Inertial device heating alarm test control system

Abstract

The invention discloses a heating alarm test control system for an inertial device, and the system is provided with a temperature detection circuit which is used for carrying out the real-time detection of the working environment temperature in the performance test process of the inertial device, and transmits a temperature signal detected by the temperature detection circuit to a heating alarm mode switching circuit. According to the temperature condition of the inertial device, the heating and heating alarm mode switching circuit utilizes different heating power supplies to carry out rapid heating or constant temperature control on a heating sheet so as to change the working temperature of the inertial device, and when the working temperature of the inertial device is too high, the heating and heating alarm mode switching circuit can also send out a high-temperature alarm signal. And meanwhile, the connection between the heating sheet and the heating power supply is cut off in time, so that the inertial device cannot work in an abnormal high-temperature state even if the temperature control module breaks down, the protection of the inertial device is not influenced by the fault of the temperature control module, the service life of the inertial device is ensured, and the safety of the inertial device performance test system is also improved.

Description

Technical Field

[0001] The invention relates to the technical field of ship navigation equipment, and in particular to an inertial device heating alarm test control system. Background Art

[0002] In the field of navigation, the platform compass is a navigation device that works based on the principle of the inertial device - the gyro characteristic. It can continuously, reliably and in real time provide users with the ship's heading angle and horizontal attitude information to ensure navigation safety. It is a navigation device that ensures the navigation of ships. The platform compass is generally based on inertial devices. After the inertial device, such as the liquid floating gyroscope, is assembled, it must be tested and evaluated for performance, and can only be used on the platform compass after it is determined to be qualified.

[0003] Each gyroscope needs to go through some fixed process test items to complete the performance measurement, and the measurement process is often cumbersome, with many test items, and it takes a lot of test time. The liquid-floating gyroscope is a precision device filled with liquid. Before the performance test, the preparation time is long. It needs to be heated for a long time under the control of the temperature control module to reach the gyroscope temperature before the test equipment can be started. At the same time, the gyroscope is expensive and has high precision. It is a life-long part. During the test, the gyroscope needs to complete the performance measurement under constant temperature control. If the temperature control module fails during the test, causing loss of control and causing large temperature fluctuations, or if it works in an abnormally high temperature state for a long time without timely discovery or intervention, the gyroscope is very easy to be damaged, and in severe cases, it will cause irreparable damage. Summary of the invention

[0004] In view of this, the present invention provides an inertial device heating alarm test control system, which can cut off heating in time if the operating temperature of the inertial device is too high during the inertial device performance test, and will not be affected by the failure of the temperature control module, thereby improving the safety of the inertial device performance test system.

[0005] An inertial device heating alarm test control system, comprising a heating plate, a temperature detection circuit, a heating alarm mode switching circuit, a temperature control module and a high temperature signal acquisition alarm circuit;

[0006] The heating sheet is arranged on the inertial device and is used to heat the working environment temperature during the performance test of the inertial device;

[0007] The output end of the temperature detection circuit is connected to the input end of the heating alarm mode switching circuit, and is used to detect the working environment temperature during the inertial device performance test in real time and transmit the detected temperature signal to the heating alarm mode switching circuit;

[0008] The output end of the heating alarm mode switching circuit is connected to the heating plate and the high temperature signal acquisition alarm circuit, and is used to control the switching of the heating or alarm mode according to the received temperature signal. When in the heating mode, different heating power supplies are provided according to the temperature to heat the heating plate to change the working temperature of the inertial device. When in the alarm mode, a high temperature signal is sent to the high temperature signal acquisition alarm circuit;

[0009] The temperature control module is used to control the working temperature of the inertial device during the heating process of the heating plate;

[0010] The high temperature signal acquisition alarm circuit is used to acquire high temperature signals and send the high temperature signals to the controller, and the controller issues an alarm prompt based on the received signals.

[0011] Preferably, the heating alarm mode switching circuit comprises a voltage reference circuit, a heating mode switching circuit and a heating alarm switching circuit, one output end of the voltage reference circuit is connected to the input end of the temperature detection circuit, the other output end is respectively connected to one input end of the heating mode switching circuit and one input end of the heating alarm switching circuit, the other input end of the heating mode switching circuit and the other input end of the heating alarm switching circuit are both connected to the output end of the temperature detection circuit;

[0012] The voltage reference circuit is used to provide a reference voltage;

[0013] The heating mode switching circuit is used to control the heating mode of the heating plate according to the received temperature signal and the reference voltage, and provide corresponding heating power to the heating alarm switching circuit according to the heating mode;

[0014] The heating alarm switching circuit is used to control the switching of the heating or alarm mode according to the received temperature signal. When in the heating mode, the heating power provided by the heating mode switching circuit is used to heat the heating plate to change the working temperature of the inertial device. There is at least one heating mode in the heating mode; when in the alarm mode, a high temperature signal is sent to the high temperature signal acquisition alarm circuit.

[0015] Preferably, the heating alarm switching circuit includes a high temperature sampling isolation module, a heating alarm drive control module, and a heating switching module.

[0016] The high temperature sampling isolation module is used to send a heating signal to the heating alarm drive control module or send a high temperature signal to the high temperature signal acquisition alarm circuit according to the received temperature signal and reference voltage, so as to switch the heating or alarm mode;

[0017] The heating alarm drive control module is used to control the heating switching module to switch the heating state or the non-heating state according to the received heating signal.

[0018] Preferably, when the temperature detection circuit detects that the current working environment temperature of the inertial device is within the first temperature range, the high temperature sampling isolation module sends a heating signal to the heating alarm drive control module, and the heating alarm drive control module controls the heating switching module to switch to the heating state. The heating switching module quickly heats the heating plate under the first heating power provided by the heating mode switching circuit to increase the working temperature of the inertial device;

[0019] When the temperature detection circuit detects that the current working environment temperature of the inertial device is within the second temperature range, the high temperature sampling isolation module sends a heating signal to the heating alarm drive control module, and the heating alarm drive control module controls the heating switching module to maintain the heating state. The heating switching module performs normal heating on the heating plate under the second heating power provided by the heating mode switching circuit to further increase the working temperature of the inertial device;

[0020] When the temperature detection circuit detects that the current working environment temperature of the inertial device is within the third temperature range, the high temperature sampling isolation module sends a high temperature signal to the high temperature signal acquisition alarm circuit, and the high temperature signal acquisition alarm circuit sends the high temperature signal to the controller. The controller issues an alarm prompt based on the received signal. At the same time, the high temperature sampling isolation module sends a no heating signal to the heating alarm drive control module. The heating alarm drive control module controls the heating switching module to switch to the no heating state based on the received signal, and stops heating the heating plate.

[0021] Preferably, the high temperature sampling isolation module includes an operational amplifier N2, an adjustable potentiometer RP3, a transistor Q1 and a photocoupler U1, the inverting input terminal of the operational amplifier N2 is connected to one of the output terminals of the voltage reference circuit, the non-inverting input terminal is connected to the sliding terminal of the adjustable potentiometer RP3, one of the fixed terminals of the adjustable potentiometer RP3 is grounded, and the other fixed terminal is connected to the output terminal of the temperature detection circuit, the output terminal of the operational amplifier N2 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is grounded, and the collector is connected to the negative electrode of the photosensitive diode of the photocoupler U1, and the photosensitive transistor of the photocoupler U1 is connected to the heating alarm drive control module.

[0022] Preferably, the high temperature signal acquisition alarm circuit includes a photoelectric coupler U2, a fixed resistor R10, and a fixed resistor R11. The cathode of the photosensitive diode of the photoelectric coupler U2 is connected to the anode of the photosensitive diode of the photoelectric coupler U1, the anode of the photosensitive diode of the photoelectric coupler U2 is connected to the first power supply, the collector of the phototransistor of the photoelectric coupler U2 is connected to the fourth power supply, and the emitter is connected to one end of the fixed resistor R10. The other end of the fixed resistor R10 is respectively connected to one end of the fixed resistor R11 and the signal input end of the controller, and the other end of the fixed resistor R11 is grounded.

[0023] Preferably, the heating alarm drive control module includes a fixed resistor R6, a fixed resistor R7, a fixed resistor R8, and a transistor Q3. One end of the fixed resistor R6 is connected to one end of the fixed resistor R7 and then connected to the collector of the phototransistor of the photoelectric coupler U1. The other end of the fixed resistor R6 is connected to the first power supply. The other end of the fixed resistor R7 is connected to the base of the transistor Q3. The emitter of the transistor Q3 and the emitter of the phototransistor of the photoelectric coupler U1 are grounded together. The collector of the transistor Q3 is connected to the fixed resistor R8. The other end of the fixed resistor R8 is connected to the first power supply. The connection node between the collector of the transistor Q3 and the fixed resistor R8 is connected to the heating switching module as an output.

[0024] Preferably, the heating switching module includes a fixed resistor R9, a transistor Q4, a relay J1, and a diode D1. One end of the fixed resistor R9 is connected to the connection node between the collector of the transistor Q3 and the fixed resistor R8, and the other end of the fixed resistor R9 is connected to the base of the transistor Q4. The emitter of the transistor Q4 is grounded, and the collector is connected to one end of the coil of the relay J1. The other end of the coil of the relay J1 is connected to the second power supply. The diode D1 is connected in parallel with the coil of the relay J1. The contact switch of the relay J1 is a double-pole double-throw switch and its common end is connected to the heating mode switching circuit, and the normally closed end is connected to the heating plate.

[0025] Preferably, the heating mode switching circuit includes an operational amplifier N2', an adjustable potentiometer RP4, a transistor Q2, a relay J2, and a diode D2. The non-inverting input terminal of the operational amplifier N2' is connected to the inverting input terminal of the operational amplifier N2, and the inverting input terminal is connected to the sliding terminal of the adjustable potentiometer RP4. One of the fixed terminals of the adjustable potentiometer RP4 is grounded, and the other fixed terminal is connected to the output terminal of the temperature detection circuit. The output terminal of the operational amplifier N2' is connected to the base of the transistor Q2, the emitter of the transistor Q2 is grounded, and the collector is connected to one end of the coil of the relay J2, and the other end of the coil of the relay J2 is connected to the third power supply. The diode D2 is connected in parallel with the coil of the relay J2. The contact switch of the relay J2 is a double-pole double-throw switch and its common terminal is connected to the common terminal of the contact switch of the relay J1, the normally closed terminal is connected to the first heating power supply, and the normally open terminal is connected to the second heating power supply.

[0026] Preferably, the temperature detection circuit includes a thermistor, an H-bridge differential circuit, an operational amplifier N1, and an integration circuit arranged in the inertial device. One end of the thermistor is grounded and the other end is connected to one of the input ends of the H-bridge differential circuit. The other input end of the H-bridge differential circuit is connected to the voltage reference circuit. The two output ends of the H-bridge differential circuit are respectively connected to the inverting input end and the non-inverting input end of the operational amplifier N1. The output end of the operational amplifier N1 connects the output back to the inverting input end through the integration circuit, and the output end of the operational amplifier N1 serves as the output end of the circuit.

[0027] Preferably, the voltage reference circuit includes a voltage reference source, a fixed resistor R4 and a fixed resistor R5, one of the output ends of the voltage reference source is connected to the input end of the temperature detection circuit, and the other output end is connected to the fixed resistor R4, the fixed resistor R5 is connected in series with the fixed resistor R4 and then grounded, and the connection node between the fixed resistor R5 and the fixed resistor R4 serves as the output of the circuit.

[0028] Preferably, the integration circuit includes an adjustable potentiometer RP2, or the integration circuit includes a fixed resistor and a capacitor connected in parallel.

[0029] The beneficial effects of the present invention are:

[0030] The present invention provides a temperature detection circuit for real-time detection of the working environment temperature during the performance test of the inertial device, and transmits the temperature signal detected by the temperature detection circuit to the heating alarm mode switching circuit. The heating alarm mode switching circuit uses different heating power supplies to quickly heat or control the heating plate of the inertial device according to the temperature of the inertial device to change the working temperature of the inertial device. When the working temperature of the inertial device is too high, the heating alarm mode switching circuit can also send a high-temperature alarm signal and timely cut off the connection between the heating plate and the heating power supply. Even if the temperature control module fails, the inertial device will not work in an abnormal high temperature state. The protection of the inertial device will not be affected by the failure of the temperature control module, thereby ensuring the service life of the inertial device and improving the safety of the inertial device performance test system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. 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 paying creative work.

[0032] Figure 1 It is one of the circuit diagrams of the inertial device heating alarm test control system.

[0033] Figure 2 yes Figure 1 Schematic diagram of the contacts of relays J1 and J2 in the medium-fast heating mode.

[0034] Figure 3 yes Figure 1 Schematic diagram of the contacts of relays J1 and J2 in normal heating mode.

[0035] Figure 4 yes Figure 1 Schematic diagram of the contacts of relays J1 and J2 in medium and high temperature alarm mode.

[0036] Figure 5 This is the second circuit diagram of the inertial device heating alarm test control system. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0038] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0039] It should be understood that although the terms first, second, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms and should not be understood as indicating or implying relative importance. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0040] In order to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings.

[0041] Embodiment 1, the present invention provides an inertial device heating alarm test control system, including a heating plate, a temperature detection circuit, a heating alarm mode switching circuit, a temperature control module and a high temperature signal acquisition alarm circuit.

[0042] The heating sheet is arranged on the inertial device and is used to heat the working environment temperature during the performance test of the inertial device;

[0043] The output end of the temperature detection circuit is connected to the input end of the heating alarm mode switching circuit, and is used to detect the working environment temperature during the inertial device performance test in real time and transmit the detected temperature signal to the heating alarm mode switching circuit;

[0044] The output end of the heating alarm mode switching circuit is connected to the heating plate and the high temperature signal acquisition alarm circuit, and is used to control the switching of the heating or alarm mode according to the received temperature signal. When in the heating mode, different heating power supplies are provided according to the temperature to heat the heating plate to change the working temperature of the inertial device. When in the alarm mode, a high temperature signal is sent to the high temperature signal acquisition alarm circuit;

[0045] The temperature control module is used to control the working temperature of the inertial device during the heating process of the heating plate;

[0046] The high temperature signal acquisition alarm circuit is used to acquire high temperature signals and send the high temperature signals to the controller, and the controller issues an alarm prompt based on the received signals.

[0047] Specifically, the heating alarm mode switching circuit includes a voltage reference circuit, a heating mode switching circuit and a heating alarm switching circuit. One output end of the voltage reference circuit is connected to the input end of the temperature detection circuit, and the other output end is respectively connected to one of the input ends of the heating mode switching circuit and one of the input ends of the heating alarm switching circuit. The other input end of the heating mode switching circuit and the other input end of the heating alarm switching circuit are both connected to the output end of the temperature detection circuit, the output end of the heating mode switching circuit is connected to the heating alarm switching circuit, the heating alarm switching circuit is connected to the heating plate, and the temperature control module is connected to the heating plate.

[0048] The voltage reference circuit is used to provide a reference voltage for the temperature detection circuit, the heating mode switching circuit, and the heating alarm switching circuit. The temperature detection circuit detects the working environment temperature of the inertial device in real time and transmits the detected temperature signal to the heating mode switching circuit and the heating alarm switching circuit respectively.

[0049] The heating mode switching circuit is used to control the heating mode of the heating plate according to the received temperature signal and the reference voltage, and provide the corresponding heating power supply to the heating alarm switching circuit according to the heating mode. At least one heating mode can be set. In each heating mode, the power supply voltage for heating the heating plate is different, so that the heating plate can be heated to different degrees, that is, the heating mode refers to the degree of heating or the heating rate of the heating plate.

[0050] The heating alarm switching circuit is used to control the switching of the heating or alarm mode according to the received temperature signal and the reference voltage. The heating mode refers to whether the heating plate is heated (the mode includes two states, a heating state or a non-heating state. When the heating alarm switching circuit is switched to the heating mode, it indicates that the heating plate enters the heating state. When the heating alarm switching circuit is switched to the alarm mode, it enters the alarm state and the heating plate is in a non-heating state). After adjusting to the heating mode, the heating rate for heating the heating plate can be selected according to the current working environment temperature of the inertial device, that is, the heating mode is selected. At least one heating mode is provided in the heating mode.

[0051] When the temperature detection circuit detects that the current working environment temperature of the inertial device is lower than the set temperature, the heating mode switching circuit selects a heating mode for heating the heating plate according to the temperature, thereby providing a corresponding heating power supply to the heating alarm switching circuit. At the same time, the heating alarm switching circuit controls the entry into the heating mode according to the temperature, and uses the heating power provided by the heating mode switching circuit to heat the heating plate to change the working temperature of the inertial device. During the heating process of the heating plate, the temperature control module controls the working temperature of the inertial device;

[0052] When the temperature detection circuit detects that the current working environment temperature of the inertial device exceeds the set temperature, the heating alarm switching circuit controls the alarm mode according to the temperature conditions and sends a high temperature signal to the high temperature signal acquisition alarm circuit. The high temperature signal acquisition alarm circuit collects the high temperature signal and sends the collected high temperature signal to the controller. The controller issues an alarm prompt based on the received signal. The alarm prompt includes but is not limited to voice prompt, sound and light alarm, and display alarm.

[0053] Embodiment 2. In this embodiment, the inertial device heating alarm test control system of the present invention also includes a heating plate, a temperature detection circuit, a heating alarm mode switching circuit, a temperature control module and a high temperature signal acquisition alarm circuit. The functions of the heating plate, the temperature detection circuit, the heating alarm mode switching circuit, the temperature control module and the high temperature signal acquisition alarm circuit are the same as those of Embodiment 1. The specific difference is that the heating alarm switching circuit includes a high temperature sampling isolation module, a heating alarm drive control module and a heating switching module.

[0054] The high temperature sampling isolation module is used to send a heating signal to the heating alarm drive control module or a high temperature signal to the high temperature signal acquisition alarm circuit according to the received temperature signal and reference voltage to switch the heating or alarm mode.

[0055] The heating alarm drive control module is used to control the heating switching module to switch the heating state or the non-heating state according to the received heating signal.

[0056] When the temperature detection circuit detects that the current working environment temperature of the inertial device is within the first temperature range, the high temperature sampling isolation module sends a heating signal to the heating alarm drive control module, and the heating alarm drive control module controls the heating switching module to switch to the heating state. The heating switching module quickly heats the heating plate under the first heating power provided by the heating mode switching circuit to increase the working temperature of the inertial device;

[0057] When the temperature detection circuit detects that the current working environment temperature of the inertial device is within the second temperature range, the high temperature sampling isolation module sends a heating signal to the heating alarm drive control module, and the heating alarm drive control module controls the heating switching module to maintain the heating state. The heating switching module performs normal heating on the heating plate under the second heating power provided by the heating mode switching circuit to further increase the working temperature of the inertial device;

[0058] When the temperature detection circuit detects that the current working environment temperature of the inertial device is within the third temperature range, the high temperature sampling isolation module sends a high temperature signal to the high temperature signal acquisition alarm circuit, and the high temperature signal acquisition alarm circuit sends the high temperature signal to the controller. The controller issues an alarm prompt based on the received signal. At the same time, the high temperature sampling isolation module sends a no heating signal to the heating alarm drive control module. The heating alarm drive control module controls the heating switching module to switch to the no heating state based on the received signal, and stops heating the heating plate.

[0059] The voltage of the first heating power source is greater than the voltage of the second heating power source.

[0060] Other specific implementations are the same as those in the embodiment and will not be described in detail here.

[0061] Embodiment 3: In this embodiment, the present application is further described in detail through specific embodiments and in combination with the accompanying drawings.

[0062] In this embodiment, the inertial device heating alarm test control system of the present invention also includes a heating plate, a temperature detection circuit, a heating alarm mode switching circuit, a temperature control module and a high temperature signal acquisition alarm circuit. The functions of the heating plate, the temperature detection circuit, the heating alarm mode switching circuit, the temperature control module and the high temperature signal acquisition alarm circuit are the same as those in Example 1.

[0063] like Figure 1 The temperature detection circuit shown includes a thermistor RT1, an H-bridge differential circuit, an operational amplifier N1, and an integration circuit arranged in the inertial device.

[0064] One end of the thermistor is grounded, and the other end is connected to one of the input ends of the H-bridge differential circuit. The other input end of the H-bridge differential circuit is connected to the voltage reference circuit.

[0065] The voltage reference circuit includes a voltage reference source, a fixed resistor R4 and a fixed resistor R5. One of the output ends of the voltage reference source is directly connected to the input end of the H-bridge differential circuit, and the other output end is connected to the fixed resistor R4. The fixed resistor R5 is connected in series with the fixed resistor R4 and then grounded. The connection node between the fixed resistor R5 and the fixed resistor R4 serves as the output end of the voltage reference circuit.

[0066] The H-bridge differential circuit is composed of fixed resistors R1, R2, R3 and RP1. The two output ends of the H-bridge differential circuit are respectively connected to the inverting input end and the non-inverting input end of the operational amplifier N1. The output end of the operational amplifier N1 is connected back to the inverting input end through an integration circuit. The output end of the operational amplifier N1 serves as the output end of the temperature detection circuit.

[0067] The integrating circuit can be of various types, for example, it can be set as an adjustable potentiometer RP2, or it can be set as a fixed resistor and capacitor connected in parallel. Figure 1 The integral circuit shown in is the adjustable potentiometer RP2, Figure 5 The integrating circuit shown in FIG. 1 is a fixed resistor and a capacitor connected in parallel.

[0068] The output end of the temperature detection circuit is respectively connected to one of the input ends of the heating mode switching circuit and one of the input ends of the heating alarm switching circuit, and the other input end of the heating mode switching circuit and the other input end of the heating alarm switching circuit are both connected to the output end of the voltage reference circuit (i.e., the connection node between the fixed resistor R5 and the fixed resistor R4).

[0069] The heating alarm switching circuit includes a high temperature sampling isolation module, a heating alarm drive control module, and a heating switching module.

[0070] Specifically, the high-temperature sampling isolation module includes an operational amplifier N2, an adjustable potentiometer RP3, a transistor Q1 and a photocoupler U1, the inverting input terminal of the operational amplifier N2 is connected to one of the output terminals of the voltage reference circuit (i.e., the connection node of the fixed resistor R5 and the fixed resistor R4), the non-inverting input terminal is connected to the sliding terminal of the adjustable potentiometer RP3, one of the fixed terminals of the adjustable potentiometer RP3 is grounded, and the other fixed terminal is connected to the output terminal of the temperature detection circuit (i.e., the output terminal of the operational amplifier N1), the output terminal of the operational amplifier N2 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is grounded, and the collector is connected to the negative pole of the photosensitive diode of the photocoupler U1.

[0071] Preferably, the heating alarm drive control module includes a fixed resistor R6, a fixed resistor R7, a fixed resistor R8, and a transistor Q3. One end of the fixed resistor R6 is connected to one end of the fixed resistor R7 and then connected to the collector of the phototransistor of the photoelectric coupler U1. The other end of the fixed resistor R6 is connected to the first power supply. The other end of the fixed resistor R7 is connected to the base of the transistor Q3. The emitter of the transistor Q3 and the emitter of the phototransistor of the photoelectric coupler U1 are grounded together. The collector of the transistor Q3 is connected to the fixed resistor R8. The other end of the fixed resistor R8 is connected to the first power supply. The connection node between the collector of the transistor Q3 and the fixed resistor R8 is connected to the heating switching module as an output.

[0072] Preferably, the heating switching module includes a fixed resistor R9, a transistor Q4, a relay J1, and a diode D1. One end of the fixed resistor R9 is connected to the connection node between the collector of the transistor Q3 and the fixed resistor R8, and the other end of the fixed resistor R9 is connected to the base of the transistor Q4. The emitter of the transistor Q4 is grounded, and the collector is connected to one end of the coil of the relay J1. The other end of the coil of the relay J1 is connected to the second power supply. The diode D1 is connected in parallel with the coil of the relay J1. The contact switch of the relay J1 is a double-pole double-throw switch and its common end is connected to the heating mode switching circuit, and the normally closed end is connected to the heating plate.

[0073] The high temperature signal acquisition alarm circuit includes a photoelectric coupler U2, a fixed resistor R10, and a fixed resistor R11. The cathode of the photosensitive diode of the photoelectric coupler U2 is connected to the anode of the photosensitive diode of the photoelectric coupler U1, the anode of the photosensitive diode of the photoelectric coupler U2 is connected to the first power supply (+15V power supply), the collector of the photosensitive transistor of the photoelectric coupler U2 is connected to the fourth power supply (+5v power supply), the emitter is connected to one end of the fixed resistor R10, the other end of the fixed resistor R10 is respectively connected to one end of the fixed resistor R11 and the signal input end of the controller, and the other end of the fixed resistor R11 is grounded.

[0074] The heating mode switching circuit includes an operational amplifier N2', an adjustable potentiometer RP4, a transistor Q2, a relay J2, and a diode D2. The non-inverting input terminal of the operational amplifier N2' is connected to the inverting input terminal of the operational amplifier N2, and the inverting input terminal is connected to the sliding terminal of the adjustable potentiometer RP4. One of the fixed terminals of the adjustable potentiometer RP4 is grounded, and the other fixed terminal is connected to the output terminal of the temperature detection circuit (i.e., the output terminal of the operational amplifier N2'), the output terminal of the operational amplifier N2' is connected to the base of the transistor Q2, the emitter of the transistor Q2 is grounded, and the collector is connected to one end of the relay J2 coil, and the other end of the relay J2 coil is connected to the third power supply (24V power supply), the diode D2 is connected in parallel with the coil of the relay J2, the contact switch of the relay J2 is a double-pole double-throw switch, and its common terminal is connected to the common terminal of the contact switch of the relay J1, the normally closed terminal is connected to the first heating power supply (32V power supply), and the normally open terminal is connected to the second heating power supply (24V power supply).

[0075] Assume that the voltage reference source outputs a 6V DC voltage, the thermistor RT1 set in the inertial device is a positive temperature coefficient thermistor (PTC), the temperature change rate of the thermistor RT1 is 0.385Ω / ℃, the heating plate RJR is a heating plate pasted on the outer surface of the inertial device, the normal working temperature of the inertial device is 60±0.1℃, and the temperature detection working range of the above temperature detection circuit is 0℃~80℃. Therefore, the inertial device heating alarm test control system includes three working stages, namely:

[0076] 1. Rapid heating stage: the working environment temperature of the inertial device RT1 is less than 49°C;

[0077] 2. High-precision constant temperature control stage (normal heating stage): 49℃≤RT1≤80℃

[0078] 3. High temperature alarm stage: RT1>80℃.

[0079] When the working environment temperature of thermistor RT1 in the inertial device is less than 49℃, due to the small resistance of RT1, the output voltage of operational amplifier N1 and the non-inverting input voltage of pin 3 of N2 are less than the comparison voltage of the inverting input of pin 2 of N2, so the pin 1 of N2 outputs a negative voltage, and the output voltage is less than 0.7V; at the same time, the inverting input voltage of pin 6 of N2' is less than the comparison voltage of the non-inverting input of pin 5 of N2', so the pin 7 of N2' outputs a positive voltage, and the output voltage is greater than 0.7V;

[0080] Since the output voltage of pin 1 of operational amplifier N2 is always less than 0.7V, the switching transistor Q1 works in the off-state, the phototransistor of optocoupler U1 works in the off-state, and the phototransistor of optocoupler U2 works in the off-state, and no alarm signal is generated. At this time, the switching transistor Q3 is saturated and turned on, while the switching transistor Q4 is in the off-state. In this way, the coil of relay J1 loses power, and the normally closed contact of the contact switch of relay J1 is in the energized state, that is, J1-1 is turned on with J1-2, and J1-4 is turned on with J1-5;

[0081] Since the output voltage of pin 7 of operational amplifier N2' is greater than 0.7V, the switching transistor Q2 is in a saturated conduction state, the coil of relay J2 is energized, and the normally open contact of the contact switch of relay J2 is in an energized state, that is, J2-1 and J2-3, J2-4 and J2-6 are turned on, so that relay J2 selects a DC voltage of 32V as the heating power supply to heat the heating plate RJR; under the control of the temperature control module, relays J1 and J2, in this on-off combination, realize rapid heating control of the heating plate G-RJR of the liquid floating gyroscope. In this working state, the contact switch diagram of relays J1 and J2 is as follows Figure 2 shown.

[0082] When the working environment temperature of thermistor RT1 in the inertial device is greater than 49℃ and less than 80℃, the resistance value of RT1 gradually increases, and the output voltage of operational amplifier N1 gradually increases, that is, the non-inverting input voltage of pin 3 of N2 also begins to increase, but it is still less than the comparison voltage of the inverting input of pin 2 of N2, so the output voltage of pin 1 of N2 is negative, and the output voltage is less than 0.7V; at the same time, the inverting input voltage of pin 6 of N2' also begins to increase until it is greater than the comparison voltage of the non-inverting input of pin 5 of N2', so the output voltage of pin 7 of N2' is negative, and the output voltage is less than 0.7V;

[0083] Since the output voltage of pin 1 of operational amplifier N2 is still less than 0.7V, the switching transistor Q1 works in the off-state, the phototransistor of optocoupler U1 works in the off-state, and the phototransistor of optocoupler U2 works in the off-state. At this time, no alarm signal is generated, and the switching transistor Q3 is saturated and turned on, and the switching transistor Q4 is in the off-state. In this way, the coil of relay J1 loses power, and the normally closed contact of the contact switch of J1 is in the attracted state, that is, J1-1 is turned on with J1-2, and J1-4 is turned on with J1-5;

[0084] Since the output voltage of pin 7 of operational amplifier N2' is less than 0.7V, the switching transistor Q2 becomes off, the coil of relay J2 loses power, and the normally closed contact of the contact switch of relay J2 is in the energized state, that is, J2-1 and J2-2, J2-4 and J2-5 are turned on, so that the relay switches and selects the DC voltage 24V as the heating power supply to heat the heating plate RJR; under the control of the temperature control module, relays J1 and J2 realize normal heating control of the heating plate G-RJR of the liquid floating gyroscope in this on-off combination. In this working state, the contact switch diagram of relays J1 and J2 is as follows Figure 3 shown.

[0085] When the working environment temperature of thermistor RT1 in the gyroscope is greater than or equal to 80℃, the resistance of RT1 increases further, and the output voltage of operational amplifier N1 becomes larger, that is, the non-inverting input voltage of pin 3 of N2 also increases, and is greater than the comparison voltage of the inverting input of pin 2 of N2, so pin 1 of N2 outputs a positive voltage, and the output voltage is greater than 0.7V; at the same time, the inverting input voltage of pin 6 of N2' also increases, and is greater than the comparison voltage of the non-inverting input of pin 5 of N2', so pin 7 of N2' outputs a negative voltage, and the output voltage is less than 0.7V. Therefore, the output voltage of pin 1 of the operational amplifier N2 is greater than 0.7V, the switching transistor Q1 works in a saturated conduction state, the phototransistor of the optocoupler U1 works in a conduction state, the phototransistor of the optocoupler U2 works in a conduction state, and the heating alarm mode switching circuit starts to work. After the fixed resistors R10 and R11 divide the voltage, the high temperature signal is sent to the CPEX bus computer for alarm sampling. The computer display screen displays a high temperature alarm prompt, and the buzzer is controlled to sound an alarm; at the same time, The switch transistor Q3 works in the off state, the switch transistor Q4 works in the saturated conduction state, the relay J1 coil is energized, and the contact switch of the relay J1 is switched from the normally closed contact to the normally open contact. The normally open contact is in the energized state, that is, J1-1 and J1-3, J1-4 and J1-6 are turned on. In this way, the heating plate G-RJR is disconnected from the second heating power supply (24V voltage). Under this on-off combination of relays J1 and J2, the heating circuit of the heating plate G-RJR of the liquid floating gyroscope is cut off. In this working state, the contact switch diagram of relays J1 and J2 is as follows: Figure 4 shown.

[0086] It should be clear that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. An inertial device heating alarm test control system, characterized in that: It includes a heating plate, a temperature detection circuit, a heating alarm mode switching circuit, a temperature control module and a high temperature signal acquisition alarm circuit; The heating sheet is arranged on the inertial device and is used to heat the working environment temperature during the performance test of the inertial device; The output end of the temperature detection circuit is connected to the input end of the heating alarm mode switching circuit, and is used to detect the working environment temperature during the inertial device performance test in real time and transmit the detected temperature signal to the heating alarm mode switching circuit; The output end of the heating alarm mode switching circuit is connected to the heating plate and the high temperature signal acquisition alarm circuit, and is used to control the switching of the heating or alarm mode according to the received temperature signal. When in the heating mode, different heating power supplies are provided according to the temperature to heat the heating plate to change the working temperature of the inertial device. When in the alarm mode, a high temperature signal is sent to the high temperature signal acquisition alarm circuit; The temperature control module is used to control the working temperature of the inertial device during the heating process of the heating plate; The high temperature signal acquisition alarm circuit is used to acquire high temperature signals and send the high temperature signals to the controller, and the controller issues an alarm prompt based on the received signals.

2. The inertial device heating alarm test control system according to claim 1, characterized in that: The heating alarm mode switching circuit comprises a voltage reference circuit, a heating mode switching circuit and a heating alarm switching circuit, one output end of the voltage reference circuit is connected to the input end of the temperature detection circuit, and the other output end is respectively connected to one input end of the heating mode switching circuit and one input end of the heating alarm switching circuit, and the other input end of the heating mode switching circuit and the other input end of the heating alarm switching circuit are both connected to the output end of the temperature detection circuit; The voltage reference circuit is used to provide a reference voltage; The heating mode switching circuit is used to control the heating mode of the heating plate according to the received temperature signal and the reference voltage, and provide corresponding heating power to the heating alarm switching circuit according to the heating mode; The heating alarm switching circuit is used to control the switching of the heating or alarm mode according to the received temperature signal. When in the heating mode, the heating power provided by the heating mode switching circuit is used to heat the heating plate to change the working temperature of the inertial device. There is at least one heating mode in the heating mode; when in the alarm mode, a high temperature signal is sent to the high temperature signal acquisition alarm circuit.

3. The inertial device heating alarm test control system according to claim 2, characterized in that: The heating alarm switching circuit includes a high temperature sampling isolation module, a heating alarm drive control module, and a heating switching module. The high temperature sampling isolation module is used to send a heating signal to the heating alarm drive control module or send a high temperature signal to the high temperature signal acquisition alarm circuit according to the received temperature signal and reference voltage, so as to switch the heating or alarm mode; The heating alarm drive control module is used to control the heating switching module to switch the heating state or the non-heating state according to the received heating signal.

4. The inertial device heating alarm test control system according to claim 3, characterized in that: When the temperature detection circuit detects that the current working environment temperature of the inertial device is within the first temperature range, the high temperature sampling isolation module sends a heating signal to the heating alarm drive control module, and the heating alarm drive control module controls the heating switching module to switch to the heating state. The heating switching module quickly heats the heating plate under the first heating power provided by the heating mode switching circuit to increase the working temperature of the inertial device; When the temperature detection circuit detects that the current working environment temperature of the inertial device is within the second temperature range, the high temperature sampling isolation module sends a heating signal to the heating alarm drive control module, and the heating alarm drive control module controls the heating switching module to maintain the heating state. The heating switching module performs normal heating on the heating plate under the second heating power provided by the heating mode switching circuit to further increase the working temperature of the inertial device; When the temperature detection circuit detects that the current working environment temperature of the inertial device is within the third temperature range, the high temperature sampling isolation module sends a high temperature signal to the high temperature signal acquisition alarm circuit, and the high temperature signal acquisition alarm circuit sends the high temperature signal to the controller. The controller issues an alarm prompt based on the received signal. At the same time, the high temperature sampling isolation module sends a no heating signal to the heating alarm drive control module. The heating alarm drive control module controls the heating switching module to switch to the no heating state based on the received signal, and stops heating the heating plate.

5. The inertial device heating alarm test control system according to claim 3 or 4, characterized in that: The high temperature sampling isolation module includes an operational amplifier N2, an adjustable potentiometer RP3, a transistor Q1 and a photoelectric coupler U1. The inverting input terminal of the operational amplifier N2 is connected to one of the output terminals of the voltage reference circuit, and the non-inverting input terminal is connected to the sliding terminal of the adjustable potentiometer RP3. One of the fixed terminals of the adjustable potentiometer RP3 is grounded, and the other fixed terminal is connected to the output terminal of the temperature detection circuit. The output terminal of the operational amplifier N2 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is grounded, and the collector is connected to the negative electrode of the photosensitive diode of the photoelectric coupler U1. The photosensitive transistor of the photoelectric coupler U1 is connected to the heating alarm drive control module.

6. The inertial device heating alarm test control system according to claim 5, characterized in that: The high temperature signal acquisition alarm circuit includes a photoelectric coupler U2, a fixed resistor R10, and a fixed resistor R11. The cathode of the photosensitive diode of the photoelectric coupler U2 is connected to the anode of the photosensitive diode of the photoelectric coupler U1, the anode of the photosensitive diode of the photoelectric coupler U2 is connected to the first power supply, the collector of the photosensitive transistor of the photoelectric coupler U2 is connected to the fourth power supply, the emitter is connected to one end of the fixed resistor R10, the other end of the fixed resistor R10 is respectively connected to one end of the fixed resistor R11 and the signal input end of the controller, and the other end of the fixed resistor R11 is grounded.

7. The inertial device heating alarm test control system according to claim 5, characterized in that: The heating alarm drive control module includes a fixed resistor R6, a fixed resistor R7, a fixed resistor R8, and a transistor Q3. One end of the fixed resistor R6 is connected to one end of the fixed resistor R7 and then connected to the collector of the phototransistor of the photoelectric coupler U1. The other end of the fixed resistor R6 is connected to the first power supply. The other end of the fixed resistor R7 is connected to the base of the transistor Q3. The emitter of the transistor Q3 and the emitter of the phototransistor of the photoelectric coupler U1 are grounded together. The collector of the transistor Q3 is connected to the fixed resistor R8. The other end of the fixed resistor R8 is connected to the first power supply. The connection node between the collector of the transistor Q3 and the fixed resistor R8 is connected to the heating switching module as an output.

8. The inertial device heating alarm test control system according to claim 7, characterized in that: The heating switching module includes a fixed resistor R9, a transistor Q4, a relay J1, and a diode D1. One end of the fixed resistor R9 is connected to the connection node between the collector of the transistor Q3 and the fixed resistor R8, and the other end of the fixed resistor R9 is connected to the base of the transistor Q4. The emitter of the transistor Q4 is grounded, and the collector is connected to one end of the coil of the relay J1. The other end of the coil of the relay J1 is connected to the second power supply. The diode D1 is connected in parallel with the coil of the relay J1. The contact switch of the relay J1 is a double-pole double-throw switch, and its common end is connected to the heating mode switching circuit, and the normally closed end is connected to the heating plate.

9. The inertial device heating alarm test control system according to claim 8, characterized in that: The heating mode switching circuit includes an operational amplifier N2', an adjustable potentiometer RP4, a transistor Q2, a relay J2, and a diode D2. The non-inverting input terminal of the operational amplifier N2' is connected to the inverting input terminal of the operational amplifier N2, and the inverting input terminal is connected to the sliding terminal of the adjustable potentiometer RP4. One of the fixed terminals of the adjustable potentiometer RP4 is grounded, and the other fixed terminal is connected to the output terminal of the temperature detection circuit. The output terminal of the operational amplifier N2' is connected to the base of the transistor Q2, the emitter of the transistor Q2 is grounded, and the collector is connected to one end of the coil of the relay J2, and the other end of the coil of the relay J2 is connected to the third power supply. The diode D2 is connected in parallel with the coil of the relay J2. The contact switch of the relay J2 is a double-pole double-throw switch, and its common terminal is connected to the common terminal of the contact switch of the relay J1, the normally closed terminal is connected to the first heating power supply, and the normally open terminal is connected to the second heating power supply.

10. The inertial device heating alarm test control system according to claim 9, characterized in that: The temperature detection circuit includes a thermistor, an H-bridge differential circuit, an operational amplifier N1, and an integration circuit arranged in the inertial device. One end of the thermistor is grounded, and the other end is connected to one of the input ends of the H-bridge differential circuit. The other input end of the H-bridge differential circuit is connected to the voltage reference circuit. The two output ends of the H-bridge differential circuit are respectively connected to the inverting input end and the non-inverting input end of the operational amplifier N1. The output end of the operational amplifier N1 connects the output back to the inverting input end through the integration circuit, and the output end of the operational amplifier N1 serves as the output end of the circuit.

11. The inertial device heating alarm test control system according to claim 2 or 10, characterized in that: The voltage reference circuit includes a voltage reference source, a fixed resistor R4 and a fixed resistor R5. One of the output ends of the voltage reference source is connected to the input end of the temperature detection circuit, and the other output end is connected to the fixed resistor R4. The fixed resistor R5 is connected in series with the fixed resistor R4 and then grounded. The connection node between the fixed resistor R5 and the fixed resistor R4 serves as the output of the circuit.

12. The inertial device heating alarm test control system according to claim 10, characterized in that: The integration circuit includes an adjustable potentiometer RP2, or the integration circuit includes a fixed resistor and a capacitor connected in parallel.

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