem is discovered when it is actually used on site, and the program must be modified or rewritten to meet the current needs.

In terms of product sales needs, when customers need to do system function tests, most customers cannot buy multiple units at a time for connection testing, and can only simply test with prototypes. After purchasing multiple gateways (Gateway) to synchronize communication or communication speed format and code lock, it was discovered that the system could not perform normally. At this time, both the manufacturer and the customer start to develop a solution, resulting in a waste of communication time between the two parties, or abandoning the use of the system due to the inability to communicate with the system, and more seriously, communication errors cause irreparable losses.

In order to test the connection function of the traditional sensor, it is necessary to produce multiple finished products, and then connect one by one to test the connection in sequence. If there is any problem, all the sensors must be removed and the circuit or program must be re-modified, resulting in a waste of time or materials. waste. This creation designs a sensor simulation test device to ensure that the control device of each sensor is actually operated after the actual installation, avoiding the situation of having to check one by one due to problems in signal transmission conditions. A major subject of research that the author of this case wanted to do.

In order to solve the above problems, the present invention provides a sensor simulation testing device to overcome the problems of the prior art. Therefore, the simulation test device of the present invention is used to test the signal transmission status of a plurality of sensors, and includes a plurality of test ports, a simulation device, a communication port and a power module. The plurality of test ports are correspondingly coupled to the control device of the sensor. The simulation device is coupled to the test port and provides a plurality of analog signals to the corresponding test port, so that the control device provides a plurality of transmission signals correspondingly based on the simulation signal. The communication port is coupled to the test port and the management device, and the control device communicates with the management device through the communication port, so that the management device can know the signal transmission status of the control device. The power supply module is used to supply power to the analog test device, and is selectively powered by a battery or an external power supply. Wherein, the analog signal is the signal received by the analog sensor during actual operation.

In one embodiment, the analog test device further includes an expansion port, which is used to couple to a communication port of another analog test device to form a serial analog test system with the management device.

In one embodiment, the simulation test device further includes an encryption and decryption device, which is coupled to the test port, and encrypts/decrypts the transmission signal and the signal provided by the management device; the encryption and decryption device uses non-plain code as encryption/decryption , and the encryption/decryption is selected from at least one of HEX hexadecimal code, Harsh Function, symmetric key and asymmetric key.

In one embodiment, the analog test device further includes a plurality of controllable switches, the controllable switches are coupled to the test port, and can selectively pre-define the coupling relationship between the test port and the communication port to be turned on or off. Wherein, the switch is selected from at least one of relays, transistors and coaxial switches.

In one embodiment, the sensor is a wired sensor, and the control device of the sensor is coupled to the test port through a wired connection; or, the sensor is a wireless sensor, and the sensor The control device of the tester is coupled to the test port through wireless transmission; or, the sensor is a wired sensor or a wireless sensor.

In one embodiment, the control device of the sensor is used to sense the state of the material flow, and the analog signal provided by the simulation device is to simulate the flow rate of the material flow, the total flow rate of the material flow and/or the direction of the material flow, And the material flow is simulated through the pulse wave signal of a specific frequency; the material flow can be the flow of solid particles, liquid or gas.

In one embodiment, the control device of the sensor is used to sense the status of the material inventory, and the simulation device includes a plurality of simulation modules, and the simulation modules are correspondingly coupled to the test ports to provide analog signals to corresponding the test port.

In one embodiment, each analog module includes a capacitor group, and the capacitor group includes a plurality of capacitor control modules, each capacitor control module is coupled in parallel and includes capacitors and switches in series. Wherein, each analog module controls whether the switch of the capacitance control module is turned on or not to adjust the capacitance value, so as to simulate the material level signal of the material stock through the change of the capacitance value.

In one embodiment, each analog module includes a plurality of temperature sensors and a plurality of heaters, the plurality of temperature sensors are coupled in series, and the plurality of heaters are coupled in series. Among them, each simulation module controls the heating of the heater, and affects the ambient temperature around the temperature sensor through the heating of the heater, and the temperature sensor senses the ambient temperature of the surrounding respectively to simulate the temperature signal of the material inventory.

In one embodiment, each analog module includes a plurality of humidity sensors, and the plurality of humidity sensors are coupled in series. Wherein, each simulation module simulates the humidity signal of the material inventory by adjusting the humidity parameter value of the humidity sensor.

The main purpose and function of this creation is to pre-test the signal transmission status between each control device and management equipment by providing analog signals through the simulation test device, so as to ensure that the control device of each sensor can be installed and operated in practice. Avoid the situation that you have to check one by one due to problems in signal transmission.

In order to further understand the technology, means and effects of this creation to achieve the intended purpose, please refer to the following detailed description and drawings about this creation. For specific understanding, however, the attached drawings are only for reference and illustration, and are not used to limit the creation.

100: Simulation test device

1. 1-1~1-N: Control device

12: Sensing line

122: Sensing unit

2-1~2-N: Test port

3: Simulator

321~32N: Analog module

34: capacitor bank

C: Capacitance

SW: switch

36: Temperature sensor

38: heater

40: Humidity sensor

42: Second controllable switch

44: Expansion module

4: Communication port

5: Expansion port

6: Encryption and decryption device

7: Power module

72: battery

74:Converter

200: Manage equipment

300: material inventory

302: material

Sa1~SaN: Analog signal

St1~StN: Transmission signal

SW1~SWN: the first controllable switch

Vin: external power supply

Fig. 1 is the circuit block diagram of the analog testing device of the inventive sensor; Fig. 2 is the circuit block diagram of the first embodiment of the analog testing device of the inventive sensor; Fig. 3A is the analog testing device of the inventive sensor The circuit block diagram of the second embodiment; FIG. 3B is a circuit block diagram of the analog module of the invention; and FIG. 4 is a schematic diagram of the sensor configuration for the material inventory of the invention.

Hereby, the technical content and detailed description of this creation are described as follows with the drawings: Please refer to Figure 1 for the circuit block diagram of the analog test device for the sensor of this creation. The sensor simulation test device 100 is coupled to the management device 200 and is used to test the signal transmission status of a plurality of sensors and the management device 200 . Specifically, the simulation test device 100 includes a plurality of test ports 2 - 1 - 2 - 8 , a simulation device 3 and a communication port 4 . The test ports 2-1~2-8 are correspondingly coupled to the sensor control devices 1-1~1-8, and the simulation device 3 is coupled to the test ports 2-1~2-8. The simulation device 3 provides a plurality of analog signals Sa1~Sa8 to the corresponding test ports 2-1~2-8, so that the control devices 1-1~1-8 provide a plurality of transmission signals correspondingly based on the received analog signals Sa1~Sa8 St1~St8 are connected to the test ports 2-1~2-8, so as to perform a simulation test on the sensor control devices 1-1~1-8. The communication port 4 is coupled to each test port 2-1~2-8 and the management device 200, and the control device 1-1~1-8 communicates with the management device 200 through the communication port 4 to know that the management device Signal transmission status between the management device 200 and the control devices 1-1~1-8. Among them, the signal transmission status refers to the connection transmission quality between the management device 200 and the control devices 1-1~1-8, the accuracy of the value transmission of both parties, and whether there is a program gap in the process of the mutual transmission of the two programs. Vulnerabilities (BUG) and other conditions.

Taking the sensor as an example of a flow rate sensor, the flow rate sensor (ie flow meter) usually includes a pipeline, a wheel and a control device. In the actual operation of the flow sensor, when the water flows through the pipeline to drive the water wheel, the control device can usually know the flow velocity and direction of the water flow through sensing, and transmit the flow velocity and direction to the gateway (Gateway) and other back-end devices. In actual operation, the flow rate sensor is usually arranged, for example but not limited to, on the top floor of each building, and is connected to a remote gateway or management device 200 in a wired or wireless manner. However, in the actual system configuration, when each flow velocity sensor is installed, it is necessary to test the connection transmission quality between the management equipment 200 and the control devices 1-1~1-8 one by one, and even if the test is completed, it can be connected with the management equipment. After 200 transfer data to each other, when the whole system is in operation, there will be additional transmission problems due to the simultaneous operation of the whole system. For example, but not limited to, the entire system is paralyzed due to the large size of the transmitted packet, or the data transmission is crowded out. These problems have to wait until the whole system is in operation, and then have to go to the installation location of the opportunity to check one by one, causing a lot of inconvenience.

Among them, the sensor control devices 1-1~1-8 are used to sense the state of the material flow, and the analog signals Sa1~Sa8 provided by the simulation device 3 are the flow velocity of the simulated material flow, the total flow rate of the material flow and/or Or the direction of the material flow, and simulate the material flow by, for example but not limited to, a pulse wave signal of a specific frequency. The flow of matter can be the flow of solid particles, liquids or gases. Therefore, the main purpose and function of this creation is to pre-test the signal transmission status between each control device 1-1-1-8 and the management device 200 by providing analog signals Sa1~Sa8 through the analog test device 100, so as to ensure that each During the actual operation of the control devices 1-1 to 1-8 after the actual installation, it is necessary to avoid checking one by one due to problems in signal transmission. Wherein, taking the above-mentioned sensor as a flow rate sensor as an example, the simulation device 3 provides The analog signals Sa1~Sa8 can simulate the signals received by the flow velocity sensor during actual operation, that is, the received signals can be signals corresponding to the flow velocity or direction of the water flow.

Referring again to FIG. 1 , the analog test device 100 further includes an expansion port 5 , and the expansion port 5 is used to couple to the communication port 4 of another analog test device 100 to form a cascaded analog test system with the management device 200 . Preferably, the analog test device 100 may include, for example but not limited to, 8 groups of test ports 2-1~2-8, and each group of test ports 2-1~2-8 may be coupled to a control device 1-1~1- 8. Usually, in a small sensing system (such as but not limited to a single building), sensors are usually configured in less than 8 groups, and a single group of simulation test devices 100 can be used to complete the pre-test of the small sensing system. However, in a relatively large sensing system (such as but not limited to the entire factory area), sensors are usually configured in more than 8 groups, so use the expansion port 5 to connect another analog test device 100 in series to expand to more than 8 groups The control devices 1-1~1-8 are used to test the system.

On the other hand, the simulation testing device 100 further includes a plurality of first controllable switches SW1 - SW8 , and the on/off of the first controllable switches SW1 - SW8 can be controlled manually or by the management device 200 . The first controllable switches SW1 - SW8 are coupled to the test ports 2 - 1 - 2 - 8 , and selectively turn on or off the coupling relationship between the test ports 2 - 1 - 2 - 8 and the communication port 4 . Specifically, when some of the test ports 2-1~2-8 of the simulation test device 100 are not coupled to the control devices 1-1~1-8, or a certain control device 1-1~1-8 fails, Or when you want to exclude the test of a control device 1-1~1-8, you can turn off the corresponding first controllable switches SW1~SW8 manually or controlled by the management device 200, so as to avoid testing in the simulation test device 100. In the test of the signal transmission status, it is affected by these test ports 2-1~2-8 (such as but not limited to the possibility of mistransmitting signals, or transmitting wrong signals, etc.).

In addition, the simulation test device 100 may also include an encryption and decryption device 6 . The encryption and decryption device 6 is coupled to the test ports 2-1~2-8, and provides an encryption/decryption conversion mechanism of a specific data transmission format, so as to perform encryption conversion before the transmission signals St1~St8 are provided to the communication port 4, and in the management When the device 200 provides signals to the control devices 1-1~1-8, the signals are decrypted and converted. Among them, the encryption and decryption device 6 except It can be arranged not only at the position shown in FIG. 1 , but also at each test port 2-1~2-8 (that is, multiple decryption devices 6). In addition, the encryption/decryption device 6 uses non-plain code as the encryption/decryption, and the encryption/decryption can be selected from at least one of HEX hexadecimal code, Harsh Function, symmetric key and asymmetric key. The encryption and decryption device 6 is mainly to meet the special data transmission format requirements of each manufacturer, so as to prevent the data transmitted by the system set up by each manufacturer from being stolen during the actual operation of the sensor and the management device 200 . Therefore, the encryption/decryption switching status of the sensor and management device 200 can be tested in advance by the encryption and decryption device 6 .

Further, the simulation testing device 100 may further include a power supply module 7 for supplying power to the simulation testing device 100 . The power supply module 7 is coupled to the test ports 2-1~2-8 and the simulation device 3, and may include a battery 72 for power supply or an external power supply Vin, and optionally, when the external power supply Vin is used for power supply, a conversion Converter 74 converts the external power supply Vin into suitable power. Since the simulation test device 100 of the present invention can be powered by the battery 72, it is not limited by the power distribution of the test field, and the simulation test of the control devices 1-1~1-8 can be started as long as a suitable placement is found.

It is worth mentioning that in one embodiment of the present invention, the sensors used in the control devices 1-1 to 1-8 may be wired sensors or wireless sensors. When the control devices 1-1-1-8 are applied to wired sensors, the control devices 1-1-1-8 are coupled to the test ports 2-1-2-8 through a wired connection. When the control devices 1-1-1-8 are applied to wireless sensors, the control devices 1-1-1-8 are coupled to the test ports 2-1-2-8 through wireless transmission. Similarly, the test ports 2-1 to 2-8 can also be coupled to the management device 200 in a wired or wireless manner, which can be selected based on user requirements.

Please refer to FIG. 2 , which is a circuit block diagram of the first embodiment of the analog testing device for the sensor of the present invention, and refer to FIG. 1 for the combination. In the embodiment of FIG. 2 , the sensors are used to sense the state of the water flow, and the control devices 1 - 1 - 1 - 8 of the sensors are used to receive signals corresponding to the flow velocity and the direction of the water flow. Specifically, the simulation device 3 includes a plurality of simulation modules 321 - 328 . The analog modules 321-328 are correspondingly coupled to the test ports 2-1-2-8, so as to respectively provide analog signals Sa1-Sa8 to the corresponding test ports 2-1-2-8. because Here, the simulation modules 321-328 of the simulation device 3 respectively provide analog signals Sa1-Sa8 to the test ports 2-1-2-8, and the analog signals Sa1-Sa8 simulate the flow velocity and/or the direction of the water flow. Taking the flow velocity of the water flow as an example, the simulation modules 321-328 simulate the flow velocity of the water flow through pulse signals of specific frequencies (ie, the analog signals Sa1-Sa8). After the control device 1-1~1-8 receives the pulse wave signal of a specific frequency, based on the pulse wave signal, it provides the transmission signal St1~St8 to the test port 2-1~2-8 respectively, so as to pass the test port 2-1~ The path from 2-8 to the communication port 4 provides the transmission signals St1-St8 to the management device 200, so as to know the signal transmission status between the test ports 2-1-2-8 and the management device 200. Therefore, the control devices 1-1~1-8 communicate with the management device 200 through the communication port 4, and can know the signal transmission status between the management device 200 and the control devices 1-1~1-8.

Please refer to FIG. 3A , which is the circuit block diagram of the second embodiment of the analog test device for the inventive sensor, and FIG. 3B , which is the circuit block diagram of the inventive analog module. For the combination, refer to FIG. 1 . In the embodiment shown in FIGS. 3A-3B , the sensors are used to sense the status of the material inventory, and the control devices 1 - 1 - 1 -N of the sensors are used to receive signals corresponding to the status of the material inventory. Sensors for Material Inventory As shown in FIG. 4 , the material inventory 300 can be equipped with single or multiple multifunctional composite sensors to sense the status of the material 302 . A multifunctional composite sensor generally includes a control device 1 and a sensing circuit 12 . The sensing circuit 12 includes a plurality of sensing units 122 . Each sensing unit 122 can sense the temperature and humidity of the material stock, and can also sense the material level of the material stock through the linear change of the physical quantity. The simulation modules 321~32N mainly provide signals of the temperature, humidity and material level of the simulated material inventory to test the signal transmission status of the control devices 1-1~1-N of the multifunctional composite sensor. It is worth mentioning that in one embodiment of the present invention, the other components not shown in FIGS. 3A-3B or not further described are the same as those in FIG. 2 , and will not be repeated here.

Specifically, each of the analog modules 321 - 32N includes a capacitor bank 34 . Each capacitor group 34 is correspondingly coupled to each test port 2 - 1 - 2 -N, and includes a plurality of capacitor control modules. Each capacitor control module is coupled in parallel with each other and includes a capacitor C and a switch SW connected in series. 321~32N for each analog module Controlling the conduction of the switch SW of the capacitance control module adjusts the capacitance value, so as to provide the material level signals Sa1~SaN of simulating the material stock 300 through the change of the capacitance value. (i.e. analog signal)

Each analog module 321~32N can also include a plurality of temperature sensors 36 and a plurality of heaters 38, each temperature sensor 36 is coupled in series with each other, and the head end of the series connection is correspondingly coupled to each Test ports 2-1~2-N. Each heater 38 is also coupled to each other in series, and the head end of the series is correspondingly coupled to each test port 2 - 1 - 2 -N. Each of the analog modules 321 - 32N controls the heating of the heater 38 and affects the ambient temperature around the temperature sensor 36 through the heating of the heater 38 . The temperature sensor 36 respectively senses the ambient temperature to provide temperature signals Sa1˜SaN (ie analog signals) of the simulated material inventory 300 . Wherein, the number of heaters 38 may be different from the number of temperature sensors 36 . However, in actual testing, in order to simulate the temperature of the stock 300 more precisely, it is a better implementation to design the number of heaters 38 to be the same as the number of temperature sensors 36 and arrange them in parallel accordingly.

Each analog module 321~32N can also include a plurality of humidity sensors 40, each humidity sensor 40 is coupled in series with each other, and the head end of the series connection is correspondingly coupled to each test port 2-1~ 2-N. Each of the simulation modules 321 - 32N provides humidity signals Sa1 - SaN (that is, analog signals) for simulating the material inventory 300 by adjusting the humidity parameter value of the humidity sensor 40 . Specifically, the humidity parameter value can be a resistance value or a capacitance value, and the adjustment of the resistance value (or capacitance value) can simulate the size of the humidity, so the humidity signal Sa1~ of the simulated material stock 300 can be provided by changing the resistance value or the capacitance value. SaN. Wherein, the humidity of the material at the bottom and top of the material stock 300 is usually different, so in actual testing, two humidity sensors 40 can be used to simulate the humidity at the bottom and top of the material stock 300 . However, it is not limited thereto, the simulation modules 321 - 32N may also include more than two humidity sensors 40 to simulate the humidity change between the bottom and the top of the material stock 300 . Therefore, in summary, the analog signals Sa1˜SaN may represent at least one of a material level signal, a temperature signal, a humidity signal, and the like.

Each analog module 321~32N can also include a plurality of second controllable switches 42, and each second controllable switch 42 is connected in series with the temperature sensor 36 series, the heater 38 series and the humidity sensor respectively. 40 skewers and selectively turn on or off the coupling relationship between the series connectors of the temperature sensor 36 string, the heater 38 string and the humidity sensor 40 string and the test ports 2-1~2-N. When there is no need to carry out the simulation test of temperature, humidity or material level, the corresponding second controllable switch 42 can be turned off manually or controlled by the management device 200 (the simulation test of material level can be performed by turning off all switches SW ), so as to avoid being affected by these test ports 2-1~2-N (for example but not limited to possible mistransmission of signals, or transmission of wrong signals, etc.) Among them, the first controllable switches SW1~SW8 and the second controllable switch 42 can be a mixture of conventional relay (Relay) output control, transistor (PNP/NPN) output control and coaxial switch (SPDT/DPDT) control, etc. .

It is worth mentioning that in one embodiment of the present invention, each of the analog modules 321 - 32N may further include an expansion module 44 . Specifically, because in practical applications, the material stocks 300 vary in size and have different heights, the lengths of the sensing lines 12 are also different, and the sensing units 122 contained therein are also different. Therefore, the quantity of the capacitor bank 34 , the temperature sensor 36 , the heater 38 and the humidity sensor 40 can be expanded by expanding the module 44 , so as to adjust the quantity of the above-mentioned elements according to the length of the sensing circuit 12 .

All in all, this creation uses the concept of public boards to simultaneously design circuits with similar functions on one analog test device 100. Depending on the complexity of the circuit design, 6, 8 or more circuits can be integrated on one board. When users need to connect multiple devices, they only need one board or a combination of multiple boards to test various connection functions at the same time (such as but not limited to, RS-485, 232 or 4G, 5G, NBIoT and other multi-machine integration system communication connection). Therefore, this integrated system can be applied to integrated building water meters, various functional design tests, industrial 4.0 precision machining machines, program simulation tests of some instrumentation and control integrated systems, storage temperature monitoring, etc., using hundreds of sensor communication programs Design tests. Greatly shorten product development time and improve product quality.

If the manufacturer needs to provide the product to the customer for testing, it only needs to provide the customer with a public board for connection testing. If the function meets the customer's needs, the purchase can be carried out, avoiding the situation of inconvenient communication between the two parties when a problem occurs when a large number of products are purchased in the past for connection testing. Therefore the simulated test device of this creation 100. It is functional, innovative and novel for R&D testing of various industrial automation programming.

However, the above is only a detailed description and diagram of a preferred embodiment of this creation, but the characteristics of this creation are not limited to this, and are not used to limit this creation. The entire scope of this creation should be applied for as follows The scope of the patent shall prevail. All embodiments that conform to the spirit of the patent scope of this creation and its similar changes shall be included in the scope of this creation. Anyone who is familiar with this technology can easily think of it in the field of this creation. Changes or modifications can be covered by the scope of the following patents in this case.

100: Simulation test device

1-1~1-8: Control device

12: Sensing line

122: Sensing unit

2-1~2-8: Test port

3: Simulator

4: Communication port

5: Expansion port

6: Encryption and decryption device

7: Power module

72: battery

74:Converter

200: Manage equipment

300: material inventory

302: material

Sa1~SaN: Analog signal

St1~StN: Transmission signal

SW1~SWN: the first controllable switch

Vin: external power supply

Claims (10)

A sensor simulation test device is used to test a signal transmission status of a plurality of sensors, including: a plurality of test ports, correspondingly coupled to a control device of the sensors; a simulation device, coupled to The test ports provide a plurality of analog signals to the corresponding test ports, so that the control devices provide a plurality of transmission signals correspondingly based on the analog signals; a communication port is coupled to the test ports and a management device, And the control devices communicate with the management equipment through the communication port, so that the management equipment can know the signal transmission status of the control devices; and a power supply module, which is used to supply power to the simulation device and the test ports, And selectively powered by battery or external power supply; wherein, the analog signals simulate the signals received by the sensors during actual operation. The analog test device as described in claim 1 further includes: an expansion port for coupling the communication port of another analog test device to form a serial analog test system with the management device. The analog test device as described in claim 1 further includes: an encryption and decryption device, coupled to the test ports, and encrypts/decrypts the transmission signals and the signals provided by the management device; the encryption and decryption device Non-plain code is used as the encryption/decryption, and the encryption/decryption is selected from at least one of HEX hexadecimal code, Harsh Function, symmetric key and asymmetric key. The analog test device as described in claim 1, further comprising: a plurality of controllable switches, coupled to the test ports, and can selectively pre-define the connection relationship between the test ports and the communication port; Wherein, the switches are selected from at least one of relays, transistors, and coaxial switches. The analog test device as described in claim 1, wherein the sensors are wired sensors, and the control devices of the sensors are coupled to the test ports through a wired connection; or, the These sensors are wireless sensors, and the control devices of these sensors are coupled to the test ports through wireless transmission; or, these sensors are wired sensors or wireless sensor. The simulated test device as described in claim 1, wherein the control device of these sensors is used to sense the condition of a material flow, and the simulated signals provided by the simulated device are to simulate the flow rate of the material flow, the The total flow rate of the material flow and/or the direction of the material flow, and a specific frequency pulse wave signal is used to simulate the material flow; the material flow can be the flow of solid particles, liquid or gas. The simulation test device as described in claim 1, wherein the control device of these sensors is used to sense the condition of the stock of materials, and the simulation device includes: a plurality of simulation modules, which are correspondingly coupled to the test ports, These analog signals are correspondingly provided to corresponding test ports. The analog test device as described in claim 7, wherein each analog module includes: a capacitor group, including: a plurality of capacitor control modules, each capacitor control module is coupled in parallel with each other, and includes a capacitor connected in series and a switch; wherein, each analog module controls whether the switches of the capacitance control modules are turned on or not to adjust the capacitance value, so as to simulate the material level signal of the material stock through the change of the capacitance value. The analog test device as described in claim 7, wherein each analog module includes: a plurality of temperature sensors, coupled in series; and a plurality of heaters, coupled in series; Wherein, each analog module is to control the heating of the heaters, and the heating of the heaters affects the ambient temperature around the temperature sensors, and the temperature sensors respectively sense the ambient temperature and Simulate the temperature signal of the material inventory. The analog test device as described in claim 7, wherein each analog module includes: a plurality of humidity sensors, which are coupled in series with each other; wherein each analog module adjusts the humidity of these humidity sensors parameter value to simulate the humidity signal of the material inventory.

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